JPH0682808U - Variable resistor for high voltage - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a high-voltage variable resistor which is easy to connect between terminals and to which no unreasonable force is applied to cause a disconnection at a terminal connection portion. [Structure] A terminal 4 is provided on the opening side of an insulating case 1. The connection terminal 6 electrically connected to the electric circuit housed in the insulating case 1, the conductive rubber 4a into which the connection terminal 6 is inserted, and the part into which the other terminal is inserted are electrically conductive. And a conductive rubber storage portion 4b for storing a conductive rubber. The terminal 4 is projected from the opening of the insulating case 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high-voltage variable resistor fixed to a flyback transformer via a molding resin.

[0002]

[Prior art]

 Conventionally, many variable resistors for high voltage, which are fixed to a flyback transformer via a molding resin, have been proposed. The general structure of this high-voltage variable resistor is that the operating axis of the variable resistor protrudes from the front part of the insulating case, and the opening side that opens to the side opposite to the front part is fixed to the flyback transformer via the molding resin. It will be done. The position of the output terminal will be determined according to the circuit configuration and mounting mode, but most high-voltage variable resistors have some terminal on the opening side.

[0003]

[Problems to be solved by the device]

 The terminals provided on the side of the opening covered with the molding resin are soldered to the ends of the lead wires and the connection conductors connected to the flyback transformer. However, the soldering work is a troublesome work, and there is a demand to reduce the soldering work as much as possible. Also, if the connection part is configured by soldering, excessive force will be applied to this connection part when filling the mold resin when mounting the high-voltage variable resistor in the flyback transformer or when the mold resin cures. There is a problem of disconnection.

An object of the present invention is to provide a high-voltage variable resistor in which terminals can be easily connected to each other and an unreasonable force that causes a disconnection at a terminal connecting portion is not applied.

[0005]

[Means for Solving the Problems]

 According to the present invention, the operation shaft of the variable resistor is projected from the front surface of the insulating case, the terminal is provided on the opening side opening to the side opposite to the front surface, and the opening side is connected to the flyback transformer through the mold resin. The target is a fixed high-voltage variable resistor. In the present invention, the above-mentioned terminal is inserted into the connection terminal which is electrically connected to the electric circuit housed in the insulating case, the conductive rubber into which the connection terminal is inserted, and the other terminal. And a conductive rubber storage portion for storing the conductive rubber while leaving a portion. Then, project the terminals from the opening of the insulating case.

[0006]

[Advantage of the Invention] According to the present invention, since the connecting portion can be formed only by inserting the mating terminal into the conductive rubber, the soldering operation when mounting the high voltage variable resistor to the flyback transformer is performed. Can be reduced. Also, since the conductive rubber is stored in the conductive rubber storage part, it receives force from the flow of the mold resin that is filled when mounting the high-voltage variable resistor in the flyback transformer, or when the mold resin cures. The conductive rubber does not move under the contracting force of. Moreover, since the conductive rubber serves as a cushioning material, no excessive force is applied to the connecting portion. Therefore, according to the present invention, it is possible to prevent the occurrence of disconnection in the connection portion.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partial sectional view of an embodiment of a high voltage variable resistor of the present invention mounted on a flyback transformer of a television. 2 shows a side view of the resistor of FIG.

In these drawings, reference numeral 1 denotes an insulating case formed of an insulating resin material, and a tubular projection portion through which the operation shafts 2a and 2b of the two variable resistors pass, respectively, on a front surface portion 1a of the case. Projections 1b1 and 1b2 are provided. The configuration itself of the variable resistor according to the present embodiment is well known, and therefore illustration and description thereof will be omitted. On one side wall portion 1c in the longitudinal direction of the case 1, a lead wire holding cylinder 3 that holds the lead wire integrally with the case 1 is provided in a protruding manner. A lead wire for pulling out the focus output to the outside is inserted into the lead wire holding cylinder 3. A flange portion 1e is provided around the opening 1d of the case 1.

A member indicated by reference numeral 4 protruding from the opening 1d side of the case 1 is a terminal for leading the ground of an electric circuit (not shown) arranged inside the case 1 to the outside. This terminal 4 constitutes one of a pair of terminals that form a connection portion, and the male electrode 5a of the other terminal (counterpart terminal) 5 that forms a connection portion is inserted into the terminal 4. The terminal 4 is composed of a cylindrical conductive rubber 4a forming a female electrode, and a cylindrical conductive rubber accommodating portion 4b having a notch 4c extending in the axial direction and having a substantially C-shaped cross section. It A connection terminal 6 connected to the ground circuit of a component housed in the case 1 is inserted into the conductive rubber 4a.

The terminal 5 provided on the other electric component (not shown) has a male electrode 5a having a sharp tip. The electrical connection between the two electric components can be made by inserting the male electrode 5a of the terminal 5 into the conductive rubber 4a of the terminal 4. In the embodiment shown in FIG. 1, the male electrode 5a is inserted from the end side of the conductive rubber accommodating portion 4b opposite to the case 1 in the axial direction, but the conductivity shown in FIG. It is also possible to insert the male electrode through the cutout portion 4c provided in the rubber housing portion 4b, that is, from the side surface side of the conductive rubber housing portion 4b.

The configuration of the terminal 5 is arbitrary, and the end portion of the lead wire drawn out from the electric component can be used as the terminal 5. In this case, the core wire of the lead wire constitutes the male electrode. In order to facilitate the insertion of the core wire of the lead wire, it is preferable to make the tip of the core wire of the lead wire sharp.

The rod-shaped member protruding toward the other end face 1 k side in the longitudinal direction of the case 1 is another connection terminal 8 made of a conductive metal material. Reference numeral 7 is a lead wire holding piece provided on the outer peripheral portion of the case 1 of the lead wire holding cylinder 3 near the side wall 1c. The lead wire holding piece 7 holds the lead wire drawn from the lead wire holding tube 3'for drawing the screen output to the outside. The lead wire holding piece 7 is provided with a fitting groove 7a into which the lead wire is fitted.

[0014]

[Effect of device]

 According to the present invention, since the connecting portion can be formed only by inserting the counterpart terminal into the conductive rubber, it is possible to reduce the soldering work when mounting the high voltage variable resistor on the flyback transformer. Also, since the conductive rubber is stored in the conductive rubber storage part, when the force is received from the flow of the mold resin that is filled when mounting the high voltage variable resistor in the flyback transformer, or when the mold resin hardens. Even if the contracting force is generated, the conductive rubber does not move, and since the conductive rubber serves as a cushioning material, an unreasonable force is not applied to the connection part, and the disconnection state occurs at the connection part. It can be prevented.

[Brief description of drawings]

FIG. 1 is a partial sectional view of an embodiment of a high voltage variable resistor according to the present invention.

FIG. 2 is a side view of the high voltage variable resistor shown in FIG.

[Explanation of symbols]

 1 Case 3 Lead Wire Holding Tube 4,5 Terminal 4a Female Electrode 4b Conductive Rubber Housing 4c Notch 5a Male Electrode

Claims (1)

[Scope of utility model registration request] 1. A flyback transformer in which an operating shaft of a variable resistor projects from a front surface of an insulating case, a terminal is provided on an opening side opening to the side opposite to the front surface, and the opening side includes a molding resin. In the high-voltage variable resistor fixed to, the terminal is a connection terminal electrically connected to an electric circuit housed in the insulating case, a conductive rubber pierced with the connection terminal, and a counterpart terminal. A variable resistor for high voltage, comprising: a conductive rubber storage portion that stores the conductive rubber, leaving a portion to be pierced, wherein the terminal projects from the opening of the insulating case.