A trip mechanism and circuit breaker

Abstract

The application provides a tripping mechanism and a circuit breaker, and belongs to the technical field of low-voltage electrical appliances. The tripping mechanism comprises a tripping part and a locking part which is rotatably connected to a shell through a first rotating shaft. A movable contact and an arc separation plate are rotatably connected to the locking part through the first rotating shaft. The tripping part is rotatably arranged on the movable contact and is buckled with the locking part. A first spring is sleeved on the first rotating shaft. The movable contact and the first spring are driven through the arc separation plate. The arc separation plate pushes the movable contact so that the movable contact and a static contact are in contact or separated. The movable contact and the first spring are indirectly driven through the arc separation plate. The first spring, the arc separation plate and the movable contact are arranged on the first rotating shaft and are installed along the axial direction of the first rotating shaft, so that the occupied space is small, the overall structure of the circuit breaker is compact, and the miniaturization of the circuit breaker is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a tripping mechanism and a circuit breaker. Background Art

[0002] A circuit breaker is a switching device capable of connecting, carrying, and interrupting the rated current of an electrical circuit, and carrying and interrupting the fault current within a specified timeframe. With the continuous development of the power industry, circuit breakers are being widely used, placing increasingly stringent requirements on their design and production, such as intelligence, miniaturization, and extended mechanical life.

[0003] The trip mechanism in a circuit breaker is rotatably connected to the housing. Rotation of the trip mechanism causes the moving contact to engage or separate from the stationary contact, thereby closing or opening the circuit breaker. However, in existing trip mechanisms, the main spring that provides the trip mechanism's reset force and contact pressure is a tension spring. This tension spring is coplanar with the trip mechanism, taking up a lot of space and hindering miniaturization and automated production of circuit breakers. Summary of the Invention

[0004] The purpose of this application is to provide a tripping mechanism and a circuit breaker, in which the arc isolation plate is driven by a first spring, and the arc isolation plate pushes the moving contact to open or close the circuit breaker. The first spring, the arc isolation plate and the moving contact are installed along the axis of the first rotating shaft, occupying a small space, which is conducive to the miniaturization of the circuit breaker.

[0005] The embodiment of the present application is implemented as follows:

[0006] One aspect of an embodiment of the present application provides a tripping mechanism, which includes a jumper and a locking member rotatably connected to a shell via a first rotating shaft, the locking member being rotatably connected to a moving contact and an arc isolation plate via the first rotating shaft, the jumper being rotatably arranged on the moving contact and engaging with the locking member, a first spring being sleeved on the first rotating shaft, the moving contact and the first spring being transmitted via the arc isolation plate, and the arc isolation plate pushing the moving contact to make the moving contact and the static contact contact or separate.

[0007] Optionally, one end of the first spring abuts against the housing, and the other end abuts against the arc isolation plate, so that the arc isolation plate abuts against the moving contact;

[0008] The jumper is connected to the moving contact through a second rotating shaft, and the contact point between the arc isolation plate and the moving contact is located between the first rotating shaft and the second rotating shaft. The first spring is used to move the moving contact to the disconnected position to be close to the housing.

[0009] Optionally, a second spring is sleeved on the first rotating shaft, one end of the second spring is in contact with the locking member, and the locking member is reset by the second spring, and the other end of the second spring is in contact with the arc isolation plate, so that the arc isolation plate is in contact with the moving contact.

[0010] Optionally, the moving contact and the arc isolation plate are driven by gears or shaft surfaces so that the arc isolation plate and the moving contact abut against each other.

[0011] Optionally, the moving contact and the arc isolation plate are driven by gears, and a driving platform protruding from the surface of the arc isolation plate is provided on the arc isolation plate near the first rotating shaft, and a driving surface is formed on the driving platform; a shaft mounting hole is provided on the moving contact, and a gear surface is formed on the hole wall of the shaft mounting hole, and the driving surface and the gear surface cooperate so that the arc isolation plate pushes the moving contact to move.

[0012] Optionally, the moving contact and the arc isolation plate are driven by an axial surface, a driving shaft is provided on the moving contact, and a driving surface is formed on the arc isolation plate; or a driving surface is formed on the moving contact, and a driving shaft is provided on the arc isolation plate, and the arc isolation plate pushes the moving contact to move through the abutment between the driving surface and the driving shaft.

[0013] Optionally, the moving contact and the arc isolation plate are transmitted through an axial hole, a driving shaft is provided on the moving contact, and a driving hole is formed on the arc isolation plate; or a driving hole is formed on the moving contact, and a driving shaft is provided on the arc isolation plate, and the arc isolation plate pushes the moving contact to move through the abutment between the driving shaft and the driving hole.

[0014] Optionally, the handle is connected to the tripping mechanism through a rotating member, and a third spring is provided on the rotating member to reset the rotating member to the disconnected position and drive the handle to reset to the disconnected position, so as to drive the jumper to engage with the locking member after a fault trip.

[0015] Optionally, an arc-shaped partition portion is provided on the arc isolation plate at one end away from the rotating shaft. When the moving contact and the static contact are disconnected, the arc-shaped partition portion is located between the moving contact and the static contact, and is used to block the arc from moving in the opposite direction and make the arc move toward the arc extinguishing chamber.

[0016] Another aspect of an embodiment of the present application provides a circuit breaker, which includes the above-mentioned tripping mechanism.

[0017] The beneficial effects of the embodiments of the present application include:

[0018] The tripping mechanism and circuit breaker provided by the embodiment of the present application are characterized in that the locking member is rotatably connected to the housing via a first rotating shaft, the moving contact and the arc-isolating plate are respectively connected to the first rotating shaft of the locking member, the jumper is rotatably arranged on the moving contact, and the jumper and the locking member are engaged. When the jumper and the locking member are engaged, the arc-isolating plate drives the moving contact and the static contact to contact, thereby achieving closing; when the jumper and the locking member are separated, the arc-isolating plate drives the moving contact and the static contact to separate, thereby achieving opening, and the arc-isolating plate pushes the moving contact to make the moving contact and the static contact contact or separate. A first spring is sleeved on the first rotating shaft, and the moving contact and the first spring are indirectly transmitted via the arc-isolating plate. The first spring, the arc-isolating plate, and the moving contact are all arranged on the first rotating shaft and installed along the axis of the first rotating shaft, occupying little space, making the overall structure of the circuit breaker compact, and facilitating the miniaturization of the circuit breaker.

[0019] The circuit breaker includes the aforementioned tripping mechanism, has stable transmission, and a compact overall structure, making it suitable for miniaturized applications. For example, the circuit breaker can be used in a distribution box, where the circuit breaker is plugged into a busbar, which is disposed in the distribution box, for application in required applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is one of the schematic diagrams of the tripping mechanism structure provided in the embodiment of the present application;

[0022] Figure 2 A schematic diagram of the circuit breaker closed state structure provided in an embodiment of the present application;

[0023] Figure 3 This is the second schematic diagram of the tripping mechanism structure provided in the embodiment of the present application;

[0024] Figure 4 A schematic diagram of the circuit breaker in the open state according to an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the structure of the tripping mechanism provided in an embodiment of the present application being reset to the disconnected position;

[0026] Figure 6 One of the schematic diagrams of the moving contact structure provided in the embodiment of the present application;

[0027] Figure 7 One of the schematic diagrams of the arc isolation plate structure provided in the embodiment of the present application;

[0028] Figure 8 The second schematic diagram of the arc isolation plate structure provided in the embodiment of the present application;

[0029] Figure 9 This is the third schematic diagram of the tripping mechanism structure provided in the embodiment of the present application;

[0030] Figure 10 This is a fourth schematic diagram of the tripping mechanism structure provided in an embodiment of the present application;

[0031] Figure 11 The second schematic diagram of the moving contact structure provided in the embodiment of the present application;

[0032] Figure 12 The third schematic diagram of the arc isolation plate structure provided in the embodiment of the present application;

[0033] Figure 13 This is the fifth structural diagram of the tripping mechanism provided in the embodiment of the present application;

[0034] Figure 14 The fourth schematic diagram of the arc isolation plate structure provided in the embodiment of the present application;

[0035] Figure 15 The third schematic diagram of the moving contact structure provided in the embodiment of the present application;

[0036] Figure 16 The sixth structural diagram of the tripping mechanism provided in the embodiment of the present application;

[0037] Figure 17 The fifth schematic diagram of the arc isolation plate structure provided in the embodiment of the present application;

[0038] Figure 18 The fourth schematic diagram of the structure of the moving contact provided in the embodiment of the present application;

[0039] Figure 19 This is the seventh schematic diagram of the tripping mechanism structure provided in the embodiment of the present application;

[0040] Figure 20 A schematic diagram of the partial structure of a circuit breaker provided in an embodiment of the present application.

[0041] Icons: 100-tripping mechanism; 101-jumping fastener; 102-first rotating shaft; 103-locking fastener; 1031-first tripping end; 1032-second tripping end; 104-arc isolation plate; 1041-driving platform; 1042, 109-driving surface; 1043-arc-shaped isolation plate portion; 1044-axial hole; 1045-second supporting column; 1046-first supporting column; 105-second spring; 106-first spring; 107-second rotating shaft; 1 08-drive shaft; 110-drive hole; 201-housing; 202-electromagnetic release; 203-handle; 204-rotating part; 205-connecting rod; 2041-third spring; 206-moving contact; 2061-shaft mounting hole; 2062-gear surface; 2063-mounting hole; 2064-contact; 2065-welding end; 207-static contact; 208-connecting terminal; 209-thermal release; 210-arc striking plate; 211-arc extinguishing chamber. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0045] The trip mechanism in a circuit breaker is rotatably connected within the circuit breaker housing. Rotation of the trip mechanism causes the moving contact to contact the stationary contact, closing the circuit breaker, or to separate and open the circuit breaker. The moving contact is typically connected to the trip mechanism's bracket via a rotating shaft. A tension spring is mounted on the shaft to reset the moving contact. When the trip mechanism rotates to activate the moving contact, the tension spring provides the reset force and contact pressure. However, the tension spring is coplanar with the trip mechanism, occupying a large space and hindering miniaturization and automated production of circuit breakers.

[0046] To solve the above problems, the present invention provides a tripping mechanism 100. Figure 1 The tripping mechanism 100 provided in the embodiment of the present application includes a tripping member 101 and a locking member 103 rotatably connected to the housing 201 through a first rotating shaft 102. The locking member 103 is rotatably connected to the moving contact 206 and the arc isolation plate 104 through the first rotating shaft 102. The tripping member 101 is rotatably set on the moving contact 206 and engaged with the locking member 103. A first spring 106 is sleeved on the first rotating shaft 102. The moving contact 206 and the first spring 106 are transmitted through the arc isolation plate 104. The arc isolation plate 104 pushes the moving contact 206 to make the moving contact 206 and the static contact 207 contact or separate.

[0047] The locking member 103 is rotatably connected to the housing 201 through the first rotating shaft 102, and the moving contact 206 is provided with a shaft mounting hole 2061. The moving contact 206 is connected to the first rotating shaft 102 of the locking member 103 through the shaft mounting hole 2061. The jumper 101 is rotatably set on the moving contact 206. The locking member 103 and the jumper 101 are buckled and rotatably set on the same side of the moving contact 206; wherein, the locking member 103 is also rotatably connected to the arc isolation plate 104 through the first rotating shaft 102, and a first spring 106 is sleeved on the first rotating shaft 102. The moving contact 206 and the first spring 106 are indirectly transmitted through the arc isolation plate 104, so that the first spring 106 acts on the arc isolation plate 104, and the arc isolation plate 104 is held against the moving contact 206 to push the moving contact 206 to move, and the moving contact 206 and the static contact 207 contact to close or separate. It can be seen that the present application applies force to the moving contact 206 through the arc isolation plate 104 to complete closing or opening, and the first spring 106 acts on the arc isolation plate 104. When the moving contact 206 is subjected to force and driven by the arc isolation plate 104, there is indirect transmission between the moving contact 206 and the first spring 106.

[0048] In summary, in the tripping mechanism 100 provided in the embodiment of the present application, the latch 103 is rotatably connected to the housing 201 via the first rotating shaft 102, the moving contact 206 and the arc isolation plate 104 are respectively connected to the first rotating shaft 102 of the latch 103, the tripping member 101 is rotatably arranged on the moving contact 206, and the tripping member 101 and the latch 103 are buckled. Figure 1 As shown, when the jumper 101 and the locker 103 are fastened together, the arc isolation plate 104 drives the moving contact 206 and the static contact 207 to contact, as shown in FIG. Figure 2 As shown, closing is achieved; Figure 3 As shown, when the jumper 101 and the locker 103 are separated, the arc isolation plate 104 drives the moving contact 206 and the static contact 207 to separate, as shown in FIG. Figure 4As shown, to achieve opening, the arc-isolating plate 104 pushes the movable contact 206, causing it to contact or separate from the stationary contact 207. A first spring 106 is sleeved on the first rotating shaft 102. The arc-isolating plate 104 indirectly transmits power between the movable contact 206 and the second spring 105. The first spring 106, arc-isolating plate 104, and movable contact 206 are all mounted on the first rotating shaft 102 and along its axis, minimizing space consumption and making the overall structure of the circuit breaker compact, which facilitates miniaturization.

[0049] Specifically, one end of the first spring 106 abuts against the housing 201 and the other end abuts against the arc isolation plate 104, so that the arc isolation plate 104 abuts against the moving contact 206; the jumper 101 is connected to the moving contact 206 through the second rotating shaft 107, and the contact point between the arc isolation plate 104 and the moving contact 206 is located between the first rotating shaft 102 and the second rotating shaft 107. The first spring 106 is used to move the moving contact 206 to the disconnected position so as to be close to the housing 201.

[0050] For example, please refer to Figure 1 One end of the first spring 106 abuts against the arc-isolating plate 104, causing the arc-isolating plate 104 to abut against the moving contact 206. The other end of the first spring 106 abuts against the housing 201. Along the height direction of the circuit breaker, the contact point between the arc-isolating plate 104 and the moving contact 206 is between the first rotating shaft 102 and the second rotating shaft 107. When the circuit breaker trips due to a fault, Figure 5 As shown, the first spring 106 can move the movable contact 206 toward the disconnected position, the movable contact 206 and the static contact 207 are separated, the movable contact 206 is close to the housing 201, and the tripping mechanism 100 is reset to the disconnected position.

[0051] In addition, a second spring 105 is sleeved on the first rotating shaft 102. One end of the second spring 105 abuts against the locking member 103, and the locking member 103 is reset by the second spring 105. The other end of the second spring 105 abuts against the arc isolation plate 104, so that the arc isolation plate 104 abuts against the moving contact 206.

[0052] The second spring 105 is sleeved on the first rotating shaft 102, and its two ends respectively abut against the lock member 103 and the arc isolation plate 104. When the second spring 105 abuts against the lock member 103, the lock member 103 can be reset; when the second spring 105 abuts against the arc isolation plate 104, the arc isolation plate 104 can be abutted against the moving contact 206. In other words, the arc isolation plate 104 can push the moving contact 206 to move and contact or separate with the static contact 207.

[0053] When the arc-isolating plate 104 drives the movable contact 206, the movable contact 206 and the arc-isolating plate 104 are abutted against each other through gear transmission, axial surface transmission, or shaft hole transmission. The gear transmission, axial surface transmission, or shaft hole transmission between the movable contact 206 and the arc-isolating plate 104 reduces the relative position and friction between the arc-isolating plate 104 and the movable contact 206, thereby maintaining a constant distance between the two.

[0054] For example, in one possible implementation of the present application, the moving contact 206 and the arc isolation plate 104 are driven by gears; specifically, a driving platform 1041 protruding from the surface of the arc isolation plate 104 is provided on the arc isolation plate 104 near the rotating shaft, and a driving surface 1042 is formed on the driving platform 1041; a shaft mounting hole 2061 is provided on the moving contact 206, and a gear surface 2062 is formed on the hole wall of the shaft mounting hole 2061, and the driving surface 1042 and the gear surface 2062 cooperate to enable the arc isolation plate 104 to push the moving contact 206 to move.

[0055] Please refer to Figure 6 The moving contact 206 is provided with a shaft mounting hole 2061, which is triangular in shape, and a gear surface 2062 is formed on the hole wall below the triangular shaft mounting hole 2061; a mounting hole 2063 is provided in the middle of the moving contact 206 for mounting the tripping member 101; the moving contact 206 is also provided with a welding end 2065 for welding and connecting to one end of the coil of the electromagnetic release 202 through a flexible connecting wire. Please refer to Figure 7 and Figure 8 The arc-isolating plate 104 has a special-shaped structure. An axial hole 1044 is provided at its upper end for mounting the first rotating shaft 102. A protruding driving platform 1041 is provided on the arc-isolating plate 104. The driving platform 1041 is located below the axial hole 1044 and is arranged obliquely. The bottom surface of the driving platform 1041 forms a driving surface 1042. A second abutting post 1045 and a first abutting post 1046 are also provided below the driving platform 1041. The second abutting post 1045 is used to abut the second spring 105, while the first abutting post 1046 is used to abut the first spring 106. The end of the first spring 106 abuts against the first abutting post 1046. The driving surface 1042 cooperates with the gear surface 2062, enabling the arc-isolating plate 104 to push the moving contact 206, causing the contact 2064 of the moving contact 206 to contact or separate from the stationary contact 207. The driving surface 1042 can be understood as another form of gear mating surface, which cooperates with the gear surface 2062 of the moving contact 206 to form a gear transmission.

[0056] In another achievable method of the present application, the moving contact 206 and the arc isolation plate 104 are driven by an axial surface; specifically, a driving shaft 108 is provided on the moving contact 206, and a driving surface 109 is formed on the arc isolation plate 104; or, a driving surface 109 is formed on the moving contact 206, and a driving shaft 108 is provided on the arc isolation plate 104, and the driving surface 109 and the driving shaft 108 are supported by the arc isolation plate 104 to push the moving contact 206 to move.

[0057] The arc isolation plate 104 and the moving contact 206 drive part are in axial contact. In one case, please refer to Figure 11 The drive shaft 108 is provided on the moving contact 206. The drive shaft 108 and the moving contact 206 can be provided as an integral unit, or the drive shaft 108 can be riveted to the moving contact 206. The shaft mounting hole 2061 on the moving contact 206 is arc-shaped. Figure 12 The side wall of the middle arc plate 104 serves as the driving surface 109. Figure 9 and Figure 10 As shown, the driving shaft 108 is pushed by the driving surface 109 so that the arc isolation plate 104 drives the moving contact 206 .

[0058] Another situation is that Figure 14 As shown, the drive shaft 108 is disposed on the arc isolation plate 104. The drive shaft 108 and the arc isolation plate 104 can be integrally disposed, or the drive shaft 108 can be riveted to the arc isolation plate 104. Figure 15 The side wall of the moving contact 206 serves as the driving surface 109. Figure 13 As shown, the driving surface 109 is pushed by the driving shaft 108 so that the arc isolation plate 104 drives the moving contact 206 .

[0059] In the third possible implementation of the present application, Figure 16 As shown, the arc isolation plate 104 and the moving contact 206 are in contact with each other at the driving position of the shaft hole, as shown in FIG. Figure 17 As shown, the drive shaft 108 is provided on the arc isolation plate 104. The drive shaft 108 and the arc isolation plate 104 can be provided in an integrated manner, or the drive shaft 108 can be riveted to the arc isolation plate 104. Figure 14 The difference between the middle drive shaft 108 and the arc isolation plate 104 is that Figure 17 The middle drive shaft 108 is located at the edge of the arc isolation plate 104; Figure 18 The middle moving contact 206 is provided with Figure 17 The driving shaft 108 cooperates with the driving hole 110 , and the driving hole 110 is located in the middle of the moving contact 206 . Through the cooperation between the driving hole 110 and the driving shaft 108 , the arc isolation plate 104 drives the moving contact 206 .

[0060] Another possible situation is (not shown in the figure) that the drive shaft 108 is arranged on the moving contact 206, the drive shaft 108 and the moving contact 206 can be arranged as an integral whole, or the drive shaft 108 is riveted to the moving contact 206; the drive hole 110 is arranged on the arc isolation plate 104 to cooperate with the drive shaft 108 on the moving contact 206, so that the arc isolation plate 104 drives the moving contact 206.

[0061] The abutment position between the arc-isolating plate 104 and the moving contact 206, that is, the driving contact point, is located between the first rotating shaft 102 of the locking member 103 and the second rotating shaft 107 of the jumping member 101. In other words, the abutment position between the driving surface 109 and the driving shaft 108, or the abutment position between the driving shaft 108 and the driving hole 110, is located between the first rotating shaft 102 and the second rotating shaft 107.

[0062] Please refer to Figure 19 In addition to pushing the moving contact 206 to close or open the circuit breaker, the arc isolation plate 104 is provided with an arc-shaped partition portion 1043 on the end away from the rotating shaft. When the moving contact 206 and the static contact 207 are disconnected, the arc-shaped partition portion 1043 is located between the moving contact 206 and the static contact 207, and is used to prevent the arc from moving in the opposite direction, so that the arc moves toward the arc extinguishing chamber 211.

[0063] An arc-shaped partition portion 1043 is formed at the bottom of the arc isolation plate 104. When the moving contact 206 and the static contact 207 are disconnected, the moving contact 206 moves to a position where the arc-shaped partition portion 1043 is located between the moving contact 206 and the static contact 207 to prevent the arc or airflow from moving in the opposite direction, so that the arc quickly enters the arc extinguishing chamber 211, thereby improving the arc extinguishing capability.

[0064] The tripping mechanism 100 is operated by a handle 203. The handle 203 is connected to the tripping mechanism 100 via a rotating member 204. A third spring 2041 is sleeved on the rotating member 204 to reset the rotating member 204 to the disconnected position, thereby driving the handle 203 to reset to the disconnected position, thereby driving the tripping member 101 to engage with the locking member 103 after a fault trip.

[0065] For example, the rotating member 204 is rotatably arranged in the housing 201, and the tripper 101 is provided with two shaft holes, one shaft hole is used to set the second rotating shaft 107 rotatably connected to the moving contact 206, and the other shaft hole is used to set the connecting rod 205. The connecting rod 205 is also connected to the rotating member 204. The rotating member 204 and the handle 203 can be connected through a gear or a connecting rod, so that the handle 203 drives the moving contact 206 to move through the rotating member 204 and the connecting rod 205 to contact or separate with the static contact 207. Figure 20 As shown, the tripping mechanism 100 , the connecting rod 205 and the rotating member 204 all belong to the operating mechanism, and the operating mechanism and the housing 201 form a four-bar linkage mechanism.

[0066] When the handle 203 drives the moving contact 206 and the static contact 207 to contact or separate through the rotating member 204, the third spring 2041 sleeved on the rotating member 204 can reset the rotating member 204 to the disconnected position. When the rotating member 204 is reset, the handle 203 is also reset. When the circuit breaker fails and trips, the tripping member 101 and the locking member 103 are released from the fastening state, and the handle 203 is reset to drive the tripping member 101 and the locking member 103 to re-fasten.

[0067] On the other hand, an embodiment of the present application further provides a circuit breaker, comprising the aforementioned tripping mechanism 100 .

[0068] The circuit breaker also includes an electromagnetic release 202. The front of the top rod of the electromagnetic release 202 is the first tripping end 1031 of the locking member 103. When a short-circuit current is generated in the circuit, the electromagnetic release 202 is actuated, driving the locking member 103 of the tripping mechanism 100 to actuate, releasing the engagement between the locking member 103 and the tripping member 101. The tripping mechanism 100 is reset under the action of the first spring 106, and the circuit is disconnected; the second tripping end 1032 of the locking member 103 is arranged in front of the movable end of the thermal release 209. When an overcurrent occurs in the circuit, the thermal release 209 drives the locking member 103 to actuate, and the circuit breaker is disconnected.

[0069] The electromagnetic release 202 is horizontally mounted below the handle 203. One end of its coil is connected to the side of the moving contact 206 (welding end 2065) away from the contact point via a flexible connecting wire. The operating mechanism is located on the right side of the electromagnetic release 202. The thermal release 209 is horizontally mounted below the electromagnetic release 202. When an overcurrent occurs in the circuit, the thermal release 209 actuates the locking member 103. One end of the thermal release 209 is connected to the terminal 208 via a wire, and the other end is connected to the coil of the electromagnetic release 202. The arc extinguishing chamber 211 is located below the thermal release 209, with two terminal blocks 208 positioned opposite each other on either side of the arc extinguishing chamber 211. The bracket of the thermal release 209 is integrally mounted with the arc striking plate 210 of the arc extinguishing chamber 211. The inlet of the arc extinguishing chamber 211 is opposite the moving contact 206 and the static contact 207. The air outlet of the arc extinguishing chamber 211 faces the terminal block 208 and is electrically insulated from the terminal block 208.

[0070] The circuit breaker provided in the embodiments of the present application, through the layout of the aforementioned components, has a compact overall structure and is adaptable to miniaturized applications. For example, the circuit breaker can be used in a distribution box, where the circuit breaker is plugged into a busbar, which is then installed in the distribution box, for application in desired applications.

[0071] The circuit breaker includes the same structure and benefits as the trip mechanism 100 in the aforementioned embodiment. The structure and benefits of the trip mechanism 100 have been described in detail in the aforementioned embodiment and will not be repeated here.

[0072] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A tripping mechanism (100), characterized in that: The invention comprises a jumper (101) and a locker (103) rotatably connected to a housing (201) via a first rotating shaft (102); the locker (103) is rotatably connected to a moving contact (206) and an arc isolation plate (104) via the first rotating shaft (102); the jumper (101) is rotatably arranged on the moving contact (206) and is engaged with the locker (103); a first spring (106) is sleeved on the first rotating shaft (102); the moving contact (206) and the first spring (106) are connected via the arc isolation plate ( 104) transmission, the arc isolation plate (104) pushes the moving contact (206) to make the moving contact (206) and the static contact (207) contact or separate; an arc-shaped isolation plate portion (1043) is provided on the arc isolation plate (104) at one end away from the first rotating shaft (102), and when the moving contact (206) and the static contact (207) are disconnected, the arc-shaped isolation plate portion (1043) is located between the moving contact (206) and the static contact (207) to block the arc from moving in the reverse direction and make the arc move toward the arc extinguishing chamber (211).

2. The tripping mechanism (100) according to claim 1, characterized in that: One end of the first spring (106) abuts against the housing (201), and the other end abuts against the arc isolation plate (104), so that the arc isolation plate (104) abuts against the moving contact (206); The jumper (101) is connected to the moving contact (206) via a second rotating shaft (107); the contact point between the arc isolation plate (104) and the moving contact (206) is located between the first rotating shaft (102) and the second rotating shaft (107); the first spring (106) is used to move the moving contact (206) toward the disconnected position so as to be close to the housing (201).

3. The tripping mechanism (100) according to claim 2, characterized in that: A second spring (105) is sleeved on the first rotating shaft (102), one end of the second spring (105) abuts against the locking member (103), and the locking member (103) is reset by the second spring (105), and the other end of the second spring (105) abuts against the arc isolation plate (104), so that the arc isolation plate (104) abuts against the moving contact (206); The moving contact (206) and the arc isolation plate (104) are driven by gears, shaft surfaces or shaft holes, so that the arc isolation plate (104) and the moving contact (206) are in contact with each other.

4. The tripping mechanism (100) according to claim 3, characterized in that: The moving contact (206) and the arc isolation plate (104) are driven by gears. A driving platform (1041) protruding from the surface of the arc isolation plate (104) is provided on the arc isolation plate (104) near the first rotating shaft (102), and a driving surface (1042) is formed on the driving platform (1041); a shaft mounting hole (2061) is provided on the moving contact (206), and a gear surface (2062) is formed on the hole wall of the shaft mounting hole (2061). The driving surface (1042) and the gear surface (2062) cooperate to enable the arc isolation plate (104) to push the moving contact (206) to move.

5. The tripping mechanism (100) according to claim 3, characterized in that: The moving contact (206) and the arc isolation plate (104) are driven by an axial surface, a driving shaft (108) is provided on the moving contact (206), and a driving surface (109) is formed on the arc isolation plate (104); or, a driving surface (109) is formed on the moving contact (206), and a driving shaft (108) is provided on the arc isolation plate (104), and the arc isolation plate (104) pushes the moving contact (206) to move through the contact between the driving surface (109) and the driving shaft (108).

6. The tripping mechanism (100) according to claim 5, characterized in that: The moving contact (206) and the arc isolation plate (104) are driven through a shaft hole, a driving shaft (108) is provided on the moving contact (206), and a driving hole (110) is formed on the arc isolation plate (104); or, a driving hole (110) is formed on the moving contact (206), and a driving shaft (108) is provided on the arc isolation plate (104), and the arc isolation plate (104) pushes the moving contact (206) to move through the contact between the driving shaft (108) and the driving hole (110).

7. The tripping mechanism (100) according to claim 1, characterized in that: The handle (203) is connected to the tripping mechanism (100) via a rotating member (204); a third spring (2041) is sleeved on the rotating member (204) to reset the rotating member (204) to the disconnected position and drive the handle (203) to reset to the disconnected position, thereby driving the tripping member (101) to engage with the locking member (103) after a fault trip.

8. A circuit breaker (200), characterized in that: It comprises a tripping mechanism (100) as claimed in any one of claims 1 to 7.

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