JPS596481Y2 - record player suspension - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in the suspension of a record player to prevent howling or vibration.

Conventionally, conical or cylindrical coil springs have been used to absorb and prevent mechanical vibrations transmitted to the record player panel surface, evening table, or pick-up arm, and their compression and tension effects have been used. is used.

For example, in a conventional cylindrical type that uses compression, a rubber material 2 such as neoprene or sponge is inserted inside a coil spring 1 as shown in FIG.
Also, in the case of a conical type, a similar rubber substance 4 is inserted inside the coil spring 3 as shown in Fig. 2 to absorb and prevent vibrations transmitted through the coil springs 1 and 3, and also to generate natural vibrations. We also try to prevent this.

However, in the case shown in Fig. 1, the rubber substance 2 inside is deformed due to long-term compression, and in the case shown in Fig. 2, since the coil spring 3 is constantly tensioned, there is a gap between the rubber substance 4 and the rubber substance 4. I can play.

For this reason, both have the disadvantage that the effect of preventing the generation of natural vibrations caused by the coil springs decreases over time.

Therefore, this invention aims to provide a suspension for a record player that can effectively prevent vibrations transmitted through a coil spring, and also prevent the vibration absorption and prevention effects from changing over time.

Hereinafter, one embodiment will be described with reference to the drawings.

FIG. 3 shows a conical pipe-like elastic material on the outside of a conical coil spring 10, which has an inner shape corresponding to the outer shape of the fill spring 10, is slightly smaller in size, and is made of butyl rubber with a large internal loss. The material 11 is fitted to cover the outside of the coil spring 10, and as shown in the figure, a hole 12 is formed in the fixing member 12 of the record player.
The large diameter part of the coil spring 10 is connected to the elastic material 11 at the upper edge of a.
The load of the playback section 13 of the record player is received in the tension direction inside the small diameter section of the coil spring 10.

Therefore, the elastic member 11 comes into close contact with the coil spring 10, and acts to absorb external vibrations and effectively prevent the vibration of the coil spring 10 itself, which attempts to vibrate naturally.

Furthermore, when the coil spring 10 expands under the load of the playback unit 13 of the record player, its large diameter portion moves toward the small diameter portion of the elastic material 11, and as the large diameter portion moves, the elastic material 11 is expanded. In order to achieve this, the elasticity of the elastic material 11 can also contribute to the vibration damping characteristics of the suspension.

Note that the elastic material 11 does not necessarily have to be butyl rubber, and may be natural, synthetic rubber, or the like.

As mentioned above, the present invention is constructed by fitting a conical pipe-shaped elastic member, which has an inner shape corresponding to the outer shape of the coil spring and is slightly smaller in size, onto the outside of a conical coil spring. , the large diameter part of the coil spring is supported by the fixing member of the record player via an elastic material fitted thereto, and the small diameter part receives the load of the playback part of the record player in the direction of tension. Therefore, with an extremely simple structure, the vibration transmitted through the coil spring itself is effectively absorbed by the conical pipe-shaped elastic material, preventing resonance of the coil spring itself, and the elastic material is The elasticity of the elastic material can completely follow the expansion of the material, and the elasticity of the elastic material also contributes to the vibration damping characteristics, and there is no drawback that the vibration absorption effect deteriorates due to aging.

[Brief explanation of the drawing]

Figures 1 and 2 are side views of conventional suspensions, and Figure 3 is a side view of a conventional suspension.
The figure is a side view of the suspension according to this invention. 10... Coil spring, 11...
Elastic material, 13... Reproduction section.

Claims (1)

[Scope of utility model registration request] A conical pipe-shaped elastic material having an inner shape corresponding to the outer shape of the coil spring and having a slightly smaller size is fitted onto the outside of a conical coil spring, and the large diameter portion of the coil spring A suspension for a record player, characterized in that the suspension is supported by a fixing member of the record player via an elastic material fitted thereto, and the small diameter part of the suspension receives the load of the playback part of the record player in the direction of tension.