JP2000138988A - Vibration-isolator for audio device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration isolator for an audio device by which propagation of speaker vibration to a cabinet can be prevented. SOLUTION: The vibration isolator for an audio device is provided with a vibration isolator main body 13 which can be held by its elastic force between a cabinet 3 and a speaker. Corrugated patterns 20, 21 are formed on at least one of the surfaces of the vibration isolator main body 13 which are in contact with the cabinet 3 and the speaker and the hardness of the vibration isolator main body 13 is selected to be 25 deg. (JISK-6235) or below.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator for audio equipment used when a speaker built in audio equipment such as a television receiver is mounted on a cabinet.

[0002]

2. Description of the Related Art A television receiver has a built-in speaker. Such a speaker is mounted on a cabinet through a vibration isolator made of a rubber material so that vibrations due to sound waves are not transmitted to the cabinet and built-in components. ing.
In particular, recent television receivers tend to place importance on the acoustic effect, and therefore are generally devised so that a large output sound pressure can be obtained.

[0003]

The conventional vibration isolator has, for example, a cylindrical shape, and is interposed between the speaker side and the cabinet side, and furthermore, the speaker is provided by bolts inserted through the vibration isolator. It was a configuration that was fastened and fixed to the cabinet.

[0004] However, the portion of the vibration isolator that contacts the speaker and the cabinet has a smooth surface, and therefore has a large contact area.

In addition, since the vibration isolator is made of a material having relatively high hardness, the vibration on the speaker side is not reliably absorbed and transmitted to the cabinet. Vibration on the speaker side causes chattering of the cathode ray tube, which has the disadvantage of reducing image accuracy. In particular, the above-mentioned problem becomes remarkable in a television receiver which emphasizes sound as described above, since the sound pressure output is large.

Accordingly, the present invention has been made to solve such a problem, and an object of the present invention is to provide a vibration isolator for audio equipment capable of preventing vibration of a speaker from being transmitted to a cabinet. And

[0007]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and the feature of the present invention is that a protective material having an elastic force so as to be interposed between the cabinet 3 side and the speaker 9 side. An anti-vibration body for an audio device including the vibration body main body 13, on the contact surface of the vibration prevention body main body 13 with at least one of the cabinet 3 side and the speaker 9 side, uneven portions 20 and 21 are formed. In addition, the hardness of the vibration isolator main body 13 is not more than 25 ° (JISK-6253). Note that the acoustic device refers to an electric device including a speaker. The cabinet 3 side is the fixed side.

Then, the vibration isolator 12 comes into contact with the cabinet 3 and / or the speaker 9 via the concave and convex portions 20 and 21, and the contact area between the vibration isolator 12 and the cabinet 3 and the speaker 9 is reduced. Become smaller. Moreover, since the vibration isolator 12 is made of a soft material, the speaker 9
The vibration on the side becomes difficult to be transmitted to the vibration isolator 12, and even if the vibration is transmitted to the vibration isolator 12, the vibration isolator 12 reliably absorbs the vibration.

Further, it is preferable that the vibration isolator main body 13 is formed in a cylindrical shape from a rubber material, and the concave and convex portions 20, 21 are formed on the inner and outer peripheral surfaces thereof by knurling, respectively. In such a case, the concave and convex portions 20 and 21 can be easily formed on the vibration isolator main body 13 by knurling, and there is an advantage that the productivity is high.

[0010]

1 to 3 show an embodiment of the present invention. In FIG. 3, reference numeral 1 denotes a television receiver as audio equipment, and the television receiver 1 is a television cabinet 3
And a main unit such as a cathode ray tube 7 fixed to the TV cabinet 3 and a speaker unit 5 built in the TV cabinet 3.

The speaker units 5 are arranged on both sides of the television cabinet 3 and between the television cabinet 3 and the CRT 7. The speaker unit 5 includes an acoustic tube 6 attached to the television cabinet 3 via a vibration isolator 12, and a speaker 9 attached to a rear end of the acoustic tube 6.

The acoustic tube 6 guides the sound wave generated from the speaker 9 to the opening 6a at the tip, and has an advantage that a large output sound pressure can be obtained. The acoustic tube 6 is provided with a mounting portion 8 at an appropriate position, and the mounting portion 8 is formed with an insertion hole 10 as shown in FIG.

As shown in FIG. 2, the vibration isolator 12 is formed in a cylindrical shape from a rubber material having an elastic force, and has a small-diameter portion 16 and a pair of large-diameter flange portions provided at both ends of the small-diameter portion 16. A vibration isolator main body 13 including 17a and 17b is provided.
The rubber composition is, for example, ethylene-propylene rubber (E
PDM) and a hardness of 25 ° (JISK-625)
3) It is set as follows. Preferably, the vibration isolator main body 1
The hardness is set to 20 to 25 ° so that an appropriate strength of 3 is obtained and the production is easy.

An insertion hole 13a is formed in the vibration isolator body 13 over the entire length thereof.
0 is formed. The concavo-convex portion 20 is formed by knurling, and a convex ridge 20a or a concave ridge 20b is formed over the entire length of the vibration isolator body 13, and the convex ridge 20a or the concave ridge 20b is provided on the entire circumferential surface of the inner surface. Have been.

Also, on the outer peripheral surface of the small-diameter portion 16, an uneven portion 21 composed of a convex ridge 21a or a concave ridge 21b is provided.
6 is provided over the entire circumference in the circumferential direction and over the entire length.

The TV cabinet 3 includes a vibration isolator 1
A holding portion 15 formed of a mounting hole or a notch through which the second member 2 is inserted is formed, and the small diameter portion 16 of the vibration isolator 12 is fitted into the holding portion 15. In addition, it is preferable that the protrusion 21a of the small diameter portion 16 contacts the inner peripheral surface of the holding portion 15 and does not contact the recess 21b. Also, the TV cabinet 3 has
A fitting portion 16 into which one flange portion 17a of the vibration isolator 12 is fitted is formed.

The television cabinet 3 has a female screw 24 formed therein. Therefore, the fastener 25 such as a bolt or a screw is attached to the acoustic tube 6 so that the mounting portion 8 of the acoustic tube 6 is pressed against the other flange portion 17b of the vibration isolator 12.
Is inserted through the insertion hole 13a of the vibration isolator body 13 through the insertion hole 10 of the TV cabinet 3
Is screwed into the female screw portion 24 of the helical member. It is preferable that the fastener 25 contacts the convex ridge 20a of the vibration isolator 12 and does not contact the concave ridge 20b.

The operation of the anti-vibration structure of the television receiver according to the present embodiment having the above configuration will be described.

First, during use of the television receiver,
When an electric signal is applied to the speaker 9, sound waves are generated, and the sound waves are transmitted through the acoustic tube 8 and emitted from the opening 6a.
At this time, the acoustic tube 8 vibrates, but since the acoustic tube 8 is attached to the television cabinet 3 via the vibration isolator 12, the vibration is not transmitted.

That is, the holding portion 15 of the television cabinet 3
Of the small diameter portion 16 of the vibration isolator body 13
Are slightly elastically deformed and are in contact with each other.
Since the ridges 20a on the inner peripheral surface of the vibration isolator main body 13 are slightly elastically deformed and are in contact with each other, the respective contact areas are reduced, and vibrations are difficult to be transmitted. Since the ridges 21a and the ridges 20a are provided so as to protrude in a direction (radial) perpendicular to the direction in which the acoustic tube 8 is fastened by the fasteners 25, there is no possibility that the ridges 21a are crushed during fastening.

Further, since the vibration isolator 12 is made of a soft rubber material having a hardness of 25 ° or less, the vibration of the speaker 9 can be reliably absorbed. As a result, since the vibration of the CRT 7 is prevented from being transmitted, the CRT 7 is not affected by vibration such as chatter, and does not adversely affect the image.

The present invention is not limited to the above embodiment, but may have the structure shown in FIGS.
That is, the TV cabinet 3 is provided with the boss portion 30. An insertion hole or notch 10a is formed as the mounting portion 8 of the acoustic tube 6, and the small-diameter portion 16 of the vibration isolator 12 is fitted into the notch 10a.

The boss 30 is inserted through the insertion hole 13a of the vibration isolator 12, and the vibration isolator 12 is
a is positioned by a rib 31 provided integrally with the boss 30.

At the tip of each boss 30, a screw (fastener)
25 is screwed in through a washer 32, and the washer 32 presses the other flange portion 17b, whereby the vibration isolator 12 is held by the boss portion 30. It will be attached via the vibration body 12.

Also in the embodiment having such a configuration, the ridge 20a on the inner peripheral surface of the vibration isolator body 13 is slightly elastically deformed and is in contact with the peripheral surface of the boss portion 30 on the TV cabinet 3 side. Notch 10 in the acoustic tube 8 on the speaker 9 side
a of the small diameter portion 16 of the vibration isolator body 13
Since a is slightly elastically deformed and is in contact with each other, the contact area of each is reduced as described above, and it becomes difficult for vibration to be transmitted. Since the ridges 21a and the ridges 20a are provided so as to protrude in a direction (radial) perpendicular to the direction in which the acoustic tube 8 is fastened by the screws 25, there is no risk of being crushed during fastening.

In each of the above embodiments, the speaker unit 5 is constituted by the speaker 9 and the acoustic tube 6. However, the speaker 9 may be directly attached to the television cabinet 3 without providing the acoustic tube 6. In such a case, the vibration isolator 12 is interposed between the flange of the speaker 9 and the television cabinet 3.

Further, both flanges 17 of the vibration isolator 12 are provided.
It is also possible to provide irregularities on the surfaces of a and 17b (contact surfaces with the speaker 9 and the TV cabinet 3) in the same manner as described above. In addition, the uneven portion is not limited to a continuous convex or concave stripe, but may be intermittent or irregularly projecting at an arbitrary position.

In addition, the audio equipment may be a radio or audio equipment other than the television receiver, and the use of the vibration isolator 12 is not particularly limited.

[0029]

According to the present invention, there is provided a vibration isolator for an audio equipment having a vibration isolator main body having an elastic force to be interposed between a cabinet side and a speaker side. An uneven portion is formed on the contact surface with at least one of the cabinet side and the speaker side, and the hardness of the vibration isolator body is 25 ° or less, so that vibration from the speaker is reliably prevented from being transmitted to the cabinet. And the anti-vibration characteristics can be improved.

As a result, when the vibration isolator of the present invention is employed in a television receiver, other built-in components such as a cathode ray tube can be protected from vibrations on the speaker side, which adversely affects the performance of the device. There is no.

Further, when the vibration isolator main body is formed in a cylindrical shape from a rubber material, and the inner peripheral surface and the outer peripheral surface are formed with knurling, respectively,
It can be easily manufactured and has good productivity.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part according to an embodiment of the present invention.

2A and 2B show the vibration isolator, wherein FIG. 2A is a perspective view, and FIG.

FIG. 3 shows a case where the present invention is adopted in a television receiver;
(A) is the whole perspective view including a partial fracture, (b) is a schematic sectional view.

FIG. 4 is a sectional view of a main part according to another embodiment of the present invention.

FIG. 5 is an exploded perspective view schematically showing a configuration for attaching the acoustic tube to a television cabinet.

[Explanation of symbols]

3 cabinet, 9 speaker, 12 vibration isolator, 13
... Vibration isolator body, 20...

[Procedure amendment]

[Submission Date] November 26, 1999 (1999.11.
26)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problem, and has a feature that the vibration isolator having an elastic force so as to be interposed between the cabinet 3 side and the speaker 9 side. A vibration isolator for an audio device including a body 13, wherein the vibration isolator body 13 includes a small-diameter portion 16 and a small-diameter portion 16.
A pair of large-diameter flange portions 17a provided at both ends of
17b, and the vibration isolator body 13 has a full length
Through holes 13a, the vibration isolator body
13 and the outer peripheral surface of the small diameter portion 16
0,21 are respectively formed, moreover, isolator body 13
Has a hardness of 25 ° (JISK-6253) or less. Note that the acoustic device refers to an electric device including a speaker. The cabinet 3 side is the fixed side.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masahiro Takahata 48, Shinko Chemical Co., Ltd., 3-1-1 Takatsukadai, Nishi-ku, Kobe-shi, Hyogo (72) Inventor Yuji Yakami 1 Matsushitacho, Ibaraki-shi, Osaka -1 Matsushita Electric Industrial Co., Ltd. AVC Company Television Network Systems Division Engineering Dept. F-term (reference) 5D017 AG08

Claims (2)

[Claims] 1. A cabinet (3) and a speaker (7).
A vibration isolator for an audio equipment comprising a vibration isolator main body (13) having an elastic force to be interposed between the cabinet (3) and the speaker (3) in the vibration isolator main body (13). (7) On the contact surface with at least one of the sides,
A vibration isolator for audio equipment, characterized in that uneven portions (20) and (21) are formed and the hardness of the vibration isolator body (13) is 25 ° or less (JISK-6253) or less. 2. The vibration isolator main body (13) is formed in a cylindrical shape from a rubber material, and has concave and convex portions (20) and (21) formed on its inner peripheral surface and outer peripheral surface by knurling, respectively. A vibration isolator for audio equipment according to claim 1.