CN2826674Y

CN2826674Y - Movable contact of moulded casing circuit breaker

Info

Publication number: CN2826674Y
Application number: CN 200520074439
Authority: CN
Inventors: 彭祁军; 郭健; 张军科
Original assignee: Legrand Low Voltage Wuxi Co Ltd
Current assignee: Legrand Low Voltage Wuxi Co Ltd
Priority date: 2005-08-07
Filing date: 2005-08-07
Publication date: 2006-10-11
Anticipated expiration: 2015-08-07

Abstract

The utility model relates to a movable contact head of a moulded casing circuit breaker, which comprises a contact head plate and contact head springs at both sides of the contact head plate, wherein both ends of each of the contact head springs are respectively connected to a spring pin and a rotating shaft pin, and the rotating shaft pin is positioned in a clamping groove of the contact head plate. The utility model is characterized in that the end part of a groove wall surface of the clamping groove bends along the centerline direction of the rotating shaft pin to form a convex lip part so as to effectively prevent the rotating shaft pin from sliding out of the clamping groove, avoid the movable contact head from coming off from the rotating shaft and improve the operational reliability of a circuit breaker.

Description

The moving contact of breaker of plastic casing

(1) technical field: the utility model relates to the breaker of plastic casing in the low-tension switch electric appliance, is specifically related to the contact of breaker of plastic casing.

(2) background technology: the moving contact of breaker of plastic casing was welded to connect with soft the connection, see Fig. 1, Fig. 2, moving contact plate 1 is installed on by roller pin 2 and draw-in groove 3 in the rotating shaft of breaker of plastic casing (not drawing among the figure), become the part of contact system, 4 is touch spring among Fig. 1, Fig. 2,5 is spring holder, and 6 is the contact axle.When connect or the big electric current of disjunction, particularly during short circuit current, soft connection is subjected to electrodynamic effect, produce strenuous vibration, the pulling moving contact, because the trough wall surface of draw-in groove 3 is a flat shape, make pivot pin 2 along skidding off on the wall of draw-in groove 3 sometimes, cause moving contact to come off from rotating shaft, whole circuit breaker can't be worked.

(3) summary of the invention: for addressing the above problem, the applicant provides a kind of improved moving contact, during its work, can not come off from rotating shaft.

The technical solution of the utility model is as follows: it comprises a contact plate, device has moving contact axle and spring catch on the contact plate, one end of the touch spring of contact plate both sides is connected to spring catch, the other end is connected to roller pin, the top of contact plate has draw-in groove, described roller pin is installed in the draw-in groove, it is characterized in that the centerline direction bending of described draw-in groove trough wall surface along roller pin; Be further characterized in that of the centerline direction bending of the end of described draw-in groove trough wall surface, constitute a protruding lip along roller pin.

Because the end of draw-in groove wall is to the centerline direction bending of roller pin, even produce strenuous vibration, roller pin also can be stuck in the draw-in groove with being stabilized, prevents that effectively moving contact from coming off from rotating shaft, effectively improves the reliability of circuit breaker disjunction work.

(4) description of drawings: '

Fig. 1 is the front view of existing moving contact plate; Fig. 2 is the stereogram of existing moving contact;

Fig. 3 is the front view of the utility model contact plate; Fig. 4 is a stereogram of the present utility model.

(5) embodiment:

See Fig. 4, the utility model device has moving contact axle 6 and spring catch 5, and an end of the touch spring 4 of contact plate 1 both sides is connected to spring catch 5, and the other end is connected to roller pin 2.See Fig. 3 and Fig. 4, the top of contact plate 1 has draw-in groove 3, contact plate 1 is installed in the rotating shaft of breaker of plastic casing by roller pin 2 and draw-in groove 3, the trough wall surface of draw-in groove 3 is along the centerline direction bending of roller pin 2, this curved wall can be folding face or cambered surface, also can be the combination of folding face and cambered surface as shown in Figure 3.As most preferred embodiment, as shown in Figure 3, Figure 4, the end of the trough wall surface of draw-in groove 3 constitutes a protruding lip 7 along the center line bending of roller pin 2, prevents that so more effectively roller pin 2 from skidding off from draw-in groove 3.

Claims

1, the moving contact of breaker of plastic casing, it comprises a contact plate, device has moving contact axle and spring catch on the contact plate, one end of the touch spring of contact plate both sides is connected to spring catch, the other end is connected to roller pin, the top of contact plate has draw-in groove, and roller pin is installed in the draw-in groove, it is characterized in that the centerline direction bending of described draw-in groove trough wall surface along roller pin.

2, by the moving contact of the described breaker of plastic casing of claim 1, it is characterized in that of the centerline direction bending of the end of described draw-in groove trough wall surface, constitute a protruding lip along roller pin.