Operating mechanism and circuit breaker

Abstract

The operation mechanism and circuit breaker relate to the low-voltage electrical technology field. The operation mechanism comprises a housing and a handle, a static contact, a moving contact and an electromagnet mechanism in the housing respectively, the electromagnet mechanism and the moving contact are in transmission connection with the handle respectively; the electromagnet mechanism drives the handle to move, and the handle can drive the moving contact to move to close or open the static contact. The circuit breaker comprises the operation mechanism. The operation mechanism can improve the opening and closing speed of the circuit breaker.

Description

Technical Field

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

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. When faults such as leakage, overload, or short circuit occur in the system, the circuit breaker can quickly disconnect the faulty mechanism in the system or cut off the entire power supply to prevent the fault from escalating and avoid causing huge economic losses and casualties.

[0003] Most existing circuit breakers use a drive motor to drive the operating mechanism, thereby controlling the opening or closing of the circuit breaker. However, this motor-driven method usually requires multiple meshing gears to work together to achieve transmission. On the one hand, this reduces the transmission efficiency of the circuit breaker, thus slowing down the opening and closing speed; on the other hand, because the motor-driven method requires many components, the wear between these components increases, leading to a reduction in the lifespan of the circuit breaker. Summary of the Invention

[0004] The purpose of this invention is to provide an operating mechanism and a circuit breaker that can improve the opening and closing speed of the circuit breaker.

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

[0006] In one aspect, the present invention provides an operating mechanism comprising a housing and a handle, a stationary contact, a moving contact, and an electromagnet mechanism respectively located within the housing. The electromagnet mechanism and the moving contact are respectively throttle-connected to the handle. The electromagnet mechanism drives the handle to move, and the handle can drive the moving contact to move to close or open the circuit breaker with the stationary contact. This operating mechanism can improve the opening and closing speed of the circuit breaker.

[0007] Optionally, the electromagnet mechanism includes a tripping electromagnet and a closing electromagnet. The closing electromagnet drives the handle to move to close the circuit; the tripping electromagnet drives the handle to move to open the circuit.

[0008] Optionally, the operating mechanism also includes a latch rotatably connected within the housing, the latch being located between the handle and the moving contact; the latch is used to lock the handle when closing and to unlock the handle when opening.

[0009] Optionally, the latch includes a first body and a hook portion disposed on the first body. The hook portion is located on the side of the first body near the handle. The handle is provided with a hook that cooperates with the hook portion. When the circuit is closed, the hook is engaged with the hook portion to lock the handle and the moving contact.

[0010] Optionally, the operating mechanism also includes a latch spring, one end of which is connected to the latch and the other end of which is connected to the housing; the latch spring is used to provide elastic force to the latch so that the latch tends to lock with the handle.

[0011] Optionally, the operating mechanism also includes a trip lever rotatably connected to the housing, with one end of the trip lever abutting against the latch and the other end abutting against the trip electromagnet; the trip electromagnet drives the trip lever to rotate, and the trip lever can drive the latch to rotate so that the latch and the handle are unlocked.

[0012] Optionally, the operating mechanism also includes a reset spring, which provides elastic force to the trip lever so that the end of the trip lever near the trip electromagnet tends to move toward the trip electromagnet.

[0013] Optionally, the operating mechanism also includes a tension spring with one end connected to the moving contact and the other end connected to the housing. The tension spring is used to provide elastic force to the moving contact so that the moving contact tends to open from the stationary contact.

[0014] Optionally, the operating mechanism also includes a magnetic trip unit located inside the housing; when a short circuit fault occurs in the circuit breaker, the magnetic trip unit is used to drive the latch to rotate so that the latch is unlocked from the handle, and the moving contact is disconnected from the stationary contact under the action of the tension spring.

[0015] Optionally, the operating mechanism also includes a thermal trip unit and an overload linkage. One end of the overload linkage is attached to the thermal trip unit, and the other end is connected to the end of the latch away from the handle. When an overload fault occurs in the circuit breaker, the thermal trip unit expands due to heat, which can drive the latch to unlock from the handle, and the moving contact is disconnected from the stationary contact under the action of the tension spring.

[0016] Optionally, the operating mechanism also includes a micro switch, which is used to cut off the electrical signal of the closing electromagnet when the moving contact and the stationary contact are in the closed state, so as to reset the moving iron core of the closing electromagnet; and to cut off the electrical signal of the opening electromagnet when the moving contact and the stationary contact are in the open state, so as to reset the push rod of the opening electromagnet.

[0017] Optionally, the operating mechanism also includes a linkage with one end connected to the handle and the other end connected to the moving contact.

[0018] In another aspect, the present invention provides a circuit breaker that includes the operating mechanism described above.

[0019] The beneficial effects of this invention include:

[0020] The operating mechanism provided in this application includes a housing and a handle, a stationary contact, a moving contact, and an electromagnet mechanism located within the housing. The electromagnet mechanism and the moving contact are respectively connected to the handle for transmission. The electromagnet mechanism drives the handle to move, and the handle can drive the moving contact to close or open the circuit breaker with the stationary contact. Thus, when opening or closing the circuit breaker using this operating mechanism, the electromagnet mechanism can be used for driving. Compared to the existing technology that uses a motor drive, this application does not require the use of multiple meshing gears. Therefore, on the one hand, this application can minimize the efficiency reduction problem between multi-stage transmissions, thereby improving the opening and closing speed of the operating mechanism; on the other hand, compared to the prior art, this application has fewer parts, thus improving the operational reliability of the operating mechanism and extending its service life. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is one of the structural schematic diagrams of the operating mechanism provided in an embodiment of the present invention;

[0023] Figure 2 This is a second schematic diagram of the structure of the operating mechanism provided in an embodiment of the present invention;

[0024] Figure 3 This is the third schematic diagram of the structure of the operating mechanism provided in the embodiment of the present invention;

[0025] Figure 4 The fourth schematic diagram of the operating mechanism provided in the embodiment of the present invention;

[0026] Figure 5 Fifth schematic diagram of the structure of the operating mechanism provided in the embodiment of the present invention;

[0027] Figure 6 This is the sixth schematic diagram of the structure of the operating mechanism provided in the embodiment of the present invention;

[0028] Figure 7 The seventh schematic diagram of the operating mechanism provided in the embodiment of the present invention;

[0029] Figure 8 This is the eighth schematic diagram of the operating mechanism provided in the embodiment of the present invention.

[0030] Icons: 10-Housing; 20-Handle; 21-Hook; 30-Stationary contact; 40-Moving contact; 41-Tension spring; 51-Opening electromagnet; 52-Closing electromagnet; 60-Lock; 61-First body; 62-Hanging part; 63-Lock spring; 70-Trigger lever; 71-Reset spring; 80-Magnetic trip unit; 90-Thermal trip unit; 91-Overload linkage; 92-Micro switch; 93-Linkage. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. 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. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Please refer to Figures 1 to 4 This embodiment provides an operating mechanism, which includes a housing 10 and a handle 20, a stationary contact 30, a moving contact 40, and an electromagnet mechanism located within the housing 10. The electromagnet mechanism and the moving contact 40 are respectively throttle-connected to the handle 20. The electromagnet mechanism drives the handle 20 to move, and the handle 20 can drive the moving contact 40 to move to close or open the circuit breaker with the stationary contact 30. This operating mechanism can improve the opening and closing speed of the circuit breaker.

[0038] The handle 20, stationary contact 30, moving contact 40 and electromagnet mechanism are all housed within the housing 10. The housing 10 protects the various components of the operating mechanism, preventing them from being exposed and causing safety accidents or compromising the reliability of the operating mechanism.

[0039] The electromagnet mechanism is driven by the handle 20, and the handle 20 is driven by the moving contact 40. When the electromagnet mechanism receives an electrical signal, it can directly or indirectly act on the handle 20, causing the handle 20 to move relative to the circuit breaker, thereby causing the moving contact 40 and the stationary contact 30 to open or close. It should be noted that the opening or closing action can occur after the electromagnet mechanism acts on the handle 20, causing relative movement of the handle 20. In one possible implementation, the moving contact 40 drives the handle 20 to move, thereby causing the moving contact 40 and the stationary contact 30 to open or close, correspondingly, the handle 20 is in the open or closed position. In another possible implementation, the handle 20 can also drive the moving contact 40 to move, thereby causing the moving contact 40 and the stationary contact 30 to open or close, correspondingly, the handle 20 is in the open or closed position.

[0040] Additionally, it should be noted that the moving contact 40 can be directly connected to the handle 20, or it can be indirectly connected to the handle 20 through other components (such as the moving contact 40 bracket). This application does not impose any restrictions on this, and those skilled in the art can choose according to their needs.

[0041] In summary, the operating mechanism provided in this application includes a housing 10 and a handle 20, a stationary contact 30, a moving contact 40, and an electromagnet mechanism, all located within the housing 10. The electromagnet mechanism and the moving contact 40 are respectively connected to the handle 20 for transmission. The electromagnet mechanism drives the handle 20 to move, and the handle 20 can drive the moving contact 40 to move to close or open the circuit breaker with the stationary contact 30. Thus, when opening or closing the circuit breaker using this operating mechanism, the electromagnet mechanism can be used for driving. Compared to the prior art that uses a motor drive, this application does not require the use of multiple meshing gears. Therefore, on the one hand, this application can minimize the efficiency reduction problem between multi-stage transmissions, thereby improving the opening and closing speed of the operating mechanism; on the other hand, compared to the prior art, this application reduces the number of parts, thus improving the operational reliability of the operating mechanism and extending its service life.

[0042] In this embodiment, the electromagnet mechanism includes a tripping electromagnet 51 and a closing electromagnet 52. The closing electromagnet 52 is used to drive the handle 20 to move to close the circuit; the tripping electromagnet 51 drives the handle 20 to move to open the circuit.

[0043] In other words, the opening and closing of the circuit breaker in this application are driven by different electromagnets. When closing is required, the closing electromagnet 52 drives the handle 20 to move, so that the handle 20 drives the moving contact 40 to move and thus close the circuit breaker; when opening is required, the opening electromagnet 51 drives the handle 20 to move relative to each other, so that the moving contact 40 and the stationary contact 30 open the circuit breaker.

[0044] Please refer to Figure 1 and Figure 2 In this embodiment, the operating mechanism further includes a latch 60 rotatably connected to the housing 10, the latch 60 being located between the handle 20 and the moving contact 40; the latch 60 is used to lock the handle 20 when closing and to unlock the handle 20 when opening.

[0045] It should be noted that the latch 60 is used to lock or unlock the handle 20. For example, when the circuit is tripped, the latch 60 and the handle 20 are in the unlocked state, such as... Figure 1 As shown; when the circuit is closed, the latch 60 and handle 20 are in the locked state, as shown. Figure 2 As shown, at this time, the latch 60 can lock the handle 20 in the closed position, so that the circuit breaker remains in the closed state.

[0046] The operating mechanism provided in this application, when electric closing is required, drives the handle 20 to move using the closing electromagnet 52, which in turn moves the moving contact 40 mechanism, thereby closing the moving contact 40 and the stationary contact 30. At this time, the handle 20 is in the closed position and is locked by the latch 60, keeping the moving contact 40 and the stationary contact 30 in the closed state. When electric opening is required, the opening electromagnet 51 drives the latch 60 to move, thereby unlocking the latch 60 and the handle 20, allowing the moving contact 40 to open with the stationary contact 30.

[0047] For example, the above-mentioned latch 60 includes a first body 61 and a hook 62 provided on the first body 61. The hook 62 is located on the side of the first body 61 near the handle 20. The handle 20 is provided with a hook 21 that cooperates with the hook 62. When the circuit is closed, the hook 21 is hooked on the hook 62 to lock the handle 20 and the moving contact 40.

[0048] Among them, such as Figure 1 As shown, the hook part 62 can be a groove provided on the first body 61 and adapted to the hook 21. In this way, when the switch is closed, it is convenient for the hook part 62 and the hook 21 to cooperate, and then the handle 20 can be locked by the latch 60.

[0049] To facilitate the cooperation between the hook 21 and the hanging part 62, in this embodiment, as follows: Figure 1 As shown, the side of hook 21 near the latch 60 and the side of the first body 61 of latch 60 near hook 21 are both provided with corresponding guide slopes, which facilitates the hook 21 and latch 60 to be attached.

[0050] Please continue to refer to Figure 1 Optionally, the operating mechanism also includes a locking spring 63, one end of which is connected to the latch 60 and the other end of which is connected to the housing 10; the locking spring 63 is used to provide elastic force to the latch 60 so that the latch 60 tends to lock with the handle 20.

[0051] Corresponding to this application Figure 1 In the middle, the locking spring 63 has the tendency to drive the locking latch 60 to rotate clockwise.

[0052] Furthermore, in this embodiment, one end of the locking spring 63 is connected to the latch 60, and the other end is connected to the housing 10. For example, a protrusion can be provided on the housing 10, connecting one end of the locking spring 63 to the latch 60 and the other end to the protrusion. Of course, this is only one possible connection method for the locking spring 63 provided in this application, and is not the only limitation on the connection method of the locking spring 63. Those skilled in the art can determine the specific connection method according to the actual situation.

[0053] Optionally, the operating mechanism also includes a trip lever 70 rotatably connected to the housing 10, with one end of the trip lever 70 abutting against the latch 60 and the other end abutting against the trip electromagnet 51; the trip electromagnet 51 drives the trip lever 70 to rotate, and the trip lever 70 can drive the latch 60 to rotate so that the latch 60 and the handle 20 are unlocked.

[0054] This application, by providing a tripping lever 70, facilitates the tripping electromagnet 51 to drive the latch 60 to move via the tripping lever 70. The shape of the tripping lever 70 is not limited in this application.

[0055] After the trip lever 70 drives the latch 60 and handle 20 to unlock under the drive of the trip electromagnet 51, in order to facilitate the reset of the trip lever 70, the operating mechanism may optionally include a reset spring 71. The reset spring 71 is used to provide elastic force to the trip lever 70 so that the end of the trip lever 70 near the trip electromagnet 51 tends to move toward the trip electromagnet 51.

[0056] In other words, when tripping is required, the push rod of the tripping electromagnet 51 pops out, driving the trip lever 70 to rotate. This causes the end of the trip lever 70 away from the tripping electromagnet 51 to act on the latch 60, thereby unlocking the latch 60 and the handle 20. Figure 4 As shown; after the handle 20 and the latch 60 are unlocked, the release lever 70 is reset by the return spring 71, thereby releasing the force acting on the latch 60. At this time, the latch 60 also resets, as shown. Figure 1 As shown.

[0057] Optionally, the operating mechanism also includes a tension spring 41 with one end connected to the moving contact 40 and the other end connected to the housing 10. The tension spring 41 is used to provide elastic force to the moving contact 40 so that the moving contact 40 tends to open with the stationary contact 30.

[0058] Thus, when the tripping electromagnet 51 needs to drive the moving contact 40 and the stationary contact 30 to trip, the push rod of the tripping electromagnet 51 pops out and acts on the trip lever 70. The trip lever 70 rotates clockwise to drive the latch 60 to rotate counterclockwise, thereby unlocking the handle 20 and the latch 60. At this time, the moving contact 40 rotates counterclockwise under the release of energy from the tension spring 41, thus separating the moving contact 40 and the stationary contact 30 to trip the circuit breaker. Correspondingly, the handle 20 also moves to the left and resets under the action of the moving contact 40. It should be noted here that the left, right, clockwise, and counterclockwise directions mentioned here are all in reference to the direction of rotation. Figures 5 to 8 The directions shown are provided as examples for illustrative purposes and are not intended to be the sole limitation on their movement patterns and placement.

[0059] To achieve short-circuit protection for the circuit breaker, please refer to the following in this embodiment: Figure 1 and Figure 4The operating mechanism also includes a magnetic trip unit 80 located inside the housing 10; when a short circuit fault occurs in the circuit breaker, the magnetic trip unit 80 is used to drive the latch 60 to rotate so that the latch 60 is unlocked from the handle 20, and the moving contact 40 is disconnected from the stationary contact 30 under the action of the tension spring 41.

[0060] For example, please refer to Figure 1 The magnetic trip unit 80 can be located below the latch 60. When it is necessary to open the circuit breaker, the moving contact of the magnetic trip unit 80 extends, thereby driving the latch 60 to rotate counterclockwise. In this way, the latch 60 will unlock from the handle 20. At this time, the moving contact 40 is in the unlocked state. The moving contact 40 rotates counterclockwise under the action of the tension spring 41, thereby separating the moving contact 40 from the stationary contact 30 to open the circuit breaker. The handle 20 moves to the open position under the drive of the moving contact 40.

[0061] Alternatively, please refer to Figure 2 and Figure 3 The operating mechanism also includes a thermal trip unit 90 and an overload linkage 91. One end of the overload linkage 91 is attached to the thermal trip unit 90, and the other end is connected to the end of the latch 60 away from the handle 20. When the circuit breaker experiences an overload fault, the thermal trip unit 90 expands due to heat, which can drive the latch 60 to unlock from the handle 20. The moving contact 40 is disconnected from the stationary contact 30 under the action of the tension spring 41.

[0062] Thus, when an overload fault occurs in the circuit breaker, the thermal trip unit 90 expands due to heat, which drives the overload linkage 91 to move. This causes the overload linkage 91 to rotate the latch 60 counterclockwise, thereby unlocking the latch 60 and the handle 20. At this time, the moving contact 40 separates from the stationary contact 30 under the action of the tension spring 41 to open the circuit, and the handle 20 moves to the open position under the action of the moving contact 40.

[0063] Since the closing electromagnet 52 drives the handle 20 to move, which in turn causes the moving contact 40 to move and close with the stationary contact 30, in order to facilitate the timely reset of the closing electromagnet 52 after driving the circuit breaker to close, and thus avoid the closing electromagnet 52 affecting the subsequent opening of the circuit breaker, in this embodiment, the operating mechanism also includes a micro switch 92. When the moving contact 40 and the stationary contact 30 are in the closed state, the micro switch 92 is used to cut off the electrical signal of the closing electromagnet 52 to reset the moving iron core of the closing electromagnet 52; when the moving contact 40 and the stationary contact 30 are in the open state, the micro switch 92 is used to cut off the electrical signal of the opening electromagnet 51 to reset the push rod of the opening electromagnet 51.

[0064] For example, such as Figure 2 and Figure 3As shown, the micro switch 92 can be set at the engagement point of the handle 20 and the latch 60. In this way, when the circuit is closed, the handle 20 and the latch 60 are locked, and the handle 20 will trigger the micro switch 92, which will then send a control signal to the closing electromagnet 52 to de-energize the closing electromagnet 52 and drive it to reset. When the circuit is opened, the handle 20 and the latch 60 are unlocked, and the handle 20 will cancel the triggering of the micro switch 92, which will then send a control signal to the opening electromagnet 51 to de-energize the opening electromagnet 51 and reset its push rod.

[0065] In this embodiment, the operating mechanism further includes a connecting rod 93, one end of which is connected to the handle 20 and the other end of which is connected to the moving contact 40. Exemplarily, the connecting rod 93 can be U-shaped, so that both ends of the connecting rod 93 can be hinged to the handle 20 and the moving contact 40 respectively, thereby facilitating mutual driving between the moving contact 40 and the handle 20.

[0066] To facilitate understanding of the working process of the operating mechanism provided in this application, the working principle of the operating mechanism will be explained and described first, as follows:

[0067] Initial state: such as Figure 5 As shown, the operating mechanism is in the open state, the moving contact 40 and the stationary contact 30 are separated, and the handle 20 and the latch 60 are in the unlocked state.

[0068] Manual closing: Pushing handle 20 to the right, handle 20 drives moving contact 40 to rotate clockwise via connecting rod 93. Moving contact 40 and stationary contact 30 come into contact and close the circuit. Tension spring 41 is stretched and stores energy. Figure 7 As shown; at the same time, the hook 21 of the handle 20 is guided by the guide slope on the first body 61 and engages with the latch 60, and is then locked by the latch 60. At this time, the operating mechanism remains in the closed state.

[0069] Manual tripping: Pull handle 20 to the left, hook 21 disengages from engagement part 62, and handle 20 and latch 60 unlock. At this time, moving contact 40 rotates counterclockwise under the release of energy from tension spring 41, separating moving contact 40 from stationary contact 30 to trip the circuit breaker. Figure 5 As shown. Simultaneously, the moving contact 40, via the connecting rod 93, drives the handle 20 to continue moving to the left, and the handle 20 resets (i.e., the handle 20 moves to the open position, as shown). Figure 5 ).

[0070] Electric closing: The closing electromagnet 52 drives the handle 20 to move to the right, such as... Figure 6As shown, at this time, the handle 20 drives the moving contact 40 to rotate clockwise via the connecting rod 93, closing the circuit between the moving contact 40 and the stationary contact 30, and the tension spring 41 is stretched and stores energy. Simultaneously, the hook 21, guided by the guide slope of the first body 61, engages with the hook portion 62 of the latch 60, thereby locking the handle 20 and the latch 60, thus keeping the operating mechanism in the closed state. When the operating mechanism remains in the closed state, the handle 20 and the latch 60 are locked, and the handle 20 triggers the micro switch 92, which controls the closing electromagnet 52 to reset.

[0071] Electric tripping: When the tripping solenoid 51 receives a tripping signal, its push rod pops out, thereby driving the tripping lever 70 to rotate clockwise. The return spring 71 is then stressed and energy is stored. Figure 8 As shown; the end of the trip lever 70 away from the trip electromagnet 51 acts on the latch 60, thereby driving the latch 60 to rotate counterclockwise. At this time, the latch 60 and the handle 20 are unlocked; the moving contact 40 rotates counterclockwise under the release of energy from the tension spring 41, so that the moving contact 40 and the stationary contact 30 are separated and the circuit is opened. At the same time, the moving contact 40 drives the handle 20 to move to the left through the connecting rod 93 to move to the open position. When the handle 20 moves to the open position, the micro switch 92 controls the trip electromagnet 51 to be de-energized, the push rod of the trip electromagnet 51 retracts, the trip lever 70 is reset under the action of the return spring 71, and the latch 60 is also reset under the action of the latch spring 63, as shown. Figure 5 As shown.

[0072] Short-circuit fault tripping: When a short-circuit fault occurs in the circuit breaker, the magnetic trip unit 80, under the action of the coil magnetic field, overcomes the reaction force of the moving and stationary iron core return springs, causing the moving and stationary iron cores to engage. The moving iron core of the magnetic trip unit 80 drives the push rod to move, and the push rod of the magnetic trip unit 80 pops out, thereby driving the latch 60 to rotate counterclockwise, unlocking the latch 60 and the handle 20. The moving contact 40 rotates counterclockwise under the release of energy from the tension spring 41 to disconnect from the stationary contact 30. At the same time, the moving contact 40 drives the handle 20 to move to the open position to the left via the connecting rod 93.

[0073] Overload fault tripping: When an overload fault occurs in the circuit breaker, the thermal trip unit 90 bends clockwise due to heat, which in turn drives the latch 60 to rotate counterclockwise via the overload linkage 91, unlocking the latch 60 from the handle 20; the moving contact 40 rotates counterclockwise under the release of energy from the tension spring 41 to disconnect from the stationary contact 30. At the same time, the moving contact 40 drives the handle 20 to move to the open position to the left via the linkage 93.

[0074] In another aspect, the present invention provides a circuit breaker including the aforementioned operating mechanism. Since the structure and beneficial effects of this operating mechanism have been described in detail above, they will not be repeated here.

[0075] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0076] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. An operating mechanism, characterized in that, The device includes a housing (10) and a handle (20), a stationary contact (30), a moving contact (40), and an electromagnet mechanism located within the housing (10). The electromagnet mechanism and the moving contact (40) are respectively connected to the handle (20) in a transmission manner. The electromagnet mechanism includes a tripping electromagnet (51) and a closing electromagnet (52). The closing electromagnet (52) drives the handle (20) to move to close the circuit. The tripping electromagnet (51) drives the handle (20) to move to open the circuit. The operating mechanism also includes a latch (60) rotatably connected within the housing (10). The latch (60) is located between the handle (20) and the moving contact (40). The latch (60) is used to lock the handle (20) when closing the circuit and to unlock the handle (20) when opening the circuit. The latch (60) includes a first body (61) and a hook (62) provided on the first body (61). The hook (62) is located on the side of the first body (61) close to the handle (20). The handle (20) is provided with a hook (21) that cooperates with the hook (62). When closing the circuit, the hook (21) is hooked on the hook (62) to lock the handle (20) and the moving contact (40). The handle (20) is driven to move, and the handle (20) can drive the moving contact (40) to move to close or open the circuit with the stationary contact (30).

2. The operating mechanism according to claim 1, characterized in that, The operating mechanism also includes a latch spring (63) with one end connected to the latch (60) and the other end connected to the housing (10); the latch spring (63) is used to provide elastic force to the latch (60) so that the latch (60) tends to lock with the handle (20).

3. The operating mechanism according to claim 1, characterized in that, The operating mechanism also includes a tripping rod (70) rotatably connected to the housing (10), one end of the tripping rod (70) abutting against the latch (60) and the other end abutting against the tripping electromagnet (51); The trip electromagnet (51) drives the trip lever (70) to rotate, and the trip lever (70) can drive the latch (60) to rotate so that the latch (60) and the handle (20) are unlocked.

4. The operating mechanism according to claim 3, characterized in that, The operating mechanism also includes a reset spring (71) for providing elastic force to the trip lever (70) so that the end of the trip lever (70) near the trip electromagnet (51) tends to move toward the trip electromagnet (51).

5. The operating mechanism according to any one of claims 1 to 4, characterized in that, The operating mechanism also includes a tension spring (41) with one end connected to the moving contact (40) and the other end connected to the housing (10). The tension spring (41) is used to provide elastic force to the moving contact (40) so that the moving contact (40) tends to open with the stationary contact (30).

6. The operating mechanism according to claim 5, characterized in that, The operating mechanism also includes a magnetic trip unit (80) disposed in the housing (10); when a short circuit fault occurs in the circuit breaker, the magnetic trip unit (80) is used to drive the latch (60) to rotate so that the latch (60) is unlocked from the handle (20), and the moving contact (40) is disconnected from the stationary contact (30) under the action of the tension spring (41).

7. The operating mechanism according to claim 5, characterized in that, The operating mechanism also includes a thermal trip unit (90) and an overload linkage (91). One end of the overload linkage (91) is attached to the thermal trip unit (90), and the other end is connected to the end of the latch (60) away from the handle (20). When the circuit breaker experiences an overload fault, the thermal trip unit (90) expands due to heat, which can drive the latch (60) to unlock from the handle (20). The moving contact (40) is disconnected from the stationary contact (30) under the action of the tension spring (41).

8. The operating mechanism according to claim 1, characterized in that, The operating mechanism also includes a micro switch (92). When the moving contact (40) and the stationary contact (30) are in the closed state, the micro switch (92) is used to cut off the electrical signal of the closing electromagnet (52) to reset the moving iron core of the closing electromagnet (52). When the moving contact (40) and the stationary contact (30) are in the open state, the micro switch (92) is used to cut off the electrical signal of the opening electromagnet (51) to reset the push rod of the opening electromagnet (51).

9. The operating mechanism according to any one of claims 1 to 4, characterized in that, The operating mechanism also includes a connecting rod (93) with one end connected to the handle (20) and the other end connected to the moving contact (40).

10. A circuit breaker, characterized in that, Includes the operating mechanism described in any one of claims 1 to 9.

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