JP2001169376A - Acoustic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an acoustic device by which wiring and mounting of a speaker are not required. SOLUTION: An acoustic space 5 is formed in an acoustic device main body 1, and a cylinder section 2 that is formed to be telescopic by concentrically placing nodes 2A, 2B, 2C whose diameters are stepwise reduced is placed to a left side of a front panel section 1A of the acoustic device main body 1 and a speaker 7 is placed in the acoustic space 5 while its front side is directed to the cylinder section 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette, an MD
The present invention relates to an audio device that reproduces music recorded on a music source such as a (mini-disc) and a CD (compact disc), converts an audio signal output from a radio or the like into an audible sound, and outputs the sound.

[0002]

2. Description of the Related Art FIG. 6 is a plan view of the interior of a vehicle showing the arrangement of a center speaker installed as an auxiliary speaker of a conventional on-vehicle acoustic device. In this figure, 30 is a driver's seat, 31 is a passenger seat, 32 is a rear seat, 33 is a sound device installed on a console panel, 34 and 35 are front speakers, 36 and 37 are rear speakers, and 38 is a sound device 33.
Is a center speaker connected to a wiring 39.

[0003] A center speaker 38 is arranged at a substantially central position of the front speakers 34 and 35, and vocal sounds and the like are audibly received by the front speakers 34 and 35.
It is intended to be heard from a substantially central position of the. The center speakers 38 are front speakers 34 and 35.
Is installed on a dashboard or the like in the vehicle at a substantially central position, and is connected to the acoustic device 33 by a wiring 39.

[0004]

However, in the conventional acoustic device, it is necessary to connect the center speaker to a separately mounted acoustic device in the vehicle by wiring and to attach it to a place such as a dashboard. . Even when the center speaker is not used, it is necessary to install at least one speaker such as a front speaker or a rear speaker in order to hear a sound, and it is necessary to wire and attach the speakers.

[0005] The present invention has been made in view of the above points, and an object of the present invention is to provide an audio device that can eliminate the need for wiring and mounting of a speaker.

[0006]

An acoustic device according to the present invention forms an acoustic space together with an acoustic device main body, a tubular portion provided on a front panel of the acoustic device main body so as to be extendable and retractable, and a wall surface of the tubular portion. A partition plate, a speaker provided on the partition plate, to which an audio signal is supplied from an audio output circuit in the audio device main body, and a first through hole located in front of the speaker and having a first through hole formed therein. A first diffuser plate, and a second diffuser plate provided in the cylindrical portion in front of the first diffuser plate and having a second through-hole formed therein, wherein the first diffuser plate and the second diffuser plate are provided. At least one of the two diffuser plates rotates about the direction of expansion and contraction of the cylindrical portion as an axis, and the relative position between the first through hole and the second through hole changes.

[0007] According to this configuration, since the speaker is provided in the apparatus main body, there is no need to use another speaker, and it is possible to save the work of mounting and wiring the speaker. When another speaker is used, a high-quality sound can be output together with the speaker, or a different sound can be output. It should be noted that the term “sound” includes not only voice but also sound such as music that can be recognized by hearing. In addition, by rotating at least one of the first diffuser plate and the second diffuser plate, the first diffuser plate is rotated.
By changing the relative position between the through hole and the second through hole, the characteristics of the sound quality can be changed.

Further, according to the acoustic device of the present invention, in the above-mentioned acoustic device, the tubular portion is rotatable, and the second diffuser plate is fixed to the tubular portion. The second diffuser plate rotates.

Further, in the acoustic device according to the present invention, in the above-described acoustic device, the cylindrical portion is formed by a plurality of nodes whose relative positions change by rotating, and the first diffuser plate and the second diffuser are formed. A diffuser plate and a diffuser plate are provided at different nodes of the cylindrical portion.

[0010] In the acoustic device of the present invention, the partition plate is provided in the cylindrical portion.

Further, in the acoustic device of the present invention, a speaker provided on the partition plate is used as a center speaker.

Further, in the acoustic device according to the present invention, in the above-mentioned acoustic device, the main body of the acoustic device is a vehicle-mounted acoustic device.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The gist of the present invention is that a speaker is provided on a partition plate in the main body of an audio apparatus, and an audio signal is supplied to the speaker from an audio output circuit.

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are perspective views showing the appearance of an acoustic device according to an embodiment of the present invention, FIG. 3 is a longitudinal sectional view of FIG. 1, and FIG. 4 is a longitudinal sectional view of FIG.

An acoustic device according to this embodiment includes an acoustic device main body 1, a tubular portion 2 provided on a front panel 1A of the acoustic device main body 1 so as to be extendable and contractible, and an acoustic space 5 together with a wall surface of the tubular portion 2. And a speaker 7 provided on the partition plate 6 and supplied with an audio signal from an audio output circuit (not shown) in the audio device main body 1. The speaker 7 is located in front of the speaker 7 and has a first position. A first diffuser plate 3 having a through hole formed therein, and a second diffuser plate 4 provided in the cylindrical portion 2 in front of the first diffuser plate 3 and having a second through hole formed therein. And at least one of the first diffuser plate 3 and the second diffuser plate 4 rotates about the direction of expansion and contraction of the cylindrical portion 2 as an axis, and the relative position between the first through hole and the second through hole. Is changed.

FIG. 1 shows a state in which the cylindrical portion 2 is contracted, and FIG. 2 shows a state in which it is expanded. In the acoustic device according to this embodiment, the cylindrical portion 2 is connected to the acoustic device main body 1.
Is arranged on the left side of the front panel 1A.

As shown in FIG. 5 (a), the first diffuser plate 3 and the second diffuser plate 4 are each formed in a disk shape, and a circular hole h1 is formed at each peripheral edge. 8 holes are formed at regular intervals along the direction.
Four rectangular holes h2 each having an outer side longer than the inner side are formed at regular intervals along the circumferential direction inside 1. In this case, the diameter of the first diffuser plate 3 is larger than the diameter of the second diffuser plate 4 by the thickness of the cylindrical portion 2. The holes h1 and h2 are formed at the same position.

As shown in FIG. 5B, the first diffuser plate 3 and the second diffuser plate 4 are rotated by rotating the cylinders 2B and 2C when the cylinder portion 2 expands and contracts. The relative positions of the holes h1 and h2 of the third diffuser plate and the holes h1 and h2 of the second diffuser plate 4 are changed, thereby changing the sound quality characteristics.

The expansion / contraction operation of the cylindrical portion 2 is performed by a motor 8 (see FIG. 3 or FIG. 4) provided in the audio device main body 1. The control of the motor 8 is performed by a control circuit using an operation switch provided on the front panel 1A (both operation switches and the control circuit are not shown). The multi-stage feeding mechanism in the cylindrical portion 2 is described in, for example,
This is substantially the same as that employed in a camera equipped with a zoom lens disclosed in Japanese Patent Application Publication No. 8-208, and a detailed description of the mechanism is omitted here.

An audio player main body 1 is provided with an MD player 9 for reproducing an MD (mini-disc), a display unit (not shown), a control circuit, an audio output circuit, and the like. The display unit displays an operation state (play, stop, skip, etc.) of the MD player 9. In addition,
When the audio apparatus main body 1 is equipped with a radio, a display such as a frequency is also performed.

The speaker 7 is connected to an audio output circuit (not shown) in the audio apparatus main body 1 by a wiring member. By using this speaker 7 as a center speaker together with another speaker (not shown), a sound effect full of a sense of reality can be obtained. In addition, it is possible to listen to a radio broadcast while listening to music, for example, by making the speaker 7 emit a sound of a source different from that of the other speakers. Of course, the speaker 7 may be used alone. The speaker 7 is preferably a full-range speaker capable of covering from a low frequency range to a high frequency range.

As described above, according to the acoustic device of this embodiment, since the speaker 7 is provided in the acoustic device main body 1, there is no need to use another speaker, and the work of attaching and wiring the speaker can be omitted. it can. If you ask a contractor for wiring and installation work, installation labor will be incurred and costs will increase, but this is not the case. Also,
When another speaker is used, high-quality sound can be output or a different sound can be output in combination with the speaker.

Further, since the speaker 7 can be used as a center speaker, the appearance is not deteriorated by retrofitting the center speaker. In addition, since the first diffuser plate 3 and the second diffuser plate 4 are provided in the cylindrical portion 2 to change the relative positions of the respective through holes when the cylindrical portion 2 expands and contracts, the sound quality characteristics can be changed. Can be.

In the acoustic device according to this embodiment, the tube portion 2 is composed of three tubes 2A, 2B, and 2C. However, the number of the tubes is not limited. It may be. Further, in the acoustic device according to this embodiment, the two diffuser plates 3 and 4 are provided in the cylindrical portion 2, but the number is not limited, and may be determined appropriately according to the number of the cylindrical portions 2. Further, all the holes formed in each diffuser plate do not have to have the same shape. The number of holes may be one or more for each diffuser plate. However, in the case of one piece, if they are formed at the same position in a perfect circle, they will not intersect.

Although only one speaker is provided in the audio device according to this embodiment, music can be enjoyed in stereo by adding another speaker. In the audio device according to the first embodiment, only the CD player 6 is mounted. Alternatively, a cassette player or an MD (mini-disc) player may be mounted. It may be mounted.

[0026]

As described above, according to the present invention,
Since the speaker is provided in the audio device main body, it is not necessary to use another speaker, and the mounting and wiring work of the speaker can be omitted. If you ask a contractor for wiring and installation work, installation labor will be incurred and costs will increase, but this is not the case.

When another speaker is used, a high-quality sound or a different sound can be output in combination with the speaker. In addition, since the speaker provided in the apparatus main body can be used as the center speaker, there is no expense for mounting a new center speaker and no deterioration in appearance due to retrofitting.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of an acoustic device according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing an appearance of the acoustic device according to the first embodiment.

FIG. 3 is a longitudinal sectional view of FIG. 1;

FIG. 4 is a longitudinal sectional view of FIG. 2;

FIG. 5 is a plan view showing a diffuser plate of the acoustic device according to the first embodiment.

FIG. 6 is a plan view showing a center speaker arrangement state of a conventional acoustic device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Acoustic apparatus main body 1A Front panel part 2 Cylindrical part 2A, 2B, 2C cylinder 3, 4 Diffuser plate 5 Acoustic space 6 Partition plate 7 Speaker 8 Motor 9 MD player

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takuyuki Miyazawa 4-3-1 Tsunashimahigashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture F-term in Matsushita Communication Industrial Co., Ltd. 5D017 AE22

Claims (6)

[Claims] 1. An acoustic device main body, a tubular portion provided on a front panel portion of the acoustic device main body so as to be extendable and retractable, a partition plate forming an acoustic space together with a wall surface of the tubular portion, and provided on the partition plate. A speaker to which an audio signal is supplied from an audio output circuit in the audio device main body, a first diffuser plate located in front of the speaker and having a first through hole formed therein, and the first diffuser A second diffuser plate provided in the cylindrical portion in front of the plate and having a second through hole formed therein, wherein at least one of the first diffuser plate and the second diffuser plate is provided in the cylindrical portion. An acoustic device, wherein the relative position between the first through-hole and the second through-hole is changed by rotating about the expansion / contraction direction of the shaft. 2. The method according to claim 1, wherein the cylindrical portion is rotatable, the second diffuser plate is fixed to the cylindrical portion, and the second diffuser plate rotates according to the rotation of the cylindrical portion. The acoustic device according to claim 1, wherein 3. The cylindrical part is formed of a plurality of nodes that rotate and their relative positions change, and the first diffuser plate and the second diffuser plate are connected to different nodes of the cylindrical part. The acoustic device according to claim 1, wherein the acoustic device is provided. 4. The acoustic device according to claim 3, wherein said partition plate is provided on said cylindrical portion. 5. The audio device according to claim 1, wherein a speaker provided on the partition plate is used as a center speaker. 6. The audio device according to claim 1, wherein the audio device main body is a vehicle-mounted audio device.