circuit breaker

Abstract

A circuit breaker comprises an operating mechanism, a contact system and a connector arranged in a circuit breaker housing, the contact system is connected with a conductive member through the connector, the connector is provided with a clamping end for clamping the conductive member, and the circuit breaker further comprises a driving mechanism which is in transmission with the operating mechanism or the contact system, when the circuit breaker is opened, the operating mechanism or the contact system drives the connector to be unlocked through the driving mechanism, and the clamping of the conductive member is released, when the circuit breaker is closed, the operating mechanism or the contact system drives the connector to be locked through the driving mechanism, and the conductive member is clamped, and when the circuit breaker is opened and closed, the operating mechanism or the contact system also drives the connector to unlock or lock the conductive member, so that the circuit breaker can be separated from the external conductive member after being opened.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and in particular to a circuit breaker. Background Technology

[0002] Circuit breakers are important electrical components in the low-voltage electrical field. They can connect and disconnect external lines, and automatically cut off the circuit when overcurrent or short circuit occurs in the external lines, thus protecting them. Existing plug-in circuit breakers connect their contact assemblies to the external lines via connectors within the circuit breaker.

[0003] Because connectors have significant clamping force, existing plug-in circuit breakers require considerable effort to insert or remove from their mounting positions, leading to wear on the connectors and external conductive components. Therefore, existing plug-in circuit breakers incorporate a drive mechanism to open the connector during tripping, reducing the clamping force on the external conductive components. However, this existing drive mechanism is independent of the circuit breaker's operating mechanism. The circuit breaker's tripping and closing operations are independent of the connector's unlocking and locking operations, making them inconvenient. Furthermore, if the connector is disconnected from the external line before the circuit breaker trips, or if it locks to the conductive components only after the circuit breaker closes, arcing or temperature rise can easily occur within the connector, affecting the circuit breaker's normal performance. Summary of the Invention

[0004] This invention provides a circuit breaker in which the movement of the connector and the operating mechanism are linked, and the shut-off of the connector and the operating mechanism can be achieved in a single operation.

[0005] The present invention also provides another circuit breaker that can lock the shut-off sequence of the operating mechanism and the connector, so that the connector is unlocked after the circuit breaker is opened, or the circuit breaker is closed only after the connector is locked to the conductive part.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A circuit breaker includes an operating mechanism, a contact system, and a connector disposed within a circuit breaker housing. The contact system is connected to a conductive element via the connector. The connector has a clamping end for clamping the conductive element. The circuit breaker also includes a drive mechanism that drives the operating mechanism or the contact system. When the circuit breaker is open, the operating mechanism or the contact system drives the connector to unlock via the drive mechanism, releasing the clamping of the conductive element. When the circuit breaker is closed, the operating mechanism or the contact system drives the connector to lock via the drive mechanism, clamping the conductive element.

[0008] Preferably, the transmission path between the operating mechanism or contact system and the connector is provided with a delayed idle stroke. The delayed idle stroke includes a first idle stroke. When the circuit breaker transitions from the closed to the open state, the operating mechanism moves in the opening direction, driving the contact system to open. After passing through the first idle stroke, the operating mechanism or contact system drives the connector to unlock, so that the contact system opens first and the connector unlocks later. When the circuit breaker transitions from the open to the closed state, the operating mechanism rotates in the closing direction. The operating mechanism or contact system first drives the connector to lock. The operating mechanism continues to move, driving the contact system to close, and simultaneously passes through the first idle stroke.

[0009] Preferably, the delayed idle travel further includes a second idle travel. When the circuit breaker transitions from a closed to an open state, the operating mechanism rotates in the opening direction, driving the contact system to open. After the second idle travel and the first idle travel, the operating mechanism or the contact system drives the connector to unlock, so that the contact system opens first and the connector unlocks later. When the circuit breaker transitions from an open to a closed state, the operating mechanism rotates in the closing direction. After the second idle travel, the operating mechanism or the contact system drives the connector to lock. The operating mechanism continues to rotate, causing the contact system to close, and simultaneously passes through the first idle travel.

[0010] Preferably, the first free travel is formed between the first transmission structure and the second transmission structure in a transmission engagement. When the circuit breaker switches from the closed to the open state, the first transmission structure is driven to travel through the first free travel and then contact the second transmission structure, driving the second transmission structure to move or rotate and unlock the connector. When the circuit breaker switches from the open to the closed state, the first transmission structure is driven to move or rotate the second transmission structure and lock the connector. The operating mechanism continues to move, and when the contact system closes, the first transmission structure is driven to separate from the second transmission structure and travel through the first free travel.

[0011] Preferably, an elastic element is provided on the transmission path between the operating mechanism or contact system and the connector, and the first idle stroke includes the deformation of the elastic element.

[0012] Preferably, the time delay travel is located at the transmission point between the drive mechanism and the operating mechanism or the contact system, or at the transmission point between the drive mechanism and the connector, or between the transmission elements of the drive mechanism, or between the transmission elements inside the connector.

[0013] Preferably, the connector includes two sets of conductive structures arranged opposite to each other; the outer sides of the two sets of conductive structures are respectively provided with elastic clamping mechanisms for driving the two sets of conductive structures to move closer to each other; a camshaft and operating shafts respectively provided at both ends of the camshaft axis are provided between the two sets of conductive structures; the camshaft includes a long diameter portion and a short diameter portion; the two ends of the long diameter portion can respectively push open the two sets of conductive structures; the short diameter portion is used to avoid the two sets of conductive structures; when the camshaft rotates, when the long diameter portion corresponds to the two sets of conductive structures, it pushes open the two sets of conductive structures to unlock the connector; when the short diameter portion corresponds to the two sets of conductive structures, the elastic clamping mechanism drives the two sets of conductive structures to move closer to lock the connector.

[0014] Preferably, after the long diameter portion separates from the two sets of conductive structures, the camshaft can continue to rotate, driving the long diameter portion away from the conductive structures to form the first free stroke. After the operating mechanism or contact system drives the camshaft to rotate through the drive mechanism to lock the connector, the operating mechanism continues to rotate to drive the circuit breaker to close, while the drive mechanism drives the camshaft to continue to rotate through the first free stroke.

[0015] Preferably, the second idle stroke is a sliding idle stroke or a rotating idle stroke.

[0016] Preferably, the second idle stroke includes a hole-like structure and a blocking structure. The blocking structure slides or rotates within the hole-like structure. The hole-like structure includes at least two sidewalls that cooperate with the blocking structure. There is a gap between the blocking structure and the at least two sidewalls. After the blocking structure moves through the gap, it drives to cooperate with the at least two sidewalls.

[0017] Preferably, the driving mechanism includes a transmission mechanism and a rotating mechanism. One end of the rotating mechanism is connected to the connector, and the rotating mechanism can drive the connector to unlock or lock when it rotates. The transmission mechanism includes a transmission rod, one end of which is rotatably connected to the operating mechanism or contact system, and the other end of which is driven by the rotating mechanism.

[0018] Preferably, a first clearance hole is provided at the connection between the transmission rod and the rotating mechanism, and the rotating mechanism is provided with a second rotating shaft inserted into the first clearance hole. The size of the first clearance hole is larger than that of the second rotating shaft, and the first clearance hole can move in the operating hole to avoid the radius difference generated when the rotating mechanism rotates.

[0019] Preferably, the driving mechanism further includes a linkage mechanism, which is disposed between the transmission rod and the rotating mechanism, and the transmission rod drives the rotating mechanism to rotate through the linkage mechanism.

[0020] Preferably, the linkage mechanism includes an operating part with an operating hole, and the rotating mechanism has a second rotating shaft passing through the operating hole. The size of the operating hole is larger than that of the second rotating shaft, and the second rotating shaft can move within the operating hole to avoid the radius difference generated when the rotating mechanism rotates.

[0021] Preferably, a rotating shaft structure and a free stroke hole are provided between the linkage mechanism and the transmission mechanism to form the second free stroke. The size of the free stroke hole is larger than the diameter of the rotating shaft structure, and the transmission mechanism drives the linkage mechanism to move through the rotating shaft structure.

[0022] Preferably, the second idle stroke is a rotational idle stroke. The rotating mechanism includes a pivot hole for driving the connector. The connector is provided with an operating shaft that mates with the pivot hole. The wall of the pivot hole is provided with a first mating point and a second mating point that mates with the operating shaft. The distance between the first mating point and the second mating point is greater than the size of the operating shaft to form a rotational idle stroke. After the rotating mechanism rotates through the rotational idle stroke, it drives the operating shaft to rotate.

[0023] Preferably, the driving mechanism includes a transmission mechanism, a linkage mechanism, and a rotating mechanism. One end of the rotating mechanism is connected to the connector, and the rotating mechanism can drive the connector to unlock or lock when it rotates. The transmission mechanism includes a transmission rod, one end of which is rotatably connected to the operating mechanism or contact system, and the other end of which is connected to the rotating mechanism via the linkage mechanism.

[0024] Preferably, the contact system includes a moving contact, a stationary contact, and a contact support. The contact support is rotatably mounted inside the circuit breaker housing, the moving contact is mounted on the contact support, the contact support is connected to the operating mechanism, and the contact support is connected to the driving mechanism.

[0025] Preferably, the operating mechanism includes a mechanism support, a rocker arm assembly, a jump fastener, a locking fastener, a re-fastener, a first link, a second link, and a main tension spring. The rocker arm assembly, jump fastener, locking fastener, and re-fastener are rotatably mounted on the mechanism support. The multi-link mechanism includes the rocker arm assembly, jump fastener, locking fastener, re-fastener, first link, and second link. The jump fastener and locking fastener are locked together, and the locking fastener and re-fastener are limited together. The first link is rotatably connected to the jump fastener. One end of the second link is rotatably connected to the first link, and the other end is connected to the moving contact. One end of the main tension spring is connected to the rocker arm assembly, and the other end is connected to the first link. The driving mechanism is connected to the rocker arm assembly, the first link, or the second link.

[0026] The circuit breaker created by this invention, when the operating mechanism or contact system drives the circuit breaker to open or close, also drives the connector to unlock or lock the conductive parts, so as to facilitate the separation of the circuit breaker from the external conductive parts after opening.

[0027] In addition, the operating mechanism or contact system first drives the circuit breaker to open, and then the driving mechanism drives the connector to unlock, releasing the clamping of the conductive parts to prevent electric arcs from occurring in the connector during opening; the operating mechanism or contact system first drives the connector to lock, clamping the conductive parts, and then drives the circuit breaker to close, so as to ensure good conductivity between the contact system and the external line during the closing process, in order to avoid the electric repulsion force of the large current flowing through. Attached Figure Description

[0028] Figure 1 This is a partial internal structure schematic diagram of an embodiment of the circuit breaker created by the present invention;

[0029] Figure 2 yes Figure 1 Exploded view;

[0030] Figure 3 This is a schematic diagram of the drive mechanism and connector in the circuit breaker tripped and connector unlocked state;

[0031] Figure 4 This is a schematic diagram of the drive mechanism and connector in the closed and locked state of the circuit breaker;

[0032] Figure 5 This is a schematic diagram of the linkage mechanism;

[0033] Figure 6 This is a schematic diagram of the connector structure;

[0034] Figure 7 This is an exploded view of the connector;

[0035] Figure 8 This is a schematic diagram of the connector's camshaft structure;

[0036] Figure 9 It is a type of mating between the pivot hole on the rotating mechanism and the operating shaft on the connector;

[0037] Figure 10 It is another way of fitting the pivot hole on the rotating mechanism with the operating shaft on the connector. Detailed Implementation

[0038] The following is in conjunction with the appendix Figures 1 to 10 The given embodiments further illustrate specific implementations of the drive mechanism created by the present invention. The drive mechanism created by the present invention is not limited to the descriptions of the following embodiments.

[0039] like Figure 1-2As shown, the circuit breaker created by this invention includes an operating mechanism, a contact system, and a connector 4 disposed within the circuit breaker housing. The contact system is connected to a conductive element via the connector 4. The connector 4 is provided with a clamping end for clamping the conductive element. The drive mechanism is driven by the operating mechanism or the contact system. When the circuit breaker is open, the operating mechanism or the contact system drives the connector 4 to unlock via the drive mechanism, releasing the clamping of the conductive element. When the circuit breaker is closed, the operating mechanism or the contact system drives the connector 4 to lock via the drive mechanism, clamping the conductive element.

[0040] The circuit breaker created by this invention, when the operating mechanism drives the circuit breaker to open or close, also drives the connector 4 to unlock or lock the conductive parts, so as to facilitate the separation of the circuit breaker from the conductive parts. When closing, the circuit breaker and the conductive parts are clamped together, making the operation simple.

[0041] like Figure 1 As shown, the circuit breaker in this embodiment is a plug-in type circuit breaker, including an operating mechanism, a contact system, and a connector 4 disposed within the circuit breaker housing. The contact system includes a moving contact, a stationary contact, and a contact support 113. The contact support 113 is rotatably mounted within the circuit breaker housing, and the moving contact is mounted on the contact support 113. The contact support 113 is connected to the operating mechanism, and the operating mechanism drives the moving contact to swing and cooperate with the stationary contact through the contact support 113 to realize the opening and closing of the circuit breaker. The contact system is connected to an external conductive component through the connector 4. The connector 4 is provided with a clamping end for clamping the external conductive component. In the figure, the external conductive component clamped by the connector 4 is the external conductive component 47.

[0042] The circuit breaker includes a drive mechanism connected to connector 4. When the circuit breaker is opened or closed, the operating mechanism or contact system drives connector 4 to unlock or lock through the drive mechanism. When the operating mechanism drives the circuit breaker to open, the drive contact support 113 rotates to its open position, and the moving contact rotates to separate from the stationary contact. The operating mechanism or contact support 113 or the moving contact also drives connector 4 to unlock through the drive mechanism, releasing the clamping of the external conductive component. When the operating mechanism drives the circuit breaker to close, the drive contact support 113 rotates to its closed position, and the moving contact rotates to contact and cooperate with the stationary contact. The operating mechanism or contact support 113 or the moving contact also drives connector 4 to lock through the drive mechanism, clamping the external conductive component.

[0043] Preferably, the driving mechanism in this embodiment includes a transmission mechanism 1 and a rotating mechanism 3. One end of the rotating mechanism 3 is connected to the connector 4. When the rotating mechanism 3 rotates, it can drive the unlocking or locking mechanism, causing the connector 4 to rotate in the unlocking direction or the locking direction. The transmission mechanism 1 is connected to the operating mechanism or the contact system. The operating mechanism or the contact system drives the rotating mechanism 3 to rotate through the transmission mechanism 1, thereby locking or unlocking the connector 4. The transmission mechanism 1 includes a transmission rod 110, which is disposed between the operating mechanism and the connector 4, or between the contact system and the connector 4. One end of the transmission rod 110 is rotatably connected to the operating mechanism or the contact system, and the other end of the transmission rod 110 is driven to the connector 4 through the rotating mechanism 3.

[0044] Preferably, the driving mechanism further includes a linkage mechanism 2, which synchronously drives multiple connectors 4 to unlock or lock. Multiple rotating mechanisms 3 are rotatably mounted on multiple connectors 4 and connected to the linkage mechanism 2 respectively. The transmission mechanism 1 drives the multiple rotating mechanisms 3 to rotate via the linkage mechanism 2. The linkage mechanism 2 is disposed between the transmission rod 110 and the rotating mechanisms 3, and has a transmission part that cooperates with the transmission rod 110. The transmission rod 110 drives the rotating mechanisms 3 to rotate via the linkage mechanism 2. Preferably, the transmission part is disposed at both ends of the linkage mechanism 2 and rotatably connected to the transmission rod 110.

[0045] The circuit breaker in this embodiment is a three-pole circuit breaker, including three sets of contact systems and three sets of connectors 4 corresponding to the three sets of contact systems. Each set of contact systems includes one moving contact and one stationary contact. Each set of connectors 4 includes two connectors 4. The moving contact and stationary contact of each set are electrically connected to the two connectors 4 of each set. The two connectors 4 of each set are connected to the external line on the incoming and outgoing sides, respectively. The incoming side connectors 4 of the three sets of contact systems are located on the same side (upper side in the figure), and the outgoing side connectors 4 of the three sets of contact systems are located on the other side (lower side in the figure). A linkage mechanism 2 that cooperates with the rotating mechanism 3 is provided between the incoming and outgoing sides. Each connector 4 is provided with a rotating mechanism 3 that cooperates with the linkage mechanism 2. The transmission rod 110 of the transmission mechanism 1 drives multiple rotating mechanisms 3 to operate simultaneously through the linkage mechanism 2, thereby driving all connectors 4 to operate together.

[0046] Obviously, the circuit breaker can also be a single-pole, two-pole, three-pole, or more-pole circuit breaker. The drive mechanism can control only the multiple connectors 4 on the incoming or outgoing side of the multi-group contact system, while the connector 4 on the other side is controlled by other drive mechanisms. Alternatively, it can control only the two connectors 4 on the incoming and outgoing sides of a single-group contact system, or only one connector 4. All of these fall within the protection scope of this invention.

[0047] Preferably, the transmission mechanism 1 includes a transmission rod 110, and the linkage mechanism 2 includes a linkage rod 21. The linkage rod 21 is slidably disposed within the circuit breaker housing, and the linkage rod 21 is provided with multiple operating parts 23 that respectively cooperate with multiple sets of rotating mechanisms 3. One end of the transmission rod 110 is connected to the operating mechanism, and the other end is connected to the linkage rod 21. In this embodiment, the transmission mechanism 1 can drive multiple sets of rotating mechanisms 3 to rotate through the linkage mechanism 2, and then lock or unlock multiple sets of connectors 4 through the rotating mechanisms 3. This not only reduces the number of parts, eliminating the need to set up a transmission mechanism 1 and a linkage mechanism 2 for each set of connectors 4, but also allows the linkage mechanism 2 to act as a transition between the transmission mechanism 1 and the rotating mechanism 3, resulting in more reasonable torque transmission, better synchronization, and higher stability. It is understood that when only a single connector 4 is controlled, the linkage mechanism 2 may not be set up, and the transmission mechanism 1 can directly drive the connector 4 to unlock and lock through the rotating mechanism 3, all of which fall within the protection scope of this invention.

[0048] Preferably, another improvement of this invention is that a delayed idle stroke is provided on the transmission path between the operating mechanism or contact system and the connector 4. The delayed idle stroke includes a first idle stroke. When the circuit breaker transitions from a closed to an open state, the operating mechanism moves in the opening direction, driving the contact system to open. After the first idle stroke, the operating mechanism or contact system drives the connector to unlock, so that the contact system opens first and the connector unlocks later. The operating mechanism or contact system first drives the contact system to open, and after the first idle stroke, the operating mechanism drives the connector 4 to unlock, preventing an electric arc from occurring in the connector 4 during opening. When the circuit breaker transitions from an open to a closed state, the operating mechanism rotates in the closing direction. The operating mechanism or contact system first drives the connector 4 to lock. The operating mechanism continues to move, causing the contact system to close, and simultaneously passes through the first idle stroke. The operating mechanism first drives the connector 4 to lock via the driving mechanism, and then drives the circuit breaker to close, to ensure good conductivity between the contact system and the external line during the closing process, so as to avoid the electric repulsion force of the large current flowing through. The continued rotation of the operating mechanism to drive the circuit breaker closing action will still generate transmission along the transmission path between the operating mechanism or contact system and connector 4. At this time, connector 4 is already locked, and the first idle stroke can avoid this transmission. It can be understood that the delayed idle stroke can be set at the transmission point between the driving mechanism and the operating mechanism or contact system, or at the transmission point between the driving mechanism and connector 4, or between the transmission elements of the driving mechanism, or between the transmission elements inside connector 4.

[0049] A preferred embodiment of the first free travel is that the first free travel is formed between the first transmission structure and the second transmission structure in a transmission engagement. When the circuit breaker transitions from a closed to an open state, the first transmission structure is driven to travel through the first free travel and then contact the second transmission structure, driving the second transmission structure to move or rotate and unlock the connector. When the circuit breaker transitions from an open to a closed state, the first transmission structure is driven to move or rotate the second transmission structure and lock the connector. The operating mechanism continues to move, and when the contact system closes, the first transmission structure is driven to separate from the second transmission structure and travel through the first free travel.

[0050] like Figure 6-7 The connector 4 shown in this embodiment has a first free stroke set inside the connector 4. The connector 4 is provided with a clamping end for clamping an external conductive element. The connector 4 in this embodiment includes two sets of conductive structures 41 arranged opposite to each other. The two sets of conductive structures 41 are each rotatable around their respective centers, and the rotation centers of the two sets of conductive structures 41 can move closer and further apart. Two clamping ends are formed at both ends of the two sets of conductive structures 41. One end of the two sets of conductive structures 41 is used to clamp an internal conductive element, and the other end of the two sets of conductive structures 41 is used to clamp an external conductive element. In the figure, the internal conductive element is an internal conductive element 48, and the external conductive element is an external conductive element 47. The internal conductive element 48 is connected to the contact system inside the plug-in circuit breaker, and the external conductive element 47 is connected to an external circuit.

[0051] The outer sides of the two sets of conductive structures 41 are respectively provided with elastic clamping mechanisms for driving the two sets of conductive structures 41 to move closer to each other. The elastic clamping mechanism includes an elastic sheet 42. Between the two sets of conductive structures 41 is a spreading mechanism controlled by the driving mechanism of this embodiment. Under the control of the driving mechanism, the spreading mechanism can push open and avoid the two sets of conductive structures 41. The spreading mechanism includes a camshaft 43 disposed between the two sets of conductive structures 41 and operating shafts 44 respectively disposed at both ends of the axis of the camshaft 43. The operating shafts 44 are connected to the rotating mechanism 3. The camshaft 43 includes radial... The circuit breaker has a long diameter portion 45 and a short diameter portion 46. When the rotating mechanism 3 drives the camshaft 43 to rotate, the long diameter portion 45 aligns with the two sets of conductive structures 41, allowing it to open the two sets of conductive structures 41 and unlock the connector 4, releasing the clamping of the external conductive component and the internal conductive component 48. The short diameter portion 46 avoids the two sets of conductive structures 41. When the rotating mechanism 3 drives the camshaft 43 to rotate, and the short diameter portion 46 aligns with the two sets of conductive structures 41, the elastic plate 42 drives the connector 4 to lock, thereby clamping the external conductive component and the internal conductive component 48 by driving the two sets of conductive structures 41. After the rotating mechanism 3 drives the long diameter portion 45 to separate from the two sets of conductive structures 41, the elastic clamping mechanism drives the two sets of conductive structures 41 to move closer to lock the connector 4. Since the moving and stationary contacts of the circuit breaker are not closed at this time, the operating mechanism or contact mechanism continues to rotate, and the driving mechanism drives the camshaft 43 to continue rotating by a predetermined angle, moving the long diameter portion 45 away from the conductive structure 41.

[0052] In this embodiment, the camshaft 43 serves as the first transmission structure, and the two sets of conductive structures 41 serve as the second transmission structure. A first free travel is formed within the connector 4. When the circuit breaker transitions from an open to a closed state, after the operating mechanism or contact system drives the camshaft 43 to rotate via the drive mechanism to lock the connector 4, the operating mechanism continues to rotate to close the circuit breaker while simultaneously driving the camshaft 43 to continue rotating through the first free travel. When the circuit breaker transitions from a closed to an open state, after the operating mechanism or contact system drives the camshaft 43 to rotate through the first free travel via the drive mechanism, and after the circuit breaker opens, the camshaft 43 is driven to continue rotating so that the long diameter portion 45 pushes open the two sets of conductive structures 41 to unlock the connector 4. In this embodiment, the first free travel is located between the transmission elements inside the connector 4. It can be understood that the first free travel can also be located at the transmission point between the drive mechanism and the operating mechanism or contact system, or at the transmission point between the drive mechanism and the connector 4, or between the transmission elements of the drive mechanism. Alternatively, it can be understood that the connector 4 may not have a first free travel and may use other structures.

[0053] In other embodiments of connector 4, the camshaft 43 can also be located on the outside of the conductive structure 41, pushing the conductive structure 41 inward to clamp the external conductive element 47. Alternatively, the camshaft 43 can be located on the inside of the conductive structure 41, pushing one end of the conductive structure 41 to clamp the external conductive element 47 via a lever principle. Furthermore, the driving mechanism can also only drive the conductive structure 41 to clamp the external conductive element 47; when the conductive structure 41 is not driven to clamp, it is equivalent to opening the conductive structure 41.

[0054] In another embodiment of connector 4, connector 4 includes two sets of conductive structures. One set of conductive structures is fixedly installed, and the other set of conductive structures is rotatably installed via an elastic element. A clamping end for clamping an external conductive element is formed only between one end of the two sets of conductive structures. The elastic element drives the other set of conductive structures to rotate to one side, causing the clamping end to clamp the external conductive element and lock connector 4. A driving mechanism can drive the other set of conductive structures to rotate to the other side, causing the clamping end to release the clamp on the external conductive element and unlock connector 4. The fixed set of conductive structures can be a straight-line fixed conductive plate, which can be electrically connected to the contact system of a circuit breaker. The rotatably installed other set of conductive structures can adopt a similar design. Figure 6-7 One of the conductive structures 41, an opening mechanism connected to the drive mechanism can be provided between the other end of the two sets of conductive structures away from the clamping end of the external conductive component. The opening mechanism can be a camshaft structure.

[0055] In other embodiments of connector 4, connector 4 may further include a fixedly mounted fixed conductive plate and a fixedly mounted elastic plate, with a clamping end formed between the elastic plate and the fixed conductive plate to clamp the external conductive component, and an opening mechanism capable of driving the elastic plate to deform connected to the driving mechanism. All of these fall within the protection scope of this invention.

[0056] Preferably, the delayed idle travel further includes a second idle travel 112. When the circuit breaker transitions from a closed to an open state, the operating mechanism rotates in the opening direction, driving the contact system to open. After passing through the second idle travel 112 and the first idle travel, the operating mechanism or the contact system drives the connector to unlock, so that the contact system opens first and the connector unlocks later. When the circuit breaker transitions from an open to a closed state, the operating mechanism rotates in the closing direction. After passing through the second idle travel 112, the operating mechanism or the contact system drives the connector 4 to lock. The operating mechanism continues to rotate, causing the contact system to close, and simultaneously passes through the first idle travel. In this embodiment, the delayed idle travel consists of two idle travels. The length or time of the two idle travels can be adjusted as needed to better match the time difference between the circuit breaker's opening / closing and the connector's unlocking / locking. Of course, as needed, only one idle travel can be set, or three or more idle travels can be set to constitute the delayed idle travel. It is understood that the second idle stroke 112 and the first idle stroke can be located at any two of the following locations: the transmission point between the drive mechanism and the operating mechanism or the contact system, the transmission point between the drive mechanism and the connector 4, the transmission element between the drive mechanism, or the transmission element inside the connector 4.

[0057] Preferably, the second idle stroke 112 can be a sliding idle stroke. For example... Figure 1-2 As shown, a preferred embodiment of the second empty travel 112 is a sliding idle travel. The second empty travel 112 includes a hole-like structure and a locking structure. The locking structure slides or rotates within the hole-like structure. The hole-like structure includes at least two sidewalls that cooperate with the locking structure. There is a gap between the locking structure and the at least two sidewalls. After moving through the gap, the locking structure drives into cooperation with the at least two sidewalls. Specifically, the second empty travel 112 includes a rotating shaft structure 20 and an empty travel hole. The two end sidewalls of the empty travel hole form two spaced-apart driving structures 111. The rotating shaft structure 20 has a gap with the two driving structures 111. The rotating shaft structure 20 slides within the empty travel hole. After passing through the empty travel hole, the rotating shaft structure 20 drives into cooperation with the two driving structures 111. The empty travel hole is a hole-like structure, and the rotating shaft structure 20 is a locking structure. When the operating mechanism drives the circuit breaker to open, in the initial state, the rotating shaft structure 20 abuts against the left side of the empty travel hole, and both the moving contact and the connector are in a closed state. As the operating mechanism rotates, the moving contact rotates synchronously, tripping the circuit breaker. The operating mechanism continues to rotate, increasing the contact gap. The rotating shaft structure 20 moves through the gap from the left side of the empty travel hole to the right side, abutting against the right side of the empty travel hole. The operating mechanism continues to rotate, causing the drive mechanism to unlock the connector 4. (See also...) Figure 2The idle stroke hole and the rotating shaft structure 20 form a second idle stroke when the rotating shaft structure moves from one side of the idle stroke hole to the other side. The size of the idle stroke hole is larger than the diameter of the rotating shaft structure 20 to form the gap, and the rotating shaft structure 20 can move within the idle stroke hole. The transmission mechanism 1 drives the linkage mechanism 2 to operate through the rotating shaft structure 20.

[0058] Specifically, in this embodiment, a rotating shaft structure 20 and a free travel hole forming the second free travel 112 are provided between the linkage mechanism 2 and the transmission mechanism 1. The size of the free travel hole is larger than the diameter of the rotating shaft structure 20. The transmission mechanism 1 drives the linkage mechanism 2 to move through the rotating shaft structure 20. The transmission mechanism 1 includes two parallel transmission rods 110 arranged at intervals, and one end of each transmission rod 110 is provided with the free travel hole. The linkage mechanism 2 includes a linkage rod 21, and the two ends of the linkage rod 21 are provided with the rotating shaft structure 20. The rotating shaft structure 20 is inserted into the free travel holes of the two transmission rods 110. In this embodiment, the rotating shaft structure 20 is a long strip-shaped rotating shaft structure. The linkage rod 21 is provided with a linkage hole 22 that cooperates with the rotating shaft structure 20. The middle part of the rotating shaft structure 20 is located in the linkage hole 22, and the two ends extend out of the two ends of the linkage rod 21 and are inserted into the free travel holes of the two transmission rods 110. This embodiment realizes the second free travel through the cooperation of the second free travel 112 and the rotating shaft structure 20, which not only has the characteristics of simple structure and low cost, but also good stability. Of course, two rotating shaft structures 20 can also be set at both ends of the linkage rod 21. It is understood that the second idle stroke 112 is also set between the operating mechanism or contact system and the transmission mechanism 1, and / or between the transmission mechanism 1 and the linkage mechanism 2, and / or between the linkage mechanism 2 and the rotating mechanism 3; when the linkage mechanism 2 is not set, it can also be set between the transmission mechanism 1 and the rotating mechanism 3, all of which are within the protection scope of this invention.

[0059] Preferably, the second idle stroke 112 is a perforated structure and a retaining structure. The perforated structure is waist-shaped, arc-shaped, or V-shaped, and the retaining structure slides or rotates within the perforated structure. The sidewalls at both ends of the perforated structure respectively constitute the two driving structures 111 for driving the stroke, such as... Figure 1 As shown, the two end walls of the arc-shaped hole respectively constitute the two driving structures 111 for the rotational driving stroke, and the two side edges of the V-shaped hole constitute the two driving structures 111 for the eccentric oscillation driving stroke; or as... Figure 9 , 10 As shown, the driving structure 111 can be a first mating site 341 and a second mating site 342. The locking structure mates with the driving structure 111, for example, it can be... Figure 1 The rotating shaft structure 20 or Figure 9 , 10 The camshaft shown has a retaining surface 441.

[0060] like Figure 9-10 As shown, the second empty stroke can also be achieved through a rotating structure, that is, the second empty stroke is a rotational empty stroke. The rotating mechanism 3 includes a pivot hole 34 for driving the connector 4. The connector 4 is provided with an operating shaft 44 that mates with the pivot hole 34. The wall of the pivot hole 34 is provided with a first mating point 341 and a second mating point 342 that mate with the operating shaft 44. The distance between the first mating point 341 and the second mating point 342 is greater than the size of the operating shaft 44, forming a rotational empty stroke. After the rotating mechanism 3 rotates through the rotational empty stroke, it pushes the operating shaft 44 to rotate. In this embodiment, multiple rotational empty strokes are symmetrically arranged on the wall of the pivot hole 34. Originally, when the rotating mechanism 3 and the pivot hole 34 and the operating shaft 44 are matched in size, the operating shaft 44 on the connector 4 can be directly pushed through the wall of the pivot hole 34. The operating shaft 44 drives the connector 4 to unlock and lock. After setting the rotational empty stroke, it is necessary to pass through the rotational empty stroke first so that the wall of the pivot hole 34 can contact the operating shaft 44 and push the operating shaft 44 to rotate.

[0061] Specifically, such as Figure 9-10 As shown, the camshaft 43 is a structure that controls the opening and closing of the connector 4. Rotation of the camshaft 43 can drive the connector 4 to lock or unlock. Rotation of the rotating structure 30 can drive the camshaft 43 to rotate. The rotating structure 30 is provided with a pivot hole 34, and the camshaft 43 is provided with a retaining structure. The retaining structure includes four retaining surfaces 441 connected end-to-end to form a rectangle or rhombus shape. The pivot hole 34 is provided with mating areas corresponding one-to-one with the retaining surfaces 441. Each mating area is provided with a first mating point 341 and a second mating point 342. The rotating shaft is located at... Figure 9 When the position shown is reached, the retaining surface 441 engages with the second mating point 342. After rotating clockwise for a second idle stroke, the retaining surface 441 engages with the first mating point 341, reaching the desired position. Figure 10 Specifically, the first cohesion site 341 and the second cohesion site 342 can both be point-contact cohesion sites or surface-contact cohesion sites. The reverse is also true.

[0062] Preferably, as another embodiment, the first free stroke is arranged on the transmission path between the operating mechanism or contact system and the connector 4.

[0063] For example, in one embodiment, an elastic element is provided on the transmission path between the operating mechanism or contact system and the connector 4. The first idle stroke includes the deformation of the elastic element. The deformation of the elastic element absorbs the travel generated on the transmission path between the operating mechanism or contact system and the connector 4 when the circuit breaker transitions from the open to the closed state, after the connector is locked and the operating mechanism continues to rotate, driving the contact system to close. When the circuit breaker transitions from the open to the closed state, the operating mechanism rotates in the closing direction. The operating mechanism or contact system drives the drive mechanism to operate, driving the connector 4 to lock. At this time, the circuit breaker is not yet closed. The operating mechanism continues to rotate, driving the circuit breaker to close again. At this time, the rotation of the operating mechanism still drives the drive mechanism to operate. The drive mechanism compresses the elastic element, and the elastic element passes through the first idle stroke. For example, an elastic element is provided between the linkage mechanism 2 and the rotating mechanism 3. The operating mechanism or contact system drives the transmission mechanism 1 to move, drives the linkage mechanism 2 to slide, and then drives the rotating mechanism 3 to rotate, so that the connector 4 is locked. At this time, the circuit breaker has not yet closed. The operating mechanism continues to rotate and drives the circuit breaker to close. At the same time, the rotation of the operating mechanism still drives the transmission mechanism 1 to move, drives the linkage mechanism 2 to slide. At this time, after the connector 4 is locked, the rotating mechanism 3 and the connector 4 are limited and fixed. The linkage mechanism 2 compresses the elastic element between the linkage mechanism 2 and the rotating mechanism 3, and passes through the first empty stroke.

[0064] like Figure 1-2 As shown, in this embodiment, the transmission mechanism 1 of the circuit breaker's drive mechanism is connected to the contact support 113. The contact support 113 is rotatably mounted inside the circuit breaker housing. The operating mechanism drives the contact support 113 to rotate via a multi-link mechanism, causing the moving contact to cooperate with the stationary contact. When the circuit breaker opens or closes, the drive mechanism is driven by the contact support 113. Obviously, the drive mechanism can also be driven by the operating mechanism or the moving contact.

[0065] Specifically, the transmission mechanism 1 and the contact support 113 are rotatably connected via a support shaft 114. The contact support 113 includes a pivot portion 115 rotatably mounted on the circuit breaker. A first support hole 116, corresponding to one side of the pivot portion 115, is provided on the contact support 113 and connected to the support shaft 114. The transmission mechanism 1 includes two transmission rods 110 oppositely disposed at both ends of the contact support 113. Each of the two transmission rods 110 has a second support hole 117 that mates with the support shaft 114. The rotation of the contact support 113 drives the transmission mechanism 1 to move via the support shaft 114. The other ends of the two transmission rods 110 are respectively connected to both ends of a linkage rod 21. The linkage rod 21 and the contact support 113 are axially parallel and spaced apart.

[0066] In this embodiment, the transmission mechanism 1 is directly rotatably connected to the contact support 113 via the support shaft 114, featuring a simple structure and convenient assembly. It is understood that the transmission mechanism 1 can also be connected to the contact support 113 via screws or other means, or the transmission mechanism 1 can be integrally formed from the contact support 113. Furthermore, the number of transmission rods 110 can be adjusted; for example, an additional transmission rod 110 connected to the middle of the contact support 113 can be added, or transmission rods 110 can be provided only on one side. In addition, the transmission mechanism 1 can also be directly or indirectly connected to components such as the multi-link mechanism of the operating mechanism, which exhibit significant lateral displacement changes during opening and closing actions; all of these fall within the scope of protection of this invention. Preferably, the transmission mechanism 1 is driven by the contact support 113. When the operating mechanism trips, the contact support 113 drives the contact to open, which also unlocks the connector 4.

[0067] As one embodiment of the operating mechanism, the operating mechanism includes a mechanism support, a rocker arm assembly, a jump fastener, a locking fastener, a re-fastener, a first link, a second link, and a main tension spring. The rocker arm assembly, jump fastener, locking fastener, and re-fastener are rotatably mounted on the mechanism support. The multi-link mechanism includes the rocker arm assembly, jump fastener, locking fastener, re-fastener, first link, and second link. The jump fastener and locking fastener are locked together, and the locking fastener and re-fastener are limited together. The first link is rotatably connected to the jump fastener. One end of the second link is rotatably connected to the first link, and the other end is connected to the moving contact through the contact support 113. One end of the main tension spring is connected to the rocker arm assembly, and the other end is connected to the first link. The operation process and working principle of the operating mechanism are existing technologies and will not be described in detail here. It should be noted that when the operating mechanism drives the circuit breaker to open or close, the driving mechanism can also be driven by other components of the operating mechanism to unlock or lock the connector 4, such as the rocker arm assembly, the first link, or the second link.

[0068] like Figure 6 As shown, the rotating mechanism 3 in this embodiment includes two rocker arms 30 arranged opposite each other. Each rocker arm 30 includes a pivot arm 31 and a drive arm 33, and a connecting arm 32 connecting the pivot arm 31 and the drive arm 33. The pivot arms 31 of the two rocker arms 30 are connected to the connector 4 and are arranged opposite each other at both ends of the connector 4. The drive arms 33 of the two rocker arms 30 are arranged on one side of the connector 4 and connected to the linkage mechanism 2 through a second rotating shaft 36. The pivot arm 31 is provided with a pivot hole 34 that matches the cross-sectional shape of the operating shaft 44 of the connector 4. The pivot hole 34 can be fitted onto the upper limit of the operating shaft 44. The outer side of the housing of the connector 4 is provided with a limiting notch for limiting the rotation angle of the pivot arm 31. Of course, the rotating mechanism 3 can also drive the connector 4 with only one rocker arm 30, which provides better balance between the two rocker arms 30.

[0069] like Figure 5As shown, the linkage mechanism 2 in this embodiment includes a linkage rod 21, which is slidably disposed within the circuit breaker housing. The linkage rod 21 has a linkage hole 22 that mates with a rotating shaft structure 20. The middle portion of the rotating shaft structure 20 is located within the linkage hole 22. The two ends of the rotating shaft structure 20 located outside the linkage rod 21 respectively constitute transmission parts. These transmission parts are connected to the transmission rod 110 of the transmission mechanism 1. When the transmission rod 110 moves, it drives the linkage rod 21 to move via the rotating shaft structure 20. The linkage rod 21 then drives the operating part 23 and the guide mechanism on it to move. Alternatively, the rotating shaft structure 20 can be omitted, and the transmission part can be directly disposed on the linkage rod 21.

[0070] The linkage mechanism 2 includes two operating parts 23 disposed opposite to each other on both sides of the linkage rod 21. Each operating part 23 has an operating hole 24. A second rotating shaft 36 passing through the operating hole 24 is provided on the rocker arm 30 of the corresponding rotating mechanism 3. The size of the operating hole 24 is larger than that of the second rotating shaft 36, allowing the second rotating shaft 36 to move within the operating hole 24. When the operating part 23 moves, it pushes the second rotating shaft 36 through the hole wall of the operating hole 24, causing the rocker arm 30 to rotate. Simultaneously, the rocker arm 30 drives the second rotating shaft 36 to move along the length of the operating hole 24, thus avoiding the radius difference generated when the rotating mechanism 3 rotates. The rocker arm 30 drives the connector 4 to lock and unlock. Alternatively, when the linkage mechanism 2 is not provided, a first clearance hole can be provided at the connection between the transmission rod 10 and the rotating mechanism 3. The rotating mechanism 3 has a second rotating shaft 36 passing through the first clearance hole. The size of the first clearance hole is larger than that of the second rotating shaft 36, allowing the first clearance hole to move within the operating hole 24, thus avoiding the radius difference generated when the rotating mechanism 3 rotates.

[0071] Of course, the operating hole 24 can also be a groove structure, that is, one side of the operating hole 24 is closed and the second rotating shaft 36 is inserted from the other side, or one end of the operating hole 24 is open, which can also facilitate the installation of the second rotating shaft 36. As long as the two oppositely arranged side walls of the operating hole 24 can push the second rotating shaft 36 along the moving direction of the operating part 23, it is acceptable.

[0072] The linkage rod 21 is provided with a guide mechanism, which includes two guide plates 271 arranged opposite to each other, and an intermediate plate 272 connected between the tops of the two guide plates 271. A roller is provided between the two guide plates 271. The two ends of the roller are rotatably connected to the two guide plates 271 through guide shafts 274 respectively. The side of the roller extends out of the two guide plates 271 and rolls with the circuit breaker housing. In this embodiment, two sets of rollers are provided on each of the radial sides of the linkage rod 21, and the two sets of rollers on each side are arranged vertically.

[0073] It is understood that the number and position of the guiding mechanisms can also be adjusted, for example, by reducing the number of guiding mechanisms or adding guiding mechanisms in other spaces of the linkage 21. Furthermore, the guiding mechanisms can also slide with the circuit breaker instead of rolling, for example, by providing a corresponding groove on the circuit breaker, with the guiding mechanism being a boss that slides within that groove; all of these fall within the protection scope of this utility model.

[0074] Furthermore, the upper and lower sides of the linkage rod 21 are respectively provided with fixing plates 28. The fixing plates 28 are respectively connected to the bottom of the guide mechanism and the linkage mechanism 2. By supporting the guide mechanism and the linkage mechanism 2 through the fixing plates 28, the strength of the guide mechanism and the linkage mechanism 2 can be guaranteed. It is not necessary to design the linkage rod 21 body to be very large, and the internal space of the plug-in circuit breaker can be effectively utilized for installation.

[0075] The specific circuit breaker tripping process in this embodiment is as follows:

[0076] In the first stage, the contact support 113 rotates clockwise, causing the moving contact to leave the stationary contact. At the same time, the contact support 113 drives the transmission rod 110 through the second free stroke 112, that is, drives the transmission rod 110 to move, so that the right hole wall 1112 on the transmission rod 110 leaves the rotating shaft structure 20, and the left hole wall 1111 approaches the rotating shaft structure 20. Before the left hole wall 1111 contacts the rotating shaft structure 20, the rotating shaft structure 20, the linkage mechanism 2, the rotation mechanism 3 and the opening mechanism do not operate, and the connector 4 will not loosen the external conductive parts until the contact support 113 drives the moving contact to leave the stationary contact a certain distance, and the circuit breaker trips to disconnect the circuit.

[0077] In the second stage, the contact support 113 continues to rotate. When the left hole wall 1111 contacts the rotating shaft structure 20, it will continue to push the rotating shaft structure 20. The rotating shaft structure 20 drives the linkage mechanism 2 to move towards the contact support 113. The linkage mechanism 2 drives the rotating mechanisms 3 on both sides to swing towards the contact support 113. The rotating mechanism 3 drives the camshaft 43 of the opening mechanism to rotate. After the long diameter part 45 of the camshaft 43 rotates through the first idle stroke, it contacts the conductive structure 41, opens the conductive structure 41 to release the external conductive part, and unlocks the connector. Since the circuit breaker has already tripped and disconnected the external line in the first stage, the connector 4 will not generate an electric arc when it is released from the external conductive part without being energized.

[0078] The specific closing process in this embodiment is as follows:

[0079] In the first stage, the contact support 113 rotates counterclockwise, causing the moving contact to move closer to the stationary contact. At the same time, the contact support 113 drives the transmission rod 110 through the second idle stroke 112, that is, drives the transmission rod 110 to move. The left hole wall 1111 of the transmission rod 110 leaves the rotating shaft structure 20, and the right hole wall 1112 approaches the rotating shaft structure 20 until the right hole wall 1112 contacts the rotating shaft structure 20. During this process, the rotating shaft structure 20 and the opening mechanism do not move.

[0080] In the second stage, as the contact support 113 continues to rotate, the right hole wall 1112 pushes the rotating shaft structure 20 to move away from the contact support 113, and at the same time drives the rotating mechanisms 3 on both sides to swing away from the contact support 113. This causes the rotating mechanism 3 to drive the camshaft 43 of the opening mechanism to rotate, so that the long diameter part 45 of the camshaft 43 separates from the conductive structure 41. Under the drive of the elastic clamping mechanism, the conductive part is clamped, and the connector is locked. At this time, the moving contact and the stationary contact are not closed.

[0081] In the third stage, the contact support 113 continues to rotate, the right hole wall 1112 continues to push the rotating shaft structure 20, and the cam shaft 43 continues to rotate at a predetermined angle through the first empty stroke under the drive of the linkage mechanism 2. The long diameter part 45 further moves away from the conductive structure 41, and the contact support 113 drives the moving contact to contact the stationary contact, and the circuit is closed. Since the conductive structure 41 has clamped the external conductive parts in the second stage, it can effectively ensure good conductivity with the external line throughout the entire closing process.

[0082] The operating mechanism is existing technology. It includes an operating mechanism support, a rocker arm assembly, a locking element, a jump-locking element, and a re-locking element rotatably mounted on the support, as well as a crank and a connecting rod. The locking element engages with the jump-locking element, the re-locking element engages with the locking element for a limiting action, the crank is rotatably connected to the jump-locking element, and one end of the connecting rod is rotatably connected to the crank, while the other end is driven by the moving contact mechanism of the circuit breaker. The driving mechanism in this embodiment can cooperate with the aforementioned driving mechanism, or it can cooperate with the rocker arm assembly, crank, or connecting rod of the operating mechanism, or the contact support and moving contact of the contact system.

[0083] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the inventive concept, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A circuit breaker, comprising an operating mechanism, a contact system, and a connector (4) disposed within a circuit breaker housing, wherein the contact system is connected to a conductive element via the connector (4), and the connector (4) is provided with a clamping end for clamping the conductive element, characterized in that: It also includes a drive mechanism, which drives the operating mechanism or contact system. When the circuit breaker is open, the operating mechanism or contact system unlocks the connector (4) through the drive mechanism to release the clamping of the conductive parts. When the circuit breaker is closed, the operating mechanism or contact system locks the connector (4) through the drive mechanism to clamp the conductive parts.

2. The circuit breaker according to claim 1, characterized in that: The transmission path between the operating mechanism or contact system and the connector (4) is provided with a time-delayed empty stroke. The time-delayed empty stroke includes a first empty stroke. When the circuit breaker changes from the closed to the open state, the operating mechanism moves in the opening direction, drives the contact system to open, and after the first empty stroke, the operating mechanism or contact system drives the connector to unlock, so that the contact system opens first and the connector unlocks later. When the circuit breaker switches from open to closed state, the operating mechanism rotates in the closing direction. The operating mechanism or contact system first drives the connector (4) to lock. The operating mechanism continues to move, driving the contact system to close, and at the same time passes through the first empty stroke.

3. The circuit breaker according to claim 2, characterized in that: The delayed empty travel also includes a second empty travel (112). When the circuit breaker changes from closed to open state, the operating mechanism rotates in the opening direction to drive the contact system to open. After the second empty travel (112) and the first empty travel, the operating mechanism or the contact system drives the connector to unlock, so that the contact system opens first and the connector unlocks later. When the circuit breaker switches from open to closed state, the operating mechanism rotates in the closing direction. After passing through the second free stroke (112), the operating mechanism or the contact system drive connector (4) is locked. The operating mechanism continues to rotate, causing the contact system to close, and at the same time passes through the first free stroke.

4. The circuit breaker according to claim 2 or 3, characterized in that: The first free travel is formed between the first transmission structure and the second transmission structure in the transmission cooperation. When the circuit breaker changes from the closed to the open state, the first transmission structure is driven to contact the second transmission structure after passing through the first free travel, driving the second transmission structure to move or rotate and unlock the connector. When the circuit breaker changes from the open to the closed state, the first transmission structure is driven to move or rotate the second transmission structure and lock the connector. When the operating mechanism continues to move and the contact system closes, the first transmission structure is driven to separate from the second transmission structure and pass through the first free travel.

5. The circuit breaker according to claim 2 or 3, characterized in that: An elastic element is provided on the transmission path between the operating mechanism or contact system and the connector (4), and the first idle stroke includes the deformation of the elastic element.

6. The circuit breaker according to claim 2, characterized in that: The time delay travel is set at the transmission point between the drive mechanism and the operating mechanism or the contact system, or at the transmission point between the drive mechanism and the connector (4), or between the transmission elements of the drive mechanism, or between the transmission elements inside the connector (4).

7. The circuit breaker according to claim 2, characterized in that: The connector (4) includes two sets of conductive structures (41) arranged opposite to each other; the outer sides of the two sets of conductive structures (41) are respectively provided with elastic clamping mechanisms for driving the two sets of conductive structures (41) to approach each other, and a camshaft (43) and an operating shaft (44) respectively provided at both ends of the camshaft (43) axis are provided between the two sets of conductive structures (41). The camshaft (43) includes a long diameter part (45) and a short diameter part (46). The two ends of the long diameter part (45) can respectively push open the two sets of conductive structures (41), and the short diameter part (46) is used to avoid the two sets of conductive structures (41). When the camshaft (43) rotates, the long diameter part (45) pushes open the two sets of conductive structures (41) to unlock the connector (4) when it corresponds with the two sets of conductive structures (41), and the elastic clamping mechanism drives the two sets of conductive structures (41) to approach and lock the connector (4) when the short diameter part (46) corresponds with the two sets of conductive structures (41).

8. The circuit breaker according to claim 7, characterized in that: After the long diameter section (45) separates from the two sets of conductive structures (41), the camshaft (43) can continue to rotate, driving the long diameter section (45) away from the conductive structure (41) to form the first free stroke. After the operating mechanism or contact system drives the camshaft (43) to rotate through the drive mechanism to lock the connector (4), the operating mechanism continues to rotate to drive the circuit breaker to close, and at the same time, the drive mechanism drives the camshaft (43) to continue to rotate through the first free stroke.

9. The circuit breaker according to claim 3, characterized in that: The second empty stroke (112) is either a sliding empty stroke or a rotating empty stroke.

10. The circuit breaker according to claim 9, characterized in that: The second free stroke (112) includes a hole structure and a blocking structure. The blocking structure slides or rotates within the hole structure. The hole structure includes at least two sidewalls that cooperate with the blocking structure. There is a gap between the blocking structure and the at least two sidewalls. After the blocking structure moves through the gap, it drives to cooperate with the at least two sidewalls.

11. The circuit breaker according to claim 3, characterized in that: The driving mechanism includes a transmission mechanism (1) and a rotating mechanism (3). One end of the rotating mechanism (3) is connected to the connector (4). When the rotating mechanism (3) rotates, it can drive the connector (4) to unlock or lock. The transmission mechanism (1) includes a transmission rod (110). One end of the transmission rod (110) is rotatably connected to the operating mechanism or contact system, and the other end of the transmission rod (110) is driven by the rotating mechanism (3).

12. The circuit breaker according to claim 11, characterized in that: A first clearance hole is provided at the connection between the transmission rod (110) and the rotating mechanism (3). The rotating mechanism (3) is provided with a second rotating shaft (36) inserted into the first clearance hole. The size of the first clearance hole is larger than that of the second rotating shaft (36). The first clearance hole can move in the operating hole (24) to avoid the radius difference generated when the rotating mechanism (3) rotates.

13. The circuit breaker according to claim 11, characterized in that: The driving mechanism also includes a linkage mechanism (2), which is located between the transmission rod (110) and the rotating mechanism (3). The transmission rod (110) drives the rotating mechanism (3) to rotate through the linkage mechanism (2).

14. The circuit breaker according to claim 13, characterized in that: The linkage mechanism (2) includes an operating part (23), the operating part (23) is provided with an operating hole (24), and the rotating mechanism (3) is provided with a second rotating shaft (36) passing through the operating hole (24). The size of the operating hole (24) is larger than that of the second rotating shaft (36). The second rotating shaft (36) can move in the operating hole (24) to avoid the radius difference generated when the rotating mechanism (3) rotates.

15. The circuit breaker according to claim 13, characterized in that: Between the linkage mechanism (2) and the transmission mechanism (1), there is a rotating shaft structure (20) and a free stroke hole that form the second free stroke (112). The size of the free stroke hole is larger than the diameter of the rotating shaft structure (20). The transmission mechanism (1) drives the linkage mechanism (2) to move through the rotating shaft structure (20).

16. The circuit breaker according to claim 11, characterized in that: The second idle stroke (112) is a rotational idle stroke. The rotating mechanism (3) includes a pivot hole (34) for driving the connector (4). The connector (4) is provided with an operating shaft (44) that mates with the pivot hole (34). The wall of the pivot hole (34) is provided with a first mating point (341) and a second mating point (342) that mates with the operating shaft (44). The distance between the first mating point (341) and the second mating point (342) is greater than the size of the operating shaft (44) to form a rotational idle stroke. After the rotating mechanism (3) rotates through the rotational idle stroke, it pushes the operating shaft (44) to rotate.

17. The circuit breaker according to claim 1 or 2, characterized in that: The driving mechanism includes a transmission mechanism (1), a linkage mechanism (2), and a rotating mechanism (3). One end of the rotating mechanism (3) is connected to the connector (4). When the rotating mechanism (3) rotates, it can drive the connector (4) to unlock or lock. The transmission mechanism (1) includes a transmission rod (110). One end of the transmission rod (110) is rotatably connected to the operating mechanism or contact system. The other end of the transmission rod (110) is connected to the rotating mechanism (3) through the linkage mechanism (2) to drive the rotating mechanism (3) to rotate.

18. The circuit breaker according to claim 1, characterized in that: The contact system includes a moving contact, a stationary contact, and a contact support (113). The contact support (113) is rotatably mounted inside the circuit breaker housing. The moving contact is mounted on the contact support (113). The contact support (113) is connected to the operating mechanism and to the drive mechanism.

19. The circuit breaker according to claim 1, characterized in that: The operating mechanism includes a support frame, a rocker arm assembly, a jump fastener, a locking fastener, a re-fastener, a first link, a second link, and a main tension spring. The rocker arm assembly, jump fastener, locking fastener, and re-fastener are rotatably mounted on the support frame. The multi-link mechanism includes the rocker arm assembly, jump fastener, locking fastener, re-fastener, first link, and second link. The jump fastener and locking fastener are locked together, and the locking fastener and re-fastener are limited together. The first link is rotatably connected to the jump fastener. One end of the second link is rotatably connected to the first link, and the other end is connected to the moving contact. One end of the main tension spring is connected to the rocker arm assembly, and the other end is connected to the first link. The driving mechanism is connected to the rocker arm assembly, the first link, or the second link.

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