JPH02215070A - Wiring apparatus and manufacture thereof - Google Patents

Abstract

PURPOSE:To improve safety and shock resistance by forming a core block with a charge metal section and a cord connection section, and double-molding its outer face with soft thermoplastic resin with excellent shock resistance. CONSTITUTION:A core block 1 is constituted of a charge metal section 5 and a case 2 covering the charge metal section 5, the case 2 is constituted of a body 3 and a cover 4 covering an opening face on the body 3, and the body 3 and the cover 4 are made of thermosetting resin with excellent heat resistance. The charge metal section 5 is covered by a mold member with excellent heat resistance, thus safety is improved. A shell 19 serving as the outer hull of the core block 1 is made of thermoplastic resin, thus it has excellent shock resistance and a firm structure. The shell 19 is double-molded with a soft material, thus a receptacle cap A can be made a commodity with a soft image.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a wiring device having a plug blade portion and a blade receiving portion.

[Prior Art] Conventionally, in an outlet cap which is a type of adapter and a wiring device that has a plug blade part and a blade receiving part, the live metal part consisting of the plug blade part and the blade receiving part is connected to the body and the cover. It was covered. The body and cover are directly exposed to the outside.

[Problems to be Solved by the Invention] In this conventional example, since the body and cover were formed of thermosetting resin, there was a problem that they were weak against impact.

The present invention has been provided in view of the above-mentioned points, and improves safety and impact resistance, and furthermore,
The present invention provides a wiring device and a method for manufacturing the same with the purpose of improving assembly efficiency.

[Means for Solving the Problems] The present invention provides a charging metal part having a plug blade, a blade receiving spring plate, etc., a case made of a thermosetting resin with excellent heat resistance covering the charging metal part, A core block is formed by the end of the live metal part and the cord connection part that protrudes from the case, and the outer surface of this core block is double molded with a soft thermoplastic resin with excellent impact resistance. It is.

In addition, in claim 2, there is provided a charged metal part having a plug blade, a blade holder spring plate, etc., a case made of a thermosetting resin with excellent heat resistance that covers the charged metal part, and an end from the charged metal part. A core block is formed with a cord connecting part that is formed to protrude from the case, and after forming this core block, the cord is connected to the cord connecting part, and the outer surface of the core block is coated with a soft heat-resistant material with excellent impact resistance. It is double molded with plastic resin.

According to a third aspect of the present invention, the case of the core block is composed of a body and a cover, and the body and the cover are coupled by a concave-convex fit.

Furthermore, in claim 4, a tongue piece is formed from the main part of the terminal plate constituting the charging metal part, a rib is provided opposite to the body of the case consisting of a body and a cover, and the tongue piece is provided between the ribs. It is press-fitted.

In addition, in claim 5, the plug blade of the plug blade portion is provided protrudingly on one surface of the core block, and the plug blade insertion opening of the blade receiving portion is formed on the other surface, and a mold for double-molding the core block. Ring-shaped protrusions are formed on the upper mold and the lower mold to hold the core block by coming into contact with the periphery of the plug blade and the plug blade insertion opening.

[Function] Therefore, in the present invention, a core block is formed by covering the live metal part with a thermosetting resin case having excellent heat resistance, and a core block having excellent impact resistance is coated on the outer surface of the core block. It is double molded with soft thermoplastic resin.

In claim 2, the core block is formed by covering the live metal part with a thermosetting resin case having excellent heat resistance, and the core block is supplied as a block to the next process, and the cord connection part of the core block is A cord is connected to the core block, and the outer surface of the core block is double-molded with soft thermoplastic resin that has excellent impact resistance.

According to a third aspect of the present invention, the body and the cover are connected by concave-convex fitting to facilitate assembly.

Furthermore, in a fourth aspect of the present invention, the terminal plate is fixed to the body by being formed on the body or by press-fitting the tongue piece of the terminal plate constituting the live metal portion between the parts.

In claim 5, the ring-shaped protrusions of the upper mold and the lower mold of the mold are brought into contact with the plug blade of the core block and the periphery of the plug blade insertion opening to hold the core block and perform double molding. That's what I do.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows an exploded perspective view of the core block 1, which includes a live metal part 5 and a case 2 that covers the live metal part 5.
It is composed of etc.

The case 2 is composed of a body 3 and a cover 4 that covers the opening surface of the upper surface of the body 3, and the body 3 and the cover 4 are made of a thermosetting resin with excellent heat resistance. The charging metal part 5 consists of a pair of conductive terminal plates 9. A pair of blade receiving spring plates 10 are integrally formed approximately in the center of each terminal plate 9, and a crimp terminal-shaped cord is attached to one end. A connecting portion 8 is formed and connected to the conductor 11a of the cord 11 by crimping and caulking.

Further, a connecting piece 12 is integrally suspended from the other end of the terminal plate 9, and a protrusion 1 of the plug blade 13 is inserted into the hole 12a of the connecting piece 12.
3a is inserted, and the plug blade 13 is connected and fixed to the connecting piece 12 by welding or the like.

A pair of terminal plates 9 are located in the storage areas 1 on both sides of the partition wall 14 of the body 3.
The blades 13 are inserted into insertion holes 16 drilled in the body 3 and protrude from the surface of the body 3, and the blade receiving spring plate 10 is arranged so as to face the blade insertion opening 17 of the cover 4. It has become. Here, the body 3 and cover 4 are connected by screw 1.
8, the cover 4 abuts the terminal plates 9, and positions and fixes both terminal plates 9. Connect terminal plate 9 to body 3
When it is fixed inside with the cover 4 and the case 2, the cord connection part 8 protrudes outside from the case 2, as shown in FIG.
After forming the core block 1, it is possible to connect it to the cord 11. Further, a plug blade portion 6 consisting of a plug blade 13, an insertion hole 16, etc. is formed on one side of the core block 1, and a blade receiving portion 7 consisting of a blade receiving spring plate 10, a plug blade insertion opening 17, etc. is formed on the other surface.
is formed.

Figures 3 and 4 show the above core block 1 in the shell 19.
The shell 19 is made of a soft thermoplastic resin with excellent impact resistance. In the case of this double molding, as shown in the figure, double molding is performed except for the plug blade part 6 and the blade receiver part 7, and after forming the core block l as described above, After the conductor 11a of the cord 11 is connected to the cord connecting portion 8, it is double molded with thermoplastic resin.

In this way, the case 2 of the core block 1 is made of thermosetting resin, and the live metal part 5 is housed inside the case 2, so that the live metal part 5 is covered with a molded member with excellent heat resistance. I,
Safety is improved, and by molding the shell 19 as the outer shell of the core block 1 from thermoplastic resin, it is possible to have a robust structure with excellent impact resistance.

Furthermore, by covering the shell 19 with a soft material by double molding, the outlet cap A can be made into a product with a soft image.

By the way, as shown in FIG. 4, the part of the core block 1 where the plug blade part 6 and the blade receiving part 7 are formed is an exposed part 20 which is not double molded.
The exposed part 20 on the side of the blade part 6 has a substantially square ring shape, and the exposed part 20 on the side of the blade receiving part 7 has a circular shape. Therefore, when performing double molding, as shown in Figure 5,
A ring-shaped projection 23 is formed on the lower surface of the upper mold 21 of the mold corresponding to the blade receiving part 7, and a ring-shaped projection 24 is formed on the upper surface of the lower mold 22 corresponding to the plug blade part 6. .

When double molding is performed, a protrusion 2 is provided around both exposed portions 20.
3.24, the upper die 21 and the lower die 22 hold the core block 1 from the upper and lower surfaces, thereby performing double molding. Moreover, the molding material does not flow into the plug blade part 6 and the blade receiver part 7 due to the protrusions 23 and 24.

In this way, using the exposed portion 20 of the core block 1,
By holding the core block 1 from above and below with the protrusions 2β and 24 of the upper mold 21 and lower mold 22, the core block 1
It is easy to determine the position of the mold, and it is also easy to divide the mold structure into upper and lower parts, thereby simplifying the mold structure.

In addition, when double molding is performed, the following steps are performed. That is, the outlet 25 is connected to the other end of the cord 11 of the core block 1 (outlet cap A) as shown in FIG. 6, and the outlet 25 and the outlet cap A are molded as shown in FIG. The machine performs double molding. The molding device has a first molding machine 26 and a second molding machine 27 disposed adjacent to each other,
Between the two molding machines 26 and 27, there is a molding section 28 of both of the molding machines 26 and 27.
A connecting rail 29 is provided to connect the second molding machine 2
7 and the supply section 31 of the first molding machine 26.
A return path 32 is provided to connect the two. Outlet 2
5. Holding frame 3 that holds the cord 11 and core block l
3 is returned through the connecting rail 29, the image forming section 28, and the return path 32.

At the supply section 31, connect the outlet 25° cord 1 to the holding frame 33.
1 and the core block 1, the outlet 25 is double molded (secondary molding) in the first molding machine 26, and then transported and the core block 1 is double molded in the second molding machine 27. Thus, an outlet cap A is formed. After double molding, the outlet cap A, the outlet 25, etc. are taken out at the take-out section 30, and the holding frame 33 is sent back to the supply section 31 via the return path 32.

Figures 7 and 8 show other embodiments in which the body 3 and cover 4 can be connected with one touch. That is, a locking hole 34 is formed on both side edges of the body 3, a substantially V-shaped elastic locking piece 35 is formed on both side edges of the cover 4, and the locking piece 35 is attached to the body. The locking holes 34 of No. 3 are locked. The locking piece 35 is shown in Fig. 9.
The state of engagement between the locking hole 34 and the locking hole 34 is shown. Furthermore, body 3
The cover 4 is made of thermoplastic resin to provide elasticity, and the two can be assembled with one touch. Further, as shown in FIG. 10, a protrusion 36 is formed on the body 3, and a locking piece 37 having a locking hole 38 is formed on the cover 4, so that the body 3 on the side to which the charging metal part 5 is mainly fixed is formed. By using a thermosetting resin and using a thermoplastic resin for the cover 4 to impart elasticity to the locking piece 37, fitting between the protrusion 36 and the locking hole 38 can be facilitated. Furthermore, the body 3 that fixes the charging metal part 5 is made of thermosetting resin, which further improves safety performance. FIG. 11 shows a state in which the protrusion 36 and the locking hole 38 are fitted together.

12 to 14 show another embodiment of the method of fixing the terminal plate 9 to the body 3, in which a tongue piece 39 is integrally hung from a position facing the connection piece 12 of the terminal plate 9. On the other hand, a rib 41 is integrally formed on the outer surface of a fixing piece 40 that is integrally formed with the body 3.
Two ribs 42 are provided on the inner surface of the side of the body 3 facing the
are integrally formed. The dimension between the ribs 41 and 42 is formed to be slightly narrower than the thickness of the tongue piece 39, and by press-fitting the tongue piece 39 of the terminal plate 9 between the ribs 41 and 42, the terminal plate 9 can be attached to the body 3. I am trying to fix it.

Therefore, since the press-fitting strength is determined only by the thickness of the tongue piece 39 of the terminal plate 9, variations are reduced. Also, tongue piece 3
9 is simply press-fitted between the ribs 41 and 42,
Easy to press fit.

[Effects of the Invention] As described above, the present invention includes a charged metal part having a plug blade, a blade holder spring plate, etc., a case made of a thermosetting resin with excellent heat resistance wire covering the charged metal part, A core block is formed by the end of the live metal part and the cord connection part that protrudes from the case, and the outer surface of this core block is double molded with a soft thermoplastic resin with excellent impact resistance. Therefore, safety is improved by covering the live metal part with a case made of thermosetting resin with excellent heat resistance, and the outer surface of the core block is made of soft thermoplastic resin with excellent impact resistance. Double molding creates a robust structure with excellent impact resistance, and covering the core block with a soft material gives the product a softer image. It is something to play.

In addition, in claim 2, there is provided a charged metal part having a plug blade, a blade holder spring plate, etc., a case made of a thermosetting resin with excellent heat resistance that covers the charged metal part, and an end from the charged metal part. A core block is formed with a cord connecting part that is formed to protrude from the case, and after forming this core block, the cord is connected to the cord connecting part, and the outer surface of the core block is coated with a soft heat-resistant material with excellent impact resistance. Since double molding is performed using plastic resin, the live metal part is covered with a thermosetting resin case with excellent heat resistance to form a core block, and this core block is supplied as a block to the next process. The cord is connected to the cord connection part of the core block, and the outer surface of the core block is double molded with soft thermoplastic resin with excellent impact resistance. This has the effect of improving assembly efficiency.

In claim 3, the case of the core block is composed of a body and a cover, and the body and the cover are connected by a concave-convex fit, so that the body and the cover can be assembled with one touch by a concave-convex fit. This makes assembly easier.

Furthermore, in claim 4, a tongue piece is formed from the main part of the terminal plate constituting the charging metal part, ribs are provided opposite to the body of the case consisting of a body and a cover, and the tongue piece is press-fitted between the ribs. Therefore, by press-fitting the tongue of the terminal plate that makes up the live metal part between the ribs formed on the body and fixing the terminal plate to the body, the strength of the press-fit is determined by the thickness of the terminal plate, so there is no variation. is smaller, and press-fitting becomes easier, improving assembly efficiency.

In addition, in the claim, a mold for double-molding the core block is provided, in which the plug blade of the plug blade portion is protruded from one side of the core block, and the plug blade insertion opening of the blade receiving portion is formed on the other surface. By forming a ring-shaped protrusion on the upper mold and the lower mold to hold the core block by contacting the periphery of the plug blade and the plug blade insertion opening, the ring-shaped projection of the upper mold and the lower mold is formed. The protrusions are brought into contact with the plug blade of the core block and around the plug blade insertion opening to hold the core block and perform double molding, and the core block is held above and below the mold. This makes it easy to determine the position of the core block and to divide the mold structure into upper and lower parts.
This has the effect of simplifying the mold structure.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a core block according to an embodiment of the present invention;
Fig. 2 is a side view of the same core block, Fig. 3 is a perspective view of the same after double molding, Figs. A cross-sectional view in the case of double molding, FIG. 6 is a diagram showing the process of double molding using the same molding device as above,
Fig. 7 is a perspective view of another embodiment of the above, Fig. 8 is an exploded perspective view of the core block of the above, Fig. 9 is an enlarged sectional view of the main parts showing the fitted state of the above, and Fig. 10 is the same as the above. FIG. 11 is an enlarged sectional view of the essential parts showing the fitted state of the same as above; FIG. 12 is an exploded perspective view of the core block of still another embodiment; FIG. 13 14 is an enlarged perspective view of the main part of the same as the above, and FIG. 14 is an enlarged sectional view of the main part of the same as the above. 1 is the core block, 2 is the case, 3 is the body, 4 is the cover, 5 is the charging metal part, 6 is the plug blade part, 7 is the blade receiver part, 8 is the cord connection part, 9 is the terminal board, 10 is the blade Reception spring plate, 11 is a cord, 13 is a plug blade, 17 is a plug blade insertion opening, 21 is an upper mold, 2
2 is the lower mold, 23.24 is the protrusion, 39 is the tongue piece, 41.42
is a rib. Figure 1 Agent Patent Attorney Stone 1) Chief 7 Figure 9 Figure 10 Figure 11 Figure 8 Figure 12 Figure 13 Figure 14

Claims (5)

[Claims] (1) In a wiring device having a plug blade part and a blade receiving part, a charged metal part having a plug blade and a blade receiving spring plate, etc., and a thermosetting resin with excellent heat resistance covering this charged metal part are used. A core block is formed by the case and the cord connection part whose end from the live metal part is formed to protrude from the case, and the outer surface of this core block is made of a soft thermoplastic resin with excellent impact resistance. A wiring device characterized by heavy molding. (2) In a wiring device having a plug blade part and a blade receiving part, a charged metal part having a plug blade and a blade receiving spring plate, etc., and a thermosetting resin with excellent heat resistance covering this charged metal part are used. A core block is formed by the case and the cord connection part whose end from the live metal part is formed to protrude from the case, and after the formation of this core block, the cord is connected to the cord connection part, and the outer surface of the core block is A manufacturing method for wiring devices that is double-molded with a soft thermoplastic resin that has excellent impact resistance. (3) The wiring device according to claim 1, wherein the case of the core block is composed of a body and a cover, and the body and the cover are connected by concave-convex fitting. (4) A tongue piece is formed from the main part of the terminal plate constituting the charging metal part, ribs are provided opposite to the body of the case consisting of a body and a cover, and the tongue piece is press-fitted between the ribs. The wiring device according to claim 1. (5) A mold for double-molding the core block, with a plug blade protruding from one surface of the core block and a plug blade insertion opening forming the blade receiving portion formed on the other surface. 2. The wiring device according to claim 1, wherein ring-shaped protrusions are formed on the upper mold and the lower mold for holding the core block by coming into contact with the periphery of the plug blade and the plug blade insertion opening.