JPH0629875Y2 - Circuit breaker - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention relates to a circuit or a breaker, in particular, an external conductor connected by a stud or a breaker terminal. Preventing breakage of breaker case.

[Conventional technology]

A conventional circuit breaker or circuit breaker of this type is shown in FIG.
In the figure, (1) is a base of a circuit case and a breaker case, (2) is a cover, and the base (1) is attached to the panel (3).
(4) is a stud connected to a terminal of a circuit breaker or a breaker, and an external conductor (5) is connected to this stud (4). (6) is an insulating bush which is fitted to the stud (4) to insulate the stud (4) from the panel (3). An enlarged sectional view of the portion of the stud (4) is shown in FIG. 6, and the stud (4) and the insulating bush (6) are shown in FIG. Reference numeral (7) is a terminal of a circuit or disconnector, and the stud (4) is connected to the terminal (7) at one end (401) thereof, and penetrates the base (1) and the panel (3) to connect the circuit. It projects to the outside of the disconnector, and the other end (40
The outer conductor (5) is connected to 2). The base (1) is provided with a recess (101) for accommodating the insulating bush (6), and the insulating bush (6) and the base insertion portion (601) accommodated in the recess (101) and And a portion (602) penetrating the panel (3) and protruding to the outside. Reference numeral (403) is a retaining portion of the insulating bush (6) formed on the stud (4).

By the way, when attaching or after attaching the outer conductor (5),
A pressing force is applied to the outer conductor (5) as indicated by (8), or a tensile force is applied as indicated by an arrow (9). Such pressing force is transmitted to the insulating bush (6) through the stud (4), and as shown in FIG. 6 and FIG. 8 showing a cross section taken along line VIII-VIII in FIG. That is, when viewed in the directions of arrows (8) and (9), the outward surface of the recess (101),
That is, the tensile force in the direction of the arrow (9) is received by the circuit (102) facing the circuit breaker and the circuit breaker, and the outer end (603) of the insulating bush (6) is seen in the connecting direction of the outer conductor. ) Is received by the inwardly facing surface (103) of the recess (101).

[Problems to be solved by the invention]

Conventional circuits and circuit breakers are configured as above
The pressing force and the pulling force of (5) are transmitted to the insulating bush (6) through the stud (4) and can be received by the inner surface of the recess (101) of the base (1). Outer conductor
When a force is applied to (5) to push the stud (4) outward, that is, when a force in the direction of the arrow (9) is applied as shown in the above example, this force is applied to the wall of the base (1). Thin part (10
4), the fracture area (10
5) (Fig. 8) is small, and there is a problem that cracks may occur in this portion.

The present invention has been made in order to solve the above problems of the conventional one, and an object thereof is to provide a circuit and a breaker which are not cracked or at least less likely to be cracked than the conventional one.

[Means for solving problems]

In this invention, a protrusion protruding laterally is provided on the outer peripheral surface of the base insertion portion of the insulating bush at a portion inward from the outer end when viewed in the outer conductor connecting direction, and the protrusion is housed to accommodate the outside of the protrusion. The base is provided with a groove having a receiving surface facing the outward surface when viewed in the conductor connecting direction, and a gap is provided between the inward surface of the recess and the outwardly facing outer surface of the insulating bush. It is provided.

[Action]

In this invention, when an external force is applied to the outer conductor toward the outside of the circuit or disconnector, this force is applied to the receiving surface of the groove formed in the base by the protrusion protruding laterally of the insulating stud. Upon contact, it is received by the receiving surface.

[Example of device]

An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an exploded perspective view of a stud and an insulating bush, and FIG. 2 is a sectional view similar to FIG. 8 of the one shown in FIG. The same reference numerals are given to the parts and the description thereof will be omitted. In the figure, reference numeral (604) is formed on the outer peripheral surface of the base insertion portion (601) of the insulating bush (6) so as to project laterally inward from the outer end (603) when viewed in the external conductor connecting direction. The projection (106) is formed on the base (1) and the projection (6)
04) in a groove for accommodating a receiving surface (1) that is in contact with an outwardly facing surface (605) of the projection (604) in the external conductor connection direction.
07). Then, the inward surface (103) of the recess (101) of the base (1) as viewed in the external conductor connecting direction and the outer peripheral surface (60) of the insulating bush (6) facing the inward surface (103).
There is a gap (10) between it and 6).

Thus, when an inward force (in the direction of the arrow (8)) directed to the inside of the circuit or disconnector is applied to the outer conductor (5), this force is applied to the surface of the recess (101) as in the conventional case. There is no problem because it is received by (102) and the back portion of the surface (102) has a large thickness and a large fracture area. On the other hand, when an outward force (in the direction of arrow (9)) applied to the outer conductor (5) toward the outside of the circuit or disconnector is applied, this force is different from the conventional one and the protrusion of the insulating bush (6) It is received by the receiving surface (107) of the groove (106) via (604) and not by the surface (103). Thus, since the receiving surface (107) is located inward of the outer end (603) of the insulating bush (6), the breakage area (105) does not change the basic design of the circuit and the circuit breaker. Larger than conventional base (1)
The thin wall portion (104) is prevented from cracking, or is at least less prone than conventional ones.

Another embodiment of this invention is shown in FIGS. The embodiment of FIG. 3 differs from that of FIG. 2 in that the projection (604) is formed further inward than that of FIG. 2, and the embodiment of FIG. 4 differs from that of FIG. The difference is that the insulating bush (6) is cylindrical.

As will be understood from the above description, the inward, outward, inward, outward directions and the like are based on the circuit breaker and the circuit breaker.

[Effect of device]

As described above, according to the present invention, the outward force applied to the outer conductor is received by the inner portion of the circuit breaker base or the breaker base as compared with the conventional one, so that the breakage area becomes large and the circuit breakage or disconnection occurs. It is possible to prevent cracks from occurring in the container base, or at least to make cracks less likely to occur than conventional ones.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a stud and an insulating bush according to an embodiment of the present invention, and FIG. 2 is a sectional view similar to FIG. 8 of FIG. 1 assembled into a circuit and a breaker. 3 and 4 show a second embodiment of the present invention, respectively.
5 is a side view of a conventional circuit breaker or circuit breaker, FIG. 6 is a cross-sectional view of a stud portion in the conventional circuit breaker or circuit breaker, and FIG. 7 is a stud of FIG. FIG. 8 is an exploded perspective view of the insulating bush, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG. In the figure, (1) is a base, (3) is a panel, (4) is a stud, (5) is an outer conductor, (6) is an insulating bush, (7) is a terminal,
(10) is a gap, (101) is a recess, (103) is an inward surface, (106) is a groove, (107) is a receiving surface, (60)
1) is a base insertion part, (603) is an outer end, (60)
4) is a protrusion, (605) is an outward surface of the protrusion (604), and (606) is an outer peripheral surface of the protrusion. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A stud which penetrates a base of a circuit case or circuit breaker case and a panel to which the base is mounted, and has one end connected to the circuit circuit or circuit breaker terminal and the other end connected to an external conductor, and the stud fitted to the stud. In a circuit or disconnector provided with an insulating bush for insulating the stud from the panel and having a recess for accommodating the insulating bush in the base, an external conductor is connected to an outer peripheral surface of a base insertion portion of the insulating bush. A projection protruding laterally is provided at a portion inward from the outer end when viewed in the direction, and a groove having a receiving surface for accommodating the projection and contacting an outward surface of the projection when viewed in the external conductor connection direction is formed. A circuit or disconnector provided on the base, wherein a gap is provided between an inward surface of the recess and an outwardly facing outer peripheral surface of the insulating bush.