JPH0828246B2 - Wiring equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention is configured such that mechanical parts such as a blade receiving spring and a switch mechanism are housed in a body, and an opening surface of the body is covered with a cover. It relates to wiring equipment.

[Prior Art] FIG. 5 shows a conventional example, and an outlet is shown as a wiring device in this example. Outlet is body 41 and cover
42 and 42 form an outer shell, and inside the body 41, mechanical parts such as a blade receiving spring are installed. The front surface of the cover 42 is provided with a pair of insertion holes 43 into which the blades are inserted. The cover 42 covers the opening surface of the body 41, and the body 41 and the cover 42
The connection with is performed by a metal assembly frame 44 having a substantially U shape. Grooves 45 are formed on both sides of both ends of the body 41 and the cover 42, and a hanging piece 46 having a forked end of an assembly frame 44 of the groove 45 is fitted to the groove 45, and the end of the hanging piece 46 is engaged. Stopper 47 Groove 45
The body 41 and the cover 42 are joined by the assembly frame 44 by bending and locking (caulking) toward the step portion 48 side of the opening side. The assembly frame 44 is provided with a projection 49 for mounting on an insulating frame buried in a wall surface or the like and a recess 50 for mounting on a metal mounting frame.

[Problems to be Solved by the Invention] In such a conventional example, the body 41 and the cover 42 are fixed by a metal assembly frame 44, but the assembly workability is poor, and if used for a long time in a humid area, the interior will be There is a problem that dew condensation causes the insulation resistance between the metal portion such as the blade receiving spring and the assembly frame 44 to deteriorate.

The present invention is provided in view of the above points,
It is an object of the present invention to provide a wiring device that does not require a metal assembly frame, improves assembly workability, and is free from the risk of electrical leakage or the like even if the internal insulation performance deteriorates.

[Means for Solving the Problems] In the present invention, the body 1 and the cover 2 are formed of an insulating material,
The locking projections 8 are projected on the outer surfaces of the opposing side walls of the body 1, and the locking projections 8 on the body 1 side are projected on the outer surfaces of the cover 2.
A locking piece 12 having a locking hole 13 for connecting the cover 2 to the body 1 is formed in a protruding manner so that the leading end of the locking piece 12 can pass over the starting end of the locking projection 8. An inclined surface 8a having a gradually increasing height is formed, and a retaining surface 8b is formed at the end of the locking projection 8 and is substantially orthogonal to the direction in which the cover 2 is coupled to the body 1.
The cover part corresponding to the mechanical parts housed in the body 1 is formed of thermosetting resin, the locking piece 12 is formed of thermoplastic resin, and the cover 2 is formed of thermosetting resin and thermoplastic resin. It is characterized by being double-molded with a resin.

[Operation] The locking projection 8 is projected on the outer surface of the opposing side wall of the body 1, and the locking projection 8 on the body 1 side is locked on the outer surface of the cover 2 to couple the cover 2 to the body 1. A locking piece 12 having a locking hole 13 is formed to project, and an inclined surface 8a is formed at the starting end of the locking projection 8 so that the height of the locking projection 12 gradually increases as the tip of the locking piece 12 gets over. At the end of the locking projection 8, a retaining surface that is substantially orthogonal to the direction in which the cover 2 is connected to the body 1 is formed.
8b is formed, the locking hole 13 of the locking piece 12 provided on the cover 2 is inserted and locked into the locking protrusion 8 of the body 1, and the body 1
By combining the cover 2 with the cover 2, a metal assembly frame as in the past is not required, the cost of parts is reduced, and the assembly workability is improved. Moreover, the metal parts of the assembly frame are used outside. Therefore, even if the internal insulation performance deteriorates, there is no risk of electrical leakage, and the tip of the locking piece 12 has an inclined surface 8a.
Riding on the ground and deforming the elastic locking piece 12, the locking hole 13
Can be easily locked to the locking projection, and after such locking, the tip edge of the locking hole 13 engages with the retaining surface 8b that is substantially orthogonal to the direction in which the cover 2 is coupled to the body 1. It can be stopped and pulled out securely. Moreover, the locking piece 12 that requires elasticity
Is molded with a thermoplastic resin, and the cover part corresponding to the mechanical parts such as the blade receiving spring is molded with a thermosetting resin, and the locking piece 12 is elastically deformed well, and the cover 2 is easily coupled to the body 1. In addition, it is possible to prevent the deterioration of the insulation performance by making it strong against heat.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.
In FIGS. 1 and 2, the outer shell of an outlet as a wiring device is composed of a body 1 and a cover 2. Mechanical components such as a blade receiving spring 3 are housed in a body 1 formed of an insulating material. Although the wiring device is used as an outlet in this embodiment, it may be a switch or the like. The front surface of the body 1 is opened, and storage recesses 5 for storing mechanical components are formed on both sides of the partition wall 4 at the center. Storage recess 5
Each of the blade receiving springs 3 is installed in the inside thereof, and the blade receiving spring 3 is composed of a pair of spring plates 3a for holding the blades and a contact plate 3b for contacting the conductor of the electric wire from the outside. An elastic locking spring 6 is arranged on the contact plate 3b side, and the body 1
The electric conductor of the electric wire inserted through the electric wire insertion hole formed on the back surface of the above is brought into contact with the contact plate 3b by the locking spring 6 so as to obtain conduction. A release button 7 for releasing the conductor is also arranged in the storage recess 5. Further, four locking projections 8 are integrally provided on both sides of the body 1 so as to project.

The cover 2 that covers the open surface of the body 1 has an open rear surface, and a partition wall 10 is formed in the center. The partition wall 10 is formed at a position facing the partition wall 4 of the body 1, and the partition walls 4 and 10 insulate the left and right blade receiving springs 3. In addition, the front surface of the cover 2 has a pair of insertion holes into which the blades are inserted.
11 is bored, and the insertion hole 11 and the spring plate 3a of the blade receiving spring 3 face each other as shown in FIG. 2 (b). Four locking pieces 12 having elasticity are integrally provided on both sides of the cover 2 so as to project on the back side, and the locking pieces 12 extend in the longitudinal direction of the body 1.
A long hole-like locking hole 13 that is inserted into and locked by the locking projection 8 is provided in a protruding manner. A pair of protrusions 14 and recesses 15 are formed on both sides of the cover 2 for attachment to an insulating frame or a metal mounting frame.

Then, the cover 2 covers the opening side of the body 1, the locking piece 12 is slid to the outer surface of the body 1, and the tip of the locking piece 12 gets over the inclined surface 8a of the locking projection 8, The locking hole 13 is inserted and locked in the locking projection 8, and the body 1 and the cover 2 are firmly coupled. Further, since the locking piece 12 and the locking projection 8 are provided at four positions respectively, the body 1
And the cover 2 can be more firmly coupled. That is, as shown in FIG. 1, a retaining surface 8b that is substantially orthogonal to the direction in which the cover 2 is covered with the body 1 is formed at the end of the locking projection 8, and the locking hole 13 of the locking piece 12 is formed. The front edge of the locking piece 12 is locked, the locking piece 12 is securely prevented from coming off, and a strong connection is achieved.

By the way, the size of this outlet is formed to the size of one standardized wiring device module.
Therefore, the protrusions 14 and the recesses 15 formed on both sides of the cover 2 can be easily and removably attached to the insulating frame, the mounting frame, or the like embedded in the wall surface or the like.

In the cover 2, the cover portion facing the metal portion such as the blade receiving spring 3 and the locking spring 6 in the body 1 is made of thermosetting resin, and only the locking piece 12 is made of thermoplastic resin. The cover 2 is double-molded with a thermosetting resin and a thermoplastic resin. In other words, the portion of the locking piece 12 that is required to have elasticity is formed of thermoplastic resin, and the cover portion corresponding to the filling portion such as the blade receiving spring 3 is formed of thermosetting resin to make it strong against heat. , Prevents deterioration of insulation performance.

FIG. 3 shows another embodiment, in order to reinforce the locking piece 12,
The cover 2 is formed over the entire length in the longitudinal direction, and the locking piece 13 is also formed large in size. The locking projection 8 of the body 1 is also formed to be large in accordance with the size of the locking hole 13. Although four locking pieces 12 are formed in the previous embodiment, the number of locking pieces 12 is two in this embodiment.

FIG. 4 shows still another embodiment, in which the locking pieces 12 are provided on the entire circumference of the back surface of the cover 2 for reinforcing the locking pieces 12. The locking holes 13 may be at two locations on both sides as shown in the figure,
It may be formed at four positions in accordance with the locking projection 8 as shown in FIG.

[Advantages of the Invention] As described above, according to the present invention, the body and the cover are formed of an insulating material, and the locking projections are projected on the outer side surfaces of the side walls of the body facing each other. Since the locking piece having the locking hole for engaging the cover with the body is formed by protruding, the locking hole of the locking piece provided on the cover is formed on the locking projection of the body. By inserting and locking into the body and connecting the body and the cover, unlike the conventional case, a metal assembly frame is not required, the cost of parts is reduced, and the assembly workability is improved. Since the metal parts of the assembly frame are not used, even if the internal insulation performance deteriorates, there is no risk of electrical leakage, and the cover part corresponding to the mechanical parts installed in the body is made of thermosetting resin. Molded, the locking piece is molded with thermoplastic resin, the cover is thermosetting resin and thermoplastic Since it is double-molded with resin, the locking piece that requires elasticity is molded with thermoplastic resin, and the cover part that corresponds to the mechanical parts such as the blade receiving spring is molded with thermosetting resin. The effect is that the stop piece can be elastically deformed favorably and the cover can be easily joined to the body, and the cover can be made strong against heat to prevent deterioration of the insulation performance. In addition, an inclined surface is formed at the starting end of the locking projection, the height of which gradually increases as the tip of the locking piece gets over, and the end of the locking projection is substantially orthogonal to the direction in which the cover is joined to the body. Since the retaining surface is formed, the tip of the locking piece made of thermoplastic resin rides on the inclined surface and the locking hole is transformed into a locking projection by deformation of the elastic locking piece. It can be locked easily, and after such locking, the tip edge of the locking hole is locked to the retaining surface that is substantially orthogonal to the direction in which the cover is joined to the body to ensure retaining. There is an advantage.

Further, since the locking piece and the locking projection are provided at four positions on the cover and the body, respectively, the cover and the body can be firmly coupled.

In addition, the size of the wiring device consisting of the body and cover is equal to the size of one standardized wiring device module, so that it can be easily and detachably attached to the insulating frame or mounting frame embedded in the wall surface. It is possible to

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention, and FIG. 2 (a).
(B) is a plan view and a cutaway front view of the above, FIG. 3 is an exploded perspective view of another embodiment of the above, FIG. 4 is an exploded perspective view of yet another embodiment of the same, and FIG. FIG. 1 is a body, 2 is a cover, 3 is a blade receiving spring, 8 is a locking projection, 8a is an inclined surface, 8b is a retaining surface, 12 is a locking piece, and 13 is a locking hole.

Front page continuation (72) Hideo Hayashi, 1048 Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) Takayuki Iiso, 1048, Kadoma, Kadoma, Osaka, Matsushita Electric Works, Ltd. (56) JP-A-53-124796 (JP, A) JP-A-55-74088 (JP, A) JP-A-55-118844 (JP, A) JP-A-61-104572 (JP, A) Actual development-Sho 54-105891 (JP, U) Actual public Sho 53-44063 (JP, Y2)

Claims (3)

[Claims] 1. A wiring device in which mechanical parts such as a blade receiving spring and a switch mechanism are housed in a body, and an opening surface of the body is covered with a cover. The body and the cover are made of an insulating material. Then, the locking projections are projected on the outer surfaces of the opposite side walls of the body, and the outer surface of the cover has the locking holes for locking the locking projections on the body side to couple the cover to the body. The stop piece is formed so as to project, and a sloped surface is formed at the start end of the locking projection, the height of which gradually increases as the tip of the locking piece gets over, and the cover is attached to the body at the end of the locking projection. A retaining surface is formed that is approximately orthogonal to the connecting direction, and the cover part corresponding to the mechanical parts installed in the body is molded with thermosetting resin, and the locking piece is molded with thermoplastic resin to cover the cover. Wiring device characterized by being double-molded with a thermosetting resin and a thermoplastic resin . 2. The wiring device according to claim 1, wherein the locking piece and the locking projection are provided at four positions on the cover and the body, respectively. 3. The wiring device according to claim 1, wherein the wiring device including a body and a cover has a size of one standardized wiring device module.