CN115621088A - Circuit breaker - Google Patents

Abstract

The circuit breaker comprises an operating mechanism, a contact system and a connector which are arranged in a circuit breaker shell, wherein the contact system is connected with a conductive piece through the connector, the connector is provided with a clamping end for clamping the conductive piece, the circuit breaker further comprises a driving mechanism, the driving mechanism 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 unlock through the driving mechanism, the clamping of the conductive piece is relieved, when the circuit breaker is closed, the operating mechanism or the contact system drives the connector to lock through the driving mechanism, the conductive piece is clamped, when the operating mechanism or the contact system drives the circuit breaker to be opened and closed, the connector is also driven to unlock or lock the conductive piece, and the circuit breaker is conveniently separated from an external conductive piece after the circuit breaker is opened.

Description

Circuit breaker

Technical Field

The invention relates to the field of low-voltage electric appliances, in particular to a circuit breaker.

Background

The circuit breaker is an important electrical element in the field of low-voltage electricity, and can connect and disconnect an external circuit, automatically cut off the circuit when overcurrent occurs or short circuit occurs in the external circuit, and protect the external circuit. In the existing plug-in circuit breaker, the contact assembly is connected with an external line through a connector in the circuit breaker.

Because the connector has a large clamping force, the prior plug-in circuit breaker is labor-consuming when the plug-in circuit breaker is inserted into or pulled out of an assembly position, and the connector and an external conductive piece are easy to wear, so the prior plug-in circuit breaker is also provided with a corresponding driving mechanism to open the connector when the switch is switched off, and the clamping force on the external conductive piece is reduced. However, the existing driving mechanism is independent of the operating mechanism of the circuit breaker, the opening and closing operations of the circuit breaker and the unlocking and locking operations of the connector are also independent and not related to each other, and the two groups of operations are completed independently, so that the operation is inconvenient. In addition, if the connector is disconnected with an external line before the breaker is opened, or the connector is locked with the conductive piece after the breaker is closed, electric arcs or temperature rise is easily generated in the connector at the moment, and the normal performance of the breaker is influenced.

Disclosure of Invention

The invention provides a circuit breaker, wherein a connector is linked with the motion state of an operating mechanism, and the connector and the operating mechanism can be turned off through one-time operation.

The invention also provides another breaker, which can lock the turn-off sequence of the operating mechanism and the connector, so that the connector is unlocked after the breaker is opened, or the breaker is switched on only after the connector is locked with the conductive piece.

In order to achieve the purpose, the invention adopts the following technical scheme:

the circuit breaker comprises an operating mechanism, a contact system and a connector which are arranged in a circuit breaker shell, wherein the contact system is connected with a conductive piece through the connector, the connector is provided with a clamping end for clamping the conductive piece, the circuit breaker further comprises a driving mechanism, the driving mechanism is in transmission with the operating mechanism or the contact system, when the circuit breaker is switched off, the operating mechanism or the contact system drives the connector to be unlocked through the driving mechanism, the clamping on the conductive piece is relieved, and when the circuit breaker is switched on, the operating mechanism or the contact system drives the connector to be locked through the driving mechanism, and the conductive piece is clamped.

Preferably, a transmission path between the operating mechanism or the contact system and the connector is provided with a delay idle stroke, the delay idle stroke comprises a first idle stroke, when the circuit breaker is switched from a closing state to an opening state, the operating mechanism moves towards the opening direction to drive the contact system to open, and after the circuit breaker passes through the first idle stroke, the operating mechanism or the contact system drives the connector to unlock, so that the contact system is opened firstly, and the connector is unlocked secondly; when the breaker is switched from an opening state to a closing state, the operating mechanism rotates towards the closing direction, the operating mechanism or the contact system is locked by the driving connector, the operating mechanism continues to move, the contact system is driven to be closed, and meanwhile, the circuit breaker passes through a first idle stroke.

Preferably, the delay idle stroke further comprises a second idle stroke, when the circuit breaker is switched from a closing state to an opening state, the operating mechanism rotates towards the opening direction to drive the contact system to open, and after the second idle stroke and the first idle stroke, the operating mechanism or the contact system drives the connector to unlock, so that the contact system is opened firstly, and the connector is unlocked secondly; when the breaker is switched from an opening state to a closing state, the operating mechanism rotates towards the closing direction, after the second idle stroke, the operating mechanism or the contact system drives the connector to be locked, the operating mechanism continues to rotate, the contact system is closed, and meanwhile, the first idle stroke is passed.

Preferably, the first idle stroke is formed between the first transmission structure and the second transmission structure which are in transmission fit, and when the circuit breaker is switched from a switching-on state to a switching-off state, the first transmission structure is driven to contact with the second transmission structure after passing through the first idle stroke so as to drive the second transmission structure to move or rotate, so that the connector is unlocked; when the breaker is switched from an opening state to a closing state, the first transmission structure is driven to drive the second transmission structure to move or rotate so that the connector is locked, the operating mechanism continues to move, and when the contact system is closed, the first transmission structure and the second transmission structure are driven to be separated and pass through a first idle stroke.

Preferably, an elastic member is arranged on a transmission path between the operating mechanism or the contact system and the connector, and the first idle stroke comprises deformation of the elastic member.

Preferably, the time-delay idle stroke is arranged at the transmission position of the driving mechanism and the operating mechanism or the contact system, or the transmission position of the driving mechanism and the connector, or between the transmission elements of the driving mechanism, or between the transmission elements inside the connector.

Preferably, the connector comprises two sets of conductive structures arranged oppositely; the outer sides of the two groups of conductive structures are respectively provided with an elastic clamping mechanism for driving the two groups of conductive structures to approach each other, a cam shaft and operating shafts respectively arranged at two ends of the axis of the cam shaft are arranged between the two groups of conductive structures, the cam shaft comprises a long-diameter part and a short-diameter part, two ends of the long-diameter part can respectively push open the two groups of conductive structures, and the short-diameter part is used for avoiding the two groups of conductive structures; the camshaft rotates to jack the two groups of conductive structure unlocking connectors when the long diameter part corresponds to the two groups of conductive structures, and the elastic clamping mechanism drives the two groups of conductive structures to be close to the locking connectors when the short diameter part corresponds to the two groups of conductive structures.

Preferably, after the long diameter part is separated from the two groups of conductive structures, the cam shaft can continue to rotate to drive the long diameter part to be far away from the conductive structures to form a first idle stroke, and after the operating mechanism or the contact system drives the cam shaft to rotate through the driving mechanism to lock the connector, the operating mechanism continues to rotate to drive the breaker to be switched on and simultaneously drives the cam shaft to continue to rotate through the first idle stroke through the driving mechanism.

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

Preferably, the second idle stroke includes poroid structure and card fender structure, the card keeps off the structure and is in slide or rotate in the poroid structure, poroid structure include with two at least lateral walls of card fender structure complex, the card keep off the structure with two at least lateral walls between have the clearance, the card keep off the structure and remove the process the clearance after with two at least lateral wall drive coordination.

Preferably, the driving structure comprises a transmission mechanism and a rotating mechanism, one end of the rotating mechanism is connected with the connector, and the rotating mechanism can drive the connector to be unlocked or locked when rotating; the transmission mechanism comprises a transmission rod, one end of the transmission rod is rotatably connected with the operating mechanism or the contact system, and the other end of the transmission rod is in transmission with the rotating mechanism.

Preferably, the transfer line with rotary mechanism's junction is provided with the first hole of dodging, rotary mechanism is equipped with the second pivot of cartridge in the first hole of dodging, and the size in the first hole of dodging is greater than the second pivot of dodging, and the first hole of dodging can remove in the handle hole for dodge the radius difference that the rotary mechanism produced when rotating.

Preferably, the driving mechanism further comprises a linkage mechanism, the linkage mechanism is arranged between the transmission rod and the rotating mechanism, and the transmission rod drives the rotating mechanism to rotate through the linkage mechanism.

Preferably, the linkage mechanism comprises an operating part, the operating part is provided with an operating hole, the rotating mechanism is provided with a second rotating shaft penetrating 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 in the operating hole and is used for avoiding the radius difference generated when the rotating mechanism rotates.

Preferably, a rotating shaft structure and an idle stroke hole which form the second idle stroke are arranged between the linkage mechanism and the transmission mechanism, the size of the idle stroke hole is larger than the diameter of the rotating shaft structure, and the transmission mechanism drives the linkage mechanism to act through the rotating shaft structure.

Preferably, the second idle stroke is a rotation idle stroke, the rotating mechanism includes a pivot hole for driving the connector, the connector is provided with an operating shaft matched with the pivot hole, a first matching point and a second matching point with the operating shaft are arranged on the hole wall of the pivot hole, the distance between the first matching point and the second matching point is larger than the size of the operating shaft to form the rotation idle stroke, and the rotating mechanism pushes the operating shaft to rotate after rotating through the rotation idle stroke.

Preferably, the driving structure comprises a transmission mechanism, a linkage mechanism and a rotating mechanism, one end of the rotating mechanism is connected with the connector, and the rotating mechanism can drive the connector to be unlocked or locked when rotating; the transmission mechanism comprises a transmission rod, one end of the transmission rod is rotationally connected with the operating mechanism or the contact system, and the other end of the transmission rod drives the rotating mechanism to rotate through the linkage mechanism.

Preferably, the contact system comprises a moving contact, a fixed contact and a contact support, the contact support is rotatably installed in the shell of the circuit breaker, the moving contact is installed on the contact support, the contact support is connected with the operating mechanism, and the contact support is connected with the driving mechanism.

Preferably, the operating mechanism comprises a mechanism support, a rocker arm assembly, a tripping element, a locking element, a re-locking element, a first connecting rod, a second connecting rod and a main tension spring, the rocker arm assembly, the tripping element, the locking element and the re-locking element are respectively and rotatably arranged on the mechanism support, the multi-connecting-rod mechanism comprises the rocker arm assembly, the tripping element, the locking element, the re-locking element, the first connecting rod and the second connecting rod, the tripping element is matched with the locking element in a locking way, the locking element is in limit matching with the re-locking element, the first connecting rod is rotatably connected with the tripping element, one end of the second connecting rod is rotatably connected with the first connecting rod, the other end of the second connecting rod is connected with the moving contact, one end of the main tension spring is connected with the rocker arm assembly, and the other end of the main tension spring is connected with the first connecting rod; the driving mechanism is connected with the rocker arm assembly or the first connecting rod or the second connecting rod.

According to the circuit breaker, the operating mechanism or the contact system drives the connector to unlock or lock the conductive piece when the circuit breaker is driven to be switched on and switched off, so that the circuit breaker is conveniently separated from the external conductive piece after the circuit breaker is switched off.

In addition, the operating mechanism or the contact system drives the breaker to open the brake first, and then the driving mechanism drives the connector to unlock, so that the conductive piece is released from being clamped, and electric arcs are prevented from occurring in the connector during brake opening; the operating mechanism or the contact system drives the connector to lock to clamp the conductive piece and then drives the breaker to close, so that good conductivity is ensured between the contact system and an external circuit in the closing process, and the flowing large-current electric repulsion force is avoided.

Drawings

Fig. 1 is a schematic diagram of a part of the internal structure of an embodiment of the inventive circuit breaker;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a schematic structural diagram of the driving mechanism and the connector in the state that the circuit breaker is opened and the connector is unlocked;

fig. 4 is a schematic structural diagram of the driving mechanism and the connector in a state that the circuit breaker is closed and the connector is locked;

FIG. 5 is a schematic structural view of a linkage mechanism;

FIG. 6 is a schematic view of the construction of the connector;

FIG. 7 is an exploded view of the connector;

FIG. 8 is a schematic structural view of a camshaft of the connector;

FIG. 9 is a view of the pivot hole of the swivel mechanism mating with the operating shaft of the connector;

fig. 10 is another mating of the pivot hole on the swivel mechanism with the operating shaft on the connector.

Detailed Description

The following description will further describe the embodiment of the driving mechanism according to the present invention with reference to the embodiments shown in fig. 1 to 10. The drive mechanism of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-2, the circuit breaker of the present invention includes an operating mechanism, a contact system and a connector 4, the operating mechanism, the contact system and the connector 4 are disposed in a housing of the circuit breaker, the contact system is connected to a conductive member through the connector 4, the connector 4 is provided with a clamping end for clamping the conductive member, a driving mechanism 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 4 to unlock through the driving mechanism, the clamping of the conductive member is released, when the circuit breaker is closed, the operating mechanism or the contact system drives the connector 4 to lock through the driving mechanism, and the conductive member is clamped.

According to the circuit breaker, the operating mechanism drives the connector 4 to unlock or lock the conductive piece when the circuit breaker is switched on and off, so that the circuit breaker is conveniently separated from the conductive piece, and the circuit breaker and the conductive piece are clamped when the circuit breaker is switched on, and the circuit breaker is simple and convenient to operate.

As shown in fig. 1, the circuit breaker of this embodiment is a plug-in circuit breaker, and includes an operating mechanism, a contact system and a connector 4 which are arranged in a circuit breaker housing, where the contact system includes a moving contact, a fixed contact and a contact support 113, the contact support 113 is rotatably installed in the circuit breaker housing, the moving contact is installed on the contact support 113, the contact support 113 is connected with the operating mechanism, the operating mechanism drives the moving contact to swing through the contact support 113 to cooperate with the fixed contact to realize switching on and off of the circuit breaker, the contact system is connected with an external conductive component through the connector 4, the connector 4 is provided with a clamping end for clamping the external conductive component, and the external conductive component clamped by the connector 4 is an external conductive component 47 in the figure.

The circuit breaker comprises a driving mechanism connected with the connector 4, when the circuit breaker is opened or closed, an operating mechanism or a contact system drives the connector 4 to unlock or lock through the driving mechanism, when the operating mechanism drives the circuit breaker to be opened, the driving contact support 113 rotates to the opening position, the moving contact rotates to be separated from the static contact, the operating mechanism or the contact support 113 or the moving contact further drives the connector 4 to unlock through the driving mechanism, the clamping on the external conductive piece is released, when the operating mechanism drives the circuit breaker to be closed, the driving contact support 113 rotates to the closing position, the moving contact rotates to be in contact fit with the static contact, and the operating mechanism or the contact support 113 or the moving contact further drives the connector 4 to lock through the driving mechanism, so that the external conductive piece is clamped.

Preferably, the driving structure of 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, the rotating mechanism 3 can be driven to unlock or lock when rotating, so as to drive the connector 4 to rotate towards the unlocking direction or rotate towards the locking direction, and 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, and the connector 4 is locked or unlocked. The transmission mechanism 1 comprises a transmission rod 110, the transmission rod 110 is arranged 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 with the operating mechanism or the contact system, and the other end of the transmission rod 110 is in transmission connection with the connector 4 through the rotating mechanism 3.

Preferably, the driving mechanism further comprises a linkage mechanism 2, the plurality of connectors 4 are synchronously driven to be unlocked or locked through the linkage mechanism 2, and the plurality of rotating mechanisms 3 are respectively rotatably mounted on the plurality of connectors 4 and are respectively connected with the linkage mechanism 2; the transmission mechanism 1 drives the plurality of rotating mechanisms 3 to rotate through the linkage mechanism 2. The linkage mechanism 2 is arranged between the transmission rod 110 and the rotating mechanism 3, the linkage mechanism 2 is provided with a transmission part matched with the transmission rod 110, and the transmission rod 110 drives the rotating mechanism 3 to rotate through the linkage mechanism 2. Preferably, the transmission parts are arranged at two ends of the linkage mechanism 2 and are respectively connected with the transmission rod 110 in a rotating manner.

The circuit breaker of this embodiment is a three-pole circuit breaker, and includes three contact systems of group to and correspond three group connectors 4 that set up respectively with three contact systems of group, every group contact system includes a moving contact and a static contact, and every group connector 4 includes two connectors 4, and the moving contact and the static contact of every group are connected with two connectors 4 electricity of every group respectively. Two connectors 4 of every group are the incoming line side and are gone out the line side and be connected with the external line respectively, and the incoming line side connector 4 of three contact systems of group sets up in same one side (the upside in the picture), and the side connector 4 of being qualified for the next round of competitions of three contact systems sets up the opposite side (the downside in the picture), be equipped with between incoming line side and the side of being qualified for the next round of competitions with rotary mechanism 3 complex link gear 2, be equipped with respectively on every connector 4 with link gear 2 complex rotary mechanism 3, drive mechanism 1's transfer line 110 drives a plurality of rotary mechanism 3 simultaneous movement respectively through link gear 2, and then drives all connectors 4 and moves together.

It is obvious that the circuit breaker may also be a single-pole, two-pole or three-pole or more-pole circuit breaker, and the driving mechanism may control only a plurality of connectors 4 on the incoming line side or outgoing line side of a plurality of groups of contact systems, and the connector 4 on the other side is controlled by other driving mechanisms, or may control only two connectors 4 on the incoming line side and outgoing line side of a single group of contact systems, or only one connector 4, all falling within the protection scope of the present invention.

Preferably, the transmission mechanism 1 includes a transmission rod 110, the linkage mechanism 2 includes a linkage rod 21, the linkage rod 21 is slidably disposed in the circuit breaker housing, the linkage rod 21 is provided with a plurality of operation portions 23 respectively matched with the plurality of groups of rotating mechanisms 3, one end of the transmission rod 110 is connected with the operation mechanism, and the other end of the transmission rod is connected with the linkage rod 21. The drive mechanism 1 of this embodiment can drive multiunit rotary mechanism 3 through link gear 2 and rotate, and rethread rotary mechanism 3 locks or unblock multiunit connector 4, not only can reduce the quantity of part, need not set up drive mechanism 1 and link gear 2 respectively to every group connector 4, can also play the effect of transition through link gear 2 between drive mechanism 1 and rotary mechanism 3 in addition, and transmission moment is more reasonable, and the synchronism is better, and stability is also higher. It can be understood that, when only a single connector 4 is controlled, the linkage mechanism 2 may not be provided, and the transmission mechanism 1 may directly drive the connector 4 to unlock and lock through the rotating mechanism 3, all of which belong to the protection scope created by the present invention.

Preferably, another improvement point created by the present invention is that a delay idle stroke is arranged on a transmission path between the operating mechanism or the contact system and the connector 4, the delay idle stroke includes a first idle stroke, when the circuit breaker is switched from a closing state to an opening state, the operating mechanism moves towards a switching direction to drive the contact system to open, and after the first idle stroke, the operating mechanism or the contact system drives the connector to unlock, so that the contact system opens first, and the connector unlocks later; the operating mechanism or the contact system is opened before the moving contact system, and after the first idle stroke, the operating mechanism drives the connector 4 to unlock, so that electric arc is prevented from occurring in the connector 4 during opening. When the breaker is switched from an opening state to a closing state, the operating mechanism rotates towards a closing direction, the operating mechanism or the contact system drives the connector 4 to be locked firstly, the operating mechanism continues to move, the contact system is closed, and meanwhile, the circuit breaker passes through a first idle stroke; the operating mechanism firstly drives the connector 4 to be locked through the driving mechanism, and then drives the breaker to be switched on, so that good conductivity is ensured between a contact system and an external circuit in the switching-on process, and the flowing large-current electric repulsion force is avoided. The continuous rotation of the operating mechanism drives the circuit breaker to perform a closing action, transmission still can be generated on a transmission path between the operating mechanism or the contact system and the connector 4, at the moment, the connector 4 is locked, and the transmission at the moment can be avoided through a first idle stroke. It will be appreciated that the time-delay lost motion may be provided where the drive mechanism is in communication with the operating mechanism or contact system, or where the drive mechanism is in communication with the connector 4, or between a transmission element of the drive mechanism, or between a transmission element within the connector 4.

The first idle stroke is formed between a first transmission structure and a second transmission structure which are in transmission fit, and when the circuit breaker is switched from a closing state to an opening state, the first transmission structure is driven to pass through the first idle stroke and then to be in contact with the second transmission structure to drive the second transmission structure to move or rotate so as to unlock the connector; when the circuit breaker is switched from an opening state to a closing state, the first transmission structure is driven to drive the second transmission structure to move or rotate so that the connector is locked, the operating mechanism continues to move, and when the contact system is closed, the first transmission structure and the second transmission structure are driven to be separated and pass through a first idle stroke.

As shown in fig. 6 to 7, in the connector 4 of the type in which the first idle stroke is provided in the connector 4, the connector 4 is provided with a clamping end for clamping an external conductive member. The connector 4 of this embodiment includes two sets of conductive structures 41 arranged oppositely, the two sets of conductive structures 41 can rotate around their respective middle portions, and the rotation centers of the two sets of conductive structures 41 can approach and separate from each other, two clamping ends are formed at two ends of the two sets of conductive structures 41, one end of the two sets of conductive structures 41 is used for clamping an internal conductive member, the other end of the two sets of conductive structures 41 is used for clamping an external conductive member, in the figure, the internal conductive member is an internal conductive member 48, the external conductive member is an external conductive member 47, the internal conductive member 48 is connected with a contact system in the plug-in circuit breaker, and the external conductive member 47 is connected with an external circuit;

the outer sides of the two groups of conductive structures 41 are respectively provided with an elastic clamping mechanism for driving the two groups of conductive structures 41 to approach each other, the elastic clamping mechanism comprises an elastic sheet 42, an opening mechanism controlled by the driving mechanism of the embodiment is arranged between the two groups of conductive structures 41, and the opening mechanism can be used for ejecting and avoiding the two groups of conductive structures 41 under the control of the driving mechanism; the opening mechanism comprises a cam shaft 43 arranged between two groups of conductive structures 41 and operating shafts 44 respectively arranged at two ends of the axis of the cam shaft 43, the operating shafts 44 are connected with the rotating mechanism 3, the cam shaft 43 comprises a long diameter part 45 and a short diameter part 46 which are radially arranged, the rotating mechanism 3 drives the cam shaft 43 to rotate so that the long diameter part 45 and the two groups of conductive structures 41 can be respectively pushed open when corresponding to the two groups of conductive structures 41 to unlock the connectors 4 and release the clamping of the external conductive part and the internal conductive part 48, the short diameter part 46 is used for avoiding the two groups of conductive structures 41, the rotating mechanism 3 drives the cam shaft 43 to rotate so that the short diameter part 46 and the two groups of conductive structures 41 correspond to each other, the elastic sheet 42 drives the connectors 4 to lock, and the external conductive part and the internal conductive part 48 are clamped by driving the two groups of conductive structures 41. After the rotating mechanism 3 drives the long diameter portion 45 to be separated from the two sets of conductive structures 41, the elastic clamping mechanism drives the two sets of conductive structures 41 to approach to the connector 4, and since the moving and static contacts of the circuit breaker are not switched on at this time, the operating mechanism or the contact mechanism continues to rotate, the driving mechanism drives the cam shaft 43 to continue to rotate by a predetermined angle, and drives the long diameter portion 45 to be far away from the conductive structures 41.

That is, the cam shaft 43 is used as a first transmission structure, the two groups of conductive structures 41 are used as second transmission structures, the first idle stroke is formed in the connector 4, and when the circuit breaker is switched from the opening state to the closing state, after the operating mechanism or the contact system drives the cam shaft 43 to rotate through the driving mechanism so as to lock the connector 4, the operating mechanism continues to rotate to drive the circuit breaker to close the circuit breaker, and simultaneously drives the cam shaft 43 to continue to rotate through the first idle stroke through the driving mechanism; when the circuit breaker is switched from a closing state to an opening state, the operating mechanism or the contact system drives the cam shaft 43 to rotate through a first idle stroke through the driving mechanism, and then drives the cam shaft 43 to rotate continuously to enable the long diameter part 45 to jack the two groups of conductive structures 41 to unlock the connector 4 after the circuit breaker is opened. The present embodiment provides a first idle stroke between the transmission elements inside the connector 4, it being understood that the first idle stroke is also provided between the transmission of the drive mechanism to the operating mechanism or contact system, or the transmission of the drive mechanism to the connector 4, or the transmission elements of the drive mechanism. It will also be appreciated that the first lost motion may not be provided in the connector 4, and other configurations may be used.

As other embodiments of the connector 4, the cam shaft 43 may be disposed outside the conductive structure 41 to push the conductive structure 41 to clamp the outer conductive member 47, or the cam shaft 43 may be disposed inside the conductive structure 41 to push one end of the conductive structure 41 to drive the conductive structure 41 to clamp the outer conductive member 47 by the principle of leverage. Alternatively, the driving mechanism may drive only the conductive structure 41 to clamp the outer conductive member 47, which is equivalent to opening the conductive structure 41 when the conductive structure 41 is not driven to clamp.

As another embodiment of the connector 4, the connector 4 includes two sets of conductive structures, one set of conductive structures is fixedly installed, the other set of conductive structures is rotatably installed through an elastic member, a clamping end for clamping the external conductive member is formed only between one ends of the two sets of conductive structures, and the elastic member drives the other set of conductive structures to rotate towards one side, so that the clamping end clamps the external conductive member, and the connector 4 is locked; the driving mechanism can drive the other group of conductive structures to rotate towards the other side, so that the clamping end releases the clamping of the external conductive piece, and the connector 4 is unlocked. The fixed group of conducting structures can be a straight-line-shaped fixed conducting plate which can be electrically connected with a contact system of the circuit breaker, the other group of conducting structures which are installed in a rotating mode can adopt a conducting structure 41 similar to that in fig. 6-7, an opening mechanism connected with a driving mechanism can be arranged between the other ends, far away from a clamping end for clamping the external conducting piece, of the two groups of conducting structures, and the opening mechanism can adopt a camshaft structure.

As other embodiments of the connector 4, the connector 4 may further include a fixed conductive plate fixedly mounted, and a fixed elastic plate, a clamping end for clamping the external conductive member is formed between the elastic plate and the fixed conductive plate, and the expanding mechanism capable of driving the elastic plate to deform is connected to the driving mechanism. All fall within the scope of protection of the invention.

Preferably, the delay idle stroke further includes a second idle stroke 112, when the circuit breaker is switched from a closing state to an opening state, the operating mechanism rotates towards the opening direction to drive the contact system to open, and after the second idle stroke 112 and the first idle stroke, the operating mechanism or the contact system drives the connector to unlock, so that the contact system is opened first, and the connector is unlocked later; when the breaker is switched from the opening state to the closing state, the operating mechanism rotates towards the closing direction, after the second idle stroke 112, the operating mechanism or the contact system drives the connector 4 to be locked, and then the operating mechanism continues to rotate, so that the contact system is closed, and meanwhile, the first idle stroke is passed. The delay idle stroke of this embodiment comprises two idle strokes, can adjust the length or the time of two idle strokes as required to better cooperation circuit breaker divide-shut brake and connector unblock and the time difference between the locking, of course according to needs also can only set up an idle stroke, or set up three or more idle strokes and constitute delay idle stroke. It will be appreciated that the second idle stroke 112 and the first idle stroke may be located at any two of the transmission point of the drive mechanism to the operating mechanism or contact system, or the transmission point of the drive mechanism to the connector 4, or between transmission elements of the drive mechanism, or between transmission elements inside the connector 4, respectively.

Preferably, the second idle stroke 112 may be a sliding idle stroke. As shown in fig. 1-2, a sliding idle stroke is a preferred embodiment of the second idle stroke 112, and the second idle stroke 112 includes a hole structure and a catch structure, and the catch structure slides or rotates in the hole structure. The hole-shaped structure comprises at least two side walls matched with the blocking structure, a gap is formed between the blocking structure and the at least two side walls, and the blocking structure moves through the gap and then is in driving fit with the at least two side walls. Specifically, second idle stroke 112 includes transmission fit's pivot structure 20 and idle stroke hole, and the both ends lateral wall in idle stroke hole forms two drive structure 111 that the interval set up, and pivot structure 20 has the clearance with two drive structure 111, and pivot structure 20 is for sliding in the idle stroke hole, and pivot structure 20 is through behind the idle stroke hole with two drive structure 111 drive fit, the idle stroke hole is the porous structure, pivot structure 20 is the card structure of keeping off. When the operating mechanism drives the breaker to open, in an initial state, the rotating shaft structure 20 abuts against the left side of the idle stroke hole, and the moving contact and the connector are both in a closed state. The operating mechanism rotates, the moving contact synchronously rotates, the breaker is opened, the operating mechanism continues to rotate, the opening distance between the contacts is increased, and the rotating shaft structure 20 moves from the left side of the idle stroke hole to the right side of the idle stroke hole through the gap and is abutted against the right side of the idle stroke hole; the operating mechanism continues to rotate and the drive mechanism drives the connector 4 to unlock. Referring to fig. 2, the idle stroke hole and shaft structure 20 forms a second idle stroke when the 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 first rotating shaft 20 to form the gap, the rotating shaft structure 20 can move in the idle stroke hole, and the transmission mechanism 1 drives the linkage mechanism 2 to act through the rotating shaft structure 20.

Specifically, in this embodiment, a rotating shaft structure 20 and an idle stroke hole forming the second idle stroke 112 are disposed between the linkage mechanism 2 and the transmission mechanism 1, the size of the idle stroke hole is larger than the diameter of the rotating shaft structure 20, and the transmission mechanism 1 drives the linkage mechanism 2 to move through the rotating shaft structure 20. The transmission mechanism 1 comprises two transmission rods 110 arranged in parallel at intervals, one ends of the two transmission rods 110 are provided with the idle stroke holes, the linkage mechanism 2 comprises a linkage rod 21, two ends of the linkage rod 21 are provided with rotating shaft structures 20, and the rotating shaft structures 20 are inserted into the idle stroke holes of the two transmission rods 110. In this embodiment, the linkage rod 21 is provided with a linkage hole 22 matching with the rotation shaft structure 20, the middle part of the rotation shaft structure 20 is located in the linkage hole 22, and the two ends of the rotation shaft structure 20 extend out of the two ends of the linkage rod 21 and are inserted into the idle stroke holes of the two transmission rods 110. In the embodiment, the second idle stroke is realized by matching the second idle stroke 112 with the rotating shaft structure 20, so that the structure is simple, the cost is low, and the stability is good. Of course, two rotating shaft structures 20 may be disposed at two ends of the linkage rod 21. Of course, it is understood that the second idle stroke 112 is also provided between the operating mechanism or the 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 arranged, the linkage mechanism can also be arranged between the transmission mechanism 1 and the rotating mechanism 3, and the invention belongs to the protection scope of the invention.

Preferably, the second idle stroke 112 is a hole structure and a blocking structure, the hole structure is a kidney-shaped structure, an arc-shaped structure or a V-shaped structure, and the blocking structure slides or rotates in the hole structure. The two driving structures 111 are respectively formed by the side walls at the two ends of the hole-shaped structure and used for driving the stroke, as shown in fig. 1, the two driving structures 111 are respectively formed by the hole walls at the two ends of the arc-shaped hole and used for the driving stroke of rotation, and the two driving structures 111 are formed by the side edges at the two sides of the V-shaped hole and used for the driving stroke of eccentric swinging; or as shown in fig. 9 and 10, the actuation structure 111 can be a first engagement site 341 and a second engagement site 342. The catch structure cooperates with the driving structure 111, and may be, for example, the rotating shaft structure 20 shown in fig. 1 or the catch surface 441 on the camshaft shown in fig. 9 and 10.

As shown in fig. 9-10, the second idle stroke may also be implemented by a rotating structure, that is, the second idle stroke is a rotating 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 matched with the pivot hole 34, a hole wall of the pivot hole 34 is provided with a first matching point 341 and a second matching point 342, the distance between the first matching point 341 and the second matching point 342 is greater than the size of the operating shaft 44 to form a rotating idle stroke, the rotating mechanism 3 pushes the operating shaft 44 to rotate after rotating the rotating idle stroke, in this embodiment, a plurality of rotating idle strokes are centrally and symmetrically arranged on the hole wall of the pivot hole 34, when the rotating mechanism 3 is matched with the size of the pivot hole 34 and the operating shaft 44, the operating shaft 44 on the connector 4 may be directly pushed through the pivot hole 34, the connector 4 is driven to unlock and lock by the operating shaft 44, and after the rotating idle stroke is set, the hole needs to pass through the rotating idle stroke first to make the hole wall of the pivot hole 34 contact with the operating shaft 44 to push the operating shaft 44 to rotate.

Specifically, as shown in fig. 9-10, the cam shaft 44 is a structure for controlling the opening and closing of the connector 4, and the rotation of the cam shaft 44 can drive the connector 4 to be locked or unlocked. Rotation of the rotary structure 30 may drive rotation of the camshaft 44. The rotating structure 30 is provided with a pivot hole 34, the cam shaft 44 is provided with a blocking structure, and the blocking structure comprises four blocking surfaces 441 which are connected end to form a rectangle or a rhombus; the pivot hole 34 is provided with matching areas corresponding to the blocking surfaces 441 one by one, each matching area is provided with a first matching point 341 and a second matching point 342, when the rotating shaft is located at the position shown in fig. 9, the blocking surfaces 441 are matched with the second matching points 342, after the rotating shaft needs to rotate clockwise for a second idle stroke, the blocking surfaces 441 are matched with the first matching points 341 to reach the position shown in fig. 10, and specifically, the first matching points 341 and the second matching points 342 can be point-contact matching points or surface-contact matching points. And vice versa.

Preferably, as a further embodiment, a first idle stroke is provided in the transmission path between the operating means or contact system and the connector 4.

For example, in one embodiment, the drive path between the operating mechanism or contact system and the connector 4 is provided with a spring. The first idle stroke comprises deformation of an elastic piece, when the deformation of the elastic piece absorbs the switching state of the circuit breaker from the opening state to the closing state, the operating mechanism continues to rotate after the connector is locked, and when the contact system is driven to close, the operating mechanism or the stroke generated on a transmission path between the contact system and the connector 4 is generated. When the breaker is switched from an opening state to a closing state, the operating mechanism rotates towards the closing direction, the operating mechanism or the contact system drives the driving mechanism to act, after the driving connector 4 is locked, the breaker is not closed at the moment, the operating mechanism continues to rotate, then the breaker is driven to be closed, the driving mechanism is still driven to act by the rotation of the operating mechanism at the moment, the elastic piece is compressed by the action of the driving mechanism, and the elastic piece passes through the first idle stroke. For example, an elastic member is arranged between the linkage mechanism 2 and the rotating mechanism 3, and the operating mechanism or the contact system drives the transmission mechanism 1 to move, so that the linkage mechanism 2 is driven to slide, the rotating mechanism 3 is driven to rotate, and the connector 4 is locked; at the moment, the circuit breaker is not switched on, the operating mechanism continues to rotate and then drives the circuit breaker to be switched on, meanwhile, the rotating of the operating mechanism still drives the transmission mechanism 1 to move and drives the linkage mechanism 2 to slide, the rotating mechanism 3 and the connector 4 are limited and fixed after the connector 4 is locked, and the linkage mechanism 2 compresses the elastic piece between the rotating mechanism 3 and passes through the first idle stroke.

As shown in fig. 1-2, a transmission mechanism 1 of the driving mechanism of the circuit breaker of the present embodiment is connected to a contact support 113, the contact support 113 is rotatably installed in a casing of the circuit breaker, and an operating mechanism drives the contact support 113 to rotate through a multi-link mechanism, so as to drive a moving contact to cooperate with a stationary contact; when the breaker is switched on and off, the driving mechanism is driven through the contact support 113. It is obvious that the drive can also be driven by an operating mechanism or a movable contact.

Specifically, the transmission mechanism 1 is rotatably connected with the contact support 113 through a support shaft 114, the contact support 113 includes a pivot portion 115 rotatably mounted on the circuit breaker, a first support hole 116 connected with the support shaft 114 is disposed on one side of the contact support 113 corresponding to the pivot portion 115, the transmission mechanism 1 includes two transmission rods 110 oppositely disposed at two ends of the contact support 113, second support holes 117 matched with the support shaft 114 are respectively disposed on the two transmission rods 110, the contact support 113 rotates to drive the transmission mechanism 1 to move through the support shaft 114, and the other ends of the two transmission rods 110 are respectively connected with two ends of the linkage rod 21. The linkage rod 21 is arranged in parallel with the axial direction of the contact support 113 at a distance.

The transmission mechanism 1 of the present embodiment is directly rotatably connected to the contact support 113 through the support shaft 114, and has the characteristics of simple structure and convenient assembly. It will be understood that the actuator 1 may also be connected to the contact support 113 by means of screws or the like, or that the actuator 1 is formed integrally directly from the contact support 113. Furthermore, the number of transmission levers 110 can also be adjusted, for example by adding a transmission lever 110 connected to the middle of the contact support 113, or by providing a transmission lever 110 on only one side. In addition, the transmission mechanism 1 can also be directly or indirectly connected with parts such as a multi-link mechanism of the operating mechanism and the like which have larger transverse displacement change along with the opening and closing actions, and the invention belongs to the protection scope of the invention. The transmission mechanism 1 is preferably driven by the contact support 113, and the connector 4 can also be unlocked when the moving contact is driven by the contact support 113 to open when the operating mechanism is tripped.

As an embodiment of an operating mechanism, the operating mechanism comprises a mechanism support, a rocker arm assembly, a trip device, a latch device, a re-latch device, a first connecting rod, a second connecting rod and a main tension spring, wherein the rocker arm assembly, the trip device, the latch device and the re-latch device are respectively and rotatably arranged on the mechanism support; the action process and the working principle of the operating mechanism are prior art and are not described herein. It should be noted that when the operating mechanism drives the circuit breaker to open and close, the driving mechanism may also be driven by other elements of the operating mechanism, such as the rocker arm assembly, the first link or the second link, to unlock or lock the connector 4.

As shown in fig. 6, the rotating mechanism 3 of the present embodiment includes two rocker arms 30 disposed oppositely, the two rocker arms 30 include a pivot arm 31 and a drive arm 33 respectively, and a connecting arm 32 connected between the pivot arm 31 and the drive arm 33, the pivot arms 31 of the two rocker arms 30 are connected with the connector 4 and disposed at two ends of the connector 4 oppositely, the drive arms 33 of the two rocker arms 30 are disposed at one side of the connector 4 and connected with the linkage mechanism 2 through a second rotating shaft 36, the pivot arm 31 is provided with a pivot hole 34 matching with the cross-sectional shape of the operating shaft 44 of the connector 4, the pivot hole 34 can be sleeved on the operating shaft 44 for limiting, and 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 may drive the connector 4 through only one rocker arm 30, and the balance of the two rocker arms 30 is better.

As shown in fig. 5, the linkage mechanism 2 of this embodiment includes a linkage rod 21, the linkage rod 21 is slidably disposed in the circuit breaker housing, a linkage hole 22 matched with the rotation shaft structure 20 is disposed in the linkage rod 21, the middle portion of the rotation shaft structure 20 is located in the linkage hole 22, two ends of the rotation shaft structure 20 respectively located outside the linkage rod 21 respectively form a transmission portion, the transmission portions are connected with a transmission rod 110 of the transmission mechanism 1, the transmission rod 110 drives the linkage rod 21 to move through the rotation shaft structure 20 when acting, and the linkage rod 21 drives the operation portion 23 and the guide mechanism thereon to move. Of course, the rotating shaft structure 20 may not be provided, and the linkage rod 21 may be directly provided with a transmission part.

The linkage mechanism 2 comprises two operation portions 23 which are oppositely arranged on two sides of the linkage rod 21, operation holes 24 are respectively formed in the two operation portions 23, a second rotating shaft 36 which penetrates through the operation holes 24 is arranged on a rocker arm 30 of the corresponding rotating mechanism 3, the size of each operation hole 24 is larger than that of the corresponding second rotating shaft 36, the corresponding second rotating shafts 36 can move in the operation holes 24, the hole walls of the operation portions 23 which penetrate through the operation holes 24 push the second rotating shafts 36 to drive the rocker arms 30 to rotate when moving, meanwhile, the rocker arms 30 drive the second rotating shafts 36 to move along the length direction of the operation holes 24, the radius difference generated when the rotating mechanism 3 rotates is avoided, and the connector 4 is driven to be locked and unlocked through the rocker arms 30. Of course, when the linkage mechanism 2 is not provided, the connection between the transmission rod 10 and the rotation mechanism 3 may be provided with a first avoidance hole, the rotation mechanism 3 is provided with a second rotating shaft 36 penetrating through the first avoidance hole, the size of the first avoidance hole is larger than that of the second rotating shaft 36, and the first avoidance hole can move in the operation hole 24 and is used for avoiding the radius difference generated when the rotation mechanism 3 rotates.

Of course, the operation hole 24 may also be a groove structure, that is, the side surface of one side of the operation hole 24 is closed, and the second rotating shaft 36 is inserted from the side surface of the other side, or one end of the operation hole 24 is opened, which can facilitate the installation of the second rotating shaft 36, but as long as the operation hole 24 is along the moving direction of the operation portion 23, two opposite side walls can push the second rotating shaft 36.

The linkage rod 21 is provided with a guide mechanism, the guide mechanism comprises two guide plates 271 which are oppositely arranged and a middle plate 272 which is connected between the tops of the two guide plates 271, rollers are arranged between the two guide plates 271, the two ends of each roller are respectively connected with the two guide plates 271 through guide shafts 274 in a rotating mode, the side faces of the rollers stretch out of the two guide plates 271 to be matched with the shell of the circuit breaker in a rolling mode, two sets of rollers are arranged on the two radial sides of the linkage rod 21 respectively, and the two sets of rollers on each side are arranged up and down respectively.

It will be appreciated that the number and location of the guide mechanisms may be adjusted, for example to reduce the number of guide mechanisms or to add guide mechanisms to other spaces of the linkage 21. In addition, the guide mechanism may be slidably engaged with the circuit breaker instead of the rolling, for example, a corresponding groove may be provided on the circuit breaker, and the guide mechanism is a boss slidably engaged in the groove, which all fall within the protection scope of the present invention.

Further, the upper side and the lower side of the linkage rod 21 are respectively provided with a fixing plate 28, the fixing plates 28 are respectively connected with the bottoms of the guide mechanism and the linkage mechanism 2, the guide mechanism and the linkage mechanism 2 are supported by the fixing plates 28, the strength of the guide mechanism and the linkage mechanism 2 can be ensured, the linkage rod 21 body does not need to be designed greatly, and the internal space of the plug-in circuit breaker can be effectively utilized for installation.

The specific opening process of this embodiment is:

in the first stage, the contact support 113 rotates clockwise to drive the moving contact to leave the fixed contact, and simultaneously the contact support 113 drives the transmission rod 110 to pass through the second idle stroke 112, i.e., the transmission rod 110 is driven 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 is close to the rotating shaft structure 20, before the left hole wall 1111 contacts the rotating shaft structure 20, the linkage mechanism 2, the rotating mechanism 3 and the opening mechanism do not move, the connector 4 does not loosen the external conductive member, until the contact support 113 drives the moving contact to leave the fixed contact for a certain distance, and the circuit breaker is opened to disconnect the circuit;

in the second stage, the contact support 113 continues to rotate, when the left hole wall 1111 contacts with the rotating shaft structure 20, the rotating shaft structure 20 continues 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 the two sides to swing towards one side of the contact support 113, the rotating mechanisms 3 drive the cam shaft 43 of the opening mechanism to rotate, the long diameter portion 45 of the cam shaft 43 rotates through the first idle stroke and then contacts with the conductive structure 41, the conductive structure 41 is opened to release the external conductive piece, and therefore unlocking of the connector is achieved.

The specific closing process of this embodiment is:

in the first stage, the contact support 113 rotates counterclockwise to drive the moving contact to move close to the fixed contact, and at the same time, the contact support 113 drives the transmission rod 110 to pass through the second idle stroke 112, i.e., 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 is close to the rotating shaft structure 20 until the right hole wall 1112 contacts the rotating shaft structure 20, in which process the rotating shaft structure 20 and the opening mechanism do not move;

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 in a direction away from the contact support 113, and simultaneously drives the rotating mechanisms 3 on both sides to swing towards a side away from the contact support 113, so that the rotating mechanism 3 drives the cam shaft 43 of the opening mechanism to rotate, the long diameter part 45 of the cam shaft 43 is separated from the conductive structure 41, the conductive piece is clamped under the driving of the elastic clamping mechanism, the locking of the connector is realized, and at this time, the movable contact and the fixed contact are not switched on;

in the third stage, the contact support 113 continues to rotate, the right hole wall 1112 continues to push the rotating shaft structure 20, the camshaft 43 continues to rotate by a predetermined angle under the driving of the linkage mechanism 2 through the first idle stroke, the long diameter portion 45 further moves away from the conductive structure 41, the contact support 113 drives the moving contact to contact with the fixed contact, and the switch-on is in place.

The operating mechanism is in the prior art, and comprises an operating mechanism bracket, a rocker arm assembly, a locking piece, a tripping piece, a re-buckling piece, a crank and a connecting rod, wherein the rocker arm assembly, the locking piece, the tripping piece and the re-buckling piece are respectively and rotatably arranged on the operating mechanism bracket; the lock catch piece is matched with the jump buckle piece in a lock catch mode, the fastener is matched with the lock catch piece in a limiting mode, the crank is connected with the jump buckle piece in a rotating mode, one end of the connecting rod is connected with the crank in a rotating mode, and the other end of the connecting rod is connected with a moving contact mechanism of the circuit breaker in a driving mode. The driving mechanism of this embodiment may be matched with the driving mechanism, and may also be matched with a rocker arm assembly, a crank or a connecting rod of an operating mechanism, or a contact support and a moving contact of a contact system.

The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the inventive concept, and all should be considered as falling within the protection scope of the invention.

Claims (10)

1. The utility model provides a circuit breaker, is including setting up operating device, contact system and connector (4) in the circuit breaker casing, and the contact system passes through connector (4) and is connected with electrically conductive, and connector (4) are equipped with the clamp end that presss from both sides tightly electrically conductive, its characterized in that: the circuit breaker is characterized by further comprising a driving mechanism, the driving mechanism 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 (4) to be unlocked through the driving mechanism, clamping on the conductive piece is relieved, and when the circuit breaker is closed, the operating mechanism or the contact system drives the connector (4) to be locked through the driving mechanism, and the conductive piece is clamped.

2. The circuit breaker of claim 1, wherein: a delay idle stroke is arranged on a transmission path between the operating mechanism or the contact system and the connector (4), the delay idle stroke comprises a first idle stroke, when the breaker is switched from a closing state to an opening state, the operating mechanism moves towards the opening direction to drive the contact system to open, and after the breaker passes through the first idle stroke, the operating mechanism or the contact system drives the connector to unlock, so that the contact system is opened firstly, and the connector is unlocked secondly;

when the breaker is switched from an opening state to a closing state, the operating mechanism rotates towards a closing direction, the operating mechanism or the contact system drives the connector (4) to be locked firstly, the operating mechanism continues to move, the contact system is driven to be closed, and meanwhile, the circuit breaker passes through a first idle stroke.

3. The circuit breaker of claim 2, wherein: the delay idle stroke also comprises a second idle stroke (112), when the breaker is switched from a switching-on state to a switching-off state, the operating mechanism rotates towards the switching-off direction to drive the contact system to be switched off, and after the second idle stroke (112) and the first idle stroke, the operating mechanism or the contact system drives the connector to be unlocked, so that the contact system is switched off firstly, and the connector is unlocked secondly;

when the breaker is switched from an opening state to a closing state, the operating mechanism rotates towards the closing direction, after the second idle stroke (112) is passed, the operating mechanism or the contact system drives the connector (4) to be locked, the operating mechanism continues to rotate, so that the contact system is closed, and meanwhile, the first idle stroke is passed.

4. The circuit breaker according to claim 2 or 3, characterized in that: the first idle stroke is formed between the first transmission structure and the second transmission structure which are in transmission fit, and when the circuit breaker is switched from a switching-on state to a switching-off state, the first transmission structure is driven to pass through the first idle stroke and then to be in contact with the second transmission structure to drive the second transmission structure to move or rotate so as to unlock the connector; when the circuit breaker is switched from an opening state to a closing state, the first transmission structure is driven to drive the second transmission structure to move or rotate so that the connector is locked, the operating mechanism continues to move, and when the contact system is closed, the first transmission structure and the second transmission structure are driven to be separated and pass through a first idle stroke.

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

6. The circuit breaker of claim 2, wherein: the time-delay idle stroke is arranged at the transmission position of the driving mechanism and the operating mechanism or the contact system, or the transmission position of the driving mechanism and the connector (4), or between the transmission elements of the driving mechanism, or between the transmission elements in the connector (4).

7. The circuit breaker of claim 2, wherein: the connector (4) comprises two groups of conductive structures (41) which are oppositely arranged; elastic clamping mechanisms for driving the two groups of conductive structures (41) to approach each other are respectively arranged on the outer sides of the two groups of conductive structures (41), a cam shaft (43) and operating shafts (44) respectively arranged at two ends of the axis of the cam shaft (43) are arranged between the two groups of conductive structures (41), the cam shaft (43) comprises a long-diameter part (45) and a short-diameter part (46), two ends of the long-diameter part (45) can respectively prop open the two groups of conductive structures (41), and the short-diameter part (46) is used for avoiding the two groups of conductive structures (41); the cam shaft (43) rotates to jack the two groups of conductive structures (41) to unlock the connector (4) when the long diameter part (45) corresponds to the two groups of conductive structures (41), and the elastic clamping mechanism drives the two groups of conductive structures (41) to be close to the locking connector (4) when the short diameter part (46) corresponds to the two groups of conductive structures (41).

8. The circuit breaker of claim 7, wherein: after the long diameter part (45) is separated from the two groups of conductive structures (41), the cam shaft (43) can continuously rotate to drive the long diameter part (45) to be far away from the conductive structures (41) to form a first idle stroke, and after the operating mechanism or the contact system drives the cam shaft (43) to rotate through the driving mechanism to enable the connector (4) to be locked, the operating mechanism continuously rotates to drive the breaker to be switched on and simultaneously drives the cam shaft (43) to continuously rotate through the first idle stroke through the driving mechanism.

9. The circuit breaker of claim 3, wherein: the second idle stroke (112) is a sliding idle stroke or a rotating idle stroke.

10. The circuit breaker of claim 9, wherein: second idle stroke (112) are including poroid structure and card fender structure, the card keeps off the structure and is in slide or rotate in the poroid structure, poroid structure include with two at least lateral walls of card fender structure complex, the card keep off the structure with two at least lateral walls between have a clearance, the card keep off the structure and remove the process the clearance after with two at least lateral wall drive coordination.

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