Plug-in circuit breaker

Abstract

A plug-in circuit breaker comprises a shell, an operating mechanism, a static contact and a moving contact, a closing handle and an opening handle of the operating mechanism are respectively arranged on the shell in a sliding mode, a closing locking piece is assembled in a rotating mode and is respectively matched with the closing handle and the opening handle, the contact mechanism further comprises a contact spring, and the moving contact and the contact spring are respectively arranged in a rotating mode. When the closing handle is pressed to a closing position, the contact spring firstly drives the moving contact to switch on the contact mechanism and provide contact pressure for the moving contact, the closing handle then closes the solid-state electronic switch, the closing handle is in limiting fit with the closing locking piece, and when the opening handle is pulled to an opening position, the solid-state electronic switch is closed. The switching-off handle drives the switching-on locking piece to release the limiting cooperation with the switching-on handle, so that when the switching-on handle moves to the switching-off position, the solid-state electronic switch is firstly switched off, and then the moving contact is driven to switch off the contact mechanism. According to the invention, the mechanism of the operation mechanism is simplified, misoperation in the operation process can be prevented, and the reliability and the use safety of the product are improved.

Description

Technical Field

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

[0002] A circuit breaker is a common electrical protection device with short-circuit and overload protection. It can quickly disconnect the fault current when an overload or short-circuit fault occurs in the power distribution system, protecting the power distribution system and electrical appliances. When a conventional circuit breaker encounters a line overload and short-circuit current and breaks, the arc generated causes irreversible damage to the circuit breaker, posing a hidden danger to the long-term stable operation of the circuit breaker in the power distribution system. For this reason, existing circuit breakers connect a mechanical switch and a solid-state electronic switch to the main line, and control the order of opening and closing of the mechanical switch and the solid-state electronic switch to ensure that the contact mechanism of the mechanical switch is disconnected without arcing.

[0003] In existing plug-in circuit breakers, an operating piece is usually configured at the operating end, and the same operating piece is used to realize opening and closing. Such a structure has the following defects: first, the operating piece needs to cooperate with multiple internal mechanisms, which makes its internal structure complicated and not conducive to assembly; second, the operating piece has both closing and opening functions, which is prone to malfunction during operation; third, the operating piece is usually connected to the contact mechanism in the circuit breaker, and the operating piece is driven to open in the closed state, which poses a safety hazard. Summary of the invention

[0004] The object of the present invention is to overcome at least one defect of the prior art and provide a plug-in circuit breaker with simple structure and high reliability.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a plug-in circuit breaker, comprising a housing and a main circuit arranged in the housing, wherein the on and off of the main circuit is controlled by a solid-state electronic switch and a contact mechanism, wherein the contact mechanism comprises a static contact and a moving contact that cooperate with each other, wherein the opposite ends of the housing serve as an operating end and a plug-in end respectively, wherein the operating end is slidably provided with an operating mechanism, wherein the operating mechanism comprises a closing handle, an opening handle and a closing locking piece, wherein the closing handle and the opening handle are respectively slidably arranged with the housing, wherein the closing locking piece is rotatably assembled and respectively cooperates with the closing handle and the opening handle, wherein the contact mechanism further comprises a contact spring, wherein the moving contact and the contact spring are respectively rotatably arranged,

[0007] When the closing handle is pressed to the closing position, the contact spring first drives the moving contact to connect the contact mechanism and provide contact pressure for the moving contact, and the closing handle then closes the solid-state electronic switch, and the closing handle and the closing locking member are limitedly matched.

[0008] When the opening handle is pulled to the opening position, the opening handle drives the closing locking piece to release the limit cooperation with the closing handle, so that when the closing handle moves to the opening position, it first disconnects the solid-state electronic switch and then drives the moving contact to disconnect the contact mechanism.

[0009] Preferably, the static contact is arranged in a housing between the operating end and the solid-state electronic switch, the moving contact is rotatably assembled in the housing, and one end of the moving contact passes through the middle of the closing handle and is spaced opposite to the static contact.

[0010] Preferably, the moving contact, the contact spring and the closing locking member are coaxially rotatably assembled, one end of the contact spring elastically abuts against the moving contact, and the other end of the contact spring elastically abuts against the closing handle.

[0011] Preferably, the contact mechanism further comprises a partition, the moving contact and the closing locking member are coaxially rotatably assembled, and the partition is arranged between the moving contact and the closing locking member.

[0012] Preferably, the contact spring includes two torsion springs, each torsion spring includes a twisted portion, and the opposite ends of the twisted portion extend outward to form a first elastic arm and a second elastic arm, respectively. The twisted portions of the two torsion springs are arranged axially at intervals, and the two first elastic arms are connected to form a U-shaped elastic arm, which is elastically abutted against the moving contact, and one of the second elastic arms is deflected toward the direction of the other second elastic arm and merged to form a Y-shaped elastic arm, and the end of the Y-shaped elastic arm is connected to the second connecting hole of the closing handle.

[0013] Preferably, a locking hole is provided on the side wall of the housing connected between the operating end and the plugging end, and a locking mechanism is rotatably provided between the locking hole and the operating mechanism.

[0014] The locking mechanism comprises a first locking member and a second locking member, wherein the elastic reset member is arranged between the first locking member and the second locking member so that the first locking member and the second locking member maintain opposite movement trends.

[0015] The closing handle drives the first locking piece to cooperate with the elastic reset piece, so that the first locking portion of the first locking piece extends out of the locking hole or retracts into the shell, and the opening handle drives the second locking piece to cooperate with the elastic reset piece, so that the second locking portion of the second locking piece extends out of the locking hole or retracts into the shell.

[0016] Preferably, the first locking member, the second locking member and the elastic return member are coaxially rotatably assembled, and two elastic arms of the elastic return member are elastically connected to the first locking member and the second locking member respectively.

[0017] Preferably, when closing the switch, the closing handle drives the first locking portion of the first locking member to extend out of the locking hole, and the elastic reset member drives the second locking portion of the second locking member to extend out of the locking hole.

[0018] When the switch is opened, the elastic reset member drives the first locking portion to retract into the housing and keeps the second locking portion extending out of the locking hole.

[0019] When pulled, the opening handle drives the second locking member to retract the second locking portion into the housing.

[0020] Preferably, a tripping mechanism is also provided in the housing, and the tripping mechanism includes an electromagnetic tripper, and the closing locking piece is rotatably provided between the electromagnetic tripper and the closing handle. When the electromagnetic tripper is actuated, the closing locking piece is driven to rotate, so that after the closing locking piece releases the limiting cooperation with the closing handle, the closing handle moves to the opening position and the tripping mechanism jointly limits the closing locking piece.

[0021] Preferably, the tripping mechanism also includes a tripping reset member, the electromagnetic trip device includes a coil assembly and a moving assembly driven by the coil assembly, the closing locking member is provided with a linkage hole, one end of the moving assembly slides through the linkage hole, and the tripping reset member is elastically arranged on the moving assembly between the closing locking member and the coil assembly. When the electromagnetic trip device or the opening handle drives the closing locking member to rotate, the closing handle, the closing locking member and the tripping reset member maintain a balanced state.

[0022] Preferably, the linkage hole comprises an installation area and a matching area which are interconnected, the inner diameter of the installation area is larger than the inner diameter of the matching area, and one end of the moving component is slidably offset into the matching area after being installed in the installation area.

[0023] Preferably, a closing reset member is connected between the closing handle and the housing, and an opening reset member is connected between the opening handle and the housing.

[0024] Preferably, a pressing portion that slides out of the outer shell is provided at one end of the closing handle, and a trigger portion is provided at the other end of the closing handle. A first driving portion and a second driving portion are protruding from the middle portion of the closing handle, and a locking groove is connected between the first driving portion and the second driving portion. The first driving portion and the locking groove are used to cooperate with the locking portion of the closing locking member, and the second driving portion is used to cooperate with a locking mechanism arranged in the outer shell. A first connecting hole and a second connecting hole are opened in the middle portion of the closing handle, and the first connecting hole provides a passing space for one end of the moving contact, and the second connecting hole is connected to the contact spring.

[0025] Preferably, the second connecting hole is located between the first connecting hole and the pressing portion, and in the process of pressing the closing handle to the closing position, the displacement of one end of the contact spring connected to the second connecting hole in the closing direction is greater than the distance between the static contact and the moving contact in the opening position.

[0026] Preferably, the second connection hole is provided with an inclined driving surface, one end of the contact spring cooperates with the driving surface, and the other end of the contact spring is connected to one end of the moving contact passing through the first connection hole.

[0027] The side of the first connection hole close to the second connection hole serves as a switch-off limit surface. When in the switch-off position, a gap is left between one end of the moving contact passing through the first connection hole and the switch-off limit surface.

[0028] During the process of pressing the closing handle to the closing position, the driving surface first drives one end of the contact spring to move toward the direction close to the static contact, so that the contact spring undergoes elastic deformation to drive the moving contact to contact the static contact, and the opening limit surface then approaches or fits the moving contact.

[0029] Preferably, the closing handle is provided with a first connecting hole, the moving contact passes through the first connecting hole, and the length of the first connecting hole along the closing direction is greater than the length of the moving path of the moving contact when closing.

[0030] Preferably, one end of the opening handle is provided with a handle portion extending out of the outer shell, and the other end of the opening handle is provided with a protruding first unlocking portion, and the first unlocking portion is driven to cooperate with the closing locking member. A second unlocking portion is provided in the middle portion of the opening handle, and the second unlocking portion is used to cooperate with a locking mechanism arranged in the outer shell. At least one positioning portion is protruding from the middle portion of the opening handle, and the positioning portion cooperates with the outer shell to limit the pulling stroke of the opening handle, and a closing reset member is connected between one of the positioning portions and the outer shell.

[0031] Preferably, a connecting hole is provided in the middle of the closing locking piece for rotatably assembling in the outer shell, one end of the closing locking piece is connected to a rod body serving as a locking part, and the other end of the closing locking piece is provided with a linkage hole, the central axis of the locking part is perpendicular to the central axis of the connecting hole, and the central axis of the linkage hole is perpendicular to the central axis of the connecting hole.

[0032] Preferably, the moving contact includes a plate-shaped assembly portion, a mounting hole is opened in the middle of the assembly portion, one end of the assembly portion extends outward to form a moving contact arm, and a moving contact point is provided at one end of the moving contact arm away from the assembly portion, the middle part of the moving contact arm passes through the middle part of the closing handle, and the other end of the assembly portion extends to form a connecting arm, and the connecting arm is perpendicular to the central axis of the moving contact arm.

[0033] Preferably, the main line includes at least one pair of wiring assemblies, at least one pair of busbar clamps, a contact mechanism and a conductive system, the conductive system includes a first conductive plate and two second conductive plates, the two ends of the first conductive plate are respectively connected to one of the wiring assemblies and one busbar clamp, and the contact mechanism is connected in series between another wiring assembly and another busbar clamp through the two second conductive plates.

[0034] Preferably, a control circuit board is also provided in the housing, the control circuit board is connected to a solid-state electronic switch, a solid-state circuit for controlling the solid-state electronic switch is provided on the control circuit board, the control circuit board is electrically connected to a busbar clamp through a second conductive plate, and the control circuit board is electrically connected to the contact mechanism through another second conductive plate.

[0035] Preferably, a heat conducting plate is provided on a side of each second conductive plate facing away from the control circuit board, and one end of the heat conducting plate is provided against a surface of the first conductive plate.

[0036] Preferably, the control circuit board includes two stacked first circuit boards, the first conductive end of each second conductive plate electrically connects the two first circuit boards and extends along the surface of one of the first circuit boards, and the heat conducting plate is arranged on each first conductive end.

[0037] Preferably, the control circuit board is further provided with an indicator light, the operating end is provided with an indicator hole, a light guide column is provided between the indicator hole and the indicator light, and the light guide column is used to transmit the status of the indicator light.

[0038] The plug-in circuit breaker of the present invention divides the operating mechanism into a closing handle, an opening handle and a closing locking piece. The closing handle is pressed to connect the contact mechanism and the solid-state electronic switch, and the opening handle is pulled to disconnect the contact mechanism and the solid-state electronic switch. The connection and disconnection of the main line are respectively completed by the cooperation of the closing handle, the opening handle and the closing locking piece. The moving contact is driven by the contact spring to first connect the contact mechanism and provide contact pressure for the contact mechanism when closing. This simplifies the structure of the operating mechanism and can prevent malfunctions during operation, thereby improving the reliability and safety of the product.

[0039] In addition, the closing locking piece cooperates with the electromagnetic release. After the electromagnetic release or the opening handle drives the closing locking piece to rotate, the closing handle and the tripping mechanism jointly limit the closing locking piece, and the cooperation is stable. In particular, the closing locking piece is coaxially assembled with the moving contact and separated by a partition, which saves internal space and makes the layout more reasonable.

[0040] In particular, after the closing locking member is driven to rotate by the electromagnetic release, the closing handle, the closing locking member and the tripping reset member remain in a balanced state. At this time, no requirements are made on the position of the moving component, which reduces the requirements on the electromagnetic release.

[0041] In addition, the two locking pieces of the locking mechanism ensure that the circuit breaker is stably positioned on the cabinet during normal opening and closing, and has high reliability.

[0042] In addition, the closing handle is provided with a closing reset piece. When the closing handle and the closing locking piece are unlocked, the closing reset piece drives the closing handle to move to the opening position, avoiding manual operation of the closing handle and improving safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of the plug-in circuit breaker of the present invention;

[0044] Figure 2 It is a structural schematic diagram of the operating end in the present invention;

[0045] Figure 3 It is a schematic diagram of the internal structure of the plug-in circuit breaker of the present invention;

[0046] Figure 4 It is a cross-sectional view of the present invention when the switch is closed;

[0047] Figure 5 It is a structural schematic diagram of the operating mechanism and the locking mechanism in the present invention when the switch is closed;

[0048] Figure 6 It is a structural schematic diagram of the operating mechanism of the present invention when the switch is closed;

[0049] Figure 7 yes Figure 6 A local enlarged view of A1 in the middle;

[0050] Figure 8 It is a structural schematic diagram of the operating mechanism of the present invention when it is about to open the gate;

[0051] Fig. 9 yes Figure 8 A partial enlarged view of B1 in the middle;

[0052] Fig.10 It is a schematic diagram of the structure of the operating mechanism and the locking mechanism in the present invention when the gate is about to be opened;

[0053] Fig.11 This is a schematic diagram of the structure of the operating mechanism of the present invention when the gate is opened. Figure 1 ;

[0054] Fig.12 This is a schematic diagram of the structure of the operating mechanism of the present invention when the gate is opened. Figure 2 ;

[0055] Fig.13 yes Fig.12 A partial enlarged view of A2 in the middle;

[0056] Fig.14 This is a schematic diagram of the structure of the operating mechanism and the locking mechanism in the present invention when the gate is opened. Figure 1 ;

[0057] Fig.15This is a schematic diagram of the structure of the operating mechanism and the locking mechanism in the present invention when the gate is opened. Figure 2 ;

[0058] Fig.16 yes Fig.15 A partial enlarged view of B2 in the middle;

[0059] Fig.17 It is a schematic diagram of the cooperation between the locking mechanism and the operating mechanism in the opening position of the present invention (excluding the first locking member);

[0060] Fig.18 It is a schematic diagram of the cooperation between the locking mechanism and the operating mechanism in the open position in the present invention;

[0061] Fig.19 It is a structural schematic diagram of the locking mechanism and the operating mechanism in the present invention at the disassembly position;

[0062] Fig. 20 It is a structural schematic diagram of the control system in the present invention;

[0063] Fig.21 It is a schematic diagram of the structure of the heat conducting plate, the second conductive plate and the control circuit board in the present invention;

[0064] Fig. 22 This is a schematic diagram of the structure of the closing handle in the present invention. Figure 1 ;

[0065] Fig.23 This is a schematic diagram of the structure of the closing handle in the present invention. Figure 2 ;

[0066] Fig.24 It is a structural schematic diagram of the opening handle in the present invention;

[0067] Fig.25 It is a structural schematic diagram of the closing locking member in the present invention;

[0068] Fig.26 It is a schematic diagram of the structure of the contact spring in the present invention;

[0069] Fig. 27 It is a structural schematic diagram of the moving contact in the present invention;

[0070] Fig.28 is a schematic structural diagram of the first locking member in the present invention;

[0071] Fig.29 is a schematic structural diagram of the second locking member in the present invention;

[0072] Fig.30 is a cross-sectional view of the electromagnetic release of the present invention;

[0073] Figure numerals: A-operating mechanism, 11-opening handle, 111-handle portion, 112-second unlocking portion, 113-first unlocking portion, 114-first positioning portion, 115-second positioning portion, 12-opening reset member, 13-closing handle, 131-pressing portion, 132-second connecting hole, 133-first connecting hole, 134-trigger portion, 135-reset hole, 136-first driving portion, 137-locking groove, 138-second driving portion, 14-closing locking member, 1 41-locking part, 142-connecting hole, 143-linking area, 144-matching area, 15-closing reset part, B-locking mechanism, 21-first locking part, 211-first mounting part, 212-first mounting boss, 213-first connecting groove, 214-first matching groove, 215-first matching part, 216-first locking part, 22-second locking part, 221-second matching part, 222-second mounting part, 223-second connecting groove, 224-second locking part, 23 -elastic reset member, C-tripping mechanism, 31-electromagnetic release, 311-moving iron core, 3111-blocking part, 3112-sliding part, 312-magnetic yoke, 313-coil frame, 314-coil, 315-static iron core, 32-tripping reset member, D-control system, 41-first circuit board, 42-second circuit board, 43-signal terminal, E-heat dissipation structure, 5-heat conductive plate, 51-abutting part, F-conductive system, 61-busbar clamp, 62-first conductive plate, 63 -second conductive plate, 631-first conductive end, 64-wiring assembly, G-contact mechanism, 71-static contact, 72-moving contact, 721-assembly portion, 722-moving contact arm, 723-connecting arm 723, 73-contact spring, 731-U-shaped elastic arm, 733-Y-shaped elastic arm, 732-twisted portion, 74-partition, 8-housing, 801-operating end, 802-plugging end, 803-indicator hole, 804-light guide column, 805-installation slot, 806-locking hole. DETAILED DESCRIPTION

[0074] The following is a further description of the specific implementation of the plug-in circuit breaker of the present invention in conjunction with the embodiments given in the accompanying drawings. The plug-in circuit breaker of the present invention is not limited to the description of the following embodiments.

[0075] like Figure 1-3As shown, the plug-in circuit breaker includes a housing 8, and the opposite ends of the housing 8 are respectively used as an operating end 801 and a plug-in end 802. A main circuit, an operating mechanism A and a control system D are arranged in the housing 8 between the operating end 801 and the plug-in end 802, wherein the main circuit includes at least one pair of wiring components 64, at least one pair of busbar clamps 61, a conductive system F and a contact mechanism G. The wiring components 64 and the busbar clamps 61 are respectively correspondingly arranged at the operating end 801 and the plug-in end 802 for external wiring, wherein each busbar clamp 61 is connected to a wiring component 64 through the conductive system F, and the contact mechanism G is connected in series between a wiring component 64 and a The contact mechanism G is connected between a busbar clamp 61 and a moving contact 72. The control system D includes a control circuit board, which is connected to a solid-state electronic switch. The controller of the control circuit board can output a control signal to drive the solid-state electronic switch according to the received signal, wherein the solid-state circuit for controlling the solid-state electronic switch is controlled by a microswitch arranged on the control circuit board. The solid-state circuit is connected between the contact mechanism G and a busbar clamp 61 through a conductive system F. The contact mechanism G and the microswitch are driven by the operating mechanism A to control the connection or disconnection of the main line. Of course, the microswitch can also be replaced by a photosensitive element, a Hall switch, etc.

[0076] Furthermore, a locking hole 806 is provided on the side wall of the housing 8 connected between the operating end 801 and the plugging end 802 (see Figure 4 ), a locking mechanism B is also provided in the housing 8 on one side of the locking hole 806, and the plug-in circuit breaker can be locked or unlocked with the cabinet by operating the mechanism A or directly driving the locking mechanism B to cooperate with the locking hole 806.

[0077] Furthermore, a tripping mechanism C is also provided in the housing 8, and the tripping mechanism C includes an electromagnetic tripper 31, which cooperates with the operating mechanism A, and the electromagnetic tripper 31 is connected to the control circuit board. The controller of the control circuit board outputs a control signal to drive the electromagnetic tripper 31 to operate.

[0078] The improvement of the present application is that the operating mechanism A includes a closing handle 13, an opening handle 11 and a closing lock 14, the closing handle 13 and the opening handle 11 are respectively slidably arranged with the housing 8, the closing lock 14 is rotatably assembled and respectively cooperates with the closing handle 13 and the opening handle 11, the contact mechanism G also includes a contact spring 73, the moving contact 72 and the contact spring 73 are respectively rotatably arranged, and when the closing handle 13 is pressed to the closing position, the contact spring 73 first drives the moving contact 72 to connect the contact mechanism G and provides contact pressure for the moving contact 72, and the closing handle 13 then closes the solid-state electronic switch. The closing handle 13 and the closing locking piece 14 are limited in cooperation. When the opening handle 11 is pulled to the opening position, the opening handle 11 drives the closing locking piece 14 to release the limited cooperation with the closing handle 13, so that when the closing handle 13 moves to the opening position, it first disconnects the solid-state electronic switch and then drives the moving contact 72 to disconnect the contact mechanism G.

[0079] In this way, the operating mechanism A is divided into a closing handle 13, an opening handle 11 and a closing locking piece 14. The closing handle 13 is pressed to connect the contact mechanism G and the solid-state electronic switch, and the opening handle 11 is pulled to disconnect the contact mechanism G and the solid-state electronic switch. The connection and disconnection of the main line are respectively completed by the closing handle 13, the opening handle 11 and the closing locking piece 14. The moving contact 72 is driven by the contact spring 73 to first connect the contact mechanism G and provide contact pressure for the contact mechanism G when closing. This not only simplifies the structure of the operating mechanism A, but also prevents malfunctions during operation, thereby improving the reliability and safety of the product.

[0080] Further, if Figure 5 , 6 As shown in 8-19, the contact mechanism G includes a moving contact 72 and a stationary contact 71 that cooperate with each other, wherein the moving contact 72 is rotatably assembled in the housing 8, and the stationary contact 71 is fixedly arranged in the housing 8, and one end of the moving contact 72 passes through the closing handle 13 and is spaced opposite to the stationary contact 71. Preferably, the moving contact 72 is coaxially rotatably assembled with the closing locking piece 14, and the moving contact 72 and the closing locking piece 14 can be separated by setting a partition 74 to improve the utilization rate of the internal space and make the internal structure more compact.

[0081] Furthermore, the electromagnetic release 31 in the tripping mechanism C can also be used to drive the closing lock 14. The closing lock 14 is rotatably arranged between the electromagnetic release 31 and the closing handle 13. When the electromagnetic release 31 is actuated, the closing lock 14 is driven by the electromagnetic release 31 to rotate, so that the closing handle 13 moves to the opening position after the limiting cooperation with the closing lock 14 is released. The closing handle 13 located in the opening position can limit the closing lock 14 together with the tripping mechanism C. Of course, when the opening handle 11 drives the closing lock 14 to rotate in the opening position, the closing handle 13 located in the opening position can also limit the closing lock 14 together with the tripping mechanism C.

[0082] Specifically, Figure 3-6 , 10, 12, 14, 15 and 30, the tripping mechanism C includes an electromagnetic tripper 31 and a tripping reset member 32, the electromagnetic tripper 31 includes a coil assembly and a moving assembly driven by the coil assembly, the closing lock member 14 is provided with a linkage hole, one end of the moving assembly slides through the linkage hole, and the tripping reset member 32 is elastically arranged on the moving assembly between the closing lock member 14 and the coil assembly. When the electromagnetic tripper 31 or the opening handle 11 drives the closing lock member 14 to rotate, the closing handle 13, the closing lock member 14 and the tripping reset member 32 maintain a balanced state, and the positional relationship between the closing lock member 14 and the moving assembly in the balanced state is relatively flexible. The moving assembly can be automatically reset, and can also be driven to reset when the closing lock member 14 is reset, thereby reducing the requirements for the electromagnetic tripper 31.

[0083] Furthermore, the linkage hole includes an installation area 143 and a matching area 144 which are interconnected, wherein the inner diameter of the installation area 143 is larger than the inner diameter of the matching area 144. After one end of the moving component of the electromagnetic release 31 is slid into the installation area 143, it slides and deviates into the matching area. When the closing handle 13 and the closing locking member 14 are limitedly matched, the moving direction of the moving component is parallel to the central axis of the linkage hole. When the moving component is driven or the opening handle 11 is pulled to the opening position, as the closing locking member 14 rotates, the moving direction of the moving component forms an angle with the central axis of the linkage hole, but the matching area 144 does not interfere with the movement of the moving component, and the closing locking member 14, the tripping reset member 32 and the closing handle 13 are kept in a balanced state.

[0084] Further, such as Figure 1-5 As shown in Figures 8-10 and 19, a locking mechanism B is rotatably arranged between the locking hole 806 and the operating mechanism A, wherein the locking mechanism B includes two locking members and an elastic reset member 23 arranged between the two locking members, and the elastic reset member 23 enables the two locking members to maintain opposite movement trends. When the switch is closed or opened, the operating mechanism A drives the locking portion of one of the locking members to extend out of the locking hole 806, and the locking portion cooperates with the cabinet to limit the position, thereby improving the installation reliability of the product.

[0085] Combination Figure 1-30 A specific embodiment of a plug-in circuit breaker is provided.

[0086] like Figure 1-3 As shown, the plug-in circuit breaker includes a housing 8, and the opposite ends of the housing 8 are respectively used as an operating end 801 and a plug-in end 802. The operating end 801 is provided with at least two operating holes and at least two wiring ports, one of which is a closing operating hole and the other is an opening operating hole. The plug-in end 802 is provided with a plurality of sockets, and a locking hole 806 is provided on the side wall of the housing 8 connected between the operating end 801 and the plug-in end 802 (see Fig.19 ), the locking hole 806 is closer to the operating end 801; a main line, an operating mechanism A and a control system D are arranged in the shell 8, wherein the main line is connected between the operating end 801 and the plug-in end 802, the operating mechanism A is arranged at the operating end 801, and the control system D is arranged in the middle of the shell 8 between the operating mechanism A and the plug-in end 802.

[0087] Specifically, the main line includes a pair of wiring components 64, a pair of busbar clamps 61 and a conductive system F, wherein a pair of wiring components 64 are arranged at the operating end 801, and each wiring component 64 corresponds to a wiring port, and a pair of busbar clamps 61 are arranged at the plug-in end 802. Preferably, each busbar clamp 61 corresponds to a socket, and a pair of busbar clamps 61 are respectively arranged on opposite sides of the plug-in end 802; the conductive system F includes a first conductive plate 62 and two second conductive plates 63, and the contact mechanism G is connected to the conductive system F. The first conductive plate 62 is arranged along the side position in the housing 8, and the two ends of the first conductive plate 62 are respectively connected to a wiring component 64 and a busbar clamp 61, and the contact mechanism G includes a moving contact 72, a static contact 71 and Contact spring 73, wherein the contact spring 73 and the moving contact 72 are respectively rotatably arranged, the moving contact 72 cooperates with the static contact 71, the control system D includes a control circuit board, the static contact 71 is arranged between the control circuit board and the operating end 801, the control circuit board is provided with a solid-state circuit for controlling a solid-state electronic switch, the connection and disconnection of the solid-state circuit is controlled by a micro switch arranged on the control circuit board, the control circuit board is respectively connected to two second conductive plates 63, one of the second conductive plates 63 is connected to a busbar clamp 61, the contact mechanism G is electrically connected between the other busbar clamp 61 and the other second conductive plate 63, and the contact mechanism G and the micro switch can be controlled simultaneously by driving the operating mechanism A, thereby controlling the connection and disconnection of the main line.

[0088] like Figure 3-19As shown, an operating mechanism A is arranged in the housing 8 between the operating end 801 and the plug-in end 802, and the operating mechanism A includes a closing handle 13, an opening handle 11 and a closing lock 14, wherein the closing handle 13 and the opening handle 11 are respectively slidably arranged, and the closing handle 13 is in the closing position (see Figure 5 ), open position (see Fig.12 , 13 ) between the opening handle 11 and the original position (see Figure 5 ), open position (see Figure 8 ) and removal position (see Fig.19 ), and the opening position is between the original position and the disassembled position, the closing locking piece 14 is rotated and assembled and respectively cooperates with the closing handle 13 and the opening handle 11, and the closing handle 13 is pressed to the closing position. During this process, the closing handle 13 drives the contact spring 73, so that the contact spring 73 first drives the moving contact 72 to connect the contact mechanism G and provides contact pressure for the moving contact 72, and then the closing handle 13 closes the solid-state electronic switch, the closing handle 13 and the closing locking piece 14 limit cooperation, the opening handle 11 is pulled to the opening position, and the opening handle 11 drives the closing locking piece 14 to release the limit cooperation with the closing handle 13, so that when the closing handle 13 moves to the opening position, it first disconnects the solid-state electronic switch and then disconnects the contact mechanism G.

[0089] Preferably, a closing reset member 15 is connected between the closing handle 13 and the housing 8. When the closing handle 13 and the closing locking member 14 are released from the limit cooperation, the closing reset member 15 drives the closing handle 13 to move from the closing position to the opening position, thereby avoiding manual operation of the closing handle 13 in the closed state, thereby improving operational safety; an opening reset member 12 is arranged between the opening handle 11 and the housing 8. When the opening handle 11 is pulled to the opening position or in the disassembled position, the opening handle 11 is driven by the opening reset member 12 to return to the original position. In this embodiment, the closing reset member 15 and the opening reset member 12 are preferably springs, which have a simple structure and low cost.

[0090] like Figure 7 , 13 As shown, the static contact 71 of the contact mechanism G is arranged in the housing 8 between the operating end 801 and the solid-state electronic switch, and the moving contact 72 and the contact spring 73 are respectively rotatably assembled in the housing 8, wherein one end of the moving contact 72 slides through the middle of the closing handle 13 and is spaced opposite to the static contact 71. When the closing handle 13 is pressed to the closing position, and one end of the closing handle 13 is driven to the opening position by the closing reset member 15, the moving contact 72 is driven to rotate by the closing handle 13, so that the end of the moving contact 72 passing through the closing handle 13 contacts or separates from the static contact 71.

[0091] Preferably, Figure 5 ,10 As shown in Figures 11, 14, 16-19 and 26, the contact spring 73 is preferably a torsion spring, so that the moving contact 72, the contact spring 73 and the closing lock 14 can be coaxially rotatably assembled, one end of the contact spring 73 elastically abuts against the moving contact 72, and the other end of the moving contact 72 abuts against the closing handle 13. Therefore, in the process of pressing the closing handle 13 to the closing position, the contact spring 73 first drives the moving contact 72 to connect the contact mechanism G. When the moving contact 72 contacts the static contact 71, contact pressure can be provided, and then the closing handle 13 connects the solid-state electronic switch; further, the contact mechanism G also includes a partition 74, which is separated and arranged between the moving contact 72 and the closing lock 14 to isolate the moving contact 72 from the closing lock 14.

[0092] like Figure 3-5 , 8, 10, 17-19, 28 and 29, a locking mechanism B is also provided in the housing 8, and the locking mechanism B is rotatably assembled between the operating mechanism A and the locking hole 806. The locking mechanism B includes two locking members and an elastic reset member 23. The two locking members are respectively driven and cooperated with the operating mechanism A. An elastic reset member 23 is provided between the two locking members, and the two locking members are driven by the elastic reset member 23 to maintain opposite movement trends. For the convenience of description, the two locking members are respectively a first locking member 21 and a second locking member 22. The elastic reset member 23 drives the first locking portion 216 of the first locking member 21 to retract into the housing 8, and the elastic reset member 23 drives the second locking portion 223 of the second locking member 22 to extend out of the locking hole 806. When the switch is closed, , the operating mechanism A drives the first locking member 21 to overcome the elastic force of the elastic reset member 23, so that the first locking portion 216 extends out of the locking hole 806, and at the same time, the elastic reset member 23 drives the second locking portion 223 of the second locking member 22 to also extend out of the locking hole 806. In this way, when closing the switch, the locking portions of the two locking members are both located outside the locking hole 806. When opening the switch, the operating mechanism A and the first locking member 21 are released from the matching, and the elastic reset member 23 drives the first locking portion 216 to retract into the housing 8. At the same time, the elastic reset member 23 drives the second locking portion 223 to keep extending out of the locking hole 806. When disassembling, the operating mechanism A drives the second locking member 22 to overcome the elastic force of the elastic reset member 23, so that the second locking portion 223 retracts into the housing 8. In this embodiment, the first locking member 21 is driven by the closing handle 13 and the elastic reset member 23, and the second locking member 22 is driven by the opening handle 11 and the elastic reset member 23.

[0093] A tripping mechanism C is also provided in the housing 8. The tripping mechanism C includes an electromagnetic tripping device 31 and a tripping reset member 32. The electromagnetic tripping device 31 is connected to the control circuit board and driven according to the control signal output by the controller. Figure 4 and 30As shown, the electromagnetic release 31 includes a coil assembly and a moving assembly driven by the coil assembly. The closing lock 14 is rotatably arranged between the closing handle 13 and the electromagnetic release 31. When the electromagnetic release 31 is actuated, the closing lock 14 is driven to rotate by the moving assembly, so that after the closing lock 14 is released from the limit with the closing handle 13, the closing handle 13 moved to the opening position and the tripping mechanism C jointly limit the closing lock 14, that is, the closing handle 13, the closing lock 14 and the tripping reset member 32 cooperate to form a balanced state, at which time the moving assembly can restore the initial position or remain in the extended position.

[0094] Specifically, Figure 1 , 3 As shown in Figures 19, 22 and 23, a pressing portion 131 is provided at one end of the closing handle 13, and the pressing portion 131 slides out from the closing operation hole, and a trigger portion 134 is provided at the other end of the closing handle 13, and the trigger portion 134 is used to control the micro switch and connect or disconnect the solid-state circuit, thereby controlling the connection or disconnection of the solid-state electronic switch. A first driving portion 136 and a second driving portion 138 are protrudingly provided in the middle of the closing handle 13, and a locking groove 137 is connected between the first driving portion 136 and the second driving portion 138. When closing the switch, the locking portion 141 of the closing lock 14 is located in the locking groove 137, thereby limiting the sliding of the closing handle 13 and limiting the closing lock 141. 4 is rotated. When opening and disassembling, the locking portion 141 slides in the direction of the first driving portion 136 and abuts against the first driving portion 136. At this time, the closing handle 13 and the closing locking member 14 are unlocked; the second driving portion 138 cooperates with the first locking member 21 in the locking mechanism B, that is, the second driving portion 138 and the elastic reset member 23 jointly drive the first locking portion 216 of the first locking member 21 to extend out of the locking hole 806 or retract into the housing 8; a first connecting hole 133 and a second connecting hole 132 are opened in the middle of the closing handle 13, and the first connecting hole 133 and the second connecting hole 132 are respectively used to connect with the moving contact 72 and the contact spring 73 in the contact mechanism G.

[0095] In this embodiment, the length of the first connecting hole 133 along the closing direction is greater than the movement path of the moving contact 72 when closing, so that the moving stroke of the closing handle 13 is greater than the moving stroke of the moving contact 72. Furthermore, the second connecting hole 132 is located between the first connecting hole 133 and the pressing portion 131. In the process of pressing the closing handle 13 to the closing position, the displacement of one end of the contact spring 73 connected to the second connecting hole 132 in the closing direction is greater than the straight-line distance between the static contact 71 and the moving contact 72 in the opening position. It can also be understood that, during the closing process, the moving stroke of one end of the contact spring 73 driven by the second connecting hole 132 is equal to the moving stroke of the closing handle 13, and is greater than the distance between the static contact 71 and the moving contact 72 in the opening position.

[0096] Combination Fig. 22 , 23 A specific structure of a closing handle 13 is provided. The closing handle 13 includes an integrally formed first rod body and a second rod body. One end of the first rod body serves as a pressing portion 131. A protruding first driving portion 136 and a second driving portion 138 are provided in the middle of the first rod body. The first driving portion 136 and the second driving portion 138 are spaced apart along the axial direction of the first rod body. The second driving portion 138 is closer to the pressing portion 131. A locking groove 137 is formed between the first driving portion 136 and the second driving portion 138. In this embodiment, the second driving portion 138 is provided between the first driving portion 136 and the second driving portion 138. The part 138 is a boss disposed on opposite sides of the first rod body. An inclined hole is provided on the first rod body near one of the second driving parts 138. The inclined hole serves as a second connecting hole 132 and is used to elastically abut against one end of the contact spring 73. The inclined side wall in the inclined hole serves as a driving surface and is used to connect with one end of the contact spring 73. A reset hole 135 is provided on the end surface of the first rod body away from the pressing part 131. The closing reset member 15 is limitedly disposed in the reset hole 135, and the other end of the closing reset member 15 elastically abuts against the housing 8.

[0097] One end of the second rod body is connected to the side wall of the first rod body, and the second rod body is located adjacent to the side wall of the first driving portion 136. The second rod body is provided with a first connecting hole 133, and one end of the moving contact 72 can pass through the first connecting hole 133 to cooperate with the static contact 71. In this embodiment, the axial direction of the first connecting hole 133 is parallel to the protruding direction of the second driving portion 138. The side wall of the first connecting hole 133 close to the second connecting hole 132 serves as a switch-off limiting surface. When the closing handle 13 is in the opening position, a gap is left between the switch-off limiting surface and one end of the moving contact 72 passing through the first connecting hole 133. When the closing handle 13 is pressed, the closing handle 13 is pressed. In the process of moving from the first connecting hole 133 to the closing position, the driving surface first presses one end of the contact spring 13, so that the end connected to the second connecting hole 132 gradually moves toward the direction close to the static contact 71 (that is, the closing position), and as the contact spring 73 gradually undergoes elastic deformation to drive the moving contact 72 to pass through the first connecting hole 133, one end also gradually approaches the static contact 71. After the moving contact 72 contacts the static contact 71, as the contact spring 73 gradually reaches the maximum elastic deformation, the opening limit surface gradually approaches the moving contact 72 or fits against the moving contact 72; the other end of the second rod body serves as the trigger portion 134 and extends in the direction away from the pressing portion 131.

[0098] A handle portion 111 is provided at one end of the opening handle 11, and the handle portion 111 slides out from the opening operation hole. A protruding first unlocking portion 113 is provided at the other end of the opening handle 11. The first unlocking portion 113 cooperates with the closing lock member 14 to drive the closing lock member 14 to rotate, so that the locking portion 141 of the closing lock member 14 moves from the locking groove 137 to abut against the first driving portion 136; a second unlocking portion 112 is provided in the middle of the opening handle 11, and the second unlocking portion 112 is used to cooperate with the locking mechanism B, that is, Yes, the second unlocking portion 112 is driven to cooperate with the second matching portion 221 of the second locking piece 22. When the opening handle 11 is pulled out to the disassembly position, the second unlocking portion 112 can drive the second locking portion 223 of the second locking piece 22 to retract into the shell 8; at least one positioning portion is provided on the side wall of the opening handle 11, and the positioning portion cooperates with the shell 8 to limit the pulling stroke of the opening handle 11, thereby preventing the opening handle 11 from being separated from the opening operating hole. Preferably, a closing reset piece 12 is provided between one of the positioning portions and the shell 8.

[0099] Combination Fig.24 A specific structure of a trip handle 11 is provided. The trip handle 11 includes an integrally formed handle body. One end of the handle body extends to both sides to form a T-shaped handle portion 111. Preferably, an anti-slip groove is provided on the operating surface of the handle portion 111. The other end of the handle body protrudes to one side to form a first unlocking portion 113 that is approximately hook-shaped. The first unlocking portion 113 is used to cooperate with the lock portion 141 of the closing lock member 14. When the switch is opened, the first unlocking portion 113 pushes the lock portion 141 to release the limit cooperation with the lock portion 141 and the lock groove 137, thereby achieving the release of the limit cooperation between the closing lock member 14 and the closing handle 13. A groove structure is provided on the side wall of the handle body between the handle portion 111 and the first unlocking portion 113. The groove structure serves as a second unlocking portion 112 to cooperate with the second locking member 22 in the locking mechanism B. In this embodiment, the second matching portion 221 of the second locking member 22 can be inserted into the second unlocking portion 112, and the opening axial length of the second unlocking portion 112 is greater than the second matching portion 221, which is used to provide a certain amount of clearance space for the second matching portion 221 to avoid driving the second locking member 22 to unlock when pulling out the opening handle 11; at least one positioning portion is protruding from the middle part of the handle body, and when the opening handle 11 is pulled out, the positioning portion is abutted against the outer shell 8, thereby preventing the opening handle 11 from being completely pulled out of the opening operating hole. In the figure, a first positioning portion 114 and a second positioning portion 115 are protruding from the middle part of the handle body, wherein the protruding height of the first positioning portion 114 is greater than the second protruding height, and the second positioning portion 115 and the inner wall of the operating end 801 are spaced relative to form an installation groove 805 for accommodating the opening reset member 12.

[0100] like Fig.25As shown, a connecting hole 142 is provided in the middle of the closing lock 14, and the closing lock 14 is rotatably assembled in the housing 8 through the connecting hole 142. A locking portion 141 is connected to one end of the closing lock 14, and the locking portion 141 has a certain length for cooperating with the closing handle 13 and the opening handle 11 at the same time. Preferably, the locking portion 141 is perpendicular to the central axis of the connecting hole 142, and a linkage hole is provided at the other end of the closing lock 14, and the central axis of the linkage hole is perpendicular to the central axis of the connecting hole 142, wherein the linkage hole includes an installation area 143 and a matching area 144 that are interconnected, and the inner diameter of the installation area 143 is larger than the matching area 144, and the electromagnetic release 31 is One end of the moving component is slid into the installation area 143 and then slid into the matching area. When the closing handle 13 and the closing lock 14 are limited and matched, the moving component of the electromagnetic release 31 moves along the direction parallel to the central axis of the linkage hole. When the electromagnetic release 31 drives the closing lock 14 to rotate, that is, the part of the moving component with an outer diameter larger than the inner diameter of the matching area 144 drives the closing lock 14 to rotate, so that the closing handle 13 and the trip reset member 32 jointly limit the closing lock 14. At this time, the moving direction of the moving component forms an angle with the central axis of the linkage hole, but the matching area 144 does not affect the movement of the moving component, and the first driving part 136 and the locking part 141 abut against each other.

[0101] Combination Fig.25 A specific structure of a closing lock 14 is provided. The closing lock 14 comprises a strip-shaped connecting portion, one end of which is connected to a straight rod, the straight rod having a certain length and being perpendicular to the strip-shaped connecting portion to form an approximately T-shaped structure, wherein a portion of the straight rod located on one side of the strip-shaped connecting portion serves as a locking portion 141, and the other end of the strip-shaped connecting portion is connected to a straight plate structure, and the central axis of the straight rod is parallel to the plane where the straight plate structure is located, and a linkage hole is opened in the middle of the straight plate structure. The linkage hole in the figure comprises an installation area 143 and a matching area 144 which are interconnected, wherein the installation area 143 is a circular hole with a larger inner diameter, and the matching area 144 is strip-shaped as a whole and extends in a direction away from the locking portion 141 along an axial direction parallel to the strip-shaped connecting portion, so that the linkage hole is formed into a "b" shape as a whole; a connecting hole 142 is opened at one end of the strip-shaped connecting portion close to the straight plate structure, and the central axis of the connecting hole 142 is perpendicular to the plane where the straight plate structure is located, that is, the central axis of the connecting hole 142 is perpendicular to the central axis of the linkage hole.

[0102] Combination Figure 3-19 , 26 and 27 provide a contact mechanism G adapted to this embodiment, the contact mechanism G includes a moving contact 72, a stationary contact 71 and a contact spring 73, Fig. 27In the figure, the moving contact 72 includes a plate-shaped assembly portion 721, a assembly hole is opened in the middle of the assembly portion 721, one end of the assembly portion 721 extends outward to form a moving contact arm 722, and a moving contact point is provided at one end of the moving contact arm 722 away from the assembly portion 721, and the middle part of the moving contact arm 722 can slide through the middle part of the closing handle 13, that is, the moving contact 72 slides through the first connecting hole 133 of the closing handle 13, and the other end of the assembly portion 721 extends to form a connecting arm 723, and the connecting arm 723 is perpendicular to the central axis of the moving contact arm 722, so that the moving contact 72 as a whole presents an L-shaped plate structure, and the connecting arm 723 is connected to the main line through a soft connection.

[0103] The stationary contact 71 is arranged between the operating end 801 and the control circuit board of the control system D. The stationary contact 71 includes a stationary contact plate, one end of which is connected to the wiring assembly 64, and the other end of the stationary contact plate is provided with a stationary contact 71 that cooperates with the moving contact.

[0104] like Figure 3-19 As shown in Figure 26, the contact spring 73 is two torsion springs, each torsion spring includes a twisted portion 732, and the opposite ends of the twisted portion 732 extend outward to form a first elastic arm and a second elastic arm, respectively. The twisted portions 732 of the two torsion springs are arranged in an axial direction, and the two first elastic arms are connected to form a U-shaped elastic arm 731. The U-shaped elastic arm 731 is used to elastically abut against the moving contact arm 722 in the moving contact 72, and one of the second elastic arms is deflected toward the direction of the other second elastic arm and merged to form a Y-shaped elastic arm 733. The length of the Y-shaped elastic arm 733 is greater than the length of the U-shaped elastic arm 731, and the end of the Y-shaped elastic arm 733 is connected to the second connecting hole 132 of the closing handle 13.

[0105] In this embodiment, the electromagnetic release 31 can adopt the existing technology. Figure 4 , 30In the embodiment, the electromagnetic release 31 includes a coil assembly and a moving assembly driven by the coil assembly, wherein the coil assembly includes a coil frame 313 and a coil 314 wound on the outside of the coil frame 313, and a yoke 312 is respectively arranged at both ends of the coil frame 313, and the moving assembly includes a static iron core 315 and a moving iron core 311, wherein the static iron core 315 is fixedly arranged at one end of the coil frame 313, and the moving iron core 311 is slidably arranged in the coil frame 313, and the first end of the moving iron core 311 is spaced opposite to the static iron core 315, and the second end of the moving iron core 311 passes through the yoke 312 and extends out of the coil frame 313, and the moving iron core 311 is slidably arranged in the coil frame 313. The second end of the iron core 311 passes through the linkage hole and is sleeved with a release reset member 32. In the figure, a sliding portion 3112 is formed in the middle of the second end of the moving iron core 311. The outer diameter of the sliding portion 3112 is less than or equal to the inner diameter of the matching area 144, which is convenient for it to be offset into the matching area 144. The second end of the moving iron core 311 forms a blocking portion 3111 to prevent the sliding portion 3112 from falling off from the linkage hole. At the same time, the blocking portion 3111 is also used to drive the closing locking member 14; the release reset member 32 is a section of spring, one end of the release reset member 32 is elastically abutted against the yoke 312, and the other end of the release reset member 32 is elastically abutted against the closing locking member 14. In this embodiment, when the electromagnetic release 31 is not in action, its moving iron core 311 is in an extended state. When it is driven, the moving iron core 311 moves along Fig. 22 The direction of movement from A to B drives the closing locking member 14 to rotate in the opening state.

[0106] like Figure 17-19 As shown in Figures 28 and 29, in the present embodiment, the first locking member 21, the second locking member 22 and the elastic return member 23 of the locking mechanism B are coaxially rotatably assembled, wherein the elastic return member 23 is a torsion spring, and the two ends of the elastic return member 23 are respectively in contact with the first locking member 21 and the second locking member 22.

[0107] A first matching portion 215 is provided on the side of the first locking member 21 facing the closing handle 13, and a first matching groove 214 is connected to one side of the first matching portion 215. A first locking portion 216 is protruded from the side of the first locking member 21 facing away from the closing handle 13. When the closing handle 13 moves to the closing position, the second driving portion 138 abuts against the first matching portion 215 to overcome the elastic force of the elastic reset member 23, so that the first locking portion 216 extends from the locking hole 806. When the closing handle 13 moves to the opening position, the second driving portion 138 slides into the first matching groove 214. Driven by the elastic reset member 23, the first locking member 21 rotates to retract the first locking portion 216 into the housing 8.

[0108] Combination Fig.28A specific structure of a first locking member 21 is provided. The first locking member 21 is in the form of a rod structure as a whole. A first mounting portion is provided at one end of the first locking member 21. An axial hole is provided in the middle of the first mounting portion for rotatably assembling in the housing 8. The other end of the first locking member 21 away from the first mounting portion is bent and extended to one side to form a first locking portion 216. A first mounting boss is protrudingly provided in an area close to the first mounting portion. The first mounting boss is provided with a first connecting groove, and one end of the elastic return member 23 is inserted into the first connecting groove. A first matching groove 214 is provided in the middle of the side wall of the first locking member 21. The first matching groove 214 is located on the side facing away from the first locking portion 216. A first matching portion 215 is protruding from the first locking member 21 facing away from the first locking portion 216, and the first matching portion 215 is connected with a side of the first matching groove 214 away from the first mounting boss.

[0109] The second locking piece 22 is provided with a second matching portion 221 on the side facing the opening handle 11, and the second locking piece 22 is protrudingly provided with a second locking portion 223 on the side facing away from the opening handle 11. When the opening handle 11 is in the original position or the opening position, the second matching portion 221 cooperates and abuts with the second unlocking portion 112. At this time, the second locking piece 22 is driven by the elastic reset piece 23 to make the second locking portion 223 extend from the locking hole 806. When the opening handle 11 is pulled to the disassembly position, the second unlocking portion 112 drives the second locking piece 22 to rotate through the second matching portion 221, so that the second locking portion 223 is retracted into the housing 8.

[0110] Combination Fig.29 A specific structure of a second locking member 22 is provided. The second locking member 22 is generally similar to a rod structure. A second mounting portion 222 is provided at one end of the second locking member 22. An axial hole is provided in the middle of the second mounting portion 222 for coaxial rotation and assembly with the first mounting portion. A second matching portion 221 is formed by extending outward from one side of the second mounting portion 222. The second matching portion 221 is a rod-shaped body, and the end of the second matching portion 221 gradually becomes thinner to facilitate insertion into the second unlocking portion 112. A second locking portion 223 is provided at the other end of the second locking member 22. The second locking portion 223 and the second matching portion 221 are respectively located on opposite sides of the second locking member 22. A second connecting groove 224 is provided in the middle of the second locking member 22, and the other end of the elastic reset member 23 is inserted into the second connecting groove 224.

[0111] like Figure 1 , 3, 20 and 21, in this embodiment, the main line includes a pair of wiring components 64, a pair of busbar clamps 61 and a conductive system F, wherein a pair of wiring components 64 are arranged at the operating end 801, and each wiring component 64 corresponds to a wiring port, and a pair of busbar clamps 61 are arranged at the plug-in end 802. Preferably, each busbar clamp 61 corresponds to a socket, and a pair of busbar clamps 61 are respectively arranged on opposite sides of the plug-in end 802.

[0112] The conductive system F includes a first conductive plate 62 and two second conductive plates 63, and the contact mechanism G is connected to the second conductive plate 63. The first conductive plate 62 is arranged side by side with the control circuit board along the side position in the shell 8, and the two ends of the first conductive plate 62 are respectively connected to a wiring assembly 64 and a busbar clamp 61. Preferably, the board surface of the first conductive plate 62 is perpendicular to the board surface of the control circuit board, thereby saving internal space. Of course, the board surface of the first conductive plate 62 is also parallel to the board surface of the control circuit board, but the first conductive plate 62 overlaps with the edge of the control circuit board, which affects the heat dissipation effect; the control circuit board is respectively connected to the two second conductive plates 63, thereby connecting the solid-state circuit arranged on the control circuit board to the main circuit. In the figure, one second conductive plate 63 is connected to another busbar clamp 61, and another second conductive plate 63 is connected to another wiring assembly 64 through the contact mechanism G, that is, another second conductive plate 63 is connected to the moving contact 72 through a soft connection, and the static contact 71 is connected to two wiring assemblies 64.

[0113] The place where the heat is the highest is where the solid-state switch on the control circuit board is combined with the two second conductive plates 52. The second conductive plate 52 is used instead of the soft connection to connect to the control circuit board. The second conductive plate 52 has a larger contact area, which is beneficial to reduce the heat generation. At the same time, the overall strength of the connection between the second conductive plate 52 and the busbar clamp 22 is better, and the supporting strength is greater during the plugging and unplugging process, reducing the impact on the product. In addition, the second conductive plate 52 has the advantages of mature process of whole-board plug-in soldering, convenient welding positioning, and good strength.

[0114] In this embodiment, if Figure 1 and 21 As shown, a heat dissipation structure E is also provided in the housing 8. The heat dissipation structure E includes a heat conducting plate 5. Each heat conducting plate 5 is arranged on the side of a second conductive plate 63 facing away from the control circuit board. One end of each heat conducting plate 5 is arranged on the surface of the first conductive plate 62. The heat conducting plate 5 transfers the heat between the second conductive plate 63 and the control circuit board to the first conductive plate 62, and then dissipates the heat through the wiring components 64 and the busbar clamp 61 at both ends of the first conductive plate 62, thereby improving the heat dissipation effect.

[0115] Preferably, Fig.21As shown, two second conductive plates 63 are arranged along the same side surface of the control circuit board, so that the overall thickness of the control circuit board, the second conductive plates 63 and the heat conductive plate 5 can be reduced. In this embodiment, the control circuit board includes two first circuit boards 41 and one second circuit board 42. The two first circuit boards 41 are stacked in the housing 8. One of the first circuit boards 41 is provided with a micro switch, and the micro switch is used to turn on or off the solid-state circuit that controls the solid-state electronic switch. The other first circuit board 41 is provided with a power element, etc. The first conductive end 631 of each second conductive plate 63 connects the two first circuit boards 41 together, and the heat conductive plate 5 is attached to the first conductive end 631 of the second conductive plate 63. The first conductive end 631 of each second conductive plate 63 is extended along the same side surface of the same first circuit board 41. Preferably, the first conductive end 631 of each second conductive plate 63 is located between the two first circuit boards 41. In this way, the heat conducting plate 5 is also located between the two first circuit boards 41, which can make full use of the gap between the two first circuit boards 41, avoid increasing the overall thickness, and also facilitate heat dissipation. The second conductive end of one second conductive plate 63 is connected to a busbar clamp 61, and the second conductive end of another second conductive plate 63 is connected to the contact mechanism G, that is, connected to the static contact 71 or the moving contact 72; the second circuit board 42 is arranged between the first circuit board 41 and the plug-in end 802, the second circuit board 42 is connected to one of the first circuit boards 41 and is provided with a signal terminal 43, the signal terminal 43 is located between a pair of busbar clamps 61, and each signal terminal 43 corresponds to a socket of the plug-in end 802, for plug-in wiring. Of course, the control circuit board can also be only one circuit board, or two or more circuit boards can be spliced ​​together.

[0116] Combination Figure 3 , 21 A structure of a heat conducting plate 5 is provided, wherein the two heat conducting plates 5 are in a strip-shaped plate structure as a whole, and the width of the heat conducting plate 5 is preferably greater than or equal to the width of the first conductive end 631 of the second conductive plate 63. One end of each heat conducting plate 5 is bent to form an abutting portion 51 for abutting against the first conductive plate 62, and the other end of each heat conducting plate 5 is kept flush with the first conductive end 631 of each heat conducting plate 5. Of course, the other end of the heat conducting plate 5 may also extend beyond the first conductive end 631. The two split heat conducting plates 5 are conducive to reducing costs.

[0117] Furthermore, an indication hole 803 is provided at the operating end 801 , and the indication hole 803 corresponds to the indicator light provided on the control circuit board. Preferably, a light guide column 804 is provided between the indication hole 803 and the indicator light, and the light guide column 804 transmits the state of the indicator light to the housing 8 .

[0118] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0119] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A plug-in circuit breaker, comprising a housing (8) and a main circuit arranged in the housing (8), wherein the on and off of the main circuit is controlled by a solid-state electronic switch and a contact mechanism (G), wherein the contact mechanism (G) comprises a static contact (71) and a moving contact (72) that cooperate with each other, wherein opposite ends of the housing (8) serve as an operating end (801) and a plug-in end (802), respectively, and the operating end (801) is slidably provided with an operating mechanism (A), Features: The operating mechanism (A) comprises a closing handle (13), an opening handle (11) and a closing locking member (14); the closing handle (13) and the opening handle (11) are respectively slidably arranged with the housing (8); the closing locking member (14) is rotatably assembled and respectively cooperates with the closing handle (13) and the opening handle (11); the contact mechanism (G) further comprises a contact spring (73); the moving contact (72) and the contact spring (73) are respectively rotatably arranged; When the closing handle (13) is pressed to the closing position, the contact spring (73) first drives the moving contact (72) to connect the contact mechanism (G) and provides contact pressure for the moving contact (72), and the closing handle (13) then closes the solid-state electronic switch, and the closing handle (13) and the closing locking member (14) are limitedly matched. When the opening handle (11) is pulled to the opening position, the opening handle (11) drives the closing locking member (14) to release the limiting cooperation with the closing handle (13), so that when the closing handle (13) moves to the opening position, it first disconnects the solid-state electronic switch and then drives the moving contact (72) to disconnect the contact mechanism (G).

2. The plug-in circuit breaker according to claim 1, Features: The stationary contact (71) is arranged in a housing (8) between an operating end (801) and a solid-state electronic switch, and the moving contact (72) is rotatably assembled in the housing (8), and one end of the moving contact (72) passes through the middle of a closing handle (13) and is spaced apart from the stationary contact (71).

3. The plug-in circuit breaker according to claim 1, Features: The moving contact (72), the contact spring (73) and the closing lock member (14) are coaxially rotatably assembled, one end of the contact spring (73) elastically abuts against the moving contact (72), and the other end of the contact spring (73) elastically abuts against the closing handle (13).

4. The plug-in circuit breaker according to claim 3, Features: The contact mechanism (G) further comprises a partition (74), the moving contact (72) and the closing locking member (14) are coaxially rotatably assembled, and the partition (74) is separately arranged between the moving contact (72) and the closing locking member (14).

5. The plug-in circuit breaker according to claim 1, Features: The contact spring (73) includes two torsion springs, each torsion spring includes a twisted portion (732), the opposite ends of the twisted portion (732) respectively extend outward to form a first elastic arm and a second elastic arm, the twisted portions (732) of the two torsion springs are arranged at intervals along the axial direction, the two first elastic arms are connected to form a U-shaped elastic arm (731), the U-shaped elastic arm (731) is elastically abutted against the moving contact (72), one of the second elastic arms is deflected toward the direction of the other second elastic arm and merged to form a Y-shaped elastic arm (733), and the end of the Y-shaped elastic arm (733) is connected to the second connecting hole (132) of the closing handle (13).

6. The plug-in type circuit breaker according to claim 1, Features: A locking hole (806) is provided on the side wall of the housing (8) connected between the operating end (801) and the plugging end (802), and a locking mechanism (B) is rotatably arranged between the locking hole (806) and the operating mechanism (A). The locking mechanism (B) comprises a first locking member (21) and a second locking member (22), wherein the elastic return member (23) is arranged between the first locking member (21) and the second locking member (22) so that the first locking member (21) and the second locking member (22) maintain opposite movement trends. The closing handle (13) drives the first locking member (21) to cooperate with the elastic return member (23), so that the first locking portion (216) of the first locking member (21) extends out of the locking hole (806) or retracts into the housing (8); the opening handle (11) drives the second locking member (22) to cooperate with the elastic return member (23), so that the second locking portion (223) of the second locking member (22) extends out of the locking hole (806) or retracts into the housing (8).

7. The plug-in circuit breaker according to claim 6, Features: The first locking member (21), the second locking member (22) and the elastic return member (23) are coaxially rotatably assembled, and the two elastic arms of the elastic return member (23) are elastically connected to the first locking member (21) and the second locking member (22) respectively.

8. The plug-in type circuit breaker according to claim 6, Features: When closing the switch, the closing handle (13) drives the first locking portion (216) of the first locking member (21) to extend out of the locking hole (806), and the elastic reset member (23) drives the second locking portion (223) of the second locking member (22) to extend out of the locking hole (806). When the switch is opened, the elastic reset member (23) drives the first locking portion (216) to retract into the housing (8) and keeps the second locking portion (223) extending out of the locking hole (806). When pulled out, the opening handle (11) drives the second locking member (22) to retract the second locking portion (223) into the housing (8).

9. The plug-in type circuit breaker according to claim 1, Features: A tripping mechanism (C) is also provided in the housing (8), the tripping mechanism (C) comprising an electromagnetic tripping device (31), the closing locking member (14) being rotatably provided between the electromagnetic tripping device (31) and the closing handle (13), the electromagnetic tripping device (31) driving the closing locking member (14) to rotate when the electromagnetic tripping device (31) is actuated, so that after the closing locking member (14) is released from the limiting cooperation with the closing handle (13), the closing handle (13) moves to the opening position, and the closing locking member (14) is limited together with the tripping mechanism (C).

10. The plug-in circuit breaker according to claim 9, Features: The tripping mechanism (C) further comprises a tripping reset member (32); the electromagnetic tripper (31) comprises a coil assembly and a moving assembly driven by the coil assembly; the closing locking member (14) is provided with a linkage hole, one end of the moving assembly slides through the linkage hole; the tripping reset member (32) is elastically arranged on the moving assembly between the closing locking member (14) and the coil assembly; when the electromagnetic tripper (31) or the opening handle (11) drives the closing locking member (14) to rotate, the closing handle (13), the closing locking member (14) and the tripping reset member (32) maintain a balanced state.

Images