JPS6133606Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a slide type variable resistor in which a resistance value is set by sliding a movable body relative to a resistance substrate.

A variable resistor in which a resistor is formed in the longitudinal direction of a resistor board, a movable body is slidably held on the resistor board, and the resistance value is set by sliding the movable body on the resistor. The width of the device in the sliding direction can be set to be relatively narrow, and the device can be made smaller. This type of variable resistor is convenient for installation in a limited installation space, and is used in various fields.

This type of variable resistor that has been used conventionally has a configuration as shown in FIG. Retained. That is, the resistor 13 is formed in a band shape on the resistor substrate 11 along one side edge of the resistor substrate 11 . Band-shaped conductors 14-1 and 14-2 are attached to each end of this resistor 13.
are electrically connected, and these conductors 14-1, 14
-2, the first and second electrode terminals 15-1 and 15-2 are perpendicular to one side edge of the resistor board 11.
is taken out of the resistor board 11.

On the other hand, a strip-shaped current collector 16 is formed parallel to the resistor 13 along the other side edge of the resistor board 11, one end of this current collector 16 is bent toward the resistor 13, and the resistor board A common electrode terminal 15-3 taken out perpendicularly to one side edge of 11 is electrically connected.

The movable body 12, which is slidably held with respect to the resistance board 11, has a structure in which a substantially rectangular slider 20 made of a conductive material is fixedly attached to a plate-shaped base 18 made of an insulating material. have This slider 20 has both side edges cut and raised, and two-pronged elastic contact pieces 20-1 and 20-2 are formed there. The slider 20 is fixedly attached to the base 18 of the movable body 12, and the side edges of the base 18 along the contact pieces 20-1, 20-2 of the slider 20 disposed on the base 18 are A side piece 21- is integrally extended at right angles to the base body 18.
1, 21-2 are formed. The ends of the side pieces 21-1 and 21-2 on both sides of the side edge of the base body 18 in the extending direction are connected to each other to form the base body 1.
Engagement rings 22-1 and 22-2 are formed on a plane perpendicular to 8.

One side edge of the base body 18 is extended to both sides along the side edge to form holding pieces 23-1, 23-2, and the ends of the respective holding pieces 23-1, 23-2 are connected to the base body 1.
The convex portions 23-1P, 23 are bent toward the center of 8.
-2P is formed. The holding pieces 23-1 and 23-2 thus formed are formed to have elasticity in a direction perpendicular to the side edge of the base body 18. A knob 25 is formed at approximately the center of the side edge of the movable body 12 on which the holding pieces 23-1 and 23-2 are formed, protruding at right angles to the side edge.

The movable body is moved relative to the resistance substrate 11 so that the surface of the resistance substrate 11 on which the resistor 13 and the current collector 16 are formed and the surface of the movable body 12 on which the slider 20 is attached are opposed to each other. 12 to its engagement ring 2
2-1 and 22-2 are fitted and held. In a state where the movable body 12 is fitted and held with respect to the resistance board 11, the contact piece 20-1 of the movable body 12 is in elastic contact with the current collector 16, and the contact piece 20-2 is in elastic contact with the resistor 13. are in contact with. Therefore, a resistance value corresponding to the sliding position of the movable body 12 on the resistor 13 is obtained between the first or second electrode terminal 15-1, 15-2 and the common electrode terminal 15-3.

When the movable body 12 is attached to the resistance board 11, a recess 26 is formed in the side surface of the resistance board 11 on the side where the knob 25 of the movable body 12 is located. This concave portion 26 is formed to be able to engage with a convex portion 23-2P provided at the end of the holding piece 23-2,
The resistance board 11
The movable body 12 can be positioned relative to the movable body 12. For example, the first electrode terminal 15- of the movable body 12
If the concave portion 26 and the convex portion 23-2P are made to engage at the limit position of sliding toward the first side,
The limit position of the sliding position of the movable body 12 can be known by the click feeling when the two are engaged.

In this conventionally proposed slide type variable resistor, a resistor 13 is provided on one surface of a resistor substrate 11.
and strip-shaped current collectors 16 are arranged in parallel along the longitudinal direction. Therefore, the width of the resistor substrate 11 in the longitudinal direction must be sufficient to at least allow the resistor 13 and the band-shaped current collector 16 to be arranged in parallel, and this width limits the miniaturization of the resistor substrate 11. In addition, in order for the convex portions 23-1P and 23-2P of the elastic holding pieces 23-1 and 23-2 to elastically press against the side surface of the resistance board 11 adjacent to the surface on which the resistor 13 is formed, the movable body 12 The inner circumferential surface of the side piece 21-2 is pressed against the opposite side surface of the resistor board 11. For this reason, a slight gap is created between the side surface of the resistor substrate 11 on the current collector 16 side and the inner peripheral surface of the side piece 21-1.

Therefore, when sliding the movable body 12 against the resistance board 11 by pinching the knob 25 with your fingers, the movable body 12
is pressed against the resistor 13 side of the resistor board 11, and the inner peripheral surface of the side piece 21-2 and the resistor 1 of the resistor board 11
A gap is created between the three sides. If the movable body 12 is slid against the resistance board 11 in this state, the movement will be unstable and the sliding will not be carried out smoothly.Also, if you release your finger from the knob 25 when a certain resistance value is set, Since the movable body 12 moves toward the current collector 16 due to the elasticity of the pieces 23-1 and 23-2, the contact position between the contact piece 20-2 and the resistor 13 may shift. If this deviation exists, the accuracy of setting the resistance value of the variable resistor will decrease.
Further, due to this deviation, the contact piece 20-2 moves in a direction perpendicular to the arrangement direction of the resistors 13, which may generate sliding noise.

This invention solves the problems of the conventional sliding type variable resistor described above, and allows the movable body 12 to slide smoothly with respect to the resistance board 11, and has high self-setting accuracy in sliding resistance, and furthermore, the resistance board The present invention provides a variable resistor that can be significantly reduced in size in the width direction of 11 and has a robust structure.

According to this invention, a current collector is formed to extend substantially parallel to the resistor on a surface adjacent to the surface on which the resistor is formed of the resistor substrate on which the resistor is formed along the longitudinal direction. A movable body is provided that has two opposing side bodies facing each side of the resistor board and is slidably held relative to the resistor board. A slider that makes contact is attached.

Hereinafter, the slide type variable resistor of this invention will be explained in detail based on an embodiment thereof using the drawings.

The structure of the slide type variable resistor of the present invention is shown in FIGS. 3 to 5 with the same reference numerals given to the same parts as those of the conventionally proposed slide type variable resistor. In this embodiment, one resistor 13 is formed in the longitudinal direction of a resistor substrate 11, and the resistor substrate 11 is adjacent to the surface on which this resistor 13 is formed.
A current collector 16 is formed on the surface.

That is, as shown in FIG. 6, on a substantially rectangular plate-shaped resistor substrate 11, a strip-shaped resistor 13 and both ends of each resistor 13 are continuously connected in the longitudinal direction, as shown in FIG. Conductor 14-1,1
Form 4-2. At a position close to each end in the longitudinal direction of this resistance board 11, a mounting hole 30 is located approximately in the center of the resistance board 11 in the width direction, and a side surface 32 of the resistance board 11 adjacent to the surface on which the resistor 13 is formed. A mounting hole 31 is formed at a position close to .
Further, attachment holes 33 and 34 are formed near both ends of the conductors 14-1 and 14-2.

The current collector 16 is formed of a conductive material into a substantially rectangular shape, and one longitudinal edge thereof is bent at a right angle to form a contact surface 16-B. One end portion of the current collector 16 is extended on the plate surface in a direction opposite to the contact surface 16-B, and a mounting hole 35 is formed in this extended portion. At the end of the current collector 16 opposite to this extension, an engaging piece 3 perpendicular to the plate surface is located at a position facing the contact surface 16-B.
6 is formed.

The contact surface 16-B of this current collector 16 is connected to the resistor substrate 1.
The current collector 16 is placed in contact with the side surface 32 of the current collector 16.
is attached to the resistor board 11. At that time, the engaging piece 36 is inserted into the mounting hole 31 and engaged, and the current collector 16
The attachment hole 35 of the extension part is arranged at a position opposite to the attachment hole 30 of the resistance board 11.

As shown in FIG. 8, the slider 20 disposed on the plate-shaped base 18 made of an insulating material of the movable body 12 is
One end of the elastic contact piece 20 is formed into a bifurcated shape.
-1 and 20-2 are provided. These contact pieces 2
The end opposite to -1, 20-2 has a mounting hole 20-
H is formed, the end of which extends perpendicularly to the plate surface, and contact pieces 20-1, 20-2 are formed along the plate surface.
A contact piece 20-3 is formed by extending in the direction.
Slider 2 is mounted on base 18 using mounting hole 20-H.
Fix and install 0.

With the surface of the resistance board 11 on which the resistor 13 is formed and the surface of the movable body 12 on which the slider 20 is attached facing each other, the movable body 12 is attached to the resistance board 11 by its engagement ring 22. -1 and 22-2 are fitted and held. Movable body 12 relative to resistance board 11
The contact pieces 20 - 1 and 20 - 2 of the movable body 12 come into elastic contact with the resistor 13 while the contact pieces 20 - 3 are in contact with the contact surface 16 of the current collector 16 .
- in elastic contact with B.

As shown in FIG. 10, an electrode terminal 15 made of a conductive material is formed into a substantially rectangular plate shape, and one end of the electrode terminal 15 is narrowed in width to form a lead-out terminal 15-t. Also, this take-out terminal 15-
The end of the electrode terminal 15 opposite to t is integrally extended perpendicular to the plate surface to form a mounting piece 15-f.

Attachment pieces 15- of the electrode terminals 15 are attached to the attachment holes 30, 33, and 34 of the resistance board 11, respectively.
The first, second and common electrode terminals 15-1, 15-2, 15-3 are connected to the resistor board 11 by fitting f.
is taken out in the direction of the side surface where the contact surface 16-B of the conductor 16 of the resistor board 11 is disposed. Therefore, the first or second electrode terminal 15-1, 15
-2 and the common electrode terminal 15-3, the movable body 12
The resistance value corresponding to the sliding position on the resistor 13 is extracted.

The contact piece 20-3 has an elastic force in the direction of pressing the contact surface 16-B against the resistance board 11 when in contact with the contact surface 16-B. Therefore, there is no gap between the side piece 21-1 of the movable body 12 and the opposing side surface of the resistance board 11, and the resistance value can be set smoothly without rattling when the movable body 12 moves. It becomes possible.

11 to 13, the structure of which is shown by assigning the same reference numerals to the same parts is another embodiment of the slide type variable resistor of this invention. First and second resistors 13-1 and 13-2 are formed parallel to each other, and conductors 14-1 to 14-1 are connected to each resistor.
4 is formed. Further, first and second current collectors 16-1 and 16-2 are respectively provided on side surfaces 32-1 and 32-2 of the resistance substrate 11 adjacent to the surfaces on which the resistors 13-1 and 13-2 are formed. is provided.

The movable body 12 has the already explained slider 20 shown in FIG. 8 on its base body 18 as shown in FIG.
Two sliders 20-S connected by a connecting portion 20-C are attached at the end on the side where the mounting holes are formed.

An opening 40 is formed in the base 18 of the movable body 12 at a substantially central portion of the slider 20-S at a position where the slider 20-S is attached. With the slider 20-S fixedly attached to the base 18, the slider 20-S is removed from the opening 40 with a cutter.
Cut the connecting portion 20-C of S. By attaching the slider 20-S to the base 18 in this manner, the position of the slider 20-S relative to each of the resistors 13-1 and 13-2 can be accurately set and fixed.

Therefore, when the movable body 12 is fitted and attached to the resistance board 11, the contact pieces 20-21, 20-22 of the slider 20-S are connected to the first resistance body 13-
1, and the contact piece 20-32 is in elastic contact with the contact surface 16-B1 of the first current collector 16-1. Also, the contact piece 20- of the slider 20-S
11, 20-12 are in elastic contact with the second resistor 13-2, and the contact piece 20-31 is in contact with the second current collector 1.
It is in elastic contact with the contact surface 16-B2 of 6-2. With the movable body 12 fitted and attached to the resistance board 11, the electrode terminals 15 are inserted into each mounting hole 3.
0-1, 30-2, 33-1, 33-2, 34-
1, Attach and fix to 34-2.

According to this embodiment, a sliding variable resistor having two resistors 13-1 and 13-2 can be constructed in an extremely compact shape, and the contact piece 20
-31 and 20-32 are current collectors 16-1 and 20-32, respectively.
16-2 is pressed against the resistance board 11, the movable body 12 is fitted into the resistance board 11 without rattling, and smooth sliding is achieved.

In each embodiment, a structure was described in which the current collector 16 was formed separately from a conductive material and was attached to the resistor board 11.
As shown in Figure 0, resistors 13, 13-1 and conductors 14-1, 14-2, 14- connected thereto.
3, 14-4, the current collector 16 or 16
-1, 16-2, the resistor 13 of the resistor board 11,
It is also possible to form it on the surface adjacent to the surface on which 13-1 is formed, for example, by applying silver paint.

Furthermore, in each embodiment, the movable body 12 is formed with engagement rings 22-1 and 22-2, and the engagement rings 22-1 and 22-2 are formed on the movable body 12.
In 2-1 and 22-2, the structure in which the movable body 12 is fitted to the resistance board 11 has been described, but this engagement ring portion is not annular and engages from both sides of the resistance board 11. It is also possible to realize a structure in which a piece is formed and the engaging piece engages with the resistance board 11.

As explained in detail above, according to this invention, it is possible to provide a slide-type variable resistor which has a significantly smaller longitudinal width than conventionally proposed slide-type variable resistors, thereby enabling miniaturization, and which allows the slider to slide stably and smoothly against the resistance board, making it easy to set a stable resistance, and which is capable of high-precision, stable operation without noise caused by sliding misalignment of the slider.

[Brief explanation of drawings]

1 and 2 are front and side views, respectively, showing the configuration of a conventionally proposed sliding type variable resistor, and Figures 3, 4, and 5 are respectively showing the sliding type variable resistor of this invention. 6 is a diagram showing the shape of the resistance board of the embodiment of the slide type variable resistor of this invention, and FIGS. 7A and 7B are each of this invention. FIG. 8 is a front view and side view showing the shape of the current collector of the embodiment of the sliding variable resistor of this invention, FIG. 8 is a diagram showing the shape of the slider of the embodiment of the sliding variable resistor of this invention, and FIG. Figures A, B, and C are front, side, and rear views respectively showing the structure of the movable body of an embodiment of the slide type variable resistor of this invention, and Fig. 10 is an embodiment of the slide type variable resistor of this invention. FIGS. 11, 12 and 13 are front, rear and side views showing the configuration of other embodiments of the sliding variable resistor of this invention, respectively, and FIGS. The figure shows the shape of the resistance board used in another embodiment of the slide type variable resistor of this invention.
FIG. 15 is a diagram showing the shape of the current collector used in another embodiment of the slide type variable resistor of this invention, and FIG.
The figure shows the shape of the slider used in another embodiment of the sliding type variable resistor of this invention, Fig. 17A,
B and C are front, side, and rear views respectively showing the structure of the movable body used in other embodiments of the sliding variable resistor of this invention, and FIG. 18 is another embodiment of the sliding variable resistor of this invention. A diagram showing the shape of the electrode terminal used in the example, and FIGS. 19 and 20 are diagrams showing the structure of other examples of the current collector. 11: Resistance board, 12: Movable body, 13, 13-
1,13-2: Resistor, 16,16-1,16-
2: Current collector, 20, 20-1S, 20-2S: Slider, 20-1, 20-2, 20-11, 20-
12, 20-21, 20-22, 20-3, 20
-31, 20-32: Contact piece.

Claims (1)

[Scope of utility model registration request] a resistor substrate on which a resistor is formed along the longitudinal direction; a current collector extending substantially parallel to the resistor on a surface of the resistor substrate adjacent to the surface on which the resistor is formed; and the resistor substrate. a movable body having two opposing side bodies facing each other, and slidably held with respect to the resistor substrate; A slide type variable resistor characterized by having a slider in contact with the resistor.