JPS61108108A - Rotary operation type electronic component - 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 rotary-operable electronic components such as variable resistors and switches used in various electronic devices such as video equipment and audio equipment. The present invention relates to an electronic component of the type that allows the operating shaft to be moved back and forth in addition to rotating the operating shaft.

(Structure of a conventional example and its problems) A conventional example of this type of electronic component will be explained with reference to FIGS. 1 to 6.

FIG. 1 is a side sectional view showing a conventional example of a type in which a pull-butch type switch is attached to the rear end of a rotary-operable variable resistor. In the figure, 1 is an operating shaft, and by rotating this operating shaft, the rotating body 2 of the variable resistor section I rotates, and the slider 3 attached to the rotating body rotates on the resistance element 4. By sliding, the resistance value between the terminals 5 and 6 (6 is not shown) changes, and by pushing and pulling the operating shaft 1, the driver 7 of the switch part (■) is moved, and the repulsive force of the reversing spring 8 is The contact holder 9 moves in the opposite direction, and the movable contact 10 held by the holder 9 moves back and forth to alternately conduct or open the fixed contacts 11.12 or 12.13.

Here, the operating shaft 1 has a shape as shown in FIG. It is divided into an oval-shaped part IC, which is connected to the drive body 7, and a rear end part ID, which is connected to the driving body 7. The method of holding the operating shaft 1 in this variable resistor with a pull/bush switch is as shown in FIG.
The circular hole 15 allows the circular part IB to freely move forward and backward and rotate, and the oval shaped hole 16 in the rotating body 2 allows the oval shaped part IC to move freely back and forth, but rotates in the direction of rotation. They are each supported by point fitting.

Here, from the state shown in Fig. 1 in which the operating shaft 1 is pushed in (the state in which the pull/button switch is pushed), the state in which the operating shaft 1 is pulled out (the state in which the pull/button switch is pulled) shown in Fig. 3 is changed. ), the circular hole 13 of the bearing 14
The position of the inner circular portion IB moves from the rear to the front by the operating stroke (L) of the switch. In order for the circular part IB of the operating shaft 1 to be supported by the inner diameter part of the bearing 14 in the state shown in FIG. 3, the length of the circular hole 15 of the bearing 14 must be slightly longer than the stroke (L) of the switch. Longer dimensions are required. Therefore, in this type of variable resistor with a sol/button switch, the length of the bearing 14 is regulated by the operating stroke of the pull/button switch, and this reduces the overall length of this type of variable resistor. This was the bottleneck in making it smaller.

Fig. 4 shows another conventional example, in which the operating shaft 1 is
The diameter of the circular hole 15 of the bearing 14, which has the shape shown in FIG. 5 without the circular part IB as in the case shown in the figure, and whose length is shorter than the operating stroke (L) of the sol-butush switch, is set at the tip 15'. There is also a method in which the oval section IC of the operating shaft 1 is made smaller and the oval section IC of the operating shaft 1 is point-fitted and supported at this portion, but in this case, as shown in FIG. Since IC' is fitted, there is a drawback that the shaft shakes (shaft play) becomes large in the plane cutting direction of the shaft of the operating shaft 1 (in the force direction x-x' in FIG. 6).

(Objective of the invention) The present invention eliminates the above-mentioned drawbacks of conventional products, makes the bearing length of the operating shaft smaller than the stroke of the shaft moving back and forth, and also suppresses the vibration of the operating shaft. The present invention provides a rotary operation type electronic component that can move an operation shaft back and forth.

(Structure of the Invention) The present invention includes inserting an intermediate bushing having an oval hole into the front bearing of a rotary operation type electronic component capable of moving an operating shaft back and forth so that it can rotate but not move back and forth. Butshu's central oval shape JL? 'By supporting the operating shaft, it is possible to make the length of the front bearing smaller than the longitudinal stroke of the operating shaft.

(Description of Examples) Examples of the present invention will be described below with reference to the drawings.

FIG. 7 is a side sectional view of a rotary-operable electronic component according to an embodiment of the present invention, and parts having the same functions as those of the conventional example are given the same symbols. In the figure, reference numeral 17 denotes an intermediate pusher made of synthetic resin, etc., whose outer diameter root portion 20 is press-fitted into the circular hole 19 of the bearing 18 with a tight fit, and can rotate with an appropriate amount of rotational torque, but can move back and forth. It has an oval hole 21 in its center that penetrates and supports the oval portion IC of the operating shaft 1 as shown in FIG. (The appearance of the intermediate bushing 17 is shown in FIG. 8.) Furthermore, the oval-shaped portion I of the operating shaft 1
Similar to the conventional example, C is point-fitted and supported by the oval hole 23 of the rotating body 22 of the variable resistor section I so that it can move back and forth but rotates together in the rotational direction. The shaft support points of the oval hole 21 and the oval hole 23 of the rotating body 22 are provided at the front end of the intermediate bushing 17 and the rear end of the rotating body 22 so that the distance between them is as large as possible.

The configuration of the portion where the rear end ID of the operating shaft I engages with the driver 7 of the switch section H and the method of operating this variable resistor with a pull/button switch using the operating shaft are the same as in the conventional example.

The present invention is constructed as described above, and whether the operating shaft 1 is pushed in or pulled out as shown in FIG. Since the state in which it is supported by the hole 21 and the oval hole 23 of the rotating body 22 remains unchanged, the length of the bearing 18 is determined regardless of the operating stroke ('L) of the pull/button switch. Therefore, when trying to reduce the overall length of this type (variable resistor with pull/button switch), the bearing 1
The only restriction in the part 8 is the thickness of the intermediate bushing 17, which is very advantageous compared to the conventional method.

In addition, the operating shaft l
The oval hole 21 of the intermediate bushing 17 supporting the oval portion IC and the oval hole 23 of the rotating body 22 have the same shape as the shaft, and as in the second conventional example, the oval hole 21 of the intermediate bushing 17 and the oval hole 23 of the rotating body 22 have the same shape as the shaft. I never get angry.

Further, by imparting elasticity to the root portion 20 of the intermediate bushing 17 made of synthetic resin and press-fitting it into the circular hole 19 of the bearing 18, the rotational torque of the operating shaft 1 can be set to an appropriate level.

(Effects of the Invention) As explained above, according to the present invention, rotation operation is possible in which the bearing length of the operating shaft is made smaller than the stroke in which the shaft moves back and forth, and the vibration of the operating shaft can be kept small. We can provide type electronic components.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of the conventional example (with the operating shaft pushed in)
, Fig. 2 is an external view of the operating shaft of the conventional example, Fig. 3 is a side sectional view of the same conventional example (with the operating shaft pulled out), Fig. 4 is a side sectional view of another conventional example, and Fig. 5 is a side sectional view of the conventional example. FIG. 6 is an explanatory view of the operating shaft support of another conventional example and the embodiment of the present invention. FIG. 7 is a side sectional view of the embodiment of the present invention. FIG. 8 is an external view of the intermediate bushing of the same embodiment. 1... Operating axis, IA... External operating section, IB... Circular part, IC... Oval shaped part, 2, 22... Rotating body, 3.
...Slider, 7.Driver, 8.Reversal spring, 9.
... Contact holder, 10... Movable contact, 11, 12, 1
3... Fixed contact, 14.18... Bearing, 15.19
...Circular hole, 16°21.23...Oval hole, 17
...Intermediate bush. Figure 1 Figure 2 Figure 3 Figure 4 Figure 6

Claims (3)

[Claims] (1) A front bearing with a circular hole, an operating shaft that has an operating part protruding from the bearing to the outside and an extension part of an oval shape to the inside, and although it is possible to rotate with respect to the circular hole of the bearing, it cannot move forward or backward. an intermediate bush that is fitted and held so as not to move and has an oval hole for supporting the shaft in the center; and an intermediate bush that is held rotatably on the same center line as the bearing and has an oval hole for supporting the shaft in the center It is composed of a rotating body holding a movable contact, and a shaft regulating part that is attached to the rear of the rotating body and restricts the back and forth movement of the operating shaft. A rotatable electronic component that is supported so that it can freely move back and forth. (2) The shape of the intermediate bush and the oval hole for supporting the operating shaft in the center of the rotating body is changed so that the front end of the intermediate bush is small and the other parts are large, and the rear end of the rotating body is small and the other parts are large. The rotary operation type electronic component according to claim 1, characterized in that the operation shaft is point-fitted and supported at the portion. (3) The intermediate bush is formed from a molding material such as synthetic resin,
The intermediate bush is tightly fitted into the bearing circular hole, thereby increasing the sliding friction force therebetween and increasing the rotational torque of the operating shaft. Rotationally operated electronic component according to item (2).