JPS6031204Y2 - Rotating variable resistor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary variable resistor, and more particularly, to providing a two-axis, dual-unit independently operating type.

Conventionally, in this type of variable resistor, for example, as shown in FIG. The receivers 5 and 13 correspond in parallel to the insulating substrates 4 and 12 attached to the respective covers 8 and 14, and one slider receiver Ij5 is associated with the outer shaft 2 supported on the bearing 3,
The other slider receiver 13 is operated in association with the inner shaft 1 passing through the insulating substrates 4, 12, and the slider receiver 13 is operated in association with the inner shaft 1 passing through the insulating substrates 4, 12.
6' independently corresponds to terminals 7, 15 on the corresponding insulating substrates 4, 12.
The resistance values of the variable resistors A and B are adjusted independently by sliding on a resistor (not shown) that is electrically connected to the variable resistor A and B.

However, in this conventional example, the covers 8 and 14 of the variable resistors A and B are separate, and the slider receivers 5 and 13 are separate.
A cover 8 that cooperates with the protrusions 5a and 13a to restrict rotation.
, 14 stopper part 8a.

14a is also provided on a separate cover, and depending on variations in component dimensions, etc., the slider receivers 5 and 13 of the variable resistors A and B in the front and rear stages, and the corresponding inner and outer shafts 1,
There is a disadvantage that an error in the rotation angle of 2 occurs, and furthermore,
Since the covers 8 and 14 are stacked in parallel in two stages, the depth of the main body is large, and the cover 8 has a bulge 8.
b and various mounting fittings, such as washers 9, springs 10,
It is necessary to use the mounting plate 11, spacer 16, etc., which makes it difficult to respond to miniaturization, has a large number of parts, and is complicated to assemble.

The present invention is intended to eliminate the drawbacks of the above-mentioned conventional example, and will be explained in detail below with reference to FIGS. 2 to 4.
20 is an inner shaft that is attached to a common cover 29 and passes through a pair of insulating substrates 23 and 26 arranged oppositely in the cover 29; a slider receiver 27 is attached to the inner shaft 20;
The tip portion 20c is supported by a bearing 30, and a leaf spring 32
The bearing 30 is rotatably locked by a stop plate 33 via a mounting plate 31, and the bearing 30 is fixed to the back surface of the insulating substrate 26 by a mounting plate 31.

Reference numeral 21 is an outer shaft supported by a bearing 22 fixed to the back surface of an insulating substrate 23, and its tip 21a is an outer shaft attached to a slider receiver 25. The sliders 28 and 28' are fixed to each other, and these sliders 28 and 28' are connected to resistors (Fig. (not shown) to adjust the resistance value by sliding independently on them in response to rotation of their respective shafts 21,22.

Further, the slider receivers 25 and 27 are provided with protrusions 25a and 27a at corresponding positions, respectively, and these protrusions are similar to the cut and bent protrusions 29 provided on a part of the peripheral surface of the common cover 29.
a at the same time at a predetermined position, and the slider receivers 25, 2
7 rotation is regulated.

In the above invention, one slider receiver 25 is connected to the outer shaft 2.
1, the outer shaft 22
As shown in FIG. 3, the other slider receiver 27 becomes rotatable by fitting into the thin diameter part 20b which is machined by grinding on the large diameter part 20a of the inner shaft 20. It is supported by the step portion 20d in FIG. 4 and the bearing 30, and is prevented from coming off in the axial direction.

Note that 29b is a joint portion of the cover 29.

That is, according to the present invention, a pair of insulating substrates 23 and 26 in which respective resistors are formed are attached to the open ends of a common cover 29, and a pair of slider receivers 25 and 27 are attached to the common cover 29. The slider receivers 25 on one side are associated with one of the shafts 22, the slider receivers 27 on the other side are associated with the other shaft 20, and the slider receivers 25 are associated with one shaft 22, and the slider receivers 27 are associated with the other shaft 20, so that the respective associated shafts They are rotated independently, and at a predetermined rotational position, they come into contact with the common stopper protrusion 29a of the cover 29, and their rotation is restricted at the same time and at the same position.
Not only can rotational misalignment due to variations in component dimensions be prevented as much as possible, but space can also be made smaller by housing the variable resistors, which were conventionally separated into front and rear stages, within one cover 29. It has great practical value, as it makes it possible to assemble and is easy to assemble.

It should be noted that what is shown in FIGS. 5 and 6 is another embodiment of the present invention, and the same parts are given the same symbols. In this embodiment, as shown in FIG. A plurality of protrusions 29c are cut and bent inwardly from the side wall of the cover 29,
On the protruding piece 29c, there is a notch 34a on the outer peripheral surface that engages with the bending protrusion 29a for the stopper of the cover, and a shaft hole 34 in the center.
A leaf spring 34 having a diameter b is disposed, and the cylindrical leg portion 27c of one slider receiver 27 is brought into contact with the leaf spring 34 as shown in FIG. An appropriate rotational torque is applied to the receiver 27.

Further, in this embodiment, the tip end of the inner shaft 20 is rotatably locked to a mounting plate 31 disposed on one insulating substrate 26 by fitting a speed nut 32, for example.
The shaft may be fixed with a C ring or a C ring in place of the speed nut.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional variable resistor, Figs. 2 to 4 show an embodiment of the variable resistor of the present invention, Fig. 2 is a sectional view, and Figs. 3 and 4 are essential parts. 5 and 6 show other embodiments, FIG. 5 is a sectional view, and FIG. 6 is an exploded perspective view of the main parts. 20...Inner shaft, 21・curved・outer shaft, 22,30・
...bearing, 23.26...curved insulating board, 24,
24'...Terminal, 25, 27...Slider receiver, 25a. 27a...protrusion, 2B, 28'...slider, 29...cover, 29a...cut and bent protrusion, 29c... ... cut and raised protrusion piece, 31.
...Mounting plate, 32...Bending elastic member, 33...
...Stopping plate, 34...Plate spring.

Claims (1)

[Scope of utility model registration request] A pair of insulating substrates are attached to the open end of a common cover, and a pair of slider receivers corresponding to the insulating substrates are arranged inside the common cover, one slider receiver is attached to the inner shaft, and the other slider receiver is attached to the inner shaft. The slider receiver is attached to the outer shaft, and each slider receiver can be rotated independently by the inner and outer shafts, and the protrusions with each slider receiver are attached to the common cut-and-fold protrusion of the above cover. A rotary variable resistor characterized in that it can be engaged.