Circuit breaker handle opening locking structure and circuit breaker

Abstract

The breaker handle opening locking structure comprises a handle and a shell, the handle is arranged in a mounting hole in a linear moving mode, the breaker handle opening locking structure further comprises a locking elastic piece and an unlocking piece, the shell is provided with a locking part and an operation hole, the unlocking piece is movably arranged in the operation hole, and the locking elastic piece comprises a movable part and a fixed part fixed to the handle; when the handle moves to the opening position, the movable part is in limiting fit with the locking part, the handle cannot move towards the closing position, the movable part is located on the moving path of the unlocking piece, and therefore the unlocking piece can drive the movable part to be separated from the locking part, and the handle can move towards the closing position. The circuit breaker comprises the handle opening locking structure. According to the breaker handle opening locking structure and the breaker, electric shock accidents caused by the fact that the breaker is installed in a closed state are prevented, safety is improved, acting force of the unlocking piece is applied to enable the locking elastic piece to be separated from the locking part in the process that the breaker is installed on a cabinet body, and synchronous unlocking of the handle in the process that the breaker is installed is achieved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a circuit breaker handle opening and locking structure and a circuit breaker. Background Art

[0002] During the installation and maintenance of circuit breakers, electric shock accidents often occur due to incorrect closing and opening of the circuit breaker. For example, installing the circuit breaker in the closed state may cause electric shock. Utility Model Content

[0003] The purpose of the present utility model is to overcome at least one defect of the prior art and provide a circuit breaker handle trip locking structure and a circuit breaker.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A circuit breaker handle trip locking structure comprises a handle and a housing, wherein the handle is linearly movable and arranged in a mounting hole of the housing, and can switch between a closed position and an open position, and further comprises a locking spring and an unlocking member, wherein the housing is provided with a locking portion that is limitedly engaged with the locking spring and an operating hole connected to the mounting hole, and the unlocking member is movably arranged in the operating hole, and the locking spring is mounted on the handle and comprises a movable portion and a fixed portion fixed to the handle; when the handle moves to the open position, the movable portion of the locking spring is limitedly engaged with the locking portion, so that the handle cannot move to the closed position, and the movable portion is located on the moving path of the unlocking member, so that the unlocking member can drive the movable portion to separate from the locking portion, so that the handle can move to the closed position.

[0006] Optionally, an avoidance groove and a stop portion located in the avoidance groove are provided on the side of the handle facing the unlocking member, and the unlocking member is provided with an action surface for driving the movable part; when the unlocking member drives the movable part to separate from the locking part, the action surface extends into the avoidance groove, and is used to slide with the stop portion after separating from the movable part.

[0007] Optionally, the locking portion is arranged in the operating hole and connected to the first side wall of the mounting hole; during the movement of the handle to the opening position, the movable portion of the locking spring is squeezed and deformed by the first side wall, and when the handle moves to the opening position, the movable portion of the locking spring moves into the operating hole under its own elastic force.

[0008] Optionally, the movable portion of the locking spring is arranged at an acute angle to the direction in which the handle moves toward the closing position; and the locking portion is a plane perpendicular to the moving direction of the handle.

[0009] Optionally, the moving direction of the handle is perpendicular to the moving direction of the unlocking member.

[0010] Optionally, one end of the unlocking member is an operating portion, and the other end is a driving portion, and the side of the driving portion facing the handle is an active surface for driving the movable portion.

[0011] Optionally, the operating part of the unlocking member is connected to the driving part in an L-shape; the operating hole is an L-shaped groove, having a small end that slides with the operating part and a large end that slides with the driving part, and the connection between the large end and the small end of the operating hole has a resistance surface that resists the driving part.

[0012] Optionally, the fixed portion and the movable portion of the locking spring are connected at an obtuse angle, and the fixed portion is perpendicular to the moving direction of the handle.

[0013] Optionally, a slot is provided on the handle, and the fixing portion of the locking spring is inserted into the slot.

[0014] A circuit breaker comprising any one of the circuit breaker handle opening and locking structures described above.

[0015] Optionally, it also includes an indicator member rotatably arranged on the handle, the handle is provided with an indicator window and a cavity for accommodating the indicator member, the indicator member is provided with an actuated structure extending out of the cavity, and a limit block is provided on the side wall of the mounting hole, the limit block is located on the moving path of the actuated structure, and is used to drive the indicator member to rotate; when the handle moves to the closing position and / or the opening position, the indicator member moves with the handle and contacts the limit block for limitation, and the limit block can drive the indicator member to rotate so that the corresponding indication mark on the indicator member is opposite to the indication window.

[0016] Optionally, the limit block includes two driving surfaces arranged opposite to each other along the movement direction of the handle, and a sliding surface connected between the two driving surfaces, the two driving surfaces are respectively used to push the actuated structure to drive the indicator to rotate, and the sliding surface is used to cooperate with the actuated structure in a limiting manner when the handle is in the closing position and the opening position.

[0017] Optionally, the driven structure includes two connected push rods, and the side surfaces of the two push rods arranged opposite to each other are respectively provided with push surfaces, and a push groove is formed between the push surfaces of the two push rods, and the limit block can extend into the push groove and cooperate with the two push surfaces; the two push rods are respectively provided with a straight surface connected to their respective push surfaces, and the flat surfaces are set at an oblique angle to the corresponding pushing surfaces, and the flat surfaces are slidably matched with the sliding surface of the limit block, and the flat surfaces are used to avoid the driving surface of the limit block.

[0018] Optionally, the indicator member includes an indicator plate and a pivot shaft, and a swing rod connected between the indicator plate and the pivot shaft, the pivot shaft is rotatably connected to the handle, the indicator plate is provided with an indicator mark that cooperates with the indicator window, the pivot shaft passes through the avoidance hole and extends to the outside of the handle and is connected to the driven structure, and the limit block is used to push the indicator member to rotate around the pivot shaft.

[0019] Optionally, it also includes a light guide part fixed on the handle, the light guide part includes a connected light guide column and a light guide plate, the light guide plate is placed in the cavity of the handle and is arranged corresponding to the indicator window of the handle, and a fixing column is provided on one end of the light guide column connected to the light guide plate, which is used to be inserted into the fixing hole on the side wall of the cavity, and the other end of the light guide column extends out of the cavity.

[0020] The circuit breaker handle opening locking structure and circuit breaker of the present invention have a locking spring on the handle and a locking part that cooperates to lock the handle in the opening position, thereby preventing electric shock accidents caused by installing the circuit breaker in the closed state, thereby improving safety. In addition, when the circuit breaker is installed in the cabinet, an unlocking member applies a force to separate the locking spring from the locking part, thereby realizing synchronous unlocking of the handle during the circuit breaker installation process without the need for additional unlocking action.

[0021] In addition, when the handle is in the open position, the movable part of the locking spring automatically springs into the operating hole and cooperates with the locking part to limit the position. The structure is simple and the handle can be automatically locked.

[0022] In addition, the indicator is driven to rotate on the handle through the limit block so that the corresponding indicator mark on the indicator is opposite to the indicator window to indicate the opening and closing status of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the handle, housing and terminal cover of the utility model;

[0024] Figure 2 This is a structural diagram of the handle opening locking structure of the utility model in the circuit breaker opening state;

[0025] Figure 3 This is a structural diagram of the handle opening locking structure of the utility model circuit breaker in the closed state;

[0026] Figure 4 It is a structural diagram of the unlocking member of the utility model;

[0027] Figure 5 It is a structural diagram of the handle portion of the utility model;

[0028] Figure 6 It is a structural diagram of the handle of the utility model;

[0029] Figure 7 It is a cross-sectional view of the terminal cover and indicator of the utility model;

[0030] Figure 8 This is a structural diagram of the terminal cover of the utility model;

[0031] Figure 9 It is a structural diagram of the indicator of the utility model;

[0032] Figure 10 This is a structural diagram of the light guide of the utility model;

[0033] Figure 11 It is an assembly drawing of the half shell and the unlocking piece of the utility model.

[0034] Handle 1; indicator window 11; cavity 12; rotating hole 13; avoidance hole 14; fixing hole 15; avoidance groove 16; stop portion 17; locking spring 2; movable portion 21; fixing portion 22; indicator 3; indicator plate 31; swing lever 32; pivot shaft 33; push rod 34; pushing surface 341; flat surface 342; pushing groove 35; yielding notch 36; light guide 4; light guide column 41; light guide plate 42; fixing column 43; unlocking member 5; operating portion 51; avoidance inclined surface 511; driving portion 52; working surface 521; terminal cover 7; limit block 71; driving surface 711; sliding surface 712; matching groove 72; second side wall 73; housing 8; first side wall 81; locking portion 82; operating hole 83; abutting surface 84. DETAILED DESCRIPTION

[0035] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the circuit breaker handle opening locking structure and the circuit breaker of the present invention. The circuit breaker handle opening locking structure and the circuit breaker of the present invention are not limited to the description of the following embodiments.

[0036] like Figure 1-Figure 3 As shown, the circuit breaker of this embodiment includes a circuit breaker handle trip lock structure. The handle trip lock structure includes a handle 1 and a housing 8. The housing 8 includes two half-shells that together form a mounting cavity for mounting an operating mechanism and a contact mechanism. The mounting cavity has a cavity opening at one end. The terminal cover 7 is fixed within the cavity opening and located above the handle. A mounting hole is formed between the housing 8 and the terminal cover 7. The mounting hole has a first side wall 81 located on the housing 8 and a second side wall 73 located on the terminal cover 7. The handle 1 is linearly movable within the mounting hole of the housing 8 and can be switched between a closed position and an open position. When the handle 1 is operated to the closed position, the handle 1 drives the operating mechanism to close the contact mechanism, thereby closing the circuit breaker. When the handle 1 is operated to the open position, the handle 1 drives the operating mechanism to open the contact mechanism, thereby opening the circuit breaker. Of course, in other embodiments, the terminal cover 7 can also be integrally formed with a portion of the housing 8 and the two half-shells.

[0037] The improvement of this application is that Figure 2-Figure 3As shown, the circuit breaker handle trip lock structure also includes a locking spring 2 and an unlocking member 5. The housing 8 is provided with a locking portion 82 that is limited by the locking spring 2 and an operating hole 83 that communicates with the mounting hole. The unlocking member 5 is movably arranged in the operating hole 83. The locking spring 2 is mounted on the handle 1 and includes a movable portion 21 and a fixed portion 22 fixed to the handle 1. When the handle 1 moves to the trip position, the movable portion 21 of the locking spring 2 is limited by the locking portion 82, preventing the handle 1 from moving to the closed position. The movable portion 21 is located in the movement path of the unlocking member 5. Therefore, under the action of an external force, the unlocking member 5 can drive the movable portion 21 to separate from the locking portion 82, allowing the handle 1 to move to the closed position. The movement direction of the handle 1 is perpendicular to the movement direction of the unlocking member 5. Obviously, the movement direction of the handle 1 and the movement direction of the unlocking member 5 can also be parallel or arranged at other angles. In the circuit breaker handle trip locking structure and circuit breaker of this embodiment, the locking spring 2 on the handle 1 cooperates with the locking portion 82 to lock the handle 1 in the trip position, thereby preventing electric shock accidents caused by installing the circuit breaker in the closed state, thereby improving safety. During the installation of the circuit breaker into the cabinet, the unlocking member 5 applies a force to separate the locking spring 2 from the locking portion 82, thereby achieving synchronous unlocking of the handle 1 during the circuit breaker installation process, without the need for additional unlocking action.

[0038] like Figure 2 、 Figure 3 and Figure 6 As shown, the handle 1 is provided with an avoidance groove 16 and a stop portion 17 located in the avoidance groove 16 on the side facing the unlocking member 5, and the unlocking member 5 is provided with an action surface 521 for driving the movable portion 21; the locking portion 82 is arranged in the operating hole 83 and is connected to the first side wall 81 of the mounting hole. During the movement of the handle 1 toward the open position, the movable portion 21 of the locking spring 2 is squeezed and deformed by the first side wall 81 and retracted into the avoidance groove 16. When the handle 1 is moved to the open position, the movable portion 21 of the locking spring 2 moves into the operating hole 83 under its own elastic force, pushing the unlocking member 5 partially out of the operating hole 83. When the circuit breaker is inserted into the cabinet, the portion of the unlocking member 5 that has been pushed out of the operating hole 83 is pressed into the operating hole 83 by the cabinet, driving the movable portion 21 to separate from the locking portion 82. The active surface 521 of the unlocking member 5 pushes the movable portion 21 into the avoidance groove 16. At this point, the handle 1 is able to move toward the closed position. The active surface 521 is used to separate from the movable portion 21 and then slide with the stop portion 17. After the circuit breaker is fully inserted into the cabinet, the cabinet limiter keeps the unlocking member 5 stationary. Its active surface 521 always slides and engages alternately with the movable portion 21 and the stop portion 17 within the avoidance groove 16, so that the closing of the circuit breaker is no longer restricted. When the handle 1 is in the off position, the movable portion 21 of the locking spring 2 automatically springs into the operating hole 83 and cooperates with the locking portion 82 in a limiting manner. The structure is simple and the handle 1 is automatically locked.

[0039] like Figure 2-Figure 3 As shown, the locking structure of the locking spring 2 of this embodiment has the movable portion 21 of the locking spring 2 arranged at an acute angle with respect to the direction of movement of the handle 1 toward the closed position; the locking portion 82 is a plane perpendicular to the direction of movement of the handle 1. Obviously, the movable portion 21 of the locking spring 2 and the direction of movement of the handle 1 toward the closed position can also be arranged at other angles; the locking portion 82 and the direction of movement of the handle 1 can also be arranged at other angles. This simple structure allows for easy locking and unlocking, and stable and reliable locking.

[0040] Specifically, the fixed portion 22 of the locking spring 2 is connected to the movable portion 21 at an obtuse angle. The fixed portion 22 is perpendicular to the direction of movement of the handle 1. The handle 1 is provided with a slot into which the fixed portion 22 of the locking spring 2 is inserted. In this embodiment, the fixed portion 22 of the locking spring 2 is secured to the handle 1 by an interference fit with the slot. Alternatively, the fixed portion 22 of the locking spring 2 may be embedded in the handle 1 during injection molding to achieve securement.

[0041] like Figure 2-Figure 4 and Figure 11 As shown, the structure of the unlocking member 5 of this embodiment comprises an operating portion 51 at one end, which serves as the site for applying external force, and a driving portion 52 at the other end. The side of the driving portion 52 facing the handle 1 serves as an active surface 521 for driving the movable portion 21. Specifically, the operating portion 51 and the driving portion 52 of the unlocking member 5 are connected in an L-shaped configuration, forming an L-shaped block-like unlocking member 5. The operating hole 83 is an L-shaped slot with a small end that slides with the operating portion 51 and a large end that slides with the driving portion 52. The connection between the large and small ends of the operating hole 83 features a stop surface 84 that abuts the driving portion 52. A sloped surface 511 is provided on the end of the operating portion 51 to avoid the stop surface 84. The locking portion 82 is specifically a sidewall connecting the large end of the operating hole 83 and the stop surface 84. The unlocking member 5 has a simple structure, is easy to form and assemble, and slides with the operating hole 83, ensuring stable and reliable unlocking.

[0042] like Figure 5-Figure 8 As shown, the circuit breaker of this embodiment further includes an indicator 3 rotatably arranged on the handle 1, and the handle 1 is provided with an indicator window 11 ( Figure 1) and a cavity 12 for accommodating the indicator 3, the indicator 3 is provided with an actuated structure extending out of the cavity 12, the side wall of the mounting hole (located on the second side wall 73 on the terminal cover 7) is provided with a mating groove 72 and a limit block 71 in the mating groove 72, the mating groove 72 and the cavity 12 are connected via an avoidance hole 14, the actuated structure of the indicator 3 is located in the mating groove 72, and the limit block 71 is located on the moving path of the actuated structure and is used to drive the indicator 3 to rotate. When the handle 1 moves to the closing position and / or the opening position, the indicator 3 moves with the handle 1 and contacts the limit block 71 for a limit, and the limit block 71 can drive the indicator 3 to rotate so that the corresponding indicator mark on the indicator 3 is opposite to the indicator window 11. The limit block 71 drives the indicator 3 to rotate on the handle 1 so that the corresponding indicator mark on the indicator 3 is opposite to the indicator window 41 to indicate the opening and closing status of the circuit breaker.

[0043] like Figure 8 As shown, the limit block 71 includes two driving surfaces 711 arranged opposite to each other along the moving direction of the handle 1, and a sliding surface 712 connected between the two driving surfaces 711. The two driving surfaces 711 are respectively used to push the actuated structure to drive the indicator 3 to rotate, and the sliding surface 712 is used to cooperate with the actuated structure in limiting position when the handle 1 is in the closing position and the opening position.

[0044] like Figure 5 、 Figure 6 and Figure 9As shown, the indicator 3 includes an indicator plate 31 and a pivot shaft 33, and a swing rod 32 connected between the indicator plate 31 and the pivot shaft 33. The pivot shaft 33 is rotatably connected to the handle 1 and is rotatably inserted into the rotation hole 13 of the handle 1. The indicator plate 31 is provided with an indicator mark that cooperates with the indicator window 11. The indicator mark can be of different colors or symbols or texts and is used to indicate the opening and closing status of the circuit breaker. The pivot shaft 33 passes through the avoidance hole 14 and extends to the outside of the handle 1 to be connected to the driven structure. The limit block 71 is used to push the indicator 3 to rotate around the pivot shaft 33. Specifically, the passive structure includes two connected push rods 34, each having a push surface 341 on opposite sides thereof. A push groove 35 is formed between the push surfaces 341 of the two push rods 34, and a stop block 71 can extend into the push groove 35 and engage with the two push surfaces 341. The two push rods 34 are each provided with a flat surface 342 connected to their respective push surfaces 341. The flat surfaces 342 are arranged at an oblique angle to the corresponding push surface 341, and the flat surfaces 342 slidably engage with the sliding surface 712 of the stop block 71. The flat surfaces 342 are configured to avoid the driving surface 711 of the stop block 71. Specifically, the two push rods 34 are connected in a V-shape, and the apex of the V-shape of the two push rods 34 is connected to the pivot shaft 33. A clearance notch 36 is provided on the outer side of the end of one of the push rods 34 connected to the pivot shaft 33, which is configured to give way to the handle 1 when the indicator 3 rotates to avoid interference with the handle 1.

[0045] like Figure 5 and Figure 10 As shown, the circuit breaker of this embodiment also includes a light guide 4 fixed to the handle 1, the light guide 4 includes a connected light guide column 41 and a light guide plate 42, the light guide plate 42 is placed in the cavity 12 of the handle 1 and is arranged corresponding to the indicator window 11 of the handle 1, the indicator plate 31 and the light guide plate 42 are preferably arc-shaped plates, the indicator plate 31 is located between the light guide plate 42 and the indicator window 11, and a fixing column 43 is provided on one end of the light guide column 41 connected to the light guide plate 42, which is used to be inserted into the fixing hole 15 on the side wall of the cavity 12, and the other end of the light guide column 41 extends out of the cavity 12 and is used to correspond to the light source setting. The light source is transmitted to the light guide plate 42 through the light guide column 41, and the internal alarm status of the circuit breaker is displayed by the indicator window 11. The alarm status includes but is not limited to the opening and closing status, and fault indications such as current and voltage abnormalities.

[0046] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not imply that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0047] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot 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 handle opening locking structure, comprising a handle (1) and a housing (8), wherein the handle (1) is arranged in a mounting hole of the housing (8) for linear movement and can be switched between a closing position and an opening position, and is characterized in that: The invention also comprises a locking spring (2) and an unlocking member (5); the housing (8) is provided with a locking portion (82) limitedly matched with the locking spring (2) and an operating hole (83) communicated with the mounting hole; the unlocking member (5) is movably arranged in the operating hole (83); the locking spring (2) is mounted on the handle (1) and comprises a movable portion (21) and a fixed portion (22) fixed on the handle (1); when the handle (1) moves to the opening position, the movable portion (21) of the locking spring (2) is limitedly matched with the locking portion (82), so that the handle (1) cannot move to the closing position, and the movable portion (21) is located on the moving path of the unlocking member (5), so that the unlocking member (5) can drive the movable portion (21) to separate from the locking portion (82), so that the handle (1) can move to the closing position.

2. The circuit breaker handle opening locking structure according to claim 1, characterized in that: The handle (1) is provided with an avoidance groove (16) and a stopper (17) located in the avoidance groove (16) on a side facing the unlocking member (5); the unlocking member (5) is provided with an action surface (521) for driving the movable portion (21); when the unlocking member (5) drives the movable portion (21) to separate from the locking portion (82), the action surface (521) extends into the avoidance groove (16) and is used to slide with the stopper (17) after separation from the movable portion (21).

3. The circuit breaker handle opening locking structure according to claim 1, characterized in that: The locking portion (82) is arranged in the operating hole (83) and is connected to the first side wall (81) of the mounting hole; when the handle (1) moves to the opening position, the movable portion (21) of the locking spring (2) is squeezed and deformed by the first side wall (81); when the handle (1) moves to the opening position, the movable portion (21) of the locking spring (2) moves into the operating hole (83) under its own elastic force.

4. The circuit breaker handle opening locking structure according to claim 3, characterized in that: The movable portion (21) of the locking spring (2) is arranged at an acute angle to the direction in which the handle (1) moves toward the closing position; and the locking portion (82) is a plane perpendicular to the moving direction of the handle (1).

5. The circuit breaker handle opening locking structure according to claim 1, characterized in that: The moving direction of the handle (1) is perpendicular to the moving direction of the unlocking member (5).

6. The circuit breaker handle opening and locking structure according to any one of claims 1 to 5, characterized in that: One end of the unlocking member (5) is an operating portion (51), and the other end is a driving portion (52). The side of the driving portion (52) facing the handle (1) is an action surface (521) for driving the movable portion (21).

7. The circuit breaker handle opening locking structure according to claim 6, characterized in that: The operating portion (51) of the unlocking member (5) is connected to the driving portion (52) in an L-shaped manner; the operating hole (83) is an L-shaped groove having a small end that slides with the operating portion (51) and a large end that slides with the driving portion (52); a connecting portion between the large end and the small end of the operating hole (83) has a resisting surface (84) that resists with the driving portion (52).

8. The circuit breaker handle opening and locking structure according to any one of claims 1 to 5, characterized in that: The fixed portion (22) and the movable portion (21) of the locking spring (2) are connected at an obtuse angle, and the fixed portion (22) is perpendicular to the moving direction of the handle (1).

9. The circuit breaker handle opening locking structure according to claim 1, characterized in that: The handle (1) is provided with a slot, and the fixing portion (22) of the locking spring (2) is inserted into the slot.

10. A circuit breaker, characterized in that: The invention comprises the circuit breaker handle opening and locking structure according to any one of claims 1 to 9.

11. The circuit breaker according to claim 10, wherein: The invention also includes an indicator (3) rotatably arranged on the handle (1), the handle (1) being provided with an indicator window (11) and a cavity (12) for accommodating the indicator (3), the indicator (3) being provided with an actuated structure extending out of the cavity (12), a limit block (71) being provided on the side wall of the mounting hole, the limit block (71) being located on the moving path of the actuated structure and being used to drive the indicator (3) to rotate; when the handle (1) is moved to the closing position and / or the opening position, the indicator (3) moves with the handle (1) and contacts the limit block (71) for limiting position, and the limit block (71) can drive the indicator (3) to rotate so that the corresponding indicator mark on the indicator (3) is opposite to the indicator window (11).

12. The circuit breaker according to claim 11, wherein: The limit block (71) comprises two driving surfaces (711) arranged opposite to each other along the moving direction of the handle (1), and a sliding surface (712) connected between the two driving surfaces (711); the two driving surfaces (711) are respectively used to push the driven structure to drive the indicator (3) to rotate; the sliding surface (712) is used to cooperate with the driven structure in a limiting manner when the handle (1) is located in the closing position and the opening position.

13. The circuit breaker according to claim 11, wherein: The driven structure comprises two connected push rods (34), and the side surfaces of the two push rods (34) are respectively provided with push surfaces (341) arranged opposite to each other, and a push groove (35) is formed between the push surfaces (341) of the two push rods (34), and the limit block (71) can extend into the push groove (35) and cooperate with the two push surfaces (341); the two push rods (34) are respectively provided with a straight surface (342) connected to their respective push surfaces (341), and the straight surface (342) is arranged at an oblique angle to the corresponding push surface (341), and the straight surface (342) is slidably matched with the sliding surface (712) of the limit block (71), and the straight surface (342) is used to avoid the driving surface (711) of the limit block (71).

14. The circuit breaker according to claim 11, wherein: The indicator member (3) comprises an indicator plate (31) and a pivot shaft (33), and a swinging rod (32) connected between the indicator plate (31) and the pivot shaft (33); the pivot shaft (33) is rotatably connected to the handle (1); an indicator mark that matches the indicator window (11) is provided on the indicator plate (31); the pivot shaft (33) passes through the avoidance hole (14) and extends to the outside of the handle (1) to be connected to the driven structure; the limit block (71) is used to push the indicator member (3) to rotate around the pivot shaft (33).

15. The circuit breaker according to claim 10, wherein: The invention also includes a light guide member (4) fixed on the handle (1), wherein the light guide member (4) includes a light guide column (41) and a light guide plate (42) connected to each other, wherein the light guide plate (42) is placed in the cavity (12) of the handle (1) and is arranged corresponding to the indication window (11) of the handle (1), and a fixing column (43) is provided on one end of the light guide column (41) connected to the light guide plate (42) for being inserted into a fixing hole (15) on the side wall of the cavity (12), and the other end of the light guide column (41) extends out of the cavity (12).

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