JPH024475Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose" (Industrial field of application) This invention relates to a jig for molding a high voltage connector with a built-in fixed resistor, more specifically a jig for molding a high voltage connector with a built-in fixed resistor for power cords. Regarding ingredients.

(Prior art) For example, a connector for a power cord of a copying machine, etc.
Since a high voltage of tens of thousands of volts is applied, it must be manufactured to be robust, but in order to protect the high voltage connector 1 of the copier body and power cord, a fixed resistor 2 is installed on the high voltage power wire inside the connector. It is conceivable to connect them and mold them in one piece.

(Problem to be solved by the invention) When a power supply wire is connected by soldering to a fixed resistor led into a high voltage connector and then led directly into a mold for injection molding, its positioning and the fixing method is difficult, and high temperature (approximately 300℃) and high pressure (approximately
70Kg/1cm ² ), the fixed resistor is directly affected, and the resistance value changes or decreases due to soldering heat, molding heat, and molding pressure, making it impossible to obtain the resistance value required by safety standards. Connectors often become unusable.

Therefore, as shown in Fig. 8, there is also a method of covering the fixed resistor 2 to be soldered to the power supply wire within the high voltage connector with a heat resistant tube 6, guiding it into the mold, and injecting molten resin to mold it. Although it has been proposed, it is often compressed by high temperature and high pressure, which affects the resistor 2, causing the resistance value to deteriorate and making it unusable.

This invention aims to eliminate the above-mentioned drawbacks, and its gist is that it is fixed in a hollow cylinder made of non-green hard synthetic resin, which has fixing protrusions around both ends for positioning and molding, and spacers on each end surface. This is a jig for molding a high voltage connector with a built-in fixed resistor when integrally molding a resistor fitted and a power supply wire connected to the resistor into a connector body.

"Structure" An embodiment of the molding jig according to this invention shown in FIGS. 1 to 3 will be described. The jig 10 has one end of a hollow inner cylinder 12 made of a non-green hard synthetic resin (for example, "NORYL", a registered trademark of GE), which has a length and a hollow part 14 with an inner diameter into which the fixed resistor 2 shown in FIG. 5 can fit. A fixing protrusion 16 for positioning and molding is provided around the diametrical line, and a spacer 18 is provided in the axial direction on the adjacent end surface.

A hollow outer cylinder 20 having a length and a hollow part 22 with an inner diameter into which the hollow inner cylinder 12 can be slidably fitted, and a hollow outer cylinder 20 made of the same material as the inner cylinder 12, around one end on the opposite side to the inner cylinder 12. A fixing protrusion 24 for positioning and molding is provided on the diameter line, and a spacer 26 is provided on the adjacent end surface.
is provided in the axial direction.

``Embodiment Section'' In FIG. 4, a cylinder 12 having a hollow portion 14a is shown.
Fixing protrusions 16a, 16a for positioning and molding are provided around both ends of the jig 10 on the diameter line, and spacers 18a, 18a are provided in the axial direction on both end faces, respectively.
Let it be a.

"Operation" After fitting the fixed resistor 2 into the hollow cylinder 12, the first
As shown in the figure, the fixed resistor 2 is fitted into the hollow outer cylinder 20 to form an integral unit, the power supply wire 4 is connected to the spacer wire 2a of the fixed resistor 2, and these are guided into the lower mold 30, and the upper mold The molds 40 are aligned, and the molding fixing protrusions 16, 24 of the jig 10 and the spacers 18, 26 are engaged with the protrusions of the cavities 32, 42 as shown in FIGS. 6 and 7, or the inner walls of each cavity are The high voltage connector 1 is molded by injecting and hardening molten insulating synthetic resin into these molds.

Furthermore, when molding a high voltage connector using the jig 10a shown in FIG. After connecting these and guiding them into the lower mold 30 and fitting the intermediate mold 50 thereto,
The upper mold 40 is fitted together, and molten insulating synthetic resin is injected into these molds and hardened to form the high voltage connector 1.

"Effect" The jig 10 is connected to the cavities 32, 42 of the upper and lower molds.
However, since positioning and molding protrusions 16 are provided at both ends of the jig 10 or 10a, the cavity 3
Positioning within 2 can be done accurately, and fixing can be done easily and accurately. Further, as described above, the molding fixing protrusions 16, 24 of the jig 10 and the spacers 18, 26 are engaged with the protrusions of the cavities 32, 42,
Alternatively, since it can come into contact with the inner wall of each cavity, the jig can be easily fixed. Furthermore, since spacers 18 and 26 are provided on both end faces of the jig, the heat of soldering is not directly transmitted to the fixed resistor 2, and its resistance value does not change at all.

In addition, even when molded under high pressure, since the resistor 2 is enclosed within the insulating hard synthetic resin jig 10, the molding pressure is not transmitted to the inside and the resistor is not affected at all.

Therefore, the manufacturing process can be shortened and costs can be reduced, and a high voltage connector 1 having a built-in fixed resistor 2 reliably soldered to the power supply wire 4 within the main body can be obtained.

[Brief explanation of drawings]

Fig. 1 is a front view of the high voltage connector molding jig with a built-in fixed resistor according to this invention, Fig. 2 is an exploded front view thereof, Fig. 3 is an exploded perspective view of Fig. 2, and Fig. 4 5 is a front view of a fixed resistor, FIG. 6 is a partially cutaway perspective view of a high voltage connector, and FIG. 7 is a longitudinal section of upper and lower molds. The schematic diagram, FIG. 8, is a partially transparent front view of a fixed resistor covered with a heat-resistant tube. 1...High voltage connector, 2...Fixed resistor, 1
2... Inner cylinder, 14, 24... Positioning and molding protrusion, 18, 26... Spacer, 20... Outer cylinder, 3
0, 40, 50...Mold.

Claims (1)

[Claims for Utility Model Registration] (1) A hollow inner cylinder made of a non-green hard synthetic resin having a fixed protrusion for positioning and molding around one end and a spacer on the adjacent end surface, into which a fixed resistor is fitted. and; It has a fixing protrusion for positioning and molding around one end on the opposite side of the hollow inner cylinder, and a spacer on the end surface adjacent to the protrusion, and is made of a non-greening hard synthetic resin whose other end can be freely fitted into the hollow inner cylinder. For molding a high voltage connector with a built-in fixed resistor, which consists of a hollow outer cylinder; and after fitting the inner cylinder into the outer cylinder, a high voltage electric wire is connected to the fixed resistor and integrally molded inside the connector body. jig. (2) A fixed resistor is fitted into a hollow cylinder made of non-greening hard synthetic resin which has fixed protrusions for positioning and molding around both ends and spacers on each end face, and a high voltage electric wire is connected to the resistor. A jig for molding a high-voltage connector with a built-in fixed resistor as set forth in claim (1) of the utility model registration claim, wherein the connected part is integrally molded within the connector body.