Inductor with heat dissipation holes

Abstract

The utility model discloses an inductor with heat dissipation holes, which comprises a magnet, a coil and two electrode plates, the magnet is formed by pressing magnetic powder, the coil is embedded in the magnet, one ends of the two electrode plates are respectively connected with two ends of the coil, and the other ends of the two electrode plates respectively extend out of two side surfaces of the magnet; the top surface of the magnet is provided with a heat dissipation hole penetrating through the magnet, and the coil is arranged around the heat dissipation hole. The temperature of the inductor during working can be reduced, the performance of the inductor is guaranteed, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of integrated inductors, in particular to an inductor with heat dissipation holes. Background Art

[0002] Inductors are one of the important components in the field of electronic circuits. To facilitate the welding of inductors, the mainstream inductors are currently chip inductors. For example, the Chinese utility model patent with announcement number CN216054219U discloses an integrated inductor, which consists of a coil wrapped with magnetic powder, and the two ends of the coil are connected to the electrode sheet. Some of these integrated inductors will have the problem of heating after long-term operation, which will affect the performance of the inductor and reduce its service life. Utility Model Content

[0003] The utility model provides an inductor with heat dissipation holes, which can reduce the working temperature of the inductor, ensure the performance of the inductor and prolong the service life.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] An embodiment of the utility model provides an inductor with heat dissipation holes, comprising a magnet, a coil and two electrode sheets, wherein the magnet is formed by pressing magnetic powder, the coil is buried in the magnet, one end of the two electrode sheets is respectively connected to the two ends of the coil, and the other ends of the two electrode sheets extend from the two side surfaces of the magnet respectively; the top surface of the magnet is provided with a heat dissipation hole penetrating the magnet, and the coil is arranged around the heat dissipation hole.

[0006] In some embodiments, the heat dissipation hole consists of a straight tube portion and a flared portion, wherein the flared portion is located above the straight tube portion and connected to the straight tube portion; in its axial direction, the inner diameter of the straight tube portion remains unchanged, and the coil surrounds the straight tube portion; in the upward extending direction, the inner diameter of the flared portion gradually increases.

[0007] In some embodiments, the cross-sectional shape of the inner wall of the flared portion is arc-shaped.

[0008] In some embodiments, the electrode sheet includes a connecting portion, a lead portion and a welding portion connected in sequence, the connecting portion is buried in the magnet and connected to the end of the coil, the lead portion is located on the side of the magnet, and the welding portion is located on the bottom of the magnet.

[0009] In some embodiments, a slot is provided on a side of the magnet, and the lead-out portion is located in the slot.

[0010] In some embodiments, the width of the slot gradually increases in a downward extending direction.

[0011] In some embodiments, a bottom surface of the magnet is provided with a bottom groove connected to the slot, and the welding portion is located in the bottom groove.

[0012] The utility model has at least the following beneficial effects: the utility model has a heat dissipation hole penetrating the magnet on the top surface of the magnet. When the inductor is working and generates heat, the heat can be dissipated not only from the outer side of the magnet, but also through the heat dissipation hole, thereby reducing the working temperature of the inductor, ensuring the performance of the inductor, and extending the service life of the inductor; at the same time, the coil is buried in the magnet and arranged around the heat dissipation hole, which does not affect the stability of the inductor value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of an inductor with heat dissipation holes according to an embodiment of the utility model;

[0014] Figure 2 A cross-sectional schematic diagram of an inductor with heat dissipation holes according to an embodiment of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of a coil and an electrode sheet in one embodiment of the utility model;

[0016] Figure 4 This is a schematic structural diagram of an inductor with heat dissipation holes according to an embodiment of the utility model, viewed from the bottom.

[0017] Wherein, the accompanying drawings are marked as follows:

[0018] Magnet 100, heat dissipation hole 110, straight tube portion 111, flared portion 112, slot 120, bottom slot 130;

[0019] Coil 200;

[0020] Electrode sheet 300 , connecting portion 310 , lead-out portion 320 , welding portion 330 . DETAILED DESCRIPTION

[0021] The utility model provides the following description with reference to the accompanying drawings to help fully understand the various embodiments of the utility model as defined by the claims and their equivalents. The description includes various specific details to help understanding, but these details should be regarded as exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the utility model.

[0022] In the description of the present invention, descriptions of orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] It will be understood that when one element (eg, a first element) is “connected” to another element (eg, a second element), the element may be directly connected to the other element or an intervening element (eg, a third element) may be present between the element and the other element.

[0024] The embodiment of the utility model provides an inductor with heat dissipation holes, such as Figure 1-4 As shown, the magnet 100, the coil 200 and two electrode sheets 300 are included. The magnet 100 is pressed by magnetic powder. Specifically, the magnetic powder can be poured into a mold and made into the magnet 100 after hot pressing. The coil 200 is buried in the magnet 100. Before pressing the magnetic powder, the coil 200 is also placed in the mold to be pressed and formed integrally with the magnet 100. One end of the two electrode sheets 300 is respectively connected to the two ends of the coil 200, and the other ends of the two electrode sheets 300 extend from the two sides of the magnet 100. For the convenience of distinguishing and explaining, the two electrode sheets 300 can be defined as a first electrode sheet and a second electrode sheet respectively. One end of the first electrode sheet is connected to one end of the coil 200, and the other end of the first electrode sheet extends from one side of the magnet. One end of the second electrode sheet is connected to the other end of the coil 200, and the other end of the second electrode sheet extends from the other side opposite to the magnet. The electrode sheet 300 extending out of the magnet 100 is used to connect the circuit so that the coil 200 is powered on and works. The top surface of the magnet 100 is provided with a heat dissipation hole 110 that penetrates the magnet 100, and the coil 200 is arranged around the heat dissipation hole 110. Of course, the opening of the heat dissipation hole 110 should not have a significant impact on the key parameters of the inductor as a whole. The loss caused by the opening of the heat dissipation hole 110 can be compensated by changing the size of the magnet 100 and the number of turns of the coil 200 through a limited number of experiments.

[0025] When the inductor of this embodiment generates heat during operation, the heat can be dissipated not only from the outer side of the magnet 100, but also through the heat dissipation holes 110, thereby reducing the operating temperature of the inductor, ensuring the performance of the inductor, and extending the service life of the inductor. At the same time, the coil 200 is buried in the magnet 100 and arranged around the heat dissipation holes 110, which well avoids the coil 200 and does not affect the stability of the inductor value.

[0026] In some embodiments, the heat dissipation hole 110 is composed of a straight tube portion 111 and a flared portion 112. The flared portion 112 is located above the straight tube portion 111 and is connected to the straight tube portion 111. In its axial direction, the inner diameter of the straight tube portion 111 remains unchanged and is in the shape of a straight tube, and the coil 200 surrounds the straight tube portion 111; in the upward extending direction, the inner diameter of the flared portion 112 gradually increases, which can increase the caliber of the opening of the heat dissipation hole 110 and also increase the area of the inner wall of the heat dissipation hole 110, thereby improving the heat dissipation effect.

[0027] Furthermore, the cross-sectional shape of the inner wall of the flared portion 112 is arc-shaped. The arc-shaped structure is smoother, and the formed inductor is not easily stuck on the mold, which is convenient for demolding.

[0028] In some embodiments, the electrode piece 300 includes a connecting portion 310, a lead-out portion 320, and a welding portion 330 that are connected in sequence. The connecting portion 310 is embedded in the magnet 100 and is connected to the end of the coil 200. The lead-out portion 320 is located on the side of the magnet 100, and the welding portion 330 is located on the bottom surface of the magnet 100. The welding portion 330 is used for welding to fix the entire inductor to the circuit board. Among them, the connecting portion 310 and the lead-out portion 320 can be vertically connected, and the lead-out portion 320 and the welding portion 330 can also be vertically connected. The cross-sectional shape of the entire electrode piece 300 forms a shape similar to a "凵" character. The connecting portion 310, the lead-out portion 320, and the welding portion 330 can be formed by bending an electrode plate, which is convenient for integral molding.

[0029] Furthermore, a slot 120 is provided on the side surface of the magnet 100, and the lead-out portion 320 is located in the slot 120, which makes the lead-out portion 320 not protrude from the side surface of the magnet 100, and the side surface of the magnet 100 is relatively flat and is not likely to interfere with adjacent components on the circuit board.

[0030] Even further, in the downward extending direction, the width of the slot 120 gradually increases to easily bend the lead-out portion 320 into the slot 120, reduce the difficulty of alignment, and facilitate the bending operation.

[0031] In some embodiments, a bottom slot 130 communicating with the slot 120 is provided on the bottom surface of the magnet 100, and the welding portion 330 is located in the bottom slot 130. After the lead-out portion 320 is bent, the welding portion 330 is directly located in the bottom slot 130. The bottom slot 130 can accommodate the solder liquid, which is convenient for soldering to fix the inductor.

[0032] The terms and words used in the above description and claims are not limited to the literal meanings, but are only used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, those skilled in the art should clearly understand that the above description of various embodiments of the present invention is only for the purpose of illustration, rather than to limit the present invention as defined by the appended claims and their equivalents.

Claims

1. An inductor with a heat dissipation hole, characterized in that: It includes a magnet, a coil and two electrode sheets. The magnet is pressed from magnetic powder. The coil is buried in the magnet. One end of the two electrode sheets is respectively connected to the two ends of the coil, and the other ends of the two electrode sheets extend from the two sides of the magnet. The top surface of the magnet is provided with a heat dissipation hole that penetrates the magnet, and the coil is arranged around the heat dissipation hole.

2. The inductor with heat dissipation holes according to claim 1, characterized in that: The heat dissipation hole consists of a straight tube part and a flared part, wherein the flared part is located above the straight tube part and connected to the straight tube part; in its axial direction, the inner diameter of the straight tube part remains unchanged, and the coil surrounds the straight tube part; in the upward extending direction, the inner diameter of the flared part gradually increases.

3. The inductor with heat dissipation holes according to claim 2, characterized in that: The cross-sectional shape of the inner wall of the flared portion is arc-shaped.

4. The inductor with heat dissipation holes according to any one of claims 1 to 3, characterized in that: The electrode sheet includes a connecting portion, a lead-out portion and a welding portion which are connected in sequence, the connecting portion is buried in the magnet and connected to the end of the coil, the lead-out portion is located on the side of the magnet, and the welding portion is located on the bottom of the magnet.

5. The inductor with heat dissipation holes according to claim 4, characterized in that: A slot is provided on the side of the magnet, and the lead-out portion is located in the slot.

6. The inductor with heat dissipation holes according to claim 5, characterized in that: In the downward extending direction, the width of the slot gradually increases.

7. The inductor with heat dissipation holes according to claim 5, characterized in that: The bottom surface of the magnet is provided with a bottom groove connected with the slot, and the welding part is located in the bottom groove.

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