An operating mechanism and circuit breaker

Abstract

The application provides an operating mechanism and a circuit breaker, and relates to the technical field of electrical equipment. The operating mechanism comprises a shell, a static contact, a moving contact, a mechanism seat, a connecting piece, a driving assembly, a lock catch and a first reset member arranged on the shell. The mechanism seat and the moving contact are in abutment with the connecting piece. The driving assembly is in transmission connection with the mechanism seat and is used for driving the mechanism seat to move, so as to drive the moving contact to close or open the static contact through the connecting piece. In the closed state, the first reset member is in abutment with the connecting piece to provide an abutment force, which not only abuts against the moving contact through the connecting piece to provide a contact pressure of the moving contact on the static contact, but also abuts against the mechanism seat through the connecting piece to provide a force for driving the mechanism seat to move the moving contact away from the static contact. Therefore, the operating mechanism has simple structure, small space volume and compact overall structure.

Description

Technical Field

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

[0002] In power distribution systems, circuit breakers are typically used to quickly interrupt fault current when the system encounters overload or short-circuit faults, thereby ensuring the safety of the power distribution system and the integrity of electrical equipment. The structure and dynamic characteristics of the operating mechanism within the circuit breaker have a decisive influence on its breaking capacity.

[0003] The operating mechanism in current circuit breakers has a complex structure and a large number of parts. For example, it requires a lot of torsion springs to realize the transmission action of the operating mechanism, which makes the circuit breaker larger in size. Summary of the Invention

[0004] This invention provides an operating mechanism and a circuit breaker with a simple and compact structure. The mechanism seat can be subjected to a reset force or the moving contact can be subjected to a contact pressure through the connecting parts, which reduces the use of related parts and thus reduces the size of the circuit breaker.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides an operating mechanism, comprising:

[0007] case;

[0008] A stationary contact, wherein the stationary contact is disposed in the housing;

[0009] A moving contact, which is movably disposed within the housing;

[0010] A mechanism base, which is movably disposed within the housing;

[0011] The connecting member, the mechanism seat and the moving contact both abut against the connecting member;

[0012] A first reset element is disposed on the housing and acts on the connector;

[0013] A drive assembly is connected to the mechanism base in a transmission manner. During the closing process, the drive assembly drives the mechanism base to move, so that the mechanism base drives the connecting member to move, so that the connecting member drives the moving contact to close. During the opening process, the drive assembly drives the mechanism base to move, so that the mechanism base drives the moving contact to open.

[0014] In the closed state, the first reset member abuts against the connecting member to provide abutting force. On the one hand, the connecting member abuts against the moving contact to provide the contact pressure of the moving contact on the stationary contact; on the other hand, the connecting member abuts against the mechanism seat to provide the force that drives the moving contact to move away from the stationary contact.

[0015] In an optional embodiment, the housing is provided with a rotating shaft, and the mechanism seat, the moving contact, and the connecting member are all rotatably disposed on the rotating shaft. The first reset member is a torsion spring structure and is disposed on the rotating shaft. The connecting member is also provided with a reset abutment portion. One end of the first reset member abuts against the limiting post of the housing, and the other end abuts against the reset abutment portion. The reset abutment portion, the mechanism abutment portion, and the contact abutment portion are respectively located on both sides of the rotating shaft.

[0016] In an optional embodiment, the connector is provided with a clearance hole, the rotating shaft passes through the clearance hole, and the connector can rotate relative to the rotating shaft.

[0017] The clearance hole has a first end and a second end; during the process in which the driving assembly drives the moving contact to contact the stationary contact and is in overtravel, the connecting member moves along the extension direction of the clearance hole, and the rotating shaft moves from the first end to the second end relative to the clearance hole.

[0018] In an optional embodiment, the drive assembly includes a handle, a connecting rod, and a second reset member. The handle, the connecting rod, and the mechanism seat are sequentially connected in a transmission manner. The second reset member is disposed in the housing and acts on the handle. The second reset member is used to drive the handle to move when the connecting rod is disengaged from the latch, so as to drive the connecting rod to move to the open state.

[0019] In an optional embodiment, the operating mechanism further includes a third reset member, one end of which abuts against the latch and the other end against the mechanism seat. The third reset member is used to reset the latch to the locked state when the drive assembly disengages from the latch.

[0020] In an optional embodiment, the mechanism seat is provided with a slide groove, one end of the connecting rod is connected to the handle, and the other end is movably disposed in the slide groove, and the connecting rod can move along the slide groove when the mechanism seat is disengaged from the lock.

[0021] In an optional embodiment, the latch is provided with a third abutting part, a fourth abutting part and a fifth abutting part, the mechanism seat is provided with a sixth abutting part, one end of the third reset member abuts against the third abutting part and the other end abuts against the sixth abutting part; the fourth abutting part is used to abut against the mechanism seat and the fifth abutting part is used to abut against the connecting rod.

[0022] In an optional embodiment, the operating mechanism further includes a release element disposed on the housing, the release element being used to drive the latch away from the mechanism seat connection, so as to disengage the mechanism seat from the latch.

[0023] In a second aspect, the present invention provides a circuit breaker, including a circuit board and an operating mechanism as described in any of the foregoing embodiments, wherein the circuit board is disposed within the housing.

[0024] The beneficial effects of the operating mechanism and circuit breaker provided in this embodiment of the invention include: The two parts of the connecting member abut against the mechanism seat and the moving contact, respectively. Therefore, during the closing process, while the driving component drives the mechanism seat to rotate, the mechanism seat drives the connecting member to rotate synchronously, and the connecting member drives the moving contact to rotate, thereby achieving the closing of the moving contact and the stationary contact. During the opening process, the driving component drives the mechanism seat to move, so that the mechanism seat drives the moving contact and the stationary contact to open. In the closed state, the first reset member abuts against the connecting member and provides abutment force. On the one hand, the connecting member abuts against the connecting member and provides abutment force. Under the abutment of the reset member, the moving contact tends to move further toward the stationary contact. Specifically, the connecting member applies a rotational force to the moving contact in a first direction toward the stationary contact, thereby increasing the contact pressure exerted by the moving contact on the stationary contact and preventing the moving and stationary contacts from separating due to repulsive forces, thus improving the stability of the circuit breaker. On the other hand, the connecting member abuts against the mechanism seat under the action of the first reset member, providing a force in a second direction that moves the mechanism seat and the moving contact away from the stationary contact, ultimately resetting the moving contact, connecting member, and mechanism seat to the open position. Therefore, the operating mechanism provided in this embodiment of the invention has a simple structure and a compact overall design. It can apply a reset force to the mechanism seat or a contact pressure to the moving contact using only the connecting member, reducing the number of related components and thus reducing the size of the circuit breaker. Attached Figure Description

[0025] 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.

[0026] Figure 1This is a schematic diagram of the operating mechanism in the tripping state provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the overtravel state structure of the operating mechanism provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the operating mechanism in the closed state provided in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the operating mechanism in the tripped state provided in an embodiment of the present invention;

[0030] Figure 5 This is one of the schematic diagrams of the operating mechanism provided in an embodiment of the present invention;

[0031] Figure 6 An exploded view of the operating mechanism portion of the embodiment of the present invention;

[0032] Figure 7 This is a second schematic diagram of the structure of the operating mechanism provided in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram showing the overtravel state of the operating mechanism provided in an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram showing the corresponding closing state of the operating mechanism provided in an embodiment of the present invention.

[0035] Icons: 10-Operating mechanism; 100-Housing; 110-Rotating shaft; 120-Limiting post; 200-Stationary contact; 300-Moving contact; 310-Second abutment part; 400-Mechanism seat; 410-First abutment part; 420-Slide groove; 430-Sixth abutment part; 500-Connector; 510-Mechanism abutment part; 520-Contact abutment part; 530-Reset abutment part; 540-Leaving hole; 541-First end; 542-Second end; 600-Drive assembly; 610-Handle; 620-Connecting rod; 630-Second reset part; 700-First reset part; 800-Lock; 810-Third abutment part; 820-Fourth abutment part; 830-Fifth abutment part; 900-Third reset part; 1000-Releasing part. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are 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, and therefore should not be construed as a limitation of this invention.

[0040] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0041] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0042] In power distribution systems, circuit breakers are typically used to quickly interrupt fault current when the system encounters overload or short-circuit faults, thereby ensuring the safety of the power distribution system and the integrity of electrical equipment. The structure and dynamic characteristics of the operating mechanism within the circuit breaker have a decisive influence on its breaking capacity.

[0043] The operating mechanism in current circuit breakers has a complex structure and a large number of parts. For example, it requires a lot of torsion springs to realize the transmission action of the operating mechanism, which makes the circuit breaker larger in size.

[0044] Based on the problems existing in the current technology, please refer to Figures 1 to 9 This invention provides a circuit breaker, which includes an operating mechanism 10, and is applied to electrical equipment, particularly low-voltage electrical equipment. The circuit breaker provided by this invention has a simple structure, small volume, compact overall structure, and low rotational inertia of the moving contact 300.

[0045] In detail, the operating mechanism 10 includes a housing 100, a stationary contact 200, a moving contact 300, a mechanism base 400, a connector 500, a drive assembly 600, a first reset component 700, and a latch 800.

[0046] The stationary contact 200, the moving contact 300, the mechanism seat 400, the connector 500, the drive assembly 600, and the first reset member 700 are all disposed in the housing 100, while the moving contact 300 and the mechanism seat 400 are both movably disposed in the housing 100.

[0047] Both the mechanism base 400 and the moving contact 300 abut against the connecting member 500; the drive assembly 600 is connected to the mechanism base 400 in a transmission manner. During the closing process, the drive assembly 600 is used to drive the mechanism base 400 to move, so that the mechanism base 400 drives the connecting member 500 to move, so that the connecting member 500 drives the moving contact 300 to close; during the opening process, the drive assembly 600 is used to drive the mechanism base 400 to move, so that the mechanism base 400 directly drives the moving contact 300 to open.

[0048] Furthermore, in the closed state, the first reset member 700 abuts against the connector 500 to provide abutting force. On the one hand, the connector 500 abuts against the moving contact 300 to provide contact pressure between the moving contact 300 and the stationary contact 200. On the other hand, under the action of the first reset member 700, the connector 500 also abuts against the mechanism seat 400 to provide a force for the mechanism seat 400 to drive the moving contact 300 to move away from the stationary contact.

[0049] In this embodiment, two parts of the connector 500 abut against the mechanism base 400 and the moving contact 300, respectively. The abutment of the two parts on both sides allows the moving contact 300 and the mechanism base 400 to remain relatively fixed before the moving contact 300 contacts the stationary contact 200 during the closing process. Therefore, during the closing process, while the drive assembly 600 drives the mechanism base 400 to rotate, the mechanism base 400 will drive the connector 500 to rotate synchronously, and through the connector 500, drive the moving contact 300 to rotate, thereby realizing the closing of the moving contact 300 and the stationary contact 200. During the opening process, the drive assembly 600 drives the mechanism base 400 to move, so that the mechanism base 400 drives the moving contact 300 to open the circuit.

[0050] Furthermore, in the closed state, because the first reset member 700 abuts against the connector 500 and provides it with abutting force, on the one hand, the connector 500, under the abutting action of the first reset member 700, also tends to move further toward the stationary contact 200. That is, the connector 500 applies a force to the moving contact 300 in a first direction toward the stationary contact 200 (counterclockwise direction in the figure) to increase the contact pressure of the moving contact 300 on the stationary contact 200, preventing the moving contact 300 and the stationary contact 200 from being separated by repulsive force, thereby improving the stability of the circuit breaker. On the other hand, the connector 500 abuts against the mechanism seat 400 under the action of the first reset member 700 to provide the mechanism seat 400 and a force to rotate the moving contact 300 away from the stationary contact 200 in a second direction (clockwise direction in the figure), ultimately realizing the reset of the moving contact 300, the connector 500, and the mechanism seat 400 to the open position.

[0051] As can be seen, the operating mechanism 10 provided in this embodiment of the invention has a simple structure and a compact overall structure. It can apply a reset force to the mechanism base 400 or a contact pressure to the moving contact 300 through the connecting member 500, thereby reducing the use of related parts and thus reducing the size of the circuit breaker.

[0052] Furthermore, the connector 500 is provided with a mechanism abutment portion 510 and a contact abutment portion 520, the mechanism seat 400 is provided with a first abutment portion 410, and the mechanism abutment portion 510 abuts against the first abutment portion 410; the moving contact 300 is provided with a second abutment portion 310, and the contact abutment portion 520 abuts against the second abutment portion 310, so that the moving contact 300 and the mechanism seat 400 remain relatively fixed before the circuit is closed and the moving contact 300 contacts the stationary contact 200.

[0053] In this embodiment, by providing two abutment portions, namely mechanism abutment portion 510 and contact abutment portion 520, the mechanism abutment portion 510 abuts against the first abutment portion 410 of the mechanism seat 400, thereby enabling the mechanism seat 400 to drive the connector 500 to move under the drive of the drive assembly 600, and thereby abut against the moving contact 300 through the connector 500, thereby increasing the contact pressure between the moving contact 300 and the stationary contact 200.

[0054] When the drive assembly 600 is disengaged from the latch 800, the connector 500 can still be driven to move under the action of the first reset member 700, thereby driving the mechanism base 400 to reset to the open state, and the moving contact 300 is also reset to the open state by the mechanism base 400; and in the open state, the mechanism base 400 and the moving contact 300 can be locked to each other.

[0055] In detail, the connector 500 is plate-shaped, the mechanism abutment portion 510 is bent relative to the plane of the connector 500 in the direction toward the mechanism seat 400, and the first abutment portion 410 is provided in the recess of the side wall of the mechanism seat 400. Therefore, the mechanism abutment portion 510 can extend into the recess and stably abut against the first abutment portion 410. The contact abutment portion 520 is recessed, and the second abutment portion 310 of the moving contact 300 is bent relative to the plane of the moving contact 300 in the direction toward the connector 500. Therefore, the second abutment portion 310 of the moving contact 300 extends into the recessed contact abutment portion 520 of the connector 500 and stably abuts against it.

[0056] Furthermore, the housing 100 is provided with a rotating shaft 110, and the mechanism seat 400, the moving contact 300, and the connecting member 500 are all rotatably mounted on the rotating shaft 110. The first reset member 700 is a torsion spring structure and is mounted on the rotating shaft 110. The connecting member 500 is also provided with a reset abutment part 530. The reset abutment part 530 has a bent structure. One end of the first reset member 700 abuts against the limiting post 120 of the housing 100, and the other end abuts against the reset abutment part 530. The reset abutment part 530, the mechanism abutment part 510, and the contact abutment part 520 are respectively located on both sides of the rotating shaft 110.

[0057] In this embodiment, the mechanism base 400, the moving contact 300, and the connector 500 are arranged on the rotating shaft 110 in at least an overlapping manner from top to bottom, thereby achieving coaxial installation of the mechanism base 400 and the moving contact 300, which occupies less space.

[0058] The first reset member 700 is an elastic element; specifically, it can be, but is not limited to, a torsion spring. Therefore, because one end of the first reset member 700 abuts against the limiting post 120 of the housing 100, and the other end abuts against the reset member abutment portion of the connector 500, during the closing process, when the drive assembly 600 drives the mechanism seat 400 to rotate, thereby causing the connector 500 to rotate in the second direction, the first reset member 700 is simultaneously compressed by the connector 500. In the closed state, the mechanism seat 400 abuts against the mechanism seat 400 abutment portion of the connector 500 under the action of the drive assembly 600, thereby causing the contact abutment portion 520 of the connector 500 to abut against the moving contact 300, thus applying a force rotating in the second direction to the moving contact 300, thereby increasing the contact pressure between the moving contact 300 and the stationary contact 200.

[0059] Once the drive assembly 600 disengages from the latch 800, the first reset member 700 generates an elastic restoring force and acts on the connector 500 to apply a force that rotates in the first direction to the connector 500. Therefore, the connector 500 drives the mechanism base 400 to rotate in a direction away from the stationary contact 200, and the moving contact 300 also rotates away from the stationary contact 200 under the drive of the mechanism base 400, thereby resetting the mechanism base 400 and the moving contact 300 to the open position.

[0060] Furthermore, the drive assembly 600 includes a handle 610, a connecting rod 620, and a second reset member 630. The handle 610, the connecting rod 620, and the mechanism base 400 are sequentially connected in a transmission manner. The second reset member 630 is disposed in the housing 100 and acts on the handle 610. The second reset member 630 is used to drive the handle 610 to move when the connecting rod 620 is disengaged from the latch 800, so as to drive the connecting rod 620 to move to the open state.

[0061] In this embodiment, the handle 610 is rotatably disposed on the housing 100 and one end extends out of the housing 100, so that the user can manually operate the handle 610 to close or open the circuit.

[0062] Optionally, the second reset member 630 may be, but is not limited to, a torsion spring; during the reset process, in addition to the first reset member 700 driving the connecting member 500 to move along the first direction, and thereby driving the moving contact 300 away from the stationary contact 200 through the mechanism seat 400, the second reset member 630 also drives the handle 610 to the open position, and the connecting rod 620 can also play a certain reset role on the mechanism seat 400 under the drive of the handle 610.

[0063] However, during the closing process, when the handle 610 drives the connecting rod 620, the mechanism seat 400 and the moving contact 300, an "overtravel" problem usually occurs. Based on this, the connector 500 is provided with a clearance hole 540, and the rotating shaft 110 passes through the clearance hole 540, so that the connector 500 can rotate relative to the rotating shaft 110.

[0064] The clearance hole 540 has a first end 541 and a second end 542. During the process when the drive assembly 600 drives the moving contact 300 to contact the stationary contact 200 and is in overtravel, the connecting member 500 moves along the extension direction of the clearance hole 540, and the rotating shaft 110 moves from the first end 541 to the second end 542 relative to the clearance hole 540. That is, the axis of the connecting member 500 is offset relative to the axis of the rotating shaft 110, so that the contact point between the connecting member 500 and the moving contact 300 changes. At this time, the moving contact 300 contacts the stationary contact 200, and the moving contact 300 and the mechanism seat 400 undergo relative displacement until the closing is completed.

[0065] In this embodiment, during the closing process, the handle 610 drives the mounting base to rotate via the connecting rod 620, and the mounting base drives the connecting member 500 and the moving contact 300 to rotate until the moving contact 300 contacts the stationary contact 200, while the connecting member 500 compresses the first reset member 700; Figure 2 and Figure 8 As shown, after the moving contact 300 and the stationary contact 200 just come into contact, that is, during the process of the handle 610 driving the moving contact 300 to close the circuit and being in an overtravel state, the handle 610 continues to drive the mounting base to rotate, and the mounting base drives the connecting member 500 to move. The connecting member 500 further compresses the first reset member 700. During this process, the connecting member 500 is relatively displaced relative to the relief hole 540 under the action of the mechanism seat 400, so that the rotating shaft 110 is relatively displaced from the first end 541 to the second end 542 in the relief hole 540. This causes the axis of the connecting member 500 to shift relative to the axis of the rotating shaft 110, changing the contact point between the connecting member 500 and the moving contact 300. The moving contact 300 and the mechanism seat 400 undergo relative displacement until the closing is completed. Figure 3 and Figure 9 As shown, at this time, the moving contact 300 and the stationary contact 200 are in the closed state and in the overtravel end state. Thus, the overtravel is completed through the clearance hole 540, reducing the movement space of the moving contact 300 and thus saving space.

[0066] During the overtravel process, the mechanism seat 400 drives the connector 500 to move and further compresses the first reset member 700. Under this condition, the connector 500 tends to move in the second direction under the abutment action of the mechanism seat 400, thereby causing the contact abutment portion 520 of the connector 500 to further abut the second abutment portion 310 of the moving contact 300, thereby increasing the pressure of the moving contact 300 on the stationary contact 200.

[0067] Furthermore, the operating mechanism 10 also includes a latch 800 and a third reset member 900. The latch 800 is disposed on the rotating shaft 110. One end of the third reset member 900 abuts against the latch 800 and the other end abuts against the mechanism seat 400. The third reset member 900 is used to make the latch 800 abut against the mechanism seat 400.

[0068] In this embodiment, the latch 800 is also coaxially arranged with the mechanism seat 400, the moving contact 300 and the connector 500, thereby reducing the number of parts inside the housing 100 and increasing the internal space of the housing 100.

[0069] The third reset member 900 may be, but is not limited to, a torsion spring; it abuts against the mechanism seat 400 through the latch 800 to lock the connecting rod 620 of the drive assembly 600 to the mechanism seat 400. When the connecting rod 620 of the drive assembly 600 is disengaged from the latch 800, the third reset member 900 resets the latch 800 to the locked state.

[0070] Furthermore, the mechanism seat 400 is provided with a slide groove 420, one end of the connecting rod 620 is connected to the handle 610, and the other end is movably disposed in the slide groove 420. The connecting rod 620 can move along the slide groove 420 when the mechanism seat 400 is disengaged from the lock 800.

[0071] In this embodiment, the latch 800 is also used to abut against the connecting rod 620 to restrict and fix the connecting rod 620 to one end of the slide groove 420, thereby enabling the mechanism seat 400 to move via the connecting rod 620 when the handle 610 is turned. When the circuit breaker is in an abnormal state, the latch 800 can be released to release the restriction on the connecting rod 620 and the mechanism seat 400. In this case, the connecting member 500 rotates along the first direction under the action of the first reset member 700, and the connecting member 500 drives the mechanism seat 400 to rotate along the first direction. At this time, the connecting rod 620 can move along the extension direction of the slide groove 420 to the other end of the slide groove 420, and finally reset the mechanism seat 400 and the moving contact 300 to the open position.

[0072] Furthermore, the latch 800 is provided with a third abutment part 810, a fourth abutment part 820 and a fifth abutment part 830, the mechanism seat 400 is provided with a sixth abutment part 430, one end of the third reset member 900 abuts with the third abutment part 810 and the other end abuts with the sixth abutment part 430; the fourth abutment part 820 is used to abut with the mechanism seat 400, and the fifth abutment part 830 is used to abut with the connecting rod 620.

[0073] In this embodiment, the fourth abutment portion 820 and the fifth abutment portion 830 of the latch 800 abut against the mechanism seat 400 and the connecting rod 620 respectively, so that the connecting rod 620 and the mechanism seat 400 are in a relatively fixed locked state; and the two ends of the third reset member 900 abut against the third abutment portion 810 and the sixth abutment portion 430 respectively, so that the latch 800, the mechanism seat 400 and the connecting rod 620 are kept in a locked state, so that the mechanism seat 400 can be driven to move by the connecting rod 620.

[0074] Furthermore, in order for the latch 800 to achieve automatic release, the operating mechanism 10 also includes a release element 1000, which is disposed in the housing 100. The release element 1000 is used to drive the latch 800 away from the mechanism seat 400 connection so that the mechanism seat 400 is released from the latch 800.

[0075] In this embodiment, the tripping component 1000, the moving contact 300, and the stationary contact 200 form a main circuit. When the main circuit current is abnormal, the push rod extends and abuts against the tripping component 1000, causing the fourth abutting part 820 and the fifth abutting part 830 of the tripping component 1000 to disengage from the mechanism seat 400 and the connecting rod 620, thereby causing the connecting rod 620 to disengage from the latch 800. In this process, the latch 800 also compresses the third reset component 900, so that the third reset component 900 generates an elastic restoring force after the push rod of the tripping component 1000 retracts, acting on the latch 800 and causing the latch 800 to reset to the state of abutting against the mechanism seat 400 and the connecting rod 620.

[0076] In summary, the embodiments of the present invention provide an operating mechanism 10 and a circuit breaker. During the closing process, the driving component 600 drives the mechanism base 400 to move, so that the mechanism base 400 drives the connecting member 500 to move, so that the connecting member 500 drives the moving contact 300 to close. During the opening process, the driving component 600 drives the mechanism base 400 to move, so that the mechanism base 400 directly drives the moving contact 300 to open. Furthermore, in the closed state, the first reset member 700 abuts against the connecting member 500 to provide abutting force. On the one hand, the connecting member 500 abuts against the moving contact 300 to provide contact pressure between the moving contact 300 and the stationary contact 200; on the other hand, under the action of the first reset member 700, the connecting member 500 also abuts against the mechanism base 400 to provide a force that drives the mechanism base 400 to move the moving contact 300 away from the stationary contact.

[0077] In the closed state, the connector 500 abuts against the first reset member 700, and one end of the connector 500 abuts against the mechanism seat 400, providing the mechanism seat 400 with a reset force away from the stationary contact; one end of the connector 500 abuts against the first reset member 700, and the other end abuts against both the mechanism seat 400 and the moving contact 300. The mechanism seat 400 is abutted to the closed position by the connecting rod 620 and cannot move. The connector 500 abuts against the top of the mechanism seat 400 and cannot move, while abutting against the moving contact 300 so that the moving contact 300 cannot disengage from the abutting state, that is, the contact pressure is provided by the abutting force.

[0078] As can be seen, the operating mechanism 10 provided in this embodiment of the invention has a simple structure and a compact overall structure. It can apply a reset force to the mechanism base 400 or a contact pressure to the moving contact 300 through the connecting member 500, thereby reducing the use of related parts and thus reducing the size of the circuit breaker.

[0079] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An operating mechanism (10), characterized in that, include: Casing (100); A stationary contact (200) is disposed in the housing (100); A movable contact (300) is movably disposed in the housing (100); A mechanism base (400) is movably disposed on the housing (100); The connector (500) is in contact with both the mechanism seat (400) and the moving contact (300); A first reset member (700) is disposed on the housing (100) and acts on the connector (500); A drive assembly (600) is connected to the mechanism base (400) in a transmission manner. During the closing process, the drive assembly (600) drives the mechanism base (400) to move, so that the mechanism base (400) drives the connecting member (500) to move, so that the connecting member (500) drives the moving contact (300) to close. During the opening process, the drive assembly (600) drives the mechanism base (400) to move, so that the mechanism base (400) drives the moving contact (300) to open. In the closed state, the first reset member (700) abuts against the connector (500) to provide abutment force. On the one hand, the connector (500) abuts against the moving contact (300) to provide contact pressure between the moving contact (300) and the stationary contact (200); on the other hand, the connector (500) abuts against the mechanism seat (400) to provide a force that drives the moving contact (300) to move away from the stationary contact.

2. The operating mechanism (10) according to claim 1, characterized in that, The connector (500) is provided with a mechanism abutment (510) and a contact abutment (520). The mechanism seat (400) is provided with a first abutment (410), and the mechanism abutment (510) abuts against the first abutment (410). The moving contact (300) is provided with a second abutment (310), and the contact abutment (520) abuts against the second abutment (310).

3. The operating mechanism (10) according to claim 2, characterized in that, The housing (100) is provided with a rotating shaft (110). The mechanism seat (400), the moving contact (300), and the connecting member (500) are rotatably disposed on the rotating shaft (110). The first reset member (700) is a torsion spring structure and is disposed on the rotating shaft (110). The connecting member (500) is also provided with a reset abutment part (530). One end of the first reset member (700) abuts against the limiting post (120) of the housing (100), and the other end abuts against the reset abutment part (530). The reset abutment part (530), the mechanism abutment part (510), and the contact abutment part (520) are respectively located on both sides of the rotating shaft (110).

4. The operating mechanism (10) according to claim 3, characterized in that, The connector (500) is provided with a clearance hole (540), the rotating shaft (110) passes through the clearance hole (540), and the connector (500) can rotate relative to the rotating shaft (110); The clearance hole (540) has a first end (541) and a second end (542); during the process in which the drive assembly (600) drives the moving contact (300) to contact the stationary contact (200) and is in overtravel, the connector (500) moves along the extension direction of the clearance hole (540), and the rotating shaft (110) moves relative to the clearance hole (540) from the first end (541) to the second end (542).

5. The operating mechanism (10) according to claim 1, characterized in that, The operating mechanism (10) further includes a latch (800), which is disposed on the housing (100) and is used to lock the drive assembly (600) to the mechanism seat (400); The drive assembly (600) includes a handle (610), a connecting rod (620), and a second reset member (630). The handle (610), the connecting rod (620), and the mechanism seat (400) are sequentially connected in a transmission manner. The second reset member (630) is disposed in the housing (100) and acts on the handle (610). The second reset member (630) is used to drive the handle (610) to move when the connecting rod (620) is disengaged from the latch (800), so as to drive the connecting rod (620) to move to the open state.

6. The operating mechanism (10) according to claim 5, characterized in that, The operating mechanism (10) further includes a third reset member (900), one end of which abuts against the latch (800) and the other end of which abuts against the mechanism seat (400). The third reset member (900) is used to reset the latch (800) to the locked state when the drive assembly (600) disengages from the latch (800).

7. The operating mechanism (10) according to claim 6, characterized in that, The mechanism base (400) is provided with a slide groove (420). One end of the connecting rod (620) is connected to the handle (610), and the other end is movably disposed in the slide groove (420). The connecting rod (620) can move along the slide groove (420) when the mechanism base (400) is disengaged from the latch (800).

8. The operating mechanism (10) according to claim 6, characterized in that, The latch (800) is provided with a third abutment (810), a fourth abutment (820) and a fifth abutment (830), and the mechanism seat (400) is provided with a sixth abutment (430). One end of the third reset member (900) abuts against the third abutment (810) and the other end abuts against the sixth abutment (430). The fourth abutment (820) is used to abut against the mechanism seat (400), and the fifth abutment (830) is used to abut against the connecting rod (620).

9. The operating mechanism (10) according to claim 6, characterized in that, The operating mechanism (10) further includes a release member (1000), which is disposed on the housing (100). The release member (1000) is used to drive the latch (800) away from the mechanism seat (400) connection so that the mechanism seat (400) is disengaged from the latch (800).

10. A circuit breaker, characterized in that, It includes a circuit board and an operating mechanism (10) as described in any one of claims 1-9, wherein the circuit board is disposed within the housing (100).

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