CN216054517U - Circuit breaker - Google Patents

Abstract

The application provides a circuit breaker relates to low-voltage apparatus technical field, includes: the accessory casing of cuboid structure and the circuit breaker casing of cuboid structure set up accessory casing and circuit breaker casing side by side along width direction, when can making full use of the degree of depth of quick-witted case of circuit breaker casing, effectively reduce direction of height's size for the circuit breaker can satisfy the service environment who has the requirement to the mounting height. Utilize the form that first connecting wire and second connecting wire directly pass the lateral wall of circuit breaker casing and annex casing, make first connecting wire and second connecting wire can wear to locate the mutual-inductor in the annex casing, realize the safe dropout function of release in the annex casing, and simultaneously, directly set up binding post in the annex casing, make the output wiring function of circuit breaker directly realize through the binding post in the annex casing, avoid all being provided with binding post in circuit breaker casing and annex casing and lead to the circuit breaker to work a telephone switchboard a lot, complicated problem.

Description

Circuit breaker

Technical Field

The application relates to the technical field of low-voltage electrical appliances, in particular to a circuit breaker.

Background

With the rapid development of economy, the living standard of people is rapidly improved, and the safety of household electricity utilization is required to be higher. The circuit breaker may be installed in a terminal distribution line. Meanwhile, the circuit can be connected, carried and disconnected under the condition of normal or abnormal circuit, and the circuit and the electrical equipment are effectively protected. In order to improve the safety of the circuit breaker, an accessory of the earth leakage protection function is generally provided on the circuit breaker body.

Current circuit breaker and annex are subject to that internal mechanism is the type casing of dogbone usually, and the high great of type casing of dogbone is difficult to adapt to the installation service environment that has the requirement to the height-size, and simultaneously, current circuit breaker and annex all are provided with binding post, lead to the wiring quantity of circuit breaker more.

SUMMERY OF THE UTILITY MODEL

An object of this application lies in, to the not enough among the above-mentioned prior art, provides a circuit breaker to improve the problem that current circuit breaker wiring quantity is more, more complicated.

In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

in one aspect of the embodiments of the present application, a circuit breaker is provided, including: the circuit breaker comprises an accessory shell with a cuboid structure and a circuit breaker shell with a cuboid structure, wherein the accessory shell and the circuit breaker shell are arranged in parallel along the width direction; an input terminal, a through terminal, an operating mechanism, a moving contact and a static contact are arranged in a shell of the circuit breaker, the input terminal is connected with the moving contact, the operating mechanism is in driving connection with the moving contact, and the operating mechanism drives the moving contact and the static contact to switch on or switch off; the accessory shell is internally provided with a mutual inductor, a wiring terminal and a release, the release is in driving connection with the operating mechanism, one end of a first connecting wire is connected with a fixed contact, the other end of the first connecting wire penetrates through the mutual inductor and is connected with the wiring terminal, one end of a second connecting wire is connected with the wiring terminal, the other end of the second connecting wire penetrates through the mutual inductor and is connected with a through terminal, the mutual inductor is used for collecting current signals of the first connecting wire and the second connecting wire, the mutual inductor is in signal connection with the release, and the release is used for driving the operating mechanism to be opened according to the current signals.

Optionally, a transmission member is further disposed in the accessory housing, the transmission member is in driving connection with the operating mechanism, and an action end of the release corresponds to the transmission member and is used for driving the transmission member to move according to the current signal so as to drive the operating mechanism to open the brake.

Optionally, the accessory further comprises a reset mechanism arranged on the accessory shell, wherein the transmission part is provided with a buckling part, and the reset mechanism is driven to store energy and reset so as to abut against the buckling part at a first abutting position; the tripper drives the transmission piece to move so as to release the butting of the buckling part and the reset mechanism at the first butting position, so that the reset mechanism releases energy and is butted with the buckling part at the second butting position to limit the switching-on of the operating mechanism.

Optionally, the reset mechanism includes a reset portion, the reset portion includes a first mating wall and a second mating wall, the fastening portion includes a fastening wall and a locking wall, the reset portion is abutted at the first abutting position by the fastening wall of the first mating wall and the fastening portion, and the reset portion is abutted at the second abutting position by the locking wall of the second mating wall and the fastening portion.

Optionally, the device further comprises a first elastic element, wherein the first elastic element is connected with the transmission element and is used for providing a resetting force for the transmission element; the reset mechanism comprises a reset button and a second elastic piece, the second elastic piece is connected with the reset button, and the reset button is driven to reset and drives the second elastic piece to store energy.

Optionally, the transmission part comprises a transmission part and a driving part, the transmission part is in driving connection with the operating mechanism through the transmission part, and the action end of the tripper corresponds to the driving part so that the tripper drives the driving part to drive the transmission part to move and the transmission part drives the operating mechanism to open the brake through the transmission part.

Optionally, a circuit board is further arranged in the accessory shell, the circuit board is in signal connection with the mutual inductor and the release respectively, and the circuit board is used for controlling the release to drive the operating mechanism to open according to the current signal.

Optionally, the connection terminal includes a first connection board connected to the first connection line and a second connection board connected to the second connection line, and the circuit board is connected to the first connection board and the second connection board, respectively.

Optionally, a test button, a first contact element and a second contact element are further arranged in the accessory shell, the first contact element and the second contact element are respectively in signal connection with the circuit board, the test button drives the first contact element to be in contact with the second contact element so as to send an analog current signal to the circuit board, and the circuit board is used for controlling the release to drive the operating mechanism to open according to the analog current signal.

Optionally, the test device further comprises a third elastic member connected with the test button, the third elastic member is used for providing a reset force for the test button, and the first contact member is a spring contact member.

Optionally, the tripper is including moving the quiet iron core that iron core and cover were located and move the iron core periphery, moves the iron core and can slide along the dropout direction relatively quiet iron core and divide the floodgate with drive operating device, and the internal perisporium of quiet iron core is fitted with a contraceptive ring and is equipped with the inner cone wall, moving the periphery wall of iron core fit with a contraceptive ring and be equipped with inner cone wall complex outer cone wall, quiet iron core is used for moving the iron core when sliding along the dropout direction, and is spacing to moving the iron core through inner cone wall and outer cone wall butt.

Optionally, an instantaneous release is further arranged in the circuit breaker shell, the first connecting line is wound on the periphery of the instantaneous release, and an acting end of the instantaneous release corresponds to the operating mechanism and is used for controlling the opening of the operating mechanism according to the current of the first connecting line.

The beneficial effect of this application includes:

the application provides a circuit breaker, include: the accessory casing of cuboid structure and the circuit breaker casing of cuboid structure set up accessory casing and circuit breaker casing side by side along width direction for accessory casing and circuit breaker casing constitute wholly, from this, when the circuit breaker is pegged graft in quick-witted case along length direction, can make the circuit breaker casing make full use of the degree of depth of quick-witted case in, effectively reduce direction of height's size, make the circuit breaker can satisfy the service environment who has the requirement to the mounting height. An input terminal, a through terminal, an operating mechanism, a moving contact and a static contact are arranged in a shell of the circuit breaker, the input terminal is connected with the moving contact, the operating mechanism is in driving connection with the moving contact, and the operating mechanism drives the moving contact and the static contact to switch on or switch off; the accessory shell is internally provided with a mutual inductor, a wiring terminal and a release, the release is in driving connection with the operating mechanism, one end of a first connecting wire is connected with a fixed contact, the other end of the first connecting wire penetrates through the mutual inductor and is connected with the wiring terminal, one end of a second connecting wire is connected with the wiring terminal, the other end of the second connecting wire penetrates through the mutual inductor and is connected with a through terminal, the mutual inductor is used for collecting current signals of the first connecting wire and the second connecting wire, the mutual inductor is in signal connection with the release, and the release is used for driving the operating mechanism to be opened according to the current signals. When setting up L looks return circuit and N looks return circuit, utilize the form that first connecting wire and second connecting wire directly pass the lateral wall of circuit breaker casing and annex casing, make first connecting wire and second connecting wire can wear to locate the mutual-inductor in the annex casing, realize the safety dropout function of tripper in the annex casing, and simultaneously, directly set up binding post in the annex casing, make the output wiring function of circuit breaker directly realize through the binding post in the annex casing, avoid all being provided with binding post in circuit breaker casing and annex casing and lead to the circuit breaker to work a telephone switchboard a lot, complicated problem.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is an isometric view of a circuit breaker according to an embodiment of the present disclosure;

fig. 2 is a front view of a circuit breaker according to an embodiment of the present disclosure;

fig. 3 is a second perspective view of a circuit breaker according to an embodiment of the present disclosure;

fig. 4 is a schematic internal structural diagram of a circuit breaker according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram of L-phase and N-phase loops of a circuit breaker according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of an L-phase circuit of a circuit breaker according to an embodiment of the present disclosure;

fig. 7 is a schematic diagram of an N-phase circuit of a circuit breaker according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram of a fault-free state of closing a circuit breaker according to an embodiment of the present application;

fig. 9 is a schematic diagram illustrating a tripping state of a circuit breaker according to an embodiment of the present disclosure;

fig. 10 is a second schematic diagram illustrating a tripping state of a circuit breaker according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a transmission member of a circuit breaker according to an embodiment of the present disclosure;

fig. 12 is a schematic structural view of a latch of a circuit breaker according to an embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of a reset button of a circuit breaker according to an embodiment of the present disclosure;

fig. 14 is a schematic structural diagram of an accessory housing of a circuit breaker according to an embodiment of the present disclosure;

fig. 15 is a second schematic structural diagram of an accessory housing of a circuit breaker according to an embodiment of the present disclosure;

fig. 16 is a third schematic structural diagram of an accessory housing of a circuit breaker according to an embodiment of the present disclosure;

fig. 17 is a fourth schematic structural diagram of an accessory housing of a circuit breaker according to an embodiment of the present disclosure;

fig. 18 is a schematic structural diagram of a circuit board of a circuit breaker provided in the embodiment of the present application for taking electricity;

fig. 19 is a schematic structural diagram of a trip unit in an accessory housing of a circuit breaker according to an embodiment of the present disclosure;

fig. 20 is a second schematic structural diagram of a trip unit in an accessory housing of a circuit breaker according to an embodiment of the present disclosure;

fig. 21 is a schematic structural diagram of a stationary core of a circuit breaker according to an embodiment of the present disclosure;

fig. 22 is a schematic structural diagram of a movable iron core of a circuit breaker according to an embodiment of the present disclosure;

fig. 23 is a schematic structural diagram of a circuit breaker housing of a circuit breaker according to an embodiment of the present application.

Icon: 100-a circuit breaker housing; 110-operating buttons; 131-an input terminal; 132-through terminal; 140-a handle; 150-jump fasteners; 160-a catch member; 161-a first trip portion; 162-a second release; 163-third release; 170-thermal release; 180-moving contact; 190-fixed contact; 210-instantaneous release; 211-second ejector pin; 220-a connecting rod; 230-an arc extinguishing chamber; 240-spring; 500-an accessory housing; 510-a reset mechanism; 511-a reset section; 512-a first mating wall; 513 — a second mating wall; 514-a transition wall; 520-a connecting terminal; 523-first patch panel; 524 — a second patch panel; 541-a first connection line; 542-second connecting line; 543-a third connecting line; 550-a transformer; 560-a release; 561-first top bar; 562-a movable iron core; 563-stationary core; 564-a magnetic yoke; 565-coil; 566-a fourth elastic member; 567-inner conical wall; 568-outer conical wall; 570-a circuit board; 571-a power taking clamp; 580-a transmission member; 581-a driving part; 582-a transmission; 583-a snap-fit; 5831-a snap wall; 5832-a locking wall; 590-reset button; 610-test button; 611-a third elastic member; 621-a first contact; 622-second contact.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like are only for convenience of describing the present application and simplifying the description, and thus, cannot be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In one aspect of the embodiments of the present application, as shown in fig. 1 and 2, there is provided a circuit breaker including: the accessory case 500 of the rectangular parallelepiped structure and the breaker case 100 of the rectangular parallelepiped structure utilize the linkage of the release 560 and the operating mechanism in the breaker case 100 by providing the releases 560 of different types in the accessory case 500, thereby improving the safety of the breaker. Set up annex casing 500 and circuit breaker casing 100 side by side along width direction for annex casing 500 and circuit breaker casing 100 constitute wholly, from this, when the circuit breaker is pegged graft in quick-witted case along length direction, can make full use of the degree of depth of quick-witted case of circuit breaker casing 100 in, effectively reduce the size of direction of height, make the circuit breaker can satisfy the service environment who has the requirement to the mounting height. The accessory case 500 and the circuit breaker case 100 may be integrally formed, or may be separately formed and then detachably connected.

As shown in fig. 3, fig. 4 and fig. 23, an input terminal 131, a through terminal 132, an operating mechanism, a movable contact 180 and a fixed contact 190 are disposed in the circuit breaker housing 100, the input terminal 131 is connected to the movable contact 180, and the operating mechanism is drivingly connected to the movable contact 180. In some embodiments, the operating mechanism, the moving contact 180 and the input terminal 131 are sequentially arranged along the length direction of the circuit breaker housing 100, the fixed contact 190 and the moving contact 180 are arranged along the height direction, and the input terminal 131 and the through terminal 132 are arranged along the height direction, so that the circuit breaker housing 100 with a cuboid structure can be effectively engaged, and the setting requirement of the circuit breaker housing 100 with the cuboid structure is met. When the operating mechanism is driven by external force, the moving contact 180 and the fixed contact 190 can be driven to be switched on, or the moving contact 180 and the fixed contact 190 are driven to be switched off, and multiple on-off of the circuit breaker can be realized by circulating the on-off operation.

Referring to fig. 1, 4 and 14, a transformer 550, a connection terminal 520 and a release 560 are disposed in the accessory housing 500, the release 560 is drivingly connected to the operating mechanism, as shown in fig. 5, one end of a first connection line 541 is connected to the fixed contact 190, the other end of the first connection line 541 is connected to the connection terminal 520 after passing through the transformer 550, one end of a second connection line 542 is connected to the connection terminal 520, the other end of the second connection line 542 is connected to the through terminal 132 after passing through the transformer 550, the input terminal 131 is connected to the movable contact 180 through a third connection line 543, so as to form an L-phase loop and an N-phase loop in fig. 5, a direction of a dotted arrow in fig. 5 indicates a current direction, wherein, as shown in fig. 6, the L-phase loop includes a current flowing direction from the input terminal 131 to the third connection line 543 to the movable contact 180 to the fixed contact 190 to the first connection line 541 to the connection terminal 520, as shown in fig. 7, the N-phase loop includes a current flow direction along the connection terminal 520 to the second connection line 542 to the through terminal 132.

As shown in fig. 4, since the first connection line 541 and the second connection line 542 both pass through the transformer 550, the transformer 550 can collect current signals on the first connection line 541 and the second connection line 542, and signal-connect the transformer 550 and the release 560, so that when the current signals meet the opening requirement, the release 560 can be controlled to operate by the current signals, and the release 560 drives the operating mechanism to open, thereby effectively improving the safety of the circuit breaker. It should be noted that the drive connection in this application may be a constantly maintained drive connection, or may be a drive connection established only when needed (specific state, specific position).

When setting up L looks return circuit and N looks return circuit, utilize the form that first connecting wire 541 and second connecting wire 542 directly pass the lateral wall of circuit breaker casing 100 and annex casing 500, make first connecting wire 541 and second connecting wire 542 can wear to locate the mutual-inductor 550 in annex casing 500, realize the safety trip function of tripper 560 in the annex casing 500, simultaneously, directly set up binding post 520 in annex casing 500, make the output wiring function of circuit breaker directly realize through binding post 520 in the annex casing 500, avoid all being provided with binding post 520 in circuit breaker casing 100 and annex casing 500 and lead to the circuit breaker to work a telephone switchboard various, complicated problem.

The release 560 may be a leakage release 560, that is, when a leakage current occurs at a load end connected to the circuit breaker, the transformer 550 correspondingly generates a trigger current signal, so that the leakage release 560 operates to drive the operating mechanism to open the circuit. In some embodiments, whether the transformer 550 outputs the trigger current signal may be determined by that when there is no leakage fault at the load side, that is, when there is no leakage current, the vector sum of the first connection line 541 and the second connection line 542 passing through the transformer 550 is 0, and the output of the transformer 550 is also 0; when the load end has a leakage fault, the vector sum of the first connection line 541 and the second connection line 542 passing through the transformer 550 is not 0, and the output of the transformer 550 is not 0 at this time, so that a trigger current signal can be output, the leakage release 560 operates, and the operating mechanism is driven to open.

Optionally, as shown in fig. 4 and 8, a transmission member 580 is further disposed in the accessory housing 500, the transmission member 580 is in driving connection with the operating mechanism, and by corresponding the action end of the trip unit 560 in the accessory housing 500 to the transmission member 580, that is, in some embodiments, the first push rod 561 of the trip unit 560 in the accessory housing 500 corresponds to the transmission member 580 in position, it is achieved that the transmission member 580 can be driven to move by the action end or the first push rod 561 when the trip unit 560 operates, so as to drive the operating mechanism to open, thereby facilitating improvement of flexibility of layout and stability of transmission.

As shown in fig. 8, the transmission member 580 may be rotatably disposed on the accessory housing 500 (in other embodiments, the transmission member 580 may also be slidably disposed on the accessory housing 500), the trip unit 560 may be fixedly disposed on the accessory housing 500, the operating mechanism includes the handle 140, the locking member 160 and the trip member 150, wherein the handle 140 is in driving connection with the locking member 160, the locking member 160 and the trip member 150 are both in an abutting state (as a whole) during and during a closing state, the movable contact 180 is disposed on the locking member 160, such that when the handle 140 is moved towards the closing direction by an external force, the locking member 160 and the trip member 150 are driven to move together towards the closing direction, so that the movable contact 180 is moved towards the closing direction, when the closing is in place, the operating mechanism is in the closing state shown in fig. 8, in this state, the locking member 160 and the trip member 150 are still in the abutting state, the whole operating mechanism is in a stable state, and the circuit breaker can be normally electrified.

As shown in fig. 9, when the load has an electrical leakage fault, the transformer 550 generates a trigger current signal, the release 560 operates to drive the transmission member 580 to rotate in a counterclockwise direction, and the transmission member 580 drives the locking member 160 to move toward the opening direction while rotating until the locking member 160 and the tripping member 150 are separated, that is, the locking member 160 and the tripping member 150 are released from the abutting state, the locking member 160 is in the releasing position (the transmission member 580 is also in the releasing position), at this time, the stable state of the operating mechanism is broken, and under the action of the spring 240, the operating mechanism is pulled to open the circuit breaker, so that the circuit breaker completes the opening. Therefore, the breaker is switched off under the condition of leakage fault.

Alternatively, as shown in fig. 23, when the instantaneous release 210 is further disposed in the circuit breaker housing 100, the other end of the first connection line 541 is wound around the periphery of the instantaneous release 210 before the mutual inductor 550 penetrating the accessory housing 500, and the action end of the instantaneous release 210 corresponds to the operating mechanism (in some embodiments, the second push rod 211 of the instantaneous release 210 corresponds to the operating mechanism). As shown in fig. 10, if there is a high current on the first connection line 541, a strong magnetic field can be generated around the first connection line 541 located at the periphery of the instantaneous release 210 to drive the second ejector 211 in the instantaneous release 210 to move, so as to drive the locking element 160 to move toward the opening direction until the locking element 160 and the tripping element 150 are separated, that is, the locking element 160 and the tripping element 150 are in a release position (the transmission element 580 is also in the release position), at this time, the stable state of the operating mechanism is broken, and under the action of the elastic spring 240, the operating mechanism is pulled to open, so that the circuit breaker completes opening. Therefore, the breaker is opened under the condition of high-power current fault.

Optionally, as shown in fig. 14, the accessory device further includes a reset mechanism 510 disposed on the accessory housing 500, and a fastening portion 583 is disposed on the transmission member 580. As shown in fig. 16, the transmission member 580 and the reset mechanism 510 are in the release position, the transmission mechanism and the reset mechanism 510 abut against each other in the second abutting position, at this time, the reset mechanism 510 can be driven by external force to move from the release position to the initial position, that is, the reset mechanism 510 resets, energy is stored together with the reset mechanism 510 resetting, and since the reset mechanism 510 disengages from the second abutting position, the transmission member 580 also moves from the release position to the initial position before being driven by the release 560, and the reset of the transmission member 580 is completed. As shown in fig. 15, the reset mechanism 510 and the transmission member 580 are in the reset initial positions, and the latch portion 583 of the reset transmission member 580 and the reset mechanism 510 are in an abutting relationship at the first abutting position, so that the reset mechanism 510 maintains the energy storage state.

As shown in fig. 16, when the release 560 in the accessory housing 500 operates, the driving member 580 is driven to rotate counterclockwise, and at this time, the buckling portion 583 moves away from the first abutting position to the tripping position with the rotation of the driving member 580 (at the same time, the locking member 160 is driven to the tripping position by the driving member 580, so that the operating mechanism is switched off), thereby releasing the abutting relationship between the buckling portion 583 and the resetting mechanism 510 at the first abutting position, at this time, the resetting mechanism 510 is released and moves from the initial position to the tripping position, when both the buckling portion 583 and the resetting mechanism 510 are located at the tripping position, the buckling portion 583 and the resetting mechanism 510 establish the abutting relationship at the second abutting position, so that, when the resetting mechanism 510 is not reset, the resetting portion 583 can be limited to reset, the switching-on driving member 580 at the tripping position abuts against the operating mechanism moving in the direction, so that the switching on the operating mechanism fails, therefore, potential safety hazards caused by false switching-on under the condition that the fault is not relieved are avoided.

After the failure is relieved, the reset mechanism 510 can be driven by external force to move from the tripping position to the initial position, the transmission piece 580 also moves from the tripping position to the initial position, so that the reset mechanism 510 and the transmission piece 580 recover the initial positions, and at this time, the buckling parts 583 of the reset mechanism 510 and the transmission piece 580 are abutted at the first abutting position.

In some embodiments, as shown in fig. 14, the reset mechanism 510 may be slidably disposed in the housing, and the transmission member 580 may be rotatably disposed in the housing; in some embodiments, the reset mechanism 510 may also be rotatably disposed in the housing, and the transmission member 580 is slidably disposed in the housing.

Optionally, the reset mechanism 510 includes a reset button 590 and a second elastic member, the second elastic member is connected to the reset button 590, and the second elastic member provides a force to the reset button 590 to move the reset button toward the release position; the first elastic member is connected with the transmission member 580, and the first elastic member provides an acting force for the transmission member 580 to move towards the initial position, so that when the reset button 590 is driven by an external force to move from the trip position to the initial position, the reset button 590 drives the second elastic member to store energy, and along with the movement of the reset button 590 towards the initial position, the second elastic member can be separated from the second abutting position, so that the abutting relation with the transmission member 580 at the second abutting position is released, and then the transmission member 580 drives the transmission member 580 to move from the trip position to the initial position under the acting force of the first elastic member, so as to complete the resetting of the reset button 590 and the transmission member 580. As shown in fig. 15, the latch portion 583 of the reset transmission member 580 and the reset button 590 form an abutting relationship at the first abutting position, so that the second elastic member maintains the energy storage state. As shown in fig. 16, when the release 560 in the accessory housing 500 operates, the driving member 580 is driven to move from the initial position to the release position, and the engagement relationship between the engaging portion 583 and the reset button 590 at the first engagement position is released (at the same time, the locking member 160 is driven to the release position by the driving member 580, so that the operating mechanism is opened), and at this time, the reset button 590 moves from the initial position to the release position under the action of the second elastic member, and when the engaging portion 583 and the reset mechanism 510 are both located at the release position, the engaging portion 583 and the reset mechanism 510 establish the engagement relationship at the second engagement position, and at this time, the first elastic member maintains the energy storage state.

Alternatively, as shown in fig. 15 and 16, the reset mechanism 510 includes a reset portion 511, the reset portion 511 may be disposed on the reset button 590, as shown in fig. 13, the reset portion 511 includes a first mating wall 512 and a second mating wall 513, as shown in fig. 11, and the latch portion 583 includes a latch wall 5831 and a locking wall 5832. As shown in fig. 15, when the return mechanism 510 and the driver 580 are in contact at the first contact position, the return portion 511 is in contact with the engaging wall 5831 of the engaging portion 583 via the first engaging wall 512; as shown in fig. 16, when the reset mechanism 510 and the driver 580 are in contact at the second contact position, the reset portion 511 is in contact with the lock wall 5832 of the hook portion 583 via the second engagement wall 513. In some embodiments, the first mating wall 512 and the second mating wall 513 may be disposed at an angle, and the first mating wall 512 and the second mating wall 513 may be directly connected or connected through a transition wall 514 as shown in fig. 13. As shown in fig. 11, the fastening wall 5831 and the locking wall 5832 may be disposed at an angle, and the fastening wall 5831 and the locking wall 5832 may be directly connected as shown in fig. 11, or may be connected via an intermediate wall.

Optionally, as shown in fig. 11, the transmission member 580 further includes a transmission portion 582 and a driving portion 581, and the transmission portion 582, the driving portion 581 and the buckling portion 583 may be disposed on the transmission member 580, so that the transmission member 580 abuts against the reset mechanism 510 at the first abutting position or at the second abutting position through the buckling portion 583, is drivingly connected to the operating mechanism through the transmission portion 582, and is drivingly connected to the release 560 through the driving portion 581. When the transmission member 580 is drivingly connected to the trip unit 560 through the driving portion 581, an action end (a first ejector 561) of the trip unit 560 may be made to correspond to the driving portion 581, so that when the transformer 550 sends a trigger current signal, the first ejector 561 of the trip unit 560 drives the driving portion 581 to drive the transmission member 580 to move, so that the transmission member 580 drives the locking member 160 of the operating mechanism to move toward the trip position through the transmission portion 582, thereby completing the opening of the circuit breaker. As shown in fig. 12, the locking member 160 is provided with a first trip portion 161, a second trip portion 162 and a third trip portion 163, wherein the first trip portion 161 is drivingly connected to the transmission portion 582 of the transmission member 580, the second trip portion 162 is drivingly connected to the second top bar 211 of the instantaneous release 210, and the third trip portion 163 is drivingly connected to the thermal release 170 in the circuit breaker housing 100. When the transmission portion 582, the second carrier bar 211 and the thermal release 170 respectively drive the locking member 160 during the releasing operation, the moving directions of the locking member 160 should be consistent, so that the mutual interference can be avoided.

As shown in fig. 23, the operating mechanism may further include an operating button 110 and a connecting rod 220, the operating button 110 is slidably disposed in the circuit breaker housing 100, the operating button 110 is rotatably connected to the handle 140 through the connecting rod 220, the handle 140 is rotatably connected to the trip member 150 through the connecting rod 220, the trip member 150 abuts against the locking member 160, and the locking member 160 is rotatably connected to the movable contact 180. During closing, the operating button 110 is driven by external force to move towards the closing direction, the connecting rod 220 drives the handle 140 to rotate in the counterclockwise direction, and the handle 140 drives the trip unit 150 (i.e. the whole formed by the trip unit 150, the locking unit 160 and the movable contact 180) to rotate clockwise through the connecting rod 220, i.e. to move towards the closing direction, so that closing of the circuit breaker is completed. The elastic spring 240 is connected with the moving contact 180, and in the switching-on process, the elastic spring 240 provides the switching-off acting force before the moving contact 180 exceeds the travel, and provides the switching-on acting force after the moving contact 180 exceeds the travel, and in addition, when the locking piece 160 is located at the tripping position, the elastic spring 240 provides the switching-off acting force for the moving contact 180.

The thermal release 170 is further disposed in the circuit breaker housing 100, the thermal release 170 is connected to the third trip portion 163 of the locking member 160 through a linkage, and when the thermal release 170 is overheated, the linkage 220 pulls the locking member 160 to move toward a trip position, thereby completing the opening of the circuit breaker. An arc extinguishing chamber 230 is further disposed in the circuit breaker housing 100, and the arc extinguishing chamber 230 is disposed corresponding to the moving contact 180 and the stationary contact 190, so that when an arc is generated between the moving contact 180 and the stationary contact 190, the arc can be quickly extinguished through the arc extinguishing chamber 230.

Optionally, as shown in fig. 4 and fig. 14, a circuit board 570 is further disposed in the accessory housing 500, the circuit board 570 is in signal connection with the transformer 550 and the release 560 respectively, a controller may be disposed on the circuit board 570, the transformer 550 collects a current signal and sends the current signal to the controller of the circuit board 570, the controller controls whether the release 560 is powered on, when the transformer 550 sends a trigger current signal, the controller controls the release 560 to be powered on, and at this time, the release 560 generates a magnetic field, so that the first ejector 561 extends out to push the transmission member 580 to move, so that the operating mechanism corresponds to the opening. In addition, when the controller monitors that the leakage current transmitted by the transformer 550 is greater than a certain threshold, the controller drives the release 560 to be powered on to drive the operating mechanism to open, and when the leakage current is less than the threshold, the controller does not drive the leakage release 560 to be powered on, so that misoperation of the controller is avoided.

Optionally, as shown in fig. 18, the connection terminal 520 includes a first connection board 523 connected to the first connection line 541 and a second connection board 524 connected to the second connection line 542, the circuit board 570 is respectively connected to the first connection board 523 and the second connection board 524, and specifically, the circuit board 570 may be respectively connected to the first connection board 523 and the second connection board 524 through a power-taking clip 571, so as to complete power taking of the circuit board 570.

Optionally, as shown in fig. 4 and 17, a test button 610, a first contact 621 and a second contact 622 are further provided in the accessory housing 500, and the first contact 621 and the second contact 622 are respectively in signal connection with the circuit board 570. When the circuit breaker needs to be subjected to a trip function test, the test button 610 can be driven by an external force to slide along the accessory housing 500, so that the first contact 621 is driven to approach the second contact 622, the first contact 621 is made to contact with the second contact 622, an analog current signal is sent to the circuit board 570, and after the circuit board 570 receives the analog current signal, the control release 560 is electrified, the transmission piece 580 is driven, and then the operating mechanism is driven to open the brake.

Optionally, based on the use requirement of the test, a third elastic member 611 connected to the test button 610 may be further provided, so that when the test button 610 is pressed by an external force, the third elastic member 611 stores energy, and when the external force is removed, the test button 610 can be reset under the action of the third elastic member 611. The first contact 621 may be provided as a spring contact, whereby the first contact 621 can also be separated from the second contact 622 after the test button 610 is reset. Therefore, the interference to the normal work of the circuit breaker is avoided.

Optionally, as shown in fig. 19, the trip 560 includes a first push rod 561, a yoke 564, a coil 565, a fourth elastic member 566, a movable iron core 562 and a stationary iron core 563, wherein the stationary iron core 563 is sleeved on an outer periphery of the movable iron core 562, the fourth elastic member 566 is further disposed between the movable iron core 562 and the stationary iron core 563, the yoke 564 is disposed on an outer periphery of the stationary iron core 563, the coil 565 is wound on an outer periphery of the yoke 564, and the first push rod 561 is disposed at one end of the movable iron core 562. As shown in fig. 21, an inner tapered wall 567 is provided around the inner peripheral wall of the stationary core 563, and as shown in fig. 22, an outer tapered wall 568 that fits the inner tapered wall 567 is provided around the outer peripheral wall of the movable core 562. As shown in fig. 19, when the coil 565 is de-energized, the movable iron core 562 and the static iron core 563 have a certain distance therebetween, and the first push rod 561 retracts the release 560. As shown in fig. 20, when the circuit board 570 controls the coil 565 to be energized, the movable iron core 562 moves towards the static iron core 563 under the action of the magnetic field, so that the first push rod 561 extends to push the transmission member 580 to move, and then the fourth elastic member 566 is compressed, and when the movable iron core 562 moves towards the static iron core 563, the movement of the movable iron core 562 is limited by the abutment of the inner conical wall 567 and the outer conical wall 568. After the coil 565 is de-energized, the movable iron core 562 moves away from the stationary iron core 563 under the release of the compressed fourth resilient member 566, and returns to the position shown in fig. 19. In addition, the inner conical wall and the outer conical wall which are matched with each other are respectively arranged on the static iron core 563 and the movable iron core 562, and the driving force of the magnetic field generated by the coil to the movable iron core 562 can be effectively increased under the condition that the whole volume of the tripper 560 is not increased, so that the action speed and the tripping reliability of the tripper 560 are improved.

The first elastic member, the second elastic member, the third elastic member 611 and the fourth elastic member 566 may be various forms of torsion springs, tension springs, compression springs, plate springs, etc., and the present application does not particularly limit the same.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (12)

1. A circuit breaker, comprising: the circuit breaker comprises an accessory shell with a cuboid structure and a circuit breaker shell with a cuboid structure, wherein the accessory shell and the circuit breaker shell are arranged in parallel along the width direction;

an input terminal, a through terminal, an operating mechanism, a moving contact and a static contact are arranged in the breaker shell, the input terminal is connected with the moving contact, the operating mechanism is in driving connection with the moving contact, and the operating mechanism drives the moving contact and the static contact to switch on or switch off;

the accessory shell is internally provided with a mutual inductor, a connecting terminal and a tripper, the tripper is in driving connection with the operating mechanism, one end of a first connecting wire is connected with the fixed contact, the other end of the first connecting wire penetrates through the mutual inductor and is connected with the connecting terminal, one end of a second connecting wire is connected with the connecting terminal, the other end of the second connecting wire penetrates through the mutual inductor and is connected with the through terminal, the mutual inductor is used for collecting current signals of the first connecting wire and the second connecting wire, the mutual inductor is in signal connection with the tripper, and the tripper is used for driving the operating mechanism to be switched off according to the current signals.

2. The circuit breaker of claim 1, wherein a transmission member is further disposed in the accessory housing, the transmission member is drivingly connected to the operating mechanism, and an action end of the trip unit corresponds to the transmission member for driving the transmission member to move to drive the operating mechanism to open according to the current signal.

3. The circuit breaker of claim 2, further comprising a reset mechanism disposed on the accessory housing, wherein a latch is disposed on the transmission member, and wherein the reset mechanism is driven to store energy and reset to abut the latch at a first abutment position; the tripper drives the transmission piece to move so as to release the butting of the buckling part and the reset mechanism at the first butting position, so that the reset mechanism can release energy and is butted with the buckling part at the second butting position to limit the switching-on of the operating mechanism.

4. The circuit breaker according to claim 3, wherein the reset mechanism includes a reset portion, the reset portion includes a first mating wall and a second mating wall, the latch portion includes a latch wall and a latching wall, the reset portion abuts against the latch wall of the latch portion at the first abutting position through the first mating wall, and the reset portion abuts against the latching wall of the latch portion at the second abutting position through the second mating wall.

5. The circuit breaker of claim 3, further comprising a first resilient member coupled to the transmission member for providing a reset force to the transmission member; the reset mechanism comprises a reset button and a second elastic piece, the second elastic piece is connected with the reset button, and the reset button is driven to reset and drives the second elastic piece to store energy.

6. The circuit breaker according to claim 2, wherein the transmission member includes a transmission portion and a driving portion, the transmission member is drivingly connected to the operating mechanism through the transmission portion, and the action end of the trip unit corresponds to the driving portion, so that the trip unit drives the driving portion to drive the transmission member to move, and the transmission member drives the operating mechanism to open through the transmission portion.

7. The circuit breaker of claim 1, wherein a circuit board is further disposed in the accessory housing, the circuit board being in signal connection with the transformer and the trip unit, respectively, and the circuit board being configured to control the trip unit to operate the operating mechanism to open according to the current signal.

8. The circuit breaker of claim 7, wherein said terminal block includes a first terminal block connected to said first connection line and a second terminal block connected to said second connection line, said circuit board being connected to said first terminal block and said second terminal block, respectively.

9. The circuit breaker of claim 7, wherein a test button, a first contact and a second contact are further disposed in the accessory housing, the first contact and the second contact are respectively in signal connection with the circuit board, the test button is driven to drive the first contact and the second contact to contact so as to send an analog current signal to the circuit board, and the circuit board is used for controlling the release to drive the operating mechanism to open according to the analog current signal.

10. The circuit breaker of claim 9, further comprising a third spring coupled to the test button, the third spring to provide a reset force to the test button, the first contact being a spring contact.

11. The circuit breaker according to any one of claims 1 to 10, wherein the release comprises a movable core and a stationary core sleeved on the outer periphery of the movable core, the movable core is driven to slide relative to the stationary core along a release direction to drive the operating mechanism to open the brake, an inner conical wall is annularly arranged on the inner peripheral wall of the stationary core, and an outer conical wall matched with the inner conical wall is annularly arranged on the outer peripheral wall of the movable core.

12. The circuit breaker according to any one of claims 1 to 10, wherein an instantaneous release is further provided in the circuit breaker housing, the first connection line is provided around an outer periphery of the instantaneous release, and an action end of the instantaneous release corresponds to the operating mechanism for controlling opening of the operating mechanism according to a current of the first connection line.

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