CN212365872U - Circuit breaker - Google Patents

Abstract

The utility model discloses a circuit breaker relates to the electrical technology field. Including the casing, and set up operating assembly in the casing, the casing includes relative first lateral wall and the second lateral wall that sets up, operating assembly with first lateral wall is connected, operating assembly with preset space has between the second lateral wall, be used for setting up at least one of circuit board, bimetallic strip or dropout driving medium in the preset space. The layout structure of the circuit breaker can be optimized, the size of the circuit breaker is reduced, and the applicability of the circuit breaker is further improved.

Description

Circuit breaker

Technical Field

The utility model relates to an electrical technology field particularly, relates to a circuit breaker.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breaker can protect a power line, a load and the like, can automatically cut off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, has a function equivalent to the combination of a fuse type switch, an over-under-heat relay and the like, does not generally need to change parts after breaking fault current, and is widely applied at present.

The on-off of the circuit breaker generally controls the movement of the moving contact through the operating mechanism so as to separate or support the moving contact and the fixed contact, thereby realizing the opening or closing of the circuit breaker. The operating mechanism of the existing circuit breaker has many parts, the connecting structure between the parts is complex, the operating mechanism is driven by the shell, and when necessary devices such as an arc extinguishing assembly and a tripping assembly are added in the circuit breaker, the circuit breaker is large in body, the internal space of the electric control cabinet is limited, and the use of the circuit breaker is limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a circuit breaker can optimize the layout structure of circuit breaker, reduces the volume of circuit breaker, and then promotes the suitability of circuit breaker.

The embodiment of the utility model is realized like this:

the utility model provides a circuit breaker, includes the casing, and sets up operating assembly in the casing, the casing is including relative first lateral wall and the second lateral wall that sets up, operating assembly with first lateral wall is connected, operating assembly with preset space has between the second lateral wall, be used for setting up at least one of circuit board, bimetallic strip or dropout driving medium in the preset space.

Optionally, the operating assembly includes a support frame, a torsion member, a linkage assembly, and a moving contact, the first hinge portion of the torsion member is hinged to the support frame, and the torsion member is connected to the moving contact through the linkage assembly, so that the moving contact is connected to or disconnected from the stationary contact.

Optionally, the linkage assembly includes first connecting piece, swing piece, second connecting piece and third connecting piece, the first end of first connecting piece with the second articulated portion of torsion piece is articulated, the second end of first connecting piece with the first end of second connecting piece is connected through first pivot rotation, the second end of second connecting piece with the first end of third connecting piece is connected through rotation, the third connecting piece with the moving contact all through the second pivot with the support frame is connected through rotation, just the third connecting piece can with the moving contact joint when rotating, swing piece is including supporting the body, and sets up hinge hole and slotted hole on the supporting body, swing piece passes through the hinge hole the support frame is rotated and is connected, first pivot pass through the slotted hole, and with slotted hole sliding connection.

Optionally, the moving contact includes a rotating portion and a contact portion connected to the rotating portion, the rotating portion includes a first hinge wall connected to the contact portion, and a support arm connected to the first hinge wall, and the third connecting member is correspondingly provided with a limit groove, so that the support arm abuts against an inner wall of the limit groove.

Optionally, the rotating portion further includes a second hinge wall, the second hinge wall is disposed in parallel with the first hinge wall, and the first hinge wall is connected to the second hinge wall through the supporting arm.

Optionally, the operating assembly further comprises an elastic member, one end of the elastic member is connected with the mounting portion on the supporting frame, and the other end of the elastic member is connected with the second end of the third connecting member, so that the second end of the third connecting member has a tendency of rotating towards the mounting portion.

Optionally, the operation subassembly still includes the locking piece, the locking piece includes the swinging boom, the one end of swinging boom pass through the third pivot with the support frame rotates to be connected, be provided with the hasp on the swinging boom, it is provided with joint portion to correspond on the swinging member, be provided with first torsional spring in the third pivot, the first torsion arm of first torsional spring with the support frame supports and holds, the second torsion arm of first torsional spring with the swinging boom supports and holds, so that the hasp with joint portion locking.

Optionally, the circuit breaker is still including setting up tripping assembly in the casing, tripping assembly include the electromagnetism main part, and with electromagnetism main part complex armature, correspond on the swinging boom and set up the part of unblocking, armature with when the electromagnetism main part lock, can drive the setting and be in operation subassembly with between the second lateral wall tripping transmission spare collision the part of unblocking, so that the hasp with the locking is removed to the joint portion.

Optionally, the circuit breaker still includes the handle, the handle pass through the connecting rod with the torsion piece is connected, the first articulated portion of torsion piece pass through the fourth pivot with the support frame is articulated, be provided with the second torsional spring in the fourth pivot, the first end of second torsional spring with the support frame supports and holds, the second end of second torsional spring with the torsion piece supports and holds.

Optionally, a bimetallic strip is arranged in the preset space, one end of the bimetallic strip is connected with a signal terminal of the circuit breaker, and the other end of the bimetallic strip is connected with the moving contact through a fixed contact.

The utility model discloses beneficial effect includes:

the embodiment of the utility model provides a circuit breaker, through setting up the operating assembly in the casing, this operating assembly is connected with the first side wall of casing, can optimize the layout structure of circuit breaker, need not to depend on each spare part of operating assembly again and assembles with the casing. A preset space is arranged between the operating assembly and the second side wall, and other parts of the circuit breaker, such as a circuit board, a bimetallic strip or a tripping transmission part, can be arranged in the preset space. Avoid other subassemblies to set up side by side with the operation subassembly, the inner space structure that can make full use of circuit breaker reduces the volume of circuit breaker, and then promotes the suitability of circuit breaker.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic view of a positional relationship between the operating assembly and the housing according to the embodiment of the present invention;

fig. 3 is a schematic structural diagram of an operating assembly according to an embodiment of the present invention;

fig. 4 is a second schematic structural diagram of an operating assembly according to an embodiment of the present invention;

fig. 5 is a third schematic structural diagram of an operating assembly according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a torsion member according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a swinging member according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a movable contact according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a third connecting member according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a locking member according to an embodiment of the present invention.

Icon: 100-a circuit breaker; 105-a stationary contact; 110-a housing; 112-a first side wall; 114-a second side wall; 116-a preset space; 120-an operating component; 121-a support frame; 1212-a mounting portion; 123-a torsion element; 1232-a first hinge; 1234-a second hinge; 1236-fourth shaft; 125-a linkage assembly; 1252-first connector; 1253-a first shaft; 1254-a pendulum; 1254 a-a support body; 1254 b-hinge hole; 1254 c-slotted hole; 1254 d-snap-fit portion; 1256-second connector; 1258-third connector; 1258 a-limit groove; 1259-a second spindle; 127-moving contact; 1272-a rotating part; 1274-contact; 1276-a first hinged wall; 1277-a support arm; 1278-a second hinged wall; 128-a resilient member; 129-a lock; 1292-a third shaft; 1294-a rotating arm; 1296-locking buckle; 1298-unlocking; 130-a first torsion spring; 140-a trip assembly; 142-an electromagnetic body; 144-an armature; 146-a trip transmission; 150-a handle; 152-a connecting rod; 160-bimetallic strip.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 and 2, the present embodiment provides a circuit breaker 100, which includes a housing 110, and an operating assembly 120 disposed in the housing 110, where the housing 110 includes a first side wall 112 and a second side wall 114 disposed opposite to each other, the operating assembly 120 is connected to the first side wall 112, a predetermined space 116 is formed between the operating assembly 120 and the second side wall 114, and at least one of a circuit board, a bimetal 160, and a trip transmission member 146 is disposed in the predetermined space 116.

Specifically, the operating assembly 120 and the housing 110 can be directly aligned and installed, and there is no direct transmission connection relationship between the operating assembly 120 and the housing 110, and in this way, the lateral space inside the housing 110, that is, the predetermined space 116 between the operating assembly 120 and the second side wall 114 can be saved. Other components of the circuit breaker 100 that are disposed alongside the operating component 120 may be disposed within this predetermined space 116, which is beneficial to reducing the length of the circuit breaker 100, so that the circuit breaker 100 is miniaturized overall.

The embodiment of the utility model provides a circuit breaker 100, through the operating assembly 120 who sets up in casing 110, this operating assembly 120 is connected with the first lateral wall 112 of casing 110, can optimize circuit breaker 100's layout structure, need not to depend on each spare part of operating assembly 120 again and assembles with casing 110. The operating assembly 120 and the second side wall 114 define a predetermined space 116 therebetween, and the predetermined space 116 may house other components of the circuit breaker 100 such as a circuit board, a bimetal 160, or a trip actuator 146. Avoid other subassemblies to set up side by side with operation subassembly 120, can make full use of circuit breaker 100's inner space structure, reduce circuit breaker 100's volume, and then promote circuit breaker 100's suitability.

As shown in fig. 3 and 6, the operating assembly 120 includes a supporting frame 121, a torsion element 123, a linkage assembly 125 and a movable contact 127, wherein a first hinge 1232 of the torsion element 123 is hinged to the supporting frame 121, and the torsion element 123 is connected to the movable contact 127 through the linkage assembly 125, so as to connect or disconnect the movable contact 127 and the stationary contact 105.

Specifically, the operating assembly 120 is fixedly connected to the housing 110 through the supporting frame 121, and the torsion element 123, the linkage assembly 125 and the moving contact 127 of the operating assembly 120 are all in positioning transmission with the supporting frame 121, so that there is no direct relationship between the housings 110, and the complete function of the mechanism can be realized without depending on the housings 110. The static contact 105 is a conductor fixed in the housing 110, and is used for connecting with a terminal of the circuit breaker 100, does not participate in transmission of opening or closing, and may not be used as a part in the operating assembly 120, as long as the operating assembly 120 and the housing 110 are aligned and mounted, and then can be normally matched with the static contact 105. The first hinge 1232 of the torsion element 123 is hinged to the supporting frame 121, and the moving contact 127 is driven to move by the forward or reverse rotation of the torsion element 123, so that the moving contact 127 can realize the required state switching.

As shown in fig. 3, 4 and 6, the linkage assembly 125 includes a first link 1252, a swing member 1254, a second link 1256 and a third link 1258, a first end of the first link 1252 is hinged to the second hinge portion 1234 of the torsion member 123, a second end of the first link 1252 is rotatably connected to a first end of the second link 1256 by a first rotating shaft 1253, a second end of the second link 1256 is rotatably connected to a first end of the third link 1258, the third link 1258 and the movable contact 127 are rotatably connected to the support frame 121 by a second rotating shaft 1259, as shown in fig. 7, the swing member 1254 includes a support body 1254a, and hinge holes 1254b and 1254c provided on the support body 1254a, the swing member 1254 is rotatably connected to the support frame 121 by a hinge hole 1254b, and the first rotating shaft 1253 passes through the slot 1254c and is slidably connected to the slot 1254 c.

Specifically, as shown in fig. 4, when the torsion element 123 rotates counterclockwise, the second hinge portion 1234 of the torsion element 123 has a tendency to move rightward, which drives the first end of the first link 1252 to move rightward, so as to drive the second end of the first link 1252 to move rightward, the second end of the first link 1252 is rotatably connected to the first end of the second link 1256 via the first rotating shaft 1253, and when the second end of the first link 1252 moves rightward, the first end of the second link 1256 and the first rotating shaft 1253 are driven to move rightward synchronously. The second end of the second connecting member 1256 is rotatably connected to the first end of the third connecting member 1258, when the first end of the second connecting member 1256 moves along the slot 1254c, the second end of the second connecting member 1256 is shifted to drive the third connecting member 1258 to rotate along the second rotating shaft 1259 and the supporting frame 121, and when the third connecting member 1258 rotates, the second end of the second connecting member 1256 is engaged with the movable contact 127, so that the movable contact 127 is in contact with the stationary contact 105 (as shown in fig. 5).

As shown in fig. 8 and 9, the movable contact 127 includes a rotating portion 1272 and a contact portion 1274 connected to the rotating portion 1272, the rotating portion 1272 includes a first hinge wall 1276 connected to the contact portion 1274 and a support arm 1277 connected to the first hinge wall 1276, and the third connecting member 1258 is correspondingly provided with a limit groove 1258a, so that the support arm 1277 abuts against an inner wall of the limit groove 1258 a.

Specifically, first hinged wall 1276 is pivotally connected to second pivot shaft 1259, and support arm 1277 is at a predetermined angle, preferably 90 °, to first hinged wall 1276. The contact portion 1274 may be disposed in a region where the predetermined space 116 between the operating member 120 and the second side wall 114 is located, and the support arm 1277 extends toward the operating member 120 so that the stopper groove 1258a of the third connector 1258 abuts against the support arm 1277. In addition, a torsion spring or a spring plate may be disposed on the second rotating shaft 1259 to stably support the support arm 1277 and the third connecting member 1258. Thus, the over travel of the moving contact 127 can be realized, so that the moving contact 127 and the fixed contact 105 are stably supported, and the stability of the electrical connection is ensured.

As shown in fig. 8, the rotating portion 1272 further includes a second hinge wall 1278, the second hinge wall 1278 is disposed in parallel with the first hinge wall 1276, and the first hinge wall 1276 and the second hinge wall 1278 are connected by a support arm 1277.

Specifically, the first hinge wall 1276 and the second hinge wall 1278 together form the rotation portion 1272, and the first hinge wall 1276 and the second hinge wall 1278 are connected by the support arm 1277, so that the phase position between the first hinge wall 1276 and the second hinge wall 1278 is stabilized. Meanwhile, the first hinge wall 1276 and the second hinge are rotatably connected with the second rotating shaft 1259, so that multi-support can be realized, and the rotation of the movable contact 127 is more stable and reliable.

As shown in fig. 4 and 9, the operating assembly 120 further includes an elastic member 128, one end of the elastic member 128 is connected to the mounting portion 1212 of the supporting frame 121, and the other end is connected to the second end of the third connecting member 1258, so that the second end of the third connecting member 1258 has a tendency to rotate toward the mounting portion 1212.

Specifically, the elastic member 128 may be an elastic string or a tension spring, etc., as long as it can provide the required elastic force, so that the second end of the third connecting member 1258 has a tendency to rotate toward the mounting portion 1212. Therefore, a certain restoring force can be provided when the moving contact 127 is far away from the moving contact 127, which is beneficial to ensuring the reliability of the separation of the moving contact 127 and the fixed contact 105. In addition, the embodiment of the present invention does not specifically limit the installation form of the installation portion 1212 as long as the installation portion can be stably connected to one end of the elastic member 128. For example, the mounting portion 1212 may be configured as a positioning shaft, a positioning boss, or a snap fit, to meet the desired connection requirements.

As shown in fig. 5 and 10, the operating assembly 120 further includes a locking member 129, the locking member 129 includes a rotating arm 1294, one end of the rotating arm 1294 is rotatably connected to the supporting frame 121 through a third rotating shaft 1292, a lock catch 1296 is disposed on the rotating arm 1294, a clamping portion 1254d is correspondingly disposed on the swinging member 1254, a first torsion spring 130 is disposed on the third rotating shaft 1292, a first torsion arm of the first torsion spring 130 abuts against the supporting frame 121, and a second torsion arm of the first torsion spring 130 abuts against the rotating arm 1294, so that the lock catch 1296 is locked with the clamping portion 1254 d.

Specifically, when the movable contact 127 is separated from the stationary contact 105, the locking member 129 is acted by the elastic force of the first torsion spring 130, so that the latch 1296 is locked with the clamping portion 1254d, and when the torsion member 123 rotates to connect the movable contact 127 and the stationary contact 105, the latch 1296 and the clamping portion 1254d are always in a locked state (as shown in fig. 4 and 5). When the latch 1296 and the clamping portion 1254d are unlocked, the stable state between the linkage assembly 125 and the movable contact 127 is broken, and the movable contact 127 is separated from the fixed contact 105 under the action of the elastic member 128.

As shown in fig. 1, 5 and 10, the circuit breaker 100 further includes a trip assembly 140 disposed in the housing 110, the trip assembly 140 includes an electromagnetic body 142, and an armature 144 cooperating with the electromagnetic body 142, and an unlocking portion 1298 is correspondingly disposed on the rotating arm 1294, and when the armature 144 is fastened to the electromagnetic body 142, the trip transmission member 146 disposed between the operating assembly 120 and the second side wall 114 can be driven to collide with the unlocking portion 1298, so that the latch 1296 and the latch 1254d are unlocked.

Specifically, the electromagnetic body 142 is connected in series with the circuit of the circuit breaker 100, and when the circuit in the series circuit is too large, the magnetic force generated by the electromagnetic body 142 is greater than the resistance (e.g., elastic force) applied to the armature 144 itself, so that the armature 144 approaches the electromagnetic body 142. During the approaching process, the armature 144 drives the trip rotation element to move, so that the trip transmission element 146 collides with the unlocking portion 1298, thereby unlocking the latch 1296 from the snap-fit portion 1254 d. After the latch 1296 and the clamping portion 1254d are unlocked, the movable contact 127 is separated from the fixed contact 105, the operating assembly 120 returns to the state shown in fig. 4, and at this time, the torsion member 123 can drive the linkage assembly 125 to move, so that the movable contact 127 and the fixed contact 105 are communicated again.

The unlocking portion 1298 of the rotating arm 1294 can be a rod-shaped or bar-shaped protrusion, and extends toward the preset space 116, and when the trip rotating member in the preset space moves under the driving of the armature 144, it can cooperate with the trip transmission member 146 to unlock the lock buckle 1296 from the clamping portion 1254 d.

As shown in fig. 1 and 4, the circuit breaker 100 further includes a handle 150, the handle 150 is connected to the torsion element 123 through a connecting rod 152, the first hinge portion 1232 of the torsion element 123 is hinged to the supporting frame 121 through a fourth rotating shaft 1236, the fourth rotating shaft 1236 is provided with a second torsion spring, a first end portion of the second torsion spring abuts against the supporting frame 121, and a second end portion of the second torsion spring abuts against the torsion element 123.

Specifically, when the circuit breaker 100 is switched on by manual operation, the handle 150 may be pushed, and since the handle 150 is connected to the torsion element 123 through the connecting rod 152, the torsion element 123 may be driven to rotate around the fourth rotating shaft 1236 when the handle 150 is pushed, and the linkage assembly 125 may be driven to move when the torsion element 123 rotates, so as to switch on the circuit breaker through the linkage assembly 125. When the brake is opened, the brake can be in the form of a pulling handle 150, and the brake opening operation can be realized through the tripping assembly 140 when the tripping assembly 140 is triggered to act. During the opening process, the elastic element 128 drives the third connecting element 1258 to move, so as to separate the moving contact 127 from the stationary contact 105. When the moving contact 127 is separated from the fixed contact 105, because the first end of the second torsion spring abuts against the support frame 121 and the second end of the second torsion spring abuts against the torsion element 123, the torsion element 123 tends to move away from the linkage assembly 125, and the handle 150 can be reset to the state when the circuit breaker 100 is opened by virtue of the elastic force of the second torsion spring.

As shown in fig. 1, a bimetal 160 is disposed in the predetermined space 116, one end of the bimetal 160 is connected to the signal terminal of the circuit breaker 100, and the other end is connected to the movable contact 127 through a fixed contact.

Specifically, the bi-metallic strip 160 is a composite material composed of two or more metals or other materials having suitable properties. Because the thermal expansion coefficients of the component layers are different, when the temperature changes, the deformation of the active layer is larger than that of the passive layer, so that the whole bimetallic strip 160 bends towards one side of the passive layer, and the curvature of the composite material changes, thereby generating deformation. One end of the bimetal 160 is connected to the signal terminal of the circuit breaker 100, and the other end of the bimetal is connected to the movable contact 127 through the fixed contact, so that a connection path can be formed normally when the circuit breaker 100 is closed, and when a circuit is overloaded or the temperature of the circuit breaker 100 is too high, the bimetal 160 is disconnected from the fixed contact through the deformation of the bimetal 160, thereby protecting the circuit breaker 100.

In this embodiment, in order to ensure the stability of the transmission of the linkage assembly 125, a limiting part such as a limiting pin or a limiting protrusion may be further disposed on the supporting frame 121. For example, a position of the limiting portion may be set according to an effective movement space of the first connecting member 1252 or the swinging member 1254, and when the simultaneous limiting cannot be ensured, a protrusion may be added or a notch may be set at a suitable position on the first connecting member 1252 or the swinging member 1254 to achieve the required limiting, which is not limited in particular herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a circuit breaker, its characterized in that includes the casing, and sets up operating assembly in the casing, the casing is including relative first lateral wall and the second lateral wall that sets up, operating assembly with first lateral wall is connected, operating assembly with preset space has between the second lateral wall, be used for setting up at least one of circuit board, bimetallic strip or dropout driving medium in the preset space.

2. The circuit breaker of claim 1, wherein the operating assembly comprises a support frame, a torsion member, a linkage assembly and a moving contact, wherein a first hinge portion of the torsion member is hinged to the support frame, and the torsion member is connected to the moving contact through the linkage assembly, so that the moving contact is connected to or disconnected from the stationary contact.

3. The circuit breaker according to claim 2, wherein the linkage assembly comprises a first connecting member, a swinging member, a second connecting member and a third connecting member, a first end of the first connecting member is hinged to the second hinge portion of the torsion member, a second end of the first connecting member is rotatably connected to a first end of the second connecting member via a first rotating shaft, a second end of the second connecting member is rotatably connected to a first end of the third connecting member, the third connecting member and the moving contact are both rotatably connected to the supporting frame via a second rotating shaft, and the third connecting member can be engaged with the moving contact when rotating, the swinging member comprises a supporting body, a hinge hole and a slot hole formed on the supporting body, the swinging member is rotatably connected to the supporting frame via the hinge hole, and the first rotating shaft passes through the slot hole, and is connected with the slotted hole in a sliding way.

4. The circuit breaker according to claim 3, wherein the movable contact includes a rotating portion and a contact portion connected to the rotating portion, the rotating portion includes a first hinge wall connected to the contact portion, and a support arm connected to the first hinge wall, and the third connecting member is correspondingly provided with a limit groove, so that the support arm abuts against an inner wall of the limit groove.

5. The circuit breaker according to claim 4, wherein the rotating portion further comprises a second hinge wall, the second hinge wall is disposed in parallel with the first hinge wall, and the first hinge wall and the second hinge wall are connected by the supporting arm.

6. The circuit breaker of any one of claims 3-5, wherein the operating assembly further comprises a resilient member, one end of the resilient member being connected to the mounting portion of the support frame and the other end of the resilient member being connected to the second end of the third link member, such that the second end of the third link member has a tendency to rotate toward the mounting portion.

7. The circuit breaker according to any one of claims 3-5, wherein the operating assembly further comprises a locking member, the locking member comprises a rotating arm, one end of the rotating arm is rotatably connected with the supporting frame through a third rotating shaft, a lock catch is arranged on the rotating arm, a clamping portion is correspondingly arranged on the swinging member, a first torsion spring is arranged on the third rotating shaft, a first torsion arm of the first torsion spring abuts against the supporting frame, and a second torsion arm of the first torsion spring abuts against the rotating arm, so that the lock catch and the clamping portion are locked.

8. The circuit breaker of claim 7, further comprising a trip assembly disposed in the housing, wherein the trip assembly comprises an electromagnetic body and an armature cooperating with the electromagnetic body, an unlocking portion is correspondingly disposed on the rotary arm, and when the armature is fastened to the electromagnetic body, the armature can drive the trip transmission member disposed between the operating assembly and the second side wall to collide with the unlocking portion, so that the latch and the clamping portion are unlocked.

9. The circuit breaker according to any one of claims 2-5, further comprising a handle, wherein the handle is connected to the torsion member through a connecting rod, the first hinge portion of the torsion member is hinged to the support frame through a fourth rotating shaft, a second torsion spring is disposed on the fourth rotating shaft, a first end portion of the second torsion spring abuts against the support frame, and a second end portion of the second torsion spring abuts against the torsion member.

10. The circuit breaker according to any one of claims 2 to 5, wherein a bimetal is disposed in the predetermined space, one end of the bimetal is connected to a signal terminal of the circuit breaker, and the other end of the bimetal is connected to the movable contact through a fixed contact.

Images