Leakage protection circuit breaker

Abstract

An electric leakage protection circuit breaker comprises a circuit breaker unit and an electric leakage protection unit, the electric leakage protection unit comprises an electric leakage release, an unlocking piece and a reset button, the reset button can linearly move between a first position and a second position, the unlocking piece can lock the reset button at the first position, and the unlocking piece can lock the reset button at the second position. The electric leakage release drives the unlocking piece to act during electric leakage, so that the unlocking piece triggers the operation mechanism of the circuit breaker unit to release, the locking of the reset button is relieved, and the reset button moves to a second position, and the electric leakage protection unit comprises an indicating piece connected with the reset spring. The moving direction of the indicating piece is perpendicular to the moving direction of the reset button, and when the reset button is located at one of the first position and the second position, the indicating piece is pushed to overcome the acting force of the reset spring to drive the second mark to move to the indicating hole. When the reset button is located at the other one of the first position and the second position, the reset spring drives the indicating piece to enable the first mark to move to the indicating hole.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a leakage protection circuit breaker. Background Art

[0002] Residual current operated circuit breakers primarily protect the main circuit from leakage. In product design, all devices incorporate both residual current protection and an infrequent leakage detection circuit. Some products incorporate a residual current operated indication function, providing separate indications for normal operation and leakage conditions. However, these indications are often obscure and difficult to read. Some products incorporate a leakage reset function, where a button pops up when leakage occurs. If not pressed, the product will not mechanically close. Pressing the button restores the product to normal operation. However, if both functions are present, the product structure will generally be more complex. Utility Model Content

[0003] The purpose of the utility model is to overcome at least one defect of the prior art and provide a leakage protection circuit breaker.

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

[0005] A leakage protection circuit breaker includes a circuit breaker unit and a leakage protection unit. The leakage protection unit includes a housing and a zero-sequence current transformer, a leakage release, a reset button, and an unlocking member respectively arranged in the housing. The zero-sequence current transformer is used to detect leakage current in the circuit breaker unit. The housing is provided with a reset hole for installing the reset button. The reset button can move linearly between a first position and a second position. The unlocking member can lock the reset button in the first position. When leakage occurs, the leakage release drives the unlocking member to operate, causing the unlocking member to trigger the circuit breaker unit's operating mechanism to trip and unlock the reset button, allowing the reset button to move to the second position.

[0006] The leakage protection unit includes an indicator member arranged to move linearly, the moving direction of the indicator member is perpendicular to the moving direction of the reset button, the indicator member is provided with a first mark and a second mark, the shell is provided with an indicator hole, the indicator member is connected to a reset spring, when the reset button is in one of the first position or the second position, the indicator member is pushed to overcome the force of the reset spring and drive the second mark to move to the indicator hole; when the reset button is in the other of the first position or the second position, the reset spring drives the indicator member to move the first mark to the indicator hole.

[0007] Preferably, when the reset button is in the second position, the reset button or the unlocking member limits the lock of the operating mechanism, so that the lock cannot be reset and the circuit breaker cannot perform the closing operation; when the reset button is in the first position, it is locked by the unlocking member, and the unlocking member or the reset button releases the lock limit of the operating mechanism, and the circuit breaker can perform the closing operation.

[0008] Preferably, the reset button includes a locking portion, a pressing portion and a pushing portion, the pushing portion is used to push the indicator member to move, the locking portion is used to lock and cooperate with the unlocking member, the indicator member is provided with a sliding surface that cooperates with the pushing portion, and the sliding surface is inclined to the moving direction of the indicator member. Pressing the pressing portion can drive the reset button to move to the first position and enable the locking portion to be locked by the unlocking member.

[0009] Preferably, an inclined pushing surface is provided at the end of the pushing portion, and the pushing surface is used to push the sliding surface.

[0010] Preferably, when the reset button moves to the first position, it drives the pushing part to push the sliding surface, so that the indicator overcomes the force of the reset spring and moves the second mark to the indicator hole. When the unlocking part releases the lock of the locking part, the reset spring drives the indicator to move and drives the first mark to move to the indicator hole. At the same time, the indicator drives the reset button to move to the second position through the sliding surface.

[0011] Preferably, the leakage protection unit is further provided with a button spring, the reset button compresses the button spring in the first position, and the button spring is released when the unlocking member unlocks the reset button, and the button spring drives the reset button to move to the second position.

[0012] Preferably, the leakage protection unit is further provided with a test button, and the test button and the reset button are relatively arranged on both sides of the indicator along the movement direction of the indicator.

[0013] Preferably, the leakage release is arranged between the test button and the reset button, and the indicator is arranged on the side of the leakage release away from the zero-sequence current transformer.

[0014] Preferably, the leakage release is provided with a tripping rod for driving the unlocking member to move, and the moving direction of the tripping rod is arranged parallel to the moving direction of the indicating member.

[0015] Preferably, the indicator includes a vertically arranged indicator plate and a spring plate, the indicator plate is provided with a first mark and a second mark, the spring plate is provided with a sliding portion on the side close to the reset button, and a sliding surface is provided on the sliding portion, the side of the spring plate away from the sliding portion is in contact with the reset spring, and the reset spring drives the indicator to move through the spring plate.

[0016] Preferably, the width of the indicator plate is smaller than that of the spring plate. The indicator plate is located on the side of the indicator hole. An extension plate is provided between the side of the indicator plate and the side of the spring plate. The extension plate is connected between the indicator plate and the spring plate.

[0017] Preferably, the shell includes a first side plate and a second side plate arranged opposite to each other, and a partition plate arranged between the first side plate and the second side plate, the first side plate is provided with a first sliding groove for accommodating the indicator, the first side plate is provided with a first limiting plate, and the partition plate is provided with a second limiting plate, the first limiting plate and the second limiting plate respectively extend into the first sliding groove and respectively slide with the two opposite side edges of the spring plate of the indicator.

[0018] Preferably, the first side plate is provided with a second slide groove for accommodating the pressing portion of the reset button, the second slide groove is communicated with the first slide groove, and the side of the pressing portion close to the first slide groove is provided with a pushing portion inserted into the first slide groove.

[0019] Preferably, the locking portion includes an insertion portion arranged parallel to the moving direction of the indicator member, and a connecting portion connected between the middle part of the insertion portion and the pressing portion. The unlocking member is rotatably arranged and is provided with a driving hole for connecting the leakage release and a socket for inserting the insertion portion.

[0020] The leakage protection circuit breaker of the present invention is provided with an independent indicator member, and is provided with a first mark and a second mark. The indicator member is driven to switch between the first mark and the second mark by the cooperation of a reset button and a reset spring. When a leakage fault occurs, the reset button moves from the first position to the second position, causing the indicator member to change position and thus indicate the leakage fault. The moving direction of the indicator member is perpendicular to the moving direction of the reset button, which makes it easy for the user to check whether a leakage fault occurs.

[0021] In addition, when the reset button is in the second position, the reset button or the unlocking member limits the lock of the operating mechanism, so that the lock cannot be reset and the circuit breaker cannot perform the closing operation; when the reset button is pressed and moved to the first position retracted into the shell, it is locked by the unlocking member, and the unlocking member or the reset button releases the lock limit on the operating mechanism. At this time, the circuit breaker can perform the closing operation, requiring the user to press the reset button to retract it into the shell before the circuit breaker can be closed, thereby improving safety. The indicator, reset button and unlocking member cooperate to realize the leakage indication and leakage reset functions at the same time. The structure is simple and the leakage indication is easy to view.

[0022] In addition, the reset button and the indicator can be driven to reset simultaneously by a reset spring, thereby reducing costs.

[0023] In addition, the indicator plate is located on the side of the indicator hole, and the extension plate is not located on the side of the indicator hole, but the extension plate is connected between the indicator plate and the spring plate, which can improve the strength of the indicator plate and prevent the indicator plate from being damaged.

[0024] In addition, the first limiting plate and the second limiting plate extend into the first sliding groove respectively, and slide with the two opposite side edges of the spring plate of the indicator respectively, which not only guides the indicator but also limits the indicator plate of the indicator to the side of the indicator hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of the leakage protection circuit breaker of the utility model;

[0026] Figure 2 It is a structural diagram of the indicator of the utility model;

[0027] Figure 3 It is a structural diagram of the new reset button;

[0028] Figure 4 This is a schematic diagram of the structure of the reset button of the utility model retracted into the housing;

[0029] Figure 5 This utility model Figure 4 A partial enlarged view of

[0030] Figure 6 This is a schematic diagram of the structure of the reset button of the utility model extending out of the housing;

[0031] Figure 7 This utility model Figure 6 A partial enlarged view of

[0032] Figure 8 It is a cross-sectional schematic diagram of the leakage protection circuit breaker of the utility model;

[0033] In the picture:

[0034] 1 circuit breaker unit

[0035] 2 Leakage protection unit

[0036] 3 Shell

[0037] 4 Zero-sequence current transformer

[0038] 5 Leakage release

[0039] 6 unlocking parts

[0040] 7 Reset button

[0041] 8 indicators

[0042] 9 Return spring

[0043] 21 Test button

[0044] 22 Shrapnel

[0045] 31 First side panel

[0046] 32 Second side panel

[0047] 33 partition

[0048] 34 First Chute

[0049] 35 First limit plate

[0050] 36 Second limit plate

[0051] 50 Trip lever

[0052] 60 jack

[0053] 71 Locking part

[0054] 72 Pressing part

[0055] 73 Promotion Department

[0056] 80 indicator hole

[0057] 81 First Sign

[0058] 82 Second Sign

[0059] 83 sliding surface

[0060] 84 Dashboard

[0061] 85 Spring Plate

[0062] 86 Sliding part

[0063] 87 extension board

[0064] 711 Insertion

[0065] 712 Connection DETAILED DESCRIPTION

[0066] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the leakage protection circuit breaker of the present invention. The leakage protection circuit breaker of the present invention is not limited to the description of the following embodiments.

[0067] like Figure 1 、 Figure 4As shown, the leakage protection circuit breaker of this embodiment includes a circuit breaker unit 1 and a leakage protection unit 2. The circuit breaker unit 1 includes a short-circuit protection mechanism, an overload protection mechanism, an operating mechanism, a moving contact, and a static contact. The handle is connected to the operating mechanism, which is connected to the moving contact. The moving contact contacts and separates with the static contact under the drive of the handle. The operating mechanism is locked in an energy storage state when the moving contact contacts the static contact. The short-circuit protection mechanism and the overload protection mechanism respectively drive the lock of the operating mechanism when a short-circuit fault occurs and an overload fault occurs, causing the operating mechanism to trip and drive the moving contact and the static contact to separate, thereby achieving short-circuit protection and overload protection.

[0068] The leakage protection unit 2 includes a housing 3 and a zero-sequence current transformer 4, a leakage release 5, and an unlocking member 6 disposed therein. The zero-sequence current transformer 4 is used to detect leakage current in the circuit breaker unit 1. The leakage release 5 activates the unlocking member 6 when a leakage fault occurs, causing the unlocking member 6 to trigger the tripping of the operating mechanism of the circuit breaker unit 1, causing the operating mechanism to separate the moving contact from the static contact, thereby opening the circuit breaker unit 1 to achieve leakage protection. Typically, the unlocking member 6 pushes the lock of the operating mechanism to trigger the operating mechanism to trip, which is conventional in the art.

[0069] like Figure 2-7 As shown, an improvement of this embodiment is that the leakage protection unit 2 further includes a reset button 7 and an indicator 8, and the housing 3 is provided with a reset hole for installing the reset button 7. The reset button 7 can move linearly between a first position and a second position. Pressing the reset button 7 can move it to the first position, and the unlocking member 6 can lock the reset button 7 in the first position. When the leakage release 5 causes leakage, the unlocking member 6 is actuated, so that the unlocking member 6 triggers the operating mechanism of the circuit breaker unit 1 to trip, and releases the lock on the reset button 7, so that the reset button 7 moves to the second position. The protective unit 2 also includes an indicator member 8 that is arranged to move linearly. The moving direction of the indicator member 8 is perpendicular to the moving direction of the reset button 7. The indicator member 8 is provided with a first mark 81 and a second mark 82. The shell 3 is provided with an indicator hole 80. The indicator member 8 is connected to the reset spring 9. When the reset button 7 is in one of the first position or the second position, the indicator member 8 is pushed to overcome the force of the reset spring 9 and drive the second mark 82 to move to the indicator hole 80; when the reset button 7 is in the other of the first position or the second position, the indicator member 8 is driven to move the first mark 81 to the indicator hole 80.

[0070] The leakage protection circuit breaker of this embodiment is provided with an independent indicator 8, and is provided with a first mark 81 and a second mark 82. The indicator 8 is driven to switch between the first mark 81 and the second mark 82 by the cooperation of the reset button 7 and the reset spring 9. When a leakage fault occurs, the reset button 7 moves from the first position to the second position, causing the indicator 8 to change position and thus indicate a leakage fault. The movement direction of the indicator 8 is perpendicular to the movement direction of the reset button 7, which makes it easy for the user to check whether a leakage fault occurs.

[0071] like Figure 4 As shown, the leakage protection unit 2 is further provided with a test button 21 and a test circuit. The housing 3 is provided with a test hole for the test button 21 to extend out of the housing 3. The test circuit includes a spring 22 and a test conductor constituting a breakpoint. The test button 21 is used to push the spring 22 into contact with the test conductor, causing the test circuit to conduct and generate a simulated leakage signal for periodically checking whether the leakage protection function is operating normally. Preferably, the test button 21 and the reset button 7 are arranged on opposite sides of the indicator 8 along the direction of movement of the indicator 8. The leakage release 5 is also arranged between the test button 21 and the reset button 7. The indicator 8 is arranged on the side of the leakage release 5 away from the zero-sequence current transformer 4. The leakage release 5 is provided with a trip rod 50 for driving the unlocking member 6 to move. The movement direction of the trip rod 50 is arranged parallel to the movement direction of the indicator 8.

[0072] like Figure 2-3As shown, an embodiment of the reset button 7 and the indicator member 8 is shown. The reset button 7 includes a locking portion 71, a pressing portion 72, and a pushing portion 73. The pressing portion 72 is used for pressing, and the pushing portion 73 is used to push the indicator member 8 to move. The locking portion 71 is used to lock and cooperate with the unlocking member 6. The indicator member 8 is provided with a sliding surface 83 that cooperates with the pushing portion 73. The sliding surface 83 is arranged at an angle with the moving direction of the indicator member 8 and is located below the pushing portion 73. Pressing the pressing portion 72 can drive the reset button 7 to move to the first position. When the reset button 7 moves to the first position, the pushing portion 73 pushes the sliding surface 83, causing the indicator member 8 to overcome the force of the reset spring 9 and move away from the reset button 7. The second mark 82 is moved to the indicator hole 80, and the locking portion 71 is locked by the unlocking member 6. At this time, the reset button 7 is basically retracted into the housing 3 and cannot move to the second position. When a leakage fault occurs, the leakage release 5 drives the unlocking member 6 to operate, causing the unlocking member 6 to actuate the latch of the operating mechanism of the circuit breaker unit 1, triggering the operating mechanism to trip. Simultaneously, the unlocking member 6 releases the lock on the locking portion 71, and the reset spring 9 drives the indicator 8 to move, driving the first mark 81 to move to the indicator hole 80. Simultaneously, the indicator 8 drives the reset button 7 to the second position via the sliding surface 83. The pressing portion 72 extends outside the housing 3, and the reset button 7 and the indicator 8 are simultaneously driven to reset by a reset spring 9. Preferably, a notch is provided on the lower side of the end of the pushing portion 73, forming an inclined pushing surface 730, which is used to push the sliding surface 83.

[0073] The first mark 81 is used to indicate that a leakage fault has occurred, and the second mark 82 is used to indicate that no leakage fault has occurred. The first mark 81 and the second mark can be different colors, symbols or texts, etc. Preferably, the first mark 81 is red and the second mark is green.

[0074] As another embodiment, the leakage protection unit 2 is further provided with a button spring, which is connected to the reset button 7. The reset button 7 compresses the button spring when it is in the first position, and releases the button spring when the unlocking member 7 unlocks the reset button 7. The button spring drives the reset button 7 to move to the second position, that is, it also drives the pushing part 73 away from the indicator member 8. The reset spring 9 drives the indicator member 8 to move and drives the first mark 81 to move to the indicator hole 80, that is, the reset spring 9 is set and the button spring is also set.

[0075] As another embodiment, the inclined sliding surface 83 may also be provided on the pushing portion 73 , and the pushing portion 73 pushes the indicating member 8 to move via the inclined sliding surface 83 .

[0076] In addition, as another embodiment, the sliding surface 83 can also change the direction of inclination and be arranged above the pushing portion 73, so that the reset button 7 is away from the sliding surface 83 when the shell 3 is retracted to the first position, the pushing portion 73 avoids the sliding surface 83, and the reset spring 9 drives the indicator 8 to move the first mark 81 to the indicator hole 80. When the button spring drives the reset button 7 to move to the second position, the sliding surface 83 is pushed by the pushing portion 73 so that the indicator 8 overcomes the force of the reset spring 9 and drives the second mark 82 to move to the indicator hole 80. This is also possible, and all belong to the protection scope of the present utility model.

[0077] Preferably, when the reset button 7 is in the second position, the reset button 7 or the unlocking member 6 limits the lock of the operating mechanism, so that the lock cannot be reset and the circuit breaker cannot perform the closing operation; when the reset button 7 is pressed and moved to the first position retracted into the shell, it is locked by the unlocking member 6, and the unlocking member 6 or the reset button 7 releases the lock limit of the operating mechanism. At this time, the circuit breaker can perform the closing operation, requiring the user to press the reset button 7 to retract into the shell before the circuit breaker can be closed, thereby improving safety.

[0078] like Figure 3 、 Figure 4 As shown, the locking portion 71 includes an insertion portion 711 arranged parallel to the moving direction of the indicator 8, and a connecting portion 712 connected between the middle of the insertion portion 711 and the pressing portion 72. The unlocking member 6 is rotatably arranged, and the unlocking member 6 is provided with a driving hole for connecting the leakage release 5, and a socket 60 for inserting the insertion portion 711.

[0079] When the reset button 7 is pressed and retracted into the housing 3, the reset button 7 pushes the indicator 8 to move so that the second mark 82 moves to the position corresponding to the indicator hole 80. The reset spring 9 stores energy, and the insertion portion 711 extends into the insertion hole 60 to lock the reset button 7 in the housing 3. At the same time, the reset button 7 drives the unlocking member 6 to reset, releasing the limit of the lock of the operating mechanism, so that the operating mechanism can perform the closing operation;

[0080] When a leakage fault occurs and the leakage release 5 is actuated, the unlocking member 6 is pulled by the leakage release 5, triggering the lock of the operating mechanism, causing the operating mechanism to trip, and the unlocking member 6 releases the lock portion 71 of the reset button 7, and the reset button 7 moves to the second position. At the same time, the unlocking member 6 or the reset button 7 presses against the lock, so that the lock of the operating mechanism cannot be reset and the closing operation cannot be performed. The reset spring 9 drives the indicator 8 to move the first mark 81 to the position corresponding to the indicator hole 80, indicating that a leakage fault has occurred. Figure 2As shown, a specific embodiment of the indicator 8, the indicator 8 includes a vertically arranged indicator plate 84 and a spring plate 85, the indicator plate 84 is provided with a first mark 81 and a second mark 82, the spring plate 85 is provided with a sliding portion 86 on the side close to the reset button 7, and a sliding surface 83 is provided on the sliding portion 86, the side of the spring plate 85 away from the sliding portion 86 is in contact with the reset spring 9, and the reset spring 9 drives the indicator 8 to move through the spring plate 85.

[0081] Preferably, the width of the indicator plate 84 is smaller than the width of the spring plate 85. The indicator plate 84 is located on the side of the indicator hole 80. An extension plate 87 is provided between the side of the indicator plate 84 and the side of the spring plate 85. The extension plate 87 is connected between the indicator plate 84 and the spring plate 85. The extension plate 87 is not located on the side of the indicator hole 80, but can serve to increase the strength of the indicator plate 84 to prevent damage to the indicator plate 84.

[0082] Preferably, a limiting shaft is provided on the spring plate 85 (not shown in the figure), and the end of the reset spring 9 in contact with the spring plate 85 is used to be sleeved on the limiting shaft, which can make the reset spring 9 and the indicator 8 cooperate more reliably.

[0083] Preferably, a guide rail is provided inside the housing 3 , and a guide groove that slides with the guide rail is provided on the spring plate 85 , which can serve as a guide for the indicator 8 .

[0084] like Figure 8 As shown, the shell 3 includes a first side plate 31 and a second side plate 32 arranged opposite to each other, and a partition plate 33 arranged between the first side plate 31 and the second side plate 32. The first side plate 31 is provided with a first slide groove 34 for accommodating the indicator 8. The first slide groove 34 is used to limit the moving direction of the indicator 8 so that the indicator 8 can only move in a direction perpendicular to the moving direction of the reset button 7. The first side plate 31 is provided with a first limiting plate 35, and the partition plate 33 is provided with a second limiting plate 36. The first limiting plate 35 and the second limiting plate 36 respectively extend into the first slide groove 34 and respectively slide with the two opposite side edges of the spring plate 85 of the indicator 8, which can not only guide the indicator 8, but also limit the indicator plate 84 of the indicator 8 to the side of the indicator hole 80.

[0085] like Figure 4 As shown, the first side plate 31 is provided with a second slide groove for accommodating the pressing portion 72 of the reset button 7, the second slide groove is connected to the first slide groove 34, and the pushing portion 73 is provided on the side of the pressing portion 72 close to the first slide groove 34 and inserted into the first slide groove 34.

[0086] 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.

[0087] 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 leakage protection circuit breaker, comprising a circuit breaker unit (1) and a leakage protection unit (2), wherein the leakage protection unit (2) comprises a housing (3) and a zero-sequence current transformer (4), a leakage release (5), a reset button (7) and an unlocking member (6) respectively arranged in the housing (3), wherein the zero-sequence current transformer (4) is used to detect leakage current in the circuit breaker unit (1), the housing (3) is provided with a reset hole for installing the reset button (7), the reset button (7) can move linearly between a first position and a second position, the unlocking member (6) can lock the reset button (7) in the first position, the leakage release (5) drives the unlocking member (6) to operate when leakage occurs, so that the unlocking member (6) triggers the operating mechanism of the circuit breaker unit (1) to trip, and releases the lock of the reset button (7), so that the reset button (7) moves to the second position, characterized in that: The leakage protection unit (2) comprises an indicator (8) arranged to move linearly, the moving direction of the indicator (8) being perpendicular to the moving direction of the reset button (7), the indicator (8) being provided with a first mark (81) and a second mark (82), the housing (3) being provided with an indicator hole (80), the indicator (8) being connected to a reset spring (9), and when the reset button (7) is located in one of the first position or the second position, the indicator (8) is pushed to overcome the action of the reset spring (9) and drive the second mark (82) to move to the indicator hole (80); when the reset button (7) is located in the other of the first position or the second position, the reset spring (9) drives the indicator (8) to move the first mark (81) to the indicator hole (80).

2. The leakage protection circuit breaker according to claim 1, characterized in that: When the reset button (7) is in the second position, the reset button (7) or the unlocking member (6) limits the lock of the operating mechanism, so that the lock cannot be reset and the circuit breaker cannot perform the closing operation; when the reset button (7) is in the first position, it is locked by the unlocking member (6), and the unlocking member (6) or the reset button (7) releases the lock limit on the operating mechanism, and the circuit breaker can perform the closing operation.

3. The leakage protection circuit breaker according to claim 1, characterized in that: The reset button (7) comprises a locking portion (71), a pressing portion (72) and a pushing portion (73); the pushing portion (73) is used to push the indicator (8) to move; the locking portion (71) is used to lock and cooperate with the unlocking portion (6); the indicator (8) is provided with a sliding surface (83) that cooperates with the pushing portion (73); the sliding surface (83) is arranged obliquely with respect to the moving direction of the indicator (8); pressing the pressing portion (72) can drive the reset button (7) to move to the first position, and enable the locking portion (71) to be locked by the unlocking portion (6).

4. The leakage protection circuit breaker according to claim 3, characterized in that: An inclined pushing surface (730) is provided at the end of the pushing portion (73), and the pushing surface (730) is used to push the sliding surface (83).

5. The leakage protection circuit breaker according to claim 3, characterized in that: When the reset button (7) moves to the first position, it drives the pushing portion (73) to push the sliding surface (83), so that the indicator (8) overcomes the action of the reset spring (9) and moves to move the second mark (82) to the indicator hole (80). When the unlocking member (6) releases the lock of the locking portion (71), the reset spring (9) drives the indicator (8) to move and drives the first mark (81) to move to the indicator hole (80). At the same time, the indicator (8) drives the reset button (7) to move to the second position through the sliding surface (83).

6. The leakage protection circuit breaker according to claim 3 or 5, characterized in that: The leakage protection unit (2) is further provided with a button spring. The reset button (7) compresses the button spring in the first position. When the unlocking member (6) unlocks the reset button (7), the button spring is released, and the button spring drives the reset button (7) to move to the second position.

7. The leakage protection circuit breaker according to claim 1, characterized in that: The leakage protection unit (2) is further provided with a test button (21), and the test button (21) and the reset button (7) are arranged on both sides of the indicator (8) relative to each other along the movement direction of the indicator (8).

8. The leakage protection circuit breaker according to claim 7, characterized in that: The leakage release (5) is arranged between a test button (21) and a reset button (7), and the indicator (8) is arranged on a side of the leakage release (5) away from the zero-sequence current transformer (4).

9. The leakage protection circuit breaker according to claim 1, characterized in that: The leakage release (5) is provided with a tripping rod (50) for driving the unlocking member (6) to move, and the moving direction of the tripping rod (50) is arranged parallel to the moving direction of the indicating member (8).

10. The leakage protection circuit breaker according to claim 1, characterized in that: The indicator (8) comprises an indicator plate (84) and a spring plate (85) arranged vertically. The indicator plate (84) is provided with a first mark (81) and a second mark (82). The side of the spring plate (85) close to the reset button (7) is provided with a sliding portion (86). The sliding portion (86) is provided with a sliding surface (83). The side of the spring plate (85) away from the sliding portion (86) contacts the reset spring (9). The reset spring (9) drives the indicator (8) to move through the spring plate (85).

11. The leakage protection circuit breaker according to claim 10, characterized in that: The width of the indicator plate (84) is smaller than the width of the spring plate (85). The indicator plate (84) is located on the side of the indicator hole (80). An extension plate (87) is provided between the side of the indicator plate (84) and the side of the spring plate (85). The extension plate (87) is connected between the indicator plate (84) and the spring plate (85).

12. The leakage protection circuit breaker according to claim 10, characterized in that: The housing (3) includes a first side plate (31) and a second side plate (32) that are arranged opposite to each other, and a partition plate (33) arranged between the first side plate (31) and the second side plate (32), the first side plate (31) is provided with a first sliding groove (34) for accommodating the indicator (8), the first side plate (31) is provided with a first limiting plate (35), and the partition plate (33) is provided with a second limiting plate (36), the first limiting plate (35) and the second limiting plate (36) respectively extend into the first sliding groove (34) and respectively slide with two opposite side edges of the spring plate (85) of the indicator (8).

13. The leakage protection circuit breaker according to claim 12, characterized in that: The first side plate (31) is provided with a second slide groove for accommodating a pressing portion (72) of the reset button (7), the second slide groove being connected to the first slide groove (34), and a pushing portion (73) inserted into the first slide groove (34) is provided on a side of the pressing portion (72) close to the first slide groove (34).

14. The leakage protection circuit breaker according to claim 3, characterized in that: The locking portion (71) includes an insertion portion (711) arranged parallel to the moving direction of the indicator (8), and a connecting portion (712) connected between the middle of the insertion portion (711) and the pressing portion (72); the unlocking member (6) is rotatably arranged and is provided with a driving hole for connecting to the leakage release (5), and a socket (60) for inserting the insertion portion (711).

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