Circuit breaker operating mechanism and circuit breaker

Abstract

The utility model discloses a circuit breaker operating mechanism and a circuit breaker, and relates to the technical field of circuit breakers. The circuit breaker operating mechanism comprises a handle, a quick closing piece, an energy storage elastic piece, a limiting piece and an elastic reset piece, the handle, the quick closing piece and the limiting piece are hinged to a circuit breaker, the handle and the quick closing piece are coaxially arranged, the energy storage elastic piece is connected between the handle and the quick closing piece, and the elastic reset piece is connected between the handle and the limiting piece. The circuit breaker operating mechanism provided by the utility model has the characteristics of fast closing speed, simple structure and easy assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, specifically, a circuit breaker operating mechanism and circuit breaker. BACKGROUND

[0002] The circuit breaker usually includes operating mechanism and contact mechanism, and the handle of the operating mechanism drives the contact device to close by rotating.

[0003] The operating mechanism of part of circuit breakers on the market is slow in closing speed, leading to that the moving contact and the static contact of the contact device form spark for a long time and are easy to burn out. Some operating mechanisms are provided with quick closing devices, but the structure is too complex, the number of parts is too large, and assembly is not easy. SUMMARY

[0004] The utility model aims at providing a circuit breaker operating mechanism which has the characteristics of fast closing speed and simple structure easy to assemble.

[0005] Another purpose of the utility model is to provide a circuit breaker which has the characteristics of longer use and more simple and compact structure.

[0006] The embodiment of the utility model provides a technical scheme:

[0007] A circuit breaker operating mechanism, comprising a handle, a quick closing piece, an energy storage elastic piece, a limiting piece and an elastic reset piece, the handle, the quick closing piece and the limiting piece are hinged to the circuit breaker, and the handle and the quick closing piece are coaxially arranged, the energy storage elastic piece is connected between the handle and the quick closing piece, and the elastic reset piece is connected between the handle and the limiting piece.

[0008] The handle is used for driving the quick closing piece to rotate from an open state to a closed state, and is also used for driving the limiting piece to rotate from a limiting state to a releasing state during the rotation; the limiting piece stops the quick closing piece from reaching the closed state in the limiting state, and releases the stop of the quick closing piece in the releasing state.

[0009] The energy storage elastic piece is used for driving the quick closing piece to reach the closed state when the limiting piece rotates from the limiting state to the releasing state; under the action of the elastic reset piece, the handle has a tendency to rotate from the closed state to the open state, and the limiting piece has a tendency to rotate from the releasing state to the limiting state.

[0010] In the optional implementation, the elastic reset piece is a torsion spring coaxially arranged on the handle, one end of the elastic reset piece abuts against the handle, and the other end abuts against the limiting piece.

[0011] In an optional embodiment, the handle has a first limiting portion and a second limiting portion oppositely arranged in the circumferential direction, one end of the elastic reset member abuts against the first limiting portion, and the other end of the elastic reset member abuts against the second limiting portion and the limiting member in the open state.

[0012] In the process of rotating the handle from the open state to the closed state, the other end of the elastic reset member moves away from the second limiting portion and approaches the first limiting portion.

[0013] In an optional embodiment, one end of the handle coaxially protrudes a sleeve and a limiting ring, the limiting ring is outside the sleeve, and an installation cavity is formed between the sleeve and the limiting ring, and the torsion spring is arranged in the installation cavity; the limiting ring is provided with a relief gap, and the first limiting portion and the second limiting portion are located on opposite sides of the relief gap.

[0014] In an optional embodiment, the limiting member has a force receiving end and a stop end, a part of the limiting member between the force receiving end and the stop end is hinged to the circuit breaker, the force receiving end is connected to the elastic reset member, and the stop end is used to stop the quick coupling member;

[0015] Under the action of the elastic reset member, the force receiving end has a tendency to rotate away from the handle, and the stop end has a tendency to rotate towards the handle.

[0016] In an optional embodiment, the quick coupling member has a bearing portion covering the outer side wall surface of the handle, and the stop end is oppositely arranged with the bearing portion in the limiting state.

[0017] In the process of rotating the quick coupling member from the open state to the closed state, the bearing portion gradually approaches the stop end.

[0018] In an optional embodiment, in the limiting state, the stop end bears against the outer side wall of the handle.

[0019] In the yielding state, the stop end bears against the outer side wall of the bearing portion.

[0020] In an optional embodiment, the stop end has a stop wall, the bearing portion has a bearing wall, the stop wall and the bearing wall are oppositely arranged, and the stop wall is used to bear against the bearing wall in the process of rotating the quick coupling member from the open state to the closed state, so as to stop the continuous rotation of the quick coupling member.

[0021] In an optional embodiment, the stop end further has an unlocking portion, the handle has a pushing portion, and the unlocking portion and the pushing portion are oppositely arranged.

[0022] After the abutting portion abuts against the stop end, the pushing portion pushes the unlocking portion to drive the stop end to rotate away from the handle to disengage from the abutting portion.

[0023] The embodiment of the utility model provides a circuit breaker, including contact mechanism and preceding circuit breaker operating mechanism, the circuit breaker operating mechanism includes handle, quick coupling, energy storage elastic part, limiting piece and elastic reset piece, the handle quick coupling and limiting piece are hinged to the circuit breaker, and the handle and quick coupling are coaxially arranged, the quick coupling is transmission connection with the contact mechanism, the energy storage elastic part is connected between the handle and quick coupling, the elastic reset piece is connected between the handle and limiting piece, the handle is used for driving quick coupling to rotate from the opening state to the closing state, and also is used for driving the limiting piece to rotate from the limiting state to the giving state in the rotating process, the limiting piece stops quick coupling from reaching the closing state in the limiting state, and the limiting piece releases the stop of quick coupling in the giving state, the energy storage elastic part is used for driving quick coupling to reach the closing state when the limiting piece rotates from the limiting state to the giving state, under the action of the elastic reset piece, the handle has the tendency of rotating from the closing state to the opening state, and the limiting piece has the tendency of rotating from the giving state to the limiting state.

[0024] Compared with the prior art, the circuit breaker operating mechanism provided by the utility model, when quick coupling rotates from the opening state to the closing state with the handle, the handle continues to rotate to drive the energy storage elastic part to accumulate elastic potential energy after being stopped by the limiting piece, when the handle rotates to drive the limiting piece to rotate from the limiting state to the giving state, the limiting piece releases the stop of quick coupling, the energy storage elastic part releases the elastic potential energy to drive quick coupling to quickly rotate to the closing state, and quick closing is realized. The elastic reset piece is connected between the handle and the limiting piece, and simultaneously acts as the composite power source of the handle and the limiting piece, so that the number of parts is reduced, and the structure of the operating mechanism is more simple and compact. And it is easier to assemble. Therefore, the circuit breaker operating mechanism provided by the utility model has the characteristics of quick closing speed and simple structure and is easy to assemble. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment. It should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as the limitation to the scope. For ordinary skilled person in the art, other related drawings can be obtained without paying the creative labor according to these drawings.

[0026] Figure 1 Part structure of circuit breaker

[0027] Figure 2 Part structure of circuit breaker Figure 1 Part structure of circuit breaker

[0028] Figure 3 Part structure of circuit breaker Figure 1 Part structure of circuit breaker

[0029] Figure 4 Part structure of circuit breaker Figure 1 Part structure of circuit breaker

[0030] Icon: 10-circuit breaker; 11-housing; 100-circuit breaker operating mechanism; 110-handle; 111-first limiting part; 112-second limiting part; 113-sleeve; 114-limiting ring wall; 115-mounting clamp cavity; 116-avoidance notch; 117-push part; 120-fastening piece; 121-abutting part; 1211-abutting wall; 130-limiting piece; 131-force receiving end; 132-stopping end; 1321-stopping wall; 1322-unlocking part; 140-elastic reset piece. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0033] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the utility model, it is understood that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0035] In addition, the terms "first", "second" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0036] In the description of the utility model, it is also necessary to point out that, unless otherwise explicitly specified and limited, the terms "arrangement", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] The specific embodiments of the utility model will be described in detail below in combination with the drawings.

[0038] Embodiment

[0039] Please refer to Figure 1 , Figure 1 The partial structure schematic view of the circuit breaker 10 provided by the embodiment is shown.

[0040] The circuit breaker 10 provided by the embodiment comprises a shell 11, a contact mechanism (not shown in the figure) and a circuit breaker operating mechanism 100, the contact mechanism and the circuit breaker operating mechanism 100 are arranged in the shell 11, the circuit breaker operating mechanism 100 is in transmission connection with the contact mechanism, and can drive the contact mechanism to close under the force.

[0041] Please refer to Figure 2 , Figure 2 The structure schematic view of the circuit breaker operating mechanism 100 provided by the embodiment when the handle 110 is in the open state is shown.

[0042] The circuit breaker operating mechanism 100 provided by the embodiment comprises a handle 110, a quick coupling 120, an energy storage elastic member (not shown in the figure), a limiting member 130 and an elastic reset member 140. The handle 110, the quick coupling 120 and the limiting member 130 are hinged to the circuit breaker 10, and the handle 110 and the quick coupling 120 are coaxially arranged. The quick coupling 120 is in transmission connection with a contact mechanism. The energy storage elastic member is connected between the handle 110 and the quick coupling 120, and the elastic reset member 140 is connected between the handle 110 and the limiting member 130.

[0043] It should be noted that the coaxial arrangement of the handle 110 and the quick coupling 120 in the embodiment means that the rotation center lines of the handle 110 and the quick coupling 120 coincide.

[0044] The handle 110 is used to drive the quick coupling 120 to rotate from an open state to a closed state together, so that the quick coupling 120 drives the contact mechanism to complete the closing. The limiting member 130 has a limiting state and a releasing state. When the handle 110 and the quick coupling 120 are in the open state, the limiting member 130 is in the limiting state and can stop the quick coupling 120 from reaching the closed state. When the handle 110 and the quick coupling 120 are in the closed state, the limiting member 130 is in the releasing state and releases the stop of the quick coupling 120.

[0045] The handle 110 has a wrench part for external force application. In the process of the handle 110 being driven to rotate from the open state to the closed state, the handle 110 drives the quick coupling 120 to rotate synchronously through the energy storage elastic member. The energy storage elastic member can be a torsional spring, one end of which is connected with the handle 110 and the other end of which is connected with the quick coupling 120. When the handle 110 and the quick coupling 120 rotate relative to each other, the energy storage elastic member is twisted or released.

[0046] When the handle 110 drives the quick coupling 120 to rotate from the open state to the closed state by a certain angle, the quick coupling 120 is abutted by the limiting member 130 and cannot continue to rotate, while the handle 110 continues to rotate relative to the quick coupling 120, twists the energy storage elastic member and makes the energy storage elastic member gradually accumulate elastic potential energy. The handle 110 is also used to drive the limiting member 130 to rotate from the limiting state to the releasing state to release the stop of the quick coupling 120 in the process of continuing to rotate relative to the quick coupling 120.

[0047] The energy storage elastic member is used to release the elastic potential energy when the limiting member 130 rotates from the limiting state to the releasing state, and drive the quick coupling 120 to reach the closed state. It can be understood that at the moment when the limiting member 130 releases the stop of the quick coupling 120, the energy storage elastic member pushes the quick coupling 120 to quickly reach the closed state, drives the contact mechanism to quickly close, shortens the duration of the electric arc formed between the moving contact and the static contact of the contact mechanism, thereby avoiding the moving contact or the static contact from being burned out and improving the service life.

[0048] Under the action of the elastic reset member 140, the handle 110 has a tendency to rotate from the closed state to the open state, and the limiting member 130 has a tendency to rotate from the releasing state to the limiting state. In other words, the elastic reset member 140 serves as a power source for resetting the handle 110 from the closed state to the open state and resetting the limiting member 130 from the releasing state to the limiting state, thereby avoiding the need to separately configure reset devices for the handle 110 and the limiting member 130, reducing the number of parts, and making the overall structure simpler and more compact, and reducing the assembly difficulty.

[0049] In this embodiment, the elastic reset member 140 is a torsion spring coaxially arranged on the handle 110, one end of the elastic reset member 140 abuts against the handle 110, and the other end abuts against the limiting member 130. In another embodiment, the elastic reset member 140 can also be selected from components such as compression springs, according to actual application conditions.

[0050] In Figure 2 In the state shown in FIG. 1, the handle 110 and the quick coupling member 120 are in the open state, and the limiting member 130 is in the limiting state. At this time, the limiting member 130 forms a stop against the quick coupling member 120 in the path of the quick coupling member 120 rotating to the open state, but there is a certain distance between the limiting member 130 and the quick coupling member 120.

[0051] Please refer to Figure 3 and Figure 4 , Figure 3 FIG. 2 shows a structural schematic diagram of the circuit breaker operating mechanism 100 when the limiting member 130 abuts against the quick coupling member 120, Figure 4 FIG. 3 shows a structural schematic diagram of the circuit breaker operating mechanism 100 when the limiting member 130 rotates from the limiting state to the releasing state.

[0052] In fact, the handle 110 has a first limiting portion 111 and a second limiting portion 112 arranged opposite in the circumferential direction, one end of the elastic reset member 140 abuts against the first limiting portion 111, and in the open state, the other end of the elastic reset member 140 abuts against the second limiting portion 112 and the limiting member 130. In the process of the handle 110 rotating from the open state to the closed state, the other end of the elastic reset member 140 moves away from the second limiting portion 112 and moves close to the first limiting portion 111.

[0053] The limiting member 130 has a force receiving end 131 and a stop end 132, a portion of the limiting member 130 between the force receiving end 131 and the stop end 132 is hinged to the circuit breaker 10, the force receiving end 131 is connected to the elastic reset member 140, and the stop end 132 is used to stop the quick coupling member 120; under the action of the elastic reset member 140, the force receiving end 131 has a tendency to rotate in the direction away from the handle 110, and the stop end 132 has a tendency to rotate in the direction close to the handle 110.

[0054] In the limiting state, the stop end 132 is abutted against the outer side wall of the handle 110 under the action of the elastic reset member 140, thereby forming a stable state. In the process of rotating the quick coupling member 120 from the open state to the closed state by the handle 110, the stop end 132 slides on the outer side wall of the handle 110 before the quick coupling member 120 is rotated to abut against the stop end 132. In order to ensure that the stop end 132 can smoothly slide on the outer side wall of the handle 110, in the embodiment, the outer side wall of the handle 110 abutting against the stop end 132 is in a circular arc shape, and the wall surface of the stop end 132 abutting against the outer side wall of the handle 110 is in a convex arc shape.

[0055] It should be noted that when the handle 110 moves from the open state to the closed state, one end of the elastic reset member 140 abutting against the limiting member 130 is actually basically stationary, the second limiting part 112 moves away from the first limiting part 111 under the drive of the handle 110, thereby separating from the elastic reset member 140, and the first limiting part 111 moves towards the second limiting part 112, thereby pushing the two ends of the elastic reset member 140 to gradually tighten.

[0056] For the assembly of the elastic reset member 140, in the embodiment, one end of the handle 110 coaxially protrudes a sleeve 113 and a limiting ring wall 114, the limiting ring wall 114 is located outside the sleeve 113, and an installation clamping cavity 115 is formed between the sleeve 113 and the limiting ring wall 114, and the torsion spring is arranged in the installation clamping cavity 115; the limiting ring wall 114 is provided with an avoiding notch 116, and the first limiting part 111 and the second limiting part 112 are located on opposite sides in the circumferential direction of the avoiding notch 116. In the process of rotating the handle 110, the avoiding notch 116 provided by the limiting ring wall 114 provides space for the elastic reset member 140 to be tightened.

[0057] In the embodiment, the quick coupling member 120 has an abutting part 121 covering the outer side wall surface of the handle 110, and the stop end 132 and the abutting part 121 are oppositely arranged in the limiting state. In the process of rotating the quick coupling member 120 from the open state to the closed state, the abutting part 121 gradually moves towards the stop end 132.

[0058] It can be understood that in the limiting state, the stop end 132 of the limiting member 130 abuts against the abutting part 121 of the quick coupling member 120 on the outer side wall of the handle 110. In the process of rotating the quick coupling member 120 from the open state to the closed state by the handle 110, the abutting part 121 on the quick coupling member 120 gradually moves towards the stop end 132 of the limiting member 130 on the outer side wall of the handle 110. When the abutting part 121 moves to abut against the stop end 132, the rotation is stopped, so that the handle 110 continues to rotate to drive the energy storage elastic member to accumulate elastic potential energy.

[0059] The stop end 132 has a stop wall 1321, and the abutting portion 121 has an abutting wall 1211, the stop wall 1321 is arranged opposite to the abutting wall 1211, that is, the stop wall 1321 is arranged opposite to the abutting wall 1211 on the movement path of the abutting wall 1211, the movement path of the abutting wall 1211 refers to the movement path of the abutting wall 1211 in the process that the quick coupling piece 120 rotates from the tripping state to the closing state. The stop wall 1321 is used to abut against the abutting wall 1211 in the process that the quick coupling piece 120 rotates from the tripping state to the closing state, so as to stop the quick coupling piece 120 from continuing to rotate.

[0060] The stop end 132 further has an unlocking portion 1322, and the handle 110 has a pushing portion, the unlocking portion 1322 is arranged opposite to the pushing portion, that is, the unlocking portion 1322 is arranged opposite to the pushing portion on the movement path of the pushing portion, the movement path of the pushing portion refers to the movement path of the pushing portion in the process that the handle 110 rotates from the tripping state to the closing state. After the abutting wall 1211 moves to abut against the stop wall 1321, the pushing portion pushes the unlocking portion 1322 to drive the stop end 132 to rotate away from the handle 110 to disengage from the abutting portion 121 in the process that the handle 110 continues to rotate, that is, the limiting piece 130 reaches the position releasing state.

[0061] It can be understood that there is still a certain distance between the pushing portion and the unlocking portion 1322 when the handle 110 drives the quick coupling piece 120 to rotate to abut against the abutting wall 1211 and the stop wall 1321. In the process that the handle 110 continues to rotate relative to the quick coupling piece 120, the pushing portion gradually approaches and contacts the unlocking portion 1322, and pushes the stop end 132 away from the outer side wall of the handle 110, so that the stop end 132 drives the stop wall 1321 to move away from the abutting wall 1211 to reach the position releasing state.

[0062] It can be seen that in the process that the handle 110 rotates from the tripping state to the closing state, the elastic return piece 140 is gradually twisted and continuously accumulates elastic potential energy. In the closing state, the elastic return piece 140 continuously applies force to the handle 110 and the limiting piece 130, so that when the circuit breaker 10 trips under certain conditions, the elastic return piece 140 can drive the handle 110 to quickly rotate from the closing state to the tripping state, and drive the limiting piece 130 to quickly recover from the position releasing state to the limiting state, that is, the handle 110 and the limiting piece 130 are reset.

[0063] In summary, the circuit breaker operating mechanism 100 provided by the embodiment has the characteristics of fast closing speed and simple structure and is easy to assemble. Benefiting from the beneficial effects of the circuit breaker operating mechanism 100, the circuit breaker 10 provided by the embodiment has the characteristics of longer service life and more simple and compact structure.

[0064] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A circuit breaker operating mechanism characterized by, The handle (110), the quick coupling (120), the energy storage elastic element, the limiting element (130) and the elastic reset element (140) are hinged to the circuit breaker (10), and the handle (110) and the quick coupling (120) are coaxially arranged, the energy storage elastic element is connected between the handle (110) and the quick coupling (120), and the elastic reset element (140) is connected between the handle (110) and the limiting element (130); The handle (110) is used to drive the quick coupling (120) to rotate from the open state to the closed state, and is also used to drive the limiting element (130) to rotate from the limiting state to the releasing state during the rotation; the limiting element (130) stops the quick coupling (120) from reaching the closed state in the limiting state, and releases the stop of the quick coupling (120) in the releasing state; The energy storage elastic element is used to drive the quick coupling (120) to reach the closed state when the limiting element (130) rotates from the limiting state to the releasing state; Under the action of the elastic reset element (140), the handle (110) has a tendency to rotate from the closed state to the open state, and the limiting element (130) has a tendency to rotate from the releasing state to the limiting state.

2. The circuit breaker operating mechanism of claim 1, wherein, The elastic reset element (140) is a torsion spring coaxially arranged on the handle (110), one end of the elastic reset element (140) abuts against the handle (110), and the other end abuts against the limiting element (130).

3. The circuit breaker operating mechanism of claim 2, wherein, The handle (110) has a first limiting portion (111) and a second limiting portion (112) oppositely arranged in the circumferential direction, one end of the elastic reset element (140) abuts against the first limiting portion (111), and the other end abuts against the second limiting portion (112) and the limiting element (130) in the open state; During the rotation of the handle (110) from the open state to the closed state, the other end of the elastic reset element (140) moves away from the second limiting portion (112) and approaches the first limiting portion (111).

4. The circuit breaker operating mechanism of claim 3, wherein, One end of the handle (110) coaxially protrudes a sleeve barrel (113) and a limiting ring wall (114), the limiting ring wall (114) is located outside the sleeve barrel (113), and an installation clamping cavity (115) is formed between the sleeve barrel (113) and the limiting ring wall (114), the torsion spring is arranged in the installation clamping cavity (115); the limiting ring wall (114) is provided with a avoiding notch (116), and the first limiting portion (111) and the second limiting portion (112) are located on opposite sides of the avoiding notch (116).

5. The circuit breaker operating mechanism of claim 1, wherein, The limiting piece (130) has a force receiving end (131) and a stop end (132), a part of the limiting piece (130) between the force receiving end (131) and the stop end (132) is hinged to the circuit breaker (10), the force receiving end (131) is connected with the elastic reset piece (140), and the stop end (132) is used for stopping the quick coupling piece (120). Under the action of the elastic reset piece (140), the force receiving end (131) has a tendency to rotate away from the handle (110), and the stop end (132) has a tendency to rotate towards the handle (110).

6. The circuit breaker operating mechanism of claim 5, wherein, The quick coupling piece (120) has a bearing part (121) covering the outer side wall surface of the handle (110), in the limiting state, the stop end (132) is arranged opposite to the bearing part (121). During the rotation of the quick coupling piece (120) from the open state to the closed state, the bearing part (121) gradually moves close to the stop end (132).

7. The circuit breaker operating mechanism of claim 6 wherein, In the limiting state, the stop end (132) bears against the outer side wall of the handle (110). In the giving space state, the stop end (132) bears against the outer side wall of the bearing part (121).

8. The circuit breaker operating mechanism of claim 6, wherein, The stop end (132) has a stop wall (1321), the bearing part (121) has a bearing wall (1211), the stop wall (1321) is arranged opposite to the bearing wall (1211), and the stop wall (1321) is used for bearing against the bearing wall (1211) during the rotation of the quick coupling piece (120) from the open state to the closed state, so as to stop the continuous rotation of the quick coupling piece (120).

9. The circuit breaker operating mechanism of claim 6 wherein, The stop end (132) further has an unlocking part (1322), and the handle (110) has a pushing part, the unlocking part (1322) is arranged opposite to the pushing part. After the bearing part (121) moves to bear against the stop end (132), during the continuous rotation of the handle (110), the pushing part pushes the unlocking part (1322) to drive the stop end (132) to rotate away from the handle (110) to disengage from the bearing part (121).

10. A circuit breaker characterized by, The circuit breaker operating mechanism (100) comprises a contact mechanism and the circuit breaker operating mechanism (100) according to any one of claims 1-9, and the quick coupling piece (120) is in transmission connection with the contact mechanism.

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