JPS61142703A - Electronic component bearing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a bearing device for an electronic component in a variable resistor etc. which is mainly used in a vehicle. The shape was as shown in . In Fig. 3, 1 is an axis whose cross section is completely non-circular;
2 is a bearing portion having a shaft hole of the same shape as the shaft 1, and 3 is a gap for moving the shaft 1 back and forth.

Problems to be Solved by the Invention However, in such a configuration, when trying to suppress backlash in the rotational direction of the shaft 1, the shape of the shaft hole may change due to sink marks due to shrinkage after molding or shrinkage due to environmental changes, etc. As shown in the figure, it becomes a distorted weight shape, which suppresses backlash in the rotational direction more than necessary, making it difficult to move the shaft 1 up and down freely. To eliminate the distortion caused by this sink mark, the fifth method is generally used.
Although it is possible to make the wall thickness uniform by providing holes 4 as shown in the figure, this is not effective because it involves deterioration in strength.

SUMMARY OF THE INVENTION In view of these problems, it is an object of the present invention to provide an electronic component bearing device in which a shaft can freely move forward and backward with less backlash in the rotational direction.

Means for Solving the Problem In order to solve this problem, in the present invention, relief portions are symmetrically provided in the thick portion of the peripheral edge of a portion of the shaft hole of the bearing portion.

Function: With this configuration, the parts affected by shrinkage are removed, making it possible to reduce backlash, and since the removal is minute, there is almost no deterioration in strength.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to all the drawings. FIG. 1 is a sectional view showing an embodiment of a bearing device according to the present invention. In Fig. 1, 6 is a shaft with a non-circular cross section such as an oval shape, 6 has a shaft hole that is approximately the same diameter as the shaft 5, and has a hole in the thick part of the periphery of the shaft hole. The shaft 6 is a bearing section having portions 7 provided symmetrically, and the shaft 6 is supported through the shaft hole of the bearing section 6 so as to be freely movable back and forth. According to this configuration, by managing only the shaded area A shown in FIG. 1, it is possible to reduce backlash in the rotational direction of the shaft 6, and also prevent deterioration in the strength of the bearing portion 2.

FIG. 2 is a block diagram of a bearing device according to a specific embodiment of the present invention, showing an hv and a variable resistor with a bush switch.

8 is the axis. 9 is a bearing. 10 is a cover.

This is because 11 is a slider mounting plate, which corresponds to the bearing section of the present invention. 12 is a slider.

13 is an insulating substrate with a resistor printed thereon. 14 is a terminal. 15 is a bush switch component.

Effects of the Invention In recent years, car stereos, car radios, and other sets have become more sophisticated, and their functions are now on par with ohm audio. It had become the law. There is also an increasing demand for minimizing backlash in the rotational direction, and the configuration of the present invention has the effect of minimizing backlash in the rotational direction of the shaft while ensuring good longitudinal movement of the shaft. It will be done.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a bearing device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing an example of a variable resistor with a bushing switch according to a specific embodiment of the present invention, and FIG. 3 is a conventional FIG. 4 is a sectional view showing the same bearing device in a distorted state, and FIG. 85 is a sectional view showing another conventional bearing device. 6.8...Shaft, e, 11...Bearing part (
slider mounting plate), 7... Relief part. Name of agent: Patent attorney Toshio Nakao and 1 other person Ichikura, Yase-ku, Figure 3, Figure 4? Figure 5

Claims (1)

[Claims] It consists of a shaft having a non-circular cross section, a shaft hole having the same shape as the diameter of the shaft, and a bearing portion having a relief portion symmetrically provided in the thick part of the periphery of the shaft hole, An electronic component bearing device, wherein the shaft hole of the bearing is configured such that the shaft can freely move back and forth.