JPH0797511B2 - High voltage connector for power supply and its integral molding method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a high voltage connector for a power source and a method for integrally molding the same, and more specifically, to a fixed resistor at one end of a high voltage wire for a required power source in a main body. TECHNICAL FIELD The present invention relates to a high-voltage connector for a power source, which is characterized in that a leaf spring is positioned in the center of an electrode sleeve fitting concave portion that is firmly fixed, and an integral molding method thereof.

[Prior Art] Conventionally, for example, a high voltage connector for a power source of a television, a copying machine or the like needs to be robustly manufactured due to its property, and one end of the high voltage electric wire for a required power source and an electrode sleeve are formed in the connector. A fixed resistor is built in between.

[Problems to be Solved by the Invention] In manufacturing such a high-voltage connector for a power supply, one end of a high-voltage electric wire for a required power supply, a fixed resistor, an electrode sleeve, and other members are manufactured by hand in a conventional molding die. It is manufactured by the so-called pot lid method that is incorporated from above.

However, since they are assembled by hand, it is difficult to position these parts in the mold, and due to the vibration of the machine that injects and injects the molten synthetic resin at a high pressure, these parts are moved or press-fitted from a predetermined position. There is a possibility that it will be displaced due to the resin.

Further, the molten synthetic resin may leak and flow into the unnecessary part insert recess.

Furthermore, it is extremely difficult to fix the connector at the required position accurately in the center position with respect to the surrounding insulator and coating layer, and to maintain the edge distance required for electrical products, which makes the assembly inefficient. there were.

Therefore, a method of setting the previously manufactured parts in the upper and lower molds is also conceivable, but since these parts are injection molded, these parts move from the required position, and as described above, the molten synthetic resin flows into the unnecessary part insert holes, which is not convenient there were.

Then, the manufacturing method becomes complicated, and the cost increase cannot be avoided.

Recently, a high-voltage connector for a power supply in which a plurality of electrodes are arranged in parallel has been proposed. However, in order to maintain the holding force of the contact leaf spring in each electrode constant, it is necessary to check the pressure with each finger. There is.

However, as the number of electrodes increases, the human sensory confirmation becomes inaccurate and inefficient.

In addition, in the caulking / bin type leaf spring according to the present invention, if used frequently, the holding force of the leaf spring is reduced due to metal fatigue, which often causes contact failure.

[Means for Solving the Problems] The present invention is intended to eliminate the above-mentioned drawbacks, and the gist thereof is to have a threaded groove in the lower inner periphery through a fixed resistor at one end of a required high-voltage electric wire. A step of fixing the upper end of the electrode sleeve; a step of fitting an insulating molten synthetic resin inflow prevention board and a spring seat to the outside of the electrode sleeve; the inflow prevention board, the spring seat and a screw on the electrode sleeve Screwing the leaf spring through the screw; fitting the leaf spring into a hollow cylindrical insert protruding from the lower mold; one end of these high-voltage wires, a fixed resistor, an electrode sleeve, A step of arranging a molten synthetic resin inflow prevention plate, a spring seat, and a screw in an upper mold which is divided into left and right parts, and combining the upper mold and the lower mold together to form a concave portion for molding the lower lower periphery of the block; A step of releasing the molten synthetic resin after cooling and curing And a high-voltage connector for a power source of the same.

[Operation] Therefore, according to the integral molding method according to the method of the present invention, one end of the required high-voltage electric wire, the fixed resistor, the molten synthetic resin inflow prevention plate, the spring seat, the leaf spring, etc. are arranged in the upper mold, and the lower part is formed. If the upper and lower molds are integrated by fitting the leaf spring in the center of the electrode sleeve fitting concave part protruding from the mold, the positioning becomes easy, and even if the molten synthetic resin is injected under high pressure, The wall of the fitting recess of the plug having an accurate thickness is formed around the outer periphery of the leaf spring without the members being displaced, and the wall of the fitting recess is used to hold the leaf spring to a predetermined strength. It is a structure that gives power and accelerates it.

Furthermore, this mold is applicable to both a connector having a plurality of electrodes and mass production.

[Embodiment] An embodiment in which a high voltage connector for a power source is molded by the mold according to the invention of this application will be described with reference to the accompanying drawings.

3 to 4, one end of a fixed resistor 12 is fixed in advance to one end of the required high voltage electric wire 10 by soldering or the like, and the other end of the fixed resistor is surrounded by the inner periphery 14b of the lower recess shown in FIG. The head 14a of the electrode sleeve 14 having the screw groove 14c formed therein is fixed.

Next, a molten synthetic resin inflow prevention board 16 shown in FIG. 4 is fitted around the outer circumference of the electrode sleeve 14, a spring seat 18 is fitted in the prevention board, and a caulking / bin-type leaf spring is fitted in the spring seat. 20 is screwed with a bolt 22 to be integrated.

These one end of the high voltage electric wire 10, fixed resistor 12, prevention board 16,
Leaf spring 20 is an upper mold shown in FIGS.
Hollow cylindrical insert 44, which is arranged in the cavity 32 of 30a, 30b and the fixed resistor 12 is arranged on the upper surface 42 of the lower mold 40.
Fit inside.

As shown in the drawing, a cylindrical through hole 31 into which one end of the high-voltage electric wire 10 is partially fitted is formed on the side surface 30c of the upper molds 30a and 30b, and the upper mold 30a is formed at each corner of the upper surface 42. Positioning pins 48 that can be freely fitted into the fitting recesses 36 formed on the lower surfaces of the upper and lower molds 30b, 30b, 30b, 30b, 40b, 30b, 40b, 40c, and 30d, so that the upper and lower molds 30a, 30b, 40 can be integrated together.

A molten synthetic resin inflow hole 34 is formed in the center of the upper mold 30.

In FIG. 7, a hollow cylindrical insert 44 for accommodating the leaf spring 20 has an upper surface of the lower mold 40 for forming the fitting hole 6 of the plug fitting portion 4 of the connector 2 and the outer periphery 8 thereof. A disc 44a arranged at 42 and a hollow cylinder 44b are integrally projected on the upper surface of the disc 44a with a gap 46 corresponding to the thickness of the fitting portion 4 therebetween.
Is made longer than the leaf spring 20 and is brought into contact with the lower surface of the prevention board 16 to fix the leaf spring, and the positioning pins 48 are fitted in the fitting recesses 36 of the upper dies 30a, 30b respectively. Mold 30a, b, 4
0 is integrated.

In this state, if the molten insulating synthetic resin is injected at a high temperature (about 300 ° C.) and a high pressure (70 kg / cm ² ) from the injection holes 34 of the upper molds 30a, 30b, the molten synthetic resin will enter the cavity 32. It is guided and has one end of the high-voltage electric wire 10, the fixed resistor 12 and the electrode sleeve 14 integrally incorporated therein, and further has a fitting hole 6 of the cylindrical plug fitting portion 4 having a constant thickness around the fixed resistor 12. The outer periphery 8 is formed.

When the molten insulating synthetic resin is cooled and cured and then released from the mold, the high-voltage connector 2 for power supply shown in FIG. 1 is molded.

[Effects of the Invention] As described above, according to the method of integrally molding a high-voltage connector for a power source according to the present invention, one end of the electric wire 10, the fixed resistor 12, the electrode sleeve 14, and the leaf spring 20 are integrated in the connector 2. Can have internal organs.

Since the outer end of the leaf spring comes into contact with the inner wall of the fitting hole 6 of the plug fitting portion 4 of the leaf spring 20, the holding force of the leaf spring is kept constant and a plug (not shown) is fitted. The leaf spring does not spread to the outside and does not cause contact failure due to metal fatigue.

Further, since the holding force of the leaf spring is kept constant, it is not necessary to check the pressure with each finger, and it is possible to mass-produce a connector having a plurality of electrodes.

Therefore, as compared with the conventional method in which these parts are manually assembled in the connector, the manufacturing process is remarkably improved and shortened, and a uniform product can be manufactured.

[Brief description of drawings]

FIG. 1 is a front view of a high-voltage connector for a power supply integrally molded by the method according to the present invention, FIG. 2 is a vertical cross-sectional view of FIG. 1, and FIG. 3 is a high-voltage built-in connector. An enlarged side view of a state in which a fixed resistor and an electrode sleeve are connected to one end of the electric wire, FIG. 4 is an exploded front view of FIG. 3, and FIG.
FIG. 6 is an enlarged partial sectional view of the electrode sleeve, FIG. 6 is a perspective view showing a state where the upper and lower molds are combined, and FIG. 7 is an enlarged vertical sectional front view of the upper and lower molds. 2 …… Connector; 4 …… Plug fitting part; 6 …… Plug fitting hole; 8 …… Outside of fitting part; 10 …… High-voltage electric wire; 12 …… Fixed resistor; 14 …… Electrode sleeve; 14a …… Head; 14b …… Inside of recess; 14c …… Screwed groove; 16 …… Prevention panel for molten synthetic resin; 18
...... Spring seat; 20 ...... Plate spring; 22 ...... Bolts; 30a, b …… Upper mold; 31 …… Cylindrical through hole; 32 …… Cavity; 34 ……
Molten synthetic resin injection hole; 36 …… Recessed pin fitting recess; 40 ……
Lower mold: 42 …… top surface; 44 …… hollow cylindrical insert; 48…
... positioning pin. 46 …… Cylindrical through hole.

Claims (2)

[Claims] 1. A step of fixing an upper end of an electrode sleeve having a threaded groove in a lower inner periphery through a fixed resistor to one end of a required high-voltage electric wire; Insulating molten synthetic resin inflow prevention on the outer side of the electrode sleeve. A step of fitting a plate and a spring seat; a step of screwing a plate spring to the electrode sleeve via the inflow prevention plate, the spring seat and a screw; and the plate spring arranged in a lower mold. A step of fitting in the hollow cylindrical insert; one end of these high-voltage electric wires, a fixed resistor, an electrode sleeve,
A step of arranging the molten synthetic resin inflow prevention plate, the spring seat, and the screw in the left and right divided upper molds and integrally combining the upper and lower molds to form a recess for molding the lower periphery of the connector; A method for integrally molding a high-voltage connector for a power supply, which comprises a step of injecting an insulating molten synthetic resin into a mold; and a step of releasing the molten synthetic resin after cooling and curing. 2. A fixed resistor is fixed to one end of the required high-voltage electric wire, the fixed resistor is fixed to the upper end of an electrode sleeve having a screw groove on the inner periphery of the lower portion, and an insulating melt is formed on the outer side of the electrode sleeve. A synthetic resin inflow prevention board is fitted, a spring seat is fitted in the prevention board, and a leaf spring is screwed to the spring seat with a screw, which is integrally molded in an insulating molten synthetic resin main body. Wherein the leaf spring is located in the center of the fitting recess of the main body, and a circumferential wall having an accurate thickness is formed to give the leaf spring an even and continuous holding force. A high-voltage connector for a power supply according to item (1).