Residual-current circuit breaker

Abstract

The utility model discloses an electric leakage circuit breaker which comprises an electric leakage test loop, a test button and an upper shell. The test button is arranged in a sliding manner along the vertical direction and comprises a key part, a penetrating part and a triggering part; the key part is located in the mounting groove, and the upper surface of the key part is exposed on the upper surface of the upper shell so that a user can press the key part; a reset spring is arranged between the key part and the groove bottom of the mounting groove, so that the pressed test button is reset; an elastic inverted buckle is arranged on the penetrating part, the penetrating part penetrates through the upper opening during installation to enable the elastic inverted buckle to contract, and after the elastic inverted buckle penetrates out of the lower opening, the elastic inverted buckle resets and abuts against the inner wall of the upper shell at the lower opening, so that the test button is prevented from falling off from the upper shell; the movable end is located below the trigger part, and when the test button is pressed, the trigger part moves towards the movable end to enable the movable end to be in contact with the conducting strip; the test button installation structure has the advantage of being stable in test button installation.

Description

Technical Field

[0001] The present application relates to a leakage circuit breaker. Background Art

[0002] Small residual current circuit breakers (RCCBs) can provide leakage protection for circuits. There are many types of residual current circuit breakers available, including RCCBs (earth leakage circuit breakers) and RCCBs (electronic residual current circuit breakers).

[0003] Existing RCCBs have a leakage test function, such as the ground fault current or residual current circuit breaker test device system disclosed in CN102818988B. This device includes a square test button and a leakage test circuit. The leakage test circuit includes a test resistor, a special-shaped torsion spring, and a conductive clamp. The L-shaped end of the special-shaped torsion spring is normally open to the conductive clamp, and the straight end of the special-shaped torsion spring is welded to the test resistor. When the user presses the square test button, the square test button is pressed downward, causing the L-shaped end of the special-shaped torsion spring to contact the conductive clamp, thereby connecting the leakage test circuit and generating a simulated leakage current.

[0004] The test button of this structure has poor tightness with the circuit breaker housing mounting structure and is easy to fall off. Summary of the Invention

[0005] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide a leakage circuit breaker.

[0006] The present application provides: a leakage circuit breaker, which includes a leakage test circuit, a test button and an upper shell; wherein the upper surface of the upper shell has a sunken mounting groove, the bottom of the mounting groove has a first through hole, the first through hole has an upper opening at the bottom of the mounting groove, and the first through hole has a lower opening on the inner wall of the upper shell; the test button is slidably arranged in the vertical direction, and includes a button portion, a penetration portion and a trigger portion; the button portion is in the mounting groove, and the upper surface of the button portion is exposed on the upper surface of the upper shell for the user to press; a reset spring is provided between the button portion and the bottom of the mounting groove, so that after being pressed, the button portion is reset. The test button is reset; an elastic buckle is provided on the penetration part, and when installed, the penetration part is inserted from the upper opening to cause the elastic buckle to contract. As the elastic buckle is inserted from the lower opening, the elastic buckle is reset and rests on the inner wall of the upper shell at the lower opening to prevent the test button from falling off from the upper shell; the leakage test circuit includes a test resistor, a conductive reed and a conductive sheet, the conductive reed has a fixed end and a movable end, the fixed end is electrically connected to the test resistor, and the movable end and the conductive sheet are normally open; the movable end is below the trigger part, and when the test button is pressed, the trigger part moves toward the movable end so that the movable end contacts the conductive sheet.

[0007] In some embodiments of the present application, a spring mounting portion is provided on the trigger portion; it also includes a trigger spring, which is sleeved on the trigger portion, with one end abutting against the spring mounting portion and the other end abutting against the movable end. When the test button is pressed, the trigger spring is compressed and presses down the movable end so that it contacts the conductive sheet.

[0008] In some embodiments of the present application, a mechanism bracket and a reed bracket are also included, and the reed bracket is fixed on one side of the mechanism bracket; the conductive reed also includes a connecting section, which connects the fixed end and the movable end. The fixed end is detachably fixed on the reed bracket, and the movable end extends toward the bottom of the trigger part.

[0009] In some embodiments of the present application, the reed bracket includes a fixing portion, the fixing portion includes a first base and a second base, the first base and the second base form a embedding groove, and the opening direction of the embedding groove is away from the direction where the mechanism bracket is located; a bayonet is provided on the first base or the second base, and an elastic bayonet arm is provided on the fixed end, and the elastic bayonet arm is inserted into the bayonet to limit the fixed end from detaching from the reed bracket.

[0010] In some embodiments of the present application, the reed bracket also includes a fixing portion, a connecting portion and a guiding portion. The fixing portion and the guiding portion are connected through the connecting portion, and an avoidance hole is provided on the guiding portion. The fixing portion is used to install the fixed end, the guiding portion is located between the trigger portion and the movable end, and the avoidance hole is for the trigger spring and the trigger portion to pass through when sliding.

[0011] In some embodiments of the present application, a snap-fit ​​groove is provided on the guide portion; the mechanism bracket includes a mechanism side plate; the mechanism side plate is bent toward the direction of the spring bracket to form a snap-fit ​​portion, and the snap-fit ​​portion is inserted into the snap-fit ​​groove and snap-fitted with the snap-fit ​​groove.

[0012] In some embodiments of the present application, the direction in which the side plate of the mechanism is located toward the spring bracket is the second direction, and during installation, the clamping portion is clamped into the clamping slot along the second direction; after installation, the clamping slot and the clamping portion form a limit in the first direction and the third direction, the first direction is perpendicular to the second direction, and the third direction is perpendicular to the first direction and the second direction; the first direction is a vertical direction.

[0013] In some embodiments of the present application, the cross-sectional shape of the clamping portion is "U"-shaped or L-shaped;

[0014] In some embodiments of the present application, a first positioning portion is provided on the fixing portion, and a second positioning portion is provided on the side plate of the mechanism. The first positioning portion and the second positioning portion form a positioning fit, one of which is a protrusion and the other is a through hole.

[0015] In some embodiments of the present application, the guide portion has a sinking portion, which is arranged around the avoidance hole. The avoidance hole is located at the lowest point of the sinking portion to facilitate the trigger spring and the trigger portion to pass through the avoidance hole.

[0016] In some embodiments of the present application, a first angle is formed between the upper surface of the fixed end and the upper surface of the connecting section, and a second angle is formed between the lower surface of the connecting section and the lower surface of the movable end, the second angle is greater than the first angle, and both the first angle and the second angle are obtuse angles;

[0017] In some embodiments of the present application, the fixed end, the connecting section, and the movable end together form a "Z" shape.

[0018] In some embodiments of the present application, a lower shell is further included, which is fixed to the upper shell. A rotating shaft is rotatably provided on the lower shell, a moving contact is provided on the rotating shaft, and a conductive sheet is provided on the rotating shaft and is electrically connected to the moving contact.

[0019] In some embodiments of the present application, there are two elastic undercuts, and the two elastic undercuts are symmetrical.

[0020] Compared with the prior art, this application has the following advantages:

[0021] The above structure utilizes an elastic undercut design. During installation, the undercut is inserted through the upper opening and exits through the lower opening. The undercut then returns to rest against the inner wall of the upper housing at the lower opening. This ensures that the test button is stably mounted on the upper housing and does not easily fall off. This design facilitates installation and prevents the test button from falling off.

[0022] A conductive spring sheet is used to replace the torsion spring structure in the prior art. Compared with a torsion spring, the structure of the fixing part of this spring sheet directly to the housing will be simpler and does not require excessive rotation and bending like a torsion spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A three-dimensional diagram of an earth leakage circuit breaker according to an embodiment of the present application is shown;

[0025] Figure 2 A schematic diagram of an upper housing of a leakage circuit breaker according to an embodiment of the present application is shown;

[0026] Figure 3 A schematic diagram of a test button of a leakage circuit breaker in an embodiment of the present application is shown;

[0027] Figure 4 A cross-sectional view of a test button of a leakage circuit breaker in an embodiment of the present application is shown;

[0028] Figure 5 A schematic diagram showing a mechanical portion of a partial test circuit of a leakage circuit breaker in an embodiment of the present application is shown;

[0029] Figure 6 A three-dimensional diagram of the leakage circuit breaker according to the embodiment of the present application with the upper housing removed is shown;

[0030] Figure 7 A three-dimensional diagram of a conductive spring in a leakage circuit breaker according to an embodiment of the present application is shown;

[0031] Figure 8 A three-dimensional diagram of a conductive spring and a spring bracket in a leakage circuit breaker according to an embodiment of the present application is shown;

[0032] Figure 9 A three-dimensional diagram of a spring bracket in a leakage circuit breaker according to an embodiment of the present application is shown;

[0033] Figure 10 A three-dimensional view of the spring bracket in the leakage circuit breaker according to an embodiment of the present application is shown from another perspective;

[0034] Figure 11 A three-dimensional diagram of the spring bracket and the mechanism side plate in the leakage circuit breaker according to the embodiment of the present application is shown. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present application. Examples of these embodiments are illustrated in the accompanying drawings, where identical or similar reference numerals throughout represent identical or similar elements or elements having identical or similar functions. The embodiments described below with reference to the accompanying drawings are illustrative and intended only to explain the present application and are not to be construed as limiting the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0038] In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. Example

[0040] like Figure 1-11 As shown, an embodiment of the present application is a leakage circuit breaker, which includes an upper shell 100, a lower shell 200 and a leakage circuit breaker assembly arranged in the upper and lower shells 100, 200.

[0041] The upper housing 100 and the lower housing 200 are fastened together by bolts, forming a space inside, and the circuit breaker assembly is disposed in the space. Of course, in addition to bolt fastening, the upper housing 100 and the lower housing 200 can also be fastened by rivets or clamping, or a combination of these fastening methods.

[0042] Leakage circuit breaker components, including contact system, operating mechanism, arc extinguishing system, terminal blocks, zero-sequence transformer, circuit board and test button 300, etc.

[0043] The contact system includes a rotating shaft 400, a moving contact, a static contact and other components. The rotating shaft 400 is rotatably connected to the lower shell 200. The moving contact is arranged on the rotating shaft 400 and moves with the rotating shaft 400. The static contact is adapted to the moving contact. As the rotating shaft 400 rotates, the moving and static contacts contact and separate, thereby realizing the connection and disconnection of the circuit breaker.

[0044] The operating mechanism includes a mechanism side plate 500 and a mechanism assembly mounted within the mechanism side plate 500. The mechanism side plate 500 is fixed to the lower housing 200. The mechanism assembly is linked to the rotating shaft 400, and the rotation of the rotating shaft 400 is achieved through the mechanism assembly. The specific structure of the mechanism assembly is conventional in the art and will not be further described here.

[0045] The arc extinguishing system is arranged near the moving and static contacts and is used to extinguish the arc generated when the moving and static contacts are separated.

[0046] The circuit board contains a leakage protection circuit and a leakage test circuit. A zero-sequence transformer serves as the sampling element for the leakage protection circuit, collecting current parameters. The leakage protection circuit uses this current parameter to determine whether leakage current exists in the circuit. If so, the leakage protection circuit's trip device activates, causing the operating mechanism to trip.

[0047] The leakage test circuit includes a normally open circuit breaker, a test resistor, etc. When the normally open circuit breaker is closed, a simulated leakage current is generated. The zero-sequence transformer can sample the simulated leakage current, causing the trip unit to actuate, causing the operating mechanism to trip.

[0048] The above-mentioned leakage protection circuit and leakage test circuit are common knowledge in terms of circuit structure, and will not be described in detail here.

[0049] The mechanical structure of the leakage test circuit is the inventive point of this application and is described in detail below.

[0050] The upper surface of the upper shell 100 has a sunken installation groove 101, and a first through hole 102 is opened at the bottom of the installation groove 101. The first through hole 102 has an upper opening 102a at the bottom of the installation groove 101 and a lower opening 102b on the inner wall of the upper shell 100.

[0051] The test button 300 is arranged to slide vertically, and comprises a button portion 301 , a penetration portion 302 and a trigger portion 303 from top to bottom.

[0052] The button portion 301 is located in the mounting groove 101, and a return spring 304 is disposed between the button portion 301 and the bottom of the mounting groove 101. This allows the top surface of the button portion to be exposed on the top surface of the upper housing 100, allowing the user to manipulate the button portion 301. The return spring 304 resets the button portion 301 after the manipulation force is removed.

[0053] The penetration portion 302 is provided with two elastic undercuts 305, which are symmetrically arranged. During installation, the test button 300 is inserted into the mounting slot 101, and the trigger portion 303 and the penetration portion 302 are sequentially inserted into the first through hole 102. As the elastic undercut 305 abuts against the upper opening 102a, it begins to contract. As the penetration portion 302 continues to penetrate until the elastic undercut 305 exits the lower opening 102b, the elastic undercut 305 returns to rest against the inner wall of the upper housing 100 at the lower opening 102b. This abutment does not affect the downward movement of the test button 300 (normal pressing of the test button 300), but only prevents the test button 300 from falling off the upper housing 100. This elastic snap arrangement effectively improves the stability of the test button 300.

[0054] The leakage test circuit includes a test resistor, a conductive spring 601, and a conductive plate 602. The conductive plate 602 is mounted on the rotating shaft 400 (electrically connected to the movable contact), while the test resistor is housed within the lower housing 200. One end of the conductive spring 601 is a fixed end 601a, which is welded (electrically connected) to the test resistor. The movable end 601b forms a normally open circuit with the conductive plate 602. The movable end 601b is located below the trigger unit 303. When the test button 300 is pressed, the trigger unit 303 moves toward the movable end 601b, bringing it into contact with the conductive plate 602.

[0055] Here, the triggering part 303 may directly push the movable end 601 b to make contact with the conductive sheet 602 , or may use other components to make the movable end 601 b make contact with the conductive sheet 602 .

[0056] In this embodiment, a trigger spring 603 is used to bring the movable end 601b into contact with the conductive sheet 602. Specifically, a spring mounting portion 303a is provided on the trigger portion 303. The upper end of the trigger spring 603 is sleeved onto the trigger portion 303, while the lower end of the trigger spring 603 abuts against the movable end 601b. This utilizes the trigger spring 603 to compensate for the size of the trigger portion 303. Furthermore, the trigger spring 603 can be compressed, reducing the impact force of the test button 300 on the movable end 601b and improving the structural life of the test circuit.

[0057] Here, the conductive spring 601 is mounted on a spring bracket 604. Specifically, the spring bracket 604 is fixed on one side of the mechanism side plate 500.

[0058] The conductive spring 601 includes a fixed end 601a, a connecting section 601c and a movable end 601b. The fixed end 601a is detachably fixed to the spring bracket 604, and the movable end 601b extends toward the bottom of the trigger portion 303. Here, the overall shape formed by these three parts is a "Z" shape. Here, a first angle is formed between the upper surface of the fixed end 601a and the upper surface of the connecting section 601c, and a second angle is formed between the lower surface of the connecting section 601c and the lower surface of the movable end 601b. The second angle is greater than the first angle, and the first angle and the second angle are both obtuse angles. Such a spring structure is very simple and the molding is relatively simple, and only two bends are required.

[0059] The spring bracket 604 includes a fixing portion 604a, a connecting portion 604c, and a guiding portion 604b. Here, the fixing portion 604a and the guiding portion 604b are connected via the connecting portion 604c.

[0060] A first positioning portion 6040 is formed on the fixing portion 604a. The first positioning portion 6040 is positioned toward the mechanism side plate 500 and is a raised portion. The mechanism side plate 500 has a second positioning portion, which is a through-hole. The first positioning portion 6040 and the second positioning portion form a fixed fit, ensuring that the spring bracket 604 is properly positioned and assembled with the mechanism side plate 500.

[0061] The fixing portion 604a also includes a bezel 604a1, which is formed by the first base portion 604a2 and the second base portion 604a3. The bezel 604a1 opens away from the mechanism bracket. The first base portion 604a2 is positioned above the second base portion 604a3. A latch 604a4 is defined on the first base portion 604a2. The fixing end 601a has an elastic latch arm 601a1, which engages with the latch 604a4 to prevent the fixing end 601a from separating from the spring bracket 604. Here, the elastic latch arm 601a1 is formed by cutting and bending a portion of the fixed end 601a. ​​The elastic latch arm 601a1 is arranged at an angle, specifically, gradually tilting upward from the interior of the engaging groove 604a1 toward the opening of the engaging groove 604a1. This allows the elastic latch arm 601a1 to be pushed into the engaging groove 604a1 during assembly (deformation of the elastic latch arm 601a1 occurs), until the end (the highest position) of the elastic latch arm 601a1 moves into the latch notch 604a4, forming a snap connection. Of course, the latch notch 604a4 can also be provided on the second base portion 604a3, with the shape of the elastic latch arm 601a1 being modified accordingly. This mounting structure of the engaging groove 604a1, elastic latch arm 601a1, and latch notch 604a4 is highly advantageous and facilitates the design and assembly of the conductive spring 601.

[0062] The guide portion 604b has an escape hole 604b1 formed therein. The guide portion 604b is located between the trigger portion 303 and the movable end 601b. The escape hole 604b1 allows the trigger spring 603 and the trigger portion 303 to slide through. The guide portion 604b has a sunken portion 604b2 surrounding the escape hole 604b1. The escape hole 604b1 is located at the lowest point of the sunken portion 604b2. This structure facilitates the passage of the trigger spring 603 and the trigger portion 303 through the escape hole 604b1.

[0063] The mechanism side plate 500 includes a clamping portion 5001, formed by bending a portion of the mechanism side plate 500 toward (i.e., in the second direction) the direction of the spring bracket 604. The guide portion 604b is provided with a clamping groove 604b0. During installation, the clamping portion 5001 engages the clamping groove 604b0 along the second direction. After installation, the clamping groove 604b0 and the clamping portion 5001 form a fixed position in the first direction (i.e., vertical direction) and the third direction. The first direction is perpendicular to the second direction, and the third direction is perpendicular to both the first and second directions. The cross-section of the clamping portion 5001 is U-shaped or L-shaped.

[0064] Such a design of the engaging groove 604b0 and the engaging portion 5001 can make the installation of the mechanism side plate 500 and the spring bracket 604 more stable.

[0065] The above structure is applicable to a 2P-4P structure leakage circuit breaker.

[0066] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and integrate different embodiments or examples, and features of different embodiments or examples, described in this specification, unless otherwise inconsistent.

[0067] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A leakage circuit breaker comprising a leakage test circuit, a test button, and an upper housing; characterized in that: The upper surface of the upper shell has a sunken mounting groove, the bottom of the mounting groove has a first through hole, the first through hole has an upper opening at the bottom of the mounting groove, and the first through hole has a lower opening on the inner wall of the upper shell; the test button is slidably arranged along the vertical direction, and includes a button portion, a penetration portion and a trigger portion; the button portion is in the mounting groove, and the upper surface of the button portion is exposed on the upper surface of the upper shell for the user to press; a reset spring is provided between the button portion and the bottom of the mounting groove to reset the test button after being pressed; an elastic undercut is provided on the penetration portion During installation, the penetration portion is inserted through the upper opening to cause the elastic buckle to contract. As the elastic buckle is inserted through the lower opening, the elastic buckle is reset and rests against the inner wall of the upper shell at the lower opening to prevent the test button from falling off the upper shell. The leakage test circuit includes a test resistor, a conductive spring and a conductive sheet. The conductive spring has a fixed end and a movable end. The fixed end is electrically connected to the test resistor, and the movable end and the conductive sheet are normally open. The movable end is located below the trigger portion. When the test button is pressed, the trigger portion moves toward the movable end so that the movable end contacts the conductive sheet.

2. A leakage circuit breaker according to claim 1, characterized in that: A spring mounting portion is provided on the trigger portion; it also includes a trigger spring, which is sleeved on the trigger portion with one end abutting against the spring mounting portion and the other end abutting against the movable end. When the test button is pressed, the trigger spring is compressed and presses down the movable end to make it contact with the conductive sheet.

3. The leakage circuit breaker according to claim 2, characterized in that: It also includes a mechanism bracket and a reed bracket, which is fixed on one side of the mechanism bracket; the conductive reed also includes a connecting section, which connects the fixed end and the movable end. The fixed end is detachably fixed on the reed bracket, and the movable end extends toward the bottom of the trigger part.

4. The leakage circuit breaker according to claim 3, characterized in that: The spring bracket includes a fixing portion, which includes a first base and a second base. The first base and the second base form an embedding groove, and the opening direction of the embedding groove is away from the direction where the mechanism bracket is located; a bayonet is provided on the first base or the second base, and an elastic bayonet arm is provided on the fixed end, and the elastic bayonet arm is engaged with the bayonet to limit the fixed end from separating from the spring bracket.

5. The leakage circuit breaker according to claim 3, characterized in that: The spring bracket also includes a fixing part, a connecting part and a guiding part. The fixing part and the guiding part are connected through the connecting part, and an avoidance hole is provided on the guiding part. The fixing part is used to install the fixed end, and the guiding part is located between the triggering part and the movable end. The avoidance hole is for the triggering spring and the triggering part to pass through when sliding.

6. The leakage circuit breaker according to claim 5, characterized in that: The guide portion is provided with a clamping groove; the mechanism bracket includes a mechanism side plate; the mechanism side plate is bent toward the direction where the spring bracket is located to form a clamping portion, and the clamping portion is inserted into the clamping groove and clamped with the clamping groove.

7. The leakage circuit breaker according to claim 6, characterized in that: The direction of the mechanism side plate toward the spring bracket is the second direction, and during installation, the clamping portion is clamped into the clamping groove along the second direction; after installation, the clamping groove and the clamping portion form a limit in the first direction and the third direction, the first direction is perpendicular to the second direction, and the third direction is perpendicular to the first direction and the second direction; the first direction is the vertical direction.

8. The leakage circuit breaker according to claim 6, characterized in that: The cross-sectional shape of the clamping portion is "U"-shaped or L-shaped; And / or, a first positioning portion is provided on the fixing portion, and a second positioning portion is provided on the side plate of the mechanism, the first positioning portion and the second positioning portion form a positioning fit, one of the two is a protrusion and the other is a through hole.

9. The leakage circuit breaker according to claim 5, characterized in that: The guide portion is provided with a sinking portion which is arranged around the avoidance hole. The avoidance hole is located at the lowest point of the sinking portion, so as to facilitate the trigger spring and the trigger portion to pass through the avoidance hole.

10. The leakage circuit breaker according to claim 3, characterized in that: A first angle is formed between the upper surface of the fixed end and the upper surface of the connecting section, and a second angle is formed between the lower surface of the connecting section and the lower surface of the movable end, the second angle is greater than the first angle, and the first angle and the second angle are both obtuse angles; or, the fixed end, the connecting section and the movable end together form a "Z" shape; or, it also includes a lower shell, the lower shell is fixed to the upper shell, a rotating shaft is rotatably provided on the lower shell, a moving contact is provided on the rotating shaft, and a conductive sheet is provided on the rotating shaft and is electrically connected to the moving contact; or, the number of elastic undercuts is two, and the two elastic undercuts are symmetrical.

Images