Circuit breaker

Abstract

The utility model relates to the field of low-voltage electric appliances, in particular to a circuit breaker, a major loop structure of the circuit breaker comprises an operating piece, an electromagnetic system, a contact system, an arc extinguishing system and a control system, the operating piece slides in a reciprocating manner to drive the contact system to be closed and opened through the electromagnetic system, and the control system controls the electromagnetic system to act to drive the contact system to be closed and opened; the main loop structure further comprises a sampling device, and when overload and / or short-circuit current flows through the contact system, the electromagnetic system is controlled by the control system to drive the contact system to be disconnected; the circuit breaker is simple in structure and can be suitable for various current protection thresholds.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly to a circuit breaker. Background Art

[0002] Existing circuit breakers, especially intelligent circuit breakers, generally include a short-circuit protection module, an overload protection module, an operating mechanism, and an electric operation module. The short-circuit protection module and the overload protection module are generally set according to different current specifications of the circuit breaker, and the electric operation module realizes remote operation by the cooperation of a motor and a gear. Existing circuit breakers have problems of complex structure, large volume, and poor reliability of short-circuit and overload protection. In addition, the structure for indicating the on-off state of existing circuit breakers occupies a large space. In addition, existing circuit breakers only rely on mechanical indicating structures to indicate the on-off state, with poor reliability. In addition, existing circuit breakers, especially intelligent circuit breakers, lack necessary locking structures to prevent the circuit breaker from being pulled out of the circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet, or other electrical cabinets) when in the closed state and to prevent the circuit breaker from being installed into the circuit breaker installation cabinet when in the closed state. Summary of the Invention

[0003] The purpose of the utility model is to overcome at least one defect of the prior art and provide a circuit breaker with a simple structure and applicable to multiple protection current thresholds.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A circuit breaker includes a housing and a main circuit structure. The main circuit structure includes an operating member slidably arranged on the housing, an electromagnetic system, a contact system, an arc extinguishing system cooperating with the contact system, and a control system connected to the electromagnetic system for control, all of which are arranged inside the housing. The electromagnetic system includes a magnetic generating component and a push rod movably inserted in the middle of the magnetic generating component. The contact system includes a moving contact mechanism and a static contact. Both ends of the push rod are in transmission cooperation with the operating member and the moving contact mechanism respectively. The operating member reciprocates to drive the contact system to close and open through the electromagnetic system, and the control system controls the electromagnetic system to act to drive the contact system to close and open;

[0006] The main circuit structure further includes a sampling device coupled to the contact system and connected to the control system. When an overload and / or short-circuit current flows through the contact system, the electromagnetic system is controlled by the control system to drive the contact system to open.

[0007] Further, the moving contact mechanism is rotatably arranged; the circuit breaker further includes a length direction d1, a width direction d2, and a height direction d3; in the length direction d1, the operating member is arranged at one end of the housing, and the sampling device and the arc extinguishing system are arranged at the other end of the housing; the electromagnetic system and the contact system are sequentially arranged between the operating member and the arc extinguishing system along the length direction d1; the sampling device and the arc extinguishing system are arranged side by side along the height direction d3, and the control system includes a circuit board, and at least a part of the circuit board is arranged side by side with the electromagnetic system along the height direction d3.

[0008] Further, the circuit board is arranged side by side with the contact system and / or the arc extinguishing system along the width direction d2.

[0009] Further, the operating member, the electromagnetic system, and the sampling device are arranged on the same side of the arc extinguishing system in the height direction d3.

[0010] Further, the main circuit structure further includes a first terminal and a third terminal respectively arranged at both ends of the housing along the length direction d1, the contact system is connected in series between the first terminal and the third terminal, the third terminal is arranged side by side with the operating member along the height direction d3, the electromagnetic system, the arc extinguishing system, the sampling device, and the control system are located between the operating member and the first terminal in the length direction d1, and the operating member, the electromagnetic system, the sampling device, and the first terminal are located on the same side of the third terminal and the arc extinguishing system in the height direction d3.

[0011] Further, the sampling device is a manganin shunt, and the first terminal, the sampling device, the moving contact mechanism, the static contact, and the third terminal are sequentially connected in series;

[0012] Alternatively, the sampling device is a transformer, and the first terminal, the moving contact mechanism, the static contact, and the third terminal are sequentially connected in series.

[0013] Further, the main circuit structure further includes a connecting conductor, the static contact is electrically connected to the third terminal through the connecting conductor, the connecting conductor is a conductive plate, and the connecting conductor is arranged side by side with the circuit board of the control system along the width direction d2.

[0014] Further, the control system further includes a first sampling terminal arranged on the circuit board, the first sampling terminal and the connecting conductor are located on one side of the circuit board in the width direction d2, the connecting conductor is in plug-in fit with the first sampling terminal, and the connecting conductor, the first sampling terminal, and the electromagnetic system are arranged side by side along the height direction d3.

[0015] Further, the circuit breaker further includes a secondary loop structure, the secondary loop structure being a direct-through circuit and including a second terminal, a direct-through conductor, and a fourth terminal connected in series in sequence. The second terminal and the first terminal are arranged side by side in the height direction d3, and the fourth terminal and the third terminal are arranged side by side in the width direction d2; the electromagnetic system, the contact system, the arc extinguishing system, and the sampling device are arranged side by side with the direct-through conductor in the height direction d3.

[0016] Further, the control system further includes a second sampling terminal arranged on the circuit board. The direct-through conductor is a direct-through conductive plate, and at least part of the direct-through conductive plate is arranged side by side with the circuit board of the control system in the width direction d2, and this part is located on one side of the circuit board in the width direction d2 and is inserted and matched with the second sampling terminal. The direct-through conductive plate, the second sampling terminal, and the electromagnetic system are arranged side by side in the height direction d3.

[0017] Further, the main loop structure further includes a signal terminal connected to the control system. The first terminal, the signal terminal, and the second terminal are arranged side by side in the height direction d3.

[0018] Further, in the length direction d1, the first terminal and the third terminal are arranged at one end of the circuit breaker, and the operating member is arranged at the other end of the circuit breaker.

[0019] Further, the operating member has a closing position and a tripping position. The ejector rod remains stationary during the process of the operating member moving from the tripping position to the closing position; the main loop structure further includes a triggering mechanism connected to the control system. The triggering mechanism is triggered by the operating member moving to the closing position and sends a first closing signal to the control system. The control system receives the first closing signal and controls the electromagnetic system to drive the contact system to close; when the operating member moves from the closing position to the tripping position, it drives the moving contact mechanism to move through the ejector rod, so that the contact system is disconnected.

[0020] Further, the operating member includes an operating member main body and an operating member connecting portion. One end of the operating member main body protrudes outside the housing for external force operation, and the other end is connected to the operating member connecting portion; one end of the ejector rod is matched with the operating member connecting portion and is arranged to move relatively in the length direction d1.

[0021] Further, the operating member connecting portion includes a connecting portion cavity; the ejector rod includes a front rod body and a front connecting cap. The front connecting cap includes a front cap brim, and the front cap brim protrudes radially on one side of the front rod body along the front rod body; the front connecting cap is movably arranged in the connecting portion cavity, and the side wall of the connecting portion cavity is in transmission cooperation with the front cap brim. When the operating member moves from the closing position to the tripping position, it drives the ejector rod to move to drive the moving contact mechanism to move so that the contact system is disconnected.

[0022] Further, the operating member has a closing position and a tripping position. When it switches between the closing position and the tripping position, it directly drives the ejector rod to move, thereby driving the moving contact mechanism to close and disconnect from the static contact.

[0023] Further, the circuit breaker further includes a front connecting rod connected to the operating member and arranged to move synchronously. One end of the ejector rod is connected to the front connecting rod and is arranged to move relative to it along the length direction d1.

[0024] Further, the front connecting rod includes a front connecting rod cavity and a front connecting rod insertion hole; the ejector rod includes a front rod body and a front connecting cap. The outer diameter of the front connecting cap is larger than that of the front rod body. The front rod body is slidably inserted into the front connecting rod insertion hole, and the outer diameter of the front rod body is adapted to the inner diameter of the front connecting rod insertion hole. The front connecting cap is arranged in the front connecting rod cavity, and the outer diameter of the front connecting cap is larger than the inner diameter of the front connecting rod insertion hole.

[0025] Further, the circuit breaker further includes an indicating member rotatably arranged in the middle of the operating member and having a first indicating position and a second indicating position. The operating member includes an indicating hole for cooperating with the indicating member; when the operating member moves to the closing position, the indicating member is driven by the indicating member driving structure of the circuit breaker to rotate to the first indicating position; when the operating member moves to the tripping position, the indicating member is driven by the indicating member driving structure of the circuit breaker to rotate to the second indicating position.

[0026] Further, the circuit breaker further includes a rear connecting rod. One end of the ejector rod is connected to the operating member for transmission and the other end is connected to the rear connecting rod and moves synchronously. The rear connecting rod is also hinged to the contact support of the moving contact mechanism.

[0027] Further, the rear connecting rod is provided with a rear connecting rod cavity and a rear connecting rod insertion hole. The rear connecting rod insertion hole is arranged on the side wall of the rear connecting rod cavity. The ejector rod includes a rear rod body and a rear connecting cap. The outer diameter of the rear connecting cap is larger than that of the rear rod body. The inner diameter of the rear connecting rod insertion hole is adapted to the outer diameter of the rear rod body and is smaller than the outer diameter of the rear connecting cap. The rear rod body is inserted into the rear connecting rod insertion hole and the rear connecting cap is placed in the rear connecting rod cavity.

[0028] Further, the rear connecting rod is hinged to the contact support through a rear connecting shaft; among the rear connecting rod and the contact support, one of them is provided with the rear connecting shaft to move synchronously with it, and the other is provided with a kidney-shaped hole for cooperating with the rear connecting shaft.

[0029] Further, the main circuit structure further includes an operating member return spring, and the operating member return spring acts on the operating member to make it tend to move to the tripping position.

[0030] Further, the moving contact mechanism includes two groups of moving contacts arranged side by side along the width direction d2.

[0031] Further, the housing further includes a signal window and an operating member mounting hole respectively provided on the same side wall of the housing. The signal window and the operating member mounting hole are arranged side by side in the height direction d3. The circuit breaker further includes an indicating element connected to the control system. The indicating element cooperates with the signal window to indicate the state of the circuit breaker.

[0032] Further, the circuit breaker further includes a first locking member slidably disposed in the housing in the height direction d3 and a first locking member return spring. The first locking member return spring acts on the first locking member to make it tend to move outside the housing and make the first locking protrusion of the first locking member protrude outside the housing. When the first locking protrusion is externally squeezed, the first locking member moves inside the housing. When the circuit breaker is in the open state, the first locking member is driven by the pulled operating member to move inside the housing.

[0033] The circuit breaker further includes an unlocking mechanism. The unlocking mechanism is an unlocking rod. One end of the unlocking rod is directly or indirectly in transmission cooperation with the operating member 2 and the other end is in transmission cooperation with the first locking member.

[0034] Further, the circuit breaker further includes a second locking member rotatably disposed on the housing. The second locking member includes a second locking protrusion. When the circuit breaker is closed, the second locking member is driven by the operating member to rotate forward so that the second locking protrusion protrudes outside the housing. When the circuit breaker is open, the second locking member rotates reversely to make the second locking protrusion move inside the housing.

[0035] Further, when the circuit breaker is open, the second locking member is driven by the operating member moving towards the open position to rotate reversely.

[0036] Further, the circuit breaker further includes a first locking member slidably disposed on the housing in the height direction d3 and a first locking member return spring. The first locking member return spring acts on the first locking member to make it tend to move outside the housing, and the first locking protrusion of the first locking member protrudes outside the housing. When the circuit breaker is in the open state, the first locking member is driven by the pulled operating member to move inside the housing. The second locking member is in transmission cooperation with the first locking member. When the circuit breaker is open, the first locking member is driven by the reversely rotating second locking member to move inside the housing.

[0037] Furthermore, the electromagnetic system is a magnetic holding system; the magnetic generating assembly includes a coil assembly, a yoke and a permanent magnet arranged around the coil assembly, the permanent magnet is sleeved on the outer side of the middle part of the coil assembly and is located between the two electromagnetic coils of the coil assembly; the electromagnetic system also includes a moving iron core slidably arranged in the middle part of the coil assembly, the moving iron core is connected to the push rod and is arranged to move synchronously, and the two ends of the push rod protrude on both sides of the axial direction of the coil assembly respectively; the electromagnetic system also includes a first static iron core and a second static iron core arranged relatively to each other along the axial direction of the coil assembly, when one end of the moving iron core is attracted to the first static iron core, the push rod is in the first position, and when the moving iron core is attracted to the second static iron core, the push rod is in the second position;

[0038] The push rod comprises a front push rod and a rear push rod, one end of the front push rod is inserted in the moving iron core and the other end is transmission connected to the operating member, and one end of the rear push rod is inserted in the moving iron core and the other end is transmission connected to the moving contact mechanism.

[0039] Furthermore, the length a of the shell is 100-150 mm, the width b is 10-60 mm, and the height c is 38-45 mm.

[0040] Furthermore, the width b of the shell is 10 mm, 15 mm, 20 mm, 30 mm or 60 mm.

[0041] The circuit breaker of the utility model realizes manual and electric opening and closing operations through an operating member, an electromagnetic system, and a control system, and has a simple structure and is easy to operate; the electromagnetic system serves as both a power mechanism for driving the contact system to close and disconnect, and a mechanism for realizing overload and / or short-circuit protection. Compared with the existing circuit breaker, the bimetallic element for realizing overload protection and / or the electromagnetic release for realizing short-circuit protection can be eliminated, which is beneficial to reducing the number of components of the circuit breaker, simplifying the structure of the circuit breaker, providing more space for the layout of various components of the circuit breaker, and further facilitating reducing the overall size of the circuit breaker; the internal layout is reasonable and compact, which is beneficial to further reducing the overall size of the circuit breaker.

[0042] In addition, the middle part of the operating member on which the indicator is rotatably arranged improves the compactness of the structure and saves the internal space of the circuit breaker.

[0043] In addition, the signal window is used to indicate the state of the circuit breaker, thereby improving the reliability and accuracy of the indication.

[0044] In addition, the first locking member prevents the circuit breaker from being pulled out of the circuit breaker installation cabinet in the closed state, ensuring the safety, stability and continuity of electricity use; the second locking member prevents the circuit breaker from being installed into the circuit breaker installation cabinet in the closed state, ensuring the personal safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1It is a schematic structural diagram of the circuit breaker of the present utility model, showing at least the structure of the housing;

[0046] Figure 2 It is a projection view of the circuit breaker of the present utility model, showing the structure of the operating system of the first embodiment;

[0047] Figure 3 It is a schematic structural diagram of the operating system of the first embodiment of the present utility model;

[0048] Figure 4 It is an exploded view of the operating system of the first embodiment of the present utility model;

[0049] Figure 5 It is a sectional view of the operating system of the first embodiment of the present utility model, showing the process of the operating system of the first embodiment performing a closing operation;

[0050] Figure 6 It is a projection view of the circuit breaker of the present utility model, showing the structure of the operating system of the second embodiment;

[0051] Figure 7 It is a schematic structural diagram of the operating system of the second embodiment of the present utility model;

[0052] Figure 8 It is another schematic structural diagram of the operating system of the second embodiment of the present utility model;

[0053] Figure 9 It is a schematic sectional view of the operating system of the second embodiment of the present utility model;

[0054] Figure 10 It is an exploded view of the operating system of the second embodiment of the present utility model;

[0055] Figure 11 It is a schematic diagram showing the cooperation relationship between the front link and the second locking member and the state of the first locking member when the circuit breaker of the present utility model is in the closed state;

[0056] Figure 12 It is a schematic diagram showing the cooperation relationship between the front link and the second locking member and the state of the first locking member when the circuit breaker of the present utility model is in the open state and the operating member is pulled out.

[0057] Explanation of reference numerals

[0058] Housing 1, mounting guide structure 1-1, first jack 1-20, second jack 1-21, signal jack 1-3, signal window 1-4, third jack 1-50, fourth jack 1-51, operating member mounting hole 1-6;

[0059] Operating part 2, operating part main body 2b, operating part connecting part 2c, connecting part jack 2-0c, connecting part cavity 2-1c, operating part trigger part 2-0c, operating part mating part 2p, indicating hole 2-1, installation cavity 2-2, operating part shaft groove 2-3, operating part shaft hole 2-4;

[0060] Operating mechanism 3, electromagnetic system 3-0, magnetic generating component 3-0m, coil component 3-01, moving iron core 3-02, yoke 3-03, permanent magnet 3-04, ejector rod 3-05, front ejector rod 3-050, front rod body 3-0500, front connecting cap 3-0501, rear ejector rod 3-051, rear rod body 3-0510, rear connecting cap 3-0511, front connecting rod 3-1, front connecting rod driving part 3-11, front connecting rod cavity 3-110, front connecting rod jack 3-111, front connecting rod connecting part 3-12, front connecting rod first transition surface 3-121, front connecting rod limiting surface 3-122, front connecting rod second transition surface 3-123, front connecting rod connecting arm 3-120, front connecting rod connecting hole 3-1200, rear connecting rod 3-2, rear connecting rod cavity 3-20, rear connecting rod jack 3-21, rear connecting rod connecting hole 3-22, front connecting shaft 3-31, rear connecting shaft 3-32;

[0061] Contact system 4, moving contact mechanism 4-1, contact support 4-10, support connecting hole 4-100, moving contact 4-11, moving contact shaft 4-12, static contact 4-2;

[0062] Third terminal 5-0, fourth terminal 5-1;

[0063] Arc extinguishing system 6;

[0064] Sampling device 7;

[0065] First terminal 8-0, second terminal 8-1;

[0066] Auxiliary circuit structure 9;

[0067] First sampling terminal 10-0, second sampling terminal 10-1;

[0068] Control system 11, circuit board 11p, first sampling terminal 11-0, second sampling terminal 11-1;

[0069] Signal terminal 12;

[0070] Indicator 13, indicating part 13-0, indicator connecting part 13-1, indicator mounting part 13-2, first actuated part 13-30 of indicator, second actuated part 13-31 of indicator;

[0071] First locking part 14, first locking protrusion 14-1, actuated part 14-2 of first locking part;

[0072] Second locking member 15, second locking projection 15-0, rear arm 15-1 of second locking member, mounting portion 15-2 of second locking member, front arm 15-3 of second locking member, engaging portion 15-4 of second locking member, transition surface 15-41 of engaging portion, limiting surface 15-40 of engaging portion;

[0073] Reset spring 16 of first locking member;

[0074] Trigger mechanism 17;

[0075] Reset spring 18 of operating member;

[0076] Unlocking mechanism 19;

[0077] Connecting conductor 20. Detailed implementation manners

[0078] The following embodiments given in conjunction with the accompanying drawings further illustrate the detailed implementation manners of the circuit breaker of the present utility model. The circuit breaker of the present utility model is not limited to the descriptions of the following embodiments.

[0079] As Figure 1-2As shown in Figures 6 and 7, the circuit breaker of the utility model includes a housing 1 and a main circuit structure, and the main circuit structure includes an operating member 2 slidably arranged on the housing 1, and an operating mechanism 3, a contact system 4, an arc extinguishing system 6, and a control system 11, which are respectively arranged in the housing 1. The operating member 2 has an opening position and a closing position, and the operating member 2 switches between the opening position and the closing position by reciprocating sliding. The operating mechanism 3 includes an electromagnetic system 3-0, and the electromagnetic system 3-0 includes a magnetic generating component 3-0m and a top rod 3-05 movably inserted in the middle of the magnetic generating component 3-0m, and the top rod 3-05 has a first position and a second position and switches between the first position and the second position by reciprocating movement. The contact system 4 includes a moving contact mechanism 4-1 and a stationary contact 4-2 used in conjunction with each other. The moving contact mechanism 4-1 has a closed position and an open position. The moving contact mechanism 4-1 is closed with the stationary contact 4-2 when in the closed position (i.e., the contact system 4 is in the closed state), and is disconnected from the stationary contact 4-2 when in the open position (i.e., the contact system 4 is in the open state). One end of the top rod 3-05 is connected to the moving contact mechanism 4-1 by transmission. The top rod 3-05 switches between the first position and the second position to drive the moving contact mechanism 4-1 to switch between the closed position and the open position. The arc extinguishing system 6 is used in conjunction with the contact system 4 to extinguish the arc generated when the contact system 4 is closed and opened. The operating member 2 switches between the closing position and the opening position and drives the moving contact mechanism 4-1 to switch between the closing position and the opening position through the electromagnetic system 3-0, so that the contact system 4 switches between the closing state and the opening state, that is, the circuit breaker of the utility model switches between the closing state and the opening state. The electromagnetic system 3-0 works under the control of the control system 11 and drives the top rod 3-05 to switch between the first position and the second position, so that the top rod 3-05 drives the moving contact mechanism 4-1 to switch between the closing position and the opening position. Obviously, in the circuit breaker of the utility model, the closing position of the operating member 2, the first position of the top rod 3-05, the closing position of the moving contact mechanism 4-1, the closing state of the contact system 4, and the closing state of the circuit breaker correspond to each other, and the opening position of the operating member 2, the second position of the top rod 3-05, the opening position of the moving contact mechanism 4-1, the opening state of the contact system, and the opening state of the circuit breaker correspond to each other. Furthermore, both ends of the push rod 3-05 are respectively in transmission cooperation with the operating member 2 and the moving contact mechanism 4-1.

[0080] Specifically, Figure 1-2 As shown in Figures 6, 11-12, the two ends of the push rod 3-05 are respectively connected to the operating member 2 and the moving contact mechanism 4-1; one end of the operating member 2 is inserted into the shell 1 and the other end protrudes from the outside of the shell 1 for external force operation. The external force can be achieved by pressing and pulling the operating member 2, thereby driving the contact system 4 to close and open (that is, driving the circuit breaker to close and open) through the operating mechanism 3.

[0081] Specifically, Figure 2-8 As shown in Figures 10, the moving contact mechanism 4-1 includes a contact support 4-10 and a moving contact 4-11 carried on the contact support 4-10. Further, the moving contact mechanism 4-1 is rotatably arranged by the contact support 4-10. Further, the moving contact mechanism 4-1 also includes a contact spring (not shown in the drawings of the specification); the contact support 4-1 is rotatably arranged on the housing 1 by the moving contact shaft 4-12, and the moving contact 4-11 and the contact support 4-10 are relatively rotatably arranged, thereby allowing the moving contact 4-11 to continue to rotate a certain angle relative to the moving contact 4-11 after the moving contact 4-11 and the static contact 4-2 are closed, so that the contact spring applies a force to the moving contact 4-11 to press the static contact 4-2 to ensure reliable contact between the two.

[0082] As another embodiment, the movable contact mechanism 4 - 1 is arranged to move as a whole, and the movable contact mechanism 4 - 1 switches between a closed position and an open position by reciprocating movement to close and open with the stationary contact 4 - 2 .

[0083] Furthermore, the moving contact mechanism 4-1 is provided with two groups of moving contacts 4-11 arranged in parallel, which can effectively reduce the electric repulsion between the moving / static contacts and improve the current carrying capacity.

[0084] Furthermore, the operating mechanism 3 also includes a rear connecting rod 3-2, which is connected to one end of the top rod 3-05 of the electromagnetic system 3-0 and is hinged to the contact support 4-11. The axis of the hinge shaft between the rear connecting rod 3-2 and the contact support 4-11 is arranged parallel to the rotation axis of the moving contact mechanism 4-1 and spaced apart.

[0085] Specifically, the rear connecting rod 3-2 is provided with a rear connecting rod cavity 3-20 and a rear connecting rod socket 3-21, the rear connecting rod socket 3-21 is arranged on the side wall of the rear connecting rod cavity 3-20 (the side wall is close to the magnetic generating component 3-0m of the magnetic holding system 3-0), the rear rod body 3-0510 of the push rod 3-05 is inserted into the rear connecting rod socket 3-21 and the outer diameter of the rear rod body 3-0510 is adapted to the inner diameter of the rear connecting rod socket 3-21, the rear connecting cap 3-0511 of the push rod 3-05 is arranged in the rear connecting rod cavity 3-20 and the rear connecting rod The outer diameter of the connecting cap 3-0511 is larger than the inner diameter of the rear connecting rod socket 3-21 and the outer diameter of the rear rod body 3-0510; the rear connecting rod 3-2 includes a first rear connecting rod opening and a second rear connecting rod opening arranged on one side thereof, the first rear connecting rod opening is connected to the rear connecting rod cavity 3-20, the second rear connecting rod opening is connected to the rear connecting rod socket 3-21, the rear rod body 3-0510 enters the rear connecting rod socket 3-21 through the second rear connecting rod opening, and the rear connecting cap 3-0511 enters the rear connecting rod cavity 3-20 through the first rear connecting rod opening.

[0086] Specifically, the rear link 3-2 is hinged to the contact support 4-11 through the rear connecting shaft 3-32. Further, in the rear link 3-2 and the contact support 4-10, the connecting shaft 3-32 is arranged on one to move synchronously therewith, and the other is provided with a kidney-shaped hole that cooperates with the rear connecting shaft 3-32. Further, the rear link 3-2 is provided with a rear link connection hole 3-22 for inserting the rear connecting shaft 3-32 and adapted thereto. The rear connecting shaft 3-32 is inserted into the rear link connection hole 3-22 and moves synchronously with the rear link 3-2. The contact support 4-11 is provided with a kidney-shaped hole, and this kidney-shaped hole is a support connection hole 4-100 for inserting the rear connecting shaft 3-32.

[0087] As other embodiments, the ejector rod 3-05 can also be directly hinged to the contact support 4-11, and the detailed connection manner therebetween can be realized by the prior art and will not be elaborated herein.

[0088] Further, the main circuit structure further includes a sampling device 7 coupled to the contact system 4 (that is, coupled to the moving contact mechanism 4-1). The sampling device 7 is used to collect the current signal flowing through the contact system 4 and is connected to the control system 11. When an overload and / or short-circuit current flows through the contact system 4 (that is, the control system 11 detects an overload and / or short-circuit current through the sampling device 7), the control system 11 controls the electromagnetic system 3-0 to operate and drives the ejector rod 3-05 to move from the first position to the second position, thereby driving the moving contact mechanism 4-1 to move from the closed position to the open position. In the circuit breaker of the present invention, the electromagnetic system 3-0 serves both as a power mechanism for driving the contact system 4 to close and open and as a mechanism for realizing overload and / or short-circuit protection. Compared with the existing circuit breaker, the bimetallic element for realizing overload protection and / or the electromagnetic tripping mechanism for realizing short-circuit protection can be cancelled, which is beneficial to reducing the number of components of the circuit breaker, simplifying the structure of the circuit breaker, providing a larger space for the layout of each component of the circuit breaker, and further being beneficial to reducing the overall size specification of the circuit breaker. In the circuit breaker of the present invention, when an overload and short-circuit current flows through the contact system 4, the control system 11 controls the electromagnetic system 3-0 to operate and drives the ejector rod 3-05 to move from the first position to the second position. That is, the electromagnetic system 3-0 serves as both an overload protection and a short-circuit protection mechanism at the same time.

[0089] Specifically, the sampling device 7 is a manganin shunt connected in series with the contact system 4 (that is, connected in series with the moving contact mechanism 4-1); or, the sampling device 7 is a current transformer coupled to the contact system 4 (that is, coupled to the moving contact mechanism 4-1). For example, the current transformer can be coupled to the contact system 4 by sleeving on a conductor connected in series with the contact system 4. In the circuit breaker of the present invention, the sampling device 7 preferably adopts a manganin shunt.

[0090] Furthermore, the main circuit structure further includes a first terminal 8-0 and a third terminal 5-0, and the first terminal 8-0, the contact system 4 and the third terminal 5-0 are connected in series in sequence. Furthermore, the third terminal 5-0, the static contact 4-2, the moving contact mechanism 4-1 and the first terminal 8-0 are connected in series in sequence.

[0091] Specifically, the first terminal 8-0 is the incoming terminal of the main circuit structure, and the third terminal 5-0 is the outgoing terminal of the main circuit structure; the sampling device 7 is a manganese copper shunt; the third terminal 5-0, the static contact 4-2, the moving contact mechanism 4-1, the sampling device 7 and the first terminal 8-0 are connected in series in sequence; or, the third terminal 5-0, the sampling device 7, the static contact 4-2, the moving contact mechanism 4-1 and the first terminal 8-0 are connected in series in sequence.

[0092] Furthermore, the main circuit structure also includes a connecting conductor 20, and the static contact 4-2 is electrically connected to the third terminal 5-0 via the connecting conductor 20.

[0093] Furthermore, the main circuit structure also includes a signal terminal 12 connected to the control system 11, and the control system 11 communicates with external equipment through the signal terminal 12. For example, the control system 11 transmits data through the signal terminal 12 and receives external control signals (remote closing signal and remote opening signal) through the signal terminal 12.

[0094] Furthermore, the circuit breaker of the utility model also includes a secondary circuit structure 9 arranged in the housing 1, and the secondary circuit structure 9 is a straight-through circuit. The so-called "straight-through circuit" refers to a circuit structure in which there is no operable breakpoint in the circuit (for example, there is no breakpoint realized by the moving contact and the static contact, the breakpoint is closed when the moving contact and the static contact are closed, and the breakpoint is disconnected when the moving contact and the static contact are disconnected) and it can be directly connected to the external circuit. Further, the secondary circuit structure 9 includes a second terminal 8-1, a straight-through conductor and a fourth terminal 5-1 connected in series in sequence. Further, the straight-through conductor is a conductive plate or a soft conductor. It should be pointed out that the circuit breaker of the utility model can only be provided with a main circuit structure, and the circuit breaker is a single-phase circuit breaker (that is, a 1P type circuit breaker); the circuit breaker of the utility model can also be provided with a main circuit structure and a secondary circuit structure at the same time, and the circuit breaker is a two-phase circuit breaker (that is, a 1P+1N type circuit breaker). In addition, multiple circuit breakers of this embodiment can be arranged side by side, and the operating parts of the circuit breakers and the operating system can cooperate with each other to realize a two-phase (2P type circuit breaker) or multi-phase (3P or 4P) circuit breaker.

[0095] Specifically, the second terminal 8 - 1 is an incoming terminal of the secondary loop structure 9 , and the fourth terminal 5 - 1 is an outgoing terminal of the secondary loop structure 9 .

[0096] like Figure 2 ,6 As shown, the control system 11 includes a circuit board 11p.

[0097] Furthermore, the control system 11 further includes a first sampling terminal 11-0 connected to the circuit board 11p. The first sampling terminal 11-0 is electrically connected to the connection conductor 20 to detect the voltage signal, current signal, and on / off state of the main circuit structure, so as to judge the current state of the circuit breaker of the present utility model. Further, the connection conductor 20 is a conductive plate. The first sampling terminal 11-0 is arranged on the circuit board 11p, and the conductive plate is in plug-in fit with the first sampling terminal 11-0.

[0098] Furthermore, the control system 11 further includes a second sampling terminal 11-1 electrically connected to the circuit board 11p and the through conductor respectively, for detecting the voltage signal and current signal of the secondary circuit structure. Further, the through conductor is a conductive plate. The second sampling terminal 11-1 is arranged on the circuit board 11p, and the conductive plate is in plug-in fit with the second sampling terminal 11-1.

[0099] As Figure 2-10 shown, the electromagnetic system 3-0 is a magnetic latching system.

[0100] Furthermore, the magnetic component 3-0m includes a coil assembly 3-01, a yoke 3-03 arranged around the coil assembly 3-01, and a permanent magnet 3-04. The permanent magnet 3-04 is sleeved outside the middle of the coil assembly 3-01 and is located between two electromagnetic coils of the coil assembly 3-01. The electromagnetic system 3-0 further includes a moving iron core 3-02 slidably arranged in the middle of the coil assembly 3-01. The moving iron core 3-02 is connected to the ejector rod 3-05 and is arranged to move synchronously. Both ends of the ejector rod 3-05 protrude from both axial sides of the coil assembly 3-01. The electromagnetic system 3-0 further includes a first static iron core and a second static iron core arranged oppositely along the axial direction of the coil assembly 3-01. When one end of the moving iron core 3-02 is attracted to the first static iron core, the ejector rod 3-05 is in the first position. When the moving iron core 3-02 is attracted to the second static iron core, the ejector rod 3-05 is in the second position. The ejector rod 3-05 reciprocates along the axial direction of the coil assembly 3-01 and switches between the first position and the second position. Further, the yoke 3-03 is of a square frame structure, and the first static iron core and the second static iron core are formed by a pair of side walls of the yoke 3-03. Further, the yoke 3-03 includes a yoke seat of a U-shaped structure and a yoke end plate. The open end of the U-shaped structure of the yoke seat is connected to the yoke end plate. One of the yoke end plate and the bottom plate of the U-shaped structure of the yoke seat serves as the first static iron core and the other serves as the second static iron core.

[0101] It should be pointed out that the electromagnetic system 3-0 can also adopt other structural types of existing magnetic holding systems. For example, the difference between an existing magnetic holding system and this embodiment is that it includes two groups of permanent magnets, and the two groups of permanent magnets are respectively arranged on the outside of the axial ends of the coil assembly 3-01, and the electromagnetic coil of the coil assembly 3-01 is located between the two groups of permanent magnets.

[0102] Furthermore, the push rod 3-05 includes a front push rod 3-050 and a rear push rod 3-051, one end of the front push rod 3-050 is inserted in the moving iron core 3-02 and the other end protrudes outside the axial end of the electromagnetic coil and is connected to the operating member 2, and one end of the rear push rod 3-051 is inserted in the moving iron core 3-02 and the other end protrudes outside the axial end of the electromagnetic coil and is connected to the moving contact mechanism 4-1.

[0103] Specifically, the front push rod 3-05 includes a front rod body 3-0500 and a front connecting cap 3-0501, one end of the front rod body 3-0500 is connected to the front connecting cap 3-0501 and the other end is connected to the moving iron core 3-02 (for example, one axial end of the moving iron core 3-02 is inserted into the moving iron core 3-02); the rear push rod 3-051 includes a rear rod body 3-0510 and a rear connecting cap 3-0511, one end of the rear rod body 3-0510 is connected to the rear connecting cap 3-0511 and the other end is connected to the moving iron core 3-02 (for example, the other axial end of the moving iron core 3-02 is inserted into the moving iron core 3-02). Furthermore, the front rod body 3-0500 and the front connecting cap 3-0501 are an integrated structure or a detachable split structure; the rear rod body 3-0510 and the rear connecting cap 3-0511 are an integrated structure or a detachable split structure.

[0104] like Figure 2 , 6 As shown in Figures 11-12, the circuit breaker of the utility model also includes a first locking piece 14 and a first locking piece reset spring 16 which are slidably arranged in the housing 1 along the direction d3. The first locking piece reset spring 16 acts on the first locking piece 14 to make it have a tendency to move to the outside of the housing 1 and make the first locking protrusion 14-1 of the first locking piece 14 protrude outside the housing 1. The first locking piece 14 moves toward the inside of the housing 1 when the first locking protrusion 14-1 is squeezed by an external force (that is, when the first locking protrusion 14-1 is squeezed by an external force, the first locking piece 14 is driven to move toward the inside of the housing 1 as a whole); when the circuit breaker is in the open state, the first locking piece 14 is driven by the pulled operating piece 2 to move toward the inside of the housing 1, that is, when the circuit breaker is in the open state, the operating piece 2 is pulled in the open position to drive the first locking piece 14 to move toward the inside of the housing 1.

[0105] When the circuit breaker of the present utility model is actually installed in a circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet or other electrical cabinets), the first locking protrusion 14-1 moves towards the inside of the housing 1 under the extrusion of the structure of the circuit breaker installation cabinet, which will not affect the installation of the circuit breaker into the designated position of the circuit breaker installation cabinet. After the circuit breaker is installed in the designated position and in place, the first locking protrusion 14-1 will be opposite to the first locking hole provided at the designated position of the circuit breaker installation cabinet and move towards the outside of the housing 1 and insert into the first locking hole, so as to be in limit cooperation with the circuit breaker installation cabinet, so that the circuit breaker will not be pulled out of the designated position of the circuit breaker installation cabinet in the closed state, which not only ensures the personal safety of the operator, but also ensures the reliability and stability of power use.

[0106] As Figure 5 , 11 -12 shows, the circuit breaker of the present utility model further includes a second locking member 15 rotatably provided in the housing 1, and the second locking member 15 includes a second locking protrusion 15-0; when the operating member 2 moves from the open position to the closed position, the second locking member 15 is directly or indirectly driven by the operating member 2 to rotate forward so that the second locking protrusion 15-0 moves towards the outside of the housing 1; when the operating member 2 moves from the closed position to the open position, the second locking member 15 rotates reversely so that the second locking protrusion 15-0 moves towards the inside of the housing 1; when the operating member 2 is in the closed position, the operating member 2 directly or indirectly restricts the reverse rotation of the second locking member 15.

[0107] The second locking member 15, when the operating member 2 moves from the open position to the closed position, is driven by the operating member 2 to rotate forward so that the second locking protrusion 15-0 moves towards the outside of the housing 1, and the second locking protrusion 15-0 is used for limit cooperation with the structure of the circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet or other electrical cabinets), thereby preventing the circuit breaker of the present utility model from being installed in the circuit breaker installation cabinet in the closed state and ensuring the personal safety of the operator; after the circuit breaker of the present utility model is installed in the circuit breaker installation cabinet in the open state and in place, the second locking protrusion 15-0 protruding outside the housing 1 is also used to be opposite to the second locking hole of the circuit breaker installation cabinet and extend into it, and the second locking protrusion 15-0 is in limit cooperation with the structure of the circuit breaker installation cabinet. When the operating member 2 is in the closed position, the front link 3-1 is in limit cooperation with the second locking member 15 to prevent its reverse rotation, thereby preventing the circuit breaker of the present utility model from being pulled out of the circuit breaker installation cabinet in the closed state, which not only ensures the personal safety of the operator, but also ensures the stability and reliability of power use; when the operating member 2 moves from the closed position to the open position, the second locking member 15 rotates reversely so that the second locking protrusion 15-0 moves towards the inside of the housing 1, and the second locking protrusion 15 withdraws from the second locking hole, thereby releasing the limit cooperation with the circuit breaker installation cabinet, and then the second locking member 15 will not affect the removal of the circuit breaker of the present utility model from the circuit breaker installation cabinet.

[0108] Furthermore, the second locking projection 15-0 is a square projection, so as to prevent the second locking projection 15-0 from being squeezed and damaged or deformed when the operating member 2 is in the closing position, thus avoiding the situation that the circuit breaker of the present utility model is directly installed in the circuit breaker installation cabinet.

[0109] Furthermore, when the operating member 2 moves from the closing position to the opening position, the second locking member 15 is driven directly or indirectly by the operating member 2 to rotate reversely, so that the second locking projection 15-0 moves towards the inside of the housing 1. Further, the second locking member 15 is driven by the operating member 2 pulled at the opening position to rotate reversely, and the first locking member 14 is driven by the reversely rotating second locking member 15 to move towards the inside of the housing 1 when the operating member 2 at the opening position is pulled; that is, when the operating member 2 is pulled at the opening position, the operating member 2 drives the second locking member 15 to rotate reversely at the same time, and the second locking member 15 drives the first locking member 14 to move towards the inside of the housing 1 at the same time.

[0110] As another embodiment, the circuit breaker of the present utility model includes a second locking member return spring that acts on the second locking member 15 to make it have a tendency to rotate reversely. When the operating member 2 moves from the closing position to the opening position, the operating member 2 no longer restricts the reverse rotation of the second locking member 15, and the second locking member return spring drives the second locking member 15 to rotate reversely.

[0111] The circuit breaker of the present utility model can be provided with both the first locking member 14 and the second locking member 15, or only the first locking member 14 or the first locking member 15 can be provided.

[0112] As shown in Figure 3-4 Figs. 7-12, the circuit breaker of the present utility model further includes an indicating member 13 provided in the middle of the operating member 2 and having a first indicating position and a second indicating position. The operating member 2 includes an indicating hole 2-1 for cooperating with the indicating member 13; when the operating member 2 moves to the closing position, the indicating member 13 is driven by the indicating member driving structure to rotate to the first indicating position; when the operating member 2 moves to the opening position, the indicating member 13 is driven by the indicating member driving structure to rotate to the second indicating position; that is, the first indicating position and the second indicating position of the indicating member 13 correspond to the closing position and the opening position of the operating member 2 respectively, and correspond to the closing state and the opening state of the circuit breaker of the present utility model respectively. The indicating member 13 is provided in the middle of the operating member 2, which is beneficial to improving the structural compactness of the circuit breaker and reducing the overall installation space required for the circuit breaker.

[0113] Further, the indicating member 13 includes an indicating portion 13-0, an indicating member connecting portion 13-1, and an indicating member mounting portion 13-2 that are connected in sequence, as well as a closing actuating portion 13-30 and a tripping actuating portion 13-31 provided on the indicating member mounting portion 13-2; the indicating portion 13-0 of the indicating member 13 is used in cooperation with the indicating hole 2-1 of the operating member 2, and the indicating member 13 is rotatably mounted on the operating member 2 through the indicating member mounting portion 13-2, and the closing actuating portion 13-30 and the tripping actuating portion 13-31 are arranged in sequence along the rotation direction of the indicating member mounting portion 13-2; the indicating member driving structure is realized by the housing 1 (for example, a driving protrusion provided on the housing 1, and the driving protrusion is inserted between the closing actuating portion 13-30 and the tripping actuating portion 13-31); when the operating member 2 moves to the closing position, the closing actuating portion 13-0 is pressed by the indicating member driving structure to rotate the indicating member 13 to the first indicating position; when the operating member 2 moves to the tripping position, the tripping actuating portion 13-1 is pressed by the low pressure of the indicating member driving structure to rotate the indicating member 13 to the second indicating position.

[0114] As another embodiment, the indicating member 13 does not have a closing actuating portion 13-30 and a tripping actuating portion 13-31, but only an indicating member actuating portion is provided on the indicating member mounting portion 13-2; correspondingly, the indicating member driving structure includes two indicating member driving protrusions, one is a closing driving protrusion and the other is a tripping driving protrusion, and the indicating member actuating portion is inserted between the two indicating member driving protrusions; when the operating member 2 moves to the closing position, the closing driving protrusion presses the indicating member actuating portion to rotate the indicating member 13 to the first indicating position; when the operating member 2 moves to the tripping position, the tripping driving protrusion presses the indicating member actuating portion to rotate the indicating member 13 to the second indicating position.

[0115] As Figure 1 shown, the housing 1 further includes an operating member mounting hole 1-6 for the operating member 2 to be inserted therein, a first jack 1-20 for cooperating with the first terminal 8-0, a second jack 1-21 for cooperating with the second terminal 8-1, a signal jack 1-3 for cooperating with the signal terminal 12, a third jack 1-50 for cooperating with the third terminal 5-0, and a fourth jack 1-51 for cooperating with the fourth terminal 5-1.

[0116] As Figure 1 shown, the housing 1 further includes a signal window 1-4, and the circuit breaker further includes an indicating element connected to the control system 11. The indicating element cooperates with the signal window 1-4 to indicate the state of the circuit breaker, such as the closing and tripping states, fault state, communication state, etc. of the circuit breaker; the signal window 1-4 and the operating member mounting hole 1-6 are provided on the same side wall of the housing 1. Further, the indicating element is an indicator light.

[0117] As Figure 2 、 6As shown in FIGS. 11-12, the housing 1 is further provided with a first opening for the first locking projection 14-1 of the first locking member 14 to pass through and a second opening for the second locking projection 15-0 of the second locking member 15 to pass through. Further, the first opening and the second opening are the same opening.

[0118] As Figure 1 shown, the housing 1 further includes an installation guiding structure 1-1, which is used to cooperate with the guiding structure on the circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet or other electrical cabinets) when the circuit breaker of the present invention is installed in the circuit breaker installation cabinet, so that the circuit breaker of the present invention can be installed in place in the correct posture. Further, the installation guiding structure 1-1 is a guiding rib structure.

[0119] As Figure 1-2 、6 shows a layout mode of the circuit breaker of the present invention.

[0120] The circuit breaker of the present invention includes a length direction d2, a width direction d2 and a height direction d3, that is, the length direction, width direction and height direction of the circuit breaker are the length direction d1, width direction d2 and height direction d3 respectively, and the length direction d1, width direction d2 and height direction d3 are perpendicular to each other. In the length direction d1, the operating member 2 is arranged at one end of the housing 1, and the sampling device 7 and the arc extinguishing system 6 are arranged at the other end of the housing 1; the electromagnetic system 3-0 and the contact system 4 are arranged in sequence between the operating member 2 and the arc extinguishing system 6 along the length direction d1; the sampling device 7 and the arc extinguishing system 6 are arranged side by side along the height direction d3, and at least part of the circuit board 11p of the control system 11 is arranged side by side with the electromagnetic system 3-0 along the height direction d3.

[0121] The circuit breaker of the present invention adopts the above layout, which is compact and reasonable in structure, is beneficial to reducing the overall specification size of the circuit breaker of the present invention, and conforms to the development trend of miniaturization of circuit breakers.

[0122] Further, the operating member 2, the electromagnetic system 3-0 and the sampling device 7 are arranged on the same side of the arc extinguishing system 6 in the height direction d3; that is, in the height direction d3, the operating member 2, the electromagnetic system 3-0 and the sampling device 7 are on the same side relative to the side where the arc extinguishing system 6 is located, and the operating member 2, the electromagnetic system 3-0 and the sampling device 7 are arranged on the same side inside the housing 1. The above layout is beneficial to the wiring of the control system 11 and the electromagnetic system 3-0 and the coupling of the sampling device 7 and the contact system 4, and further simplifies the internal layout of the circuit breaker of the present invention.

[0123] Furthermore, the circuit board 11p is arranged side by side with the contact system 4 and / or the arc extinguishing system 6 in the width direction d2; in the circuit breaker of the present utility model, the circuit board 11p is arranged side by side with the contact system 4 and the arc extinguishing system 6 in the width direction d2. It should be noted that whether the circuit board 11p is arranged side by side with the contact system 4 and the arc extinguishing system 6 in the width direction d2 can be adjusted according to the specific dimensions of the circuit board 11p.

[0124] Specifically, as Figure 1-2 shown in directions 6, Figure 1 the up-and-down direction is the length direction d1, Figure 1 the inside-outside direction is the width direction d2, Figure 1 and the left-right direction is the height direction d3; the operating member 2 is arranged at the upper end of the housing 1, the sampling device 7 and the arc extinguishing system 6 are arranged at the lower end of the housing 1, the sampling device 7 and the arc extinguishing system 6 are arranged side by side in the left-right direction, and at least part of the circuit board 11p of the control system 11 and the electromagnetic system 3-0 are arranged side by side in the left-right direction. The operating member 2, the electromagnetic system 3-0, and the sampling device 7 are all arranged on the right side of the arc extinguishing system 6; that is, in the left-right direction, the electromagnetic system 3-0 is located on the right side of the circuit board 11p of the control system 11, the sampling device 7 is located on the right side of the arc extinguishing system 6, and the sampling member 2, the electromagnetic system 3-0, and the sampling device 7 are all arranged on the right side inside the housing 1.

[0125] As another embodiment, the operating member 2, the electromagnetic system 3-0, and the sampling device 7 are all arranged on the left side of the arc extinguishing system 6, that is, the components inside the circuit breaker are arranged in a mirror image manner with respect to this embodiment.

[0126] Furthermore, the first terminal 8-0 and the second terminal 5-0 are respectively arranged at both ends of the housing 1 in the length direction d1, the third terminal 5-0 is arranged side by side with the operating member 2 in the direction d3, and the electromagnetic system 3-0, the arc extinguishing system 6, the sampling device 7, and the control system 11 are located between the operating member 2 and the first terminal 8-0 in the length direction d1; that is, the operating member 2 and the first terminal 8-0 are located at the two ends of the housing 1 with the farthest distance in the length direction d1, and the operating member 2, the electromagnetic system 3-0, the sampling device 7, and the first terminal 8-0 are located on the same side of the third terminal 5-0 and the arc extinguishing system 6 in the height direction d3.

[0127] Specifically, as Figure 2 shown in directions 6 , the operating member 2 and the third terminal 5-0 are both arranged at the uppermost end of the housing 1, the third terminal 5-0 is arranged on the left side of the operating member 2, the first terminal 8-0 is arranged at the lowermost end of the housing 1, the electromagnetic system 3-0 and the sampling device 7 are arranged from top to bottom between the operating member 2 and the first terminal 8-0, and the third terminal 5-0, the control system 11, and the arc extinguishing system 6 are arranged in sequence from top to bottom.

[0128] As other embodiments, in the length direction d1, the first terminal 8-0 and the second terminal 5-1 are arranged at one end of the circuit breaker, and the operating member 2 is arranged at the other end of the circuit breaker, that is, the first terminal 8-0 and the second terminal 5-1 are arranged on the same end of the circuit breaker. Further, the first terminal 8-0 and the second terminal 5-1 are arranged side by side at intervals along the height direction d3.

[0129] Further, the third jack 1-50, the fourth jack 1-51, the signal window 1-4, and the operating member mounting hole 1-6 are all arranged on the same side wall of the housing 1, and the third jack 1-50, the fourth jack 1-51, and the signal window 1-4 are arranged in a triangular shape; in the direction d3, the fourth jack 1-51 is the farthest from the operating member jack 1-6, and the signal window 1-4 is the closest to the operating member jack 1-6; in the width direction d2, the fourth jack 1-51 and the signal window 1-4 are located on the same side of the third jack 1-50.

[0130] Further, the connecting conductor 20 of the main circuit structure and the circuit board 11p of the control system 11 are arranged side by side along the width direction d2, the first sampling terminal 11-0 and the connecting conductor 20 are located on the same side of the circuit board 11p, and the first sampling terminal 11-0, the connecting conductor 20, and the electromagnetic system 3-0 are arranged side by side along the height direction d3; the above layout design is beneficial to reducing the height dimension of the circuit breaker of the present invention, and the thickness of the circuit board 11p itself is limited. The side-by-side arrangement of the connecting conductor 20 and the circuit board 11p also makes full use of the space of the housing 1 in the width direction d2, and the side-by-side arrangement of the first sampling terminal 11-0, the connecting conductor 20, and the electromagnetic system 3-0 along the height direction d3 also makes full use of the space of the housing 1 in the height direction d3.

[0131] Further, the second terminal 8-1 of the secondary circuit structure and the first terminal 8-0 of the main circuit structure are arranged side by side along the height direction d3, and the second terminal 8-1 and the first terminal 8-0 are arranged at the same end of the housing 1 in the direction d1. Further, the signal terminal 12 of the main circuit structure is located between the first terminal 8-0 and the second terminal 8-1 in the direction d3, and the signal terminal 12, the first terminal 8-0, and the second terminal 8-1 are arranged at the same end of the housing 1 in the length direction d1. Further, the first jack 1-20, the signal jack 1-3, and the second jack 1-21 are arranged at intervals in sequence along the height direction d3 at one end of the housing 1.

[0132] Further, the electromagnetic system 3-0, the contact system 4, the arc extinguishing system 6, and the sampling device 7 are arranged side by side along the height direction d3 with the through conductor of the secondary circuit structure; that is, the electromagnetic system 3-0, the contact system 4, the arc extinguishing system 6, and the sampling device 7 are arranged on the same side of the through conductor in the height direction d3.

[0133] Further, at least part of the through-conductor is arranged side by side with the circuit board 11p of the control system 11 in the width direction d2, and this part is also inserted and cooperated with the second sampling terminal 11-1. The second sampling terminal 11-1 is arranged side by side with the electromagnetic system 3-0 in the height direction d3.

[0134] Further, the rotation plane of the indicating member 13 is parallel to the length direction d1 and perpendicular to the width direction d2 and the height direction d3.

[0135] Further, the first locking member 14 and the third terminal 5-0 are respectively arranged at both ends of the housing 1 in the height direction d3.

[0136] Further, the second locking member 15 and the third terminal 5-0 are respectively arranged at both ends of the housing 1 in the height direction d3.

[0137] Further, when the circuit breaker of the present invention is provided with the first locking member 14 and the second locking member 15 at the same time, the first locking member 14 and the second locking member 15 are arranged side by side in the width direction d2.

[0138] Further, the first opening and the second opening are arranged on the right side wall of the housing 1, and the installation guiding structure 1-1 is arranged on the left side wall of the housing 1.

[0139] As Figure 1As shown, the length direction, width direction, and height direction of the housing 1 are the same as the length direction d1, width direction d2, and height direction d3 of the circuit breaker; the length a of the housing 1 is 100 - 150 mm, the width b is 10 - 60 mm, and the height c is 38 - 45 mm. The dimension of the height c of the housing 1 is the modular dimension of the circuit breaker of the present utility model. Further, the width b is 10, 15, 20, 25, 30, 60 mm. Further, for the circuit breaker of the present utility model, when the width b of its housing 1 is 10 mm, the rated current ≤ 32 A; for the circuit breaker of the present utility model, when the width b of its housing 1 is 15, 20, or 25 mm, the rated current ≤ 63 or 80 A; for the circuit breaker of the present utility model, when the width b of its housing 1 is 30 mm, the rated current ≤ 125 A; for the circuit breaker of the present utility model, when the width b of its housing 1 is 60 mm, the rated current ≤ 250 A. For the circuit breaker of the present utility model, the width b of its housing 1 can be adjusted according to actual needs, and then the number of moving contacts 4 - 11 and / or static contacts 4 - 2 can be increased along the width direction of the housing 1, and / or the dimensions of the moving contacts 4 - 11 and / or static contacts 4 - 2 along the width direction of the housing 1 can be increased to increase the current-carrying cross-section, thereby improving the current-carrying capacity of the circuit breaker of the present utility model. Further, the length a of the housing 1 is the distance between the outer sides of the two side walls perpendicular to the length direction d1 of the housing 1, the width of the housing 1 is the distance between the outer sides of the two side walls perpendicular to the width direction d2 of the housing 1, and the height of the housing 1 is the distance between the outer sides of the two side walls perpendicular to the height direction d3 of the housing 1.

[0140] As Figure 2-10 shown, the circuit breaker of the present utility model further includes an operating system, and the operating system includes an operating member 2, an operating mechanism 3, a moving contact mechanism 4 - 1, a sampling device 7, and a control system 11. Further, the operating system further includes an indicating member 13.

[0141] As Figure 2-5 shown, it is the first embodiment of the operating system.

[0142] The operating system of this embodiment also includes a trigger mechanism 17 connected to the control system 11. The trigger mechanism 17 is triggered by the operating member 2 moving to the closing position and outputs a first closing signal to the control system 11. After receiving the first closing signal, the control system 11 controls the electromagnetic system 3-0 to operate so that the top rod 3-05 drives the moving contact mechanism 4-1 to move to the closed position; that is, when the operating member 2 is operated by an external force to perform a closing operation (that is, when the circuit breaker of the utility model is closed), the operating member 2 triggers the trigger mechanism 17 when it moves from the opening position to the closing position, and the trigger mechanism 17 outputs the first closing signal to the control system 11, and then the control system 11 controls the electromagnetic system 3-0 to operate so that the top rod 3-05 moves from the second position to the first position, and the top rod 3-05 drives the moving contact mechanism 4-1 to move from the opening position to the closing position. Further, during the movement of the operating member 2 to the closing position, the top rod 3-05 remains stationary; that is, during the movement of the operating member 2 from the opening position to the closing position, the top rod 3-05 does not move with the operating member 2, but remains in the second position, and the moving contact mechanism 4-1 also remains in the disconnected position. Further, the trigger mechanism 17 is a micro switch.

[0143] Furthermore, the two ends of the push rod 3-05 are respectively connected to the operating member 2 and the moving contact mechanism 4-1; the push rod 3-05 is driven by the operating member 2 moving to the opening position to move, thereby driving the moving contact mechanism 4-1 to move to the disconnecting position, that is, the operating member 2 moves from the closing position to the opening position and drives the push rod 3-05 to move from the first position to the second position, and the push rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the closing position to the disconnecting position, thereby opening the circuit breaker of the utility model; in other words, when the circuit breaker of the utility model is opened, the operating member 2 directly drives the push rod 3-05 to move and the moving contact mechanism 4-1 is driven by the push rod 3-05 to move to the disconnecting position.

[0144] In the operating system of this embodiment, when the operating member 2 moves from the opening position to the closing position to perform the closing operation, the electromagnetic coil of the electromagnetic system 3-0 is involved; when the operating member 2 moves from the closing position to the closing position to perform the opening operation, the electromagnetic coil of the electromagnetic system 3-0 is not involved.

[0145] Specifically, Figure 3-5As shown, the operating member 2 includes an operating member main body 2b for external force operation and an operating member connecting portion 2c. One end of the ejector rod 3-05 is engaged with the operating member connecting portion 2c and is relatively movably arranged along the moving direction of the operating member 2 with respect to the operating member connecting portion 2c. The operating member main body 2b is slidably arranged on the housing 1 and one end protrudes outside the housing 1 for external force operation (that is, one end of the operating member 2 protrudes outside the housing 1 for external force operation). Further, the operating member connecting portion 2c includes a connecting portion cavity 2-1c; the ejector rod 3-05 includes a front rod body 3-0500 and a front connecting cap 3-0501. The front connecting cap 3-0501 includes a front brim, and the front brim protrudes radially on one side of the front rod body 3-0500 along the front rod body 3-0500; the front connecting cap 3-0501 is movably arranged in the connecting portion cavity 2-1c, and the side wall of the connecting portion cavity 2-1c (the operating member opening wall) is in driving cooperation with the front brim. When the operating member 2 moves from the closing position to the opening position, the ejector rod 3-05 is driven to move to drive the moving contact mechanism 4-1 to move through the ejector rod 3-05 so that the contact system 4 is disconnected. Further, the operating member connecting portion 2c further includes a connecting portion jack 2-0c provided on the connecting portion cavity 2-1c; the outer diameter of the front connecting cap 3-0501 is greater than the outer diameter of the front rod body 3-0500. The front rod body 3-0500 is slidably inserted into the connecting portion jack 2-0c and the outer diameter of the front rod body 3-0500 is adapted to the inner diameter of the connecting portion jack 2-0c. The outer diameter of the front connecting cap 3-0501 is greater than the inner diameter of the connecting portion jack 2-0c and is movably arranged in the connecting portion cavity 2-1c. Further, the operating member connecting portion 2c includes a first connecting portion opening and a second connecting portion opening respectively provided on one side thereof. The first connecting portion opening is provided on the radial side of the connecting portion jack 2-0c and is in communication with it. The second connecting portion opening is in communication with the connecting portion cavity 2-1c; the front connecting cap 3-0501 enters the connecting portion cavity 2-1c from the second connecting portion opening and the front rod body 3-0500 enters the connecting portion jack 2-0c from the first connecting portion opening. Further, the operating member connecting portion 2c is a frame structure, which includes a connecting portion first side and a connecting portion second side. The connecting portion first side is connected to the operating member main body 2b. The connecting portion jack 2-0c is provided on the connecting portion second side. The connecting portion cavity 2-1c is located in the middle of the frame structure of the operating member connecting portion 2c. Further, the operating member 2 further includes an operating member cooperating portion 2p connected to the operating member main body 2b and arranged side by side with the operating member connecting portion 2c; the operating member return spring 18 is a compression spring and is arranged side by side with the operating member connecting portion 2c, with one end cooperating with the operating member cooperating portion 2p and the other end fixedly arranged (for example, fixed on the housing 1).

[0146] As other embodiments, the operating member connecting portion 2c has an L-shaped structure, which includes a connecting portion vertical arm and a connecting portion horizontal arm. One end of the connecting portion vertical arm is connected to the operating member main body 2b, and the other end is bent and connected to the connecting portion horizontal arm. The connecting portion vertical arm, the connecting portion horizontal arm and the operating member main body 2b enclose a connecting portion cavity 2c. The connecting portion horizontal arm is in driving cooperation with the front brim of the front connecting cap 3-0501. Further, the connecting portion horizontal arm is provided with a connecting portion jack 2-0c. Further, the connecting portion jack 2-0c is provided at the free end of the connecting portion horizontal arm. The front connecting cap 3-0501 and the front rod body 3-0500 enter the connecting portion cavity 2-1c and the connecting portion jack 2-0c respectively from the direction opposite to the connecting portion vertical arm.

[0147] As other embodiments, the operating member connecting portion 2c has an L-shaped structure, which includes a connecting portion vertical arm and a connecting portion horizontal arm. One end of the connecting portion vertical arm is connected to the operating member 2b, and the other end is bent and connected to the connecting portion horizontal arm; the connecting rod 3-05 is provided with a connecting rod waist-shaped hole, and the connecting portion horizontal arm is movably inserted into the connecting portion waist-shaped hole; when the operating member 2 moves from the opening position to the closing position, the connecting portion horizontal arm moves in the connecting rod waist-shaped hole, and the connecting rod 3-05 remains stationary.

[0148] Further, the operating member connecting portion 2c is further configured to trigger the trigger mechanism 17. Further, the trigger mechanism 17 and the operating member return spring 18 are respectively arranged on both sides of the operating member connecting portion 2c along the width direction d2.

[0149] As other embodiments, the operating system further includes another trigger mechanism - a tripping trigger mechanism, and the tripping trigger mechanism is also connected to the control system 11; during the process that the operating member 2 moves from the closing position to the opening position, the ejector rod 3-05 remains stationary. When the operating member 2 moves to the opening position, the tripping trigger mechanism is triggered, and the tripping trigger mechanism sends a first tripping signal to the control system 11. After receiving the first tripping signal, the control system 11 controls the electromagnetic system 3-0 to operate, and the electromagnetic system 3-0 drives the ejector rod 3-05 to move from the first position to the second position. The ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the closed position to the open position to disconnect from the static contact 4-2.

[0150] Further, the operating mechanism 3 further includes a front connecting rod 3-1. The front connecting rod 3-1 is connected to the operating member 2 and is arranged to move synchronously. The front connecting rod 3-1 has a structure similar to the operating member connecting portion 2c of the operating member 2 and is connected to the front connecting cap 3-0501 and the front rod body 3-0500 of the ejector rod 3-0. Further, the front connecting rod 3-1 and the operating member 2 are of a detachable split structure or an integral structure.

[0151] As Figure 1-5 shown, it is the first embodiment of the circuit breaker of the present invention, which includes the operating system of the first embodiment.

[0152] As shown Figure 5 in the figure, when the circuit breaker of this embodiment is closed, the operating member body 2b of the operating member 2 is operated (pressed) by an external force to drive the operating member 2 to move from the open position to the closed position. During the process of the operating member 2 moving from the open position to the closed position, the ejector rod 3-05 remains stationary (as shown Figure 5 (a)-5(b)), when the operating member 2 moves to the closed position (as shown Figure 5 (b)), it triggers the trigger mechanism 17. When the trigger mechanism 17 is triggered, it sends a first closing signal to the control system 11. After receiving the first closing signal, the control system 11 controls the electromagnetic system 3-0 to operate. The electromagnetic system 3-0 drives the ejector rod 3-05 to move from the second position to the first position (as shown Figure 5 (b)-5(c)), and the ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the open position to the closed position to close with the static contact 4-2 (as shown Figure 5 (b)-5(c)).

[0153] As shown Figure 5 in the figure, from Figure 5 (c) to 5(a) shows the opening process of the circuit breaker of this embodiment: when the circuit breaker of this embodiment is opened, the operating member body 2b is operated (pulled) by an external force to drive the operating member 2 to move from the closed position to the open position. The operating member 2 simultaneously drives the ejector rod 3-05 to move from the first position to the second position (the operating member connecting portion 2c presses against the front connecting cap 3-0501 of the ejector rod 3-05 through the second side of the connecting portion to make the ejector rod 3-05 move from the first position to the second position), and the ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the closed position to the open position to disconnect from the static contact 4-2.

[0154] The circuit breaker of this embodiment includes a first locking mechanism. The first locking mechanism includes a first locking member 14 and a first locking member return spring 16. Further, the circuit breaker of this embodiment further includes an unlocking mechanism 19. The unlocking mechanism 19 is an unlocking rod. One end of the unlocking rod is in transmission cooperation with the operating member 2 (directly or indirectly in transmission cooperation), and the other end is in transmission cooperation with the first locking member 14. Specifically, one end (the front end of the unlocking rod) of the unlocking rod abuts against the operating member 2 (that is, the front end of the unlocking rod is directly in transmission cooperation with the operating member 2), the middle part is movably abutted against the abutting protrusion of the housing 1 and is rotatably arranged with the abutting protrusion as a fulcrum, and the other end (the rear end of the unlocking rod) is hinged to the first locking member 14; when the operating member 2 is pulled at the open position, it presses against the front end of the unlocking rod to drive the unlocking rod to rotate with the abutting protrusion as a fulcrum, and the rear end of the unlocking rod drives the first locking member 14 to move towards the inside of the housing 1.

[0155] As other embodiments, one end (the front end of the unlocking rod) of the unlocking rod abuts against the indicating member 13 (that is, the front end of the unlocking rod is indirectly driven and cooperated with the operating member 2 through the indicating member 13), the middle part thereof abuts against the abutting protrusion of the housing 1 movably and is rotationally arranged with the abutting protrusion as a fulcrum, and the other end (the rear end of the unlocking rod) is hinged to the first locking member 14; when the operating member 2 is pulled at the opening position, the indicating member 13 presses against the front end of the unlocking rod to drive the unlocking rod to rotate with the abutting protrusion as a fulcrum, and the rear end of the unlocking rod drives the first locking member 14 to move towards the inside of the housing 1.

[0156] As other embodiments, the front end of the unlocking rod is hinged to the operating member 2, the rear end of the unlocking rod is hinged to the first locking member 14, and the middle part of the unlocking rod abuts against the abutting protrusion; when the operating member 2 is pulled at the opening position, while the operating member 2 drives the unlocking rod to move through the front end of the unlocking rod, the unlocking rod rotates with the abutting protrusion as a fulcrum, and the rear end of the unlocking rod drives the first locking member 14 to move towards the inside of the housing 1.

[0157] The circuit breaker of this embodiment may further include a second locking mechanism, and the second locking mechanism includes a second locking member 15; when the circuit breaker of this embodiment is closed, the second locking member 15 is directly driven by the operating member 2 to rotate forward so that the second locking protrusion 15-0 of the second locking member 15 protrudes outside the housing 1; when the circuit breaker of this embodiment is opened, the second locking member 15 is directly driven by the operating member 2 to rotate reversely so that the second locking protrusion 15-0 moves towards the inside of the housing 1; when the circuit breaker of this embodiment is in the closed state, the operating member 2 is directly in limit cooperation with the second locking member 15 to limit the reverse rotation of the second locking member 15. Further, when the circuit breaker of this embodiment is closed, the second locking member forearm 15-3 of the second locking member 15 is directly driven by the operating member 2 to make the second locking member 15 rotate forward. Further, when the circuit breaker of this embodiment is in the open state, the second locking member 15 is directly driven by the operating member 2 pulled at the opening position to rotate reversely, and the first locking member 14 is driven by the reversely rotating second locking member 15 to move towards the inside of the housing 1; that is, when the circuit breaker of this embodiment is in the open state and the operating member 2 is pulled at the opening position, the operating member 2 drives the second locking member 15 to rotate reversely at the same time, and the second locking member 15 drives the first locking member 14 to move towards the inside of the housing 1 at the same time.

[0158] Further, when the operating member 2 is at the opening position, there is a free stroke between the operating member 2 and the front connection cap 3-0501 of the ejector rod 3-05, allowing the operating member 2 to move relative to the ejector rod 3-05 towards the outside of the housing 1, so that the operating member 2 can drive the first locking member 14 to move towards the inside of the housing 1 through the unlocking mechanism 9 or the second locking member 15 at the opening position. Specifically, when the operating member 2 is at the opening position, there is a free stroke between the operating member parting wall of the operating member 2 and the front connection cap 3-0501.

[0159] like Figure 6-10 FIG. 1 shows a second embodiment of the operating system.

[0160] In the operating system of this embodiment, the two ends of the top rod 3-05 of the electromagnetic system 3-0 are respectively connected to the operating member 2 and the moving contact mechanism 4-1 by transmission. The operating member 2 switches between the closing position and the opening position, and the moving contact mechanism 4-1 is driven by the top rod 3-05 to switch between the closing position and the opening position. That is, when the operating member 2 moves from the opening position to the closing position, the top rod 3-05 is driven by the operating member 2 and moves from the second position to the first position at the same time, and the moving contact mechanism 4-1 is driven by the top rod 3-05 and moves from the opening position to the closing position at the same time and closes with the static contact 4-2; when the operating member 2 moves from the closing position to the opening position, the top rod 3-05 is driven by the operating member 2 and moves from the first position to the second position at the same time, and the moving contact mechanism 4-1 is driven by the top rod 3-05 and moves from the closing position to the opening position at the same time and disconnects with the static contact 4-2.

[0161] Furthermore, the operating mechanism 3 further includes a front connecting rod 3-1, which is connected to the operating member 2 and is arranged to move synchronously. Further, the front connecting rod 3-1 includes a front connecting rod driving part 3-11 and a front connecting rod connecting part 3-12, the front connecting rod connecting part 3-12 is used to be connected to the operating member 2, and the front connecting rod driving part 3-11 is used to be connected to the top rod 3-05 by transmission. Further, when the operating member 2 is in the opening position, a free stroke is provided between the front connecting rod 3-1 and the top rod 3-05, allowing the front connecting rod 3-1 to move to the outside of the housing 1 relative to the top rod 3-05 under the drive of the operating member 2.

[0162] Specifically, the front link driving part 3-11 includes a front link jack 3-111 and a front link cavity 3-110; the ejector rod 3-05 includes a front rod body 3-0500 and a front connection cap 3-0501. The outer diameter of the front connection cap 3-0501 is greater than that of the front rod body 3-0500. The front rod body 3-0500 is slidably inserted into the front link jack 3-111, and the outer diameter of the front rod body 3-0500 is adapted to the inner diameter of the front link jack 3-111. The front connection cap 3-0501 is arranged in the front link cavity 3-110, and the outer diameter of the front connection cap 3-0501 is greater than the inner diameter of the front link jack 3-111. The front link driving part 3-11 includes a front link closing wall and a front link opening wall that are opposite and respectively located on both sides of the front link cavity 3-110. The front link jack 3-111 is provided on the front link opening wall. When the operating member 2 moves from the opening position to the closing position, the front link closing wall presses against the front connection cap 3-0501 to drive the front link 3-05 to move from the second position to the first position. When the operating member 2 moves from the closing position to the opening position, the front link opening wall presses against the front connection cap 3-0501 to drive the front link 3-05 to move from the first position to the second position. When the operating member 2 is in the opening position, a free stroke is formed between the front link opening wall and the front connection cap 3-0501, allowing the operating member 2 to be pulled relative to the ejector rod 3-05 and move outside the housing 1. Thus, the operating member 2 drives the first locking member 14 to move into the housing 1 through the unlocking mechanism 19 or the second locking member 15. Further, the front link driving part 3-11 further includes a first driving part opening and a second driving part opening respectively provided on one side thereof. The first driving part opening communicates with the front link cavity 3-110, and the second driving part opening communicates with the front link jack 3-111 and is located on the radial side of the front link jack 3-111. The front link cap 3-0501 enters the front link cavity 3-110 through the first driving part opening, and the front rod body 3-0500 enters the front link jack 3-111 through the second driving part opening.

[0163] Specifically, the front link connecting part 3-12 includes a pair of front link connecting walls, and the two front link connecting walls are respectively arranged on both sides of the operating member 2 and connected thereto. Further, the two front link connecting walls are connected to the operating member 2 through a front connecting shaft 3-31 and are respectively located on both sides of the two side walls of the installation cavity 2-2 of the operating member 2. The front connecting shaft 3-31 passes through the indicating member mounting part 13-2 of the indicating member 13 and is rotationally matched therewith, that is, the indicating member 13 is rotatably arranged on the operating member 2 through the front connecting shaft 3-31. Operating member shaft holes 2-4 for inserting the front connecting shaft 3-31 are provided on both side walls of the installation cavity 2-2. The front link connecting wall is provided with a front link connecting hole 3-1200 for inserting the front connecting shaft 3-31.

[0164] Such as Figure 1 、 6As shown in FIG. -12, a second embodiment of the circuit breaker of the present invention is provided, which includes an operating system of the second embodiment.

[0165] When the circuit breaker of this embodiment is closed, the operating member body 2b of the operating member 2 is operated (pressed) by an external force to drive the operating member 2 to move from the open position to the closed position. At the same time, the operating member 2 drives the ejector rod 3-05 to move from the second position to the first position through the front link 3-1. The ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the open position to the closed position to close with the static contact 4-2.

[0166] Furthermore, the operating member 2 and the front link 3-1 are of a detachable split structure or an integral structure.

[0167] When the circuit breaker of this embodiment is opened, the operating member body 2b is operated (pulled) by an external force to drive the operating member 2 to move from the closed position to the open position. At the same time, the operating member 2 drives the ejector rod 3-05 to move from the first position to the second position through the front link 3-1. The ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the closed position to the open position to disconnect from the static contact 4-2.

[0168] In the circuit breaker of this embodiment, when the operating member 2 performs the closing operation and the opening operation, the electromagnetic coil of the electromagnetic system 3-0 is not involved.

[0169] The circuit breaker of this embodiment includes a first locking mechanism and a second locking mechanism. The first locking mechanism includes a first locking member 14 and a first locking member return spring 16, and the second locking mechanism includes a second locking member 15. Further, when the circuit breaker of this embodiment is closed, the second locking member 15 is driven by the front link 3-1 (the front link 3-1 is arranged to move synchronously with the operating member 2, and the second locking member 15 is driven by the front link 3-1, that is, indirectly driven by the operating member 2) to rotate forward so that the second locking protrusion 15-0 of the second locking member 15 protrudes outside the housing 1; when the circuit breaker of this embodiment is opened, the second locking member 15 is driven by the front link 3-1 to rotate reversely so that the second locking protrusion 15-0 moves towards the inside of the housing 1; when the circuit breaker of this embodiment is in the closed state, the front link 3-1 and the second locking member 15 are in limit cooperation to limit the reverse rotation of the second locking member 15. Further, when the circuit breaker of this embodiment is closed, the front arm 15-3 of the second locking member 15 is driven by the front link 3-1 to make the second locking member 15 rotate forward. Further, when the circuit breaker of this embodiment is in the open state, the second locking member 15 is driven to rotate reversely by the operating member 2 that is pulled at the open position, and the first locking member 14 is driven by the reversely rotating second locking member 15 to move towards the inside of the housing 1; that is, when the circuit breaker of this embodiment is in the open state and the operating member 2 is pulled at the open position, the operating member 2 simultaneously drives the second locking member 15 to rotate reversely, and the second locking member 15 simultaneously drives the first locking member 14 to move towards the inside of the housing 1; the operating member 2 can simultaneously unlock the first locking member 14 and the second locking member 15, which is beneficial to improving the operation efficiency and simplifying the structure of the circuit breaker.

[0170] Specifically, the second locking member 15 further includes a second locking member mounting portion 15-2 and a second locking member front arm 15-3. The second locking member 15 is rotatably arranged on the housing 1 through the second locking member mounting portion 15-2. One end of the second locking member front arm 15-3 is connected to the second locking member mounting portion 15-2, and the other end is provided with a second locking member protrusion 15-0. When the circuit breaker of this embodiment is closed, the second locking member front arm 15-3 is driven by the front link 3-1 to rotate the second locking member 15 forward. Further, the second locking member 15 further includes a second locking member mating portion 15-4 arranged on the second locking member front arm 15-3. The second locking member mating portion 15-4 and the second locking member protrusion 15-0 are respectively arranged on both sides of the second locking member front arm 15-3. When the circuit breaker of this embodiment is closed, the second locking member mating portion 15-4 is pressed by the front link 3-1 to rotate the second locking member 15 forward. Further, the second locking member mating portion 15-4 includes a mating portion transition surface 15-41 and a mating portion limiting surface 15-40 which are bent and connected. The front link 3-1 includes a front link first transition surface 3-121, a front link limiting surface 3-122 and a front link second transition surface 3-123 which are connected in sequence. The front link first transition surface 3-121 and the front link second transition surface 3-123 are respectively bent and connected to the front link limiting surface 3-122 and bent toward the same side of the front link limiting surface 3-122 (the side away from the second locking member 15). The mating portion limiting surface 15-40 abuts against the front link limiting surface 3-122 to prevent the second locking member 15 from rotating reversely. The mating portion limiting surface 15-40 and the front link limiting surface 3-122 are both parallel to the moving direction of the front link 3-1. When the circuit breaker of this embodiment is in the open state, when the operating member 2 is pulled, the front link second transition surface 3-123 and the front link limiting surface 3-122 sequentially contact the free end of the second locking member front arm 15-3 to drive the second locking member 15-3 to rotate reversely, and the front link limiting surface 3-122 is in limit cooperation with the free end of the second locking member front arm 15-3 to prevent the second locking member 15 from rotating forward. When the circuit breaker of this embodiment is closed, the front link first transition surface 3-121 and the front link limiting surface 3-122 respectively contact the mating portion transition surface 15-41 and the mating portion limiting surface 15-40 in sequence to drive the second locking member 15 to rotate forward. Further, the second locking member 15 further includes a second locking member rear arm 15-1. One end of the second locking member rear arm 15-1 is connected to the second locking member mounting portion 15-2, and the other end is in transmission cooperation with the front link 3-1. Further, the second locking member front arm 15-3 and the second locking member rear arm 15-1 are arranged in a V shape, and the included angle between the two is an obtuse angle, and the opening of the obtuse angle faces the operating member 2.Further, the first locking member 14 includes a first locking member actuating portion 14-2; the first locking member actuating portion 14-2 is pressed by the rear arm 15-1 of the second locking member 15 that rotates reversely, thereby driving the first locking member 14 to move inside the housing 1; that is to say, when the circuit breaker of this embodiment is in the open state and the operating member 2 is in the open position, if the operating member 2 is pulled by an external force and moves outside the housing 1, the operating member 2 simultaneously drives the second locking member 15 to rotate reversely, and the second locking member 15 simultaneously presses the first locking member actuating portion 14-2 through the rear arm 15-1 of the second locking member to drive the first locking member 14 to move inside the housing 1. Further, one end of the first locking member 14 is a first locking member protrusion 14-1, and a first locking member actuating portion 14-2 is provided on one side of the other end. The first locking member actuating portion 14-2 is a rib, and the protruding direction of the rib is perpendicular to the sliding direction of the first locking member 14 and the same as the rotation axis of the second locking member 15.

[0171] The following is the third embodiment of the circuit breaker of the present invention.

[0172] The circuit breaker of this embodiment is provided with two trigger mechanisms, one is a closing trigger mechanism, and the other is an opening trigger mechanism; when the operating member 2 moves to the open position or when it reaches the open position, the opening trigger mechanism is triggered, causing an electromagnetic coil of the electromagnetic system 3-0 to be energized and operate. The electromagnetic system 3-0 drives the ejector rod 3-05 to move from the first position to the second position, and the ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the closed position to the open position; when the operating member 2 moves to the closing position or when it reaches the closing position, the closing trigger mechanism is triggered, causing the other electromagnetic coil of the electromagnetic system 3-0 to be energized and operate. The electromagnetic system 3-0 drives the ejector rod 3-05 to move from the second position to the first position, and the ejector rod 3-05 simultaneously drives the moving contact mechanism 4-1 to move from the open position to the closed position; for the circuit breaker of this embodiment, the ejector rod 3-05 is not affected by the movement of the operating member 2, and its movement is only driven by the electromagnetic coil of the electromagnetic system 3-0. Further, the circuit breaker of this embodiment further includes a control system 11 and a sampling device 7. The control system 11 and the sampling device 7 are only used to control the moving contact mechanism 4-1 to move from the closed position to the open position through the electromagnetic system 3-0 when a short circuit and overload fault occur in the circuit where the circuit breaker is located, and are not used for the normal opening and closing control of the circuit breaker.

[0173] The following is the fourth embodiment of the circuit breaker of the present invention.

[0174] The circuit breaker of this embodiment includes at least one set of power supply switch circuits. The power supply switch circuit includes a trigger mechanism 17 and a normally closed switch connected in series in the power supply switch circuit. The power supply switch circuit is connected in series between the power supply of the electromagnetic system 3-0 and the electromagnetic system 3-0. When the circuit breaker of this embodiment is closed, when the operating member 2 moves from the open position to the closed position, the trigger mechanism 17 is triggered by the operating member 2 to conduct, and the electromagnetic system 3-0 is powered on to drive the ejector rod 3-05 to move from the second position to the first position, so that the circuit breaker is closed. At the same time, the ejector rod 3-05 directly or indirectly triggers the normally closed switch to make it open, and disconnects the power supply of the electromagnetic system 3-0 and the electromagnetic system 3-0. When the circuit breaker of this embodiment is opened, the operating member 2 moves from the closed position to the open position, and at the same time drives the ejector rod 3-05 to move from the first position to the second position, so that the circuit breaker is opened. Further, the electromagnetic system 3-0 is also used to implement the short-circuit and / or overload protection function of the circuit breaker of this embodiment. Then, the circuit breaker of this embodiment further includes a control system 11. The control system 11 is electrically connected to the electromagnetic system 3-0. The circuit structure for realizing the electrical connection between the control system 11 and the electromagnetic system 3-0 is connected in parallel with the power supply switch circuit. When the control system 11 detects a short-circuit and / or overload current through the sampling device 7, it drives the electromagnetic system 3-0 to act to make the ejector rod 3-05 move from the first position to the second position, and the operating member 2 is reset from the closed position to the open position at the same time.

[0175] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is usually placed during use. It is only for the convenience of description and does not indicate that the device or element referred to must have a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating relative importance.

[0176] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A circuit breaker, comprising a housing (1) and a main circuit structure, the main circuit structure comprising an operating member (2) slidably arranged on the housing (1), and an electromagnetic system (3-0), a contact system (4), an arc extinguishing system (6) used in conjunction with the contact system (4), and a control system (11) connected to the control of the electromagnetic system (3-0), the electromagnetic system (3-0) comprising a magnetic generating component (3-0m) and a top rod (3-05) movably inserted in the middle of the magnetic generating component (3-0m), the contact system (4) comprising a moving contact mechanism (4-1) and a stationary contact (4-2), the two ends of the top rod (3-05) respectively transmitting and cooperating with the operating member (2) and the moving contact mechanism (4-1), the operating member (2) reciprocatingly slides to drive the contact system (4) to close and open through the electromagnetic system (3-0), and the control system (11) controls the electromagnetic system (3-0) to move to drive the contact system (4) to close and open; Features: The main circuit structure also includes a sampling device (7) coupled to the contact system (4) and connected to the control system (11). When an overload and / or short-circuit current flows through the contact system (4), the electromagnetic system (3-0) is controlled by the control system (11) to drive the contact system (4) to disconnect.

2. The circuit breaker according to claim 1, characterized in that: The movable contact mechanism (4-1) is rotatably arranged; the circuit breaker further comprises a length direction d1, a width direction d2 and a height direction d3; in the length direction d1, the operating member (2) is arranged at one end of the housing (1) and the sampling device (7) and the arc extinguishing system (6) are arranged at the other end of the housing (1); the electromagnetic system (3-0) and the contact system (4) are arranged in sequence between the operating member (2) and the arc extinguishing system (6) along the length direction d1; the sampling device (7) and the arc extinguishing system (6) are arranged side by side along the height direction d3, and the control system (11) comprises a circuit board (11p), and at least a portion of the circuit board (11p) is arranged side by side with the electromagnetic system (3-0) along the height direction d3.

3. The circuit breaker according to claim 2, characterized in that: The circuit board (11p) and the contact system (4) and / or the arc extinguishing system (6) are arranged side by side along the width direction d2.

4. The circuit breaker according to claim 2, characterized in that: The operating member (2), the electromagnetic system (3-0) and the sampling device (7) are arranged on the same side of the arc extinguishing system (6) in the height direction d3.

5. The circuit breaker according to claim 4, characterized in that: The main circuit structure also includes a first terminal (8-0) and a third terminal (5-0) respectively arranged at two ends of the housing (1) along the length direction d1, the contact system (4) is connected in series between the first terminal (8-0) and the third terminal (5-0), the third terminal (5-0) and the operating member (2) are arranged side by side along the height direction d3, the electromagnetic system (3-0), the arc extinguishing system (6), the sampling device (7) and the control system (11) are located between the operating member (2) and the first terminal (8-0) in the length direction d1, and the operating member (2), the electromagnetic system (3-0), the sampling device (7) and the first terminal (8-0) are located on the same side of the third terminal (5-0) and the arc extinguishing system (6) in the height direction d3.

6. The circuit breaker according to claim 5, characterized in that: The sampling device (7) is a manganese copper shunt, and the first terminal (8-0), the sampling device (7), the moving contact mechanism (4-1), the static contact (4-2) and the third terminal (5-0) are connected in series in sequence; Alternatively, the sampling device (7) is a mutual inductor, and the first terminal (8-0), the moving contact mechanism (4-1), the static contact (4-2) and the third terminal (5-0) are connected in series in sequence.

7. The circuit breaker according to claim 5, characterized in that: The main circuit structure also includes a connecting conductor (20), the static contact (4-2) is electrically connected to the third terminal (5-0) via the connecting conductor (20), the connecting conductor (20) is a conductive plate, and the connecting conductor (20) and the circuit board (11p) of the control system (11) are arranged side by side along the width direction d2.

8. The circuit breaker according to claim 7, characterized in that: The control system (11) further comprises a first sampling terminal (11-0) arranged on the circuit board (11p); the first sampling terminal (11-0) and the connecting conductor (20) are located on one side of the circuit board (11p) in the width direction d2; the connecting conductor (20) and the first sampling terminal (11-0) are plugged and matched; the connecting conductor (20), the first sampling terminal (11-0) and the electromagnetic system (3-0) are arranged side by side in the height direction d3.

9. The circuit breaker according to claim 5, characterized in that: The circuit breaker further comprises a secondary circuit structure (9), the secondary circuit structure (9) being a through circuit and comprising a second terminal (8-1), a through conductor and a fourth terminal (5-1) connected in series in sequence, the second terminal (8-1) and the first terminal (8-0) being arranged side by side along a height direction d3, and the fourth terminal (5-1) and the third terminal (5-0) being arranged side by side along a width direction d2; the electromagnetic system (3-0), the contact system (4), the arc extinguishing system (6) and the sampling device (7) being arranged side by side with the through conductor along the height direction d3.

10. The circuit breaker according to claim 9, characterized in that: The control system (11) further comprises a second sampling terminal (11-1) arranged on the circuit board (11p); the through conductor is a through conductive plate; at least a portion of the through conductive plate is arranged side by side with the circuit board (11p) of the control system (11) along a width direction d2, and the portion and the second sampling terminal (11-1) are located on one side of the circuit board (11p) in the width direction d2 and are plugged with the second sampling terminal (11-1); the through conductive plate, the second sampling terminal (11-1) and the electromagnetic system (3-0) are arranged side by side along a height direction d3.

11. The circuit breaker according to claim 9, characterized in that: The main circuit structure also includes a signal terminal (12) connected to the control system (11), and the first terminal (8-0), the signal terminal (12) and the second terminal (8-1) are arranged side by side along the height direction d3.

12. The circuit breaker according to claim 5, characterized in that: In the length direction d1, the first terminal (8-0) and the third terminal (5-0) are arranged at one end of the circuit breaker, and the operating member (2) is arranged at the other end of the circuit breaker.

13. The circuit breaker according to claim 1, characterized in that: The operating member (2) has a closing position and an opening position, and the push rod (3-05) remains stationary during the process of the operating member (2) moving from the opening position to the closing position; the main circuit structure also includes a trigger mechanism (17) connected to the control system (11), and the trigger mechanism (17) is triggered by the operating member (2) moving to the closing position to send a first closing signal to the control system (11), and the control system (11) receives the first closing signal and controls the electromagnetic system (3-0) to drive the contact system (4) to close; the operating member (2) moves from the closing position to the opening position and drives the moving contact mechanism (4-1) to move through the push rod (3-05), so that the contact system (4) is opened.

14. The circuit breaker according to claim 13, characterized in that: The operating member (2) comprises an operating member body (2b) and an operating member connecting portion (2c); one end of the operating member body (2b) protrudes outside the housing (1) for external force operation and the other end is connected to the operating member connecting portion (2c); one end of the push rod (3-05) cooperates with the operating member connecting portion (2c) and is arranged to move relatively along the length direction d1.

15. The circuit breaker according to claim 14, characterized in that: The operating member connecting portion (2c) comprises a connecting portion cavity (2-1c); the push rod (3-05) comprises a front rod body (3-0500) and a front connecting cap (3-0501); the front connecting cap (3-0501) comprises a front brim, and the front brim protrudes radially from one side of the front rod body (3-0500) along the front rod body (3-0500); the front connecting cap (3-0501) is movably arranged in the connecting portion cavity (2-1c), and the side wall of the connecting portion cavity (2-1c) is transmission-coordinated with the front brim, and when the operating member (2) moves from the closing position to the opening position, the push rod (3-05) is driven to move so as to drive the moving contact mechanism (4-1) to move through the push rod (3-05) to disconnect the contact system (4).

16. The circuit breaker according to claim 1, characterized in that: The operating member (2) has a closing position and an opening position, and when switching between the closing position and the opening position, it directly drives the top rod (3-05) to move and drives the moving contact mechanism (4-1) and the static contact (4-2) to close and open.

17. The circuit breaker according to claim 16, characterized in that: The circuit breaker also includes a front connecting rod (3-1) connected to the operating member (2) and arranged to move synchronously, and one end of the top rod (3-05) is connected to the front connecting rod (3-1) and arranged to move relatively along the length direction d1.

18. The circuit breaker according to claim 17, characterized in that: The front connecting rod (3-1) comprises a front connecting rod cavity (3-110) and a front connecting rod insertion hole (3-111); the push rod (3-05) comprises a front rod body (3-0500) and a front connecting cap (3-0501); the outer diameter of the front connecting cap (3-0501) is greater than the outer diameter of the front rod body (3-0500); the front rod body (3-0500) is slidably inserted in the front connecting rod insertion hole (3-111) and the outer diameter of the front rod body (3-0500) is matched with the inner diameter of the front connecting rod insertion hole (3-111); the front connecting cap (3-0501) is arranged in the front connecting rod cavity (3-110) and the outer diameter of the front connecting cap (3-0501) is greater than the inner diameter of the front connecting rod insertion hole (3-111).

19. The circuit breaker according to claim 1, characterized in that: The circuit breaker further comprises an indicator (13) rotatably arranged in the middle of the operating member (2) and having a first indicating position and a second indicating position, the operating member (2) comprising an indicating hole (2-1) used in conjunction with the indicator (13); when the operating member (2) moves to the closing position, the indicator (13) is driven by the indicator driving structure of the circuit breaker to rotate to the first indicating position; when the operating member (2) moves to the opening position, the indicator (13) is driven by the indicator driving structure of the circuit breaker to rotate to the second indicating position.

20. The circuit breaker according to claim 1, characterized in that: The circuit breaker also includes a rear connecting rod (3-2), one end of the top rod (3-05) is transmission-connected to the operating member (2) and the other end is connected to the rear connecting rod (3-2) and moves synchronously, and the rear connecting rod (3-2) is also hinged to the contact support (4-10) of the moving contact mechanism (4-1).

21. The circuit breaker according to claim 20, characterized in that: The rear connecting rod (3-2) is provided with a rear connecting rod cavity (3-20) and a rear connecting rod insertion hole (3-21), the rear connecting rod insertion hole (3-21) is arranged on the side wall of the rear connecting rod cavity (3-20), the top rod (3-05) comprises a rear rod body (3-0510) and a rear connecting cap (3-0511), the outer diameter of the rear connecting cap (3-0511) is larger than the outer diameter of the rear rod body (3-0510), the inner diameter of the rear connecting rod insertion hole (3-21) is matched with the outer diameter of the rear rod body (3-0510) and is smaller than the outer diameter of the rear connecting cap (3-0511), the rear rod body (3-0510) is inserted in the rear connecting rod insertion hole (3-21) and the rear connecting cap (3-0511) is placed in the rear connecting rod cavity (3-20).

22. The circuit breaker according to claim 20, characterized in that: The rear connecting rod (3-2) is hinged to the contact support (4-10) via a rear connecting shaft (3-32); in the rear connecting rod (3-2) and the contact support (4-10), the rear connecting shaft (3-32) is arranged on one to move synchronously therewith, and the other is provided with a waist-shaped hole matching the rear connecting shaft (3-32).

23. The circuit breaker according to claim 1, characterized in that: The main circuit structure also includes an operating member reset spring (18), which acts on the operating member (2) to cause the operating member to have a tendency to move toward the opening position.

24. The circuit breaker according to claim 1, characterized in that: The moving contact mechanism (4-1) comprises two groups of moving contacts (4-11) arranged side by side along the width direction d2.

25. The circuit breaker according to claim 1, characterized in that: The housing (1) further comprises a signal window (1-4) and an operating member installation hole (1-6) respectively arranged on the same side wall of the housing (1), for inserting an operating member, the signal window (1-4) and the operating member installation hole (1-6) being arranged side by side along a height direction d3; the circuit breaker further comprises an indicating element connected to the control system (11), the indicating element cooperates with the signal window (1-4) to indicate the state of the circuit breaker.

26. The circuit breaker according to claim 1, characterized in that: The circuit breaker further comprises a first locking member (14) and a first locking member reset spring (16) which are slidably arranged in the housing (1) along the height direction d3. The first locking member reset spring (16) acts on the first locking member (14) to make it tend to move toward the outside of the housing (1) and makes the first locking protrusion (14-1) of the first locking member (14) protrude outside the housing (1). When the first locking protrusion (14-1) is pressed by an external force, the first locking member (14) moves toward the inside of the housing (1). When the circuit breaker is in an open state, the first locking member (14) is driven by the pulled operating member (2) to move toward the inside of the housing (1). The circuit breaker further comprises an unlocking mechanism (19), which is an unlocking rod, one end of which is directly or indirectly transmission-matched with the operating member 2 and the other end of which is transmission-matched with the first locking member (14).

27. The circuit breaker according to claim 1, characterized in that: The circuit breaker further comprises a second locking member (15) rotatably arranged on the housing (1), the second locking member (15) comprising a second locking protrusion (15-0); when the circuit breaker is closed, the second locking member (15) is driven by the operating member (2) to rotate in the forward direction so that the second locking protrusion (15-0) protrudes outside the housing (1); when the circuit breaker is opened, the second locking member (15) rotates in the reverse direction so that the second locking protrusion (15-0) moves toward the inside of the housing (1).

28. The circuit breaker according to claim 27, characterized in that: When the circuit breaker is opened, the second locking member (15) is driven by the operating member (2) moving toward the opening position to rotate in the reverse direction.

29. The circuit breaker according to claim 28, characterized in that: The circuit breaker further comprises a first locking member (14) and a first locking member reset spring (16) which are slidably arranged on the housing (1) along the height direction d3, wherein the first locking member reset spring (16) acts on the first locking member (14) to make it have a tendency to move toward the outside of the housing (1), and a first locking protrusion (14-1) of the first locking member (14) protrudes outside the housing (1); when the circuit breaker is in an open state, the first locking member (14) is driven by the pulled operating member (2) to move toward the inside of the housing (1); the second locking member (15) is in transmission cooperation with the first locking member (14); when the circuit breaker is open, the first locking member (14) is driven by the reversely rotating second locking member (15) to move toward the inside of the housing (1).

30. The circuit breaker according to claim 1, characterized in that: The electromagnetic system (3-0) is a magnetic holding system; the magnetic generating component (3-0m) comprises a coil component (3-01), a magnetic yoke (3-03) arranged around the coil component (3-01) and a permanent magnet (3-04); the permanent magnet (3-04) is sleeved on the outer side of the middle part of the coil component (3-01) and is located between the two electromagnetic coils of the coil component (3-01); the electromagnetic system (3-0) also comprises a moving iron core (3-02) slidably arranged in the middle part of the coil component (3-01); the moving iron core (3-02) The iron core (3-02) is connected to the push rod (3-05) and is arranged to move synchronously, and the two ends of the push rod (3-05) respectively protrude on both sides of the axial direction of the coil assembly (3-01); the electromagnetic system (3-0) also includes a first static iron core and a second static iron core that are arranged relatively along the axial direction of the coil assembly (3-01); when one end of the moving iron core (3-02) is attracted to the first static iron core, the push rod (3-05) is in the first position, and when the moving iron core (3-02) is attracted to the second static iron core, the push rod (3-05) is in the second position; The push rod (3-05) comprises a front push rod (3-050) and a rear push rod (3-051); one end of the front push rod (3-050) is inserted into the moving iron core (3-02) and the other end is transmission-connected to the operating member (2); one end of the rear push rod (3-051) is inserted into the moving iron core (3-02) and the other end is transmission-connected to the moving contact mechanism (4-1).

31. The circuit breaker according to claim 1, characterized in that: The length a of the shell (1) is 100 to 150 mm, the width b is 10 to 60 mm, and the height c is 38 to 45 mm.

32. The circuit breaker according to claim 31, characterized in that: The width b of the shell (1) is 10 mm, 15 mm, 20 mm, 30 mm or 60 mm.

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