breaker

Abstract

A circuit breaker includes a housing and an operating mechanism disposed within the housing. An electromagnetic tripper with an indication function is disposed on one side of the operating mechanism. The electromagnetic tripper has a limiting structure. The movable iron core of the electromagnetic tripper can move up and down. One end of the movable iron core serves as an operating portion to trip the operating mechanism and cut off the circuit. The other end of the movable iron core is provided with an indicator. The indicator can pass through the housing as the movable iron core moves and remains in the state of passing through the housing under the action of the limiting structure. The indicator of the circuit breaker of the present invention is mounted on the movable iron core of the electromagnetic tripper and passes through the housing as the movable iron core moves up and down. The indicator remains in the state of passing through the housing under the action of the limiting structure, indicating that the opening of the circuit breaker is caused by leakage or a specific fault and requires manual return to the position for closing, thereby preventing human error and facilitating the use of the product.

Description

Technical Field

[0001] The present invention relates to a circuit protector, in particular to a circuit breaker. Background Art

[0002] Circuit breakers offer overload, short-circuit, and leakage protection, primarily ensuring electrical safety and protecting personnel from electric shock in the event of a circuit fault. Demand for compact residual current operated circuit breakers is increasing due to safety and space conservation considerations. Compared to conventional circuit breakers, compact residual current operated circuit breakers contain additional components, such as circuit boards, transformers, and shunt coils. However, due to the limited space within the housing, the large number of components makes it difficult to install leakage or other fault indicators. When a circuit breaker trips due to a fault, maintenance personnel without leakage or other fault indicators cannot determine the cause of the trip, making troubleshooting difficult. Furthermore, circuit breakers with leakage indicators lack a mechanism to prevent misoperation, making it easy for human operators to accidentally connect the circuit, posing a safety threat to maintenance personnel. This makes it difficult to determine the cause of the tripping of existing compact residual current operated circuit breakers, making them difficult to use. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a circuit breaker with simple structure and high reliability.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A circuit breaker includes a housing and an operating mechanism disposed within the housing. An electromagnetic tripper with an indicator function is disposed on one side of the operating mechanism. The electromagnetic tripper has a limit structure. A movable iron core of the electromagnetic tripper can move up and down. One end of the movable iron core serves as an operating portion, which is used to trip a lock of the operating mechanism to disconnect the circuit. An indicator is disposed on the other end of the movable iron core. When the electromagnetic tripper is actuated, the indicator follows the movement of the movable iron core to pass through the housing and remains in this position under the action of the limit structure.

[0006] Furthermore, the electromagnetic release includes a static iron core, a moving iron core and a spring arranged in a coil frame, a coil wound on the coil frame and a limiting structure arranged outside the coil frame; the static iron core and the moving iron core are respectively arranged at the two ends of the coil frame, the spring is arranged between the static iron core and the moving iron core, a through hole is provided in the middle of the static iron core, the operating part of the moving iron core extends out of the coil frame, and a rod-shaped indicator is fixed to the other end of the moving iron core, and the indicator passes through the spring and the static iron core in sequence and cooperates with the limiting structure.

[0007] Furthermore, the limiting structure is located between the electromagnetic release and the shell, and the limiting structure includes an elastic part and a limiting part; the elastic part drives the limiting part to cooperate with the indicator part, and the indicator part is provided with a locking part that cooperates with the limiting part. Under the cooperation of the limiting part and the locking part, the indicator part remains in a state of passing through the shell.

[0008] Furthermore, the elastic member is a transversely arranged spring, the limiting member is rod-shaped, a groove surrounding the side wall is provided in the middle of the indicator member as a locking portion cooperating with the limiting member, and the end surface of the limiting member in contact with the locking portion is an arc-shaped convex surface.

[0009] Furthermore, the circuit breaker also includes an overload protection system, which includes a bimetallic strip with one end fixed to the housing and the other end of the bimetallic strip serving as a movable end. The movable end of the bimetallic strip causes the operating mechanism's lock to trip and cut off the circuit via a trip lever. The electromagnetic release is located on one side of the operating mechanism and above the overload protection system. The operating portion of the moving iron core pushes the operating mechanism's lock to trip and cut off the circuit via the trip lever.

[0010] Furthermore, one end of the trip lever is connected to the lock of the operating mechanism, and the other end of the trip lever is provided with a first contact portion and a second contact portion as a contact end; the operating portion of the moving iron core acts on the first contact portion to drive the trip lever to cause the lock of the operating mechanism to trip and cut off the circuit, and the movable end of the bimetallic strip acts on the second contact portion to drive the trip lever to cause the lock of the operating mechanism to trip and cut off the circuit.

[0011] Furthermore, the first contact portion and the second contact portion are arranged perpendicular to each other, the central axis of the first contact portion is parallel to the central axis of the trip lever, and the central axis of the second contact portion is perpendicular to the central axis of the trip lever.

[0012] Furthermore, the end of the contact end is bent toward one side of the bimetallic strip to form a second contact portion in a rectangular ring shape, and the area of ​​the trip lever close to the second contact portion serves as the first contact portion; the end of the operating portion is bent toward the trip lever, and the operating portion is located below the first contact portion. The operating portion drives the trip lever to move upward, and the movable end of the bimetallic strip pushes the trip lever to move laterally.

[0013] Furthermore, when the indicator remains in the state of passing through the housing under the action of the limiting structure, the operating portion of the movable iron core limits the lock of the operating mechanism, and the circuit breaker cannot be closed.

[0014] Furthermore, the shell also includes two wiring terminals respectively arranged on both sides of the shell, and a short-circuit protection mechanism, an arc extinguishing system and a contact mechanism are provided between the two wiring terminals; the short-circuit protection mechanism and the electromagnetic release are respectively located on both sides of the operating mechanism, and an arc extinguishing system is provided below the short-circuit protection mechanism. The overload protection system also includes an arc striking plate, one end of the arc striking plate is connected to the bimetallic strip, and the other end extends into the arc extinguishing system.

[0015] Furthermore, the operating mechanism includes a handle, a U-shaped rod, a jump buckle, a lock buckle and a lever. The jump buckle and the lock buckle are rotatably installed on the lever. One end of the U-shaped rod is connected to the handle, and the other end is connected to the jump buckle. The jump buckle is hashi-connected to the lock buckle. A moving contact is provided on the lever, and the moving contact cooperates with a static contact fixed in the shell.

[0016] The circuit breaker of the present invention has an electromagnetic release with an indication function provided in a housing. The indicator is mounted on the movable iron core of the electromagnetic release and passes through the housing as the movable iron core moves up and down. The indicator remains in the state of passing through the housing under the action of a limit structure, indicating the reason for the circuit breaker being opened. The indicator needs to be manually pressed back to its original position before closing the circuit breaker, thereby preventing human error and facilitating the safe use of the circuit breaker.

[0017] In addition, the installation position of the electromagnetic release inside the circuit breaker saves space inside the casing, and by sharing a trip lever with the overload protection system to push the lock of the operating mechanism to trip and cut off the circuit, the internal structure of the circuit breaker is more compact, which is conducive to reducing the size of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the circuit breaker of the present invention;

[0019] Figure 2 yes Figure 1 The main view;

[0020] Figure 3 Schematic diagram of the position of the trip lever in the circuit breaker of the present invention;

[0021] Figure 4 yes Figure 3 Schematic diagram of the coordination between the middle trip lever, bimetallic strip, and moving iron core;

[0022] Figure 5 This is a schematic structural diagram of the electromagnetic release in the circuit breaker of the present invention when no leakage warning is given;

[0023] Figure 6 yes Figure 5 Schematic diagram of the structure of the electromagnetic release;

[0024] Figure 7 This is a schematic structural diagram of the electromagnetic release in the circuit breaker of the present invention when it indicates leakage;

[0025] Figure 8 yes Figure 7 Schematic diagram of the structure of the electromagnetic release. DETAILED DESCRIPTION

[0026] The following is combined with Figures 1 to 8 The following examples are provided to further illustrate the specific implementation of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the description of the following examples.

[0027] In the figure, the direction of arrow Y is longitudinal, and the arrow Y points upward; the direction of arrow X is transverse, and the arrow X points rightward.

[0028] A circuit breaker includes a housing and an operating mechanism and an overload protection system disposed within the housing. An electromagnetic release 4 with an indication function is provided on one side of the operating mechanism. The electromagnetic release 4 has a limiting structure. A movable iron core 41 of the electromagnetic release 4 can move up and down. One end of the movable iron core 41 serves as an operating portion 411, which is used to trip a lock 12 of the operating mechanism, thereby disconnecting the circuit. An indicator 45 is provided at the other end of the movable iron core 41. When the electromagnetic release 4 is actuated, the indicator 45 follows the movement of the movable iron core 41 to pass through the housing and remains in this position under the action of the limiting structure.

[0029] The circuit breaker of the present invention has an electromagnetic release 4 with an indication function disposed within its housing. An indicator 45 is mounted on a movable iron core 41 of the electromagnetic release 4 and extends out of the housing as the movable iron core 41 moves up and down. The indicator 45 remains protruding from the housing under the action of a limiting structure, indicating the reason for the circuit breaker's tripping. The indicator 45 needs to be manually pressed back into place before the circuit breaker can be closed, thereby preventing human error and facilitating safe use of the circuit breaker.

[0030] like Figure 1 、 2As shown in Figures 5 and 6, the circuit breaker includes a housing, within which an operating mechanism and an overload protection system are disposed. The overload protection system includes a bimetallic strip 21 and an arc-strike plate 22 fixed to the housing. One end of the bimetallic strip 21 is connected to the arc-strike plate 22 and fixed to the housing, while the other end serves as a movable end, which, through a trip lever 3, trips the operating mechanism's latch 12, disconnecting the circuit. An electromagnetic trip 4 is disposed on one side of the operating mechanism. The electromagnetic trip 4 has a limiting structure. A movable iron core 41 of the electromagnetic trip 4 can move up and down under the action of a magnetic field. One end of the movable iron core 41 serves as an operating portion 411, which pushes the operating mechanism's latch 12 to trip and disconnect the circuit. The other end of the movable iron core 41 is provided with an indicator 45. The indicator 45 can extend out of the housing in response to the up and down movement of the movable iron core 41 and remains in this position in cooperation with the limiting structure. In this embodiment, the electromagnetic trip 4 is a leakage trip, and the indicator 45 is used to indicate whether the trip is caused by leakage. Of course, the electromagnetic release 4 can also be other types of releases, used to indicate other tripping reasons. Figure 5-8 As shown, the electromagnetic release 4 includes a coil skeleton 46, a moving iron core 41, a static iron core 42, a spring 43 and a limiting structure; the coil 44 is wound around the outside of the coil skeleton 46, the moving iron core 41, the static iron core 42 and the spring 43 are arranged inside the coil skeleton 46, the moving iron core 41 and the static iron core 42 are respectively arranged at both ends of the coil skeleton 46, the spring 43 is arranged between the moving iron core 41 and the static iron core 42, and a through hole is provided in the middle of the static iron core 42. The operating part 411 of the moving iron core 41 extends out of the coil skeleton 46 to push The lock 12 of the operating mechanism causes the operating mechanism to trip and cut off the circuit. A rod-shaped indicator 45 is fixed to the other end of the moving iron core 41. The indicator 45 passes through the spring 43 and the static iron core 42 in sequence. When a circuit leakage occurs and the electromagnetic release 4 is energized, the moving iron core 41 and the static iron core 42 are magnetized. The moving iron core 41 overcomes the elastic force of the spring 43 and is attracted to the static iron core 42, that is, it moves upward. At this time, the indicator 45 follows the moving iron core 41 to extend out of the housing and remains extended out of the housing with the cooperation of the limit structure.

[0031] like Figure 7-8As shown, the limiting structure is located between the electromagnetic release 4 and the shell, preferably between the coil skeleton 46 and the shell. The limiting structure includes an elastic member 49 and a limiting member 47. The elastic member 49 drives the limiting member 47 to cooperate with the indicator 45. One end of the elastic member 49 is fixed, and the other end contacts the limiting member 47 and can drive the limiting member 47 to cooperate with the indicator 45. A locking portion 48 that cooperates with the limiting member 47 is provided on the indicator 45, so that the indicator 45 can maintain the state of passing through the shell. Specifically, the elastic member 49 is preferably a spring arranged horizontally, one end of the spring is fixed, and the other end contacts one end of the limiting member 47. The other end face of the limiting member 47 is an arc-shaped convex surface and is used to contact the rod-shaped indicator 45. The locking portion 48 of the indicator 45 is preferably a groove arranged around the side wall of the indicator 45; when there is no leakage in the circuit, the electromagnetic release 4 is as shown Figure 5-6 As shown, the side wall of the indicator 45 contacts the limiter 47 to squeeze the spring; when leakage occurs in the circuit, the electromagnetic release 4 Figure 7-8 As shown, the moving iron core 41 moves upward under the action of the electromagnetic field, and the groove serving as the locking portion 48 also moves upward. When the limit member 47 contacts the locking portion 48, the two are clamped together under the action of the spring so that the indicator 45 remains extended from the shell. Since the operating portion 411 of the moving iron core 41 is pulled upward by the trip lever 3, the operating mechanism cannot be closed at this time. The circuit breaker can only be closed normally when the indicator 45 is manually pressed back to its original position, further ensuring safety in use.

[0032] The electromagnetic trip device 4 is disposed on one side of the operating mechanism and above the overload protection system. The operating portion 411 of the movable iron core 41 can directly act on the operating mechanism's lock 12 to trip and disconnect the circuit, or it can push the operating mechanism's lock 12 via the trip lever 3 to trip and disconnect the circuit. As shown in the figure, the present invention preferably uses the trip lever 3 to trip and disconnect the circuit. This arrangement saves space within the housing. By sharing a trip lever 3 with the overload protection system to push the operating mechanism's lock 12 to trip and disconnect the circuit, the internal structure of the circuit breaker is more compact, which helps reduce the size of the circuit breaker. At the same time, after the leakage trip is triggered, the operating mechanism cannot be closed. When the indicator 45 remains protruding from the housing due to the action of the limiting structure, the operating portion 411 of the movable iron core 41 limits the trip lever 3, preventing the lock 12 from resetting and the circuit breaker from closing. Of course, the operating portion 411 of the moving iron core 41 and the overload protection system can use different components to cut off the short circuit of the lock 12 of the operating mechanism, but it is not as good as sharing a trip lever 3 to save space.

[0033] like Figure 3-4As shown, the trip lever 3 is arranged horizontally, one end of the trip lever 3 is connected to the lock 12 of the operating mechanism, and the other end is provided with two independent first contact parts 31 and second contact parts 32 as a contact end. The operating part 411 of the movable iron core 41 acts on the first contact part 31 to drive the trip lever 3 to trip the lock 12 of the operating mechanism and cut off the circuit. The movable end of the bimetallic strip 21 acts on the second contact part 32 to drive the trip lever 3 to trip the lock 12 of the operating mechanism and cut off the circuit. Preferably, the first contact portion 31 and the second contact portion 32 are arranged perpendicular to each other, the central axis of the first contact portion 31 is parallel to the central axis of the trip lever 3, the second contact portion 32 is arranged on the side of the trip lever 3 close to the bimetallic strip 21, and the central axis of the second contact portion 32 is perpendicular to the center of the trip lever 3; specifically, the end of the contact end is bent toward the side close to the bimetallic strip 21 to form a rectangular ring-shaped second contact portion 32, and the area of ​​the trip lever 3 close to the second contact portion 32 serves as the first contact portion 31. The rectangular ring is perpendicular to the vertical side of the trip lever 3, which facilitates the bimetallic strip 21 to push the trip lever 3 to move laterally after bending; the end of the operating portion 411 of the moving iron core 41 is bent toward the direction of the trip lever 3, the operating portion 411 contacts the first contact portion 31 and provides support for the trip lever 3, and the operating portion 411 drives the trip lever 3 to move up and down under the action of the moving iron core 41.

[0034] like Figure 1-2As shown, the circuit breaker housing is further provided with a wiring terminal 5, and wiring terminals 5 are respectively provided on both sides of the housing. The wiring terminal 5 on the right side is not shown in the figure. An operating mechanism, an electromagnetic release 4, an overload protection system, a short-circuit protection mechanism 6, an arc extinguishing system 7 and a contact mechanism are provided between the two wiring terminals 5. The short-circuit protection mechanism 6 and the electromagnetic release 4 are respectively located on both sides of the operating mechanism. The arc extinguishing system 7 is provided below the short-circuit protection mechanism 6. The overload protection system also includes an arc striking plate 22. One end of the arc striking plate 22 is connected to the bimetallic strip 21, and the other end extends into the arc extinguishing system 7. The electromagnetic release 4 is provided on one side of the operating mechanism, and the contact mechanism is located between the short-circuit protection mechanism 6 and the operating mechanism; the contact mechanism includes a moving contact 81 and a static contact 82 fixed on the housing and cooperating with the moving contact 81. The operating mechanism includes a handle, a U-shaped rod, a tripper 11, a lock 12, and a lever. The tripper 11 and lock 12 are rotatably mounted on the lever. One end of the U-shaped rod is connected to the handle, and the other end is connected to the tripper 11. The tripper 11 and lock 12 are snap-fitted. The lever is provided with a moving contact 81, which cooperates with a fixed static contact 82 fixed in the housing. When a short circuit occurs, the short-circuit protection mechanism 6 is activated to release the latching connection between the operating mechanism's lock 12 and tripper 11, causing the circuit breaker to trip. When an overload occurs, the overload protection system releases the latching connection between the operating mechanism's lock 12 and tripper 11 via the tripping lever 3. When a leakage occurs, the electromagnetic trip 4 releases the latching connection between the operating mechanism's lock 12 and tripper 11 via the tripping lever 3, simultaneously causing the indicator 45 to extend out of the housing to indicate leakage, and limiting the operating mechanism's lock 12, preventing the circuit breaker from closing.

[0035] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A circuit breaker comprising a housing and an operating mechanism disposed within the housing, characterized in that: An electromagnetic release (4) with an indication function is provided on one side of the operating mechanism. The electromagnetic release (4) has a limiting structure. The movable iron core (41) of the electromagnetic release (4) can move up and down. One end of the movable iron core (41) serves as an operating part (411). The operating part (411) is used to trip the lock (12) of the operating mechanism to cut off the circuit. The other end of the movable iron core (41) is provided with an indication member (45). When the electromagnetic release (4) is actuated, the indication member (45) follows the movement of the movable iron core (41). The electromagnetic release (4) can be moved out of the housing and can maintain the state of being moved out of the housing under the action of the limiting structure; the limiting structure is located between the electromagnetic release (4) and the housing, and the limiting structure includes an elastic member (49) and a limiting member (47); the elastic member (49) drives the limiting member (47) to cooperate with the indicator (45); the indicator (45) is provided with a locking portion (48) that cooperates with the limiting member (47); under the cooperation of the limiting member (47) and the locking portion (48), the indicator (45) maintains the state of being moved out of the housing; The circuit breaker further comprises an overload protection system, the overload protection system comprising a bimetallic strip (21), one end of the bimetallic strip (21) being fixed to the housing, and the other end of the bimetallic strip (21) being a movable end, the movable end of the bimetallic strip (21) causing the lock (12) of the operating mechanism to trip and cut off the circuit through a trip lever (3); the electromagnetic tripper (4) being located on one side of the operating mechanism and above the overload protection system, the operating portion (411) of the movable iron core (41) pushing the lock (12) of the operating mechanism to trip and cut off the circuit through the trip lever (3); when the indicator (45) remains in a state of passing through the housing under the action of the limiting structure, the operating portion (411) of the movable iron core (41) causes the trip lever (3) of the operating mechanism to be limited, and the circuit breaker cannot be closed.

2. The circuit breaker according to claim 1, wherein: The electromagnetic release (4) comprises a static iron core (42), a movable iron core (41) and a spring (43) arranged in a coil frame (46), a coil (44) wound on the coil frame (46), and a limiting structure arranged outside the coil frame (46); the static iron core (42) and the movable iron core (41) are respectively arranged at two ends of the coil frame (46), the spring (43) is arranged between the static iron core (42) and the movable iron core (41), a through hole is provided in the middle of the static iron core (42), the operating part (411) of the movable iron core (41) extends out of the coil frame (46), and a rod-shaped indicator (45) is fixed to the other end of the movable iron core (41), and the indicator (45) passes through the spring (43) and the static iron core (42) in sequence and cooperates with the limiting structure.

3. The circuit breaker according to claim 1, wherein: The elastic member (49) is a transversely arranged spring, the limiting member (47) is rod-shaped, and a groove surrounding the side wall is provided in the middle of the indicating member (45) as a locking portion (48) that cooperates with the limiting member (47). The end surface of the limiting member (47) in contact with the locking portion (48) is an arc-shaped convex surface.

4. The circuit breaker according to claim 1, wherein: One end of the trip lever (3) is connected to the lock (12) of the operating mechanism, and the other end of the trip lever (3) is provided with a first contact portion (31) and a second contact portion (32) as a contact end; the operating portion (411) of the movable iron core (41) acts on the first contact portion (31) to drive the trip lever (3) to trip the lock (12) of the operating mechanism and cut off the circuit, and the movable end of the bimetallic strip (21) acts on the second contact portion (32) to drive the trip lever (3) to trip the lock (12) of the operating mechanism and cut off the circuit.

5. The circuit breaker according to claim 4, characterized in that: The first contact portion (31) and the second contact portion (32) are arranged perpendicular to each other, the central axis of the first contact portion (31) is parallel to the central axis of the trip lever (3), and the central axis of the second contact portion (32) is perpendicular to the central axis of the trip lever (3); the distal end of the contact end is bent toward the side close to the bimetallic strip (21) to form a rectangular ring-shaped second contact portion (32), and the area of ​​the trip lever (3) close to the second contact portion (32) serves as the first contact portion (31); the distal end of the operating portion (411) is bent toward the trip lever (3), and the operating portion (411) is located below the first contact portion (31). The operating portion (411) drives the trip lever (3) to move upward, and the movable end of the bimetallic strip (21) pushes the trip lever (3) to move laterally.

6. The circuit breaker according to claim 1, wherein: The housing further comprises two wiring terminals (5) respectively arranged on both sides of the housing, and a short-circuit protection mechanism (6), an arc extinguishing system (7) and a contact mechanism are provided between the two wiring terminals (5); the short-circuit protection mechanism (6) and the electromagnetic release (4) are respectively located on both sides of the operating mechanism, and an arc extinguishing system (7) is provided below the short-circuit protection mechanism (6). The overload protection system further comprises an arc striking plate (22), one end of the arc striking plate (22) is connected to the bimetallic strip (21), and the other end extends into the arc extinguishing system (7).

7. The circuit breaker according to claim 1, wherein: The operating mechanism comprises a handle, a U-shaped rod, a jump buckle (11), a lock buckle (12) and a lever, wherein the jump buckle (11) and the lock buckle (12) are rotatably mounted on the lever, one end of the U-shaped rod is connected to the handle, and the other end is connected to the jump buckle (11), the jump buckle (11) and the lock buckle (12) are snap-connected, and a moving contact (81) is provided on the lever, and the moving contact (81) cooperates with a stationary contact (82) fixedly arranged in the housing.

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