Vertical common mode choke

Abstract

The utility model discloses a vertical common mode inductor which comprises a magnetic ring, a coil and a substrate. The coil is wound on the magnetic ring and is fixed with the substrate; the substrate is provided with a plurality of pins, and the coil is conductively connected with the pins; a positioning hole is further formed in the substrate; when the coil and the substrate are fixedly installed, the bottom of the magnetic ring can be fixed in the positioning hole. The technical scheme of the utility model aims to solve the technical problem that the product is easy to skew in the installation process, so that the appearance of the product is regular, and the size consistency is obviously improved; meanwhile, the bottom of the magnetic ring and the substrate are matched in an embedded mode, so that the overall height is reduced, occupied space is reduced, and safety risks caused by device protrusion are avoided; meanwhile, the open area formed by the positioning hole and the bottom of the magnetic ring enhances the heat dissipation efficiency of the coil and the magnetic ring, and by combining the heat conduction characteristic of the substrate, the aging of the element can be delayed, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of inductor element technology, and in particular to a vertical common-mode inductor. Background Technology

[0002] Vertical common-mode inductors are high-frequency electronic components that typically employ a toroidal magnetic core structure. Their core consists of a magnetic ring and a wound coil. Due to their closed magnetic circuit characteristics, toroidal inductors offer advantages such as low leakage flux, high power density, and good anti-interference capabilities, making them widely used in switching power supplies, filter circuits, and high-frequency transformers. Traditional vertical common-mode inductors often use a circular magnetic ring structure. However, after the coil is directly wound onto the circular magnetic ring, the ring needs to be glued to a substrate. Since the contact between the magnetic ring and the substrate is a line-to-surface connection, the gluing process can easily cause uncontrollable skewing of the magnetic ring during fixation. This results in poor appearance consistency in mass-produced vertical common-mode inductors, with tilted magnetic rings and poor aesthetics. Furthermore, the direct fixation of the circular magnetic ring to the substrate leads to a relatively high height for the vertical common-mode inductor, hindering miniaturization design. Utility Model Content

[0003] The purpose of this invention is to provide a vertical common mode inductor, which aims to solve the technical problem of the product being prone to tilting during installation.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A vertical common-mode inductor includes a magnetic ring, a coil, and a substrate;

[0006] The coil is wound around the magnetic ring and fixed to the substrate;

[0007] The substrate is provided with multiple pins, and the coil is electrically connected to the pins;

[0008] The substrate also has positioning holes; when the coil is fixedly installed to the substrate, the bottom of the magnetic ring can be fixed in the positioning holes.

[0009] In one embodiment, the magnetic ring is a ring-shaped structure with a rectangular cross-section, and the positioning hole is a rectangular hole so that the outer surface of the magnetic ring is adapted to the positioning hole.

[0010] In one embodiment, the width of the positioning hole is greater than the thickness of the magnetic ring, and the length of the positioning hole is less than the width of the positioning hole.

[0011] In one embodiment, the positioning hole is chamfered.

[0012] In one embodiment, the bottom of the magnetic ring is provided with a flange corresponding to the position of the positioning hole, and the flange can be received in the positioning hole.

[0013] In one embodiment, thermally conductive silicone grease is disposed between the flange and the positioning hole.

[0014] In one embodiment, the sidewall of the positioning hole is formed with an asymmetric identification groove, and the flange has a mating portion that mates with the asymmetric identification groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This utility model of a vertical common-mode inductor eliminates the installation misalignment problem caused by the symmetry of traditional circular magnetic rings by embedding the bottom of the magnetic ring into the positioning hole of the substrate and using the hole wall to circumferentially limit and fix the magnetic ring. This results in a more upright product appearance and significantly improved dimensional consistency. Secondly, the one-step embedded installation design of the positioning hole simplifies the traditional gluing or snap-fit ​​process between the magnetic ring and the substrate, improving assembly efficiency and avoiding manual adjustment errors. Furthermore, the embedded fit between the bottom of the magnetic ring and the substrate reduces the overall height, minimizing space occupation and avoiding safety risks caused by protruding components. Simultaneously, the open area formed by the positioning hole and the bottom of the magnetic ring enhances the heat dissipation efficiency of the coil and magnetic ring. Combined with the thermal conductivity of the substrate itself, this can delay component aging and extend service life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the vertical common mode inductor of this utility model;

[0020] Figure 2 for Figure 1 A bottom view;

[0021] Figure 3 This is an exploded view of yet another embodiment of the vertical common-mode inductor of this utility model;

[0022] Figure 4 This is a schematic diagram of one embodiment of the present utility model.

[0023] Illustration: 100, Vertical common mode inductor; 110, Magnetic ring; 112, Flange; 112a, Mating part; 120, Coil; 130, Substrate; 131, Lead; 132, Positioning hole; 132a, Chamfer; 133, Asymmetrical identification groove. Detailed Implementation

[0024] To make the technical objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "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 this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] This utility model embodiment provides a vertical common mode inductor 100.

[0028] Please see Figures 1 to 4 In one embodiment of the present invention, the vertical common mode inductor 100 includes a magnetic ring 110, a coil 120, and a substrate 130.

[0029] The coil 120 is wound around the magnetic ring 110 and fixed to the substrate 130;

[0030] The substrate 130 is provided with a plurality of pins 131, and the coil 120 is electrically connected to the pins 131;

[0031] The substrate 130 also has a positioning hole 132; when the coil 120 is fixedly installed on the substrate 130, the bottom of the magnetic ring 110 can be fixed in the positioning hole 132.

[0032] This utility model's vertical common-mode inductor 100 eliminates the installation misalignment problem caused by the symmetry of traditional circular magnetic rings 110 by embedding the bottom of the magnetic ring 110 into the positioning hole 132 of the substrate 130, using the hole wall to circumferentially limit and fix the magnetic ring 110. This results in a more upright product appearance and significantly improved dimensional consistency. Secondly, the one-step embedded installation design of the positioning hole 132 simplifies the traditional gluing or snap-fit ​​process between the magnetic ring 110 and the substrate 130, improving assembly efficiency and avoiding manual adjustment errors. Furthermore, the embedded fit between the bottom of the magnetic ring 110 and the substrate 130 reduces the overall height, minimizing space occupation and avoiding safety risks caused by protruding components. Simultaneously, the open area formed by the positioning hole 132 and the bottom of the magnetic ring 110 enhances the heat dissipation efficiency of the coil 120 and the magnetic ring 110. Combined with the thermal conductivity of the substrate 130 itself, this can delay component aging and extend service life.

[0033] Specifically, the magnetic ring 110 is made of ferrite; the coil 120 is typically made of copper wire; the substrate 130 can be an epoxy resin board, a fiberglass board, or a ceramic board. The pins 131 can be metal pins or solder terminals; the positioning holes 132 can be through holes or blind holes.

[0034] Please see Figures 1 to 3 In a specific embodiment, the magnetic ring 110 is a ring-shaped structure with a rectangular cross-section, and the positioning hole 132 is a rectangular hole so that the outer surface of the magnetic ring 110 is adapted to the positioning hole 132.

[0035] Optionally, the annular structure can be a perfect circular annular structure or an elliptical annular structure.

[0036] Furthermore, the width of the positioning hole 132 is greater than the thickness of the magnetic ring 110, and the length of the positioning hole 132 is less than the width of the positioning hole 132.

[0037] It is understood that, in this embodiment, the design of the positioning hole 132 can prevent the magnetic ring 110 from being misaligned relative to the substrate 130.

[0038] Furthermore, the positioning hole 132 is provided with a chamfer 132a. Specifically, the chamfer 132a is located at the entrance edge of the positioning hole 132, forming a guide slope with the bottom of the magnetic ring 110, guiding the magnetic ring 110 to be accurately embedded and avoiding the breakage of the mating material due to the sharp edge of the hole.

[0039] Please see Figure 3and Figure 4 In another preferred embodiment, the bottom of the magnetic ring 110 is provided with a flange 112 corresponding to the position of the positioning hole 132, and the flange 112 can be received in the positioning hole 132.

[0040] It is understood that in this embodiment, the flange 112 at the bottom of the magnetic ring 110 and the positioning hole 132 are embedded and engaged to constrain the position of the magnetic ring 110 in the circumferential direction, thus completely eliminating the installation misalignment problem caused by the lack of a positioning structure in traditional magnetic rings 110; and the limiting effect of the flange 112 enhances the connection strength between the magnetic ring 110 and the substrate 130, avoiding the risk of loosening under vibration or impact.

[0041] Optionally, when the positioning hole 132 is a blind hole, thermally conductive silicone grease is provided between the flange 112 and the positioning hole 132.

[0042] Please continue reading. Figure 3 and Figure 4 The sidewall of the positioning hole 132 is formed with an asymmetric identification groove 133, and the flange 112 has a mating part 112a that mates with the asymmetric identification groove 133.

[0043] It is understood that the asymmetric identification slot 133 is mainly used for error prevention during the installation of the coil 120. Specifically, the directional engagement between the asymmetric identification slot 133 and the mating part 112a of the flange 112 completely eliminates the risk of misjudgment of direction during manual assembly, ensuring that the magnetic ring 110 and the coil 120 can only be embedded into the substrate 130 at the only correct angle and direction, thus solving the problem of low efficiency caused by the reliance on marking or manual visual inspection in traditional symmetrical structures.

[0044] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A vertical common mode inductor, characterized by, The magnetic ring, the coil and the substrate are included; The coil is wound around the magnetic ring and fixed with the substrate; The substrate is provided with a plurality of pins, and the coil is conductively connected with the pins; The substrate is further formed with a positioning hole, and the bottom of the magnetic ring can be fixed in the positioning hole when the coil is fixedly installed with the substrate; The magnetic ring is a circular ring structure with a rectangular cross section, and the positioning hole is a rectangular hole, so that the outer surface of the magnetic ring is adapted to the positioning hole; The width of the positioning hole is greater than the thickness of the magnetic ring, and the length of the positioning hole is less than the width of the positioning hole.

2. The vertical common mode inductance of claim 1, wherein, The positioning hole is provided with a chamfer.

3. The vertical common mode inductance of claim 1, wherein, The bottom of the magnetic ring is provided with a flange corresponding to the position of the positioning hole, and the flange can be accommodated in the positioning hole.

4. The vertical common mode inductance of claim 3, wherein, Thermal conductive silicone grease is arranged between the flange and the positioning hole.

5. The vertical common mode inductance of claim 3, wherein, The side wall of the positioning hole is formed with an asymmetric identification groove, and the flange has a matching part matched with the asymmetric identification groove.

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