A leakage circuit breaker

Abstract

The present invention relates to a circuit breaker, in particular to a leakage circuit breaker. The present invention adopts the following technical scheme: a leakage circuit breaker, comprising a base, a middle base, and an upper cover, wherein the middle base is located between the base and the upper cover, a first space is between the middle base and the base, a second space is between the middle base and the upper cover, an N-pole contact device and a leakage tripping mechanism are arranged in the first space, an L-pole contact device, an arc extinguishing chamber, and a double-metal pull rod mechanism are arranged in the second space, a moving contact seat action mechanism and a voltage tripping device are arranged above the middle base, and by adopting the above scheme, the present invention overcomes the problems existing in the prior art and provides a new type of leakage circuit breaker with reasonable structure and stable operation.

Description

Technical Field

[0001] The invention relates to a circuit breaker, in particular to a leakage circuit breaker. Background Art

[0002] The locking mechanism of existing circuit breaker products is generally provided with a lever, a lock and a trip button, which has a complex structure and high cost. The size of the trip button is not conducive to automated assembly, and the product has many parts, which poses a risk of product failure. Summary of the invention

[0003] The present invention overcomes the problems existing in the prior art and provides a new type of leakage circuit breaker with reasonable structure and stable operation.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a leakage circuit breaker, comprising a base, a middle base, and an upper cover, wherein the middle base is located between the base and the upper cover, a first space is formed between the middle base and the base, and a second space is formed between the middle base and the upper cover, wherein an N-pole contact device and a leakage tripping mechanism are arranged in the first space, an L-pole contact device, an arc extinguishing chamber, and a double-metal pull rod mechanism are arranged in the second space, and a moving contact seat action mechanism and a current tripping device are arranged above the middle base, characterized in that: the moving contact seat action mechanism comprises a moving contact seat, a lock, a lock push rod mechanism, a connecting rod and a handle, wherein the first end of the connecting rod is movably arranged on the handle, and the second end is arranged on the moving contact seat, the L-pole moving contact of the L-pole contact device and the N-pole moving contact of the N-pole contact device are both arranged on the moving contact seat, a convex column is arranged on the moving contact seat, and the lock is sleeved on the convex column through a through hole arranged thereon, the lock push rod mechanism includes a spring and a push rod, the elastic force of the spring acts on the push rod, and the top end of the push rod abuts against the lock, and a slide groove is arranged above the moving contact seat, the slide groove includes a curved portion and a straight portion, and the curved portion of the slide groove is bent upward at an end close to the handle The curved portion and the straight portion are connected, a resisting arm is provided at the upper end of the lock catch, and a resisting surface is provided on the resisting arm. After the circuit breaker is disconnected, the top end of the push rod resists against the side surface of the lock catch, so that the resisting surface of the lock catch is close to the curved portion of the slide groove so as to lock the second end of the connecting rod in the curved portion of the slide groove. After the second end of the connecting rod is locked in the curved portion of the slide groove, the handle can be pushed to close the circuit breaker; after the circuit breaker is closed, the leakage tripping mechanism or the current tripping device of the circuit breaker acts on the lock catch to rotate the lock catch, and the resisting surface loses the lock on the second end of the connecting rod. At this time, the second end of the connecting rod can slide into the straight portion of the slide groove to realize circuit breaking. The device is opened; the leakage tripping mechanism includes a voltage release and a linkage unit, wherein the linkage unit includes a push rod and a pull rod, the push rod is hinged on the base or the middle seat, and the two ends of the push rod respectively form a pull rod pushing end and a top rod contact end, the pull rod is slidably arranged on the base or the middle seat, the top rod contact end is arranged corresponding to the top rod position of the voltage releaser, and a lock contact surface is provided on the pull rod, the pull rod pushing end can push the pull rod to slide, and the lock contact surface cooperates with the lock to pull the lock to rotate to realize the circuit breaker opening, and a reset spring for resetting the push rod is also arranged between the top rod contact end and the middle seat or the base.

[0005] By adopting the above scheme, a new method is used to lock or unlock the second end of the connecting rod to achieve the action of closing or disconnecting the circuit breaker. The above method is easy to install, stable in action, and will not cause malfunction; the bending portion is arranged to bend upward, so that the handle in the closing position and the tripping position are opposite to those of the traditional circuit breaker, meeting the needs of different customers. The traditional circuit breaker cannot achieve reverse operation. In addition, the above leakage tripping mechanism has a simple structure and a small size, and can be well arranged in the second space of the leakage circuit breaker.

[0006] A further configuration of the present invention is that a pressure limit surface is provided on the upper side of the bending portion, and after the circuit breaker is closed, the second end of the connecting rod is abutted against the pressure limit surface. At this time, the angle between the thrust direction generated by the handle on the second end of the connecting rod and the thrust direction generated by the pressure limit surface on the second end of the connecting rod is less than 180 degrees, the contact surface on the contact arm is L-shaped, and an inclined surface is provided below the contact surface to facilitate the second end of the connecting rod to slide into the bending portion, and a groove is provided around the bottom of the slide groove.

[0007] By adopting the above solution, it is ensured that the second end of the connecting rod can move toward the straight part of the sliding groove under the action of external force, so that the circuit breaker can be normally tripped.

[0008] A further configuration of the present invention is that it also includes a power-taking mechanism for a test device, which includes a block arranged on a base, a slide groove formed between the blocks, a push rod arranged in the slide groove, the push rod is placed between the handle and the yoke of the voltage release, a pin shaft is arranged on the base, a torsion spring is sleeved on the pin shaft, a first extension arm of the torsion spring is abutted against a first end of the push rod, a second end of the push rod is arranged corresponding to a moving contact seat, the rotation of the moving contact seat can drive the push rod to move, a notch is arranged on the upper side of the yoke of the voltage release, the first extension arm of the torsion spring is located at the notch, after the circuit breaker is opened, the moving contact seat pushes the push rod to move and compresses the torsion spring so that the first extension arm of the torsion spring is separated from the yoke, after the circuit breaker is closed, the moving contact seat releases the push rod, and the push rod moves under the elastic force of the torsion spring so that the first extension arm of the torsion spring contacts the inner wall at the notch of the yoke to achieve electrical connection.

[0009] By adopting the above scheme, the power of the torsion spring is obtained from the yoke of the release, and the push rod cooperates with the moving contact seat to achieve movement. The push rod pushes the first extension arm of the torsion spring to move in the notch of the yoke to achieve contact or separation with the yoke. The above method of taking power can separate the first extension arm from the yoke after the moving contact is disconnected, and there will be no contact. In this way, there will be no electricity when the test button is pressed, thereby protecting the circuit breaker. No matter how the circuit breaker is connected, the circuit board will always have no electricity after the circuit breaker is disconnected, thereby increasing the life of the circuit board.

[0010] A further configuration of the present invention is that: a protrusion is provided on the periphery of the sliding groove of the movable contact seat, and an arc surface is provided on the curved portion of the protrusion, and the arc surface is connected with the pressing and limiting surface to form the pressing and limiting surface of the second end of the connecting rod.

[0011] By adopting the above solution, the area of ​​the pressing limit surface is increased, so that the pressing effect is better.

[0012] A further configuration of the present invention is that: the voltage release includes a coil, a coil frame, a yoke, and an iron core. The yoke is arranged in a "U" shape, a push rod is arranged at one end of the iron core, and the iron core is arranged in a flat plate shape. The coil frame includes a front end plate and a rear end plate arranged opposite to each other, and a hollow main frame body is connected between the front end plate and the rear end plate. The main frame body is flat, the iron core is inserted into the main frame body, and the coil is wound on the main frame body. An opening for the push rod to enter and exit is provided on the front end plate, the bottom edge of the yoke is in contact with the front end surface of the front end plate, and the opposite two side edges of the yoke extend toward the rear end plate and are connected to the two sides of the rear end plate. A through hole for the iron core to enter and exit is provided at the corresponding opening position on the bottom edge of the yoke; the bottom A guide groove is provided on the seat along the sliding direction of the pull rod, a guide rib is provided on the pull rod facing the base side, the guide rib is slidably arranged in the guide groove, a hinge shaft is provided on the base, a hinge hole is provided on the push rod, the hinge shaft is passed through the hinge hole, a linkage groove is provided on the surface of the pull rod facing the base side, the pull rod toggle end extends into the linkage groove, both end surfaces of the linkage groove facing the pull rod toggle end are arc surfaces, one end of the pull rod extends limited protrusions toward the base and the middle seat respectively, a positioning boss is provided at the contact end of the push rod, a positioning plate is provided on the base, and a convex rib is provided on the positioning plate to form a positioning groove, one end of the return spring is sleeved on the positioning boss and contacts with the contact end of the push rod, and the other end contacts in the positioning groove.

[0013] By adopting the above technical solution, the iron core is set to a flat plate shape and the main frame is set to a flat shape, so that the volume of the entire coil skeleton is reduced; furthermore, the connection method of the front end plate, the rear end plate and the yoke makes the overall installation more convenient, and the yoke is surrounded and set on the coil, which is conducive to the enhancement and improvement of the iron core suction force and the stability of the product. In addition, other settings make the tripping effect very good, the work is stable, and no malfunction occurs.

[0014] The present invention is further configured as follows: an L-pole moving contact is mounted on a convex column on one side of a lock catch mounted on the moving contact seat, and the side of the moving contact seat on which the L-pole moving contact is mounted is the first side, a second convex column is coaxially arranged with the convex column on the other side of the moving contact seat, an N-pole moving contact is mounted on the second convex column, and the side of the moving contact seat is the second side, a positioning block is arranged below the convex block on the first side of the moving contact seat, an arc-shaped convex column is arranged around the bottom of the convex column on the first side of the moving contact seat, and a convex rib is arranged on the plane around the convex column on the first side of the moving contact seat, The lock buckle is provided with a mounting through hole, the mounting through hole of the lock buckle is sleeved on the first side convex column and forms a rotational fit with the arc-shaped convex column, the L-pole moving contact is sleeved on the convex column on the first side and its side surface abuts or is close to the end of the arc-shaped convex column, the L-pole moving contact is provided with a first bayonet, and a concave cavity is provided on the moving contact seat at a position corresponding to the first bayonet, a stopper is provided on the lower side of the convex block, and a limiting groove is formed between the stopper and the side surface of the first side of the moving contact seat, a first torsion spring is provided between the L-pole moving contact and the moving contact seat, and the first torsion spring is also sleeved on the convex column on the first side, The first torsion arm of the first torsion spring abuts in the limiting groove, the second torsion arm of the first torsion spring abuts on the first bayonet of the L-pole moving contact, the end wall of the second torsion arm of the first torsion spring has a bent portion, the bent portion is inserted into the concave cavity below the first bayonet, a positioning piece is arranged on the L-pole moving contact, the positioning piece is located between the positioning block and the protrusion of the moving contact seat, the abutment between the positioning piece and the positioning block or the protrusion constitutes the limitation of the rotation angle of the L-pole moving contact, a connecting column is arranged above the second protrusion on the second side of the moving contact seat, a convex edge is arranged around the periphery of the connecting column, and the convex edge A contact surface and a contact boss are respectively provided on the upper and lower parts, a third torsion spring is sleeved on the connecting column, the first torsion arm of the third torsion spring is in contact with the contact surface, and the second torsion arm of the third torsion spring can be in contact with the contact boss, a second stopper is provided below the contact boss, a positioning recess is formed between the second stopper and the side surface of the second side of the moving contact seat, a second bayonet is provided on the N-pole moving contact, a second concave cavity is provided on the second side of the moving contact seat and corresponding to the second bayonet, the N-pole moving contact is sleeved on the second convex column on the second side of the moving contact seat, and the N-pole moving contact is in contact with the moving contact A second torsion spring is arranged between the head seats, and the second torsion spring is also sleeved on the second convex column on the second side of the moving contact seat, the first torsion arm of the second torsion spring abuts on the positioning recess, the second torsion arm of the second torsion spring abuts on the second bayonet of the N-pole moving contact, and the end of the second torsion arm of the second torsion spring is bent and inserted into the second concave cavity, a positioning protrusion is arranged on the second side of the moving contact seat, and an N limit position piece is arranged on the N-pole moving contact and between the positioning protrusion and the abutment protrusion, and the abutment between the N limit position piece and the positioning protrusion or the abutment protrusion constitutes a rotation angle limit of the N-pole moving contact.

[0015] By adopting the above scheme, the lock and the arc-shaped convex column rotate together, and a gap will appear, and dust will enter the gap. There will be no problem of adhesion and jamming due to increased friction caused by dust. The setting of the convex rib is to reduce friction. The L-pole moving contact is very convenient to install in the above manner. In addition, the two arms of the first torsion spring are very firmly fixed on the mounting base, and can well limit the rotation range of the L-pole moving contact. At the same time, the L-pole moving contact is closer to the static contact when closing the circuit, and will rotate first under high current conditions, which is conducive to rapid opening of the circuit.

[0016] A further arrangement of the present invention is that: through holes that penetrate each other are arranged on the boss of the moving contact seat and the second boss, the base is provided with a first boss, a first shaft is arranged integrally with the first boss, a first annular groove is arranged around the connecting portion between the first shaft and the first boss, the second boss is sleeved in the first shaft and the end of the second boss is abutted in the first annular groove, the upper cover is provided with a second boss, a second shaft is arranged integrally with the second boss, a second annular groove is arranged around the connecting portion between the second shaft and the second boss, the boss is sleeved in the second shaft and the end of the boss is abutted in the second annular groove, the width of the cross-section of the first annular groove is greater than the wall thickness of the second boss, the width of the cross-section of the second annular groove is greater than the wall thickness of the boss, the length of the first shaft is greater than the length of the second shaft, and the first shaft abuts against the second shaft after the moving contact seat is installed on the base and the upper cover, and the abutting position is located in the boss.

[0017] By adopting the above solution, the moving contact seat can be easily installed on the base and the upper cover. The above installation method has multiple insurance functions. No matter whether the boss or the shaft is broken, it will not affect the work and the product can continue to be used. In addition, the installation is also very convenient.

[0018] The present invention will be further described below in conjunction with specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view showing a first space and a second space according to an embodiment of the present invention;

[0021] Figure 3 It is a three-dimensional diagram in the first space of an embodiment of the present invention;

[0022] Figure 4 It is a three-dimensional diagram of the second space in an embodiment of the present invention;

[0023] Figure 5 This is a three-dimensional diagram showing the installation of the moving contact seat, the L-pole moving contact and the lock catch according to an embodiment of the present invention;

[0024] Figure 6This is a three-dimensional diagram showing the installation of a moving contact seat and an L-pole moving contact according to an embodiment of the present invention;

[0025] Figure 7 This is a three-dimensional diagram showing the installation of a moving contact seat and an N-pole moving contact according to an embodiment of the present invention;

[0026] Figure 8 It is a three-dimensional diagram of a moving contact seat according to an embodiment of the present invention;

[0027] Fig. 9 This is a three-dimensional diagram showing the installation of the moving contact seat and the lock catch according to an embodiment of the present invention;

[0028] Fig.10 This is a three-dimensional diagram showing the installation between the moving contact seat, the handle and the connecting rod according to an embodiment of the present invention;

[0029] Fig.11 for Fig.10 Force analysis diagram of

[0030] Fig.12 This is a three-dimensional diagram of an arc-shaped convex column of a moving contact seat according to an embodiment of the present invention;

[0031] Fig.13 This is a structural diagram of a lock push rod mechanism according to an embodiment of the present invention;

[0032] Fig.14 This is a structural diagram of a linkage unit according to an embodiment of the present invention;

[0033] Fig.15 This is a diagram showing the coordination of individual components of a linkage unit according to an embodiment of the present invention;

[0034] Fig.16 It is a structural diagram of a seat in an embodiment of the present invention;

[0035] Fig.17 It is a structural diagram of a base according to an embodiment of the present invention;

[0036] Fig.18 This is a structural diagram of a power supply mechanism according to an embodiment of the present invention;

[0037] Fig.19 is a three-dimensional diagram of a push rod according to an embodiment of the present invention;

[0038] Fig. 20 This is a structural diagram reflecting the cooperation between the push rod and the moving contact seat in an embodiment of the present invention;

[0039] Fig.21 This is a schematic diagram of an embodiment of the present invention reflecting the push rod in the first space;

[0040] Fig. 22 This is a schematic diagram of an embodiment of the present invention reflecting the push rod in the second space;

[0041] Fig.23 It is a three-dimensional diagram of a magnetic yoke of a current release according to an embodiment of the present invention;

[0042] Fig.24 It is a three-dimensional diagram of a voltage release according to an embodiment of the present invention;

[0043] Fig.25 is a cross-sectional view of a voltage release according to an embodiment of the present invention;

[0044] Fig.26 It is a three-dimensional diagram of a magnetic yoke of a voltage release according to an embodiment of the present invention;

[0045] Fig. 27 A three-dimensional diagram of a coil skeleton of a voltage release according to an embodiment of the present invention;

[0046] Fig.28 A cross-sectional view of a boss and a second boss according to an embodiment of the present invention;

[0047] Fig.29 It is a structural diagram reflecting the first axis on the base of an embodiment of the present invention;

[0048] Fig.30 The structure diagram of the embodiment of the present invention is covered with a second axis. DETAILED DESCRIPTION

[0049] like Figure 1-Figure 30As shown, a leakage circuit breaker includes a base 1, a middle base 2, and an upper cover 3. The middle base 2 is located between the base 1 and the upper cover 3. A first space 11 is formed between the middle base 2 and the base 1, and a second space 12 is formed between the middle base 2 and the upper cover 3. An N-pole contact device and a leakage tripping mechanism A are arranged in the first space 11. An L-pole contact device, an arc extinguishing chamber C, and a double-metal pull rod mechanism D are arranged in the second space 12. A moving contact seat action mechanism E and a current tripping device F are arranged above the middle base 2. The moving contact seat action mechanism E includes a moving contact seat E1, a lock E2, a lock push rod mechanism E6, a connecting rod E7, and a handle E8. The first end of the connecting rod E7 is movably arranged on the handle E8, and the second end is arranged on the moving contact seat E1. The L-pole moving contact E3 of the pole contact device and the N-pole moving contact E4 of the N-pole contact device are both arranged on the moving contact seat E1, and a boss E14 is arranged on the moving contact seat E1. The lock E2 is sleeved on the boss E14 through a through hole E21 arranged thereon. The lock push rod mechanism E6 includes a spring E61 and a push rod E62. The elastic force of the spring E61 acts on the push rod E62, and the top of the push rod E62 abuts against the lock E2. A slide groove E111 is arranged above the moving contact seat E1, and the slide groove E111 includes a curved portion E1111 and a straight portion E1112. The curved portion E1111 of the slide groove E111 is bent upward at one end close to the handle E8, and the curved portion E1111 and the straight portion E1112 guide According to the configuration, a resistance arm E22 is provided at the upper end of the lock catch E2, and a resistance surface E23 is provided on the resistance arm E22. After the circuit breaker is disconnected, the top end of the push rod E62 is resisted against the side surface of the lock catch E2, so that the resistance surface E23 of the lock catch E2 is close to the curved portion E1111 of the slide groove so as to lock the second end of the connecting rod E7 in the curved portion E1111 of the slide groove. After the second end of the connecting rod E7 is locked in the curved portion E1111 of the slide groove, the handle can be pushed to close the circuit breaker; after the circuit breaker is closed, the leakage tripping mechanism A or the current tripping device F of the circuit breaker acts on the lock catch E2 to rotate the lock catch E2, and then the resistance surface E23 loses the lock on the second end of the connecting rod E7. At this time, the second end of the connecting rod E7 can slide into the straight portion E1112 of the slide groove to realize the circuit breaker opening. The leakage tripping mechanism A includes a voltage release A1 and a linkage unit A2, wherein the linkage unit A2 includes a lever A21 and a pull rod A22, the lever A21 is hinged on the base 1 or the middle seat 2, and the two ends of the lever A21 form a pull rod toggle end and a top rod contact end respectively, the lever A22 is slidably arranged on the base 1 or the middle seat 2, and the top rod contact end is arranged at a position corresponding to the top rod A15 of the current release A1, and a lock contact surface A221 is provided on the lever A22, the lever toggle end can toggle the lever A22 to slide, and the lock contact surface A221 cooperates with the lock E2 to pull the lock E2 to rotate to realize the circuit breaker opening, and a reset spring A4 for resetting the lever A21 is also arranged between the top rod contact end and the middle seat 2 or the base 1;By adopting the above scheme, a new method is adopted to lock or unlock the second end of the connecting rod E7 to realize the action of closing or disconnecting the circuit breaker. The above method is easy to install, stable in action, and will not cause malfunction; the bending portion E1111 is set to bend upward, so that the handle E8 is opposite to the traditional circuit breaker in the closing position and the tripping position, meeting the needs of different customers. The traditional circuit breaker cannot achieve reverse. In addition, the above leakage tripping mechanism has a simple structure and a small volume, and can be well set in the second space of the leakage circuit breaker. ;

[0050] In the embodiment of the present invention, a pressing limit surface E1123 is provided on the upper side of the curved portion E1111, and the second end of the connecting rod E7 contacts the pressing limit surface E1123 after the circuit breaker is closed. At this time, the angle K between the thrust direction generated by the handle E8 on the second end of the connecting rod E7 and the thrust direction generated by the pressing limit surface E1123 on the second end of the connecting rod E7 is less than 180 degrees, and the contact surface E23 on the contact arm E22 is L-shaped, and an inclined surface E24 is provided below the contact surface E23 to facilitate the second end of the connecting rod E7 to slide into the curved portion, and a groove E1113 is provided around the bottom of the slide slot E111. The above scheme ensures that the second end of the connecting rod E7 can move toward the straight portion E1112 of the slide slot under the action of an external force, so that the circuit breaker can be normally tripped.

[0051] In the embodiment of the present invention, the test device also includes a power-taking mechanism G, which includes a block arranged on the base 1, a slide groove G3 is formed between the blocks, a push rod G4 is arranged in the slide groove G3, and the push rod G4 is placed between the handle E8 and the yoke F1 of the voltage release F. A pin shaft G11 is arranged on the base 1, and a torsion spring G5 is sleeved on the pin shaft G11. The first extension arm G51 of the torsion spring G5 is arranged to abut against the first end G41 of the push rod G4, and the second end G42 of the push rod G4 is arranged corresponding to the moving contact seat E1 of the circuit breaker. The rotation of the moving contact seat E1 can drive the push rod G4 to move. A notch F11 is provided on the upper side of the yoke F1. The first extension arm G51 of the torsion spring G5 is located at the notch F11. After the circuit breaker is opened, the moving contact seat E1 pushes the push rod G4 to move and compress the torsion spring G5 so that the first extension arm G51 of the torsion spring G5 is separated from the yoke F1. After the circuit breaker is closed, the moving contact seat E1 releases the push rod G4. The push rod G4 moves under the elastic force of the torsion spring G5 so that the first extension arm G51 of the torsion spring G5 contacts the inner wall of the notch F11 of the yoke F1. By adopting the above scheme, the power of the torsion spring G5 is obtained from the yoke F1 of the releaser. In addition, the push rod G4 cooperates with the moving contact seat E1 to achieve movement. The push rod G4 pushes the first extension arm G51 of the torsion spring G5 to move in the notch F11 of the yoke F1 to achieve contact or separation with the yoke F1. The above method of taking power can separate the first extension arm G51 from the yoke F1 after the moving contact is disconnected, and there will be no contact. In this way, there will be no electricity when the test button is pressed, thereby protecting the circuit breaker. No matter how the circuit breaker is connected, the circuit board will always have no electricity after the circuit breaker is disconnected, thereby increasing the life of the circuit board.

[0052] In the embodiment of the present invention, the movable contact seat E1 is provided with a protrusion E112 at the periphery of the slide slot E111, and the protrusion E112 is provided with an arc surface at the curved portion E1111, and the arc surface is connected with the pressing limit surface E1123 to form the pressing limit surface E1123 of the second end of the connecting rod E7. By adopting the above solution, the area of ​​the pressing limit surface E1123 is increased, so that the pressing effect is better.

[0053] In the embodiment of the present invention, the voltage release A1 includes a coil A11, a coil frame A12, a yoke A13, and an iron core A14. The yoke A13 is arranged in a "U" shape, and a top rod A15 is arranged at one end of the iron core A14. The iron core A14 is arranged in a flat plate shape. The coil frame A12 includes a front end plate A121 and a rear end plate A122 arranged opposite to each other. A hollow main frame body A1 is connected between the front end plate A121 and the rear end plate A122. 23, the main frame A123 is flat, the iron core A14 is inserted into the main frame A123, the coil A11 is wound on the main frame A123, the front end plate A121 is provided with an opening for the push rod A15 to enter and exit, the bottom edge of the yoke A13 is in contact with the front end surface of the front end plate A121, the opposite sides of the yoke A13 extend toward the rear end plate and are connected to the two sides of the rear end plate, and the corresponding opening position on the bottom edge of the yoke A13 is provided with a hole for the iron core A14 An entry and exit through hole A31; a guide groove A16 is provided on the base 1 along the sliding direction of the pull rod A22, a guide rib A32 is provided on the pull rod A22 facing the side of the base 1, and the guide rib A32 is slidably arranged in the guide groove A16, a hinge shaft is provided on the base 1, a hinge hole is provided on the push rod A21, and the hinge shaft is passed through the hinge hole, a linkage groove A222 is provided on the surface of the pull rod A22 facing the base 1, the pull rod toggle end extends into the linkage groove A222, and both end surfaces of the linkage groove A222 facing the pull rod toggle end are arc surfaces, one end of the pull rod A22 extends a limiting protrusion A223 toward the base 1 and the middle seat 2 respectively, a positioning boss is provided at the contact end of the push rod, a positioning sheet A101 is provided on the base 1, and a convex rib is provided on the positioning sheet A101 to form a positioning groove A1011, one end of the return spring A4 is sleeved on the positioning boss and contacts with the contact end of the push rod, and the other end contacts in the positioning groove A1011. By adopting the above technical solution, the core A14 is set to be flat and the main frame A123 is set to be flat, so that the volume of the entire coil frame A12 is reduced, which is beneficial to the stability of the product. In addition, other settings make the tripping effect very good, the work is stable, and no malfunction occurs.

[0054] In the embodiment of the present invention, the L-pole moving contact E3 is installed on the boss E4 on one side of the lock catch E2 installed on the moving contact seat E1, and the side of the moving contact seat E1 on which the L-pole moving contact E3 is installed is the first side E11, and the other side of the moving contact seat E1 is provided with a second boss E15 coaxially with the boss E14, and the N-pole moving contact E4 is installed on the second boss E15, and this side of the moving contact seat E1 is the second side E12, and a positioning block E113 is provided below the boss E112 of the first side E11 of the moving contact seat E1, and an arc-shaped boss E114 is provided around the bottom of the boss E14 of the first side E11 of the moving contact seat E1, and a convex rib E115 is provided on the plane around the boss E14 of the first side E11 of the moving contact seat E1, The lock catch E2 is provided with a mounting through hole E21, and the mounting through hole E21 of the lock catch E2 is sleeved on the convex column E14 of the first side E11 and forms a rotational fit with the arc-shaped convex column E114. The L-pole moving contact E3 is sleeved on the convex column E14 of the first side E11 and its side surface contacts or is close to the end of the arc-shaped convex column E114. The L-pole moving contact E3 is provided with a first bayonet E31, and a concave cavity E15 is provided on the moving contact seat E1 and at a position corresponding to the first bayonet E31. A stopper E113 is provided on the lower side of the convex block E112, and the stopper E1121 is in contact with the moving contact seat. A limiting groove E1122 is formed between the side surfaces of the first side E11 of E1, a first torsion spring E5 is arranged between the L-pole moving contact E3 and the moving contact seat E1, and the first torsion spring E5 is also sleeved on the convex column E14 of the first side E11, the first torsion arm of the first torsion spring E5 abuts in the limiting groove E1122, the second torsion arm of the first torsion spring E5 abuts on the first bayonet E31 of the L-pole moving contact E3, the end wall of the second torsion arm of the first torsion spring E5 has a bent portion, the bent portion is inserted into the concave cavity E15 below the first bayonet E31, and a positioning piece E1122 is arranged on the L-pole moving contact E3. 32, the positioning piece E32 is located between the positioning block E113 and the boss E112 of the moving contact seat E1, and the contact between the positioning piece E32 and the positioning block E113 or the boss E112 constitutes the limit of the rotation angle of the L-pole moving contact E3. A connecting column E121 is arranged above the second boss E15 of the second side E12 of the moving contact seat E1, and a convex edge E1211 is arranged around the periphery of the connecting column E121, and a contact surface E12111 and a contact boss E12112 are respectively arranged on the convex edge E1211, and a third torsion spring is sleeved on the connecting column E121 E6, the first torsion arm of the third torsion spring E6 abuts against the abutment surface E12111, the second torsion arm of the third torsion spring E6 can abut against the abutment boss E12112, a second stopper E121121 is provided below the abutment boss E12112, a positioning notch E121122 is formed between the second stopper E121121 and the side surface of the second side E12 of the moving contact seat E1, a second bayonet E42 is provided on the N-pole moving contact E4, a second concave cavity E123 is provided on the second side E12 of the moving contact seat E1 and corresponding to the second bayonet E42,The N-pole moving contact E4 is sleeved on the second convex column E15 of the second side E12 of the moving contact seat E1, and a second torsion spring E7 is arranged between the N-pole moving contact E4 and the moving contact seat E1. The second torsion spring E7 is also sleeved on the second convex column E15 of the second side E12 of the moving contact seat E1. The first torsion arm of the second torsion spring E7 abuts against the positioning notch E121122, and the second torsion arm of the second torsion spring E7 abuts against the second bayonet E42 of the N-pole moving contact E4. , and the second torsion arm end of the second torsion spring E7 is bent and inserted into the second concave cavity E123, a positioning convex block E122 is provided on the second side E12 of the moving contact seat E1, and an N limit piece E41 is provided on the N-pole moving contact E4 and between the positioning convex block E122 and the abutting boss E12112. The abutment between the N limit piece E41 and the positioning convex block E122 or the abutting boss E12112 constitutes the limit of the rotation angle of the N-pole moving contact E4. ,

[0055] In the embodiment of the present invention, the movable contact seat E1 boss E14 and the second boss E15 are provided with through holes that penetrate each other, the base 1 is provided with a first boss H11, and the first boss H11 is provided with a first shaft H12 integrally therewith, and a first annular groove H13 is provided around the connecting portion between the first shaft H12 and the first boss H1, and the second boss E15 is sleeved on the first shaft H12, and the end of the second boss E15 abuts against the first annular groove H13, and the upper cover 3 is provided with a second boss H31, and the second boss H31 is provided with a second shaft H32 integrally therewith. The second shaft H32 and the second boss H31 are connected at the periphery thereof with a second annular groove H33. After the boss E14 is sleeved on the second shaft H32, the end of the boss E14 abuts against the second annular groove H33. The width of the cross section of the first annular groove H13 is greater than the wall thickness of the second boss E15. The width of the cross section of the second annular groove H33 is greater than the wall thickness of the boss E14. The length of the first shaft H12 is greater than the length of the second shaft H32. After the moving contact seat E1 is installed on the base 1 and the upper cover 3, the first shaft H12 abuts against the second shaft H32, and the abutting position is located in the boss E14. By adopting the above scheme, the moving contact seat E'1 can be conveniently installed on the base 1 and the upper cover 3. The above installation method has multiple insurance functions. Whether the boss or the shaft is broken, it will not affect the work, and the product can continue to be used. In addition, the installation is also very convenient.

Claims

1. A leakage circuit breaker, comprising a base, a middle base, and an upper cover, wherein the middle base is located between the base and the upper cover, a first space is between the middle base and the base, a second space is between the middle base and the upper cover, an N-pole contact device and a leakage tripping mechanism are arranged in the first space, an L-pole contact device, an arc extinguishing chamber, and a double-metal pull rod mechanism are arranged in the second space, a moving contact seat action mechanism and a current tripping device are arranged above the middle base, and the characteristics are: The moving contact seat action mechanism comprises a moving contact seat, a lock, a lock push rod mechanism, a connecting rod and a handle, wherein the first end of the connecting rod is movably arranged on the handle, and the second end is arranged on the moving contact seat, the L-pole moving contact of the L-pole contact device and the N-pole moving contact of the N-pole contact device are both arranged on the moving contact seat, and a convex column is arranged on the moving contact seat, and the lock is sleeved on the convex column through a through hole arranged thereon. The lock push rod mechanism comprises a spring and a push rod, the elastic force of the spring acts on the push rod, and the top end of the push rod abuts on the lock, and a slide groove is arranged above the moving contact seat, the slide groove comprises a curved portion and a straight portion, the curved portion of the slide groove is bent upward at one end close to the handle, and the curved portion and the straight portion are conductively arranged, and a resistance arm is arranged on the upper end of the lock, and a resistance surface is arranged on the resistance arm. After the circuit breaker is disconnected, the top end of the push rod abuts on the side surface of the lock, so that the resistance surface of the lock is close to the curved portion of the slide groove so as to contact the first The two ends are locked in the curved part of the slide groove, and the second end of the connecting rod is locked in the curved part of the slide groove, and the handle can be pushed to close the circuit breaker; after the circuit breaker is closed, the leakage tripping mechanism or the current tripping device of the circuit breaker acts on the lock to rotate the lock, and the contact surface loses the lock on the second end of the connecting rod. At this time, the second end of the connecting rod can slide into the straight part of the slide groove to realize the circuit breaker opening; the leakage tripping mechanism includes a voltage release and a linkage unit, wherein the linkage unit includes a lever and a pull rod, the lever is hinged on the base or the middle seat, and the two ends of the lever form a pull rod toggle end and a top rod contact end respectively, the pull rod is slidably arranged on the base or the middle seat, and the top rod contact end is arranged corresponding to the top rod position of the voltage releaser, and a lock contact surface is provided on the lever, and the lever toggle end can toggle the lever to slide, and the lock contact surface cooperates with the lock to pull the lock to rotate to realize the circuit breaker opening, and a reset spring for resetting the lever is also arranged between the top rod contact end and the middle seat or the base.

2. A leakage circuit breaker according to claim 1, characterized in that: A pressure limit surface is provided on the upper side of the bending portion. After the circuit breaker is closed, the second end of the connecting rod abuts against the pressure limit surface. At this time, the angle between the thrust direction generated by the handle on the second end of the connecting rod and the thrust direction generated by the pressure limit surface on the second end of the connecting rod is less than 180 degrees. The contact surface on the contact arm is L-shaped, and an inclined surface is provided below the contact surface to facilitate the second end of the connecting rod to slide into the bending portion. A groove is provided around the bottom of the slide groove.

3. A leakage circuit breaker according to claim 1 or 2, characterized in that: The test device also includes a power-taking mechanism, which includes a block arranged on a base, a slide groove formed between the blocks, a push rod arranged in the slide groove, the push rod is placed between the handle and the yoke of the voltage release, a pin shaft is arranged on the base, a torsion spring is sleeved on the pin shaft, a first extension arm of the torsion spring is abutted against a first end of the push rod, a second end of the push rod is arranged corresponding to a moving contact seat, rotation of the moving contact seat can drive the push rod to move, a notch is arranged on the upper side of the yoke of the voltage release, the first extension arm of the torsion spring is located at the notch, after the circuit breaker is opened, the moving contact seat pushes the push rod to move and compresses the torsion spring so that the first extension arm of the torsion spring is separated from the yoke, after the circuit breaker is closed, the moving contact mounting seat releases the push rod, and the push rod moves under the elastic force of the torsion spring so that the first extension arm of the torsion spring contacts the inner wall at the notch of the yoke to achieve electrical connection.

4. A leakage circuit breaker according to claim 2, characterized in that: The movable contact seat is provided with a protrusion at the periphery of the slide slot, and the protrusion is provided with an arc surface at the bending portion, and the arc surface is connected with the pressing and limiting surface as a whole to form the pressing and limiting surface of the second end of the connecting rod.

5. A leakage circuit breaker according to claim 1 or 2, characterized in that: The voltage release includes a coil, a coil frame, a yoke, and an iron core. The yoke is arranged in a "U" shape, a push rod is arranged at one end of the iron core, and the iron core is arranged in a flat plate shape. The coil frame includes a front end plate and a rear end plate arranged opposite to each other, and a hollow main frame body is connected between the front end plate and the rear end plate. The main frame body is flat, the iron core is passed through the main frame body, and the coil is wound on the main frame body. An opening for the push rod to enter and exit is provided on the front end plate, the bottom edge of the yoke is in contact with the front end surface of the front end plate, and the opposite two side edges of the yoke extend toward the rear end plate and are connected to the two sides of the rear end plate. A through hole for the iron core to enter and exit is provided at the corresponding opening position on the bottom edge of the yoke; a guide groove is provided on the base along the sliding direction of the pull rod, and a guide groove is provided on the pull rod. A guide rib is provided on one side of the base, and the guide rib is slidably arranged in the guide groove. A hinge shaft is provided on the base, and a hinge hole is provided on the push rod. The hinge shaft is passed through the hinge hole. A linkage groove is provided on the surface of the pull rod facing the base, and the toggle end of the pull rod extends into the linkage groove. Both end surfaces of the linkage groove facing the toggle end of the pull rod are arc surfaces. One end of the pull rod extends limited protrusions toward the base and the middle seat respectively. A convex rib is provided on the middle seat at the other end of the pull rod along the sliding direction of the pull rod. A positioning boss is provided at the contact end of the push rod, and a positioning plate is provided on the base. A convex rib is provided on the positioning plate to form a positioning groove. One end of the return spring is sleeved on the positioning boss and contacts the contact end of the push rod, and the other end contacts the positioning groove.

6. A leakage circuit breaker according to claim 1 or 2, characterized in that: An L-pole moving contact is installed on a convex column on one side of a lock catch installed on the moving contact seat, and the side of the moving contact seat on which the L-pole moving contact is installed is the first side, and a second convex column is coaxially arranged with the convex column on the other side of the moving contact seat, and an N-pole moving contact is installed on the second convex column, and this side of the moving contact seat is the second side, a positioning block is arranged below the convex block on the first side of the moving contact seat, an arc-shaped convex column is arranged around the bottom of the convex column on the first side of the moving contact seat, and a convex rib is arranged on the plane around the convex column on the first side of the moving contact seat, The lock buckle is provided with a mounting through hole, the mounting through hole of the lock buckle is sleeved on the first side convex column and forms a rotational fit with the arc-shaped convex column, the L-pole moving contact is sleeved on the convex column on the first side and its side surface abuts or is close to the end of the arc-shaped convex column, the L-pole moving contact is provided with a first bayonet, and a concave cavity is provided on the moving contact seat at a position corresponding to the first bayonet, a stopper is provided on the lower side of the convex block, and a limiting groove is formed between the stopper and the side surface of the first side of the moving contact seat, a first torsion spring is provided between the L-pole moving contact and the moving contact seat, and the first torsion spring is also sleeved on the convex column on the first side, The first torsion arm of the first torsion spring abuts in the limiting groove, the second torsion arm of the first torsion spring abuts on the first bayonet of the L-pole moving contact, the end wall of the second torsion arm of the first torsion spring has a bent portion, the bent portion is inserted into the concave cavity below the first bayonet, a positioning piece is arranged on the L-pole moving contact, the positioning piece is located between the positioning block and the protrusion of the moving contact seat, the abutment between the positioning piece and the positioning block or the protrusion constitutes the limitation of the rotation angle of the L-pole moving contact, a connecting column is arranged above the second protrusion on the second side of the moving contact seat, a convex edge is arranged around the periphery of the connecting column, and the convex edge A contact surface and a contact boss are respectively provided on the upper and lower parts, a third torsion spring is sleeved on the connecting column, the first torsion arm of the third torsion spring is in contact with the contact surface, and the second torsion arm of the third torsion spring can be in contact with the contact boss, a second stopper is provided below the contact boss, a positioning recess is formed between the second stopper and the side surface of the second side of the moving contact seat, a second bayonet is provided on the N-pole moving contact, a second concave cavity is provided on the second side of the moving contact seat and corresponding to the second bayonet, the N-pole moving contact is sleeved on the second convex column on the second side of the moving contact seat, and the N-pole moving contact is in contact with the moving contact A second torsion spring is arranged between the head seats, and the second torsion spring is also sleeved on the second convex column on the second side of the moving contact seat, the first torsion arm of the second torsion spring abuts on the positioning recess, the second torsion arm of the second torsion spring abuts on the second bayonet of the N-pole moving contact, and the end of the second torsion arm of the second torsion spring is bent and inserted into the second concave cavity, a positioning protrusion is arranged on the second side of the moving contact seat, and an N limit position piece is arranged on the N-pole moving contact and between the positioning protrusion and the abutment protrusion, and the abutment between the N limit position piece and the positioning protrusion or the abutment protrusion constitutes a rotation angle limit of the N-pole moving contact.

7. A leakage circuit breaker according to claim 3, characterized in that: An L-pole moving contact is installed on a convex column on one side of a lock catch installed on the moving contact seat, and the side of the moving contact seat on which the L-pole moving contact is installed is the first side, and a second convex column is coaxially arranged with the convex column on the other side of the moving contact seat, and an N-pole moving contact is installed on the second convex column, and this side of the moving contact seat is the second side, a positioning block is arranged below the convex block on the first side of the moving contact seat, an arc-shaped convex column is arranged around the bottom of the convex column on the first side of the moving contact seat, and a convex rib is arranged on the plane around the convex column on the first side of the moving contact seat, The lock buckle is provided with a mounting through hole, the mounting through hole of the lock buckle is sleeved on the first side convex column and forms a rotational fit with the arc-shaped convex column, the L-pole moving contact is sleeved on the convex column on the first side and its side surface abuts or is close to the end of the arc-shaped convex column, the L-pole moving contact is provided with a first bayonet, and a concave cavity is provided on the moving contact seat at a position corresponding to the first bayonet, a stopper is provided on the lower side of the convex block, and a limiting groove is formed between the stopper and the side surface of the first side of the moving contact seat, a first torsion spring is provided between the L-pole moving contact and the moving contact seat, and the first torsion spring is also sleeved on the convex column on the first side, The first torsion arm of the first torsion spring abuts in the limiting groove, the second torsion arm of the first torsion spring abuts on the first bayonet of the L-pole moving contact, the end wall of the second torsion arm of the first torsion spring has a bent portion, the bent portion is inserted into the concave cavity below the first bayonet, a positioning piece is arranged on the L-pole moving contact, the positioning piece is located between the positioning block and the protrusion of the moving contact seat, the abutment between the positioning piece and the positioning block or the protrusion constitutes the limitation of the rotation angle of the L-pole moving contact, a connecting column is arranged above the second protrusion on the second side of the moving contact seat, a convex edge is arranged around the periphery of the connecting column, and the convex edge A contact surface and a contact boss are respectively provided on the upper and lower parts, a third torsion spring is sleeved on the connecting column, the first torsion arm of the third torsion spring is in contact with the contact surface, and the second torsion arm of the third torsion spring can be in contact with the contact boss, a second stopper is provided below the contact boss, a positioning recess is formed between the second stopper and the side surface of the second side of the moving contact seat, a second bayonet is provided on the N-pole moving contact, a second concave cavity is provided on the second side of the moving contact seat and corresponding to the second bayonet, the N-pole moving contact is sleeved on the second convex column on the second side of the moving contact seat, and the N-pole moving contact is in contact with the moving contact A second torsion spring is arranged between the head seats, and the second torsion spring is also sleeved on the second convex column on the second side of the moving contact seat, the first torsion arm of the second torsion spring abuts on the positioning recess, the second torsion arm of the second torsion spring abuts on the second bayonet of the N-pole moving contact, and the end of the second torsion arm of the second torsion spring is bent and inserted into the second concave cavity, a positioning protrusion is arranged on the second side of the moving contact seat, and an N limit position piece is arranged on the N-pole moving contact and between the positioning protrusion and the abutment protrusion, and the abutment between the N limit position piece and the positioning protrusion or the abutment protrusion constitutes a rotation angle limit of the N-pole moving contact.

8. A residual current circuit breaker according to claim 6, characterized in that: The movable contact seat boss and the second boss are provided with through holes which penetrate each other, the base is provided with a first boss, the first boss is integrally provided with a first shaft, a first annular groove is provided around the connecting portion between the first shaft and the first boss, the second boss is sleeved in the first shaft and the end of the second boss is abutted in the first annular groove, the upper cover is provided with a second boss, the second boss is integrally provided with a second shaft, a second annular groove is provided around the connecting portion between the second shaft and the second boss, the boss is sleeved in the second shaft and the end of the boss is abutted in the second annular groove, the width of the cross-section of the first annular groove is greater than the wall thickness of the second boss, the width of the cross-section of the second annular groove is greater than the wall thickness of the boss, the length of the first shaft is greater than the length of the second shaft, and the first shaft abuts against the second shaft after the movable contact seat is installed on the base and the upper cover, and the abutting position is located in the boss.

9. A residual current circuit breaker according to claim 7, characterized in that: The movable contact seat boss and the second boss are provided with through holes which penetrate each other, the base is provided with a first boss, the first boss is integrally provided with a first shaft, a first annular groove is provided around the connecting portion between the first shaft and the first boss, the second boss is sleeved in the first shaft and the end of the second boss is abutted in the first annular groove, the upper cover is provided with a second boss, the second boss is integrally provided with a second shaft, a second annular groove is provided around the connecting portion between the second shaft and the second boss, the boss is sleeved in the second shaft and the end of the boss is abutted in the second annular groove, the width of the cross-section of the first annular groove is greater than the wall thickness of the second boss, the width of the cross-section of the second annular groove is greater than the wall thickness of the boss, the length of the first shaft is greater than the length of the second shaft, and the first shaft abuts against the second shaft after the movable contact seat is installed on the base and the upper cover, and the abutting position is located in the boss.

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