JPH09270307A - Potentiometer - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] In a potentiometer used for a jog shuttle of a video device, a controller of a game machine, or the like,
The purpose is to provide a device that has little influence on the output characteristics. A sloped portion 25 of a rotor 23 and a substrate 17
The strain detecting element 21 of the cantilever 20 of FIG.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a potentiometer used for a jog shuttle for video equipment, a controller for game equipment, and the like.

[0002]

2. Description of the Related Art A conventional potentiometer is disclosed in Japanese Patent Application No.
The one disclosed in the microfilm of No. 42629 (Shokai 56-143805) is known.

Below, regarding the conventional potentiometer,
This will be described with reference to the drawings. FIG. 9 is a sectional view of a conventional potentiometer.

In the figure, reference numeral 1 is a housing having one end having a mounting hole 3 into which the rotary shaft 2 is inserted and the other end having an open surface. Reference numeral 4 denotes a rotating body that is housed inside the housing 1 and is fitted to the end so as to rotate with the rotating shaft 2. Reference numeral 5 denotes a slider provided on the rotating body 4 so as to project toward the inner surface of the housing 1. Reference numeral 6 denotes a substrate having a resistance element 7 electrically connected to the slider 5 of the rotating body 4 between the inner wall of the housing 1 and the rotating body 4 and having the rotating shaft 2 fitted in substantially the center thereof. . Reference numeral 8 is a lid provided so as to close the open surface of the housing 1.

[0005]

However, in the above conventional structure, the slider 5 provided on the rotating body 4 slides on the resistance element 7 of the substrate 6 as the rotating shaft 2 rotates.
When it is used for a long time, the slider 5 and the resistance element 7 are slidingly worn to generate wear powder, and this wear powder is deposited on the resistance element 7 to affect the output characteristics.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a potentiometer having less influence on the output characteristics.

[0007]

In order to achieve the above object, the present invention has a cantilever having a through hole that fits with the outer periphery of a bearing of a mounting base and a strain detecting element and a circuit pattern on the side. And a rotor having a shaft portion that fits with the bearing of the mounting base and an inclined surface portion that abuts the cantilever on the outer periphery.

According to the present invention, it is possible to provide a potentiometer with less influence on the output characteristics.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention has a mounting base having a bearing projecting to the upper surface in the approximate center, and a through-hole fitted in the center of the outer periphery of the bearing of the mounting base. A substrate provided with a cantilever having a strain detecting element and a circuit pattern on its side, and a sloped portion having a shaft portion that fits with the bearing of the mounting base and contacting the cantilever on the outer periphery. And a cover provided so as to cover at least the rotor.

Further, the invention according to claim 2 is provided with a mounting base having a projecting portion on the upper surface, and a cantilever beam having a strain detecting element and a circuit pattern on the side surface provided on the upper surface of the mounting base. The rotor includes a substrate, a rotor having an axis in the center and an inclined surface portion that contacts the cantilever on the outer periphery, and a cover provided so as to cover at least the rotor.

[0011] The invention according to claim 3 is based on claim 1.
Alternatively, a spring is provided between the rotor of the invention described in 2 and the cover so as to urge it.

The above-mentioned structure has the effect that the output characteristics are less affected.

(First Embodiment) A potentiometer according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a potentiometer according to a first embodiment of the present invention, and FIG. 2 is a sectional view of the same.

In the figure, reference numeral 11 has a bearing 14 having a recess 13 provided so as to project to the projecting portion 12 on the upper surface at substantially the center and side portions, and 2 projecting from the projecting portion 12 toward the outer periphery on the upper surface. It is a mounting base made of resin or the like having two protrusions 15. Reference numeral 16 denotes a terminal which is inserted from the lower surface of the mounting base 11 in the vicinity of the bearing 14 of the protruding portion 12. Numeral 17 has first and second through holes 18 and 19 for fitting the outer periphery of the bearing 14 of the mounting base 11 and the terminal 16 at substantially the center, and the outer periphery is in contact with the two projections 15 of the mounting base 11. It is a Y-shaped substrate made of a resin such as phenol or glass epoxy, or a ceramic, etc., provided with two cantilever beams 20 provided so as to be in contact with each other. On the surface of the substrate 17 facing the mounting base 11, each of the two cantilever beams 20 has a strain detecting element 21 such as a strain gauge, and
A desired circuit pattern 22 electrically connected to the terminal 16 through the second through hole 19 is provided. Reference numeral 23 has a central shaft portion 24 made of metal or resin which is inserted into the first through hole 18 of the substrate 17 and is fitted into the recess 13 of the bearing 14 of the mounting base 11 to rotate. It is a cylindrical rotor made of resin or the like having a sloped portion 25 so as to be fitted to the shaft portion 24 and come into contact with the cantilever 20 of the substrate 17 on the upper surface. At the tip of the inclined surface portion 25 of the rotor 23, there is provided a rotation restricting portion 26 that comes into contact with the side surface of the protrusion 15 of the mounting base 11 and restricts the rotation operation of the rotor 23. 27
Is an insertion hole 2 through which the shaft portion 24 of the rotor 23 is inserted substantially at the center.
8 is a cover made of resin, metal or the like that is provided so as to cover at least the rotor 23.

The assembling method of the potentiometer according to the first embodiment of the present invention constructed as above will be described below.

An adhesive or the like is applied to the protruding portion 12 of the mounting base 11 in which the terminal 16 is insert-molded in advance, and the mounting base 1
1 outer circumference of the bearing 14 and the first through hole 18 of the board 17, and the terminal 16 of the mount 11 and the second through hole 19 of the board 17.
The board 17 is fixed so that and fit together. Then, the shaft portion 24 of the rotor 23 is inserted into the concave portion 13 of the bearing 14 of the mounting base 11, and the mounting base 1 is covered so as to cover the rotor 23.
The cover 27 is caulked and fixed to the outer periphery of the No. 1.

The operation of the potentiometer according to the first embodiment of the present invention configured as above will be described below.

When the shaft portion 24 protruding from the center of the cover 27 is rotated, the rotor 23 provided integrally with the shaft portion 24.
Also rotates, and the slope 25 of the rotor 23 rotates. The cantilever 20 that is in contact with the slope 25 of the rotor 23 is displaced according to the amount of rotation of the shaft 24, and the resistance value of the strain detection element 21 provided on the cantilever 20 changes. The terminals 16 electrically connected to the circuit pattern 22 of the board 17 to change the resistance value of the strain detecting element 21 are respectively connected to the power source, GND and output terminal of the external system, and the rotation amount of the shaft portion 24. That is, the slope of the slope portion 25 of the rotor 23 changes the resistance value of the strain detecting element 21, and the output signal is output to the terminal 16
Output more. In addition, when one is rotated, one cantilever 20
Of the cantilever 20 changes when the other of the cantilever beams 20 changes, so that the output signal changes with the rotation of the shaft 24 and the amount of rotation can be detected. it can. The rotation amount of the shaft portion 24 depends on the rotation restricting portion 26 provided on the rotor 23 and the protrusion 1 provided on the mounting base 11.
It is regulated by the contact with the side surface of No. 5.

As shown in FIGS. 3 and 4, the rotor 2
3, a rotor upper surface protrusion 31 is provided on a surface parallel to the substrate 17, a rotor through hole 32 is provided on a surface of the cover 27 parallel to the substrate 17, and a spring is provided between the rotor upper surface protrusion 31 and the rotor through hole 32. The rotor 23 may be biased to a preset initial position by 33.

(Second Embodiment) A potentiometer according to a second embodiment of the present invention will be described below with reference to the drawings.

FIG. 5 is an exploded perspective view of the potentiometer according to the second embodiment of the present invention, and FIG. 6 is a sectional view of the same.

In the figure, reference numeral 41 is made of resin or the like having a protrusion 42 so as to protrude to the upper surface at substantially the center and side portions thereof, and two protrusions 43 protruding from the protrusion 42 toward the outer periphery. It is a mounting base. Reference numeral 44 denotes three terminals which are provided so as to be inserted from the lower surface of the mounting base 41 into the projecting portion 42. 45 is a through hole 4 through which the terminal 44 of the mounting base 41 is inserted.
6 is provided with two cantilever beams 47 that are provided so as to abut on the projecting portion 42 at the center and two projecting portions 43 at the outer circumference, and are made of resin such as phenol, glass epoxy or the like, or ceramic or the like. It is a Y-shaped substrate. On the surface of the substrate 45 facing the mounting base 41, the strain detecting element 4 including a strain gauge is provided on each of the two cantilever beams 47.
8 and a desired circuit pattern 49 electrically connected to the terminal 44 through the through hole 46. Reference numeral 50 denotes a cylinder made of resin or the like having a shaft portion 51 made of metal or resin in the center and having an inclined surface portion 52 so as to be fitted to the shaft portion 51 and contact the cantilever 47 of the substrate 45 on the upper surface at the outer periphery. It is a rotor. This rotor 5
At the tip of the inclined surface portion 52 of 0, a rotation regulating portion 53 that comes into contact with the side surface of the protrusion 43 of the mounting base 41 and regulates the rotation operation of the rotor 50 is provided. Reference numeral 54 denotes a cover made of resin, metal, or the like, which has an insertion hole 55 through which the shaft portion 51 of the rotor 50 is inserted, and which is provided so as to cover at least the rotor 50.

The assembling method of the potentiometer according to the second embodiment of the present invention constructed as above will be described below.

An adhesive or the like is applied to the protruding portion 42 of the mounting base 41 in which the terminals 44 are insert-molded in advance, and the mounting base 4 is mounted.
The board 45 is fixed so that the first terminal 44 and the through hole 46 of the board 45 are fitted to each other.

Then, the rotor 50 is provided so that the cantilever 47 of the substrate 45 and the slope portion 52 of the rotor 50 contact each other, and the cover 54 is caulked and fixed to the outer periphery of the mounting base 41 so as to cover the rotor 50. Is.

The operation of the potentiometer according to the second embodiment of the present invention configured as described above will be described below.

When the shaft portion 51 protruding from the center of the cover 54 is rotated, the rotor 50 provided integrally with the shaft portion 51.
Also rotates, and the slope portion 52 of the rotor 50 rotates. The cantilever 47 abutting on the slope 52 of the rotor 50 is displaced according to the amount of rotation of the shaft 51, and the resistance value of the strain detection element 48 provided on the cantilever 47 changes. The terminals 44, which are electrically connected to the circuit pattern 49 of the substrate 45 by the change in the resistance value of the strain detecting element 48, are respectively connected to the power source, GND, and the output terminal of the external system, and the rotation amount of the shaft portion 51. That is, the slope of the slope portion 52 of the rotor 50 changes the resistance value of the strain detecting element 48, and the output signal is output to the terminal 44.
Output more. In addition, when one is rotated, one cantilever beam 47 is used.
Of the cantilever 47 changes when the other of the cantilever beams 47 changes, so that the output signal changes with the rotation of the shaft portion 51, and the amount of rotation can be detected. it can. The rotation amount of the shaft portion 51 depends on the rotation restricting portion 53 provided on the rotor 50 and the protrusion 4 provided on the mounting base 41.
It is regulated by the contact with the side surface of No. 3.

As shown in FIGS. 7 and 8, the rotor 5
0 is provided with a rotor upper surface projection 61 on a surface parallel to the substrate 45, a rotor through hole 62 is provided on a surface of the cover 54 parallel to the substrate 45, and a spring is provided between the rotor upper surface projection 61 and the rotor through hole 62. The rotor 50 may be biased to the preset initial position by 63.

[0030]

As described above, according to the present invention, since the inclined surface of the rotor and the cantilever provided with the strain detecting element are in contact with each other, abrasion powder is not generated due to sliding even when used for a long time. No
It is possible to provide a potentiometer with improved reliability that has little influence on output characteristics.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a potentiometer according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is an exploded perspective view of a potentiometer according to another embodiment 1 of the present invention.

FIG. 4 is a sectional view of the same.

FIG. 5 is an exploded perspective view of a potentiometer according to a second embodiment of the present invention.

FIG. 6 is a sectional view of the same.

FIG. 7 is an exploded perspective view of a potentiometer according to another embodiment 2 of the present invention.

FIG. 8 is a sectional view of the same.

FIG. 9 is a sectional view of a conventional potentiometer.

[Explanation of symbols]

 11 Mounting Base 14 Bearing 17 Substrate 18 First Through Hole 20 Cantilever 21 Strain Detection Element 22 Circuit Pattern 23 Rotor 24 Shaft 25 Slope 27 Cover

Continued Front Page (72) Inventor Yoshihiro Arakawa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A cantilever having a mounting base having a bearing projecting from a substantially central upper surface, a through hole that fits with an outer circumference of the bearing of the mounting base, and a strain detecting element and a circuit pattern on a side portion. A substrate provided with, a rotor having a shaft portion that fits with the bearing of the mounting base and an inclined surface portion that abuts the cantilever on the outer periphery, and a cover that is provided to cover at least the rotor. Consisting of a potentiometer. 2. A mounting base having a projecting portion on an upper surface thereof, a substrate provided on the upper surface of the mounting base with a cantilever beam having a strain detecting element and a circuit pattern on a side portion thereof, and having a shaft in the center thereof. A potentiometer comprising: a rotor having an outer peripheral surface with a sloped portion that comes into contact with the cantilever; and a cover provided so as to cover at least the rotor. 3. The potentiometer according to claim 1, wherein a spring is provided between the rotor and the cover so as to bias the rotor.