TW201917760A - Breaker - Google Patents

Abstract

A breaker (1) includes: a transmission mechanism (30) for moving a movable part (6) with movement of a plunger (23) of an electromagnetic solenoid (20) to change the breaker from a breaking state to a inputting state; and a trip mechanism (50). The plunger (23) reaches a first position where the movement of the plunger (23) is restricted before a toggle mechanism, which is composed of an insulating bar (33) and a lever (32) of the transmission mechanism (30) becomes a dead point. The trip mechanism (50) engages with the transmission mechanism (30) and maintains the inputting state in a state that the plunger (23) has retracted to a second position after it has reached the first position.

Description

   Interrupter   

The present invention relates to a structure of a circuit breaker that allows a movable contact to contact a fixed contact or to move a movable contact away from a fixed contact.

In the past, in a circuit breaker using an electromagnetic solenoid (solenoid) as a switching mechanism, a type has been developed in which a state is maintained by applying a current to the electromagnetic solenoid after the switching is completed Interrupter. However, in a circuit breaker that applies current to an electromagnetic solenoid even when it is turned on, there are problems in that it is not easy to achieve energy saving, and because the coil for turning on the electromagnetic solenoid is continued. The problem of deterioration of the turn-on coil is easily caused by the current.

Therefore, in the circuit breaker described in Patent Document 1, a trip mechanism is used to maintain the on state after completion of the circuit breaker, and the circuit breaker is operated to interrupt the circuit breaker when the circuit breaker is interrupted. Open to release the circuit breaker in the ON state.

    [Prior technical literature]         [Patent Literature]    

Patent Document 1: Japanese Unexamined Patent Publication No. 6-84433

However, in the interrupter described in Patent Document 1, there are many parts that constitute a link mechanism that operates when the interrupter is disconnected. Therefore, because most parts move in association with each other, they show complicated actions, and even if they are used for a long period of time, the parts are damaged or the characteristics of the mechanism change over the years, and the reliability of the interrupter is reduced. possibility.

In addition, the breaker described in Patent Document 1 exhibits a characteristic that the mechanism load rises from the off state to the on state, and the mechanism load is the largest in the on state. Therefore, it is necessary to arrange a plurality of connecting rods to increase the reduction ratio in order to reduce the trip load. In addition, the complicated mechanism for increasing the reduction ratio has a limited income in the configuration area, and the assembly performance will also deteriorate.

The present invention has been developed in view of the above-mentioned problems, and an object thereof is to provide a circuit breaker that can reduce the load on the trip mechanism, and seeks miniaturization and improvement of assemblability of the trip mechanism.

In order to solve the above problems and achieve the object, the interrupter of the present invention is provided with: a housing; a fixed terminal for fixed contact installation and fixation to the housing; and a movable element holder for fixing around the housing. The first axis is connected to the housing in a rotating manner; the movable element is rotatably connected to the movable element holder and a movable contact is installed; the compression spring is connected to the fixed contact when the movable contact is in contact with the movable contact. Apply pressure to the fixed contact and the movable contact; the electromagnetic solenoid has a plunger that moves linearly; the transmission mechanism moves the movable element along with the movement of the plunger, and moves from the movable contact The interrupted state that is disconnected from the fixed contact is changed to the ON state where the movable contact contacts the fixed contact and is energized; and the trip mechanism is engaged with the transmission mechanism to maintain the ON state, and the release and transmission mechanism is released. Engagement will release the hold of the ON state. The transmission mechanism includes a lever that rotates around a second axis fixed to the housing as the plunger moves, and an insulating rod whose one end portion is rotatably connected to one end portion of the rod. And the other end is rotatably connected to the mover. The plunger of the electromagnetic solenoid is the first position where the movement of the plunger is restricted before the toggle mechanism composed of the rod and the insulating rod becomes a dead point. The trip mechanism is engaged with the transmission mechanism to maintain the ON state when the plunger reaches the first position and moves back to the second position.

According to the present invention, the effect that the load on the trip mechanism can be reduced, and the miniaturization of the trip mechanism and improvement in assemblability can be achieved.

1.1A‧‧‧Interrupter

2‧‧‧shell

2a‧‧‧Wall

3‧‧‧Power side terminal

4‧‧‧Load side terminal

5‧‧‧ flexible conductor

5a, 6a, 7a ‧‧‧ one end

5b, 6b, 7b ‧‧‧ the other end

6‧‧‧ mover

7‧‧‧ mover holder

7c, 72c‧‧‧Midway

8‧‧‧Compression spring

9‧‧‧ mover stop

10‧‧‧ fixed contact

11‧‧‧ movable contact

12‧‧‧ holder shaft

12a‧‧‧ holder axis

13, 34, 35, 38‧‧‧ Link pins

20‧‧‧Electromagnetic Solenoid

21‧‧‧Yoke

22‧‧‧ Turn-on coil

23‧‧‧Iron core plunger

24‧‧‧ protrusion

25‧‧‧ Clearance

30‧‧‧ Delivery agency

31‧‧‧ connecting rod

31a, 32a, 33a ‧‧‧ one end

31b, 32b, 33b ‧‧‧ the other end

32‧‧‧ par

33‧‧‧Insulation rod

36‧‧‧ lever axis

37‧‧‧ lever shaft

38b‧‧‧ flat

40‧‧‧ Disconnect spring

50, 70‧‧‧jump mechanism

51‧‧‧ snap pin

52, 71‧‧‧Jump

52a, 54a ‧‧‧ one end

52b, 54b‧‧‧ the other end

52c, 71c ‧‧‧ recess

53, 72‧‧‧1st reset spring

54, 73‧‧‧jump stick

55, 74‧‧‧ 2nd reset spring

56, 77‧‧‧ arc

57, 79‧‧‧ engagement surface

58, 78‧‧‧ Semicircle

58a, 78a‧‧‧arc part

58b, 78b‧‧‧‧ flat

59‧‧‧ Engagement Department

60, 80‧‧‧ Trip shaft axis

61, 81 ‧ ‧ ‧ break off the axis of the stick

71a, 72a, 73a, 73a, 75a

71b, 72b, 73b, 75b ‧‧‧ the other end

75‧‧‧Take off latch

75c‧‧‧Central

76‧‧‧ 3rd reset spring

82‧‧‧Jump off the latch shaft

Fig. 1 is a sectional view showing a configuration example of a circuit breaker according to the first embodiment.

Figure 2 is an enlarged view of the trip mechanism shown in Figure 1.

Fig. 3 is a block diagram showing a blocking state of the interrupter according to the first embodiment.

Figure 4 is an enlarged view of the trip mechanism shown in Figure 3.

Fig. 5 is a configuration diagram showing a state in which the contact of the interrupter of the interrupter in the first embodiment is instantaneous.

Figure 6 is an enlarged view of the trip mechanism shown in Figure 5.

Fig. 7 is a configuration diagram showing a state where the circuit breaker reaches the maximum on position of the interrupter of the first embodiment.

Figure 8 is an enlarged view of the trip mechanism shown in Figure 7.

FIG. 9 is an enlarged view of the trip mechanism after the trip lever is rotated from the state in FIG. 7.

Fig. 10 is a configuration diagram showing a state of reaching the switch-on completion position of the interrupter of the first embodiment.

Fig. 11 is an enlarged view of the trip mechanism shown in Fig. 10.

Fig. 12 is a diagram showing the relationship between the moving position of the iron core plunger and the load applied to the electromagnetic solenoid in the first embodiment.

Fig. 13 is a block diagram showing a blocking state of the interrupter according to the second embodiment.

FIG. 14 is an enlarged view of the trip mechanism shown in FIG. 13.

FIG. 15 is a configuration diagram showing the state of the trip mechanism when the contact point of the interrupter of the second embodiment starts at the moment of contact.

Fig. 16 is a configuration diagram showing the state of the trip mechanism when the state of the maximum on position of the interrupter of the second embodiment is reached.

Fig. 17 is a configuration diagram showing the state of the trip mechanism when the state of the maximum on position of the interrupter of the second embodiment is reached.

Fig. 18 is a configuration diagram showing the state of the trip mechanism when the state of the switch-on completion position of the interrupter of the second embodiment is reached.

Hereinafter, a circuit breaker according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)

The circuit breaker of the first embodiment is an air circuit breaker that opens and closes a circuit such as a low-voltage power distribution line, and detects at least one of an overcurrent and a leakage to block the circuit. In the following, for the convenience of explanation, the positive direction of the Z axis is set to the top, the negative direction of the Z axis is set to the bottom, the positive direction of the X axis is set to the right, the negative direction of the X axis is set to the left, and the positive direction of the Y axis is set to the front and the Y axis. The negative direction is set to the rear. In addition, the following clockwise and counterclockwise directions mean the clockwise direction and the counterclockwise direction in the drawings described later.

Fig. 1 is a diagram showing a configuration example of a circuit breaker according to a first embodiment of the present invention. As shown in FIG. 1, the interrupter 1 according to the first embodiment includes a housing 2 formed of an insulating member, and a power source terminal 3 and a load side terminal 4 that pass through the wall portion 2 a of the housing 2 and are respectively mounted on the housing 2. The case 2 and the flexible conductor 5 have one end portion 5 a connected to the load-side terminal 4 in the inside of the case 2. The interrupter 1 further includes: a movable element 6 having one end portion 6a connected to the other end portion 5b of the flexible conductor 5; and a movable element holder 7 having one end portion 7a inside the housing 2 It is rotatably mounted to the housing 2; and a compression spring 8 is used to mount one end portion and the other end portion to the other end portion 7b of the movable element holder 7 and the other end portion 6b of the movable element 6.

The power-supply-side terminal 3 is connected to a power-supply-side conductor (not shown) outside the housing 2, and the load-side terminal 4 is connected to a load-side conductor (not shown) outside the housing 2. The power-supply-side terminal 3 is electrically connected to a fixed contact 10 in the housing 2, and a movable contact 11 is electrically connected to the other end 6 b of the movable element 6. The power-side terminal 3 and the load-side terminal 4 are fixed away from each other. In the example shown in FIG. 1, although the power supply-side terminal 3 is disposed above the load-side terminal 4, the load-side terminal 4 may be disposed above the power-side terminal 3.

The flexible conductor 5 is a flexible conductor, and one end portion 5 a is connected to the load-side terminal 4, and the other end portion 5 b is connected to the movable element 6. Through this flexible conductor 5, the load-side terminal 4 and the movable element 6 are electrically connected. As described above, the movable contact 11 is electrically connected to the movable element 6, and by bringing the movable contact 11 into contact with the fixed contact 10, the interrupter 1 becomes the power-side terminal 3 and the load-side terminal 4 are electrically connected. And the power-on state. By moving the movable contact 11 away from the fixed contact 10, the interrupter 1 is in a state where the power supply terminal 3 and the load terminal 4 are electrically interrupted.

One end portion 7a of the movable element holder 7 is attached to the housing 2 via the holder shaft 12 so as to be rotatable about the holder shaft center 12a. The intermediate portion 7c of the movable element holder 7 is rotatably attached to one end portion 6a of the movable element 6 via a connecting pin 13. The mover holder 7 is provided with a mover stopper 9.

The mover stopper 9 restricts the angle of rotation of the mover 6 with respect to the mover holder 7 around the connection pin 13. One end portion 6 a of the movable member 6 is in contact with the movable member stopper 9 in a state shown in FIG. 1. Therefore, the rotation of the other end portion 6b of the mover 6 in a direction away from the other end portion 7b of the mover holder 7 is restricted by the mover stopper 9, but the other end portion 6b of the mover 6 can still be directed toward Rotate in a direction approaching the other end portion 7 b of the movable element holder 7.

The compression spring 8 is a spring for crimping the movable contact 11 to the fixed contact 10. The contact spring 8 is stored in a state shorter than the natural length in the state shown in FIG. 1, and is formed into a state having a predetermined initial contact in advance. Therefore, when the other end portion 6b of the mover 6 is rotated in a direction close to the other end portion 7b of the mover holder 7, the distance between the other end portion 6b of the mover 6 and the other end portion 7b of the mover holder 7 is It becomes smaller, and the compression spring 8 is further charged.

In addition, the interrupter 1 further includes an electromagnetic solenoid 20 disposed inside the housing 2 as an on-off actuator of the interrupter 1, and a transmission mechanism 30 that converts the electromagnetic solenoid 20 The driving force is transmitted to the movable element 6, and the movable contact 11 contacts and jumps off the fixed contact 10. The disconnecting spring 40 has one end and the other end mounted on the transmission mechanism 30 and the housing 2; The mechanism 50 maintains the ON state and releases the ON state.

The electromagnetic solenoid 20 includes: a yoke 21 made of a magnetic body; a switching coil 22 is wound around a bobbin (not shown) and is fixed inside the yoke 21; The iron core plunger 23 is linearly reciprocable in the vertical direction; and the protruding portion 24 is formed on the upper part of the iron core plunger 23. A guide (not shown) is provided on at least one of the electromagnetic solenoid 20 and the housing 2 to guide the moving direction of the iron core plunger 23 upward and downward. The plunger 23 can be displaced only in the vertical direction. In addition, the core plunger 23 and the protruding portion 24 may be fixed, regardless of the method of fixing the core plunger 23 and the protruding portion 24.

When the energizing coil 22 is energized, an electromagnetic attractive force is generated in the electromagnetic solenoid 20. Due to this electromagnetic attraction, the iron core plunger 23 moves upward, and the movement of the iron core plunger 23 is restricted when the gap 25 between the iron core plunger 23 and the switching coil 22 disappears. , And the core plunger 23 is physically stopped. In this way, the position where the core plunger 23 stops is the position where the core plunger 23 becomes the uppermost position, and it will be described below as the maximum on position or the maximum moving position. The structure for stopping the core plunger 23 is not limited to the above example. For example, a configuration may be provided in which a protruding portion is provided below the iron core plunger 23 and the iron core plunger 23 is physically stopped by a bobbin or a yoke 21 that is locked to the turn-on coil 22.

After a certain period of time has elapsed after the position of the iron core plunger 23 has reached the maximum ON position, the electromagnetic solenoid 20 stops generating the electromagnetic attraction force by stopping the energization of the ON coil 22. Since the electromagnetic attraction force of the electromagnetic solenoid 20 disappears, the core plunger 23 will force downward from the maximum on position due to the own weight of the core plunger 23 and the breaking force of the break spring 40, for example. Have an effect.

The transmission mechanism 30 includes a connecting link 31, one end portion 31a of which is rotatably connected to the protruding portion 24 of the electromagnetic solenoid 20, and a rod 32 of which is rotatably connected to the other end portion 31b of the connecting link 31. And an insulating rod 33 that is rotatably connected to one end portion 32 a of the rod 32.

One end portion 31 a of the connecting link 31 is rotatably connected to the protruding portion 24 of the electromagnetic solenoid 20 by a connecting pin 34, and the other end portion 31 b of the connecting link 31 is rotatably connected by a connecting pin 35. This way is connected to the rod 32.

The lever 32 is attached to the lever shaft 37 so as to be rotatable about a lever axis 36 that is fixed relative to the housing 2 as an absolute position. The area of the lever 32 closer to the trip mechanism 50 than the lever shaft 37 is connected to the other end portion 31 b of the connecting link 31 by a connecting pin 35. The transmission mechanism 30 of the interrupter 1 further includes an engagement pin 51 that is fixed to the other end portion 32 b of the lever 32.

One end portion 33a of the insulating rod 33 is rotatably connected to one end portion 32a of the rod 32 by a connecting pin 38, and the other end portion 33b is rotatably attached to one end portion 6a of the movable member 6 by a connecting pin 13. . The insulating rod 33 is made of a material having high electrical insulation such as resin. Therefore, when the interrupter 1 is in the energized state, the current flowing between the power-supply-side terminal 3 and the load-side terminal 4 does not leak through the rod 32. In addition, the entire insulating rod 33 does not need to be an insulating material, and as long as the connecting pin 13 and the connecting pin 38 are in an insulated state, a part of the insulating rod 33 may be constituted by a conductor.

The lever 32 and the insulating rod 33 constitute a toggle mechanism in a four-section link with the lever axis 36 and the holder axis 12a as the rotation center. Therefore, the closer to the dead center of the rod axis 36, the connection pin 38, and the connection pin 13, the more linearly the dead point is, the less force can be used to drive the transmission mechanism 30. The protruding portion 24, the connecting link 31, the rod 32, the insulating rod 33, the mover 6 and the mover holder 7 constitute a link structure.

As described above, the disconnection spring 40 is one end portion and the other end portion being mounted on the lever 32 and the housing 2, and the elastic restoring force of the disconnection spring 40 moves the transmission mechanism 30 to a blocking state position described later. Bit direction push.

As described above, the trip mechanism 50 has a function of maintaining the ON state and releasing the ON state. Figure 2 is an enlarged view of the trip mechanism shown in Figure 1. In addition, in FIG. 2, the casing 2 of the interrupter 1 is shown by a dotted line.

As shown in FIG. 2, the trip mechanism 50 includes a trip lever 52 that is engaged with an engagement pin 51 fixed to the other end portion 32 b of the lever 32, and a first reset spring 53 that has one end portion and another One end is attached to the trip lever 52 and the casing 2. In addition, the trip mechanism 50 further includes a trip bar 54 that is rotated by a driving force of an actuator (not shown), and a second reset spring 55 having one end portion and the other end portion attached to the trip bar 54 and the case Body 2.

The engaging pin 51 protrudes from the lever 32 to the right orthogonal to the extending direction of the lever 32. The other end portion 52b of the trip lever 52 is mounted so as to be rotatable around a trip lever axis 60 fixed to the housing 2. One end portion 52a is formed with an engaging pin 51 during the connection process. The arc portion 56 having the arc surface is in contact. Further, a recessed portion 52c is formed in the middle of the trip lever 52 so as to be recessed toward the rear side. The recessed portion 52c is formed with an engagement surface 57 that engages with the engagement pin 51 in the ON state. Furthermore, in the area on the front side of the other end portion 52b of the trip lever 52, an engaging portion 59 engaged with the trip bar 54 is provided.

One end portion 54 a of the trip bar 54 includes a semi-circular semi-circular portion 58 that is attached to the housing 2 so as to be rotatable about the trip bar shaft center 61 and is centered on the trip bar shaft center 61. The semicircular portion 58 is formed by an arc portion 58a having an arc surface and a flat portion 58b having a flat surface.

The driving force of an actuator (not shown) is used to rotate the semi-circular portion 58 about the tripping rod axis 61 and engage the arc portion 58 a of the semi-circular portion 58 on the other end portion 52 b formed on the trip lever 52. The engaging portion 59 restricts the rotation of the one end portion 52a of the trip lever 52 toward the front side.

The second reset spring 55 urges the trip bar 54 toward the other end portion 54 b of the trip bar 54 that faces upward and rotates around the trip bar axis 61 as a center. That is, the second reset spring 55 springs and pushes the trip bar 54 clockwise.

The operation of the interrupter 1 configured as described above will be specifically described. Fig. 3 is a structural diagram showing the interrupted state of the interrupter of the first embodiment, and Fig. 4 is an enlarged view of the trip mechanism shown in Fig. 3. Fig. 5 is a structural diagram showing the state of the contact abutment start of the interrupter of the first embodiment, and Fig. 6 is an enlarged view of the trip mechanism shown in Fig. 5. FIG. 7 is a structural diagram showing a state of reaching the maximum on position of the interrupter of Embodiment 1. FIG. 8 is an enlarged view of the trip mechanism shown in FIG. 7 and FIG. 9 is a trip lever from the first Figure 7 is an enlarged view of the trip mechanism after rotating. Fig. 10 is a structural diagram showing a state where the switch-on completion position of the interrupter of the first embodiment is reached, and Fig. 11 is an enlarged view of the trip mechanism shown in Fig. 10. In addition, in FIGS. 3 to 11, the case 2 is shown by a dotted line.

As shown in FIG. 3, when the interrupter 1 is in the interrupted state, the core plunger 23 constituting the electromagnetic solenoid 20 is physically contacted with the housing 2 by the spring 40 reaching the lowermost portion. It cannot descend any further. At this time, the size of the gap 25 becomes the largest.

In addition, when the core plunger 23 is located at the lowermost portion, the other end portion 32b of the rod 32 is located below the one end portion 32a, and is located at a position facing the one end portion 52a of the trip lever 52 in the left-right direction. In addition, one end portion 52 a of the trip lever 52 is biased rearward by the elastic restoring force of the first reset spring 53. Therefore, the engagement pin 51 attached to the other end portion 32 b of the lever 32 is brought into contact with the arc portion 56 formed at the one end portion 52 a of the trip lever 52.

When the interrupter 1 is in the interrupted state, the other end portion 6b of the movable element 6 rotates toward the movable element 6 in a direction away from the other end portion 7b of the movable element holder 7 (that is, the moving direction of the movable element 6) The rotation in the clockwise direction) is restricted by the mover stopper 9 of the mover holder 7. In addition, as described above, the contact spring 8 has a certain initial contact state in advance, so as long as the reaction force from the fixed contact 10 to the movable contact 11 does not exceed the initial contact, one end of the movable element 6 The portion 6 a is not separated from the movable member stopper 9.

As shown in FIG. 3, when the interrupter 1 is in the interrupted state, the shortest physical distance between the movable contact 11 and the fixed contact 10 of the movable element 6, that is, the jump-off distance becomes the maximum. In the state shown in FIG. 3, as shown in FIG. 4, the flat portion 58b of the semicircular portion 58 in the trip bar 54 is caused by the second reset spring to rotate the trip bar 54 clockwise. The elastic restoring force of 55 contacts the corner portion of the engaging portion 59 formed at the other end portion 52b of the trip lever 52. Therefore, the rotation of the trip lever 52 is restricted, and the state shown in FIG. 4 is maintained.

In addition, one end portion 52a of the trip lever 52 is an elastic restoring force of the first reset spring 53 that rotates the trip lever 52 clockwise so that one end portion 52a of the trip lever 52 faces rearward. The arc portion 56 is in contact with the engaging pin 51 of the rod 32. Thereby, the clockwise rotation of the trip lever 52 is restricted, and the state shown in FIG. 4 is maintained.

When the interrupter 1 is in the interrupted state, when the current is applied to the coil 22 for turning on the electromagnetic solenoid 20, as shown in FIG. 5, the core plunger 23 moves upward. Because the core plunger 23 moves upward, the rod 32 rotates around the rod axis 36, and the connection angle between the rod 32 and the insulating rod 33 becomes smaller. The angle formed by the extending direction of the connecting angle tie rod 32 and the extending direction of the insulating rod 33 decreases as the interrupter 1 changes from the state shown in FIG. 3 to the state shown in FIG. 5.

As the connection angle becomes smaller, the movable element 6 moves forward, and the fixed contact 10 and the movable contact 11 come into contact. The state at the moment when the movable contact 11 and the fixed contact 10 start to abut is a contact abutment start state. At this time, the power-supply-side terminal 3 and the load-side terminal 4 pass through the fixed contact 10, the movable contact 11, and the flexible conductor 5 to be energized.

In addition, as shown in FIGS. 4 and 6, the engaging pin 51 attached to the front end of the lever 32 that can be rotated around the lever axis 36 is maintained at the second weight as the connection angle decreases. In a state where the trip lever 52 which is given elastic restoring force by the spring 55 is in contact, the arc portion 56 formed at one end portion 52 a of the trip lever 52 slides.

The arc portion 56 of the trip lever 52 is formed by an arc with the lever axis 36 of the lever 32 as the center. Therefore, during the period from the state shown in FIG. 4 to the state shown in FIG. 6, even if the engagement pin 51 moves, the position of the trip lever 52 does not change.

When the interrupter 1 reaches the contact abutment starting state, although the movable element 6 is restricted by the movable element stopper 9 provided in the movable element holder 7 to rotate clockwise, the movable element 6 can still be rotated around. Rotate counterclockwise. When the iron core plunger 23 advances further from the contact abutment starting state shown in FIG. 6, the contact reaction force from the fixed contact 10 will be relative to the movable contact attached to the other end portion 6 b of the movable element 6 The point 11 increases, so that the other end portion 6b of the movable element 6 rotates counterclockwise around the connecting pin 13 to approach the other end portion 7b of the movable element holder 7. Therefore, the compression spring 8 is further charged from the state shown in FIG. 5.

As shown in FIG. 7, when the position of the iron core plunger 23 becomes the maximum on position due to the upward movement of the iron core plunger 23, the movable contact 11 is caused by the contact reaction force from the fixed contact 10. The rotation angle of the movable element 6 relative to the movable element holder 7 is maximized, and the stored energy of the compression spring 8 is also maximized.

In addition, when the position of the iron core plunger 23 becomes the maximum on position, as shown in FIG. 8, the engaging pin 51 sliding on the arc portion 56 of the trip lever 52 passes the arc of the trip lever 52. The portion 56 reaches the upper part of the engaging surface 57 of the trip lever 52. Therefore, the engagement pin 51 and the trip lever 52 are instantly brought into a non-contact state.

The trip lever 52 whose rotation around the clockwise direction is restricted by the engagement pin 51 is released when the relationship with the engagement pin 51 changes to a non-contact state. Therefore, as shown in FIG. 9, the recessed portion 52 c of the trip lever 52 is rotated in the clockwise direction by the elastic restoring force of the first reset spring 53 and contacts the engaging pin 51. The engagement pin 51 is in contact with the recessed portion 52 c of the trip lever 52, so that the clockwise rotation of the trip lever 52 is restricted.

In addition, when the engaging pin 51 reaches the upper part of the engaging surface 57 of the trip lever 52 and the trip lever 52 rotates, the clockwise rotation of the trip bar 54 restricted by the trip lever 52 is achieved by The elastic force of the second reset spring 55 is rotated in a clockwise direction, and as shown in FIGS. 8 and 9, the arc portion 58 a of the semi-circular portion 58 is wound above the engaging portion 59 and stopped. The interrupter 1 is provided with a stopper (not shown) that restricts the rotation of the trip bar 54, and restricts the rotation of the trip bar 54 in the state shown in FIGS. 8 and 9.

After the position of the core plunger 23 becomes the maximum on position, the energization of the electromagnetic solenoid 20 is completed. When the energization of the electromagnetic solenoid 20 is completed, the driving of the transmission mechanism 30 by the electromagnetic solenoid 20 is released.

Therefore, the reaction force formed by the stored pressure contact spring 8 will act between the fixed contact 10 and the movable contact 11 to generate the iron plunger 23 of the electromagnetic solenoid 20 through the transmission mechanism 30 Force to push back from the maximum on position to the off position. In addition, due to the own weight of the core plunger 23 and the breaking force of the disconnection spring 40, a force in the direction of moving the core plunger 23 from the maximum on position to the blocked state position also acts simultaneously. As a result, the core plunger 23 starts to move downward from the maximum on position as shown in FIG.

When the iron core plunger 23 moves downward from the maximum ON position, the lever 32 rotates counterclockwise around the lever axis 36 as a center. When the lever 32 rotates counterclockwise, the engaging pin 51 rotates counterclockwise about the lever axis 36 as the center, and as shown in FIGS. 10 and 11, the engagement of the trip lever 52 is engaged. The surface 57 is in a state where the core plunger 23 reaches the on completion position, and the on operation of the interrupter 1 is completed.

Regarding the trip lever 52, when the iron plunger 23 is in the ON completion position, the arc portion 58a of the semi-circular portion 58 is engaged with the flat portion of the engagement portion 59 formed at the other end portion 52b of the trip lever 52. One end 52a of the trip lever 52 is restricted from rotating forward.

Therefore, although the force from the reaction force of the compression spring 8 to rotate counterclockwise with respect to the trip lever shaft center 60 is acted on the trip lever 52 through the engaging pin 51, The release lever 52 will still not rotate as shown in FIG. 11 because of the rotation restriction caused by the arc portion 58 a of the semi-circular portion 58.

As described above, when the interrupter 1 is in the interrupted state, a certain initial contact pressure is given to the contact spring 8 in advance, and the contact pressure of the movable contact 11 with respect to the fixed contact 10 is set from the movable contact. The point 11 becomes stronger the moment it starts to contact the fixed contact 10. Therefore, when the interrupter 1 is energized, it is possible to prevent the occurrence of jumps between the contacts caused by the electromagnetic repulsive force generated between the movable contact 11 and the fixed contact 10, and to accelerate the jumps described below. The speed at which the movable contact 11 and the fixed contact 10 jump off (that is, the disconnection speed) after the release command is issued.

Next, the trip operation in the interrupter 1 will be described. In the case where the interrupter 1 is in the on-completion position shown in FIG. 10, when a trip instruction is given to the interrupter 1 from the outside, the trip bar 54 is set in the interrupter 1. An actuator (not shown) is driven to rotate counterclockwise.

By the counterclockwise rotation of the trip bar 54, the arc portion 58 a of the semicircular portion 58 of the trip bar 54 is separated from the engaging portion 59 of the trip bar 52, and the arc portion 58 a and the engagement are released. The engagement of the portion 59. Therefore, the trip lever 52 will rotate counterclockwise around the trip lever axis 60 as a result of the force from the reaction force of the compression spring 8. The iron plunger 23 will pass through the State and returns to the blocking state position in FIG. 3. Thereby, the tripping of the interrupter 1 is completed.

Here, the relationship between the moving position of the core plunger 23 and the load applied to the electromagnetic solenoid 20 will be described. Fig. 12 is a diagram showing the relationship between the moving position of the iron core plunger and the load applied to the electromagnetic solenoid in the first embodiment. The core plunger 23 moves within a range from the position shown in FIG. 3 to the maximum on position shown in FIG. 7.

Hereinafter, the upward movement of the core plunger 23 will be described as forward, and the downward movement of the core plunger 23 will be described as backward. In addition, the movement position when the iron core plunger 23 advances is described as the forward position, and the movement position when the iron core plunger 23 is retracted is described as the backward position. In addition, the load applied to the electromagnetic solenoid 20 when the core plunger 23 is advanced forward is described as a load when it is forwarded, and the load applied to the electromagnetic solenoid 20 when the core plunger 23 is backward is described as a backward time. load.

As shown in FIG. 12, when the forward position of the iron plunger 23 is the blocked state position from the blocked state position to the contact abutment starting position, the transmission mechanism 30 is in fixed contact with the movable contact 10 The point 11 is driven without being touched. Therefore, when the forward position of the iron core plunger 23 is the blocking state position, the load applied to the electromagnetic solenoid 20 is relatively small. When the forward position of the iron plunger 23 becomes the contact abutment starting position, the contact of the movable contact 11 to the fixed contact 10 is started. Therefore, the rod 32 receives the reaction force from the compression spring 8 and acts as a load torque around the rod axis 36 through the connecting pins 13 and 18 in the counterclockwise direction, and is applied to the electromagnetic solenoid 20. The load will suddenly increase when the load is turned on.

However, when the core plunger 23 advances further, a component perpendicular to the straight line of the connecting rod shaft center 36 and the connecting pin 38 among the reaction forces from the compression spring 8 acting on the connecting pin 38 belonging to the application point That is, it becomes smaller suddenly. Therefore, the load torque in the counterclockwise direction around the lever shaft center 36 starts to decrease. The turn-on load of the electromagnetic solenoid 20 required to rotate the rod 32 also decreases as the load torque decreases.

In the mechanism state of the interrupter 1 in which the core plunger 23 advances further and the forward position becomes the maximum on position after the start operation is started, the rod 32 and the insulating rod 33 are in a state close to a straight line, and The toggle mechanism composed of 32 and insulating rod 33 is closest to the dead point. Therefore, the component of the reaction force acting on the connecting pin 38 from the compression spring 8 that is perpendicular to the line of the connecting rod axis 36 and the connecting pin 38 is close to zero, and the electromagnetic screw required to rotate the rod 32 is close to zero. The turn-on load of the bobbin 20 is also rapidly approaching zero. That is, it is formed into a structure in which a load torque is applied to the lever 32 in order to cope with the turning-on force of the electromagnetic solenoid 20 due to the displacement from the off-state position to the on-state position. The distance traveled by the core plunger 23 of the electromagnetic solenoid 20, that is, the load force acting distance is reduced. Therefore, not only can the electromagnetic attraction force of the electromagnetic solenoid 20 be used for the closing action of the interrupter 1 with good efficiency, but also it can be used in coordination with the change in the distance of the load force required for the closing action of the interrupter 1 The size and size of the electromagnetic solenoid 20 can also be reduced. In addition, in the interrupter 1 of the first embodiment, the core plunger 23 is configured to stop the advancement of the toggle mechanism before the above-mentioned toggle mechanism crosses the dead point, so that it can be avoided when moving from the on state to the interrupted state. The structure of the trip mechanism 50 is complicated without going over the dead point.

In the state after the contacts in the interrupter 1 come into contact, when the contact pressure caused by the reaction force from the contact spring 8 is generated due to the contact between the movable contact 11 and the fixed contact 10, A pressing force in the front-rear direction is generated on the lever shaft 37 through the insulating rod 33 and the lever 32. When the pushing force to the lever shaft 37 is generated, the friction torque to the lever shaft 37 is generated. In addition, there are components in the front and rear directions of the load transmitted to the electromagnetic solenoid 20 through the connecting link 31. The sliding friction load in the up-down direction of the formed electromagnetic solenoid 20 cooperates to become a friction force that cannot be ignored, which increases the on-load of the electromagnetic solenoid 20.

After the core plunger 23 reaches the maximum on position, when the moving direction of the core plunger 23 is changed to the backward direction, the direction of the frictional force applied to the entire transmission mechanism 30 is also changed. Therefore, the load on the trip mechanism 50 in the ON state can be reduced by the effect of reducing the trip load due to friction.

In this way, since the load on the trip mechanism 50 in the on state can be reduced, the configuration of the trip mechanism 50 can be simplified. Therefore, the miniaturization of the trip mechanism 50, the miniaturization of the interrupter 1, and the like can be achieved. In addition, the reliability of the trip mechanism 50 can be improved by reducing the number of parts of the trip mechanism 50.

Until the movable contact 11 comes into contact with the fixed contact 10, frictional force is mainly generated by the rotation of each of the rotation parts of the connection pins 13, 38, the lever shaft 37, and the connection pins 34 and 35. Therefore, until the movable contact 11 contacts the fixed contact 10, the frictional torque with respect to the shaft 37 and the sliding friction load in the up and down direction of the electromagnetic solenoid 20 are caused by the movement from the movable contact 11 to the fixed contact. The state after contact by the contact force of the contact spring 8 after the contact 10 is in contact is still small. Therefore, as shown in Figure 12, the difference between the load applied during forward and backward movement caused by the friction force before the contact is worse than the load difference caused by the friction force caused by the friction after contact Still small.

Regarding a series of turning-on operations and turning on the load of the interrupter 1, the load characteristics required for turning on the electromagnetic solenoid 20 in the interrupter 1 can be formulated. For example, by formulating the load characteristics required for turning on the electromagnetic solenoid 20 in each of the states of FIGS. 3, 5, 7, and 10, the friction of the mechanism can be used to greatly increase the load characteristics. The mechanism load at the time of tripping is reduced, and the design of the interrupter 1 having hysteresis in the turn-on load characteristic of the electromagnetic solenoid 20 is achieved.

As described above, the interrupter 1 according to the first embodiment is provided with: a housing 2; a power-supply-side terminal 3; a mover holder 7; a mover 6; a compression spring 8; an electromagnetic solenoid 20; a transmission mechanism 30; Jump-off mechanism 50. The power-supply-side terminal 3 is an example of a fixed terminal, and the fixed contact 10 is mounted and fixed to the housing 2. The movable element holder 7 is connected to the case 2 so as to be rotatable about a holder axis 12 a fixed to the case 2. The holder shaft center 12a is an example of the first shaft center. The movable element 6 is connected to the movable element holder 7 in a rotatable manner, and a movable contact 11 is installed. The contact spring 8 is configured to apply pressure to the fixed contact 10 and the movable contact 11 when the fixed contact 10 is in contact with the movable contact 11. The electromagnetic solenoid 20 includes a core plunger 23 that moves linearly. The core plunger 23 is an example of a plunger. The transmission mechanism 30 moves the movable element 6 in accordance with the movement of the core plunger 23, and changes from the interrupted state where the movable contact 11 and the fixed contact 10 jump off to the point where the movable contact 11 contacts the fixed contact 10 and is energized. On state. The trip mechanism 50 is engaged with the transmission mechanism 30 to maintain the ON state, and the engagement with the transmission mechanism 30 is released to release the maintenance of the ON state. The transmission mechanism 30 includes a rod 32 and an insulating rod 33. The rod 32 rotates around a rod axis 36 fixed to the housing 2 as the core plunger 23 moves. The lever axis 36 is an example of a second axis. One end portion 33a of the insulating rod 33 is rotatably connected to one end portion 32a of the rod 32, and the other end portion 33b is rotatably connected to the movable member 6. The core plunger 23 of the electromagnetic solenoid 20 is a position where the movement of the core plunger 23 is restricted before the elbow mechanism composed of the rod 32 and the insulating rod 33 becomes a dead point. Therefore, for example, by setting the maximum movement position of the iron plunger 23 to a position just before the toggle mechanism becomes a dead point, the lever 32 can be rotated by utilizing the lever effect achieved by the toggle mechanism. The required turn-on load of the electromagnetic solenoid 20 suddenly approaches zero. Therefore, the load applied to the trip mechanism 50 in the ON state can be reduced. In addition, the above-mentioned position immediately before the dead point is a position that does not reach the dead point even in the case of a manufacturing error. The maximum moving position is an example of the first position. In addition, the tripping mechanism 50 engages with the transmission mechanism 30 in a state where the core plunger 23 has reached the maximum moving position and moved back to the on completion position to maintain the on state. The completed position is an example of the second position. Thereby, when the moving direction of the iron core plunger 23 is changed to the backward direction, the direction of the friction force applied to the entire transmission mechanism 30 is also changed, so the effect of reducing the load from the friction force (i.e. The hysteresis phenomenon of the load characteristics) reduces the load on the trip mechanism 50 in the on state. Therefore, the necessity of making the trip mechanism of the interrupter a complicated mechanism can be reduced, and the miniaturization and assemblability of the trip mechanism 50 can be improved.

The interrupter 1 includes an engagement pin 51 attached to the other end portion 32 b of the lever 32. The engagement pin 51 is an example of an engagement portion. The trip mechanism 50 includes a trip lever 52 and a trip bar 54. The trip lever 52 is rotatably mounted to the housing 2 in a state of being pushed in the direction toward the engaging pin 51, and maintains engagement with the card during the connection process from the blocked state to the connected state. In a state where the engagement pin 51 is in contact with the engagement pin 51 while the core plunger 23 is in the ON completion position, the rotation of the lever 32 about the lever axis 36 is restricted. The trip bar 54 performs the restriction of the rotation of the trip lever 52 and releases the restriction. In this way, the trip mechanism 50 can be constituted by at least two members including the trip lever 52 and the trip bar 54 in addition to the engaging pin 51, so that the miniaturization of the trip mechanism 50 and improvement in assemblability can be achieved. In addition, since the engaging pin 51 is brought into contact with the trip lever 52 from the off state to the on state, it can be easily performed as long as the movable amount of the trip lever 52 in a direction away from the engaging pin 51 is changed. Breakout action.

In addition, the trip lever 52 is provided with an arc portion 56 having an arc shape centered on the lever axis 36, and the engagement pin 51 can be contacted in a movable manner during the connection process; and a recess portion 52c, which is connected to the It engages with the engagement pin 51 in the on state. Thereby, since the position of the trip lever 52 does not change during the switch-on process, it is possible to suppress the switch-on load of the electromagnetic solenoid 20 used to drive the transmission mechanism 30 from being changed by the trip lever 52 during the switch-on process. .

In addition, the trip lever 52 further includes a semi-circular portion 58 formed with a circular arc portion 58 a and a flat portion 58 b and rotating around a trip bar axis 61 fixed to the housing 2. The escape shaft axis 61 is an example of the third axis. The trip lever 52 contacts the flat portion 58 b of the semi-circular portion 58 in the interrupted state to be restricted from rotating, and contacts the arc portion 58 a of the semi-circular portion 58 to restrict rotation in the on-state. Thereby, as long as the trip lever 52 is rotated, the movable amount of the trip lever 52 in a direction away from the engaging pin 51 can be easily adjusted.

(Embodiment 2)

The second embodiment is different from the first embodiment in that a trip latch and a third reset spring are added between the trip lever and the trip stick in the trip mechanism. Hereinafter, the constituent elements having the same functions as those of the first embodiment will be given the same reference numerals and descriptions will be omitted, and the differences from the interrupter 1 of the first embodiment will be mainly described.

FIG. 13 is a structural diagram showing the interruption state of the interrupter of the second embodiment, FIG. 14 is an enlarged view of the trip mechanism shown in FIG. 13, and FIG. 15 is a diagram of the interrupter of the second embodiment. The structural diagram of the state of the trip mechanism at the moment when the contact abuts. 16 and 17 are configuration diagrams showing the state of the trip mechanism when the state of the maximum on position of the circuit breaker of the second embodiment is reached, and FIG. 18 is a diagram showing the connection of the circuit breaker when it reaches the second embodiment. The structure diagram of the state of the trip mechanism when the state of the communication completion position. In addition, in FIGS. 13 to 18, the casing 2 is shown by a dotted line.

As shown in FIG. 13, the interrupter 1A according to the second embodiment includes: a housing 2; a power supply-side terminal 3; a load-side terminal 4; a flexible conductor 5; a mover 6; a mover holder 7; Spring 8; electromagnetic solenoid 20; transmission mechanism 30; disconnect spring 40; and trip mechanism 70.

As shown in FIG. 14, the trip mechanism 70 includes a trip lever 71 that is engaged with an engagement pin 51 that is fixed to the other end portion 32 b of the lever 32, and a first reset spring 72 that has one end portion and The other end is attached to the trip lever 71 and the casing 2. In addition, the trip mechanism 70 further includes a trip bar 73 that is rotated by a driving force of an actuator (not shown), and a second reset spring 74 having one end portion and the other end portion attached to the trip bar 73 and Shell 2. In addition, the trip mechanism 70 further includes a trip latch 75 provided between the trip lever 71 and the trip bar 73; and a third reset spring 76 having one end portion and the other end portion attached to the trip bolt.锁 75 与 壳 2。 The lock 75 and the housing 2.

The trip lever 71 is attached to the housing 2 so as to be rotatable about the trip lever shaft center 80, and an arc 71 is formed at one end 71a of the trip lever 71 to contact the engaging pin 51 during the connection process. Department 77. The other end portion 71 b of the trip lever 71 projects forward and faces the trip latch 75. A recessed portion 71 c recessed toward the rear is formed in the middle of the trip lever 71. An engaging surface 79 that engages with the engaging pin 51 is formed in the recessed portion 71 c. The first reset spring 72 springs and pushes the trip lever 71 counterclockwise around the trip lever axis 80 as a center.

One end portion 73a of the trip bar 73 is mounted on the housing 2 so as to be rotatable about the trip bar shaft center 81, and has a semicircular portion 78 with the trip bar shaft center 81 as the center. The second reset spring 74 springs and pushes the other end portion 73b of the trip bar 73 clockwise about the trip bar shaft center 81 as a center. The trip bar 73 is rotated around the trip bar shaft center 81 by the driving force of an actuator (not shown).

The trip latch 75 is formed in an L-shape when viewed from the side, and the central portion 75c is rotatably attached to the housing 2 around the trip latch axis 82. The third reset spring 76 is configured to spring and push the trip latch 75 counterclockwise around the trip latch axis 82 as a center.

The state of the interrupter 1A shown in FIG. 14 is an interrupted state. In the interrupted state shown in FIG. 14, the trip lever 71 is pushed in the counterclockwise direction by the elastic restoring force of the first reset spring 72. Therefore, the state where the arc portion 77 formed in front of one end portion 71 a of the trip lever 71 is brought into contact with the engagement pin 51 can be maintained.

In addition, the trip latch 75 is pushed counterclockwise by the elastic restoring force of the third reset spring 76, and one end portion 75a of the trip latch 75 contacts the other end portion 71b of the trip lever 71. In addition, the trip bar 73 is elastically pushed by the elastic restoring force of the second reset spring 74, and the other end portion 75b of the trip latch 75 contacts the flat portion 78b of the semicircular portion 78 in the trip bar 73. Therefore, in addition to the first reset spring 72, the trip lever 71 is spring-biased in the counterclockwise direction by the second reset spring 74 and the third reset spring 76.

Next, the state of the contact abutment start instant in the interrupter 1A will be described. The state of the interrupter 1A shown in FIG. 15 is the state at the moment when the contact point abuts. The state shown in FIG. 15 constitutes only the engagement pin 51 rotating from the state shown in FIG. 14 around the lever axis 36 as the shape of the arc portion 77 formed on the trip lever 71. The positional relationship of the trip lever 71, the trip bar 73, and the trip latch 75 of the trip mechanism 70 does not change. In addition, in terms of the shape characteristics of the arc portion 77, although the shape of the arc centered around the lever axis 36 and the arc portion 77 of the trip lever 71 is concentric, the shape may not be circular. arc.

Next, a state where the maximum ON position in the interrupter 1A is reached will be described. In the state shown in FIG. 16, the engagement pin 51 is positioned higher than the arc portion 77 of the trip lever 71, and the contact state between the arc portion 77 of the trip lever 71 and the engagement pin 51 ends. Therefore, the trip lever 71 and the engaging pin 51 instantly become a non-contact state. Since the trip lever 71 is pushed around in the counterclockwise direction, the contact lever 51 is rotated in the counterclockwise direction to contact the engagement pin 51 again after it is in a non-contact state with the engagement pin 51 momentarily.

When the trip lever 71 is rotated counterclockwise from the state shown in FIG. 16, the other end portion 71 b of the trip lever 71 moves backward. Therefore, one end portion 75a of the trip latch 75 that is in contact with the other end portion 71b of the trip lever 71 will move rearward, and the trip latch 75 will rotate counterclockwise around the trip latch axis 82 as the center. Spin. Since the trip latch 75 is pushed counterclockwise by the elastic restoring force of the third reset spring 76, the state where one end 75a of the trip latch 75 contacts the other end 71b of the trip lever 71 can be maintained. .

As shown in FIG. 17, the other end portion 75 b of the trip latch 75 is moved in a direction away from the semi-circular portion 78 formed on the trip bar 73 due to the counter-clockwise rotation of the trip latch 75. Therefore, the contact state with the flat portion 78b of the semicircular portion 78 in the trip bar 73 is released. Therefore, as shown in FIG. 17, the trip bar 73 rotates in a clockwise direction due to the elastic restoring force of the second reset spring 74 and becomes an arc portion formed in the semicircular portion 78 of the trip bar 73. 78 a is opposed to the other end portion 75 b of the trip latch 75 and engages with the other end portion 75 b.

Next, a description will be given of a change from a state where the maximum ON position in the interrupter 1A is reached to a state where the ON completion position is reached. After the core plunger 23 has reached the maximum on position, when the energization of the electromagnetic solenoid 20 is completed, the driving of the transmission mechanism 30 by the electromagnetic solenoid 20 is released, and the movable contact 11 is released from the fixed state. Pressing the contact 10. Therefore, as in the case of the interrupter 1, the reaction force of the compression spring 8 will be applied between the fixed contact 10 and the movable contact 11, and the core plunger 23 will start to reach the maximum value shown in FIG. 17 The ON position moves downward.

When the iron plunger 23 is moved downward from the maximum ON position, the engaging pin 51 is rotated counterclockwise with the lever axis 36 of the lever 32 as the center, and the lever axis 36 is the center. Move counterclockwise. Therefore, as shown in FIG. 18, the engaging pin 51 is engaged with the engaging surface 79 formed in the recessed portion 71c of the trip lever 71, and reaches the ON completion position of the interrupter 1A, and the interrupter is completed. 1A switch-on operation. In the above-mentioned example, although the engagement pin 51 has been described as an example of the engagement portion engaged with the trip lever 52, the engagement portion engaged with the trip lever 52 is not limited to the engagement. The pin 51 may have a shape that can be engaged with the trip lever 52.

As described above, the arc portion 78a of the semi-circular portion 78 in the trip bar 73 is engaged with the other end portion 75b of the trip latch 75 when it becomes the maximum on position, and the circumvention of the trip latch 75 is restricted. Clockwise rotation.

Therefore, although the force from the reaction force of the compression spring 8 is intended to be applied to the trip lever 71 through the engaging pin 51 to rotate counterclockwise relative to the trip lever axis 80, the jump As shown in FIG. 18, the trip lever 71 will still be restricted in rotation by a trip latch 75 that has been restricted from rotating counterclockwise by the arc portion 78a of the semicircular portion 78.

Next, the trip operation in the interrupter 1A will be described. In the case where the interrupter 1A is in the on-completion position shown in FIG. 18, when a trip instruction is given from the outside to the interrupter 1A, the trip bar 73 is set in the interrupter 1A. An actuator (not shown) is driven to rotate counterclockwise.

By the counterclockwise rotation of the trip bar 73, the contact position of the arc portion 78a of the semicircular portion 78 of the trip bar 73 in contact with the trip latch 75 will change from the arc portion 78a of the semicircle portion 78 to The flat portion 78b allows the trip latch 75 to rotate in a clockwise direction. Therefore, the trip lever 71 rotates clockwise with the force from the reaction force of the compression spring 8 centered on the trip lever axis 80, and goes from the interrupted state to the maximum on state. The operation of the previous trip mechanism 70 is reversed, and returns to the interrupted state shown in FIGS. 13 and 14. Thereby, the tripping of the interrupter 1A is completed.

As described above, the trip mechanism 70 of the interrupter 1A of the second embodiment includes the trip lever 71, the trip stick 73, and the trip latch 75. The trip lever 71 is rotatably mounted on the housing 2 in a state of being pushed toward the engaging pin 51, and is maintained in engagement with the card during the connection process from the blocked state to the connected state. When the engaging pin 51 is in contact with the engaging pin 51 in the ON state, the rotation of the lever 32 about the lever axis 36 is restricted. The trip latch 75 is rotatably supported by the casing 2 in the middle, and one end portion 75 a is in contact with the trip lever 71. The trip bar 73 includes a semi-circular portion 78 formed with an arc portion 78 a and a flat portion 78 b, and rotates around a trip latch shaft 82 that is fixed to the housing 2. The trip axis 82 is an example of the third axis. The other end portion 75b of the trip lock 75 is restricted from rotating in contact with the flat portion 78b of the semi-circular portion 78 in the blocked state, and is restricted in rotation by contacting with the arc portion 78a of the semi-circular portion 78 in the closed state. . With this, the trip mechanism 70 can easily adjust the movable amount of the trip lever 71 in a direction away from the engaging pin 51 as long as the trip bar 73 is rotated.

In the interrupters 1 and 1A, the rotation direction of the lever 32 from the interrupted state position to the maximum on position is not limited to the counterclockwise direction around the lever axis 36. The circuit breakers 1 and 1A may be a clockwise mechanism by adding an appropriate link member between the connecting link 31 and the lever 32.

In addition, the interrupters 1 and 1A may not have a configuration in which the engaging pin 51 slides on the arc portions 56 and 77 of the trip levers 52 and 71 centered on the lever axis 36 of the lever 32. That is, in the breakers 1 and 1A, the shapes of the sliding portions of the trip levers 52 and 71 and the engaging pins 51 may not be circular arc shapes.

In addition, although the breakers 1 and 1A stop the rotation of the trip levers 52 and 71 by contacting the trip levers 52 and 71 with the engaging pins 51, they can also be provided by providing trip levers 52 and 71 exclusively. The stopper is rotated and stopped.

In addition, in the above-mentioned Embodiments 1 and 2, although the tripping rods 54 and 73 are rotated in the counterclockwise direction by an actuator (not shown), the tripping rods 54 and 73 may be unillustrated. The linkage or manual mode is operated to rotate counterclockwise.

In addition, in the first and second embodiments described above, although the load-side terminal 4 and the movable contact 11 are electrically connected through the flexible conductor 5, the configuration in which the load-side terminal 4 and the movable contact 11 are connected may be different. Is a flexible conductor 5. For example, the movable element 6 and the connecting pin 13 and the movable element holder 7 may be conductors, and the load-side terminal 4 and the holder axis 12a may be electrically powered by a slip ring or a conductive brush. Composition of sexual connection.

The disconnecting spring 40 may be composed of two or more springs, and the contact spring 8 may be composed of two springs with respect to the movable member 6.

The circuit breakers 1 and 1A have a configuration in which the toggle mechanism composed of the rod 32 and the insulating rod 33 does not reach the dead point, but is not limited to this configuration. The circuit breakers 1 and 1A can also be added with a mechanism that can escape even after the toggle mechanism reaches behind the dead point when the forward position of the iron core plunger 23 becomes the maximum on position (for example, holding the lever shaft center 36 and holding The configuration is such that the switch shaft center 12a is a movable center of rotation), so that the switching mechanism is configured without changing the basic performance of the breakers 1 and 1A.

In addition, although the breakers 1 and 1A are formed so that the core plunger 23 can only be displaced in the up-and-down direction, the moving direction of the core plunger 23 is not limited to the up-down direction, and may be an oblique direction, and the moving direction may also be Change on the way.

The configuration shown in the above embodiment shows an example of the content of the present invention, and may be combined with other known technologies, and a part of the configuration may be omitted or changed without departing from the gist of the present invention.

Claims (5)

    A circuit breaker includes: a housing; a fixed terminal for fixed contacts to be mounted and fixed to the aforementioned housing; and a movable element holder that is rotatable around a first axis fixed to the housing It is connected to the housing; the mover is rotatably connected to the mover holder and has a movable contact; the compression spring is connected to the fixed contact and applies pressure to the movable contact The fixed contact point and the movable contact point; an electromagnetic solenoid having a plunger that moves linearly; a transmission mechanism that moves the movable element along with the movement of the plunger, and moves from the movable contact point to The interrupted state of the fixed contact being tripped is changed to an on state where the movable contact is in contact with the fixed contact and energized; and a trip mechanism is engaged with the transmission mechanism to maintain the on state, and The engagement with the transmission mechanism is released to release the holding of the on state. The transmission mechanism includes a rod that is moved around a second shaft fixed to the housing in accordance with the movement of the plunger. Rotating; and an insulating rod, one end of which is rotatably connected to one end of the rod, and the other end of which is rotatably connected to the movable member; the plunger is connected between the rod and the insulating rod. The elbow mechanism constitutes the first position where the movement of the plunger is restricted before it reaches the dead point; the trip mechanism is in a state where the plunger moves backward after reaching the first position and is located in the second position and communicates with the foregoing. The mechanism engages to maintain the aforementioned ON state.         The interrupter according to item 1 of the scope of the patent application includes an engaging portion mounted on the other end of the rod; the trip mechanism includes: a tripping rod in a direction toward the engaging portion It is rotatably mounted on the housing in the pushed state, and maintains a state of contact with the engaging portion during the switching process from the blocked state to the turned-on state, and the plunger Engaged with the engaging portion in a state in the second position to restrict rotation of the rod around the second axis; and a trip bar, which restricts rotation of the trip rod and releases the restriction.         The interrupter according to item 2 of the scope of patent application, wherein the trip bar is provided with an arc portion having an arc shape centered on the second axis, and is provided for the foregoing during the connection process. The engaging portion is contacted in a movable manner; and the recessed portion is engaged with the engaging portion in the on state.         The interrupter according to item 3 of the scope of patent application, wherein the trip bar is provided with a semi-circular portion, formed with an arc portion and a flat portion, and rotating around a third axis fixed to the casing. ; The trip bar is restricted from rotating while contacting the flat portion of the semicircular portion in the off state, and restricted from rotating by contacting the arcuate portion of the semicircular portion in the on state.         The interrupter according to item 3 of the scope of the patent application, wherein the trip mechanism is provided with a trip latch, and a halfway part is rotatably supported by the casing, and one end portion is connected with the foregoing trip. The trip bar is provided with: a semi-circular portion formed with an arc portion and a flat portion, and rotating around a third axis fixed to the housing; and the other end portion of the trip latch is attached to In the off state, the flat portion of the semicircular portion is contacted to be restricted from rotating, and in the on state, the round portion of the semicircular portion is contacted to be restricted from rotating.