Combined inductor with flat coil

Abstract

The utility model relates to the technical field of inductors, and particularly discloses a combined inductor with a flat coil, which comprises an upper body, a base, a coil and two electrode plates, the base comprises a bottom plate and a central column arranged on the top surface of the bottom plate, the coil is formed by winding a flat wire, and the coil sleeves the outer side of the central column; the two electrode plates are integrally formed with the two ends of the wire respectively, each electrode plate comprises an upper part and a lower part, the end parts of the wire, the upper parts of the electrode plates and the lower parts of the electrode plates are connected in sequence, and the lower parts of the electrode plates are bent to the bottom surface of the bottom plate; the upper body and the base are integrally formed through hot pressing, and the coil and the upper portion of the electrode plate are wrapped in the upper body and the base. The height of the inductor can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to a combined inductor with a flat coil. Background Technology

[0002] Inductors are among the most common electronic components, and most circuit boards contain them. As circuit board integration increases, manufacturers are placing greater emphasis on miniaturizing electronic components to reduce their footprint on the board. For multilayer circuit boards, the height of electronic components affects the spacing between adjacent boards. Existing inductors are relatively tall, and conventional structural designs struggle to reduce their height. Utility Model Content

[0003] This invention provides a combined inductor with a flat coil, which can reduce the height of the inductor.

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

[0005] This utility model provides a combined inductor with a flat coil, including an upper body, a base, a coil, and two electrode plates. The base includes a bottom plate and a central column disposed on the top surface of the bottom plate. The coil is wound from a flat wire and is sleeved on the outside of the central column. The two electrode plates are integrally formed with the two ends of the wire, and each electrode plate includes an upper part and a lower part. The end of the wire, the upper part of the electrode plate, and the lower part of the electrode plate are sequentially connected. The lower part of the electrode plate is bent to the bottom surface of the bottom plate. The upper body and the base are integrally formed by hot pressing, and the upper part of the coil and the electrode plates are covered inside.

[0006] In some embodiments, the upper part of the electrode sheet includes a transition portion and a connecting portion, and the end of the wire, the transition portion, the connecting portion and the lower part of the electrode sheet are sequentially connected; the width of the transition portion gradually increases in the direction extending from the end of the wire to the connecting portion.

[0007] In some embodiments, the end of the base plate is provided with a notch, the notch penetrates the base plate along the thickness direction, and the connecting portion passes through the notch.

[0008] In some embodiments, the connecting portion extends in a vertical direction.

[0009] In some embodiments, the central column is an elliptical cylinder, the coil is wound in an elliptical shape adapted to the central column, and the major axis of the cross-section of the central column is parallel to the length direction of the base plate.

[0010] In some embodiments, the two electrode plates are respectively disposed on both sides of the base plate along its length.

[0011] In some embodiments, the wire is spirally wound and has 1.5 turns.

[0012] This invention has at least the following advantages: The coil of this invention is made of flat wire, which reduces the height of the coil compared to traditional round wire, thereby reducing the height of the inductor; at the same time, the electrode sheet is integrally formed with the wire, and the lower part of the electrode sheet is bent to the bottom surface of the base plate. Since the electrode sheet is a sheet structure, its thickness is relatively thin, resulting in a small distance between the electrode sheet and the bottom surface of the base plate, which also reduces the height of the inductor; in addition, the upper body and the base are separate structures, integrally formed after hot pressing, resulting in higher density and a smaller size of the inductor; therefore, this invention can effectively reduce the height of the inductor and meet the mounting requirements of the circuit board. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a combined inductor with a flat coil according to an embodiment of the present invention;

[0014] Figure 2 This is an exploded schematic diagram of a combined inductor with a flat coil according to an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the structure of the base, coil, and electrode sheet according to one embodiment of the present invention.

[0016] The attached figures are labeled as follows:

[0017] Upper body 100,

[0018] Base 200, base plate 210, notch 211, center column 220;

[0019] Coil 300;

[0020] Electrode sheet 400, upper part 410, transition part 411, connecting part 412, lower part 420. 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] An embodiment of this utility model provides a combined inductor with a flat coil, such as... Figure 1-3 As shown, the inductor includes an upper body 100, a base 200, a coil 300, and two electrode plates 400. Both the upper body 100 and the base 200 are made of magnetic powder and can be pre-formed using different molds. The bottom surface of the upper body 100 can be provided with a receiving groove to accommodate the coil 300. The base 200 includes a base plate 210 and a central post 220 located on the top surface of the base plate 210, extending vertically upwards. The coil 300 is made by winding a flat conductor, which can be made of copper wire. The copper wire is flattened by extrusion or flattening. The thickness of the flattened conductor is smaller than the outer diameter of the original conductor, thus reducing the height of the coil 300 and contributing to a reduction in the overall height of the inductor.

[0025] The coil 300 is sleeved on the outside of the central post 220, which positions the coil 300 and restricts its lateral movement. Two electrode plates 400 are integrally formed with the ends of a wire. Both the electrode plate 400 and the coil 300 could originally be a single wire; the ends of the wire are formed into sheet-like electrode plates 400 by compression or flattening, while the middle portion forms the coil 300. The electrode plates 400 are thinner. Each electrode plate 400 includes an upper part 410 and a lower part 420. The ends of the wire, the upper part 410, and the lower part 420 are sequentially connected. The lower part 420 is bent to the bottom surface of the base plate 210 to expose the bottom surface of the inductor, allowing the two lower parts 420 to be soldered to a circuit board. This allows external circuitry to energize the coil 300, enabling the inductor to operate. Since the electrode sheet 400 is a sheet structure and its thickness is relatively thin, the distance by which the lower part 420 of the electrode sheet 400 protrudes from the bottom surface of the base plate 210 is small, which can also reduce the height of the inductor.

[0026] The upper body 100 and the base 200 are integrally formed by thermoforming, covering the upper part 410 of the coil 300 and the electrode plate 400, while the lower part 420 of the electrode plate 400 is exposed. The upper body 100 and the base 200 were initially separate structures, then integrally formed by thermoforming, resulting in higher density and a relatively smaller overall inductor size, allowing for further reduction in inductor height. Therefore, this embodiment effectively reduces the inductor height and minimum inductance value, meeting the mounting requirements of the circuit board.

[0027] In some embodiments, the upper portion 410 of the electrode sheet 400 includes a transition portion 411 and a connecting portion 412, and the end of the wire, the transition portion 411, the connecting portion 412, and the lower portion 420 of the electrode sheet 400 are sequentially connected. The width of the transition portion 411 gradually increases in the direction extending from the end of the wire to the connecting portion 412. This structure can adapt to the transition from a flat wire to a sheet-like electrode sheet, ensuring a smooth structural transition and facilitating overall manufacturing.

[0028] Furthermore, a notch 211 is provided at the end of the base plate 210. The notch 211 penetrates the base plate 210 along the thickness direction. The connecting part 412 passes through the notch 211. On the one hand, the connecting part 412 can be positioned by the notch 211 to accurately control the orientation of the electrode sheet 400 and restrict the movement of the electrode sheet 400 relative to the base plate 210. On the other hand, this makes the connecting part 421 relatively recessed, and the upper body 100 can more easily cover the upper part 410 of the electrode sheet 400.

[0029] In some embodiments, the connecting portion 412 extends in a vertical direction, making the outer surface of the connecting portion 412 relatively regular, making it easier for the upper body 100 to cover the upper portion 410 of the electrode sheet 400, and reducing the length or width of the upper body 100.

[0030] In some embodiments, the center post 220 is an elliptical cylinder, and the coil 300 is wound in an elliptical shape adapted to the center post 220. The center post 220 is an elliptical cylinder with an elliptical cross-section. The major axis of the cross-section of the center post 220 is parallel to the length direction of the base plate 210. Compared with a circular coil, this embodiment can set the entire inductor to a cuboid shape, thereby reducing the width of the inductor.

[0031] In some embodiments, the two electrode plates 400 are respectively disposed on both sides of the base plate 210 along its length, rather than on the same side of the base plate 210. This can increase the distance between the two electrode plates 400, thereby extending the magnetic circuit.

[0032] In some embodiments, the wire is spirally wound 1.5 times, which ensures that a sufficient magnetic field strength can be formed, while preventing the height difference between the two ends of the wire from being too large, thus facilitating the formation of two electrode plates 400.

[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 combined inductor with a flat coil, characterized in that: The device includes an upper body, a base, a coil, and two electrode plates. The base includes a bottom plate and a central column disposed on the top surface of the bottom plate. The coil is made of a flat wire and is sleeved on the outside of the central column. The two electrode plates are integrally formed with the two ends of the wire, and each electrode plate includes an upper part and a lower part. The end of the wire, the upper part of the electrode plate, and the lower part of the electrode plate are sequentially connected. The lower part of the electrode plate is bent to the bottom surface of the bottom plate. The upper body and the base are integrally formed by hot pressing, and the upper part of the coil and the electrode plates are covered inside.

2. The combined inductor with a flat coil according to claim 1, characterized in that: The upper part of the electrode sheet includes a transition portion and a connecting portion, and the end of the wire, the transition portion, the connecting portion and the lower part of the electrode sheet are connected in sequence; the width of the transition portion gradually increases in the direction extending from the end of the wire to the connecting portion.

3. The combined inductor with a flat coil according to claim 2, characterized in that: The bottom plate has a notch at its end, which extends through the bottom plate along its thickness direction, and the connecting part passes through the notch.

4. The combined inductor with a flat coil according to claim 2, characterized in that: The connecting portion extends in the vertical direction.

5. The combined inductor with a flat coil according to any one of claims 1-4, characterized in that: The central column is elliptical in shape, and the coil is wound in an elliptical shape that matches the central column. The major axis of the cross-section of the central column is parallel to the length direction of the base plate.

6. The combined inductor with a flat coil according to any one of claims 1-4, characterized in that: Two electrode plates are respectively set on both sides of the base plate along its length.

7. The combined inductor with a flat coil according to any one of claims 1-4, characterized in that: The wire is spirally wound with 1.5 turns.

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