Circuit breaker
By setting limiting projections and reset elastic parts in the circuit breaker, the handle stops at a specific position in the event of a fault, solving the problem that the user cannot identify whether the circuit breaker is opened due to a fault, and improving safety.
Patent Information
- Application Number
- CN202420546565.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-20
AI Technical Summary
After the existing circuit breaker is opened, the user cannot effectively identify whether the circuit breaker is opened due to a fault in the line, which poses a safety risk.
By setting the first limit projection and the second limit projection in the circuit breaker, the reset elastic member is limited so that the handle stops at the third position between the first position and the second position when the handle is opened in a fault condition, so as to determine the reason for the circuit breaker by identifying the handle position.
It realizes the determination of whether the circuit breaker is opened due to a fault by identifying the handle position, which improves the user's ability to identify the safety status and reduces the safety risk of the circuit when closing the circuit before the problem point is ruled out.
Smart Images
Figure CN222581074U_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. Background Art
[0002] The circuit breaker can automatically cut off the current when the current exceeds the trip setting. It has protection functions such as long delay for overload and instantaneous short circuit. It can also be used in conjunction with module units such as leakage current device, measurement, and electric operating mechanism.
[0003] The handle of a circuit breaker generally has two positions: open and closed. Regardless of whether the circuit breaker is opened by manually pulling the handle or the circuit breaker is unlocked due to a fault in the line as a protection function, the handle's open position is the same. After the circuit breaker is opened, the user cannot effectively identify whether the circuit breaker is opened due to a fault in the line. If the circuit breaker is opened due to a fault, closing the circuit before eliminating the problem in the circuit will pose a safety risk.
[0004] Therefore, it is urgent to improve the circuit breaker to solve the above problems. Utility Model Content
[0005] The utility model aims to provide a circuit breaker which can judge whether the circuit breaker is tripped due to faults such as current overload, short circuit or leakage in the circuit by identifying the position of the handle.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] Circuit breakers, including:
[0008] A base, wherein a first limiting protrusion and a second limiting protrusion are provided on the base;
[0009] A handle, the handle is rotatably disposed on the base, and the handle can be rotated to a first position and a second position, the handle is in the first position, the circuit breaker is in an open state, and the handle is in the second position, the circuit breaker is in a closed state;
[0010] A reset elastic member is arranged in the base, and both ends of the reset elastic member are movably arranged between the first limiting protrusion and the second limiting protrusion. The first end of the reset elastic member abuts against the first limiting protrusion, and the second end of the reset elastic member can move with the rotation of the handle. When the circuit breaker is opened due to a fault, the second limiting protrusion can block the second end of the reset elastic member to stop the handle at a third position between the first position and the second position.
[0011] As an optional solution, the reset elastic member is a compression torsion spring, a connecting shaft is provided on the base, the compression torsion spring is sleeved on the connecting shaft, the first end of the compression torsion spring abuts against the first limiting protrusion, and the second end of the compression torsion spring abuts against the second limiting protrusion, and when the handle rotates from the first position to the second position, the handle can push the second end to move in the direction of the first limiting protrusion.
[0012] As an optional solution, when the circuit breaker is opened under a fault condition, the handle rotates in the direction of the first position and is able to push the second end to move against the second limiting protrusion.
[0013] As an optional solution, the third position is located in the middle of the first position and the second position.
[0014] As an optional solution, the handle includes an operating portion and a connecting portion that are connected to each other, the connecting portion is rotatably sleeved on the connecting shaft, and the operating portion extends out of the base.
[0015] As an optional solution, the first limiting protrusion is arranged outside the connecting portion, a gap is arranged between the connecting portion and the base, and the first end extends out from the gap.
[0016] As an optional solution, the second limiting protrusion is arranged outside the connecting part, the second end passes through the connecting part and can abut against the second limiting protrusion, and a limiting member is arranged on the connecting part, and the limiting member is used to limit the relative movement of the second end and the connecting part.
[0017] As an optional solution, the limit member includes a first limit member and a second limit member arranged at an interval, and the second end is capable of moving between the first limit member and the second limit member. When the handle is in the first position, the second end is located between the first limit member and the second limit member. When the handle is in the second position and the third position, the second end abuts against the second limit member.
[0018] As an optional solution, a limiting groove is provided on the connecting portion, the second end passes through the limiting groove, a side wall of the limiting groove close to the first limiting protrusion forms the first limiting piece, and a side wall of the limiting groove close to the second limiting protrusion forms the second limiting piece.
[0019] As an optional solution, the circuit breaker further includes:
[0020] An operating mechanism is arranged in the base, and the operating mechanism is drivingly connected to the handle.
[0021] Beneficial effects:
[0022] The circuit breaker proposed by the utility model has the following characteristics: when the circuit breaker is normally opened and closed, the handle is pushed to the first position for opening, and the handle is pushed to the second position for closing. The reset elastic member is limited by setting the first limit protrusion and the second limit protrusion, so that the reset elastic member moves between the first limit protrusion and the second limit protrusion when the force is applied. When the circuit breaker is opened under fault conditions, the second limit protrusion blocks the second end of the reset elastic member, so that the handle stops rotating before rotating to the first position and stops at a third position between the first position and the second position. By identifying the position of the handle, the staff can determine whether the circuit breaker is opened due to a line fault or opened under normal working conditions. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of the circuit breaker proposed by the utility model when the handle is in the first position;
[0024] Figure 2 It is a structural schematic diagram of the circuit breaker proposed by the utility model when the handle is located at the third position;
[0025] Figure 3 It is a structural schematic diagram of the circuit breaker proposed by the utility model when the handle is located in the second position;
[0026] Figure 4 It is a partial structural schematic diagram of the circuit breaker proposed by the utility model.
[0027] In the figure:
[0028] 1. base; 11. first limiting protrusion; 12. second limiting protrusion; 13. connecting shaft;
[0029] 2. handle; 21. operating part; 22. connecting part; 221. first limiting member; 222. second limiting member; 223. limiting groove;
[0030] 3. Compression torsion spring; 31. First end; 32. Second end;
[0031] 4. Operating mechanism;
[0032] P1, first position; P2, second position; P3, third position. DETAILED DESCRIPTION
[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0036] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0037] like Figure 1-Figure 4 As shown, this embodiment proposes a circuit breaker, including a base 1, in which a handle 2 and an operating mechanism 4 are arranged, and the operating mechanism 4 is drivingly connected to the handle 2. The specific structure of the operating mechanism 4, the connection method of the operating mechanism 4 and the handle 2, and the driving principle are all mature technologies in the prior art and will not be repeated here.
[0038] In this embodiment, the structures of the base 1 and the handle 2 are mainly improved. Specifically, the base 1 is provided with a first limiting protrusion 11 and a second limiting protrusion 12. The handle 2 is rotatably arranged on the base 1, and the handle 2 can be rotated to a first position P1 and a second position P2. When the handle 2 is in the first position P1, the circuit breaker is in an open state; when the handle 2 is in the second position P2, the circuit breaker is in a closed state. The circuit breaker also includes a reset elastic member, which is arranged in the base 1, and the two ends of the reset elastic member are movably arranged between the first limiting protrusion 11 and the second limiting protrusion 12. The first end 31 of the reset elastic member abuts against the first limiting protrusion 11, and the second end 32 of the reset elastic member can move with the rotation of the handle 2. When the circuit breaker is opened under a fault condition (such as short circuit, overload, leakage, etc.), the second limiting protrusion 12 can block the second end 32 of the reset elastic member, so that the handle 2 stops at a third position P3 between the first position P1 and the second position P2.
[0039] When the circuit breaker is normally opened and closed, the handle 2 is pushed to the first position P1 for opening, and the handle 2 is pushed to the second position P2 for closing. The reset elastic member is limited by setting the first limit protrusion 11 and the second limit protrusion 12, so that the reset elastic member moves between the first limit protrusion 11 and the second limit protrusion 12 when the force is applied. When the circuit breaker is opened under fault conditions, the second limit protrusion 12 blocks the second end 32 of the reset elastic member, so that the handle 2 stops rotating before rotating to the first position P1, and stops at the third position P3 between the first position P1 and the second position P2. By identifying the position of the handle 2, the staff can determine whether the circuit breaker is opened due to a fault or opened under normal working conditions. Optionally, the third position P3 is located in the middle of the first position P1 and the second position P2. When the circuit breaker is opened due to a fault, the position change of the handle 2 is more obvious, so that the reason for the opening of the circuit breaker can be better determined.
[0040] After the overload, short circuit or leakage faults are eliminated, when the user needs to close the circuit breaker again, the handle 2 is reset from the third position P3 to the first position P1, and the circuit breaker can be closed normally again.
[0041] Specifically, the resetting elastic member is a compression torsion spring 3, a connecting shaft 13 is provided on the base 1, the compression torsion spring 3 is sleeved on the connecting shaft 13, the first end 31 of the compression torsion spring 3 abuts against the first limiting protrusion 11, and the second end 32 of the compression torsion spring 3 abuts against the second limiting protrusion 12, and when the handle 2 rotates from the first position P1 to the second position P2, the handle 2 can push the second end 32 to move in the direction of the first limiting protrusion 11. The compression torsion spring 3 is always in a compressed state, and when the handle 2 is in the first position P1, the pressure of the compression torsion spring 3 is relatively small, and when the handle 2 rotates to the second position P2, the pressure of the compression torsion spring 3 gradually increases.
[0042] When the circuit breaker is tripped under fault conditions, the handle 2 rotates toward the first position P1 and can push the second end 32 to move against the second limiting protrusion 12. During this process, the pressure of the compression torsion spring 3 gradually decreases, and due to the blocking of the second end 32 of the compression torsion spring 3 by the second limiting protrusion 12, the second end 32 cannot continue to rotate counterclockwise, so that the handle 2 cannot return to the tripping state of the first position P1, and the handle 2 rotates to the third position P3 between the first position P1 and the second position P2.
[0043] Alternatively, if Figure 1 As shown, the handle 2 includes an operating portion 21 and a connecting portion 22 connected to each other. The connecting portion 22 is rotatably sleeved on the connecting shaft 13 , and the operating portion 21 extends out of the base 1 to facilitate the rotation operation of the handle 2 through the operating portion 21 .
[0044] In order to facilitate the assembly of the compression torsion spring 3, as shown in FIG. Figure 1 As shown, the first limiting protrusion 11 is arranged outside the connecting part 22, and a gap is arranged between the connecting part 22 and the base 1. The first end 31 of the compression torsion spring 3 extends out of the gap, and the compression torsion spring 3 is inserted between the first limiting protrusion 11 and the second limiting protrusion 12 and abuts against the first limiting protrusion 11.
[0045] The second limiting protrusion 12 is also arranged outside the connecting part 22. The second end 32 of the compression torsion spring 3 passes through the connecting part 22 and can abut against the second limiting protrusion 12. A limiting member is arranged on the connecting part 22. The limiting member is used to limit the relative movement of the second end 32 and the connecting part 22, so that the connecting part 22 can push the second end 32 to rotate.
[0046] Specifically, Figure 4 As shown, the limiting member includes a first limiting member 221 and a second limiting member 222 which are spaced apart from each other, and the second end 32 can move between the first limiting member 221 and the second limiting member 222. When the handle 2 is in the first position P1, the second end 32 is located between the first limiting member 221 and the second limiting member 222. When the handle 2 is in the second position P2 and the third position P3, the second end 32 abuts against the second limiting member 222.
[0047] In order to form the first limiting member 221 and the second limiting member 222, as shown in FIG. Figure 4 As shown, a limiting groove 223 is provided on the connecting portion 22 , and the second end 32 passes through the limiting groove 223 . A side wall of the limiting groove 223 close to the first limiting protrusion 11 forms a first limiting member 221 , and a side wall of the limiting groove 223 close to the second limiting protrusion 12 forms a second limiting member 222 .
[0048] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A circuit breaker, characterized in that include: A base (1), wherein the base (1) is provided with a first limiting protrusion (11) and a second limiting protrusion (12); A handle (2), the handle (2) being rotatably disposed on the base (1), and the handle (2) being rotatable to a first position (P1) and a second position (P2); when the handle (2) is in the first position (P1), the circuit breaker is in an open state; when the handle is in the second position (P2), the circuit breaker is in a closed state; A reset elastic member is arranged in the base (1), and two ends of the reset elastic member are movably arranged between the first limiting protrusion (11) and the second limiting protrusion (12). The first end (31) of the reset elastic member abuts against the first limiting protrusion (11), and the second end (32) of the reset elastic member can move with the rotation of the handle (2). When the circuit breaker is opened in the event of a fault, the second limiting protrusion (12) can block the second end (32) of the reset elastic member, so that the handle (2) stops at a third position (P3) between the first position (P1) and the second position (P2).
2. The circuit breaker according to claim 1, characterized in that: The reset elastic member is a compression torsion spring (3). A connecting shaft (13) is provided on the base (1). The compression torsion spring (3) is sleeved on the connecting shaft (13). The first end (31) of the compression torsion spring (3) abuts against the first limiting protrusion (11), and the second end (32) of the compression torsion spring (3) abuts against the second limiting protrusion (12). When the handle (2) rotates from the first position (P1) to the second position (P2), the handle (2) can push the second end (32) to move in the direction of the first limiting protrusion (11).
3. The circuit breaker according to claim 2, characterized in that: When the circuit breaker is tripped in the event of a fault, the handle (2) rotates in the direction of the first position (P1) and is able to push the second end (32) to move against the second limiting protrusion (12).
4. The circuit breaker according to claim 1, characterized in that: The third position (P3) is located at an intermediate position between the first position (P1) and the second position (P2).
5. The circuit breaker according to claim 2, characterized in that: The handle (2) comprises an operating portion (21) and a connecting portion (22) which are connected to each other. The connecting portion (22) is rotatably sleeved on the connecting shaft (13), and the operating portion (21) extends out of the base (1).
6. The circuit breaker according to claim 5, characterized in that: The first limiting protrusion (11) is arranged outside the connecting portion (22), a gap is arranged between the connecting portion (22) and the base (1), and the first end (31) protrudes from the gap.
7. The circuit breaker according to claim 5, characterized in that: The second limiting protrusion (12) is arranged outside the connecting portion (22), the second end (32) passes through the connecting portion (22) and can abut against the second limiting protrusion (12), and a limiting member is arranged on the connecting portion (22), and the limiting member is used to limit the relative movement between the second end (32) and the connecting portion (22).
8. The circuit breaker according to claim 7, characterized in that: The limiting member comprises a first limiting member (221) and a second limiting member (222) which are arranged at an interval; the second end (32) is capable of moving between the first limiting member (221) and the second limiting member (222); when the handle (2) is at the first position (P1), the second end (32) is located between the first limiting member (221) and the second limiting member (222); when the handle (2) is at the second position (P2) and the third position (P3), the second end (32) abuts against the second limiting member (222).
9. The circuit breaker according to claim 8, characterized in that A limiting groove (223) is provided on the connecting portion (22), and the second end (32) passes through the limiting groove (223). A side wall of the limiting groove (223) close to the first limiting protrusion (11) forms the first limiting member (221), and a side wall of the limiting groove (223) close to the second limiting protrusion (12) forms the second limiting member (222).
10. The circuit breaker according to any one of claims 1 to 9, characterized in that: The circuit breaker further comprises: An operating mechanism (4) is arranged in the base (1), and the operating mechanism (4) is drivingly connected to the handle (2).