Ultrathin TV anti-interference common-mode filter

Abstract

An ultra-thin TV anti-interference common-mode filter comprises a plastic base, a ferrite magnetic core and a magnetic plate. A groove is formed in a block body arranged in the center of the top of the plastic base, and the magnetic plate is arranged at the bottom of the plastic base; the ferrite magnetic core is arranged in the center of an inner cavity of the plastic base, and a surrounding electric wire is wound on the ferrite magnetic core. According to the ultra-thin TV anti-interference common-mode filter, the magnetic plate is additionally arranged on the plastic base, magnetic lines of force of the common-mode filter are prevented from being emitted downwards, an iron plate on the whole machine is free of interference of the magnetic lines of force, noise cannot be generated, and therefore noise generated by interaction of the common-mode filter and the iron plate on the TV whole machine is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of common mode filters, in particular to an ultra-thin TV anti-interference common mode filter. Background Art

[0002] A filter is a filter circuit composed of capacitors, inductors and resistors. The filter can effectively filter out a specific frequency point in the power line or frequencies outside the frequency point to obtain a power signal of a specific frequency, or eliminate the power signal after a specific frequency. Common-mode filters usually use ferrite cores and bifilar windings. The low differential-mode noise signal suppresses interference sources, is difficult to deform in high-speed signals, has excellent noise suppression measures, and has high common-mode noise suppression and low differential-mode noise signal suppression.

[0003] However, when the existing common-mode filter is working, the common-mode filter generates magnetic lines of force, which pass through the iron plate, causing the common-mode filter to have a strong effect on the iron plate on the TV set, thereby causing noise to be generated. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an ultra-thin TV anti-interference common mode filter.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] An ultra-thin TV anti-interference common-mode filter comprises: a plastic base, a ferrite core, and a magnetic plate; a groove is provided on a block centrally disposed at the top of the plastic base, and the magnetic plate is disposed at the bottom of the plastic base; the ferrite core is disposed in the center of an inner cavity of the plastic base, and a surrounding wire is wound around the ferrite core.

[0007] In one embodiment, the top view of the plastic base is in the shape of a square, and the center of the top thereof is convex outward, and the groove is located in the center of the convexity.

[0008] In one embodiment, a step is provided in the groove body, and the magnetic plate is located in the step.

[0009] In one embodiment, the top view surface of the magnetic plate is circular, and the diameter of the top view surface matches the diameter of the top view surface of the groove body, and the magnetic plate is made of magnetic material.

[0010] In one embodiment, PIN pins are provided at the four corners of the top of the plastic base, and one end of the lead-out wire surrounding the electric wire is connected to the PIN pins.

[0011] In one embodiment, the ferrite core is disposed in the center of the inner cavity of the plastic base, and the ferrite core is annular in shape when viewed from above, and the surrounding wires are wrapped around the magnets on the left and right sides thereof.

[0012] In one embodiment, a locking plate is provided at the center of the bottom of the plastic base, and both ends of the locking plate on a side away from the inner cavity of the plastic base are movably connected to fixed blocks.

[0013] In one embodiment, the diameter of the top view surface of the groove is adapted to the length of the top view surface of the plastic base.

[0014] In one embodiment, the bottom of the inner cavity of the plastic base is hollowed out, and the size of the hollowed-out top surface is larger than the size of the top surface of the ferrite core. The ferrite core is injection-molded in the middle of the bottom of the plastic base for insulation.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] The utility model provides an ultra-thin TV anti-interference common-mode filter. By adding a magnetic plate to a plastic base, the magnetic lines of force that block the common-mode filter are emitted downward. The iron plate on the entire TV set is not interfered by the magnetic lines of force and will not generate noise, thereby preventing noise generated by the interaction between the common-mode filter and the iron plate on the TV set. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the front three-dimensional structure of the ultra-thin TV anti-interference common mode filter of the utility model;

[0019] Figure 2 This is a schematic diagram of the bottom-up three-dimensional structure of the ultra-thin TV anti-interference common-mode filter of the utility model;

[0020] Figure 3 This is a schematic diagram of the top view of the structure of the ultra-thin TV anti-interference common mode filter of the utility model.

[0021] In the figure: 1. Plastic base; 11. PIN pin; 12. Fixing block; 13. Groove; 2. Ferrite core; 21. Wrap-around wire; 3. Magnetic plate. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention 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 comprehensive understanding of the disclosure of the present invention.

[0023] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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 cannot be understood as a limitation on this application.

[0024] Unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] like Figure 1-3 As shown, an ultra-thin TV anti-interference common-mode filter includes: a plastic base 1, a ferrite core 2, and a magnetic plate 3; a groove 13 is provided on a block provided in the center of the top of the plastic base 1, and the magnetic plate 3 is provided at the bottom of the plastic base 1; the ferrite core 2 is provided in the center of the inner cavity of the plastic base 1, and a surrounding wire 21 is wound around the ferrite core 2. It should be noted that when the common-mode filter is fixed to the TV set, the common-mode filter generates magnetic lines of force during operation, and the magnetic plate 3 blocks the magnetic lines of force of the common-mode filter, so that the iron plate on the TV set will not be interfered by the magnetic lines of force, thereby preventing the iron plate and the common-mode filter from generating a strong interaction, and therefore no noise will be generated during operation. The shape of the plastic base 1 can be circular, square, or any other shape, and the display in this technical solution is only one of them.

[0027] like Figure 1-3 As shown in the figure, in one embodiment, the top view of the plastic base 1 is square, and the center of its top is raised outward, and the groove 13 is located in the center of this raised area. A step is provided in the groove 13, and the magnetic plate 3 is located in this step. It should be noted that the thickness of the step is the same as that of the magnetic plate 3. The top view of the groove 13 can be circular, square, or any other shape. The embodiment shown in this technical solution is only one example.

[0028] like Figure 1-3 As shown, in one embodiment, the top view of the magnetic plate 3 is circular, and the diameter of the top view matches the diameter of the top view of the groove 13. The magnetic plate 3 is made of a magnetic material. It should be noted that the magnetic plate 3 is made of a magnetic material such as nanocrystalline or ferrite, and the shape of the magnetic plate 3 can be circular, square, or any other shape. The embodiment shown in this technical solution is only one example.

[0029] like Figure 1-3 As shown in the figure, in one embodiment, PIN pins 11 are provided at the four corners of the top of the plastic base 1, and one end of the lead wire of the wraparound wire 21 is connected to the PIN pins 11. It should be noted that there are two wraparound wires 21, each wrapped around the block of the ferrite core 2, and the two ends of the two wires are connected to the corresponding PIN pins 11.

[0030] like Figure 1-3 As shown in the figure, in one embodiment, a ferrite core 2 is disposed in the center of the inner cavity of a plastic base 1. The ferrite core 2 is annular in shape when viewed from above, and a surrounding wire 21 is wrapped around the magnets on its left and right sides. It should be noted that the ferrite core 2 and the surrounding wire 21 thereon are arranged in a mirrored manner with the plastic base 1 as the center. The shape of the ferrite core 2 can be circular, square, or any other shape. The embodiment shown in this technical solution is only one example.

[0031] like Figure 1-3 As shown, in one embodiment, a retaining plate is provided in the center of the bottom of the plastic base 1. Both ends of the retaining plate, away from the inner cavity of the plastic base 1, are movably connected to fixed blocks 12. It should be noted that the fixed blocks 12 are fixed to the two ends of the bottom of the ferrite core 2, and the retaining plate in the middle is clamped together, thereby fixing the ferrite core 2 in the plastic base 1.

[0032] like Figure 1-3As shown, in one embodiment, the diameter of the top view of the groove 13 is adapted to the length of the top view of the plastic base 1. The bottom of the inner cavity of the plastic base 1 is a hollowed-out design, and the size of its hollowed-out top view is larger than the size of the top view of the ferrite core 2. It should be noted that the diameter of the top view of the ferrite core 2 is matched with the diameter of the top view of the groove 13, and the ferrite core 2 is formed in the plastic base 1 by injection molding. After the ferrite core 2 is designed into the required shape, it is placed in a mold for injection molding to play an insulating role. The ferrite core 2 can also be made of nanocrystalline material.

[0033] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. An ultra-thin TV anti-interference common mode filter, characterized in that: include: A plastic base (1), a ferrite core (2) and a magnetic plate (3); a groove (13) is provided on a block arranged at the center of the top of the plastic base (1), and the magnetic plate (3) is arranged at the bottom of the plastic base (1); the ferrite core (2) is arranged at the center of the inner cavity of the plastic base (1), and a surrounding wire (21) is wound around the ferrite core (2).

2. The ultra-thin TV anti-interference common mode filter according to claim 1, characterized in that: The shape of the plastic base (1) when viewed from above is square, and the center of its top is convex outward, and the groove (13) is located in the center of the convexity.

3. The ultra-thin TV anti-interference common mode filter according to claim 1, characterized in that: A step is provided in the groove body of the groove (13), and the magnetic plate (3) is located in the step.

4. The ultra-thin TV anti-interference common mode filter according to claim 1, characterized in that: The top view of the magnetic plate (3) is circular, and the diameter of the top view matches the diameter of the top view of the groove body (13). The magnetic plate (3) is made of magnetic material.

5. The ultra-thin TV anti-interference common mode filter according to claim 1, characterized in that: PIN pins (11) are provided at the four corners of the top of the plastic base (1), and one end of the lead-out wire of the surrounding electric wire (21) is connected to the PIN pins (11).

6. The ultra-thin TV anti-interference common mode filter according to claim 1, characterized in that: The ferrite core (2) is arranged in the center of the inner cavity of the plastic base (1), and the top view of the ferrite core (2) is in the shape of a ring, and the surrounding wire (21) surrounds the magnets on the left and right sides thereof.

7. The ultra-thin TV anti-interference common mode filter according to claim 1, characterized in that: A locking plate is provided at the center of the bottom of the plastic base (1), and both ends of the locking plate on the side away from the inner cavity of the plastic base (1) are movably connected to fixed locking blocks (12).

8. The ultra-thin TV anti-interference common mode filter according to claim 1, characterized in that: The diameter of the top view of the groove (13) is adapted to the length of the top view of the plastic base (1).

9. The ultra-thin TV anti-interference common mode filter according to claim 1, characterized in that: The bottom of the inner cavity of the plastic base (1) is of a hollowed-out design, and the size of the hollowed-out top surface is larger than the size of the top surface of the ferrite core (2). The ferrite core (2) is injection-molded in the middle of the bottom of the plastic base (1) for insulation.

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