Test loop assembly and residual current operated circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a test loop assembly and a residual current operated circuit breaker, the test loop assembly comprises a circuit board, a mutual inductor, a wiring structure, a second wiring board, a torsion spring and a conductive member, the mutual inductor is electrically connected with the circuit board, the wiring structure comprises a first wiring board and a coil wiring board which are electrically connected with each other, the first wiring board and the second wiring board both penetrate through the mutual inductor, a contact part is arranged on the first wiring board or the coil wiring board, a wiring part is arranged on the second wiring board, and the mutual inductor is located between the contact part and the wiring part; the torsional spring comprises a first spring arm and a second spring arm, the first spring arm is in contact conduction with the circuit board, and the second spring arm and the contact part are arranged at an interval; and the conductive piece is in contact conduction with the wiring part and the circuit board, and the conductive piece is arranged outside the mutual inductor. According to the test loop assembly provided by the utility model, the test loop is composed of the circuit board, the torsion spring, the wiring structure, the second wiring board and the conductive member, the structure is simple, and the assembly is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field especially relates to a test loop subassembly and residual current operating circuit breaker. BACKGROUND

[0002] Residual current operating circuit breaker is generally used to connect, bear and break the current under normal working condition, and under the prescribed condition, when the residual current reaches the prescribed value, the mechanical switch electrical appliance makes the contact open.

[0003] In the related art, the residual current operating circuit breaker generally takes electricity through the mode that the wire is arranged in the mutual inductor and is welded with the circuit board to constitute the test loop that simulates the leakage current, and some test loops also have conductive springs, which are complex in structure, low in assembly efficiency, and not conducive to automatic assembly production. UTILITY MODEL CONTENTS

[0004] One purpose of the utility model is to provide a test loop subassembly, which is simple in structure and convenient to assemble.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A test loop subassembly is provided, comprising:

[0007] A circuit board;

[0008] A mutual inductor, which is electrically connected to the circuit board;

[0009] A wiring structure, comprising a first wiring board and a coil wiring board, the first wiring board is arranged in the mutual inductor and is electrically connected to the coil wiring board, the coil wiring board is used for electrically connecting a release, and the first wiring board or the coil wiring board is provided with a contact part;

[0010] A second wiring board, which is arranged in the mutual inductor, the second wiring board is provided with a wiring part, and the mutual inductor is located between the contact part and the wiring part;

[0011] A torsional spring, comprising a first spring arm and a second spring arm, the first spring arm is in contact with the circuit board, and the second spring arm is arranged in a spaced-apart manner with the contact part;

[0012] A conductive part, a first end of the conductive part is in contact with the wiring part, a second end of the conductive part is in contact with the circuit board, and the conductive part is arranged outside the mutual inductor;

[0013] Wherein, the second spring arm can be in contact with the contact part under the action of external force to form a test loop between the circuit board, the torsional spring, the wiring structure, the second wiring board and the conductive part.

[0014] Optionally, the contact part is provided with a contact block, and the contact part is in contact with the second spring arm through the contact block.

[0015] Optionally, the circuit board is provided with a first connecting hole.

[0016] The first spring arm comprises a first arm segment and a second arm segment arranged oppositely, the first arm segment and the second arm segment are arranged in the first connecting hole, and the first arm segment and the second arm segment are in abutment with the hole wall of the first connecting hole.

[0017] Optionally, the torsion spring further comprises a spring body, and the first spring arm and the second spring arm are arranged at two ends of the spring body.

[0018] The first spring arm further comprises an extension arm segment and a positioning arm segment, the spring body, the extension arm segment, the first arm segment, the second arm segment and the positioning arm segment are sequentially connected, and the first arm segment and the second arm segment are arranged at an angle with the extension arm segment and the positioning arm segment respectively.

[0019] Optionally, the second spring arm comprises a power taking arm segment arranged at an end portion, the power taking arm segment is arranged at an interval from the contact part, and the second spring arm is capable of making the peripheral portion of the power taking arm segment in contact with the contact part under the action of an external force.

[0020] Optionally, the torsion spring further comprises a spring body, and the first spring arm and the second spring arm are arranged at two ends of the spring body.

[0021] The second spring arm further comprises a third arm segment and at least one fourth arm segment which are sequentially and foldedly connected, the third arm segment is connected with the spring body, and the fourth arm segment at an end portion is connected with the power taking arm segment.

[0022] The third arm segment is capable of making the peripheral portion of the power taking arm segment in contact with the contact part under the action of an external force.

[0023] Another purpose of the utility model lies in providing a residual current operated circuit breaker, which comprises:

[0024] A base;

[0025] The test loop assembly is arranged in the base.

[0026] Optionally, the utility model further comprises a button which is in sliding connection with the base, and the button is capable of pushing the second spring arm to make the second spring arm in contact with the contact part.

[0027] Optionally, the utility model further comprises an elastic member which is connected with the button, and the elastic member makes the button always have a tendency of sliding away from the second spring arm.

[0028] Optionally, a guide groove is arranged on the base, and the second spring arm is arranged in the guide groove.

[0029] Beneficial effects: the test circuit assembly provided by the utility model, the test circuit is composed of a circuit board, a torsion spring, a wiring structure, a second wiring board and a conductive part, has simple structure, the conductive part does not pass through a mutual inductor, and the test circuit assembly is convenient to assemble, and the assembly efficiency is effectively improved.In addition, the deformation of the second spring arm under external force is controllable, and the position of the contact part is constant, so that the second spring arm and the contact part are conveniently contacted and conducted, that is, the test circuit is conveniently conducted.

[0030] The residual current operating circuit breaker provided by the utility model is convenient to assemble and conducive to realizing automatic assembly production through the arrangement of the test circuit assembly. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is the internal structure schematic view of the residual current operating circuit breaker provided by the utility model;

[0032] Figure 2 is a partial structure schematic view of the residual current operating circuit breaker provided by the utility model;

[0033] Figure 3 is another partial structure schematic view of the residual current operating circuit breaker provided by the utility model;

[0034] Figure 4 is the circuit diagram of the test circuit assembly provided by the utility model;

[0035] Figure 5 is the perspective structure schematic view of the torsion spring provided by the utility model;

[0036] Figure 6 is another perspective structure schematic view of the torsion spring provided by the utility model;

[0037] Figure 7 is the partial structure schematic view of the residual current operating circuit breaker provided by the utility model;

[0038] Figure 8 is the structure schematic view of the button provided by the utility model;

[0039] Figure 9 is still another partial structure schematic view of the residual current operating circuit breaker provided by the utility model.

[0040] In the drawings:

[0041] 100, circuit board; 110, first connecting hole; 120, second connecting hole;

[0042] 200, mutual inductor;

[0043] 301, first terminal block; 302, coil terminal block; 310, contact portion; 311, contact block;

[0044] 400, second terminal block;

[0045] 500, torsion spring; 510, first spring arm; 511, first arm segment; 512, second arm segment; 513, extension arm segment; 514, positioning arm segment; 520, second spring arm; 521, power taking arm segment; 522, third arm segment; 523, fourth arm segment; 530, spring body;

[0046] 600, conductive member;

[0047] 700, base; 710, guide groove; 711, first guide groove; 712, second guide groove;

[0048] 800, button; 810, chamfered surface;

[0049] 900, elastic member. DETAILED DESCRIPTION

[0050] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0051] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, 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 of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0052] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature in the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include 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 "below", "below" and "below" of the first feature in the second feature include 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.

[0053] In the description of the present embodiment, the terms "upper", "lower", "right", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0054] Referring to Figures 1 to 6 As shown, the present embodiment provides a test circuit assembly, which comprises a circuit board 100, a mutual inductor 200, a wiring structure, a second wiring board 400, a torsion spring 500, and a conductive piece 600.

[0055] Specifically, the mutual inductor 200 is electrically connected to the circuit board 100; the wiring structure comprises a first wiring board 301 and a coil wiring board 302, the first wiring board 301 is arranged through the mutual inductor 200 and is electrically connected to the coil wiring board 302, the coil wiring board 302 is used for electrically connecting a release device, and the first wiring board 301 or the coil wiring board 302 is provided with a contact portion 310.

[0056] Specifically, the second wiring board 400 is arranged through the mutual inductor 200, the second wiring board 400 is provided with a wiring portion (not shown), and the mutual inductor 200 is located between the contact portion 310 and the wiring portion.

[0057] Specifically, the torsion spring 500 comprises a first spring arm 510 and a second spring arm 520, the first spring arm 510 is in contact with the circuit board 100, and the second spring arm 520 is arranged in a spaced manner with the contact portion 310.

[0058] Specifically, a first end of the conductive piece 600 is in contact with the wiring portion, a second end of the conductive piece 600 is in contact with the circuit board 100, and the conductive piece 600 is arranged outside the mutual inductor 200.

[0059] In the embodiment, the second spring arm 520 is in contact with the contact portion 310 under the external force, so as to form a test loop between the circuit board 100, the torsion spring 500, the wiring structure, the second wiring board 400 and the conductive piece 600. The test loop is composed of the circuit board 100, the torsion spring 500, the wiring structure, the second wiring board 400 and the conductive piece 600, and the structure is simple. The conductive piece 600 does not pass through the mutual inductor 200, so that the assembly of the test loop component is facilitated, and the assembly efficiency is effectively improved. It can be understood that the test loop is composed of the circuit board 100, the torsion spring 500, the first wiring board 301, the second wiring board 400 and the conductive piece 600, or composed of the circuit board 100, the torsion spring 500, the coil wiring board 302, the first wiring board 301, the second wiring board 400 and the conductive piece 600. In addition, the deformation of the second spring arm 520 under the external force is controllable, and the position of the contact portion 310 is constant, so that the contact of the second spring arm 520 with the contact portion 310 is facilitated, that is, the conduction of the test loop is facilitated.

[0060] Specifically, the torsion spring 500 further comprises a spring body 530, and the first spring arm 510 and the second spring arm 520 are respectively arranged at two ends of the spring body 530.

[0061] In the embodiment, as shown in Figures 2 to 6 The circuit board 100 is provided with a first connecting hole 110. The first spring arm 510 comprises a first arm segment 511 and a second arm segment 512 which are oppositely arranged. The first arm segment 511 and the second arm segment 512 are both arranged in the first connecting hole 110, and the first arm segment 511 and the second arm segment 512 are both in abutment with the hole wall of the first connecting hole 110. It can be understood that the first arm segment 511 and the second arm segment 512 have a tendency to move away from each other, so as to effectively ensure the stable and reliable connection between the first spring arm 510 and the circuit board 100.

[0062] Specifically, the circuit board 100 is further provided with a second connecting hole 120, and the second end of the conductive piece 600 is arranged in the second connecting hole 120 and is tin soldered with the circuit board 100, so as to be stable and reliable.

[0063] Exemplarily, the conductive piece 600 can be a wire, so as to be connected with the wiring portion and the circuit board 100.

[0064] In an embodiment, the first spring arm 510 further comprises an extension arm segment 513 and a positioning arm segment 514, and the spring body 530, the extension arm segment 513, the first arm segment 511, the second arm segment 512 and the positioning arm segment 514 are sequentially connected, and the first arm segment 511 and the second arm segment 512 are arranged at an angle with the extension arm segment 513 and the positioning arm segment 514, respectively. In this embodiment, the extension arm segment 513 is arranged to adapt the positions of the first arm segment 511 and the second arm segment 512 to pass through the first connecting hole 110. Exemplarily, when the test circuit assembly is installed in the base 700 of the residual current circuit breaker, the extension arm segment 513 and the positioning arm segment 514 can abut against the base 700 to form a limit to stably arrange the first arm segment 511 and the second arm segment 512 in the first connecting hole 110.

[0065] In this embodiment, continuing to refer to Figures 2 to 6 As shown in the figure, the second spring arm 520 comprises a power taking arm segment 521 arranged at the end portion, and the power taking arm segment 521 is arranged at an interval with the contact portion 310, and the second spring arm 520 can be contacted and conducted by the power taking arm segment 521 and the contact portion 310 under the action of an external force, that is, the power taking arm segment 521 and the contact portion 310 have sufficient contact area to effectively ensure the stable and reliable conduction of the test circuit.

[0066] Specifically, the second spring arm 520 further comprises a third arm segment 522 and at least one fourth arm segment 523 which are sequentially and foldably connected, the third arm segment 522 is connected with the spring body 530, and the fourth arm segment 523 at the end portion is connected with the power taking arm segment 521. Among them, the third arm segment 522 can be contacted and conducted by the power taking arm segment 521 and the contact portion 310 under the action of an external force. In this embodiment, the third arm segment 522 and the at least one fourth arm segment 523 are arranged to relatively arrange the power taking arm segment 521 and the contact portion 310, and the third arm segment 522 can generate a small deformation amount under the action of an external force, so that the power taking arm segment 521 can be displaced by a large distance, facilitating the conduction of the test circuit, and in the case of disconnection of the test circuit, the power taking arm segment 521 and the contact portion 310 can maintain a large distance, effectively preventing the occurrence of accidental conduction of the test circuit.

[0067] In an embodiment, the thickness direction of the first terminal block 301 and the thickness direction of the coil terminal block 302 are the same thickness direction, and along the thickness direction, the size B1 of the contact portion 310 is greater than the thickness B2 of the first terminal block 301, or greater than the thickness B3 of the coil terminal block 302, or greater than or equal to the sum of the thickness of the first terminal block 301 and the thickness of the coil terminal block 302, effectively ensuring that the second spring arm 520 can be stably contacted and conducted with the contact portion 310 under the action of an external force, and effectively ensuring that the second spring arm 520 and the contact portion 310 have sufficient contact area.

[0068] In some embodiments, the first terminal block 301 is formed with a first bending portion on one side in the width direction, and the first bending portion is the contact portion 310, facilitating the molding manufacturing.

[0069] In some embodiments, the coil terminal block 302 is formed with a second bending portion on one side in the width direction, and the second bending portion is the contact portion 310, facilitating the molding manufacturing.

[0070] In some embodiments, the first terminal block 301 and the coil terminal block 302 are integrally formed.

[0071] In a feasible implementation, the contact portion 310 is provided with a contact block 311, and the contact portion 310 can be in contact with the second spring arm 520 through the contact block 311. In the thickness direction, the size B4 of the contact block 311 is greater than the thickness B2 of the first terminal block 301, or greater than the thickness B3 of the coil terminal block 302, or greater than or equal to the sum of the thickness of the first terminal block 301 and the thickness of the coil terminal block 302, effectively ensuring the stability of the test circuit in the conduction state. The contact block 311 can be the end of a wire in contact with the contact portion 310, and the wire can be the electromagnetic coil of the release device. Exemplarily, the contact portion 310 and the contact block 311 are connected by soldering.

[0072] Referring to Figures 1 to 9 The embodiment also provides a residual current circuit breaker, which comprises the base 700 and the test circuit assembly described above, and the test circuit assembly is arranged in the base 700. In the embodiment, the residual current circuit breaker is facilitated to be assembled and is beneficial to realize the automatic assembly production through the arrangement of the test circuit assembly.

[0073] Exemplarily, the base 700 is provided with a positioning groove (not shown) capable of accommodating the spring body 530, and / or the base 700 is provided with a positioning column (not shown) capable of penetrating the spring body 530, so as to facilitate the installation of the torsion spring 500.

[0074] In the embodiment, referring to Figures 6 to 9 The residual current circuit breaker further comprises a button 800 in sliding connection with the base 700, and the button 800 can push the second spring arm 520 to make the second spring arm 520 in contact with the contact portion 310, facilitating the operation.

[0075] In a feasible implementation, one end of the button 800 towards the second spring arm 520 is provided with a chamfered surface 810, and the button 800 is in abutment with the second spring arm 520 through the chamfered surface 810, so that the button 800 can be pressed more labor-saving to complete the conduction of the test circuit. Moreover, the arrangement of the chamfered surface 810 can reduce the wear of the button 800 caused by the relative sliding between the button 800 and the second spring arm 520.

[0076] In an implementable embodiment, the residual current circuit breaker further comprises a resilient member 900 connected with the button 800, the resilient member 900 makes the button 800 always have a tendency to slide away from the second spring arm 520, i.e. the button 800 can be reset by the elastic force of the resilient member 900 when not subjected to external force, disconnects the test circuit, and is stable and reliable.

[0077] Exemplarily, the resilient member 900 can be a spring.

[0078] In an implementable embodiment, as shown in Figure 2 and Figure 9 The base 700 is provided with a guide slot 710, the second spring arm 520 is arranged in the guide slot 710, and the guide slot 710 can guide the direction of the second spring arm 520 when subjected to external force, so that the second spring arm 520 can accurately contact and conduct with the contact part 310, and realize the conduction of the test circuit. Specifically, one of the fourth arm segments 523 of the second spring arm 520 is arranged in the guide slot 710.

[0079] Exemplarily, the guide slot 710 comprises a first guide slot 711, and one of the fourth arm segments 523 of the second spring arm 520 is arranged in the first guide slot 711, so that the power taking arm segment 521 can accurately contact and conduct with the contact part 310.

[0080] Exemplarily, the guide slot 710 further comprises a second guide slot 712, and the third arm segment 522 of the second spring arm 520 is arranged in the second guide slot 712, effectively preventing the third arm segment 522 from being separated from the chamfered surface 810 of the button 800.

[0081] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, readjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A test circuit assembly, characterized by, The utility model relates to a circuit board (100); Transformer (200) with the circuit board (100) electric connection; The first wiring board (301) is arranged in the transformer (200), and the first wiring board (301) is electrically connected with the coil wiring board (302), and the coil wiring board (302) is used to be electrically connected with the release device, and the first wiring board (301) or the coil wiring board (302) is provided with the contact part (310); Second wiring board (400) is arranged in the transformer (200), and the second wiring board (400) is provided with the wiring part, and the transformer (200) is located between the contact part (310) and the wiring part; Torsion spring (500) includes first spring arm (510) and second spring arm (520), and the first spring arm (510) is in contact with the circuit board (100) and is conducted, and the second spring arm (520) is arranged with the contact part (310) interval; Conductive part (600), the first end of the conductive part (600) is in contact with the wiring part and is conducted, and the second end of the conductive part (600) is in contact with the circuit board (100) and is conducted, and the conductive part (600) is arranged outside the transformer (200); Wherein, the second spring arm (520) can be in contact with the contact part (310) and be conducted under the action of external force, so that the circuit board (100), the torsion spring (500), the wiring structure, the second wiring board (400) and the conductive part (600) form a test loop. The contact part (310) is provided with the contact block (311), and the contact part (310) can be in contact with the second spring arm (520) and be conducted through the contact block (311).

2. The test circuit assembly of claim 1, wherein, The circuit board (100) is provided with the first connecting hole (110); 3. The test circuit assembly of claim 1, wherein, The first spring arm (510) includes oppositely arranged first arm segment (511) and second arm segment (512), and the first arm segment (511) and the second arm segment (512) are arranged in the first connecting hole (110), and the first arm segment (511) and the second arm segment (512) are in contact with the hole wall of the first connecting hole (110). The torsion spring (500) further includes spring body (530), and the both ends of the spring body (530) are respectively provided with the first spring arm (510) and the second spring arm (520); 4. The test circuit assembly of claim 3, wherein, The first spring arm (510) further includes extension arm segment (513) and positioning arm segment (514), and the spring body (530), the extension arm segment (513), the first arm segment (511), the second arm segment (512) and the positioning arm segment (514) are sequentially connected, and the plane where the first arm segment (511) and the second arm segment (512) are located is arranged at an angle with the extension arm segment (513) and the positioning arm segment (514) respectively. ​ 5. The test loop assembly of claim 1, wherein, The second spring arm (520) comprises a power taking arm segment (521) arranged at the end, the power taking arm segment (521) is arranged in interval with the contact part (310), and the second spring arm (520) can make the circumferential part of the power taking arm segment (521) contact and conduct with the contact part (310) under external force.

6. The test circuit assembly of claim 5, wherein, The torsion spring (500) further comprises a spring body (530), the first spring arm (510) and the second spring arm (520) are arranged at two ends of the spring body (530) respectively; The second spring arm (520) further comprises a third arm segment (522) and at least one fourth arm segment (523) connected in turn by bending, the third arm segment (522) is connected with the spring body (530), and the fourth arm segment (523) at the end is connected with the power taking arm segment (521); The third arm segment (522) can make the circumferential part of the power taking arm segment (521) contact and conduct with the contact part (310) under external force.

7. A residual current operated circuit breaker, characterized in that Comprise: A base (700); The test loop assembly as claimed in any one of claims 1-6 is arranged in the base (700).

8. The residual current circuit breaker according to claim 7, characterized in that, Further comprise a button (800) in sliding connection with the base (700), the button (800) can push the second spring arm (520) to make the second spring arm (520) contact and conduct with the contact part (310).

9. The residual current circuit breaker according to claim 8, characterized in that, Further comprise an elastic member (900) connected with the button (800), the elastic member (900) makes the button (800) always have a tendency to slide away from the second spring arm (520).

10. The residual current circuit breaker according to claim 7, characterized in that, The base (700) is provided with a guide groove (710), and the second spring arm (520) is arranged in the guide groove (710).

Images