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JP2001275186

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DESCRIPTION JP2001275186
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
storage mechanism for an external speaker of a portable audio device.
[0002]
2. Description of the Related Art Conventionally, when a speaker unit is generally combined with
a portable audio device, the portable audio device and the portable audio device are generally
used in a state where the speaker unit is oriented in an arbitrary direction. Prepared a separate
external speaker box, and was configured to be able to direct the speaker box in the direction
desired by the user.
[0003]
In this conventional arrangement, the external speaker box is not designed to be stored in the
portable audio device, so the external speaker box must be carried along with the portable audio
device. There is a problem that it is not possible to make full use of the original features of the
portable audio device that it is convenient to carry.
In addition, although a portable audio device in which a speaker box is integrated with a portable
audio device has been proposed, in this case, the portable audio device becomes large and there
is a problem that it is inconvenient in carrying.
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1
[0004]
A portable audio device according to the present invention is provided on a side surface of a
casing of the portable audio device, and has ball joint fitting means having a shape in which one
end is open to the outside of the casing. A support shaft having a ball joint at one end and an
acoustic driver at the other end, and a speaker means comprising the acoustic driver and a flat
diaphragm attached to the acoustic driver, the ball joint being a ball joint The speaker means is
configured to be movable between the upper surface portion and the lower surface portion of the
housing portion by being fitted to the fitting portion so that the speaker means can be
accommodated on the lower surface portion side. .
[0005]
In the portable audio apparatus according to claim 1 of the present invention, the diaphragm of
the speaker unit is formed of a flat diaphragm, and is easily accommodated on the lower surface
side of the housing. It is convenient when carrying around this portable audio device, and when
playing music etc. using this portable audio device, this speaker is optional, centering on this ball
joint. Music and the like can be played back and listened to in the direction of
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be
described below with reference to the drawings.
1 to 6 show an example of the embodiment of the present invention, and a compact disc
reproducing apparatus (hereinafter referred to as a "CD reproducing apparatus") showing an
example of a portable audio apparatus.
Applied to the As another specific example of the portable audio apparatus, for example, a mini
disc recording / reproducing apparatus (MD), a compact cassette recording / reproducing
apparatus, a digital audio tape recording / reproducing apparatus (DAT) and the like can be
mentioned.
[0007]
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2
First, the main part of the configuration of the CD reproducing apparatus will be described. FIG. 1
is a diagram showing the CD reproducing apparatus as viewed from the top side, and FIG. 2 is a
diagram showing the CD reproducing apparatus as viewed from the bottom side.
[0008]
In FIG. 1 and FIG. 2, 1 shows a CD reproducing apparatus, and the housing of the CD reproducing
apparatus 1 is formed by the upper surface 2, lower surface 3, right side 4, left side 5, front 6
and rear 7 There is.
[0009]
The upper surface 2 and the lower surface 3 of the housing communicate with each other, and
the right corner of the back surface 7 has a shape cut into the inside from the back surface 7,
and the ball joint fitting portion is formed on the bottom surface The groove 9A has a shape in
which the upper surface 2 and the lower surface 3 are communicated with each other, and the
shape cut into the inside from the back surface 7 at the left corner of the back surface 7 Another
split groove portion 8B is provided in this housing, and has a ball joint fitting portion 9 formed
on the bottom surface thereof.
[0010]
Next, an example of a speaker unit and an attachment structure of the speaker unit to a housing
will be described with reference to FIGS. 1 to 3.
Note that FIG. 3 is an explanatory view seen from the direction indicated by the section E-E in
FIG. 2, and in this explanatory view, the same reference numerals are given to the same parts as
FIG. 1 and FIG. .
[0011]
In FIG. 1 to FIG. 3, 12A indicates the main part of the speaker section, and a flat diaphragm
speaker is constituted by the diaphragm 13 and the acoustic driver 14 which are substantially
circular thin plate shaped and molded of hard plastic material. The speaker portion 12A is
configured by the flat diaphragm speaker and the support shaft 16 having the ball joint 15 at
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3
one end and the acoustic driver 14 attached at the other end.
The acoustic driver 14 can drive the diaphragm 13 in a state of being attached to the diaphragm
13 at a position decentered from the center position of the diaphragm 13.
[0012]
Also, this acoustic driver 14 is not a conventional acoustic driver that gives the diaphragm a
motion (so-called piston movement) to vibrate the diaphragm in the direction of extension of the
central axis of the acoustic driver. An acoustic driver is used that causes the diaphragm 13 to
generate an inclined vibration that causes the diaphragm to tilt to the left and right.
[0013]
In this example, by using an acoustic driver which generates such an acoustic signal by causing
such a tilt vibration to be generated in the diaphragm 13 as the acoustic driver 14, it is attached
when the diaphragm 13 is driven by the acoustic driver. Reduce the mechanical vibration in the
direction to make the reproduction state of the disc unstable in the CD reproduction device 1 and
stabilize the reproduction state of the disk in the CD reproduction device 1, so-called "sound
jump" generation It is intended to reduce the
[0014]
Further, the ball joint 15 of the speaker unit 12A is rotatable about the virtual axis indicated by
the two-dot chain line 17A in FIG. 3 and the side of the upper surface 2 in the direction indicated
by the two-dot chain line 17B. It is supported by the ball joint fitting portion 9 in a state where it
can be turned toward both the lower surface portion 3 side.
[0015]
As shown in FIGS. 2 and 3, the lower surface 3 of the housing is provided at a position where the
support shaft 16 can be stored when the speaker 12A is turned toward the lower surface 3. First
storage comprising a first groove 22 and a first recess 23 provided at a position where the
acoustic driver 14 can be stored and a first diaphragm storage part 24 provided at a position
where the diaphragm 13 can be stored A unit 20 is provided.
[0016]
Further, in the CD reproducing apparatus 1 shown and described with reference to FIGS. 1 and 2,
a pair of flat diaphragm speakers are provided in the CD reproducing apparatus 1 when
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performing three-dimensional sound reproduction or the like.
[0017]
Next, in the case where the pair of flat diaphragm speakers are provided in the CD reproducing
apparatus 1 in this manner, the same reference numerals are given to the same parts as in FIG. 1
to FIG. An example is shown and demonstrated.
[0018]
That is, a flat diaphragm speaker is constituted by the diaphragm 13 and the acoustic driver 14
which are formed in a substantially circular thin plate shape and made of a hard plastic material,
and this flat diaphragm speaker has the ball joint 15 at one end. The other groove part which
provided this ball joint 15 of the speaker part 12B comprised by the support shaft 16 to which
this acoustic driver 14 was attached to the other end side in the back surface part 7 side by the
side of the left side 5 of CD reproducing apparatus By fitting the ball joint fitting portion 9 of 8B,
as shown in FIG. 4, the CD reproducing apparatus 1 can be configured to have the pair of
speakers 12A and 12B.
[0019]
Then, assuming that the speaker unit 12B is provided in the CD reproducing apparatus 1 or in
the case where it is provided, as shown in FIG. When the second groove portion 26 is provided at
a position where the support shaft 16 can be accommodated, the second recess 27 provided at
the position where the acoustic driver 14 can be accommodated, and the position where the
diaphragm 13 can be accommodated. A second storage unit 25 including the provided second
diaphragm storage unit 28 is provided.
[0020]
Further, in the example shown and described in each of FIGS. 1 to 4, each of the ball joints 15 is
engaged with the ball joint fitting portion in a state where a suitable friction is given between the
ball joint fitting portion 9 and the ball joint 15. The usability is improved by fitting each of the
speaker sections 12A and 12B to the CD playback apparatus so that the speaker sections 12A
and 12B can stand still at a desired angle and a desired position.
[0021]
Next, with respect to an example of the configuration in which the loading slot of the disc is
provided in the CD reproducing apparatus 1, the same parts as those in FIGS. 1 to 3 are given the
same reference numerals and the detailed description is omitted. Refer to the description.
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5
[0022]
The CD playback apparatus 1 is provided with a loading slot 18 for loading and unloading the
disc as shown in FIG. 5 in the front part 6 of the CD playback apparatus 1, and is incorporated in
the CD playback apparatus 1 through the slot 18. Opening and closing operation of the opening
and closing lid as in the case where the opening and closing lid for loading and unloading the
disc is provided on the CD reproducing apparatus 1 so that the disc can be loaded and unloaded.
It is configured to facilitate loading and unloading of the disc without the need for
[0023]
Further, in the CD reproducing apparatus 1, as shown in FIG. 5, a leg 19 is provided at a position
close to the central part of the back surface 7 of the lower surface 3, and the CD reproducing
apparatus 1 is used on a table In this state, with the convex surface 3A of the lower surface
portion 3 of the CD reproducing apparatus 1 in contact with the table, this placed state of the CD
reproducing apparatus 1 is configured to be stable.
[0024]
Next, with reference to FIG. 6, the same parts as in FIG. 1 to FIG. 5 are assigned the same
reference numerals and detailed explanation thereof is omitted, and from the diaphragm 13 and
acoustic driver provided in each of the speaker parts 12A and 12B. The shape of the storage
portion for storing the speaker in the lower surface portion 3 will be described.
6 is an explanatory view of the CD reproducing apparatus 1 in the direction shown by the section
G-G in FIG.
[0025]
As shown in FIG. 6, with respect to the position of the bottom surface 28A of the second
diaphragm housing portion 28, this first diaphragm is an inclined surface cut down from the
right side surface 4 side toward the bottom surface 28A side. The bottom surface 24A of the
housing portion 24 is formed, and the housing portion is formed in a shape in which the step 29
is formed in a portion where the bottom surface 24A and the bottom surface 28A are adjacent to
each other.
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6
[0026]
That is, the bottom surface 24A is formed to be inclined in this manner, and a step 29 is provided
between the first diaphragm housing portion 24 and the second diaphragm housing portion 28
as shown by a two-dot chain line in FIG. Thus, the respective diaphragms 13 housed in the first
diaphragm housing portion 24 and the second diaphragm housing portion 28 can be housed in a
partially overlapped state without interfering with each other. The area required for this storage
is made smaller than the area occupied by the pair of diaphragms 13, and the compactness of the
CD reproducing apparatus 1 is achieved.
[0027]
Further, since the bottom surface 24A is formed to be inclined in this manner, it is not necessary
to make the speaker portions 12A and 12B into different shapes and sizes only for the purpose
of being stored in these storage portions.
[0028]
In FIG. 2, reference numeral 21 denotes a strap whose one end is engaged with the back surface
7 of the lower surface 3 so as to be convenient when carrying the CD reproducing apparatus 1.
[0029]
Further, a woofer (so-called super woofer), which is a speaker exclusively for reproducing a bass
region, is provided on the inner side of the lower surface 3 in the portion indicated by the
alternate long and short dash line 11 in the lower surface 3 in FIG. It is incorporated in the state
which approached the lower surface part 3 side, and was made to approach.
Therefore, when the CD reproducing apparatus 1 is placed on a tabletop and the convex surface
3A of the lower surface 3 is brought into contact with the tabletop, it is possible to efficiently
reproduce the sound in the bass region as a baffle boat. Thus, the low frequency reproduced
sound from the speaker units 12A and 12B is compensated.
[0030]
According to the portable audio apparatus of the present invention, the diaphragm of the speaker
is a flat diaphragm, so that the portable audio apparatus has a large thickness. The speaker can
be stored without using it, and when playing music etc. using a portable audio device, the
speaker can be easily pulled out and the playback sound can be listened to in any direction. The
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effect of being able to
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