A circuit breaker

Abstract

The present invention relates to a circuit breaker, in particular to a latch spring device inside the circuit breaker. The present invention adopts the following technical solutions: A circuit breaker, the moving contact device of which includes a moving contact seat and a moving contact. A chute is provided at the upper end of the moving contact seat. The chute includes a bent portion and a straight portion. The first end of the connecting rod in the handle device is connected to the handle of the handle device, and the second end is placed in the chute. The latch device includes a latch spring mechanism and a latch. The latch is hinged to the moving contact seat, and a fork is provided at the upper end of the latch. After the circuit breaker is disconnected, the fork cooperates with the bent portion of the chute to lock the second end of the connecting rod. At this time, the handle can be pushed to close the circuit breaker. By adopting the above solution, the present invention overcomes the problems existing in the prior art and provides a new type of circuit breaker with a simple structure, convenient installation, and in particular, the elastic force of the latch spring gradually decreases or becomes zero during the process of the circuit breaker disconnecting to closing.

Description

Technical Field

[0001] The invention relates to a circuit breaker, in particular to a locking spring device inside the circuit breaker. Background Art

[0002] The tripping mechanism of the existing circuit breaker is usually provided with a lever, a lock and a tripping button, which has a complex structure and high cost. The size of the tripping button is not conducive to automated assembly, and the product has many parts and the risk of product failure. In addition, during the mechanical movement of the existing circuit breaker lever and the moving contact, friction produces plastic or metal particles that affect the movement of the contact. In addition, the product may fail when the U-shaped rod and the lever fail due to dust or other reasons during the tripping, etc. Summary of the invention

[0003] The present invention overcomes the problems existing in the prior art and provides a new type of circuit breaker with a simple structure and convenient installation, in particular, the elastic force of the lock spring on the lock gradually decreases or becomes zero during the process from the circuit breaker being opened to closed.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a circuit breaker, comprising a shell, a release, a handle device, a moving contact device, a locking device, a static contact, an arc extinguishing device and a double-metal pull rod device, characterized in that the moving contact device comprises a moving contact seat and a moving contact, a slide groove is arranged at the upper end of the moving contact seat, the slide groove comprises a curved portion and a straight portion, a first end of a connecting rod in the handle device is connected to the handle of the handle device, and a second end is placed in the slide groove, the locking device comprises a locking spring mechanism and a lock, wherein the lock is hingedly arranged on the moving contact seat, a pressing arm is arranged at the upper end of the lock, and after the circuit breaker is disconnected, the pressing arm cooperates with the curved portion of the slide groove to lock the second end of the connecting rod, and at this time the handle can be pushed to close the circuit breaker; after the circuit breaker is closed The push rod of the trip device acts on the lock to rotate the lock, and the pressure arm loses the lock on the second end of the connecting rod. At this time, the second end of the connecting rod slides into the straight part of the slide groove and the moving contact seat rotates to realize the disconnection of the circuit breaker. The lock spring mechanism includes a bracket, a push rod and a spring. The bracket is fixed in the shell and is located on one side of the lock. A long groove is provided in the bracket, and the push rod is placed in the long groove. One end of the spring abuts against the inner wall of the long groove, and the other end abuts against the first end of the push rod. The second end of the push rod protrudes from the long groove and is corresponding to the side wall of the lock. After the circuit breaker is opened, the end of the push rod abuts against the upper side wall of the lock. At this time, the second end of the connecting rod can be locked in the curved part of the slide groove to realize the closing operation of the circuit breaker. During the closing process of the circuit breaker, the thrust of the push rod on the lock gradually decreases or disappears.

[0005] By adopting the above scheme, a new method is adopted to lock or unlock the second end of the connecting rod 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. Even when the handle is locked or stuck, the action tripping can be realized; the lock spring has an elastic force on the push rod after the circuit breaker is disconnected, and at this time, the second end of the push rod acts on the upper side wall of the lock, mainly to make the pressure arm at the upper end of the lock close to the curved part of the slide groove, so that the pressure arm of the lock can cooperate with the curved part of the slide groove to lock the second end of the connecting rod, and then the circuit breaker handle is operated to close the circuit breaker. During the closing process, the elastic force of the lock spring gradually decreases, and after closing, the thrust of the push rod on the side of the lock becomes smaller or no, so that the circuit breaker is more sensitive and faster when operating, and the force pushing the lock is relatively small.

[0006] The further configuration of the present invention is that a push arm is arranged below the pressing arm of the lock catch, a fork is formed between the pressing arm and the push arm, the bottom of the fork is arranged in a U shape, the pressing arm and the push arm are arranged in a staggered manner, the opening of the fork is larger than the diameter of the second end of the connecting rod, the moving contact seat is arranged with a notch at the slide groove, the pressing arm can be placed at the notch, a boss is arranged below the slide groove of the moving contact seat, the push arm can be placed on the outer side of the boss, the upper side part of the boss and the lower side of the curved part of the slide groove constitute a pressing surface, and a limited position surface is also arranged below the curved part, so that the circuit breaker After the circuit breaker is opened, the limited position of the restricted surface of the second end of the connecting rod is located at the bottom of the bending part. At this time, the first end of the connecting rod connected to the handle is lower than the second end of the connecting rod placed on the bending part of the slide groove. During the closing process of the circuit breaker, the second end of the connecting rod is in contact with the pressing surface. At the same time, the angle between the thrust direction of the handle on the second end of the connecting rod and the supporting force direction of the pressing surface on the second end of the connecting rod is less than 180 degrees. After the circuit breaker is closed, the second end of the connecting rod is contacted by the pressing arm of the lock and is placed in the bending part and is in contact with the pressing surface. At this time, the push rod is separated from the upper side wall of the lock.

[0007] The U-shaped opening can be used to lock the second end of the connecting rod in the curved portion of the sliding slot after the circuit breaker is disconnected, and the upper side of the U-shaped opening can also generate a mutually resisting force with the second end of the connecting rod during the closing process of the circuit breaker. In this way, after the circuit breaker is closed to a certain extent, the lock can also lock the second end of the connecting rod in the curved portion without being subjected to external force. The external force here is the force other than the connecting rod and the lock. The resisting arm and the pull arm are staggered, so that the connection and cooperation with the moving contact seat are more reasonable and the volume is small. After the circuit breaker is closed, the push rod and the upper side of the lock are The wall is separated, and the force on the lock is reduced, and the requirements for the release are reduced; after the circuit breaker is opened, the limited position of the limited position surface of the second end of the connecting rod is located at the bottom of the curved part. At this time, the first end of the connecting rod connected to the handle is lower than the second end of the connecting rod placed in the curved part of the slide groove. This can ensure that when the circuit breaker is closed, pushing the handle can cause the moving contact seat to rotate. During the closing process of the circuit breaker, the second end of the connecting rod is in contact with the pressing surface. At the same time, the angle between the thrust direction of the handle on the second end of the connecting rod and the supporting force direction of the pressing surface on the second end of the connecting rod is less than 180 degrees. In this way, the combined force of the thrust and the supporting force is upward, ensuring that the second end of the connecting rod can slide into the straight part of the slide groove after the lock action. After the circuit breaker is closed, the second end of the connecting rod is contacted by the locking pressing arm of the lock and is placed in the curved part and is pressed against the pressing surface.

[0008] The present invention is further configured as follows: a mounting post is provided on the movable contact seat, the lock buckle and the movable contact are both movably sleeved on the mounting post, an arc-shaped convex post is provided around the bottom of the mounting post, a notch is formed between the arc-shaped convex post and the arc-shaped convex post, a circular through hole is provided on the lock buckle, the lock buckle is sleeved on the arc-shaped convex post through the circular through hole, a convex rib is provided on the movable contact seat and located at the periphery of the mounting seat, and the inner side surface of the lock buckle contacts the convex rib; the movable contact is sleeved on the mounting post and its side The surface of the torsion spring abuts against or is close to the end of the arc-shaped convex column, a torsion spring seat is arranged below the boss, a positioning block is arranged on the moving contact seat below the spring seat, a bayonet is arranged on the moving contact, a torsion spring is arranged between the moving contact and the moving contact seat, and the torsion spring is also sleeved on the mounting column, the first torsion arm of the torsion spring abuts against the torsion spring seat, and the second torsion arm of the torsion spring abuts against the bayonet of the moving contact, and a positioning piece is arranged on the moving contact for cooperating with the positioning block to limit the moving contact, and the moving contact can rotate on the moving contact seat under the action of external force.

[0009] By adopting the above scheme, the flexibility of the lock rotation can be well guaranteed, and metal particles or dust can be prevented from adhering to the lock and the moving contact seat. The setting of the convex rib can reduce the friction between the lock and the moving contact seat. The above scheme is adopted between the moving contact and the moving contact seat, which can ensure that the mechanism can push the moving contact to disconnect first when the moving current is large, thereby increasing the safety of the product.

[0010] The further configuration of the present invention is: it also includes a power-taking mechanism for a test device, the power-taking mechanism for the test device includes a block arranged on a shell, a long groove is formed between the blocks, a moving rod is arranged in the long groove, the moving rod is placed between the handle and the yoke of the releaser, a pin shaft is arranged on the shell, a power-taking torsion spring is sleeved on the pin shaft, a first extension arm of the power-taking torsion spring is abutted against a first end of the moving rod, a second end of the moving rod is arranged corresponding to a moving contact seat, the moving contact seat can drive the moving rod to move by rotating, a notch is arranged on the upper side of the yoke of the releaser, the first extension arm of the power-taking torsion spring is located at the notch, after the circuit breaker is opened, the moving contact seat pushes the moving rod to move and compresses the power-taking torsion spring so that the first extension arm of the power-taking torsion spring is separated from the yoke, after the circuit breaker is closed, the moving contact seat releases the moving rod, and the moving rod moves under the elastic force of the power-taking torsion spring so that the first extension arm of the power-taking torsion spring contacts the inner wall at the notch of the yoke to achieve conductivity.

[0011] By adopting the above scheme, the power of the power-taking torsion spring is taken from the yoke of the release, and the moving rod cooperates with the moving contact seat to achieve movement. The moving rod pushes the first extension arm of the power-taking 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, no matter how the circuit breaker is wired, there will be no electricity when the test button is pressed, thereby protecting the circuit breaker.

[0012] A further arrangement of the present invention is that the bimetallic pull rod device includes a pull rod and a bimetallic strip, a guide groove is arranged on the shell, the pull rod is arranged in the guide groove, the middle part of the pull rod is a straight bar, and a first and a second vertical rod are arranged at both ends of the pull rod, wherein the first vertical rod cooperates with the lock buckle, and the second vertical rod cooperates with the bimetallic strip, the bimetallic strip bends and pulls the second vertical rod to realize the sliding of the pull rod, and after the pull rod slides, the first vertical rod can pull the lock buckle to realize the opening of the circuit breaker, and a protrusion is arranged on the lock buckle, and when the pull rod is placed in the guide groove, the protrusion is arranged close to the surface of the middle part of the pull rod, a limiting groove is arranged at a position corresponding to the end of the first vertical rod on the shell, the end of the first vertical rod is placed in the limiting groove, a step is arranged on one side of the first vertical rod, and a boss is arranged on the shell to cooperate with it to prevent the pull rod from being misplaced.

[0013] By adopting the above solution, the pull rod can move well in the guide groove to realize the circuit breaker tripping. In addition, the pull rod moves more stably in the guide groove without malfunction.

[0014] A further arrangement of the present invention is that the bracket divides the corresponding space in the shell into two, wherein the space close to one side of the base is a first space, a button mechanism is arranged in the first space, and the space close to one side of the upper cover is a second space, an indicator light mechanism is arranged in the second space, the button mechanism includes a button and a reset torsion spring, a through hole is arranged on the upper side surface of the base, an L-shaped boss is arranged on the inner side of the base and on both sides of the through hole, the two L-shaped bosses are symmetrically arranged, the corner portion of the L-shaped boss is arranged close to the upper side surface of the base, the upper side of the L-shaped boss is connected as a whole with the upper side surface of the base, the side surface of the L-shaped boss is connected as a whole with the inner side surface of the base, a guide groove is arranged on the inner side surface of the base and between the L-shaped bosses, the button is arranged between the two L-shaped bosses, and its upper end can pass through the through hole, convex edges are arranged on the left and right sides of the button respectively, and after the button is reset, its convex edge abuts against the inner side surface of the L-shaped boss, and a protrusion is arranged on the inner side of the button, which The light guide member is placed in the guide slot and forms a sliding match with the guide slot, a convex piece is arranged at the lower end of the button, a slot is arranged on the convex piece, the reset torsion spring is sleeved on the mounting column of the base, and its movable arm abuts against the slot of the button convex piece, the indicator light mechanism comprises a circuit board with an LED lamp and a light guide member, an opening is arranged on the upper side surface of the base and located at the second space, the light guide member is partially placed on the opening, and a first and a second positioning blocks are respectively arranged on the bracket and located on both sides of the opening, the light guide member is arranged between the two positioning blocks, an extension portion is arranged on one side of the second positioning block, a pin is arranged on the extension portion, a first convex rib abutting against the first positioning block is arranged on one side of the light guide member, an extension arm is arranged on the other side of the light guide member, a groove is arranged on the lower side of the extension arm, the groove is mounted on the pin, a positioning boss is arranged on the side of the light guide member close to the upper cover, a positioning slot cooperating with the positioning boss is arranged on the upper cover, and the positioning boss is placed in the positioning slot.

[0015] By adopting the above scheme, the button mechanism and the indicator light mechanism can be respectively placed in two relatively independent spaces, which makes installation more convenient. In addition, the button is arranged on the base in the above manner, so the button is relatively stable. In particular, two L-shaped bosses are provided to protect the base from being damaged when the button is pressed with great force. In addition, the creepage distance can be increased, greatly improving safety. The light guide is relatively stable when installed in the above manner.

[0016] A further configuration of the present invention is that: the magnetic yoke includes a first mounting portion, a second mounting portion and an arc striking portion, wherein the coil device of the release is mounted on the first mounting portion, a contact is arranged on the second mounting portion to form a static contact, the arc striking portion is located below the second mounting portion and is bent, the coil in the coil device of the release is connected to the upper side of the first mounting portion of the magnetic yoke, the moving contact includes a mounting portion, a conductive portion, a contact portion and an arc striking angle, the moving contact is connected to the moving contact seat through the mounting portion, and the connecting wire of the circuit breaker is connected to the upper end of the conductive portion of the moving contact or the mounting portion. A mounting circular hole is provided on the mounting portion of the moving contact, and the moving contact is hingedly connected to the moving contact seat through the mounting circular hole, and the conductive portion of the moving contact is in the shape of a straight strip; the first mounting portion of the yoke includes first and second side edges and a transverse side located at the upper ends of the first and second side edges, and the transverse side and the first and second side edges form a U-shaped mounting area, and the release coil is installed on the U-shaped mounting area, the lower end of the second side edge is integrally or fixedly arranged with the second mounting portion, the second side edge is straight, and the release coil is connected to the transverse side or the upper end of the second side edge.

[0017] By adopting the above scheme, when the current is disconnected, no matter what the current direction is, the repulsive force on the moving contact moves in the repulsion direction, the current carrying length of the moving contact is the longest, and the current channel on the yoke is the longest, which is conducive to the repulsion of the moving contact. When the moving contact is repelled, an arc is generated between the static contact and the moving contact, and the changing force direction of the arc moves toward the arc striking part and the arc striking angle, so that the arc moves quickly under the action of the repulsive force, thereby increasing the arc transfer speed, reducing the ablation of the contacts, and improving the breaking capacity.

[0018] The present invention is further configured as follows: it also includes an N-pole contact mechanism, the N-pole contact mechanism includes an N-pole static contact, an N-pole moving contact and an N-pole arc-starting plate, an N-pole moving contact mounting column is also provided on the moving contact seat on the other side of the mounting column, the N-pole moving contact is sleeved on the N-pole moving contact mounting column, and a second torsion spring is provided between the two, a connecting column is provided above the N-pole moving contact mounting column, a convex edge is provided on the periphery of the connecting column, a torsion spring abutting surface and a torsion spring abutting boss are provided on the convex edge, a third torsion spring is sleeved on the connecting column, one end of the third torsion spring abuts on the torsion spring abutting surface, and the other end abuts on the card table of the shell, the N-pole static contact includes There are a wiring part, a contact part and an arc-striking part, a first wire is connected to the end of the wiring part, a second wire is connected between the N-pole moving contact and the N-pole arc-striking plate, the N-pole power supply line is also connected to the N-pole arc-striking plate, the wiring part of the N-pole static contact is a straight strip, a card slot is provided on the shell, the wiring part is placed in the card slot, the N-pole arc-striking plate includes a straight side, a vertical side and a hypotenuse, wherein the hypotenuse is inclined to one side of the straight side, and an arc-striking area is formed between the hypotenuse and the arc-striking part of the N-pole static contact, the N-pole power supply line is connected to the end of the straight side, and the second wire is connected to one end of the vertical side close to the moving contact or at the junction of the vertical side and the hypotenuse.

[0019] By adopting the above scheme, when the arc of the N pole is transferred from the N pole moving contact to the N pole arc starting plate, a U-shaped current channel is formed between the N pole power supply line and the N pole arc starting plate. According to the left-hand rule and the right-hand rule, no matter what the current direction is, the arc moves in the elongated direction, which is conducive to the extinction of the arc and improves the breaking capacity.

[0020] A further arrangement of the present invention is that mounting columns and N-pole mounting columns are integrally arranged on both sides of the moving contact seat, the mounting columns and the N-pole mounting columns are located on the same axis, and through holes that penetrate each other are arranged on the mounting columns and the N-pole mounting columns, the base is provided with a first boss, a first shaft is integrally arranged on the first boss, a first annular groove is arranged around the connecting portion between the first shaft and the first boss, the N-pole mounting column is sleeved on the first shaft, and the end of the N-pole mounting column abuts in the first annular groove after the N-pole mounting column is sleeved, the upper cover is provided with a second boss, a second shaft is integrally arranged on the second boss, a second annular groove is arranged around the connecting portion between the second shaft and the second boss, the mounting column is sleeved on the second shaft, and the end of the mounting column abuts in the second annular groove after the mounting column abuts, the width of the cross-section of the first annular groove is greater than the wall thickness of the N-pole mounting column, the width of the cross-section of the second annular groove is greater than the wall thickness of the mounting column, 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 mounting column.

[0021] By adopting the above scheme, the moving contact seat can be conveniently installed on the base and the upper cover. The above installation method has multiple insurance functions. No matter whether the cylindrical mounting column 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; the above installation structure is more stable. In addition, the position of the interference is located inside the mounting column. The purpose is that since there are relatively more parts arranged on the mounting column, it is more solid.

[0022] A further configuration of the present invention is that a first buffer zone and a second buffer zone are respectively arranged on both sides of the vertical edge of the N-pole arc-starting plate on the middle seat, a notch is arranged on the side of the vertical edge close to the base, an exhaust channel is formed between the notch and the base, the exhaust channel connects the first buffer zone and the second buffer zone, the first buffer zone is arranged at a position corresponding to the area surrounded by the straight edge, vertical edge and oblique edge of the arc-starting plate, the bottom of the first buffer zone is arranged to be recessed inward, and the straight edge and vertical edge of the arc-starting plate are arranged vertically.

[0023] By adopting the above scheme, the high-pressure gas in the arc striking zone can pass through it, so that the first buffer zone and the second buffer zone can enter the gas respectively, which greatly reduces the pressure in the arc striking zone. In addition, the exhaust channel is arranged here on the vertical side. The gas running from this position will not affect the installation of other components of the circuit breaker, and will not cause other interference, so that the product structure is simple and reasonable and the product volume is reduced.

[0024] A further configuration of the present invention is: an L-shaped first baffle is arranged on the middle seat and below and on one side of the arc extinguishing zone, a second baffle is arranged on the base and plugged into the first baffle, the first baffle and the second baffle are plugged into each other to form an arc isolation edge, a first exhaust through hole connected to the outside is arranged on the side of the recessed portion of the first buffer zone, and a second exhaust through hole connected to the outside is arranged on the side of the second buffer zone.

[0025] By adopting the above solution, the arc isolation edge can well prevent the arc and gas from escaping from the gap between the shells, and discharge them according to the set exhaust holes and the buffer chamber and the exhaust holes, which greatly increases the safety of the product. The first exhaust hole is arranged on the side of the recessed part of the first buffer zone, so that the first exhaust hole is separated from the arc striking plate, which will not affect the installation of the arc striking plate and the safety of the product.

[0026] The present invention will be further described below in conjunction with specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of the lock buckle of the product of the embodiment of the present invention in the disconnected position;

[0028] Figure 2 This is a structural diagram of the lock buckle of the product of the embodiment of the present invention when it is just closed;

[0029] Figure 3 This is a structural diagram of the lock buckle of the product of the embodiment of the present invention during the closing process;

[0030] Figure 4 This is a structural diagram of the lock of the product of the embodiment of the present invention after closing;

[0031] Figure 5 This is a structural diagram of the lock when the product of the embodiment of the present invention is about to be released;

[0032] Figure 6 This is a structural diagram of the lock of the product of the embodiment of the present invention during forced tripping;

[0033] Figure 7 This is a structural diagram of the lock during the process of the handle returning to its original position after the product of the embodiment of the present invention is released;

[0034] Figure 8 This is a structural diagram of the lock when the moving contact of the product of the embodiment of the present invention is knocked open by the electromagnetic mechanism when the short circuit occurs;

[0035] Fig. 9 It is a structural diagram of the lock when the movable contact of the product of the embodiment of the present invention is knocked open by the electromagnetic mechanism during a short circuit and the contact bounces open but the handle does not return to its original position;

[0036] Fig.10This is a three-dimensional diagram of a lock according to an embodiment of the present invention;

[0037] Fig.11 A three-dimensional diagram of a moving contact mounting seat according to an embodiment of the present invention;

[0038] Fig.12 An exploded view of a lock spring mechanism according to an embodiment of the present invention;

[0039] Fig.13 It is a structural diagram of a power supply mechanism of a reflection test device according to an embodiment of the present invention;

[0040] Fig.14 It is a three-dimensional diagram reflecting the power supply mechanism of the test device according to the embodiment of the present invention;

[0041] Fig.15 This is a structural diagram of a double-metal pull rod device according to an embodiment of the present invention;

[0042] Fig.16 A cross-sectional view of a double-gold pull rod device according to an embodiment of the present invention

[0043] Fig.17 It is a schematic diagram reflecting the structure of a moving contact in a closed state of a circuit breaker according to an embodiment of the present invention;

[0044] Fig.18 This is a structural diagram of a release yoke according to an embodiment of the present invention;

[0045] Fig.19 This is a schematic diagram of the repulsive force generated when current passes through the moving and static contacts in an embodiment of the present invention;

[0046] Fig. 20 This is a structural diagram of an N-pole contact mechanism according to an embodiment of the present invention;

[0047] Fig.21 This is a schematic diagram of the current direction and repulsive force generated by the N-pole moving contact and the N-pole static contact in an embodiment of the present invention;

[0048] Fig. 22 This is a schematic diagram of the current direction and the repulsive force generated by the N-pole arc-starting plate and the N-pole static contact in an embodiment of the present invention;

[0049] Fig.23 This is a force analysis diagram of the connecting rod after the circuit breaker is closed according to an embodiment of the present invention;

[0050] Fig.24 yes Fig.23 Schematic diagram of the force direction;

[0051] Fig.25 This is a structural diagram of a button mechanism according to an embodiment of the present invention;

[0052] Fig.26 This is a structural diagram of a light guide member according to an embodiment of the present invention;

[0053] Fig. 27 is a three-dimensional diagram of a button according to an embodiment of the present invention;

[0054] Fig.28 is a three-dimensional diagram of a light guide member according to an embodiment of the present invention;

[0055] Fig.29 A structural diagram of the base installation button position of an embodiment of the present invention;

[0056] Fig.30 This is a structural diagram of the upper cover of an embodiment of the present invention;

[0057] Fig.31 This is a structural diagram of a bracket according to an embodiment of the present invention;

[0058] Fig.32 This is a structural diagram reflecting the cooperation between the button, the base and the bracket according to an embodiment of the present invention;

[0059] Fig.33 This is a structural diagram reflecting the cooperation between the light guide, the bracket and the upper cover according to an embodiment of the present invention;

[0060] Fig.34 A cross-sectional structural diagram reflecting the first axis and the second axis of an embodiment of the present invention;

[0061] Fig.35 This is a partial structural diagram of the base reflecting the first axis of an embodiment of the present invention;

[0062] Fig.36 This is a partial structural diagram of the upper cover reflecting the second axis of an embodiment of the present invention;

[0063] Fig.37 This is a structural diagram of the moving contact seat reflecting the N-pole mounting column of an embodiment of the present invention;

[0064] Fig.38 This is a structural diagram of the moving contact seat reflecting the mounting column of an embodiment of the present invention;

[0065] Fig.39 A structural diagram of a base in an embodiment of the present invention;

[0066] Fig.40 It is a structural diagram of a seat in an embodiment of the present invention;

[0067] Fig.41 A three-dimensional diagram of an N-pole arc starting plate in an embodiment of the present invention;

[0068] Fig.42 A cross-sectional view showing the first buffer and the second buffer in an embodiment of the present invention;

[0069] Fig.43 is a cross-sectional view reflecting the notch and the second buffer chamber in an embodiment of the present invention;

[0070] Fig.44 It is a cross-sectional view reflecting the first buffer zone in an embodiment of the present invention. DETAILED DESCRIPTION

[0071] like Figure 1-Figure 44As shown, a circuit breaker includes a housing 1, a trip device 2, a handle device 3, a moving contact device 4, a locking device, a static contact, an arc extinguishing device and a double-metal pull rod device 8. Here, we need to explain that the housing 1 refers to the upper cover 15, the middle seat 16 and the base 14 of the circuit breaker and some brackets arranged on the upper cover or the middle seat or the base mainly for fixing the components. In the embodiment of the present invention, the moving contact device 4 includes a moving contact seat 41 and a moving contact 42. The upper end of the moving contact seat 41 is provided with a slide groove 411, and the slide groove 411 includes a curved portion 4111 and a straight portion 4112. The first end of the connecting rod 31 in the handle device 3 is connected to the handle of the handle device, and the second end is placed in the slide groove 411. The locking device includes a locking The spring mechanism 52 and the lock buckle 51, wherein the lock buckle 51 is hingedly arranged on the moving contact seat 41, and a pressing arm 5112 is arranged on the upper end of the lock buckle 51. After the circuit breaker is disconnected, the pressing arm 5112 cooperates with the bent portion 4111 of the slide groove 411 to lock the second end of the connecting rod 31. At this time, the handle can be pushed to close the circuit breaker; after the circuit breaker is closed, the release device 2 of the circuit breaker acts on the lock buckle 51 to rotate the lock buckle 51, and the pressing arm 5112 loses the lock on the second end of the connecting rod 31. At this time, the second end of the connecting rod 31 slides into the slide groove 411. The straight portion 4112 of the moving contact seat 41 rotates to disconnect the circuit breaker, and the second end of the connecting rod 31 slides into the straight portion 4112 of the sliding groove 411, so that the connecting rod 31 does not generate thrust on the moving contact seat 41, and the moving contact seat 41 can drive the moving contact 42 to rotate to achieve opening. The lock spring mechanism 52 includes a bracket 521, a push rod 522 and a spring 523. The bracket 521 is fixed in the housing 1 and is located on one side of the lock 51. A long groove 5211 is provided in the bracket 521, and the push rod 522 is placed in the long groove 5211. One end of the spring 523 abuts against the inner wall of the long groove 5211, and the other end abuts against the first end of the push rod 522. The second end 5221 of the push rod 522 protrudes from the long groove 5211 and is arranged corresponding to the upper side wall of the lock buckle 51. After the circuit breaker is opened, the end of the push rod 522 abuts against the upper side wall of the lock buckle 51. At this time, the second end of the connecting rod 31 can be locked in the curved portion 4111 of the slide groove 411 to realize the closing operation of the circuit breaker. During the closing process of the circuit breaker, the thrust of the push rod 522 on the lock buckle 51 gradually decreases or disappears.By adopting the above scheme, a new method is adopted to lock or unlock the second end of the connecting rod 31 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. When the handle is locked or stuck, the product can also be tripped. The spring 523 has elastic force on the push rod 522 after the circuit breaker is disconnected. At this time, the second end of the push rod 522 acts on the upper side wall of the lock buckle 51, mainly to make the pressing arm 5112 at the upper end of the lock buckle 51 close to the bent portion 4111 of the slide groove 411, so that the pressing arm 5112 of the lock buckle 51 can cooperate with the bent portion 4111 of the slide groove 411 to lock the second end of the connecting rod 31. At this time, the circuit breaker handle is operated to close the circuit breaker. During the closing process, the elastic force of the spring 523 gradually decreases. After closing, the thrust of the push rod 522 on the side of the lock buckle 51 is reduced or eliminated. In this way, the circuit breaker is more sensitive and faster when it is in action, and the force pushing the lock buckle 51 is relatively small.

[0072] In the embodiment of the present invention, a lever arm 5113 is provided below the pressing arm 5112 of the lock buckle 51, a fork 511 is formed between the pressing arm 5112 and the lever arm 5113, the bottom of the fork 511 is U-shaped 5111, the pressing arm 5112 and the lever arm 5113 are staggered, the opening between the pressing arm 5112 and the lever arm 5113 is larger than the diameter of the second end of the connecting rod 31, ensuring that the end of the connecting rod 31 is not interfered with, the moving contact seat 41 is provided with a notch 412 at the slide groove 411, the pressing arm 5112 is placed at the notch 412, and a boss 414 is provided below the notch 412 of the moving contact seat 41 , the lever arm 5113 is placed on the outer side of the boss 414, the upper side portion of the boss 414 and the lower side of the curved portion 4111 of the slide groove 411 form a pressing surface 41111, and a limited position surface 41112 is further provided below the curved portion 4111. After the circuit breaker is opened, the limited position of the limited position surface 41112 of the second end of the connecting rod 31 is located at the bottom of the curved portion 4111. At this time, the first end G of the connecting rod 31 connected to the handle is lower than the second end of the connecting rod 31 placed on the curved portion 4111 of the slide groove 411. During the closing process of the circuit breaker, the second end of the connecting rod 31 contacts the pressing surface 41111, and at the same time, the thrust direction F1 and F2 of the handle on the second end of the connecting rod 31 are The angle A between the direction of the supporting force F2 of the pressing surface 41111 and the second end of the connecting rod 31 is less than 180 degrees. After the circuit breaker is closed, the second end of the connecting rod 31 is resisted by the pressing arm 5112 of the lock buckle 51 and is placed in the curved portion 4111 and is pressed against the pressing surface 41111. At this time, the push rod 522 is separated from or resists the upper side wall of the lock buckle 51. By adopting the above scheme, the bottom of the fork 511 is U-shaped 5111. In this way, after the circuit breaker is disconnected, the U-shaped mouth can well lock the second end of the connecting rod 31 in the curved portion 4111 of the slide groove 411, and the upper side surface of the U-shaped mouth is also convenient for contact with the connecting rod 31 during the closing process of the circuit breaker. A mutually resisting force is generated between the second ends of the rod 31, so that after the circuit breaker is closed to a certain extent, the lock buckle 51 can also lock the second end 5221 of the connecting rod 31 on the bending portion 4111 without being subjected to external force. The external force here is the force other than the connecting rod 31 and the lock buckle 51; the pressing arm 5112 and the shifting arm 5113 are staggered, so that the connection and cooperation with the moving contact seat 41 are more reasonable and the volume is small; finally, when the circuit breaker needs to be disconnected after closing, the shifting arm 5113 can also assist in shifting the second end of the connecting rod 31, which can well prevent impurities from sticking to the second end of the connecting rod 31 and ensure the stability of the operation.

[0073] In the embodiment of the present invention, the movable contact seat 41 is provided with a mounting column 413, the lock buckle 51 and the movable contact 42 are both movably sleeved on the mounting column 413, the bottom of the mounting column 413 is provided with an arc-shaped convex column 4131 around it, and a gap is formed between the arc-shaped convex column 4131 and the arc-shaped convex column 4131, and a circular through hole 512 is provided on the lock buckle 51, and the lock buckle 51 is sleeved on the arc-shaped convex column 4131 through the circular through hole 512, and a convex rib 4132 is provided on the movable contact seat 41 and located around the mounting column 413, and the inner side surface of the lock buckle 51 is in contact with the convex rib 4132; the movable contact 42 is sleeved on the mounting column 413 and its side A torsion spring seat 4141 is provided below the boss 414, which abuts or is close to the end of the arc-shaped convex column 4131. A positioning block 415 is provided on the moving contact seat 41 below the torsion spring seat 4141. A bayonet 421 is provided on the moving contact 42. A torsion spring 43 is provided between the moving contact 42 and the moving contact seat 41. The torsion spring 43 is also sleeved on the mounting column 413. The first torsion arm of the torsion spring 43 abuts against the torsion spring seat 4141, and the second torsion arm of the torsion spring 43 abuts against the bayonet 421 of the moving contact 42. A positioning piece 422 is provided on the moving contact 42 for cooperating with the positioning block 415 to limit the moving contact. Under the action of external force, the moving contact 42 can rotate on the moving contact seat 41. By adopting the above-mentioned scheme, the flexibility of rotation of the lock buckle 51 can be well guaranteed, and metal particles or dust can be well prevented from adhering to the lock buckle 51 and the moving contact seat 41. The setting of the rib 4132 can reduce the friction between the lock buckle 5 and the moving contact seat 41. The above-mentioned scheme is adopted between the moving contact 42 and the moving contact seat 41, which can ensure that the mechanism of the moving contact 42 can first push the moving contact to disconnect under the condition of large current, thereby increasing the safety of the product.

[0074] In the embodiment of the present invention, a test device power-taking mechanism 6 is also included. The test device power-taking mechanism 6 includes a block 11 arranged on the shell 1, and a long groove is formed between the blocks 11. A moving rod 61 is arranged in the long groove. The moving rod 61 is placed between the handle and the yoke 21 of the release 2. A pin shaft 12 is arranged on the shell 1, and a power-taking torsion spring 62 is sleeved on the pin shaft 12. The first extension arm 621 of the power-taking torsion spring 62 is set on the first end of the moving rod 61, and the second end of the moving rod 61 is set corresponding to the moving contact seat 41. The moving contact seat 41 rotates to drive the moving The rod 61 moves, and a notch 218 is provided on the upper side of the yoke 21 of the release 2. The extended portion of the first extended arm 621 of the power-taking torsion spring 62 is located at the notch 218. After the circuit breaker is opened, the moving contact seat 41 pushes the moving rod 61 to move and compress the power-taking torsion spring 62 so that the first extended arm 621 of the power-taking torsion spring 62 is separated from the yoke 21. After the circuit breaker is closed, the moving contact seat 41 releases the moving rod 61. The moving rod 61 moves under the elastic force of the power-taking torsion spring 62 so that the first extended arm 621 of the power-taking torsion spring 62 contacts the inner wall of the notch 218 of the yoke 21 to achieve conductivity. By adopting the above scheme, the power of the power-taking torsion spring 62 is taken from the yoke 21 of the trip device. In addition, the moving rod 61 cooperates with the moving contact seat 41 to achieve movement. The moving rod 61 pushes the first extension arm 621 of the power-taking torsion spring 62 to move in the notch 218 of the yoke 21 to achieve contact or separation with the yoke 21. The above method of taking power can separate the first extension arm 621 from the yoke 21 after the moving contact is disconnected, and there will be no contact. In this way, no matter how the circuit breaker is connected, when the circuit breaker is in the disconnected state, there will be no electricity when the test button is pressed, thereby protecting the circuit breaker and achieving positive and reverse wiring.

[0075] In the embodiment of the present invention, the bimetallic pull rod device 8 includes a pull rod 81 and a bimetallic strip 82, a guide groove is provided on the shell 1, the pull rod 81 is arranged in the guide groove 13, the middle part of the pull rod 81 is a straight bar, and the first and second vertical rods 821 and 822 are provided at both ends of the pull rod 81, wherein the first vertical rod 821 cooperates with the lock buckle 51, and the second vertical rod 822 cooperates with the bimetallic strip 82, the bimetallic strip 82 bends and pulls the second vertical rod 822 to realize the sliding of the pull rod 81, and after the pull rod 81 slides, the first vertical rod 821 can pull the lock buckle 51 to realize the circuit breaker opening, and the lock buckle 51 is provided with a protrusion 515. When the pull rod 81 is placed in the guide groove 13, the protrusion 515 is arranged close to the surface of the middle part of the pull rod 81, so that the pull rod 81 can move well in the guide groove 13 to realize the circuit breaker tripping, and in addition, the pull rod 81 will move more stably in the guide groove 13 without malfunction.

[0076] In the embodiment of the present invention, the bracket 521 divides the corresponding space in the shell 1 into two, wherein the space close to the side of the base 14 is the first space 141, and the button mechanism is arranged in the first space 141; the space close to the side of the upper cover 15 is the second space 151, and the indicator light mechanism B is arranged in the second space 151; the button mechanism A includes a button A1; a through hole 142 is arranged on the upper side of the base 14; an L-shaped boss 143 is arranged on the inner side of the base 14 and on both sides of the through hole 142; the two L-shaped bosses 143 are symmetrically arranged; the corner portion of the L-shaped boss 143 is arranged close to the upper side of the base 14; the upper side of the L-shaped boss 143 is connected to the upper side of the base 14 as a whole; the side of the L-shaped boss 143 is connected to the base 1 4 is connected as one body, a guide slot 144 is provided on the inner side of the base 14 and between the L-shaped bosses 143, the button A1 is provided between the two L-shaped bosses 143, and its upper end can pass through the through hole 142, and convex edges A11 are provided on the left and right sides of the button A1 respectively, and after the button A1 is reset, its convex edge A11 abuts against the inner side of the L-shaped boss 143, and a convex block A12 is provided on the inner side of the button A1, and the convex block A12 is placed in the guide slot 144 and forms a sliding fit with the guide slot 144, and a convex piece A13 is provided at the lower end of the button A1, and a slot A131 is provided on the convex piece A13, and the power-taking torsion spring 62 is sleeved on the pin shaft 12, and its second extension arm abuts against the slot A131 of the button convex piece A13, so that The indicator light mechanism B includes a circuit board with an LED lamp and a light guide B2. An opening 145 is provided on the upper side of the base 14 and located at the second space 151. The light guide B2 is partially placed on the opening 145. A first and a second positioning blocks 5213 and 5212 are respectively provided on the bracket 521 and located on both sides of the opening 145. The light guide B2 is arranged between the two positioning blocks 5213 and 5212. An extension portion is provided on one side of the second positioning block 5212, and a pin 1631 is provided on the extension portion. A first convex rib B21 that abuts against the first positioning block 5213 is provided on one side of the light guide B2. An extension arm B22 is provided on the other side of the light guide B2, and a groove B221 is provided on the lower side of the extension arm B22. The groove B221 is mounted on the pin 1631, and a positioning boss B23 is provided on the side of the light guide B2 close to the upper cover 15. A positioning groove 152 cooperating with the positioning boss B23 is provided on the upper cover 15, and the positioning boss B23 is placed in the positioning groove 152; by adopting the above scheme, the button mechanism A and the indicator light mechanism B can be respectively located in two relatively independent spaces, which is more convenient to install. In addition, the button A1 is arranged on the base 14 in the above manner, so that the button A1 is relatively stable, especially the two L-shaped bosses 143 can protect the base 14 from being damaged when the button A1 is pressed with great force, and the creepage distance can also be increased, which greatly improves the safety. The light guide B2 is relatively stable when installed in the above manner.

[0077] In the embodiment of the present invention, the yoke 21 includes a first mounting portion 211, a second mounting portion 212 and an arc-striking portion 213, wherein the coil device of the release 2 is mounted on the first mounting portion 211, and the second mounting portion 212 is provided with a contact to form a static contact, and the arc-striking portion 213 is located below the second mounting portion 212 and is bent, and the coil in the coil device of the release 2 is connected to the upper side of the first mounting portion 211 of the yoke 21, and the moving contact 42 includes a mounting portion 425, a conductive portion 426, a contact portion 423 and an arc-striking angle 424, and the moving contact 42 is connected to the moving contact seat 41 through the mounting portion 425, and the connecting wire C of the circuit breaker is connected to the upper end of the conductive portion 426 of the moving contact 42 or the mounting portion 425 position, and the moving contact 42 A mounting circular hole is provided on the mounting portion 425, and the moving contact 42 is connected and hinged to the moving contact seat 41 through the mounting circular hole. The conductive portion 426 of the moving contact 42 is in the shape of a straight strip; the first mounting portion 211 of the yoke 21 includes first and second side edges 2111, 2112 arranged at intervals and a horizontal edge 2113 located at the upper ends of the first and second side edges 2111, 2112, the horizontal edge 2113 and the first and second side edges 2111, 2112 form a U-shaped mounting area, the release coil is installed on the U-shaped mounting area, the lower end of the second side edge 2112 is integrally or fixedly arranged with the second mounting portion 212, the second side edge 2112 is straight, and the release coil is connected to the horizontal edge 2113 or the upper end of the second side edge 2112. By adopting the above scheme, when breaking the current, no matter what the current direction is, the repulsive force on the moving contact 42 moves in the repulsive direction, the current conducting length of the moving contact 42 is the longest, and the current channel on the yoke 21 is the longest, which is conducive to the repulsion of the moving contact 42. When the moving contact 42 is repelled, an arc is generated between the static contact and the moving contact 42. The force direction of the arc moves toward the arc striking part and the arc striking angle, so that the arc moves quickly under the action of the repulsive force, thereby increasing the arc transfer speed, reducing the ablation of the contacts, and improving the breaking capacity. Fig.19 .

[0078] In the embodiment of the present invention, an N-pole contact mechanism is also included, and the N-pole contact mechanism includes an N-pole static contact D1, an N-pole moving contact D2 and an N-pole arc-starting plate D3. An N-pole moving contact mounting column D413 is also provided on the moving contact seat 41 on the other side of the mounting column 413. The N-pole moving contact D2 is sleeved on the N-pole moving contact mounting column D413, and a second torsion spring D4 is provided between the two. A connecting column D5 is provided above the N-pole moving contact mounting column D413, and a convex edge D6 is provided around the connecting column D5. A torsion spring contact surface D61 and a torsion spring contact boss D62 are provided on the convex edge D6. A third torsion spring D7 is sleeved on the connecting column D5, and one end of the third torsion spring D7 contacts the torsion spring contact surface D61, and the other end contacts the card table of the shell. The purpose of the third torsion spring D7 is to generate a restoring force on the moving contact seat 41. The N-pole static contact D1 includes There are a wiring portion D11, a contact portion D12 and an arc-striking portion D13, a first wire E is connected to the end of the wiring portion D11, a second wire F is connected between the N-pole moving contact D2 and the N-pole arc-striking plate D3, and the N-pole power supply line G is also connected to the N-pole arc-striking plate D3. The wiring portion D11 of the N-pole static contact D1 is a straight strip, a card slot is provided on the housing 1, and the wiring portion D11 is placed in the card slot. The N-pole arc-striking plate D3 includes a straight side D31, a vertical side D32 and a beveled side D33, wherein the beveled side D33 is inclined to one side of the straight side D31, and an arc-striking area is formed between the beveled side D33 and the arc-striking portion D13 of the N-pole static contact D1, the N-pole power supply line G is connected to the end of the straight side D31, and the second wire F is connected to one end of the vertical side D32 close to the N-pole moving contact D2 or at the junction of the vertical side D32 and the beveled side D33. By adopting the above scheme, when the arc of the N pole is transferred from the N pole moving contact D2 to the N pole arc striking plate D3, a U-shaped current channel is formed between the N pole power supply line G and the N pole arc striking plate D3. According to the left-hand rule and the right-hand rule, no matter what the current direction is, the arc moves in the elongated direction, which is conducive to the extinguishing of the arc and improves the breaking capacity. Fig.21 and Fig. 22 .

[0079] In the embodiment of the present invention, the two sides of the moving contact seat 41 are integrally provided with mounting columns and N-pole mounting columns 413 and D413, the mounting columns 413 and the N-pole mounting columns D413 are located on the same axis, and the mounting columns 413 and the N-pole mounting columns D413 are provided with through holes that penetrate each other, and the base 14 is provided with a first boss 14E11, and the first boss 14E11 is integrally provided with a first shaft 14E12, and the periphery of the connecting portion between the first shaft 14E12 and the first boss 14E11 is provided with a first annular groove 14E 13, the N-pole mounting column D413 is sleeved on the first shaft 14E12, and the end of the N-pole mounting column D413 abuts against the first annular groove 14E13. The upper cover 15 is provided with a second boss 15E21, and the second boss 15E21 is integrally provided with a second shaft 15E22. The periphery of the connecting portion between the second shaft 15E22 and the second boss 15E21 is provided with a second annular groove 15E23. The mounting column 413 is sleeved on the second shaft 15E22, and the end of the mounting column 413 abuts against the second annular groove 15E23. By adopting the above scheme, the moving contact seat 41 can be conveniently installed on the base 14 and the upper cover 15. The above installation method has multiple insurance functions. No matter whether the cylindrical mounting column 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.

[0080] In the embodiment of the present invention, the width of the cross section of the first annular groove 14E13 is greater than the wall thickness of the N-pole mounting column D413, the width of the cross section of the second annular groove 15E23 is greater than the wall thickness of the mounting column 413, the length of the first shaft 14E12 is greater than the length of the second shaft 15E22, and after the movable contact seat 41 is installed on the base 14 and the upper cover 15, the first shaft 14E12 and the second shaft 15E22 abut against each other, and the abutting position is located in the mounting column 413. By adopting the above scheme, the above-mentioned mounting structure is more stable, and the abutting position is located in the mounting column 413, which is because there are relatively more parts arranged on the mounting column 413, so it is more stable.

[0081] In an embodiment of the present invention, a first buffer zone L and a second buffer zone M are respectively arranged on both sides of the vertical side D32 of the N-pole arc starting plate D3 on the middle seat 16. A notch D321 is arranged on the side of the vertical side D32 close to the base 14. An exhaust passage is formed between the notch D321 and the base 14. The exhaust passage communicates the first buffer zone L and the second buffer zone M. The first buffer zone L is arranged at the corresponding position of the area surrounded by the straight side D31, the vertical side D32 and the inclined side D33 of the arc starting plate D3. The bottom of the first buffer zone L is recessed inward. The straight side D31 and the vertical side D32 of the arc starting plate D3 are vertically arranged. Here, the vertical is not an absolute vertical and can also be inclined within a small range. By adopting the above scheme, the high-pressure gas in the arc starting area can pass through it, so that the first buffer zone L and the second buffer zone M can respectively enter the gas, greatly reducing the pressure in the arc starting area. In addition, the exhaust passage is arranged at the vertical side D32. The gas running from this position will not affect the installation of other components of the circuit breaker and will not cause other interferences, making the product structure simple and reasonable and reducing the product volume. An L-shaped first baffle 161 is arranged on the middle seat 16 and below and on one side of the arc starting area. A second baffle 146 inserted into the first baffle 161 is arranged on the base 14. The first baffle 161 and the second baffle 146 are inserted to form an arc isolation border. A first exhaust through hole L1 communicating with the outside is arranged on the side surface of the recessed part of the first buffer zone L. A second exhaust through hole M1 communicating with the outside is arranged on the side surface of the second buffer zone M. By adopting the above scheme, the arc isolation border can well prevent the arc and gas from running out through the gaps of the housing 1, but discharge according to the set exhaust through holes, buffer chambers and exhaust through hole positions, etc., thus greatly increasing the safety of the product. The first exhaust through hole L1 is arranged on the side surface of the recessed part of the first buffer zone L, so that the first exhaust through hole L1 is separated from the arc starting plate D3, and will not affect the installation of the arc starting plate D3 and the safety of the product.

Claims

1. A circuit breaker, comprising a housing, a tripping device, a handle device, a moving contact device, a locking device, a static contact, an arc extinguishing device and a bimetallic pull rod device, Characterized in that, The moving contact device includes a moving contact seat and a moving contact. A chute is provided at the upper end of the moving contact seat. The chute includes a bending part and a straight part. The first end of the connecting rod in the handle device is connected to the handle of the handle device, and the second end is placed in the chute. The locking device includes a locking spring mechanism and a lock. The lock is hinged to the moving contact seat. A pressing arm is provided at the upper end of the lock. After the circuit breaker is disconnected, the pressing arm cooperates with the bending part of the chute to lock the second end of the connecting rod. At this time, the handle can be pushed to close the circuit breaker. After the circuit breaker is closed, the tripping machine push rod acts on the lock to make the lock rotate, then the pressing arm loses the lock on the second end of the connecting rod. At this time, the second end of the connecting rod slides into the straight part of the chute and the moving contact seat rotates to disconnect the circuit breaker. The locking spring mechanism includes a bracket, a push rod and a spring. The bracket is fixed in the housing and is located on one side of the lock. A long groove is provided in the bracket. The push rod is placed in the long groove. One end of the spring abuts against the inner wall of the long groove, and the other end abuts against the first end of the push rod. The second end of the push rod protrudes from the long groove and is arranged corresponding to the side wall of the lock. After the circuit breaker is tripped, the end of the push rod abuts against the upper side wall of the lock. At this time, the second end of the connecting rod can be locked in the bending part of the chute to realize the closing operation of the circuit breaker. During the closing process of the circuit breaker, the thrust of the push rod on the lock gradually decreases or disappears.

2. The circuit breaker according to claim 1, Characterized in that: A dial arm is provided below the pressing arm of the lock. A fork is formed between the pressing arm and the dial arm. The bottom of the fork is U-shaped. The pressing arm and the dial arm are arranged in a staggered manner. The opening of the fork is larger than the diameter of the second end of the connecting rod. A notch is provided at the position of the moving contact seat where the chute is located. The pressing arm can be placed in the notch. A convex platform is provided below the chute of the moving contact seat. The dial arm can be placed on the outer side surface of the convex platform. Part of the upper side surface of the convex platform and the lower side surface of the bending part of the chute form a pressing surface. A limiting surface is also provided below the bending part. After the circuit breaker is tripped, the second end of the connecting rod is limited by the limiting surface and is located at the bottom of the bending part. At this time, the first end of the connecting rod connected to the handle is lower than the second end of the connecting rod placed in the bending part of the chute. During the closing process of the circuit breaker, the second end of the connecting rod abuts against the pressing surface. At the same time, the included angle between the thrust direction of the handle on the second end of the connecting rod and the supporting force direction of the pressing surface on the second end of the connecting rod is less than 180 degrees. After the circuit breaker is closed, the second end of the connecting rod is abutted by the pressing arm of the lock and is placed in the bending part and forms a pressing fit with the pressing surface. At this time, the push rod is separated from the upper side wall of the lock.

3. The circuit breaker according to claim 2, Characterized in that: An installation post is integrally provided on the moving contact seat. The latch and the moving contact are both movably sleeved on the installation post. An arc-shaped convex post is provided around the bottom of the installation post for one week, and a notch is formed between the arc-shaped convex posts. A circular through hole is provided on the latch, and the latch is sleeved on the arc-shaped convex post through the circular through hole. A convex rib is provided on the moving contact seat and located around the installation seat, and the inner side surface of the latch contacts the convex rib. The moving contact is sleeved on the installation post and its side surface abuts against or is close to the end of the arc-shaped convex post. A torsion spring seat is provided below the boss of the moving contact seat, a positioning block is provided on the moving contact seat below the spring seat, a bayonet is provided on the moving contact, a torsion spring is provided between the moving contact and the moving contact seat, and the torsion spring is also sleeved on the installation post. The first torsion arm of the torsion spring abuts against the torsion spring seat, the second torsion arm of the torsion spring abuts against the bayonet of the moving contact, and a positioning piece is provided on the moving contact between the torsion spring seat and the positioning block.

4. The circuit breaker according to claim 1 or 2, characterized in that: It further includes a power-taking mechanism for a test device. The power-taking mechanism for the test device includes a clamping block provided on the housing. A long groove is formed between the clamping blocks. A moving rod is provided in the long groove. The moving rod is placed between the handle and the yoke of the release. A pin shaft is provided on the housing, and a power-taking torsion spring is sleeved on the pin shaft. The first extension arm of the power-taking torsion spring abuts against the first end of the moving rod. The second end of the moving rod is correspondingly arranged with the moving contact seat. The rotation of the moving contact seat can drive the moving rod to move. A notch is provided on the upper side edge of the yoke of the release. The first extension arm of the power-taking torsion spring is located at the notch. After the circuit breaker trips, the moving contact seat pushes the moving rod to move and compresses the power-taking torsion spring so that the first extension arm of the power-taking torsion spring is separated from the yoke. After the circuit breaker closes, the moving contact seat releases the moving rod, and the moving rod moves under the elastic force of the power-taking torsion spring so that the first extension arm of the power-taking torsion spring contacts the inner wall at the notch of the yoke to achieve conduction.

5. The circuit breaker according to claim 3, characterized in that: It further includes a power-taking mechanism for a test device. The power-taking mechanism for the test device includes a clamping block provided on the housing. A long groove is formed between the clamping blocks. A moving rod is provided in the long groove. The moving rod is placed between the handle and the yoke of the release. A pin shaft is provided on the housing, and a power-taking torsion spring is sleeved on the pin shaft. The first extension arm of the power-taking torsion spring abuts against the first end of the moving rod. The second end of the moving rod is correspondingly arranged with the moving contact seat. The rotation of the moving contact seat can drive the moving rod to move. A notch is provided on the upper side edge of the yoke of the release. The first extension arm of the power-taking torsion spring is located at the notch. After the circuit breaker trips, the moving contact seat pushes the moving rod to move and compresses the power-taking torsion spring so that the first extension arm of the power-taking torsion spring is separated from the yoke. After the circuit breaker closes, the moving contact seat releases the moving rod, and the moving rod moves under the elastic force of the power-taking torsion spring so that the first extension arm of the power-taking torsion spring contacts the inner wall at the notch of the yoke to achieve conduction.

6. The circuit breaker according to claim 1 or 2, characterized in that: The double-metal pull rod device includes a pull rod and a bimetallic strip. A guiding groove is provided on the housing, and the pull rod is arranged in the guiding groove. The middle part of the pull rod is straight, and the two ends of the pull rod are provided with a first vertical rod and a second vertical rod. The first vertical rod cooperates with a latch, and the second vertical rod cooperates with the bimetallic strip. The bimetallic strip bends to pull the second vertical rod to realize the sliding of the pull rod. After the pull rod slides, the first vertical rod can pull the latch to realize the opening of the circuit breaker. A convex piece is provided on the latch. When the pull rod is placed in the guiding groove, the convex piece is arranged close to the surface of the middle part of the pull rod. A limiting groove is provided at the position corresponding to the end of the first vertical rod on the housing, and the end of the first vertical rod is placed in the limiting groove. A step is provided on one side of the first vertical rod, and a convex platform is provided on the housing to cooperate with it to prevent the pull rod from being displaced.

7. The circuit breaker according to claim 3, characterized in that: The double-metal pull rod device includes a pull rod and a bimetallic strip. A guiding groove is provided on the housing, and the pull rod is arranged in the guiding groove. The middle part of the pull rod is straight, and the two ends of the pull rod are provided with a first vertical rod and a second vertical rod. The first vertical rod cooperates with a latch, and the second vertical rod cooperates with the bimetallic strip. The bimetallic strip bends to pull the second vertical rod to realize the sliding of the pull rod. After the pull rod slides, the first vertical rod can pull the latch to realize the opening of the circuit breaker. A convex piece is provided on the latch. When the pull rod is placed in the guiding groove, the convex piece is arranged close to the surface of the middle part of the pull rod. A limiting groove is provided at the position corresponding to the end of the first vertical rod on the housing, and the end of the first vertical rod is placed in the limiting groove. A step is provided on one side of the first vertical rod, and a convex platform is provided on the housing to cooperate with it to prevent the pull rod from being displaced.

8. The circuit breaker according to claim 4, characterized in that: The double-metal pull rod device includes a pull rod and a bimetallic strip. A guiding groove is provided on the housing, and the pull rod is arranged in the guiding groove. The middle part of the pull rod is straight, and the two ends of the pull rod are provided with a first vertical rod and a second vertical rod. The first vertical rod cooperates with a latch, and the second vertical rod cooperates with the bimetallic strip. The bimetallic strip bends to pull the second vertical rod to realize the sliding of the pull rod. After the pull rod slides, the first vertical rod can pull the latch to realize the opening of the circuit breaker. A convex piece is provided on the latch. When the pull rod is placed in the guiding groove, the convex piece is arranged close to the surface of the middle part of the pull rod. A limiting groove is provided at the position corresponding to the end of the first vertical rod on the housing, and the end of the first vertical rod is placed in the limiting groove. A step is provided on one side of the first vertical rod, and a convex platform is provided on the housing to cooperate with it to prevent the pull rod from being displaced.

9. The circuit breaker according to claim 1 or 2, characterized in that: The housing includes an upper cover, a middle seat and a base. The bracket divides the corresponding space inside the housing into two parts. The space near the base side is the first space, and a button mechanism is arranged in the first space. The space near the upper cover side is the second space, and an indicator mechanism is arranged in the second space. The button mechanism includes a button and a return torsion spring. Through holes are arranged on the upper side surface of the base, and L-shaped bosses are arranged on the inner side of the base and on both sides of the through holes. The two L-shaped bosses are symmetrically arranged. The folded corner part of the L-shaped boss is close to the upper side surface of the base. The upper side of the L-shaped boss is integrated with the upper side surface of the base, and the side surface of the L-shaped boss is integrated with the inner side surface of the base. A guiding chute is arranged on the inner side surface of the base and between the L-shaped bosses. The button is arranged between the two L-shaped bosses, and its upper end can penetrate through the through hole. Convex edges are respectively arranged on the left and right sides of the button. After the button is reset, its convex edges are abutted against the inner side surface of the L-shaped boss. A convex block is arranged on the inner side of the button, and the convex block is placed in the guiding chute and forms a sliding fit with the guiding chute. A convex piece is arranged at the lower end of the button, and a card slot is arranged on the convex piece. The return torsion spring is sleeved on the mounting post of the base, and its movable arm abuts against the card slot on the convex piece of the button. The indicator mechanism includes a circuit board with an LED lamp and a light guide member. An opening is arranged on the upper side surface of the base and at the position of the second space. Part of the light guide member is placed on the opening. First and second positioning blocks are respectively arranged on the bracket and on both sides of the opening. The light guide member is arranged between the first and second positioning blocks. An extension part is arranged on one side of the second positioning block, and a pin shaft is arranged on the extension part. A first convex rib that abuts against the first positioning block is arranged on one side of the light guide member. An extension arm is arranged on the other side of the light guide member, and a groove is arranged on the lower side of the extension arm. The groove is mounted on the pin shaft. A positioning boss is arranged on the side of the light guide member close to the upper cover, and a positioning card slot that cooperates with the positioning boss is arranged on the upper cover. The positioning boss is placed in the positioning card slot.

10. The circuit breaker according to claim 9, characterized in that: It further includes a power-taking mechanism for the test device. The power-taking mechanism for the test device includes a clamping block arranged on the housing. A long groove is formed between the clamping blocks. A moving rod is arranged in the long groove. The moving rod is placed between the handle and the yoke of the release. A pin shaft is arranged on the housing. A power-taking torsion spring is sleeved on the pin shaft. The first extension arm of the power-taking torsion spring abuts against the first end of the moving rod. The second end of the moving rod is correspondingly arranged with the moving contact seat. The rotation of the moving contact seat can drive the movement of the moving rod. A notch is arranged on the upper side edge of the yoke of the release. The first extension arm of the power-taking torsion spring is located at the notch. After the circuit breaker trips, the moving contact seat pushes the moving rod to move and compress the power-taking torsion spring, so that the first extension arm of the power-taking torsion spring is separated from the yoke. After the circuit breaker closes, the moving contact seat releases the moving rod. The moving rod moves under the elastic force of the power-taking torsion spring, so that the first extension arm of the power-taking torsion spring contacts the inner wall at the notch of the yoke to achieve conduction. The bracket divides the corresponding space in the housing into two. The space close to the base side is the first space, and a button mechanism is arranged in the first space. The space close to the upper cover side is the second space, and an indicator light mechanism is arranged in the second space. The button mechanism includes a button. A through hole is arranged on the upper side surface of the base. L-shaped bosses are arranged on the inner side of the base and on both sides of the through hole. The two L-shaped bosses are symmetrically arranged. The folded corner part of the L-shaped boss is close to the upper side surface of the base. The upper side of the L-shaped boss is integrated with the upper side surface of the base. The side surface of the L-shaped boss is integrated with the inner side surface of the base. A guiding sliding groove is arranged on the inner side surface of the base and between the L-shaped bosses. The button is arranged between the two L-shaped bosses, and its upper end can pass through the through hole. Convex edges are respectively arranged on the left and right sides of the button. After the button is reset, its convex edges abut against the inner side surfaces of the L-shaped bosses. A convex block is arranged on the inner side of the button. The convex block is placed in the guiding sliding groove and forms a sliding fit with the guiding sliding groove. A convex piece is arranged at the lower end of the button. A clamping groove is arranged on the convex piece. The second extension arm of the power-taking torsion spring abuts against the clamping groove on the convex piece of the button. The indicator light mechanism includes a circuit board with an LED lamp and a light guide member. An opening is arranged on the upper side surface of the base and at the second space. Part of the light guide member is placed on the opening. First and second positioning blocks are respectively arranged on the bracket and on both sides of the opening. The light guide member is arranged between the first and second positioning blocks. An extension part is arranged on one side of the second positioning block. A pin shaft is arranged on the extension part. A first convex rib that abuts against the first positioning block is arranged on one side of the light guide member. An extension arm is arranged on the other side of the light guide member. A groove is arranged on the lower side of the extension arm. The groove is mounted on the pin shaft. A positioning convex platform is arranged on the side of the light guide member close to the upper cover. A positioning clamping groove that cooperates with the positioning convex platform is arranged on the upper cover. The positioning convex platform is placed in the positioning clamping groove.

11. The circuit breaker according to claim 1 or 2, characterized in that: The yoke of the release includes a first mounting portion, a second mounting portion, and an arcing portion. The coil device of the release is mounted on the first mounting portion. Contacts are provided on the second mounting portion to form a stationary contact. The arcing portion is bent and disposed below the second mounting portion. The coil in the coil device of the release is connected to the upper side of the first mounting portion of the yoke. The moving contact includes a mounting portion, a conductive portion, a contact portion, and an arcing angle. The moving contact is connected to the moving contact seat through the mounting portion. The connecting wire of the circuit breaker is connected to the upper end of the conductive portion of the moving contact or the mounting portion. A mounting round hole is provided on the mounting portion of the moving contact. The moving contact is connected and hinged to the moving contact seat through the mounting round hole. The conductive portion of the moving contact is straight. The first mounting portion of the yoke includes a first side and a second side spaced apart from each other and a cross side located at the upper ends of the first side and the second side. The cross side and the first side and the second side form a U-shaped mounting area. The release coil is mounted on the U-shaped mounting area. The lower end of the second side is integrally or fixedly provided with the second mounting portion. The second side is straight. The coil of the release is connected to the cross side or the upper end portion of the second side.

12. The circuit breaker according to claim 3, characterized in that: The yoke of the release includes a first mounting portion, a second mounting portion, and an arcing portion. The coil device of the release is mounted on the first mounting portion. Contacts are provided on the second mounting portion to form a stationary contact. The arcing portion is bent and disposed below the second mounting portion. The coil in the coil device of the release is connected to the upper side of the first mounting portion of the yoke. The moving contact includes a mounting portion, a conductive portion, a contact portion, and an arcing angle. The moving contact is connected to the moving contact seat through the mounting portion. The connecting wire of the circuit breaker is connected to the upper end of the conductive portion of the moving contact or the mounting portion. A mounting round hole is provided on the mounting portion of the moving contact. The moving contact is connected and hinged to the moving contact seat through the mounting round hole. The conductive portion of the moving contact is straight. The first mounting portion of the yoke includes a first side and a second side spaced apart from each other and a cross side located at the upper ends of the first side and the second side. The cross side and the first side and the second side form a U-shaped mounting area. The release coil is mounted on the U-shaped mounting area. The lower end of the second side is integrally or fixedly provided with the second mounting portion. The second side is straight. The coil of the release is connected to the cross side or the upper end portion of the second side.

13. The circuit breaker according to claim 11, characterized in that: It further includes an N - pole contact mechanism, which comprises an N - pole static contact, an N - pole moving contact and an N - pole arc - guiding plate. On the other side of the mounting post on the moving contact seat, there is also an N - pole moving contact mounting post. The N - pole moving contact is sleeved on the N - pole moving contact mounting post, and a second torsion spring is arranged between them. Above the N - pole moving contact mounting post, there is a connecting post. There are convex edges around the connecting post. On the convex edges, there are a torsion - spring contact surface and a torsion - spring contact boss. A third torsion spring is sleeved on the connecting post. One end of the third torsion spring abuts against the torsion - spring contact surface, and the other end abuts against the clamping platform of the housing. The N - pole static contact includes a wiring part, a contact part and an arc - guiding part. A first wire is connected to the end of the wiring part. A second wire is connected between the N - pole moving contact and the N - pole arc - guiding plate. An N - pole power supply incoming line is also connected to the N - pole arc - guiding plate. The wiring part of the N - pole static contact is straight - shaped. There is a card slot on the housing, and the wiring part is placed in the card slot. The N - pole arc - guiding plate includes a straight edge, a vertical edge and an inclined edge. The inclined edge is inclined towards the straight - edge side, and an arc - guiding area is formed between the inclined edge and the arc - guiding part of the N - pole static contact. The N - pole power supply incoming line is connected to the end of the straight edge. The second wire is connected to one end of the vertical edge close to the moving contact or the connection part of the vertical edge and the inclined edge.

14. The circuit breaker according to claim 12, characterized in that: It further includes an N - pole contact mechanism, which comprises an N - pole static contact, an N - pole moving contact and an N - pole arc - guiding plate. On the other side of the mounting post on the moving contact seat, there is also an N - pole moving contact mounting post. The N - pole moving contact is sleeved on the N - pole moving contact mounting post, and a second torsion spring is arranged between them. Above the N - pole moving contact mounting post, there is a connecting post. There are convex edges around the connecting post. On the convex edges, there are a torsion - spring contact surface and a torsion - spring contact boss. A third torsion spring is sleeved on the connecting post. One end of the third torsion spring abuts against the torsion - spring contact surface, and the other end abuts against the clamping platform of the housing. The N - pole static contact includes a wiring part, a contact part and an arc - guiding part. A first wire is connected to the end of the wiring part. A second wire is connected between the N - pole moving contact and the N - pole arc - guiding plate. An N - pole power supply incoming line is also connected to the N - pole arc - guiding plate. The wiring part of the N - pole static contact is straight - shaped. There is a card slot on the housing, and the wiring part is placed in the card slot. The N - pole arc - guiding plate includes a straight edge, a vertical edge and an inclined edge. The inclined edge is inclined towards the straight - edge side, and an arc - guiding area is formed between the inclined edge and the arc - guiding part of the N - pole static contact. The N - pole power supply incoming line is connected to the end of the straight edge. The second wire is connected to one end of the vertical edge close to the moving contact or the connection part of the vertical edge and the inclined edge.

15. The circuit breaker according to claim 1 or 2, characterized in that: The housing includes an upper cover, a middle seat and a base. On both sides of the moving contact seat, there are integrally provided mounting posts and N-pole mounting posts. The mounting posts and the N-pole mounting posts are located on the same axis, and through holes communicating with each other are provided on the mounting posts and the N-pole mounting posts. A first boss is provided on the base, and a first shaft is integrally provided on the first boss. A first annular groove is provided around the connecting portion of the first shaft and the first boss. After the N-pole mounting post is sleeved on the first shaft, the end of the N-pole mounting post abuts against the first annular groove. A second boss is provided on the upper cover, and a second shaft is integrally provided on the second boss. A second annular groove is provided around the connecting portion of the second shaft and the second boss. After the mounting post is sleeved on the second shaft, the end of the mounting post abuts against the second annular groove. The width of the cross-section of the first annular groove is greater than the wall thickness of the N-pole mounting post, and the width of the cross-section of the second annular groove is greater than the wall thickness of the mounting post. The length of the first shaft is greater than the length of the second shaft. After the moving contact seat is installed on the base and the upper cover, the first shaft and the second shaft abut against each other, and the abutting position is located inside the mounting post.

16. The circuit breaker according to claim 12, characterized in that: The housing includes an upper cover, a middle seat and a base. On both sides of the moving contact seat, there are integrally provided mounting posts and N-pole mounting posts. The mounting posts and the N-pole mounting posts are located on the same axis, and through holes communicating with each other are provided on the mounting posts and the N-pole mounting posts. A first boss is provided on the base, and a first shaft is integrally provided on the first boss. A first annular groove is provided around the connecting portion of the first shaft and the first boss. After the N-pole mounting post is sleeved on the first shaft, the end of the N-pole mounting post abuts against the first annular groove. A second boss is provided on the upper cover, and a second shaft is integrally provided on the second boss. A second annular groove is provided around the connecting portion of the second shaft and the second boss. After the mounting post is sleeved on the second shaft, the end of the mounting post abuts against the second annular groove. The width of the cross-section of the first annular groove is greater than the wall thickness of the N-pole mounting post, and the width of the cross-section of the second annular groove is greater than the wall thickness of the mounting post. The length of the first shaft is greater than the length of the second shaft. After the moving contact seat is installed on the base and the upper cover, the first shaft and the second shaft abut against each other, and the abutting position is located inside the mounting post.

17. The circuit breaker according to claim 13, characterized in that: The housing includes an upper cover, a middle seat and a base. On both sides of the vertical side of the N-pole arc guide plate on the middle seat, a first buffer zone and a second buffer zone are respectively provided. A notch is provided on the side of the vertical side close to the base, and an exhaust passage is formed between the notch and the base. The exhaust passage communicates the first buffer zone and the second buffer zone. The first buffer zone is provided at the corresponding position of the area enclosed by the straight side, the vertical side and the inclined side of the arc guide plate. The bottom of the first buffer zone is recessed inward. The straight side and the vertical side of the arc guide plate are perpendicular to each other.

18. The circuit breaker according to claim 17, characterized in that: An L-shaped first baffle is arranged on the middle seat and below and on one side of the arc extinguishing area. A second baffle is arranged on the base and is inserted into the first baffle in an inserting manner. The first baffle and the second baffle are inserted into each other to form an arc isolation border. A first exhaust through hole communicating with the outside is arranged on the side surface of the recessed part of the first buffer area. A second exhaust through hole communicating with the outside is arranged on the side surface of the second buffer area.

19. The circuit breaker according to claim 14, characterized in that: the housing includes an upper cover, a middle seat and a base. A first buffer area and a second buffer area are respectively arranged on both sides of the vertical side of the N-pole arc ignition plate on the middle seat. A notch is arranged on the side of the vertical side close to the base, and an exhaust passage is formed between the notch and the base. The exhaust passage communicates the first buffer area and the second buffer area. The first buffer area is arranged at the corresponding position of the area surrounded by the straight side, the vertical side and the inclined side of the arc ignition plate. The bottom of the first buffer area is recessed inward. The straight side and the vertical side of the arc ignition plate are perpendicularly arranged.

20. The circuit breaker according to claim 19, characterized in that: An L-shaped first baffle is arranged on the middle seat and below and on one side of the arc extinguishing area. A second baffle is arranged on the base and is inserted into the first baffle in an inserting manner. The first baffle and the second baffle are inserted into each other to form an arc isolation border. A first exhaust through hole communicating with the outside is arranged on the side surface of the recessed part of the first buffer area. A second exhaust through hole communicating with the outside is arranged on the side surface of the second buffer area.

Images