JPH0731435Y2 - Insulator structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Use The present invention relates to an insulator structure used in an electronic device such as a CD player, and particularly to an insulator suitable for absorbing vertical vibration applied to the electronic device. It is about structure.

(B) Prior art Examples of the structure of the insulator provided at the bottom of electronic equipment such as a CD player and a record player are as follows.
There is one configured as shown in a front view in which a part of FIG. 4 is sectioned.

The insulator shown in FIG. 4 includes a rubber bell 11 having a bell shape, the rubber leg 11 and the bottom of the electronic device (not shown).
A coil spring 12 disposed between and, a decorative ring 13,
And a fixing screw 14 for attaching to the bottom.

(C) Problems to be solved by the device However, in the conventional insulator of FIG. 4 described above, since the portion to be attached to the bottom of the electronic device is formed in the center of the rubber leg 11, the lateral force is not applied. When receiving, the rubber leg 11 is deformed in the lateral direction, and for example, when the operation button provided on the front surface of the electronic device is pressed, the electronic device main body sways and shakes.

This invention solves the above-mentioned drawbacks of the prior art and provides an insulator structure capable of only vertical movement.

(D) Means for Solving the Problems The insulator structure of the present invention has an arm-shaped leg member that has a fulcrum at one end supported by the bottom, and rotates about the fulcrum, and the leg member is free. A first vibration absorbing portion formed by a coil spring arranged between the end and the bottom, and a natural vibration frequency different from the natural vibration frequency of the first vibration absorbing portion, and the freedom of the piston and the leg member attached to the bottom. A second vibration absorbing portion formed by an air spring constituted by a cylinder formed in the end is provided, and when the vibration frequency is near the natural vibration frequency of the first vibration absorbing portion, the second vibration absorbing portion suppresses resonance. Is configured as follows.

(E) Action When the vibration frequency applied to the electronic device is near the natural vibration frequency of the coil spring of the first vibration absorbing portion, the resonance can be suppressed by the second vibration absorbing portion by the air spring.

(F) Embodiment An embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a sectional view showing a state in which the insulator according to the present invention is attached to the bottom of an electronic device.

In the figure, 1 is a holder, and a screw 2 is attached to the bottom portion A of the electronic device.
It is installed in. The arm-shaped leg member 3 is rotatably supported by the holder 1 by a fulcrum 3b formed at one end 3a. At the free end 3c of the leg member 3, a chamber 3d for storing one end side of the coil spring 4 and a cylinder 3e are formed, and further, at a portion 3f to be mounted on a table (not shown) on which electronic equipment is mounted, A rubber sheet 5 for preventing slipping is attached.

The coil spring 4 is arranged between the leg member 3 and the holder 1 and constitutes a first vibration absorbing portion. The coil spring 4 of the first vibration absorbing portion holds a spring force that prevents the holder 1 and the free end 3c of the leg member 3 from coming into close contact with each other at the maximum load.

Further, the cylinder 3e has a piston 6 attached to the holder 1 inserted therein, and constitutes a second vibration absorbing portion by an air spring thereof.

Further, the first vibration absorbing portion formed by the coil spring 4 and the second vibration absorbing portion formed by the air spring are set with different natural vibration frequencies.

A rubber sheet 7 is attached to a portion of the holder 1 where one of the coil springs 4 abuts and serves to suppress the transmission of vibration. Reference numeral 8 denotes a piston ring, which is for keeping the airtightness of the air in the cylinder 3e while allowing the piston 6 to smoothly operate in the cylinder 3e. Reference numeral 9 denotes a screw having a collar portion, which limits the range of rotation of the leg member 3, particularly the range in which the leg member 3 rotates outward about the fulcrum 3b when the electronic device is lifted from the mounting table. Is.

According to the embodiment thus constructed, when the external force is applied to the electronic device, the vibration is normally damped by the first vibration absorbing portion by the coil spring 4.

If the vibration applied from the outside is near the natural vibration frequency of the coil spring 4, for example, f _{0 of the} coil spring 4 shown in FIG. 3 (the portion shown by in FIG. 3, 10 to 15 Hz), the air spring Due to the action of the second vibration absorbing portion, the resonance can be suppressed as shown in FIG. (In FIG. 2, it can be seen that the peak in the portion of FIG. 3 is suppressed.) The second vibration absorbing portion is an air spring composed of the piston 6 and the cylinder 3e, The cylinder 3e moves only up and down in the piston 6. Since the insulator acts as a rigid body in the lateral direction due to the movements of the leg member 3 and the second vibration absorbing portion, it does not sway laterally even if a lateral force is applied to the electronic device from the outside. .

(G) Effect of the Invention According to the insulator structure according to the present invention, a favorable vibration absorbing effect is obtained by the synergistic action of the first vibration absorbing portion by the coil spring and the second vibration absorbing portion by the air spring constituted by the piston and the cylinder. Obtainable. In particular, when the vibration frequency applied to the electronic device is near the natural vibration frequency of the coil spring, resonance can be suppressed by the action of the air spring.

Also, the leg member can move only around the fulcrum in the direction of rotation,
Moreover, since the second vibration absorber can move only in the vertical direction, the insulator acts as a rigid body in the horizontal direction.
Therefore, even when an external force in the lateral direction is applied to the electronic device, the problem that the electronic device sways laterally is eliminated.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the insulator of the present invention. FIG. 2 is a transfer function characteristic diagram of the insulator shown in FIG. 1, and FIG. 3 is a transfer function characteristic diagram when only the coil spring is used. FIG. 4 is a partially sectional front view showing an example of a conventional insulator structure. Description of main part code 1: Holder 3: Leg member, 3b: Support point, 3e: Cylinder 4: Coil spring 6: Piston A: Bottom of electronic device

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Claims (2)

[Scope of utility model registration request] 1. An arm-shaped leg member having a fulcrum at one end supported by the bottom of an electronic device and rotating about the fulcrum, and between the inside of the free end of the leg member and the bottom. The first vibration absorbing portion by the arranged coil spring and the natural vibration frequency different from the natural vibration frequency of the first vibration absorbing portion are set,
A second vibration absorbing portion formed by an air spring constituted by a piston attached to the bottom portion and a cylinder formed in the free end of the leg member, wherein a vibration frequency is a natural vibration frequency of the first vibration absorbing portion. The insulator structure is characterized in that the second vibration absorbing portion is configured to suppress resonance in the vicinity thereof. 2. A utility model characterized in that the first vibration absorbing portion formed by the coil spring is movably restricted only in the vertical direction by a second vibration absorbing portion formed by a piston and a cylinder. The insulator structure according to claim 1.