JP2005064643A - Speaker system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-channel speaker system wherein installation spaces for a plurality of speakers are reduced. <P>SOLUTION: In the speaker system of the multi-channel for supplying an acoustic signal respectively to a plurality of speakers including a pair of left right speakers, at least one speaker 3 in a pair of the left right speakers is arranged such that a partition wall 71 partitions the inside of the enclosure 7 into a main acoustic space S1 and a sub acoustic space S2, woofers 32 are located in the main acoustic space S1 and tweeters 31 are placed in the sub acoustic space S2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a multi-channel speaker system for supplying sound signals to a plurality of speakers including a pair of left and right speakers and causing each speaker to ring.

  Conventionally, as shown in FIG. 7, this type of speaker system has a center speaker (20) at the front center position of the listener, a left channel speaker (30) and a right channel speaker (40) at the front left and right, and a left channel at the rear left and right. A speaker (50) and a right channel speaker (60) are provided, and a subwoofer speaker (21) is provided at an arbitrary position (for example, the front right side), and the audio device (10) such as a DVD player is connected to these speakers. A multi-channel speaker system that supplies an acoustic signal is known (see Patent Documents 1 to 3).

The front left channel speaker (30), front right channel speaker (40), rear left channel speaker (50) and rear right channel speaker (60) are each equipped with a tweeter (31) (41) (51) (61) Has been.
For example, as shown in FIG. 8, the front left channel speaker (30) includes an enclosure (70) having a vertically long cylindrical shape, and maintains a posture in which the enclosure (70) stands at the lower end of the enclosure (70). A stand (80) is connected.
The tweeters (31) and (31) are installed inside the enclosure (70), and an amplifier (92) and a power circuit (93) for amplifying an acoustic signal to be supplied to the tweeters (31) and (31) are provided. A cord (33) that is housed and extends from the tweeters (31) and (31) extends through the enclosure (70) and is connected to the amplifier (92).

On the other hand, the subwoofer speaker (21) shown in FIG. 7 is a dedicated speaker that emits sound of a low frequency (for example, 100 Hz or less), and a 5.1 channel speaker system is configured together with the other five speakers. Has been.
The subwoofer speaker (21) has a lower directivity than other speakers, and can be installed at an arbitrary position.
JP-A-10-136498 [H04S5 / 02] JP 11-225400 A [H04S1 / 00] Utility Model Registration No. 3072057 Publication [H04R3 / 00]

  However, in the conventional 5.1-channel speaker system shown in FIG. 7, five speakers (20), (30), (40), (50), and (60) that carry five channels are arranged. Independently, the subwoofer speaker (21) having a relatively large enclosure has to be arranged, and there is a problem that a large installation space is required.

  In addition, although the subwoofer speaker (21) has a low directivity, it has a certain degree of directivity.However, depending on the steepness at the cutoff frequency of the filter characteristics, the mid-frequency sound with a high directivity is slightly output. Therefore, when the subwoofer speaker (21) is arranged on either the left or right side, there is a problem that the sound in the middle and low range is unbalanced left and right depending on the position of the subwoofer speaker (21).

Accordingly, an object of the present invention is to reduce the installation space for a plurality of speakers in a multi-channel speaker system.
It is a further object of the present invention to balance left and right sound in the mid-low range in a multi-channel speaker system.

  The speaker system according to the present invention is a multi-channel speaker system that supplies an acoustic signal to each of a plurality of speakers including at least a pair of left and right speakers (3) and (4) to cause each speaker to ring. Among the speakers (3) and (4), at least one of the speakers is divided into the main acoustic space S1 and the sub acoustic space S2 by the partition wall (71) inside the enclosure (7). A woofer (32) is provided, and a tweeter (31) is provided in the sub-acoustic space S2.

  The speaker system according to the present invention is a multi-channel speaker system for supplying an acoustic signal to each of a plurality of speakers including at least a pair of left and right speakers (3) and (4) to cause each speaker to sound. Each of the pair of speakers (3) and (4) is divided into a main acoustic space S1 and a sub acoustic space S2 by a partition wall (71) inside the enclosure (7), and a woofer is provided in the main acoustic space S1. A tweeter is provided in the sub acoustic space S2.

  Furthermore, the speaker system according to the present invention has a pair of left and right speakers (3) and (4) arranged at the front and a pair of left and right speakers (5) and (6) arranged at the rear, and these four speakers (3). (4) A multi-channel speaker system for supplying sound signals to (5) and (6) to cause each speaker to ring, wherein the four speakers (3), (4), (5) and (6) are respectively The interior of the enclosure (7) is partitioned into a main acoustic space S1 and a sub acoustic space S2 by a partition wall (71). A woofer is disposed in the main acoustic space S1, and a tweeter is disposed in the sub acoustic space S2. Yes.

In the speaker system of the present invention, a tweeter (31) and a woofer (32) are provided in an enclosure (7) of at least one speaker among a plurality of speakers, and the conventional speaker system is provided by the woofer (32). Therefore, it is not necessary to install a subwoofer speaker independently as in the prior art.
Here, since the main acoustic space S1 in which the woofer (32) is deployed and the sub acoustic space S2 in which the tweeter (31) is deployed are partitioned by the partition wall (71), the woofer (32) emits. The low-frequency sound generated and the middle-high frequency sound emitted from the tweeter (31) do not interfere with each other in the enclosure (7).

  In addition, according to the configuration in which a tweeter and a woofer are provided for each of the pair of left and right speakers (3) and (4), the filter characteristic of the woofer (32) is a little steep, and the mid-frequency sound is slightly low. Even if the sound is output to, the sound is output in the same way from the left and right woofers, so that the left and right balance is maintained.

In a specific configuration, the pair of left and right speakers each include an enclosure (7) having a vertically long cylindrical shape, and a stand (a stand for keeping the enclosure (7) in an upright position at the lower end of the enclosure (7)). 8) is connected, and a circuit for amplifying an acoustic signal to be supplied to the tweeter (31) and the woofer (32) is provided in the stand (8) of at least one of the pair of left and right speakers. A substrate (94) is installed.
In the specific configuration, an acoustic signal supplied from the outside is input to the circuit board (94) in the enclosure (7), amplified by the circuit board (94), and then tweeter (31) and woofer (32). ).

In another specific configuration, a metal bar (36) extending in the vertical direction is installed inside the enclosure (7), and the cord extends from at least one of the tweeter (31) and the woofer (32). The tip of (33a) is connected to the upper end of the metal rod (36), and the tip of the cord (33b) extending from the circuit board (94) is connected to the lower end of the metal rod (36).
According to the specific configuration, the acoustic signal output from the circuit board (94) is supplied to the tweeter (31) or the woofer (32) via the cord (33b), the metal rod (36), and the cord (33a). The Here, since the length of the cords (33a) and (33b) extending in the enclosure (7) is shortened by the length of the metal rod (36), the cord (33a) is generated by the sound wave generated in the enclosure (7). (33b) does not vibrate greatly.

In yet another specific configuration, the opening at the lower end of the enclosure (7) is closed by a lid member (76), and the main acoustic space S1 passes through a through hole formed in the lid member (76). A porous material (84) is installed at the outlet of the through hole, communicating with the sound emission openings (83) and (83) established in the stand (8).
According to the specific configuration, the sound wave in the enclosure (7) is emitted to the outside from the sound outlets (83) and (83) of the stand (8) through the through hole of the lid member (76). This constitutes a bass reflex type speaker. Here, since the porous material (84) is installed at the outlet of the through hole of the lid member (76), the generation of wind noise is suppressed.

  According to the speaker system of the present invention, instead of the conventional configuration in which the subwoofer speakers are independently installed, a configuration in which both the tweeter and the woofer are provided in a common enclosure is adopted, so that a plurality of speaker installation spaces are provided. Can be reduced. Further, by adopting the above configuration for each of the pair of left and right speakers, it is possible to balance the low-frequency sound left and right.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
As shown in FIG. 2, the speaker system according to the present invention has a center speaker (2) at the front center position, a front left channel speaker (3) and a front right channel speaker (4) at the front left and right, and a rear left channel speaker at the rear left and right. (5) and a rear right channel speaker (6) are arranged, and an acoustic signal is supplied to each of these speakers from an audio device (1) such as a DVD player.

Here, the front left channel speaker (3) includes a tweeter (31) (31) and a woofer (32) (32), and the front right channel speaker (4) includes a tweeter (41) (41) and a tweeter (41) (41). The woofers (32) and (42) constitute a subwoofer in the conventional speaker system, and therefore the conventional independent subwoofer speaker is omitted.
On the other hand, the rear left channel speaker (5) and the rear right channel speaker (6) have tweeters (51) and (61), respectively, and have the same configuration as in the prior art.

As shown in FIG. 1, the front left channel speaker (3) has a vertically long cylindrical enclosure (7), and the lower end of the enclosure (7) holds the enclosure (7) in an upright position. A stand (8) is connected.
The enclosure (7) is provided with a partition wall (71) surrounding the tweeters (31) (31), and the interior of the enclosure (7) is the main acoustic space S1 for the woofers (32) (32) and the tweeter. (31) It is divided into sub acoustic spaces S2 for (31).
The enclosure (7) is provided with a duct (75) that leads from the main acoustic space S1 to the outside, and constitutes a bass reflex type speaker for the woofers (32) and (32).

A power supply circuit (91) and an amplifier (9) for amplifying an acoustic signal to be supplied to the tweeters (31) (31) and the woofers (32) (32) are arranged inside the stand (8). (9) is connected to the tweeters (31), (31) and the woofers (32), (32) via the cord (33).
On the other hand, the front right channel speaker (4) has an enclosure (7) and a stand (8) having the same shape as the front left channel speaker (3), and the stand (8) has a power circuit. (91) and amplifier (9) are not built in. This is because the right channel sound signal from the audio device (1) is once supplied to the front left channel speaker (3) and amplified by the amplifier (9) of the speaker (3), and then the right channel speaker (4). This is because the configuration supplied to) is adopted.

  Further, in the specific configuration of the front left channel speaker (3), the cord (33) extending from the tweeter (31) (31) passes through the slit (72) provided in the partition wall (71) as shown in FIG. It passes between the first locking wall portion (73) and the second locking wall portion (74) integrally formed with the partition wall (71), and further extends toward the amplifier (9).

As shown in FIG. 4, a metal rod (36) extending vertically is attached to the inner wall of the enclosure (7), and the tip of the cord (33a) extending from the tweeters (31) (31) is connected to the upper end of the metal rod (36). And the tip of the cord (33b) extending from the amplifier (9) is connected to the lower end of the metal rod (36) to connect the tweeters (31) (31) and the amplifier (9). The structure which aims at can be employ | adopted.
According to this configuration, since the entire length of the cords (33a) and (33b) is shortened by the length of the metal rod (36), the cords (33a) and (33b) receive the sound waves generated in the enclosure (7). Does not vibrate greatly.

As shown in FIG. 5, the stand (8) is constituted by a housing opened downward, and an insertion port (86) is opened on the upper surface of the stand (8), and the enclosure (7) is inserted into the insertion port (86). The proximal end is inserted. The lower opening of the enclosure (7) is closed by a lid member (76), and the lid member (76) is attached to the enclosure (7) using L-shaped metal fittings (79) and screws (87). It is fixed.
A duct (77) is connected to the lid member (76) to form an outlet for sound waves generated in the main acoustic space S1, and a bass reflex type speaker is configured with the duct (75).

A frame (81) is provided inside the stand (8), and an upper end portion of the frame (81) is connected to an upper wall of the stand (8) using screws (87). A circuit board (94) is fixed to the lower end of the frame (81) using screws (87). The circuit board (94) is provided with a plurality of circuit components (95) and connectors (96) constituting the power supply circuit (91) and the amplifier (9), and the connector (96) includes the tweeter ( 31) and the tip of the cord (33) extending from the woofer (32) are connected.
The lid member (76) has a slit (78) for allowing the cord (33) to pass therethrough.

A bottom plate (82) is fixed to the lower opening of the stand (8) using screws (87). The bottom plate (82) has a plurality of legs (85) and (85) projecting downward, and a plurality of sound emission ports (83) and (83).
In addition, the outlet of the duct (77) of the lid member (76) is filled with a porous material (84) between the bottom plate (82), and sound waves are emitted from the duct (77). The generation of wind noise during the operation is prevented.

In the speaker (3), the sound waves generated in the main acoustic space S1 by the sound of the woofer (32) are emitted from the enclosure (7) into the stand (8) through the duct (77), and further the porous material ( After passing through 84), it is discharged to the outside from the plurality of sound emission openings (83) and (83) of the bottom plate (82).
As far as the connection structure of the enclosure (7) and the stand (8) is concerned, the front right channel speaker (4), the rear left channel speaker (5) and the rear right channel speaker (6) shown in FIG. doing.

According to the speaker system of the present invention shown in FIG. 2, the tweeters (31), (41) and the woofers (32), (42) are respectively provided in the front left channel speaker (3) and the front right channel speaker (4). Since the subwoofer in the conventional speaker system is constituted by the woofers (32) and (42), it is not necessary to install the subwoofer speakers independently as in the prior art. This reduces the speaker installation space.
Even if the filter characteristics of the woofers (32) and (42) are a little steep, and the mid-frequency sound is slightly output, the sound is the same from the left and right woofers (32) and (42). Therefore, the left and right balance is maintained.

  Here, as shown in FIG. 1, the main acoustic space S1 in which the woofers (32) and (32) in the enclosure (7) are arranged and the sub acoustic space S2 in which the tweeters (31) and (31) are arranged are defined. Since it is partitioned by the partition wall (71), the low frequency sound emitted from the woofers (32) and (32) and the middle and high frequency sound emitted from the tweeters (31) and (31) interfere with each other in the enclosure (7). Never do.

Furthermore, in the speaker structure shown in FIG. 5, since the stand unit having the circuit board (94) built in the stand (8) is configured, the stand (8) is removed from the enclosure (7) together with the circuit board (94). It can be exchanged for another stand (8) incorporating a circuit board (94) with different specifications. Thus, for example, when changing the specifications of the power supply circuit and the amplifier, a speaker system according to various specifications can be realized by replacing the stand unit according to the new specifications.
In a speaker system in which the circuit board (94) is built in the left channel speaker (3) and the circuit board (94) is not built in the right channel speaker (4), the enclosure (7) is formed by both speakers (3) and (4). ) Can be a common specification.

  Furthermore, in the manufacturing process of a plurality of types of speakers having different specifications, the enclosure (7) is manufactured on a common line, and a power supply circuit (91) and an amplifier (9) according to the specifications are supplied to the enclosure (7). Multiple models of speakers can be manufactured by connecting a stand (8) incorporating a).

  In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. For example, in the speaker system shown in FIG. 2, a pair of front left and right speakers (3) and (4) are provided with woofers (32) and (42), respectively. (5) Use a configuration in which woofers (32) and (42) are deployed in (6) and a configuration in which woofers are deployed in all four speakers (3), (4), (5), and (6), respectively. Is also possible.

  In addition, as shown in FIG. 6, an auxiliary board (97) is attached in the enclosure (7), and the tip of the cord (33) is connected to a connector (98) provided on the auxiliary board (97). By connecting the male connector (90) provided on the board (97) and the female connector (99) provided on the circuit board (94) in the stand (8) to each other, the cord (33) and the circuit board ( It is also possible to adopt a configuration that achieves connection 94). According to this configuration, the female connector (99) on the circuit board (94) is connected to the male connector (90) on the auxiliary board (97) by assembling the stand (8) to the enclosure (7). Therefore, a special operation for connecting the cord (33) to the circuit board (94) is not required, and the assembly process is simplified.

It is sectional drawing which shows the fundamental structure of the speaker which concerns on this invention. 1 is a perspective view showing a configuration of a speaker system according to the present invention. It is sectional drawing which shows the structure for pulling out a code | cord | chord from a partition wall. It is a side view which shows the structure for preventing the vibration of a code | cord | chord. It is sectional drawing which shows the structure of the connection part of an enclosure and a stand. It is a side view which shows the other structure for connecting a code | cord | chord to a circuit board. It is a perspective view which shows the structure of the conventional speaker system. It is sectional drawing of the conventional speaker.

Explanation of symbols

(1) Audio device
(2) Center speaker
(3) Front left channel speaker
(31) Tweeter
(32) Woofer
(33) Code
(36) Metal rod
(4) Front right channel speaker
(5) Rear left channel speaker
(6) Rear right channel speaker
(7) Enclosure
(71) Partition wall
(8) Stand
(81) Frame
(82) Bottom plate
(83) Sound outlet
(84) Porous material
(9) Amplifier
(91) Power circuit
(94) Circuit board
(95) Circuit parts

Claims (6)

  In a multi-channel speaker system that supplies an acoustic signal to each of a plurality of speakers including at least a pair of left and right speakers (3) and (4) to cause each speaker to ring, of the pair of left and right speakers (3) and (4), In at least one of the speakers, the enclosure (7) is partitioned into a main acoustic space S1 and a sub acoustic space S2 by a partition wall (71), and a woofer (32) is provided in the main acoustic space S1, A speaker system, wherein a tweeter (31) is provided in the sub-acoustic space S2.   In a multi-channel speaker system for supplying sound signals to a plurality of speakers including at least a pair of left and right speakers (3) and (4) to cause each speaker to ring, the pair of left and right speakers (3) and (4) are respectively The interior of the enclosure (7) is partitioned into a main acoustic space S1 and a sub acoustic space S2 by a partition wall (71). A woofer is disposed in the main acoustic space S1, and a tweeter is disposed in the sub acoustic space S2. A speaker system.   A pair of left and right speakers (3) and (4) are arranged in the front and a pair of left and right speakers (5) and (6) are arranged in the rear, and the four speakers (3), (4), (5) and (6) are moved to. In the multi-channel speaker system for supplying sound signals and causing each speaker to ring, each of the four speakers (3), (4), (5), and (6) has a partition wall (71) inside the enclosure (7). Is divided into a main acoustic space S1 and a sub acoustic space S2, a woofer is disposed in the main acoustic space S1, and a tweeter is disposed in the sub acoustic space S2.   Each of the pair of left and right speakers includes an enclosure (7) having a vertically long cylindrical shape, and a stand (8) for keeping the enclosure (7) in an upright posture is connected to a lower end portion of the enclosure (7). A circuit board (94) for amplifying an acoustic signal to be supplied to the tweeter (31) and the woofer (32) is provided in at least one speaker stand (8) of the pair of left and right speakers. The speaker system according to any one of claims 1 to 3, wherein the speaker system is installed.   A metal rod (36) extending in the vertical direction is installed inside the enclosure (7), and the tip of the cord (33a) extending from at least one of the tweeter (31) and the woofer (32) is a metal rod ( The speaker system according to claim 4, wherein the speaker system is connected to the upper end of 36) and the tip of the cord (33b) extending from the circuit board (94) is connected to the lower end of the metal rod (36).   The opening at the lower end of the enclosure (7) is closed by a lid member (76), and the main acoustic space S1 is opened to the stand (8) through a through hole opened in the lid member (76). The speaker system according to claim 4, wherein a porous material (84) is provided at the outlet of the through hole so as to communicate with the sound ports (83) and (83).

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