JPS5919452B2 - variable resistor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a touch-type variable resistor equipped with a switch.

Conventional variable resistors have a slider that slides against the resistor to extract the resistance value to the outside, but when the slider moves, the contact between the slider and the resistor becomes unstable, and The disadvantage is that the structure is complicated because it requires a mechanism to move the slider.

The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to provide a variable resistor that eliminates the slider, has a simple structure, increases reliability, and has switches arranged in parallel.

The present invention will be explained below with reference to Examples.

FIG. 1 is a perspective view showing the basic structure of the present invention, in which a plate-shaped resistor 1 made of a suitable resistance material and a plate-shaped conductor 2 are placed on an insulating plate 3 with a slight distance between them. They are installed side by side.

Connection terminals 40 are provided at both ends of the plate-shaped resistor 1 and one end of the plate-shaped conductor 2, respectively. There are terminals 4 for connecting these to the external circuit.

Connect 42...

When the plate-shaped resistor 1 and the plate-shaped conductor 2 are pressed with a finger so as to bridge the plate-shaped resistor 1 and the plate-shaped conductor 2, the finger passes between the plate-shaped resistor 1 and the plate-shaped conductor 2 corresponding to the pressed position. is energized, and between the connection terminals 41 and 43, or between the connection terminals 4. and 4
2, a resistance value corresponding to the suppression position is taken out.

When the finger pressure is released, the resistance value between the connection terminals 41 and 43 or between the connection terminals 41 and 42 becomes almost infinite.

FIG. 2 is a perspective view showing the configuration that is the premise of the present invention, in which a plate-shaped resistor 1 with both ends fixed with a slight gap is arranged in parallel below a plate-shaped conductor 2 having spring properties. This is what I did.

The plate-shaped conductor 2 is supported and fixed at both ends so that the suppressing portion can curve and protrude downward when a downward pressing force is applied, and the plate-shaped resistor 1 is fixed at both ends.

In the figure, 5 is an insulating support.

When the appropriate upper position of the plate-shaped conductor 2 is pressed downward with a finger, the plate-shaped conductor 2 curves downward and the protruding portion corresponding to the suppressed position contacts the upper surface of the plate-shaped resistor 1. , a resistance value corresponding to the suppression position is taken out between the connection terminals 41 and 43 or between 42° and 43.

When the pressing force from the finger is released, the plate-shaped conductor 2 returns to its original state, and the resistance value between the connection terminals 41 and 43 or between 4□ and 43 becomes almost infinite.

FIG. 3 shows an embodiment of the present invention, in which the plate-shaped resistor 1 in the embodiment of FIG. Insulating board 6
, a plate-shaped conductor 7 and a plate-shaped conductor 8 are arranged side by side on the top and bottom with a small gap in between, and when the plate-shaped conductor 2 is pressed downward with a finger, the plate-shaped conductor 7 and the plate-shaped conductor 8 Both the resistor 1 and the insulating plate 6 receive the pressing force of the plate-like conductor 2 and project downward in a curved manner, causing the plate-like conductor 7 to project downward in a curved manner. The plate-shaped conductor 7
and the plate-shaped conductor 8 constitute a switch.

Of course, when the pressing force applied to the plate-shaped conductor 2 is released,
Plate conductor 2, plate resistor 1, insulating plate 6, plate conductor 7
, 8 return to their original states.

In the figure, 44 and 45 are connection terminals at both ends of the switch.

FIG. 4 shows an example of a circuit using the variable resistor of the present invention, in which a power supply voltage is applied across a resistor 1, and a conductor 2
The part is connected to a sample hold circuit consisting of an operational amplifier 9 and a capacitor 10, and a voltage Vs corresponding to the position pressed by the finger is obtained at the conductor 2 part, and the capacitor 10 is charged with this voltage Vs. Even after the pressing force is released, the voltage Vs of the capacitor 10 causes the operational amplifier 9 to
The voltage Vs can be extracted continuously from the output of the voltage Vs, and the variable range of the voltage Vs is from 0 to the power supply voltage.

As described above, the present invention has a plate-like resistor having a spring property disposed in parallel with a slight interval below the first plate-like conductor having a spring property that can be suppressed and bent. , any resistance value of the plate-shaped resistor can be obtained through the first plate-shaped conductor, the contact portion, and the plate-shaped resistor by simply pressing any place on the first plate-shaped conductor. Unlike conventional variable resistors, there is no need to take out the resistance value by sliding contact with a slider, so the mechanism is simple, the cost is low, and there is no risk of poor contact, etc., making it highly reliable. However, since the resistance value can be varied by changing the push position, the resistance value taken out can be varied continuously or discontinuously, and the conventional knob is no longer required and the structure is thin. This has the effect that it is also possible to do this.

Further, below the plate-shaped resistor, an insulating plate having spring properties, a second plate-shaped conductor, and a third plate-shaped conductor are sequentially arranged vertically in parallel with a small gap between them. When the first plate-shaped conductor is pressed from the plate-shaped resistor and the insulating plate,
The second and third plate-shaped conductors are in contact with each other to form a switch, and each member is formed into a plate shape, thereby forming a variable resistor and a switch. It also has the advantage of being able to be formed thin, and also has the advantage of being able to take out the resistance value and close the contact in one operation.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the basic configuration of the present invention, Figure 2 is a perspective view showing the basic configuration of the present invention.
The figure is a perspective view showing the configuration based on the same as the above, FIG. 3 is a perspective view of an embodiment of the present invention, and FIG. 4 is a side view of a circuit using the present invention. is the first plate-shaped conductor, 6
7 is an insulating plate, 7 is a second plate-shaped conductor, and 8 is a third plate-shaped conductor.

Claims (1)

[Claims] 1. A plate-shaped resistor having spring properties is disposed in parallel below a first plate-shaped conductor having spring properties that can be bent under pressure at a slight interval, and each spring resistor is arranged below the plate-shaped resistor. 1. A variable resistor comprising an insulating plate, a second plate-like conductor, and a third plate-like conductor arranged vertically in sequence with a small gap therebetween.