JP2612500B2 - High voltage connector for power supply and method of manufacturing the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a high-voltage connector for a power supply and a method of manufacturing the same, and more particularly, to a high-voltage connector for a power supply of a copier, a facsimile, a printer, and the like, and a method of manufacturing the same. .

"Prior art" Conventionally, for example, high-voltage connectors for power supplies of copiers, facsimile machines, printers, etc., need to be manufactured robustly because high voltages of 10, 20, 30 kv, etc. are applied thereto. A fixed resistor is connected between one end of the high voltage electric wire and the electrode sleeve.

For example, in the known example shown in FIG. 11, one end of a fixed resistor 40 is connected to the inner end of a high-voltage power supply wire, and a brass sleeve is connected to the other end of the fixed resistor. A coil spring is connected to the lower end of the copper sleeve, and a part of the inner end of the high-voltage wire, the fixed resistor, and a part of the brass sleeve are buried and molded in an insulating synthetic resin connector body, The coil spring protrudes from a plug fitting recess of the connector body.

"Problems to be Solved by the Invention" However, in such a high-voltage connector for power supply, a fixed resistor and the brass sleeve are separately provided in the connector main body, so that a considerable space is taken. The connector body becomes large, and there is a risk of disconnection due to molding pressure during molding,
Since the fixed resistor is directly incorporated in the main body, it is directly affected by the molding heat, the resistance value is easily changed, and metal powder is mixed at the time of molding, and between the fixed resistor and the insulated wire. Since the distance is short, the wire may be disconnected, or may not be electrically and mechanically stable. In addition, an increase in processing cost and an increase in weight of the product cannot be avoided.

"Means for Solving the Problems" The present invention eliminates the above-mentioned drawbacks. The gist of the present invention is to form a cylindrical upper part having a spiral groove around it and an integral part below the cylindrical upper part. An insulative synthetic resin main body having a cylindrical lower part for fixing the spring smaller than that, and a cylindrical projection smaller than that formed from the entrance of the cylindrical upper part, and a lower part in the center longitudinal direction. A fixed resistor fitting cylindrical recess formed toward the bottom, and a fixed resistor lead wire through-hole formed from the inner bottom of the cylindrical recess to near the lower center curved bottom. From a location outside the cylindrical projection at the top, parallel to the cylindrical recess,
A fixed resistor built-in holder having a spring fitting groove formed around the spiral groove; and a fixed resistor built-in holder fitted inside the cylindrical concave portion of the fixed resistor built-in holder, and one of the inner ends of the high voltage electric wire. A fixed resistor to which a lead wire is connected and which is guided to the outside through the other lead wire through the through hole and connected to a conical lower end; A hook ring wound around the projection and a linear portion fitted into the spring fitting groove are formed below the hook ring, and the linear portion is wound around the small diameter portion of the insulating synthetic resin body below the linear portion. A conductive spring having a small diameter spring and a conical lower end integrally connected to a lower portion of the small diameter spring and a spiral projecting bottom connected thereto; the upper hook ring of the conductive spring is connected to the fixed resistor. Internal organ holder After being wound on the cylindrical projection, the direct part thereof is fitted into the spring fitting groove, the intermediate part thereof is wound on the small-diameter spring fixing cylindrical lower part, and the conical lower end part and the spiral projection bottom part are wound. The inner end of the high-voltage wire and the fixed resistor built-in holder are buried in an insulating synthetic resin body, and the inner end of the high-voltage wire and the fixed resistor built-in holder are buried in the conical lower end of the conductive spring. By guiding the spiral projection bottom and the concave portion of the insulating synthetic resin main body, there is no mixing of metal powder at the time of molding, disconnection, and unnecessary contact, and there is no change in the resistance value of the built-in fixed resistor. Since the resistance value after molding is not required, and the distance between the insulated wire is large, it is electrically and mechanically stable, the material can be saved, the whole product is downsized, and the processing cost is reduced. High voltage connector for power supply And to provide its manufacturing method.

[Configuration] A high-voltage connector for a power supply according to the invention of the present application and a method of manufacturing the same will be described with reference to the accompanying drawings.

1 to 10, a power supply high-voltage connector C is formed by a lower mold 10, an upper mold 12, and a core 14.

First, in FIGS. 5 to 7, a pre-molded fixed resistor built-in resistor 20 made of insulating synthetic resin is provided with a spiral metal
A cylindrical upper part 22 formed with 22a, and a cylindrical lower part 24 for fixing a spring having a small diameter integrally formed below the cylindrical upper part 22, and a lower part in a central longitudinal direction of the cylindrical upper part 22. A cylindrical recess 22b for fitting a fixed resistor is formed toward the bottom, and a cylindrical projection 2 is formed upward from the entrance of the cylindrical recess 22b.
2c is formed, and the lead wire through hole 24b of the fixed resistor 40 is formed from the inner bottom of the cylindrical concave portion 22b to the vicinity of the lower center curved bottom portion 24a so as to lead around the cylindrical lower portion 24 at a right angle.

Further, from the upper part to the lower part of the spiral groove 22a of the holder 20, a notch 22d for spring fitting is formed in parallel with the cylindrical concave part 22b.
To form

The conductive spring 30 shown in FIGS. 8 and 9 has a hook ring 30a at the upper part, and forms a linear part 30b at the lower part thereof so that it can be freely fitted into the fitting notch 22d of the holder 20. A lower portion of 30b has a cylindrical portion 30c wound around a small-diameter spring-fixing cylindrical lower portion 24, and a conical portion is formed below the cylindrical portion 30c.
30d and a spiral projection 30e.

The hook ring 30a of the conductive spring 30 is wound around the cylindrical projection 22c of the cylindrical upper part 22 of the holder 20, and its linear portion 3
0b is fitted into the cut 22d, the cylindrical portion 30c is wound around the cylindrical lower portion 24, and the conical lower end portion 30d and the spiral projection 30e are projected downward from the cylindrical lower portion 24.

Cylindrical recess 22 for fitting the fixed resistor built-in holder 20
The fixed resistor 40 is inserted into b, one lead wire 40a of the fixed resistor 40 is connected to the inner end of the high-voltage electric wire 50, and the other lead wire 40b is passed through the lead wire through hole 24b. It is guided externally from the cylindrical lower portion 24 and connected to the corresponding portion of the cylindrical portion 30c of the conductive spring 30 by soldering or the like.

The fixed resistor built-in holder 20 integrated in this way
Is inserted into the cavity 10a of the lower mold 10 as shown in FIG. 10, and the conical lower end portion 30d wound around the cylindrical lower portion 24 of the holder 20 and the cylindrical lower portion 24 of the conductive spring 30 and a spiral projection. 30e is guided into the cavity 10a of the lower mold 10, and the core 14 holds the lower mold 10 and the upper mold 12 together to form a part. Through the inlet 12b formed at the center of the upper part of the upper mold 12, and melt the insulating synthetic resin at a high temperature (about 300 ° C.) and a high pressure (70 kg / cm).
² ) Inject and inject.

After the synthetic resin is cooled and hardened, it is removed from the mold to obtain a high-voltage connector C for power supply shown in FIGS.

According to the manufacturing method of the present invention as described above, the fixed resistor built-in holder 20 is molded in advance with an insulating synthetic resin, and the fixed resistor 40 is inserted into the cylindrical concave portion 22b of the holder 20,
The hook ring 30a of the conductive spring 30 is fitted into the cylindrical projection 22c, and the straight portion 30b is fitted into the cut 22d, thereby forming the cylindrical portion 30.
c is wound around the cylindrical lower portion 24, and the conical lower end portion 30d and the spiral projection 30e are made to protrude downward from the cylindrical lower portion 24 and integrated into the upper and lower molds 12, 10 and the core 14. Guided and fixed, a molten insulating synthetic resin is injected at a high temperature and a high pressure from an injection port 12b of the upper mold 12, and the synthetic resin is cooled and hardened, and then demolded to obtain a power supply high-voltage connector c. It is.

[Effect] According to the method for manufacturing a high-voltage connector for a power supply according to the present invention, since the fixed resistor 40 is inserted into the cylindrical concave portion 22b of the fixed resistor built-in holder 20, metal powder may be mixed during molding. No disconnection, no need for contact, no change in the resistance of the built-in fixed resistor, no need to measure the resistance after molding, and a large distance between the insulated wire, electrical and mechanical Thus, a high-voltage connector for a power supply can be obtained, which is stable in terms of material, can save material, reduces the size of the whole product, and reduces processing costs.

Further, since a spiral groove 22a is formed around the cylindrical upper portion 22 of the holder 20, the holder 20 is
The holder 20 is stable even when the lower mold 10 and the core 14 are united with each other, and the molten insulating synthetic resin is injected into the inlet 12b.
Does not move when injected from.

Moreover, a conical lower end 3 is formed in the cavity 10a of the lower mold 10.
The hook ring 32a of the conductive spring 30 from which the spiral projection 30e and the spiral projection 30e protrude is fitted to the cylindrical projection 22c, and the linear portion 30b
Are fitted into the cuts 22d, and therefore do not move at all even by injection and injection of the molten insulating synthetic resin.

The plug (not shown) inserted into the conical lower end 30d of the conductive spring 30 projecting into the power supply high-voltage connector c and the spiral projection 30e surely comes into contact with each other. There is no.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a state of implementing a power supply high-voltage connector according to the present invention and a method of manufacturing the same. FIG. 1 is a front view of a power supply high-voltage connector manufactured by the method of the present invention. FIG. 3 is a longitudinal sectional view of FIG. 1, FIG. 3 is a partially cutaway perspective view of the high-voltage connector for power supply of FIG. 1 and FIG.
The figure is a front view of one end of a power supply high-voltage wire taken out of the high-voltage connector for power supply of FIGS. 1 and 2 and a front view of a fixed resistor, and a cross-sectional view of a fixed resistor built-in holder. FIG. FIG. 6 is a plan view of a fixed resistor built-in holder, FIG. 7 is a cross-sectional view of the fixed resistor built-in holder, FIG. 8 is a schematic front view of a conductive spring,
9 is a plan view of FIG. 8, and FIG. 10 is a partial cross-sectional perspective view showing a state in which a fixed resistor built-in holder and one end of a power supply high voltage wire are fitted into upper and lower molds and molded. FIG. 11 is a partially cutaway perspective view of a conventional high-voltage connector for power supply. C: High voltage connector for power supply; 10: Lower mold; 10a: Cavity; 12: Upper mold; 12a: Cavity; 12b: Injection port: 14: Core; 22 …… Cylindrical upper part; 22a …… Helical groove; 22b …… Cylindrical recess for fitting a fixed resistor; 22c …… Cylindrical projection; 22d …… Cut for fitting; 24 …… Cylindrical lower part for fixing spring of small diameter; 24a …… Curved bottom part; 30 …… Conductive spring; 30a …… Hook ring; 30b …… Linear part; 30c …… Cylindrical part; 30d …… Conical part 30e: spiral projection; 40: fixed resistor; 40a, 40b: lead wire; 50: high-voltage electric wire.

Claims (2)

(57) [Claims] 1. A cylindrical upper part having a spiral groove formed therearound, a lower part of a cylindrical part for fixing a spring having a smaller diameter formed integrally below the cylindrical upper part, and an upper part from an inlet of the circular upper part. An insulating synthetic resin main body having a cylindrical projection with a smaller diameter than that formed therein, and a cylindrical recess for fitting a fixed resistor formed downward in the center longitudinal direction,
A fixed resistor lead through-hole formed from the inner bottom of the cylindrical recess to the vicinity of the center downward curved bottom, and the cylindrical recess is formed at a position outside the cylindrical projection at the top of the cylindrical shape; A fixed resistor built-in holder having a spring fitting groove formed around the spiral groove in parallel; and an inner end of the high-voltage electric wire fitted inside the cylindrical recess of the fixed resistor built-in holder. A fixed resistor connected to one end of the lead wire, the other lead wire being passed through the through hole and guided to the outside, and connected to a conical lower end portion described later; and an upper portion made of the insulating synthetic resin. A hook ring wound around the small-diameter cylindrical projection of the main body, and a linear portion fitted in the spring fitting groove formed below the hook ring, and a lower portion of the insulating synthetic resin main body formed at a lower portion of the linear portion. A small-diameter spring to be wound and the small-diameter spring A conductive spring having a conical lower end integrally connected to a lower portion of the coil and a bottom of a spiral projection connected thereto; and an inner end of the high-voltage electric wire and the holder for incorporating the fixed resistor being electrically insulated. A high-voltage connector for a power supply, which is embedded in a synthetic resin main body and guides the conical lower end of the conductive spring and the spiral projection bottom to a concave portion of the insulating synthetic resin main body. 2. A fixed resistor having one lead connected to the inner end of a high-voltage power supply wire is inserted into a fixed resistor fitting recess of a fixed resistor built-in holder, and the other lead is connected to the fixed resistor. Guiding the conductive spring outward and connecting it to the corresponding portion of the cylindrical portion of the conductive spring by soldering or the like; winding the upper hook ring of the conductive spring around the cylindrical protrusion of the fixed resistor built-in holder. After turning, the straight portion is fitted into the groove for spring fitting, and the middle portion is wound around the small-diameter spring fixing cylindrical lower portion, and the conical lower portion and the spiral projection bottom are removed from the small-diameter spring fixing cylindrical lower portion. Projecting; providing a base of the fixed resistor built-in holder in a cavity of an upper mold, and winding the fixed resistor built-in holder on the lower cylindrical portion for fixing the small diameter spring and the lower portion of the fixed cylindrical shape. Times The conical lower end of the conductive spring and the bottom of the spiral projection are arranged in a cavity of a lower mold, fixed with a core, and after the upper mold and the lower mold are united, melted. Injecting an insulating synthetic resin, removing the mold after the molten insulating synthetic resin is cured, and removing the mold.