JPH0562004U - Rotatable variable resistor - Google Patents

Abstract

(57) [Abstract] [Purpose] Only the one terminal of a pair of terminals to which an AC voltage is applied should be adjacent to the output voltage extraction voltage extraction terminal to prevent deterioration of the frequency characteristics of the variable resistor. A rotary operation type variable resistor that can be used is provided. [Structure] Earth terminal 3 connected to one end of resistor 2
Is a voltage application terminal 4 connected to the other end of the resistor 2.
And a voltage lead-out terminal 6 derived from a slider sliding on the resistor 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary operation type variable resistor used as a volume of an audio device and the like, and particularly to improvement of its frequency characteristic.

[0002]

[Prior Art]

 A rotary operation type variable resistor used as a volume of an audio device generally has three terminals in the order of a ground terminal, a voltage extraction terminal, and a voltage application terminal on one side edge of a substrate provided with a resistor extending in an arc shape. They are arranged in parallel and are derived from a slider that slides on the resistor by applying a predetermined AC voltage between the voltage application terminal connected to both ends of the resistor and the ground terminal. A partial voltage between the voltage output terminal and the ground terminal is output.

[0003]

[Problems to be solved by the device]

 By the way, the conventional rotary operation type variable resistor described above has a terminal arrangement in which a ground terminal and a voltage application terminal, which are abbreviated as 1, 3 terminals, are arranged on both sides of a voltage output terminal which is abbreviated as 2 terminals. However, such a terminal arrangement has a ground terminal and a voltage application terminal on both sides of the voltage output terminal, which is the output terminal, which adversely affects the frequency characteristics of the variable resistor and, in turn, the variable resistor. The sound quality of audio equipment using resistors was deteriorated.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a rotary operation type variable resistor capable of preventing deterioration of frequency characteristics.

[0005]

[Means for Solving the Problems]

 The above-mentioned object of the present invention is derived from a pair of terminals connected to both ends of a resistor extending in an arc shape on the substrate and to which an AC voltage is applied, and a slider sliding on the resistor. In the rotary operation type variable resistor in which the voltage take-out terminal and the voltage take-out terminal are arranged in parallel at one end of the substrate and the partial voltage between one of the pair of terminals and the voltage take-out terminal is output, Is achieved by positioning one terminal of the pair of terminals to which is applied between the other terminal and the voltage extraction terminal.

[0006]

[Action]

 According to the above means, since only one of the pair of terminals to which the AC voltage is applied is adjacent to the voltage output terminal, it is difficult to adversely affect the frequency characteristic of the variable resistor.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is a perspective view showing a resistor forming surface of a substrate of a rotary variable resistor, FIG. 2 is a rear view of the substrate, FIG. 3 is a side view of the variable resistor, and FIG. 4 is another embodiment. It is a principal part perspective view of an example.

In these figures, a resistor 2 extending in an arc shape is formed on the surface of a substrate 1 of the variable resistor, and a ground terminal 3 connected to one end of the resistor 2 and the other end. The voltage application terminals 4 connected to the parts are arranged side by side at one end of the substrate 1 and led out from the slider 5 sliding on the resistor 2 via the metal lead 7. A voltage take-out terminal 6 is juxtaposed at a position adjacent to the ground terminal 3 on the back surface of the one end of the substrate 1. That is, the arrangement of the three terminals arranged side by side at one side of the board 1 is different from the conventional terminal arrangement in which the so-called 2 terminals are located between the 1 and 3 terminals, and the so-called 1 terminal is 2 terminals. It is located between three terminals, and two terminals are provided on the surface of the substrate 1 opposite to the surface on which the resistors are formed. Therefore, only the ground terminal 3 is adjacent to the voltage output terminal 6, and the frequency characteristics of the variable resistor are unlikely to be adversely affected.

Although the voltage lead-out terminal 6 may be provided on the resistor forming surface of the substrate 1 like the grounding terminal 3 and the voltage applying terminal 4, the voltage lead-out terminal 6 may be provided on the back surface of the substrate 1 as in the above embodiment. It is more effective to provide it because the stray capacitance between the ground terminal 3 and the voltage application terminal 4 can be reduced.

Further, in the above embodiment, the voltage lead-out terminal 6 is provided on the rear surface of the resistor forming surface and the metal lead 7 is extended from the rear surface of the resistor forming surface. However, as shown in FIG. The lead pattern 8 may be provided on the resistor forming surface, and the slider 5 may slide on the resistor 2 and the lead pattern 8.

[0011]

[Effect of the device]

 As described above, according to the present invention, since only one of the pair of terminals to which the AC voltage is applied is adjacent to the voltage output terminal, the frequency characteristic of the variable resistor is adversely affected. It becomes difficult to exert.

[Brief description of drawings]

FIG. 1 is a perspective view showing a resistor forming surface of a substrate of a rotary operation type variable resistor according to an embodiment of the present invention.

FIG. 2 is a rear view of the substrate.

FIG. 3 is a side view of the variable resistor.

FIG. 4 is a perspective view showing a resistor forming surface of a substrate of a rotary operation type variable resistor according to another embodiment of the present invention.

[Explanation of symbols]

 1 substrate 2 resistor 3 ground terminal 4 voltage application terminal 5 slider 6 voltage extraction terminal 7 metal lead 8 lead pattern

Claims (2)

[Scope of utility model registration request] 1. A pair of terminals connected to both ends of a resistor extending in an arc shape on a substrate to which an AC voltage is applied, and a voltage lead terminal derived from a slider sliding on the resistor. In a rotary operation type variable resistor which is arranged in parallel at one end of the substrate and outputs a partial voltage between one of the pair of terminals and the voltage output terminal, to which an AC voltage is applied. A rotary operation type variable resistor, wherein one terminal of a pair of terminals is located between the other terminal and the voltage output terminal. 2. The rotary operation type variable resistor according to claim 1, wherein a voltage output terminal is provided on a surface of the substrate opposite to a surface on which the resistor is formed.