JP2001351806A - Electronic parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide electronic parts which can smoothly move a slidable object without resistance even when the board thickness of a case is thick. SOLUTION: The electronic parts are provided with a substrate 20 on which slide contact patterns 23 and 25 are formed, the slidable object 30 placed on the substrate 20, a slider 40 attached to the object 30, and a case 60 which is put on the substrate 30 and fixed by bending pawls 67 installed to the lower sides of the case 60 to the back side of a mount 10 provided on the bottom side of the substrate 20. Relieving sections 71 which prevent the bent corner sections 69 of the pawls 67 from pushing up the mount 10 by coming into contact with the mount 10 are installed to the bent corner sections 69. The relieving sections 71 are formed by reducing the thicknesses of the bent corner sections 69 of the pawls 67.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component such as a sliding variable resistor.

[0002]

2. Description of the Related Art Conventionally, for example, a sliding electronic component has been used as a linear sensor. Here, FIG. 5 is a perspective view showing a slide type variable resistor used for a linear sensor for a CD (compact disk) changer, and FIG. 6 is a sectional view thereof. As shown in both figures, in this sliding variable resistor, a sliding object 89 is placed on a substrate 85 placed on a mounting plate 81, and a case 93 made of a metal plate is put thereon. It is configured by bending a claw 95 protruding from the lower side toward the back side of the mounting plate 81. When the lever 91 of the slide-type object 89 is slid in the direction of arrow E, the slider 97 attached to the lower surface of the slide-type object 89 slides on the sliding contact patterns 86 and 87 formed on the substrate 85. , Changing its output.

In a CD changer, a take-out / storage member for a large number of CDs arranged in parallel is provided with a desired CD.
It is necessary to accurately move to a position opposing to the above, but to detect the moving position, the long slide type variable resistor as described above is used.

In the case of a slide variable resistor formed long as described above, the thickness of the case 93 is made larger (for example, 0.5 mm thick) than that of a short case in order to maintain its strength. There is a need.

However, the nail 9 of the case 93 having a large thickness
5 is bent to the back side of the mounting plate 81, the bent corner portion a on the inner side surface of the claw 95 is bent with a large radius of curvature as shown in FIG. Abuts against the lower side 81a and pushes it up. Therefore, when the sliding-type object 89 is slid, the sliding-type object 8
Each time the 9 approaches the portion where the claw 95 is provided, the sliding resistance increases, and there is a problem that the sliding type object 89 cannot be moved smoothly with a uniform force over the entire sliding range.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to smoothly move a sliding type object without resistance even if the thickness of a case is large. It is to provide an electronic component that can be used.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a substrate having a sliding contact pattern formed thereon, a sliding member mounted on the substrate, and a sliding member mounted on the sliding member. A slider that comes into contact with the sliding contact pattern, and an intervening member in which a slidable object is placed on the substrate and a claw provided on the lower side of the slidable member is provided on the substrate or the lower side of the substrate. An electronic component comprising: a case fixed by bending to the back surface side of the member; wherein the claw is bent at a bent corner portion, or the substrate or the substrate facing the bent corner portion is disposed below the substrate. An interposed member is provided with a relief portion for preventing a bent corner portion from contacting the substrate or the interposed member and pushing up the substrate or the interposed member. Further, the relief portion is formed by reducing the thickness of a bent corner portion of the nail. Further, the relief portion is formed by cutting out an edge of a portion of the substrate or the intervening member that faces the bent corner of the claw.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an exploded perspective view of a slide type variable resistor to which one embodiment of the present invention is applied. As shown in the figure, this slide type variable resistor has a mounting plate (intervening member) 10 on which a substrate 20 and a sliding type object 30 to which a slider 40 is mounted are placed, and a case is placed thereon. 6
0, and the above components are integrated by bending the claws 67 provided on the lower sides on both sides of the case 60 toward the back side of the mounting plate 10. Hereinafter, each component will be described.

The mounting plate 10 is made of a metal plate, and is provided with five notched insertion portions 11 on both sides of the mounting plate 10 for inserting the following claws 67 of the case 60.

The substrate 20 is provided on the surface of a hard insulating substrate 21.
A drawing pattern in which a resistance pattern (sliding contact pattern) 23 and a conductive pattern (sliding contact pattern) 25 extending in the longitudinal direction are provided, and one end of the resistance pattern 23 is drawn between the two patterns 23 and 25 to the opposite end. 27 are provided. At the end of each of the patterns 23, 25, 27, mounting holes 23a, 25a, 27a are provided. At positions on both sides of the substrate 20 opposite to the insertion portions 11 of the mounting plate 10, cutout insertion portions 29 for inserting the following claw portions 67 of the case 60 are provided. A cylindrical mounting portion 32 of a metal plate terminal 28 is inserted into each of the mounting holes 23a, 25a, 27a from the back surface side, and is caulked and fixed on the front surface side.

The sliding die 30 is a synthetic resin molded product, and is formed by projecting a lever 33 from the upper surface of a substantially plate-like base 31.

The slider 40 is made of an elastic metal plate.
One to two sliding booklets 43, 43 are protruded, and sliding contact portions 45, 45 are provided at their ends, respectively. These sliding portions 45 are provided at positions where they come into contact with the resistance pattern 23 and the conductive pattern 25. The slider 40 has its base 41 in contact with the lower surface of the base 31 of the sliding die 30, and a hole 42 formed in the base 41 at that time.
Is fixed by inserting a projection (not shown) provided on the lower surface of the base 31 and heat-caulking the tip.

FIG. 2 is a view showing a case 60.
1A is a side view, and FIG. 1B is an enlarged cross-sectional view taken along the line AA in FIG. As shown in FIG.
Reference numeral 0 denotes a metal plate, and both side walls 6 of the upper surface portion 61 having substantially the same shape as the substrate 20 are bent downward.
3, 63 are formed. The upper surface portion 61 is provided with a lever insertion port 65 extending in the longitudinal direction and projecting the lever 33 of the sliding die 30. Also, both side walls 6
Five claws 67 protrude from the lower end sides of 3, 63, respectively.

In this embodiment, as shown in FIG. 2, an escape portion 71 for reducing the thickness of the claw 67 is provided at a bent corner 69 when the inner side surface of each claw 67 is bent. Provided. The escape portion 71 is formed by pressing this portion in the thickness direction and crushing it to form a concave portion. Of course, it may be formed by other methods such as shaving.

In order to assemble this slide type variable resistor, as shown in FIG.
Is mounted thereon, and a sliding object 30 having a slider 40 mounted thereon is mounted thereon, and a case 60 is mounted thereon.
At this time, the lever 33 of the sliding die 30 is made to protrude from the lever insertion opening 65, and the claw 67 is inserted into the insertion portions 29 and 11 of the base plate 20 and the mounting plate 10. Then, the slide type variable resistor is completed.

The appearance of the completed slide type variable resistor is the same as that shown in FIG. Here, FIG. 3 is a schematic cross-sectional enlarged view of the slide type variable resistor (a cross-sectional enlarged view taken along the line AA in FIG. 1). As shown in the drawing, a relief portion 71 is provided at the bent corner portion 69 of the claw 67, so that both lower end sides 10a of the mounting plate 10 are located at the relief portion 71. Even if the radius of curvature of the portion 69 is large, there is no possibility that the inner side surface of the bent corner portion 69 pushes up the lower end sides 10a on both sides of the mounting plate 10. Therefore, when the sliding type object 30 is slid, the sliding type object 3
The sliding resistance does not increase each time the 0 approaches the portion where the pawl 67 is provided, and the sliding type object 30 can be smoothly moved with a uniform force at any moving position.

FIG. 4 is an enlarged schematic cross-sectional view (the same portion as FIG. 3) of a slide type variable resistor constituted by using another embodiment of the present invention. This embodiment is different from the above-described embodiment in that, instead of providing the escape portion 71 in the claw 67, the lower end sides 10a of the mounting plate 10 are tapered in portions opposed to the bent corner portions 69 of the claw 67. The point is that a notched escape portion 13 is provided. Even with this configuration,
The inner surface of the bent corner 69 having a large radius of curvature is the mounting plate 1.
There is no danger of pushing up the lower edges 10a on both sides of the zero. Therefore, when the sliding type object 30 is slid, the sliding type object 30
The sliding resistance does not increase each time the part approaches the portion provided with 7, and the sliding type object 30 can be smoothly moved with a uniform force at any moving position.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims and the technical idea described in the specification and the drawings. Is possible. It should be noted that any shape or material not directly described in the specification and the drawings is within the scope of the technical idea of the present invention as long as the effects and effects of the present invention are exhibited.

For example, in the above-described embodiment, an example is shown in which a slide type variable resistor is used for a linear sensor, but it may be used for other operation types such as a rotary type variable resistor. Further, in the above embodiment, the resistance pattern and the conductive pattern are used as the sliding contact patterns formed on the substrate. However, other various sliding contact patterns such as a switch pattern may be used. In the above embodiment, a hard substrate is used as the substrate, but a flexible substrate may be used. In the above embodiment, the mounting plate is provided below the substrate, but the mounting plate may be omitted and the claws of the case may be bent directly to the back surface of the substrate. In this case, when the embodiment shown in FIG. 4 is applied, a relief portion formed of a notch is provided at both lower end sides of the substrate 20. Further, not only one mounting plate but also a plurality of mounting plates may be installed. In short, any electronic component having a structure in which the nail of the case is fixed by bending the nail on the back surface of the substrate or the interposition member provided below the substrate may be used. Also, the shape of the escape portion provided on the claw and the escape portion provided on the substrate or the interposed member can be variously modified. In short, it is possible to prevent the bent corner portion of the claw from contacting the substrate or the interposed member and pushing up the same. Any shape and structure may be used as long as the escape portion is provided.

[0020]

As described above in detail, according to the present invention, even if the thickness of the case is large, the sliding type object can be smoothly moved without resistance.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a slide-type variable resistor to which an embodiment of the present invention is applied.

2A and 2B are diagrams showing a case 60, wherein FIG. 2A is a side view, and FIG. 2B is an enlarged cross-sectional view taken along a line AA in FIG.

FIG. 3 is an enlarged schematic cross-sectional view of a sliding variable resistor (FIG. 1);
FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged schematic cross-sectional view (the same portion as FIG. 3) of a slide type variable resistor configured by using another embodiment of the present invention.

FIG. 5 is a perspective view showing a slide type variable resistor used for a linear sensor for a CD changer.

6 is an enlarged schematic cross-sectional view of the slide variable resistor shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 mounting plate (intervening member) 20 substrate 23 resistance pattern (sliding contact pattern) 25 conductive pattern (sliding contact pattern) 28 terminal 30 sliding type object 40 slider 60 case 67 claw 69 bending corner portion 71 relief portion 13 relief portion

Claims (3)

[Claims] 1. A substrate on which a sliding contact pattern is formed, a sliding object mounted on the substrate, a slider attached to the sliding object and in contact with the sliding contact pattern, And a case which is fixed by bending a nail provided on the lower side of the sliding type object on the back surface of the substrate or an interposition member provided under the substrate in a state where the sliding type object is placed thereon. In the electronic component, the bent corner portion abuts the substrate or the interposed member on the bent corner portion where the claw is bent, or on the substrate facing the bent corner portion or on the intervening member installed below the substrate. An electronic component having a relief portion for preventing pushing up. 2. The electronic component according to claim 1, wherein the escape portion is formed by reducing a thickness of a bent corner portion of the nail. 3. The electronic component according to claim 1, wherein the escape portion is formed by cutting out an edge of a portion of the substrate or the intervening member that faces the bent corner of the claw.