JPH0757608A - Terminal cover device for electric equipment - Google Patents

Abstract

PURPOSE:To prevent protrusion of a terminal cover exceeding a width of a main body of electric equipment. CONSTITUTION:A terminal cover 7 is installed on a case 3 of electric equipment by engaging protruding parts 7f provided at leg members 7d of the terminal cover 7 with recessed parts 3b is case side walls 3a formed standing on both sides of a terminal part of the electric equipment from the inner side. The leg members 7d are on the inside of the case side walls 3a, and they are folded inward in attaching or detaching the terminal cover 7, so no space over the width of the electric equipment is not required for containing the terminal cover 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover device for covering a terminal portion of electric equipment such as a circuit breaker.

[0002]

2. Description of the Related Art As a cover device of this type, Japanese Patent Laid-Open No.
There is one described in Japanese Patent No. 165472. this is,
A U-shaped terminal cover having side pieces on both sides was inserted into a terminal block of an electric device from above, and at least one of the side pieces was fitted on the side surface of the terminal block by a concave-convex portion to be mounted. It is a thing.

[0003]

However, since the side piece of the terminal cover sandwiches the terminal block from the outside in this cover device, the width dimension when the terminal cover is attached is equal to that of the side piece. In addition to being larger than the main body, there is a problem in that a space larger than the width dimension of the terminal cover must be secured in order to bend the side piece portion outward when the terminal cover is attached and detached. On the other hand, when the fitting of the uneven portion is made shallow in order to reduce the installation space, there arises a problem that the attachment strength of the terminal cover is weakened. Therefore, an object of the present invention is to provide a terminal portion cover device for an electric device in which the installation space is reduced so that the terminal cover does not extend beyond the width of the electric device.

[0004]

SUMMARY OF THE INVENTION According to the present invention, side walls are integrally formed with a case on both sides of a terminal portion and a terminal cover for covering the upper surface of the terminal portion is provided, and the terminal cover is provided with leg pieces on both sides thereof. The above object is achieved by fitting the convex portion provided via the concave portion provided in the inner wall surface of the side wall and mounting the convex portion through the case. In the above terminal cover device, guide grooves are provided on the inner wall surface of the side wall of the case along the insertion direction of the terminal cover, guide pieces to be inserted into the guide grooves are provided on both sides of the terminal cover, and the front end of the terminal cover is provided. If the tongue piece that elastically abuts on the front surface of the case is provided in the portion, the terminal cover can be easily attached to the case and can be securely held after the attachment. Further, in this case, the shape of the terminal cover can be simplified by forming a convex portion on the guide piece of the terminal cover and forming a concave portion into which the convex portion fits in the guide groove of the side wall of the case.

[0005]

[Operation] By forming recesses on the inner wall surfaces of the side walls raised on both sides of the terminal portion and fitting the projections provided on both sides of the terminal cover via the leg pieces into the recesses, the terminal cover is provided with the width of the case. The leg pieces that are accommodated inside and have a convex portion are bent inward when the terminal cover is attached and detached, so that the terminal cover does not come out of the main body of the electric device. A guide groove is provided on the inner wall surface of the side wall of the case along the insertion direction of the terminal cover, guide pieces to be inserted into the guide groove are provided on both sides of the terminal cover, and the front end of the terminal cover is elastically attached to the front of the case. If the tongue that abuts on the terminal is provided, the convex portion of the terminal cover is guided to the concave portion of the case by simply pushing the guide piece into the guide groove, and it is easy to attach the terminal cover. Since it is pressed against one side of the guide groove, there is no play when mounting the terminal cover. In that case, if a convex portion is formed on the leg piece of the terminal cover and a concave portion into which the convex portion fits is formed in the guide groove on the side wall of the case, the leg piece and the guide piece can be integrated. The shape of the cover becomes simple.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention in a single-pole circuit breaker will be described below with reference to FIGS. Embodiment 1 FIGS. 1 and 2 show Embodiment 1, FIG. 1 is an exploded perspective view showing a terminal portion of an electric device and a terminal cover attached to this portion, and FIG. 2 is a terminal cover for the terminal portion of FIG. It is a longitudinal cross-sectional view of a state in which is mounted. In the illustrated electric device (single-pole circuit breaker), a case body 1 and a cover 2 made of mold resin
A terminal portion composed of a terminal plate 4 and a terminal screw 6 screwed to the terminal plate 4 via a washer 5 is provided on the outer side of the halved case 3 composed of and side walls 3a are integrally formed with the case 3 on both sides thereof. It is formed by launching. Although the terminal portions are provided before and after the case 3, only one of them is shown in the figure.

On the other hand, the terminal cover 7, which is also made of molding resin, has a shape in which side covers 7b are formed on both sides of the front side of the cover body 7a for covering the upper surface of the terminal portion. The tongue piece 7c is formed so as to project obliquely downward. Further, strip-shaped leg pieces 7d and guide pieces 7e are integrally formed on both sides of the cover body 7a so as to project vertically downward from the lower surface thereof.
A cylindrical convex portion 7f is provided at the tip of the leg piece 7d.
A concave portion 3b into which the convex portion 7f is fitted is provided on the inner wall surface of the side wall 3a, and a guide groove 3c into which the guide piece 7e is inserted along the insertion direction of the terminal cover 7 is provided. The width dimensions of the outer surfaces of the terminal cover 7 and the case are the same.

To mount the terminal cover 7 on the case 3 of the circuit breaker as shown in FIG. 2, the tongue piece 7c is pressed against the front surface 3d of the case 3 and the tip of the guide piece 7e is guided to the guide groove 3b.
Push in elastically according to the entrance of. The convex portion 7f is the leg piece 7
While d is deflected inward, the d is inserted, and then the d falls into the concave portion 3b to be fitted. In the illustrated configuration, the leg piece 7d provided with the convex portion 7f is inside the side wall 3a, and since the leg piece 7d bends inward when the terminal cover 7 is attached or detached, the terminal cover 7 is placed within the width of the case 3. It does not take up a place to fit. Further, the terminal cover 7 is inserted into the case 3 while being guided by the guide groove 3c through the guide piece 7e, and the convex portion 7f is surely guided and fitted into the concave portion 3b, so that the terminal cover 7 is easily mounted. Further, as can be seen from FIG. 2, after the mounting, the terminal cover 7
Since the guide piece 7e is pressed against one side of the guide groove 3c (right side in FIG. 2) by the elastic force of the tongue piece 7c, there is no play between the case 3 and the guide piece 7e does not fall off easily.

Embodiment 2 FIGS. 3 and 4 show Embodiment 2 and correspond to FIGS. 1 and 2 of Embodiment 1, respectively. The second embodiment differs from the first embodiment in that in this case, a rectangular guide piece 7e is used.
This is that a claw-shaped convex portion 7f is integrally formed on the upper side, and a concave portion 3b into which the convex portion 7f fits is provided inside a rectangular guide groove 3c into which the guide piece 7e is inserted. Other configurations are the same as those in the first embodiment. In this configuration, the same effect as that of the first embodiment is obtained, and the leg piece 7d that supports the convex portion 7f is obtained.
Since (Example 1) is also used as the guide piece 7e, the shape of the terminal cover 7 can be simplified and the molding cost can be reduced accordingly.

[0010]

According to the present invention, the recesses are provided on the inner wall surfaces of the case side walls raised on both sides of the terminal portion, and the projections provided on both sides of the terminal cover through the leg pieces are fitted into the recesses. As a result, the terminal cover fits within the width of the case, and the installation space for electrical equipment is reduced. Further, a guide groove is provided on the inner wall surface of the side wall of the case along the insertion direction of the terminal cover, guide pieces to be inserted into the guide groove are provided on both sides of the terminal cover, and the front end of the terminal cover is provided on the front surface of the case. By providing the tongue that elastically abuts, the convex part of the terminal cover is surely guided to the concave part of the case, and the terminal cover can be easily attached, and the elastic force of the tongue presses the guide part against one side of the guide groove. As a result, the terminal cover is held firmly. In that case, if a convex portion is formed on the leg of the terminal cover and a concave portion into which the convex portion fits is formed in the guide groove on the side wall of the case, the shape of the terminal cover is simplified and the molding cost thereof is reduced. It will be cheaper.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a terminal portion and a terminal cover showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a state where a terminal cover is attached to the terminal portion of FIG.

FIG. 3 is an exploded perspective view of a terminal portion and a terminal cover showing another embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing a state in which a terminal cover is attached to the terminal portion of FIG.

[Explanation of symbols]

 1 Case body 2 Cover 3 Case 3a Side wall 3b Recess 3c Guide groove 4 Terminal plate 5 Terminal screw 7 Terminal cover 7c Tongue 7d Leg 7e Guide 7f Convex

Claims (3)

[Claims] 1. A terminal cover device for covering a terminal portion provided on the outer side of a case of an electric device, wherein side walls are formed integrally with the case on both sides of the terminal portion, and terminal covers for covering the upper surface of the terminal portion are provided. A terminal cover device for an electric device, characterized in that the terminal cover is mounted on the case by fitting convex portions provided on both sides of the terminal cover via leg pieces into concave portions provided on an inner wall surface of the side wall. 2. A guide groove is provided on an inner wall surface of a side wall of the case along an inserting direction of the terminal cover, guide pieces to be inserted into the guide groove are provided on both sides of the terminal cover, and a front end portion of the terminal cover is provided. The terminal cover device for an electric device according to claim 1, further comprising: a tongue piece that elastically abuts on a front surface of the case. 3. A terminal for an electric device according to claim 2, wherein a convex portion is formed on the guide piece of the terminal cover, and a concave portion into which the convex portion fits is formed in a guide groove of a side wall of the case. Cover device.