An operating mechanism and circuit breaker

Abstract

The application discloses an operating mechanism and a circuit breaker, and relates to the technical field of low-voltage electrical apparatuses. The operating mechanism comprises a rotating member, a first connecting rod, a lock catch and a contact support which form a four-bar linkage structure. The application redesigns the size of the four-bar linkage structure, reduces the occupied space of the operating mechanism, and is beneficial to the miniaturization design of the circuit breaker.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, and more particularly to an operating mechanism and a circuit breaker. Background Technology

[0002] Circuit breakers typically consist of structures such as operating components, contact assemblies, and tripping components. In some specific application environments (such as solid-state circuit breakers), the contact assembly does not perform, or does not primarily perform, the function of arc extinguishing.

[0003] However, these circuit breakers still use traditional four-bar linkage operating components, which require a large space and are not conducive to the miniaturization design of circuit breakers. Summary of the Invention

[0004] This invention provides an operating mechanism and a circuit breaker, which facilitates the miniaturization design of the circuit breaker.

[0005] This invention provides:

[0006] An operating mechanism is applied in a circuit breaker, the operating mechanism being used to drive the moving contact and stationary contact in the circuit breaker to close and open the circuit breaker, the operating mechanism including a rotating component, a first connecting rod, a latch and a contact support;

[0007] The first connecting rod includes a first end and a second end. The first end is rotatably connected to the rotating member, and the second end is rotatably connected to both the latch and the contact bracket. The contact bracket is used to connect the moving contact.

[0008] The rotating component includes a first rotation center O1, the first end includes a second rotation center O2, the second end includes a third rotation center O3, and the latch and the contact bracket include a common fourth rotation center O4.

[0009] The distance between the first rotation center O1 and the second rotation center O2 is 3.25mm to 3.75mm, the distance between the second rotation center O2 and the third rotation center O3 is 12.75mm to 13.25mm, the distance between the third rotation center O3 and the fourth rotation center O4 is 4.98mm to 5.48mm, and the distance between the fourth rotation center O4 and the first rotation center O1 is 14.35mm to 14.65mm.

[0010] In some possible implementations, the distance between the first rotation center O1 and the second rotation center O2 is 3.40 mm to 3.50 mm, the distance between the second rotation center O2 and the third rotation center O3 is 12.85 mm to 13.00 mm, the distance between the third rotation center O3 and the fourth rotation center O4 is 5.20 mm to 5.35 mm, and the distance between the fourth rotation center O4 and the first rotation center O1 is 14.40 mm to 14.50 mm.

[0011] In some possible implementations, the latch includes a first through groove and a first limiting groove that are connected to each other, and the contact bracket includes a second through groove and a second limiting groove that are connected to each other.

[0012] At least during the process of switching from opening to closing of the moving contact and the stationary contact, the second end is simultaneously confined in the first limiting groove and the second limiting groove, and the second end, the latch and the contact bracket remain in a steady state.

[0013] In some possible implementations, the latch further includes a first abutting portion that abuts against the side of the second end near the second through groove and confines the second end in the second limiting groove;

[0014] The contact bracket further includes a second abutting portion, which abuts against the side of the second end near the first through groove and confines the second end in the first limiting groove.

[0015] In some possible implementations, the operating mechanism further includes an actuator and a second connecting rod;

[0016] The actuator is slidably disposed on the side of the rotating member away from the latch, one end of the second connecting rod is rotatably connected to the actuator, and the other end of the second connecting rod is rotatably connected to the rotating member.

[0017] In some possible implementations, the operating mechanism further includes an actuator, one end of which is fixedly connected to the rotating member, and the actuator and the rotating member are capable of rotating synchronously around the first rotation center.

[0018] In addition, the present invention also provides a circuit breaker including the operating mechanism as described in the present invention.

[0019] In some possible implementations, the circuit breaker further includes a moving contact and a stationary contact;

[0020] The moving contact is connected to the end of the contact bracket away from the first connecting rod;

[0021] The operating mechanism is used to move the moving contact closer to or away from the stationary contact to close or open the circuit breaker.

[0022] The stationary contact is located on the movement path of the moving contact.

[0023] In some possible implementations, the circuit breaker includes a closed state and an open state, the moving contact is rotatably connected to the contact support, and the operating mechanism further includes a contact torsion spring;

[0024] When the circuit breaker is in the closed state, the contact torsion spring can drive the moving contact to apply a resistance force to the stationary contact;

[0025] When the circuit breaker switches from the closed state to the open state, the contact torsion spring can drive the operating mechanism to move to the open state.

[0026] In some possible implementations, the circuit breaker further includes an electromagnetic trip unit, which includes a push rod;

[0027] When the moving contact closes with the stationary contact, the latch or the contact bracket is located on the movement path of the push rod.

[0028] The beneficial effects of this invention are as follows: This invention proposes an operating mechanism and a circuit breaker, the circuit breaker including the operating mechanism. The operating mechanism includes a rotating component, a first connecting rod, a latch, and a contact support. The rotating component, the first connecting rod, the latch, and the contact support cooperate to form a four-bar linkage structure. The distance between the first rotation center O1 of the rotating component and the second rotation center O2 of the first connecting rod is set to 3.25mm to 3.75mm; the distance between the second rotation center O2 and the third rotation center O3 of the first connecting rod is set to 12.75mm to 13.25mm; the distance between the third rotation center O3 of the first connecting rod and the fourth rotation center O4 of the latch is set to 4.98mm to 5.48mm; and the distance between the fourth rotation center O4 of the latch and the first rotation center O1 of the rotating component is set to 14.35mm to 14.65mm. In other words, this invention redesigns the dimensions of the four connecting rods in the four-bar linkage structure. For some circuit breakers that do not require moving and stationary contacts to perform or primarily perform arc extinguishing functions, the operating mechanism provided by this invention can significantly reduce the space occupied by the operating mechanism, which is beneficial for the miniaturization design of the circuit breaker. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 Exploded view diagrams of circuit breakers in some embodiments are shown;

[0031] Figure 2 A schematic diagram of the operating mechanism when the circuit breaker is in the open state is shown in some embodiments;

[0032] Figure 3 A schematic diagram of the operating mechanism when the circuit breaker is in the closed state is shown in some embodiments;

[0033] Figure 4 A side view of the operating mechanism is shown in some embodiments;

[0034] Figure 5 A schematic diagram of the four-bar linkage structure in some embodiments is shown;

[0035] Figure 6 Schematic diagrams of the four-bar linkage structure in some embodiments are shown;

[0036] Figure 7 Schematic diagrams of the latch structure are shown in some embodiments;

[0037] Figure 8 Schematic diagrams of the contact support structure are shown in some embodiments;

[0038] Figure 9 Schematic diagrams of the rotating component are shown in some embodiments;

[0039] Figure 10 The diagram shows a schematic representation of the structure of the second elastic arm and the third limiting block in some embodiments;

[0040] Figure 11 A three-dimensional structural schematic diagram of the operating mechanism in some embodiments is shown.

[0041] Explanation of key component symbols:

[0042] 100-Operating mechanism; 100a-First state; 100b-Second state; 110-Actuator; 120-Rotating component; 121-Rotating plate body; 122-Connecting bushing; 123-First limiting rod; 124-First limiting block; 130-First connecting rod; 131-First end; 132-Second end; 140-Lock; 1401-First through groove; 1402-First limiting groove; 141-Lock body; 1411-First abutting part; 142-Second limiting rod; 143-Adapter rod; 144-Sleeve part; 145-Second limiting block; 146-Push plate; 150-Contact bracket; 1501-Second through groove; 1502-Second limiting groove; 15 1-Second abutment part; 160-Second connecting rod; 171-First rotating shaft; 172-Second rotating shaft; 173-Third rotating shaft; 181-First torsion spring; 1811-First torsion spring body; 1812-First elastic arm; 1813-Second elastic arm; 182-Second torsion spring; 1821-Second torsion spring body; 1822-Third elastic arm; 1823-Fourth elastic arm; 200-Contact mechanism; 210-Moving contact; 211-Connecting end; 212-Contact end; 213-Abutment plate; 220-Stationary contact; 300-Electromagnetic trip unit; 310-Push rod; 400-Housing assembly; 410-First housing; 420-Second housing; 421-Third limiting block. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, 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," "over," and "on top" of 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.

[0048] The embodiment provides a circuit breaker that can be used for power distribution, protection of load lines, etc.

[0049] like Figures 1 to 3 As shown, the circuit breaker may include a housing assembly 400, an operating mechanism 100, a contact mechanism 200, and an electromagnetic trip unit 300, etc.

[0050] The housing assembly 400 includes a first housing 410 and a second housing 420, which can be fitted together to form a mounting cavity. The operating mechanism 100, the contact mechanism 200, and the electromagnetic trip unit 300 can all be installed in the mounting cavity.

[0051] The contact mechanism 200 may include a moving contact 210 and a stationary contact 220. The moving contact 210 is connected to the operating mechanism 100, which can be used to move the moving contact 210 relative to the housing assembly 400. The stationary contact 220 may be fixedly installed in the housing assembly 400 and may be located on the movement path of the moving contact 210. When the operating mechanism 100 moves the moving contact 210 relative to the housing assembly 400, the moving contact 210 can move closer to or further away from the stationary contact 220 to achieve closing or opening operations.

[0052] In this embodiment, the operating mechanism 100 may include a first state 100a and a second state 100b. When the operating mechanism 100 is in the first state 100a, the moving contact 210 and the stationary contact 220 are in a separated state, that is, the circuit breaker is in an open state. When the operating mechanism 100 is in the second state 100b, the moving contact 210 and the stationary contact 220 are in contact, that is, the circuit breaker is in a closed state.

[0053] The electromagnetic trip unit 300 can be arranged opposite to the operating mechanism 100. When a short circuit or other situation occurs in the line, the electromagnetic trip unit 300 can trigger the operating mechanism 100 to separate the moving contact 210 from the stationary contact 220, thereby realizing the tripping action.

[0054] like Figures 1 to 3 As shown, the operating mechanism 100 may include an actuator 110, a rotating component 120, a first connecting rod 130, a latch 140, and a contact support 150.

[0055] In some embodiments, the actuator 110 is slidably mounted on one end of the housing assembly 400, and one end of the actuator 110 is telescopically extendable relative to the housing assembly 400. When the operating mechanism 100 is in a first state 100a, the actuator 110 may extend a longer dimension relative to the outside of the housing assembly 400. Correspondingly, when the operating mechanism 100 is in a second state 100b, the actuator 110 may extend a shorter dimension relative to the outside of the housing assembly 400.

[0056] Combined again Figure 4 and Figure 5 In this embodiment, the rotating member 120 is rotatably mounted in the housing assembly 400 via a first rotating shaft 171, and the rotating member 120 can rotate around the first rotating shaft 171. Accordingly, the rotating member 120 may include a first rotation center O1, which may be located on the axis of the first rotating shaft 171. In this embodiment, the two ends of the first rotating shaft 171 are respectively connected to the first housing 410 and the second housing 420.

[0057] In some embodiments, the actuator 110 can be connected to the rotating member 120 via a second connecting rod 160. Specifically, one end of the second connecting rod 160 is rotatably connected to the actuator 110, and the other end is rotatably connected to the rotating member 120. When the actuator 110 slides relative to the housing assembly 400, the rotating member 120 can be driven to rotate around the first pivot 171 via the second connecting rod 160. In some embodiments, the second connecting rod 160 can be a U-shaped rod.

[0058] In other embodiments, the actuator 110 is rotatably mounted relative to the housing assembly 400. Specifically, one end of the actuator 110 can be fixedly connected to the periphery of the rotating member 120 by means of screw connection, integral molding, bonding, etc. Correspondingly, the actuator 110 can rotate synchronously with the rotating member 120 around the first pivot 171. The end of the actuator 110 away from the rotating member 120 can be extended relative to the housing assembly 400 for user access. The user can drive the rotating member 120 to rotate around the first pivot 171 by moving the end of the actuator 110 that extends relative to the housing assembly 400.

[0059] like Figures 2 to 4 As shown, in some embodiments, both the latch 140 and the contact support 150 are rotatably mounted within the housing assembly 400 via the second pivot 172, and the latch 140 and the contact support 150 are located on the side of the rotating member 120 away from the actuating member 110. Both the latch 140 and the contact support 150 can rotate about the second pivot 172. Furthermore, the latch 140 and the contact support 150 can rotate relative to each other. Accordingly, the latch 140 and the contact support 150 may include a common fourth rotation center O4, which may be located on the axis of the second pivot 172. Along the axial direction of the second pivot 172, the latch 140 and the contact support 150 are arranged side-by-side, wherein the latch 140 may be closer to the side of the second housing 420. In this embodiment, the second pivot 172 is parallel to the first pivot 171.

[0060] like Figures 4 to 6 As shown, in this embodiment, the rotating member 120 can be connected to the latch 140 and the contact support 150 respectively via the first connecting rod 130. Specifically, the first connecting rod 130 may include a first end 131 and a second end 132. The first end 131 of the first connecting rod 130 is rotatably connected to the rotating member 120. Along the circumference of the first rotating shaft 171, the connection position of the first end 131 and the rotating member 120 may be located on the clockwise side of the connection position of the second connecting rod 160 and the rotating member 120. The second end 132 of the first connecting rod 130 can be rotatably connected to both the latch 140 and the contact support 150 simultaneously.

[0061] Accordingly, the first end 131 of the first connecting rod 130 may include a second rotation center O2, which is located on the relative rotation axis between the first end 131 and the rotating member 120. The second end 132 of the first connecting rod 130 may include a third rotation center O3, which is located on the relative rotation axis between the second end 132 and the latch 140.

[0062] like Figures 6 to 8 As shown, in some embodiments, the latch 140 may include a first through groove 1401 and a first limiting groove 1402 that are connected. The first through groove 1401 and the first limiting groove 1402 can generally cooperate to form an inverted L-shaped through hole structure. The first limiting groove 1402 may be located at the end of the first through groove 1401 away from the second rotating shaft 172. Around the circumference of the second rotating shaft 172, the first limiting groove 1402 may be located on one side of the second through groove 1501 in a counterclockwise direction.

[0063] In this embodiment, the latch 140 further includes a first abutting portion 1411, which may be located at the connection between the first through groove 1401 and the first limiting groove 1402, and the first abutting portion 1411 is located on the side of the first limiting groove 1402 near the second rotating shaft 172.

[0064] The contact support 150 may have a connected second through groove 1501 and a second limiting groove 1502. The second through groove 1501 and the second limiting groove 1502 can be roughly fitted together to form an L-shaped through hole structure. Around the second rotating shaft 172, the second limiting groove 1502 may be located on one side of the second through groove 1501 in the counterclockwise direction.

[0065] In this embodiment, the contact support 150 further includes a second abutment portion 151, which may be located at a position where the second through groove 1501 and the second limiting groove 1502 are connected, and the second abutment portion 151 may be located on the side of the second through groove 1501 away from the second rotating shaft 172.

[0066] When the first connecting rod 130, the latch 140, and the contact bracket 150 are in a stable state, the second end 132 of the first connecting rod 130 can be sequentially inserted into the first limiting groove 1402 and the second limiting groove 1502. The first abutting part 1411 can abut against the side of the second end 132 near the second through groove 1501 to limit the second end 132 in the second limiting groove 1502. The second abutting part 151 can abut against the side of the second end 132 near the first through groove 1401 to limit the second end 132 in the first limiting groove 1402. Thus, the connection between the first connecting rod 130, the latch 140, and the contact bracket 150 can be realized.

[0067] like Figures 2 to 4 as well as Figure 6As shown, the end of the contact support 150 away from the second rotating shaft 172 may protrude relative to the side of the latch 140 away from the first connecting rod 130. The moving contact 210 may be connected to the position of the contact support 150 protruding relative to the latch 140. Specifically, the moving contact 210 may include a connecting end 211 and a contact end 212. The connecting end 211 may be connected to the contact support 150. Correspondingly, the moving contact 210 may be driven by the contact support 150 to rotate around the second rotating shaft 172. The stationary contact 220 may be located on the movement path of the contact end 212 so that the contact end 212 of the moving contact 210 can abut against the stationary contact 220.

[0068] like Figure 5 and Figure 6 As shown, in this embodiment, a first link I can be formed between the first rotation center O1 of the rotating member 120 and the second rotation center O2 of the first connecting rod 130. A second link II can be formed between the second rotation center O2 and the third rotation center O3 of the first connecting rod 130. A third link III can be formed between the third rotation center O3 of the first connecting rod 130 and the fourth rotation center O4 of the latch 140. A fourth link IV can be formed between the fourth rotation center O4 of the latch 140 and the first rotation center O1 of the rotating member 120. That is, the rotating member 120, the first connecting rod 130, the latch 140, and the contact support 150 can cooperate to form a four-bar linkage structure. The operating mechanism 100 provided in this embodiment is a four-bar linkage operating mechanism.

[0069] In this embodiment, the lengths of the four links in the operating mechanism 100 have been redesigned. For some circuit breakers that do not require the contact mechanism 200 to play or mainly play the role of arc extinguishing, the space occupied by the operating mechanism 100 can be significantly reduced, which is conducive to the miniaturization design of the circuit breaker.

[0070] In some embodiments, the length of the first link I can be set to 3.25mm to 3.75mm. The length of the second link II can be set to 12.75mm to 13.25mm. The length of the third link III can be set to 4.98mm to 5.48mm. The length of the fourth link IV can be set to 14.35mm to 14.65mm. The following table shows the performance test data of the circuit breaker provided in this embodiment:

[0071] Table 1

[0072]

[0073]

[0074] like Figure 9As shown, the rotating component 120 may further include an integral rotating plate body 121 and a connecting bushing 122. The connecting bushing 122 may protrude from one side of the rotating plate body 121; specifically, the connecting bushing 122 may be located on the side of the rotating plate body 121 closest to the second housing 420. The connecting bushing 122 may be coaxial with the first rotation center O1. In this embodiment, the first rotating shaft 171 may pass through the connecting bushing 122 and the rotating plate body 121.

[0075] Combined again Figures 2 to 4 The operating mechanism 100 also includes a first torsion spring 181, which can be sleeved on the connecting bushing 122. In some embodiments, the first torsion spring 181 may include a first torsion spring body 1811, a first elastic arm 1812 and a second elastic arm 1813, which are respectively disposed at both ends of the first torsion spring body 1811.

[0076] Combined again Figure 9 In this embodiment, the first elastic arm 1812 can abut against the rotating member 120, that is, the first elastic arm 1812 and the rotating member 120 remain relatively fixed. Specifically, the rotating member 120 also includes a first limiting rod 123 protruding from the rotating plate body 121 near the connecting bushing 122. The first limiting rod 123 can be located on the clockwise side of the connection position between the first connecting rod 130 and the rotating member 120. The first elastic arm 1812 can abut against the side of the first limiting rod 123 away from the first connecting rod 130.

[0077] In some embodiments, a first limiting block 124 protrudes from the end of the first limiting rod 123 away from the rotating plate body 121. The first limiting block 124 may be located on the side of the first limiting rod 123 near the first elastic arm 1812. The first limiting block 124 can be used to restrict the first elastic arm 1812 from disengaging from the end of the first limiting rod 123 away from the rotating plate body 121.

[0078] When the circuit breaker switches from the closed state to the open state, the first elastic arm 1812 can provide a reset driving force for the rotating part 120.

[0079] The second elastic arm 1813 can extend to be opposite the latch 140. When the circuit breaker is in the open state, the end of the second elastic arm 1813 away from the first torsion spring body 1811 abuts against the end of the latch 140 away from the second rotating shaft 172, and can apply a counterforce to the latch 140 to rotate clockwise. Under the counterforce of the second elastic arm 1813, a secure fastening connection can be ensured between the first connecting rod 130, the latch 140, and the contact support 150.

[0080] When the circuit breaker is in the closed state, the end of the second elastic arm 1813 away from the first torsion spring body 1811 can abut against the housing assembly 400 and separate from the latch 140. That is, in the closed state, the latch 140 is not subjected to the pressure of the first torsion spring 181, thereby reducing the external force required to switch the circuit breaker from the closed state to the open state. In other words, when the circuit breaker switches from the closed state to the open state, only a small external force is required to trigger the operating mechanism to switch from the second state 100b to the first state 100a, so that the circuit breaker switches to the open state.

[0081] Combined again Figure 7 In some embodiments, the latch 140 may include an integral latch body 141, a second limiting rod 142, and a sleeve portion 144, with the second limiting rod 142 and the sleeve portion 144 protruding from the side of the latch body 141 away from the contact support 150. The sleeve portion 144 may be located at one end of the latch body 141 near the second rotating shaft 172, and the second rotating shaft 172 may pass sequentially through the sleeve portion 144 and the latch body 141.

[0082] The second limiting rod 142 can be located at the end of the latch body 141 away from the second rotating shaft 172, and the second limiting rod 142 is located on the side of the latch body 141 away from the first connecting rod 130. Around the second rotating shaft 172, the second limiting rod 142 is located on the clockwise side of the connection position between the first connecting rod 130 and the latch 140.

[0083] The end of the second limiting rod 142 away from the locking body 141 and the end of the sleeve portion 144 away from the locking body 141 can be connected by an adapter rod 143. In this embodiment, the first limiting groove 1402 can be formed on the locking body 141. In addition, the locking body 141, the second limiting rod 142, the sleeve portion 144 and the adapter rod 143 can cooperate to form a first through groove 1401, and the first through groove 1401 communicates with the first limiting groove 1402. When the circuit breaker is in the open state, the second elastic arm 1813 can abut against the side of the second limiting rod 142 away from the second rotating shaft 172.

[0084] In some embodiments, a second limiting block 145 protrudes from the end of the second limiting rod 142 away from the locking body 141. Parallel to the axial direction of the second rotating shaft 172, the second limiting block 145 can restrict the second elastic arm 1813 from disengaging from the end of the second limiting rod 142 away from the locking body 141.

[0085] Combined again Figure 10A third limiting block 421 protrudes from the side of the second housing 420 near the mounting cavity, and the third limiting block 421 is positioned between the latch 140 and the rotating member 120. The third limiting block 421 can be located on the movement path of the second elastic arm 1813. When the circuit breaker is in the closed state, the slope of the vertical line connecting the third limiting block 421 and the central axis of the first torsion spring 181 is greater than the slope of the vertical line connecting the second limiting rod 142 and the central axis of the first torsion spring 181. The slope of the vertical line is relative to the horizontal direction. The vertical line connecting the third limiting block 421 and the central axis of the first torsion spring 181 can be the line connecting the surface of the third limiting block 421 that abuts against the second elastic arm 1813 and the central axis of the first torsion spring 181, and the line is perpendicular to the axial direction of the first torsion spring 181. The vertical line connecting the second limiting rod 142 and the central axis of the first torsion spring 181 can be the line connecting the surface of the second limiting rod 142 that abuts against the second elastic arm 1813 and the central axis of the first torsion spring 181, and the line is perpendicular to the axial direction of the first torsion spring 181.

[0086] When the circuit breaker switches from the open state to the closed state, the second elastic arm 1813 can gradually rotate clockwise under the action of elastic force. During this process, the second elastic arm 1813 can gradually abut against the third limit block 421 and gradually separate from the latch 140.

[0087] Understandably, the first torsion spring 181 can be in a deformed state and store a certain amount of elastic potential energy. For example, the first torsion spring 181 can always be in a torsional state and has a tendency to detorse.

[0088] In other embodiments, the first torsion spring 181 may always be in an open state, with a tendency to close and tighten. Accordingly, the position of the first limiting rod 123 can be adjusted as needed.

[0089] In this embodiment, a first torsion spring 181 is provided, which can act on the rotating member 120 and the latch 140 respectively in corresponding states. That is, the first torsion spring 181 simultaneously realizes the functions of the rotating plate torsion spring and the latch torsion spring. As a result, the number of torsion springs in the operating mechanism 100 can be reduced, the structure of the operating mechanism 100 can be simplified, material costs can be reduced, and assembly efficiency can be improved.

[0090] like Figures 1 to 4 As shown, the moving contact 210 can be mounted on the side of the contact support 150 near the second housing 420. In some embodiments, the connecting end 211 of the moving contact 210 can be rotatably connected to the contact support 150 via the third rotating shaft 173.

[0091] Combined again Figure 11In this embodiment, the operating mechanism 100 further includes a contact torsion spring (i.e., a second torsion spring 182), which can be sleeved on the second rotating shaft 172. The second torsion spring 182 includes a second torsion spring body 1821, a third elastic arm 1822, and a fourth elastic arm 1823. The third elastic arm 1822 and the fourth elastic arm 1823 are respectively disposed at both ends of the second torsion spring body 1821. Among them, the third elastic arm 1822 can abut against the first housing 410, that is, the third elastic arm 1822 can be relatively fixed to the first housing 410.

[0092] A contact 210 has a protruding abutment plate 213 near the connecting end 211. The abutment plate 213 can extend from the side of the contact support 150 near the latch 140 to the side away from the latch 140. Additionally, the abutment plate 213 can be positioned relative to the side of the contact support 150 near the second rotating shaft 172. The fourth elastic arm 1823 can press against the side of the abutment plate 213 away from the contact support 150 and can apply a counterforce to the abutment plate 213 to rotate clockwise around the third rotating shaft 173. In this embodiment, the second torsion spring 182 can also always be in a torsional state.

[0093] When the circuit breaker is in the closed state, the second torsion spring 182 causes the contact end 212 of the moving contact 210 to apply pressure to the stationary contact 220, ensuring a stable and reliable connection between the moving contact 210 and the stationary contact 220. When the circuit breaker switches from the closed state to the open state, the second torsion spring 182 provides a reset driving force for the operating mechanism 100, driving the circuit breaker to open.

[0094] like Figures 2 to 4 As shown, in some embodiments, the latch 140 further includes a push plate 146. The push plate 146 may be disposed at one end of the latch body 141 near the second pivot 172, and the push plate 146 protrudes from the side of the latch body 141 away from the rotating member 120. Circumferentially around the second pivot 172, the push plate 146 may be located on the clockwise side of the connection position between the first connecting rod 130 and the latch 140.

[0095] In this embodiment, the electromagnetic trip unit 300 can be positioned opposite the end of the push plate 146 away from the latch body 141. Specifically, the push plate 146 can extend into the movement path of the push rod 310 in the electromagnetic trip unit 300. The push rod 310 can extend and push the push plate 146 to rotate counterclockwise around the second rotating shaft 172 in the event of a short circuit, thereby disrupting the steady state among the first connecting rod 130, the latch 140, and the contact support 150. This, in turn, can drive the operating mechanism 100 to reset under the action of the first torsion spring 181 and the second torsion spring 182, switching the circuit breaker from the closed state to the open state, thus realizing the line protection function.

[0096] In some embodiments, the area of ​​the surface of the push plate 146 opposite to the push rod 310 may be greater than the area of ​​the end face of the push rod 310 opposite to the push plate 146. This ensures that the push rod 310 can smoothly contact the push plate 146 and push the push plate 146 to rotate.

[0097] Of course, in other embodiments, it is not excluded that the area of ​​the surface of the push plate 146 opposite to the push rod 310 is set to be less than or equal to the area of ​​the end face of the push rod 310 opposite to the push plate 146.

[0098] In other embodiments, the push rod 310 may be positioned opposite other structural components such as the adapter rod 143 in the latch 140, or opposite the contact bracket 150.

[0099] When switching the circuit breaker from the open state to the closed state, the user can press the actuator 110 to slide it inwards towards the housing assembly 400. The movement of the actuator 110 is transmitted to the rotating member 120 through the second connecting rod 160, causing the rotating member 120 to rotate clockwise. When the rotating member 120 rotates clockwise, it can drive the first connecting rod 130 to move. Because the second end 132 of the first connecting rod 130, the latch 140, and the contact bracket 150 are in a stable connection state (i.e., steady state), the first connecting rod 130 can drive the latch 140 and the contact bracket 150 to rotate clockwise around the second rotating shaft 172, and cause the moving contact 210 to gradually abut against the stationary contact 220 to achieve the closing action.

[0100] When switching the circuit breaker from the closed state to the open state, the user can pull the actuator 110 relative to the housing assembly 400 to move the actuator 110 outward from the housing assembly 400. The external force applied to the actuator 110 can be transmitted to the four-bar linkage, which can disrupt the steady state among the first connecting rod 130, the latch 140, and the contact support 150. Under the action of the external force, the first torsion spring 181, and the second torsion spring 182, the operating mechanism 100 can gradually switch from the second state 100b to the first state 100a to achieve the opening action, that is, the circuit breaker switches to the open state.

[0101] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0102] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An operating mechanism, applied in a circuit breaker, said operating mechanism being used to drive the moving contact (210) and stationary contact (220) in the circuit breaker to close and open, characterized in that, The operating mechanism includes a rotating component (120), a first connecting rod (130), a latch (140), an actuating component (110), a second connecting rod (160), and a contact support (150). The first connecting rod (130) includes a first end (131) and a second end (132). The first end (131) is rotatably connected to the rotating member (120), and the second end (132) is rotatably connected to the latch (140) and the contact bracket (150). The contact bracket (150) is used to connect the moving contact (210). The actuator (110) is slidably disposed on the side of the rotating member (120) away from the latch (140), one end of the second connecting rod (160) is rotatably connected to the actuator (110), and the other end of the second connecting rod (160) is rotatably connected to the rotating member (120); The rotating component (120) includes a first rotation center O1, the first end (131) includes a second rotation center O2, the second end (132) includes a third rotation center O3, and the latch (140) and the contact bracket (150) include a common fourth rotation center O4. The distance between the first rotation center O1 and the second rotation center O2 is 3.25mm~3.75mm, the distance between the second rotation center O2 and the third rotation center O3 is 12.75mm~13.25mm, the distance between the third rotation center O3 and the fourth rotation center O4 is 4.98mm~5.48mm, and the distance between the fourth rotation center O4 and the first rotation center O1 is 14.35mm~14.65mm. The latch (140) includes a first through groove (1401) and a first limiting groove (1402) that are connected to each other, and the contact bracket (150) includes a second through groove (1501) and a second limiting groove (1502) that are connected to each other. At least during the process of switching the moving contact (210) and the stationary contact (220) from open to closed, the second end (132) is simultaneously confined in the first limiting groove (1402) and the second limiting groove (1502), and the second end (132), the latch (140) and the contact support (150) remain in a steady state.

2. The operating mechanism according to claim 1, characterized in that, The distance between the first rotation center O1 and the second rotation center O2 is 3.40mm~3.50mm, the distance between the second rotation center O2 and the third rotation center O3 is 12.85mm~13.00mm, the distance between the third rotation center O3 and the fourth rotation center O4 is 5.20mm~5.35mm, and the distance between the fourth rotation center O4 and the first rotation center O1 is 14.40mm~14.50mm.

3. The operating mechanism according to claim 1, characterized in that, The latch (140) further includes a first abutting part (1411), which abuts against the side of the second end (132) near the second through groove (1501) and limits the second end (132) in the second limiting groove (1502); The contact support (150) further includes a second abutment (151), which abuts against the side of the second end (132) near the first through groove (1401) and limits the second end (132) in the first limiting groove (1402).

4. A circuit breaker, characterized in that, Includes the operating mechanism as described in any one of claims 1 to 3.

5. The circuit breaker according to claim 4, characterized in that, The circuit breaker also includes a moving contact (210) and a stationary contact (220). The moving contact (210) is connected to the end of the contact support (150) away from the first connecting rod (130); The operating mechanism is used to move the moving contact (210) closer to or further away from the stationary contact (220) to close or open the circuit; The stationary contact (220) is located on the movement path of the moving contact (210).

6. The circuit breaker according to claim 5, characterized in that, The circuit breaker includes a closed state and an open state, the moving contact (210) is rotatably connected to the contact bracket (150), and the operating mechanism also includes a contact torsion spring; When the circuit breaker is in the closed state, the contact torsion spring can drive the moving contact (210) to apply a resistance force to the stationary contact (220); When the circuit breaker switches from the closed state to the open state, the contact torsion spring can drive the operating mechanism to move to the open state.

7. The circuit breaker according to any one of claims 4 to 6, characterized in that, The circuit breaker also includes an electromagnetic trip unit (300), which includes a push rod (310). When the moving contact (210) and the stationary contact (220) are closed, the latch (140) or the contact bracket (150) is located on the movement path of the push rod (310).

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