circuit breaker

Abstract

The utility model relates to a circuit breaker includes: drive mechanism, contact mechanism, connecting rod mechanism and trip mechanism. Connecting rod mechanism connects drive mechanism and contact mechanism for transmitting control to drive contact mechanism to close or open, trip mechanism is used for driving connecting rod mechanism to make contact mechanism open, wherein, trip mechanism includes mutually coordinated traction rod, lock catch, first abutment piece and second abut contact piece. Compared with prior art, the circuit breaker provided by the utility model, its trip mechanism is through first abutment piece and abuts the lock mouth, makes lock catch keep at first position and realizes trip mechanism locking state, through traction rod drive first abutment piece moves and separates with lock catch, realizes trip state, after separating through second abutment piece and abut lock catch, make it fixed at second position, limit the further movement of lock catch, thereby avoided the unnecessary friction after trip action completion, is favorable to the protection on lock catch and first abutment piece, promotes the service life of circuit breaker.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a circuit breaker. Background Technology

[0002] As a crucial protective device in power systems, circuit breakers experience varying degrees of wear and tear during long-term operation due to multiple factors, including mechanical operation, electrical loads, and environmental conditions. This wear not only affects the performance and reliability of the circuit breaker but may also lead to safety hazards.

[0003] In related technologies, the latch is one of the core components of the operating mechanism. Due to the long-term operation of the circuit breaker and the frequent closing, opening, and tripping protection actions, the latch and the parts that move with the latch are more prone to wear than other parts of the circuit breaker. This greatly affects the performance and reliability of the circuit breaker and reduces its service life.

[0004] Therefore, it is necessary to develop a new type of circuit breaker to improve some of the problems existing in the related technologies. Utility Model Content

[0005] The purpose of this utility model is to provide a circuit breaker that can reduce wear when locking other components and improve the reliability of the circuit breaker.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] The circuit breaker provided by this utility model includes: a drive mechanism, a contact mechanism, a linkage mechanism, and a tripping mechanism; the linkage mechanism connects the drive mechanism and the contact mechanism, and is used to transmit control to drive the contact mechanism to close or open; the tripping mechanism is used to drive the linkage mechanism to open the contact mechanism; wherein, the tripping mechanism includes a traction rod, a latch, a first abutment member, and a second abutment member that cooperate with each other; the first abutment member is used to abut the latch, so that the latch is held in a first position to achieve a locked state; the traction rod is connected to the first abutment member, and is used to move the first abutment member, so that the first abutment member is separated from the latch to achieve a tripping state; the second abutment member is used to abut the latch after the latch is separated from the first abutment member, so that the latch is held in a second position.

[0008] Furthermore, the traction rod is rotatably configured, and both the first abutment and the second abutment are fixedly connected to the traction rod so as to rotate synchronously.

[0009] Furthermore, the first abutment and the second abutment form a V-shaped structure.

[0010] Furthermore, the first abutment and the second abutment are integrally formed.

[0011] Furthermore, the latch is rotatable between the first position and the second position, and the latch includes a first abutting part and a second abutting part; the first abutting part is used to abut against the first abutting member in the first position; the upper part of the first abutting part is hollowed out, and the second abutting part is used to abut against the second abutting member in the second position, so that the first abutting member is separated from the first abutting part and accommodated in the hollowed-out area on the first abutting part.

[0012] Furthermore, the first abutting portion and the second abutting portion are plate-shaped structures and are inclined.

[0013] Furthermore, the driving mechanism includes a handle and a lever. The lever includes a lever side plate, a lever connecting part, and a lever embedding part. Two lever side plates are spaced apart, and the lever connecting part connects adjacent lever side plates. One end of the lever embedding part is connected to the lever connecting part, and the other end is embedded in a groove on the lever side plate. The handle is fixedly disposed between the lever side plates.

[0014] Furthermore, the driving mechanism also includes a driving bracket and a jump fastener; the driving bracket is disposed on the base and is used to support the jump fastener and the lever; the jump fastener and the driving bracket are connected by rivets, and the lever side plate is provided with a receiving groove, the head of the rivet is received in the receiving groove.

[0015] Furthermore, the lever side plate portion, the lever connecting portion, and the lever embedding portion are formed by bending sheet metal.

[0016] Furthermore, the driving mechanism also includes a driving bracket, which includes a bracket side plate portion and a bracket connecting portion. The bracket side plates are spaced apart, and the bracket connecting portion is connected to the top of adjacent bracket side plates. The distance between the edge of the bracket connecting portion and the insulating sheet on the surface of the contact shaft is greater than or equal to 0 and less than or equal to 2 mm.

[0017] Furthermore, the contact mechanism includes a rotating shaft support frame, which includes an annular support portion and a fitting fixing portion connected to each other; the annular support portion is disposed in an arc-shaped groove at the top of the base for supporting the contact rotating shaft; the fitting fixing portion is provided with a protrusion, which is embedded in a groove on the side of the base.

[0018] Furthermore, the surface of the traction rod is provided with a partition, which is embedded between adjacent terminals on the load side.

[0019] Compared with the prior art, the circuit breaker provided by this utility model has the following beneficial effects:

[0020] 1. The circuit breaker provided by this utility model has a tripping mechanism in which the first abutting member abuts against the locking port, keeping the locking latch in the first position to achieve the locking state of the tripping mechanism. The first abutting member is moved by the traction rod and separated from the locking latch to achieve the tripping state. After separation, the second abutting member abuts against the locking latch, fixing it in the second position and restricting further movement of the locking latch. This avoids unnecessary friction after the tripping action is completed, which helps to protect the locking latch and the first abutting member and improves the service life of the circuit breaker.

[0021] 2. The traction rod in this utility model is rotatable and is fixedly connected to the traction rod by the first abutment and the second abutment at the same time. When the buckle is released, the separation of the first abutment and the locking and the abutment of the second abutment are synchronized. The overall structure is simple and effective, and the stability and reliability are improved.

[0022] 3. This utility model improves the motion accuracy of the two processes of separating and locking the first abutting member and locking the second abutting member by integrally molding the first abutting member and the second abutting member, and further enhances stability and reliability.

[0023] 4. In this utility model, the upper part of the first abutting part is hollowed out. When the locking is in the second position, the first abutting part is accommodated in the hollowed-out area, which avoids mutual wear between the side of the first abutting part and the side of the first abutting part after separation.

[0024] 5. In this utility model, the lever of the drive mechanism is formed by bending sheet metal to create an interconnected lever side plate, lever connection, and lever embedding part. This improves the structural stability and rigidity of the lever under stress, effectively reduces the deformation of the drive mechanism when operating the handle, and prevents bending deformation by embedding one end of the lever embedding part into the groove on the lever side plate. This also improves the accuracy of the lever position after assembly and increases the strength of the lever when opening and closing the brake.

[0025] 6. This utility model provides a receiving groove on the lever side plate, which provides more space to accommodate the head of the rivet in a compact part environment, so that the jump fastener and the drive bracket can be connected by rivets, effectively improving the reliability of the connection between the two.

[0026] 7. The drive bracket in this utility model includes a bracket side plate and a bracket connecting part. The bracket side plate is disposed on the base, and the bracket connecting part is disposed on the top of the bracket side plate and connects to the adjacent bracket side plate. The edge of the bracket connecting part abuts against the insulating sheet on the surface of the contact shaft and is fixed to each other, or a small gap is left between the two to block the movement of the insulating sheet, so as to prevent the airflow generated by the rapid rotation of the shaft during short circuit breaking from blowing away or breaking the insulating sheet. The absence of gaps or small gaps can also help reduce the amount of air leakage in the contact area and improve the short circuit breaking effect.

[0027] 8. The rotating shaft support frame of this utility model includes an interconnected annular support part and a fitting and fixing part to support the contact rotating shaft and connect to the base. The protrusion on the fitting and fixing part is embedded in the groove on the side of the base, which facilitates the reliable connection of the rotating shaft to the base.

[0028] 9. The surface of the traction rod in this utility model is provided with a partition. By embedding the partition between adjacent terminals on the load side, the creepage distance between the two live parts on the load side is increased, the phase-to-phase insulation performance is improved, and the requirements of the bottom line are met. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the circuit breaker in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A partial schematic diagram of the circuit breaker shown;

[0031] Figure 3 for Figure 1 The diagram shows the interaction between the drive mechanism, the release mechanism, and the linkage mechanism.

[0032] Figure 4 for Figure 3 The diagram shown illustrates the latch in its first position.

[0033] Figure 5 for Figure 3 The diagram shows the latch in the second position.

[0034] Figure 6 for Figure 3 The diagram shows the structure of the latch;

[0035] Figure 7 for Figure 2 The diagram shows the structure of the handle and lever.

[0036] Figure 8 for Figure 2 The diagram shows the structure of the drive bracket.

[0037] Figure 9 for Figure 2 The diagram shows the assembly of the insulating sheet and the drive bracket.

[0038] Figure 10 for Figure 2 The diagram shows the structure of the rotating shaft support frame.

[0039] Figure label:

[0040] 1. Drive mechanism; 11. Jump fastener; 12. Drive bracket; 121. Bracket side plate; 122. Bracket connecting part; 13. Handle; 131. Handle actuating part; 132. Handle connecting part; 14. Lever; 141. Lever side plate; 1411. Receiving groove; 142. Lever connecting part; 143. Lever embedding part; 2. Contact mechanism; 21. Rotary shaft support frame; 211. Annular support part; 212. Embedded fixing part; 22. Contact rotating shaft; 3. Linkage mechanism; 4. Release mechanism; 41. Traction rod; 411. Rib; 42. Lock; 421. First abutment part; 422. Second abutment part; 423. Hollowed-out area; 424. Jump fastener abutment part; 43. First abutment piece; 44. Second abutment piece; 45. Spring; 5. Base; 6. Insulating sheet; 7. Rivet. Detailed Implementation

[0041] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0042] This utility model provides a circuit breaker, as shown in the following embodiment. Figure 1 The circuit breaker includes: a drive mechanism 1, a contact mechanism 2, a linkage mechanism 3, and a tripping mechanism 4; the linkage mechanism 3 connects the drive mechanism 1 and the contact mechanism 2, and is used to transmit control to drive the contact mechanism 2 to close or open; the tripping mechanism 4 is used to drive the linkage mechanism 3 to open the contact mechanism 2; wherein, the tripping mechanism 4 includes a traction rod 41, a latch 42, a first abutment 43, and a second abutment 44 that cooperate with each other; the first abutment 43 is used to abut the latch 42, so that the latch 42 is held in a first position to achieve a locked state; the traction rod 41 connects to the first abutment 43, and is used to move the first abutment 43, so that the first abutment 43 is separated from the latch 42 to achieve a tripping state; the second abutment 44 is used to abut the latch 42 after the latch 42 is separated from the first abutment 43, so that the latch 42 is held in a second position.

[0043] In some embodiments of this invention, when the tripping assembly is in the locked state, the drive mechanism 1, after being externally controlled, drives the contact mechanism 2 to close or open via the linkage mechanism 3, thereby achieving circuit connection or disconnection. When the tripping assembly is in the tripped state, the contact mechanism 2 remains in the open state.

[0044] In some embodiments of this utility model, when the first abutting member 43 abuts against the latch 42 to put the latch 42 in the first position, the jumping fastener 11 on the drive mechanism 1 abuts against the latch 42, and the connecting rod mechanism 3 can drive the contact mechanism 2 to close or open.

[0045] In some embodiments of this utility model, the traction rod 41 drives the first abutting member 43 to move, and the first abutting member 43 separates from the latch 42. When the latch 42 is in the second position, the jumping fastener 11 on the drive mechanism 1 cannot abut the latch 42, and the contact mechanism 2 remains open.

[0046] In some embodiments of this utility model, after the first abutting member 43 separates from the latch 42, the second abutting member 44 abuts against the latch 42, so that the latch 42 is kept in the second position, and the first abutting member 43 and the latch 42 are kept separated.

[0047] In some embodiments of this utility model, the traction rod 41, the first abutment 43, and the second abutment 44 are connected in sequence. The second abutment 44 is indirectly driven by the traction rod 41 through the first abutment 43 and moves to abut against the latch 42, so that the latch 42 is kept in the second position.

[0048] In other embodiments, the traction rod 41 is connected to the second abutment 44, which is directly driven by the traction rod 41 to move and abut against the latch 42, thereby keeping the latch 42 in the second position.

[0049] It should be noted that the traction rod 41 and the second abutment member 44 can be connected by a linkage, cam, or gear transmission, etc. The specific method can be achieved by existing technology known to those skilled in the art, and will not be described in detail here.

[0050] In some embodiments of this utility model, reference is made to... Figure 3 The traction rod 41 is rotatably mounted, and the first abutment 43 and the second abutment 44 are both fixedly connected to the traction rod 41 so as to rotate synchronously.

[0051] In some specific embodiments, reference is made to Figure 1 , Figure 2 and Figure 3 The circuit breaker includes a base 5, on which a drive bracket 12 is provided for supporting the drive mechanism 1. One end of the traction rod 41 is rotatably mounted on the drive bracket 12 via a rotating shaft, and the other end is connected to an external trip unit. A first abutment 43 and a second abutment 44 are provided on the traction rod 41 near the rotating shaft. When the traction rod 41 is rotated under the control of the trip unit, the first abutment 43 and the second abutment 44 rotate synchronously.

[0052] In some specific embodiments, both the first abutment 43 and the second abutment 44 include columnar structures. When the latch 42 is in the first position, the end of the columnar structure abuts against the first abutment portion 421 on the latch 42; when the latch 42 is in the second position, the end of the columnar structure on the second abutment 44 abuts against the second abutment portion 422 on the latch 42. At this time, the columnar structure on the first abutment 43 is accommodated in the hollow area 423 on the first abutment portion 421, and there is no contact between the first abutment 43 and the latch 42. The lack of contact between the first abutment 43 and the latch 42 includes the fact that the sidewalls of the columnar structure on the first abutment 43 do not contact the sidewalls of the hollow area 423 on the latch 42.

[0053] In some embodiments of this utility model, reference is made to... Figure 3 and Figure 4 The first abutting member 43 and the second abutting member 44 form a V-shaped structure.

[0054] In some specific embodiments, reference is made to Figure 3 and Figure 4 The first ends of the columnar structures of the first abutment 43 and the second abutment 44 are both connected to the traction member, and the second ends extend in different directions at a certain angle, so that the columnar structures form a V-shaped structure from a perspective perpendicular to their plane of rotation.

[0055] In some specific embodiments, the first abutment 43, the second abutment 44, and the latch 42 are all symmetrical parts. The first abutment 43 includes at least two symmetrically arranged columnar structures, enabling the first abutment 43 to abut against both sides of the end of the first abutment portion 421. The hollowed-out areas 423 on the first abutment portion 421 are symmetrically arranged to accommodate the two columnar structures on the first abutment 43 respectively. The second abutment 44 includes at least two symmetrically arranged columnar structures for simultaneously abutting against the second abutment portion 422 of the latch 42.

[0056] In some embodiments of this utility model, the first abutting member 43 and the second abutting member 44 are integrally formed.

[0057] In other embodiments, the traction rod 41, the first abutment 43, and the second abutment 44 are integrally formed.

[0058] In some embodiments of this utility model, reference is made to... Figure 4 , Figure 5 and Figure 6The latch 42 is rotatable between a first position and a second position. The latch 42 includes a first abutting part 421 and a second abutting part 422. The first abutting part 421 is used to abut against a first abutting member 43 in the first position. The upper part of the first abutting part 421 is hollowed out. The second abutting part 422 is used to abut against a second abutting member 44 in the second position, so that the first abutting member 43 is separated from the first abutting part 421 and accommodated in the hollowed-out area 423 on the first abutting part 421.

[0059] In some embodiments of this utility model, reference is made to... Figure 6 The first abutment portion 421 and the hollowed-out area 423 can form an I-shaped or T-shaped structure. The first abutment portion 421 includes a first end and a second end opposite to each other. The lower surface of the first end is used to abut against the first abutment member 43, and the second end is used to connect to the second abutment portion 422. The second end is also provided with a snap-fit ​​abutment portion 424 for abutting against the snap-fit ​​member 11. The second abutment portion 422 includes a first end and a second end opposite to each other. The first end is used to connect to the first abutment portion 421, and the first end has a hollowed-out area 423 near the snap-fit ​​abutment portion 424 to avoid interfering with the movement of the snap-fit ​​member 11. A rotation shaft positioning hole is provided at the partial bend of the second end for rotatably mounting on the drive bracket 12.

[0060] Specifically, refer to Figure 4 and Figure 5 When the latch 42 is in the first position, the first abutting member 43 abuts against the first abutting part 421, restricting the rotation of the latch 42 in the rotation direction; the traction rod 41 drives the first abutting member 43 and the second abutting member 44 to rotate synchronously, and the traction rod 41 drives the latch 42 to rotate through the spring 45, causing the first abutting member 43 and the second abutting member 44 to rotate towards the latch 42 side, and the latch 42 rotates towards the first abutting member 43 and the second abutting member 44 side, the rotation direction is shown by the arrow in the figure. During the rotation, the first abutting member 43 separates from the first abutting part 421 and enters the hollow area 423 on the first abutting part 421, and then the second abutting member 44 abuts against the second abutting part 422, keeping the latch 42 in the second position.

[0061] In some specific embodiments, reference is made to Figure 4 and Figure 5 The latch 42 is rotatably mounted on the drive bracket 12 via a rotating shaft. A spring 45 connects the latch 42 and the traction member, providing a reset force to return the latch 42 and the traction rod 41 to their locked positions. Figure 5 The tripped state is reset to Figure 4 The lock is in the locked state. Upon reset, the pull rod rotates counter-clockwise, and the latch rotates clockwise instantaneously.

[0062] Specifically, refer to Figure 4The pull rod 41 and the latch 42 are subjected to the tension of the spring 45, the latch 42 is in the first position, and the first abutting member 43 can abut against the first abutting part 421.

[0063] Specifically, refer to Figure 4 and Figure 5 When the traction rod 41 rotates, the distance between the traction rod 41 and the connection point of the spring 45 on the latch 42 increases, the tension of the spring 45 increases, the traction rod 41 and the latch 42 rotate towards each other, the first abutting member 43 separates from the first abutting part 421 and enters the hollow area 423 on the first abutting part 421, the second abutting member 44 then abuts against the second abutting part 422, so that the latch 42 stops rotating and maintains the second position, and the first abutting member 43 and the first abutting part 421 also remain separated.

[0064] In some specific embodiments, the planes in which the rotation directions of the latch 42, the traction rod 41, the first abutment 43, and the second abutment 44 are located are parallel to or coincide with each other.

[0065] In some embodiments of this utility model, reference is made to... Figure 5 The first abutting part 421 and the second abutting part 422 are plate-shaped structures and are inclined. Through the angle design between the first abutting part 421 and the second abutting part 422, the angle design between the first abutting member 43 and the second abutting member 44, and the height design of the second abutting part 422, the second abutting member 44 can abut against the second abutting part 422 after the first abutting member 43 enters the hollow area 423 on the first abutting part 421.

[0066] Specifically, the included angle between the first abutment portion 421 and the second abutment portion 422 is greater than or equal to 120° and less than or equal to 150°. When the release mechanism is in the locked state, the distance between the surface of the second abutment portion 422 and the end surface of the second abutment member 44 is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

[0067] Specifically, the distance between the surface of the second abutment portion 422 and the end surface of the second abutment member 44 is 0.1, 0.2, 0.3, 0.4 or 0.5 mm.

[0068] Specifically, the end of the second abutment 44 is provided with a bevel. When the release mechanism is in the locked state, the distance between the bevel and the surface of the second abutment 422 is greater than or equal to 0.1 mm and less than or equal to 0.5 mm, and they are parallel to each other.

[0069] In some embodiments of this utility model, reference is made to... Figure 2 and Figure 7The drive mechanism 1 includes a handle 13 and a lever 14. The lever 14 includes a lever side plate portion 141, a lever connecting portion 142, and a lever embedding portion 143. Two lever side plate portions 141 are spaced apart, and the lever connecting portion 142 connects adjacent lever side plate portions 141. One end of the lever embedding portion 143 is connected to the lever connecting portion 142, and the other end is embedded in a groove on the lever side plate portion 141. The handle 13 is fixedly disposed between the lever side plate portions 141.

[0070] In some specific embodiments, reference is made to Figure 7 The handle 13 includes a handle 13 actuating part and a handle 13 connecting part. The two sides of the handle 13 connecting part are connected to the adjacent lever side plate part 141 through two handle 13 fixing shafts. The width of the handle 13 connecting part is determined by the spacing of the lever side plate part 141.

[0071] In some specific embodiments, reference is made to Figure 7 The central area of ​​the lever embedding part 143 is provided with a process hole.

[0072] In some embodiments of this utility model, reference is made to... Figure 2 , Figure 3 and Figure 7 The drive mechanism 1 also includes a drive bracket 12 and a jump fastener 11; the drive bracket 12 is disposed on the base 5 and is used to support the jump fastener 11 and the lever 14; the jump fastener 11 and the drive bracket 12 are connected by rivets 7, and the lever side plate 141 is provided with a receiving groove 1411, and the head of the rivet 7 is received in the receiving groove 1411.

[0073] In some embodiments of this utility model, reference is made to... Figure 8 The drive mechanism 1 also includes a drive bracket 12, which includes a bracket side plate portion 121 and a bracket connecting portion 122. The bracket side plate portions 121 are spaced apart, and the bracket connecting portion 122 is connected to the top of the adjacent bracket side plate portions 121.

[0074] In some specific embodiments, reference is made to Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8The bottom of the drive bracket 12 is connected to the base 5 by fasteners. One end of the jump fastener 11 is rotatably mounted on the drive bracket 12 by a rivet 7, and the other rotating end is used to abut against the jump fastener abutment part 424 on the latch 42. Based on the rotatability of the lever 14, the connection between the jump fastener 11 and the drive bracket 12 is enhanced by the connection of the rivet 7. The lever 14 of the drive mechanism 1 is rotatably mounted on the drive bracket 12, and the lever 14 is sleeved on the outside of the drive bracket 12, so that the bracket side plate 121 and the lever side plate 141 are adjacent. In order to avoid the rivet 7 interfering with the rotation during the rotation of the lever 14, an arc-shaped receiving groove 1411 is provided on the lever side plate 141 of the lever 14 along the relative movement path of the rivet 7 head.

[0075] In some embodiments of this utility model, reference is made to... Figure 7 The lever side plate portion 141, the lever connecting portion 142, and the lever embedding portion 143 are formed by bending sheet metal.

[0076] In some embodiments of this utility model, reference is made to... Figure 2 and Figure 10 The contact mechanism 2 includes a rotating shaft support frame 21 and a contact rotating shaft 22. The rotating shaft support frame 21 includes an annular support part 211 and a fitting and fixing part that are connected to each other. The annular support part 211 is disposed in an arc-shaped groove at the top of the base 5 and is used to support the contact rotating shaft 22. The fitting and fixing part is provided with a protrusion that is embedded in a groove on the side of the base 5.

[0077] In some embodiments of this utility model, reference is made to... Figure 2 and Figure 9 The distance between the edge of the bracket connection 122 and the insulating sheet 6 on the surface of the contact shaft 22 is greater than or equal to 0 and less than or equal to 2 mm, that is, the bracket connection 122 abuts against the insulating sheet 6, or there is a small gap between the bracket connection 122 and the insulating sheet 6. The airflow direction generated by the rapid rotation of the shaft when the short circuit is broken is shown by the arrow in the figure.

[0078] Specifically, the distance between the edge of the bracket connection 122 and the insulating sheet 6 on the surface of the contact shaft 22 is 0, 0.5, 1, 1.5 or 2 mm.

[0079] Specifically, one end of the insulating sheet 6 is laid on one side surface of the contact shaft 22, and the other end extends under the drive mechanism 1, the linkage mechanism 3 and the tripping mechanism 4.

[0080] In some embodiments of this utility model, reference is made to... Figure 1 and Figure 3 The surface of the traction rod 41 is provided with a partition 411, which is embedded between adjacent terminals on the load side.

[0081] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0083] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0084] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0085] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0086] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A circuit breaker characterized by, include: The drive mechanism (1), contact mechanism (2), linkage mechanism (3), and tripping mechanism (4) are included. The linkage mechanism (3) connects the drive mechanism (1) and the contact mechanism (2) and is used to transmit control to drive the contact mechanism (2) to close or open; The tripping mechanism (4) is used to drive the linkage mechanism (3) to open the contact mechanism (2); The release mechanism (4) includes a traction rod (41), a latch (42), a first abutment (43), and a second abutment (44) that cooperate with each other. The first abutment (43) is used to abut against the latch (42) to keep the latch (42) in a first position to achieve a locked state. The traction rod (41) is connected to the first abutment (43) and is used to move the first abutment (43) to separate the first abutment (43) from the latch (42) to achieve a release state. The second abutment (44) is used to abut against the latch (42) after the latch (42) is separated from the first abutment (43) to keep the latch (42) in a second position.

2. The circuit breaker of claim 1, wherein, The traction rod (41) is rotatably configured, and the first abutment (43) and the second abutment (44) are both fixedly connected to the traction rod (41) so as to rotate synchronously.

3. The circuit breaker of claim 2, wherein, The first abutment (43) and the second abutment (44) form a V-shaped structure.

4. The circuit breaker of claim 2, wherein, The first abutment (43) and the second abutment (44) are integrally formed.

5. The circuit breaker of claim 1, wherein, The latch (42) is rotatable between the first position and the second position. The latch (42) includes a first abutting part (421) and a second abutting part (422). The first abutting part (421) is used to abut against the first abutting member (43) in the first position. The upper part of the first abutting part (421) is hollowed out. The second abutting part (422) is used to abut against the second abutting member (44) in the second position, so that the first abutting member (43) is separated from the first abutting part (421) and accommodated in the hollowed-out area (423) on the first abutting part (421).

6. The circuit breaker of claim 5, wherein, The first abutting part (421) and the second abutting part (422) are plate-shaped structures and are inclined.

7. The circuit breaker of claim 1, wherein, The drive mechanism (1) includes a handle (13) and a lever (14). The lever (14) includes a lever side plate (141), a lever connecting part (142), and a lever embedding part (143). Two lever side plates (141) are spaced apart. The lever connecting part (142) connects adjacent lever side plates (141). One end of the lever embedding part (143) is connected to the lever connecting part (142), and the other end is embedded in a groove on the lever side plate (141). The handle (13) is fixedly disposed between the lever side plates (141).

8. The circuit breaker of claim 7, wherein, The drive mechanism (1) further includes a drive bracket (12) and a jump fastener (11); the drive bracket (12) is disposed on the base (5) and is used to support the jump fastener (11) and the lever (14); the jump fastener (11) and the drive bracket (12) are connected by a rivet (7), and the lever side plate (141) is provided with a receiving groove (1411), and the head of the rivet (7) is received in the receiving groove (1411).

9. The circuit breaker of claim 7, wherein, The lever side plate (141), the lever connecting part (142), and the lever embedding part (143) are formed by bending sheet metal.

10. The circuit breaker of claim 1, wherein, The driving mechanism (1) further includes a driving bracket (12), which includes a bracket side plate portion (121) and a bracket connecting portion (122). The bracket side plates (121) are spaced apart, and the bracket connecting portion (122) connects to the top of adjacent bracket side plates (121). The distance between the edge of the bracket connecting portion (122) and the insulating sheet (6) on the surface of the contact shaft (22) is greater than or equal to 0 and less than or equal to 2 mm.

11. The circuit breaker of claim 1, wherein, The contact mechanism (2) includes a rotating shaft support frame (21), which includes an annular support part (211) and a fitting fixing part connected to each other; the annular support part (211) is disposed in an arc-shaped groove at the top of the base (5) for supporting the contact rotating shaft (22); the fitting fixing part is provided with a protrusion, which is embedded in a groove on the side of the base (5).

12. The circuit breaker of claim 1, wherein, The surface of the traction rod (41) is provided with a partition (411), which is embedded between adjacent terminals on the load side.

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