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JP2005167378

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2005167378
PROBLEM TO BE SOLVED: To enable a passenger sitting on each seat to view music etc. emitted
from sound sources selected individually in a good state. SOLUTION: The seat 3 comprises a pair
of units 10R, 10L attached to a pair of headrest shafts 5, 6 for supporting the headrest 4 on the
seat 3. Each unit 10 includes an input unit 11 to which a reproduction signal is input from a
sound source, a speaker unit 14 incorporating a speaker 13 in a housing 12, an attachment
member 15 detachably attached to each headrest shaft 5 and 6, The housing 12 includes a
support arm 16 whose other end is fixed to the mounting member 15. The support arm portion
16 has flexibility over the entire length, and the midway portion is appropriately curved such
that the speaker unit 14 faces the ear of the passenger M. [Selected figure] Figure 2
Speaker device
[0001]
The present invention relates to a speaker device which is individually attached to and detached
from each seat of a vehicle such as a car, and enables a passenger sitting on the seat to
individually view and listen to reproduced sound from a sound source.
[0002]
A car is equipped with a tuner that receives, for example, radio broadcast and television
broadcast as a sound source, and various audio devices such as a disc player and a cassette tape
player, and the reproduced sound is viewed by a speaker appropriately installed in the car.
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1
In addition, there are car navigation devices where voice guidance is provided from other internal
sound sources, for example, portable audio devices brought in by passengers, and portable
telephones as other sound sources. As car navigation devices, those equipped with an audio
function have been provided along with the advancement of functions and multifunctionality.
[0003]
In cars and the like, as described above, various sound sources are provided. For example, a
passenger can view the same reproduced sound because the reproduced signal from the sound
source selected by the driver is emitted from the speaker. become. When the passenger wants to
listen to favorite music etc. in an individual, for example, he / she is viewing the favorite music
etc. by headphones with a portable audio device brought in.
[0004]
On the other hand, in an automobile etc., in addition to fixed speakers respectively installed at
appropriate positions such as a front part and a rear part, a speaker system that constitutes a
dynamic sound field in a car by incorporating a speaker device in a headrest of each seat Have
also been proposed (eg, Patent Documents 1 to 3). Moreover, in a car etc., installing a speaker
apparatus using a headrest axis which supports a headrest of each seat is also proposed (for
example, patent documents 4 and patent documents 5).
[0005]
Patent Document 1: JP-A-8-289389 Patent Document 2: JP-A-9-1713887 Patent Document 2:
JP-A-55-109450 Patent Document 2: JP-A-61-16585 Patent Document 2: JP-A-9-286285
[0006]
Each of the headrest speaker devices described above forms an optimal sound field in which the
reproduction sound emitted from the fixed speaker is corrected for the variation in the sound
quality, the volume and the like depending on the position of the seat, and the passenger views
the good reproduction sound. Make it possible.
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In addition, by configuring the headrest speaker device to be able to select the sound source for
each seat, for example, it is possible for the passenger to individually view and listen to favorite
music without the bother of wearing headphones. Do. Furthermore, the headrest speaker device
suppresses the playback sound from other seats where different sound sources are selected by
emitting the playback sound near each passenger's ear.
[0007]
However, the above-mentioned headrest built-in speaker device must be configured to be
expensive for the entire system when installed for each seat and to be adapted to the headrest
designed for each vehicle type, so it is high grade grade There was a problem that it was installed
only in the car and there was no versatility. In addition, such a speaker device has a problem that
utilization efficiency is poor when installed in all the seats, and it can not be used by a passenger
sitting in a seat that is not installed.
[0008]
The above-described headrest detachable type speaker device is manufactured relatively
inexpensively and can be installed on an existing car as needed. However, such a speaker device
becomes large when it has a certain level of output performance and the projection amount from
the seat also becomes large, and becomes a hindrance when not in use, and in the event of an
accident, the passenger is dangerous. There is a problem of being
[0009]
Furthermore, in any of the above-described speaker devices, since they are installed at a fixed
position with respect to the seat, they should be installed facing the optimal position with respect
to the ears of various passengers of different body types. It was difficult. The speaker device is
largely separated from the ear, especially when a small child sits in a seat, so that the abovedescribed features can not be exhibited at all, and the sound leakage to the surroundings also
increases.
[0010]
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Therefore, an object of the present invention is to provide a speaker device that enables a
passenger sitting on each seat to view music etc. emitted from sound sources individually
selected respectively in a good state.
[0011]
A speaker device according to the present invention for achieving the above-mentioned object is
provided by right and left disposed on both sides of a passenger seated in a seat by being
respectively attached to a pair of headrest shafts that support the headrest in height adjustable
with respect to the seat. It consists of a pair of units.
In the speaker apparatus according to the present invention, each unit includes an input unit to
which a reproduction signal is input from an appropriate sound source, a speaker unit including
a speaker that reproduces the reproduction signal and emits the sound in the housing, and each
headrest shaft It comprises a mounting member to be attached to and detached from the
housing, and a support arm having one end fixed to the housing of the speaker unit and the other
end fixed to the mounting member and having flexibility over the entire length.
[0012]
In the speaker device according to the present invention, the one end of each support arm is
fixed to the opposite headrest shaft via the attachment member, and installed for each seat in the
car, and the input unit is connected to an appropriate sound source Ru. In the speaker device
according to the present invention, each support arm portion is appropriately curved in the
middle according to the passenger sitting on the seat so that the speaker unit faces the ear of the
passenger sitting on the seat The playback sound is viewed at each seat.
[0013]
According to the speaker device of the present invention configured as described above, the
existing vehicle is also installed as needed for any seat by a simple operation of fixing the
mounting member to the headrest shaft, and the seat For example, it is possible to emit and play
a reproduced sound based on a reproduced signal from an individually selected sound source, for
a passenger who is seated in the seat. According to the speaker device of the present invention,
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the speaker unit can be made to face the ear of the passenger sitting on the seat by appropriately
bending the middle portion by providing the flexible support arm portion. It is possible to view
the playback sound in the normal state. According to the speaker device according to the present
invention, even when the passenger is bumped into the speaker unit, the support arm portion is
deformed to absorb the impact, thereby securing safety in the event of an accident or the like. Ru.
[0014]
Hereinafter, the speaker device 1 shown in the drawings as an embodiment of the present
invention will be described in detail. The speaker device 1 is generally referred to as a seat 3
(hereinafter referred to as a seat 3) as shown in FIGS. 1 and 2. ) Are installed and used on all of
these seats or any selected seat by a retrofit operation as needed. The speaker device 1 is an
appropriate sound source such as a broadcast receiving tuner mounted on a car 2, a car audio
device such as a disc player or a cassette tape player, a car navigation device, or a portable audio
device carried by a passenger into the car. , And allows the passenger sitting on the seat 3 to
individually view the reproduced sound based on the reproduced signal output from the sound
source.
[0015]
The speaker device 1 is generically referred to as a headrest 4 for each of the seats 3 (hereinafter
referred to as the headrest 4). As needed, with respect to the pair of left and right first headrest
shafts 5 or second headrest shafts 6 that support the H.sub.2) so that its height position is
adjustable. The first headrest shaft 5 and the second headrest shaft 6 are assembled so as to be
movable up and down along guides provided in the seat 3 so that the lower ends thereof are
connected to each other, although the details are omitted. The first headrest shaft 5 and the
second headrest shaft 6 are locked by the lock mechanism in a state of being pulled out from the
seat 3 to a predetermined position, thereby holding the headrest 4 at a predetermined height
position from the seat 3.
[0016]
The speaker device 1 is attached in a state where the first headrest shaft 5 and the second
headrest shaft 6 are slightly pulled out from the seat 3 and exposed as shown in FIG. The speaker
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device 1 includes a pair of left and right first units 10R and a second unit 10L. In the speaker
device 1, the first unit 10 </ b> R and the second unit 10 </ b> L are configured to be
symmetrical in the left-right direction, and therefore, will be simply described as a unit 10
hereinafter.
[0017]
The speaker device 1 has the speaker unit 14 including the input unit 11 in which each unit 10 is
connected to each of the above-described sound sources, the housing 12 and the speaker 13, and
the first headrest shaft 5 or the second headrest shaft 6. It is comprised from the attachment part
15 and the support arm part 16 which are attached or detached. In the state where each unit 10
is attached to the first headrest shaft 5 and the second headrest shaft 6, the speaker device 1
faces the ears of the passenger M who has sat each speaker unit 14 on the seat 3 as shown in
FIG. It is used as it is.
[0018]
Even if the speaker apparatus 1 incorporates the slightly large-sized speaker 13 by connecting
the input unit 11 and the speaker unit 14 which are independently configured as will be
described in detail later via the support arm unit 16. It is miniaturized. The speaker device 1
uses, for example, an in-vehicle battery as a drive power source and directly connected to an
output terminal provided in an in-vehicle audio device or the like, so that the input unit 11 can be
miniaturized. Part of the functions of the speaker unit 14 may be incorporated in the speaker
unit 14.
[0019]
The input unit 11 has a case 17 as shown in FIGS. 2 and 3, and is connected to the speaker unit
14 by a pair of reproduction signal supply cords 18a for supplying a reproduction signal.
Although not described in detail, the input unit 11 is provided with an appropriate mounting
portion having a hook or clip structure in the case 17, and the mounting portion is installed at an
appropriate location in the vehicle. The input unit 11 has a length with a sufficient margin from
the installation location of the case 17 in a state where the reproduction signal supply cord 18 a
attaches the speaker device 1 to each of the headrest shafts 5 and 6.
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[0020]
Although the input unit 11 is provided independently for each of the first unit 10R and the
second unit 10L, for example, the reproduction signal supply code 18a on the second unit 10L
side may be led to the case 17 on the first unit 10R side. It may be configured by one case 17
according to In the input unit 11, the reproduction signal input code 18b is extracted from the
case 17, and the pin plug 19 provided at the tip of the reproduction signal input code 18b is
connected to the above-described sound sources to supply the reproduction signal.
[0021]
In the input unit 11, a dry battery or a secondary battery for power supply is housed inside the
case 17, and a circuit board on which a power supply circuit, an amplifier circuit and the like are
mounted is housed. The input unit 11 may be provided with a sound source selection unit and a
control unit such as a volume. In the speaker device 1, a radio receiving circuit using, for
example, infrared rays is mounted in the case 17 of the input unit 11 to replace or add to the
reproduction signal input code 18 b and the pin plug 19 described above. The reproduction
signal may be supplied wirelessly from the device side. In the speaker device 1, transmission and
reception of the reproduction signal may be performed wirelessly between the input unit 11 and
the speaker unit 14.
[0022]
By the way, in the speaker device 1, the reproduction sound emitted from the speaker 13 by
arranging the speaker units 14 so as to be opposed to the ears of the passenger M sitting on the
seat 3 by the support arm portion 16 as described later. The passenger M is configured to listen
directly. In a general speaker device, an efficient sound pressure level (SPL) characteristic can be
obtained by arranging the speaker so that its central axis is parallel to the earhole of the viewer.
Make it In a general speaker device, distortion occurs when the reproduced sound is directly
listened to near the sound emitting portion of the speaker.
[0023]
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Therefore, in the speaker device 1, the speaker unit 14 has the housing 12 and the speaker 13 as
described above, and the sound pressure is provided by providing the main reflector 21 and the
side reflector 22 as shown in FIGS. 3 and 4. It is configured to improve the characteristics and
the sound quality characteristics. The housing 12 is generally formed in a substantially cup
shape with one side surface portion opened by a synthetic resin material, and although not
shown, an appropriate mounting portion is integrally formed inside. In the housing 12, although
the details are omitted, the speaker 13 is fixed on each mounting portion via the baffle plate 20
so that the sound emitting portion 13a is accommodated so as to face the opening 12a. In
addition, the housing 12 should just be comprised equivalent to a general speaker box, and is not
limited to a cup-shaped shape.
[0024]
Although not described in detail, the housing 12 is formed at its outer peripheral portion with an
attachment hole which penetrates the inner space and into which the bush 23 is inserted. The
bush 23 constitutes a mounting member for mounting the support arm portion 16 while
preventing leakage of reproduced sound to the housing 12. The bush 23 constitutes a pullout
member for protecting the signal supply cord 18 and pulling out the reproduction signal feed
cord 18 a from the housing 12.
[0025]
Each speaker unit 14 is provided, for example, with a switch or a volume disposed on the
housing 12 between the speaker 13 and the reproduction signal supply cord 18a to switch on
and off the reproduction signal supplied. It is also good. Of course, these switches and volumes
may be provided, for example, in the case 17 of the input unit 11 described above in order to
keep the speaker unit 14 compact.
[0026]
The main reflector 21 is formed of a synthetic resin material or the like in the shape of a disc
having a diameter substantially the same as the outer diameter of the housing 12 and having a
relatively large thickness, and as shown in FIGS. It is combined with the opening 12a of the
housing 12 so as to face the 13 sound emitting parts 13a with a predetermined interval. The
main reflector 21 is inclined relative to the sound emitting portion 13a of the speaker 13 with
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respect to the surface direction and the diameter direction by the structure of the side reflector
22 described later in detail, and emits the reproduced sound emitted from the sound emitting
portion 13a. The light is reflected from the opening 24 toward the outer periphery of the
housing 12.
[0027]
As described above, the main reflector 21 is configured to be inclined in the surface direction and
the diameter direction so that the sound emission opening 24 has an opening dimension of the
upper portion slightly larger than an opening dimension of the lower portion. The sound release
opening 24 is thereby configured to be more parallel to the earhole of the passenger M seated in
the seat 3.
[0028]
In the speaker device 1, the speaker unit 14 is disposed on both sides of both ears of the
passenger M sitting on the seat 3, but the sound emitting portion 13a of the speaker 13 is made
to face both ears in order to maintain sound pressure characteristics. When this happens, the
projected area becomes large, and the amount of protrusion of the side part becomes large,
which hinders the side view. In the speaker device 1, the opening of the housing is disposed so as
to open in the front direction parallel to the face direction of the passenger sitting on the seat 3
so that the projection area is reduced to reduce the side of the passenger M It is used in such a
way as to secure a view. In the speaker device 1, the main reflector 21 reflects the reproduction
sound emitted from the speaker 13 toward the sound emission opening 24 side, and thereby the
axial line between the sound emitting portion 13 a of the speaker 13 and the both ears of the
passenger M. Thus, the sound pressure level characteristic of the passenger M can be improved.
[0029]
In the speaker unit 14, by providing the side reflector 22, it is possible to prevent the reproduced
sound reflected by the main reflector 21 from leaking from the outer peripheral portion of the
housing 12 to the periphery and to efficiently guide it to both ears of the passenger M.
Configured The side reflector 22 is made of a synthetic resin material or the like to have
substantially the same diameter as the housing 12 and is formed in a substantially semicylindrical shape having a substantially 1/2 circumferential length. The lower reflector 22 is
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fixed to the opening edge of the opening 12 a of the housing 12 so as to be coaxial with the
housing 12.
[0030]
By fixing the upper end edge of the side reflector 22 to the inner surface of the main reflector
21, the side reflector 22 constitutes a sound emission opening 24 having a substantially 1⁄2
circumferential length between the housing 12 and the main reflector 21. The side reflector 22
prevents the reproduction sound from leaking from the entire circumference of the housing 12
so that the reproduction sound reflected by the main reflector 21 is emitted sideward from the
sound emission opening 24.
[0031]
In the side reflector 22, the side edge for fixing the main reflector 21 is formed such that the
axial length gradually increases from one end to the other end in the circumferential direction
and from the inner circumferential side to the outer circumferential side It is formed with an
inclination that gradually reduces the height toward the end. Therefore, the side reflectors 22 are
integrated so as to incline the main reflector 21 with respect to the housing 12 with respect to
the surface direction and the diameter direction and to gradually increase the opening shape
toward the sound emission opening 24. By doing this, the sound release opening 24 is opened
toward the passenger M's ear.
[0032]
The side reflectors 22 maintain the sound pressure characteristics directed to the passenger M to
enhance directivity so that the reproduced sound can be viewed in a good state. The side
reflectors 22 prevent sound leakage from the outer peripheral portion of the housing 12 and
suppress annoyance due to interference between passengers who listen to different reproduction
sounds.
[0033]
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By the way, in the speaker unit 14, when the main reflector 21 is directly attached to the housing
12, the main reflector 21 has a structure in which a partial region of the outer peripheral portion
is fixed in a cantilever state. In the speaker unit 14, therefore, it becomes difficult to fix the main
reflector 21 with high strength. In the speaker unit 14, when a large force is applied to the main
reflector 21, the speaker unit 14 may be detached from the housing 12 or damaged. In the
speaker unit 14, the main reflector 21 vibrates to generate noise in accordance with the
reflection operation of the reproduction sound, and the listening of the good reproduction sound
is hindered. In the speaker unit 14, when the main reflector 21 is firmly fixed to the housing 12,
the size is large and the weight is also large.
[0034]
The side reflector 22 fixes the main reflector 21 to the housing 12 in a substantially half length
area of the opening 12 a in the circumferential direction. The side reflectors 22 are integrally
formed in a state of being orthogonal to the inner surface of the main reflector 21, thereby
exerting a rib function to improve the mechanical rigidity of the main reflector 21. Therefore, in
the speaker unit 14, the main reflector 21 can be firmly fixed to the housing 12, and the
mechanical strength is improved and the generation of noise due to vibration is reduced.
[0035]
The speaker device 1 is attached to and detached from the first headrest shaft 5 or the second
headrest shaft 6 described above via the attachment portion 15. The mounting portion 15
includes the mounting member 25, the first mounting bolt 26 and the first nut 27, and a pair of
second mounting bolts 28 a and 28 b (hereinafter collectively referred to as second mounting
bolts 28). And a pair of second nuts 29 (hereinafter collectively referred to as second nuts 29).
And. The mounting member 25 is generally formed in a substantially rectangular plate shape
from a lightweight synthetic resin material or an aluminum alloy material having high
mechanical strength, and as shown in FIGS. 5 and 6, the headrest shaft fitting hole 30; Support
arm attachment hole 31, first slotted groove 32, second slotted groove 33, first bolt hole 34, and
a pair of second bolt holes 35a and 35b (hereinafter collectively referred to as second bolt holes
35) . And are provided.
[0036]
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The headrest shaft fitting hole 30 has an inner diameter substantially equal to the outer diameter
of the first headrest shaft 5 or the second headrest shaft 6 and is formed to penetrate the
mounting member 25 in the thickness direction. The headrest shaft fitting hole 30 is partially
formed with a first slit groove 32 opened at the side end of the mounting member 25 over the
entire length. The mounting member 25 extends the opposing end portions 25 a and 25 b
divided by the first groove dividing groove 32 to allow the first headrest shaft 5 or the second
headrest shaft 6 to be fitted to the headrest shaft fitting hole 30 from the side. Make it fit.
[0037]
The mounting member 25 is formed with a first bolt hole 34, which is in communication with the
first slot 32 at right angles, penetrating in the thickness direction. In the mounting member 25,
the first mounting bolt 26 is passed through the first bolt hole 34 in a state where the first
headrest shaft 5 or the second headrest shaft 6 is fitted in the headrest shaft fitting hole 30. The
mounting member 25 is fixed by tightening the outer peripheral portion of the first headrest
shaft 5 or the second headrest shaft 6 in the headrest shaft fitting hole 30 by screwing the first
nut 27 into the tip end portion of the first mounting bolt 26 Do.
[0038]
The mounting member 25 is removed from the first headrest shaft 5 and the second headrest
shaft 6 by loosening the first nut 27 and removing the first mounting bolt 26 from the first bolt
hole 34. The mounting member 25 can be attached to the first headrest shaft 5 or the second
headrest shaft 6 by using, for example, a wing nut for the first nut 27, and the removal operation
can be performed easily without using a jig or the like. become.
[0039]
The support arm attachment hole 31 is formed to penetrate the attachment member 25 in the
thickness direction orthogonal to the penetration direction of the headrest shaft fitting hole 26.
The support arm attachment hole 31 is partially formed with a second slit groove 33 opened at
the side end of the attachment member 25 over the entire length. The attachment member 25 is
fitted with a connecting pipe member 37a provided on a helical pipe 36 constituting a support
arm portion 16 described later in a state in which the opposing end portions 25c and 25d
partitioned by the second slip groove 33 are expanded. It is inserted.
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[0040]
In the mounting member 25, second bolt holes 35 communicating perpendicularly to the second
slotted groove 33 are formed vertically spaced apart and penetrated in the thickness direction. In
the mounting member 25, the second mounting bolt 28 is respectively penetrated through the
second bolt hole 35 in a state in which the helical tube 36 is inserted into the support arm
mounting hole 31. The mounting member 25 is fixed by tightening the outer peripheral portion
of the first headrest shaft 5 or the second headrest shaft 6 in the support arm mounting hole 31
by screwing the second nut 29 into the tip end portion of the second mounting bolt 28
respectively. Do.
[0041]
The mounting member 25 removes the support arm portion 16 by loosening the second nut 29
and removing the second mounting bolt 28 from the second bolt hole 35. Therefore, the
mounting member 25 enables the support arm portion 16 and the speaker unit 14 to be
removed from the seat 3 while being attached to the first headrest shaft 5 and the second
headrest shaft 6.
[0042]
The mounting portion 25 is not limited to the above-described configuration, and may be any
suitable structure that allows the speaker device 1 to be detachably attached to the first headrest
shaft 5 or the second headrest shaft 6. The mounting portion 25 may have, for example, a socalled laundry peg that sandwiches the first headrest shaft 5 and the second headrest shaft 6.
[0043]
The support arm portion 16 is composed of the above-described spiral tube 36, and a first
connecting tube member 37 and a second connecting tube member 38 integrated with both ends
36a and 36b of the spiral tube 36, respectively. The helical tube 36 is made of a light-weight,
mechanically strong synthetic resin material or a metal material such as stainless steel or an
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aluminum alloy, and is made of a tubular material having a substantially corrugated cross section
continuously formed in the axial direction. The helical tube 36 self-holds a predetermined shape
in a normal state as is well known, but it is curved at any position and at any angle by applying a
strong force, and this curved state is maintained. It has flexibility.
[0044]
The helical tube 36 holds the speaker unit 14 in a predetermined posture with the mounting
portion 15 by the above-described characteristics, and enables the speaker unit 14 to be directed
to any angle or position. The helical tube 36 pulls out the reproduction signal supply cord 18 a
from the speaker unit 14 and guides it to the seat 3 without making it fly. Although not shown,
the helical tube 36 is attached to a blade made of a resin sheet or the like on the outer peripheral
portion, thereby restricting the change in length of the entire length and preventing the adhesion
of dust or the like. In the case of injury, we will try for protection.
[0045]
The first connecting pipe member 37 is formed to have substantially the same diameter as the
shaft hole of the bush 23 provided in the housing 12 of the speaker unit 14 described above, and
a screw is formed on the outer peripheral portion although details are omitted. One end of the
first connection pipe member 37 is connected to one end 36 a of the helical pipe 36, and the
other end side formed with the outer peripheral screw portion penetrates the bush 23 and is
inserted into the housing 12. The outer peripheral screw portion of the first connection pipe
member 37 is screwed and fixed to a mounting portion formed in the housing 12. The
reproduction signal supply cord 18 a connected to the speaker 13 is inserted into the first
connection pipe member 37 and is introduced into the spiral pipe 36.
[0046]
The second connection pipe member 38 is formed to have substantially the same diameter as the
shaft hole of the support arm mounting hole 31 of the mounting member 25 described above,
and one end side thereof is coupled to the one end portion 36 a of the spiral pipe 36. The second
connecting pipe member 38 is penetrated through the support arm mounting hole 31 and is
fixed to the mounting member 25 by tightening the second nut 29 against the second mounting
bolt 28 as described above. From the second connection pipe member 38, the reproduction
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signal input code 18b having the spiral pipe 36 inserted therein is drawn out.
[0047]
In the speaker device 1 configured as described above, as shown in FIG. 2, the first unit 10R is
attached to the first headrest shaft 5 exposed by slightly pulling up the headrest 4 from the seat
3 and the second headrest The second unit 10L is attached to the shaft 6. In the speaker device
1, each unit 10 has the mounting portion 15 fixed to the first headrest shaft 5 or the second
headrest shaft 6, and the input portion 11 is connected to an appropriate sound source mounted
on the automobile 2. In the speaker device 1, the support arm portion 16 is appropriately bent
along the passenger M sitting on the seat 3 so that the sound emission opening 24 of the speaker
unit 14 is seated on the seat 3. Make it face the ear of person M.
[0048]
In the speaker device 1, the first headrest shaft 5 or the second headrest shaft 6 is fitted in the
headrest shaft fitting hole 30 of the mounting member 25, and the first mounting bolt 26
inserted into the first bolt hole 34 The mounting member 25 is fixed to the first headrest shaft 5
or the second headrest shaft 6 by screwing and tightening the first nut 27. In the speaker device
1, the mounting portion 15 is hidden between the seat 3 and the headrest 4 by pressing the
headrest 4 against the seat 3.
[0049]
In the speaker device 1, the second connection pipe member 38 of the support arm portion 16 is
inserted into the support arm attachment hole 31 of the attachment member 25. In the speaker
device 1, the support arm 16 is integrated with the mounting portion 15 by screwing the second
nut 29 into the second mounting bolt 28 inserted into the second bolt hole 35 and tightening it.
In the speaker device 1, the speaker unit 14 is integrated with the support arm portion 16.
[0050]
In the speaker device 1, the reproduction signal input cord 18 b drawn from the second
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connection pipe member 38 is guided into the vehicle without being in the way, and the case 17
of the input unit 11 is fixed at an appropriate location via the coupling portion. In the speaker
device 1, the pin plug 20 of the input unit 11 is connected to the output jack of an appropriate
sound source, so that the reproduction signal output from the sound source is a speaker unit via
the reproduction signal supply code 18a and the reproduction signal input code 18b. It is
supplied to 14.
[0051]
In the speaker device 1, the passenger M sitting on the seat 3 performs the adjusting operation
of the support arm portion 16 so that the speaker unit 14 is located near the ear. In the speaker
device 1, as described above, by using the helical tube 36 for the support arm portion 16, it is
possible to appropriately curve or change the direction midway, and as shown in FIG. 7, the
speaker unit 14 faces the passenger M's ear. In the speaker device 1, in this case, the bending
state of the support arm portion 16 is adjusted such that the sound emission opening 24 of the
speaker unit 14 faces the ear of the passenger M facing forward.
[0052]
In the speaker device 1, as shown in FIG. 7, when the passenger sitting on the seat 3 is an adult
MM, an adjustment amount for bending the spiral tube 36 of the support arm portion 16
because the head is at the position of the headrest 4 There are also few. On the other hand, in the
speaker device 1, the head may not reach the headrest 4 when the passenger sitting on the seat
3 is a child MS as shown in FIG. 8. In the speaker device 1, as shown in the figure, it is possible to
make the speaker unit 14 face the ear of the child MS by largely bending the helical tube 36 of
the support arm portion 16 downward. Therefore, in the speaker device 1, it is possible to use
adults MM to MS with compatibility.
[0053]
In the speaker device 1, when the reproduction signal output from the sound source is supplied
from the input unit 11 to the speaker unit 14 via the cord 18 conducted in the support arm
portion 16, the reproduction sound based on the reproduction signal is the speaker It is
reproduced by 13 and emitted from the sound emitting unit 13a. In the speaker device 1, as
described above, the speaker unit 14 inclines with respect to the sound emitting portion 13 a of
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the speaker 13 with respect to the surface direction and the diameter direction, and gradually
increases the diameter toward the sound emitting opening 24. The main reflector 21 is provided
on the housing 12 with an inclination. In the speaker device 1, the reproduction sound emitted
from the sound emitting unit 13 a is reflected by the main reflector 21 and emitted toward the
ear of the passenger M through the sound emission opening 24.
[0054]
In the speaker device 1, as described above, the speaker unit 14 has the arc-shaped side reflector
22 which constitutes a part of the outer peripheral portion between the opening 12 a of the
housing 12 and the main reflector 21. Become. In the speaker device 1, the side reflector 22
suppresses sound leakage to the periphery of the reproduction sound emitted from the speaker
13 and reflected by the main reflector 21 and holds a predetermined sound pressure toward the
passenger M. To be emitted efficiently.
[0055]
The speaker device 1 is installed by a simple retrofit operation for each seat 3, so that it is
possible to view the reproduced sound based on the reproduced signal from the sound source
individually selected by each passenger M. . In the speaker device 1, since the speaker unit 14 is
opposed to the ear of each passenger M by a simple operation, it is possible to view the
reproduced sound in an optimal state and to suppress a failure due to mutual sound leakage as
well. Be done. In the speaker device 1, the compatibility with the difference in body shape of the
passenger M is also extremely high, and even small children can use it. In the speaker device 1,
even if the passenger M may hit the speaker unit 14 when getting in and out, etc., the support
arm portion 16 is deformed to absorb the impact, whereby the attachment portion 15 is
damaged or broken, etc. Reduce the occurrence and secure the safety of the passenger M.
[0056]
By the way, in the speaker device 1, as described above, the speaker unit 14 is attached to the
opening 12 a of the housing 12 in a fixed state with the main reflector 21 via the side reflector
22. Further, in the speaker device 1, the mounting portion 15 is made detachable with respect to
the first headrest shaft 5 and the second headrest shaft 6, and a support arm portion 16 in which
the speaker unit 14 is provided to the mounting portion 15. Are configured to be removable.
10-05-2019
17
[0057]
In the speaker device 1, the main reflector 21 protruding from the housing 12 in an unused state
may be an obstacle. Further, in the speaker device 1, it is not necessary to perform removal by a
very simple operation in order to use the speaker device 1 while being attached to a certain seat
3. Rather, it may be considered to configure the attachment portion 15 more simply.
[0058]
The speaker device 40 shown as the second embodiment in FIG. 9 has the same basic
configuration as the speaker device 1 and copes with the above-mentioned improved points and
desired points. The speaker device 40 opens and closes the main reflector 46 through the side
reflector 47 with respect to the housing 45 and the mounting portion 41 having a simple
structure including the cylindrical mounting member 42 and the set bolt 43 as shown in the
figure. And an optional speaker unit 44. In the speaker device 40, the same parts as those of the
above-described speaker device 1 are denoted by the same reference numerals, and the detailed
description thereof is omitted.
[0059]
The first headrest shaft 5 and the second headrest shaft 6 make it possible to remove the
headrest 4 by pulling it out of the guide portion of the seat 3. After attaching the mounting
portion 41 to the first headrest shaft 5 or the second headrest shaft 6 pulled out of the seat 3,
the speaker device 40 inserts the first headrest shaft 5 and the second headrest shaft 6 into the
guide portion again. Installed on the seat 3 by
[0060]
The mounting member 42 is formed in a tubular shape by a synthetic resin material or a metal
material, and has a mounting hole 42 a having substantially the same diameter as the diameter of
the first headrest shaft 5 or the second headrest shaft 6. The mounting member 42 is formed
with a boss portion 42 b having a screw hole passing through the mounting hole 42 a at the
10-05-2019
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outer peripheral portion. The mounting member 42 is assembled by inserting the first headrest
shaft 5 or the second headrest shaft 6 extracted from the seat 3 from the tip thereof into the
mounting hole 42a. In addition, one end portion of a helical tube 36 constituting the support arm
portion 16 is fixed to the outer peripheral portion of the attachment member 42.
[0061]
The threaded portion of the set bolt 43 is screwed into the threaded hole of the boss portion 42b
in a state where the first headrest shaft 5 or the second headrest shaft 6 is inserted into the
mounting hole 42a. As the set bolt 43 is screwed in, the tip end portion abuts on the outer
periphery of the first headrest shaft 5 or the second headrest shaft 6 to attach the mounting
member 42 to the first headrest shaft 5 or the second headrest shaft 6. Fix it. The mounting
member 42 does not have a guide structure for the reproduction signal supply cord 18a because
the proximal end of the helical tube 36 is directly fixed to the outer periphery thereof. Therefore,
the reproduction signal supply code 18 a is drawn out from the extraction hole provided on the
outer peripheral portion of the helical tube 36.
[0062]
Also in the speaker unit 44, as shown in FIGS. 10 to 12, the housing 45 is generally formed in a
substantially cup shape with one side portion opened by a synthetic resin material, and a height
direction for attaching the speaker 13 inside A plurality of mounting bosses 48 having mounting
holes are integrally formed. In the housing 45, a first connection pipe member 37 is fixed to a
mounting hole formed in an outer peripheral portion, and the reproduction signal supply cord
18a connected to the speaker 13 via the first connection pipe member 37 is drawn out. .
[0063]
In the housing 45, as shown in FIG. 13, the outer peripheral portion is formed so as to be slightly
thick, and a step portion 49 is formed over the entire inner periphery of the opening 45a. The
stepped portion 49 has a height substantially equal to the thickness of the main reflector 46 and
is formed to have an inner diameter substantially equal to the outer diameter of the main
reflector 46. In the housing 45, a hinge recess 50 is formed on the inner peripheral edge of the
opening 45a so that the main reflector 46 can be freely opened and closed as described in detail
later. Axial holes 50 a and 50 b are formed in the side surfaces facing each other in the hinge
10-05-2019
19
recess 50. In the housing 45, a stopper projection 51 is formed on the inner peripheral edge of
the opening 45a so as to face the hinge recess 50 and project to the step 49.
[0064]
The housing 45 is formed with a guide slit 52 opened in the opening 45 a in the height direction.
The guide slit 52 is an arc-shaped slit having a circumferential length of approximately 1⁄2 of the
circumferential length of the opening 45a centering on the position facing the hinge recess 50,
as will be described in detail later. The side reflectors 47 move in and out. The guide slit 52 is
formed to have a length and an opening width substantially equal to the length and thickness of
the side reflector 47.
[0065]
As described above, the housing 45 is slightly complicated in which the step 49, the hinge recess
50, the stopper projection 51, and the guide slit 52 are formed in the opening 45a. For example,
when the thickness of the outer peripheral portion is regulated, There is also a scaly protruding
part. Therefore, the housing 45 may be configured by combining, for example, a cup-shaped
main body portion and a plate body in which the above-described portion is formed.
[0066]
The main reflector 46 is also formed in a substantially disk shape having an outer diameter and a
thickness substantially equal to the height and the inner diameter of the stepped portion 49 of
the housing 45 by a synthetic resin material or the like. In the main reflector 46, as shown in FIG.
14, a hinge convex portion 53 is integrally formed on an outer peripheral portion facing the
hinge concave portion 49 of the housing 45. As shown in FIG. The width of the hinge convex
portion 53 is formed to be substantially equal to the width of the hinge concave portion 50, and
the axial portions 53a and 53b are integrally formed on both side surfaces thereof so as to face
the axial holes 50a and 50b on the hinge concave 50 side. It is done. The main reflector 46 has
the same function as the main reflector 21 of the speaker device 1 described above in the state
where the opening 45 a of the housing 45 is opened, and therefore the description thereof is
omitted.
10-05-2019
20
[0067]
The main reflector 46 opens and closes the opening 45 a with respect to the housing 45 by
combining the hinge convex portion 53 in the hinge concave portion 50 and fitting the shaft
portions 53 a and 53 b in the opposing shaft holes 50 a and 50 b. To be combined. The main
reflector 46 is provided with rotational habitability in the direction of opening from the housing
45, for example, by assembling the torsion spring 54 to the shaft portions 53a, 53b. The main
reflector 46 may be provided with such rotational habitability by an elastic means such as a leaf
spring instead of the torsion spring 54.
[0068]
The main reflector 46 constitutes the lid of the housing 45 by the outer peripheral edge facing
the hinge convex portion 53 being locked by the stopper convex portion 51 in a state where the
opening 45 a of the housing 45 is closed. The main reflector 46 is housed in the step 49 as
shown in FIG. 12 to form a housing 45 without irregularities, and breakage due to catching or
the like is prevented.
[0069]
The main reflector 46 is turned by the elastic force of the torsion spring 54 and released from
the opening 45a as shown in FIG. The main reflector 46 is stopped at a predetermined angle with
respect to the housing 45 by the stopper structure, and the rotation operation is stopped to form
a sound emission opening 55 between the main reflector 46 and the opening 45a. Further, the
main reflector 46 is provided with, for example, a lock structure (not shown) with the housing
45, and is fixed in an open state at a predetermined angle defined by the stopper structure. The
sound emission opening 55 is configured to be equivalent to the sound emission opening 24 of
the speaker device 1 described above.
[0070]
Although the details of the stopper structure are omitted, for example, the stopper structure is
configured of an angle restriction structure formed on the hinge convex portion 53 and the
stopper convex portion 51 or an angle restriction structure formed on the side reflector 47 and
10-05-2019
21
the guide slit 51 described later. The main reflector 46 has, for example, the hinge convex
portion 53 formed in a cylindrical shape, and a support shaft is inserted through the shaft holes
50a and 50b of the hinge recess 50 on the housing 45 side and rotatably supported with respect
to the housing 45 It may be configured to be
[0071]
As shown in FIGS. 10 and 14, the main reflector 46 has a side reflector 47 integrally formed on
the inner surface thereof. As described above, the side reflector 47 is an arc-shaped convex
portion having a circumferential length of approximately 1⁄2 with respect to the length in the
circumferential direction of the main reflector 46 centering on the position facing the hinge
convex portion 53. The guide slit 52 formed in the housing 45 is formed to have a length and a
thickness substantially equal to the length and the opening width of the guide slit 52. The side
reflectors 47 are the same as the side reflectors 22 of the speaker device 1 described above, and
thus the description thereof is omitted.
[0072]
The side reflectors 47 are fitted in the guide slits 52 over the entire length when the main
reflector 46 is assembled to the housing 45. Even when the main reflector 46 is rotated at a
predetermined angle with respect to the housing 45 to open the opening 45a, as shown in FIG.
52 has a height to be held in a fitted state.
[0073]
As for the side reflector 47, the main reflector 46 is inclined with respect to the opening 45a of
the housing 45 with respect to the surface direction and the diameter direction as well as the
side reflector 22 of the speaker device 1 described above. It is integrally formed with the main
reflector 46 so as to be inclined so as to gradually increase the opening shape. Specifically, as
shown in FIG. 14, the side reflectors 47 are formed such that the side where the height is larger
than the hinge convex portion 53 is slightly longer. The side reflector 47 may have a bent
portion at its lower end, for example, and may constitute the above-described angle adjustment
structure by abutting with the lower end of the guide slit when the main reflector 46 is turned.
Good.
10-05-2019
22
[0074]
Although the speaker unit 44 is configured to rotatably combine the main reflector 46 with the
housing 45 by the above-described structure, it is a matter of course that the structure is not
limited to such a structure. The speaker unit 44 may be rotatably combined with the main
reflector 46 via, for example, a hinge portion integrally formed on the outer peripheral portion of
the housing 45. In the speaker unit 44, the housing 45 and the side reflector 47 may be provided
with a hinge structure, and the housing 45 may be rotatably combined with the main reflector 46
via the side reflector 47.
[0075]
In the speaker device 40, as described above, the speaker unit 44 is formed by rotatably
combining the main reflector 46 with the housing 45. In the speaker device 40, the main
reflector 46 which is combined with the housing 45 at a predetermined opening angle
constitutes the sound emission opening 55 so that the passenger M seated on the seat 3 is in a
good condition. The reproduced sound is emitted based on the reproduced signal output from
the sound source.
[0076]
In the speaker device 40, the main reflector 46 is accommodated in the housing 45 when the
main reflector 46 protruding from the housing 45 when not in use is an obstacle. In the speaker
device 40, the lock structure is released and the main reflector 46 is pushed toward the housing
45 against the elastic force of the torsion spring 54. In the speaker device 40, the main reflector
46 is accommodated in the step 49 and the outer peripheral edge is locked by the stopper
projection 51.
[0077]
By the way, in the speaker device 40, as in the speaker device 1, the speaker unit 44 directs the
sound emitting portion 13a of the speaker 13 to the front to reduce the projection area and
secure the side view of the passenger M. used. In the speaker device 40, the reproduction sound
10-05-2019
23
emitted from the speaker 13 by the main reflector 46 and the side reflector 47 is reflected to the
sound emission opening 55 side, and the sound emission portion 13a of the speaker 13 and the
both ears of the passenger M The sound pressure level characteristic is maintained by correcting
the deviation of the axis line of.
[0078]
In the speaker device 40, in order to further reduce the deviation of the axial line between the
sound emission opening 55 and the both ears of the passenger M, it is necessary to set the
opening angle of the main reflector 46 with respect to the housing 45 somewhat large. In the
speaker device 40, therefore, there is a limit to the reduction of the projection area of the
speaker unit 44, which lowers the side visibility characteristics of the passenger M, and also the
mechanical coupling strength of the main reflector 46 and the side reflector 47 with respect to
the housing 45. descend. In the speaker device 40, when the opening size of the sound emission
opening 55 is increased, the directivity of the reproduced sound is reduced.
[0079]
In the speaker device 40, when the opening angle of the main reflector 46 is reduced, the
direction of the reproduction sound reflected by the main reflector 46 and guided to the sound
emission opening 55 side becomes closer to the housing 45 side. Therefore, in the speaker
device 40, a part of the reproduced sound strikes the peripheral wall of the opening 45a facing
the hinge of the housing 45, so that the sound is trapped in the housing 45. In the speaker device
40, this may cause a decrease in sound pressure and a decrease in sound quality.
[0080]
The speaker device 60 shown in FIG. 15 as the third embodiment is basically a speaker unit 61 in
which one side portion of the main reflector 46 is rotatably combined by a hinge portion 63
whose details are omitted. This configuration is similar to that of the speaker device 40. The
speaker device 60 solves the above-described problem by the fixing structure of the speaker 13
described later, and is emitted from the sound emission opening 64 formed between the housing
62 and the main reflector 46 so as to face the hinge 63. The sound pressure characteristic and
the sound quality characteristic of the reproduction sound are improved.
10-05-2019
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[0081]
The speaker device 60 fixes the baffle plate 20 of the speaker 13 on a plurality of mounting
bosses 65 formed in the housing 62 as described later in detail, and has a feature in the fixing
structure of the speaker 13 . In addition, since the speaker apparatus 60 makes other structures
equivalent to the speaker apparatus 1 and the speaker apparatus 40 which were mentioned
above, description is abbreviate | omitted by attaching | subjecting a code | symbol same to a
corresponding site | part.
[0082]
The speaker device 60 is also attached to the first headrest shaft 5 and the second headrest shaft
6 that support the headrest 4 with respect to the seat 3 as described above, and the speaker unit
61 is placed at the ear of the passenger M sitting on the seat 3 Face each other. The speaker
device 60 also has a housing 62 which is formed in a substantially cup shape as a whole, with
one side surface portion opened by a synthetic resin material. In the speaker device 60 as well,
the main reflector 46 in which the side reflector 47 is integrated with the housing 62 by the
hinge portion 63 whose details are omitted by the speaker unit 61 is rotatably supported at one
side and faces the hinge portion 63 It comprises the sound emission opening part 64 opened on
the side surface side.
[0083]
In the speaker device 60, the opening angle of the sound emission opening 64, in other words,
the opening angle θ of the main reflector 46 with respect to the housing 61, is set smaller than
the opening angle of the speaker device 40 described above. As described above, the speaker
device 60 fixes the occurrence of the sound accumulation phenomenon in the housing 61 caused
by reducing the opening angle θ1 of the main reflector 46 by inclining the baffle plate 20
toward the sound emission opening 64 side. It is comprised so that it may be suppressed by
doing.
[0084]
10-05-2019
25
As described above, the housing 61 is integrally formed with a plurality of mounting bosses 65
for fixing the baffle plate 20 therein, but the mounting bosses 65 are formed at different heights.
That is, as shown in FIG. 15, the height of the housing 61 is higher than that of the mounting
boss 65b formed at the position closer to the sound emission opening 64, at the mounting boss
65a formed closer to the hinge 63 side. Is formed to be large.
[0085]
In the housing 61, the mounting portions formed on the outer peripheral portion of the baffle
plate 20 are respectively opposed to the mounting bosses 65, and the speaker 13 is
accommodated. The baffle plate 20 is attached to the attachment bosses 65 where the
attachment parts face each other, so that the baffle plate 20 is inclined downward in the forward
downward direction from the hinge 63 side, in other words, in the direction opposite to the
inclination direction It is housed and fixed in the housing 61 in a state of being inclined at the
angle θ2.
[0086]
In the speaker device 60, the inclination angle θ1 of the main reflector 46 is set small as
described above, but the main reflector 46 and the baffle plate are fixed by fixing the baffle plate
20 in the housing 62 with the inclination angle θ2 The opposing opening angle with 20 is θ1 +
θ2 = θ. Therefore, in the speaker device 60, the reproduction sound emitted from the baffle
plate 20 with an angle of θ2 is reflected by the main reflector 46 with a small inclination angle
θ1, and thus the angle equivalent to that of the speaker device 20 described above As a result,
sound is emitted from the sound emission opening 64. In the speaker device 60, the
reproduction sound is emitted from the sound emission opening 64 with the sound pressure
characteristics and the sound quality characteristics equivalent to the case where the main
reflector 46 is attached to the housing 62 at a large opening angle.
[0087]
In the speaker device 60, the plurality of mounting bosses 65 are integrally formed in the
housing 61 to fix the baffle plate 20 of the speaker 13. However, the present invention is not
limited to such a fixing structure. Of course. The housing 61 may have a step portion for
supporting the bottom surface of the baffle plate 20 over the entire circumference on the inner
10-05-2019
26
peripheral portion, and a mounting hole may be formed in the step portion to fix the baffle plate
20. Any structure may be used as long as the speaker 20 is housed and fixed by inclining 20.
[0088]
The structure in which the baffle plate 20 is inclined in the housing to store and fix the speaker
13 is also applied to, for example, the speaker device 1 shown as the first embodiment described
above in which the main reflector 21 is fixed to the housing 12 Be done. The speaker device 1
can also improve the sound pressure characteristic and the sound quality characteristic by
adopting such a structure.
[0089]
By the way, also in the speaker device 60 described above, a part of the reproduction sound
reflected by the main reflector 46 hits the outer peripheral portion of the housing 62 facing the
hinge portion 63, and the sound quality characteristics equivalent to the free sound emission can
not be obtained. The speaker device 70 shown as the fourth embodiment in FIGS. 16 and 17
follows the features of the above-described speaker device 60 and reduces the sound stagnation
phenomenon in the housing 72 of the speaker unit 71 to further improve the sound pressure
characteristics. And improve the sound quality characteristics. In the speaker device 70, for
example, in the usage mode where the passenger M listens to the reproduced sound at a
relatively small volume like background music, the reproduced sound can be listened without
opening the main reflector 46. Ru.
[0090]
The speaker device 70 is characterized in that a sub sound emission hole 73 is formed in a part
of the housing 72, and even when the main reflector 46 is closed by the sub sound emission hole
73, it is possible to view small volume playback sound. doing. The speaker device 70 is the same
as the speaker device 60 described above in the other configuration, and thus the description will
be omitted by attaching the same reference numerals to the corresponding parts.
[0091]
10-05-2019
27
The housing 72 is also rotatably combined with one side of the main reflector 46 integrally
formed with the side reflector 47 via a hinge portion. In the housing 72, sub sound emission
holes 73 formed of a plurality of through holes are formed on the outer peripheral wall facing
the hinge portion. The sub sound release holes 73 may be formed, for example, by subjecting the
formed housing 72 to post processing such as punching.
[0092]
In the speaker device 70, the main reflector 46 is opened relative to the housing 72 as shown in
FIG. In the speaker device 70, the reproduction sound emitted from the speaker 13 is reflected
by the main reflector 46 and emitted from the sound emission opening 64 toward the ear of the
passenger M. In the speaker device 70, a part of the reproduction sound reflected by the main
reflector 46 is emitted toward the inside of the housing 72, but the sound is stagnated by being
emitted outward through the sub sound emission hole 73. Is reduced. Therefore, the speaker
device 70 can be viewed by the passenger M in a good state by further improving the sound
pressure characteristic and the sound quality characteristic of the reproduced sound.
[0093]
Further, in the speaker device 70, for example, the main reflector 46 does not get in the way
when not in use, and the housing 72 is closed as shown in FIG. 17 in order to maintain the side
view etc. . In the speaker device 70, even in this state, if the reproduction of the reproduction
sound based on the reproduction signal is performed from the speaker 13, the reproduction
sound is emitted from the sub sound emission hole 73. In the speaker device 70, since the sub
sound emission holes 73 are provided on the outer peripheral portion of the housing 72 so as to
face the ears of the passenger M, the passenger M can sufficiently distinguish the reproduced
sound.
[0094]
In addition, although each embodiment mentioned above was installed and used for the seat 3 of
the motor vehicle 2, of course, it is not limited to such a use form. The speaker device is suitably
used in various vehicles having a seat provided with a headrest.
10-05-2019
28
[0095]
It is explanatory drawing of the use condition of the state which installed the speaker apparatus
shown as embodiment in each seat of a motor vehicle. It is a disassembled perspective view
showing a seat and a speaker apparatus. It is a front view of a speaker apparatus. It is a side view
of a speaker apparatus. It is a top view of an attachment member. It is a side view of an
attachment member. It is explanatory drawing of the use condition which the adult sat in the
seat. It is explanatory drawing of the use condition which the child sat down to the seat. It is a
perspective view of the speaker apparatus shown as a 2nd embodiment. It is a disassembled
sectional view of a speaker unit shown as a 2nd embodiment. It is a side view of the speaker unit
in the state which opened the main reflector. It is a side view of the speaker unit in the state
which closed the main reflector. It is a top view of the speaker unit of the state which removed
the main reflector. It is a bottom view of a main reflector. It is a partially cutaway side view of the
speaker unit shown as a 3rd embodiment. It is a front view of the state which opened the main
reflector of the speaker unit shown as 4th Embodiment. It is a front view of the speaker unit of
the state which closed the main reflector.
Explanation of sign
[0096]
Reference Signs List 1 speaker device, 2 car, 3 seat, 4 headrest, 5 first headrest shaft, 6 second
headrest shaft, 10 unit, 11 input portion, 12 housing, 12a opening portion, 13 speaker, 14
speaker unit, 15 mounting portion, DESCRIPTION OF SYMBOLS 16 support arm part, 17 case, 20
baffle plate, 21 main reflector, 22 side reflector, 24 sound emission opening part, 25 attachment
member, 30 headrest shaft fitting hole, 31 support arm attachment hole, 36 helical tube, 40
speaker apparatus , 41 mounting portion, 42 mounting member, 44 speaker unit, 45 housing, 46
main reflector, 47 side reflector, 48 mounting boss portion, 50 hinge recess, 52 guide slit, 53
hinge recess, 55 sound emitting opening, 60 speaker device , 61 speaker units, 62 Hougin , 63
hinge portions, 64 sound emitting opening 65 mounting boss portion, 70 a speaker device, 71 a
speaker unit, 72 housing, 73 sub sound output holes
10-05-2019
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