JP2005203831A - Fitting structure of speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fitting structure of a speaker capable of warranting clear sound by preventing the production of vibration at a speaker fitting part, in particular, to provide a fitting structure of a speaker optimum even to an automobile door speaker located under a severe environment wherein much vibration and noise exist. <P>SOLUTION: A flange part 2 of a speaker 1 and a speaker support base member 3 are tightened and fixed by interposing a composite vibration proof member 5 formed by stacking a plurality of vibration proof materials with different vibration attenuation capabilities between them. A three-layer structured member formed by stacking a layer 5a made of an olefin-based foamed body, a layer 5b made of a butyl-rubber-based thermoplastic elastomer, and a layer 5c made of a urethane-based elastomer is employed for the composite vibration proof member 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a speaker mounting structure capable of preventing the occurrence of vibration in a speaker mounting portion and guaranteeing a clear sound. More specifically, the present invention relates to a speaker mounting structure that is optimal for automobile door speakers that are subject to severe vibration and noise.

  2. Description of the Related Art Conventionally, speaker mounting structures have been required to ensure the clear sound by preventing the occurrence of vibration at the speaker mounting portion. Particularly, in the case of an automobile door speaker, since it is in an environment with a lot of vibration and noise, prevention or suppression of vibration has been strongly desired.

For the purpose of the above-described anti-vibration action, for example, as shown in Patent Document 1 and Patent Document 2, screws are fixed between a speaker and a panel or the like via an anti-vibration material having excellent vibration damping ability. What has been developed has been developed and put into practical use. However, since the conventional anti-vibration material is formed from a single material such as an anti-vibration rubber, felt, or an elastic member made of synthetic resin, although it exhibits an anti-vibration effect against vibrations of a specific frequency, There has been a problem that a sufficient anti-vibration effect cannot be exhibited against vibrations of other frequencies. Moreover, since it is difficult to fix the elastic vibration-proof material with screws with a constant fastening force so that there is no variation, the assembly work of the speaker cannot be performed efficiently.
JP 2002-165286 A JP 2003-102081 A

  The present invention solves the above-described problems, and can exhibit a sufficient vibration-proofing effect not only for a specific frequency but also for a wide range of frequencies. Also in fastening a speaker, fastening of a fastening material such as a screw is possible. The present invention has been completed for the purpose of providing a speaker mounting structure that can perform work stably and easily without variation.

  The speaker mounting structure of the present invention, which has been made to solve the above problems, is a composite anti-vibration structure in which a plurality of anti-vibration materials having different vibration damping capabilities are laminated between a speaker flange and a speaker holding base material. It is characterized by being fastened and fixed with a vibration material interposed.

  The speaker mounting structure of the present invention is composed of a composite anti-vibration material in which a composite anti-vibration material in which a plurality of anti-vibration materials having different vibration damping capabilities are interposed between a speaker and a base material. The vibration material will exhibit a sufficient anti-vibration effect not only for a specific frequency but also for a wide range of frequencies, ensuring a clear sound.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a case where the present invention is applied to mounting a speaker on an automobile door. In the figure, 1 is a speaker, 2 is a speaker mounting flange, 3 is a speaker holding base such as a door trim or inner panel, 4 is a screw screw for fastening the flange 2 and base 3 and the like. The fastening material is basically the same as the conventional speaker mounting structure in that the flange portion 2 is fastened and fixed to the base material 3 by the fastening material 4.

In the present invention, a composite vibration-proof material 5 in which a plurality of vibration-proof materials having different vibration damping capabilities are interposed between the flange portion 2 of the speaker and the base material 3 for holding the speaker is fastened and fixed. It has the characteristics.
By using such a composite anti-vibration material 5, a sufficient anti-vibration effect is exhibited over a wide range of frequencies as compared with a conventional anti-vibration material made of a single anti-vibration material. In places where multiple members are assembled in a complex manner, as in the case of door speaker mounting, multiple anti-vibration materials with different vibration damping capabilities each have their own anti-vibration effect, and the total is wide. As a result, a sufficient anti-vibration effect with respect to the frequency is exhibited, and a clear sound is guaranteed.

As the composite vibration damping material 5 in which a plurality of vibration damping materials having different vibration damping capabilities are laminated, for example, as shown in FIG. 2, a layer 5a made of an olefin foam and a layer made of a butyl thermoplastic elastomer The thing of the three-layer structure which laminated | stacked 5b and the layer 5c which consists of urethane type elastomer can be used.
In the illustrated example, the layer 5a made of an olefin-based foam is used as an intermediate layer, the layer 5b made of a butyl thermoplastic elastomer is used as a surface layer on one surface of the intermediate layer 5a, and the urethane-based elastomer is used on the other surface. Although the layer 5c to be formed is a back layer, it is needless to say that either the intermediate layer or the front and back layers may be used.

  FIG. 3 shows the relationship between the frequency and amplitude of the vibration isolator having the three-layer structure. This graph represents the anti-vibration performance, and the anti-vibration characteristic of the present invention is shown by a diagram A. As a comparative example, the anti-vibration characteristic when the anti-vibration material made of a single anti-vibration material is interposed is shown by the diagram B, and the anti-vibration property when the anti-vibration material is not interposed is shown by the diagram C. It was confirmed that the anti-vibration characteristics of the present invention can exhibit a sufficient anti-vibration effect for a wide range of frequencies compared to the conventional example.

Further, the fastening material 4 for fastening the flange portion 2 and the base material 3 can be fastened via the resin tube 6.
This is to prevent vibration from being directly transmitted through the resin tube 6 since the vibration is transmitted from the flange portion 2 and the fastening material 4 when the speaker 1 is fastened. As a material of the resin tube 6, polypropylene resin having a large vibration transmission loss coefficient can be used.
In addition, the presence of the resin tube 6 allows the fastening material 4 to be always fastened at a fixed position when fastening the fastening material 4, so that variations in fastening can be prevented, and an elastic composite The anti-vibration material 5 is always held at a constant compression rate to exhibit an accurate anti-vibration effect.

  As described above, the speaker mounting structure of the present invention is a composite in which a plurality of vibration damping materials having different vibration damping capabilities are laminated between the flange portion 2 of the speaker 1 and the base material 3 for holding the speaker. Since the anti-vibration material 5 is fastened and fixed, the composite anti-vibration material 5 exhibits a sufficient anti-vibration effect not only for a specific frequency but also for a wide range of frequencies, so that a clear sound can be guaranteed. It becomes. Further, in assembling the speaker, the fastening operation of the fastening material 4 such as a screw can be performed stably and easily without variation.

It is sectional drawing which shows embodiment of this invention. It is sectional drawing which shows the principal part of this invention. It is a graph which shows the relationship between the frequency and amplitude of a vibration isolating material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Speaker 2 Flange part 3 Base material 4 Fastening material 5 Composite vibration-proof material 5a Layer 5b which consists of olefin type foams 5c Layer which consists of butyl-type thermoplastic elastomers Layer 6 which consists of urethane-type elastomers 6 Resin tube

Claims (3)

  A speaker mounting structure characterized by fastening and fixing a composite vibration isolating material in which a plurality of vibration isolating materials having different vibration damping capabilities are interposed between a speaker flange portion and a speaker holding base material .   The speaker attachment according to claim 1, wherein the composite vibration isolator is a three-layer structure in which a layer made of an olefin foam, a layer made of a butyl thermoplastic elastomer, and a layer made of a urethane elastomer are laminated. Construction. The speaker mounting structure according to claim 1, wherein the fastening material that fastens the flange portion and the base material is fastened via a resin tube.

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