JPS6129062Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a two-unit variable resistor that is attached to the first rotating shaft and the second rotating shaft of a two-unit variable resistor in which the first rotating shaft and the second rotating shaft are coaxially provided. Concerning knob improvements.

Conventionally, this type of knob is fixed to the first rotating shaft and the second rotating shaft, respectively, but as a variable resistor,
Normally, in the case of a model in which the first rotation axis and the second rotation axis are linked, it is easy to rotate the two knobs at the same time, but it is easy to rotate the first rotation axis and the second rotation axis independently. When you want to rotate, you have to hold down one knob and rotate the other knob. In addition, in the case of a single-acting type variable resistor configured so that the first rotation shaft and the second rotation shaft can rotate independently, it is easy to rotate each knob independently, but the first rotation shaft
When rotating the rotating shaft and the second rotating shaft at the same time,
Since both knobs must be rotated at the same time, the rotation angle of both knobs tends to vary.

Therefore, the present invention attempts to solve the above-mentioned drawbacks, and its purpose is to reliably rotate the first rotation shaft and the second rotation shaft of a double variable resistor at the same time. Works as an interlocking knob,
To provide a knob for a variable resistor which allows one knob to be rotated easily and reliably without pressing the other knob when rotating the rotating shaft independently.

Hereinafter, the present invention will be explained with reference to the embodiments shown in the drawings. FIG. 1 is a cross-sectional view of the variable resistor knob according to the present invention in a state in which it is operated as an interlocking knob, and FIGS. The cross-sectional views taken along the - line and - line in the figure, and FIGS. 4 and 5 respectively show cross-sectional views in a state in which the variable resistor knob is operated independently.

In the above drawing, 1 is a double variable resistor, and this variable resistor 1 is the first variable resistor arranged on the same axis.
The rotary shaft 2 and the second rotary shaft 3 are of a single-acting type configured to rotate independently, and are fixed to a chassis 4.

A first stopper 5 is fitted and fixed to the shaft end of the first rotating shaft 2 through its cylindrical portion 6 so as to be able to rotate integrally with the first rotating shaft 2, and the outer periphery of the cylindrical portion 6. Guide grooves 6a and 6b are formed in the surface along the axial direction of the first rotating shaft 2, respectively, at opposing positions on the diametrical line. Reference numeral 7 denotes a disk portion connected to the rear end of the cylindrical portion 6.
8 is a first knob, and the first knob 8 has an inner cylindrical portion 9.
The inner surface of the inner cylinder part 9 is provided with ridges 9a, which are slidably fitted into the guide grooves 6a, 6b of the cylinder part 6.
9b is provided in a protruding manner, whereby the first knob 8 slides on the cylindrical portion 6 only in the axial direction of the first rotating shaft 2, and the first knob 8 slides on the cylindrical portion 6 only in the axial direction of the first rotating shaft 2. 2
It is set to rotate together with the Further, the first knob 8 has a front part thereof and a first stopper 5.
The variable resistor 1 is always biased forward, that is, in the direction of the variable resistor 1, by a spring 10 interposed between the variable resistor 1 and the variable resistor 1. 11 is the outer cylinder part of the first knob 8;
The inner diameter of the outer cylindrical portion 11 is set to be slightly larger than the diameter of the disc portion 7 of the first stopper 5 so as not to impede the sliding movement of the first knob 8.
Further, a friction surface 12 having a tapered inclined surface is formed between the outer cylindrical portion 11 and the front surface of the first knob 8.

Next, a second stopper 13 is fitted and fixed to the shaft end of the second rotating shaft 3 through its cylindrical portion 14 so as to be able to rotate together with the second rotating shaft 3. Guide grooves 14a and 14b are formed on the outer circumferential surface along the axial direction of the second rotating shaft 3, respectively, on the diameter line thereof. Reference numeral 15 denotes a flange portion integrally formed and connected to the rear end of the cylindrical portion 14, and a hole 15a is opened in the center of the flange portion 15, into which the first rotating shaft 2 is rotatably inserted. 16 is a disk portion fixed to the front end of the cylindrical portion 14. In addition, the above flange portion 15
is the forward movement of the first knob 8 and the second knob 17, which will be described later.
It is intended to restrict the regression of 2nd above
The knob 17 is slidably fitted into the cylindrical portion 14 through its inner cylindrical portion 18, and the guide groove 1 of the cylindrical portion 14 is formed on the inner surface of the inner cylindrical portion 18.
A ridge 18 that slidably fits into 4a and 14b.
a, 18b are provided in a protruding manner, so that the second knob 17 slides on the cylindrical portion 14 only in the axial direction of the second rotation shaft 3, and in the rotation direction, the second knob 17 slides on the cylindrical portion 14 only in the axial direction of the second rotating shaft 3. It is set to rotate integrally with the rotating shaft 3. Further, the second knob 17 is always urged backward, that is, in a direction away from the variable resistor 1, by a spring 19 interposed between the rear part of the knob 17 and the disk portion 16 of the second stopper 13. ing. Furthermore, the second
At the rear of the knob 17, there is a friction surface 20 having a shape that makes surface contact with the friction surface 12 formed at the front of the first knob 8.
is formed.

Next, the operation of the variable resistor knob of the present invention will be explained.

First, the case where the first rotating shaft 2 and the second rotating shaft 3 are rotated at the same time will be explained. In this case, as shown in FIG. 1, the friction surface 1 of the first knob 8
2 and the friction surface 20 of the second knob 17 are in surface contact by the elastic force of the springs 10 and 19, respectively, and when either the first knob 8 or the second knob 17 is rotated, this rotation The force is on both friction surfaces 12, 20
, to the other knob 8 or 17, so that both knobs 8 and 17 rotate at the same time, and therefore, the first rotation shaft 2 and the second rotation shaft 3 rotate at the same time.

Next, referring to FIG. 4, when only the first rotation shaft 2 is to be rotated, when the first knob 8 is pulled in the direction of the arrow in the figure, the second knob 17 is moved from the flange portion 15 of the second stopper 13. Since movement in the direction of the arrow is prevented, both the friction surfaces 10 of the first knob 8 and the second knob 17
and 20 are separated. Therefore, when the first knob 8 is rotated while being pulled, the rotational force is applied to the second knob 1.
7, the second rotating shaft 3 does not rotate and only the first rotating shaft 2 rotates.

Next, when rotating only the second rotating shaft 3,
As shown in FIG. 5, the second knob 17 and the arrow direction,
That is, when pushed in the direction of the variable resistor 1, the first knob 8 is prevented from moving in the direction of the arrow by the flange portion 15 of the second stopper 13.
Both friction surfaces 10 and 20 of the knob 8 are separated. Therefore, when the second knob 17 is rotated while being pressed, the rotational force is not transmitted to the first knob 8, so the first rotation shaft 2 does not rotate, and only the second rotation shaft 3 rotates.

As mentioned above, the present invention is a dual variable resistor 1 in which a first rotating shaft 2 and a second rotating shaft 3 are coaxially provided.
and a first knob 8 fitted onto the first rotating shaft 2 so as to be slidable in the axial direction of the first rotating shaft 2 and rotate integrally with the shaft 2, and regulating the retracting range of the first knob 8. a first stopper 5 fixed to the first rotating shaft 2;
Spring 10 that urges the first knob 8 forward
, a second knob 17 fitted onto the second rotating shaft 3 so as to be slidable in the axial direction of the second rotating shaft 3 and rotate integrally with the second rotating shaft 3; a retracting range of the second knob 17; A second stopper 13 that restricts the forward movement range of the knob 8
and a spring 19 that biases the second knob 17 in the rear direction, and a friction surface 12 that makes surface contact with the first knob 8 and the second knob 17 to rotate both knobs 8 and 17 together. 20.
Therefore, the first knob 8 and the second knob 17 normally rotate together as interlocking knobs by the springs 10, 19 and the friction surfaces 12, 20 without variation in rotation angle. When rotating only one of the first knob 8 and second knob 17, the friction surfaces 12 and 12 of both knobs 8 and 17 are rotated by pushing or pulling the knob.
20 can be easily rotated without pressing the other knob. Furthermore, the structure is simple, the size is not much different from a conventional double knob, and it is easy to install and remove. Further, since the double variable resistor 1 does not require anything special, it is highly versatile.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the variable resistor knob according to the present invention operating as an interlocking knob, and FIGS. 2 and 3 are sectional views taken along lines - and - in FIG. 1, respectively, and FIGS. FIG. 5 is a cross-sectional view of the variable resistor knobs in a state in which they are individually operated. 1...Double variable resistor, 2...First rotating shaft,
3... Second rotating shaft, 5... First stopper, 8...
1st knob, 10, 19...Spring, 12, 2
0...Friction surface, 13...Second stopper, 17...
Second knob.

Claims (1)

[Scope of utility model registration request] 2 in which the first rotation axis and the second rotation axis are coaxially provided.
A variable resistor, a first knob fitted on the first rotating shaft so as to be slidable in the axial direction of the first rotating shaft and rotate integrally with the shaft, and for regulating a retraction range of the first knob. A first stopper fixed to the first rotating shaft, a spring that biases the first knob in the forward direction, and a first stopper fixed to the second rotating shaft so as to be slidable in the axial direction of the second rotating shaft and rotate integrally with the second rotating shaft. a fitted second knob;
a second stopper that restricts the retraction range of the knob and the forward movement range of the first knob; a spring that biases the second knob in the rearward direction; and friction that is formed on the first knob and the second knob and that are in surface contact with each other. A variable resistor knob consisting of a surface and a surface.