Plug-in inductor convenient for heat dissipation

Abstract

The utility model relates to the technical field of inductors, and particularly discloses a plug-in inductor convenient for heat dissipation, which comprises a shell formed by pressing magnetic powder, a coil, a rubber column body and two pins, the shell is provided with an accommodating cavity, and the accommodating cavity forms an opening in the bottom surface of the shell; the coil is wound on the rubber column body, the coil and the rubber column body are both located in the containing cavity, the two pins are connected with the two ends of the coil respectively, and the two pins extend out of the opening; the two ends of the rubber column body are pasted and fixed to the inner wall of the containing cavity after being subjected to hot melting. According to the plug-in inductor, the heat dissipation effect of the whole plug-in inductor is improved.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to a plug-in inductor that facilitates heat dissipation. Background Technology

[0002] Existing inductors mainly include surface mount inductors and through-hole inductors, both of which are widely used in the field of electronic circuits. Traditional through-hole inductors consist of a housing made of pressed magnetic powder, a coil inside the housing, and pins connected to the coil. To fix the coil, resin or other fillers are injected into the housing. After the resin solidifies, it wraps around the coil and occupies most of the space inside the housing, resulting in poor heat dissipation for the entire through-hole inductor. Utility Model Content

[0003] This invention provides a plug-in inductor that facilitates heat dissipation, thereby improving the overall heat dissipation effect of the plug-in inductor.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] This utility model provides a heat-dissipating plug-in inductor, comprising a shell made of magnetic powder, a coil, a plastic cylinder, and two pins; the shell has a receiving cavity with an opening on the bottom surface of the receiving cavity; the coil is wound on the plastic cylinder, both the coil and the plastic cylinder are located in the receiving cavity, the two pins are respectively connected to the two ends of the coil, and both pins extend from the opening; the two ends of the plastic cylinder are glued and fixed to the inner wall of the receiving cavity after being heat-melted.

[0006] In some embodiments, the two ends of the adhesive column form expansion sections, which are adhered and fixed to the inner wall of the accommodating cavity, and the width of the expansion section at the end near the inner wall of the accommodating cavity is greater than the outer diameter of the adhesive column.

[0007] In some embodiments, a portion of the coil is embedded in a rubber cylinder.

[0008] In some embodiments, a positioning groove is provided at the bottom of the housing, and the extending direction of the positioning groove is perpendicular to the axial direction of the coil.

[0009] In some embodiments, the coil and the two pins are integrally formed.

[0010] In some embodiments, the outer casing is square-shaped, and the opening is also square.

[0011] In some embodiments, the coil is spirally wound with two prongs extending from opposite corners of the opening.

[0012] The present invention has at least the following beneficial effects: The coil of the present invention is wound on a rubber cylinder, and the two ends of the rubber cylinder are glued and fixed to the inner wall of the accommodating cavity after being heat-melted. The rubber cylinder and the coil only occupy part of the space of the accommodating cavity, and the remaining large space of the accommodating cavity can be used to dissipate heat outward, thereby effectively improving the heat dissipation effect of the entire plug-in inductor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a heat-dissipating plug-in inductor according to an embodiment of the present invention.

[0014] Figure 2 This is an exploded view of a heat-dissipating plug-in inductor according to an embodiment of the present invention.

[0015] Figure 3 This is a bottom view of a heat-dissipating plug-in inductor according to an embodiment of the present invention.

[0016] The attached figures are labeled as follows:

[0017] Outer shell 100, receiving cavity 110, positioning groove 120;

[0018] Coil 200;

[0019] 300mm gel column, 310mm expansion section;

[0020] 400 pins. Detailed Implementation

[0021] This invention provides the following description with reference to the accompanying drawings to aid in a comprehensive understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered 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 invention.

[0022] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

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

[0024] Embodiments of this utility model provide a plug-in inductor that facilitates heat dissipation, such as... Figure 1-3 As shown, the device includes a housing 100 made of magnetic powder, a coil 200, a plastic cylinder 300, and two prongs 400. The magnetic powder is placed in a dedicated mold and then formed into the housing 100 through processes such as hot pressing. The housing 100 has a receiving cavity 110, with an opening formed on the bottom surface of the receiving cavity 110. The receiving cavity 110 is used to accommodate the coil 200 and the plastic cylinder 300, while the opening allows the coil 200 and the plastic cylinder 300 to be inserted into the receiving cavity 110 and allows the prongs 400 to extend out. The coil 200 is wound around the plastic cylinder 300, which can be made of hot melt adhesive. The formed plastic cylinder 300 can be inserted into the coil 200, or the coil 200 can be placed in a dedicated mold, and the hot melt adhesive adheres to the coil 200, forming the plastic cylinder 300 after cooling. Both the coil 200 and the adhesive cylinder 300 are located in the receiving cavity 110. Two pins 400 are connected to both ends of the coil 200, and both pins 400 extend from the opening to the bottom of the outer casing 100 for direct insertion into the circuit board. The adhesive cylinder 300 is made of hot melt adhesive and will melt when heated. Due to the coverage of the coil 200, the radial deformation of the adhesive cylinder 300 is small. After the two ends of the adhesive cylinder 300 are melted, they will be glued and fixed to the inner wall of the receiving cavity 110, thereby fixing the coil 200, the adhesive cylinder 300, and the two pins 400.

[0025] In this embodiment, the coil 200 is not fixed by filling the cavity 110. The glue column 300 and the coil 200 only occupy part of the space of the cavity 110. The remaining large space of the cavity 110 can be used to dissipate heat, thereby effectively improving the heat dissipation effect of the entire plug-in inductor.

[0026] In some embodiments, the two ends of the adhesive column 300 form expansion sections 310, which are adhered and fixed to the inner wall of the accommodating cavity 110. The width of the expansion section 310 near the inner wall of the accommodating cavity 110 is greater than the outer diameter of the adhesive column 300. After the adhesive column 300 is hot-melted, its hot melt adhesive has a certain fluidity. The end of the adhesive column 300 is not restricted by the coil 200, so it is easier to flow outward. The expansion section 310 can be formed into a trumpet-like shape. In the direction near the inner wall of the accommodating cavity 110, the width of the expansion section 310 gradually increases. Thus, the width of the expansion section 310 near the inner wall of the accommodating cavity 110 is greater than the outer diameter of the adhesive column 300. This can increase the contact area between the expansion section 310 and the inner wall of the accommodating cavity 110, increase the adhesion between the adhesive column 300 and the outer shell 100, and make the coil 200 and the adhesive column 300 more stably fixed in the outer shell 100.

[0027] In some embodiments, a portion of the coil 200 is embedded in the adhesive column 300. Specifically, after hot-melt adhesive is applied, a portion of the coil 200 is partially covered by the adhesive column 300, and after cooling, the portion of the coil 200 is embedded in the adhesive column 300. This strengthens the connection between the coil 200 and the adhesive column 300 through the adhesive force of the hot-melt adhesive itself, thus ensuring the stability of the coil 200.

[0028] In some embodiments, a positioning groove 120 is provided at the bottom of the housing 100. The extending direction of the positioning groove 120 is perpendicular to the axial direction of the coil 200. In this way, workers or automated equipment can place the coil 200 according to the extending direction of the positioning groove 120, ensuring that the coil 200 can be accurately placed into the receiving cavity 110 for product assembly.

[0029] In some embodiments, the coil 200 and the two pins 400 are integrally formed, eliminating the step of soldering the coil 200 and the pins 400, simplifying the overall manufacturing process, and strengthening the connection between the coil 200 and the pins 400.

[0030] Specifically, the coil 200 and the two pins 400 can be formed by bending a copper wire, with the middle section of the copper wire bent into the coil 200 and the two ends of the copper wire forming the two pins 400 respectively.

[0031] In some embodiments, the housing 100 is square and the opening is also square. Correspondingly, the receiving cavity 110 can also be square. Thus, the housing 100 is relatively regular, the distribution of magnetic powder is relatively uniform, and the inductance of the entire plug-in inductor is relatively uniform.

[0032] Furthermore, the coil 200 is spirally wound, and the two prongs 400 extend from two opposite corners of the opening. Under the same conditions, the size of the coil 200 can be made larger, which can maximize the use of the space of the accommodating cavity 110.

[0033] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, those skilled in the art should understand that the foregoing description of various embodiments of the present invention is for illustrative purposes only, and not intended to limit the present invention as defined by the appended claims and their equivalents.

Claims

1. A plug-in inductor with easy heat dissipation, characterized in that: The device includes a housing made of magnetic powder, a coil, a plastic cylinder, and two prongs; the housing has a receiving cavity with an opening on the bottom surface; the coil is wound on the plastic cylinder, both the coil and the plastic cylinder are located in the receiving cavity, and the two prongs are connected to the two ends of the coil, with both prongs extending from the opening; the two ends of the plastic cylinder are glued and fixed to the inner wall of the receiving cavity after being heat-melted.

2. The heat-dissipating plug-in inductor according to claim 1, characterized in that: The two ends of the adhesive column form expansion sections, which are attached and fixed to the inner wall of the accommodating cavity, and the width of the end of the expansion section near the inner wall of the accommodating cavity is greater than the outer diameter of the adhesive column.

3. The heat-dissipating plug-in inductor according to claim 1, characterized in that: A portion of the coil is embedded in a rubber cylinder.

4. The heat-dissipating plug-in inductor according to claim 1, characterized in that: The bottom of the outer casing is provided with a positioning groove, and the extension direction of the positioning groove is perpendicular to the axial direction of the coil.

5. The heat-dissipating plug-in inductor according to claim 1, characterized in that: The coil and the two pins are integrally formed.

6. The heat-dissipating plug-in inductor according to any one of claims 1-5, characterized in that: The outer shell is square in shape, and the opening is also square.

7. The heat-dissipating plug-in inductor according to claim 6, characterized in that: The coil is spirally wound, with two prongs extending from opposite corners of the opening.

Images