Mould pressing chip inductor

Abstract

The utility model belongs to the technical field of manufacturing of power components, and particularly relates to a mould pressing chip inductor which adopts a fixing piece structure, a plurality of communicated grooves are formed in a first side face, a second side face and a third side face of a fixing piece, and U-shaped conductors are fixedly arranged in the grooves. The second side face is adjacent to the first side face and the third side face, the bottom end of the U-shaped conductor is arranged on the second side face, and the opening end of the U-shaped conductor extends out of the fixing piece.

Description

Technical Field

[0001] The utility model belongs to the technical field of power component manufacturing, and specifically relates to a molded chip inductor. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] With the rapid development of microelectronics, semiconductor SOC, and IC, the performance requirements for power inductors are constantly increasing. Compared with traditional ferrite winding inductors, molded inductors have superior characteristics such as large current, low noise, magnetic shielding, high strength, and strong shock resistance. They are widely used in high-power DC-DC converters for smart mobile terminals, laptops, servers, new energy vehicles, graphics cards, and other products.

[0004] Molded inductors are inductors that use a mold to press magnetic powder and coils into shape at one time; because the coil and magnetic core are formed at one time, they are also called one-piece molded inductors.

[0005] Flat coils are used in existing molded inductors instead of round coils, but this will increase the volume of the molded inductors. In addition, the powder and the coil can be pressed together by applying huge external pressure. However, when the conductor insulation film in the coil is damaged or damaged, it will directly lead to a decrease in the device's voltage resistance or an increase in the risk of device failure. Utility Model Content

[0006] In order to solve the above problems, the utility model proposes a molded chip inductor, which adopts a U-shaped conductor to replace the traditional spiral winding coil, and the U-shaped conductor is pressed by a mold to obtain a molded inductor with large inductance and small volume suitable for high frequency and large current.

[0007] The solution of the utility model provides a molded chip inductor, which adopts the following technical solution:

[0008] A molded chip inductor adopts a fixing structure, wherein a plurality of interconnected grooves are provided on the first side, the second side and the third side of the fixing, a U-shaped conductor is fixedly arranged in the groove, the second side is respectively adjacent to the first side and the third side, the bottom end of the U-shaped conductor is arranged on the second side, and the open end of the U-shaped conductor extends out of the fixing.

[0009] As a further technical limitation, the first side surface and the third side surface are arranged opposite to each other.

[0010] As a further technical limitation, the depth of the groove matches the thickness of the U-shaped conductor.

[0011] As a further technical limitation, the width of the groove matches the width of the U-shaped conductor.

[0012] As a further technical limitation, the groove and the U-shaped conductor are connected by bonding.

[0013] As a further technical limitation, the molded chip inductor further includes a base disposed opposite to the second side.

[0014] Furthermore, the base is made of insulating material and includes a metal piece connected to the U-shaped conductor.

[0015] As a further technical limitation, the fixing member is made of insulating material, and the end of the U-shaped conductor is fixed to the fixing member by an adhesive.

[0016] As a further technical limitation, the open ends of different U-shaped conductors are connected.

[0017] As a further technical limitation, bottom ends of different U-shaped conductors are isolated from each other by the fixing member.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model adopts a U-shaped conductor to replace the traditional spiral winding coil. At the same time, the U-shaped conductor is placed in a fixing piece with a groove to avoid the displacement of the coil position. The fixing piece and the U-shaped conductor are pressed by a preset mold, and the tail-to-head connection between different U-shaped conductors is realized on a PCB or a plastic base to change the inductance from one circle to multiple circles, thereby obtaining a high-inductance, small-volume molded inductor suitable for high-frequency and large-current. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 It is a structural exploded schematic diagram of the internal fixing parts and conductor assembly of the molded inductor in the embodiment of the utility model;

[0022] Figure 2 This is a perspective schematic diagram of the structure of the fixing member after molding in the embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of the exploded structure of the molded chip inductor in the embodiment of the utility model;

[0024] Figure 4It is a schematic diagram of the manufacturing structure of the molded chip inductor in the embodiment of the utility model;

[0025] Among them, 1. fixing part; 2. U-shaped conductor; 3. base; 4. mold; 11. first side surface; 12. second side surface; 13. third side surface; 14. groove. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0030] In the present utility model, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present utility model can be determined according to specific circumstances, and they cannot be understood as limitations on the present utility model.

[0031] Example

[0032] This embodiment introduces a molded chip inductor.

[0033] like Figure 1 , Figure 2 and Figure 3A molded chip inductor shown in the figure comprises a fixing part 1, a U-shaped conductor 2 and a base 3; wherein, the fixing part 1 is provided with a plurality of grooves 14 provided with the U-shaped conductor 2; each groove 14 is provided on the first side surface 11, the second side surface 12 and the third side surface 13 of the fixing part 1; the bottom of the U-shaped conductor 2 is provided on the second side surface 12, the coil at the open end of the U-shaped conductor 2 extends out of the fixing part 1, and the coil of the parallel part of the U-shaped conductor 2 is provided on the first side surface 11 and the third side surface 13; the base 3 is provided on the side surface of the fixing part 1 opposite to the second side surface; after the coil at the open end of the U-shaped conductor 2 passes through the base 3, it becomes a terminal of the molded chip inductor.

[0034] It should be noted that the number and size of the grooves 14 match those of the U-shaped conductor 2 .

[0035] In order to improve the stability of the molded chip inductor, in addition to fixing the U-shaped conductor 2 by providing the groove junction 14, the U-shaped conductor 2 is fixed in the groove 14 by bonding, which effectively avoids the position deviation of the U-shaped conductor 2 on the fixing member 1.

[0036] It should be noted that the U-shaped conductor 2 in this embodiment adopts a large wire diameter coil, which effectively avoids the displacement of multi-layer and multi-turn coils due to force during the inductive pressing process, thereby affecting the utilization rate of the magnetic circuit of the magnet, causing the electrical characteristics to decline, and reducing the risk of short circuit.

[0037] The base in this embodiment is made of insulating material, and the U-shaped conductor 2 is fixed to the fixing member 1 by welding, and then protected by the base 3. The welding methods used include but are not limited to soldering, reflow soldering, ultrasonic welding and argon arc welding.

[0038] In this embodiment, the fixing member 1 is made of soft magnetic material to enhance the impedance frequency characteristic and saturation characteristic of the inductor.

[0039] During the preparation process of the molded chip inductor in this embodiment, Figure 4 As shown, the assembly can be achieved through a preset mold, that is, after the U-shaped conductor 2 is fixed on the fixing part 1, it is placed in a preset mold 4; the inductor terminal is pressed and formed by filling the inside of the mold 4 with magnetic powder; after pressing and forming, it is taken out from the mold 4, and then the base 3 is added to complete the entire manufacturing process of the molded chip inductor.

[0040] This embodiment uses a U-shaped conductor to replace the traditional spiral winding coil. At the same time, the U-shaped conductor is placed in a fixing member with a groove to avoid displacement of the coil position. The fixing member and the U-shaped conductor are pressed by a preset mold to obtain a high-inductance, small-volume molded inductor suitable for high-frequency and large current.

[0041] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0042] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A molded chip inductor, characterized in that: A fixing member structure is adopted, and a plurality of interconnected grooves are provided on the first side, the second side and the third side of the fixing member, a U-shaped conductor is fixedly arranged in the groove, the second side is adjacent to the first side and the third side respectively, the bottom end of the U-shaped conductor is arranged on the second side, and the open end of the U-shaped conductor extends out of the fixing member.

2. A molded chip inductor as claimed in claim 1, characterized in that: The first side surface and the third side surface are arranged opposite to each other.

3. A molded chip inductor as claimed in claim 1, characterized in that: The depth of the groove matches the thickness of the U-shaped conductor.

4. A molded chip inductor as claimed in claim 1, characterized in that: The width of the groove matches the width of the U-shaped conductor.

5. A molded chip inductor as claimed in claim 1, characterized in that: The groove and the U-shaped conductor are fixedly connected by bonding.

6. A molded chip inductor as claimed in claim 1, characterized in that: The molded chip inductor further includes a base disposed opposite to the second side.

7. A molded chip inductor as claimed in claim 6, characterized in that: The base is made of insulating material.

8. A molded chip inductor as claimed in claim 1, characterized in that: The fixing piece is made of insulating material, and the end of the U-shaped conductor is fixed to the fixing piece by adhesive.

9. A molded chip inductor as claimed in claim 1, characterized in that: The opening ends of different U-shaped conductors are connected.

10. A molded chip inductor as claimed in claim 1, characterized in that: The bottom ends of different U-shaped conductors are isolated from each other by the fixing member.

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