JPH0562557A - Drawout type circuit breaker - Google Patents

Abstract

PURPOSE:To preclude risk of leaf springs of a terminal connecting device being set off even though each connector swings transversely and generate a sufficient contact pressure by overlapping two leaf springs one over the other, and furnishing a bend in engagement with the side face of the connector on a left side and a right side differing at their one-side ends. CONSTITUTION:A terminal connecting device 3 is composed of an upper and a lower connector 8, a support 6 holding the middle part between them, and a double structural leaf spring whose middle part is held by the support 6 alongside the outer side of the connectors 8 and which energizes them in the direction of holding. The leaf spring consists of a leaf spring member 9 and outer leaf spring member 11 to decrease the stresses, and these members are provided with bent parts 12, 13 at the left and right sides different from each other. Because the bent part 12, 13 sandwich the side faces of the connectors 8 from the sides, the leaf spring members 9, 11 comply with the connectors 8 and will not be set off even though the connectors 8 swing transversely when a large current passes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawer type circuit breaker which comprises a circuit breaker body and a draw-out frame, and which draws out and inserts the circuit breaker body from the draw-out frame.

[0002]

2. Description of the Related Art FIG. 4 is a schematic side view showing a conventional drawer type circuit breaker. In the figure, 1 is a circuit breaker body, 2 is a draw-out frame, and the circuit breaker body 1 is supported so as to be drawn out and inserted. ..
Reference numeral 3 is a terminal connecting device provided on the draw-out frame 2, 4 is a lead-out frame side conductor inserted and connected to one side of the terminal connecting device 3, and 5 is a circuit breaker side conductor projectingly provided on the circuit breaker body 1, It is inserted into the other side of the terminal connecting device 3 when the container body 1 is inserted.

5 to 7 are views showing the terminal connecting device 3 of FIG. 5 is an overall perspective view, FIG. 6 is a plan view showing an inserted state of conductors, and FIG. 7 is a side view of FIG. 6. The same parts as in FIG. In the figure, 6 is a support, which has two holes 6a at the top and two at the bottom. Reference numeral 7 is a support plate for attaching the support 6 to the draw-out frame 2, and 8 is a connector formed by arranging a plurality of (4 in the drawing) contacts in parallel. The upper and lower holes 6a, 6a of the support 6 have intermediate portions respectively. It has a paired structure of the supported upper connector 8a and lower connector 8b. 9 is the upper connector 8
The upper and lower connectors 8a and 8b are urged in the clamping direction by leaf springs whose intermediate portions are supported by the upper and lower holes 6a and 6a of the support 6 so as to follow the outer surfaces of the a and the lower connector 8b. Since both ends of the leaf spring 9 are divided into four parts in accordance with the number of contacts, and the hooks 9a are provided so as not to shift in the longitudinal direction of the connector 8,
The leaf spring 9 does not shift in the longitudinal direction with respect to the connector 8, and a spring biasing force can be applied to each contact individually.

[0004]

In the conventional draw-out circuit breaker as described above, when the connector 8 moves laterally (in the direction of arrow 10 in FIG. 6) when a large current is applied, both end portions of the leaf spring 9 are moved. There is a problem in that a part of the connector comes off the connector 8 and the contact pressure of the connector 8 decreases.

The present invention has been made to solve the above problems, and an object thereof is to obtain a drawer type circuit breaker in which the leaf spring does not come off even when the connector laterally swings and a sufficient contact pressure of the connector can be obtained. And

[0006]

In the drawer type circuit breaker according to the present invention, two leaf springs of the terminal connecting device are stacked, and the left and right side portions of one end of each leaf spring which are different from each other are engaged with the side surface of the connector. The bent portion is provided.

[0007]

In the present invention, since the both side surfaces of the connector are sandwiched from both sides by the two bent portions, the leaf spring follows the lateral deflection of the connector, and the leaf spring does not come off from the connector.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of the terminal connecting device, FIG. 2 is a plan view showing an inserted state of conductors, and FIG. 3 is a side view of FIG. The description is omitted. In the figure, reference numeral 11 denotes an outer leaf spring which is arranged on the outer side of the leaf spring 9 so as to overlap with each other.
It has an intermediate portion supported therein, both ends divided into four, and has a catch portion 11a. Reference numeral 12 is a bent portion protruding from one end of the leaf spring 9, which engages with the side surface of the connector 8. Reference numeral 13 denotes a bent portion projecting from one end of the outer leaf spring 11, which engages with the side surface of the connector 8.

In this way, when the leaf spring 9 and the outer leaf spring 11 are formed into a two-layer structure, and the leaf springs 9 and 11 are provided with bent portions 12 and 13 on different left and right sides, respectively, both bent portions are bent. Since both sides of the connector 8 are sandwiched from both sides by 12 and 13, both leaf springs 9 and 11 follow the connector 8 even if the connector 8 shakes laterally when a large current is applied,
Both leaf springs 9 and 11 will not come off from the connector 8.

In addition, when the leaf springs are of a structure in which two leaf springs are stacked in this manner, the stress acting on the leaf springs 9 and 11 is reduced as compared with the conventional single leaf spring structure.

[0011]

As described above, according to the present invention, there is an effect that the leaf spring does not come off even when the connector laterally shakes and a sufficient contact pressure of the connector can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a terminal connecting device showing an embodiment of the present invention.

FIG. 2 is a plan view showing an inserted state of a conductor.

FIG. 3 is a side view of FIG.

FIG. 4 is a schematic side view showing a conventional drawer type circuit breaker.

5 is a perspective view showing the terminal connecting device of FIG. 4. FIG.

FIG. 6 is a plan view showing an inserted state of a conductor.

FIG. 7 is a side view of FIG.

[Explanation of symbols]

 1 Circuit breaker main body 2 Drawer frame 3 Terminal connection device 4 Drawer frame side conductor 5 Circuit breaker side conductor 6 Support 8 Connector 9 Leaf spring 11 Outer leaf spring 12 Bent part 13 Bent part

Claims (1)

[Claims] 1. A drawer type circuit breaker comprising a circuit breaker main body and a draw-out frame and for withdrawing and inserting the circuit breaker main body from the draw-out frame, the terminal connecting device being supported by the draw-out frame, and this terminal. A lead-out frame side conductor that is inserted into one of the connection devices for connection; and a circuit breaker side conductor that projects from the circuit breaker body and that is inserted into and removed from the other of the terminal connection devices; The device, a pair of upper and lower connectors,
A support for holding the middle part of the connector, and a pair of upper and lower leaf springs that hold the middle part of the support along the outside of the connector and urge the pair of upper and lower connectors in the clamping direction. 2. The draw-out circuit breaker, wherein two leaf springs are stacked, and bent portions that engage with the side surfaces of the connector are provided on different left and right side portions on one end side of each leaf spring.