JPS58255Y2 - Slide volume electrostatic noise prevention device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electrostatic noise prevention device for a slide volume, and is designed to prevent electrostatic noise during operation of a slide volume with an extremely simple configuration.

It has been known that electrostatic noise is generated when a slide volume is operated, and in order to prevent this electrostatic noise, a configuration as shown in FIGS. 1 and 2 has been adopted.

That is, a panel 1 having a long hole 1a, a conductive rubber having a slit 2a, and a chassis 3 having a long hole 3a are arranged one on top of the other, and the conductive operating shaft 4a of the slide volume 4 arranged inside the chassis 3 is set to the above length. A conductive plate spring 8 is made to project to the outside of the panel 1 through the holes 3a, la and the slit 2a and is fixed to the chassis 3 with screws I, and is brought into pressure contact with the conductive rubber 2.

In this way, the operation shaft 4a and the chassis 3 are electrically connected via the conductive rubber 2, the leaf spring 8, and the screw T, so that electrostatic noise can be prevented when the volume is operated.

However, in such a configuration, it is necessary to screw the leaf spring 6 one by one, which makes the assembly work complicated.

The present invention provides a 4-slide volume electrostatic noise prevention device that eliminates these conventional drawbacks.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

In FIGS. 3 to 5, parts having the same symbols as in FIGS. 1 and 2 have the same functions.

5 is a sheet for dustproofing and preventing the inside from being exposed, and a slit 5a is provided in the center.

Note that this sheet 5 does not need to be electrically conductive.

6 is a conductive rubber having a width wider than the elongated hole 3a of the chassis 3 and has a through hole 6a in the center, and by fitting the through hole 6a into the recess 4b of the operating shaft 4a, is fixed to.

The slide volume 4 is attached so that the recess 4b is located above the chassis 3.

Therefore, the conductive rubber 6 is curved as shown in FIG. 4, and both ends thereof come into contact with the periphery of the elongated hole 3a of the chassis 3.

Therefore, when the operation shaft 4a of the slide volume 4 is operated, the conductive rubber 6 comes into sliding contact with the shear 3, and as a result, it is possible to prevent electrostatic noise during the slide operation.

In addition, although the dustproof sheet 5 was provided separately in the above embodiment,
If the chassis 3 also serves as a cabinet, by making the conductive rubber 6 itself sufficiently longer than the longitudinal length of the elongated hole 3a of the chassis 3, the electrostatic noise prevention and dustproof functions can be achieved using the same conductive rubber. This can be achieved with 6.

In this way, the present invention can prevent static noise during slide operation by simply press-fitting conductive rubber into the operation shaft of the slide volume, so it has practical value by reducing assembly man-hours. It is something.

[Brief explanation of the drawing]

1 and 2 are a side sectional view and an exploded perspective view of a conventional example, and FIGS. 3, 4, and 5 are a side sectional view, a front sectional view, and an exploded perspective view of an embodiment of the present invention. It is. 1... Hanel, 1a... Long hole, 3...
... Chassis, 3a ... Long hole, 4 ...
...Slide volume, 4a...Operation axis, 5
... Sheet, 5a ... Slit, 6.
...Conductive rubber, 6a...Through hole.

Claims (1)

[Scope of utility model registration request] A slide volume is disposed inside a chassis having an elongated hole, and an operating shaft of the slide volume protrudes to the outside of the chassis through the elongated hole, and a portion of the operating shaft that protrudes from the chassis to the outside is provided with the A slide volume electrostatic noise prevention device in which a conductive rubber wider than the width of the elongated hole is press-fitted and the conductive rubber is brought into sliding contact with the periphery of the elongated hole of the chassis.