A leakage circuit breaker

Abstract

The present invention is a leakage circuit breaker, comprising an N-level housing and an L-level housing, an intermediate housing is arranged between the N-level housing and the L-level housing, the N-level circuit breaker part where the N-level housing is located and the L-level circuit breaker part where the L-level housing is located share an operating mechanism, the N-level circuit breaker and the L-level circuit breaker are disconnected at the same time, the operating mechanism is fixed on the intermediate housing, the operating mechanism comprises a moving contact bracket, a first moving contact and a second moving contact, and the first moving contact and the second moving contact are located on both sides of the moving contact bracket. In the present invention, by adopting a set of operating mechanisms, the two-level circuit breakers are closed and disconnected at the same time, the accessories are reduced, and the volume can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a leakage circuit breaker. Background Art

[0002] The leakage circuit breaker usually includes a housing, a live wire circuit breaker unit and a neutral wire circuit breaker unit. The live wire circuit breaker unit includes a live wire operating mechanism, a live wire tripping mechanism, a live wire moving contact, a live wire static contact, a live wire arc extinguishing cover and a live wire terminal. The neutral wire circuit breaker unit includes a neutral wire operating mechanism, a neutral wire tripping mechanism, a neutral wire moving contact, a neutral wire static contact and a neutral wire terminal. A large amount of arc will be generated when the live wire moving contact and the live wire static contact are in contact. The arc extinguishing function is achieved by setting the live wire arc extinguishing cover to ensure the breaking capacity and power safety of the circuit breaker. A small amount of arc will be generated when the neutral wire moving contact and the neutral wire static contact are in contact. However, the existing leakage circuit breaker does not have the function of extinguishing the arc on the neutral wire circuit breaker unit. In the long run, the surfaces of the neutral wire moving contact and the neutral wire static contact will be burned by the arc, and in severe cases, the contacts may even fail, thereby affecting the breaking capacity and service life of the leakage circuit breaker.

[0003] In addition, most of the existing leakage circuit breakers adopt double operating mechanisms, and the live wire and the neutral wire adopt separate operating mechanisms, which have a relatively complex structure and a large size. Summary of the invention

[0004] The object of the present invention is to provide a leakage circuit breaker to solve the above problems.

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

[0006] A leakage circuit breaker, characterized in that it comprises an N-level housing and an L-level housing, an intermediate housing is arranged between the N-level housing and the L-level housing, the N-level circuit breaker part where the N-level housing is located and the L-level circuit breaker part where the L-level housing is located share an operating mechanism, and the N The N-level circuit breaker and the L-level circuit breaker are disconnected at the same time, the operating mechanism is fixed on the intermediate housing, the operating mechanism includes a moving contact bracket, a first moving contact and a second moving contact, the first moving contact and the second moving contact are located on both sides of the moving contact bracket, the first moving contact is located on the side close to the N-level circuit breaker, and the second moving contact is located on the side close to the L-level circuit breaker, the lower end of the moving contact bracket is formed with a first hinge shaft and a second hinge shaft respectively, the first hinge shaft is hingedly arranged with the first moving contact, and the second hinge shaft is hingedly arranged with the second moving contact, the operating mechanism also includes an operating handle, a jump buckle, a lock buckle and a tension spring, a linkage rod is arranged between the operating handle and the jump buckle, the jump buckle is hinged on the upper end part of the moving contact bracket, the lock buckle is rotatably arranged in the middle position of the moving contact bracket, and the lock buckle extends to one side of the jump buckle to cooperate with the jump buckle to limit the rotation of the jump buckle, one end of the tension spring is connected to the N-level housing, and the other end is connected to the moving contact bracket.

[0007] The present invention is further provided that the lock includes a resistance portion that resists the jumper, a hinge portion, and a first indicator block and a second indicator block, the resistance portion is arranged close to the jumper, the hinge portion is hinged to the moving contact bracket, the first indicator block is arranged close to the first moving contact, and the second indicator block is arranged close to the second moving contact, the first indicator block and the second indicator block are used to indicate the lock position, and the corresponding N-level shell and L-level shell are provided with indicator block observation holes.

[0008] The present invention is further arranged that a first arc extinguishing system is arranged between the L-level shell and the intermediate shell, and a second arc extinguishing system is arranged between the N-level shell and the intermediate shell, the first arc extinguishing system includes a first arc extinguishing cover and a first arc extinguishing sheet arranged in the first arc extinguishing cover, the first arc extinguishing cover is formed by connecting a first side plate, a second side plate and a third side plate, the first side plate and the second side plate are arranged in parallel, the third side plate is located at one end of the first side plate and the second side plate, the third side plate is arranged with gas producing holes, and the first arc extinguishing sheets are arranged in number of 9-11.

[0009] The present invention further provides that the second arc extinguishing system includes a second arc extinguishing hood and a second arc extinguishing sheet arranged in the second arc extinguishing hood, the second arc extinguishing hood is formed by connecting a fourth side plate, a fifth side plate and a sixth side plate, the fourth side plate is arranged in parallel with the fifth side plate, and the sixth side plate is located at one end of the fourth side plate and the fifth side plate. The sixth side plate is provided with a gas-generating hole, and the number of the second arc extinguishing sheets is set to 14.

[0010] The present invention further provides that a first air outlet is provided between the intermediate shell and the L-level shell, a second air outlet is formed between the intermediate shell and the N-level shell, the first air outlet is located on a side close to the third side plate, and the second air outlet is located on a side close to the sixth side plate.

[0011] The present invention is further provided that an integrated coil assembly is also provided on one side of the operating mechanism, and the integrated coil assembly includes a leakage coil and an air-disconnected coil, the air-disconnected coil is located on one side of the leakage coil, and the two are coaxially arranged by a top rod, the leakage coil is arranged on a magnetic yoke, and a leakage coil skeleton for fixing the leakage coil is arranged on the magnetic yoke, a first moving iron core and a static iron core are arranged in the leakage coil skeleton, the top rod extends from one end of the static iron core through the first moving iron core to the second moving iron core of the air-disconnected coil, a first fixing plate and a second fixing plate are provided at both ends of the air-disconnected coil, the second moving iron core is located inside the air-disconnected coil, and a first slot connected to the top rod is opened on one side of the second moving iron core, the first slot is clearance-matched with the top rod, and the second fixing plate is arranged close to one side of the magnetic yoke and fixedly connected to the magnetic yoke.

[0012] The present invention is further provided that the push rod includes a front end push rod and a rear end push rod, the front end push rod passes through the first moving iron core and is connected to the first slot of the second moving iron core, the front end push rod and the first slot are clearance fit, the first moving iron core is penetrated by a through hole, the front end push rod and the through hole are clearance fit, the diameter of the rear end push rod is larger than the diameter of the front end push rod, and a spring is provided on the rear end push rod.

[0013] The present invention is further configured to include a test device, which is arranged on the N-level shell and includes a test button, a conductive piece located below the test button, and a conductive ring. The conductive piece is electrically connected to the conductive ring under the action of the test button. The conductive piece is fixedly arranged on a mounting platform formed in the N-level shell, and a mounting piece for fixing the conductive ring is formed at one end of the mounting platform. The pressing surface of the test button is flush with the upper end surface of the N-level shell.

[0014] The present invention is further arranged that the mounting platform and the mounting piece are integrally formed in an N-level shell, the mounting piece is a columnar structure, the conductive ring is sleeved on the mounting piece, the conductive piece is clamped on the mounting platform, the conductive piece includes a fixed end and a contact end, the contact end is formed on one side of the fixed end, the contact end is an elastic spring, the contact end extends from the fixed end side to the test button side, and the conductive ring is located below the contact end.

[0015] The present invention is further provided that the contact end includes a first connecting section, a second connecting section and a contact end connected to the fixed end, the contact end is an arc-shaped structure, the bending direction of the arc-shaped structure is toward one side of the guide ring, the first connecting section and the second connecting section are both inclined, and the slope of the first connecting section is greater than the slope of the second connecting section, the fixed end includes a fixed plate and a vertical plate perpendicular to both sides of the fixed plate, a first stop block, a second stop block and a fixed block are formed on the mounting platform, the first stop block and the second stop block are located on both sides of the fixed block, a first limiting groove is formed between the first stop block and the fixed block, and a second limiting groove is formed between the second stop block and the fixed block, and when the contact end is installed, the vertical plate is respectively located in the first limiting groove and the second limiting groove, and the fixed plate is located above the fixed block.

[0016] The present invention includes at least one of the following beneficial effects:

[0017] 1- In the present invention, a set of operating mechanisms is adopted to achieve simultaneous closing and disconnection of two-stage circuit breakers, reduce accessories, and reduce volume.

[0018] 2- The N-level and L-level arc extinguishing systems in the leakage circuit breaker are respectively used to improve the breaking capacity and arc extinguishing effect; the volume of the first arc extinguishing system of the L-level is larger than the second arc extinguishing system of the N-level, which can ensure the arc extinguishing effect while realizing the miniaturization of the overall structure.

[0019] 3-By adopting an integrated coil structure, the leakage coil and the circuit breaker coil are arranged side by side, and leakage protection and circuit breaker protection are achieved through a top rod.

[0020] 4- A new test device is used, and its structure and distribution are also different from the existing technology. Most of the existing technologies are torsion springs. External force acts on one of the torsion spring arms, and then the torsion spring rotates, and the other torsion spring arm is connected to the conductive ring; this causes the conductive ring and the torsion spring in the prior art to be far apart, and the conduction speed is slow; while the present invention realizes the vertical distribution of the test button, the conductive part and the conductive ring, which can achieve fast conduction and has a good conduction effect. Secondly, the pressing surface of the test button is kept flush with the upper end surface of the base, so that the height of the test button is reduced, and the problem of misoperation caused by the height will not occur; a conductive part different from the torsion spring is used, including a fixed end and a contact end, which not only ensures the stability of the conductive part, but also ensures the conduction effect of the contact end. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 Schematic diagram of the explosion of the embodiment of the present invention Figure 1 ;

[0023] Figure 2 Schematic diagram of the explosion of the embodiment of the present invention Figure 2 ;

[0024] Figure 3 It is a schematic diagram of the structure of a jump button in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of an embodiment of the present invention without the L-level housing;

[0026] Figure 5 This is a schematic diagram of a structure in which the N-level housing is removed according to an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of a first arc extinguishing system according to an embodiment of the present invention;

[0028] Figure 7 is a schematic diagram of a second arc extinguishing system according to an embodiment of the present invention;

[0029] Figure 8 The three-dimensional embodiment of the present invention Figure 1 ;

[0030] Fig. 9 Schematic diagram of an integrated coil in an embodiment of the present invention.

[0031] Fig.10 The three-dimensional embodiment of the present invention Figure 2 ;

[0032] Fig.11 The structure of the test device in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0033] Fig.12 The structure of the test device in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0034] Fig.13 is a top view of an embodiment of the present invention;

[0035] Fig.14 for Fig.13 Sectional view at AA in the middle;

[0036] Fig.15 A three-dimensional diagram of an embodiment of the present invention using the bottom line feeding function;

[0037] Fig.16 This is an internal schematic diagram of the embodiment of the present invention using the lower line function (excluding the external lead);

[0038] Fig.17 This is an internal schematic diagram of the embodiment of the present invention using the down-feed function;

[0039] Fig.18 The embodiment of the present invention adopts the stereoscopic upper line function Figure 1 ;

[0040] Fig.19 The embodiment of the present invention adopts the stereoscopic upper line function Figure 2 ;

[0041] Fig. 20 This is a schematic diagram of the internal structure of the embodiment of the present invention using the upper line function;

[0042] Fig.21 Schematic diagram of an N-level housing with an upper line-inlet function in an embodiment of the present invention;

[0043] Reference numerals: 10, N-level housing; 20, L-level housing; 30, intermediate housing; 40, operating mechanism; 401, contact bracket; 402, first moving contact; 4010, second moving contact; 403, first hinge shaft; 404, second hinge shaft; 405, operating handle; 406, trip buckle; 407, lock buckle; 4071, contact portion; 4072, hinge portion; 4073, first indicator block; 4074, second indicator block; 4075, torsion spring; 4076, offset block; 408, tension spring; 409, linkage rod; 50, indicator block observation hole; 60, first arc extinguishing system; 601, first arc extinguishing cover; 6011, first side plate; 6012, second side plate; 6013, third side plate; 602, first arc extinguishing sheet; 70, second arc extinguishing system; 701, second arc extinguishing cover; 7011, fourth side plate; 7012, fifth side plate; 7013, sixth side plate; 702, second arc extinguishing sheet; 80, gas generating hole; 90, first air outlet; 100, second air outlet; 110, leakage coil; 120, air switch coil; 130, Magnetic yoke; 140, leakage coil skeleton; 150, first moving iron core; 160, static iron core; 170, second moving iron core; 180, first fixed plate; 190, second fixed plate; 200, first notch; 210, ejector rod; 2101, front ejector rod; 2102, rear ejector rod; 220, spring; 230, test button; 240, conducting member; 2401, fixed end; 24011, fixed plate; 24012, vertical plate; 2402, contact end; 24021, first connecting section; 24022, second connecting section; 24023, contact end; 250, conductive ring; 260, mounting platform; 270, first stopper; 280, second stopper; 290, fixed block; 300, first limiting groove; 310, second limit groove; 320, circuit board; 330, double gold; 340, incoming terminal; 350, external lead hole; 360, external lead; 370, lead groove; 380, mounting piece; DETAILED DESCRIPTION

[0044] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0045] like Figure 1-21 As shown, the present invention is a leakage circuit breaker, comprising an N-level housing 10 and an L-level housing 20, wherein an intermediate housing 30 is disposed between the N-level housing 10 and the L-level housing 20, the N-level housing 10 and the intermediate housing 30 form an N-level circuit breaker part, and the L-level housing 20 and the intermediate housing 30 form an L-level circuit breaker part.

[0046] See also Figure 1-3, the N-level circuit breaker part where the N-level housing 10 is located and the L-level circuit breaker part where the L-level housing 20 is located share an operating mechanism 40, the N-level circuit breaker and the L-level circuit breaker are disconnected at the same time, and the specific structure of the operating mechanism 40 is as follows:

[0047] The operating mechanism 40 is fixed on the intermediate housing 30, and includes a moving contact bracket 401, a first moving contact 402 and a second moving contact 4010, wherein the first moving contact 402 and the second moving contact 4010 are located on both sides of the moving contact bracket 401, the first moving contact 402 is located on the side close to the N-level circuit breaker, and the second moving contact 4010 is located on the side close to the L-level circuit breaker, and a first hinge shaft 403 and a second hinge shaft 404 are formed on both sides of the lower end of the moving contact bracket 401, respectively, the first hinge shaft 403 is hingedly arranged with the first moving contact 402, and the second hinge shaft 404 is hingedly arranged with the second moving contact 4010, and the operating mechanism 40 also includes an operating handle 405, A trip buckle 406, a lock buckle 407 and a tension spring 408, a linkage rod 409 is arranged between the operating handle 405 and the trip buckle 406, the trip buckle 406 is hinged to the upper end part of the moving contact bracket 401, the lock buckle 407 is rotatably arranged in the middle position of the moving contact bracket 401, and the lock buckle 407 extends to one side of the trip buckle 406 and cooperates with the trip buckle 406 to limit the rotation of the trip buckle 406, one end of the tension spring 408 is connected to the N-level housing 10, and the other end is connected to the moving contact bracket 401, an inner hole is opened on the moving contact bracket 401, and the other end of the tension spring 408 is connected to the inner hole.

[0048] The lock buckle 407 includes a resisting portion 4071 that resists the jump buckle 406, a hinged portion 4072, a first indicator block 4073, and a second indicator block 4074, wherein the resisting portion 4071 is arranged close to the jump buckle 406, and the hinged portion 4072 is hinged to the moving contact bracket 401, wherein a torsion spring 4075 is further arranged at the hinged portion 4072, and an abutting block 4076 is arranged at one end of the torsion spring 4075, and the abutting block 4076 is located above the hinged portion 4072 and close to the resisting portion 4071, and the torsion spring 4075 and the abutting block 4076 are mutually limited, and their function is to provide a restoring force for resetting the lock buckle 407;

[0049] In addition, the first indicator block 4073 is arranged close to the first moving contact 402, and the second indicator block 4074 is arranged close to the second moving contact 4010. The first indicator block 4073 and the second indicator block 4074 are used to indicate the position of the lock 407. The corresponding N-level housing 10 and the L-level housing 20 are provided with an indicator block observation hole 50 for an outsider to observe the position of the lock 407 and judge whether the circuit breaker is in the open or closed state.

[0050] The operating mechanism 40 in the above technical solution works as follows: the rotation of the moving contact is achieved by the cooperation of the moving contact bracket 401 and the tension spring 408. The moving contact moves in the following process: when the static contact is closed, the abutment portion 4071 of the lock catch 407 abuts against the trip catch 406 to limit the rotation of the trip catch 406. When the leakage circuit breaker is actuated, the tripper push rod of the circuit breaker pushes the lock catch 407 to rotate. The rotation of the lock catch 407 unlocks the abutment between the trip catch 406 and the abutment portion 4071. At this time, the moving contact bracket 401 is in The circuit breaker is opened by rotating under the action of the tension spring 408, and the handle is also rotated to the open state; when closing the circuit, the handle is rotated, and at this time the linkage rod 409 drives the trip button 406 and the moving contact bracket 401 to rotate around the pin shaft until the moving contact contacts the static contact. At this time, the handle continues to rotate. At this time, since the moving contact and the static contact are already in contact and will not change position, the moving contact bracket 401 can only move as a whole, so that the contact between the moving contact and the static contact is closer and ensures good contact between the moving contact and the static contact.

[0051] In the present invention, a set of operating mechanisms 40 is adopted to achieve simultaneous closing and disconnection of two-stage circuit breakers, reduce accessories, and reduce the volume.

[0052] like Figure 4-8As shown, a first arc extinguishing system 60 is provided between the L-class circuit breaker, that is, between the L-class housing 20 and the intermediate housing 30, and a second arc extinguishing system 70 is provided between the N-class circuit breaker, that is, between the N-class housing 10 and the intermediate housing 30. The first arc extinguishing system 60 includes a first arc extinguishing cover 601 and a first arc extinguishing sheet 602 provided in the first arc extinguishing cover 601. The first arc extinguishing cover 601 is formed by connecting a first side plate 6011, a second side plate 6012 and a third side plate 6013. The first side plate 6011 The third side plate 6013 is arranged in parallel with the second side plate 6012, and is located at one end of the first side plate 6011 and the second side plate 6012. The third side plate 6013 is provided with a gas-generating hole 80. The first arc-extinguishing plate 602 is provided with 9-11 plates. The second arc-extinguishing system 70 includes a second arc-extinguishing cover 701 and a second arc-extinguishing plate 702 arranged in the second arc-extinguishing cover 701. The second arc-extinguishing cover 701 is formed by connecting a fourth side plate 7011, a fifth side plate 7012 and a sixth side plate 7013. The fourth side plate 7011 is arranged in parallel with the fifth side plate 7012, and the sixth side plate 7013 is located at one end of the fourth side plate 7011 and the fifth side plate 7012. The sixth side plate 7013 is provided with a gas producing hole 80, the number of the second arc extinguishing plates 702 is set to 14, a first gas outlet hole 90 is provided between the intermediate shell 30 and the L-level shell 20, and a second gas outlet hole 100 is formed between the intermediate shell 30 and the N-level shell 10, the first gas outlet hole 90 is located on the side close to the third side plate 6013, and the second gas outlet hole 100 is located on the side close to the sixth side plate 7013.

[0053] The above technical solution realizes that arc extinguishing systems are used in the N-level and L-level of the leakage circuit breaker respectively, thereby improving the breaking capacity and arc extinguishing effect; the first arc extinguishing system 60 of the L-level is larger in volume than the second arc extinguishing system 70 of the N-level, which can ensure the arc extinguishing effect while realizing the miniaturization of the overall structure.

[0054] like Fig. 9As shown, an integrated coil assembly is also provided on one side of the operating mechanism 40, and the integrated coil assembly includes a leakage coil 110 and an open coil 120, and the open coil 120 is located on one side of the leakage coil 110, and the two are coaxially arranged by a top rod 210. The leakage coil 110 is arranged on the yoke 130, and the yoke 130 is provided with a leakage coil frame 140 for fixing the leakage coil 110, and the leakage coil frame 140 is provided with a first moving iron core 150 and a static iron core 160, and the push rod 210 extends from one end of the static iron core 160 through the first moving iron core 150 to the second moving iron core 170 of the open coil 120, and the first fixing plate 180 and the second fixing plate 190 are provided at both ends of the open coil 120, the second moving iron core 170 is located inside the open coil 120, and a first notch 200 connected to the push rod 210 is opened on one side of the second moving iron core 170, and the first notch 200 and the push rod 210 are clearance-matched, and the second fixing plate 190 The push rod 210 is arranged close to one side of the yoke 130 and fixedly connected to the yoke 130, and includes a front end push rod 2101 and a rear end push rod 2102. The front end push rod 2101 passes through the first moving iron core 150 and is connected to the first slot 200 of the second moving iron core 170. The front end push rod 2101 and the first slot 200 are clearance fit. The first moving iron core 150 is penetrated by a through hole. The front end push rod 2101 and the through hole are clearance fit. The diameter of the rear end push rod 2102 is larger than the diameter of the front end push rod 2101. A spring 220 is arranged on the rear end push rod 2102.

[0055] In the above technical solution, an integrated coil structure is adopted to arrange the leakage coil 110 and the circuit breaker coil 120 side by side, and leakage protection and circuit breaker protection are achieved through the action of a top rod 210.

[0056] In addition, the present invention also includes a test device, see Figure 10-14 The test device is arranged on the N-level shell 10, including a test button 230, a conductive member 240 located below the test button 230, and a conductive ring 250. The conductive member 240 is electrically connected to the conductive ring 250 under the action of the test button 230. The conductive member 240 is fixedly arranged on a mounting platform 260 formed in the N-level shell 10. One end of the mounting platform 260 is formed with a mounting member for fixing the conductive ring 250. The pressing surface of the test button 230 is flush with the upper end surface of the N-level shell 10.

[0057] The mounting platform 260 and the mounting member 380 are integrally formed in the N-level shell 10. The mounting member 380 is a columnar structure. The conductive ring 250 is sleeved on the mounting member 380. The conductive member 240 is clamped on the mounting platform 260. The conductive member 240 includes a fixed end 2401 and a contact end 2402. The contact end 2402 is formed on one side of the fixed end 2401. The contact end 2402 is an elastic spring. The contact end 2402 extends from the fixed end 2401 to the test button 230. The conductive ring 250 is located below the contact end 2402.

[0058] The contact end 2402 includes a first connecting section 24021 connected to the fixed end 2401, a second connecting section 24022 and a contact end 24023, the contact end 24023 is an arc-shaped structure, the bending direction of the arc-shaped structure is toward one side of the guide ring, the first connecting section 24021 and the second connecting section 24022 are both inclined, and the slope of the first connecting section 24021 is greater than the slope of the second connecting section 24022, the fixed end 2401 includes a fixed plate 24011 and vertical plates 24012 perpendicular to both sides of the fixed plate 24011, a first stop block 270, a second stop block 280 and a fixed block 290 are formed on the mounting platform 260, the first stop block 270 and the second stop block 280 are located on both sides of the fixed block 290, a first limiting groove 300 is formed between the first stop block 270 and the fixed block 290, and the second stop block 280 A second limiting groove 310 is formed between the contact end 2402 and the fixing block 290 . When the contact end 2402 is installed, the vertical plate 24012 is located in the first limiting groove 300 and the second limiting groove 310 respectively, and the fixing plate 24011 is located above the fixing block 290 .

[0059] The above technical solution adopts a brand-new test device, and its structure and distribution are also different from the prior art. Most of the prior art adopts the torsion spring method, in which the external force acts on one of the torsion spring arms, and then the torsion spring rotates, and the other torsion spring arm is connected with the conductive ring 250; this causes the conductive ring 250 in the prior art to be far away from the torsion spring, and the conduction speed is slow; while the present invention realizes the vertical distribution of the test button 230, the conduction member 240 and the conductive ring 250, which can achieve fast conduction and have a good conduction effect. Secondly, the pressing surface of the test button 230 is kept flush with the upper end surface of the N-level housing of the circuit breaker, so that the height of the test button 230 is reduced, and the problem of misoperation caused by the height will not occur; the conduction member 240 different from the torsion spring is adopted, including a fixed end 2401 and a contact end 2402, which not only ensures the stability of the conduction member 240, but also ensures the conduction effect of the contact end 2402.

[0060] In addition, a circuit board 320 is also provided in the N-level shell 10. The circuit board 320 is located on the outside of the double gold 330 in the N-level shell 10 and on the inside of the input terminal 340 of the N-level shell 10. The circuit board 320 in this embodiment draws power from the output terminal for the N level and the L level also draws power from the output terminal. The effect is that when the product is powered off, the circuit board 320 will also be powered off directly, which will not cause misoperation and improve safety.

[0061] Secondly, on the basis of the present invention, in order to realize the function of lower wire entry, an external lead hole 350 is formed on the above-mentioned N-level housing 10, and an external lead 360 is arranged in the external lead hole 350. The external lead 360 is connected to the terminal board of the N-level static contact, and a lead groove 370 for arranging the external lead 360 is formed in the N-level housing 10. The lead groove 370 extends from the external lead hole 350 to the bottom of the terminal board A of the N-level static contact. The specific structure is as follows Figure 15-17 As shown; Furthermore, in order to realize the upper line function, the external lead 360 is connected to the arc-starting plate B in the N-level housing 10 and the first moving contact 402 in the N-level housing 10, and the use of one terminal is reduced in the above technical solution; Specifically as Figure 18-21 shown.

[0062] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0063] More use of such as 10, N-level housing; 20, L-level housing; 30, intermediate housing; 40, operating mechanism; 401, contact bracket; 402, first moving contact; 4010, second moving contact; 403, first hinge shaft; 404, second hinge shaft; 405, operating handle; 406, jump buckle; 407, lock buckle; 4071, contact part; 4072, hinge part; 4073, first indicator block; 4074, second indicator block; 4075, torsion spring; 4076, opposite block; 408, tension spring; 409, linkage rod; 50, indicator block observation hole; 60, first arc extinguishing system; 601, first arc extinguishing cover; 6011, first side plate; 6012, second side plate; 6013, The third side plate; 602, the first arc extinguishing plate; 70, the second arc extinguishing system; 701, the second arc extinguishing cover; 7011, The fourth side plate; 7012, the fifth side plate; 7013, the sixth side plate; 702, the second arc-extinguishing plate; 80, the gas-generating hole; 90, the first gas outlet hole; 100, the second gas outlet hole; 110, the leakage coil; 120, the air-opening coil; 130, the magnetic yoke; 140, the leakage coil skeleton; 150, the first moving iron core; 160, the static iron core; 170, the second moving iron core; 180, the first fixed plate; 190, the second fixed plate; 200, the first notch; 210, the top rod; 2101, the front end top rod; 2102, the rear end top rod; 220, the spring; 230, the test button; 240, the conducting member; 2401, the fixed end; 24011, the fixed plate; 24012, the vertical plate; 2402, the contact end; 24021, first connection section; 24022, second connection section; 24023, contact end; 250, conductive ring; 260, mounting platform; 270, first stopper; 280, second stopper; 290, fixing block; 300, first limit groove; 310, second limit groove; 320, circuit board; 330, double gold; 340, incoming terminal; 350, external lead hole; 360, external lead; 370, lead groove; 380, mounting part, etc. It should be noted that the terms "include", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the existence of other identical elements in the product or system including the elements.

[0064] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not depart from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A leakage circuit breaker, characterized in that: The invention comprises an N-level housing and an L-level housing, wherein an intermediate housing is arranged between the N-level housing and the L-level housing, an N-level circuit breaker part where the N-level housing is located and an L-level circuit breaker part where the L-level housing is located share an operating mechanism, the N-level circuit breaker and the L-level circuit breaker are disconnected at the same time, the operating mechanism is fixed on the intermediate housing, the operating mechanism comprises a moving contact bracket, a first moving contact and a second moving contact, the first moving contact and the second moving contact are located on both sides of the moving contact bracket, the first moving contact is located on a side close to the N-level circuit breaker, the second moving contact is located on a side close to the L-level circuit breaker, a first hinge shaft and a second hinge shaft are formed on both sides of the lower end of the moving contact bracket, and the first hinge shaft is connected to the first hinge shaft and the second hinge shaft. A moving contact is hingedly arranged, and the second hinge shaft is hingedly arranged with the second moving contact. The operating mechanism also includes an operating handle, a jump buckle, a lock buckle and a tension spring. A linkage rod is arranged between the operating handle and the jump buckle. The jump buckle is hinged to the upper end part of the moving contact bracket, and the lock buckle is rotatably arranged in the middle position of the moving contact bracket, and the lock buckle extends to one side of the jump buckle to cooperate with the jump buckle to limit the rotation of the jump buckle. One end of the tension spring is connected to the N-level shell, and the other end is connected to the moving contact bracket; wherein the lock buckle has a hinged part, and a torsion spring is also arranged at the hinged part, and an abutment block is arranged at one end of the torsion spring, and the abutment block is located above the hinged part and close to the abutment part, and the torsion spring and the abutment block limit each other.

2. A leakage circuit breaker according to claim 1, characterized in that: The lock includes a resistance part that resists the jumper, a hinged part, and a first indicator block and a second indicator block. The resistance part is arranged close to the jumper, and the hinged part is hinged to the moving contact bracket. The first indicator block is arranged close to the first moving contact, and the second indicator block is arranged close to the second moving contact. The first indicator block and the second indicator block are used to indicate the lock position, and the corresponding N-level shell and L-level shell are provided with indicator block observation holes.

3. A leakage circuit breaker according to claim 2, characterized in that: A first arc extinguishing system is arranged between the L-level shell and the intermediate shell, and a second arc extinguishing system is arranged between the N-level shell and the intermediate shell. The first arc extinguishing system includes a first arc extinguishing cover and a first arc extinguishing sheet arranged in the first arc extinguishing cover. The first arc extinguishing cover is formed by connecting a first side plate, a second side plate and a third side plate. The first side plate and the second side plate are arranged in parallel. The third side plate is located at one end of the first side plate and the second side plate. The third side plate is provided with gas production holes. The first arc extinguishing sheet is provided with 9-11 pieces.

4. A leakage circuit breaker according to claim 3, characterized in that: The second arc extinguishing system includes a second arc extinguishing hood and a second arc extinguishing sheet arranged in the second arc extinguishing hood. The second arc extinguishing hood is formed by connecting a fourth side plate, a fifth side plate and a sixth side plate. The fourth side plate is arranged parallel to the fifth side plate, and the sixth side plate is located at one end of the fourth side plate and the fifth side plate. The sixth side plate is provided with gas producing holes, and the number of the second arc extinguishing sheets is set to 14.

5. A residual current circuit breaker according to claim 4, characterized in that: A first air outlet is provided between the intermediate shell and the L-level shell, a second air outlet is formed between the intermediate shell and the N-level shell, the first air outlet is located on a side close to the third side plate, and the second air outlet is located on a side close to the sixth side plate.

6. A residual current circuit breaker according to claim 1 or 5, characterized in that: An integrated coil assembly is also provided on one side of the operating mechanism, and the integrated coil assembly includes a leakage coil and an air-open coil, the air-open coil is located on one side of the leakage coil, and the two are coaxially arranged by a push rod, the leakage coil is arranged on a magnetic yoke, and a leakage coil frame for fixing the leakage coil is provided on the magnetic yoke, a first moving iron core and a static iron core are provided in the leakage coil frame, the push rod extends from one end of the static iron core through the first moving iron core to the second moving iron core of the air-open coil, a first fixing plate and a second fixing plate are provided at both ends of the air-open coil, the second moving iron core is located inside the air-open coil, and a first slot connected to the push rod is provided on one side of the second moving iron core, the first slot is clearance-matched with the push rod, and the second fixing plate is arranged close to one side of the magnetic yoke and fixedly connected to the magnetic yoke.

7. A leakage circuit breaker with an integrated coil according to claim 6, characterized in that: The push rod includes a front end push rod and a rear end push rod. The front end push rod passes through the first moving iron core and is connected to the first slot of the second moving iron core. The front end push rod and the first slot are clearance-matched. The first moving iron core is penetrated by a through hole. The front end push rod and the through hole are clearance-matched. The diameter of the rear end push rod is larger than that of the front end push rod. A spring is arranged on the rear end push rod.

8. A residual current circuit breaker according to claim 7, characterized in that: It also includes a test device, which is arranged on the N-level shell, including a test button, a conductive piece located below the test button, and a conductive ring. The conductive piece is electrically connected to the conductive ring under the action of the test button, and the conductive piece is fixedly arranged on a mounting platform formed in the N-level shell. A mounting piece for fixing the conductive ring is formed at one end of the mounting platform, and the pressing surface of the test button is flush with the upper end surface of the N-level shell.

9. A residual current circuit breaker according to claim 8, characterized in that: The mounting platform and the mounting piece are integrally formed in an N-level shell, the mounting piece is a columnar structure, the conductive ring is sleeved on the mounting piece, the conductive piece is clamped on the mounting platform, the conductive piece includes a fixed end and a contact end, the contact end is formed on one side of the fixed end, the contact end is an elastic spring, the contact end extends from the fixed end side to the test button side, and the conductive ring is located below the contact end.

10. A residual current circuit breaker according to claim 9, characterized in that: The contact end includes a first connecting section, a second connecting section and a contact end connected to the fixed end, the contact end is an arc-shaped structure, the bending direction of the arc-shaped structure is toward one side of the guide ring, the first connecting section and the second connecting section are both inclined, and the slope of the first connecting section is greater than the slope of the second connecting section, the fixed end includes a fixed plate and a vertical plate perpendicular to both sides of the fixed plate, a first stop block, a second stop block and a fixed block are formed on the mounting platform, the first stop block and the second stop block are located on both sides of the fixed block, a first limiting groove is formed between the first stop block and the fixed block, and a second limiting groove is formed between the second stop block and the fixed block, when the contact end is installed, the vertical plate is respectively located in the first limiting groove and the second limiting groove, and the fixed plate is located above the fixed block.

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