Earth leakage protection module of circuit breaker

Abstract

An earth leakage protection module of a circuit breaker, comprising a handle (11), a contact frame (12), a latch (13), a leakage indicator (14), a torsion spring (15), a tripping latch (16), a U-shaped bar (17), a leakage releaser (18), a releasing bar (19) rotatably provided in a housing (10) and being in linkage fit with the leakage releaser (18), and a reset member (20) rotatably provided in the housing (10) and located between the releasing bar (19) and the latch (13), wherein an arc-shaped protrusion (201) matched with the releasing bar (19) is provided at one end of the reset member (20); the releasing bar (19) moves along with an ejector bar (181) of the leakage releaser (18) and abuts against the arc-shaped protrusion (201), thereby forming a linkage fit between the reset member (20) and the releasing bar (19); a load-bearing inclined surface (202) matched with the latch (13) is provided at the other end of the reset member (20); and an arc-shaped boss (131) abutting against the load-bearing inclined surface (202) is provided at one end of the latch (13). The earth leakage protection module of the circuit breaker has the advantages of simple structure, stable and reliable performance, sensitive releasing action and convenient assembly.

Description

A leakage protection module for circuit breaker Technical Field

[0001] The utility model relates to the technical field of circuit breakers, and in particular to a leakage protection module of a circuit breaker. Background Art

[0002] Currently, miniature circuit breakers, also known as miniature circuit breakers, are suitable for overload and short-circuit protection of AC 50 / 60Hz circuits with a rated voltage of 230 / 400V and a rated current not exceeding 125A. They can also be used for infrequent line switching under normal circumstances. Miniature circuit breakers are primarily used in various locations, including industrial, commercial, high-rise, and residential buildings. A miniature leakage circuit breaker is a switch that automatically activates when the leakage current in a circuit exceeds a predetermined value, protecting personnel and electrical equipment. A miniature leakage circuit breaker comprises multiple L-line circuit breaker units and an N-line leakage protection module assembled with these units. The N-line leakage protection module in existing miniature leakage circuit breakers has a complex structural design, and the tripping force of the tripping rod is unstable, resulting in unreliable tripping performance and insensitive leakage tripping. Summary of the Invention

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a leakage protection module for a circuit breaker with a simple structure, stable and reliable performance, sensitive tripping action, and convenient assembly.

[0004] To achieve the above-mentioned object, the utility model adopts a leakage protection module for a circuit breaker, characterized in that it includes: a handle rotatably arranged in a housing, a contact frame rotatably arranged in the housing, a lock rotatably arranged on the contact frame, a leakage indicator rotatably arranged on the contact frame, a torsion spring arranged between the lock and the leakage indicator, a tripping catch rotatably arranged on the contact frame and cooperating with the lock, a U-shaped rod connected between the handle and the tripping catch, a leakage release arranged in the housing, a tripping rod rotatably arranged in the housing and cooperating with the leakage release, and a reset member rotatably arranged in the housing between the tripping rod and the lock, wherein one end of the reset member has an arcuate protrusion cooperating with the tripping rod, the tripping rod moves with the top rod of the leakage release and abuts against the arcuate protrusion, thereby forming a cooperating relationship between the reset member and the tripping rod, the other end of the reset member has a load-bearing inclined surface cooperating with the lock, and one end of the lock is provided with an arcuate boss abutting against the load-bearing inclined surface.

[0005] The beneficial effects of the above structure are: the tripping rod, reset member, lock, and tripping catch adopt a connecting rod structure design, thereby ensuring that the tripping torque of the leakage protection module is evenly distributed and the tripping force is more reliable. The reset member is provided with a curved raised portion that cooperates with the tripping rod, and the tripping rod can abut against the curved raised portion, ensuring that the tripping rod can reliably drive the reset member. The load-bearing inclined surface of the reset member abuts against the curved boss of the reset member, thereby ensuring more reliable transmission between the reset member, the tripping member, and the lock, and more flexible operation. As a result, the leakage protection module of the miniature circuit breaker has the advantages of simple structure, stable and reliable performance, and sensitive tripping action.

[0006] Specifically, the trip lever has a driving surface on one side that mates with the arcuate raised portion, and a linkage surface on the other side that contacts the push rod of the residual current release. The trip lever's driving surface contacts the arcuate raised portion of the reset element, preventing any jamming or blocking between the driving surface and the arcuate raised portion. This ensures that the trip lever can reliably drive the reset element, and provides more flexible transmission between the trip lever and the reset element.

[0007] In particular, the trip lever has a positioning hole at one end, and a positioning shaft is provided within the housing to mate with the positioning hole. The positioning shaft is inserted into the positioning hole and forms a rotational connection between the trip lever and the positioning shaft. The trip lever is connected to the positioning shaft of the housing, thereby facilitating assembly of the trip lever and the housing and ensuring flexible movement of the trip lever.

[0008] In particular, the upper cover of the leakage release is covered with a shielding cover. The shielding cover plays a role in shielding interference signals, thereby facilitating the improvement of the working reliability of the leakage protection module of the circuit breaker.

[0009] In particular, the contact frame is provided with two positioning posts corresponding to the lock catch and the trip catch, respectively. These two positioning posts are inserted into the through holes of the lock catch and the trip catch, respectively, and form a rotational connection between the lock catch and the trip catch and the two positioning posts. The contact frame is connected to the lock catch and the trip catch via the positioning posts, thereby facilitating assembly of the contact frame, the lock catch, and the trip catch, and improving assembly efficiency.

[0010] Specifically, a pin is provided within the housing at locations corresponding to the contact frame and leakage indicator. The pin is inserted into the rotational axis holes of the contact frame and leakage indicator, and provides a rotational connection between the contact frame, leakage indicator, and the pin. The pin connects the contact frame and leakage indicator to the housing, facilitating assembly of the contact frame, leakage indicator, and housing, improving assembly efficiency and ensuring reliable rotation of the contact frame and leakage indicator on the pin.

[0011] In particular, the reset member is provided with a positioning shaft hole in its central portion, and the housing is provided with a positioning shaft inserted into the positioning shaft hole, thereby forming a rotatable connection between the reset member and the positioning shaft. The reset member is rotatably mounted on the positioning shaft within the housing, thereby facilitating assembly of the reset member and the positioning shaft, improving assembly efficiency, and ensuring that the reset member can flexibly rotate on the positioning shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a diagram showing the internal structure of an embodiment of the present utility model.

[0013] FIG2 is a front view of the internal structure of an embodiment of the present utility model.

[0014] FIG3 is a perspective view of an embodiment of the present utility model. DETAILED DESCRIPTION

[0015] As shown in Figures 1 to 3, an embodiment of the present invention is a leakage protection module for a circuit breaker, comprising a handle 11 rotatably disposed within a housing 10, a contact frame 12 rotatably disposed within the housing 10, a lock 13 rotatably disposed on the contact frame 12, a leakage indicator 14 rotatably disposed on the contact frame 12, a torsion spring 15 disposed between the lock 13 and the leakage indicator 14, a tripping latch 16 rotatably disposed on the contact frame 12 and cooperating with the lock 13, a U-shaped rod 17 connected between the handle 11 and the tripping latch 16, a leakage release 18 disposed within the housing 10, a tripping rod 19 rotatably disposed within the housing 10 and cooperating with the leakage release 18, and a reset member 20 rotatably disposed within the housing 10 between the tripping rod 19 and the lock 13. The reset member 20 One end of the trip rod 19 has a curved raised portion 201 that mates with the trip rod 19. The trip rod 19 moves with the push rod 181 of the residual current release 18 and contacts the curved raised portion 201, forming a linkage between the reset member 19 and the trip rod 20. The other end of the reset member 20 has a load-bearing inclined surface 202 that mates with the lock catch 13. One end of the lock catch 13 is provided with a curved boss 131 that contacts the load-bearing inclined surface 202. One side of the trip rod 19 is provided with a driving surface 191 that mates with the curved raised portion 201. The other side of the trip rod 19 is provided with a linkage surface 192 that contacts the push rod 181 of the residual current release 18. The driving plane of the tripping rod contacts the arc-surface raised portion of the reset member, thereby preventing the driving plane and the arc-surface raised portion from being stuck or jammed, thereby ensuring that the tripping rod can reliably drive the reset member to operate, and making the transmission between the tripping rod and the reset member more flexible.

[0016] As shown in Figures 1 and 2, the trip rod 19 has a positioning hole 193 at one end. A positioning shaft 101 is provided within the housing 10, which mates with the positioning hole 193. The positioning shaft 101 extends through the positioning hole 193 and forms a rotational connection between the trip rod 19 and the positioning shaft 101. The trip rod is connected to the positioning shaft of the housing, facilitating assembly of the trip rod and the housing while ensuring flexible operation. The residual current release 18 is covered with a shielding cover 21. This shielding cover shields interference signals, thereby enhancing the reliability of the residual current protection module of the circuit breaker.

[0017] As shown in Figures 2 and 3, two positioning posts 121 are provided within the contact frame 12, corresponding to the lock catch 13 and the trip catch 16, respectively. These two positioning posts 121 are inserted into the through-holes of the lock catch 13 and the trip catch 16, respectively, and constitute a rotational connection between the lock catch 13 and the trip catch 16 and the two positioning posts 121. The contact frame is connected to the lock catch and the trip catch via the positioning posts, which facilitates assembly of the contact frame, the lock catch, and the trip catch, and improves assembly efficiency. A pin 102 is provided within the housing 10, corresponding to the contact frame 12 and the leakage indicator 14. These pins 102 are inserted into the rotational shaft holes 120 of the contact frame 12 and the leakage indicator 14, and constitute a rotational connection between the contact frame 12, the leakage indicator 14, and the pin 102. The contact frame and leakage indicator are connected to the housing via a pin, facilitating assembly of the contact frame, leakage indicator, and housing, improving assembly efficiency and ensuring reliable rotation of the contact frame and leakage indicator on the pin. The reset member 20 is provided with a positioning shaft hole 203 in its center. The housing 10 is provided with a positioning shaft 103 that penetrates into the positioning shaft hole 203, forming a rotatable connection between the reset member 20 and the positioning shaft 103. The reset member is rotatably mounted on the positioning shaft within the housing, facilitating assembly of the reset member and the positioning shaft, improving assembly efficiency, and ensuring flexible rotation of the reset member on the positioning shaft.

[0018] The trip rod, reset member, lock, and trip latch utilize a linked rod design, ensuring a balanced distribution of the tripping torque of the leakage protection module and a more reliable tripping force. The reset member is provided with an arcuate raised portion that mates with the trip rod. The trip rod abuts against the arcuate raised portion, ensuring that the trip rod can reliably drive the reset member. The load-bearing inclined surface of the reset member abuts against the arcuate boss of the reset member, ensuring more reliable transmission and more flexible operation between the reset member, the trip member, and the lock latch. Consequently, this leakage protection module for a miniature circuit breaker offers the advantages of a simple structure, stable and reliable performance, and a sensitive tripping action.

Claims

1. A leakage protection module for a circuit breaker, characterized in that The invention comprises a handle rotatably arranged in a housing, a contact frame rotatably arranged in the housing, a lock rotatably arranged on the contact frame, a leakage indicator rotatably arranged on the contact frame, a torsion spring arranged between the lock and the leakage indicator, a tripping buckle rotatably arranged on the contact frame and matched with the lock, a U-shaped rod connected between the handle and the tripping buckle, a leakage releaser arranged in the housing, a tripping rod rotatably arranged in the housing and linked with the leakage releaser, and a reset member rotatably arranged in the housing between the corresponding tripping rod and the lock, wherein one end of the reset member has an arc-surface protrusion matched with the tripping rod, the tripping rod moves with the top rod of the leakage releaser and contacts the arc-surface protrusion, and forms a linkage cooperation between the reset member and the tripping rod, the other end of the reset member has a load-bearing inclined surface matched with the lock, and one end of the lock is provided with an arc-surface boss that contacts the load-bearing inclined surface.

2. The leakage protection module of the circuit breaker according to claim 1 or 2, characterized in that A driving plane matching the arc-surface protrusion is arranged on one side of the tripping rod, and a linkage plane abutting against the push rod of the leakage releaser is arranged on the other side of the tripping rod.

3. The leakage protection module of the circuit breaker according to claim 1 or 2, characterized in that One end of the tripping rod is provided with a positioning hole, and a positioning shaft matching the positioning hole is arranged in the shell. The positioning shaft is inserted into the positioning hole and constitutes a rotational connection between the tripping rod and the positioning shaft.

4. The leakage protection module of the circuit breaker according to claim 1 or 2, characterized in that The upper cover of the leakage release is covered with a shielding cover.

5. The leakage protection module of the circuit breaker according to claim 1 or 2, characterized in that Two positioning posts are respectively arranged at the corresponding lock buckle and jump buckle in the contact frame, and the two positioning posts are respectively inserted into the through holes of the lock buckle and jump buckle, and constitute the rotational connection cooperation between the lock buckle, the jump buckle and the two positioning posts.

6. The leakage protection module of the circuit breaker according to claim 1 or 2, characterized in that A pin is arranged in the shell at positions corresponding to the contact frame and the leakage indicator. The pin is inserted into the rotating shaft holes of the contact frame and the leakage indicator, and forms a rotational connection between the contact frame, the leakage indicator and the pin.

7. The leakage protection module of the circuit breaker according to claim 1 or 2, characterized in that A positioning shaft hole is arranged on the middle of the reset member, and a positioning shaft inserted into the positioning shaft hole is arranged in the shell, so that the reset member and the positioning shaft are rotatably connected and matched.

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