CN1086627A

CN1086627A - Durable potentiometer

Info

Publication number: CN1086627A
Application number: CN 92112668
Authority: CN
Inventors: 陈克新; 陈克明
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-11-04
Filing date: 1992-11-04
Publication date: 1994-05-11

Abstract

The invention reside in to electrical equipment manufacturer a kind of novel durable potentiometer is provided.The media of its technical characterictic for adopting mercury metal to contact with carbon film as the potentiometer target.Rotating inner box and fixing outer box is one, mercury is injected inner box shut, and mercury is contacted with the annular electrode and the carbon film of centre in the bottom of middle ring, has fundamentally solved the problem that existing potentiometer carbon film damages easily.

Description

Durable potentiometer

The present invention is a kind of improvement potentiometer, relates to the regulation and control category in fields such as broadcasting, TV, instrument, instrument.

Existing rotary carbon-film potentiometer, its operation principle are that the sheet metal by target is pressed on the carbon film, come back rotation to go to realize the adjusting of potential difference.This potentiometer carbon film damages easily, and useful life is not long, with the electric equipment products that this potentiometer is made, has coverd with the shade of one deck product quality to the user.

Main task of the present invention is to electrical equipment manufacturer provides a kind of overall dimension constant, and the durable potentiometer that working method is identical is that starting point designs with the quality reputation of safeguarding electrical equipment manufacturer product and the behaviour in service of considering the user.

Task of the present invention realizes as follows: the metal clips that reaches generation and carbon film friction with mercury metal as the contact medium of target and carbon film.Thereby potentiometer is when regulating, and its carbon film almost is in no state of wear, has strengthened the stability of its work, has fundamentally solved the life problems of existing potentiometer carbon film.

Below, just the present invention is explained as follows:

Fig. 1, Fig. 2, Fig. 3 is plane graph.

The structure of durable potentiometer as shown in Figure 1.It mainly rotates inner box by one and a fixing outer box is formed, and it rotates inner box by Fig. 2-1, and 2-2 and 2-3 constitute, and the substrate among Fig. 2-1 (8), carbon film (4), carbon film extraction electrode (7), axis hole (9) are formed the front shroud of rotation box; Annular cover (2) among Fig. 2-2, annular electrode (3), electrode are drawn shell fragment (25), fulcrum (11), the location middle annular ring of (6) composition slightly; Cover plate among Fig. 2-3 (14), orifice (15), axis hole (16) are formed back shroud.The size of fixed bin, be that front shroud, back shroud or middle annular ring are all more roomy than rotation box, like this, the rotation box of internal layer changes or middle annular ring is all more roomy than rotation box, like this, rotate just can be not influenced for the rotation box of internal layer.Fixed bin is made up of front shroud, intermediate annular circle and back shroud equally, and wherein the substrate (1) among Fig. 3-1, plane electrode (17), extraction electrode (13), location notch (12), axis hole (10) are formed front shroud; Middle annular ring is formed in annular cover (18) among Fig. 3-2, forward and backward location (19,20) slightly; Back shroud among Fig. 3-3 (21), anchor point (22), location notch (23), spill fulcrum (24) are formed back shroud.

Key point of the present invention be exactly suitably regulate target and annular ring bottom and carbon film apart from distance, the about 1-2 millimeter of distance of general bonnet and carbon film, the about 0.5-1 millimeter in the bottom of target and annular ring, the distance distance of target and carbon film is about the 0.5-1 millimeter.After spacing is determined, with the forward and backward cover plate among Fig. 2 respectively concora crush on two faces of annular ring (11), then with seccotine with two faces all ring-type shut.The rotation axis that square width is equaled the rotation box height just penetrates the axis hole in the rotation box, after putting in place, with seccotine with rotation axis and axis hole all the both sides ring-type shut, toward the mercury of orifice (15) injection match end size, (15) are shut, in case mercury vapour pond outward.With the forward and backward cover plate of fixed bin and intermediate annular figure respectively from the two ends shape of the rotation box axle that fixed, to aim at three plane electrodes from three electrodes (resilient contact) that rotation box is drawn can compress, before the forward and backward location of annular ring sticked into slightly, the location notch of back shroud flattened and get final product (can with a metallic plate of being with the cored screw bar together with front shroud together on the bolt).

Claims

1, the rotary carbon-film potentiometer of a kind of no switch, its technical characterictic is: adopting and rotating inner box is one with fixing outer box, and target is connected with mercury with carbon film to be realized.

2, its technical characterictic of a kind of potentiometer with switch requires to state in 1 as claim.

3, a kind ofly regulate the balanced type potentiometer of potential difference with gradient, its technical characterictic is: be used as the contact of target with mercury.