Circuit breaker with auxiliary contact
By designing an auxiliary contact mechanism in the circuit breaker, the conductive circuit of the control circuit board is on and off, which solves the problem of continuous power on the circuit board caused by reverse circuit connection, extends the service life and ensures normal power supply.
Patent Information
- Application Number
- CN202421698570.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-17
AI Technical Summary
Existing leakage circuit breakers are prone to circuit reversal problems when users connect to live wires, resulting in the circuit board being always powered on, shortening the service life, and may cause burning in overvoltage situations.
A circuit breaker with auxiliary contacts is designed to control the on and off of the conductive circuit where the circuit board is located through the auxiliary contact mechanism. When the circuit breaker is in the open state, the auxiliary contacts are separated and disconnected to ensure that the circuit board is in the disconnected state; when the circuit breaker is closed, the auxiliary contacts are in contact and powered to the circuit board.
It effectively avoids the continuous power-on problem of circuit reverse connection, extends the service life of the circuit board, and ensures normal power supply of the circuit board in the closed state, avoids overvoltage burning.
Smart Images
Figure CN222785246U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a circuit breaker with auxiliary contacts. Background Art
[0002] The residual leakage circuit breaker includes a housing, an incoming terminal, an outgoing terminal and a circuit board for detecting leakage. The circuit board is connected to the outgoing terminal. During normal wiring, the live wire is connected to the incoming terminal, so that the current will pass through the circuit board only after the circuit breaker is closed. However, in actual use, some users have a problem of reverse connection when connecting the live wire, that is, the live wire is connected from the outgoing terminal and connected from the incoming terminal. This situation makes the circuit board always powered on, which will shorten the life of the circuit board and burn the circuit board in some special cases (such as overvoltage). Utility Model Content
[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, thereby providing a circuit breaker with auxiliary contacts that can only be connected after the current is closed.
[0004] To this end, the utility model provides a circuit breaker with auxiliary contacts, including a housing, an operating mechanism, an auxiliary contact mechanism, a circuit board, an incoming terminal and an outgoing terminal, wherein the circuit board is electrically connected to the outgoing terminal, and the auxiliary contact mechanism is used to control the on and off of the conductive circuit where the circuit board is located, and comprises: a first auxiliary contact, fixed on a flap, and electrically connected to the circuit board; a second auxiliary contact, abutting against the flap through a first elastic member, one end of the first elastic member being electrically connected to the incoming terminal, and the other end applying an elastic force against the flap toward the second auxiliary contact; a flap, rotatably mounted in the housing , having a first flap portion and a second flap portion located on both sides of its rotation center, the first flap portion can cooperate with the second auxiliary contact, the second flap portion can cooperate with the moving contact frame of the operating mechanism, the flap has a first position corresponding to the opening of the circuit breaker, and a second position corresponding to the closing of the circuit breaker, wherein, in the first position, the limit block of the moving contact frame abuts against the second flap portion, and the second auxiliary contact is separated and disconnected from the first auxiliary contact; in the second position, the limit block of the moving contact frame is separated from the second flap portion, and the second auxiliary contact is in contact and connected with the first auxiliary contact.
[0005] The flap is formed with an installation groove for installing the first auxiliary contact, a limiting groove for the first auxiliary contact to be inserted is formed on one side wall of the installation groove, and a hook fixed to the first auxiliary contact hook is provided on the other side wall.
[0006] The first elastic member is a torsion spring having a first torsion spring body, and a first elastic arm and a second elastic arm extending toward two sides, wherein the second elastic arm abuts against the second auxiliary contact.
[0007] An overcurrent tripping mechanism is arranged in the shell, and the overcurrent tripping mechanism comprises a yoke or a coil electrically connected to the incoming terminal, and the yoke or the coil is connected to the first elastic arm.
[0008] The first auxiliary contact is connected to the circuit board via a second elastic member and a wire.
[0009] The second elastic member is a torsion spring having a second torsion spring body, and a third elastic arm and a fourth elastic arm extending toward both sides, the third elastic arm elastically abuts against the first auxiliary contact, the fourth elastic arm abuts against the inner wall of the shell and is welded to the wire.
[0010] The flap is provided with a limiting column which abuts against the side of the second auxiliary contact.
[0011] The flap has a first pivot axis and a second pivot axis, and are respectively pivotally disposed in the housing.
[0012] The technical solution of the utility model has the following advantages:
[0013] 1. The utility model provides a circuit breaker with auxiliary contacts, wherein the auxiliary contact mechanism comprises a first auxiliary contact, a second auxiliary contact, a first elastic member and a flap, the flap being rotatably installed in a housing, and comprising a first flap portion and a second flap portion located on both sides of its rotation center, the first flap portion being capable of cooperating with the second auxiliary contact, and the second flap portion being capable of cooperating with a moving contact frame of an operating mechanism, when the circuit breaker is in an opening state, a limit block of the moving contact frame abuts against the second flap portion, and the second auxiliary contact is separated and disconnected from the first auxiliary contact, so that regardless of whether the live wire is connected reversely, the conductive circuit where the circuit board is located is always in a disconnected state, thereby ensuring the service life of the circuit board; when the circuit breaker is closed, the limit block of the moving contact frame is separated from the second flap portion, and the second auxiliary contact drives the first flap portion to rotate under the elastic force of the first elastic member, thereby contacting and connecting with the first auxiliary contact, thereby supplying power to the circuit board, and the above-mentioned auxiliary contact mechanism has the advantages of simple structure and convenient operation.
[0014] 2. The utility model provides a circuit breaker with auxiliary contacts, and the flap is formed with an installation groove for installing the first auxiliary contact, and a limiting groove for the first auxiliary contact to be inserted is formed on one side wall of the installation groove, and a hook fixed to the first auxiliary contact hook is provided on the other side wall. The limiting groove and the hook make the first auxiliary contact and the flap assembled more firmly.
[0015] 3. The utility model provides a circuit breaker with auxiliary contacts, wherein the first elastic member is a torsion spring, which has a first torsion spring body, and a first elastic arm and a second elastic arm extending toward both sides, wherein the second elastic arm abuts against the second auxiliary contact, and the first elastic arm is connected to a yoke or a coil, so that the first elastic member can not only exert an elastic force on the second auxiliary contact, but also make the second auxiliary contact conductively connected to the yoke or the coil, so that the structure is simpler and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 It is a structural schematic diagram of the circuit breaker of the utility model;
[0018] Figure 2 for Figure 1 Schematic diagram of the structure after removing the shell;
[0019] Figure 3 is a first stereoscopic view of the auxiliary contact mechanism;
[0020] Figure 4 is a second stereoscopic view of the auxiliary contact mechanism;
[0021] Figure 5 is a cross-sectional view of the flap and the first auxiliary contact;
[0022] Figure 6 It is a three-dimensional diagram of the short-circuit tripping mechanism, the auxiliary contact mechanism and the circuit board;
[0023] Figure 7 for Figure 6 A partially enlarged structural schematic diagram;
[0024] Figure 8 This is a circuit diagram of a circuit breaker.
[0025] Explanation of the accompanying drawings: 1. Shell; 2. Operating mechanism; 3. Auxiliary contact mechanism; 4. Circuit board; 5. Incoming terminal; 6. Outgoing terminal; 7. First auxiliary contact; 8. Flip plate; 9. Second auxiliary contact; 10. First elastic member; 11. First flap portion; 12. Second flap portion; 13. Moving contact frame; 14. Limit block; 15. Mounting groove; 16. Limit groove; 17. Hook; 18. First torsion spring body; 19. First elastic arm; 20. Second elastic arm; 21. Overcurrent release mechanism; 22. Yoke; 23. Coil; 24. Second elastic member; 25. Wire; 26. Second torsion spring body; 27. Third elastic arm; 28. Fourth elastic arm; 29. Limit column; 30. Knob; 31. First pivot axis; 32. Second pivot axis. DETAILED DESCRIPTION
[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.
[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0030] Example
[0031] This embodiment provides a circuit breaker with auxiliary contacts, such as Figure 1 As shown, it includes a housing 1, an operating mechanism 2, an auxiliary contact mechanism 3, a circuit board 4, an incoming terminal 5 and an outgoing terminal 6.
[0032] The housing 1 has an input terminal 5 and an output terminal 6 on its left and right sides respectively. The circuit board 4 is adjacent to the output terminal 6 and is electrically connected to the output terminal 6 .
[0033] Auxiliary contact mechanism 3, such as Figure 8 As shown, it is used to control the on / off of the conductive circuit where the circuit board 4 is located. The auxiliary contact mechanism 3 includes a first auxiliary contact 7, a second auxiliary contact 9, a first elastic member 10 and a flap 8.
[0034] The first auxiliary contact 7 is fixed on the flap 8 and is electrically connected to the circuit board 4. Figure 6 and Figure 7 As shown, the first auxiliary contact 7 is connected to the circuit board 4 through the second elastic member 24 and the wire 25. The second elastic member 24 is a torsion spring, which has a second torsion spring body 26, and a third elastic arm 27 and a fourth elastic arm 28 extending to both sides. The third elastic arm 27 elastically abuts against the first auxiliary contact 7, and the fourth elastic arm 28 abuts against the inner wall of the housing 1 and is welded to the wire 25. It should be noted that since the first auxiliary contact 7 will swing with the flap 8, if the first auxiliary contact 7 is directly connected to the circuit board 4 through the wire 25, the end of the wire 25 welded to the first auxiliary contact 7 may break after the flap 8 swings for a long time, shortening the service life. The second elastic member 24 adopts the torsion spring method, so that the third elastic arm 27 always elastically abuts against the first auxiliary contact 7, and the second elastic member 24 plays a conductive role, thereby ensuring the reliability of conductive.
[0035] As an alternative implementation, the first auxiliary contact 7 can be directly electrically connected to the circuit board 4 through the wire 25 .
[0036] The second auxiliary contact 9 is in contact with the flap 8 via a first elastic member 10. One end of the first elastic member 10 is electrically connected to the incoming terminal 5, and the other end of the first elastic member 10 applies an elastic force against the flap 8 to the second auxiliary contact 9. In this embodiment, the first elastic member 10 is a torsion spring, such as Figure 2 and Figure 3As shown, the torsion spring has a first torsion spring body 18, and a first elastic arm 19 and a second elastic arm 20 extending toward both sides, the second elastic arm 20 abuts against the second auxiliary contact 9, an overcurrent tripping mechanism 21 is provided in the housing 1, and the overcurrent tripping mechanism 21 includes a yoke 22 or a coil 23 electrically connected to the incoming terminal 5, and the yoke 22 or the coil 23 is connected to the first elastic arm 19. In this embodiment, a mounting column (not shown) is provided in the housing 1, and the first torsion spring body 18 and the C-shaped member at one end of the second auxiliary contact 9 are both sleeved on the mounting column.
[0037] As a convertible implementation, the first elastic arm 19 is connected to the incoming terminal 5 via a wire.
[0038] The flap 8 is rotatably mounted in the housing 1. Figure 3 , Figure 4 As shown, it has a first flap portion 11 and a second flap portion 12 located on both sides of its rotation center, the first flap portion 11 can cooperate with the second auxiliary contact 9, the second flap portion 12 can cooperate with the moving contact frame 13 of the operating mechanism 2, and the flap 8 has a first position corresponding to the circuit breaker opening, and a second position corresponding to the circuit breaker closing, wherein, in the first position, the limit block 14 of the moving contact frame 13 abuts against the second flap portion 12, and the second auxiliary contact 9 is separated and disconnected from the first auxiliary contact 7; in the second position, the limit block 14 of the moving contact frame 13 is separated from the second flap portion 12, and the second auxiliary contact 9 is in contact and connected with the first auxiliary contact 7. Figure 5 As shown, the flap 8 is formed with a mounting groove 15 for mounting the first auxiliary contact 7, a limiting groove 16 for the first auxiliary contact 7 to be inserted is formed on one side wall of the mounting groove 15, and a hook 17 for being fixed with the first auxiliary contact 7 is provided on the other side wall. Figure 3 As shown, a limiting column 29 abutting against the side of the second auxiliary contact 9 is provided on the flap 8 , and the flap 8 has a first pivot axis 31 and a second pivot axis 32 , which are pivotally disposed in the housing 1 respectively.
[0039] The utility model provides a circuit breaker with auxiliary contacts, wherein the auxiliary contact mechanism 3 includes a first auxiliary contact 7, a second auxiliary contact 9, a first elastic member 10 and a flap 8, wherein the flap 8 is rotatably mounted in the housing 1, and has a first flap portion 11 and a second flap portion 12 located on both sides of the rotation center thereof, wherein the first flap portion 11 can cooperate with the second auxiliary contact 9, and the second flap portion 12 can cooperate with a moving contact frame 13 of the operating mechanism 2, and when the circuit breaker is in the open state, a limit block 14 of the moving contact frame 13 abuts against the second flap portion 12, and the second auxiliary contact 9 abuts against the first auxiliary contact 9. The auxiliary contact 7 is separated and disconnected, so that no matter whether the live wire is connected reversely, the conductive circuit where the circuit board 4 is located is always in a disconnected state, thereby ensuring the service life of the circuit board; when the circuit breaker is closed, the moving contact frame 13 rotates clockwise under the push of the knob 30, and the limit block 14 is separated from the second flap part 12. The second auxiliary contact 9 drives the first flap part 11 to rotate counterclockwise under the elastic force of the first elastic member 10, thereby contacting and connecting with the first auxiliary contact 7, thereby supplying power to the circuit board 4. The above-mentioned auxiliary contact mechanism has the advantages of simple structure and easy operation.
[0040] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.
Claims
1. A circuit breaker with auxiliary contacts, characterized in that: The invention comprises a housing (1), an operating mechanism (2), an auxiliary contact mechanism (3), a circuit board (4), an input terminal (5) and an output terminal (6), wherein the circuit board (4) is electrically connected to the output terminal (6), and the auxiliary contact mechanism (3) is used to control the on / off of a conductive circuit in which the circuit board (4) is located. The invention comprises: A first auxiliary contact (7) is fixed on the flap (8) and is electrically connected to the circuit board (4); A second auxiliary contact (9) is abutted against the flap (8) via a first elastic member (10), one end of the first elastic member (10) being electrically connected to the incoming terminal (5), and the other end of the first elastic member (10) applying an elastic force against the flap (8) toward the second auxiliary contact (9); A flap (8) is rotatably mounted in a housing (1), and comprises a first flap portion (11) and a second flap portion (12) located on both sides of its rotation center, wherein the first flap portion (11) can cooperate with the second auxiliary contact (9), and the second flap portion (12) can cooperate with the moving contact frame (13) of the operating mechanism (2), and the flap (8) has a first position corresponding to the opening of the circuit breaker, and a second position corresponding to the closing of the circuit breaker, wherein, in the first position, the limit block (14) of the moving contact frame (13) abuts against the second flap portion (12), and the second auxiliary contact (9) is separated and disconnected from the first auxiliary contact (7); in the second position, the limit block (14) of the moving contact frame (13) is separated from the second flap portion (12), and the second auxiliary contact (9) is in contact and connected with the first auxiliary contact (7).
2. The circuit breaker with auxiliary contacts according to claim 1, characterized in that: The flap (8) is formed with a mounting groove (15) for mounting the first auxiliary contact (7); a limiting groove (16) for the first auxiliary contact (7) to be inserted is formed on one side wall of the mounting groove (15); and a hook (17) for fixing the first auxiliary contact (7) with a hook is provided on the other side wall.
3. The circuit breaker with auxiliary contacts according to claim 1 or 2, characterized in that: The first elastic member (10) is a torsion spring having a first torsion spring body (18), and a first elastic arm (19) and a second elastic arm (20) extending toward two sides, wherein the second elastic arm (20) abuts against the second auxiliary contact (9).
4. The circuit breaker with auxiliary contacts according to claim 3, characterized in that: An overcurrent release mechanism (21) is provided in the housing (1), and the overcurrent release mechanism (21) comprises a yoke (22) or a coil (23) electrically connected to the incoming terminal (5), and the yoke (22) or the coil (23) is connected to the first elastic arm (19).
5. The circuit breaker with auxiliary contacts according to claim 1, characterized in that: The first auxiliary contact (7) is connected to the circuit board (4) via a second elastic member (24) and a wire (25).
6. The circuit breaker with auxiliary contacts according to claim 5, characterized in that: The second elastic member (24) is a torsion spring, which has a second torsion spring body (26), and a third elastic arm (27) and a fourth elastic arm (28) extending toward both sides, wherein the third elastic arm (27) elastically abuts against the first auxiliary contact (7), and the fourth elastic arm (28) abuts against the inner wall of the housing (1) and is welded to the wire (25).
7. The circuit breaker with auxiliary contacts according to claim 1, characterized in that: The flap (8) is provided with a limiting column (29) which abuts against the side of the second auxiliary contact (9).
8. The circuit breaker with auxiliary contacts according to claim 1, characterized in that: The flap (8) has a first pivot axis (31) and a second pivot axis (32), and are respectively pivotally disposed in the housing (1).