JPH08594U - High voltage generator - Google Patents

Abstract

(57) [Abstract] [Problem] Bubbles may remain in the cured molding resin.
Also, a high-voltage generating device in which cracks are less likely to occur is provided. SOLUTION: A variable resistor for high voltage, in which operation shafts 2a and 2b of a variable resistor are projected from a front surface of an insulating case 1 and a terminal 4 is provided in an opening opening to the side opposite to the front surface, is provided in the opening. It is fixed to the flyback transformer via the filled mold resin. A connection terminal 6 electrically connected to the electric circuit housed in the insulating case 1, a conductive rubber 4a into which the connection terminal 6 is inserted, and a counterpart terminal 5a.
And a conductive rubber storage portion 4b for storing the conductive rubber 4a, leaving a portion to be inserted. As the conductive rubber storage portion 4b, one having a cylindrical wall portion is used.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a high voltage generating device in which a high voltage variable resistor is fixed to a flyback transformer via a molding resin.

[0002]

[Prior art]

 Conventionally, many high voltage generators have been proposed in which a high voltage variable resistor is fixed to a flyback transformer via a molding resin. The general structure of the high-voltage variable resistor used in this device is that the operating axis of the variable resistor projects from the front part of the insulating case, and the opening side that opens to the side opposite to the front part is connected to the flyback transformer via the molding resin. It is fixed. The position of the output terminal is determined according to the circuit configuration and the 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 generator which is easy to connect between terminals and which is free from an excessive force that may cause a disconnection at a connecting portion of the terminals.

Another object of the present invention is to provide a high voltage generator in which air bubbles are not left in the cured molding resin and cracks are less likely to occur.

[0006]

[Means for Solving the Problems]

 According to the present invention, the operation shaft of the variable resistor is protruded from the front surface of the insulating case, and a high voltage variable resistor having a terminal provided in an opening opening to the side opposite to the front surface is filled in the opening. The target of the improvement is a high-voltage generator that is fixed to the flyback transformer via a molding resin.

In the present invention, the above-mentioned terminal is pierced by a connecting terminal electrically connected to an electric circuit housed in an insulating case, a conductive rubber pierced by the connecting terminal, and a mating terminal. It is composed of a conductive rubber storage part that stores the conductive rubber, leaving the remaining part. As the conductive rubber storage portion, one having a cylindrical wall portion is used.

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, 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 even if it receives 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 at the connection portion.

In particular, as in the present invention, the use of a conductive rubber storage portion having a cylindrical wall portion provides the following effects. For example, if a conductive rubber storage section having a square shape is used as the conductive rubber storage section, this conductive rubber storage section provides a large resistance to the flow of the mold resin and also prevents the mold resin from wrapping around. , Bubbles will be left in the molding resin. Further, when the conductive rubber housing having many corners is embedded in the mold resin, cracks are likely to occur in the cured mold resin. This is because cracks are more likely to occur from the corners of the conductive rubber storage section, so the more corners that are formed in the conductive rubber storage section, the more easily the cured mold resin will crack. Because it will be. On the other hand, when the conductive rubber storage portion having the cylindrical wall portion is used as in the present invention, the above problem does not occur.

[0010]

[Embodiment of device]

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

FIG. 1 is a partial cross-sectional view of an example of a high-voltage variable resistor that constitutes a high-voltage generator in combination with a flyback transformer of a television. 2 shows a side view of the resistor of FIG.

In these figures, 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 denoted by reference numeral 4 protruding from the opening 1d side of the case 1 is a terminal for leading out the ground of an electric circuit (not shown) arranged inside the case 1 to the outside. The terminal 4 constitutes one of a pair of terminals constituting a connecting portion, and the male electrode 5a of the other terminal (counterpart terminal) 5 constituting the connecting portion is inserted into the terminal 4. The terminal 4 contains a cylindrical conductive rubber 4a that forms a female electrode and a cylindrical conductive rubber 4a that has a notch 4c that extends in the axial direction in a cylindrical wall and has a substantially C-shaped cross section. It is composed of a part 4b. A connection terminal 6 connected to a 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 housing portion 4b opposite to the case 1 in the axial direction, but the conductive rubber housing portion 4b shown in FIG. It is also possible to insert the male electrode through the notch 4c provided in the portion 4b, that is, from the side surface side of the conductive rubber accommodating 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 projecting to 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.

[0017]

[Effect of device]

 According to the present invention, since the conductive rubber is stored in the conductive rubber storage portion having the cylindrical wall portion, the flow of the mold resin filled when mounting the high-voltage variable resistor in the flyback transformer is reduced. The conductive rubber does not move even when subjected to a force or a contracting force generated when the molding resin is cured, and since the conductive rubber serves as a cushioning material, an unreasonable force is applied to the connection part. Therefore, it is possible to prevent the occurrence of wire breakage at the connection part.

In particular, as in the case of the present invention, when the conductive rubber storage portion having a cylindrical wall portion is used, the mold resin easily wraps around, and air bubbles remain in the cured mold resin or cracks are generated. Less likely to occur.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of an example of a high voltage variable resistor used in a high voltage generator of the present invention.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 case 3 lead wire holding cylinder 4,5 terminals 4a conductive rubber 4b conductive rubber housing 4c notch 5a male electrode

Claims (1)

[Scope of utility model registration request] 1. A variable resistor for high voltage, wherein an operating shaft of a variable resistor projects from a front surface of an insulating case, and terminals are provided in an opening opening to the side opposite to the front surface. In the high-voltage generator fixed to the flyback transformer via the molded resin, the terminal includes a connection terminal electrically connected to an electric circuit housed in the insulating case, and the connection terminal. The conductive rubber accommodating portion is composed of a conductive rubber accommodating portion and a conductive rubber accommodating portion for accommodating the conductive rubber, leaving a portion at which a counterpart terminal extending from the flyback transformer side is stabbed. A high voltage generator having a wall-like shape.