JPH09213192A - Cover for circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover for a circuit breaker in which the number of part items is reduced, assembly man-hour is little, and there is no possibility of fitting oblivion of an auxiliary cover by an user. SOLUTION: A main body cover portion 51 and an auxiliary cover portion are integrally molded in a state where both are combined by a thin thickness portion 522 using a flexible resin. At that time, a recessed portion 551 is provide in an adjoining portion of the auxiliary cover portion of the main cover portion 51 for fixing the auxiliary cover portion in a closed state, and a protrusion portion 521 which is inserted into the recessed portion 511 for fixing the auxiliary cover portion is provided on the opposite side of the thin thickness portion 522 of the auxiliary cover portion. Thereby, the thin thickness portion 522 acts as a hinge so that the auxiliary cover portion can be opened and closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover for a circuit breaker.

[0002]

2. Description of the Related Art A circuit breaker has a main body cover and an accessory cover. The accessory cover is used to protect accessories such as auxiliary contacts and alarm contacts. It can be opened and closed. The conventional accessory cover has a structure as shown in FIGS. 5 to 7, and is a separate component separate from the main body cover.
In FIG. 5, the accessory cover 4 is attached to the main body cover 3 by the shaft pin 41. In the one shown in FIG.
The accessory cover 4 is fixed to the body cover 3 with screws 42. The one shown in FIG. 7 has a body cover 3 and an accessory cover 4
It is an example of a fitting type accessory cover for fitting and fixing.

[0003]

As described above, since the conventional accessory cover is a separate component separated from the main body cover, the number of components is large and the number of assembling steps is also high. Further, in the case of FIG. 5, since the shaft pin is used, its shape becomes complicated. In the case of FIG. 6 and FIG. 7, since the accessory cover is completely removed and used, there is a problem that the user forgets to attach it.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cover for a circuit breaker which has a small number of parts, does not require assembling steps, has a simple structure, and does not cause the user to forget to attach the auxiliary cover. is there.

[0005]

In order to solve the above-mentioned problems, in the present invention, the main body cover and the accessory cover are completely integrated through a flexible hinge portion made of the same material. There is. Specifically, the cover is made of flexible resin, the accessory cover is connected and integrated with the main body cover by the thin part, and the accessory cover part is fixed to the adjacent part of the main body cover part in the closed state. A concave portion is provided for this purpose, and a protrusion for inserting the concave portion into the concave portion and fixing the accessory cover portion is provided on the opposite side of the thin portion of the accessory cover portion.

Since a flexible resin is used as the cover material, the thin portion which is the connecting portion between the accessory cover portion and the main body cover portion functions as a hinge (hinge), and this portion is used as a fulcrum for 180 degrees. By rotating and inserting the protrusion of the accessory cover into the recess of the main body cover, the accessory cover is fixed, covering the accessory and protecting the accessory.

[0007]

1 and 2 are overall views of a circuit breaker showing an embodiment (integrated cover 5 in the figure) of a cover of a circuit breaker according to the present invention, and FIG. 1 is a front view. ,
FIG. 2 is a plan view seen from below. FIG. 3 is a perspective view of an embodiment of the cover of the circuit breaker according to the present invention, in which one accessory cover part is shown in a closed state and the other accessory cover part is shown in an open state. Further, an enlarged view of the portion A in FIG. 3 is shown in FIG.

The main body 1 is covered with an integrated cover 5 made of a flexible resin, polycarbonate, by an injection molding method. The integrated cover 5 includes a main body cover portion 51 and an accessory cover portion 52, and the accessory cover portion 52 covers the accessory 2. The accessory cover part 52 is connected to the main body cover part 51 by a thin part 522 having a rectangular cross section, which acts as a hinge, and a protrusion part 521 is provided on the opposite side of the accessory cover part 52 from the thin part 522. ing. When a force in the direction of the arrow is applied to the accessory cover 52O in the open state, the thin portion 522 is deformed, and when the deformation reaches 180 degrees, the accessory cover
52 is ready to cover the accessory. In order to maintain this state, the protrusion 521 is inserted into and fixed in the recess 511 provided in the main body cover 51, and becomes the state of the accessory cover 52S 1 in the closed state in FIG. When the thickness of the thin portion 522 is set to 1/3 to 1/20 of the thickness of the other portion, the thin portion 522 acts as a hinge and the other portions are hardly deformed.

Although polycarbonate is used as the material for the cover of the circuit breaker in the above-mentioned embodiment, in addition,
Any material that can withstand repeated bending in actual use, including flexible resins such as polyimide, polyacetal, polyethylene, polypropylene, vinyl chloride and nylon, can be used as the cover material for the circuit breaker of the present invention. .

[0010]

Embodiments Another embodiment of the present invention is shown in FIGS. 4 (B) and 4 (C). In the above-described embodiment, the thin-walled portion 522 has a rectangular cross-sectional shape. (B) is a case where one side has a curved surface, and (C) is a case where both sides have a curved surface. By making it a curved surface, the part that deforms is limited to the thinnest part,
The shape after deformation tends to be constant.

[0011]

According to the present invention, the main body cover and the accessory cover are completely integrated via the flexible hinge portion made of the same material, and are attached to the portion adjacent to the accessory cover portion of the main body cover portion. A recess for fixing the product cover in the closed state is provided, and a protrusion for inserting the recess to fix the accessory cover is provided on the side of the accessory cover opposite to the hinge.

By doing so, the accessory cover portion and the main body cover portion are integrated into one simple component,
The number of parts is reduced, the time required for assembly is shortened, the user does not have to worry about forgetting to attach the accessory cover, and the reliability of the product is improved.

[Brief description of drawings]

FIG. 1 is a front view of a circuit breaker showing an embodiment of a cover for a circuit breaker according to the present invention.

FIG. 2 is a plan view of the circuit breaker as seen from below showing an embodiment of the cover of the circuit breaker according to the present invention.

FIG. 3 is a perspective view showing an embodiment of the cover of the circuit breaker according to the present invention.

FIG. 4 is an enlarged perspective view showing three embodiments of a thin portion (A portion in FIG. 3) of the cover of the circuit breaker according to the present invention.

FIG. 5 is an overall view showing a cover of a conventional circuit breaker.

FIG. 6 is a second general view showing a cover of a conventional circuit breaker.

FIG. 7 is a third general view showing a cover of a conventional circuit breaker.

[Explanation of symbols]

 1 Main body 2 Accessories 3 Main body cover 4 Accessory cover 41 Axis pin 42 Screw 5 Integrated cover 51 Main body cover 511 Concave 52 Accessory cover 521 Protrusion 522 Thin part 52O Open accessory cover 52S Closed Accessory cover

Claims (3)

[Claims] 1. A circuit breaker having an accessory cover that can be opened and closed independently of the main body cover, wherein the main body cover and the accessory cover are completely integrated via a flexible hinge portion made of the same material. A cover for a circuit breaker characterized by the following. 2. The cover of the circuit breaker according to claim 1, wherein the cover is made of flexible resin, and the accessory cover is integrally formed by being connected to the main body cover by a thin portion serving as a hinge portion. A cover for a circuit breaker, which is characterized in that 3. The cover of the circuit breaker according to claim 1 or 2, wherein a recess for fixing the accessory cover in a closed state is provided in a portion of the main body cover adjacent to the accessory cover. A cover for a circuit breaker, wherein a protrusion for inserting the accessory cover and fixing the accessory cover is provided on a side of the accessory cover opposite to a hinge portion.