Opening and closing structure and load switch with same

Abstract

The utility model provides a kind of opening and closing structure and load switch with it, including opening and closing subassembly, reset piece, clutch cam piece and drive assembly;Opening and closing subassembly includes movable contact, static contact, drive assembly includes drive protrusion, opening and closing cam piece is set with opening and closing slot, opening and closing slot is set as sector, opening and closing slot includes first end and second end, drive protrusion is inserted in opening and closing slot and promotes rotation;In the movement path of drive protrusion, the length of opening and closing slot is greater than the length of drive protrusion;When opening, drive protrusion moves to second end until contact, and drive clutch cam piece rotation, clutch cam piece removes the restriction to opening and closing subassembly, reset piece applies driving force to opening and closing subassembly, opening and closing subassembly rotates, drive clutch cam piece rotation, until the first end of opening and closing slot and drive protrusion contact, movable contact and static contact separate.

Description

Technical Field

[0001] This utility model relates to the field of load switch technology, and is particularly applicable to a switching structure and a load switch having the same. Background Technology

[0002] Load switch products typically have a smaller arc when connected and a larger arc when disconnected. The main factors affecting the extinguishing of the disconnecting arc are:

[0003] 1. The distance between moving and stationary contacts; the larger the distance, the easier it is for the electric arc to be extinguished.

[0004] 2. Speed ​​of action: the faster the action, the easier it is to extinguish the electric arc;

[0005] 3. Arc-extinguishing grid assembly device: The easier it is for the electric arc to enter the arc-extinguishing chamber, the easier it is to extinguish when the number and spacing of the arc-extinguishing grids are reasonable;

[0006] The faster the electric arc extinguishes, the less erosion occurs on the moving and stationary contacts, and the longer the electrical life of the product.

[0007] Currently, some manufacturers use motor drives but do not employ a quick-opening structure when the circuit breaker is tripped, which makes the contacts prone to arc erosion and results in a short electrical life. Summary of the Invention

[0008] The purpose of this invention is to solve the above-mentioned problems and provide a switching structure and a load switch having the same.

[0009] To achieve the above-mentioned utility model objectives, this utility model provides a circuit breaker opening and closing structure, including a circuit breaker opening and closing assembly, a reset component connected to the circuit breaker opening and closing assembly, a clutch cam component for driving the circuit breaker opening and closing assembly to rotate, and a drive assembly for driving the clutch cam component to rotate.

[0010] The clutch opening and closing assembly includes a moving contact and a stationary contact. The drive assembly includes a drive protrusion. A clutch opening slot is formed on the clutch cam. The clutch opening slot is fan-shaped and includes a first end and a second end opposite to the first end. The drive protrusion is inserted into the clutch opening slot and pushes the clutch cam to rotate. On the movement path of the drive protrusion, the length of the clutch opening slot is greater than the length of the drive protrusion.

[0011] When the circuit is closed, the drive protrusion contacts the first end and drives the clutch cam to rotate, synchronously driving the circuit breaker assembly to rotate. The moving contact moves toward the stationary contact until it contacts the stationary contact. The clutch cam restricts the movement of the circuit breaker assembly, and the circuit breaker assembly remains stationary.

[0012] When the circuit breaker is opened, the drive protrusion moves toward the second end until it makes contact and drives the clutch cam to rotate. The clutch cam releases the restriction on the circuit breaker assembly. The reset member applies a driving force to the circuit breaker assembly, and the circuit breaker assembly rotates, driving the clutch cam to rotate until the first end of the circuit breaker slot contacts the drive protrusion, and the moving contact separates from the stationary contact.

[0013] More specifically, the reset component includes a push rod and a spring; one end of the push rod contacts the opening and closing assembly, and the other end is connected to the spring; the opening and closing assembly pushes the push rod to move closer to or further away from the spring to compress or release the spring.

[0014] More specifically, the circuit breaker assembly further includes a first rotating shaft, a rotating shaft bracket disposed on the first rotating shaft, and the movable contact disposed on the rotating shaft bracket.

[0015] More specifically, the rotating shaft bracket includes a bracket body that rotates around a first rotating shaft, a pushing part for pushing and resetting the component, and a connecting part that contacts the clutch cam component (3). The pushing part and the connecting part are both disposed on the bracket body.

[0016] More specifically, an energy storage component is provided between the moving contact and the rotating shaft support.

[0017] More specifically, the drive assembly further includes a motor, a worm gear connected to the motor, a worm wheel meshing with the worm gear, a driving wheel connected to the worm wheel, and a driven wheel meshing with the driving wheel. The drive protrudes onto the driven wheel, and the clutch cam is connected to the driven wheel.

[0018] More specifically, two moving contacts and two stationary contacts are provided, and the moving contacts and stationary contacts are provided in a one-to-one correspondence.

[0019] A load switch includes a housing, a closing / opening structure, an arc-extinguishing component, a first connecting plate, and a second connecting plate. The closing / opening structure and the arc-extinguishing component are both disposed within the housing. The first connecting plate and the second connecting plate are both disposed on the housing. The arc-extinguishing component is disposed between the moving contact and the stationary contact of the closing / opening structure.

[0020] More specifically, a manganese-copper shunt is provided on the first connecting plate.

[0021] More specifically, the housing includes an upper housing and a lower housing, the upper housing and the lower housing are snap-fitted together, the upper housing and the lower housing are connected to form an accommodating space, and the opening and closing structure and the arc extinguishing component are disposed in the accommodating space.

[0022] This utility model mainly designs a closing and opening structure and a load switch having the same. When the circuit is closed, the drive protrusion contacts the first end and continuously rotates to drive the clutch cam to rotate. The clutch cam synchronously drives the closing and opening assembly to rotate. The rotation of the closing and opening assembly will cause the moving contact to move towards the stationary contact until the moving contact and the stationary contact are in contact. After the moving contact and the stationary contact are in contact, the clutch cam will restrict the movement of the closing and opening assembly, and the closing and opening assembly will remain stationary.

[0023] During the opening process, the drive protrusion moves towards the second end until it contacts the second end. The drive protrusion continues to rotate, driving the clutch cam to rotate. The rotation of the clutch cam drives the opening and closing assembly to rotate synchronously. At this time, the clutch cam releases its restriction on the opening and closing assembly. The reset member applies a driving force to the opening and closing assembly, causing the opening and closing assembly to rotate. This synchronously drives the clutch cam to rotate. The clutch cam rotates to the first end of the opening slot and contacts the drive protrusion. The moving contact separates from the stationary contact, thus achieving the opening process.

[0024] Setting a trip slot can prevent the moving and stationary contacts from burning out, thus extending their electrical life. Attached Figure Description

[0025] Exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments described below are only for explaining this application and do not limit the scope of this application. In the accompanying drawings:

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0028] Figure 3 This is a three-dimensional structural diagram of the drive component of this utility model;

[0029] Figure 4 This is a three-dimensional structural diagram of the drive assembly and clutch cam component of this utility model.

[0030] Figure 5 This is a three-dimensional structural schematic diagram of the clutch cam component of this utility model;

[0031] Figure 6 This is a three-dimensional structural diagram of the opening and closing assembly of this utility model;

[0032] Figure 7 This is a three-dimensional structural diagram of the rotating shaft bracket of this utility model;

[0033] Figure 8This is a schematic diagram of the front and rear view of the structure of this utility model when the circuit is closed;

[0034] Figure 9 These are front and rear view schematic diagrams of the structure of this utility model, showing the drive protrusion starting to move towards the second end in the closed state.

[0035] Figure 10 This is a front and rear view schematic diagram of the structure of the present invention, in which the driving protrusion contacts the second end and drives the clutch cam to move when the clutch is opened.

[0036] Figure 11 These are front and rear view schematic diagrams of the composite component driving the clutch cam component to rotate during the opening of the clutch in this utility model.

[0037] Figure 12 These are front and rear view structural diagrams of this utility model when the circuit breaker is tripped;

[0038] In the diagram: 1. Housing; 21. Motor; 22. Worm; 23. Worm Gear; 24. Driving Gear; 25. Driven Gear; 26. Drive Protrusion; 3. Clutch Cam; 31. Opening Slot; 41. First Rotating Shaft; 421. Pushing Part; 422. Connecting Part; 423. Support Body; 43. Moving Contact; 44. Stationary Contact; 45. Slot; 46. Torsion Spring; 51. Spring; 53. Push Rod; 6. Arc Extinguishing Assembly; 71. First Connecting Plate; 72. Second Connecting Plate; 8. Manganese Bronze Diverter. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this utility model. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0040] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0041] It should be understood that the accompanying drawings are for illustrative purposes only.

[0042] A type of switching structure, such as Figures 3-12 It includes a circuit breaker assembly, a reset component connected to the circuit breaker assembly, a clutch cam 3 that drives the circuit breaker assembly to rotate, and a drive assembly that drives the clutch cam 3 to rotate.

[0043] like Figures 6-12 As shown, the opening and closing assembly includes a first rotating shaft 41, a rotating shaft bracket mounted on the first rotating shaft 41, a moving contact 43 mounted on the rotating shaft bracket, and a stationary contact 44 that contacts the moving contact 43 when closing. The clutch cam 3 contacts the rotating shaft bracket, and the clutch cam 3 drives the rotating shaft bracket to rotate around the first rotating shaft 41 to realize the contact and separation of the moving contact 43 and the stationary contact 44.

[0044] The rotating shaft support includes a support body 423 that rotates around a first rotating shaft 41. The support body 423 is provided with a pushing part 421 and a connecting part 422. The pushing part 421 is used to push the reset member, and the connecting part 422 is used to contact the clutch cam member 3 and receive the driving force from the clutch cam member 3. When the brake is engaged, the connecting part 422 abuts against the clutch cam member 3 and bears the driving force from the clutch cam member 3. At this time, the driving force of the clutch cam member 3 is greater than the force of the reset member. The bracket and the moving contact 43 rotate synchronously to achieve contact between the moving contact 43 and the stationary contact 44. At this time, the clutch cam 3 restricts the movement of the rotating shaft bracket. When the clutch cam 3 applies a driving force to the connecting part 422, the pushing part 421 applies a squeezing force to the reset part. When the load circuit is disconnected, the clutch cam 3 releases the restriction on the rotating shaft bracket. The rotating shaft bracket and the moving contact 43 rotate only under the force of the reset part, realizing the separation between the moving contact 43 and the stationary contact 44, and realizing the circuit breaker tripping.

[0045] An energy storage component is provided between the moving contact 43 and the rotating shaft support. When the moving contact 43 contacts the stationary contact 44, the energy storage component stores a certain amount of energy. When the load circuit is disconnected, the energy stored in the energy storage component is released, promoting the rapid separation of the moving contact 43 and the stationary contact 44. In this design, the energy storage component is a torsion spring 46. The rotating shaft support is provided with a slot 45. The first end of the torsion spring 46 is set on the rotating shaft support, and the second end of the torsion spring 46 abuts against the moving contact 43 and presses the moving contact 43 into the slot 45. Before the moving contact 43 abuts against the stationary contact 44, the torsion spring 46 holds the moving contact 43... Confined within the slot 45, the relative position of the moving contact 43 and the rotating shaft bracket is fixed. When the moving contact 43 contacts the stationary contact 44, the rotating shaft bracket continues to rotate, while the moving contact 43 cannot continue to rotate with the rotating shaft bracket. This causes the torsion spring 46 to be stretched to store energy. When the load circuit is disconnected, the energy stored in the torsion spring 46 is released, achieving rapid separation of the moving contact 43 and the stationary contact 44. Under the action of the reset element, the moving contact 43 and the stationary contact 44 are further separated, effectively improving the separation speed of the moving contact 43 and the stationary contact 44, reducing the generation of electric arcs, and improving safety.

[0046] The number of moving contacts 43 can be set as needed. Multiple moving contacts 43 and multiple stationary contacts 44 can be set, but the number of moving contacts 43 and stationary contacts 44 must be the same and correspond one-to-one. Using a multi-contact structure can effectively reduce the contact resistance between moving contacts 43 and stationary contacts 44, reduce temperature rise, increase the service life of moving contacts 43 and stationary contacts 44, and improve overall safety. In this solution, two moving contacts 43 and two stationary contacts 44 are set, using dual contacts for current shunting to prevent contact adhesion. Furthermore, both moving contacts 43 and stationary contacts 44 have silver contacts to further prevent contact adhesion.

[0047] like Figure 6 , Figures 8-12 As shown, the reset component includes a push rod 53 that contacts the push part 421 of the rotating shaft bracket and a spring 51 connected to the push rod 53. To achieve contact between the moving contact 43 and the stationary contact 44, that is, to achieve closing, the rotating shaft bracket rotates, and the push part 421 pushes the push rod 53 to move closer to the spring 51, compressing the spring 51. To achieve separation between the moving contact 43 and the stationary contact 44, that is, to achieve opening, the spring 51 releases its compression force, driving the push part 421 to move away from the spring 51, and synchronously driving the rotating shaft bracket to reverse.

[0048] like Figure 1 , Figure 3 , Figure 4 as well as Figure 5As shown, the drive assembly includes a motor 21, a worm gear 22 connected to the motor 21, a worm wheel 23 meshing with the worm gear 22, a driving wheel 24 connected to the worm wheel 23, a driven wheel 25 meshing with the driving wheel 24, and a drive protrusion 26 disposed on the driven wheel 25. The driving wheel 24 rotates following the worm wheel 23. In this design, the driving wheel 24 and the worm wheel 23 are coaxially arranged and rotate synchronously. The driven wheel 25 is connected to the clutch cam 3. Furthermore, the driven wheel 25 and the clutch cam 3 are coaxially arranged, enabling… This design effectively reduces the overall space occupied and improves space utilization. The driven wheel 25 rotates, driving the clutch cam 3 to rotate. The clutch cam 3 applies a driving force to the rotating shaft support, achieving contact between the moving contact 43 and the stationary contact 44 and maintaining their stationary position, ensuring stable contact between them. When the load circuit is disconnected, the clutch cam 3 rotates in the opposite direction, releasing its restriction on the rotating shaft support. Under the action of the reset element, it further rotates the rotating shaft support, achieving rapid separation of the moving contact 43 and the stationary contact 44. The use of a worm gear 23 and a worm 22 reduces the number of parts and simplifies the structure to some extent.

[0049] The size of the drive wheel 24 is smaller than that of the worm gear 23, which can further reduce the size of the entire opening and closing structure and has a faster transmission speed, allowing for faster opening or closing.

[0050] When payment is in arrears, motor 21 activates, driving the drive wheel 24 to rotate in reverse via worm gear 22 and worm wheel 23, simultaneously driving the driven wheel 25 to rotate in reverse. The clutch cam 3 also rotates in reverse, driving the rotating shaft support to rotate in reverse. The moving contact 43 also rotates in reverse, achieving the purpose of opening the circuit breaker. When payment is made, motor 21 activates, driving the drive wheel 24 to rotate via worm gear 22 and worm wheel 23, simultaneously driving the driven wheel 25 to rotate. The clutch cam 3 also rotates in reverse, driving the rotating shaft support to rotate. The moving contact 43 rotates in reverse until it contacts the stationary contact 44, achieving the purpose of closing the circuit breaker.

[0051] If the opening speed is slow when the circuit breaker needs to be opened, it will cause contact erosion and affect the electrical life. In the existing structure, when the circuit breaker needs to be closed, the driven wheel 25 drives the cam to rotate forward. When the circuit breaker needs to be opened, the driven wheel 25 drives the cam to rotate in reverse. The circuit breaker can only be opened when the cam has rotated to a certain angle. Since the cam needs to be driven by the driven wheel 25 to rotate together, and the driven wheel 25 needs time to rotate, it cannot instantly rotate the cam to the position. In this way, contact erosion may also occur during the separation of the moving and stationary contacts 44. Although some structures are equipped with a reset device, since the cam and the driven wheel 25 rotate synchronously, if the circuit breaker is to be opened quickly, the force of the reset device to drive the opening and closing components to rotate requires the cam and the driven wheel 25 to rotate quickly together to ensure that the circuit breaker can be opened quickly. Even if a reset device is set, the rotation of the driven wheel 25 still takes time.

[0052] Therefore, in this solution, to achieve rapid tripping, a tripping groove 31 is provided on the clutch cam 3. The tripping groove 31 is fan-shaped. Furthermore, the tripping groove 31 includes a first end and a second end opposite to the first end. The drive protrusion 26 is inserted into the tripping groove 31 and pushes the clutch cam 3 to rotate. On the movement path of the drive protrusion 26, the length of the tripping groove 31 is greater than the length of the drive protrusion 26. Furthermore, after the drive protrusion 26 is placed in the tripping groove 31, the remaining length of the tripping groove 31 is equal to or greater than the movement path from the moving contact 43 to the stationary contact 44. The drive protrusion 26 is disposed within the tripping slot 31. After the drive protrusion 26 contacts the second end and pushes the clutch cam 3 to rotate, the clutch cam 3 releases its restriction on the tripping assembly. At this time, even if the driven wheel 25 remains stationary, the tripping assembly will rotate rapidly due to the drive of the reset member, synchronously pushing the clutch cam 3 to rotate rapidly. Because of the tripping slot 31, the clutch cam 3 can rotate rapidly without driving the driven wheel 25 to rotate. The moving contact 43 and the stationary contact 44 quickly separate and rotate into place, completing the tripping. In this design, the distance between the moving contact 432 and the stationary contact 44 after disconnection is 7mm.

[0053] Figure 8 A is a front view schematic diagram of the engagement between the closing / opening assembly and the clutch cam during closing. Figure 8 B is a rear view schematic diagram of the engagement between the closing and opening components and the clutch cam during closing. Figure 9 A is a front view schematic diagram of the drive protrusion moving towards the second end in the closed state. Figure 9 B is a rear view schematic diagram of the drive protrusion moving towards the second end when the circuit is closed; Figure 10 A is a front view schematic diagram of the structure in which the drive protrusion contacts the second end and drives the clutch cam to move when the clutch is opened. Figure 10B is a schematic diagram of the rear view of the structure where the drive protrusion contacts the second end and drives the clutch cam to move when the brake is opened; Figure 11 A is a front view schematic diagram of the compound component driving the clutch cam component to rotate when the circuit breaker is tripped. Figure 11 B is a rear view schematic diagram of the compound component driving the clutch cam component to rotate when the circuit breaker is opened; Figure 12 A is a schematic diagram of the main structure of the opening and closing assembly and the clutch cam during the tripping process. Figure 12 B is a rear view schematic diagram of the cooperation between the opening and closing assembly and the clutch cam during the tripping process;

[0054] More specifically, during closing, the motor 21 drives the worm gear 22 and worm wheel 23 to rotate, the worm gear 22 and worm wheel 23 drive the driving wheel 24 to rotate, the driving wheel 24 drives the driven wheel 25 to rotate, the driving protrusion 26 on the driven wheel 25 contacts the first end of the opening slot 31, and pushes the clutch cam 3 to rotate, the clutch cam 3 drives the opening and closing assembly to rotate in the closing direction until the moving contact 43 contacts the stationary contact 44; as Figure 8 As shown in Figure A, the clutch cam 3 restricts the movement of the opening and closing assembly, and the spring is compressed by the push rod to achieve closing; at this time, as Figure 8 As shown in Figure B, the drive protrusion 26 is in contact with the first end;

[0055] When the circuit breaker is tripped, the motor 21 reverses, driving the worm gear 22 to reverse, which in turn drives the drive wheel 24 to reverse. The drive wheel 24 then drives the driven wheel 25 to reverse. Figure 9 As shown in Figure B, the drive protrusion 26 on the driven wheel 25 moves from the first end toward the second end until the drive protrusion 26 contacts the second end; as... Figure 9 A, Figure 10 As shown in Figure A, during this process, the clutch cam 3 does not rotate, and the opening / closing assembly also does not rotate. The clutch cam 3 still restricts the movement of the opening / closing assembly, maintaining the closed state; as... Figure 10 As shown in Figure B, the drive protrusion 26 pushes the second end, causing the clutch cam 3 to rotate slightly. The clutch cam 3 releases the restriction on the opening and closing assembly, and under the action of the reset member, drives the opening and closing assembly to rotate rapidly. At this time, because the opening slot 31 is provided, and the opening slot 31 has a certain length, the rapid rotation of the clutch cam 3 can be achieved. Figure 11 As shown in Figure B, the first end of the trip slot 31 protrudes towards the drive; as Figure 11 As shown in Figure A, when the spring 51 releases pressure, the opening and closing assembly rotates in the opening direction; as... Figure 12 As shown in Figure B, the first end of the gate slot 31 contacts the drive protrusion; as Figure 12 As shown in Figure A, the moving contact 43 separates from the stationary contact 44, thereby achieving rapid tripping.

[0056] A load switch, such as Figure 1 , Figure 2 As shown, it includes a housing 1, a switching structure disposed within the housing 1, a first connecting plate 71 disposed on the housing 1, and a second connecting plate 72 connected to the stationary contact 44. An arc extinguishing component 6 is provided at the position where the moving contact 43 abuts against the stationary contact 44, which can improve the arc extinguishing effect and improve the overall safety of use. In this solution, the arc extinguishing component 6 is set as a mechanical arc extinguishing chamber system.

[0057] Terminals are provided inside the housing 1 for electrical connection to the outside.

[0058] A manganese copper shunt 8 is provided on the first connecting plate 71 to realize the acquisition of current signals.

[0059] The housing includes an upper housing and a lower housing, which are snap-fitted together to form a receiving space. The opening and closing structure and the arc extinguishing assembly are disposed within the receiving space. The upper housing has slots facing the lower housing around its perimeter, and the lower housing has snap-fit ​​protrusions. When the upper and lower housings are connected, the snap-fit ​​protrusions are inserted into the slots to achieve connection. Simultaneously, a placement groove is provided at the position of the snap-fit ​​protrusions, and when the upper and lower housings are connected, the slots are embedded in the placement grooves, ensuring a smooth exterior for the housing 1 after connection.

[0060] A reset component placement groove is provided on the lower housing. The reset component is placed in the reset component placement groove, which is used to restrict the movement of the reset component. After the upper housing and the lower housing are connected, the limiting protrusion extending from the upper housing contacts the top of the reset component placement groove to form a reset component placement space, further restricting the movement of the reset component. One end of the spring of the reset component contacts the push rod, and the other end is connected to the lower housing.

[0061] This utility model mainly achieves rapid opening by designing the tripping slot 31, which allows the clutch cam 3 to rotate quickly, reducing electric arc, avoiding contact burn-out, and improving electrical life; it also includes a reset component to apply rotational force to the tripping assembly, further achieving rapid opening; a worm gear 22 structure reduces the number of parts in the reduction system and simplifies the structure; both moving and stationary contacts use silver contacts to prevent the moving and stationary contacts 44 from sticking together; and a manganese copper shunt 8 is provided to collect current signals.

[0062] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0063] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0064] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A switching structure, characterized in that: The device includes a circuit breaker assembly, a reset component that contacts the circuit breaker assembly, a clutch cam (3) that drives the circuit breaker assembly to rotate, and a drive assembly that drives the clutch cam (3) to rotate. The circuit breaker assembly includes a moving contact (43) and a stationary contact (44). The drive assembly includes a drive protrusion (26). The clutch cam (3) has a fan-shaped circuit breaker groove (31). The circuit breaker groove (31) includes a first end and a second end opposite to the first end. The drive protrusion (26) is inserted into the circuit breaker groove (31) and pushes the clutch cam (3) to rotate. On the movement path of the drive protrusion (26), the length of the circuit breaker groove (31) is greater than the length of the drive protrusion (26). When the circuit breaker is switched from the closed state to the open state, the drive protrusion (26) moves from the first end to the second end until it drives the clutch cam (3) to rotate. The clutch cam (3) releases the restriction on the circuit breaker assembly. The reset member drives the circuit breaker assembly to rotate. The clutch cam (3) rotates along with it until the first end of the open slot (31) contacts the drive protrusion (26). The moving contact (43) separates from the stationary contact (44).

2. The opening and closing structure according to claim 1, characterized in that: The reset component includes a push rod (53) and a spring (51); one end of the push rod (53) is in contact with the opening and closing assembly, and the other end is connected to the spring (51); the spring (51) is squeezed or released to realize the rotation of the opening and closing assembly.

3. The opening and closing structure according to claim 1, characterized in that: The opening and closing assembly also includes a first rotating shaft (41), a rotating shaft bracket disposed on the first rotating shaft (41), and the moving contact (43) disposed on the rotating shaft bracket.

4. The opening and closing structure according to claim 3, characterized in that: The rotating shaft bracket includes a bracket body (423) that rotates around a first rotating shaft (41), a pushing part (421) for pushing and resetting the member, and a connecting part (422) that contacts the clutch cam member (3). The pushing part (421) and the connecting part (422) are both provided on the bracket body (423).

5. The opening and closing structure according to claim 3, characterized in that: An energy storage component is provided between the moving contact (43) and the rotating shaft support.

6. The opening and closing structure according to claim 1, characterized in that: The drive assembly also includes a motor (21), a worm (22) connected to the motor (21), a worm wheel (23) meshing with the worm (22), a drive wheel (24) connected to the worm wheel (23), and a driven wheel (25) meshing with the drive wheel (24). The drive protrusion (26) is provided on the driven wheel (25), and a fixed shaft is provided on the driven wheel (25). The clutch cam (3) is provided on the fixed shaft and can rotate around the fixed shaft.

7. The opening and closing structure according to claim 1, characterized in that: Two moving contacts (43) and two stationary contacts (44) are provided, and the moving contacts (43) and the stationary contacts (44) are provided in a one-to-one correspondence.

8. A load switch, characterized in that: The device includes a housing (1), a switching structure as described in any one of claims 1-7, an arc-extinguishing component (6), a first connecting plate (71), and a second connecting plate (72). The switching structure and the arc-extinguishing component (6) are both disposed within the housing (1). The first connecting plate (71) and the second connecting plate (72) are both disposed on the housing (1). The arc-extinguishing component (6) is disposed between the moving contact (43) and the stationary contact (44) of the switching structure.

9. The load switch according to claim 8, characterized in that: A manganese copper shunt (8) is provided on the first connecting plate (71).

10. The load switch according to claim 8, characterized in that: The housing (1) includes an upper housing and a lower housing. The upper housing and the lower housing are snap-fitted together and the connection between the upper housing and the lower housing forms a receiving space. The opening and closing structure and the arc extinguishing component (6) are disposed in the receiving space.

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