A wire-wound type patch magnetic bead

Abstract

The utility model discloses a kind of winding type's patch magnetic beads, to solve the problems such as low reliability of traditional laminated magnetic beads, weak current resistance, poor low-frequency filtering effect etc. The magnetic bead includes copper coil, magnetic core, magnet, rust-resistant insulating paint and conductive terminal;Copper coil is installed on magnetic core, magnetic core periphery fills magnetic powder and forms magnet by moulding, magnet surface is coated with rust-resistant insulating paint, after two ends rust-resistant insulating paint are stripped by laser or grinding, tin material is formed into conductive terminal by electroplating.The utility model improves the reliability of magnetic bead, current resistance and low-frequency filtering stability by winding structure and moulding process, and is suitable for the field of electronic equipment which has demand to low-frequency filtering and large current.

Description

Technical Field

[0001] This utility model belongs to the field of electronic equipment, and particularly relates to a wire-wound patch magnetic bead. Background Technology

[0002] Currently, most surface-mount ferrite beads on the market are manufactured using a lamination process, which involves stacking single ferrite films layer by layer (or printing a single layer as a thin film). However, this process has significant drawbacks: First, it has low reliability, as the ferrite bead is prone to internal fractures when subjected to stress and deformation, leading to complete failure. Second, the internal conductive terminals are relatively thin, resulting in high DC resistance and weak current withstand capability; most products can withstand currents below 5A. Third, ferrite beads made of thin ferrite film are best suited for applications in the 100MHz to 3GHz frequency range, and their filtering effect on low-to-mid-frequency signals below 100MHz is poor, making it difficult to meet the needs of low-to-mid-frequency applications. Utility Model Content

[0003] The purpose of this invention is to provide a wire-wound patch magnetic bead, aiming to solve the problems existing in the background art. To achieve this purpose, the technical solution adopted by this invention is:

[0004] A wire-wound patch magnetic bead includes a coil mounted on a magnetic core. The periphery of the magnetic core is filled with molded magnetic powder to form a magnet. The surface of the magnet is coated with anti-rust paint. The anti-rust paint on both sides of the magnet is peeled off by laser or grinding and then electroplated with electroplating material to form conductive terminals.

[0005] Preferably, the coil is a copper coil.

[0006] Preferably, the anti-rust paint is an anti-rust insulating paint.

[0007] Preferably, the electroplating material is tin.

[0008] The beneficial effects of this utility model are:

[0009] Significantly improves reliability: The coil adopts a wound coil structure, which has good ductility and deformation capability. Even if the magnetic bead breaks under stress, its characteristics can still be maintained, effectively reducing the risk of failure under stress.

[0010] Significantly improved current withstand characteristics: Compared with traditional multilayer magnetic beads, the average current withstand capability is improved, which can meet the needs of high current scenarios;

[0011] Optimizes mid-to-low frequency filtering performance: Amorphous composite materials or alloy magnetic materials are used, which have excellent filtering capabilities in the mid-to-low frequency range of 150KHz to 300MHz, making up for the shortcomings of traditional stacked magnetic beads in the frequency range below 100MHz.

[0012] Enhanced filtering stability: It has high saturation characteristics, slow impedance decay after load current, and can maintain good filtering effect for a long time. Attached Figure Description

[0013] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0014] Figure 2 A schematic diagram of the low-to-medium frequency impedance characteristics provided in this embodiment of the utility model;

[0015] Figure 3 Temperature thermal map of a 10A current provided for an embodiment of this utility model;

[0016] Figure 4 This is a temperature thermal diagram of a commercially available 5A current according to an embodiment of this utility model;

[0017] Figure 5 This is a schematic diagram of the impedance decay curve of an embodiment of the present invention;

[0018] Figure 6 This is a schematic diagram comparing the filtering effects of the stacked magnetic beads in this embodiment of the present invention with those of the present product.

[0019] The following are the labeling elements in the figure:

[0020] 1. Coil; 2. Magnetic core; 3. Magnet; 4. Anti-rust paint; 5. Electroplating material. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. The terms "upper end," "lower end," "left side," "right side," "front end," "rear end," and similar expressions used herein refer to the positional relationship with reference to the accompanying drawings.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0025] like Figures 1-4 As shown, this utility model embodiment provides a wire-wound patch magnetic bead, including a coil 1, the coil 1 is mounted on a magnetic core 2, the periphery of the magnetic core 2 is filled with molded magnetic powder to form a magnet 3, the surface of the magnet 3 is coated with anti-rust paint 4, and the anti-rust paint 4 on both sides of the magnet 3 is peeled off by laser or grinding and then electroplated with electroplating material 5 to form conductive terminals.

[0026] In this embodiment, coil 1 is a copper coil 1.

[0027] In this embodiment, anti-rust paint 4 is anti-rust insulating paint.

[0028] In this embodiment, the electroplating material 5 is tin.

[0029] Production principle:

[0030] Step 1: Use copper wire to make component coil 1;

[0031] Step 2: Molding the component core 2 using magnetic materials;

[0032] Step 3: Install coil 1 onto magnetic core 2 to form an assembly;

[0033] Step 4: Wrap the magnetic material powder around the assembly from step 3 and use molding to obtain component magnet 3;

[0034] Step 5: Apply an insulating varnish with anti-rust properties to the surface of component magnet 3 to form an anti-rust protective layer, thus obtaining a magnetic bead body to prevent rusting;

[0035] Step 6: Use laser or grinding to peel off the anti-rust protective layer at both ends of the magnetic bead body from Step 5, and then electroplating the component electroplating material 5 on the peeled-off anti-rust protective layer to form the conductive terminal of the magnetic bead.

[0036] The above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions also fall within the scope of the present utility model. The patent protection scope of the present utility model should be defined by the claims.

Claims

1. A wire-wound patch magnetic bead, characterized in that: The device includes a coil mounted on a magnetic core. The periphery of the magnetic core is filled with molded magnetic powder to form a magnet. The surface of the magnet is coated with anti-rust paint. The anti-rust paint on both sides of the magnet is peeled off by laser or grinding and then electroplated with electroplating material to form conductive terminals.

2. The wire-wound patch magnetic bead according to claim 1, characterized in that: The coil is a copper coil.

3. A wire-wound patch magnetic bead according to claim 2, characterized in that: The anti-rust paint is an anti-rust insulating paint.

4. A wire-wound patch magnetic bead according to claim 3, characterized in that: The electroplating material is tin.

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