JPH0727606Y2 - Interlocking variable resistor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an interlocking variable resistor in which the resistance value changes of two sets of variable resistors are interlocked by one rotating shaft,
Particularly, the present invention relates to an interlocking variable resistor suitable for use in a feeder control circuit.

[Conventional technology]

The fader control divides the output voltage of the left and right channels to the front and rear speakers, and normally uses a two-way variable resistor that connects two sets of variable resistors corresponding to the left and right channels. Has been done.

Here, each variable resistor includes a resistance substrate made of a heat-resistant material such as ceramics, a slider printed on the resistance substrate and a slider sliding on the current collector, and the slider. The slider receivers for holding the slider receivers are provided, and the slider receivers of each set are interlocked by a common rotary shaft.
Therefore, when both sliders are rotated by the rotating shaft and the relative position of each resistor and slider is changed, the output voltage to the front and rear speakers of each channel is attenuated according to this resistance value. The output balance of the front and rear speakers can be adjusted.

[Problems to be solved by the device]

By the way, as described above, when the output voltage of the front and rear speakers is attenuated by the variable resistor, the resistor generates heat corresponding to the power consumption. Needs to be as large as possible. However, in the above-mentioned conventional example, since the resistor and the current collector are concentrically formed on the same substrate, the outer diameter of the resistor substrate inevitably becomes large when trying to secure a predetermined withstand voltage. This is a major factor that hinders miniaturization.

The present invention has been made in view of such circumstances, and an object thereof is to provide a small interlocking variable resistor.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a pair of resistance substrates having horseshoe-shaped resistors formed thereon, a pair of slider receivers to which sliders are attached and which can rotate integrally with each other, and a pair of these sliders. An interlocking variable type in which a slider holder is included and a case for holding both the resistance substrates is provided, and by rotating both slider holders, each slider rotates and slides on the resistor. In the resistor, the first slider is provided on one surface of the first slider receiver, and the first annular lead plate continuous with the first slider is provided on the other surface of the resistor. The second slider is provided on one surface of the second slider receiver, and the second annular lead plate that is continuous with the second slider is provided on the other surface of the second slider receiver, and the second slider is provided inside the case. Providing a pair of lead terminals projecting in opposite directions, the pair of lead ends on the first and second annular lead plates. The contact each bullet, the first and second
The slider is elastically contacted with the pair of resistance substrates.

[Action]

In the above means, the first slider is provided on one surface of the first slider receiver, and the first annular lead plate continuous with the first slider is provided on the other surface. The second slider is provided on one surface of the second slider receiver, and the second annular lead plate continuous with the second slider is provided on the other surface of the second slider receiver. A pair of lead terminals projecting in mutually opposite directions are provided inside, the pair of lead terminals are elastically contacted with the first and second annular lead plates, respectively, and the first and second sliders are connected to the pair of resistances. Since the resistor is elastically contacted with the substrate, the area of the resistor occupying the resistor substrate can be significantly increased. In other words, the outer dimensions of the resistor substrate can be significantly reduced with the same withstand voltage. Also, since the lead terminals of the two sets of variable resistors project in mutually opposite directions and are in elastic contact with the lead plates, the axial dimension of both slider receivers does not increase, and the size of the small size is reduced. An interlocking variable resistor can be provided.

〔Example〕

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

FIG. 1 is a sectional view of an interlocking variable resistor according to an embodiment of the present invention, FIG. 2 is a front view of a resistance substrate provided in the variable resistor, and FIG. 3 is a line AA of FIG. Sectional view, along the 4th
The figure shows the front view of the case provided in the variable resistor.
FIG. 6 is a sectional view taken along the line BB of FIG. 4, FIG. 6 is a front view of a slider receiver provided in the variable resistor, and FIG. 7 is a sectional view taken along the line CC of FIG. FIG. 8 is a rear view of the slider receiver.

In FIG. 1, reference numerals 1 and 1 denote resistance substrates made of ceramic material, which are arranged in parallel to both open ends of a case 2 made of synthetic resin. As shown in FIGS. 2 and 3,
A horseshoe-shaped resistor 3 is formed on each of the opposing surfaces of the resistance substrates 1 and 1 by printing, and the resistor 3 includes a central conductive layer 4 made of silver paste or the like and a resistance layer continuous at both ends thereof.
5 and 5, and metal terminals 6, 6 are soldered 7, 7 to the conductive portions on both ends of the resistor 3, respectively. After these metal terminals 6 and 6 are outserted to the connector 8 made of synthetic resin, they are soldered 7 and 7 to both ends of the resistor 3 as described above. It is integrated with the body 8. A pair of engaging protrusions 9 and 9 and a pair of through holes 10 are formed in the connecting body 8.

As shown in FIGS. 4 and 5, a partition wall 11 is integrally formed in the center of the inside of the case 2, and the partition wall 11 defines a pair of cylindrical space portions 12, 12. . A pair of lead terminals 13 and 13 are outserted to the case 2, and one ends of the lead terminals 13 and 13 are exposed in the partition wall 11 and bent in mutually opposite directions, that is, toward both space portions 12 and 12. Has been. In addition, on both sides of Case 2,
A pair of engaging holes 1 into which the engaging projections 9 of the connecting body 8 are fitted.
4, 14 and a pair of through holes 15, 15 and an engagement protrusion 16 are formed.

Returning to FIG. 1, in the space 12, 12 between the resistance substrate 1, 1 and the partition wall 11 of the case 2, there are arranged slider receivers 17, 17 made of synthetic resin, respectively. The notches 18, 18 formed on one end surfaces of the other engage with each other to rotate integrally. As shown in FIGS. 6 to 8, the slider receiver 17 has a collar portion 19 and a cylindrical portion 20, and the notch 18 is formed in one end surface of the cylindrical portion 20. Further, a thin metal plate having elasticity is outserted to the slider receiver 17, and the thin metal plate is bent in a U shape to form a slider 21 and a lead plate 22 on both sides. The armature 21 is exposed on one surface of the collar portion 19, and the lead plate 22 is exposed on the opposite surface of the collar portion 19. A pair of sliding contacts 21a, 21b are formed on the slider 21 by bending, and these sliding contacts 21a, 21b are adapted to rotate and slide on the resistor 3 of the resistance substrate 1. (See Figure 2). On the other hand, the lead plate 22 is formed in an annular shape.
The lead terminal 13 is elastically contacted with the.

Returning to FIG. 1 again, metal heat sinks 23, 23 are arranged on both sides of the resistance boards 1, 1, and further the heat sink 23 on the right side of the drawing is disposed.
A bearing body 24 is coaxially arranged so as to face the. A rotary shaft 25 is rotatably supported by the bearing body 24, and the tip (left side in the drawing) of the rotary shaft 25 is a cylindrical portion 20 of the slider receiver 17.
Is locked. A stopper plate 26 is locked at the tip of the rotary shaft 25, and the stopper plate 26 has a rotation angle regulated by a protrusion formed on the one heat dissipation plate 23. .

The interlocking variable resistor according to the present embodiment is constructed as described above, and the case 2 and the resistance boards 1, 1 are fitted with the engaging projections 9 of the connecting bodies 8, 8 in the engaging holes 14 of the case 2. They are integrated by combining them, and further, both resistance boards 1, 1, case 2, both heat dissipation plates 23,
The 23 and the bearing body 24 are coaxially integrated by press-fitting connecting pins (not shown) into the through holes 10 and 15, etc. Here, since the metal terminal 6 is outserted to the connecting body 8 and the lead terminal 13 is outserted to the case 2, the inside of the flux transmitted through these terminals 6 and 13 is prevented, and the interlocking type variable The resistor can be soldered to a printed circuit board (not shown) by the auto dip method.

After soldering the terminals 6 and 13 to the printed circuit board in this way, when the rotary shaft 25 is pinched with fingers or the like and rotated, both the slider receivers 17 and 17 are interlocked with the rotary shaft 25 and the resistance substrate 1 , 1 and the case 2 are rotationally displaced. In this case, each slider
Both sliding contacts 21a, 21b of the slider 21 provided on one side of 17
Rotatively slides on the conductive layer 4 and the resistance layer 5 of the resistor 3 formed on the opposing resistance substrate 1, and the lead plates 22 provided on the other surface side of the respective slider receivers 17 face each other. Since the lead terminal 13 rotates while being in constant contact with the lead terminal 13, the resistance value between each metal terminal 6 and the lead terminal 13 can be changed. In addition, the rotation angle of the rotary shaft 25 is such that the stop plate 26
By hitting the protrusions of 23, it is regulated within a predetermined range, and the heat generated from the resistance layer 5 is radiated to the outside through both heat radiating plates 23, 23. There is.

In the above-described embodiment, the connecting body 8 and the resistance substrate 1 are integrated by soldering the metal terminals 6 outserted to the connecting body 8 in advance to the resistor 3 of the resistance substrate 1. Because of this, the invasion of the flux transmitted through the metal terminal 6 is eliminated, and soldering by the auto-dip method, which has been conventionally difficult, can be performed.

In addition, a slider 21 is provided on one surface of the slider receiver 17 for sliding contact with the resistor 3 of the resistance substrate 1, and a lead plate 22 corresponding to a conventional current collector is provided on the other surface of the slider receiver 17. Provide this lead plate
Since the lead terminal 13 that is in sliding contact with the case 22 is outserted to the case 2, the area of the resistor 3 occupying the resistance substrate 1 can be significantly increased. In other words, under the same withstand voltage, compared to the conventional example. The external dimensions of the resistance substrate 1 can be reduced. Further, since the lead terminals 13 project in opposite directions corresponding to the two sets of variable resistors, it is possible to prevent the slider receiver 17 and the rotary shaft 25 from increasing in size in the axial direction.
In combination with the above points, a small interlocking variable resistor can be provided.

[Effect of device]

As described above, according to the present invention, the first slider is provided on one surface of the first slider receiver, and the first slider that is continuous with the first slider is provided on the other surface. An annular lead plate is provided, a second slider is provided on one surface of the second slider receiver, and a second annular lead plate continuous with the second slider is provided on the other surface. A pair of lead terminals projecting in mutually opposite directions are provided inside the case, and the pair of lead terminals are elastically contacted with the first and second annular lead plates respectively, and the first and second sliders are provided. Elastically contacting the pair of resistance substrates, it is possible to suppress an increase in the axial dimension of the slider receiver and to reduce the outer dimensions of the resistance substrate, thereby providing a small interlocking variable resistor.

[Brief description of drawings]

1 is a sectional view of an interlocking variable resistor, FIG. 2 is a front view of a resistance substrate, and FIG. 3 is a sectional view taken along the line AA of FIG. 4, FIG. 4 is a front view of the case, FIG. 5 is a cross-sectional view taken along the line BB of FIG. 4, FIG. 6 is a front view of the slider receiver, and FIG. 7 is CC of FIG. FIG. 8 is a sectional view taken along the line, and FIG. 8 is a rear view of the slider receiver. 1 ... Resistor board, 2 ... Case, 3 ... Resistor, 4 ...
Conductive layer, 5 ... Resistive layer, 6 ... Metal terminal, 7 ... Soldering, 8 ... Coupling body, 9,16 ... Engaging protrusion, 10,15 ... Through hole, 11 ... Partition wall, 12 ...... Space part, 13 ...... Lead terminal, 14
...... Engagement hole, 17 ...... Slider receiver, 18 ...... Notch, 19 ...... Collar part, 20 ...... Cylindrical part, 21 ...... Slider, 21a, 21b ...... Sliding contact, 22 ... … Lead plate, 23 …… Heat sink, 24 …… Bearing body, 25
…… Rotary axis, 26 …… Stopper plate.

Claims (1)

[Scope of utility model registration request] 1. A pair of resistance substrates on which horseshoe-shaped resistors are formed, a pair of slider receivers to which sliders are attached and which can rotate integrally with each other, and which include these slider receivers. A case for holding the both resistance substrates, wherein the sliders are rotatably operated so that the respective sliders rotate and slide on the resistors. A first slider is provided on one surface of the slider receiver, and a first annular lead plate that is continuous with the first slider is provided on the other surface of the second slider receiver. A second slider is provided on one surface, and a second annular lead plate that is continuous with the second slider is provided on the other surface, and a pair of pair of protrusions projecting in opposite directions are provided inside the case. A lead terminal is provided, and the pair of lead terminals are elastically contacted with the first and second annular lead plates, respectively, Interlocking type variable resistor, characterized in that the serial first and second wiper elastic contact with the pair of resistance substrate.