A double-break auxiliary contact assembly for a circuit breaker

Abstract

This utility model discloses a dual-break auxiliary contact assembly for circuit breakers, relating to the field of electrical technology. The utility model includes a housing, a tripping system, a contact system, a cover plate, a compression spring, and a miniature circuit breaker. The tripping system, through the coordination of components such as support members, latches, and trip levers, utilizes the elasticity of various springs to transmit action. The contact system includes a contact support and multiple sets of moving and stationary contacts; its unique structural design ensures reliable circuit switching. The housing is equipped with specific guide grooves, positioning posts, and snap-fit ​​grooves, and is snapped into the cover plate via convex cylinders and limiting riveting holes, providing a stable framework for the entire assembly and limiting the movement of each component. Through components such as trip levers and connecting pins, this auxiliary contact assembly can be tightly connected to the circuit breaker to achieve coordinated operation. This utility model aims to improve the performance of the circuit breaker auxiliary contact assembly in terms of contact opening distance, vibration resistance, and connection reliability.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a double-break auxiliary contact group for a circuit breaker. Background Technology

[0002] As market demand for miniature circuit breakers (MCBs) grows increasingly widespread, the requirements for their control and protection functions are also becoming more comprehensive. As an important accessory for MCBs, the market usage of double-break auxiliary contact modules is showing a year-on-year growth trend. However, existing double-break auxiliary contact assemblies have certain shortcomings in terms of contact spacing, vibration resistance, and connection reliability. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a double-break auxiliary contact assembly for circuit breakers, which solves the shortcomings of existing double-break auxiliary contact assemblies in terms of contact spacing, vibration resistance, and connection reliability.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A dual-break auxiliary contact assembly for a circuit breaker includes a housing, a tripping system, a contact system, a cover plate, a compression spring, and a miniature circuit breaker.

[0006] The tripping system consists of a support component, a latch, a trip lever, a handle, a crankshaft, an indicator, a first torsion spring, a second torsion spring, and a tension spring.

[0007] The contact system consists of a contact support, a crank, a reaction spring, a first moving contact, a second moving contact, a first stationary contact, a second stationary contact, a third stationary contact, and a fourth stationary contact;

[0008] The outer shell has a first rectangular guide groove in the middle, and the upper part of the first rectangular guide groove has a first positioning post, a first hook post, a second hook post, a positioning pivot, a second positioning post and a release groove. The two sides of the first rectangular guide groove are respectively provided with snap-fit ​​grooves, and a number of convex cylinders are distributed inside the outer shell.

[0009] The first torsion spring is sleeved on the concentrically perforated cylinder of the support and then rotatably connected to the positioning shaft of the outer shell. The first pin of the first torsion spring is connected to the spring hook of the support and the second pin of the first torsion spring is connected to the first hanging post of the outer shell.

[0010] The positioning and turning hole of the latch is rotatably sleeved on the concentric cylinder of the support, the positioning hole of the jump buckle is rotatably sleeved on the third positioning post of the support, and the locking tongue of the jump buckle abuts against the locking platform of the latch.

[0011] The first plug of the crankshaft is inserted into the guide hole of the handle, and the second plug is inserted into the guide groove of the support after passing through the flared hole of the latch, so that the second plug of the crankshaft moves in the guide groove in a specified direction.

[0012] A second torsion spring is installed in the annular cavity of the handle. The third pin of the second torsion spring is inserted into the claw-shaped hook of the handle, and the fourth pin of the second torsion spring is attached to the outer shell. The positioning guide hole of the handle is rotatably sleeved on the first positioning post of the outer shell.

[0013] The first pull ring of the tension spring is hooked onto the second hook post of the outer shell, and the second pull ring is hooked onto the anti-drop hook of the support.

[0014] The contact bracket is slidably installed in the first rectangular guide groove of the housing. The first moving contact and the second moving contact are respectively installed in the rectangular windows of the contact bracket. A guide plate is provided between the two rectangular windows of the contact bracket. The top and bottom of the guide plate are provided with limiting posts. A compression spring is sleeved on the limiting post at the top of the guide plate. The other end of the compression spring abuts against the first convex positioning platform of the first moving contact. A reaction spring is sleeved on the limiting post at the bottom of the guide plate. The other end of the reaction spring abuts against the second convex positioning platform of the second moving contact. The bottom surfaces of the first moving contact are respectively provided with first conical contact points at both ends. The top surfaces of the second moving contact are respectively provided with second conical contact points at both ends. The first moving contact and the second moving contact are arranged back to back, so that the first conical contact point and the second conical contact point on the first moving contact and the second moving contact point face upward and downward respectively.

[0015] The first rod of the crank is inserted into the hook-and-turn hole of the handle, and the second rod is inserted into the guide hole of the contact bracket.

[0016] The first contact plate of the first stationary contact, the second contact plate of the second stationary contact, the third contact plate of the third stationary contact, and the fourth contact plate of the fourth stationary contact are respectively snapped into the snap-fit ​​groove of the housing. The tails of the first stationary contact, the second stationary contact, the third stationary contact, and the fourth stationary contact are respectively snapped into the first quick-connect terminal, the second quick-connect terminal, the third quick-connect terminal, and the fourth quick-connect terminal. Signal wires are snapped into the first quick-connect terminal, the second quick-connect terminal, the third quick-connect terminal, and the fourth quick-connect terminal. The heads of the first stationary contact, the second stationary contact, the third stationary contact, and the fourth stationary contact are respectively provided with the first contact, the second contact, the third contact, and the fourth contact. The first conical contact of the first moving contact corresponds to the first contact of the first stationary contact and the fourth contact of the fourth stationary contact. The second conical contact of the second moving contact corresponds to the second contact of the second stationary contact and the third contact of the third stationary contact.

[0017] The cover plate is provided with a second rectangular guide groove, a limiting rib and a limiting riveting hole at the positions of the first rectangular guide groove, the snap-fit ​​groove and the convex cylinder corresponding to the outer shell; and a hook is provided on the outer side of the cover plate.

[0018] The convex cylinder of the outer shell and the limiting riveting hole of the cover plate are engaged to achieve the snap-fit ​​between the two. The contact bracket is slidably disposed between the first rectangular guide groove and the second rectangular guide groove. The first stationary contact, the second stationary contact, the third stationary contact and the fourth stationary contact are snap-fitted and limited by the snap-fit ​​groove and the limiting rib.

[0019] The jump buckle pin passes through the guide groove of the cover plate and is inserted into the guide hole of the circuit breaker. The connecting pin of the handle is inserted into the pin hole of the circuit breaker handle, and the hook of the cover plate is hooked into the hook hole of the circuit breaker.

[0020] Furthermore, it also includes an indicator, which has a concentric cylindrical hole and a fixing hole. The top of the indicator has a two-color indicator strip. The concentric cylindrical hole is rotatably sleeved on the positioning shaft of the outer shell, and the fixing hole is rotatably sleeved on the fourth positioning post of the support. A viewing window is opened on the outer shell at the position corresponding to the two-color indicator strip to display the on and off status.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] The beneficial effects of this utility model are as follows: By combining and installing it with a miniature circuit breaker and connecting it to an electrical system, this utility model effectively monitors the continuity reliability of the electrical circuit system. Each group of contacts in the dual-contact system can independently collect the connection and disconnection information of the electrical circuit. Compared with a single-break system, its advantage is the prevention of cross-circuit signals, thus protecting low-voltage lines and electrical equipment. It provides a reliable and effective technical means to prevent electrical equipment defects and accidents, promptly cut off power, and protect equipment and personal safety. Attached Figure Description

[0023] Figure 1 This is the front view of this utility model;

[0024] Figure 2 This is a structural diagram of the outer shell;

[0025] Figure 3 This is a schematic diagram of the jump hook mechanism;

[0026] Figure 4 This is a structural schematic diagram of the support component;

[0027] Figure 5 This is a schematic diagram of the latch structure;

[0028] Figure 6 This is a structural schematic diagram of the indicator;

[0029] Figure 7 This is a schematic diagram of the crankshaft structure;

[0030] Figure 8 This is a schematic diagram of the handle structure;

[0031] Figure 9 This is a schematic diagram of the structure of the first torsion spring;

[0032] Figure 10 This is a schematic diagram of the crank mechanism;

[0033] Figure 11 This is a schematic diagram of the structure of the first stationary contact;

[0034] Figure 12 This is a schematic diagram of the structure of the second stationary contact;

[0035] Figure 13 This is a schematic diagram of the structure of the first moving contact;

[0036] Figure 14 This is a schematic diagram of the contact support structure;

[0037] Figure 15 This is a schematic diagram of the third stationary contact;

[0038] Figure 16 This is a schematic diagram of the fourth stationary contact;

[0039] Figure 17 This is a schematic diagram of the front and back structures of the cover plate;

[0040] Figure 18 This is a schematic diagram of a compression spring structure;

[0041] Figure 19 This is a schematic diagram of the second torsion spring structure;

[0042] Figure 20 This is a schematic diagram of a tension spring structure;

[0043] Figure 21 This is a schematic diagram of the combination with a circuit breaker.

[0044] In the picture:

[0045] 1. Housing; 2. Jumper; 3. Support; 4. Lock; 5. Indicator; 6. Crankshaft; 7. Handle; 8. First Torsion Spring; 9. Crank; 10. First Stationary Contact; 11. Second Stationary Contact; 12. First Moving Contact; 13. Contact Bracket; 14. Third Stationary Contact; 15. Fourth Stationary Contact; 16. Cover Plate; 17. Compression Spring; 18. Second Torsion Spring; 19. Tension Spring; 20. Miniature Circuit Breaker; 21. Second Moving Contact; 101. Inspection Window; 103. Convex Cylinder; 104. Second Hanging Post; 105. Snap-fit ​​Slot; 106. Positioning Shaft; 107. First Rectangular Guide 108. Groove; 109. First hook post; 110. Second positioning post; 201. Positioning hole; 202. Jumper post; 203. Locking tongue; 204. Jumper hook post; 301. Concentric cylinder; 302. Guide groove; 303. Concentrically perforated cylinder; 304. Anti-fall hook; 305. Spring hook; 306. Fourth positioning post; 307. Third positioning post; 401. Positioning and turning hole; 402. Horn hole; 403. Locking platform; 501. Two-color indicator strip; 502. Concentric cylindrical hole; 503. Fixing hole; 601. First plug; 602. Second plug; 701. Hook 702. Turning hole; 703. Claw-shaped hook; 704. Positioning guide hole; 705. Guide hole; 706. Connecting pin; 807. First pin; 808. Second pin; 909. First insertion rod; 900. Second insertion rod; 1001. First contact point; 1002. First contact plate; 1003. First quick-connect terminal; 1101. Second contact point; 1102. Second contact plate; 1103. Second quick-connect terminal; 1202. First convex positioning platform; 1203. First conical contact point; 1204. Second conical contact point; 1205. Second convex positioning platform; 1301. Guide plate; 1302. 1304. Limiting post; 1305. Guide hole; 1306. Rectangular window; 1401. Third contact; 1402. Third contact plate; 1403. Third quick-connect terminal; 1501. Fourth contact; 1502. Fourth contact plate; 1503. Fourth quick-connect terminal; 1601. Limiting riveting hole; 1603. Limiting rib; 1604. Second rectangular guide groove; 1605. Guide groove; 1606. Hook; 1801. Third pin; 1802. Fourth pin; 1901. First pull ring; 1902. Second pull ring; 2001. Pin hole; 2002. Guide hole; 2003. Hanging hole. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0047] A dual-break auxiliary contact assembly for a circuit breaker comprises a housing 1, a tripping system, a contact system, a cover plate 16, a compression spring 17, and a miniature circuit breaker 20.

[0048] The tripping system consists of a support component 3, a latch 4, a jump latch 2, a handle 7, a crankshaft 6, an indicator 5, a first torsion spring 8, a second torsion spring 18, and a tension spring 19.

[0049] The contact system consists of a contact support 13, a crank 9, a reaction spring, a first moving contact 12, a second moving contact 21, a first stationary contact 10, a second stationary contact 11, a third stationary contact 14, and a fourth stationary contact 15.

[0050] The outer shell 1 has a first rectangular guide groove 107 in the middle. The upper part of the first rectangular guide groove 107 is provided with a first positioning post 110, a first hook post 108, a second hook post 104, a positioning rotating shaft 106, a second positioning post 109 and a release groove. The first rectangular guide groove 107 has snap-fit ​​grooves 105 on both sides. A plurality of convex cylinders 103 are distributed inside the outer shell 1.

[0051] After the first torsion spring 8 is sleeved on the concentrically perforated cylinder 303 of the support member 3, it is rotatably connected to the positioning shaft 106 of the outer shell 1. The first pin 801 of the first torsion spring 8 is connected to the spring hook 305 of the support member 3, and the second pin 802 of the first torsion spring 8 is connected to the first hanging post 108 of the outer shell 1.

[0052] The positioning and turning hole 401 of the latch 4 is rotatably sleeved on the concentric cylinder 301 of the support member 3, the positioning hole 201 of the jump buckle 2 is rotatably sleeved on the third positioning post 307 of the support member 3, and the locking tongue 203 of the jump buckle 2 abuts against the locking platform 403 of the latch 4.

[0053] The first plug 601 of the crankshaft 6 is inserted into the guide hole 704 of the handle 7, and the second plug 602 is inserted into the guide groove 302 of the support 3 after passing through the flared hole 402 of the latch 4, so that the second plug 602 of the crankshaft 6 moves in a predetermined direction within the guide groove 302.

[0054] A second torsion spring 18 is installed in the annular cavity of the handle 7. The third pin 1801 of the second torsion spring 18 is inserted into the claw-shaped hook 702 of the handle 7. The fourth pin 1802 of the second torsion spring 18 is attached to the outer shell 1. The positioning guide hole 703 of the handle 7 is rotatably sleeved on the first positioning post 110 of the outer shell 1.

[0055] The first pull ring 1901 of the tension spring 19 is hooked on the second hook post 104 of the outer shell 1, and the second pull ring 1902 is hooked on the anti-drop hook 304 of the support 3.

[0056] The contact support 13 is slidably mounted in the first rectangular guide groove 107 of the housing 1. The first moving contact 12 and the second moving contact 21 are respectively mounted in the rectangular windows 1306 of the contact support 13. A guide plate 1301 is provided between the two rectangular windows 1306 of the contact support 13. The top and bottom of the guide plate 1301 are provided with limiting posts 1302. A compression spring 17 is sleeved on the limiting post 1302 at the top of the guide plate 1301. The other end of the compression spring 17 abuts against the first convex positioning platform 120 of the first moving contact 12. 2. A reaction spring is sleeved on the limiting post 1302 at the bottom of the guide plate 1301. The other end of the reaction spring abuts against the second convex positioning platform 1205 of the second moving contact 21. The bottom surfaces of the first moving contact 12 are respectively provided with first conical contact points 1203, and the top surfaces of the second moving contact 21 are respectively provided with second conical contact points 1204. The first moving contact 12 and the second moving contact 21 are arranged back to back, so that the first conical contact points 1203 and the second conical contact points 1204 on the first moving contact 12 and the second moving contact face upward and downward respectively.

[0057] The first insert 901 of the crank 9 is inserted into the hook-and-turn hole 701 of the handle 7, and the second insert 902 is inserted into the guide hole 1304 of the contact bracket 13.

[0058] The first contact plate 1002 of the first stationary contact 10, the second contact plate 1102 of the second stationary contact 11, the third contact plate 1402 of the third stationary contact 14, and the fourth contact plate 1502 of the fourth stationary contact 15 are respectively snapped into the snap-fit ​​groove 105 of the housing 1. The tail portions of the first stationary contact 10, the second stationary contact 11, the third stationary contact 14, and the fourth stationary contact 15 are respectively snapped into the first quick-connect terminal 1003, the second quick-connect terminal 1103, the third quick-connect terminal 1403, and the fourth quick-connect terminal 1503. Signal wires are snapped into terminals 1403 and 1503. The heads of the first stationary contact 10, the second stationary contact 11, the third stationary contact 14, and the fourth stationary contact 15 are respectively provided with a first contact 1001, a second contact 1101, a third contact 1401, and a fourth contact 1501. The first conical contact 1203 of the first moving contact 12 corresponds to the first contact 1001 of the first stationary contact 10 and the fourth contact 1501 of the fourth stationary contact 15. The second conical contact 1204 of the second moving contact 21 corresponds to the second contact 1101 of the second stationary contact 11 and the third contact 1401 of the third stationary contact 14.

[0059] The cover plate 16 is provided with a second rectangular guide groove 1604, a limiting rib 1603 and a limiting riveting hole 1601 at the positions corresponding to the first rectangular guide groove 107, the snap-fit ​​groove 105 and the convex cylinder 103 of the outer shell 1. The cover plate 16 is provided with a hook 1606 on the outer side.

[0060] The convex cylinder 103 of the outer shell 1 and the limiting riveting hole 1601 of the cover plate 16 are engaged to achieve the interlocking of the two. The contact bracket 13 is slidably disposed between the first rectangular guide groove 107 and the second rectangular guide groove 1604. The first stationary contact 10, the second stationary contact 11, the third stationary contact 14 and the fourth stationary contact 15 are engaged and limited by the interlocking groove 105 and the limiting rib 1603.

[0061] By rotating the handle 7, the crankshaft 6 is rotated, causing the contact bracket 13 to move up and down. The second conical contact 1204 of the second moving contact 21 is disconnected from the second stationary contact 11, the second contact 1101 of the third stationary contact 14, and the third contact 1401 of the third stationary contact 14. The first conical contact 1203 of the first moving contact 12 is closed from the first stationary contact 10 and the fourth stationary contact 15, thus completing the closing action. Conversely, the opening action is completed.

[0062] The trip pin 202 of the trip pin 2 passes through the guide groove 1605 of the cover plate 16 and is inserted into the guide hole 2002 of the circuit breaker. The trip pin hook post 204 of the trip pin 2 passes through the outer shell 1 and can be used to connect the trip pin of the second auxiliary group tripping system. The connecting pin 705 of the handle 7 is inserted into the pin hole 2001 of the circuit breaker handle. The hook 1606 of the cover plate 16 is hooked into the hook hole 2003 of the circuit breaker. When the double-break auxiliary contact group of the second circuit breaker is connected to the double-break auxiliary contact group of the first circuit breaker, the trip pin 202 of the double-break auxiliary contact group of the second circuit breaker is inserted into the trip pin hook post 204 of the double-break auxiliary contact group of the first circuit breaker, so that the circuit breaker and the double-break auxiliary contact group of the circuit breaker can work simultaneously, reducing the time interval between closing and tripping.

[0063] It also includes an indicator 5, which has a concentric cylindrical hole 502 and a fixing hole 503. The top of the indicator 5 has a two-color indicator strip 501. The concentric cylindrical hole 502 is rotatably sleeved on the positioning shaft 106 of the outer shell 1, and the fixing hole 503 is rotatably sleeved on the fourth positioning post 306 of the support 3. A viewing window 101 is opened on the outer shell 1 at the position corresponding to the two-color indicator strip 501 to display the connection and disconnection status.

[0064] Closing process

[0065] When a closing operation is required, the handle 7 is rotated. The positioning guide hole 703 of the handle 7 is rotatably fitted onto the first positioning post 110 of the outer casing 1, and the second torsion spring 18 installed within its annular cavity provides a certain elastic force. During the rotation of the handle 7, the crankshaft 6 connected to it begins to move. The first plug 601 of the crankshaft 6 is inserted into the guide hole 704 of the handle 7, and the second plug 602 is inserted through the flared hole 402 of the latch 4 and then into the guide groove 302 of the support member 3. As the handle 7 rotates, the second plug 602 of the crankshaft 6 moves in a predetermined direction within the guide groove 302, causing the support member 3 to rotate around the positioning shaft 106 of the outer casing 1.

[0066] Simultaneously, the movement of the crankshaft 6 is transmitted to the contact support 13 via the crank 9. The first insertion rod 901 of the crank 9 is inserted into the hook-and-turn hole 701 of the handle 7, and the second insertion rod 902 is inserted into the guide hole 1304 of the contact support 13, causing the contact support 13 to move upward between the first rectangular guide groove 107 of the housing 1 and the second rectangular guide groove 1604 of the cover plate 16.

[0067] As the contact support 13 moves upward, the first moving contact 12 and the second moving contact 21 also move accordingly. The first conical contact 1203 of the first moving contact 12 closes with the first contact 1001 of the first stationary contact 10 and the fourth contact 1501 of the fourth stationary contact 15. At the same time, the second conical contact 1204 of the second moving contact 21 opens with the second contact 1101 of the second stationary contact 11 and the third contact 1401 of the third stationary contact 14, completing the closing action and making the circuit conductive.

[0068] Opening process

[0069] When it is necessary to open the circuit breaker, the handle 7 is rotated in the opposite direction, and the above-mentioned components move in the reverse order. The contact support 13 moves downward, the first conical contact 1203 of the first moving contact 12 separates from the first stationary contact 10 and the fourth stationary contact 15, and the second conical contact 1204 of the second moving contact 21 contacts the second stationary contact 11 and the third stationary contact 14, the circuit is broken, and the opening action is completed.

[0070] Release action

[0071] When an abnormal situation occurs in the circuit where the circuit breaker is located, such as overload or short circuit, the circuit breaker will trigger its tripping action. At this time, the tripping pin 202 of tripping pin 2 is driven by the internal mechanism of the circuit breaker, causing tripping pin 2 to rotate around the third positioning pin 307 of the support member 3. The locking tongue 203 of tripping pin 2 separates from the locking platform 403 of locking pin 4, and the support member 3 rotates rapidly under the action of the first torsion spring 8 and the tension spring 19, which in turn causes the contact support 13 to move rapidly through the crankshaft 6 and the crank 9, realizing the rapid disconnection of the contacts, cutting off the circuit, and protecting the equipment and personnel safety.

[0072] Status indicator

[0073] The concentric cylindrical hole 502 of the indicator 5 is rotatably fitted onto the positioning shaft 106 of the housing 1, and the fixing hole 503 is rotatably fitted onto the fourth positioning post 306 of the support 3. When the support 3 rotates, the indicator 5 rotates accordingly. The two-color indicator strip 501 on the top of the indicator 5 displays different colors through the viewing window 101 on the housing 1, intuitively indicating the on and off status of the circuit breaker, allowing operators to understand the circuit status in real time.

[0074] During installation;

[0075] The first torsion spring 8 is sleeved on the concentrically perforated cylinder 303 of the support member 3, so that the first pin 801 of the first torsion spring 8 is connected to the spring hook 305 of the support member 3, and the second pin 802 is connected to the first hanging post 108 of the outer shell 1. Then the support member 3 is rotatably connected to the positioning shaft 106 of the outer shell 1.

[0076] The positioning and turning hole 401 of the latch 4 is rotated and sleeved on the concentric cylinder 301 of the support 3, the positioning hole 201 of the jump buckle 2 is rotated and sleeved on the third positioning post 307 of the support 3, and the locking tongue 203 of the jump buckle 2 abuts against the locking platform 403 of the latch 4.

[0077] Insert the first plug 601 of the crankshaft 6 into the guide hole 704 of the handle 7, and insert the second plug 602 into the guide groove 302 of the support 3 after passing through the flared hole 402 of the latch 4.

[0078] A second torsion spring 18 is installed in the annular cavity of the handle 7, so that the third pin 1801 of the second torsion spring 18 is inserted into the claw-shaped hook 702 of the handle 7, and the fourth pin 1802 is attached to the outer shell 1. Then, the positioning guide hole 703 of the handle 7 is rotated and sleeved onto the first positioning post 110 of the outer shell 1.

[0079] The first pull ring 1901 of the tension spring 19 is hooked onto the second hook post 104 of the outer casing 1, and the second pull ring 1902 is hooked onto the anti-drop hook 304 of the support 3.

[0080] Contact system installation

[0081] The first moving contact 12 and the second moving contact 21 are respectively installed in the rectangular window 1306 of the contact bracket 13. A compression spring 17 is sleeved on the limiting post 1302 at the top of the guide plate 1301, with its other end abutting against the first convex positioning platform 1202 of the first moving contact 12; a reaction spring is sleeved on the limiting post 1302 at the bottom of the guide plate 1301, with its other end abutting against the second convex positioning platform 1205 of the second moving contact 21.

[0082] The first rod 901 of the crank 9 is inserted into the hook-and-turn hole 701 of the handle 7, and the second rod 902 is inserted into the guide hole 1304 of the contact bracket 13.

[0083] The first contact plate 1002 of the first stationary contact 10, the second contact plate 1102 of the second stationary contact 11, the third contact plate 1402 of the third stationary contact 14, and the fourth contact plate 1502 of the fourth stationary contact 15 are respectively snapped into the snap-fit ​​groove 105 of the housing 1, and the first quick-connect terminal 1003, the second quick-connect terminal 1103, the third quick-connect terminal 1403, and the fourth quick-connect terminal 1503 are respectively snapped into their tails, and then the signal wire is snapped into the quick-connect terminal.

[0084] Cover plate installation: The second rectangular guide groove 1604, the limiting rib 1603, and the limiting riveting hole 1601 on the cover plate 16 correspond to the first rectangular guide groove 107, the snap-fit ​​groove 105, and the convex cylinder 103 of the outer shell 1. The two are snapped together by the cooperation between the convex cylinder 103 of the outer shell 1 and the limiting riveting hole 1601 of the cover plate 16. At this time, the contact bracket 13 is slidably set between the first rectangular guide groove 107 and the second rectangular guide groove 1604. The snap-fit ​​groove 105 and the limiting rib 1603 snap and limit the first stationary contact 10, the second stationary contact 11, the third stationary contact 14, and the fourth stationary contact 15.

[0085] Connect to circuit breaker

[0086] After the trip button 202 of the trip button 2 passes through the guide groove 1605 of the cover plate 16, it is inserted into the guide hole 2002 of the circuit breaker. The trip button hook post 204 of the trip button 2 passes through the outer shell 1.

[0087] Insert the connecting pin 705 of the handle 7 into the pin hole 2001 of the circuit breaker handle, and hook 1606 of the cover plate 16 is hung in the hanging hole 2003 of the circuit breaker.

[0088] Indicator installation: Rotate the concentric cylindrical hole 502 of the indicator 5 onto the positioning shaft 106 of the housing 1, and rotate the fixing hole 503 onto the fourth positioning post 306 of the support 3 to ensure that the viewing window 101 on the housing 1 corresponds to the two-color indicator strip 501 on the top of the indicator 5.

[0089] Multiple circuit breakers connected

[0090] When multiple circuit breakers need to be connected, the trip pin 202 of the double-break auxiliary contact group of the second circuit breaker is inserted into the trip pin 204 of the double-break auxiliary contact group of the first circuit breaker, so that the double-break auxiliary contact groups of multiple circuit breakers can work simultaneously, reducing the time interval between closing and tripping, and realizing the coordinated control of multiple circuit breakers.

[0091] In practical use, operators can perform closing and opening operations by rotating handle 7. To close, turn handle 7 clockwise to close the contacts; to open, turn handle 7 counterclockwise to open the contacts. Simultaneously, the operating status of the circuit breaker can be monitored in real time by observing the color of the dual-color indicator strip 501 within the inspection window 101 on the outer casing 1. If an abnormality occurs in the circuit, the circuit breaker will automatically trip to protect the circuit.

[0092] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-break auxiliary contact set for a circuit breaker, characterized by: It includes a housing (1), a tripping system, a contact system, a cover plate (16), a compression spring (17), and a miniature circuit breaker (20); The tripping system consists of a support (3), a latch (4), a jumper (2), a handle (7), a crankshaft (6), an indicator (5), a first torsion spring (8), a second torsion spring (18), and a tension spring (19); The contact system consists of a contact support (13), a crank (9), a reaction spring, a first moving contact (12), a second moving contact (21), a first stationary contact (10), a second stationary contact (11), a third stationary contact (14), and a fourth stationary contact (15); The outer shell (1) is provided with a first rectangular guide groove (107) in the middle. The upper part of the first rectangular guide groove (107) is provided with a first positioning post (110), a first hook post (108), a second hook post (104), a positioning pivot (106), a second positioning post (109) and a release groove. The first rectangular guide groove (107) is provided with snap-fit ​​grooves (105) on both sides. A number of convex cylinders (103) are distributed inside the outer shell (1). The first torsion spring (8) is sleeved on the concentrically perforated cylinder (303) of the support member (3) and then rotatably connected to the positioning shaft (106) of the outer shell (1). The first pin (801) of the first torsion spring (8) is connected to the spring hook (305) of the support member (3), and the second pin (802) of the first torsion spring (8) is connected to the first hanging post (108) of the outer shell (1). The positioning and turning hole (401) of the latch (4) is rotatably sleeved on the concentric cylinder (301) of the support member (3), the positioning hole (201) of the jump buckle (2) is rotatably sleeved on the third positioning post (307) of the support member (3), and the locking tongue (203) of the jump buckle (2) abuts against the locking platform (403) of the latch (4); The first plug (601) of the crankshaft (6) is inserted into the guide hole (704) of the handle (7), and the second plug (602) is inserted into the guide groove (302) of the support (3) after passing through the horn hole (402) of the latch (4), so that the second plug (602) of the crankshaft (6) moves in a specified direction in the guide groove (302); A second torsion spring (18) is installed in the annular cavity of the handle (7). The third pin (1801) of the second torsion spring (18) is inserted into the claw hook (702) of the handle (7). The fourth pin (1802) of the second torsion spring (18) is attached to the outer shell (1). The positioning guide hole (703) of the handle (7) is rotated and sleeved on the first positioning post (110) of the outer shell (1). The first pull ring (1901) of the tension spring (19) is hooked on the second hook post (104) of the outer shell (1), and the second pull ring (1902) is hooked on the anti-drop hook (304) of the support (3); The contact bracket (13) is slidably installed in the first rectangular guide groove (107) of the outer shell (1). The first moving contact (12) and the second moving contact (21) are respectively installed in the rectangular window (1306) of the contact bracket (13). A guide plate (1301) is provided between the two rectangular windows (1306) of the contact bracket (13). The top and bottom of the guide plate (1301) are provided with limiting posts (1302). A compression spring (17) is sleeved on the limiting post (1302) at the top of the guide plate (1301). The other end of the compression spring (17) abuts against the first convex positioning platform (1) of the first moving contact (12). On 202), a reaction spring is sleeved on the limiting post (1302) at the bottom of the guide plate (1301). The other end of the reaction spring abuts against the second convex positioning platform (1205) of the second moving contact (21). The bottom surfaces of the first moving contact (12) are respectively provided with first conical contact points (1203), and the top surfaces of the second moving contact (21) are respectively provided with second conical contact points (1204). The first moving contact (12) and the second moving contact (21) are arranged back to back, so that the first conical contact points (1203) and the second conical contact points (1204) on the first moving contact (12) and the second moving contact (21) are facing upwards and downwards respectively. The first insert (901) of the crank (9) is inserted into the hook-and-turn hole (701) of the handle (7), and the second insert (902) is inserted into the guide hole (1304) of the contact bracket (13); The first contact plate (1002) of the first stationary contact (10), the second contact plate (1102) of the second stationary contact (11), the third contact plate (1402) of the third stationary contact (14), and the fourth contact plate (1502) of the fourth stationary contact (15) are respectively snapped into the snap-fit ​​groove (105) of the housing (1). The tail portions of the first stationary contact (10), the second stationary contact (11), the third stationary contact (14), and the fourth stationary contact (15) are respectively snapped into the first quick-connect terminal (1003), the second quick-connect terminal (1103), the third quick-connect terminal (1403), and the fourth quick-connect terminal (1503). (1403) and the signal wire is snapped into the fourth quick-connect terminal (1503). The heads of the first stationary contact (10), the second stationary contact (11), the third stationary contact (14), and the fourth stationary contact (15) are respectively provided with a first contact (1001), a second contact (1101), a third contact (1401), and a fourth contact (1501). The first conical contact (1203) of the first moving contact (12) corresponds to the first contact (1001) of the first stationary contact (10) and the fourth contact (1501) of the fourth stationary contact (15). The second conical contact (1204) of the second moving contact (21) corresponds to the second contact (1101) of the second stationary contact (11) and the third contact (1401) of the third stationary contact (14). The cover plate (16) is provided with a second rectangular guide groove (1604), a limiting rib (1603) and a limiting riveting hole (1601) at the positions of the first rectangular guide groove (107), the snap-fit ​​groove (105) and the convex cylinder (103) of the outer shell (1). The cover plate (16) is provided with a hook (1606) on the outside. The two are snapped together by the cooperation of the convex cylinder (103) of the outer shell (1) and the limiting riveting hole (1601) of the cover plate (16). The contact bracket (13) is slidably disposed between the first rectangular guide groove (107) and the second rectangular guide groove (1604). The first stationary contact (10), the second stationary contact (11), the third stationary contact (14) and the fourth stationary contact (15) are snapped together and limited by the snap-fit ​​groove (105) and the limiting rib (1603). The jump buckle (2) has its jump buckle post (202) passing through the guide groove (1605) of the cover plate (16) and then inserted into the guide hole (2002) of the circuit breaker. The connecting pin (705) of the handle is inserted into the pin hole (2001) of the circuit breaker handle, and the hook (1606) of the cover plate (16) is hooked into the hook hole (2003) of the circuit breaker.

2. A dual-break auxiliary contact set for a circuit breaker according to claim 1, wherein: It also includes an indicator (5), which has a concentric cylindrical hole (502) and a fixing hole (503). The top of the indicator (5) has a two-color indicator strip (501). The concentric cylindrical hole (502) is rotatably sleeved on the positioning shaft (106) of the outer shell (1), and the fixing hole (503) is rotatably sleeved on the fourth positioning post (306) of the support (3). A viewing window (101) is opened on the outer shell (1) at the position corresponding to the two-color indicator strip (501) to display the connection and disconnection status.

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