JPS6030072B2 - Multi-pole connector and its manufacturing method - Google Patents

Description

[Detailed description of the invention]. The present invention relates to a multi-pole connector with improved quality and a manufacturing method with easy manufacturing conditions.

As a conventional multi-pole connector, one end of a sleeve-shaped intermediate body is covered with one end of a base into which connector terminals equal to the number of poles are inserted, and molding resin is injected into the opening □ at the end of the intermediate body to form the intermediate part. Some connectors have a connector main body provided on the outer periphery of the intermediate portion.・However, since the middle part of this multi-pole connector is constructed by injecting molded resin into a mold, the injection pressure and heat during mold injection may cause disconnection at the connection between the terminal and the cord conductor, or the conductor may become disconnected. There is a risk that a short circuit may occur.

As a multi-pin connector to prevent this, for example, Miiso Sho 5
No. 6-15360 (Utility Model Publication No. 57-128783)
As proposed in 2006, a curable resin is sealed from the open end of the connector intermediate body, one end of which is screwed to the rear end outer periphery of the thermoplastic hard resin base that accommodates the connector terminal, and the outer periphery of the rear end of the connector intermediate body is sealed. Some connectors have a thermoplastic sensitive resin connector body over the cord. but,
According to this multi-pole connector, the curable resin is injected from the opening □ of the connector intermediate body through the gap between the cords with a nozzle to form the connector insulator in a no-pressure state. It is difficult for the air inside the body to escape smoothly, so in manufactured multi-pole connectors, even if it appears that hardening resin has been injected up to the edge of the closing part of the connector intermediate body, the resin is completely injected into the connector. It cannot be filled into the intermediate body, and it is injected only into the opening green or only locally within the connector intermediate body, and air bubbles may remain in the injected connector insulator, or the connector intermediate body and connector insulation may be injected. Not only does the adhesion and fixing force of the body decrease, and the function of the connector insulator cannot be fulfilled, but also problems such as the screw engagement between the base and the connector intermediate body become loose, or the injection hardening resin overflows due to air trying to escape. (In addition, air bubbles in the connector insulator and a decrease in the adhesive fixing force will deteriorate the water resistance of the multi-pole connector and also cause disconnection of the connection between the connector terminal and the cord conductor.) .

The present invention has been made in view of the above, and it is possible to completely fill a connector intermediate body with a curable resin, leave no air bubbles in the connector insulator, and seal the screw engagement between the base and the connector intermediate body. To improve the quality by increasing the adhesion and fixing force between the connector intermediate body and the connector insulator, and by eliminating dirt on the cord surface, and to simplify manufacturing conditions so that the injection hardening resin does not overflow near the nozzle. , provides a multi-polar connector in which a resin injection hole is provided in the connector intermediate body, and a curable resin is injected from the injection hole in a nearly pressureless state to allow air to escape from the central entrance. A method for manufacturing a connector is provided.

The multi-pole connector and method of manufacturing the same according to the present invention will be explained in detail below.

Fig. 1 A, A, and Fig. 2 A, A, C show an embodiment of the present invention, in which a flange receiving groove 11 for receiving the flange of a multi-pole plug;
a locking screw part 12 that locks the iron joint with the multi-pole plug;
A thermoplastic resin having an insertion hole 13 for inserting and locking the connector terminal 6, a threaded portion 14 provided on the outer periphery of the rear end, and a guide protrusion 15 provided by cutting a part of the collar receiving groove 11, for example, A base 10 integrally molded in advance from polycarbonate resin, a threaded portion 21 provided on the inner periphery of one end,
A stepped portion 22 provided on the outer periphery of the approximately center, a protrusion 23 provided on the outer periphery of the other end, an open □ portion 24 provided on the other end, and a nozzle (
A thermoplastic resin having a pair of curable resin injection holes 25 having a chamfered nozzle formation portion 26 for application (not shown) and a pair of engagement grooves 27 extending in the axial direction, e.g. A connector intermediate body 20 integrally molded in advance from polybutylene terephthalate resin and a cord core 2 having a cord conductor connected to a connector terminal 6 inserted into an insertion hole 13 and locked therein are connected over a necessary length. A curable resin is filled (sealed) through the exposed cord 1 and the injection hole 25 of the connector intermediate body 20 to fix the cord core (including the connection part) 2, and is provided up to the outer periphery of the sheath end of the cord. A connector molded with thermoplastic resin, for example, vinyl chloride resin, which is provided over a necessary length of the cord from the stepped portion 22 of the connector intermediate body 20, and has a cord protection portion 3. It has a main body 4.

The manufacturing process of the multi-pole connector described above will be explained as follows.

That is, the sheath of the cord 1 is stripped off over a required length to expose the cord core 2, and the insulation of the cord core 2 is stripped off to expose the cord conductor. After the cord conductor and the connector terminal 6 are connected by crimping or soldering, the connector terminal 6 is inserted into the insertion hole 13 of the base 10 and locked.
In this state, attach the base 10 and the connector intermediate body 20 to the threaded part 1.
4 and 21, a nozzle (not shown) is applied to the nozzle competition part 26 of the curable resin injection hole 25 of the connector intermediate body 20, and a thermosetting resin such as epoxy resin is injected. do. Since the injection hole 25 extends to the middle part of the connector intermediate body 20, a small gap and a closing part are formed in which the plurality of cord cores in the connector intermediate body protrude from the end wall of the base 10 while letting the internal air escape from the closing part 24. 24 (of course, the engaging groove 27 of the connector intermediate body is also filled). After the connector insulator 5 is hardened, the connector main body 4 having the cord protection part 3 extending from the step part 22 of the connector intermediate body 20 to the cord 1 is molded with vinyl chloride resin or the like to obtain a multipolar connector. The above embodiments have been explained in relation to multi-pole connectors, but the "multi-pole connector" referred to here refers to the Sanetou Sho 56-1535 needle, which was filed on the same date as the aforementioned Mitsuke Sho 56-1536 No. It should be understood that the invention can be applied to the multi-pole plug proposed here, and also includes it.

As explained below, according to the multi-pole connector and the manufacturing method thereof of the present invention, since the resin injection hole is provided in the connector intermediate body, the thermosetting resin can be completely filled into the connector intermediate body, and the base and connector intermediate body can be completely filled with the thermosetting resin. Improved quality can be achieved by sealing the screw engagement, leaving no air bubbles in the connector insulator, increasing the fixing force between the connector intermediate body and the connector insulator, and eliminating dirt on the cord surface. Since the injection hardening resin does not overflow near the nozzle, manufacturing conditions can be simplified.

[Brief explanation of the drawing]

FIG. 1A is an explanatory view showing an embodiment of the multi-pole connector of the present invention, where A is a cross-sectional view and the opening is a front view. FIGS. 2A, 2B, and 2C are explanatory diagrams showing the connector intermediate body in the present invention, in which A is a side view, the mouth is a front view, and C is an A-A sectional view at the mouth. Explanation of codes, 1...Code,
2... Cord core, 3... Cord protection part, 4... Connector body, 5... Connector insulator, 6...・Connector terminal, 10...
...Base, 11...Brim receiving groove, 12...
Locking screw, 13...Insertion hole, 14...
...Threaded portion, 20...Connector intermediate body, 21...
...Threaded part, 22...Step part, 23...Protrusion, 24...Closing part, 25...Injection hole, 26... Nozzle engagement portion, 27... Engagement groove. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. A terminal connected to a cord conductor, a thermoplastic hard base into which the terminal is inserted and locked and has a threaded portion on the outer periphery of the rear end, and a screw that threadably engages with the threaded portion of the base. a thermoplastic hard resin connector intermediate body having an opening at one end and an opening at the other end to form a space outside thereof from the connecting part of the terminal and the cord conductor to the tip of the cord sheath; and the space of the intermediate body. a curable resin connector insulator sealed in the connector to fix the connecting portion and the cord core, and a thermoplastic soft resin connector body provided from the rear end of the connector intermediate body to the cord and having a protective portion on the cord. A multi-polar connector, characterized in that the connector intermediate body has a connector insulator injection hole extending from the opening to at least a substantially central portion thereof. 2. A connector in which a terminal connected to a cord conductor is inserted into and locked in a thermoplastic hard base, and a space is formed outside of the base from the connecting part of the terminal and the cord conductor to the tip of the cord sheath for encapsulating a connector insulator. A flexible resin connector body is formed by fitting one end of the intermediate body, enclosing a curable resin connector insulator from the other end opening of the connector intermediate body, and extending from the rear end of the connector intermediate body to the cord to form a thermoplastic soft resin connector body. In the method for manufacturing a polar connector, a connector insulator injection hole is formed in the connector intermediate body from the other end opening to at least approximately the center thereof, a connector insulator filling nozzle is applied to the injection hole, and the injection hole is filled with a connector insulator injection hole. A method for manufacturing a multi-polar connector, characterized in that when the connector insulator is sealed through the hole, the connector insulator is sealed while allowing air to escape from the other end opening other than the injection hole.