JP2001169375A - 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: 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 the left of an operation panel section 1A of an acoustic device main body 1, and a speaker 3 is mounted at the tip of the node 2C having the minimum diameter.

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. 13 is a plan view showing the arrangement of a center speaker installed as an auxiliary speaker in 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]

According to the present invention, there is provided an audio apparatus, comprising: an audio apparatus main body; a speaker to which an audio signal is supplied from an audio output circuit in the audio apparatus main body; A speaker tube is provided on the front panel of the device body so as to be extendable and contractible.

According to this configuration, since the speaker is provided in the audio apparatus main body, there is no need to use another speaker, and the mounting and wiring work of the speaker can be omitted. 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.

Further, in the acoustic device according to the present invention, in the above-described acoustic device, the speaker tube portion includes a plurality of nodes.

The sound device of the present invention, in the above sound device, is a partition plate which forms an acoustic space together with the speaker tube portion behind the speaker, and a speaker tube provided on a peripheral wall surface covering the acoustic space. And a bass reflex port that opens when the part is extended.

With this configuration, the bass reflex port is opened when the speaker tube is extended, so that low-frequency sounds can be emphasized.

Further, the sound device of the present invention is provided such that a partition plate which forms an acoustic space together with the speaker tube portion behind the speaker, and which is provided on a peripheral wall surface which covers the acoustic space, shrinks the speaker tube portion. And a bass reflex port that is open to the outside.

According to this configuration, when the speaker tube is contracted, the bass reflex port is closed, so that only direct sound from the speaker is produced. Therefore, sound characteristics can be properly used by expanding / contracting the speaker tube. For example, when listening to music, the sound is expanded to have a sound characteristic close to the full range, and when listening to human voice such as news, the sound is contracted to obtain a sound characteristic in the middle and high frequency range. When not in use, by shrinking the speaker tube, it is possible to prevent dust and the like from entering the audio device main body through the bass reflex port.

Further, in the acoustic device according to the present invention, in the acoustic device, the bass reflex port is provided in the speaker tube.

Further, in the acoustic device according to the present invention, in the acoustic device, the bass reflex port is provided on the front panel portion.

Further, in the acoustic device according to the present invention, in the above-mentioned acoustic device, the directivity direction of the speaker is inclined with respect to a direction in which the speaker tube expands and contracts, and the speaker tube rotates about the expansion and contraction direction as an axis.

According to this configuration, by rotating the speaker tube, the directivity direction of the speaker changes, so that the directivity of the sound can be set to a desired position.

Further, in the acoustic device according to the present invention, in the above acoustic device, the speaker 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 audio device.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIGS. 1 and 2 show Embodiment 1 of the present invention.
It is a perspective view which shows the external appearance of the acoustic device which concerns on FIG. The acoustic device according to the first embodiment includes a speaker tube portion 2 which is arranged coaxially with cylindrical node portions 2A, 2B, and 2C whose diameters are reduced stepwise and which can be expanded and contracted. And a speaker 3 attached to the tip of the node 2C having the minimum diameter.

FIG. 1 shows a state where the speaker tube 2 is contracted, and FIG. 2 shows a state where the speaker tube 2 is expanded.
FIG. 3 is a longitudinal sectional view of FIG. 1 when contracted, and FIG. 4 is a longitudinal sectional view of FIG. 2 when extended. In the acoustic device according to the first embodiment, the speaker tube 2 is disposed on the left side of the operation panel 1A of the acoustic device main body 1.

The expansion and contraction operation of the speaker tube portion 2 is performed by a motor 4 provided in the audio device main body 1. The control of the motor 4 is performed by a control circuit by an operation switch provided on the operation panel section 1A (both operation switches and the control circuit are not shown). The multi-stage feeding mechanism in the speaker tube portion 2 is substantially the same as that used in a camera equipped with a zoom lens disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 7-199028. Is omitted.

The audio apparatus main body 1 includes an MD player 5 for reproducing an MD (mini-disc), a display unit, a control circuit, a sound output circuit, and the like (not shown). The display unit (not shown) displays the operation state (play, stop, skip, etc.) of the MD player 5.
In addition, when the audio device main body 1 is equipped with a radio, a display such as a frequency is also performed.

The loudspeaker 3 is made up of the acoustic device body 1 by a wiring material.
Connected to an audio output circuit (not shown). By using this speaker 3 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 causing the speaker 3 to emit a sound of a different source from the other speakers. Of course, the speaker 3 may be used alone. The speaker 3 is preferably a full-range speaker that can cover from a low frequency range to a high frequency range.

As described above, according to the acoustic device according to the first embodiment, since the speaker 3 is provided in the audio device main body 1, there is no need to use another speaker, and the mounting and wiring work of the speaker can be omitted. Can be. 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 3 can be used as a center speaker, the appearance is not deteriorated by retrofitting the center speaker.

In the acoustic device according to the first embodiment, the speaker tube 2 has three nodes 2A, 2B, and 2C. However, the number of nodes of the slide tube is not limited. , Or less or more. In addition, although each of the joints 2A, 2B, and 2C has a cylindrical shape, it is not limited to the cylindrical shape but may be, for example, a cylinder having a polygonal cross section as long as it can slide back and forth. In addition, the audio device according to the first embodiment includes only the MD player 5, but may include a CD player or a cassette player, or may include a plurality of these devices. There may be.

(Embodiment 2) FIG. 5 is a perspective view showing an appearance of an acoustic device according to Embodiment 2 of the present invention, and FIG. 6 is a longitudinal sectional view of FIG. The acoustic device according to the second embodiment is a modified example of the acoustic device according to the first embodiment, in which the distal end of the node 2C having the minimum diameter of the speaker tube 2 is cut obliquely to tilt the speaker 3. It was attached in the state where it was made to be made. In this way, when the nodes 2A, 2B, 2C of the speaker tube 2 are extended, the speaker 3 rotates, thereby changing the directivity of the sound. For example, the speaker 3 faces upward at the positions shown in FIGS. 5A and 5C, and faces downward at the position shown in FIG. 5B. Also, node 2
Since A, 2B, and 2C rotate, fine adjustment of directivity becomes possible.

In the acoustic device according to the second embodiment, the peaker cylinder 2 is composed of three nodes 2A, 2B, and 2C. However, the number of nodes is not limited, and the number of nodes is smaller or less. It may be more than that. In addition, each joint 2A, 2B, 2
Although C has a cylindrical shape, it is not limited to a cylindrical shape as long as it can slide back and forth, and for example, a cylinder having a polygonal cross section may be used. Incidentally, even when the cross section of the speaker tube 2 is polygonal, the speaker tube 2 can be rotated by rotating the speaker tube 2 together with the pedestal attached to the operation panel 1A.

Although the audio apparatus according to the second embodiment has only the MD player 5 mounted thereon, it may have a CD player or a cassette player mounted thereon, or may have a plurality of these mounted. It may be what you did.

(Embodiment 3) FIGS. 7 and 8 are perspective views showing the appearance of an acoustic device according to Embodiment 3 of the present invention. FIG. 9 is a longitudinal sectional view of FIG. 7, and FIG. FIG. The acoustic device according to the third embodiment is an application example of the acoustic device according to the first embodiment, and includes a speaker tube 1
1, the sound device main body 10
A partition plate 13 (see FIG. 9 or FIG. 10) for forming an acoustic space 12 with the operation panel 10A of the
And a busless port 14 formed below the operation panel section 10A.

The speaker tube 11 has two joints 11A, 1
1B, bass reflex ports 15 and 16 are formed in each of the joints 11A and 11B. In this case, as shown in FIGS. 9 and 10, the bus reflex port 15 of the node 11A and the bus reflex port 16 of the node 11B are connected to the nodes 11A and 11B.
B is formed at a position where it overlaps when B is contracted and closes when it is extended.

When the joints 11A and 11B are contracted, the bass reflex ports 15 and 16 are in communication with each other, and the bass reflex ports 15 and 16 and the bass reflex port 14 of the portion that forms the acoustic space 12 of the acoustic device body 10 are low. The sound of the area comes out. That is, when the speaker tube portion 11 is contracted, the sound characteristics become substantially the full range. Speaker tube 1
When 1 is extended, the bass reflex ports 15 and 16 of the joints 11A and 11B are closed, so that no low-frequency sound is output, and a direct sound from the speaker 3, that is, a sound mainly composed of a middle and high frequency is output.

As described above, in the acoustic device according to the third embodiment, different sound characteristics are obtained when the speaker tube portion 11 is contracted and when the speaker tube portion 11 is expanded, so that the sound device can be selectively used according to the genre of sound. For example, when listening to music, the speaker tube 11 is contracted to have a sound characteristic close to the full range,
When listening to people's voices such as news, the sound is extended to make the sound characteristics mainly consist of the mid-high range.

In the acoustic device according to the third embodiment, the speaker tube 11 is composed of the two joints 11A and 11B. However, the number of joints is not limited. It may be above.

In the acoustic device according to the third embodiment, only one bass reflex port 14 is provided in a portion of the acoustic device main body 10 where the acoustic space 12 is formed. However, more bass reflex ports may be provided. Further, also in the acoustic device according to the third embodiment, the distal end of the node 11B of the speaker tube 11 may be cut obliquely to mount the speaker 3 in an inclined manner.

The audio device according to the third embodiment has only the MD player 5 mounted thereon, but may also have a CD player or cassette player mounted thereon, or a plurality of these devices. It may be what you did.

(Embodiment 4) FIGS. 11 and 12 are perspective views showing the appearance of an acoustic device according to Embodiment 4 of the present invention. The acoustic device according to the fourth embodiment includes three nodes 21A, 21B, and 21C.
A and 21B are provided with speaker tube portions 21 in which bass reflex ports 22 and 23 are formed. Knots 21A, 21
B reflex ports 22 and 23 of B are connected to joints 21A and 21B.
Is formed at a position exposed only when it is extended. Although not shown, a partition plate for creating an acoustic space similar to that of the acoustic device according to the third embodiment is provided in the acoustic device main body 20 of the acoustic device according to the fourth embodiment.

When the speaker tube 21 is extended, the bass reflex ports 22 and 23 of the joints 21A and 21B are exposed. That is, when the speaker tube portion 21 is extended, the sound characteristics are close to the full range, and when the speaker tube portion 21 is contracted, the bass reflex ports 22 and 23 are closed, so that no low-frequency sound is output, and A direct sound, that is, a sound mainly composed of the mid-high range is produced.

As described above, in the acoustic device according to the fourth embodiment, different sound characteristics are obtained when the speaker tube portion 21 is contracted and when the speaker tube portion 21 is expanded, so that the sound device can be selectively used according to the genre of sound. For example, when listening to music, the speaker tube 21 is extended to make sound characteristics close to the full range,
When listening to people's voices such as news, it is contracted to make the sound characteristics mainly in the mid-high range. When the speaker tube 21 is contracted when not in use, the bass reflex ports 22 and 23
It is possible to prevent dust and the like from entering the acoustic device body 20 through the main body.

In the acoustic device according to the fourth embodiment, the speaker tube 21 has three joints 21A, 21B, 2
It consisted of 1C, but the number of nodes was not limited,
It may be less or more. Further, in the acoustic device according to the fourth embodiment, the bass reflex ports 22, 23 are provided only at the nodes 21A, 21B of the speaker tube 21, but may be provided at the nodes 21C.

Also in the acoustic device according to the fourth embodiment, the speaker 3 may be mounted with the tip end of the node 21C of the speaker tube 21 cut obliquely and the speaker 3 inclined. Further, the audio device according to the fourth embodiment is provided with only the MD player 5, but may be provided with a CD player or a cassette player, or may be provided with a plurality of these devices. There may be.

[0041]

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 perspective view showing an appearance of an acoustic device according to Embodiment 2 of the present invention.

6 is a longitudinal sectional view of FIG.

FIG. 7 is a perspective view showing an appearance of an acoustic device according to Embodiment 3 of the present invention.

FIG. 8 is a perspective view showing an appearance of an acoustic device according to a third embodiment.

FIG. 9 is a longitudinal sectional view of FIG. 7;

10 is a longitudinal sectional view of FIG.

FIG. 11 is a perspective view showing an appearance of an acoustic device according to Embodiment 4 of the present invention.

FIG. 12 is a perspective view showing an appearance of an acoustic device according to a fourth embodiment.

FIG. 13 is a plan view showing a center speaker arrangement state of a conventional acoustic device.

[Explanation of symbols]

1, 10, 20 Sound device main body 1A, 10A, 20A Operation panel 2, 11, 21 Speaker tube 2A, 2B, 2C, 11A, 11B, 21A, 21B,
21C Section 3 Speaker 4 Motor 5 MD player 12 Sound space 13 Partition plate 14, 15, 16, 22, 23 Bass reflex port

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takuyuki Miyazawa 3-1 Tsunashima Higashi 4-chome, Kohoku-ku, Yokohama-shi, Kanagawa F-term (reference) 5D017 AE28

Claims (9)

[Claims] 1. An audio device main body, a speaker to which an audio signal is supplied from an audio output circuit in the audio device main body, and a speaker having the speaker inside and provided on a front panel of the audio device main body so as to be expandable and contractible. An acoustic device comprising a speaker tube portion provided. 2. The acoustic device according to claim 1, wherein said speaker tube portion is constituted by a plurality of nodes. 3. A partition plate that forms an acoustic space together with the speaker tube behind the speaker, and a bass reflex port that is provided on a peripheral wall that covers the acoustic space and opens when the speaker tube is extended. The acoustic device according to claim 1, wherein the acoustic device is provided. 4. A partition plate that forms an acoustic space together with the speaker tube behind the speaker, and a bass reflex port provided on a peripheral wall surface that covers the acoustic space and opens when the speaker tube is contracted. The acoustic device according to claim 1, wherein the acoustic device is provided. 5. The acoustic device according to claim 3, wherein the bass reflex port is provided in the speaker tube. 6. The acoustic device according to claim 3, wherein the bass reflex port is provided on the front panel. 7. The speaker according to claim 1, wherein the directional direction of the speaker is inclined with respect to the direction of expansion and contraction of the speaker tube, and the speaker tube rotates about the expansion and contraction direction as an axis.
The acoustic device according to claim 6. 8. The audio device according to claim 1, wherein the speaker is used as a center speaker. 9. The audio device according to claim 1, wherein the audio device main body is an in-vehicle audio device.