JPH1092611A - Element substrate for three-gang rotating and sliding electronic parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the lives of three sets of electronic parts, each of which is composed of an electronic parts element and a slider, equal to each other. SOLUTION: Three electronic parts elements, each of which is composed of an elemental body (resistor) and a current collecting body, are positioned in three divided areas around the center of a hole 12 (the center of rotation of a rotating body) on an insulating substrate 11 and the resistors R1 -R3 are positioned to first radial positions and the current collecting bodies C1 -C3 are positions to second radial positions. The sliding distances of three sliders attached.to the rotating bodies which respectively slide on the electronic parts element in contacting states become equal to each other and, therefore, the abrasion losses of the sliders caused by the sliding become nearly equal to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slider, such as a triple rotary variable resistor, which slides on an element substrate on which three electronic component elements are formed. The present invention relates to a structure of the element substrate in a triple-type rotary sliding electronic component configured by engaging a rotating body having the following.

[0002]

2. Description of the Related Art FIG. 6 shows the structure of an element substrate used in a triple variable resistor as a conventional example of this type of element substrate. Three electronic component elements for a variable resistor are formed on an insulating substrate 11. Each electronic component element is composed of a resistor and a current collector. In the drawing, the resistors are represented by R _{1 to} R ₃ ,
The current collector shown by the C ₁ ~C _3. In this example, a hole 12 through which the rotating shaft is inserted is formed at the center of the insulating substrate 11,
Around the center of the hole 12, circular resistive element R ₁ and R ₂ are formed in substantially symmetrical positions on the same circumference, a circular arc-shaped collector respectively their outer C ₁ and C ₂ are formed Is done. Further, an arc-shaped resistor R ₃ and a current collector C ₃ are sequentially formed outside the current collector C ₁ .

That is, in this example, the resistors R ₁ and R ₂ are located at a first radial position from the center of rotation, the current collectors C ₁ and C ₂ are located at a _second radial position, and the resistor R ₃ is located at a third radial position. , the current collector C ₃ is disposed a fourth radial position. Resistors R _{1 to} R ₃
The extension conductors 13 are connected to both ends of the insulating substrate 1 as shown in the drawing.
1 and is connected to the terminal electrodes 14 arranged and formed on one side thereof. Similarly, the current collectors C _1-
One end of C ₃ is connected to the terminal electrode 14 via the extension conductor 13. Therefore, nine terminal electrodes 14 are arranged on one side of the insulating substrate 11.

[0006] A triple variable resistor is constructed by combining a rotating body having three sliders attached to the element substrate 15 having the above-described configuration, and each slider corresponds to each of the three variable resistors. A resistor and a current collector, ie R ₁ and C ₁ , R ₂ and C ₂ ,
The sliding contact between R ₃ and C ₃ makes the resistance variable.

[0005]

By the way, in the above-mentioned conventional element substrate 15, two of the three electronic component elements composed of the resistor and the current collector are located at the same radial position. The other one is located outside, that is, at a position with a large radius, so that there is a disadvantage that the insulating substrate 11 becomes large accordingly.

Further, the sliding distance of the slider corresponding to the outer electronic component element is longer than the sliding distance of the other two sliders. The sliding wear amount of the outer slider becomes larger than the dynamic wear amount, that is, there is a difference in the life of the three sets of electronic components including the electronic component elements and the slider, and the outer electronic components have a different life. There is a disadvantage that the sliding life is short.

An object of the present invention is to solve these conventional disadvantages, and the sliding wear of the three opposing sliders is substantially uniform, that is, the sliding life of the three sets of electronic components is substantially uniform.
Another object of the present invention is to provide an element substrate for a triple-type rotary sliding electronic component that can be configured in a small size.

[0008]

According to the first aspect of the present invention, a rotating body having a slider slidingly contacting each of these electronic component elements is engaged with an element substrate having three electronic component elements. The element substrate of the triple-type rotary sliding electronic component is configured such that each electronic component element is disposed on an insulating substrate in an area divided into three around the rotation center of the rotating body, and each electronic component element is an element. Each element body is located at a first radial position from the center of rotation, each current collector is located at a second radial position from the center of rotation, and each element body and the current collector , And terminal electrodes respectively provided and arranged on one side of the insulating substrate.

According to a second aspect of the present invention, in the first aspect, each element is a resistor. According to a third aspect of the present invention, in the first aspect, at least one of the three element bodies is a switch body having a conductor region and an insulator region, and the rest is a resistor. According to a fourth aspect of the present invention, in any one of the first to third aspects, the three divisions are 1
The intervals are 20 °.

[0010]

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an embodiment of the present invention. This example shows an element substrate used for a triple variable resistor, and each element of each electronic component element constituted by an element and a current collector is a resistor. Parts corresponding to those in FIG. 6 are denoted by the same reference numerals.

The hole 12 through which the rotating shaft of the insulating substrate 11 is inserted
Is divided into three around the center of the hole 12 (the center of rotation of the rotator), and each region has an electronic component element, that is, a resistor R ₁ and a current collector C ₁ , R ₂ and C ₂ , R ₂ . ₃ and C ₃ are arranged. In this example, each divided region has a central angle of 120 ° and is equally spaced. Each of the resistors R _{1 to} R ₃ is formed in an arc shape, located at a first radial position from the center of rotation, and arc-shaped current collectors C _{1 to} C ₃ are arranged at a second radial position outside thereof. You. The lengths and widths of the resistors R _{1 to} R ₃ are equal to each other, and the lengths and widths of the current collectors C _{1 to} C ₃ are also equal to each other. Note that the current collectors C _{1 to} C ₃ may be arranged inside, and the resistors R _{1 to} R ₃ may be arranged outside.

As shown in the drawing, an extension conductor 13 is connected to each of the resistors R _{1 to} R ₃ and the current collectors C _{1 to} C ₃ , and these extension conductors 13 are led out to one side of the insulating substrate 11. , Are respectively connected to the terminal electrodes 14. The element substrate 21 having the above configuration is formed, for example, as follows.

By printing and applying a silver paste on an insulating substrate 11 made of a synthetic resin material or ceramic,
The current collectors C _{1 to} C ₃ , the extension conductor 13 and the terminal electrode 14 are formed and fired. Next, a resistor paste made of a synthetic resin material containing, for example, carbon powder is printed and applied to form resistors R _{1 to} R ₃ and fired. At this time, the current collector C ₁
A resistor paste is simultaneously applied to C ₃ , the extension conductor 13 and the peripheral edge of the terminal electrode 14, and they are covered with a resistor. As a result, the friction coefficients of the current collectors C _{1 to} C ₃ can be reduced, and oxidation, sulfidation, migration, and the like of the current collectors C _{1 to} C ₃ and the extension conductor 13 can be prevented.

FIG. 2 shows that the element substrate 21 formed as described above is accommodated and fixed in the case 22, and the terminal electrodes 1
4 shows a state where terminals 23 are attached to four parts. On the other hand, FIG. 3 shows a rotating body 24 combined with the element substrate 21 attached to the case 22. The disk-shaped substrate 25 of the rotating body 24 has a mounting hole 26 at the center thereof, and three sliders 27 are mounted on one plate surface at equal angular intervals on the same circumference. . In this example, the slider 27 is a so-called wire brush in which a plurality of wires made of a noble metal such as a gold alloy are attached to a bus bar. Installed crimped.

The rotating body 24 is provided on the other plate surface of the base 25.
A tripod-shaped drive spring 29 for attaching and fixing the drive shaft to the rotating shaft is attached. In FIG. 3, reference numeral 31 denotes a U-shaped peripheral wall portion for positioning and fixing the tip of each leg of the drive spring 29 to the base 25, and the tip of each leg is press-fitted into the U-shaped peripheral wall 31. You. Reference numeral 32 denotes a mounting hole into which the rotating shaft is press-fitted and fixed.

FIG. 4 shows that the rotating body 2 is mounted on the projecting outer peripheral portion of the bearing 33 which is inserted into the case 22 with one end protruding therefrom.
4 is engaged, and the rotating body 24 is
2 shows a state in which a triple variable resistor is rotatably held and configured as a triple variable resistor. Each slider 27 is located so as to be in sliding contact with the corresponding resistor and current collector. The variable resistor shown in FIG. 4 is used, for example, in a case in which a case 22 is attached to a chassis, a rotating body 24 is attached to a rotating shaft protruding from the chassis, and the rotation angle of the rotating shaft is detected. . In FIG. 4, 34 is a terminal 23.
Shows the soldered lead wires.

FIG. 5 shows an example in which one of the three electronic component elements arranged on the insulating substrate 11 is an element for a switch and the other two are elements for a variable resistor. to the element substrate 21 shown in FIG. 1, the resistor R ₃
Is replaced with a switch body S. The switch body S includes a conductor region and an insulator region. In this example, the conductor region S ₁ , the insulator region I, and the conductor region S ₂ are sequentially arranged, and the slider moves on them. Thus, a single-pole double-throw switch is configured. The length and width of the switch body S are the same as those of the resistor R ₁ ,
It is equal to the length and width of R _2.

The device substrate 35 shown in FIG.
The switch body S is formed as follows. Conductor area S
₁, S_TwoIs formed by printing and applying silver paste, and after firing,
Further, a resistance paste is applied and fired. The insulator region I
Highly wear-resistant synthesis of phenolic resin, epoxy resin, etc.
It is formed by printing and applying a resin. Note that the friction coefficient
Therefore, the synthetic resin forming the insulator region I contains carbon powder.
And a fluorine resin. Also, switch
The conductor region S₁, S _TwoAnd insulation
It is preferable to provide a very small gap between each body region I.
Good.

[0019]

As described above, according to the present invention, the three electronic component elements are arranged in each of three divided regions around the rotation center of the rotating body and are positioned on the same circumference.
The sliding distances of the three sliders mounted on the counterpart rotating body corresponding to the respective electronic component elements are the same, so that the sliding wear amounts of the respective sliders are substantially uniform.

Therefore, by using the element substrate according to the present invention, it is possible to obtain a triple-type rotary sliding electronic component in which the sliding life of three sets of electronic components including the electronic component elements and the slider is substantially uniform. . In addition, since the three electronic component elements are arranged on the same circumference in this manner, the electronic component element can be made smaller than the conventional element substrate shown in FIG.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a plan view showing a state in which the element substrate of FIG. 1 is attached to a case.

3A and 3B are views showing a rotating body combined with the element substrate of FIG. 1, A is a plan view, B is a cross-sectional view partially omitted, and C is a bottom view.

FIG. 4 is a diagram showing a triple variable resistor using the element substrate of FIG. 1, A is a cross-sectional view partially omitted, and B is a plan view.

FIG. 5 is a plan view showing an embodiment of the invention of claim 3;

FIG. 6 is a plan view showing a conventional element substrate.

Claims (4)

[Claims] 1. The above-described element of a triple rotary sliding electronic component in which a rotating body having a slider that slides on each of these electronic component elements is engaged with an element substrate having three electronic component elements. A substrate, wherein each of the electronic component elements is disposed on an insulating substrate in an area divided into three around a rotation center of the rotating body, and each of the electronic component elements includes an element body and a current collector, Each of the element bodies is located at a first radial position from the rotation center, each of the current collectors is located at a second radial position from the rotation center, and each of the element bodies is respectively derived from the element body and the current collector. An element substrate, wherein the provided terminal electrodes are arranged on one side of the insulating substrate. 2. The element substrate according to claim 1, wherein each of said element bodies is a resistor. 3. The element substrate according to claim 1, wherein at least one of the three element bodies is a switch body having a conductor region and an insulator region, and the other is a resistor. Characteristic element substrate. 4. The element substrate according to claim 1, wherein said three divisions are equally spaced at 120 °.