JPS612224A - Breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates in particular to a thin circuit breaker equipped with a trip device.

(Prior Art) Conventionally, in the case of overcurrent circuit breakers and earth leakage circuit breakers that operate a trip device and turn off the contacts when a load abnormality such as overcurrent or electric leakage occurs, the handle is turned off. A contact opening/closing mechanism that operates to turn the contacts on and off and a trip mechanism that detects an abnormality in the load and turns off the contacts when the contacts are on are connected to each other and must be incorporated into the circuit breaker, and Due to problems such as operation, the on/off operation of the contact requires rotating the handle protruding from the surface of the circuit breaker left and right), so the general idea is that the direction of the boosting action of the contact opening/closing trouble mechanism is interrupted. As a result, the shape of the trip mechanism becomes longer in the direction perpendicular to the surface of the base, making it impossible to shorten the height of the circuit breaker. The drawback was that it could not be formalized.

(Objective of the Invention) The present invention provides a circuit breaker in which a contact opening/closing mechanism and a trip mechanism for detecting load abnormality and switching the contact from on to off are formed along the surface of the mounting base, thereby improving the breaking characteristics. To make the external shape of a circuit breaker small, especially thin, while maintaining sufficient space.

(Structure of the Invention) As shown in FIG. 1, the present invention has a handle 3 in which a hooking piece 1 that is displaced when detecting a difference in negative and negative positions is engaged with a contact opening/closing mechanism 2.
The contact 4 is switched from OFF to ON by switching in the on direction, and the contact 4 is disengaged from the engagement piece 1 and the contact m1rl1 by the displacement of the engagement piece 1 in the state C of the contact 4A.
In the circuit breaker 5 that automatically returns the switch from ON to A, the contact opening/closing mechanism 2 is configured such that the ON/OFF direction of the contact 4 is aligned along the 6 faces of the base of the circuit breaker 15 body, and the displacement direction of the hooking piece 1 is The direction of the circuit breaker is perpendicular to the plane of the base 6.

(Structure of an embodiment of the invention) Next, the structure of an embodiment of the invention will be described with reference to FIGS. 2 to 4.

A movable contact 2 that turns on and off faces a fixed contact 22 attached to a synthetic resin base 20 together with an external wiring terminal 21.
3 is mounted on a movable base 25 that can reciprocate along the surface of the base 20 and is biased in the off direction (to the right in FIGS. 2 and 3) by a spring 24, and is fixed to the base 20. The contact points 22, 23A are attached to the fixed frame 26, and the handle 27 for on/off operation is rotated about the shaft 29 in the counterclockwise direction as shown in FIGS. 2 and 3 via the spring 28. If possible, remove the operating part 30 of the handle 27 to the base 20 and protrude from the surface of the synthetic resin product body 31 removed. The second pin 34 attached to the end of the connecting plate 33 connected with the first pin 32 to the
The handle 27 is formed in the handle 26 so that it can reciprocate along the groove 35 substantially along the surface of the IC base 20, and the handle 27 can be moved along the two-dot chain line A in FIG.
When the first pin 32 is rotated from the ON position to the ON position shown by the solid line in FIG.
The hooking piece 3 is attached to the fixed frame 26 so that it can be moved beyond the axis-to-axis center line CL that connects the axis of the pin 34 with a straight line.
6 is attached via a spring 37 so as to be rotatable about a shaft 38 while biased clockwise in FIGS. 2 and 3, and the movable contact 2
With one end fixed to 3, the other end including any intermediate position is connected to the external wiring terminal 40 of the base 20 through the lead wire 39. An adjustment screw 42 is installed to adjust the current setting accordingly.

Further, the movable base 25 is attached to the second pin 34 of the connecting plate 33.
When the handle 27 is rotated from the A) position to the ON position, one end of the lip arm 44 engages with the stepped portion 43 of the engaging piece 36. The first end of the connecting plate 33 engages with the stepped portion 43 formed at the top of the connecting plate 33, and the other end engages with the movable base 25 in the ON direction of the contact 22.23. The pin 32 is aligned with the center line C between the axes.
The trip arm 44 is mounted so as to be capable of troubleshooting over and over again, and to disengage the stepped portion 43 of the engaging piece 36 from the trip arm 44 as the engaging piece 36 rotates due to the operation of the bimetal 41.

(Effect of Example) Next, the operation of this embodiment will be explained.

It was constructed in this way; J3 is connected to the breaker 4;
5 is the protrusion 1 on the base 20 due to the biasing force of the spring 24! I
6 and 18, the contacts 22 and 23 are held in the OFF state.

Next, in this state, the operating portion 30 of the handle 27 is rotated from the OFF position to the ON position by one foot against the biasing force of the spring 28. : Then, the arc 1 of the first pin 32. As the second pin 34 moves along the vortex 35 of the fixed frame 26, one end of the trip arm 44 is engaged with the stepped part 43 of the hooking piece 36, and the other end is engaged with the movable base 25. , the movable contact 23 contacts the fixed contact LU, and in this press-contact state, the first pin 32 crosses the center line CL between the axes of the 1'-rub operation and contacts the stopper side 47 formed in the fixed room 26. Then, when the bimetal 41 is thermally deformed due to overcurrent flowing through the load circuit with this contact gt22.23 in the on state, the engaging piece 36
Rotate counterclockwise in FIGS. 2 and 3 against the biasing force of the spring 37! Stepped portion 43 of hooking piece 36
The engagement with the trip arm 44 is released, and the handle 2
7 is returned from the on position to the off position by the biasing force of the spring 28, and the movable contact 23 is moved together with the movable base 25 in the contact OFF direction (FIG. 2) by the force of the spring 24.

3), and the movable contact 2 is held at the contact OFF position where the movable base 25 is in contact with the protrusion 46.

On the other hand, when the clap bowl 30 is rotated from the on position to the off position with the contacts 22 and 23 in the on state, the first bin 32 returns beyond the center line CL- between the axes and the 1~guru operation is canceled. The movable contact 23 moves together with the movable base 25 in the contact-off direction by the biasing force of the spring 24, and when the movable base 25 comes into contact with the protrusion 46, the off state of the movable contact 23 is maintained.

As shown in FIG. 5, the engaging piece 52 is actively rotated by the operation of the electromagnetic device 51 via an amplifier (not shown) by the output from the zero-phase current transformer 50 whose primary coil is the load circuit. When the circuit breaker 53 is used to detect ground fault current, 1 means 1-
It is also possible to avoid the lip, and as shown in Figure 6 =j, J:
However, when the bimetal overcurrent detection device 61 and the ground fault current detection device 62 such as a zero-phase current transformer are installed in the left and right positions of the disconnector 60, the circuit breaker 60 has a small size. (Effects of the Invention) The present invention is based on a trip mechanism that detects abnormalities in the contact state and load and switches the contact to ON or A. Forming the base surface 7i> in the IJ direction has the effect that the breaking characteristics can be sufficiently divided into 11'fr, and the external shape of the circuit breaker in the IC state can be made smaller, especially the i9 type. .

[Brief explanation of drawings]

Figure 1 is a block diagram showing the overall structure of the present invention, Figures 2 and 3 are
The figure is a cutaway front view of one embodiment of the present invention, FIG. 4 is a plan view thereof, FIG. 5 is a front view of another embodiment of the present invention, and FIG. 6 is a plan view of another embodiment of the present invention. It is. 1... Latching piece 2... RJN geometry between contacts 3... Pan 1-Ru 4... Contact 5... Circuit breaker 6... Base

Claims (1)

[Claims] The latch piece that is displaced when an abnormality in the load is detected engages with the contact opening/closing mechanism and switches the contact from off to on by switching the handle in the on direction, and the latch piece and the contact opening/closing mechanism are changed by the displacement of the latch piece when the contact is in the on state. In a circuit breaker that automatically returns a contact from on to off when the contact is disengaged, the contact on/off direction by the contact opening/closing mechanism is along the base surface of the circuit breaker body, and the displacement direction of the engaging piece is along the base surface. A circuit breaker characterized by a right angle direction.