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Breaker

A circuit breaker and connecting rod technology, which is applied in the direction of electromagnetic release switch, protection switch operation/release mechanism, etc., can solve the problems of increasing the external size of the box, and achieve the effect of suppressing the expansion of accidents and easy miniaturization

Inactive Publication Date: 2005-09-21
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to this configuration, in the case, a space is required for extending the upper link and the lower link, thereby increasing the outer dimension of the case

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0038] figure 1 as well as figure 2 shows the circuit breaker 100 in Embodiment 1 for carrying out the present invention, figure 1 It is a front view showing the whole circuit breaker, figure 2 It is a perspective view enlargedly showing the opening and closing mechanism part which is the main part of this invention. in addition, figure 1 The drawings as circuit breakers are usually described as side views. In this embodiment, from the relationship with other drawings, the figure 1 The drawing of is illustrated as a front view.

[0039] exist figure 1 Among them, the base 1 and the cover 2 constitute the box of the circuit breaker and are formed of synthetic resin materials. The opening and closing mechanism part 3 is arranged inside the box, and a handle 12 to be described later protrudes from the handle window 2 a of the cover 2 to the surface of the cover 2 . The opening and closing joint part 4 is generally comprised by what is called a bridge type two-contac...

Embodiment approach 2

[0065] In the above configuration, the arcuate sliding groove 11b formed in the frame 11 is arcuately inclined in the direction in which the main spring 19 extends as the handle 12 is turned from opening to closing. This is to generate an elastic force to return the handle to the original open or closed position when the handle is not operated, or when the hand is left during operation. In this case, the arc shape of the sliding groove 11b may be a simple arc, if Figure 18 A more desirable motion can be obtained with a special arc shape as shown. That is, in the slide groove 11b, the arc S on the lower side is, as shown in the figure, an arc shape formed by two kinds of radius dimensions R-1 and R-2, and the two kinds of radius dimensions R-1 and R-2 The substantially middle position of the slide groove 11b is taken as an inflection point, and the center of the radius is taken as a position beyond the above-mentioned inflection point in the vicinity of the lower spring pin 3...

Embodiment approach 3

[0068] In addition, in the above-mentioned structure, it demonstrated that the engaging hole 12a of the handle 12 is a long hole or an open groove. However, when the engaging hole 12a is a simple long hole or a simple open groove, when the handle 12 is turned from open to closed, the upper side spring pin 32 is pushed toward the arc-shaped sliding groove 11b of the frame 11. The pressing force increases, and it is difficult to obtain smooth rotation of the handle 12 . Therefore, become Figure 19 The engagement hole 12a of such a shape. That is, when the handle 12 is opened, the engaging hole 12a has a shape including the pressing portion 12c that presses the upper spring pin 32 along the direction of the shape of the slide groove 11b. In this embodiment, for example, as Figure 19 As shown, in the engaging hole 12 a , the pushing direction is set to be about 27 degrees upward from a line perpendicular to the center line connecting the handle 12 and the upper spring pin 32 ...

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Abstract

This invention provided a miniaturized circuit breaker capable of improving an operation and the like of a switching mechanism part when a fixed contact is welded to a moving contact or in tripping. This circuit breaker is so structured that an on-state is obtained with a lower link 15 and an upper link 14 folded so as to position the other end of the lower link 15 in the middle part between one end and the other end of the upper link 14. The circuit breaker is so structured that, when the fixed contact 21a is welded to the moving contact 22a, a handle 12 is engaged with a forcible engagement part 13d of a connection link 13 to prevent the handle 12 from rotating to the off-position; an opening projection 16d is formed on a lever 16; a projecting contact part 13f in contact with the opening projection 16d is formed on the connection link 13; and the opening projection 16d comes into contact with the projecting contact part 13f of the connection link 13 in tripping start to assist the startup of the connection link 13.

Description

technical field [0001] The present invention relates to a circuit breaker such as a wiring circuit breaker or an earth leakage circuit breaker, and specifically provides a novel mechanism for reducing the size and thickness of a switch mechanism. Background technique [0002] In the opening and closing mechanism part of the circuit breaker with a conventional fold-down handle, the upper link and the lower link are almost in a straight line at the time of opening in order to ensure the contact pressure of the contacts. Constituted flip link mechanism. (For example, refer to Patent Document 1). [0003] In addition, as a specific example, a structure in which a contact pressure is ensured by a contact spring and an auxiliary spring is used at the time of separation is known without using an overturning link mechanism. (For example, refer to Patent Document 2). [0004] [Patent Document 1] Patent No. 3166908 ( Figure 6 ) [0005] [Patent Document 2] JP-A-2001-250465 ( im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/12H01H73/38
Inventor 渡边和昌高桥进
Owner MITSUBISHI ELECTRIC CORP