JP2770436B2 - Speaker - Google Patents

Description

The present invention relates to, for example, a stereo, radio cassette recorder,
The present invention relates to a speaker used for car audio and the like.

2. Description of the Related Art Conventionally, in the field of sound reproduction, in addition to reproduction of sound quality, reproduction of a space as a sound field has been demanded. In recent years, technology has been developed also in sound reproduction in a narrow space such as a vehicle interior. (For example, see Japanese Patent Publication No. 63-173500).

Problems to be Solved by the Invention Vocal band (300Hz or more) with conventional speaker technology
In a space where it is difficult to provide a small speaker that reproduces the sound and the speaker arrangement is limited, such as in a vehicle cabin, a speaker for reproducing a monaural signal is arranged in front of the center between two seats so that a stereo image is sacrificed. The problem is that the sound image localization in the vocal band is affected by the speaker for low-pitched sound reproduction in order to localize the sound in front of the eyes, and to arrange a tweeter unit that reproduces the high frequency range by multi-arranging it, so that the sound localization in the vocal band is affected. Had.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a speaker capable of reproducing a vocal band in a small size and further capable of reproducing a stereo signal with a single speaker. It is intended to provide a speaker capable of reproducing a stereo sound field.

Means for Solving the Problems In order to solve the above problems, a speaker of the present invention comprises a rectangular or elliptical frame, and an edge between diaphragms divided into two parts at a longitudinal center fixed to the frame via an edge. A pair of diaphragms connected with each other, each voice coil coupled to each of the pair of diaphragms,
Each magnetic circuit fixed to the frame provided with a magnetic gap into which each voice coil fits,
A wall or a separator fixed to the frame and attached to the frame is provided on the front surface at the center in the longitudinal direction of the pair of diaphragms.

Operation With the above configuration, a small-sized speaker capable of reproducing a vocal band and capable of reproducing a stereo signal with a single speaker is provided, and excellent stereo is provided even in a narrow space where the speaker arrangement is limited. A speaker capable of reproducing a sound field can be provided.

First, before describing an embodiment of the present invention, an improvement example leading to the present invention will be described with reference to FIG.

FIG. 1 is a sectional view of a speaker in an improvement example,
1 is a frame, 2 is an edge, 3 is a diaphragm, 4 is an edge between diaphragms, 5 is a voice coil, 6 is a dust cap, 7 is a suspension, 8 is a top plate, 9 is a magnet, 10 is a plate with a center pole, 11 is Kinshi Line, 12
Is a terminal, 13 is a magnetic gap, and 14 is a magnetic circuit.

The diaphragm 3 includes two diaphragms having a shape divided into two at the center in the longitudinal direction, and an edge 4 between diaphragms such as cloth or urethane.
Which is connected to the frame 1 via the edge 2 as one diaphragm. Diaphragm 3
The voice coil 5 is connected to each of the divided voice coils, and a dust cap 6 is connected to the diaphragm side of the voice coil 5.
Is connected to the frame 1 via a suspension 7. The top plate 8, magnet 9, and plate 10 with center pole are combined to form a concentric magnetic gap.
A magnetic circuit 14 having a magnetic circuit 13 is formed, and the magnetic circuit 14 is coupled to the frame 1 at a position where each voice coil 5 enters the magnetic air gap 13. Further, a tinsel wire 11 electrically connected to the voice coil 5 is connected to a terminal 12 attached to the frame 1 to constitute a speaker.

In the above configuration, the diaphragm 3 is divided at the center in the longitudinal direction, and each of the divided vibration surfaces can independently vibrate at a high frequency. Stereo reproduction is possible with this speaker. Further, the diaphragm 3 has two divided pieces joined together by an edge 4 between the diaphragms.
When the same signal is input, the same operation as a single rigid body is performed at a low frequency, so that the lowest resonance frequency can be kept low, so that the same signal on the left and right such as vocal can be reproduced. .

As described above, according to the present improvement example, a pair of diaphragms 3 in which a speaker is divided into two parts in a rectangular or elliptical frame 1 at the center in the longitudinal direction and connected by diaphragm edges 4 such as cloth or urethane are clothed. Alternatively, the diaphragm 3 is fixed via the edge 2 of urethane or the like, and each of the diaphragms 3 has a voice coil 5.
Fix two magnetic circuits 14 that fit into the frame 1
By adopting a configuration in which different signals can be input to each voice coil 5, it is possible to reproduce a vocal band in a small size,
Further, it is possible to provide a speaker capable of reproducing a stereo signal with one speaker.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a sectional view of a speaker according to one embodiment of the present invention, wherein 1 is a frame, 2 is an edge, 3 is a diaphragm, 4 is an edge between diaphragms, 5 is a voice coil, 6 is a dust cap, and 7 is Suspension, 8 is a top plate, 9 is a magnet, 10 is a plate with a center pole, 11 is a tinsel wire, 12 is a terminal, 13 is a magnetic gap, 14 is a magnetic circuit, 15
Is a separator.

The diaphragm 3 includes two diaphragms having a shape divided into two at the center in the longitudinal direction, and an edge 4 between diaphragms such as cloth or urethane.
Which is connected to the frame 1 via the edge 2 as one diaphragm. Diaphragm 3
The voice coil 5 is connected to each of the divided voice coils. A dust cap 6 is connected to the diaphragm side of the voice coil 5. Each voice coil 5 is connected to the frame 1 via a suspension 7. Is joined to. The top plate 8, the magnet 9, and the plate 10 with a center pole are combined to form a magnetic circuit 14 having a concentric magnetic gap 13. The magnetic circuit 14 is provided at a position where each voice coil 5 enters the magnetic gap 13. Connected to one. Further, tinsel wires 11 electrically connected to the voice coil 5 are connected to terminals 12 attached to the frame 1 respectively. Further, a loudspeaker is formed by connecting a separator 15 formed of resin, metal, or the like to a frame at a position above the edge 4 between the diaphragms.

In the above configuration, the diaphragm 3 has two divided pieces joined together by the inter-diaphragm edge 4, and when the same signal is input to each voice coil 5, a low frequency is equal to one rigid body. Since the lowest resonance frequency can be kept low for operation, it is possible to reproduce the same signal on the left and right, such as vocals, and the diaphragm 3 is divided at the center in the longitudinal direction. In addition, since each vibrating surface can independently vibrate at a high frequency, stereo reproduction can be performed with one speaker for a high frequency range of a stereo signal, and a high frequency range signal reproduced separately is not an improvement example. By providing the separated separator 15, the wraparound to the opposing vibrating surface side which is separated is reduced, and the independence of stereo signal reproduction can be increased.

As described above, according to the present embodiment, a pair of diaphragms 3 divided into two at the center in the longitudinal direction and connected by the edges 4 between diaphragms such as cloth or urethane are attached to the rectangular or elliptical frame 1 as cloth or urethane. The voice coil 5 is connected to each of the diaphragms 3, and two magnetic circuits 14 in which the respective voice coils 5 fit into the magnetic gaps 13 are fixed to the frame. By providing a structure in which different signals can be input to the voice coil 5 and providing a separator 15 on the upper surface of the inter-diaphragm edge 4, a small and vocal band can be reproduced, and a stereo signal can be reproduced with a single speaker. It is possible to provide a speaker with good separation at the time.

Instead of the separator 15, a wall may be provided on the mounting body on which the speaker is mounted.

Hereinafter, another embodiment of the present invention will be described with reference to FIG.

FIG. 3 shows an arrangement of the speakers. One example of the arrangement of the speakers in the cabin, which is a narrow space in which the arrangement of the speakers with respect to the listening point is asymmetric, is 20.
21 is a front left seat, 22 is a right side main speaker, 23 is a left side main speaker, 24 is a center speaker using the speaker of the present invention shown in FIG. 2, 25 is a right channel men-in audio signal, and 26 is a left channel A main audio signal, 27 is a left channel auxiliary audio signal, and 28 is a right channel auxiliary audio signal.

As for the audio signal for the front right seat 20, the right channel main audio signal 25 is supplied from the right side main speaker 22 and the left channel components 26 and 27 are supplied from the left side main speaker 23 and the right half of the center speaker 24. A symmetrical sound field can be provided for a sound field narrow to the right and wide to the left of the reproduced sound field of only 22,23.

The audio signal for the front left seat 21 is the right channel component
25 and 28 are the right side main speaker 22 and center speaker 24
The left channel component 27 is supplied from the left side main-in speaker 23, and the left and right main speakers 23 and 22 are provided only in the left and right main speakers 23 and 22 in the reproduction sound field which is wide to the right and narrow to the left as in the case of the front right seat 20. On the other hand, a symmetrical sound field can be provided.

As described above, according to the present invention, for a sound field in which there are a plurality of listening points in a narrow space such as a vehicle interior and the reproduced sound field is biased, By arranging the loudspeaker as the center loudspeaker 24 on the center line between the listening points, it is possible to provide a loudspeaker device capable of realizing a good stereo sound field such as vocal localization at each seat.

 Further, another embodiment of the present invention will be described with reference to FIG.

FIG. 4 shows an arrangement of speakers according to another embodiment of the present invention, which is an example of arrangement of speakers in a wide acoustic space on the left and right where a plurality of listening points are present, where 30 is a right listening point, and 31 is a center. A listening point, 32 is a left listening point, 33 is a right channel reproducing main speaker, 34 is a left channel reproducing main speaker, 35 is a right / center center speaker using the speaker of FIG. 2 of the present invention, and 36 is a main speaker. Center speaker between left and center using the speaker of the invention, 37 is a right channel main audio signal for each listening point, 38 is a left channel main audio signal for each listening point, 39 is a left channel auxiliary audio signal for a right listening point, 40 , 41 are a right channel auxiliary audio signal and a left channel auxiliary audio signal for the center listening point, respectively, and 42 is a right channel auxiliary audio signal for the left listening point.

Similarly to the embodiment shown in FIG. 3, the audio signal for the right listening point 30 is supplied with the left channel audio signal 39 by the right half of the center speaker 35 in addition to the main speakers 33 and 34, and is widely biased to the left. The sound field can be reproduced symmetrically. Similarly, for the left listening point 32, in addition to the audio signals from the main speakers 33 and 34, the center speaker 36
The right channel audio signal 42 is supplied from the left half of the sound field, and the sound field which has been widely biased to the right can be reproduced symmetrically. Further, for the center listening point 31, in addition to the signals of the main speakers 33 and 34, the right and left half planes of the center speakers 35 and 36 respectively supply the right channel audio signal 40 and the left channel audio signal 41 from the left and right sides. It is possible to provide a good stereo sound field by compensating for the center of the sound field that is too wide and the center part is missing.

As described above, according to the present invention, for a sound field in which a reproduced sound field in a wide acoustic space on the left and right where a plurality of listening points are present is deviated, the speaker of the present invention is used as a center speaker for the listening point. It is possible to provide a speaker device capable of realizing a good stereo sound field in which a vocal or the like is localized at each listening point by arranging the loudspeakers on the center line.

Effect of the Invention As described above, the present invention provides a rectangular or elliptical frame in which a pair of diaphragms divided into two at the center in the longitudinal direction and connected by an edge between diaphragms such as cloth or urethane are connected to an edge of cloth or urethane. A voice coil is coupled to each of the diaphragms, and two magnetic circuits in which each voice coil fits in a magnetic gap are fixed to a frame, and different signals can be input to each voice coil. As a result, it is possible to provide a small-sized speaker capable of reproducing a vocal band and further capable of reproducing a stereo signal with a single speaker, and to provide a small-sized speaker by providing a separator on an upper surface of an edge between diaphragms. Thus, it is possible to provide a speaker having good separation during stereo reproduction.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a speaker in an improved example up to the present invention, FIG. 2 is a cross-sectional view of a speaker in one embodiment of the present invention, and FIG. 3 is an asymmetric narrow space using the speaker of the present invention. FIG. 4 is a layout diagram of a speaker device in a certain cabin, and FIG. 4 is a layout diagram of a speaker device in a wide left and right acoustic space where a plurality of listening points exist using the speaker of the present invention. 1 ... frame, 2 ... edge, 3 ... diaphragm, 4 ...
Edge between diaphragms, 5: Voice coil, 6: Dust cap, 7: Suspension, 8: Top plate, 9: Magnet, 10: Plate with center pole, 11: Kinshi wire, 12 ... Terminal, 13: Magnetic gap, 14: Magnetic circuit, 15: Separator, 20: Front right seat, 21: Front left seat, 22: Right main speaker, 23: Left main speaker , 24 ... center speaker, 25 ... right channel main audio signal, 26 ... left channel main audio signal, 27 ... left channel auxiliary audio signal, 28 ... right channel auxiliary audio signal, 30 ..., right listening point , 31 ... Center listening point, 32 ... Left listening point, 33 ... Main speaker for right channel playback, 34 ... Main speaker for left channel playback, 35 ... Center speaker between right and center, 36 ... Left Center-to-center center speed 37, right channel main audio signal, 38 left channel main audio signal, 39 left channel auxiliary audio signal for right listening point, 40 right channel auxiliary audio signal for center listening point, 41 central listening Left channel auxiliary audio signal for point, 42... Right channel auxiliary audio signal for left listening point.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 48-95625 (JP, U) JP-A 1-74694 (JP, U) JP-A 36-31223 (JP, Y1) (58) Field (Int.Cl. ⁶ , DB name) H04R 1/40 310 H04R 5/02 H04R 9/06

Claims (1)

(57) [Claims] 1. A rectangular or elliptical frame, a pair of diaphragms fixed to the frame via an edge and divided into two parts at the center in the longitudinal direction and connected by edges between the diaphragms, and the pair of diaphragms Each voice coil coupled to each of the above, each magnetic circuit fixed to the frame provided with a magnetic gap in which the respective voice coil fits, and a front surface at the longitudinal center of the pair of diaphragms A speaker comprising a wall or a separator fixed to the frame and acoustically attached to the frame.