Circuit breaker accessory and circuit breaker

Abstract

The invention discloses a circuit breaker accessory and a circuit breaker, and belongs to the technical field of electrical equipment.The circuit breaker accessory comprises a second frame, a pressing component, a first frame, movable contacts, movable contact bridges and a plate body, the plate body is installed on the right side of the first frame, the plate body is installed on the left side of the second frame, the second frame and the first frame are connected through a connecting plate, and the movable contact bridges are arranged in pairs; the movable contact bridges are in transmission connection in the first frame and the second frame, the movable contacts are arranged in pairs and installed on the movable contact bridges, and the pressing components are installed between the movable contact bridges and the plate body. The problem that in the prior art, due to the fact that a single-breakpoint connection circuit is adopted, connection is not stable is solved. And the connection performance and the safety are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a circuit breaker accessory and a circuit breaker. Background Art

[0002] In traditional circuit breakers, most structures use a bimetallic strip and two wiring ports. This type of circuit breaker can perfectly achieve circuit breaking under a household voltage of 220V. However, in environments such as factories, the voltage used by most equipment is 380V. Under this voltage, when a short circuit occurs, the current flowing through the bimetallic strip is extremely large, which can easily cause the bimetallic strip to melt, and then lead to leakage.

[0003] The solution to factory circuit breakers for existing equipment is to use four interfaces, two of which are used with electrodes to make the circuit conductive, and the other two are used to connect the ground wire and the neutral wire to disconnect the circuit. However, most existing circuit breakers use a single breakpoint method, connecting the ends with the live wire and the neutral wire to complete the conduction. However, this single breakpoint method is not stable when operating, so it is still prone to leakage risks.

[0004] Therefore, how to provide a circuit breaker accessory and a circuit breaker to solve the defects of the existing circuit breaker structure is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] To this end, the present invention provides a circuit breaker accessory and a circuit breaker to solve the problem of unstable connection caused by adopting a single breakpoint to connect the circuit in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] According to a first aspect of the present invention,

[0008] The present invention discloses a circuit breaker accessory, comprising:

[0009] The first frame has a plate mounted on the right side;

[0010] A second frame, the plate body being installed on the left side, the second frame being connected to the first frame via a connecting plate;

[0011] Moving contact bridges, arranged in pairs, are transmission-connected between the first frame and the second frame;

[0012] Moving contacts, arranged in pairs and mounted on the moving contact bridge;

[0013] A pressing member is installed between the moving contact bridge and the plate body.

[0014] In a possible implementation, one of the pressing members is a contact compression spring, and the other pressing member is a tension spring, and the tension spring is installed in the second frame.

[0015] In a possible implementation, four extension rods are installed on the right end surface of the second frame, one of the dynamic contact bridges is transmission-connected between the four extension rods, and hooks are provided on the left surface of the right dynamic contact bridge and the right surface of the right plate body, and the two ends of the tension spring are respectively hung on the two hooks.

[0016] In a possible implementation, the moving contact bridge includes:

[0017] The connecting piece is made of metal and has through holes, which are arranged in pairs, and the moving contacts are inserted into the through holes;

[0018] A limiting protrusion is installed on the upper surface of the connecting piece;

[0019] The positioning boss is installed on the right surface of the left connecting piece, and the hook is provided on the left surface of the right connecting piece.

[0020] According to a second aspect of the present invention,

[0021] The present invention discloses a circuit breaker, including a circuit breaker accessory and further comprising:

[0022] The base has a hollow structure inside, a driving member is installed in the hollow structure, and one end of the driving member extends out of the side wall of the base;

[0023] A linkage member is installed in the hollow structure, one end of the linkage member extends out of the side wall of the base, and the other end of the linkage member is transmission-connected to the driving member;

[0024] a spring sheet, one end of which is mounted in the hollow structure, the spring sheet passing through the linkage member, and the other end of which is inserted into the circuit breaker accessory;

[0025] A sliding assembly is installed in the hollow structure, and the circuit breaker accessories are drivingly connected to the sliding assembly;

[0026] Four terminal blocks are provided and installed in the hollow structure, and wires are inserted into the terminal blocks;

[0027] A plurality of wiring boards, one end of which is inserted into the wiring head, and the bottom of the other end of the wiring board is inserted into the sliding assembly;

[0028] a return spring arranged in pairs, one end of which is installed in the hollow structure and the other end of which is connected to the linkage member;

[0029] An upper cover is mounted on the upper end of the base. A rectangular block is mounted on the bottom surface of the upper cover. The rectangular blocks are arranged in pairs, and the circuit breaker accessories are arranged between two of the rectangular blocks.

[0030] In a possible implementation, the spring piece includes:

[0031] A positioning cylinder is sleeved on the outside of the round rod in the hollow structure, and one end of the positioning cylinder is connected to a connecting piece;

[0032] A moving piece is connected to the other end of the connecting piece, and a pin is provided at the bottom of the other end of the moving piece, and the pin is drivingly connected to the bottom surface of the base;

[0033] The reinforcing ribs are arranged in pairs and installed on the surface of the moving piece. A plurality of limit blocks are also installed on the surface of the moving piece. The limit blocks are arranged on the outside of the reinforcing ribs.

[0034] In a possible implementation, the sliding assembly includes:

[0035] Clamping rods are provided in pairs and mounted on the bottom surface of the base, a sliding space is formed between the two clamping rods, and the circuit breaker accessories are drivingly connected in the sliding space;

[0036] A plurality of connection blocks are connected to the side of the clamping rod, and the upper surfaces of the connection blocks are provided with insertion holes.

[0037] In one possible implementation, the wiring board includes:

[0038] A connecting plate, one end of which is provided with a wire anti-slip groove on its surface, one end of which is connected to a bent plate, and the other end of which is connected to an extension rod;

[0039] A contact plate is installed at the end of the extension rod, and an insert block is installed at the bottom of the contact plate.

[0040] In one possible implementation, a rectangular hole is provided on the inner surface of the clamping rod, the rectangular holes are arranged in pairs, a limiting arc is provided on the inner surface of the end of the rectangular hole, a limiting spring is installed in the rectangular hole, a limiting ball is provided at the other end of the limiting spring, the outer wall of the limiting ball rests on the inner wall of the limiting arc, a hemispherical hole is provided on the outer surface of the bottom of the circuit breaker accessory, an arc-shaped slide is provided on the outer surface of the bottom of the circuit breaker accessory, and the arc-shaped slide is provided at both ends of the hemispherical hole.

[0041] In a possible implementation, a buffer column is installed on the bottom surface of the base, and the buffer column includes:

[0042] A column is mounted on the bottom surface of the base, a plurality of circular holes are opened on the top surface of the column, and a limiting ring is installed on the surface of the circular holes;

[0043] A T-shaped round rod is transmission-connected in the round hole, and an arc-shaped push block is connected to the end of the T-shaped round rod;

[0044] A buffer spring is installed between the limiting ring and the arc-shaped push block, and the buffer spring is sleeved on the outside of the T-shaped round rod.

[0045] The present invention utilizes a driving member to drive a linkage member to generate deflection, and during the deflection process, the linkage member presses one end of a spring sheet to deform and generate deflection. During the deflection process of the spring sheet, the circuit breaker accessory is moved along the sliding assembly, thereby driving the circuit breaker accessory to gradually approach the terminal board. During the movement of the circuit breaker accessory, the moving contact gradually approaches and contacts the two terminal boards, and drives the clamping member to compress. The elastic force of the compressed clamping member is fed back to the moving contact bridge again, so that the moving contact presses against the terminal board. After contact, the current is connected by the moving contact bridge and a circuit is generated. In this case, the current does not flow to the position of the spring sheet, which means that even a large current will not cause the spring sheet to melt, thereby extending the service life of the entire circuit breaker. In addition to making the connection tighter, the use of the clamping member can also apply the elastic force of the clamping member in the opposite direction to the circuit breaker accessory during the circuit breaking process, driving its displacement and accelerating the circuit breaking response. The use of two moving contacts can achieve better connection performance and better safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0047] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0048] Figure 1 A three-dimensional diagram of a circuit breaker accessory provided by the present invention;

[0049] Figure 2 A three-dimensional diagram of a pressing member provided by the present invention;

[0050] Figure 3 A three-dimensional diagram of the extension rod provided by the present invention;

[0051] Figure 4 An exploded view of the movable contact bridge provided by the present invention;

[0052] Figure 5 A three-dimensional diagram of the base provided by the present invention;

[0053] Figure 6 A three-dimensional diagram of the upper cover provided by the present invention;

[0054] Figure 7 A three-dimensional diagram of the spring sheet provided by the present invention;

[0055] Figure 8 A three-dimensional diagram of the sliding assembly provided by the present invention;

[0056] Figure 9 A three-dimensional diagram of the wiring board provided by the present invention;

[0057] Figure 10 A cross-sectional view of the clamping rod provided by the present invention;

[0058] Figure 11 A three-dimensional diagram of the curved slide provided by the present invention;

[0059] Figure 12 A three-dimensional diagram of the buffer column provided by the present invention;

[0060] Figure 13 A cross-sectional view of a column provided by the present invention;

[0061] Figure 14 A diagram showing the state of use of the circuit breaker provided by the present invention;

[0062] Figure 15 A three-dimensional diagram of the overall structure of the circuit breaker provided by the present invention;

[0063] In the figure: 1 circuit breaker accessory; 11 second frame; 111 extension rod; 12 pressing member; 13 first frame; 14 moving contact; 15 moving contact bridge; 151 hook; 152 connecting piece; 153 limiting protrusion; 154 through hole; 155 positioning boss; 16 plate; 17 hemispherical hole; 18 arc-shaped slide; 2 sliding assembly; 21 connecting block; 22 jack; 23 clamping rod; 231 limiting arc; 232 limiting ball; 233 limiting spring; 234 rectangular hole; 3 terminal block; 3 1. Contact plate; 32. Insert block; 33. Extension rod; 34. Anti-slip groove for wire; 35. Bending plate; 36. Connecting plate; 4. Terminal; 5. Spring piece; 51. Pin; 52. Limiting block; 53. Moving plate; 54. Positioning cylinder; 55. Connecting piece; 56. Reinforcing rib; 6. Driving member; 7. Linking member; 8. Base; 9. Return spring; 20. Rectangular block; 30. Upper cover; 40. Buffer column; 401. Column; 402. Buffer spring; 403. Arc-shaped push block; 404. T-shaped round rod; 405. Round hole; 406. Limiting ring. DETAILED DESCRIPTION

[0064] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0065] Please follow Figure 1-Figure 4 Now, a circuit breaker accessory disclosed in the present invention is described. Figure 1 , including a second frame 11, a clamping member 12, a first frame 13, a moving contact 14, a moving contact bridge 15 and a plate 16. The plate 16 is installed on the right side of the first frame 13, and the plate 16 is installed on the left side of the second frame 11. The second frame 11 and the first frame 13 are connected by a connecting plate. The moving contact bridges 15 are arranged in pairs and are transmission-connected in the first frame 13 and the second frame 11. The moving contacts 14 are arranged in pairs and installed on the moving contact bridges 15. The clamping member 12 is installed between the moving contact bridge 15 and the plate 16.

[0066] In this embodiment, there is a normally open and a normally closed mode, and the circuit breaker accessory 1 used has the following structure: Figure 1 As shown, under this structure, the structures of the first frame 13 and the second frame 11 are the same and the pressing member 12 both adopts a contact compression spring structure, such as Figure 5 As shown, when using this structure, the moving contacts 14 on the two moving contact bridges 15 are all set outwards. When the circuit breaker is in the closed state, Figure 5In the situation shown, the moving contact bridge 15 on the right with two moving contacts 14 is attached to the terminal block 3 connected to the two terminal blocks 4 on the right, and the two terminal blocks 4 on the right are respectively connected to the ground wire and the neutral wire. Although the circuit on the right is in a connected state at this time, it is in an open circuit state because there is no voltage input. When the circuit needs to be connected, the driving member 6 is toggled to drive the linkage member 7 to deflect. After the linkage member 7 is deflected, one end of the spring piece 5 is toggled to deform and deflect. During the deflection process, the spring piece 5 drives the circuit breaker accessory 1 to move to the left. When the driving member 6 cannot continue to rotate and is limited, the moving contact bridge 15 on the left carries the two moving contacts 14 and is in contact with the terminal board 3 connected to the two terminal heads 4 on the left. At this time, the contact compression spring on the left is in a compressed state. The compression of the contact compression spring causes the elastic force to be applied to the moving contact bridge 15, making the moving contact 14 and the terminal board 3 more closely attached. Not only that, when the restriction on the driving member 6 is released, the contact compression spring uses the elastic force generated after compression to drive the circuit breaker accessory 1 to move, which can speed up the response speed when breaking or opening the circuit. The moving contact 14 and the moving contact bridge 15 are both made of metal structure, which is used for circuit conduction when connected. The plate body 16 is used to connect the first frame 13 and the second frame 11 together.

[0067] Based on the previous embodiment, Figure 2 , one of the pressing members 12 is a contact compression spring, and the other pressing member 12 is a tension spring, which is installed in the second frame 11. The use of tension springs is the second use state, which is two normally open or two normally closed modes. Figure 14 As shown, in this case, a tension spring is used on one side and a contact compression spring is used on the other side, because all the moving contacts 14 are arranged in the same direction, as shown in FIG. Figure 14 As shown, the circuit is now in the on state. In this state, the four moving contacts 14 are in contact with the terminal block 3. At this time, the left end is in the on state and the right end is also in the on state. In this case, both the two terminal heads 4 on the left and the two terminal heads 4 on the right are connected to the live wire and the neutral wire. In this way, the circuits at both ends can be used for conduction and are independent circuits. When disconnection is required, the driving component 6 is driven to utilize multi-stage linkage to drive the circuit breaker accessory 1 to move horizontally so that the circuits on both sides are disconnected. This mode is a two-normally closed state. When the driving component 6 is disconnected, the circuit is conductive. There is also a two-normally open mode. When the driving component 6 is disconnected, the left and right circuits are in an open circuit state.

[0068] Based on the previous embodiment, Figure 3Four extension rods 111 are installed on the right end surface of the second frame 11, and one of the moving contact bridges 15 is connected between the four extension rods 111. Hooks 151 are set on the left surface of the right moving contact bridge 15 and the right surface of the right plate 16. The two ends of the tension spring are hung on the two hooks 151 respectively. The setting of the extension rod 111 is used to make the moving contact bridge 15 move horizontally. In the two normally open or two normally closed states, the circuits on the left and right ends are opened and closed synchronously. Therefore, the structures on both sides of the circuit breaker accessory 1 cannot be set to be the same, and Figure 3 The structure shown in the figure can meet the simultaneous breaking operation. The left end uses a contact compression spring. When in contact, the contact compression spring is compressed, and the contact compression spring uses pressure to press the moving contact 14 against the terminal block 3. The structure at the right end uses the elastic force generated by the tension spring when the moving contact 14 is in contact with the terminal block 3. The tension of the tension spring is used to make the moving contact 14 better against the terminal block 3. When a short circuit occurs, the pressure of the tension spring and the contact compression spring is used to achieve the displacement of the circuit breaker accessory 1. The hook 151 is provided for connecting the tension spring.

[0069] Based on the previous embodiment, Figure 4 The moving contact bridge 15 includes a hook 151, a connecting piece 152, a limiting protrusion 153, a through-hole 154, and a positioning boss 155. The connecting piece 152 is made of metal and has through-holes 154 arranged in pairs. The moving contact 14 is inserted into the through-holes 154. The limiting protrusion 153 is mounted on the upper surface of the connecting piece 152, and the positioning boss 155 is mounted on the right surface of the left connecting piece 152. The hook 151 is provided on the left surface of the right connecting piece 152. The positioning boss 155 is used to position and connect the contact compression spring, while the hook 151 is used to position and connect the tension spring. The connecting piece 152 is used for electrical conduction, while the through-hole 154 is used to mount the moving contact 14. The limiting protrusion 153 is used to limit the movement distance of the connecting piece 152.

[0070] Based on the same inventive concept, the present invention also discloses a circuit breaker, such as Figure 5 、 Figure 6 and Figure 15, including a circuit breaker accessory 1, a sliding assembly 2, a terminal block 3, a terminal head 4, a spring piece 5, a driving member 6, a linkage member 7, a base 8, a reset spring 9, a rectangular block 20 and an upper cover 30. The interior of the base 8 is a hollow structure. The driving member 6 is installed in the hollow structure. One end of the driving member 6 extends out of the side wall of the base 8. The linkage member 7 is installed in the hollow structure. One end of the linkage member 7 extends out of the side wall of the base 8. The other end of the linkage member 7 is transmission-connected to the driving member 6. One end of the spring piece 5 is installed in the hollow structure. The spring piece 5 passes through the linkage member 7. The other end of the spring piece 5 is inserted into the circuit breaker accessory 1 The sliding assembly 2 is installed in the hollow structure, the circuit breaker accessory 1 is transmission-connected to the sliding assembly 2, four terminal heads 4 are provided and installed in the hollow structure, a wire is inserted into the terminal head 4, one end of a plurality of terminal blocks 3 is inserted into the terminal head 4, and the bottom of the other end of the terminal block 3 is inserted into the sliding assembly 2, the return springs 9 are arranged in pairs, one end is installed in the hollow structure, and the other end of the return spring 9 is connected to the linkage member 7, the upper cover 30 is installed on the upper end of the base 8, and a rectangular block 20 is installed on the bottom surface of the upper cover 30. The rectangular blocks 20 are arranged in pairs, and the circuit breaker accessory 1 is arranged between the two rectangular blocks 20. By utilizing the setting of the sliding assembly 2, when the spring piece 5 drives the circuit breaker accessory 1 to move, the circuit breaker accessory 1 moves along a predetermined route, so that the moving contact 14 in the circuit breaker accessory 1 is exactly in contact with the terminal block 3, so as to achieve the purpose of circuit conduction. The driving member 6 and the linkage member 7 are basically similar to the structures in the existing circuit breaker. A limit mechanism is provided. After closing the circuit, it can limit the rotation of the driving member 6 so that the circuit remains connected. The terminal head 4 is used to connect the wires, and the terminal block 3 is provided to conduct current. When the driving member 6 is moved, the rotation of the linkage member 7 will cause the reset spring 9 to produce tensile deformation. In this way, when the power is off and reset, the elastic force of the reset spring 9 will pull the linkage member 7 to complete the rapid response. The circuit breaker accessory 1 is clamped by two rectangular blocks 20 to produce the same effect as the sliding assembly 2.

[0071] Based on the previous embodiment, Figure 7The spring piece 5 includes a pin 51, a stopper 52, a moving piece 53, a positioning cylinder 54, a connecting piece 55, and a reinforcing rib 56. The positioning cylinder 54 is sleeved on the outside of the round rod in the hollow structure. One end of the positioning cylinder 54 is connected to the connecting piece 55, and the moving piece 53 is connected to the other end of the connecting piece 55. The bottom of the other end of the moving piece 53 is provided with a pin 51, which is driven by the bottom surface of the base 8. The reinforcing ribs 56 are arranged in pairs and installed on the surface of the moving piece 53. The surface of the moving piece 53 is also equipped with a number of stoppers 52, which are arranged outside the reinforcing ribs 56. The pin 51 is provided to allow the moving piece 53 to move along a predetermined track. Because the thickness of the moving piece 53 is less than the distance between the two frames, the stoppers 52 and the reinforcing ribs 56 allow the end of the moving piece 53 to be stuck between the two frames, facilitating the displacement of the circuit breaker accessory 1. The moving piece 53 will deform and move to drive the displacement of the circuit breaker accessory 1. The positioning cylinder 54 is used to install the spring piece 5.

[0072] Based on the previous embodiment, Figure 8 The sliding assembly 2 includes a connecting block 21, a socket 22, and a clamping rod 23. The clamping rods 23 are arranged in pairs and mounted on the bottom surface of the base 8. The two clamping rods 23 form a sliding space between which the circuit breaker accessory 1 is driven and connected. Several connecting blocks 21 are connected to the sides of the clamping rods 23. The upper surface of the connecting block 21 has a socket 22. The socket 22 is used to insert the plug block 32, thereby fixing the position of the terminal block 3. The two clamping rods 23 form a sliding space, which limits the movement direction of the circuit breaker accessory 1.

[0073] Based on the previous embodiment, Figure 9 The terminal block 3 includes a contact plate 31, an insert block 32, an extension rod 33, a wire anti-slip groove 34, a bent plate 35, and a connecting plate 36. The connecting plate 36 has a wire anti-slip groove 34 on one end. The bent plate 35 is connected to one end of the connecting plate 36, and the extension rod 33 is connected to the other end of the connecting plate 36. The contact plate 31 is mounted on the end of the extension rod 33, and the insert block 32 is mounted on the bottom of the contact plate 31. The contact plate 31 is used to mate with the movable contact 14 to achieve circuit flow. The extension rod 33 is used to adjust the connection position of the contact plate 31. The wire anti-slip groove 34 prevents the wire from sliding and prevents leakage.

[0074] Based on the previous embodiment, Figure 10-11A rectangular hole 234 is provided on the inner surface of the clamping rod 23, and the rectangular holes 234 are arranged in pairs. A limiting arc 231 is provided on the inner surface of the end of the rectangular hole 234, and a limiting spring 233 is installed in the rectangular hole 234. A limiting ball 232 is provided at the other end of the limiting spring 233, and the outer wall of the limiting ball 232 is against the inner wall of the limiting arc 231. A hemispherical hole 17 is provided on the outer surface of the bottom of the circuit breaker accessory 1, and an arc-shaped slide 18 is provided on the outer surface of the bottom of the circuit breaker accessory 1. The arc-shaped slide 18 is provided at both ends of the hemispherical hole 17. The rectangular hole 234 is used to install the limit spring 233, and the limit arc 231 is used to control the extension of the limit ball 232. When the limit ball 232 is connected to the limit spring 233, the limit spring 233 is in a compressed state. Due to the setting of the limit arc 231, only about one-third or one-quarter of the limit ball 232 is outside the clamping rod 23. At this time, it is used in conjunction with the hemispherical hole 17 and the arc slide 18. When the circuit breaker accessory 1 moves, the limit ball 232 is against the arc slide 18. The opening depth of the arc slide 18 is smaller than the hemispherical hole 17. Therefore, when the limit ball 232 is against the arc slide 18, it will push the limit ball 232 toward In a part of the rectangular hole 234, when the circuit breaker accessory 1 is pushed into place, the limiting ball 232 will be pushed outward under the action of the elastic force of the limiting spring 233, so that the limiting ball 232 is against the hemispherical hole 17. In this way, the limiting effect of the limiting ball 232 can limit the further displacement of the circuit breaker accessory 1, but its limiting effect does not affect the normal displacement of the circuit breaker accessory 1, because the moving force is sufficient to overcome the limiting force of the limiting ball 232. However, when the circuit breaker accessory 1 moves into place, the driving force is very small, so it can only overcome the continued movement of the circuit breaker accessory 1, and its limiting force can share part of the force of the spring piece 5, so as to increase the service life of the spring piece 5.

[0075] Based on the previous embodiment, Figure 12-13A buffer column 40 is installed on the bottom surface of the base 8. The buffer column 40 includes a column 401, a buffer spring 402, an arc-shaped push block 403, a T-shaped round rod 404, a circular hole 405 and a limit ring 406. The column 401 is installed on the bottom surface of the base 8. A plurality of circular holes 405 are opened on the top surface of the column 401. A limit ring 406 is installed on the surface of the circular hole 405. The T-shaped round rod 404 is transmission-connected in the circular hole 405. The end of the T-shaped round rod 404 is connected to the arc-shaped push block 403. The buffer spring 402 is installed between the limit ring 406 and the arc-shaped push block 403. The buffer spring 402 is sleeved on the outside of the T-shaped round rod 404. The buffer column 40 is set at the bending position of the spring sheet 5. When the spring sheet 5 bends, the spring sheet 5 will push the arc-shaped push block 403 to move along the T-shaped round rod 404 toward the inside of the circular hole 405, and compress the buffer spring 402 again. Since the compression of the buffer spring 402 has a limit, the T-shaped round rod 404 cannot move further, thereby limiting the bending degree of the spring sheet 5 and preventing the spring sheet 5 from being over-bent and causing the spring sheet 5 to break. When resetting, the buffer spring 402 can also drive the spring sheet 5 to reset, and the buffer spring 402 will also bring the T-shaped round rod 404 and the arc-shaped push block 403 to reset, thereby achieving the next restriction.

[0076] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A circuit breaker accessory, characterized in that: include: The first frame (13) has a plate (16) mounted on the right side; The second frame (11) has the plate body (16) installed on the left side, and the second frame (11) is connected to the first frame (13) via a connecting plate; Moving contact bridges (15), arranged in pairs, are transmission-connected between the first frame (13) and the second frame (11); Moving contacts (14), arranged in pairs, mounted on the moving contact bridge (15); A pressing member (12) is installed between the moving contact bridge (15) and the plate body (16).

2. The circuit breaker accessory according to claim 1, wherein: One of the pressing members (12) is a contact compression spring, and the other pressing member (12) is a tension spring, which is installed in the second frame (11).

3. The circuit breaker accessory according to claim 2, wherein: Four extension rods (111) are installed on the right end surface of the second frame (11), one of the movable contact bridges (15) is transmission-connected between the four extension rods (111), and hooks (151) are provided on the left surface of the right movable contact bridge (15) and the right surface of the right plate body (16), and the two ends of the tension spring are respectively hung on the two hooks (151).

4. The circuit breaker accessory according to claim 3, wherein: The movable contact bridge (15) comprises: The connecting piece (152) is made of metal. The connecting piece (152) is provided with through holes (154). The through holes (154) are arranged in pairs. The moving contacts (14) are inserted into the through holes (154). A limiting protrusion (153) is installed on the upper surface of the connecting piece (152); The positioning boss (155) is installed on the right surface of the left connecting piece (152), and the hook (151) is provided on the left surface of the right connecting piece (152).

5. A circuit breaker comprising the circuit breaker accessory according to claim 1, characterized in that: Also includes: The base (8) has a hollow structure inside, a driving member (6) is installed in the hollow structure, and one end of the driving member (6) extends out of the side wall of the base (8); A linkage member (7) is installed in the hollow structure, one end of the linkage member (7) extends out of the side wall of the base (8), and the other end of the linkage member (7) is in transmission connection with the driving member (6); A spring piece (5), one end of which is mounted in the hollow structure, the spring piece (5) passes through the linkage member (7), and the other end of the spring piece (5) is inserted into the circuit breaker accessory (1); A sliding assembly (2) is installed in the hollow structure, and the circuit breaker accessory (1) is drivingly connected to the sliding assembly (2); Four wiring heads (4) are provided and installed in the hollow structure, and wires are inserted into the wiring heads (4); A plurality of wiring boards (3), one end of which is inserted into the wiring head (4), and the bottom of the other end of the wiring board (3) is inserted into the sliding assembly (2); A return spring (9) is provided in pairs, one end of which is installed in the hollow structure, and the other end of the return spring (9) is connected to the linkage member (7); An upper cover (30) is mounted on the upper end of the base (8), and a rectangular block (20) is mounted on the bottom surface of the upper cover (30). The rectangular blocks (20) are arranged in pairs, and the circuit breaker accessory (1) is arranged between two of the rectangular blocks (20).

6. The circuit breaker according to claim 5, wherein: The spring piece (5) comprises: A positioning cylinder (54) is sleeved on the outside of the round rod in the hollow structure, and one end of the positioning cylinder (54) is connected to a connecting piece (55); A moving piece (53) is connected to the other end of the connecting piece (55), and a pin (51) is provided at the bottom of the other end of the moving piece (53), and the pin (51) is transmission-connected to the bottom surface of the base (8); The reinforcing ribs (56) are arranged in pairs and installed on the surface of the moving piece (53). A plurality of limiting blocks (52) are also installed on the surface of the moving piece (53). The limiting blocks (52) are arranged on the outside of the reinforcing ribs (56).

7. The circuit breaker according to claim 5, wherein: The sliding assembly (2) comprises: Clamping rods (23) are arranged in pairs and mounted on the bottom surface of the base (8); a sliding space is formed between the two clamping rods (23); and the circuit breaker accessory (1) is transmission-connected in the sliding space; A plurality of connection blocks (21) are connected to the side of the clamping rod (23), and a socket (22) is formed on the upper surface of the connection block (21).

8. The circuit breaker according to claim 5, wherein: The terminal block (3) comprises: A connecting plate (36) is provided with a wire anti-slip groove (34) on one end surface, one end of the connecting plate (36) is connected to a bent plate (35), and the other end of the connecting plate (36) is connected to an extension rod (33); A contact plate (31) is installed at the end of the extension rod (33), and an insert block (32) is installed at the bottom of the contact plate (31).

9. The circuit breaker according to claim 7, wherein: A rectangular hole (234) is provided on the inner surface of the clamping rod (23), and the rectangular holes (234) are arranged in pairs. A limiting arc (231) is provided on the inner surface of the end of the rectangular hole (234). A limiting spring (233) is installed in the rectangular hole (234), and a limiting ball (232) is provided at the other end of the limiting spring (233). The outer wall of the limiting ball (232) abuts against the inner wall of the limiting arc (231). A hemispherical hole (17) is provided on the outer surface of the bottom of the circuit breaker accessory (1), and an arc-shaped slideway (18) is provided on the outer surface of the bottom of the circuit breaker accessory (1). The arc-shaped slideway (18) is provided at both ends of the hemispherical hole (17).

10. The circuit breaker according to claim 5, wherein: A buffer column (40) is mounted on the bottom surface of the base (8), and the buffer column (40) comprises: A column (401) is mounted on the bottom surface of the base (8); a plurality of circular holes (405) are opened on the top surface of the column (401); and a limiting ring (406) is mounted on the surface of the circular holes (405); A T-shaped round rod (404) is transmission-connected in the circular hole (405), and an arc-shaped push block (403) is connected to the end of the T-shaped round rod (404); The buffer spring (402) is installed between the limiting ring (406) and the arc-shaped push block (403), and the buffer spring (402) is sleeved on the outside of the T-shaped round rod (404).

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