Inductor

Abstract

The utility model provides an inductor which is used for solving the technical problems that in the injection molding process of a coil and a magnetic core of an existing inductor, an insulator is prone to leaking to the periphery of the coil, so that the cleaning difficulty is high, and the forming efficiency is low, and particularly relates to a coil holder of the inductor. The inductor comprises a coil, a magnetic core and a coil seat, the coil seat comprises a seat ring and a positioning arm inserted into the coil, the positioning arm is fixed on the seat ring, the seat ring is provided with a spiral binding face, and the spiral binding face is located on the side, facing the coil, of the seat ring and is attached to the end face of the coil. The positioning arm is provided with a coil positioning face matched with the inner circumferential face of the coil in a positioning mode, the positioning arm is further provided with a magnetic core positioning face matched with the magnetic core in a positioning mode, and the magnetic core positioning face and the coil positioning face are arranged in a back-to-back mode. Due to the fact that the spiral attaching face of the seat ring is attached to the end face of the coil, when the coil and the magnetic core are fixed in an injection molding mode, an injection-molded insulator is not prone to overflowing from the end face of the coil, follow-up cleaning work is relieved, and the forming efficiency of the inductor is improved. The positioning arms can facilitate the positioning of the coil holder and the coil, the positioning of the coil holder and the magnetic core, and the assembly of the coil holder, the coil and the magnetic core.

Description

Technical Field

[0001] The present application relates to the technical field of inductors, and in particular to a coil base of an inductor. Background Art

[0002] Inductors typically consist of a coil and a magnetic core. Currently, injection molding is commonly used to secure the coil and core together. Prior to molding, the coil and core must be assembled together. To improve the inductor's heat dissipation efficiency, the outer surface of the coil is typically exposed. However, during the current injection molding process, the insulation often flows through gaps at the coil ends and onto the outer surface of the coil, making subsequent cleaning difficult and reducing molding efficiency. Utility Model Content

[0003] The present application provides an inductor for improving the technical problems of high cleaning difficulty and low molding efficiency caused by the easy leakage of insulation to the periphery of the coil during the injection molding process of the coil and magnetic core of the current inductor.

[0004] According to the first aspect, an embodiment provides an inductor, which includes a coil, a magnetic core and a coil seat, the coil seat including a seat ring and a positioning arm inserted into the coil, the positioning arm is fixed on the seat ring, the seat ring has a spiral fitting surface, the spiral fitting surface is on the side of the seat ring facing the coil and fits with the end face of the coil; the positioning arm has a coil positioning surface that is positioned and matched with the inner circumferential surface of the coil, the positioning arm also has a magnetic core positioning surface that is positioned and matched with the magnetic core, and the magnetic core positioning surface and the coil positioning surface are arranged opposite to each other.

[0005] Furthermore, in one embodiment, the positioning arm has a positioning rib, and the positioning rib is interference fit with the inner wall surface of the coil.

[0006] Furthermore, in one embodiment, the number of the positioning ribs is at least two, and at least two positioning ribs are positioned and matched with the same coil.

[0007] Furthermore, in one embodiment, the coil is a rectangular coil, at least one of the positioning ribs is a first positioning rib, and at least one of the positioning ribs is a second positioning rib, and the first positioning rib and the second positioning rib respectively position two opposite inner wall surfaces in the coil.

[0008] Furthermore, in one embodiment, the positioning arm includes a first slat and a second slat, the first slat and the second slat are arranged at an angle, the first slat has a first guide surface at one end away from the seat ring, the first guide surface gradually approaches the second slat in the length direction of the positioning arm and away from the seat ring, and / or the second slat has a second guide surface at one end away from the seat ring, the second guide surface gradually approaches the first slat in the length direction of the positioning arm and away from the seat ring.

[0009] Furthermore, in one embodiment, the positioning arm has a positioning rib, the positioning rib is interference fit with the inner wall surface of the coil, the positioning rib is located on the first slat, and the extension direction of the positioning rib is consistent with the extension direction of the first slat.

[0010] Furthermore, in one embodiment, the seat ring has at least two guide grooves, the seat ring has an inner hole of the seat ring, the magnetic core passes through the inner hole of the seat ring, and the guide groove is located on the hole wall of the inner hole of the seat ring, for allowing the injection fluid to enter the gap between the coil and the magnetic core.

[0011] Furthermore, in one embodiment, the depth of at least one guide groove gradually increases from the end of the positioning arm away from the seat ring to the end close to the seat ring.

[0012] Furthermore, in one embodiment, the seat ring is rectangular, and the seat ring includes four seat ring beams connected end to end, and at least two of the guide grooves are located on the same seat ring beam.

[0013] Furthermore, in one embodiment, the number of the coils is at least two, at least one coil is a first coil, at least one coil is a second coil, the first coil and the second coil share the coil seat; the first coil and the second coil have the same structure.

[0014] According to the inductor of the above embodiment, the coil base of the inductor includes a base ring and a positioning arm. The spiral bonding surface of the base ring mates with the end face of the coil. During injection molding of the coil and the magnetic core, the injected insulation is less likely to overflow from the end face of the coil, thereby reducing subsequent cleaning work and improving the molding efficiency of the inductor. The positioning arm facilitates the positioning of the coil base and the coil, as well as the positioning of the coil base and the magnetic core, and facilitates the assembly of the coil base, coil, and magnetic core. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a coil and a coil base in an embodiment;

[0016] Figure 2 This is a schematic structural diagram of a coil base in one embodiment;

[0017] Figure 3 1 is a cross-sectional view of a coil and a coil base in one embodiment.

[0018] List of feature names corresponding to the figure marks in the figure: 1. Coil; 11. First coil; 12. Second coil; 2. Coil seat; 21. Seat ring; 211. Spiral fitting surface; 212. Guide groove; 2121. Groove bottom surface; 213. Seat ring inner hole; 214. Seat ring beam; 22. Positioning arm; 221. Coil positioning surface; 222. Core positioning surface; 223. Positioning rib; 2231. First positioning rib; 2232. Second positioning rib; 224. First slat; 2241. First guide surface; 225. Second slat; 2251. Second guide surface; 23. Protrusion.

[0019] Explanation of the reference numerals in brackets in the accompanying drawings: In the reference numerals in brackets in the accompanying drawings, the features referred to by the reference numerals are both the features represented by the numbers in the brackets and the features represented by the numbers outside the brackets. DETAILED DESCRIPTION

[0020] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0021] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0022] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0023] In one embodiment, please refer to Figures 1 to 3 The inductor includes a coil 1, a magnetic core (not shown), and a coil base 2. The coil base 2 includes a base ring 21 and a positioning arm 22 inserted into the coil 1. The positioning arm 22 is fixed to the base ring 21. The base ring 21 has a spiral bonding surface 211. The spiral bonding surface 211 is located on the side of the base ring 21 facing the coil 1 and is bonded to the end face of the coil 1. The positioning arm 22 has a coil positioning surface 221 that is positioned and matched with the inner circumference of the coil 1. The positioning arm 22 also has a magnetic core positioning surface 222 that is positioned and matched with the magnetic core. The magnetic core positioning surface 222 is arranged opposite to the coil positioning surface 221.

[0024] The spirally bonded surface 211 of the seat ring 21 mates with the end face of the coil 1. During injection molding of the coil 1 and the magnetic core, the molded insulator is less likely to overflow from the end face of the coil 1, thereby reducing subsequent cleaning work and improving the molding efficiency of the inductor. The positioning arm 22 facilitates the positioning of the coil seat 2 and the coil 1, as well as the positioning of the coil seat 2 and the magnetic core, facilitating the assembly of the coil seat 2, the coil 1, and the magnetic core.

[0025] Specifically, in one embodiment, please refer to Figure 1 and Figure 3 The coil 1 is spirally wound using a flat cross-section wire. The end face of the coil 1 is spirally shaped, and the spiral bonding surface 211 is bonded to the end face of the coil 1. In one embodiment, the coil 1 is a rectangular coil, and the seat ring 21 is also a rectangular seat ring. In some other embodiments, the coil 1 can also be circular, elliptical, or any other feasible shape.

[0026] The positioning arm 22 in the present application is located between the coil 1 and the magnetic core, and can position the coil 1 and the magnetic core, thereby facilitating the installation of the coil 1, the magnetic core and the coil base 2.

[0027] In one embodiment, please refer to Figure 1 and Figure 3 The number of coils 1 is at least two, at least one coil 1 is a first coil 11, and at least one coil 1 is a second coil 12. The first coil 11 and the second coil 12 share a coil base 2; the first coil 11 and the second coil 12 have the same structure. Specifically, in one embodiment, the number of coils 1 is two, and the coil base 2 includes two seat rings 21, and the two seat rings 21 are integrally formed. In one embodiment, the magnetic core is a segmented magnetic core, and the magnetic core includes a magnetic core column in the coil 1 and a U-shaped magnetic core segment connected to the magnetic core column. The number of U-shaped magnetic core segments is two, and they are respectively connected to the two ends of the magnetic core column. The number of magnetic core columns is two, and the two magnetic core columns are respectively installed in the first coil 11 and the second coil 12. The U-shaped magnetic core segment is connected to the ends of the two magnetic core columns. Specifically, in one embodiment, the magnetic core column and the U-shaped magnetic core segment are pre-fixed together by bonding or interference fit, and then the assembled magnetic core, coil 1 and coil base 2 are fixed by injection molding.

[0028] In order to improve the reliability of the coil 1 and the coil base 2, in one embodiment, please refer to Figure 1 and Figure 2 The positioning arm 22 has a positioning rib 223 that forms an interference fit with the inner wall of the coil 1. The interference fit between the positioning rib 223 and the coil 1 securely secures the coil 1 to the coil holder 2. In other embodiments, the coil holder 2 and the coil 1 may be assembled together using any other feasible method, such as fasteners or adhesive bonding.

[0029] Further, in one embodiment, please refer to Figure 1 and Figure 2 The number of positioning ribs 223 is at least two, and at least two positioning ribs 223 are positioned and matched with the same coil 1. By having more than two positioning ribs 223, the reliability of the coil base 2 and the coil 1 can be further improved, and the coil 1 and the coil base 2 can be clamped more tightly and less likely to shake.

[0030] Further, in one embodiment, please refer to Figure 1 and Figure 2 The coil 1 is a rectangular coil 1, at least one positioning rib 223 is a first positioning rib 2231, and at least one positioning rib 223 is a second positioning rib 2232. The first positioning rib 2231 and the second positioning rib 2232 respectively position the two opposite inner wall surfaces in the coil 1, that is, the first positioning rib 2231 positions the first inner wall surface in the coil 1, and the second positioning rib 2232 positions the second inner wall surface in the coil 1, and the first inner wall surface and the second inner wall surface are arranged opposite to each other. This can make the coil 1 and the coil base 2 more firmly fixed. In some other embodiments, as needed, the positioning rib 223 can also only be in positioning contact with one inner wall surface of the coil 1.

[0031] Further, in one embodiment, please refer to Figure 2 The positioning arm 22 includes a first strip 224 and a second strip 225. The first strip 224 and the second strip 225 are arranged in an angle. The end of the first strip 224 away from the seat ring 21 has a first guide surface 2241. The first guide surface 2241 gradually approaches the second strip 225 in the length direction of the positioning arm 22 and in the direction away from the seat ring 21. In one embodiment, please refer to Figure 2 and Figure 3 The second strip 225 has a second guide surface 2251 at one end away from the seat ring 21. The second guide surface 2251 gradually approaches the first strip 224 along the length direction of the positioning arm 22 and in the direction away from the seat ring 21. In this way, the first guide surface 2241 and the second guide surface 2251 can play a guiding role during the insertion of the coil 1 and the positioning arm 22, facilitating the insertion of the positioning arm 22 and the coil 1.

[0032] Further, in one embodiment, please refer to Figure 2 The positioning arm 22 has a positioning rib 223, which is interference fit with the inner wall surface of the coil 1. The positioning rib 223 is located on the first strip 224, and the extension direction of the first positioning rib 2231 is consistent with the extension direction of the first strip 224.

[0033] Furthermore, in order to allow the molded insulator to fully enter the gap between the coil 1 and the core during the injection molding process, in one embodiment, please refer to Figure 1 and Figure 2 The seat ring 21 has at least two guide grooves 212. The seat ring 21 has an inner hole 213, through which the magnetic core passes. The guide grooves 212 are located on the wall of the inner hole 213 and are used to guide the injection fluid into the gap between the coil 1 and the magnetic core. The guide grooves 212 can guide the insulator during injection molding. In some other embodiments, when the distance between the magnetic core and the coil 1 is sufficient, the guide grooves 212 can be omitted.

[0034] Further, in one embodiment, please refer to Figure 1 and Figure 2 The depth of at least one guide groove 212 gradually increases from the end of the positioning arm 22 away from the seat ring 21 to the end close to the seat ring 21, that is, the bottom surface 2121 of at least one guide groove 212 is a slope. This can further improve the diversion effect of the guide groove 212.

[0035] Furthermore, in one embodiment, the seat ring 21 is rectangular, and includes four seat ring beams 214 connected end to end, and at least two guide grooves 212 are located on the same seat ring beam 214 .

[0036] In one embodiment, the coil holder 2 includes two integrally formed rings 21. Each ring 21 has four positioning arms 22, one corresponding to each corner of the coil 1. Since coil holders 2 are provided at both ends of the coil 1, there are two coil holders 2, one mounted at each end of the coil 1.

[0037] In one embodiment, in order to better position the coil 1, please refer to Figure 2 The coil base 2 has a protrusion 23 that separates the two coils 1. The protrusion 23 can separate the two coils 1 and also position the ends of the coil 1.

[0038] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For those skilled in the art of the present application, based on the concept of the present application, they can also make some simple deductions, modifications or substitutions.

Claims

1. An inductor, characterized in that: It includes a coil, a magnetic core and a coil seat, the coil seat includes a seat ring and a positioning arm inserted into the coil, the positioning arm is fixed on the seat ring, the seat ring has a spiral fitting surface, the spiral fitting surface is on the side of the seat ring facing the coil and fits with the end face of the coil; the positioning arm has a coil positioning surface that is positioned and matched with the inner circumference of the coil, the positioning arm also has a magnetic core positioning surface that is positioned and matched with the magnetic core, and the magnetic core positioning surface and the coil positioning surface are arranged opposite to each other.

2. The inductor according to claim 1, wherein The positioning arm has a positioning rib, and the positioning rib is interference-fitted with the inner wall surface of the coil.

3. The inductor according to claim 2, wherein: The number of the positioning ribs is at least two, and at least two positioning ribs are positioned and matched with the same coil.

4. The inductor according to claim 3, wherein The coil is a rectangular coil, at least one of the positioning ribs is a first positioning rib, and at least one of the positioning ribs is a second positioning rib. The first positioning rib and the second positioning rib respectively position two opposite inner wall surfaces in the coil.

5. The inductor according to claim 1, wherein The positioning arm includes a first slat and a second slat, and the first slat and the second slat are arranged at an angle; the first slat has a first guide surface at one end away from the seat ring, and the first guide surface gradually approaches the second slat in the length direction of the positioning arm and away from the seat ring, and / or the second slat has a second guide surface at one end away from the seat ring, and the second guide surface gradually approaches the first slat in the length direction of the positioning arm and away from the seat ring.

6. The inductor according to claim 5, wherein The positioning arm has a positioning rib, which is interference-fitted with the inner wall surface of the coil. The positioning rib is located on the first strip, and an extending direction of the positioning rib is consistent with an extending direction of the first strip.

7. The inductor according to any one of claims 1 to 6, wherein: The seat ring has at least two guide grooves, the seat ring has an inner hole, the magnetic core passes through the inner hole, and the guide groove is located on the hole wall of the inner hole of the seat ring, which is used to allow the injection fluid to enter the gap between the coil and the magnetic core.

8. The inductor according to claim 7, wherein The depth of at least one of the guide grooves gradually increases in a direction from the end of the positioning arm away from the seat ring to the end close to the seat ring.

9. The inductor according to claim 7, wherein The seat ring is rectangular and includes four seat ring beams connected end to end, and at least two guide grooves are located on the same seat ring beam.

10. The inductor according to any one of claims 1 to 6, wherein: The number of the coils is at least two, at least one of the coils is a first coil, and at least one of the coils is a second coil. The first coil and the second coil share the coil seat; and the first coil and the second coil have the same structure.

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