Transmission components and circuit breakers

Abstract

A transmission assembly and a circuit breaker, the circuit breaker includes a transmission assembly, the transmission assembly includes a bracket, a sliding member and a rotating member, the sliding member is slidably matched with the bracket, the sliding member is provided with a second closing matching part and a second opening matching part that are offset and opposite to each other, the driving part of the rotating member is matched with the second closing matching part and the second opening matching part respectively, so that the sliding member slides relative to the bracket to drive the circuit breaker handle to swing, an arc-shaped groove is provided on the surface of the second opening matching part, the arc-shaped groove is located at one end of the second opening matching part close to the second closing matching part, when the limit position is re-locked, the arc surface of the arc-shaped groove coincides with part of the rotation trajectory of the driving part, the arc-shaped groove provides a matching stroke for the driving part, the contact surface of the arc-shaped groove and the driving part is increased, the mutual wear between the components is reduced, and it is beneficial to control the matching time of the driving part and the sliding member.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a transmission component and a circuit breaker. Background Art

[0002] A circuit breaker is a commonly used switching element that not only controls the on and off of a normal circuit, but also provides protection when a system failure occurs. A molded case circuit breaker is usually provided with a transmission assembly, and the sliding member of the transmission assembly and the circuit breaker handle realize the manual operation of the circuit breaker. The electric operating mechanism drives the sliding member through the rotating member to realize the electric operation of the circuit breaker. However, in the existing sliding member, the closing matching part and the opening drive are respectively matched with the rotating member. When the circuit breaker is in the re-locking limit position, the rotating member is matched with the plane at one end of the opening matching part. Due to the small contact surface, the matching of the rotating member and the sliding member can not only fail to ensure the re-locking action time, but also easily cause mutual wear between the parts, especially when the rotating member rotates to the sharp corner at the end of the opening matching part, it is more unfavorable to ensure the stability of the mechanism and seriously affects the service life of the mechanism. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a transmission assembly with simple structure and high reliability and a circuit breaker using the transmission assembly.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A transmission assembly is provided, comprising a bracket, a sliding member and a rotating member, wherein the sliding member is slidably matched with the bracket, the sliding member is provided with a first matching groove and a second matching groove, the first matching groove corresponds to a circuit breaker handle, the second matching groove comprises a second closing matching portion and a second opening matching portion which are offset and opposite to each other, and under the drive of the electric operating mechanism of the circuit breaker, the driving portion of the rotating member respectively matches with the second closing matching portion and the second opening matching portion, so that the sliding member slides relative to the bracket to drive the circuit breaker handle to swing between a closing position, an opening position and a re-locking position, an arc-shaped groove is provided on the surface of the second opening matching portion, the arc-shaped groove is located at one end of the second opening matching portion close to the second closing matching portion, and when in the re-locking limit position, the arc surface of the arc-shaped groove coincides with a part of the rotation trajectory of the driving portion, and the arc-shaped groove provides a matching stroke for the driving portion.

[0006] Preferably, the opposite sides of the second matching groove protrude towards each other to form two protrusions, the planar side walls of the two protrusions are parallel and offset relative to each other, one of the planar side walls serves as the second opening matching portion, and the other planar side wall serves as the second closing matching portion.

[0007] Preferably, the protrusion extends from the edge of the second matching groove to form a right-angle portion, wherein one right-angle side of one right-angle portion serves as the second closing matching portion, and the other right-angle side serves as the first avoidance portion; one right-angle side of the other right-angle portion serves as the second opening matching portion, and the other right-angle side serves as the second avoidance portion.

[0008] Preferably, the arc-shaped groove is provided at a right-angle connection between the second opening gate matching portion and the second avoiding portion.

[0009] Preferably, the rotating member includes a rotating member body, a manually operated opening and closing device is arranged at the center position of the rotating member body, a driving part is arranged at the eccentric position of the rotating body, the driving part includes a protruding fixed shaft and a rolling member assembled on the fixed shaft, and the rolling member rolls with the arc-shaped groove.

[0010] Preferably, the bracket is a plate-like structure, and a plurality of strip-shaped slide grooves are provided on the bracket. The opening direction of the slide grooves is consistent with the opening and closing swing direction of the circuit breaker handle, and a sliding part that slides in cooperation with the slide grooves is provided on the sliding member.

[0011] Preferably, the sliding member is stacked between the bracket and the rotating member, and an operation window and an operation hole are opened in the middle of the bracket. The operation window corresponds to the first matching groove, the circuit breaker handle passes through the operation window and matches with the first matching groove, the operation hole corresponds to the second matching groove, and the manual operation opening and closing device of the rotating member passes through the second matching groove and is exposed from the operation hole.

[0012] Preferably, the sliding member is provided with two grooves which pass through the front and back sides of the sliding member, and the two grooves are arranged at intervals along the sliding direction of the sliding member, one of the grooves serves as a first matching groove, and the other groove serves as a second matching groove; the opposite side edges of the first matching groove extend to form two push surfaces, and the two push surfaces respectively serve as a first closing matching part and a first opening matching part for pushing the circuit breaker handle.

[0013] Preferably, when the driving portion rotates to a position matching the arcuate surface of the arcuate groove, the center of the arcuate surface coincides with the rotation center of the rotating member.

[0014] A circuit breaker is also provided, comprising a shell, in which a circuit breaker body and an electric operating mechanism are installed, a circuit breaker handle connected to the circuit breaker body cooperates to extend out of the shell, and a transmission assembly as described above is installed in the shell.

[0015] In the transmission assembly of the present invention and the circuit breaker using the transmission assembly, an arc-shaped groove is arranged on the surface of the second opening matching part near the end position, and the arc surface of the arc-shaped groove coincides with part of the rotation trajectory of the driving part, providing a matching stroke for the driving part when it is in the re-locking limit position, which not only increases the contact surface between the arc-shaped groove and the driving part, but also reduces the mutual wear between the parts. At the same time, the driving part cooperates with the curved surface, which is conducive to controlling the matching time of the driving part and the sliding part.

[0016] In addition, the driving part is composed of a fixed shaft and a rolling element. The movement between the rolling element and the second matching groove is rolling, especially the rolling matching between the rolling element and the arc-shaped groove, which reduces friction and helps to reduce wear between components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a side view of the transmission assembly of the present invention;

[0018] Figure 2 is a schematic diagram of the structure of the transmission assembly in the present invention after the mounting bracket is removed;

[0019] Figure 3 It is a schematic diagram of the structure of the transmission assembly in the present invention when it is in the open position;

[0020] Figure 4 It is a schematic diagram of the structure of the transmission assembly in the re-fastening process of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the transmission assembly in the present invention at the re-fastening limit position;

[0022] Figure 6 yes Figure 5 A partial enlarged view of the

[0023] Figure 7 It is a schematic diagram of the structure of the bracket in the present invention;

[0024] Figure 8 It is a schematic structural diagram of the rotating part in the present invention;

[0025] Fig. 9 It is a structural schematic diagram of the sliding member in the present invention. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-9 The embodiments given are used to further illustrate the specific implementation of the transmission assembly and the circuit breaker of the present invention. The transmission assembly and the circuit breaker of the present invention are not limited to the description of the following embodiments.

[0027] A transmission assembly includes a bracket 1, a sliding member 2 and a rotating member 3. The sliding member 2 is slidably matched with the bracket 1. The sliding member 2 is provided with a first matching groove 21 and a second matching groove 22. The first matching groove 21 corresponds to the circuit breaker handle. The second matching groove 22 includes a second closing matching portion 221 and a second opening matching portion 222 that are offset and opposite to each other. Under the drive of the electric operating mechanism of the circuit breaker, the driving portion 31 of the rotating member 3 is respectively matched with the second closing matching portion 221 and the second opening matching portion 222, so that the sliding member 2 slides relative to the bracket 1 to drive the circuit breaker handle to swing between the closing position, the opening position and the re-locking position. An arc groove 23 is provided on the surface of the second opening matching portion 222. The arc groove 23 is located at one end of the second opening matching portion 222 close to the second closing matching portion 221. When in the re-locking limit position, the arc surface of the arc groove 23 coincides with a part of the rotation trajectory of the driving portion 31, and the arc groove 23 provides a matching stroke for the driving portion 31.

[0028] In the transmission assembly of the present invention and the circuit breaker using the transmission assembly, the arc-shaped groove 23 is arranged on the surface of the second opening matching portion 222 near the end position, and the arc surface of the arc-shaped groove 23 coincides with part of the rotation trajectory of the driving portion 31, providing a matching stroke for the driving portion 31 when it is in the re-locking limit position, which not only increases the contact surface between the arc-shaped groove 23 and the driving portion 31, but also reduces the mutual wear between the components. At the same time, the driving portion 31 cooperates with the curved surface, which is conducive to controlling the matching time of the driving portion 31 and the sliding member 2.

[0029] Combination Figure 1-9 A specific embodiment of a transmission assembly is provided, the transmission assembly includes a bracket 1, a sliding member 2 and a rotating member 3, wherein the circuit breaker includes a circuit breaker body and an electric operating mechanism, wherein the electric operating mechanism is arranged above the circuit breaker body, the bracket 1 is located in the electric operating mechanism, that is, the bracket 1 is fixed above the circuit breaker body and corresponds to the handle of the circuit breaker body, the sliding member 2 and the bracket 1 are slidably matched, that is, a sliding structure that cooperates with each other is arranged between the sliding member 2 and the bracket 1, so that the sliding member 2 performs linear reciprocating motion along the bracket 1, and the linear motion direction of the sliding member 2 is consistent with the swing direction of the circuit breaker handle, and the sliding structure includes a sliding groove 12 and a sliding groove 12 that cooperate with each other. The sliding part 24 and the sliding member 2 are respectively linked to the circuit breaker handle and the rotating member 3, and the rotating member 3 is driven to rotate by the electric operating mechanism of the circuit breaker. Preferably, the rotating member 3 and the sliding member 2 are located on the same side of the bracket 1, and the sliding member 2 is stacked on one side of the bracket 1. The rotating member 3 passes through the sliding member 2 and is rotatably connected to the bracket 1. The sliding member 2 and the bracket 1 are driven by the rotating member 3 to slide and cooperate, thereby driving the circuit breaker handle to swing between the closing position, the opening position and the re-locking position. In this embodiment, the re-locking position is between the closing position and the opening position, and the re-locking limit position is the critical position where the circuit breaker handle is about to turn from the re-locking position to the closing position.

[0030] The sliding member 2 is provided with a first matching groove 21 and a second matching groove 22. The first matching groove 21 corresponds to the circuit breaker handle. The first closing matching portion 211 and the first opening matching portion 212 are respectively provided on the opposite sides of the first matching groove 21. During the sliding process of the sliding member 2, the first closing matching portion 211 pushes the circuit breaker handle to swing to the closing position, and the first opening matching portion 212 pushes the circuit breaker handle to swing to the opening position and the re-locking position.

[0031] The second matching groove 22 is matched with the rotating member 3, and the second matching groove 22 includes a second closing matching portion 221 and a second opening matching portion 222. Preferably, two protrusions are formed by protruding toward each other from opposite sides of the second matching groove 22, and each protrusion includes at least one plane side wall. The plane side walls of the two protrusions are parallel and offset relative to each other. The plane side wall of one protrusion serves as the second opening matching portion 222, and the plane side wall of the other protrusion serves as the second closing matching portion 221. The second closing matching portion 221, the second opening matching portion 222 and the first closing matching portion 211, the first opening matching portion 212 are parallel to each other. An escape space is reserved between the closing portion 221 and the second opening matching portion 222. The rotating member 3 passes through the second matching groove 22 and can be rotated through the escape space to be rotatably connected to the bracket 1. The driving portion 31 of the rotating member 3 respectively cooperates with the second closing matching portion 221 and the second opening matching portion 222 to push the sliding member 2 to slide along the bracket 1. An arc-shaped groove 23 is provided on the surface of the second opening matching portion 222. The arc-shaped groove 23 is located at one end of the second opening matching portion 222 close to the second closing matching portion 221. When the sliding member 2 and the rotating member 3 are located at the re-locking limit position, the arc surface of the arc-shaped groove 23 coincides with part of the rotation trajectory of the driving portion 31.

[0032] Combination Figure 7 A bracket 1 applied to the present embodiment is provided. The bracket 1 is a plate-like structure. An operation window 11 and an operation hole 13 are provided on the bracket 1. In the figure, the operation window 11 and the operation hole 13 are arranged along the length direction of the bracket 1. A rectangular groove serving as the operation window 11 is provided on the bracket 1. The circuit breaker handle passes through the operation window 11 and cooperates with the sliding member 2. Figure 7 The middle rectangular groove is located in the middle of the upper side panel, and the operating hole 13 is located at one end of the operating window 11. The operating hole 13 can avoid exposing the manual operation opening and closing device 32 arranged on the rotating member 3. A plurality of strip-shaped slide grooves 12 are arranged on the bracket 1, and the opening direction of the slide grooves 12 is consistent with the swing direction of the circuit breaker handle. Figure 7 There are four middle slide grooves 12, which are arranged in pairs on both sides of the bracket 1, one pair of slide grooves 12 is located on both sides of the operation window 11, and the other pair of slide grooves 12 is located on both sides of the operation hole 13. The sliding part 24 of the sliding member 2 slides with the slide groove 12.

[0033] Combination Figure 1-5 8 provides a sliding member 2 used in this embodiment. The sliding member 2 is in a rectangular plate-like structure as a whole. The size of the sliding member 2 is smaller than the bracket 1, which is beneficial for the sliding member 2 not to exceed the range of the bracket 1 during the sliding process, avoiding poor matching between the sliding member 2 and the bracket 1 and occupying too much space in the circuit breaker. A groove is provided on both sides of the sliding member 2, which passes through the front and back sides of the sliding member 2. One of the grooves is rectangular and serves as a first matching groove 21, and the other groove serves as a second matching groove 22. The first matching groove 21 and the second matching groove 22 are arranged at intervals along the length direction of the sliding member 2, that is, along the sliding direction of the sliding member 2. Of course, the first matching groove 21 and the second matching groove 22 can also be arranged at intervals along the sliding direction perpendicular to the sliding direction of the sliding member 2.

[0034] The opposite side edges of the first matching groove 21 extend toward the front or back side of the sliding member 2 to form two push surfaces. In the figure, the two push surfaces extend away from the side of the bracket 1 to avoid interfering with the sliding matching between the sliding member 2 and the bracket 1. One of the push surfaces serves as the first opening matching portion 212, and the other push surface serves as the first closing matching portion 211. Figure 8 The push surface on the lower side is the first closing matching portion 211, and the push surface on the upper side is the first opening matching portion 212. The sliding member 2 performs closing, opening and re-locking movements along the up and down directions.

[0035] The two side edges of the middle part of the second matching groove 22 protrude towards each other to form two protrusions, each of which is a right-angled part in the figure, so that the second matching groove 22 is a dumbbell shape with wide ends and narrow middle part. One right-angled side of one right-angled side serves as the second closing matching part 221, and the other right-angled side serves as the first avoidance part 223. One right-angled side of the other right-angled side serves as the second opening matching part 222, and the other right-angled side serves as the second avoidance part 224. In the figure, the second closing matching part 221 is located on the side of the second matching groove 22 closer to the first matching groove 21, and the first opening matching part 211 and the first closing matching part 222 are provided. 12. The second closing matching portion 221 and the second opening matching portion 222 are kept parallel, and the first avoidance portion 223 and the second avoidance portion 224 are parallel to each other and offset relative to each other. Of course, the protruding portion may not be a right-angle portion. It is only necessary to ensure that the first opening matching portion 211, the first closing matching portion 212, the second closing matching portion 221 and the second opening matching portion 222 are kept parallel. Whether the first avoidance portion 223 and the second avoidance portion 224 are parallel is not specifically limited; the narrower space between the two right-angled portions is the avoidance space, so that the driving portion 31 can rotate through the avoidance space to realize the second opening matching portion 222 The manual opening and closing device 32 is provided with a manual opening and closing device 32, and the manual opening and closing device 32 first passes through the second matching groove 22, and then emerges from the operating hole 13 of the bracket 1, and is used to connect the key of the manual opening and closing. During the movement of the sliding member 2, the manual opening and closing device 32 will not move relative to the bracket 1, but the sliding member 2 moves relatively with the manual opening and closing device 32, which is reflected in the manual opening and closing device 32 moving in the second matching groove 22; an arc groove 23 is provided on the surface of the second opening matching portion 222, which The arcuate groove 23 is located at the right angle where the second opening switch matching portion 222 and the second avoidance portion 224 are connected. It can also be considered that the second avoidance portion 224 is connected to one end of the arcuate surface of the arcuate groove 23. When the sliding member 2 and the rotating member 3 are located at the re-locking limit position, the center of the arcuate surface coincides with the rotation center of the rotating member 3. Preferably, the rotating member 3 is circular. At this time, the arcuate surface is cocentric with the rotating member 3, and the arcuate surface coincides with part of the rotation trajectory of the driving member 31. The arcuate surface provides a matching stroke for the driving member 31, that is, when the driving member 31 rotates to a position matching with the arcuate surface of the arcuate groove 23, the arcuate surface is cocentric with the rotating member 3.

[0036] like Figure 2As shown, a sliding part 24 is provided at the corner position of the sliding member 2, and the sliding part 24 is preferably a roller. The sliding part 24 is slidably matched with the slide groove 12 of the bracket 1. Preferably, a groove is provided on the circumferential surface of the sliding part 24, and the edge of the slide groove 12 is stuck in the groove, which is conducive to the stable matching between the sliding part 24 and the slide groove 12. Of course, a boss structure slidably matched with the slide groove 12 is provided on the sliding member 2 to achieve sliding matching. However, the sliding friction force generated by the boss structure and the slide groove 12 is greater than the rolling friction force between the roller and the slide groove 12, which has a certain interference with the relative sliding of the sliding member 2 and the bracket 1.

[0037] Combination Fig. 9 A rotating member 3 structure applied to the present embodiment is provided, the rotating member 3 comprises a disc-shaped rotating member body, a manually operated opening and closing device 32 is protruded at the center position of the rotating member body, usually, a hexagonal hole is opened on the surface of the manually operated opening and closing device 32, and a hexagonal wrench is used as a key to cooperate with the hexagonal hole of the manually operated opening and closing device 32; a driving part 31 is provided at an eccentric position of the rotating member body, preferably the driving part 31 comprises a fixed shaft 311 and a rolling member 312 assembled on the fixed shaft 311, the fixed shaft 311 protrudes to one side The second engaging groove 22 is provided with a rolling member 312 on the outer side of the fixed shaft 311, and the circumferential side wall of the rolling member 312 cooperates with the second engaging groove 22. That is, when the driving part 31 cooperates with the second opening engaging part 222 or the second closing engaging part 221 to push the sliding member 2, the rolling member 312 also rolls along the second closing engaging part 221 or the second opening engaging part 222. When the driving part 31 cooperates with the arc-shaped groove 23, the driving part 31 no longer pushes the sliding member 2. At this time, the rolling member 312 rolls with the arc-shaped surface of the arc-shaped groove 23.

[0038] In this embodiment, the electric operating mechanism drives the driving part 31 to rotate in the same direction. Figure 8 , the rotation trajectory of the driving part 31 relative to the bracket 1 is Figure 8 The circular track of the middle dashed line, in this embodiment, the rotation direction of the driving part 31 is clockwise, when the driving part 31 cooperates with the second opening gate matching part 222, the sliding member 2 is pushed to slide in the opening gate direction, that is, slide to Figure 3The first opening switch matching portion 212 pushes the circuit breaker handle to swing in the opening direction. At this time, the manually operated opening and closing device 32 is located in the avoidance space; when the driving portion 31 continues to rotate, the driving portion 31 and the second opening switch matching portion 222 push the sliding member 2 to continue to move downward to the re-engaging position. With the movement of the sliding member 2, the manually operated opening and closing device 32 rotates from the avoidance space to one side of the first avoidance portion 223. When the sliding member 2 and the rotating member 3 are located in the re-engaging limit position, the arc surface of the arc-shaped groove 23 coincides with part of the rotation trajectory of the driving portion 31, that is, at this time, the center of the arc surface is coaxial with the circular rotating member 3. In this embodiment, the manually operated opening device 32 is located at the center of the rotating member 3, and the manually operated opening and closing device 32 is located in the manual opening and closing space. The center of the circle of the device 32, the arc surface and the rotating member 3 are co-centered. Of course, when the rotating member 3 is not circular, it is only necessary to ensure that when the driving part 31 rotates to a position that matches the arc surface of the arc groove 23, the center of the arc surface coincides with the rotation center of the rotating member 3; as the rotating member 3 is continuously driven to rotate, the sliding member 2 no longer moves, and the arc surface provides a matching stroke for the driving part 31, so that the rolling member 312 rolls along the arc surface until the driving part 31 rotates through the avoidance space and matches with the second closing matching part 221; when the rotating member 3 is continuously pushed, the driving part 31 matches with the second closing matching part 221, so that the sliding member 2 is pushed to slide in the closing direction, and the first closing matching part 212 drives the circuit breaker handle to swing in the closing direction, that is, along the arc surface. Figure 5 After the switch is in place, the driving part 31 continues to rotate and separates from the second closing matching part 221. At this time, the manual operation opening and closing device 32 passes through the avoidance space and is located on one side of the second avoidance part 224.

[0039] A circuit breaker comprises a housing, a circuit breaker body and an electric operating mechanism assembled in the housing, wherein the electric operating mechanism is located above the circuit breaker body and connected to the circuit breaker body for driving the circuit breaker body to automatically open and close, a circuit breaker handle connected to the circuit breaker body extends out of the housing for manually operating the opening and closing of the circuit breaker body, and a transmission assembly of the above embodiment is arranged in the housing, that is, the transmission assembly is arranged above the circuit breaker body, and the transmission assembly is respectively linked to the electric operating mechanism and the circuit breaker handle.

[0040] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0041] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A transmission assembly, comprising a bracket (1), a sliding member (2) and a rotating member (3), wherein the sliding member (2) is slidably matched with the bracket (1), the sliding member (2) is provided with a first matching groove (21) and a second matching groove (22), the first matching groove (21) corresponds to a circuit breaker handle, the second matching groove (22) comprises a second closing matching portion (221) and a second opening matching portion (222) which are offset and opposite to each other, and under the drive of an electric operating mechanism of the circuit breaker, a driving portion (31) of the rotating member (3) is respectively matched with the second closing matching portion (221) and the second opening matching portion (222), so that the sliding member (2) slides relative to the bracket (1) to drive the circuit breaker handle to swing between a closing position, an opening position and a re-locking position, characterized in that: An arc-shaped groove (23) is provided on the surface of the second opening switch matching part (222), and the arc-shaped groove (23) is located at one end of the second opening switch matching part (222) close to the second closing switch matching part (221). When the second closing switch matching part (221) is in the limit position, the arc-shaped surface of the arc-shaped groove (23) coincides with a part of the rotation trajectory of the driving part (31), and the arc-shaped groove (23) provides a matching stroke for the driving part (31); when the driving part (31) rotates to a position matching with the arc-shaped surface of the arc-shaped groove (23), the center of the arc-shaped surface coincides with the rotation center of the rotating member (3).

2. The transmission assembly according to claim 1, characterized in that: The opposite sides of the second matching groove (22) protrude towards each other to form two protruding portions, the planar side walls of the two protruding portions are parallel and offset relative to each other, one of the planar side walls serves as the second opening matching portion (222), and the other planar side wall serves as the second closing matching portion (221).

3. The transmission assembly according to claim 2, characterized in that: The protruding portion extends from the edge of the second matching groove (22) to form a right-angled portion, wherein one right-angled side of one right-angled portion serves as the second closing matching portion (221), and the other right-angled side serves as the first avoidance portion (223); one right-angled side of the other right-angled portion serves as the second opening matching portion (222), and the other right-angled side serves as the second avoidance portion (224).

4. The transmission assembly according to claim 3, characterized in that: The arc-shaped groove (23) is provided at the right-angle connection between the second opening gate matching portion (222) and the second avoiding portion (224).

5. The transmission assembly according to claim 1, characterized in that: The rotating member (3) comprises a rotating member body, a manually operated opening and closing device (32) is arranged at the center position of the rotating member body, and a driving part (31) is arranged at an eccentric position of the rotating body. The driving part (31) comprises a protruding fixed shaft (311) and a rolling member (312) assembled on the fixed shaft (311), and the rolling member (312) is rollingly matched with the arc-shaped groove (23).

6. The transmission assembly according to claim 1, characterized in that: The bracket (1) is a plate-like structure, and a plurality of strip-shaped slide grooves (12) are provided on the bracket (1). The opening direction of the slide grooves (12) is consistent with the opening and closing swing direction of the circuit breaker handle, and a sliding part (24) is provided on the sliding member (2) for sliding in cooperation with the slide grooves (12).

7. The transmission assembly according to claim 1, characterized in that: The sliding member (2) is stacked between the bracket (1) and the rotating member (3); an operating window (11) and an operating hole (13) are provided in the middle of the bracket (1); the operating window (11) corresponds to a first matching groove (21); a circuit breaker handle passes through the operating window (11) and matches with the first matching groove (21); the operating hole (13) corresponds to a second matching groove (22); and a manually operated opening and closing device (32) of the rotating member (3) passes through the second matching groove (22) and is exposed from the operating hole (13).

8. The transmission assembly according to claim 1, characterized in that: The sliding member (2) is provided with two grooves penetrating the front and back surfaces of the sliding member (2), the two grooves being arranged at intervals along the sliding direction of the sliding member (2), one of the grooves serving as a first matching groove (21), and the other of the grooves serving as a second matching groove (21); opposite side edges of the first matching groove (21) extend to form two push surfaces, the two push surfaces serving as a first closing matching portion (211) and a first opening matching portion (212) for pushing a circuit breaker handle, respectively.

9. A circuit breaker, comprising a housing, a circuit breaker body and an electric operating mechanism are mounted in the housing, a circuit breaker handle connected to the circuit breaker body cooperates to extend out of the housing, and is characterized in that: The transmission assembly according to any one of claims 1 to 8 is assembled in the housing.

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