A circuit breaker

Abstract

The utility model relates to a circuit breaker, including a base, a partition, an upper cover, an operating mechanism, an electromagnetic system and a leakage tripping mechanism, wherein the leakage tripping mechanism includes a leakage tripping device, the operating mechanism includes a handle, an L-pole contact seat, an L-pole moving contact arranged on the L-pole contact seat, an N-pole contact seat, an N-pole moving contact arranged on the N-pole contact seat, a lock and a tripping lock, in a closed state, a tripping rod extends out of an installation space, and when tripping, the lock rotates the tripping rod under the action of the electromagnetic system to retract the installation space, and the leakage tripping mechanism also includes a pull rod, the pull rod includes a fixed arm, a swing arm and a leakage pushing arm that are integrally formed or fixedly connected, and the fixed arm is connected to the lock. By adopting the above technical solution, the utility model provides a circuit breaker with a reasonable structural layout, flexible and smooth lock action, fast tripping speed, and a simple transmission structure between the leakage tripping device and the lock, good stability, and fast transmission.

Description

Technical Field

[0001] The utility model relates to a circuit breaker. Background Art

[0002] The circuit breaker consists of a casing, a handle, an operating mechanism, a contact system, a zero-sequence current transformer, a leakage tripping mechanism and an arc extinguishing system.

[0003] The operating mechanism includes a contact mounting seat, an L-pole moving contact and an N-pole moving contact. Mounting columns are provided on both sides of the contact mounting seat and located on the same axis. The L-pole moving contact and the N-pole moving contact are respectively movably arranged on the mounting columns on both sides of the contact mounting seat. The lock and the jumper are located between the L-pole moving contact and the N-pole moving contact. The leakage tripping mechanism includes a leakage tripper and a linkage unit, wherein the leakage tripper includes a coil, a coil frame, a yoke, and an iron core. The coil is wound on the coil frame, and the iron core is inserted into the coil frame. A push rod is provided at one end of the iron core, and an opening for the push rod to enter and exit is provided on the coil frame. When leakage occurs, the iron core drives the lock of the circuit breaker to swing through the linkage unit to achieve tripping.

[0004] The operating mechanism structure in the above-mentioned circuit breaker is unreasonable, and problems such as jamming and lag are prone to occur during tripping, resulting in slow tripping speed, inflexible lock action, adhesion or increased friction between the lock and the contact mounting seat, and other problems. At the same time, the arc and particles generated in the circuit breaker are easy to run into the L-pole moving contact and the N-pole moving contact, causing the lock and the tripping buckle to blacken and affect the action. In addition, the installation of the N-pole moving contact and the L-pole moving contact is unreasonable, the transmission performance of the linkage unit is unstable, and the installation is inconvenient. In addition, the structure between the existing leakage releaser and the linkage unit is complicated. Summary of the invention

[0005] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a circuit breaker with reasonable structural layout, flexible and smooth locking action, fast tripping speed, and a simple transmission structure between the leakage release and the lock, good stability and fast transmission.

[0006] The technical solution of the utility model: a circuit breaker includes a base, a partition, an upper cover, an operating mechanism, an electromagnetic system and a leakage tripping mechanism, wherein the partition is located between the base and the upper cover, the leakage tripping mechanism includes a leakage tripping device, the operating mechanism includes a handle, an L-pole contact seat, an L-pole moving contact arranged on the L-pole contact seat, an N-pole contact seat, an N-pole moving contact arranged on the N-pole contact seat, a lock and a tripping button, the handle is connected to the tripping button through a connecting rod, the L-pole contact seat and the N-pole contact seat are respectively The L-pole contact seat is arranged on both sides of the partition, and the L-pole contact seat is connected to the N-pole contact seat through a connecting column to form an installation space. The lock buckle and the jump buckle are rotatably arranged in the installation space, and the jump buckle is rotatably sleeved on the connecting column. The N-pole contact seat is provided with a first boss, a second boss and a third boss on the side facing the L-pole contact seat. The second boss is located on the left side of the first boss and is spaced apart from the first boss. The middle part of the lock buckle is installed between the first boss and the second boss through a pin shaft. The upper end of the lock buckle is provided with a stopper that cooperates with the jump buckle to limit the jump. The locking buckle is provided with a tripping rod, and the tripping rod is located below the second and fourth bosses. When the switch is closed, the tripping rod extends out of the installation space and is located on one side of the electromagnetic system. When the lock is released, the tripping rod is provided on the locking buckle, and the tripping rod is located below the second and fourth bosses. When the lock is closed, the tripping rod extends out of the installation space and is located on one side of the electromagnetic system. When the lock is released, The lock rotates the trip rod to retract the installation space under the action of the electromagnetic system. The leakage trip mechanism also includes a pull rod, which includes a fixed arm, a swing arm and a leakage push arm that are integrally formed or fixedly connected. The fixed arm is connected to the lock. The lock is provided with an activity space. The swing arm moves in the activity space. The leakage push arm is arranged corresponding to the position of the top rod of the leakage releaser. When the leakage push arm swings upward under the drive of the top rod of the leakage releaser, the swing arm drives the lock to swing to achieve tripping.

[0007] By adopting the above technical scheme, the structural layout is reasonable, the installation is convenient, the operating mechanism operates stably, the lock can move flexibly between the two contact seats, and the release is rapid. The position setting of each boss will not affect the movement of the lock, and the lock can move flexibly between the two contact seats, and the movement is smooth and unobstructed. The L-pole contact seat and the N-pole contact seat are provided with long grooves, and the pin shaft is passed through the long grooves. When the circuit breaker is in the closed state, the leakage releaser or the electromagnetic system acts on the lock to rotate the lock, and the lock is separated from the tripping buckle to achieve release. The transmission structure is simple, the transmission is convenient and fast, and rapid release can be achieved.

[0008] Further configuration of the utility model: the electromagnetic system includes a moving iron core and a push rod that slides synchronously with the moving iron core, a sixth boss is provided on the N-pole contact seat below the second boss, a seventh boss is provided on the L-pole contact seat below the fourth boss, the sixth boss is separated from the seventh boss, the trip rod is located between the sixth boss and the seventh boss, the sixth boss and the outer side surface of the second boss are integrally formed to form a first arc surface, the seventh boss and the outer side surface of the fourth boss are integrally formed to form a second arc surface, and when the trip rod is retracted, the end of the push rod is arranged to abut against the two arc surfaces.

[0009] With the above further arrangement, the second boss protrudes from the sixth boss, and the fourth boss protrudes from the seventh boss. When the second boss conflicts with the fourth boss, the sixth boss is separated from the fourth boss, and the push rod is between the sixth boss and the seventh boss. When leakage tripping occurs, the movement of the moving iron core drives the movement of the push rod, and the push rod pushes the trip rod to retract it. The push rod continues to move, conflicts with the arc surface, and continues to push the contact seat to rotate to achieve tripping. The tripping can be completed quickly and without connection. At the same time, the end of the push rod conflicts with the arc surface, which can effectively block the arc from entering the activity space from the gap between the sixth boss and the seventh boss to affect the locking and tripping.

[0010] The utility model is further configured as follows: a placement hole and a toggle boss are provided in the activity space, the fixed arm is inserted in the placement hole, and when the leakage current pushing arm swings upward under the drive of the top rod, the swing arm contacts the toggle boss to drive the lock to swing.

[0011] By further adopting the above-mentioned setting, the range of movement of the pull rod is limited so that the swing arm can only move within the activity space. The pull rod will not affect the movement of other parts when swinging. The swing arm contacts the toggle boss to drive the lock to swing and achieve disengagement.

[0012] The utility model is further configured as follows: the pull rod also includes a bimetallic push arm, the bimetallic push arm is located between the swing arm and the leakage push arm, a bimetallic strip is provided on the base, the bimetallic strip is located on one side of the bimetallic push arm, and when the bimetallic strip heats up and bends, the bimetallic push arm is driven to swing, so as to drive the lock to swing and realize release.

[0013] By adopting the above-mentioned further setting, when the line is overloaded, the bimetallic strip is deformed by heat, contacts the bimetallic push arm, and pushes the bimetallic push arm to swing, driving the lock to swing and achieve tripping, thereby cutting off the circuit. The bimetallic push arm is set in a "U" shape, one end is connected to the swing arm through a connecting arm, and the other end is connected to the leakage push arm. The bimetallic push arm is set vertically, and the connecting arm is parallel to the leakage push arm. The structural layout is reasonable, and does not affect the leakage releaser and the swing of the bimetallic strip drive rod.

[0014] The utility model is further configured as follows: it also includes a power-taking mechanism and a baffle, the baffle is located between the base and the upper cover, the power-taking mechanism includes a button and a torsion spring, the torsion spring includes a first extension arm and a second extension arm, the first extension arm is located below the button, a main circuit board is provided on the base, and the second extension arm is in contact with the main circuit board, the electromagnetic system also includes a yoke, a static contact is provided on the yoke, a spring sheet is provided on the baffle, and the spring sheet is located below the first extension arm, when the switch is closed, the L-pole contact seat rotates to drive the L-pole moving contact to move, and the two ends of the L-pole moving contact are in contact with the static contact and the spring sheet respectively, under the action of the button, the first extension arm is in contact with the spring sheet, and the circuit is turned on, and when the switch is opened, the two ends of the L-pole moving contact are separated from the spring sheet and the static contact respectively, and the circuit is disconnected.

[0015] With the above further arrangement, after closing the circuit, the moving contact contacts the static contact and the spring sheet. At this time, the button is pressed, and the first extension arm of the torsion spring contacts the spring sheet after the button is pressed down, and the second extension arm contacts the main circuit board. The circuit is turned on and power can be taken. After opening the circuit, the moving contact is disconnected from the static contact and the spring sheet and is not in contact. At this time, there will be no electricity when the button is pressed, thereby protecting the circuit breaker. No matter how the circuit breaker is connected, the circuit board will always have no electricity after the circuit breaker is disconnected, thereby increasing the service life of the circuit board.

[0016] The utility model is further configured as follows: a first slot is provided on the baffle plate, a second slot communicated with the first slot is provided on the base, a spring sheet is inserted into the first slot and the second slot, an elastic clamping foot is provided on the spring sheet, a limiting slot is provided on one side of the baffle plate close to the base, and the elastic clamping foot is clamped in the limiting slot.

[0017] By adopting the above-mentioned further configuration, the spring sheet structure is stabilized, the shell limits the front and rear of the spring sheet, and the slot limits the upper and lower positions of the spring sheet, thereby preventing the spring sheet from detaching from the baffle.

[0018] The utility model is further configured as follows: a first placement groove and a second placement groove communicated with the first placement groove are provided on the L-pole contact seat, the L-pole moving contact is installed in the first placement groove, a contact piece is provided in the second placement groove, a wire is connected between the contact piece and the L-pole moving contact, a connecting hook is integrally formed at the upper end of the contact piece, the connecting hook part extends outside the second placement groove, and the part outside the second placement groove is arranged in an arc shape, and when the switch is closed, the connecting hook contacts the spring piece.

[0019] With the above further configuration, the contact piece is connected to the moving contact through a wire, and the two ends of the wire are respectively welded to the contact piece and the moving contact, which has good conductivity and is convenient for driving the contact piece to move when the moving contact moves. When the switch is closed, the moving contact contacts the yoke, and the contact piece contacts the spring piece to achieve circuit conduction. The setting of the connecting hook makes the contact piece structure stable, and the contact part with the spring piece is arranged in an arc shape, so that no friction is generated between the arc part and the spring piece, and it will not get stuck or deformed.

[0020] The utility model is further configured as follows: a first extension platform and a second extension platform are respectively provided on both side surfaces of the partition, and a third boss and a fifth boss are obliquely arranged on the corresponding contact seats. In the open state, a first gap is formed between the end of the third boss and the first extension platform, and a second gap is formed between the end of the fifth boss and the second extension platform.

[0021] By further adopting the above-mentioned setting, the inclined setting will not be hindered when the contact seat rotates, and the rotation is smooth. When the contact seat moves, the side walls of the third boss and the fifth boss are always in conflict with the partition. The first gap and the second gap are small, and the generated arc will be cut into small arcs even if it enters from the gap, thereby not affecting the locking and tripping between the two contact seats.

[0022] The utility model is further configured as follows: an indicating device is provided on the base, the indicating device includes a light guide, an indicator light and an indicator light circuit board, an indicating window is provided on the base, the light guide part is partially located in the indicating window, the indicator light is arranged on the indicator light circuit board, the indicator light circuit board is connected to the main circuit board, a positioning member is provided in the base, the positioning member includes a vertically arranged positioning plate and two positioning bosses and a positioning piece arranged laterally on the positioning plate, the two positioning bosses are arranged to be separated to form a light guide channel, the light guide is located on the two positioning bosses, the positioning piece is located below the two positioning bosses, and a placement area is formed between the positioning piece and the two positioning bosses, the indicator light circuit board is located in the placement area, and the indicator light corresponds to the light guide channel.

[0023] With the above-mentioned further arrangement, the light guide and the indicator light circuit board are positioned by the positioning member, so that the structure of the light guide and the indicator light circuit board is stable. When the light guide is pressed under the action of external force, it will not slide into the shell. The positioning plate, the positioning boss and the positioning sheet form a U shape and cooperate with the inner wall of the base to position the indicator light circuit board and improve its stability. The light of the indicator light is transmitted from the light guide channel and out of the shell through the light guide. The setting of the positioning member can position the light guide and the indicator light circuit board without hindering the transmission of light.

[0024] The utility model is further configured as follows: an indicating device installation area, a main circuit board installation area, and an operating mechanism installation area are provided on the base; a wiring groove for installing wires is provided in the operating mechanism installation area; the indicating device installation area and the main circuit board installation area are connected via the wiring groove; a wire pressing piece and the baffle are provided at a position corresponding to the operating mechanism installation area on the base; the wires are pressed into the wiring groove via the baffle and the wire pressing piece.

[0025] With the above further configuration, the wires are isolated from the handle and the contact seat by means of a baffle and a wire pressing piece. When the handle or the contact seat is in operation, the wires are not worn and are protected. The baffle and the wire pressing piece are both made of insulating materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the overall structural diagram of the circuit breaker;

[0027] Figure 2 This is a schematic diagram of the internal structure of the circuit breaker when it is closed;

[0028] Figure 3 This is a schematic diagram of the internal structure of the circuit breaker when it is open;

[0029] Figure 4 is a schematic diagram of the operating mechanism;

[0030] Figure 5 It is a schematic diagram of the L-pole contact seat, the jumper and the lock;

[0031] Figure 6 It is a schematic diagram of the N-pole contact seat, the jumper and the lock;

[0032] Figure 7 It is a schematic diagram of the N-pole contact seat and the N-pole moving contact;

[0033] Figure 8 It is a schematic diagram of the L-pole contact seat and the L-pole moving contact;

[0034] Fig. 9 It is a schematic diagram of the side where the L-pole contact seat faces the N-pole contact seat;

[0035] Fig.10 It is a schematic diagram of the L-pole contact seat;

[0036] Fig.11 is a schematic diagram of a lock;

[0037] Fig.12 is a schematic diagram of the pull rod;

[0038] Fig.13 is a schematic diagram of a spring sheet;

[0039] Fig.14 The figure is a schematic diagram of the installation of the spring sheet and the baffle;

[0040] Fig.15 is a schematic diagram of a baffle;

[0041] Fig.16 is a schematic diagram of a baffle;

[0042] Fig.17 It is a schematic diagram of the connection between the L-pole moving contact and the contact piece;

[0043] Fig.18 A schematic diagram of the indicating mechanism;

[0044] Fig.19 is a schematic diagram of a positioning member;

[0045] Fig. 20 It is a schematic diagram of an indicator light and a light guide;

[0046] Fig.21 is a schematic diagram of the position of the torsion spring;

[0047] Fig. 22 This is a schematic diagram of the installation of the tension spring;

[0048] Fig.23 It is a schematic diagram of the leakage tripping mechanism;

[0049] Fig.24 is a schematic diagram of the coil skeleton;

[0050] Fig.25 It is a schematic diagram of the iron core and the top rod in the leakage tripping mechanism;

[0051] Fig.26 It is a schematic diagram of the partition and the L-pole contact seat;

[0052] Fig. 27 It is a schematic diagram of the partition and the N-pole contact seat;

[0053] Fig.28 A schematic diagram of the base.

[0054] 1. Base; 11. Bimetallic strip; 12. Active slot; 13. Second slot; 14. Indicator window; 15. Positioning piece; 151. Positioning plate; 152. Positioning boss; 153. Positioning piece; 154. Placement area; 16. Mounting shaft; 161. First tension spring; 162. Second tension spring; 17. Indicator device installation area; 18. Main circuit board installation area; 19. Operating mechanism installation area; 191. Wire routing groove; 10. Wire pressing piece; 2. Partition; 21. First extension platform; 22. Second extension platform; 23. First gap; 24. Second gap; 3. Upper cover; A, operating mechanism; A1, handle; A2, L-pole contact seat; A21, fourth boss; A22, fifth boss; A23, seventh boss; A25, first placement groove; A26, second placement groove; A261, convex block, A3, L-pole moving contact; A4, N-pole contact seat; A41, first boss; A411, first lock spring placement groove; A42, second boss; A43, third boss; A44, sixth boss; A5, N-pole moving contact; A6, lock; A61, occlusal surface; A62, lock spring; A63, second lock spring placement groove; A64, trip rod; A65, activity space; A651, placement hole; A652, toggle boss; A7, jumper; A8, connecting rod; A9, connecting column; B, electromagnetic system; B1, push rod; B2, yoke; C, leakage tripping mechanism; C1, leakage tripper; C11, iron core; C12, push rod; C2, pull rod; C21, fixed arm; C22, swing arm; C23, leakage push arm; C24, double gold push arm; C25, connecting arm; C4, coil frame; C41, guide groove; C42, installation groove; D, power supply mechanism; D1, button; D2 torsion spring; D21, first extension arm; D22, second extension arm; E, indicating device; E10, light guide; E11, indicator light; E12, indicator light circuit board; F, main circuit board; 4, installation space; 5, first arc surface; 6, second arc surface; 7, baffle; 71, spring sheet; 711, elastic foot; 72, first slot; 73, socket; 74, limit groove; 8, contact sheet; 81, connecting hook; 9, wire; 20, baffle. DETAILED DESCRIPTION

[0055] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0056] It should be noted that in the description of the present utility model, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0057] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0058] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that technical personnel in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] like Figure 1-28As shown, a circuit breaker includes a base 1, a partition 2, an upper cover 3, an operating mechanism A, an electromagnetic system B and a leakage tripping mechanism C, wherein the partition 2 is located between the base 1 and the upper cover 3, and an arc extinguishing chamber is provided between the upper cover 3 and the partition 2. The arc extinguishing chamber belongs to the prior art, so it is not described in detail. The leakage tripping mechanism C includes a leakage tripper C1, and the operating mechanism A includes a handle A1, an L-pole contact seat A2, an L-pole moving contact A3 arranged on the L-pole contact seat A2, an N-pole contact seat A4, an N-pole moving contact A5 arranged on the N-pole contact seat A4, a lock A6 and a tripping catch A7. The handle A1 is connected to the tripping catch A6 through a connecting rod, and the L-pole contact seat A2 and the N-pole contact seat A4 are respectively arranged on both sides of the partition 2, and The L-pole contact seat A2 is connected to the N-pole contact seat A4 through a connecting column A9 to form an installation space 4. The lock buckle A6 and the jump buckle A7 are rotatably arranged in the installation space 4, and the jump buckle A7 is rotatably sleeved on the connecting column A9. The N-pole contact seat A4 is provided with a first boss A41, a second boss A42 and a third boss A43 on the side facing the L-pole contact seat A2. The second boss A42 is located on the left side of the first boss A41 and is spaced apart from the first boss A41. The middle part of the lock buckle A6 is installed between the first boss A41 and the second boss A42 through a pin shaft. The upper end of the lock buckle A6 is provided with a bite surface A61 that contacts and cooperates with the jump buckle A7 to limit the rotation of the jump buckle. A lock buckle spring A62 is provided between the lock buckle A6 and the N-pole contact seat A4. , a first lock spring placement groove A411 is provided on the lower end surface of the first boss A41, a second lock spring placement groove A63 is provided on the lock A6, and both ends of the lock spring A6 are respectively located in the corresponding lock spring placement grooves, and a fourth boss A21 and a fifth boss A22 are correspondingly provided on the side of the L-pole contact seat A2 facing the N-pole contact seat A4. When the L-pole contact seat A2 is connected to the N-pole contact seat A4, the first boss A41 abuts against the L-pole contact seat A2, the second boss A42 abuts against the fourth boss A21, the third boss A43 and the fifth boss A22 are located on both sides of the partition 2 and are set to abut against the partition 2, and a trip rod A64 is provided on the lock A6, and the trip rod A64 is located between the second boss A42 and the first boss A41. Below the four bosses A21, in the closed state, the tripping rod A64 extends out of the installation space 4 and is located on one side of the electromagnetic system B. When tripping, the lock A6 rotates the tripping rod A64 under the action of the electromagnetic system B to retract into the installation space 4. The leakage tripping mechanism C also includes a pull rod C2, and the pull rod C2 includes an integrally formed or fixedly connected fixed arm C21, a swing arm C22 and a leakage push arm C23. The fixed arm C21 is connected to the lock A6, and an activity space A65 is provided on the lock A6. The swing arm C22 moves in the activity space A65. The leakage push arm C23 is set corresponding to the top rod position of the leakage release C1. When the leakage push arm C23 swings upward under the drive of the top rod of the leakage release,The swing arm C22 drives the lock A6 to swing to achieve tripping. The structure layout is reasonable and the installation is convenient. The operating mechanism A has stable action. The lock A6 can move flexibly between the two contact seats and trip quickly. The position setting of each boss will not affect the movement of the lock. It can move flexibly between the two contact seats, and the movement is smooth and unobstructed. Long grooves are provided on the L-pole contact seat A2 and the N-pole contact seat A4, and the pin shaft is passed through the long grooves. When the circuit breaker is in the closed state, if leakage occurs, the leakage releaser or the electromagnetic system acts on the lock to rotate the lock, and separate from the tripping buckle to achieve tripping. The transmission structure is simple, the transmission is convenient and fast, and rapid tripping can be achieved. The pull rod C2 also includes a bimetal push arm C24, which is located between the swing arm C22 and the leakage push arm C23. The base 1 is provided with a bimetallic strip 11, which is located on one side of the bimetallic strip 11 and drives the bimetallic strip C24 to swing when the bimetallic strip 11 heats up and bends, so as to drive the lock A6 to swing and achieve tripping. When the line is overloaded, the bimetallic strip 11 is deformed by heat, contacts the bimetallic strip C24, and pushes the bimetallic strip C24 to swing, driving the lock A6 to swing and achieve tripping, thereby cutting off the circuit. The bimetallic strip C24 is set in a "U" shape, one end is connected to the swing arm C22 through the connecting arm C25, and the other end is connected to the leakage push arm C23. The bimetallic strip C24 is set vertically, and the connecting arm C25 is parallel to the leakage push arm C23. The structural layout is reasonable, and does not affect the leakage release C1 and the bimetallic strip 11 driving the pull rod to swing.

[0060] The electromagnetic system B includes a moving iron core and a push rod B1 that slides synchronously with the moving iron core. A sixth boss A44 is provided on the N-pole contact seat A4 below the second boss A42. A seventh boss A23 is provided on the L-pole contact seat A2 below the fourth boss A21. The sixth boss A44 is separated from the seventh boss A23. The trip rod A64 is located between the sixth boss A44 and the seventh boss A23. The sixth boss A44 and the outer side surface of the second boss A43 are integrally formed to form a first arc surface 5. The seventh boss A23 and the outer side surface of the fourth boss A21 are integrally formed to form a second arc surface 6. When the trip rod A64 is retracted, the end of the push rod is in contact with the two arc surfaces. The second boss A42 It protrudes from the sixth boss A44, and the fourth boss A21 protrudes from the seventh boss A23. When the second boss A42 conflicts with the fourth boss A21, the sixth boss A44 is separated from the fourth boss A21, and the push rod is between the sixth boss A44 and the seventh boss A23. When leakage tripping occurs, the movement of the moving iron core drives the push rod B1 to move, and the push rod B1 pushes the trip rod A64 to retract it. The push rod B1 continues to move and conflicts with the arc surface, and continues to push the contact seat to rotate to achieve tripping. The tripping can be completed quickly without connection. At the same time, the end of the push rod conflicts with the arc surface, which can effectively block the arc from entering the installation space 4 from the gap between the sixth boss A44 and the seventh boss A23 to affect the lock buckle A6 and the trip buckle A7. The first extension platform 21 and the second extension platform 22 are respectively provided on the two side surfaces of the partition 2, and the third boss A43 and the fifth boss A22 are tilted on the corresponding contact seats. When the switch is in the open state, a first gap 23 is formed between the end of the third boss A43 and the first extension platform 21, and a second gap 24 is formed between the end of the fifth boss A22 and the second extension platform 22. The tilted arrangement will not hinder the rotation of the contact seat, and the rotation is smooth. When the contact seat moves, the side walls of the third boss A43 and the fifth boss A22 are always in conflict with the partition 2. The first gap 23 and the second gap 24 are relatively small, and the generated arc will be cut into small arcs even if it enters from the gap, thereby not affecting the locking and tripping between the two contact seats.

[0061] The activity space A65 is provided with a placement hole A651 and a toggle boss A652, and the fixed arm C21 is inserted into the placement hole A651. When the leakage current push arm C23 swings upward under the drive of the top rod, the swing arm C22 contacts the toggle boss A652 to drive the lock A6 to swing, and the range of movement of the pull rod C2 is limited, so that the swing arm C22 can only move within the activity space A65. The pull rod C2 will not affect the movement of other parts when swinging. The swing arm C22 contacts the toggle boss A652 to drive the lock A6 to swing to achieve disengagement. An active groove 12 is provided on the base 1 corresponding to the position of the leakage current push arm C23. The leakage current push arm C23 swings in the active groove 12. After the upper cover 3 is connected to the base 1, it is limited by the upper cover 3 to prevent it from detaching. The leakage release C also includes a coil skeleton C4, on which a guide groove C41 and a mounting groove C42 which are connected to each other are provided. The upper end of the iron core C11 of the leakage release C1 is located in the mounting groove C42, and the top rod C12 of the leakage release C1 is located in the guide groove C41, and the lower end extends into the mounting groove C42 to connect with the iron core C11 and slide synchronously, which can guide the sliding of the iron core C11 and the top rod C12. The structure is stable during movement, and the pull rod is better driven to swing, so as to realize the lock release. The part of the iron core C11 located outside the mounting groove is sleeved with an iron core spring, and the iron core spring applies a reset force to the iron core. A connecting rod is provided at the upper end of the iron core C11, a boss is provided on the connecting rod, a connecting hole is provided on the push rod C12, the connecting rod is inserted into the connecting hole with an interference fit, the iron core C11 and the push rod C12 are tightly fitted, which is convenient for the push rod and the iron core to slide synchronously, and a push block is provided at the upper end of the push rod, which is larger than the diameter of the push rod, so that when the iron core spring is reset, the push block will not enter the installation groove, and can be limited to facilitate the next tripping.

[0062] It also includes a power-taking mechanism D and a baffle 7, the baffle 7 is located between the base 1 and the upper cover 3, the power-taking mechanism D includes a button DA and a torsion spring D2, the torsion spring D2 includes a first extension arm D21 and a second extension arm D22, the first extension arm D21 is located below the button D1, a main circuit board F is provided on the base 1, and the second extension arm D22 contacts the main circuit board F, the electromagnetic system B also includes a yoke B2, a static contact is provided on the yoke B2, a spring sheet 71 is provided on the baffle 7, and the spring sheet 71 is located below the first extension arm D21, when the switch is closed, the L-pole contact seat A2 rotates to drive the L-pole moving contact A3 to move, and the two ends of the L-pole moving contact A3 are respectively in contact with the static contact and the spring sheet 71. Under the action of the button D2, the first extension arm D21 contacts the spring sheet 71, and the circuit is turned on. When the switch is opened, the two ends of the L-pole moving contact A3 are separated from the spring sheet 71 and the static contact respectively, and the circuit is disconnected. After closing the switch, the L-pole moving contact contacts the static contact and the spring sheet 71. At this time, the button is pressed, and the first extension arm D21 of the torsion spring D2 contacts the spring sheet 71 through the pressure of the button D1, and the second extension arm D22 contacts the main circuit board F. The circuit is turned on and power can be taken. After the switch is opened, the moving contact is disconnected from the static contact and the spring sheet 71 and is not in contact. At this time, there will be no electricity when the button is pressed, which protects the circuit breaker. No matter how the circuit breaker is connected, the circuit board will always have no electricity after the circuit breaker is disconnected, thereby improving the life of the circuit board. The baffle 7 is provided with a first slot 72, the base 1 is provided with a second slot 13 communicating with the first slot 72, the spring sheet 71 is inserted into the first slot 72 and the second slot 13, the spring sheet 71 is provided with an elastic clamping foot 711, a limiting groove 74 is provided on the side of the baffle 7 close to the base 1, and the elastic clamping foot 711 is clamped in the limiting groove 74, so that the structure of the spring sheet 71 is stable, the spring sheet 71 is limited by the base 1 to the front and back, and the slot limits the spring sheet 71 up and down to prevent the spring sheet 71 from detaching from the baffle 7. The baffle 7 is provided with a plug hole 73, and the upper cover 3 is provided with a plug column, and the baffle 7 is positioned by inserting the plug column into the plug hole 73 to make its structure stable.

[0063] The L-pole contact seat A2 is provided with a first placement groove A25 and a second placement groove A26 communicating with the first placement groove A25. The L-pole moving contact A3 is installed in the first placement groove A25. A contact piece 8 is provided in the second placement groove A26. A wire 9 is connected between the contact piece 8 and the L-pole moving contact. A connecting hook 81 is integrally formed on the upper end of the contact piece 8. The connecting hook 81 partly extends outside the second placement groove A26, and the part outside the second placement groove A26 is arranged in an arc shape. When the switch is closed, the connecting hook 81 contacts the spring piece 71. The contact piece 8 is connected to the L-pole moving contact A3 through a wire 9, and the two ends of the wire 9 are respectively welded to the contact piece 8 and the L-pole moving contact A3, so that the conductive performance is good and it is convenient to drive the contact piece 8 to move when the L-pole moving contact A3 moves. When the switch is closed, the L-pole moving contact A3 contacts the yoke, and the contact piece 8 contacts the spring piece 71 to realize the conduction of the circuit. The setting of the connecting hook 81 makes the structure of the contact piece 8 stable, and the contact part with the spring piece 71 is arranged in an arc shape, so that no friction is generated between the arc part and the spring piece 71, and it will not get stuck or deformed. A blocking piece 20 is provided in the second placement groove A26 on the outer side of the contact piece 8, and a groove is provided on the blocking piece 20. A protrusion A261 is provided on the inner side wall of the second placement groove A26, and the protrusion A261 is clamped in the groove. The blocking piece 20 and the second placement groove A26 are interference fit, and a plurality of protrusions are provided on the two side walls of the blocking piece 20. When the blocking piece 20 is installed in the second placement groove A26, each protrusion cooperates with the inner side wall of the second placement groove A26. The setting of the blocking piece 20 positions the contact piece 8 to prevent it from falling off from the second placement groove A26 and affecting the contact with the spring piece 71. It is not easy to fall off after installation, and further stabilizes the structure of the contact piece 8 so that it will not fall off from the second placement groove A26.

[0064] The base 1 is provided with an indicating device E, which includes a light guide E10, an indicator light E11 and an indicator light circuit board E12. The light guide E10 is supported by a light-transmitting material. The base 1 is provided with an indicating window 14. The light guide E10 is partially located in the indicating window 14. The indicator light E11 is arranged on the indicator light circuit board E12. The indicator light circuit board E12 is connected to the main circuit board F. A positioning member 15 is provided in the base 1. The positioning member 15 includes a vertically arranged positioning plate 151 and two positioning bosses 152 and a positioning sheet 153 arranged horizontally on the positioning plate 151. The vertical arrangement is as follows Figure 2 , 3As shown, two positioning bosses 152 are separated and arranged to form a light guide channel, the light guide member E10 is located on the two positioning bosses 152, the positioning sheet 153 is located below the two positioning bosses 152, and a placement area 154 is formed between the positioning sheet 153 and the two positioning bosses 152, the indicator light circuit board E12 is located in the placement area 154, and the indicator light E11 corresponds to the light guide channel, and the light guide member E10 and the indicator light circuit board E12 are positioned by the positioning member 15, so that the light guide member E10 and the indicator light circuit board E12 are 2 has a stable structure. When the light guide E10 is pressed under the action of external force, it will not slide into the shell. The positioning plate 151, the positioning boss 152 and the positioning piece 153 form a U shape and cooperate with the inner wall of the base 1 to position the indicator circuit board E12 and improve its stability. The light of the indicator light E11 is transmitted from the light guide channel and passes through the light guide E10 to the outside of the shell. The setting of the positioning member 15 can position the light guide E10 and the indicator circuit board E12 without hindering the transmission of light. The base 1 is provided with a mounting shaft 16, and the L-pole contact seat A2 and the N-pole contact seat A4 are both provided with connecting grooves A27 and A46, and the two connecting grooves are located at the same height. A first tension spring 161 is provided between the mounting shaft 16 and the L-pole contact seat A2, and a second tension spring 162 is provided between the mounting shaft 16 and the N-pole contact seat A4. The connecting groove is set as an elliptical groove, and one end of the tension spring is hooked in the elliptical groove to generate an overtravel. The setting of the tension spring can cause it to return to its original position when the product is tripped, and can generate a final pressure. Under the pull of the tension spring, the contact seat rotates around the pin shaft, driving the moving contact to move, and realizing the disconnection movement with the static contact. The two tension springs generate a pulling force on the two contact seats, so that the contact seat has good stability during the opening and closing action, and will not be deflected, ensuring that the moving and static contacts are in good contact. The mounting shaft 16 can be used to install the tension spring and can also be used to install the positioning member 15. The mounting shaft 16 runs through the positioning member 15, and the two ends of the mounting shaft 16 are respectively connected to the base 1 and the upper cover 3.

[0065] The base 1 is provided with an indicating device installation area 17, a main circuit board installation area 18, and an operating mechanism installation area 19. The operating mechanism installation area 19 is provided with a wiring groove 191 for installing the wire 9. The indicating device installation area 17 and the main circuit board installation area 18 are connected through the wiring groove 191. The base 1 is provided with a wire pressing piece 10 and the baffle 7 at a position corresponding to the operating mechanism installation area 19. The wire 9 is pressed into the wiring groove 191 through the baffle 7 and the wire pressing piece 10. The baffle 7 and the wire pressing piece 10 isolate the wire 9 from the handle A1 and the contact seat. When the handle A1 or the contact seat is in operation, the wire 9 will not be worn, and the wire 9 is protected. The baffle 20 and the wire pressing piece 10 are both made of insulating materials. The baffle 7 can be used to position the spring piece 71 and protect the wire 9. One object has multiple uses, so that the structural layout inside the circuit breaker is reasonable.

Claims

1. A circuit breaker, comprising a base (1), a partition (2), an upper cover (3), an operating mechanism (A), an electromagnetic system (B) and a leakage tripping mechanism (C), wherein the partition (2) is located between the base (1) and the upper cover (3), and the leakage tripping mechanism (C) comprises a leakage tripping device (C1), characterized in that: The operating mechanism (A) comprises a handle (A1), an L-pole contact seat (A2), an L-pole moving contact (A3) arranged on the L-pole contact seat (A2), an N-pole contact seat (A4), an N-pole moving contact (A5) arranged on the N-pole contact seat (A4), a lock (A6) and a trip button (A7); the handle (A1) is connected to the trip button (A7) via a connecting rod (A8); the L-pole contact seat (A2) and the N-pole contact seat (A4) are respectively arranged on both sides of the partition (2); the L-pole contact seat (A2) is connected to the N-pole contact seat (A4) via a connecting column (A9) to form an installation space (4); the lock (A6) and the trip button (A7) are rotatably arranged in the installation space (4); and the trip button (A7) ) is rotatably sleeved on the connecting column (A9), the N-pole contact seat (A4) is provided with a first boss (A41), a second boss (A42) and a third boss (A43) on the side facing the L-pole contact seat (A2), the second boss (A42) is located on the left side of the first boss (A41) and is spaced apart from the first boss (A41), the middle part of the lock buckle (A6) is installed between the first boss (A41) and the second boss (A42) through a pin shaft, the upper end of the lock buckle (A6) is provided with a bite surface (A61) that contacts and cooperates with the jump buckle (A7) to limit the rotation of the jump buckle, and the L-pole contact seat (A2) is correspondingly provided with a fourth boss (A21) and a fifth boss (A23) on the side facing the N-pole contact seat (A4). 2), when the L-pole contact seat (A2) is connected to the N-pole contact seat (A4), the first boss (A41) abuts against the L-pole contact seat (A2), the second boss (A42) abuts against the fourth boss (A21), the third boss (A43) and the fifth boss (A22) are located on both sides of the partition (2) and are arranged to abut against the partition (2), the lock (A6) is provided with a tripping rod (A64), the tripping rod (A64) is located below the second boss (A42) and the fourth boss (A21), when in the closed state, the tripping rod (A64) extends out of the installation space (4) and is located on one side of the electromagnetic system (B), when tripping, the lock (A6) rotates under the action of the electromagnetic system (B), and the tripping rod (A64) is arranged to be in a closed state. 4) retract the installation space (4), the leakage current release mechanism (C) also includes a pull rod (C2), the pull rod (C2) includes a fixed arm (C21) formed in one piece or fixedly connected, a swing arm (C22) and a leakage current push arm (C23), the fixed arm (C21) is connected to the lock buckle (A6), the lock buckle (A6) is provided with an activity space (A65), the swing arm (C22) moves in the activity space (A65), the leakage current push arm (C23) is arranged at a position corresponding to the top rod of the leakage current releaser (C1), when the leakage current push arm (C23) swings upward under the drive of the top rod of the leakage current releaser (C1), the swing arm (C22) drives the lock buckle (A6) to swing to achieve release.

2. The circuit breaker according to claim 1, characterized in that: The electromagnetic system (B) comprises a moving iron core and a push rod (B1) that slides synchronously with the moving iron core. A sixth boss (A44) is provided on the N-pole contact seat (A4) below the second boss (A42). A seventh boss (A23) is provided on the L-pole contact seat (A2) below the fourth boss (A21). The sixth boss (A44) and the seventh boss (A23) are separated from each other. A trip rod (A64) is located between the sixth boss (A44) and the seventh boss (A23). The sixth boss (A44) and the outer side surface of the second boss (A42) are integrally formed to form a first arc surface (5). The seventh boss (A23) and the outer side surface of the fourth boss (A21) are integrally formed to form a second arc surface (6). When the trip rod (A64) is retracted, the end of the push rod is disposed in contact with the two arc surfaces.

3. The circuit breaker according to claim 1 or 2, characterized in that: A placement hole (A651) and a toggle boss (A652) are provided in the activity space (A65), and the fixed arm (C21) is inserted into the placement hole (A651). When the leakage push arm (C23) swings upward under the drive of the push rod, the swing arm (C22) contacts the toggle boss (A652) to drive the lock buckle (A6) to swing.

4. The circuit breaker according to claim 1 or 2, characterized in that: The pull rod (C2) further includes a bimetal push arm (C24), the bimetal push arm (C24) being located between the swing arm (C22) and the leakage push arm (C23), and the base (1) being provided with a bimetallic strip (11), the bimetallic strip (11) being located on one side of the bimetallic push arm (C24), and driving the bimetallic push arm (C24) to swing when the bimetallic strip (11) heats up and bends, thereby driving the lock buckle (A6) to swing to achieve release.

5. The circuit breaker according to claim 1 or 2, characterized in that: The device also includes a power supply mechanism (D) and a baffle (7), wherein the baffle (7) is located between the base (1) and the upper cover (3), wherein a main circuit board (F) is provided on the base (1), wherein the power supply mechanism (D) includes a button (D1) and a torsion spring (D2), wherein the torsion spring (D2) includes a first extension arm (D21) and a second extension arm (D22), wherein the first extension arm (D21) is located below the button (D1), and the second extension arm (D22) is in contact with the main circuit board (F), and wherein the electromagnetic system (B) also includes a yoke (B2), wherein the yoke (B2) A static contact is provided on the baffle (7), and a spring sheet (71) is provided on the baffle (7). The spring sheet (71) is located below the first extension arm (D21). When the switch is closed, the L-pole contact seat (A2) rotates to drive the L-pole moving contact (A3) to move, and the two ends of the L-pole moving contact (A3) are respectively in contact with the static contact and the spring sheet (71). Under the action of the button (D1), the first extension arm (D21) is in contact with the spring sheet (71), and the circuit is turned on. When the switch is opened, the two ends of the L-pole moving contact (A3) are respectively separated from the spring sheet (71) and the static contact, and the circuit is disconnected.

6. The circuit breaker according to claim 5, characterized in that: The baffle plate (7) is provided with a first slot (72), the base (1) is provided with a second slot (13) communicating with the first slot (72), the spring sheet (71) is inserted into the first slot (72) and the second slot (13), the spring sheet (71) is provided with an elastic clamping foot (711), and a limiting slot (74) is provided on one side of the baffle plate (7) close to the base (1), and the elastic clamping foot (711) is clamped in the limiting slot (74).

7. The circuit breaker according to claim 5, characterized in that: The L-pole contact seat (A2) is provided with a first placement groove (A25) and a second placement groove (A26) communicating with the first placement groove (A25); the L-pole moving contact (A3) is installed in the first placement groove (A25); a contact piece (8) is provided in the second placement groove (A26); a wire (9) is connected between the contact piece (8) and the L-pole moving contact (A3); a connecting hook (81) is integrally formed at the upper end of the contact piece (8); a portion of the connecting hook (81) extends outside the second placement groove (A26), and a portion outside the second placement groove (A26) is arranged in an arc shape; when the switch is closed, the connecting hook (81) contacts the spring piece (71).

8. The circuit breaker according to claim 1 or 2, characterized in that: A first extension platform (21) and a second extension platform (22) are respectively provided on both side surfaces of the partition plate (2); a third boss and a fifth boss (A22) are obliquely arranged on corresponding contact seats; in an open state, a first gap (23) is formed between the end of the third boss and the first extension platform (21); and a second gap (24) is formed between the end of the fifth boss (A22) and the second extension platform (22).

9. The circuit breaker according to claim 5, characterized in that: The base (1) is provided with an indicating device (E), the indicating device (E) comprising a light guide (E10), an indicator light (E11) and an indicator light circuit board (E12); the base (1) is provided with an indicating window (14), the light guide (E10) is partially located in the indicating window (14), the indicator light (E11) is arranged on the indicator light circuit board (E12), the indicator light circuit board (E12) is connected to the main circuit board (F), and a positioning member (15) is provided in the base (1), the positioning member (15) comprising a vertically arranged positioning plate (151) and two positioning bosses (152) and a positioning sheet (153) arranged transversely on the positioning plate (151), the two positioning bosses (152) being arranged apart to form a light guide channel, the light guide member (E10) being located on the two positioning bosses (152), the positioning sheet (153) being located below the two positioning bosses (152), and a placement area (154) being formed between the positioning sheet (153) and the two positioning bosses (152), the indicator light circuit board (E12) being located in the placement area (154), and the indicator light (E11) corresponding to the light guide channel.

10. The circuit breaker according to claim 9, characterized in that The base (1) is provided with an indicating device installation area (17), a main circuit board installation area (18), and an operating mechanism installation area (19); a wiring groove (191) for installing a wire (9) is provided in the operating mechanism installation area (19); the indicating device installation area (17) and the main circuit board installation area (18) are connected via the wiring groove (191); a wire pressing piece (10) and the baffle (7) are provided at a position corresponding to the operating mechanism installation area (19) on the base (1); the wire (9) is pressed into the wiring groove (191) via the baffle (7) and the wire pressing piece (10).

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