JPS6226933Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ground terminal device for electrical equipment such as a buried ground outlet having a built-in earth leakage interrupting mechanism.

2. Description of the Related Art Conventionally, there have been earth terminal devices for electrical equipment such as electrical outlets as shown in FIGS. 1 to 4. That is, an earth terminal plate 4 is mounted on the upper surface of a cover 3 that constitutes the container 1 together with the body 2, and claws 5, 5 provided on both sides of the earth terminal plate 4 are inserted into the cover 3 to form the cover. 3 Holes 6a, 6a of lead plate 6 arranged on the back side
The lead plate 6 and the earth terminal plate 4 are fixed by inserting the lead plate 6 into the ground terminal plate 4 and fixing the lead plate 6 to the earth terminal plate 4. Then, the bottom surface of the tip of the contact spring piece 7, which is bent and extends in a substantially C-shape from the center of one side of the lead plate 6, is placed on the top surface of the ground terminal plate 9 mounted on the ribs 8 of the body 2. The elasticity of the contact spring piece 7 is used to press the contact spring piece 7 into pressure contact with the contact spring piece 7 for electrical connection. In the figure, 10 is a grounding blade receiving spring, 11a,
Reference numeral 11b represents a power terminal portion composed of a locking spring 12, etc., 13 represents an outlet receptacle portion, and 14 represents an earth terminal. This earth terminal 14
is attached to the earth terminal plate 4 by screwing its threaded portion 14a into the screw hole 15 of the earth terminal plate 4.

Now, in the conventional device described above, since the contact spring piece 7 extending laterally in a substantially C-shape is used, a large storage space for the contact spring piece 7 is provided in the third
In addition, since the contact area a between the ground terminal plate 9 and the contact spring piece 7 is on a flat surface as shown in FIG. 4, the sliding of the contact area has a purifying effect. can hardly be expected.

This invention was created in view of the above-mentioned drawbacks.
The purpose of this is to have a structure that allows electrical connection between the grounding terminal plate and the contact spring piece on the grounding terminal side in a small space, and that can also be expected to have the effect of purifying the contact area. To provide earth terminal equipment for equipment.

The present invention will be explained below with reference to embodiment figures. The container body 1 is composed of a body 2 and a cover 3, and a middle frame 16 is fitted inside the body 2 near the opening. and approximately the center of the middle frame 16 and the body 2.
An earth leakage detection mechanism section A including a zero-phase current transformer ZCT, etc. is arranged between the bottom part of the inner frame 16 and blade receiving springs 17, 17 for receiving the plug blades are arranged in parallel on the center part of the middle frame 16. It has been done. Further, power terminal portions 11 are disposed on both sides of the bottom of one end (lower end in the figure) of the body 2, and a ground terminal plate 9 is disposed between the middle frame 16 between the power terminal portions 11 and the bottom of the body 2. This ground terminal board 9
In FIG. 6, the grounding blade receiving spring 10 is attached to the upper horizontal piece 9a, and the extending piece 9c extending from the center of the lower surface of the lower horizontal piece 9b is attached to the middle frame 16 and the body 2.
It is pulled out to the outside by holding it in place. Then, the tip of the upper horizontal piece 9a comes into contact with the rib 8' on the bottom of the body 2, and the tip of the middle horizontal piece 9d fits into the rib 8' on both sides of the body 2, and is fixed between the middle frame 16 and the bottom of the body 2. has been done. Grounding blade retainer spring 1
0 protrudes forward from the opening 16a of the middle frame 16. B is a contact tripping mechanism disposed within the upper end of the body 2, and this contact tripping mechanism B includes an electromagnet 18 that is driven by the detection output of the leakage detection mechanism A, and a trip mechanism that is attracted and driven by the electromagnet 18. 19,
It is comprised of a set mechanism 20 for setting the trip mechanism 19, its set button 21, an opening/closing contact portion S that is opened by the tripping operation of the trip mechanism 19, and the like. The opening/closing contact part S is inserted in series between the blade receiving spring 17 and the power terminal part 11, and cuts off the power to the plug blade (not shown) connected to the blade receiving spring 17 when the blade is opened. There is. On the other hand, the cover 3, which is attached to the opening of the body 2, has an opening 24 in the upper center that allows the set button 21 to protrude forward in the figure, and a plug blade corresponding to the blade receiving spring 17 in the center. insertion holes 22, 22
and a grounding plug blade insertion hole 23 corresponding to the grounding blade receiving spring 10 are provided, and a grounding terminal plate 4 is attached to the side of the lower end to connect the grounding terminal plate 4. An earth terminal 14 is screwed onto the terminal plate 4. As shown in FIG. 9, the earth terminal plate 4 has surrounding walls 4a on both sides projecting upward in the figure, and claws 5 projecting downward at both ends. The claw 5 protrudes from the back side of the cover 3 through a hole 24 provided in the cover 3, and is connected to a lead plate 6 disposed on the back side of the cover 3.
The earth terminal plate 4 and the lead plate 6 are integrally fixed via the cover 3 by inserting the lead plate 6 into the hole 25 of the cover 3. As shown in FIG. 10, the lead plate 6 has an L-shaped contact spring piece 7 arranged in parallel with the lower end in FIG. The free end 7a surface of 7 is used as a contact surface that comes into contact with the ground terminal plate 9.

As described above, the cover 3 is attached to the opening surface of the body 2 in which each member is assembled, and the body 2 and the cover 3 are fixed to each other with fixing screws (not shown). The outlet device is completed. At this time, the free end 7a of the contact spring piece 7 is loosely inserted into the guide hole 26 provided in the middle frame 16 and comes into contact with the surface of the ground terminal plate 6 facing the guide hole 26, as indicated by the broken line in FIG. The end surface of the free end 7a of the contact spring piece 7 is connected to the ground terminal plate 6 from the contact start position shown in FIG.
While applying pressure to the surface, it slides to the position shown by the solid line. Therefore, during sliding, the contact surface of the ground terminal plate 6 is cleaned by the edge of the end face of the free end 7a, and reliable electrical contact between the ground terminal plate 6 and the contact spring piece 7 is achieved. It will be done.

In addition, 27 in Fig. 8 is a neon lamp for display.
Further, 28 is a contact piece extending further along the outer end surface of the cover 3 from the tip of the extension piece 9c, and this contact piece 28 is fitted into the opening of the fitting 29 for attaching the cover 3 to the implantable device. It is joined to the mounting fittings 29 when assembled. Further, numeral 30 in the figure is a fixing screw for fixing the outlet device to the mounting fitting 29.

As described above, the present invention comprises: an earth terminal plate disposed on the surface of a cover that adheres to the opening of the body of an electrical device; a lead plate connected to the earth terminal plate and provided on the back surface of the cover; It comprises an inner frame in which a guide hole is bored, and a ground terminal plate arranged on the back side of the inner frame.
A substantially L-shaped contact spring piece is formed to extend from one side end of the lead plate so as to be arranged in parallel with the lead plate, and when the cover is attached to the body, the free end of this contact spring piece is attached to the middle frame. The contact spring piece is loosely inserted into the guide hole from the front side of the inner frame, and the end surface of the free end of the contact spring piece is pressed and slid against the surface of the inner frame of the ground terminal plate facing the guide hole to make elastic contact. By loosely inserting the free end of the spring piece into the guide hole of the middle frame arranged inside the body from the front side of the middle frame, when the body and cover are attached, the free end of the spring piece can be connected to the ground terminal board. In addition, by bringing the end surface of the free end of the contact spring piece into elastic contact with the surface of the ground terminal plate by pressurizing it, the surface of the ground terminal plate can be brought into contact with the end face of the free end of the contact spring piece. This cleans the surface of the ground terminal board, allowing a reliable connection between the ground terminal board and the lead plate. By forming the letter-shaped contact spring pieces to extend, the storage space can be made smaller than in the conventional case where the contact spring pieces are made to protrude from the lead plate. Another advantage is that it can be made smaller.

[Brief explanation of the drawing]

Figure 1 is a perspective view of an electrical device using the conventional example, Figure 2 is an exploded perspective view of the main parts of the same, Figure 3 is a sectional view of the electrical equipment using the same, and Figure 4 is a part of the same. Fig. 5 is a front view of an electrical device using an embodiment of the present invention, Fig. 6 is a cross-sectional view of the electrical equipment using the same device, and Fig. 7 is a perspective view of the electrical device using the same device. FIG. 8 is a front view of the electric device with the cover removed, FIG. 9 is an exploded perspective view of the same with parts of the same removed, and FIG. 10 is a perspective view of the lead plate of the same. Fig. 11 is an explanatory diagram for use of the same as above, and 2 is a body, 3 is a cover, 4 is a ground terminal plate, 6 is a lead plate, 7 is a contact spring piece, 9 is a ground terminal plate, 7a is a free end, and 16 is a The middle frame 26 is a guide hole.

Claims (1)

[Scope of utility model registration request] A ground terminal plate disposed on the surface of the cover that adheres to the opening of the body of the electrical equipment, a lead plate connected to the ground terminal plate and provided on the back surface of the cover, and a guide hole disposed within the body. It is equipped with a perforated inner frame and a ground terminal plate arranged on the back side of the inner frame, and a substantially L-shaped contact spring piece is arranged from one side end of the lead plate in parallel with the lead plate. When the cover is attached to the body, the free end of this contact spring piece is loosely inserted into the guide hole of the middle frame from the front side of the middle frame, and the end surface of the free end of the contact spring piece is connected to a ground terminal. An earth terminal device for electrical equipment that is made by sliding under pressure and making elastic contact with the surface facing the guide hole of the inner frame of a board.