Residual current operated circuit breaker

Abstract

The utility model relates to the technical field of low-voltage electric appliances, in particular to a residual current operated circuit breaker, which comprises a shell, a leakage test loop and a mounting rack, the leakage test loop and the mounting rack are arranged in the shell, the leakage test loop comprises a test resistor and a tablet spring, the test resistor comprises a first lead end, and the test resistor comprises a second lead end. And the first lead end is crimped between the mounting rack and the tablet spring. The first lead end is crimped in a pre-pressing manner to fix the test resistor mounting position, so that welding-free connection of the test resistor is realized, technical requirements are reduced, procedures are simplified, disassembly and assembly are facilitated, the assembly efficiency and operation convenience of the test resistor are effectively improved, welding defects such as pseudo soldering and welding spot cracking are avoided, and the safety is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field especially relates to a kind of residual current circuit breaker. BACKGROUND

[0002] Residual current circuit breaker is a kind of leakage protection device for detecting residual current in circuit and automatically cutting off power supply when it exceeds set value, it is mainly used to prevent electric shock accident and electrical fire, and is one of important electrical safety equipment. With its continuous development to safety, miniaturization, to ensure the stability, effectiveness and reliability of leakage protection, it is usually provided with leakage test loop inside, and leakage test loop realizes the environment of simulating residual current by connecting frame, resistance and wire parts, to achieve the function of periodically detecting leakage protection.

[0003] However, in the existing residual current circuit breaker, the test resistance in leakage test loop usually adopts welding connection mode, which has the security risks of multiple welding points, virtual welding and welding point breakage to some extent, and poor operation convenience. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of residual current circuit breaker, effectively improves the assembly efficiency and operation convenience of test resistance, and further improves safety.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a kind of residual current circuit breaker, comprising: shell and the leakage test loop and mounting bracket set in shell, leakage test loop includes test resistance and tablet spring, and test resistance includes first lead end, and first lead end is crimped between mounting bracket and tablet spring.

[0007] As a preferred technical scheme of the above residual current circuit breaker, mounting bracket is provided with first slot body and clamping groove communicated with first slot body, first lead end is inserted into first slot body, tablet spring is clamped in clamping groove, and is crimped to first lead end to make the peripheral portion of first lead end adhere to the inner wall of first slot body.

[0008] As a preferred technical scheme of the above residual current circuit breaker, residual current circuit breaker further includes connecting frame set in shell, and tablet spring abuts against the outer wall of connecting frame.

[0009] As a preferred technical scheme of the above residual current circuit breaker, tablet spring includes connection section, bending section and contact section connected in sequence, connection section is clamped in clamping groove, and contact section abuts against the outer wall of connecting frame.

[0010] As a preferred technical solution for the aforementioned residual current operated circuit breaker, the housing includes an end cover and a base. The end cover is disposed on the base, and a limiting member is provided inside the end cover. The limiting member abuts against the contact section so that the contact section fits against the terminal frame.

[0011] As a preferred technical solution of the aforementioned residual current operated circuit breaker, the pressure spring is provided with a first protrusion, and the inner wall of the slot is provided with a groove, with the first protrusion engaging in the groove.

[0012] As a preferred technical solution for the aforementioned residual current operated circuit breaker, the test resistor also includes a second lead terminal, and the leakage current test circuit also includes a fixing plate, with the second lead terminal crimped between the fixing plate and the mounting bracket.

[0013] As a preferred technical solution for the aforementioned residual current operated circuit breaker, the bottom end of the fixing plate is provided with a second protrusion, which abuts against the periphery of the second lead end.

[0014] And / or, the mounting bracket is provided with a second groove, and the periphery of the second lead end is attached to the inner wall of the second groove.

[0015] As a preferred technical solution for the aforementioned residual current operated circuit breaker, the residual current operated circuit breaker also includes a support frame, which is installed inside the housing and has multiple connection ends. The fixing plate has multiple mounting holes, and the multiple connection ends are inserted into the multiple mounting holes one by one.

[0016] As a preferred technical solution for the aforementioned residual current operated circuit breaker, the mounting bracket is provided with a mounting groove, and the test resistor is snapped into the mounting groove.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model provides a residual current operated circuit breaker, which includes a housing, a leakage current test circuit and a mounting bracket disposed within the housing, and a test resistor and a pressure spring. The test resistor includes a first lead end, which is crimped between the mounting bracket and the pressure spring. The first lead end is crimped using a pre-tightening method to fix the test resistor mounting position, achieving a weld-free connection of the test resistor, reducing technical requirements, simplifying procedures, facilitating assembly and disassembly, effectively improving the assembly efficiency and operational convenience of the test resistor, and avoiding welding defects such as incomplete soldering and solder joint cracking, further enhancing safety. Attached Figure Description

[0019] Figure 1 A schematic diagram of the residual current operated circuit breaker provided by this utility model;

[0020] Figure 2 Exploded view of the residual current operated circuit breaker provided by this utility model;

[0021] Figure 3 Part structure diagram of residual current circuit breaker provided by the utility model Figure 1 ;

[0022] Figure 4 Part structure diagram of residual current circuit breaker provided by the utility model Figure 2 ;

[0023] Figure 5 Part structure diagram of residual current circuit breaker provided by the utility model Figure 3 ;

[0024] Figure 6 Part structure diagram of residual current circuit breaker provided by the utility model Figure 4 ;

[0025] Figure 7 Structure diagram of mounting frame provided by the utility model

[0026] Figure 8 Structure diagram of tablet pressing spring provided by the utility model

[0027] Figure 9 Structure diagram of fixed plate provided by the utility model

[0028] Among them:

[0029] 1, shell; 100, end cover; 200, base;

[0030] 2, test resistance; 21, first lead end; 22, second lead end;

[0031] 3, mounting frame; 31, first groove body; 32, clamping groove; 321, recess; 33, second groove body; 34, slot hole;

[0032] 4, tablet pressing spring; 41, connecting section; 42, bending section; 43, contact section;

[0033] 5, wiring frame;

[0034] 6, limiting piece; 7, first protruding part;

[0035] 8, fixed plate; 801, mounting hole;

[0036] 9, second protruding part;

[0037] 10, support frame; 101, connecting end; 102, plug-in end;

[0038] 11, first clamping jaw; 12, second clamping jaw. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0040] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0041] Unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] Unless otherwise explicitly specified and limited, the first feature "above" or "below" the second feature can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0043] The technical solutions of the present application are further illustrated below by combining the drawings and through specific embodiments.

[0044] As Figures 1 to 9As shown, the embodiment provides a residual current circuit breaker, which comprises a shell 1, a leakage test loop arranged in the shell 1, and a mounting rack 3. The leakage test loop comprises a test resistor 2 and a sheet spring 4. The test resistor 2 comprises a first lead end 21, which is crimped between the mounting rack 3 and the sheet spring 4. In this way, the first lead end 21 of the test resistor 2 is fixed in the test resistor 2 mounting position by the mounting rack 3 and the sheet spring 4 in a pre-pressed manner, the welding-free connection of the test resistor 2 is realized, the technical requirements are reduced, the process is simplified, the disassembly and replacement are facilitated, the assembly efficiency and the operation convenience of the test resistor 2 are effectively improved, and welding defects such as virtual welding and cracking of welding points are avoided, and the safety is further improved. It can be understood that the leakage test loop can be connected to the main circuit of the residual current circuit breaker to form a leakage test circuit between the main circuit and the leakage test loop. The opening and closing of the residual current circuit breaker can realize the breaking of the main circuit.

[0045] In the embodiment, please refer to Figures 5 to 7 As shown, the mounting rack 3 is provided with a first groove 31 and a clamping groove 32 communicating with the first groove 31. The first lead end 21 is inserted into the first groove 31, and the sheet spring 4 is clamped in the clamping groove 32 and crimped on the first lead end 21 so that the peripheral part of the first lead end 21 is attached to the inner wall of the first groove 31. In this way, the sheet spring 4 is introduced to realize the pre-pressed fixation of the first lead end 21, which can realize greater elastic deformation in the limited space of the clamping groove 32, can provide the first lead end 21 with continuous and uniform contact pressure, ensure the stable connection between the test resistor 2 and the circuit, prevent the test resistor 2 from loosening due to vibration or temperature change, reduce the safety failure caused by poor contact, and the sheet spring 4 can be detachably installed in the clamping groove 32, facilitating disassembly and replacement, and further reducing the maintenance difficulty.

[0046] Optionally, please refer to Figure 3 As shown, in order to further improve the stability and reliability of the clamping of the sheet spring 4, the residual current circuit breaker further comprises a wiring frame 5 arranged in the shell 1, and the sheet spring 4 abuts against the outer wall of the wiring frame 5. The wiring frame 5 can be externally connected to an electrical equipment or a power supply.

[0047] Specifically, please refer to Figure 8As shown, in this embodiment, the following scheme is exemplarily given: the tablet pressing spring 4 is in a U shape, and the tablet pressing spring 4 comprises a connecting section 41, a bending section 42 and a contact section 43, which are sequentially connected, the connecting section 41 is clamped in the clamping groove 32, and the contact section 43 abuts against the outer wall of the terminal block 5. In this way, the bending structure is adopted to realize compact design, which can be applied to the application scenario with limited space, realize flexible layout, improve the space utilization, and at the same time, the bending design can disperse the stress of the tablet pressing spring 4 when it is stressed, ensure the contact reliability, avoid stress concentration, and prolong the service life. It should be noted that the bending angle, length and thickness of the tablet pressing spring 4 can be adjusted according to the specific situation to meet different performance requirements, which will not be limited further herein.

[0048] Optionally, referring to Figures 1 to 2 As shown, in order to improve the stability of the contact between the contact section 43 and the terminal block 5, the shell 1 comprises an end cover 100 and a base 200, the end cover 100 is arranged on the base 200, and the end cover 100 is provided with a limiting piece 6, the limiting piece 6 abuts against one side of the contact section 43 away from the terminal block 5, so that the contact section 43 is tightly attached to the terminal block 5. In this way, the limiting piece 6 provides a downward pressing force to ensure that the contact section 43 is tightly attached to the terminal block 5, and to a certain extent, the deviation of the contact section 43 is avoided.

[0049] Optionally, referring to Figure 5 and Figure 7 As shown, in order to realize the positioning and assembly of the tablet pressing spring 4 and the mounting frame 3, the top end of the tablet pressing spring 4 is provided with a first protruding part 7, the inner wall of the clamping groove 32 is recessed with a groove 321, and the first protruding part 7 is clamped in the groove 321. It can be understood that the bending section 42 and one end of the clamping groove 32 are positioned, and in the sliding direction of the connecting section 41 relative to the clamping groove 32, the first protruding part 7 abuts against the bottom wall of the groove 321 to form positioning with the other end of the clamping groove 32.

[0050] In this embodiment, referring to Figure 3 As shown, in order to further realize the pre-pressing positioning of the test resistor 2, the test resistor 2 further comprises a second lead end 22, and the leakage test circuit further comprises a fixing plate 8, and the second lead end 22 is crimped between the fixing plate 8 and the mounting frame 3.

[0051] Further, in order to strengthen the pressing and fixing effect of the test resistor 2, the bottom end of the fixing plate 8 is provided with a second protruding part 9, and the second protruding part 9 abuts against the peripheral part of the second lead end 22; and / or, the mounting frame 3 is provided with a second groove body 33, and the peripheral part of the second lead end 22 is attached to the inner wall of the second groove body 33.

[0052] In the embodiment, the second protruding part 9 abuts against the second lead end 22, so that the peripheral part of the second lead end 22 is attached to the inner wall of the second groove body 33, and at the same time, in order to realize the positioning of the fixing plate 8, the fixing plate 8 can extend into the second groove body 33.

[0053] Optionally, referring to Figure 3 With Figure 9 As shown in the figure, the residual current circuit breaker further comprises a support frame 10, which is installed in the shell 1, and a plurality of connecting ends 101 are arranged on the support frame 10, a plurality of mounting holes 801 are arranged on the fixing plate 8, and the plurality of connecting ends 101 and the plurality of mounting holes 801 are one-to-one correspondingly inserted and matched. Further, the connecting end 101 is in interference fit with the mounting hole 801. In this way, the support frame 10 is introduced to stably fix the fixing plate 8, and the stability of the crimping of the second lead end 22 is further enhanced. Wherein, the support frame 8 can be used as a supporting component of the operating mechanism of the residual current circuit breaker.

[0054] Optionally, in order to further improve the connection stability of the mounting rack 3, the mounting rack 3 is provided with a slot hole 34, and the support frame 10 is provided with an insertion end 102, which is inserted and matched with the slot hole 34.

[0055] Optionally, referring to Figure 6 As shown in the figure, in order to provide a fixed mounting position for the test resistor 2, the mounting rack 3 is provided with a mounting slot, and the test resistor 2 is clamped in the mounting slot. Further, the bottom end of the mounting rack 3 has a first clamping jaw 11 and a second clamping jaw 12, which are arranged in a spaced manner to form the mounting slot, and the test resistor 2 is clamped between the first clamping jaw 11 and the second clamping jaw 12. In this way, the first clamping jaw 11 and the second clamping jaw 12, as well as the uniform and firm clamping force, prevent the test resistor 2 from moving or falling off, ensure accurate positioning, and can realize quick clamping and release, reduce operation time, and improve assembly operation efficiency. It should be noted that the first clamping jaw 11 and the second clamping jaw 12 can be designed according to the shape and size of different test resistors 2 to adapt to various clamping needs.

[0056] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A residual current operated circuit breaker, characterized in that, include: The housing (1) and the leakage test circuit and the mounting bracket (3) disposed in the housing (1) include a test resistor (2) and a pressure spring (4). The test resistor (2) includes a first lead end (21), which is pressed between the mounting bracket (3) and the pressure spring (4).

2. The residual current operated circuit breaker according to claim 1, characterized in that, The mounting bracket (3) has a first groove (31) and a slot (32) communicating with the first groove (31). The first lead end (21) is inserted into the first groove (31). The pressure spring (4) is engaged in the slot (32) and pressed against the first lead end (21) so that the periphery of the first lead end (21) fits against the inner wall of the first groove (31).

3. The residual current operated circuit breaker according to claim 2, characterized in that, The residual current operated circuit breaker also includes a wiring frame (5) disposed in the housing (1), and the pressure spring (4) abuts against the outer wall of the wiring frame (5).

4. The residual current operated circuit breaker according to claim 3, characterized in that, The pressure spring (4) includes a connecting section (41), a bending section (42) and a contact section (43) connected in sequence. The connecting section (41) is engaged in the slot (32) and the contact section (43) abuts against the outer wall of the wiring frame (5).

5. The residual current operated circuit breaker according to claim 4, characterized in that, The housing (1) includes an end cap (100) and a base (200). The end cap (100) covers the base (200), and a limiting member (6) is provided inside the end cap (100). The limiting member (6) abuts against the contact section (43) so that the contact section (43) fits against the wiring frame (5).

6. The residual current operated circuit breaker according to claim 2, characterized in that, The pressure spring (4) is provided with a first protrusion (7), and the inner wall of the slot (32) is provided with a groove (321), and the first protrusion (7) is engaged in the groove (321).

7. The residual current operated circuit breaker according to any one of claims 1-6, characterized in that, The test resistor (2) also includes a second lead end (22), and the leakage test circuit also includes a fixing plate (8), with the second lead end (22) pressed between the fixing plate (8) and the mounting bracket (3).

8. The residual current operated circuit breaker according to claim 7, characterized in that, The bottom end of the fixing plate (8) is provided with a second protrusion (9), which abuts against the periphery of the second lead end (22); And / or, the mounting bracket (3) is provided with a second groove (33), and the periphery of the second lead end (22) is attached to the inner wall of the second groove (33).

9. The residual current operated circuit breaker according to claim 8, characterized in that, The residual current operated circuit breaker also includes a support frame (10), which is installed inside the housing (1). The support frame (10) is provided with multiple connecting ends (101), and the fixing plate (8) is provided with multiple mounting holes (801). The multiple connecting ends (101) are inserted into the multiple mounting holes (801) one by one.

10. The residual current operated circuit breaker according to any one of claims 1-6, characterized in that, The mounting bracket (3) is provided with a mounting groove, and the test resistor (2) is snapped into the mounting groove.

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