JPH0353764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a variable resistor in the field of electronic components.

Conventional configurations and their problems In recent years, there has been a demand for variable resistors that have a reduced number of component parts, are equipped with an operating shaft, and are dust-proof.

Hereinafter, a conventional variable resistor will be explained with reference to the drawings.

FIG. 1 and FIG. 2 show a top view and a sectional view, respectively, of a conventional variable resistor. In FIGS. 1 and 2, reference numeral 1 denotes an insulating base material with a through hole 1a provided in the center, and terminals 2a and 2b formed at both ends around the through hole 1a on one main surface of the base material 1. Horseshoe-shaped resistor films 3 connected to each other are formed. A ring-shaped seat plate 4 made of an insulating material is placed on one main surface of the base material 1, and has a spring property on the seat plate 4, and is pressed against the resistor coating 3 on the base material 1. A slider 5 provided with contacts 5a is placed thereon, and an inner terminal 6 is provided on the other main surface of the base material 1, and the inner terminal 6, the base material 1, the seat plate 4, and the sliding Child 5
The mounting bracket 7 penetrates through the engagement hole 5 of the slider 5.
b, and is rotatably attached to the base material 1 by caulking.

Here, by engaging a screwdriver or the like with the engagement hole 5b of the slider 5 and rotating it, the contact 5a of the slider 5 slides on the resistor coating 3 to achieve a desired resistance. value can be obtained.

However, the above configuration has a drawback in that the vicinity of the contact 5a of the slider 5 and the sliding portion of the resistor coating 3 is not dust-proofed.

Purpose of the Invention In view of the above drawbacks, the present invention reduces the number of parts,
The present invention provides a variable resistor that is equipped with an operating shaft and is dust-proof.

Structure of the Invention In the variable resistor of the present invention, a slider is disposed between a resistor and a conductive material, and the conductive material is connected to the slider and the resistor on which the slider slides. It covers the body and is formed with a protruding constriction part having a through hole in the center, and includes an integrated operating shaft that passes through the through hole for driving the slider and sandwiches at least the conductive material. ing.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

3 and 4 are a top view and a sectional view, respectively, of a variable resistor in the first embodiment of the present invention.
FIG. 5 shows a resistor 12 and an electrode 13a on a base material 11,
It is a top view which shows the state which formed 13b. Third
5 to 5, reference numeral 11 is an insulating base material with a through hole 11a provided in the center, electrodes 13a and 13b on one main surface of the base material 11, and electrodes 13a and 13b on both ends of the base material 11.
Horseshoe-shaped resistor 1 connected to each of a and 13b
2 is formed. Further, 14 is a conductive material, and a fixing member 14c formed on this conductive material 14
the resistor 1 so as to cover the resistor 12 by
2 and is fixed to the base material 11. Note that a constricted portion 14a is formed in the conductive material 14 so as to protrude, and a through hole 14b is formed in the center of the constricted portion 14a.

Reference numeral 15 designates an integrated operating shaft that forms operating grooves 15a and 15b and rotatably sandwiches the through hole 14 of the conductive material 14. Furthermore, this operating shaft 15 is formed between the base material 11 and the conductive material 14. It passes through the through hole 16b of the slider 16 provided therebetween and the through hole 11a of the base material.

The slider 16, which is driven by the operation shaft 15 made of a conductive material and has spring properties, is covered with the constricted portion 14a together with the resistor 12,
It also has a contact 16a that slides on the resistor 12 and a contact 16c that contacts the conductive material 14, and is provided to rotate together with the operating shaft 15. Each of the electrodes 13a and 13b has a terminal 1.
7a and 17b are connected. Here, by engaging a screwdriver or the like with the operating groove 15a or 15b of the operating shaft 15 and rotating it, the contact 16a of the slider 16 slides on the resistor 12 to achieve a desired resistance. value can be obtained.

As described above, according to this embodiment, the base material 11 has the resistor 12 formed on one principal surface, and the resistor 12
The slider 1 is arranged between
6 is disposed together with the resistor 12 so as to be covered with the conductive material 14, and the conductive material 14 has a narrowed portion 14a.
is formed to protrude, and a through hole 14b is formed in the center of the constricted portion 14a, and an integrated operation shaft 15 is rotatably provided by penetrating the through hole 14b and sandwiching the conductive material 14. By doing so, it is possible to reduce the number of parts, and obtain a variable resistor which is equipped with an operation shaft and which is dust-proofed by covering the resistor 12 and the slider 16 with the conductive material 14.

Next, a second embodiment of the present invention will be described with reference to the drawings.

6 and 7 are a top view and a sectional view, respectively, of a variable resistor showing a second embodiment of the present invention.

In FIGS. 6 and 7, 11 is a base material, 11a
12 is a through hole in the base material 11, 12 is a resistor, and 17 is a through hole in the base material 11.
a and 17b are terminals, 16 is a slider, 16a is a contact, 16b is a through hole of the slider 16, and 16c is a contact, and the above structure is similar to that shown in FIGS. 3 and 4. The difference from the above structure is that the base material 1
A fixing claw 14c for fixing with 1 is formed,
Further, a first constricted portion 14a is formed to protrude from the conductive material 14 covering the resistor 12 and the slider 16, and is located opposite to the first constricted portion 14a at the center of the first constricted portion 14a. second constriction section 1 in the direction
4a' is formed to protrude, a through hole 14b is formed in the center of the second constricted part 14a', and an integral operating shaft 15 with operating grooves 15a and 15b is formed in the second constricted part 14a'. 14a' through hole 14
b, the through hole 16b of the slider 16, and the through hole 11a of the base material 11 to pass through the conductive material 14.
and said conductive material 14 by sandwiching said slider 16.
The slider 1 is rotatably provided with respect to the slider 1.
6 is provided so as to rotate together with the operating shaft 15. Here, the operating groove 15 of the operating shaft 15
By engaging a screwdriver or the like with a or 15b and rotating it, the contact 16a of the slider 16 is
can be slid on the resistor 12 to obtain a desired resistance value.

As described above, according to this embodiment, the base material 11 has the resistor 12 formed on one main surface, and the conductive material 14 is fixedly provided to the base material 11 facing the resistor 12. A slider 16 is disposed between the conductive material 14, and a second constricted portion 14a' is formed protruding from the conductive material 14, and a through hole is formed in the center of the second constricted portion 14a'. 14b is formed, and a rotatable integrated operation shaft 15 that passes through this through hole 14b and sandwiches the conductive material 14 and the slider 16 is provided, thereby reducing the number of parts and improving operation. With a shaft and a conductive material 14 and a resistor 1
2 and the slider 16 can be covered to provide a dustproof variable resistor.

In the first embodiment, the operating shaft 15 is provided by sandwiching the conductive material 14, but it may also be provided by sandwiching the conductive material 14 and the slider 16.

Further, in the second embodiment, the operating shaft 15 is provided with the conductive material 14 and the slider 16 sandwiched between them, but the conductive material 14 and the slider 1
It goes without saying that the base material 6 and the base material 11 may be sandwiched between them.

Effects of the Invention As described above, the present invention includes an insulating base material having a resistor formed on one principal surface, and a conductive material facing the resistor and fixed to the base material. a slider is disposed between the conductive material and the conductive material, and a constricted portion having a through hole in the center is formed protrudingly from the conductive material;
By providing an integrated operating shaft that passes through the through hole and rotatably holds at least the conductive material, stable rotation (operation) of the operating shaft is achieved.
It is possible to obtain a variable resistor that provides tactile sensation, reduces the number of parts, and is dust-proofed between the operating shaft and the through hole, and has great practical effects.

[Brief explanation of drawings]

1 and 2 are a top view and a sectional view, respectively, of a conventional variable resistor, and FIGS. 3 and 4 are a top view and a sectional view, respectively, of a variable resistor according to a first embodiment of the present invention, FIG. 5 is a top view showing a state in which a resistor and electrodes are similarly formed on a base material, and FIGS. 6 and 7 are a top view and a sectional view, respectively, of a variable resistor according to a second embodiment of the present invention. be. DESCRIPTION OF SYMBOLS 11... Base material, 12... Resistor, 14... Conductive material, 14a... First constricted part, 14a'... Second constricted part, 14b... Through hole in conductive material, 15... Operation Shaft, 16...slider.

Claims (1)

[Claims] 1. An insulating base material with a resistor formed on one main surface, and a protruding resistor that faces the resistor and is fixed to the base material and has a through hole in the center. a conductive material having a constriction portion that covers the body; a conductive slider that slides on the resistor; and a conductive slider that drives the slider and passes through the through hole to freely rotate at least the conductive material. A variable resistor consisting of an integrated operating shaft inserted between the two.