JPS5838564Y2 - variable resistor - Google Patents

Description

[Detailed explanation of the invention] This invention adjusts a predetermined level on the outer shaft in advance,
This invention relates to a variable resistor configured so that when a preset level point is reached on an inner axis, a click mechanism operates to recognize a predetermined level and mechanically obtain level reproducibility.

Conventional variable resistors of this type have a click plate fixed to one of the inner or outer shaft and a click spring fixed to the other, with a groove provided on the click plate and a convex portion on the click spring, which slide against each other to reproduce a predetermined reproduction. I'm trying to get sex.

However, in this case, since a click mechanism is provided on the click plate, there is a drawback in that it is difficult to obtain a correlation between the outer shaft rotation stop and the click in terms of its angular accuracy, particularly in the starting and ending rotation positions.

This invention was created with these points in mind.
One embodiment will be described below with reference to the drawings.

In the figure, 1 is a click part, and 2 and 3 are variable resistor parts.

Reference numeral 4 denotes a click spring fixed to the tip of the outer shaft 5, and as the outer shaft 5 rotates, the protrusion γ provided at the tip of the arm 6 moves over the circumferential band-shaped convex portion 9 provided integrally with the inner shaft 8. The click groove 10 and the protrusion 1 formed in a part of the band-shaped convex part 9 slide on each other.
are engaged to obtain a predetermined click action.

The protrusion 12 of the rotation stop plate 11 fixed to the tip of the outer shaft 5 together with the click spring 4 is a protrusion 1 provided on the housing 13.
4 and regulates the rotation angle of the outer shaft 5.

Reference numeral 15 denotes an inner shaft holding double bearing, which is fixed to the intermediate shield plate 16 by caulking, and comes into contact with the lower surface stepped portion 17 of the band-shaped convex portion 9 to prevent the inner shaft 8 from pushing in the axial direction. There is.

Reference numeral 18 denotes a friction spring having spring properties that is in sliding contact with the rotating mountain plate 11 and in contact with the shield plate 19 at the other end opposite to the sliding contact portion, and holds the rotational torque of the outer shaft 5 and maintains the rotational torque of the inner shaft 8. It has a higher torque than rotational torque and prevents the inner shaft 8 and outer shaft 5 from rotating together.

Reference numeral 20 denotes a bearing that rotatably fits and holds the outer shaft 5, and this bearing 20 is fixed to the shield plate 19.

A brush mounting plate 22 is fixed to the tip split portion 21 of the inner shaft 8, and a protrusion (not shown) of this brush mounting plate 22
and the protruding portion 24 of the housing 23 come into contact with each other, thereby regulating the rotation angle of the variable resistor.

A brush mounting plate 25 is fixed to the inner shaft 8 at the tip of the brush mounting plate 22, and these brush mounting plates 22.25
A brush is fixed to each of the insulating substrates 26 and 27, and the brush contacts and slides on a horseshoe-shaped resistor provided on the insulating substrates 26 and 27 as the inner shaft 8 rotates.

Further, although not shown in the drawings, the substrates 26 and 27 are equipped with contacts that are constantly in contact with the brush, and external terminals are drawn out from both ends of the resistor and from the contacts to the outside of the casings 23 and 28. .

Further, the click section 1 and the variable resistors 2 and 3 are connected by appropriate means.

In such a configuration, when the outer shaft 5 is set at an arbitrary angle and the inner shaft 8 is rotated, the protrusion 1 of the click spring 4 is inserted into the click groove 10 integrally provided on the inner shaft 8 at the set angle. and get a click action.

In particular, when the inner shaft 80 is in the clockwise and fully counterclockwise positions of the outer shaft 5, the click groove 10 and the fixing split portions 21 of the brush mounting plate 22 are integrally formed in the inner shaft 8 in the clockwise and fully counterclockwise positions. Because of this structure, a reliable lick action can be obtained from the beginning and end.

The present invention is structured as described above, and includes
A click groove is provided on the band-shaped protrusion provided integrally with the shaft to form a click mechanism, and the step on the lower surface of the band-shaped protrusion serves as a mechanism for holding the inner shaft in the axial direction, greatly reducing the number of component parts. This is the result.

Furthermore, since the click groove is integrated with the inner shaft, there is no component integration error and highly accurate level reproducibility is achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a variable resistor according to the present invention, and FIG. 2 is an exploded perspective view of the same essential parts. 4...'...Click spring, 5...Outer shaft, 7
...Protrusion, 8...Inner shaft, 9...
... Band-shaped convex portion, 10... Click groove, 15...
...Bearing for holding the inner shaft, 1γ...Bottom step.

Claims (1)

[Scope of utility model registration request] A click spring with a protrusion at the tip is fixed to the outer ring that can be set at any angle, and a belt-shaped protrusion with a click groove is integrally attached to the inner shaft, which is attached to the outer shaft so that it does not rotate together. The step on the lower surface of the band-shaped protrusion is brought into contact with the inner shaft holding bearing to hold down the inner shaft in the axial direction, and the band-shaped protrusion of the inner shaft and the protrusion of the click spring are in contact with each other. A variable resistor configured to slide against each other and fall into a click groove of a band-shaped convex portion of the protruding portion to recognize a predetermined click position.