JPH0530283B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating electronic component such as a variable resistor that is mainly used in a vehicle.

2. Description of the Related Art A general example of a conventional rotary electronic component will be explained using a rotary variable resistor with a push switch shown in FIG.

8 is a shaft, 9 is a bearing that supports this shaft 8, and 10 is a cover fixed to this bearing 9 by caulking. 11 is a slider mounting plate, 12 is a slider attached to this slider mounting plate 11,
Reference numeral 13 denotes a resistor-printed insulating substrate on which terminals 14 are mounted, and a variable resistor section is constructed by the above. A push switch section 15 is attached to the rear of this variable resistor section, forming a rotary variable resistor with a push switch.

In the rotary variable resistor with a push switch formed as described above, the slider mounting plate 11 is rotated by rotating the shaft 8, and the slider 12 is mounted on the resistor-printed insulating substrate 13. The resistance value is adjusted by sliding the free end of the button, and the push switch section 15 is turned on by moving the shaft 8 back and forth.
It is driven off. Note that the relationship between the shaft 8 and the slider mounting plate 11 to achieve the above function is shown in the third example.
To explain with the drawing, 1 is a non-circular oval shaped part having straight parts on both sides of the shaft 8, and 2 is provided on the slider mounting plate 11 so as to have a small gap 3 with this oval shaped part 1. The shaft hole is of the same oval shape with straight parts on both sides, and the shaft 8 is moved back and forth by the gap 3 to push the push switch part 1.
5 can be turned on and off smoothly.

Problems to be Solved by the Invention However, in such a configuration, when trying to suppress the wobbling in the rotational direction of the shaft 8, it may cause sink marks due to shrinkage after molding or shrinkage due to environmental changes.
There was a problem in that the shape of the shaft hole was shaped like a distorted weight as shown in FIG. 4, which suppressed wobbling in the rotational direction more than necessary and made it difficult to freely move the shaft 8 up and down. In order to eliminate the distortion caused by this sink mark, the thickness is generally made uniform by providing holes 4 as shown in FIG. 5, but this is accompanied by forced deterioration.

SUMMARY OF THE INVENTION In view of these problems, it is an object of the present invention to provide a rotary electronic component whose shaft can be freely rotated forward and backward with less wobbling in the rotational direction.

Means for Solving the Problem In order to solve this problem, in the present invention, recesses are provided in approximately the center portions of the straight portions on both sides of the oval-shaped shaft hole of the slider mounting plate.

Function As described above, since recesses are provided approximately in the center on both sides of the shaft hole of the slider mounting plate, even if the slider mounting plate contracts, the gap between the shaft hole and the shaft is maintained. Therefore, there is little wobbling when the shaft rotates, and the shaft can smoothly move back and forth. In addition, since the recess is sufficient to ensure a gap against contraction of the shaft hole, the depth of the recess only needs to be very small, so there is almost no deterioration in the strength of the slider mounting plate.

Embodiment Hereinafter, an embodiment of the rotary electronic component of the present invention will be described with reference to FIG.

This figure shows the relationship between the shaft and slider mounting plate of a rotary variable resistor with a push switch.The same parts as in the prior art are given the same numbers. 6 is a non-circular oval-shaped part having a straight part on both sides so as to fit with this oval-shaped part 1 with a small gap 3, and a recessed part in each approximately central part of this straight part. The shaft hole 6 has a substantially oval shape with a hole 7 provided therein. Due to the concave portion 7 of the shaft hole 6 having the above structure, even if the slider mounting plate 11 shrinks and deforms after molding, the oval-shaped portion 1 of the shaft 8 will not be pressed down by the shaft hole 6, and this shaft 8 In addition to smoothly moving back and forth, the rotational direction of the shaft 8 (non-circular portion 1 in FIG. 1) can be controlled by controlling only the shaded area A at the end of the straight portion forming the recess 7 shown in FIG. This can reduce rattling and also prevents the strength of the slider mounting plate 11 from deteriorating.

The overall configuration of the rotary variable resistor with a push switch is the same as that of the prior art, so a description thereof will be omitted.

Furthermore, the present invention is not limited to the rotary variable resistor with a push switch as described above, and may be any type as long as the front side constitutes a rotary electronic component such as a rotary switch. The slider mounting plate 11 in the above embodiment is a rotary drive body equipped with a slider, etc., and has a shaft hole with a concave portion in the straight portion, and the rear side is driven by the back and forth movement of the shaft. It is also possible to provide not only a push switch section but also a pull switch section.

Effects of the Invention As described above, the present invention provides a shaft having a substantially oval shape of the rotary driving body of the first rotary electronic component section on the front side, and having a slight gap in the shaft hole with a concave portion approximately in the center of the straight portions on both sides. Since the oval shaped part of the shaft is supported so as to be movable back and forth, the contraction of the rotary drive body is absorbed by the recessed part, and when the push or pull switch part attached to the rear is driven by the back and forth movement of the shaft, Not only can it be driven with smooth back and forth motion, but it can also suppress wobbling in the rotational direction of the shaft.

[Brief explanation of the drawing]

Fig. 1 is a top view of a shaft and slider mounting plate, which are the main parts of a variable resistor with a push switch, which is an embodiment of the rotating electronic component of the present invention, and Fig. 2 is a top view of a conventional variable resistor with a push switch. Figure 3 is an exploded perspective view, and Figure 3 is a top view of the main parts of the shaft and slider mounting plate.
This figure is a top view showing the same distorted state, and FIG. 5 is a top view of another slider mounting plate and shaft. 1... Oval shaped part, 6... Shaft hole, 8... Shaft, 7
... recess, 11 ... slider mounting plate, 15 ... push switch part.

Claims (1)

[Claims] 1. A shaft having an oval-shaped part, a rotary drive body having an oval-shaped shaft hole that supports the oval-shaped part so as to be movable back and forth, and a shaft hole formed in an oval shape with a slight gap in the oval-shaped part, and this rotation A concave portion provided approximately in the center of the linear portion on both sides of the oval-shaped shaft hole of the drive body, a rotary electronic component section that incorporates this rotary drive body, and a rotary electronic component section that is attached to the rear of this rotary electronic component section, and the above-mentioned A rotating electronic component consisting of a push switch or pull switch that is driven by the back and forth movement of a shaft.