Leakage protection module and circuit breaker

Abstract

A leakage test module, comprising a leakage test circuit and a circuit board powered by a main circuit, the leakage test circuit comprising a test button, a first elastic member and a second elastic member, the first elastic member and the second elastic member cooperating to form a breaking point of the leakage test circuit, the first elastic member being in contact with the second elastic member when the test button is pressed and the first elastic member is elastically deformed, the leakage test circuit further comprising a terminal block, the second elastic member being connected with the terminal block and the circuit board, and the terminal block being connected with the main circuit as a common power supply terminal of the leakage test circuit and the circuit board. A circuit breaker, comprising a housing and at least one circuit breaker pole arranged in the housing, and further comprising the leakage test module as described above. The terminal block is used as a power supply terminal of the circuit board and the leakage test circuit, and the second elastic member not only forms the breaking point but also connects the circuit board and the terminal block together, thereby reducing the amount of wires used, and having the advantages of simple structure, high reliability and small space occupation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of low-voltage electrical apparatus, in particular to a leakage test module and a circuit breaker. BACKGROUND

[0002] Low-voltage circuit breakers are used to distribute electric power and to protect lines and equipment from overload and short circuits, and also for infrequent transfer of lines and infrequent starting of motors. With the continuous development of Internet of Things technology and artificial intelligence technology, miniaturization and modularization of circuit breakers have become a trend.

[0003] At present, low-voltage circuit breakers usually have leakage protection and leakage test functions. During use, the user can press the test button to detect whether the leakage function is normal. The leakage test circuit usually has one or more breakpoints, and the breakpoints are connected to the power supply through wires. The circuit board cooperating with the leakage test circuit is also connected to the power supply through wires. In this way, the leakage test circuit and the circuit board have too many power supply wires, which occupies a large space in the circuit breaker, which is not conducive to the miniaturization design of the circuit breaker. SUMMARY

[0004] The purpose of the present application is to overcome the defects of the prior art and provide a leakage test module with simple structure and small space occupation, and a circuit breaker using the leakage test module.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] A leakage test module includes a leakage test circuit and a circuit board connected to the main circuit. The leakage test circuit includes a test button, a first elastic member and a second elastic member. The first elastic member and the second elastic member cooperate to form a breakpoint of the leakage test circuit. Pressing the test button causes the first elastic member to elastically deform and contact the second elastic member. The leakage test circuit also includes a terminal block. The second elastic member is connected to the terminal block and the circuit board. The terminal block is connected to the main circuit as a common power supply terminal of the leakage test circuit and the circuit board.

[0007] Preferably, the second end of the second elastic member elastically abuts the terminal block, and the first end of the second elastic member is inserted into the circuit board. The middle part of the second elastic member cooperates with the first elastic member to form the breakpoint of the leakage test circuit.

[0008] Preferably, the terminal block is provided with a connecting groove, and the second end of the second elastic member is elastically limited in the connecting groove and elastically abuts the terminal block.

[0009] Preferably, the second elastic member is arranged between the terminal board and the circuit board, the board surface of the terminal board and the board surface of the circuit board are arranged in a cross manner, the second end of the second elastic member extends into the connecting groove in a direction perpendicular to the terminal board and abuts against the side wall of the connecting groove, and the middle part of the second elastic member extends to between the circuit board and the first elastic member in a direction perpendicular to the board surface of the terminal board.

[0010] Preferably, the first end of the terminal board is used for connecting with the terminal of the circuit breaker, and the second end of the terminal board is provided with the connecting groove.

[0011] Preferably, the connecting groove penetrates the board surface of the terminal board, the opening of the connecting groove is inclined towards one side, and the closed end of the connecting groove is in the shape of a blunt circle with an inner diameter larger than that of the opening.

[0012] Preferably, the first elastic member is located on one side of the second elastic member, the first end of the first elastic member abuts against the test button, the first end of the first elastic member and the middle part of the second elastic member are spaced apart to form a breakpoint of the leakage test loop, and the second end of the first elastic member is electrically connected with the circuit board.

[0013] Preferably, the first elastic member comprises a first inclined surface, a second inclined surface and a connecting surface which are integrally formed, the connecting surface is connected between the first inclined surface and the second inclined surface, the middle part of the connecting surface is provided with a fixed mounting part, the second inclined surface serves as the second end of the first elastic member and is connected with the circuit board through a wire, the first inclined surface is located above the fixed boss, the middle part of the first inclined surface abuts against the test button, and the end part of the first inclined surface serves as the first end of the first elastic member and cooperates with the second elastic member to form the breakpoint.

[0014] Preferably, the second elastic member comprises a first connecting arm, a second connecting arm, a first straight section, a second straight section, an L-shaped connecting section and a bent connecting section,

[0015] the first end of the first connecting arm is connected with the second connecting arm, the middle part of the first connecting arm and the middle part of the second connecting arm are spaced apart to form the breakpoint in cooperation with the first elastic member, the first end of the first straight section is connected to the end of the first connecting arm in a direction perpendicular to the first connecting arm, the first end of the L-shaped connecting section is connected to the end of the first straight section perpendicularly, the end of the L-shaped connecting section is located on the side away from the second connecting arm, the plane where the first straight section and the L-shaped connecting section are located is perpendicular to the plane where the first connecting arm and the second connecting arm are located, and the end of the L-shaped connecting section serves as the first end of the second elastic member and is inserted into the circuit board.

[0016] the second straight section is connected to the end of the second connecting arm perpendicularly, the second straight section is parallel to the first straight section, the first end of the bent connecting section is connected to the end of the second straight section, the plane where the bent connecting section is located is parallel to the plane where the first connecting arm and the second connecting arm are located, and the end of the bent connecting section serves as the second end of the second elastic member and elastically abuts against the terminal board.

[0017] The application further provides a circuit breaker, comprising a shell and at least one circuit breaker pole arranged in the shell, and further comprising the leakage test module as described above.

[0018] The leakage test module and the circuit breaker using the leakage test module of the application have the wiring board as a power supply end of the line board and the leakage test circuit, and the second elastic member not only forms a break point but also connects the line board and the wiring board together, thereby reducing the wires connecting the leakage test circuit, the line board and the main circuit, and having the advantages of simple structure, high reliability and small space occupation.

[0019] In addition, the wiring board and the second elastic member are in elastic abutment, which can ensure the wiring and the assembly respectively, and in particular, the wiring board is provided with a connecting groove, the second end of the second elastic member extends into the connecting groove and abuts against the connecting groove, thereby further ensuring the stability of the wiring. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of a circuit breaker in the application;

[0021] Figure 2 is a structural schematic diagram of an L pole in the application;

[0022] Figure 3 is a structural schematic diagram of an N pole in the application;

[0023] Figure 4 is a structural schematic diagram of a leakage protection module in the application;

[0024] Figure 5 is a structural schematic diagram of a leakage test module in the application;

[0025] Figure 6 is a schematic diagram of elastic abutment between a wiring board and a second elastic member in the application;

[0026] Figure 7 is a structural schematic diagram of a second elastic member in the application;

[0027] Figure 8 is a structural schematic diagram of a first elastic member in the application. DETAILED DESCRIPTION

[0028] The following embodiments are given in conjunction with the accompanying Figures 1-8 The embodiments of the leakage test module and the circuit breaker of the application are further described below. The leakage test module and the circuit breaker of the application are not limited to the following embodiments.

[0029] The leakage test module comprises a leakage test circuit and a circuit board 35 powered by a main circuit, the leakage test circuit comprises a test button 33, a first elastic member 31 and a second elastic member 32, the first elastic member 31 and the second elastic member 32 cooperate to form a break point of the leakage test circuit, the first elastic member 31 is in contact with the second elastic member 32 by being pressed to form an elastic deformation, so as to connect the break point of the leakage test circuit, the leakage test circuit further comprises a terminal block 34, the second elastic member 32 is connected with the terminal block 34 and the circuit board 35, the terminal block 34 is connected with the main circuit as a common power supply terminal of the leakage test circuit and the circuit board 35, and the first elastic member 31 is connected with the circuit board 35 for power supply.

[0030] The leakage test module of the application and the leakage protection module 3 and the circuit breaker using the leakage test module, the terminal block 34 is used as a power supply terminal of the circuit board 35 and the leakage test circuit, the second elastic member 32 connects the circuit board 35 and the terminal block 34 together, the number of wires connecting the leakage test circuit, the circuit board 35 and the main circuit is reduced, and the leakage test module has the advantages of simple structure, high reliability and small space occupation.

[0031] In combination Figures 1-8 Provided is an embodiment of a circuit breaker, which comprises a shell, at least one circuit breaker pole 2 is arranged in the shell, preferably the shell comprises at least one mounting cavity, each circuit breaker pole 2 is arranged in one mounting cavity, when a plurality of mounting cavities are arranged in the shell, the shell can comprise a plurality of partitions fixedly arranged in the shell, the mounting cavities are formed by the space between two adjacent partitions, or the shell comprises a cover, a base and partitions assembled between the cover and the base, one mounting cavity is formed by the cover and one partition, another mounting cavity is formed by the base and another partition, and the remaining partitions are arranged to form a plurality of independent mounting cavities, two adjacent mounting cavities are assembled by the partitions; or the shell is assembled by a plurality of independent unit shells, each unit shell comprises a cover and a base which form one mounting cavity.

[0032] A phase main circuit is arranged in each circuit breaker pole 2, that is, N-phase main circuits or one-phase L-phase main circuits are arranged in each circuit breaker pole 2, each phase main circuit is connected between a pair of terminal blocks 41, of course, L-phase main circuits and N-phase main circuits can also be arranged in the same circuit breaker pole 2, the embodiment takes two circuit breaker poles 2 as an example, only one phase main circuit is arranged in each circuit breaker pole 2, that is, one circuit breaker pole 2 is arranged with an L-phase main circuit as an L pole 2L, and the other circuit breaker pole 2 is arranged with an N-phase main circuit as an N pole 2N, the L-phase main circuit and the N-phase main circuit form the main circuit of the circuit breaker.

[0033] A leakage protection module 3 is arranged in one mounting cavity of the shell, as shown inFigure 1 、 4 As shown in the figure, the leakage protection module 3 is located in a mounting cavity adjacent to the L pole 2L, and a wiring terminal 41 is arranged at one end of the mounting cavity where the leakage protection module 3 is arranged, that is, the wiring terminal 41 corresponding to the L-phase main line and the N-phase main line are arranged side by side at one end of the mounting cavity.

[0034] As shown in the figure, Figure 4 、 5 The leakage protection module 3 further comprises a leakage detection circuit and a leakage tripping mechanism, the leakage tripping mechanism comprises a tripping device 36 driven by the leakage detection circuit, and the leakage detection circuit comprises a circuit board 35 and a mutual inductor connected to the circuit board 35, the mutual inductor is coupled with the L-phase main line and the N-phase main line for detecting a leakage signal, and when the leakage detection circuit detects a leakage fault, the top rod of the tripping device 36 can be driven to act, and after the top rod completes the action, the top rod is driven to reset by the reset spring of the tripping device 36, Figure 4 The tripping device 36 is arranged in the upper part of the leakage protection module 3 in the horizontal direction, and a push plate 38 and an indicating element 37 are arranged on the side of the top rod of the tripping device 36, an avoiding hole is arranged on the side wall of the mounting cavity corresponding to the push plate 38, and the linkage part of the adjacent circuit breaker pole 2 passes through the avoiding hole and cooperates with the push plate 38, when a leakage fault occurs, the tripping device 36 triggers the push plate 38 to rotate, so that the linkage part drives the lock to rotate and thus the operating pole is tripped, and the indicating element 37 acts to indicate the leakage.

[0035] As shown in the figure, Figure 4 、 5 The leakage protection module 3 further comprises a leakage test module, and the leakage test module comprises a circuit board 35 and a leakage test circuit, wherein the circuit board 35 and the leakage test circuit are respectively powered from the main circuit, that is, one end of the circuit board 35 and the leakage test circuit is connected with the L-phase main line, and the other end is connected with the N-phase main line, and in this embodiment, the circuit board 35 also belongs to the leakage detection circuit.

[0036] The leakage test circuit comprises a test button 33, a first elastic member 31 and a second elastic member 32, a button groove 11 is arranged on the shell, the button groove 11 is arranged at the upper portion of the mounting cavity for assembling the leakage protection module 3, preferably a fixing boss 12 is arranged correspondingly below the button groove 11, the test button 33 is slidingly assembled in the button groove 11, one end of the test button 33 extending into the shell is located above the fixing boss 12, the first elastic member 31 and the second elastic member 32 are respectively located on the two sides of the fixing boss 12, the breakpoint of the leakage test circuit is formed by cooperation of the first elastic member 31 and the second elastic member 32, the second end of the first elastic member 31 extends to the side close to the second elastic member 32 and abuts against the test button 33, the first elastic member 31 is deformed by pressing the test button 33, the test button 33 drives the first elastic member 31 to contact the second elastic member 32, at this time, the breakpoint of the leakage test circuit can be connected, the leakage current is generated in the leakage test circuit, after the transformer detects the leakage signal, the leakage release mechanism is driven by the circuit board 35 to act, and the leakage test is completed.

[0037] The improvement of the present application is that the leakage test circuit further comprises a wiring board 34, one end of the wiring board 34 is connected with the main circuit for power taking, that is, one end of the wiring board 34 is connected with the wiring terminal 41 of the corresponding L-phase main circuit or N-phase main circuit in the leakage protection module 3, the other end of the wiring board 34 is connected with the circuit board 35 through the second elastic member 32, at this time, the wiring board 34 is connected with the main circuit as the common power taking end of the leakage test circuit and the leakage detection circuit, the first elastic member 31 is connected with the circuit board 35, so that the leakage test circuit takes power from the circuit board 35, in this way, it can avoid that too many power taking wires are arranged for the leakage test circuit and the leakage detection circuit, that is, the wires connected with the main circuit for the leakage test circuit, the circuit board 35 and the main circuit are reduced, and the advantages of simple structure, high reliability and small space occupation are achieved.

[0038] It should be noted that, in addition to the breakpoint formed by the first elastic member 31 and the second elastic member 32, the leakage test circuit can further be provided with other breakpoints formed by non-first elastic members 31 and non-second elastic members 32, such as a second breakpoint driven by a handle or an operating mechanism, which all belong to the protection scope of the present application. In addition, the first elastic member 31 can be directly or indirectly electrically connected with the circuit board 35.

[0039] Further, the second end 322 of the second elastic member 32 is elastically abutted against the wiring board 34, which can ensure wiring and facilitate assembly, preferably, the wiring board 34 is provided with a connecting groove 341, the second end 322 of the second elastic member 32 is elastically limited in the connecting groove 341, further ensuring stable wiring, the first end 321 of the second elastic member 32 is inserted into the circuit board 35, the breakpoint of the leakage test circuit is formed by cooperation of the middle portion of the second elastic member 32 and the first elastic member 31, and the wiring operation of the second elastic member 32 is simplified.

[0040] In particular, the second elastic member 32 is arranged between the wiring board 34 and the circuit board 35, the plate surface of the wiring board 34 and the plate surface of the circuit board 35 are arranged in a cross manner, preferably, the plate surface of the wiring board 34 and the plate surface of the circuit board 35 are perpendicular to each other, the second end 322 of the second elastic member 32 extends into the connecting groove 341 along a direction perpendicular to the wiring board 34 and abuts against the side wall of the connecting groove 341, the middle part of the second elastic member 32 extends to between the circuit board 35 and the first elastic member 31 along a direction perpendicular to the plate surface of the wiring board 34, at this time, the middle part of the second elastic member 32 and the first elastic member 31 are respectively located on two sides of the fixing boss 12, preferably, the middle part of the first elastic member 31 is fixed to the fixing boss 12, the first end of the first elastic member 31 is located below the test button 33 and abuts against the test button 33, the first end of the first elastic member 31 and the middle part of the second elastic member 32 are spaced apart to form a breakpoint of the leakage test loop, and the second end of the first elastic member 31 is electrically connected to the circuit board 35, so that the first elastic member 31 and the second elastic member 32 are arranged along the gap inside the shell, which is beneficial to reducing the space occupied by the leakage test loop. It should be noted that, of course, the first elastic member 31 and the second elastic member 32 can be cooperatively arranged to form one breakpoint or multiple breakpoints, and the embodiment is only exemplified by the first elastic member 31 and the second elastic member 32 forming one breakpoint.

[0041] In combination Figure 1 , 4 -8, the specific structure of the test button 33, the wiring board 34, the first elastic member 31 and the second elastic member 32 in the leakage test loop is introduced.

[0042] As shown in Figure 1 , 4 , 5 and 8, the test button 33 comprises a push head and a push rod, the push rod is slidingly assembled in the button groove 11 of the shell, the push head is located outside the button groove 11, a stop plate is arranged at the connection between the push head and the push rod, a spring is arranged on the outer side of the push rod, the two ends of the spring are respectively matched with the stop plate and the shell, the stop plate is clamped at the edge of the button groove 11 to prevent the test button 33 from being pulled out, the push rod extends above the first elastic member 31, a push inclined surface is arranged at the end of the push rod, the test button 33 is pressed to make the push inclined surface abut against the second end of the first elastic member 31 to elastically deform, so that the breakpoint of the leakage test loop is connected.

[0043] As shown in Figures 4-6As shown, the first end of the terminal block 34 is used to connect with the terminal 41 of the circuit breaker, and the second end of the terminal block 34 is provided with a connecting groove 341 penetrating the surface of the terminal block 34, and the second elastic member 32 is elastically abutted with the connecting groove 341, which can not only ensure the connection but also facilitate the assembly, simplifying the connection between the second elastic member 32 and the connecting groove 341, reducing the number of connection wires, and limiting the second end of the second elastic member 32 by the connecting groove 341 to ensure the stability of the connection.

[0044] As shown in Figure 5 , the middle part of the terminal block 34 is bent to form a "Z" shaped plate structure, that is, the terminal block 34 includes a first connecting plate, a second connecting plate and a third connecting plate connected in sequence, wherein the first connecting plate and the third connecting plate are arranged along the horizontal direction in the drawing, and the second connecting plate is arranged along the vertical direction in the drawing, and the second connecting plate can be regarded as the middle part of the terminal block 34 being bent, wherein the end of the first connecting plate away from the second connecting plate is connected with the terminal 41 of the circuit breaker as the first end of the terminal block 34, and the end of the third connecting plate away from the second connecting plate is the second end of the terminal block 34, and the connecting groove 341 is provided on the third connecting plate.

[0045] The connecting groove 341 penetrates the surface of the terminal block 34, the opening of the connecting groove 341 is inclined to one side, and the closed end of the connecting groove 341 is a blunt circular shape with a larger inner diameter than the opening. The second end 322 of the second elastic member 32 is vertically inserted into the connecting groove 341 in a direction perpendicular to the surface of the terminal block 34, and the inclined connecting groove 341 makes the second elastic member 32 not easy to fall off, and the blunt circular closed end can limit and abut the second end 322 of the second elastic member 32.

[0046] As shown in Figure 4 , 5 and 8, the first elastic member 31 includes a first inclined surface 311, a second inclined surface 312 and a connecting surface 313 integrally formed, the connecting surface 313 is connected between the first inclined surface 311 and the second inclined surface 312 to form a trapezoidal structure of the first elastic member 31, which can be arranged along one side of the fixed boss 12, and the middle part of the connecting surface 313 is provided with a fixed mounting part, wherein the fixed mounting part is a groove structure or a boss structure, and correspondingly, the fixed boss 12 is provided with a boss structure or a groove structure matched with the fixed mounting part, so that the first elastic member 31 and the fixed boss 12 are fixed by concave-convex matching, of course, other fixing methods can also be used; the second end of the second inclined surface 312 is connected with the circuit board 35 through a wire, the first inclined surface 311 is located above the fixed boss 12, the middle part of the first inclined surface 311 abuts against the test button 33, and the end of the first inclined surface 311 serves as the first end of the first elastic member 31 to form a break point with the second elastic member 32.

[0047] As shown in Figures 4-7As shown, the second elastic member 32 includes a first connecting arm 32a, a second connecting arm 32b, a first straight section 32c, a second straight section 32d, an L-shaped connecting section, and a bent connecting section. The first connecting arm 32a is connected to the first end of the second connecting arm 32b. The middle part of the first connecting arm 32a is spaced apart from the middle part of the second connecting arm 32b and cooperates with the first elastic member 31 to form a break. The first end of the first straight section 32c is connected to the end of the first connecting arm 32a in a direction perpendicular to the first connecting arm 32a. The first end of the L-shaped connecting section is perpendicularly connected to the end of the first straight section 32c. The end of the L-shaped connecting section is parallel to the first straight section 32c and located on the side away from the second connecting arm 32b. The plane containing the first straight section 32c and the L-shaped connecting section is parallel to the first connecting arm 32a and the second connecting arm 32b. The planes on which the first connecting arm 32a and the first connecting arm 32b are perpendicular, with the end of the L-shaped connecting segment serving as the first end 321 of the second elastic element 32, which is inserted into the circuit board 35. The second straight segment 32d is perpendicularly connected to the end of the second connecting arm 32b, and the second straight segment 32d is parallel to the first straight segment 32c. The first end of the bent connecting segment is connected to the end of the second straight segment 32d. The plane on which the bent connecting segment is located is parallel to the plane on which the first connecting arm 32a and the second connecting arm 32b are located. The end of the bent connecting segment serves as the second end 322 of the second elastic element 32, which elastically abuts against the terminal block 34. Preferably, the first connecting arm 32a, the second connecting arm 32b, the first straight segment 32c, the second straight segment 32d, the L-shaped connecting segment, and the bent connecting segment are made of an integrally formed elastic material. This structure of the second elastic element 32 can make full use of the internal space.

[0048] like Figure 2 , 3 As shown, in this embodiment, the structures of L-pole 2L and N-pole 2N are similar, with... Figure 2 , 3 Taking circuit breaker pole 2 as an example, the circuit breaker pole 2 includes a pair of terminals 41 connected to a phase main line, and a handle mechanism 42, an operating mechanism 43, and a contact mechanism 44 connected in sequence. The pair of terminals 41 includes an incoming terminal and an outgoing terminal. The contact mechanism 44 includes a moving contact and a stationary contact that cooperate with each other. The moving contact is linked to the operating mechanism 43, and the stationary contact is fixedly mounted on the side opposite to the moving contact. By manually operating the handle mechanism 42, the operating mechanism 43 is driven to separate or contact the moving contact and the stationary contact to realize the on / off control of the main line in the circuit breaker pole 2. In addition, each circuit breaker pole 2 is also equipped with an arc extinguishing system 45 and a short-circuit protection mechanism 46 and / or an overload protection mechanism 47 that cooperate with the operating mechanism 43. The arc extinguishing system 45 is installed on one side of the contact mechanism 44 to extinguish the electric arc generated by the moving contact and the stationary contact during the opening and closing process. The short-circuit protection mechanism 46 or the overload protection mechanism 47 are respectively used to trigger the operating mechanism 43 to trip when a short circuit or overload fault occurs in the main line.

[0049] In the embodiment, a pair of line terminals 41 are arranged at two ends of the circuit breaker pole 2 respectively, the line terminals (outlet terminals) of the adjacent two circuit breaker poles 2 are located at the same end of the shell, the handle mechanism 42 is rotatably arranged at the upper part of the shell, the operating mechanism 43 is arranged at one side of the handle mechanism 42, the handle mechanism 42 and the operating mechanism 43 are connected through the connecting rod, the movable contact is connected to the lower part of the operating mechanism 43, the operating mechanisms 43 and the handle mechanisms 42 of the adjacent two circuit breaker poles 2 are connected through the connecting rod respectively, the arc extinguishing chamber of the arc extinguishing system 45 and the fixed contact are fixed to the middle part of the shell, wherein the fixed contact is opposite to the movable contact, the short-circuit protection mechanism 46 is arranged between the handle mechanism 42 and the arc extinguishing chamber, one end of the short-circuit protection mechanism 46 is opposite to the operating mechanism 43, the overload protection mechanisms 47 are arranged at two sides of the operating mechanism 43 respectively, one end of the overload protection mechanism 47 is matched with the operating mechanism 43, as shown in the figure, the overload protection mechanism 47 is not arranged in the N pole 2N. Figure 3

[0050] In the embodiment, the operating mechanism 43 of each circuit breaker pole 2 comprises a lever rotatably arranged in the shell, the lever can be rotatably connected with the side wall of the shell or the partition plate in the shell, a jump buckle and a lock buckle are rotatably arranged on the lever, the movable contact is rotatably installed through the contact support and is connected with the lever, the jump buckle is matched with the lock buckle through the snap buckle, the other end of the jump buckle is connected with the connecting rod, the lock buckle is provided with a linkage part in the form of a rod, an avoiding hole is arranged on the partition plate or the side wall of the shell corresponding to the linkage part, one end of the linkage part can pass through the avoiding hole and extend into an adjacent installation cavity; an energy storage spring is arranged between the lever and the contact support, two elastic arms of the energy storage spring are respectively abutted with the contact support and the lever, and preferably the energy storage spring is a torsional spring coaxially rotatably arranged with the contact support.

[0051] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship when used, and are only for the convenience of description, and cannot be understood as indicating that the device or element referred to must have a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0052] The above is a further detailed description of the present application in combination with a specific preferred embodiment, and cannot be considered as limiting the specific implementation of the present application. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be considered as falling within the protection scope of the present application.​

Claims

1. A leakage current protection module, comprising a leakage current testing module disposed in an installation cavity, the leakage current testing module comprising a leakage current testing circuit and a circuit board (35) drawing power from a main circuit, the leakage current testing circuit comprising a test button (33), a first elastic element (31) and a second elastic element (32), the first elastic element (31) and the second elastic element (32) cooperating to form a break point in the leakage current testing circuit, pressing the test button (33) causes the first elastic element (31) to undergo elastic deformation and contact the second elastic element (32), characterized in that: The installation cavity is provided with two terminal blocks (41) corresponding to the L-phase main line and the N-phase main line at one end, and the leakage test circuit further comprises a terminal block (34), the first end of the terminal block (34) is used for being connected with the terminal block (41), the second end of the terminal block (34) is provided with a connecting groove (341), the second elastic member (32) is arranged between the terminal block (34) and the circuit board (35), the first end (321) of the second elastic member (32) is inserted into the circuit board (35), the middle part of the second elastic member (32) cooperates with the first elastic member (31) to form a breakpoint of the leakage test circuit, the second end (322) of the second elastic member (32) is elastically limited in the connecting groove (341) and elastically abuts against the terminal block (34), and the terminal block (34) is connected with the main circuit as a common power supply end of the leakage test circuit and the circuit board (35).

2. The arc fault protection module of claim 1, wherein: The surface of the terminal block (34) is arranged in cross with the surface of the circuit board (35), the second end (322) of the second elastic member (32) extends into the connecting groove (341) in a direction perpendicular to the terminal block (34) and abuts against the side wall of the connecting groove (341), and the middle part of the second elastic member (32) extends to between the circuit board (35) and the first elastic member (31) in a direction perpendicular to the surface of the terminal block (34).

3. The arc fault protection module of claim 1, wherein: The connecting groove (341) penetrates the surface of the terminal block (34), the opening of the connecting groove (341) is inclined to one side, and the closed end of the connecting groove (341) is a blunt circle with a larger inner diameter than the opening.

4. The arc fault protection module of claim 1, wherein: The first elastic member (31) is located on one side of the second elastic member (32), the first end of the first elastic member (31) abuts against the test button (33), the first end of the first elastic member (31) and the middle part of the second elastic member (32) are spaced apart to form a breakpoint of the leakage test circuit, and the second end of the first elastic member (31) is electrically connected with the circuit board (35).

5. The arc fault protection module of claim 1, wherein: The leakage protection module (3) further comprises a leakage detection circuit and a leakage tripping mechanism, the leakage tripping mechanism comprises a tripping device (36) driven by the leakage detection circuit, the leakage detection circuit comprises a mutual inductor connected with the circuit board (35), the tripping device (36) is arranged at the upper part of the leakage protection module (3) in the horizontal direction, a push plate (38) and an indicating element (37) are arranged on the side of the top rod of the tripping device (36), an avoiding hole is arranged on the side wall of the installation cavity corresponding to the push plate (38), the linkage part of the adjacent circuit breaker pole (2) passes through the avoiding hole and cooperates with the push plate (38), when a leakage fault occurs, the tripping device (36) triggers the push plate (38) to rotate, so that the circuit breaker pole (2) is tripped, and the indicating element (37) acts to indicate the leakage.

6. The arc fault protection module of claim 1, wherein: The first elastic member (31) comprises a first inclined surface (311), a second inclined surface (312) and a connecting surface (313), the connecting surface (313) is connected between the first inclined surface (311) and the second inclined surface (312), the middle part of the connecting surface (313) is provided with a fixed mounting part, the second inclined surface (312) is connected with the circuit board (35) through a lead wire as a second end of the first elastic member (31), the first inclined surface (311) is located above the fixed boss (12), the middle part of the first inclined surface (311) abuts against the test button (33), and the end part of the first inclined surface (311) is used as a first end of the first elastic member (31) and cooperates with the second elastic member (32) to form a breakpoint.

7. The arc fault protection module of claim 1, wherein: The second elastic member (32) comprises a first connecting arm (32a), a second connecting arm (32b), a first flat section (32c), a second flat section (32d), an L-shaped connecting section and a bent connecting section. The first connecting arm (32a) is connected with the first end of the second connecting arm (32b), the middle part of the first connecting arm (32a) is opposite to the middle part of the second connecting arm (32b) and cooperates with the first elastic member (31) to form a breakpoint, the first end of the first flat section (32c) is connected with the end of the first connecting arm (32a) in a direction perpendicular to the first connecting arm (32a), the first end of the L-shaped connecting section is connected with the end of the first flat section (32c) perpendicularly, the end of the L-shaped connecting section is located on a side away from the second connecting arm (32b), the plane where the first flat section (32c) and the L-shaped connecting section are located is perpendicular to the plane where the first connecting arm (32a) and the second connecting arm (32b) are located, and the end of the L-shaped connecting section is used as a first end (321) of the second elastic member (32) and is inserted into the circuit board (35); The second flat section (32d) is connected with the end of the second connecting arm (32b) perpendicularly, the second flat section (32d) is parallel to the first flat section (32c), the first end of the bent connecting section is connected with the end of the second flat section (32d), the plane where the bent connecting section is located is parallel to the plane where the first connecting arm (32a) and the second connecting arm (32b) are located, and the end of the bent connecting section is used as a second end (322) of the second elastic member (32) and elastically abuts against the wiring board (34).

8. A circuit breaker comprising a housing and at least one circuit breaker pole (2) arranged in the housing, characterized in that: The electric leakage protection module also comprises the electric leakage protection module according to any one of claims 1-7.

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