CN215496582U - Circuit breaker isolation structure and circuit breaker - Google Patents

Abstract

The application relates to the technical field of circuit breakers, in particular to a circuit breaker isolation structure and a circuit breaker, and aims to solve the technical problem that great potential safety hazards exist in circuit breaker maintenance in the prior art. Comprises a shell; the movable contact assembly is rotatably arranged on the shell, and a stop block is fixed on the movable contact assembly; the connecting rod component is suitable for driving the moving contact component to rotate and switching the moving contact component between a brake opening position and a brake closing position; a handle adapted to rotate about the housing; a first end of the tension spring is rotationally connected with the connecting rod assembly, and a second end of the tension spring is rotationally connected with the handle; the handle drives the connecting rod assembly to move through the tension spring, the handle is provided with a lug, when the movable contact assembly is in an abnormal closing state, the stop block stops the lug from moving, and the handle is reset to a closing position under the driving of the tension spring. This application can ensure when the circuit breaker is in the separating brake state, certainly have the clearance between the sound contact, have isolation function, and then guaranteed maintenance personal maintenance safety.

Description

Circuit breaker isolation structure and circuit breaker

Technical Field

The application relates to the technical field of circuit breakers, in particular to a circuit breaker isolation structure and a circuit breaker.

Background

A circuit breaker is a switching device capable of carrying and breaking a current under an abnormal circuit condition for a predetermined time. The circuit breaker generally includes an operating mechanism, a contact mechanism, a thermomagnetic protection mechanism, an arc extinguishing mechanism, and the like.

Among the current part circuit breaker, operating device includes handle, extension spring, link assembly, and the handle passes through the extension spring and drives link assembly motion, and link assembly drives contact mechanism motion to realize the contact or the separation of moving contact and static contact, for example, utility model patent of publication No. CN 102034652B. The structure changes the length of the tension spring from a closing state to an opening state to a first lengthening state and then shortening state, so that the handle can realize self-locking at the opening/closing position.

To the above prior art, the utility model discloses the people think that this structure has following defect: if the static contact and the moving contact of the circuit breaker are bonded together to cause a fault, the handle can still be pulled due to the existence of the spring although the connecting rod assembly and the contact mechanism can not perform large-scale actions. When operating personnel maintained, can pull the handle to the separating brake position, because still not clear the circuit breaker failure reason, can think that the circuit breaker has been in the outage state this moment, then maintain, but its circuit breaker still is in the on-state, has great potential safety hazard.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem that this application will be solved lies in overcoming the defect that there is great potential safety hazard in the maintenance when the breaker takes place the static contact bonding trouble among the prior art to a circuit breaker isolating structure and circuit breaker that can remind maintainer's true on/off state of circuit breaker is provided.

In order to solve the above technical problem, the present application provides a circuit breaker isolating structure, include:

a housing;

the movable contact assembly is rotatably arranged on the shell, and a stop block which is suitable for rotating along with the movable contact assembly is fixed on the movable contact assembly;

the connecting rod component is suitable for driving the moving contact component to rotate and switching the moving contact component between an opening position and a closing position;

a handle adapted to rotate about the housing;

a first end of the tension spring is rotationally connected with the connecting rod assembly, and a second end of the tension spring is rotationally connected with the handle;

the handle passes through the extension spring drives link assembly action, be provided with the lug on the handle, when moving contact subassembly is in unusual combined floodgate state, the dog blocks the lug removes in order to restrict the handle is from closing the floodgate position to the position removal of separating brake, and make under the drive of extension spring the handle resets to the position of closing the floodgate.

Optionally, the handle comprises:

the U-shaped bracket is clamped outside the shell, and two ends of the U-shaped bracket are rotatably arranged on the shell;

the lug is fixed on one wing part of the U-shaped bracket;

and the pushing and pulling piece is arranged on the outer side of the abdomen of the U-shaped support and is rotationally connected with the second end of the tension spring.

Optionally, the push-pull member is hinged to the U-shaped bracket through a first shaft, a second shaft is fixed on the surface of the push-pull member close to the U-shaped bracket, a clamping groove is formed in the outer surface of the abdomen of the U-shaped bracket, the second shaft is clamped in the clamping groove and is rotatably connected with the second end of the tension spring, the first shaft and the second shaft are perpendicular to the push-pull direction of the push-pull member, and the end portion, far away from the first shaft, of the push-pull member is clamped on the U-shaped bracket.

Optionally, the movable contact assembly includes:

the movable contact frame is rotatably arranged on the shell and is rotatably connected with the end part of the connecting rod assembly;

the stop block is fixed on the surface of the movable contact frame;

the moving contact is arranged on the moving contact frame.

Optionally, the stopper is a sector and is coaxial with the movable contact frame.

Optionally, the moving contact is installed in the moving contact frame and the axis of rotation coincides with the moving contact frame axis of rotation, the moving contact subassembly still includes:

and the elastic element is suitable for driving the moving contact to rotate towards the direction close to the static contact.

Optionally, the connecting rod assembly includes:

a first end of the first connecting rod is relatively hinged on the shell through a third shaft;

a first end of the second connecting rod is hinged with a second end of the first connecting rod through a fourth shaft, and a second end of the second connecting rod is rotatably connected with the moving contact component through a fifth shaft;

the fourth shaft with the extension spring first end rotates and is connected.

The present application further provides a circuit breaker, including: the aforementioned circuit breaker isolating structure, and

and the tripping assembly is suitable for driving the connecting rod assembly to act.

Optionally, the trip assembly includes:

the first end of the jumper is rotatably installed on the shell, and the middle part of the jumper is rotatably connected with the end part of the connecting rod assembly;

the buckle rotates and installs in the casing, is suitable for by bimetallic strip drive rotation, the buckle joint in jumper bar second end.

Optionally, the buckle includes:

the lock catch is rotatably arranged on the shell and is suitable for being clamped at the second end of the jumper bar;

and the pressing piece is rotatably arranged on the shell, one end of the pressing piece is pressed on the lock catch, and the pressing piece is suitable for being driven to rotate by the bimetallic strip.

This application technical scheme has following advantage:

1. according to the breaker isolation structure and the breaker, the stop block is arranged on the moving contact assembly, and the lug is arranged on the handle, so that the stop block can not interfere with the action of the handle along with the rotation of the moving contact assembly when the breaker is normal, and when the breaker has a fault that the moving contact and the fixed contact are bonded, the lug can abut against the stop block in a rotating mode, so that the handle is prevented from rotating, the handle cannot be pulled to a brake separating position, and therefore when the breaker is in a brake separating state, a gap is certainly formed between the moving contact and the fixed contact, an isolation function is achieved, and the maintenance safety of maintenance personnel is guaranteed;

2. the utility model provides a circuit breaker isolating structure and circuit breaker, handle include U type support and push-and-pull piece, and U type support card is in the casing outside, and the lug is fixed in one of them alar part of U type support, because the handle is generally far away apart with the moving contact subassembly among the actual structure, this structure provides a feasible scheme for the cooperation of lug and dog, and the structure is comparatively simple, and installs outside the casing, and it is more convenient to install.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a circuit breaker isolation structure in an abnormal closing state according to the present application;

fig. 2 is a structural plan view of the circuit breaker isolation structure in the opening state;

fig. 3 is a schematic perspective view of a circuit breaker isolation structure in an opening state according to the present application;

fig. 4 is a schematic perspective view of a second breaker isolation structure in an open state according to the present application;

fig. 5 is a schematic structural diagram of the circuit breaker of the present application.

Description of reference numerals:

1. a housing; 2. a moving contact assembly; 21. a stopper; 22. a movable contact frame; 23. a moving contact; 3. a connecting rod assembly; 31. a first link; 32. a second link; 33. a fourth axis; 34. a third axis; 35. a fifth shaft; 4. a tension spring; 5. a handle; 51. a U-shaped bracket; 52. a push-pull member; 53. a first shaft; 54. a second shaft; 55. a lug; 6. a trip assembly; 61. a jumper bar; 62. buckling; 621. locking; 622. and a pressing member.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

Example one

Referring to fig. 1 to 4, the circuit breaker isolation structure provided in this embodiment includes:

the shell 1 is suitable for providing support for the whole structure, and the shell 1 is in a fixed state during work;

the moving contact component 2 is rotatably arranged on the shell 1, and a stop block 21 which is suitable for rotating along with the moving contact component 2 is fixed on the moving contact component 2; the moving contact assembly 2 is a core component of the circuit breaker, is a mature structure in the field and is mainly matched with a fixed contact to realize the on-off of the circuit breaker; the stop block 21 is a newly added structure of the application and is mainly matched with the subsequent lug 55 to limit the handle 5; in the application, the stopper 21 is required to be arranged on the movable contact component 2 because the stopper 21 has a limiting effect on the handle 5 when abnormal switching-on is realized, and simultaneously, the stopper must also avoid the rotation of the handle 5 when normal switching-off is realized, so that the handle 5 can be smoothly pulled to the switching-off position;

the connecting rod component 3 is suitable for driving the moving contact component 2 to rotate and switching the moving contact component 2 between an opening position and a closing position; the connecting rod assembly 3 is a mature assembly in the field, and specifically, what kind of connecting rod assembly 3 is arranged to drive the movable contact assembly 2 to rotate belongs to the design which is easy for a person in the field to design, for example, two ends of the connecting rod mechanism are respectively hinged with the shell and the movable contact frame, and the tension spring is connected to the middle part of the connecting rod mechanism;

a handle 5 adapted to rotate about the housing 1; the hinge structure is not necessarily adopted, and a clamping structure as shown in fig. 1 is adopted, and the tension spring 4 can be tensioned on the shell 1, or other common structures capable of realizing rotation can be adopted;

a tension spring 4, the first end of which is rotationally connected with the connecting rod component 3 and the second end of which is rotationally connected with the handle 5; the tension spring 4 is a structure mature in the field, and both ends of the tension spring are generally provided with hooks, and the connection is completed through the hooking of the hooks at both ends and other parts, which is well known to those skilled in the art; however, in other embodiments, if the hooks at both ends of the tension spring 4 are replaced by means commonly used in the art, such as two rings, it is also within the scope of the present application, and the specific connection structure thereof is easily designed by those skilled in the art; it should be noted that, no matter what structure the tension spring 4 adopts, both ends of the tension spring should have a rotation allowance with the connected piece, so that the spring can rotate relative to the connected piece, i.e. the "rotation connection";

the handle 5 drives the connecting rod component 3 to act through the tension spring 4, and the handle 5 is provided with a first position corresponding to the opening position of the moving contact component 2 and a second position corresponding to the closing position of the moving contact component 2; the handle 5 is provided with a lug 55, when the movable contact assembly 2 is in an abnormal closing state, the stop block 21 blocks the lug 55 to move so as to limit the handle 5 to move from a closing position to an opening position, and the handle 5 is reset to the closing position under the driving of the tension spring 4.

According to the breaker isolation structure, when the breaker is opened in a normal state, the stop block 21 rotates along with the moving contact component 2, and the action of the lug 55 cannot be blocked, so that the handle 5 can be smoothly pulled to the opening position; when the abnormal state (the circuit breaker has a dynamic and static contact bonding fault) is switched off, the movable contact assembly 2 cannot rotate, so the stop block 21 cannot rotate, and the movement of the lug 55 can be blocked, so that the handle 5 cannot be pulled to the switch-off position, and the handle 5 can be reset to the switch-on position under the driving of the tension spring 4. So, when maintenance personal maintained, if the trouble that takes place sound contact bonding, handle 5 can't be pulled to the separating brake position, reminds maintenance personal circuit breaker's sound contact still to be in the on-state, needs to adopt other means to maintain after the outage, has guaranteed maintenance personal's safety like this.

In this embodiment, a preferred structure of the handle 5 is provided, which specifically includes:

the U-shaped bracket 51 is clamped outside the shell 1, and two ends of the U-shaped bracket 51 are rotatably arranged on the shell 1;

the lug 55 is fixed on one wing part of the U-shaped bracket 51;

and the push-pull piece 52 is arranged on the outer side of the abdomen of the U-shaped bracket 51, and the push-pull piece 52 is rotatably connected with the second end of the tension spring 4.

Specifically, the clamping grooves are formed in two ends of the U-shaped support 51, the pin shaft is fixed on the shell 1, the pin shaft is arranged in the clamping grooves to achieve the rotating installation of the U-shaped support 51 on the shell 1, and the U-shaped support 51 is prevented from falling off through the tension effect of the tension spring 4, so that the structural installation is more convenient.

In other embodiments, the handle 5 can be rotatably mounted on the housing 1 through a connector, the lug 55 can be mounted inside the housing 1, and the stopper 21 can be mounted at a position matched with the lug 55.

According to the breaker isolation structure, the handle 5 comprises the U-shaped support 51 and the push-pull piece 52, when the handle 5 is manually operated, the push-pull piece 52 is used, the operation is convenient, and the breaker isolation structure can be applied to occasions where the materials of the U-shaped support 51 and the push-pull piece 52 are different in practice; the U-shaped bracket 51 and the push-pull piece 52 are arranged in a split manner, the U-shaped bracket 51 is clamped on the outer side of the shell 1, and the push-pull piece 52 is arranged on the outer side of the U-shaped bracket 51, so that the installation is more convenient; the lug 55 is arranged on one of the wings of the U-shaped bracket 51, closer to the movable contact assembly 2, to facilitate the engagement with the stop 21.

In this embodiment, the push-pull member 52 is hinged to the U-shaped bracket 51 through a first shaft 53, a second shaft 54 is fixed on the surface of the push-pull member 52 close to the U-shaped bracket 51, a slot is formed on the outer surface of the abdomen of the U-shaped bracket 51, the second shaft 54 is clamped in the slot and is rotatably connected with the second end of the tension spring 4, the first shaft 53 and the second shaft 54 are both perpendicular to the push-pull direction of the push-pull member 52, and the end of the push-pull member far from the first shaft is clamped on the U-shaped bracket. The handle 5 structure, the assembly of the U-shaped bracket 51 and the push-pull piece 52 is more convenient.

In this embodiment, the movable contact assembly 2 includes:

the movable contact frame 22 is rotatably arranged on the shell 1, and the movable contact frame 22 is rotatably connected with the end part of the connecting rod component 3;

the stop block 21 is fixed on the surface of the movable contact frame 22;

and the movable contact 23 is arranged on the movable contact frame 22.

According to the circuit breaker isolation structure, the stop block 21 is arranged on the surface of the movable contact frame 22, so that the structural design is simpler; if the stopper 21 is provided inside the housing 1, the interference of the stopper 21 with the operation of other internal structures such as a link mechanism needs to be considered, which makes the design complicated.

In this embodiment, the stopper 21 is a sector and is coaxial with the movable contact frame 22, so that the stopper 21 can better ensure the movement of the lug 55 to yield in the normal state of the circuit breaker.

In this embodiment, the moving contact 23 is rotatably mounted on the moving contact frame 22, and a rotating shaft of the moving contact frame 22 coincides with a rotating shaft of the moving contact frame, and the moving contact assembly 2 further includes:

and the elastic element is suitable for driving the movable contact 23 to rotate towards the direction close to the fixed contact, and the elastic element is a spring or a torsion spring and other common elastic structures.

The utility model provides a circuit breaker isolating construction, moving contact 23 compress tightly on quiet contact through the elastic component, can guarantee the in close contact of moving and static contact when closing a floodgate. This structure will also affect the motion state of the moving contact frame 22 in the present application, as follows: when the circuit breaker has a moving contact and static contact bonding fault, the moving contact frame 22 cannot be completely fixed by pulling the handle 5, because the moving contact 23 and the moving contact frame 22 have relative rotation allowance, the moving contact frame 22 also has small rotation at the beginning, but when the moving contact frame 22 moves to an extreme position relative to the moving contact 23, the moving contact frame 22 cannot rotate any more, and at the moment, the stop block 21 cannot rotate along with the moving contact frame 22, so that the lug 55 is blocked.

In this embodiment, the connecting rod assembly 3 includes:

a first link 31, a first end of which is relatively hinged to the housing 1 through a third shaft 34;

a second connecting rod 32, a first end of which is hinged to a second end of the first connecting rod 31 through a fourth shaft 33, and a second end of the second connecting rod 32 is rotatably connected to the movable contact assembly 2 through a fifth shaft 35;

the fourth shaft 33 is rotatably connected with the first end of the tension spring 4.

As a specific structural style, the working process of the circuit breaker isolation structure provided by the embodiment is as follows:

when the breaker is in a normal closing state, the moving contact and the static contact of the breaker are contacted, and the breaker is in a power-on state; when the brake needs to be opened, an operator pushes the push-pull piece 52, the push-pull piece 52 and the U-shaped bracket 51 integrally rotate around the shell 1, the push-pull piece 52 simultaneously drives the tension spring 4 to act, and the tension spring 4 drives the fourth shaft 33 to act, so that the whole connecting rod assembly 3 is driven to act, the movable contact frame 22 is driven to rotate, and the separation of the movable contact and the static contact is realized; if the circuit breaker appears the abnormal state that the sound contact bonded, pull handle 5 and can take movable contact frame 22 to rotate for a short time at first, just can not rotate again when movable contact frame 22 rotates to the extreme position relative to movable contact 23, dog 21 can not rotate along with movable contact frame 22 again this moment, realize the fixed relative casing 1, if continue to promote push-and-pull piece 52 this moment, dog 21 can block the lug 55 motion, thereby restriction handle 5 pulls to the separating brake position, and handle 5 can reset to the closing brake position under the effect of extension spring 4, remind the inside essence of maintenance personal circuit breaker to be in the on-state.

Example two

As shown in fig. 5, the present embodiment provides a circuit breaker, including: the aforementioned circuit breaker isolating structure, and

a tripping assembly 6 adapted to actuate the linkage assembly 3.

In this embodiment, the trip assembly 6 includes:

a jumper 61, the first end of which is rotatably mounted on the shell 1, and the middle part of which is rotatably connected with the end part of the connecting rod assembly 3;

and the buckle 62 is rotatably arranged in the shell 1 and is suitable for being driven by a bimetallic strip to rotate, and the buckle 62 is clamped at the second end of the jumper 61.

When abnormal conditions such as overload or short circuit do not occur, the first end of the jumper 61 is rotatably arranged on the shell 1, and the second section is clamped by the buckle 62 to realize the fixation relative to the shell 1; when short circuit or overload occurs, the thermal/magnetic protection mechanism drives the buckle 62 to rotate and separate from the second end of the jumper 61, the jumper 61 rotates to a position close to the handle 5 under the action of the tension spring 4 to drive the connecting rod assembly 3 to act, so that the movable contact frame 22 is driven to rotate, and the separation of the movable contact and the fixed contact is realized.

In this embodiment, the buckle 62 includes:

the lock 621 is rotatably installed on the housing 1 and is suitable for being clamped at the second end of the jumper 61;

the pressing member 622 is rotatably mounted on the housing 1, and one end of the pressing member is pressed on the latch 621, and the pressing member 622 can be specifically matched with a torsion spring to realize pressing and is suitable for being driven by a bimetallic strip to rotate.

Hasp 621 joint jumper bar 61 second end, compress tightly piece 622 and compress tightly hasp 621 and ensure that it can not break away from, and both cooperate the fixed of realizing jumper bar 61 jointly, and locking is more firm.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this invention are intended to be covered by the scope of the invention as expressed herein.

Claims (10)

1. A circuit breaker isolation structure, comprising:

a housing (1);

the moving contact component (2) is rotatably arranged on the shell (1), and a stop block (21) which is suitable for rotating along with the moving contact component (2) is fixed on the moving contact component (2);

the connecting rod component (3) is suitable for driving the moving contact component (2) to rotate and enabling the moving contact component (2) to be switched between a switching-off position and a switching-on position;

a handle (5) adapted to rotate about the housing (1);

a tension spring (4), wherein the first end of the tension spring is rotationally connected with the connecting rod component (3), and the second end of the tension spring is rotationally connected with the handle (5);

handle (5) pass through extension spring (4) drive link assembly (3) action, be provided with lug (55) on handle (5), work as when moving contact subassembly (2) are in unusual combined floodgate state, dog (21) block lug (55) remove in order to restrict handle (5) are by the combined floodgate position to the separation floodgate position removal, and make under the drive of extension spring (4) handle (5) reset to the combined floodgate position.

2. Circuit breaker isolation structure according to claim 1, characterized in that said handle (5) comprises:

the U-shaped bracket (52) is clamped at the outer side of the shell (1), and two ends of the U-shaped bracket (52) are rotatably arranged on the shell (1);

the lug (55) is fixed on one wing part of the U-shaped bracket (52);

the push-pull piece (51) is installed on the outer side of the abdomen of the U-shaped support (52), and the push-pull piece (51) is rotatably connected with the second end of the tension spring (4).

3. The circuit breaker isolation structure according to claim 2, wherein the push-pull member (51) is hinged to the U-shaped bracket (52) through a first shaft (53), a second shaft (54) is fixed on a surface of the push-pull member (51) close to the U-shaped bracket (52), a clamping groove is formed in an outer surface of a belly of the U-shaped bracket (52), the second shaft (54) is clamped in the clamping groove and is rotatably connected with the second end of the tension spring (4), the first shaft (53) and the second shaft (54) are both perpendicular to a push-pull direction of the push-pull member (51), and an end portion, far away from the first shaft (53), of the push-pull member (51) is clamped on the U-shaped bracket (52).

4. Circuit breaker isolation structure according to claim 1, characterized in that said moving contact assembly (2) comprises:

the movable contact frame (22) is rotatably arranged on the shell (1), and the movable contact frame (22) is rotatably connected with the end part of the connecting rod component (3);

the stop block (21) is fixed on the surface of the movable contact frame (22);

and the moving contact (23) is arranged on the moving contact frame (22).

5. Circuit breaker isolation structure according to claim 4, characterized in that the stop (21) is a sector and is coaxial with the moving contact carrier (22).

6. The circuit breaker isolation structure according to claim 4, wherein said movable contact (23) is rotatably mounted on said movable contact frame (22) with a rotation axis coinciding with a rotation axis of said movable contact frame (22), said movable contact assembly (2) further comprising:

and the elastic element is suitable for driving the movable contact (23) to rotate towards the direction close to the fixed contact.

7. Circuit breaker isolation structure according to claim 1, characterized in that said linkage assembly (3) comprises:

a first connecting rod (31) with a first end relatively hinged on the shell (1) through a third shaft (34);

a second connecting rod (32), wherein the first end of the second connecting rod (32) is hinged with the second end of the first connecting rod (31) through a fourth shaft (33), and the second end of the second connecting rod (32) is rotatably connected with the movable contact assembly (2) through a fifth shaft (35);

the fourth shaft (33) is rotatably connected with the first end of the tension spring (4).

8. A circuit breaker, comprising: the circuit breaker isolation structure of any one of claims 1-7, and

and the tripping assembly (6) is suitable for driving the connecting rod assembly (3) to act.

9. The circuit breaker according to claim 8, characterized in that said trip assembly (6) comprises:

the first end of the jumper (61) is rotatably arranged on the shell (1), and the middle part of the jumper is rotatably connected with the end part of the connecting rod assembly (3);

the buckle (62) is rotatably installed in the shell (1) and is suitable for being driven to rotate by the bimetallic strip, and the buckle (62) is clamped at the second end of the jumper bar (61).

10. The circuit breaker according to claim 9, characterized in that said catch (62) comprises:

the lock catch (621) is rotatably arranged on the shell (1) and is suitable for being clamped at the second end of the jumper bar (61);

and the pressing piece (622) is rotatably arranged on the shell (1), one end of the pressing piece is pressed on the lock catch (621), and the pressing piece is suitable for being driven by the bimetallic strip to rotate.

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