CN112768314A

CN112768314A - Trigger switch and current conversion circuit breaker

Info

Publication number: CN112768314A
Application number: CN202110198972.6A
Authority: CN
Inventors: 杨红艺; 陈思磊; 汪倩; 李兴文; 葛世伟; 高平; 李晓蒙
Original assignee: Xian University of Technology; Xian Jiaotong University; Zhejiang Tengen Electric Co Ltd
Current assignee: Xian University of Technology; Xian Jiaotong University; Zhejiang Tengen Electric Co Ltd
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2021-05-07

Abstract

The invention discloses a trigger switch and a commutation breaker, wherein the trigger switch comprises a rotating arm, a touch plate and a driving arm; the rotating arm is made of conductive materials, one end of the rotating arm is a rotating end which is rotatably arranged with a fulcrum, and the other end of the rotating arm is a contact end which is used for being in contact with the touch panel; the contact plate is made of conductive materials and provided with a section of contact area used for being in contact with the contact end, and the contact area is arranged in a rotating track of the contact end; the driving arm is connected with the rotating arm and is driven by external force to cause the rotating arm to rotate; the contact end enters from one end of the contact area and moves out from the other end in the rotating process; the contact area of the contact area for contacting with the contact end is A, the contact area of the contact end is B, and A is larger than B; the invention has the effect that the trigger switch is contacted firstly under the continuous action of the same external force and is separated after being contacted for a period of time.

Description

Trigger switch and current conversion circuit breaker

Technical Field

The invention relates to a trigger switch, in particular to a trigger switch and a commutation breaker.

Background

In a traditional trigger switch, a point contact between two contacts is adopted to complete an action, for example, when the trigger switch is influenced by an external force, a movable contact is in contact with a fixed contact to realize electric connection, so that signal feedback is realized.

The trigger switch structure can not complete the action that the movable contact and the static contact are firstly triggered and then separated after a certain time under the continuous action of the same external force.

For example, CN111799752A discloses a hybrid switch, because this type of switch needs a trigger switch that can be closed first and then opened after a certain time by an external force in the same direction.

Disclosure of Invention

The invention mainly aims to provide a trigger switch and a commutation breaker which can be triggered and then disconnected under the action of a continuous external force.

In order to achieve the above object, the present invention provides a trigger switch, which includes a rotation arm, a touch panel, and a driving arm;

the rotating arm is made of conductive materials, one end of the rotating arm is a rotating end which is rotatably arranged with a fulcrum, and the other end of the rotating arm is a contact end which is used for being in contact with the touch panel;

the contact plate is made of conductive materials and provided with a section of contact area used for being in contact with the contact end, and the contact area is arranged in a rotating track of the contact end;

the driving arm is connected with the rotating arm and is driven by external force to cause the rotating arm to rotate;

the contact end enters from one end of the contact area and moves out from the other end in the rotating process;

the contact area of the contact area used for being in contact with the contact end is A, the contact area of the contact end is B, and A is larger than B.

By adopting the structure, the rotating arm is arranged in a rotating manner, when the driving arm is subjected to external force, the rotating arm rotates, the contact end enters the contact area from one end (the electric connection is realized), slides in the contact area (the contact is always kept in contact, and the electric connection is kept) until the contact end leaves the contact area (the contact end is disconnected with the contact piece), and the function of firstly closing under the action of the external force in the same direction and then opening after a period of time is continued can be realized.

The contact area is arc-shaped, and the circle center of the arc-shaped area is close to the rotation center of the rotating arm or is the same point with the rotation center of the rotating arm.

And the surface of the contact end, which is used for being in contact with the contact area, is an arc surface.

The device also comprises a biasing member connected with the rotating arm or the driving arm, and the biasing member is used for driving the rotating arm to reset after the external force is lost.

Wherein the biasing member is a torsion spring.

The rotating arm and the touch plate are both arranged in the shell; one end of the driving arm extends into the shell, and the other end of the driving arm extends out of the shell.

Wherein, the one end of actuating arm far away from the rotor arm is for the insulating part or the cover is equipped with the insulating part.

Wherein, the driving arm and the rotating arm are integrated.

Wherein the touch plate is statically arranged.

Wherein the touch plate is arranged in a rotating way; the contact end is connected with the contact end through the contact plate, and the contact plate is connected with the contact end through the contact plate; when the contact end is disengaged from the contact plate, the second biasing member drives the contact end to return.

Wherein, a shaft is fixed on the shell, a through hole is arranged on the rotating arm, and the through hole is matched with the shaft to realize rotation.

Wherein, rotate on the shell and set up an axle, set up a groove the same with actuating arm and rotor arm handing-over department shape on the axle, the drive arm inlays in the groove with rotor arm handing-over department.

In order to adapt to the integrated molding of the driving arm and the rotating arm, a groove with the same shape as the joint of the driving arm and the rotating arm is formed in the shaft, and the joint of the driving arm and the rotating arm is embedded into the groove.

A commutation breaker comprises an input end, an output end, a moving contact, a fixed contact and a solid-state switch circuit;

the moving contact and the static contact are connected in series between the input end and the output end;

the solid-state switch circuit is electrically connected between the input end and the output end and is connected with the movable contact and the fixed contact in parallel; the solid-state switch circuit is provided with the trigger switch, and a driving arm of the trigger switch is positioned in a rotating track of the movable contact.

And the part of the moving contact, which is in contact with the driving arm, is provided with an insulating structure.

Wherein, the driving arm of the trigger switch is arranged above the moving contact.

By adopting the structure of the trigger switch structure, the rotating arm is arranged in a rotating manner, when the driving arm is subjected to external force, the rotating arm rotates, the contact end enters the contact area (the electric connection is realized) from one end, slides in the contact area (the contact is always in contact with the contact, and the electric connection is kept) until the contact end leaves the contact area (the contact end is disconnected with the contact piece), so that the functions of closing under the action of the external force in the same direction and then opening after a period of time.

the solid-state switch circuit is electrically connected between the input end and the output end and is connected with the movable contact and the fixed contact in parallel; the solid-state switch circuit is provided with the trigger switch, and a driving arm of the trigger switch is connected with the moving contact through a flexible component.

A current conversion circuit breaker comprises an input end, an output end, a moving contact, a fixed contact, a solid-state switch circuit and a rotating shaft;

the solid-state switch circuit is electrically connected between the input end and the output end and is connected with the movable contact and the fixed contact in parallel;

the rotating shaft and the moving contact are arranged in a linkage manner;

the solid-state switch circuit is provided with the trigger switch, and the driving arm of the trigger switch is positioned in the rotating track of the rotating shaft.

Wherein, the driving arm of the trigger switch is arranged above the rotating shaft.

The rotating shaft is provided with a cavity, the moving contact is in a closing state, and the driving arm extends into the cavity; when the movable contact is switched from a closing state to an opening state, the side wall of the concave cavity gives external force to the driving arm.

A current conversion circuit breaker comprises an input end, an output end, a moving contact, a fixed contact, a solid-state switch circuit, a rotating shaft and a linkage mechanism;

the linkage mechanism, the rotating shaft and the moving contact are arranged in a linkage manner;

the solid-state switch circuit is provided with the trigger switch, and the driving arm of the trigger switch is positioned in the motion trail of the linkage mechanism.

The linkage mechanism comprises a lower connecting rod, the lower connecting rod is connected with the rotating shaft through a pin shaft, and the driving arm is located in the motion track of the pin shaft.

Drawings

Fig. 1 is a structural view of a trigger switch of embodiment 1 of the present invention when no external force is applied;

fig. 2 is a structural view of the trigger switch of embodiment 1 of the present invention when triggered by an external force;

fig. 3 is a structural diagram of the trigger switch of embodiment 1 of the present invention, which is triggered by an external force and separated from the touch panel;

FIG. 4 is a structural view of a trigger switch according to embodiment 1 of the present invention with additional torsion springs;

fig. 5 is a structural view of a trigger switch modification of embodiment 1 of the present invention;

fig. 6 is a schematic diagram of a commutating circuit breaker in a closing state according to embodiment 2 of the present invention;

fig. 7 is a schematic diagram of a commutation breaker in embodiment 2 of the present invention when the trigger switch is triggered;

fig. 8 is a schematic diagram of a commutating circuit breaker in an opening state according to embodiment 2 of the present invention;

fig. 9 is a structural view of a movable contact and a trigger switch in embodiment 2 of the present invention;

fig. 10 is a structural diagram of a movable contact and a trigger switch in a variation of embodiment 2 of the present invention;

fig. 11 is a schematic diagram of a commutating circuit breaker in an opening state according to embodiment 3 of the present invention;

fig. 12 is a structural view of a rotating shaft and a trigger switch in embodiment 3 of the present invention;

fig. 13 is a structural diagram of the pin and the trigger switch in embodiment 4 of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to achieve the above object, the present invention provides a trigger switch, which includes a rotation arm, a touch panel, and a driving arm; the rotating arm is made of conductive materials, one end of the rotating arm is a rotating end which is rotatably arranged with a fulcrum, and the other end of the rotating arm is a contact end which is used for being in contact with the touch panel; the contact plate is made of conductive materials and provided with a section of contact area used for being in contact with the contact end, and the contact area is arranged in a rotating track of the contact end; the driving arm is connected with the rotating arm and is driven by external force to cause the rotating arm to rotate; the contact end enters from one end of the contact area and moves out from the other end in the rotating process; the contact area of the contact area used for being in contact with the contact end is A, the contact area of the contact end is B, and A is larger than B.

Because the motion track of the contact end is arc-shaped, in order to be more suitable for the contact end to keep contact in the motion process, the contact area can be set into an arc-shaped structure, and the circle center of the arc-shaped structure is close to the rotation center of the rotating arm or is the same point with the rotation center of the rotating arm.

The design is beneficial to the smoothness of the contact process of the contact end and the contact area.

In addition to the arc-shaped contact area, the surface of the contact end can be made into an arc surface, so that the contact end can be touched with the contact area more smoothly.

For some application scenarios that the trigger switch rotating arm needs to return from the original path, a biasing member may be disposed on the rotating arm or the driving arm, and the common biasing member is a torsion spring, a compression spring, a tension spring, or a spring plate, so that when the driving arm loses external force, the driving arm can return to the original position by virtue of the biasing force of the biasing member.

In order to make the trigger switch into a modular structure, a shell can be arranged, then the rotating arm and the touch plate are arranged in the shell, and one end of the driving arm is arranged in the shell, and the other end of the driving arm is arranged outside the shell.

In order to avoid the situation that the driving arm has electric conduction to influence the contact end in some specific occasions, one end of the driving arm far away from the rotating arm can be made into an insulating part, or the insulating part is sleeved on the end, and the insulating part can be various in types, such as a plastic part, a rubber part and the like.

In order to facilitate the machining of the driving arm and the rotating arm, the driving arm and the rotating arm can be made into a whole, which is beneficial to the machining.

In order to facilitate the rotation of the rotating arm, a through hole can be formed in the rotating arm, and the rotating arm is sleeved on a shaft to complete the rotation.

Instead of a statically arranged touch pad solution as described above, a movably arranged touch pad may be used.

The movably arranged touch plate is provided with a rotating center and a second biasing member, and the touch plate is arranged in a rotating way; the contact end is connected with the contact end through the contact plate, and the contact plate is connected with the contact end through the contact plate; when the contact end is disengaged from the contact plate, the second biasing member drives the contact plate to return.

Therefore, when the rotating arm rotates to contact with the touch plate, the touch plate is contacted with the contact end under the action of the second biasing part, the touch plate is separated from the contact arm after contacting for a period of time in the continuous rotating process of the rotating arm, and the second biasing part can drive the touch plate to return to the original position; the process of rotating the arm in the opposite direction is similar, except that the direction of rotation of the touch plate is changed downward.

The specific structure of the trigger switch is mainly described above, and several ways of applying the trigger switch to the circuit breaker will be described below.

The first mode is driven by using a moving contact:

a current conversion circuit breaker comprises an input end (also called a power end), an output end (also called a load end), a moving contact, a static contact and a solid-state switch circuit;

the moving contact and the static contact are connected in series between the input end and the output end, so that the connection between the power supply end and the load end can be realized by closing the moving contact and the static contact.

The solid-state switch circuit is electrically connected between the input end and the output end, and is connected with the movable contact and the fixed contact in parallel.

The solid state switching circuit has a trigger switch, which in the above embodiment is the trigger switch with the torsion spring return.

The actual function of the trigger switch is that when the contact end of the trigger switch contacts with the touch panel, a signal is fed back to the solid-state switch circuit, and the solid-state switch can be turned on or turned on after a period of time delay after receiving the signal, so that the current flowing between the moving contact and the static contact can be transferred to the solid-state switch circuit.

The driving arm of the trigger switch in the scheme is in the rotating track of the moving contact, namely when the moving contact is switched from closing to opening, the moving contact can push the driving arm to move after moving for a period of time, and at the moment, the rotating arm rotates for a certain angle and then contacts the contact plate, so that a trigger signal is given to the solid-state switch circuit. In the process that the moving contact continuously rotates, the rotating arm also continuously rotates to be separated from the touch plate, then the moving contact also rotates to the brake separating position finally, and the driving arm always abuts against the moving contact, so that the torsion spring has the force storage. When the moving contact is switched on from the opening direction, the accumulated force of the torsion spring drives the driving arm to rotate, and the driving arm contacts the contact plate after moving for a certain angle, so that a trigger signal is given to the solid-state switching circuit. In the process that the moving contact continuously rotates, the rotating arm also continuously rotates to be separated from the contact plate, then is separated from the moving contact to return to the original position, and the moving contact also continuously rotates to finally reach the switching-on position.

As a variant, the trigger switch may be free of a torsion spring and connected to the drive arm by a flexible member, such as a soft insulator or cord.

The motion of this structure would be as follows:

firstly, the driving arm is still in the rotating track of the moving contact, namely when the moving contact is switched from closing to opening, the moving contact can push the driving arm to move after moving for a period of time, and at the moment, the rotating arm rotates for a certain angle and then contacts the touch panel, so that a trigger signal is given to the solid-state switching circuit. In the process that the movable contact continuously rotates, the rotating arm also continuously rotates to be separated from the contact plate, and then the movable contact also rotates to finally reach the brake separating position. When the moving contact is switched on from the switching-off direction, the moving contact can pull the driving arm to rotate under the action of the flexible component, and the driving arm contacts the contact plate after moving for a certain angle, so that a trigger signal is given to the solid-state switch circuit. In the process that the moving contact continuously rotates, the rotating arm also continuously rotates to be separated from the contact plate, then is separated from the moving contact to return to the original position, and the moving contact also continuously rotates to finally reach the switching-on position.

The mode two, utilize the pivot to drive:

a current conversion circuit breaker comprises an input end (also called a power end), an output end (also called a load end), a moving contact, a static contact, a solid-state switch circuit and a rotating shaft;

The moving contact is arranged on the rotating shaft, and the moving contact is linked with the rotating shaft.

The driving arm of the trigger switch is arranged above the rotating shaft and is positioned in the rotating track of the rotating shaft.

When the movable contact is switched from closing to opening, the rotating shaft moves for a period of time to push the driving arm to move, and the rotating arm rotates for a certain angle and then contacts the touch panel, so that a trigger signal is given to the solid-state switching circuit. In the process that the rotating shaft continues to rotate, the rotating arm can continue to rotate to be separated from the touch plate, then the rotating shaft can rotate to the brake separating position finally, and the torsion spring stores force because the driving arm always abuts against the rotating shaft. When the moving contact is switched on from the opening direction, the rotating shaft can move in the same direction, the stored force of the torsion spring can drive the driving arm to rotate, and the driving arm contacts with the touch plate after moving for a certain angle, so that a trigger signal is given to the solid-state switching circuit. In the process that the rotating shaft continues to rotate, the rotating arm can also continue to rotate to separate from the contact plate, then the rotating arm is separated from the moving contact and returns to the original position, and the rotating shaft can also continue to rotate and finally reaches the switching-on position.

As an extension deformation scheme, a concave cavity can be formed in the rotating shaft, the moving contact is in a closing state, and the driving arm can just stretch into the concave cavity; when the movable contact is switched from a closing state to an opening state, the side wall of the concave cavity gives external force to the driving arm.

And in a third mode, the driving is carried out by utilizing a linkage mechanism associated with the movable contact:

a current conversion circuit breaker comprises an input end (also called a power end), an output end (also called a load end), a moving contact, a static contact, a solid-state switch circuit, a rotating shaft and a linkage mechanism;

The linkage mechanism, the rotating shaft and the moving contact are arranged in a linkage manner.

The linkage mechanism comprises a lower connecting rod, the lower connecting rod is connected with the rotating shaft through a pin shaft, and the connection mode between the lower connecting rod and the rotating shaft belongs to the prior art and is not repeated.

In the scheme, the driving arm of the trigger switch is positioned in the motion trail of the pin shaft, namely when the movable contact is switched from closing to opening, the pin shaft connected between the lower connecting rod and the rotating shaft also moves simultaneously, the pin shaft can drive the driving arm to rotate, and the rotating arm rotates for a certain angle and then contacts the contact plate, so that a trigger signal is given to the solid-state switch circuit. In the process that the moving contact continuously rotates, the rotating arm also continuously rotates to be separated from the touch plate, then the pin shaft can continuously move and finally reaches the position of the moving contact for opening, and the driving arm always abuts against the pin shaft, so that the torsion spring stores force. When the moving contact is switched on from the opening direction, the pin shaft can move along with the moving contact, the stored force of the torsion spring can drive the driving arm to rotate, and the driving arm contacts the touch plate after moving for a certain angle, so that a trigger signal is given to the solid-state switching circuit. In the process of continuous movement of the pin shaft, the rotating arm can also continuously rotate to separate from the contact plate and then separate from the pin shaft to return to the original position, and the pin shaft can also continuously move to the position where the movable contact is finally switched on.

The following describes the above embodiments with reference to three preferred embodiments.

Example 1:

as shown in fig. 1 to 3, a trigger switch includes a housing 1, a rotary arm 2, a contact plate 3, a driving arm 4, a shaft 5, a first terminal 7, and a second terminal 8.

The first terminal 7 and the second terminal 8 are disposed on the surface of the housing 1, and the contact plate 3, the rotating arm 2, and the shaft 5 are disposed in the cavity of the housing 1. One end of the driving arm 4 extends out of the housing 1 and the other end is located inside the housing 1.

The first terminal 7 is electrically connected to the contact plate 3, and the second terminal 8 is electrically connected to the rotating arm 2 or the driving arm 4.

For rotating the setting between axle 5 and the shell 1, set up the groove 9 of V type on the axle 5, the groove 9 structure of V type can be mutually supported with the department of being connected of actuating arm 4 and rotor arm 2, and when actuating arm 4 received the exogenic action like this, axle 5 can take place rotatoryly.

The rotating arm 2 and the driving arm 4 are both made of conductive materials and are integrated to form a V-shaped bend.

The end of the rotating arm 2 far away from the driving arm 4 is a contact end 10, and the end contact surface of the contact end 10 is an arc surface.

The contact plate 3 is made of an electrically conductive material and is fixedly arranged with the housing 1, one surface of the contact plate 3 facing the contact end 10 is an arc-shaped structure, and the arc-shaped structure is a contact area 11 actually used for contacting with the contact end 10, so that the whole contact area 11 is located in a rotation track of the contact end 10, a contact area of the contact area 11 used for contacting with the contact end 10 is a, a contact area of the contact end 10 is B, and a is larger than B.

This makes it possible that the contact 10 can enter from one end of the contact area 11 and continue to contact the contact area 11 when the contact 10 is rotated by an external force, until the contact 10 is moved out of contact from the other end of the contact area 11.

In order to avoid the situation that the driving arm 4 has electric conduction to affect the contact end 10 in some specific occasions, one end of the driving arm 4 far away from the rotating arm 2 may be made into an insulating member, for example, a plastic member 12 is clamped with the rotating arm 2, or a plastic or rubber outer sleeve is sleeved on the end.

For some structures which need to be reset after being contacted by external force of the trigger switch, the design of the torsion spring 6 can be added on the basis.

As shown in fig. 4, a torsion spring 6 is sleeved outside the shaft 5, one end of the torsion spring 6 is connected with the housing 1, and the other end of the torsion spring 6 is connected with the shaft 5, so that the torsion spring 6 can be used for resetting after the shaft 5 rotates.

The process of such structural movement is as follows:

when the contact 10 is rotated by an external force, the contact 10 can enter from the upper end of the contact area 11 and continuously contact with the contact area 11 until the contact 10 moves out of contact from the lower end of the contact area 11, and the torsion spring 6 is gradually deformed in the process. When the external force of the contact end 10 is released, the reset force of the torsion spring 6 can drive the contact end 10 to rotate reversely, the contact end 10 can enter from the lower end of the contact area 11 and is continuously contacted with the contact area 11 until the contact end 10 moves out of the upper end of the contact area 11 to release the contact, and the movement of the torsion spring 6 is not stopped until the original contact end 10 is restored.

In addition to the embodiment of the contact plate 3 with a stationary arrangement in example 1, it is also possible to deform it to form an embodiment of the contact plate 3 with a movable arrangement.

As shown in fig. 5, the movably arranged touch panel 3 comprises a touch panel 3, the touch panel 3 is rotatably arranged in the housing 1, and a second biasing member 61 is arranged between the touch panel 3 and the housing 1, and the second biasing member 61 may also be in the structure of a torsion spring 6.

Therefore, when the rotating arm 2 rotates to contact the contact plate 3, the contact plate 3 is contacted with the contact end 10 under the action of the second biasing part 61, and in the continuous rotating process of the rotating arm 2, the contact plate 3 is separated from the contact arm after contacting the contact arm for a period of time, and at the moment, the second biasing part 61 can drive the contact plate 3 to return to the original position; the process of pivoting the arm 2 is similar if the opposite pivoting is used, except that the pivoting direction of the contact plate 3 is changed downwards.

Example 2:

the embodiment is an embodiment applied to a commutation breaker, that is, the trigger switch structure in embodiment 1 is applied to a commutation breaker.

As shown in fig. 6-9, a commutating circuit breaker comprises a housing, an input end 13, an output end 14, a movable contact 15, a fixed contact 16, a solid-state switching circuit 17 and a conductive member 22.

The output end 14 and the movable contact 15 are electrically connected, and the electrical connection forms are many and can be flexible connection structures.

The input end 13 and the static contact 16 are electrically connected in many forms, and may be a busbar connection structure.

The solid-state switching circuit 17 is an IGBT circuit or an IGCT circuit.

The solid-state switching circuit 17 has a trigger switch (i.e. a solution with a torsion spring on a shaft) with the structure of the torsion spring 6 in the above-mentioned embodiment 1, and the driving arm 4 of the trigger switch is located in the rotation track of the movable contact 15.

The first terminal 7 and the second terminal 8 of the trigger switch are electrically connected with the solid-state switch circuit 17 to form a loop, when the contact end 10 of the trigger switch is in contact with the touch plate 3, the loop is conducted, the solid-state switch circuit 17 can obtain a signal, and the solid-state switch circuit 17 stores energy and is conducted after obtaining the signal. How the solid-state switch circuit 17 stores energy and conducts after obtaining a signal belongs to the prior art, and redundant description is omitted.

The specific movement process is as follows:

when the movable contact 15 is switched from a closing state to an opening state, the movable contact 15 contacts the driving arm 4 in the movement process, so that the rotating arm 2 rotates, the contact end 10 can enter from the upper end of the contact area 11 and is continuously contacted with the contact area 11 until the contact end 10 moves out of the lower end of the contact area 11 to release the contact, and the torsion spring gradually deforms in the process.

When the movable contact 15 is switched from an opening state to a closing state, the external force of the movable contact 15 on the driving arm 4 is removed, the reset force of the torsion spring can drive the rotating arm 2 to rotate reversely, the contact end 10 can enter from the lower end of the contact area 11 and is continuously contacted with the contact area 11 until the contact end 10 is moved out of the upper end of the contact area 11 to remove the contact, the movable contact 15 continues to move until the contact is closed, the movable contact 15 can be completely separated from the driving arm 4 in the process, and the torsion spring 6 is restored to the original shape.

As shown in FIG. 10, as a modified example of example 2, the rest of the constitution is the same as example 2 except that the trigger switch of example 1 is a trigger switch without a torsion spring 6 (i.e., a mode without a torsion spring on a shaft)

In this case, a flexible member 23 is used between the movable contact 15 and the driving arm 4, wherein the flexible member may be a flexible insulator or a flexible wire.

The specific movement process of the structure is as follows:

when the movable contact 15 is switched from a closing state to an opening state, the movable contact 15 pulls the rotating arm 2 to rotate, and the contact end 10 can enter from the upper end of the contact area 11 and is continuously contacted with the contact area 11 until the contact end 10 moves out of the lower end of the contact area 11 to release the contact.

When the movable contact 15 is switched from the opening state to the closing state, the movable contact 15 pulls the rotating arm 2 to rotate reversely, and the contact end 10 can enter from the lower end of the contact area 11 and continuously contact with the contact area 11 until the contact end 10 moves out of the upper end of the contact area 11 to release the contact.

Example 3:

As shown in fig. 11-12, a commutating circuit breaker comprises a housing, an input end 13, an output end 14, a movable contact 15, a fixed contact 16, a solid-state switching circuit 17, a conductive member 22 and a rotating shaft 18.

The solid-state switching circuit 17 is an IGBT circuit or an IGCT circuit.

The moving contact 15 is linked with a rotating shaft 18, and a concave cavity 19 can be arranged on the rotating shaft 18. The solid-state switching circuit 17 has a trigger switch (i.e. a scheme with a torsion spring on a shaft) with a torsion spring 6 structure in the above embodiment 1, the driving arm 4 can just extend into the cavity 19, and when the movable contact 15 is turned from the closing state to the opening state, the side wall of the cavity gives external force to the driving arm 4.

The specific movement process is as follows:

when the movable contact 15 is switched from a closing state to an opening state, the rotating shaft 18 moves along with the movable contact and contacts the driving arm 4 in the moving process, so that the rotating arm 2 rotates, the contact end 10 can enter from the upper end of the contact area 11 and is continuously contacted with the contact area 11 until the contact end 10 moves out of the lower end of the contact area 11 to release the contact, and the torsion spring 6 gradually deforms in the process.

When the moving contact 15 is switched from an opening state to a closing state, the rotating shaft 18 moves in a reverse direction, the external force of the rotating shaft 18 on the driving arm 4 is removed, the rotating arm 2 can be driven to rotate in a reverse direction by the reset force of the torsion spring, the contact end 10 can enter from the lower end of the contact area 11 and is continuously contacted with the contact area 11 until the contact end 10 is moved out of the upper end of the contact area 11 to remove the contact, the moving contact 15 continues to move until the contact is closed, the moving contact 15 can be completely separated from the driving arm 4 in the process, and the torsion spring is restored to.

Example 4:

the present embodiment is an embodiment applied to a commutating circuit breaker, and embodiment 4 is different from embodiment 3 in the position of a trigger switch and the location of triggering.

As shown in fig. 13, the circuit breaker further has a linkage mechanism, the linkage mechanism includes a lower link 20, the lower link 20 is connected to the rotating shaft 18 through a pin 21, and the driving arm 4 of the trigger switch is located in the motion track of the pin 21.

The pin 21 is used between the lower link 20 and the rotating shaft 18, which belongs to the prior art, and when the moving state of the movable contact 15 changes, the pin 21 also changes in position, and thus can be used to drive the trigger switch.

It should be noted that the terms "first," "second," "third," and the like in the description and in the claims, and in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein.

Claims

1. A trigger switch, characterized by: comprises a rotating arm (2), a touch plate (3) and a driving arm (4);

the rotating arm (2) is made of conductive materials, one end of the rotating arm is a rotating end which is rotatably arranged with a fulcrum, and the other end of the rotating arm is a contact end (10) which is used for being in contact with the touch plate (3);

the contact plate (3) is made of conductive materials and provided with a section of contact area (11) used for being in contact with the contact end (10), and the contact area (11) is arranged in a rotating track of the contact end (10);

the driving arm (4) is connected with the rotating arm (2), and the driving arm (4) is driven by external force to cause the rotating arm (2) to rotate;

the contact end (10) enters from one end of the contact area (11) and moves out from the other end in the rotating process;

the contact area of the contact region (11) for contacting with the contact end (10) is A, the contact area of the contact end (10) is B, and A is larger than B.

2. A trigger switch as claimed in claim 1, wherein: the contact area (11) is arc-shaped, and the circle center of the arc-shaped is close to the rotation center of the rotating arm (2) or is the same point with the rotation center of the rotating arm (2).

3. A trigger switch as claimed in claim 1, wherein: the surface of the contact end (10) which is used for being in contact with the contact area (11) is an arc surface.

4. A trigger switch as claimed in claim 1, wherein: the device also comprises a biasing member (6) connected with the rotating arm (2) or the driving arm (4), wherein the biasing member (6) is used for driving the rotating arm (2) to reset after external force is lost.

5. A trigger switch as claimed in claim 1, wherein: the biasing member (6) is a torsion spring.

6. A trigger switch as claimed in claim 1, wherein: the device also comprises a shell (1), wherein the rotating arm (2) and the touch plate (3) are arranged in the shell (1); one end of the driving arm (4) extends into the shell (1), and the other end extends out of the shell (1).

7. A commutation breaker comprises an input end (13), an output end (14), a movable contact (15), a fixed contact (16) and a solid-state switch circuit (17);

the moving contact and the static contact (15, 16) are connected in series between the input end (13) and the output end (14);

the solid-state switch circuit (17) is electrically connected between the input end (13) and the output end (14), and the solid-state switch circuit (17) is connected with the moving contact and the static contact (16) in parallel; the method is characterized in that: the solid-state switching circuit (17) has a trigger switch as claimed in claim 4 or 5, the actuating arm (4) of which is located in the rotational path of the movable contact (15).

8. A commutation breaker comprises an input end (13), an output end (14), a movable contact (15), a fixed contact (16) and a solid-state switch circuit (17);

the moving contact and the static contact (16) are connected in series between the input end (13) and the output end (14);

the solid-state switch circuit (17) is electrically connected between the input end (13) and the output end (14), and the solid-state switch circuit (17) is connected with the moving contact and the static contact (15, 16) in parallel; the method is characterized in that: solid-state switching circuit (17) having a trigger switch according to any of claims 1 to 3,6 to 12, the actuating arm (4) of which is connected to the movable contact (15) by means of a flexible element (23).

9. A commutation breaker comprises an input end (13), an output end (14), a movable contact (15), a fixed contact (16), a solid-state switch circuit (17) and a rotating shaft (18);

the solid-state switch circuit (17) is electrically connected between the input end (13) and the output end (14), and the solid-state switch circuit (17) is connected with the moving contact and the static contact (16) in parallel;

the rotating shaft (18) and the moving contact (15) are arranged in a linkage manner;

the method is characterized in that: the solid-state switching circuit (17) has a trigger switch as claimed in claims 4 to 5, the actuating arm (4) of which lies in the rotational path of the spindle (18).

10. A commutation breaker comprises an input end (13), an output end (14), a movable contact (15), a fixed contact (16), a solid-state switch circuit (17), a rotating shaft (18) and a linkage mechanism;

the linkage mechanism, the rotating shaft (18) and the moving contact (15) are arranged in a linkage manner;

the method is characterized in that: the solid-state switching circuit (17) has a trigger switch as claimed in claims 4 to 5, the drive arm (4) of which is located in the movement path of the linkage.