Common mode inductor

Abstract

The utility model relates to the technical field of common mode inductors, and provides a common mode inductor which comprises a base, a plug board and a magnetic core assembly, and the magnetic core assembly comprises a magnetic core, a magnetic core protection shell and a winding. The inserting plate comprises an inserting plate body and two limiting matching pieces, one limiting matching piece is connected with the base, two limiting clamping grooves are formed in the magnetic core protection shell, the limiting clamping grooves correspond to the limiting matching pieces one to one, and the inserting plate body penetrates through the magnetic core protection shell; the limiting matching piece comprises a first limiting part, the first limiting part is connected with the plugboard body, first matching surfaces are arranged on the two sides of the first limiting part in the second direction, the first matching surfaces are obliquely arranged relative to the plugboard body, the limiting clamping groove comprises a first matching part, and the first matching part comprises two second matching surfaces which are oppositely arranged in the second direction; and the first matching surfaces are matched with the corresponding second matching surfaces. According to the common mode inductor provided by the utility model, the assembling stability of the magnetic core assembly can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of common-mode inductors, in particular to a common-mode inductor. Background Art

[0002] Common-mode inductors typically consist of windings, a magnetic core, a core shield, an insert, and a base. The traditional common-mode inductor assembly process is as follows: first, the shield is assembled, then the wires are wound. Next, the core assembly is placed on the insert and centered on the base. Finally, the product is secured to the base and separator using glue.

[0003] However, the existing plug-in board and the protective shell have a weak fit, and the protective shell is prone to shaking during use, resulting in poor stability of the magnetic core component during use, affecting the performance of the common-mode inductor. Utility Model Content

[0004] The utility model provides a common-mode inductor to solve the defects of the existing plug-in board and the protective shell, which are weak in tightness and easy to shake during use. This leads to poor stability of the magnetic core assembly (including the magnetic core and the coil wound on the magnetic core) during use, thus affecting the performance of the common-mode inductor.

[0005] The utility model provides a common mode inductor, comprising: a base, an inserting plate and a magnetic core assembly, wherein the magnetic core assembly comprises a magnetic core, a magnetic core shell and a winding, the magnetic core is arranged in the magnetic core shell, and the winding is wound on the magnetic core shell.

[0006] The plugboard includes a plugboard body and two limiting fittings, the two limiting fittings are respectively arranged on both sides of the plugboard body along the first direction, one of the limiting fittings is connected to the base, and two limiting slots are provided on the magnetic core protective shell, the limiting slots correspond one-to-one to the limiting fittings, and the plugboard body is passed through the magnetic core protective shell.

[0007] The limiting fitting includes a first limiting portion, which is connected to the plug board body. The first limiting portion is provided with a first matching surface on both sides along the second direction. The first matching surface is inclined relative to the plug board body. The limiting slot includes a first matching portion, which includes two second matching surfaces arranged opposite to each other along the second direction. The first matching surface matches the corresponding second matching surface.

[0008] According to the common-mode inductor provided by the present invention, the limiting fitting also includes a second limiting portion, one end of the second limiting portion is connected to the first limiting portion, one end of the second limiting portion is connected to the plug-in board body, and the limiting slot also includes a second matching portion, one end of the second matching portion is connected to the first matching portion.

[0009] The second limiting portion is provided with a third mating surface on both sides along the second direction, and the third mating surface is inclined relative to the plug board body. The second mating portion includes two fourth mating surfaces arranged opposite to each other along the second direction, and the third mating surface is mated with the corresponding fourth mating surface.

[0010] According to the common-mode inductor provided by the present invention, the two first mating surfaces are symmetrically arranged on both sides of the first limiting portion along the second direction, and the two second mating surfaces are symmetrically arranged on both sides of the first limiting portion along the second direction.

[0011] The two third matching surfaces are symmetrically arranged on both sides of the second matching portion along the second direction, and the two fourth matching surfaces are symmetrically arranged on both sides of the second matching portion along the second direction.

[0012] According to the common-mode inductor provided by the present invention, the angle between the first mating surface and the adjacent third mating surface is greater than 90° and less than 180°, and the angle between the second mating surface and the adjacent fourth mating surface is greater than 90° and less than 180°.

[0013] According to the common-mode inductor provided by the present invention, the plugboard body and the first limiting portion are integrally provided.

[0014] According to the common-mode inductor provided by the present invention, the plugboard body, the first limiting portion and the base are integrally provided.

[0015] According to the common-mode inductor provided by the present invention, the bottom surfaces of the two first limiting portions are both matched with the outer peripheral wall of the magnetic core protective shell.

[0016] According to the common-mode inductor provided by the present invention, the two position-limiting fittings are symmetrically arranged on both sides of the plug-in board body along the first direction.

[0017] According to the common-mode inductor provided by the present invention, the base is provided with a plurality of wiring structures spaced apart along the circumferential direction, and the wiring structures are used to lead out the pins of the winding.

[0018] According to the common-mode inductor provided by the present invention, the wiring structure is a wiring groove or a wiring hole.

[0019] The common-mode inductor provided by the present utility model has limit fittings provided at both ends of the plug-in board body. After assembly, the two first fitting surfaces of the first limit portion in the limit fitting are respectively in contact with the corresponding second fitting surfaces of the first limit portion in the limit slot, and the first fitting surfaces and the second fitting surfaces are both inclined relative to the plug-in board body, which can significantly improve the stability of the magnetic core shield when mated with the plug-in board, and prevent the magnetic core assembly from shaking during use.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is one of the schematic diagrams of the common-mode inductor provided in an embodiment of the present utility model.

[0023] Figure 2 This is the second schematic diagram of the common-mode inductor provided by the embodiment of the present utility model.

[0024] Figure 3 This is the third schematic diagram of the common-mode inductor provided in an embodiment of the present utility model.

[0025] Figure 4 It is a schematic diagram of a base and an inserting plate integrally provided in a common-mode inductor provided in an embodiment of the present utility model.

[0026] Figure 5 A schematic diagram of a magnetic core shield in a common-mode inductor provided by an embodiment of the present invention.

[0027] Reference numerals:

[0028] 10. Base; 110. Wiring structure; 20. Insert board; 210. Insert board body; 220. Position-limiting fitting; 221. First position-limiting portion; 2211. First mating surface; 222. Second position-limiting portion; 2221. Third mating surface; 30. Magnetic core assembly; 310. Magnetic core shell; 311. Position-limiting slot; 3111. First mating portion; 31111. Second mating surface; 3112. Second mating portion; 31121. Fourth mating surface; 320. Winding. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0032] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0034] The following combination Figures 1 to 5 The common-mode inductor provided by the utility model is described.

[0035] It should be noted that the following "first direction" and "second direction" refer to Figure 4 The direction of the arrow shown in , that is, the above-mentioned “first direction” is the height direction of the plugboard 20 , and the above-mentioned “first direction” is the thickness direction of the plugboard 20 .

[0036] See also Figures 1 to 5 As shown, the common-mode inductor provided by the embodiment of the present invention includes: a base 10, an insert board 20 and a magnetic core assembly 30, the magnetic core assembly 30 includes a magnetic core, a magnetic core shell 310 and a winding 320, the magnetic core is arranged in the magnetic core shell 310, and the winding 320 is wound on the magnetic core shell 310.

[0037] The plugboard 20 includes a plugboard body 210 and two limiting fittings 220. The two limiting fittings 220 are respectively arranged on both sides of the plugboard body 210 along the first direction. One of the limiting fittings 220 is connected to the base 10. Two limiting slots 311 are provided on the magnetic core shield 310. The limiting slots 311 correspond one-to-one to the limiting fittings 220. The plugboard body 210 is passed through the magnetic core shield 310.

[0038] The limiting fitting 220 includes a first limiting portion 221, which is connected to the plug board body 210. The first limiting portion 221 is provided with a first matching surface 2211 on both sides along the second direction. The first matching surface 2211 is inclined relative to the plug board body 210. The limiting slot 311 includes a first matching portion 3111. The first matching portion 3111 includes two second matching surfaces 31111 arranged opposite to each other along the second direction. The first matching surface 2211 is matched with the corresponding second matching surface 31111.

[0039] The common-mode inductor provided by the present invention provides limiting fittings 220 at both ends of the plugboard body 210. After assembly, the two first matching surfaces 2211 of the first limiting portion 221 in the limiting fitting 220 are in contact with and matched with the corresponding second matching surfaces 31111 of the first limiting portion 221 in the limiting slot 311, and the first matching surfaces 2211 and the second matching surfaces 31111 are both inclined relative to the plugboard body 210, which can significantly improve the stability of the magnetic core shield 310 when mated with the plugboard 20, and prevent the magnetic core assembly 30 from shaking during use.

[0040] Specifically, during installation, one only needs to align the first limiting portion 221 of the limiting fitting 220 with the first mating portion 3111 corresponding to the limiting slot 311, and push the first limiting portion 221 inward, so that the upper and lower first mating surfaces 2211 simultaneously contact and mate with the corresponding second mating surfaces 31111. Because the first mating surfaces 2211 and the second mating surfaces 31111 are both inclined relative to the plugboard body 210, the mating structure of the upper and lower sets of first mating surfaces 2211 and second mating surfaces 31111 can securely secure the magnetic core shield 310 to the plugboard 20, ensuring its positional stability and preventing shaking.

[0041] See also Figure 1 、 Figure 3 and Figure 4 As shown, according to some embodiments of the present invention, the limiting fitting 220 also includes a second limiting portion 222, one end of the second limiting portion 222 is connected to the first limiting portion 221, and one end of the second limiting portion 222 is connected to the plug board body 210, and the limiting slot 311 also includes a second matching portion 3112, and one end of the second matching portion 3112 is connected to the first matching portion 3111; the second limiting portion 222 is provided with a third matching surface 2221 on both sides along the second direction, and the third matching surface 2221 is inclined relative to the plug board body 210, and the second matching portion 3112 includes two fourth matching surfaces 31121 arranged opposite to each other along the second direction, and the third matching surface 2221 is matched with the corresponding fourth matching surface 31121.

[0042] By setting the second limiting portion 222 and the second matching portion 3112, after the assembly is completed, the magnetic core shield 310 can be further limited and fixed through the matching structure of the upper and lower groups of third matching surfaces 2221 and the fourth matching surface 31121, thereby further improving its stability.

[0043] In addition, adding this structure will not increase the difficulty of assembling the common-mode inductor. During installation, it is only necessary to align the first limiting portion 221 of the limiting fitting 220 with the first matching portion 3111 corresponding to the limiting slot 311, and align the second limiting portion 222 of the limiting fitting 220 with the second matching portion 3112 corresponding to the limiting slot 311, and push the first limiting portion 221 and the second limiting portion 222 in, so that the first matching surfaces 2211 located above and below are in contact with the corresponding second matching surfaces 31111 at the same time, and the third matching surfaces 2221 located above and below are in contact with the corresponding fourth matching surfaces 31121 at the same time.

[0044] See also Figure 1 、 Figure 3 and Figure 4As shown, according to some embodiments of the present invention, the two first mating surfaces 2211 are symmetrically arranged on both sides of the first limiting portion 221 along the second direction, and the two second mating surfaces 31111 are symmetrically arranged on both sides of the first limiting portion 221 along the second direction; the two third mating surfaces 2221 are symmetrically arranged on both sides of the second limiting portion 222 along the second direction, and the two fourth mating surfaces 31121 are symmetrically arranged on both sides of the second mating portion 3112 along the second direction.

[0045] By arranging the first mating surface 2211, the second mating surface 31111, the third mating surface 2221, and the fourth mating surface 31121 symmetrically, the first and second limiting portions 221, 222 of the limiting fitting 220 can be pushed into the limiting slot 311 in any direction during assembly without having to rotate the magnetic core shield 310, thereby simplifying assembly. Furthermore, the stability of the magnetic core shield 310 after assembly can be further improved.

[0046] See also Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, the angle between the first mating surface 2211 and the adjacent third mating surface 2221 (α in the figure) is greater than 90° and less than 180°, and the angle between the second mating surface 31111 and the adjacent fourth mating surface 31121 is greater than 90° and less than 180° (β in the figure).

[0047] By setting the angles between the first mating surface 2211 and the adjacent third mating surface 2221, and between the second mating surface 31111 and the adjacent fourth mating surface 31121 to be greater than 90° and less than 180°, after assembly is completed, the two fourth mating surfaces 31121 located above and the two first mating surfaces 2211 located below can support the magnetic core shield 310, thereby further improving the stability of the magnetic core shield 310 when assembly is completed.

[0048] As an example, the angle between the first mating surface 2211 and the adjacent third mating surface 2221 can be 120°, 150°, etc., and the angle between the second mating surface 31111 and the adjacent fourth mating surface 31121 can be 120°, 150°, etc.

[0049] It can be understood that the angle between the first mating surface 2211 and the adjacent third mating surface 2221 is the same as the angle between the second mating surface 31111 and the adjacent fourth mating surface 31121, so as to facilitate the mating of the first mating surface 2211 with the second mating surface 31111 and the third mating surface 2221 with the fourth mating surface 31121 during assembly.

[0050] See also Figure 4As shown, according to some embodiments of the present invention, the plugboard body 210 and the first limiting portion 221 are integrally provided.

[0051] By integrating the plugboard body 210 and the first limiting portion 221 , the compactness and stability of the plugboard 20 can be improved, and the manufacturing and assembly processes can be simplified.

[0052] It should be noted that the above-mentioned integrated arrangement of the plugboard body 210 and the first limiting portion 221 specifically refers to the integrated arrangement of the plugboard body 210 and the upper and lower first limiting portions 221 .

[0053] See also Figure 4 As shown, according to some embodiments of the present invention, the plugboard body 210 , the first limiting portion 221 , the second limiting portion 222 and the base 10 are integrally provided.

[0054] By integrating the plugboard body 210, the first stopper 221, and the base 10, the compactness and stability of the plugboard 20 and base 10 are improved, simplifying the manufacturing and assembly process. Furthermore, integrating the first stopper 221 with the base 10 eliminates the need for centering the plugboard 20 (specifically, aligning the lower first stopper 221 with the center of the base 10) and injecting glue during assembly, significantly simplifying the assembly process and improving efficiency.

[0055] See also Figure 2 As shown, according to some embodiments of the present invention, the bottom surfaces of the two first limiting portions 221 are both matched with the outer peripheral wall of the magnetic core shield 310 .

[0056] By matching the bottom surfaces of the two first limiting parts 221 with the outer peripheral wall of the magnetic core shield 310, the bottom surfaces of the upper and lower first limiting parts 221 can limit the magnetic core shield 310 when the assembly is completed. Combined with the limiting effect of the aforementioned first mating surface 2211 and the second mating surface 31111, and the third mating surface 2221 and the fourth mating surface 31121 on the magnetic core shield 310, the magnetic core shield 310 can be limited in multiple dimensions, fully ensuring its stability after the assembly is completed, and the structure is easy to assemble and disassemble and easy to process and manufacture.

[0057] See also Figure 4 As shown, according to some embodiments of the present invention, two position-limiting fittings 220 are symmetrically arranged on both sides of the plugboard body 210 along the first direction.

[0058] By arranging the two limiting fittings 220 symmetrically on both sides of the plug board body 210 along the first direction, during assembly, the upper and lower limiting slots 311 of the magnetic core shield 310 can respectively be limitedly fitted with any one of the limiting fittings 220, without adjusting the direction of the magnetic core shield 310, thereby further simplifying the complexity of assembly.

[0059] See also Figure 4 As shown, according to some embodiments of the present invention, the base 10 is provided with a plurality of wiring structures 110 spaced apart along the circumferential direction, and the wiring structures 110 are used to lead out the pins of the winding 320 .

[0060] By arranging a plurality of wiring structures 110 at intervals along the circumferential direction on the base 10 , different pin-out position requirements can be met when the pins are led out, thereby avoiding cost increases due to changes in hole position requirements.

[0061] Specifically, the wiring structure 110 can be a wiring trough, a wiring hole, etc. When the wiring structure 110 is a wiring trough, it is convenient to push the wire directly into the trough from the slot, which is easy to operate. When the wiring structure 110 is a wiring hole, the wire needs to be passed through the wiring hole, which is more stable.

[0062] It can be seen from the description of the above embodiments that the common-mode inductor provided by the present invention has at least the following advantages.

[0063] The common-mode inductor provided by the present invention provides limiting fittings 220 at both ends of the plugboard body 210. After assembly, the two first matching surfaces 2211 of the first limiting portion 221 in the limiting fitting 220 are in contact with and matched with the corresponding second matching surfaces 31111 of the first limiting portion 221 in the limiting slot 311, and the first matching surfaces 2211 and the second matching surfaces 31111 are both inclined relative to the plugboard body 210, which can significantly improve the stability of the magnetic core shield 310 when mated with the plugboard 20, and prevent the magnetic core assembly 30 from shaking during use.

[0064] The common-mode inductor provided by this utility model improves the compactness and stability of the plugboard 20 and base 10 by integrating the plugboard body 210, the first stopper 221, and the base 10, and simplifies the manufacturing and assembly process. Furthermore, the integration of the first stopper 221 with the base 10 eliminates the need for centering the plugboard 20 (specifically, aligning the lower first stopper 221 with the center of the base 10) and glue injection during assembly, greatly simplifying the assembly process and improving assembly efficiency.

[0065] The common-mode inductor provided by the present invention can meet different pin-out requirements by arranging multiple routing structures 110 at intervals along the circumferential direction on the base 10, thereby avoiding cost increases due to changes in hole position requirements when leading out pins.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A common mode inductor, characterized in that: include: A base, an insert plate and a magnetic core assembly, wherein the magnetic core assembly includes a magnetic core, a magnetic core shell and a winding, wherein the magnetic core is arranged in the magnetic core shell and the winding is wound on the magnetic core shell; The plugboard includes a plugboard body and two limiting fittings, the two limiting fittings are respectively provided on both sides of the plugboard body along the first direction, one of the limiting fittings is connected to the base, the magnetic core shield is provided with two limiting slots, the limiting slots correspond to the limiting fittings one-to-one, and the plugboard body is passed through the magnetic core shield; The limiting fitting includes a first limiting portion, which is connected to the plug board body. The first limiting portion is provided with a first matching surface on both sides along the second direction. The first matching surface is inclined relative to the plug board body. The limiting slot includes a first matching portion, which includes two second matching surfaces arranged opposite to each other along the second direction. The first matching surface matches the corresponding second matching surface.

2. The common mode inductor according to claim 1, wherein: The limiting fitting further includes a second limiting portion, one end of which is connected to the first limiting portion, and one end of which is connected to the plugboard body. The limiting slot further includes a second matching portion, one end of which is connected to the first matching portion. The second limiting portion is provided with a third mating surface on both sides along the second direction, and the third mating surface is inclined relative to the plug board body. The second mating portion includes two fourth mating surfaces arranged opposite to each other along the second direction, and the third mating surface is mated with the corresponding fourth mating surface.

3. The common mode inductor according to claim 2, wherein: The two first mating surfaces are symmetrically arranged on both sides of the first limiting portion along the second direction, and the two second mating surfaces are symmetrically arranged on both sides of the first limiting portion along the second direction; The two third matching surfaces are symmetrically arranged on both sides of the second matching portion along the second direction, and the two fourth matching surfaces are symmetrically arranged on both sides of the second matching portion along the second direction.

4. The common mode inductor according to claim 2, wherein: The included angle between the first mating surface and the adjacent third mating surface is greater than 90° and less than 180°, and the included angle between the second mating surface and the adjacent fourth mating surface is greater than 90° and less than 180°.

5. The common mode inductor according to claim 2, wherein: The plugboard body and the first limiting portion are integrally arranged.

6. The common mode inductor according to claim 5, characterized in that The plugboard body, the first limiting portion and the base are integrally arranged.

7. The common mode inductor according to any one of claims 1 to 6, characterized in that: The bottom surfaces of the two first limiting portions are both matched with the outer peripheral wall of the magnetic core protective shell.

8. The common mode inductor according to any one of claims 1 to 6, characterized in that: The two position-limiting fittings are symmetrically arranged on two sides of the plugboard body along the first direction.

9. The common mode inductor according to any one of claims 1 to 6, characterized in that: The base is provided with a plurality of wiring structures at intervals along the circumferential direction, and the wiring structures are used to lead out the pins of the winding.

10. The common mode inductor according to claim 9, wherein: The wiring structure is a wiring groove or a wiring hole.

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