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JPH0678388

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH0678388
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
loudspeaker apparatus, and more particularly to a loudspeaker apparatus comprising a
combination of a bass speaker and a treble or mid-high tone speaker, which is suitable for use as
an on-vehicle loudspeaker. .
[0002]
2. Description of the Related Art An in-vehicle speaker apparatus generally used to listen to
music or the like in a car has been designed to use a combination of a bass speaker and a high or
middle pitch speaker. Since the pair of speakers are fixed together, the directivity of the speakers
is not always in the best state depending on the listening position of the listener.
[0003]
In view of such problems, Japanese Utility Model Laid-Open Publication No. 54-103832 discloses
a coaxial type speaker device in which the direction of the high-tone speaker disposed inside the
cone of the bass speaker is variably adjusted. Proposed.
[0004]
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1
SUMMARY OF THE INVENTION In the coaxial type speaker device proposed by Japanese Utility
Model Laid-Open No. 54-103832, in order to adjust the direction of the high-tone speaker, a
person manually adjusts the angle of the speaker by hand. I had to do it.
Therefore, when driving at a position far from this speaker, there is a problem that it is not
possible to adjust the directivity of Sbika arbitrarily. In addition, even when the listener's
listening position is changed, it is necessary to arbitrarily change the directivity of the high-tone
speaker accordingly, and the operation is very troublesome.
[0005]
The present invention has been made in view of such problems, and in particular, it is an object
of the present invention to provide a speaker device which can change the directivity of a hightone or low-pitch speaker from a separated position. It is said that.
[0006]
According to a first aspect of the present invention, in a region in front of a bass speaker and
inside the outermost periphery of a cone of the bass speaker, the central axis of the bass speaker
is substantially orthogonal to the central axis of the bass speaker. The present invention relates
to a speaker apparatus characterized by disposing a high or middle high / low pitch speaker
rotatably around an axis and providing a drive means for rotating the high or low / high pitch
speaker around the axis. It is a thing.
[0007]
In the second invention according to the first invention, the high or low-tone speaker and the
driving means are attached to a frame of the bass speaker or a protective grille mounted in front
of the bass speaker The present invention relates to a speaker apparatus characterized in that.
[0008]
According to the first invention, by operating the remote control switch or the remote
commander, the drive means rotates the high or low-tone speaker so that the direction of the
speaker can be set in any direction. It is possible to make variable adjustments.
[0009]
In the second aspect of the present invention, since the high or low-tone speaker and the driving
means are attached to the frame of the low-pitch speaker or the protective grille, the high-
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2
pitched sound can be provided without providing any special support means. Or, it becomes
possible to attach so that the direction of the speaker for middle and high tone can be variably
adjusted.
[0010]
1 and 2 show a speaker apparatus according to an embodiment of the present invention.
This speaker device is used as a vehicle-mounted speaker.
An outer peripheral side of the low frequency speaker 10 is constituted by a frame 11, and a
driving portion yoke 12 is fixed to a rear end side of the frame 11.
Further, a cone 13 constituting a diaphragm is disposed inside the frame 11, and a center cap 14
is attached to a central portion of the cone 13.
[0011]
A high-tone speaker 18 is disposed inside the cone 13 of the bass speaker 10.
An outer peripheral side of the speaker 18 is constituted by a frame 19 and a drive unit yoke 20
is attached to a rear end thereof.
Further, a pair of brackets 21 is attached at positions offset by 180 ° on the outer peripheral
side of the frame 19. The bracket 21 has a substantially L-shaped cross section, and the rotary
support shaft 22 is embedded on the bracket 21. A worm gear 23 is fixed to one of the support
shafts 22. The worm gear 23 meshes with the worm 24. The worm 24 is fixed to the output shaft
of the DC motor 25.
[0012]
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3
A frame 29 is provided to support the high-pitched speaker 18. The frame 29 is formed by
bending a wire, and a mounting plate 30 is attached to both ends thereof. The mounting plate 30
is fixed to the portion of the flange 33 of the speaker grille 32 of the bass speaker 10 by a screw
31.
[0013]
A pair of bearing plates 35 are fixed to the frame 29 so as to be positioned outside the bracket
21 of the high-tone speaker 18. Shaft holes 36 are formed in the bearing plate 35, and these
shaft holes 36 receive the rotary support shafts 22 projecting on both sides of the high-tone
speaker 18 so that the high-tone speaker 18 can be used as the bass speaker 10. It is rotatably
supported about an axis orthogonal to the central axis. A motor mounting plate 37 is connected
to one bearing plate 35, and the DC motor 25 is supported by the motor mounting plate 37.
[0014]
Next, the remote control switch 40 for controlling the rotation from the position away from the
DC motor 25 will be described. As shown in FIG. 2, the remote control switch 40 comprises a
sliding plate 41 on the positive side and a sliding plate 42 on the negative side. Each has its own.
The sliding plates 41 and 42 are adapted to selectively contact the forward rotation contact 43,
the reverse rotation contact 44, and the stop contact 45, respectively. Furthermore, the sliding
plates 41 and 42 are always in contact with the output contact 46. A battery 47 is connected to
both ends of the forward rotation contact 43 and the reverse rotation contact 44.
[0015]
In the configuration described above, when the remote control switch 40 is in the state shown in
FIG. 2, the sliding plates 41 and 42 are in contact with the stop contact 45, so the motor 25 is
not powered on and is in a stationary state. It is in. Therefore, the high-pitched speaker 18 is not
rotationally driven, and remains directed in a predetermined direction. The worm 24 and the
worm gear 23 prevent the high-pitched speaker 18 from rotating, and the speaker 18 is held at
that angle.
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[0016]
When the sliding plates 41 and 42 of the remote control switch 40 are moved leftward, the
sliding plates 41 and 42 contact the normal rotation contact 43 so that the battery 47 contacts
the normal rotation contact 43, the sliding plate 41, The current flows in the positive direction to
the motor 25 through the output contacts 46 and the output contact 46. Then, the worm 24 is
driven by the motor 25 and the worm gear 23 is slowly rotated. As a result, the rotary support
shaft 22 securing the worm gear 23 is rotated. That is, the high-pitched speaker 18 changes its
direction in the positive direction about the axis of the rotation support shaft 22.
[0017]
When the sliding plates 41 and 42 of the remote control switch 40 are moved to the right in FIG.
Will flow, and the DC motor 25 will reverse direction. Therefore, in this case, the high-pitched
speaker 18 is rotated in the reverse direction about the rotation support shaft 22, that is, in the
opposite direction to the above. In addition, the rotation of the motor 25 is slowly rotated by the
worm 24 and the worm gear 23 to be decelerated and rotated.
[0018]
Even from such a remote position, the remote control switch 40 can arbitrarily adjust the
direction of the high-tone speaker 18.
[0019]
The speaker device according to the present embodiment can be rotated by the remote control
switch 40 shown in FIG. 2 via the motor 25, worm 24, and worm gear 23, thereby making the
speaker 18 centered on the rotation support shaft 22 of the high-tone speaker 18. And adjust
this speaker 18 to the desired angle of the listener.
Therefore, the high-pitched speaker 18 can be easily adjusted to a desired position by the seating
position inside the vehicle. Moreover, since this speaker device is a coaxial speaker in which the
high-tone speaker 18 is disposed inside the cone 13 of the bass speaker 10, it can be compactly
installed without taking up a space.
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5
[0020]
Although the present invention has been described above with reference to an embodiment
shown in the drawings, the present invention is not limited to the above embodiment, and
various modifications can be made based on the technical concept of the present invention. For
example, although the remote control switch 40 is used to change the direction of the high-tone
speaker 18 in the above embodiment, the direction of the high-tone speaker 18 may be changed
using a remote commander. Further, instead of the high-tone speaker 18, the middle-high-tone
speaker may be disposed inside the low-tone speaker 10, and the angle thereof may be adjusted.
In the above embodiment, although the high-tone speaker 18 is attached to the low-tone speaker
10 through the grille 32 of the low-tone speaker 10, the frame 26 supporting the high-tone
speaker 18 is the frame 11 of the low-tone speaker 10. It may be attached to the part of the
flange on the front end side of.
[0021]
According to the first aspect of the present invention, the high-tone or medium-high-tone speaker
is disposed inside the cone of the low-pitch speaker so as to be rotatable about an axis
substantially orthogonal to the central axis of the low-pitch speaker The high or low-tone speaker
is rotated by the driving means.
[0022]
Therefore, by operating the remote control means such as the remote control switch, it becomes
possible to rotate the high or low-pitched speaker to any angle, and to direct the high- or midhigh pitched speaker in the direction optimum to the position of the listener It becomes possible
to match the position of the listener with the directivity of the speaker.
Moreover, it becomes possible to carry out the remote control without carrying out such an
operation by hand.
[0023]
According to a second aspect of the present invention, the high-tone or medium-high-tone
speaker and the driving means are attached to the frame of the low-pitched speaker or the
protective grille thereof.
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[0024]
Therefore, it is possible to make the speaker apparatus compact without requiring a special
means for attaching the high or low-tone speaker and the drive means.
[0025]
Brief description of the drawings
[0026]
1 is an exploded perspective view of a speaker device according to an embodiment of the present
invention.
[0027]
2 is the same longitudinal sectional view.
[0028]
Explanation of sign
[0029]
DESCRIPTION OF SYMBOLS 10 Bass speaker 11 Frame 12 Drive unit yoke 13 Cone 14 Center
cap 18 Loudspeaker speaker 19 Frame 20 Drive unit yoke 21 Bracket 22 Rotation support shaft
23 Worm gear 24 Worm 25 DC motor 29 Frame 30 Mounting plate 31 Screw 32 Speaker grille
33 Flange 35 bearing plate 36 shaft hole 37 motor mounting plate 40 remote control switch 41,
42 sliding plate 43 forward rotation contact 44 reverse rotation contact 45 stop contact 46
output contact 47 battery
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