Mutual inductor
By designing the support frame fixed circuit board in the residual current protection circuit breaker, the problem of easy pulling of the wires connected to the transformer and circuit board is solved, and the stability of electrical connection and the convenience of assembly are achieved.
Patent Information
- Application Number
- CN202420040961.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-08
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-01-08
AI Technical Summary
In existing residual current protection circuit breakers, the connecting wires between the transformer and the circuit board are easily pulled, affecting the stability of the electrical connection.
A transformer is designed, using a support frame to fix the circuit board, so that it is assembled into one with the cover to avoid pulling the connecting wire.
It effectively prevents the connection wire between the transformer and the circuit board from being pulled, ensures the stability of the electrical connection, and facilitates the assembly and separation between the circuit board and the shell.
Smart Images
Figure CN222462511U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a mutual inductor. Background Art
[0002] Residual current operated circuit breakers are mechanical switch electrical appliances used to connect, carry and disconnect currents under normal working conditions, and to disconnect contacts when the residual current reaches a specified value under specified conditions. Residual current operated circuit breakers can quickly cut off fault power in a very short time to protect the safety of people and electrical equipment.
[0003] Among them, the residual current protection circuit breaker generally includes a circuit breaker unit and a leakage protection unit. The circuit breaker unit can realize the on and off of the circuit, as well as the short-circuit protection of the circuit, and push the circuit breaker mechanism to open through the action of the electromagnetic release. The leakage protection unit detects the leakage current in the circuit through the zero-sequence current transformer, and then after the setting of the control circuit board, the control circuit board outputs the voltage to the electromagnetic release, thereby opening the circuit breaker mechanism.
[0004] In the prior art, the transformer and the circuit board are usually fixed at different positions inside the housing of the residual current protection circuit breaker. When the residual current protection circuit breaker is assembled, the connecting wires between the transformer and the circuit board may interfere with the assembly of other components, and the connecting wires may be pulled and damaged, affecting the stability of the electrical connection between the transformer and the circuit board. Utility Model Content
[0005] The utility model aims to provide a mutual inductor, which can effectively prevent the connecting wire between the mutual inductor and the circuit board from being pulled, so as to ensure the electrical connection stability between the mutual inductor and the circuit board.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] A mutual inductor is provided, comprising:
[0008] The cover shell comprises a shell body and a support frame arranged outside the shell body, wherein the support frame is used to fix the circuit board;
[0009] The coil is arranged in the shell body, and the coil can be electrically connected to the circuit board.
[0010] Optionally, the support frame includes a first limiting plate and a second limiting plate arranged at an interval, a first limiting portion is arranged on a side of the first limiting plate facing the second limiting plate, and a second limiting portion is arranged on a side of the second limiting plate facing the first limiting plate, and the first limiting portion and the second limiting portion can limit the circuit board between the first limiting plate and the second limiting plate;
[0011] Optionally, a first inclined surface is provided at an end of the first limiting portion, and the first inclined surface is inclined from a side facing away from the shell body to a side facing the shell body;
[0012] A second inclined surface is disposed at the end of the second limiting portion, and the second inclined surface is inclined from a side facing the shell body to a side facing away from the shell body.
[0013] Optionally, a width B1 of the first limiting plate is greater than a width B2 of the second limiting plate, and an extension length L1 of the first limiting portion is less than an extension length L2 of the second limiting portion.
[0014] Optionally, a width b of the first limiting portion is smaller than a width B1 of the first limiting plate.
[0015] Optionally, the shell body is cylindrical, the first limiting plate and the second limiting plate are arranged in parallel, and the first limiting plate is tangent to the periphery of the shell body.
[0016] Optionally, the support frame also includes a third limiting plate, which is vertically arranged with respect to the first limiting plate, and the first end of the third limiting plate, the shell body and the second limiting plate intersect, the second end of the third limiting plate is connected to the side of the first limiting plate toward the second limiting plate, and the circuit board can be placed between the first limiting portion, the second limiting portion and the third limiting plate.
[0017] Optionally, a mounting groove is provided at the first end of the cover shell, a column is protruding from the bottom of the mounting groove, the coil is arranged in the mounting groove, the coil is sleeved on the column, and a wire passing hole is provided on the column, and the wire passing hole is used to pass a conductor.
[0018] Optionally, the second end of the shell body is provided with a plurality of first limiting grooves corresponding one-to-one to the conductors, the end of the column is provided with a plurality of second limiting grooves corresponding one-to-one to the conductors, and the conductors are passed through the corresponding first limiting grooves and the second limiting grooves.
[0019] Optionally, the column is provided with a plurality of the wire-passing holes, and the wire-passing holes are used to pass the conductors in a one-to-one correspondence; or
[0020] A phase-pole separator is inserted into the wire-passing hole, and a plurality of wire-passing channels are formed between the phase-pole separator and the inner surface of the wire-passing hole. The wire-passing channels are used to insert the conductors in a one-to-one correspondence.
[0021] Optionally, it further comprises a cover plate which is covered on the first end of the shell body, and an insulating partition is arranged on the cover plate, and the insulating partition is used to separate the conductor from the circuit board.
[0022] Beneficial effects:
[0023] The transformer provided by the utility model can fix the circuit board on the support frame, so that the cover shell and the circuit board are assembled into one body, effectively preventing the connecting wire between the transformer and the circuit board from being pulled, so as to ensure the stability of the electrical connection between the transformer and the circuit board. In addition, the circuit board is arranged outside the shell body, which facilitates the assembly and separation between the circuit board and the cover shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a structural schematic diagram of a mutual inductor provided by the utility model from one perspective;
[0025] Figure 2 It is a structural schematic diagram of the support frame provided by the utility model;
[0026] Figure 3 This is a schematic diagram of the structure of the cover provided by the utility model from one perspective;
[0027] Figure 4 This is a schematic structural diagram of the cover provided by the utility model from another viewing angle;
[0028] Figure 5 This is a schematic structural diagram of another viewing angle of the mutual inductor provided by the utility model;
[0029] Figure 6 The utility model is a schematic structural diagram of a phase-pole separator provided through a wire hole.
[0030] In the figure:
[0031] 10. Circuit board; 20. Conductor;
[0032] 100, cover;
[0033] 200, shell body; 201, mounting slot; 202, first limiting slot; 210, column; 211, wire hole; 212, second limiting slot;
[0034] 300, support frame; 310, first limiting plate; 311, first limiting portion; 3111, first inclined surface; 320, second limiting plate; 321, second limiting portion; 3211, second inclined surface; 330, third limiting plate;
[0035] 400, cover plate; 410, insulating partition;
[0036] 500, phase-pole separator; 510, line passage. DETAILED DESCRIPTION
[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0041] Reference Figures 1 to 5 As shown, this embodiment provides a mutual inductor, which includes a cover 100 and a coil (not shown), the cover 100 includes a shell body 200 and a support frame 300 arranged outside the shell body 200, and the support frame 300 is used to fix the circuit board 10; the coil is arranged in the shell body 200, and the coil can be electrically connected to the circuit board 10.
[0042] In this embodiment, the circuit board 10 can be fixed on the support frame 300, so that the cover 100 and the circuit board 10 are assembled into one, effectively preventing the connecting wires between the transformer and the circuit board 10 from being pulled, so as to ensure the stability of the electrical connection between the transformer and the circuit board 10. In addition, the circuit board 10 is arranged outside the shell body 200, which facilitates the assembly and separation between the circuit board 10 and the cover 100.
[0043] In this embodiment, continue to refer to Figure 1 and Figure 2 As shown, the support frame 300 includes a first limiting plate 310 and a second limiting plate 320 which are spaced apart. A first limiting portion 311 is provided on the side of the first limiting plate 310 facing the second limiting plate 320, and a second limiting portion 321 is provided on the side of the second limiting plate 320 facing the first limiting plate 310. The first limiting portion 311 and the second limiting portion 321 can limit the circuit board 10 between the first limiting plate 310 and the second limiting plate 320.
[0044] In this embodiment, the first limiting portion 311 and the second limiting portion 321 can limit the circuit board 10 between the first limiting plate 310 and the second limiting plate 320, that is, the cover 100 fixes the circuit board 10 through the support frame 300, so that the cover 100 and the circuit board 10 are assembled into one, effectively preventing the connecting wires between the transformer and the circuit board 10 from being pulled, so as to ensure the stability of the electrical connection between the transformer and the circuit board 10, and facilitate the assembly and separation between the circuit board 10 and the cover 100.
[0045] In a possible implementation, Figure 3 As shown, the width B1 of the first limiting plate 310 is greater than the width B2 of the second limiting plate 320 , and the extension length L1 of the first limiting portion 311 is less than the extension length L2 of the second limiting portion 321 , which can form a gap to facilitate the assembly of the circuit board 10 on the support frame 300 .
[0046] Furthermore, the width b of the first limiting portion 311 is smaller than the width B1 of the first limiting plate 310 , which can make it easier to assemble the circuit board 10 on the support frame 300 .
[0047] In a possible implementation, Figure 2As shown, the end of the first limiting portion 311 is provided with a first inclined surface 3111, and the first inclined surface 3111 is inclined from the side facing away from the shell body 200 to the side facing the shell body 200; the end of the second limiting portion 321 is provided with a second inclined surface 3211, and the second inclined surface 3211 is inclined from the side facing the shell body 200 to the side facing away from the shell body 200. It can be understood that the first inclined surface 3111 and the second inclined surface 3211 have the same inclination direction. When installing the circuit board 10, the circuit board 10 can be tilted to facilitate the placement of the circuit board 10 between the first limiting plate 310 and the second limiting plate 320.
[0048] In a possible implementation, Figure 2 As shown, the shell body 200 is cylindrical, the first limiting plate 310 and the second limiting plate 320 are arranged in parallel, and the first limiting plate 310 is tangent to the periphery of the shell body 200, so that the structure of the cover 100 is compact and makes way for other components in the residual current operated circuit breaker.
[0049] In a possible implementation, Figure 2 As shown, the support frame 300 further includes a third limiting plate 330, which is arranged vertically with the first limiting plate 310, and the first end of the third limiting plate 330, the shell body 200 and the second limiting plate 320 intersect each other, and the second end of the third limiting plate 330 is connected to the first limiting plate 310 facing the side of the second limiting plate 320, so that the structure of the support frame 300 is stable and reliable. In addition, the circuit board 10 can be placed between the first limiting portion 311, the second limiting portion 321 and the third limiting plate 330, and the third limiting plate 330 provides support for the circuit board 10, effectively ensuring that the circuit board 10 is stably fixed on the support frame 300.
[0050] In this embodiment, refer to Figure 1 , Figure 4 and Figure 5 As shown, a mounting groove 201 is provided at the first end of the shell body 200, a column 210 is convexly provided at the bottom of the mounting groove 201, the coil is arranged in the mounting groove 201, and the coil is sleeved on the column 210 to fix the coil in the mounting groove 201, so as to facilitate the assembly of the coil. Furthermore, a wire hole 211 is provided on the column 210, and the wire hole 211 is used to pass the conductor 20, that is, the conductor 20 passes the coil, and the coil is separated from the conductor 20 by the arrangement of the column 210, so as to improve the safety performance of the mutual inductor.
[0051] Specifically, the mutual inductor further includes a cover plate 400 covering the first end of the shell body 200. Exemplarily, the column 210 may be inserted through the cover plate 400, and the end of the column 210 protrudes from the cover plate 400.
[0052] Specifically, the second end of the shell body 200 is provided with a plurality of first limiting grooves 202 corresponding to the conductors 20, and the end of the column 210 is provided with a plurality of second limiting grooves 212 corresponding to the conductors 20, and the conductors 20 are inserted into the corresponding first limiting grooves 202 and second limiting grooves 212. In this embodiment, by providing the first limiting grooves 202 and the second limiting grooves 212, the adjacent conductors 20 can be separated, and the safety performance of the mutual inductor can be further improved. In addition, the conductors 20 are provided in the corresponding limiting grooves, which can prevent the conductors 20 from interfering with the operation of the circuit board 10.
[0053] In some embodiments, Figure 5 As shown, the cover plate 400 is provided with an insulating partition 410, which is used to separate the conductor 20 from the circuit board 10, so as to further prevent the conductor 20 from interfering with the operation of the circuit board 10. In other embodiments, the cover plate 400 may be provided with a plurality of third limiting grooves (not shown) connected to the second limiting grooves 212, and the adjacent conductors 20 may be better separated by the third limiting grooves, and the conductors 20 may be further prevented from interfering with the operation of the circuit board 10.
[0054] In some embodiments, Figure 4 and Figure 5 As shown, the column 210 is provided with a plurality of wire holes 211, which are used to pass the conductors 20 one by one, so as to further separate the adjacent conductors 20 and further improve the safety performance of the mutual inductor. The wire holes 211 can be connected with the corresponding first limiting groove 202 and the corresponding second limiting groove 212.
[0055] In other embodiments, Figure 6 As shown, a phase-pole separator 500 is inserted into the wire hole 211, and a plurality of wire-passing channels 510 are formed between the phase-pole separator 500 and the inner surface of the wire hole 211. The wire-passing channels 510 are used to pass the conductors 20 one by one, so as to further separate the adjacent conductors 20 and further improve the safety performance of the mutual inductor. Among them, the wire-passing channels 510 can be connected with the corresponding first limiting groove 202 and the corresponding second limiting groove 212. In this embodiment, the phase-pole separator 500 is detachably inserted into the wire hole 211, and the phase-pole separator 500 can be set in multiple models. The number of wire-passing channels 510 formed between the phase-pole separator 500 and the inner surface of the wire hole 211 can be changed by replacing the phase-pole separator 500, thereby improving applicability.
[0056] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A mutual inductor, characterized in that: include: A cover shell (100) comprises a shell body (200) and a support frame (300) arranged outside the shell body (200), wherein the support frame (300) is used to fix a circuit board (10); The coil is arranged in the shell body (200), and the coil can be electrically connected to the circuit board (10).
2. The mutual inductor according to claim 1, characterized in that: The support frame (300) comprises a first limiting plate (310) and a second limiting plate (320) which are arranged at an interval, wherein a first limiting portion (311) is arranged on a side of the first limiting plate (310) facing the second limiting plate (320), and a second limiting portion (321) is arranged on a side of the second limiting plate (320) facing the first limiting plate (310), and the first limiting portion (311) and the second limiting portion (321) can limit the circuit board (10) between the first limiting plate (310) and the second limiting plate (320).
3. The mutual inductor according to claim 2, characterized in that: A first inclined surface (3111) is provided at the end of the first limiting portion (311), and the first inclined surface (3111) is inclined from a side facing away from the shell body (200) to a side facing the shell body (200); A second inclined surface (3211) is provided at the end of the second limiting portion (321), and the second inclined surface (3211) is inclined from a side facing the shell body (200) to a side facing away from the shell body (200).
4. The mutual inductor according to claim 2, characterized in that: The width B1 of the first limiting plate (310) is greater than the width B2 of the second limiting plate (320), and the extension length L1 of the first limiting portion (311) is less than the extension length L2 of the second limiting portion (321).
5. The mutual inductor according to claim 2, characterized in that: The width b of the first limiting portion (311) is smaller than the width B1 of the first limiting plate (310).
6. The mutual inductor according to claim 2, characterized in that: The shell body (200) is cylindrical, the first limiting plate (310) and the second limiting plate (320) are arranged in parallel, and the first limiting plate (310) is tangent to the periphery of the shell body (200).
7. The mutual inductor according to claim 2, characterized in that: The support frame (300) also includes a third limiting plate (330), which is vertically arranged with respect to the first limiting plate (310), and the first end of the third limiting plate (330), the shell body (200) and the second limiting plate (320) intersect each other, and the second end of the third limiting plate (330) is connected to the side of the first limiting plate (310) facing the second limiting plate (320), and the circuit board (10) can be placed between the first limiting portion (311), the second limiting portion (321) and the third limiting plate (330).
8. The mutual inductor according to any one of claims 1 to 7, characterized in that: The first end of the cover shell (100) is provided with a mounting groove (201), the bottom of the mounting groove (201) is provided with a column (210), the coil is arranged in the mounting groove (201), the column (210) is sleeved with the coil, and the column (210) is provided with a wire hole (211), and the wire hole (211) is used for passing the conductor (20).
9. The mutual inductor according to claim 8, characterized in that: The second end of the shell body (200) is provided with a plurality of first limiting grooves (202) corresponding one-to-one to the conductors (20), and the end of the column (210) is provided with a plurality of second limiting grooves (212) corresponding one-to-one to the conductors (20), and the conductors (20) are passed through the corresponding first limiting grooves (202) and the second limiting grooves (212).
10. The mutual inductor according to claim 8, characterized in that: The column (210) is provided with a plurality of wire-passing holes (211), and the wire-passing holes (211) are used to pass the conductors (20) in a one-to-one correspondence; or A phase-pole separator (500) is inserted into the wire-passing hole (211), and a plurality of wire-passing channels (510) are formed between the phase-pole separator (500) and the inner surface of the wire-passing hole (211). The wire-passing channels (510) are used to insert the conductors (20) in a one-to-one correspondence.
11. The mutual inductor according to any one of claims 1 to 7, characterized in that: It also includes a cover plate (400) that is covered on the first end of the shell body (200), and an insulating partition (410) is arranged on the cover plate (400), and the insulating partition (410) is used to separate the conductor (20) and the circuit board (10).