Flat wire common mode inductor with high-voltage-resistant structure

Abstract

The utility model provides a flat wire common mode inductor with a high voltage resistant structure, which comprises an inductor mounting bracket, a magnetic core component and a flat coil, the flat coil is sleeved on the magnetic core component, the magnetic core component is fixedly arranged on the inductor mounting bracket, a wiring pin is arranged on the inductor mounting bracket, the flat coil is connected with the wiring pin, and the flat coil is connected with the wiring pin. The magnetic core assembly comprises a magnetic core insulating shell and a magnetic core body, the magnetic core body is arranged in the magnetic core insulating shell, and an insulating layer is arranged on the outer surface of the magnetic core body. Through the arrangement of the magnetic core insulating shell, double-layer insulation of the magnetic core body can be carried out in cooperation with the insulating layer, the voltage resistance of the magnetic core body is effectively improved, the insulating layer is protected, the possibility that the insulating material layer is broken down when the voltage between the coil and the magnetic core exceeds the voltage resistance value is avoided, and the service life of parts is prolonged; and the competitiveness of the product is improved.

Description

Technical Field

[0001] This utility model relates to the field of electronic components technology, specifically to a flat-wire common-mode inductor with a high-voltage resistant structure. Background Technology

[0002] A common-mode choke, also known as a common-mode current choke, is commonly used in the switching power supplies of electrical appliances to filter common-mode electromagnetic interference signals. In various circuit designs, common-mode chokes also serve as EMI filters, used to suppress the outward radiation of electromagnetic waves generated by high-speed signal lines.

[0003] Common mode inductors typically have two sets of coils wound on the core. The lead-out portion of each set of coils is connected to the live wire and the neutral wire, respectively. To prevent leakage and short circuits when the core is energized, an insulating material is sprayed onto the core during production. This ensures insulation between the core and the coils and protects the core from external environmental corrosion.

[0004] However, as people's needs change, the voltage value will be adjusted accordingly. When the voltage between the coil and the magnetic core exceeds the withstand voltage for a long time or there is a transient overvoltage, the sprayed insulation material will age faster and may be broken down, causing short circuit faults on the circuit board, making it unable to work properly, or even damaging other circuit components, affecting the user experience and hindering the improvement of product competitiveness. Utility Model Content

[0005] To address the problems in the prior art, this utility model provides a flat wire common mode inductor with a high voltage resistant structure, and places the microphone hole at the front end of the remote control's main housing, thus solving the problem that the insulating material of the existing flat wire common mode inductor is easily broken down.

[0006] This utility model discloses a flat wire common mode inductor with a high voltage resistant structure, including an inductor mounting bracket, a magnetic core assembly, and a flat coil. The flat coil is sleeved on the magnetic core assembly, and the magnetic core assembly is fixedly mounted on the inductor mounting bracket. The inductor mounting bracket is provided with terminals, and the flat coil is connected to the terminals. The magnetic core assembly includes a magnetic core insulating shell and a magnetic core body. The magnetic core body is disposed inside the magnetic core insulating shell, and an insulating layer is provided on the outer surface of the magnetic core body.

[0007] This utility model is further improved, and the magnetic core insulating shell includes a magnetic core insulating front shell and a magnetic core insulating rear shell, which are snap-fitted together.

[0008] This utility model is further improved, and the magnetic core body includes a vertical first winding post and a second winding post, and a horizontal first connecting post and a second connecting post, so that the magnetic core body is a square frame shape with a hollow center.

[0009] This utility model is further improved in that the magnetic core insulating shell and the magnetic core body have the same shape, and the inner walls of the magnetic core insulating front shell and the magnetic core insulating rear shell are provided with positioning bosses that cooperate with the magnetic core body.

[0010] This utility model is further improved by having two flat coils, namely a first flat coil and a second flat coil. The inductor mounting bracket includes a bracket base and a bracket stand plate disposed on the bracket base. A baffle plate is disposed on the bracket stand plate, and the baffle plate is disposed between the first flat coil and the second flat coil.

[0011] This utility model is further improved by providing multiple coil heat dissipation holes on the support plate, and the first flat coil and the second flat coil can cooperate with the coil heat dissipation holes for heat dissipation.

[0012] This utility model is further improved by having four terminals arranged in a U-shape. The four terminals are fixedly mounted on the lower end face of the inductor mounting bracket. The lower ends of the first flat coil and the second flat coil are electrically connected to the two terminals on the front side, and the upper ends of the first flat coil and the second flat coil are electrically connected to the two terminals on the rear side.

[0013] This utility model is further improved by providing two connecting guide grooves on the side of the support plate away from the flat coil, which respectively cooperate with the first flat coil and the second flat coil. The two connecting guide grooves are arranged in a figure-eight shape.

[0014] This utility model is further improved by providing guide notches on both sides of the front end of the support base to cooperate with the first flat coil and the second flat coil.

[0015] This utility model is further improved by providing multiple mounting positioning blocks on the lower end face of the inductor mounting bracket.

[0016] Compared with the prior art, the beneficial effects of this utility model are: it can effectively solve the problem that the insulation material of the flat wire common mode inductor is easily broken down in the prior art. By setting the magnetic core insulation shell, it can work with the insulation layer to achieve double insulation of the magnetic core body, effectively improve the withstand voltage of the magnetic core body, protect the insulation layer, avoid the possibility of the insulation layer being broken down when the voltage between the coil and the magnetic core exceeds the withstand voltage value, extend the service life of the component, and help improve the competitiveness of the product. Attached Figure Description

[0017] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the flat-wire common-mode inductor with a high-voltage resistant structure;

[0019] Figure 2 for Figure 1 Another perspective structural diagram;

[0020] Figure 3 This is a schematic diagram of the exploded structure of the flat-wire common-mode inductor with a high-voltage resistant structure. Detailed Implementation

[0021] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish different objects, not to describe a particular order.

[0022] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0024] like Figures 1-3As shown, the present invention relates to a flat common-mode inductor with a high-voltage resistant structure, comprising an inductor mounting bracket 1, a magnetic core assembly, and a flat coil. The flat coil is sleeved on the magnetic core assembly, which is fixedly mounted on the inductor mounting bracket 1. The inductor mounting bracket 1 is provided with a terminal 111, and the flat coil is connected to the terminal 111. The magnetic core assembly includes a magnetic core insulating shell 5 and a magnetic core body 2. The magnetic core body 2 is disposed inside the magnetic core insulating shell 5, and an insulating layer is provided on the outer surface of the magnetic core body 2.

[0025] By setting the magnetic core insulating shell 5, the magnetic core body 2 can be double-insulated in conjunction with the insulating layer, which effectively improves the withstand voltage of the magnetic core body 2, protects the insulating layer, and avoids the possibility of the insulating layer being broken down when the voltage between the coil and the magnetic core exceeds the withstand voltage value, thus extending the service life of the component and improving the competitiveness of the product.

[0026] The insulating outer shell is made of plastic.

[0027] The magnetic core insulating housing 5 includes a magnetic core insulating front housing 51 and a magnetic core insulating rear housing 52, which are snap-fitted together.

[0028] The magnetic core insulating front shell 51 and magnetic core insulating rear shell 52 are connected by a snap-fit ​​mechanism, which allows for quick assembly and disassembly by processing personnel.

[0029] The magnetic core body 2 includes a vertical first winding post and a second winding post, and a horizontal first connecting post and a second connecting post, making the magnetic core body 2 a square frame shape with a hollow center.

[0030] The magnetic core insulating outer shell 5 and the magnetic core body 2 have the same shape. The inner walls of the magnetic core insulating front shell 51 and the magnetic core insulating rear shell 52 are provided with positioning bosses 521 that cooperate with the magnetic core body 2.

[0031] By setting the positioning boss 521, the magnetic core body 2 can be effectively positioned, ensuring the positional stability of the magnetic core body 2.

[0032] The number of flat coils is two, namely the first flat coil 3 and the second flat coil 4. The inductor mounting bracket 1 includes a bracket base 11 and a bracket upright plate 12 disposed on the bracket base 11. A baffle plate 13 is disposed on the bracket upright plate 12, and the baffle plate is disposed between the first flat coil 3 and the second flat coil 4.

[0033] By setting the shield 13, the first flat coil 3 and the second flat coil 4 can be effectively isolated, avoiding mutual interference during operation.

[0034] The support plate 12 is provided with multiple coil heat dissipation holes 121, and the first flat coil 3 and the second flat coil 4 can cooperate with the coil heat dissipation holes 121 for heat dissipation.

[0035] The heat dissipation holes 121 in the coil enable smoother heat dissipation and reduce heat loss of the flat coil.

[0036] There are four terminals 111 arranged in a U-shape. The four terminals 111 are fixedly mounted on the lower end face of the inductor mounting bracket 1. The lower ends of the first flat coil 3 and the second flat coil 4 are electrically connected to the two terminals 111 on the front side, respectively. The upper ends of the first flat coil 3 and the second flat coil 4 are electrically connected to the two terminals 111 on the rear side, respectively.

[0037] The support plate 12 has two connecting guide grooves 122 on the side away from the flat coil, which respectively cooperate with the first flat coil 3 and the second flat coil 4. The two connecting guide grooves 122 are arranged in a figure-eight shape.

[0038] By setting the connecting guide groove 122, during installation, the wire ends of the upper ends of the first flat coil 3 and the second flat coil 4 are respectively placed in the corresponding connecting guide groove 122, and respectively soldered to the two terminal pins 111 on the rear side to achieve electrical connection.

[0039] By arranging the two connecting guide slots 122 in a figure-eight shape, the wire ends at the upper ends of the first flat coil 3 and the second flat coil 4 can be effectively isolated, avoiding the situation where the wire ends of the two flat coils are too close, which could lead to a common mode inductor malfunction. It can also ensure that the wire ends are as close as possible to the terminal 111 without affecting the flat coil output.

[0040] The front sides of the support base 11 are respectively provided with guide notches 112 that cooperate with the first flat coil 3 and the second flat coil 4.

[0041] By setting the guide notch 112, during installation, the wire ends of the lower ends of the first flat coil 3 and the second flat coil 4 are respectively placed in the corresponding guide notch 112 and soldered to the two front terminals 111 respectively to achieve electrical connection.

[0042] By setting the guide notches 112 on both sides of the front end of the bracket base 11, the wire ends of the first flat coil 3 and the second flat coil 4 can be effectively isolated, avoiding the situation where the wire ends of the two flat coils are too close, which could lead to a common mode inductor malfunction.

[0043] The lower end face of the inductor mounting bracket 1 is provided with multiple mounting positioning blocks 113, which can effectively fix the inductor mounting bracket 1.

[0044] During installation, the manufacturer first sprays an insulating layer onto the magnetic core body 2, then assembles the magnetic core insulating front shell 51 and magnetic core insulating rear shell 52 onto the magnetic core body 2 that has been sprayed with an insulating layer, and uses an automatic winding machine to wind the flat coil onto the magnetic core insulating shell 5; the magnetic core assembly with the flat coil wound is assembled onto the inductor mounting bracket 1; then the two ends of the first flat coil 3 and the second flat coil 4 are respectively tinned with the four terminals 111, and finally a flat wire common mode inductor is made.

[0045] As can be seen from the above, the beneficial effects of this utility model are: it can effectively solve the problem of easy breakdown of insulation material in the existing flat wire common mode inductor. By setting the magnetic core insulation shell 5, it can cooperate with the insulation layer to achieve double insulation of the magnetic core body, effectively improve the withstand voltage of the magnetic core body 2, protect the insulation layer, avoid the possibility of insulation material layer being broken down when the voltage between the coil and the magnetic core exceeds the withstand voltage value, extend the service life of the component, and help improve the competitiveness of the product.

[0046] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A flat-wire common-mode inductor with a high-voltage resistant structure, characterized in that: The device includes an inductor mounting bracket, a magnetic core assembly, and a flat coil. The flat coil is sleeved on the magnetic core assembly, and the magnetic core assembly is fixedly mounted on the inductor mounting bracket. The inductor mounting bracket is provided with terminals, and the flat coil is connected to the terminals. The magnetic core assembly includes a magnetic core insulating shell and a magnetic core body. The magnetic core body is disposed inside the magnetic core insulating shell, and an insulating layer is provided on the outer surface of the magnetic core body.

2. The flat-wire common-mode inductor with a high-voltage resistant structure according to claim 1, characterized in that: The magnetic core insulating shell includes a magnetic core insulating front shell and a magnetic core insulating rear shell, which are snap-fitted together.

3. The flat-wire common-mode inductor with a high-voltage resistant structure according to claim 2, characterized in that: The magnetic core body includes a vertical first winding post and a second winding post, and a horizontal first connecting post and a second connecting post, making the magnetic core body a square frame with a hollow center.

4. The flat-wire common-mode inductor with a high-voltage resistant structure according to claim 3, characterized in that: The magnetic core insulating outer shell and the magnetic core body have the same shape, and the inner walls of the magnetic core insulating front shell and the magnetic core insulating rear shell are provided with positioning bosses that cooperate with the magnetic core body.

5. The flat-wire common-mode inductor with a high-voltage resistant structure according to claim 1, characterized in that: The number of flat coils is two, namely a first flat coil and a second flat coil. The inductor mounting bracket includes a bracket base and a bracket stand plate disposed on the bracket base. A baffle plate is disposed on the bracket stand plate between the first flat coil and the second flat coil.

6. The flat-wire common-mode inductor with a high-voltage resistant structure according to claim 5, characterized in that: The support plate is provided with multiple coil heat dissipation holes, and the first flat coil and the second flat coil can cooperate with the coil heat dissipation holes for heat dissipation.

7. The flat-wire common-mode inductor with a high-voltage resistant structure according to claim 5, characterized in that: The number of terminals is four, and the four terminals are arranged in a U-shape. The four terminals are fixedly installed on the lower end face of the inductor mounting bracket. The lower ends of the first flat coil and the second flat coil are electrically connected to the two terminals on the front side, and the upper ends of the first flat coil and the second flat coil are electrically connected to the two terminals on the rear side.

8. The flat-wire common-mode inductor with a high-voltage resistant structure according to claim 7, characterized in that: The support plate is provided with two connecting guide grooves on the side away from the flat coil, which respectively cooperate with the first flat coil and the second flat coil. The two connecting guide grooves are arranged in a figure-eight shape.

9. The flat-wire common-mode inductor with a high-voltage resistant structure according to claim 7, characterized in that: The front ends of the bracket base are respectively provided with guide notches on both sides to cooperate with the first flat coil and the second flat coil.

10. The flat-wire common-mode inductor with a high-voltage resistant structure according to any one of claims 1-9, characterized in that: The lower end face of the inductor mounting bracket is provided with multiple mounting positioning blocks.

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