Filter

Abstract

The utility model relates to a thin filter, which belongs to the technical field of filters, and comprises a body, a first surface, a second surface and a third surface, the body defines a first surface, the at least one coil group defines a second surface, the at least one coil group is arranged inside the body, the second surface is parallel to the first surface, the at least one coil group comprises a first coil and a second coil which are overlapped with each other, two ends of the first coil respectively bend and extend to form a first pin, and the first pin is connected with the second pin. The two ends of the second coil are respectively bent to form a second pin, and an insulator is arranged between the first coil and the second coil. Therefore, the at least one coil group can be arranged in the body in a flat lying manner, and the at least one coil group comprises the first coil and the second coil which are overlapped with each other, so that the purposes of reducing the overall height and meeting the thinning requirement are achieved.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a thin filter. Background Technology

[0002] Please see Figure 9 and Figure 10 As shown, the existing filter includes a body 3 and a coil group 4. The coil group 4 is located inside the body 3. The body 3 defines a first surface 30, and the coil group 4 defines a second surface 40, which is perpendicular to the first surface 30. The coil group 4 includes a first coil 41 and a second coil 42 that are superimposed on each other. Please refer to... Figure 11 As shown, because the coil group 4 of the existing filter is vertically mounted on the body 3, the height H1 of the existing filter is relatively high when it is mounted on the circuit board 50. However, the high height of the existing filter causes the following problems:

[0003] 1. Poor stability: Because the coil group 4 of the existing filter is vertically set on the body 3, the center of gravity is high, making it easy to shake or fall off under mechanical vibration or impact.

[0004] Second, it occupies a relatively large area on the printed circuit board (PCB). However, it is quite tall, which may affect the overall design of the product, especially in space-constrained applications.

[0005] Third, production automation is difficult: existing filters usually require manual soldering or special insertion machines, which affects production efficiency and increases manufacturing costs.

[0006] Therefore, how to eliminate the above-mentioned deficiencies is the technical difficulty that the inventors of this case want to solve. Utility Model Content

[0007] The purpose of this invention is to provide a filter to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A filter includes: a body defining a first surface; and at least one coil group defining a second surface, the at least one coil group being disposed on the body, the second surface being parallel to the first surface, the at least one coil group including a first coil and a second coil stacked together, the two ends of the first coil being bent to extend into a first pin, the two ends of the second coil being bent to extend into a second pin, and the first pin and the second pin extending in the same direction, and an insulator being disposed between the first coil and the second coil.

[0010] The first coil and the second coil are flat coils.

[0011] The exterior of the main body is provided with at least one heat sink.

[0012] When there are two or more coil groups, the coil groups are arranged at the same spacing.

[0013] The main body comprises a seat and a cover.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, at least one coil group can be arranged in parallel on the body, and the at least one coil group includes a first coil and a second coil that are superimposed on each other, so as to reduce the overall height and meet the requirements of thinness. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the filter in this embodiment.

[0017] Figure 2 This is an exploded view of the filter in this embodiment.

[0018] Figure 3 This is a schematic diagram of the coil assembly and insulator in this embodiment.

[0019] Figure 4 This is a schematic diagram of the three coil groups in this embodiment.

[0020] Figure 5 This is a schematic diagram showing that the body has heat sinks on the outside.

[0021] Figure 6 This is a front view of the body in this embodiment, where a heat sink is located on the outside.

[0022] Figure 7 This is a side view of the filter in this embodiment.

[0023] Figure 8 This is a schematic diagram of the filter being mounted on the circuit board in this embodiment.

[0024] Figure 9 This is a front view of an existing filter.

[0025] Figure 10 This is a side view of an existing filter.

[0026] Figure 11 This is a schematic diagram of an existing filter installed on a circuit board.

[0027] Figure 12 The graph shows the curves of the existing filter and the filter in this embodiment.

[0028] Figure Labels

[0029] 1: Body, 10: First side, 11: Base, 12: Cover, 13: Heat sink, 2: Coil group, 20: Second side, 21: First coil, 211: First pin, 22: Second coil, 221: Second pin, 23: Insulator, 3: Body, 30: First side, 4: Coil group, 40: Second side, 41: First coil, 42: Second coil, 5: Circuit board, 50: Circuit board, H1: Height, H2: Height, A1: Existing filter, A2: Filter. Detailed Implementation

[0030] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0031] Please see Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a filter, which includes:

[0032] A body 1, which defines a first face 10 (shown in...) Figure 7 The main body 1 can be assembled or formed into a single piece by hot or cold pressing iron powder, depending on the design requirements and application scenario. When the main body 1 is assembled, it can be disassembled into a base 11 and a cover 12. The base 11 serves as a support, used to support and fix other components. The cover 12 can be installed on the base 11 to enclose the filter, providing electromagnetic shielding and mechanical protection, protecting other internal components from physical damage and environmental factors. The main body 1 can also be designed with a heat dissipation function to improve the heat dissipation performance of the filter; that is, the exterior of the main body 1 can be provided with at least one heat sink 13 (illustrated in...). Figure 5 and Figure 6 The at least one heat sink 13 enhances heat dissipation efficiency, ensuring the filter remains stable during high-power or high-frequency operation and preventing overheating from affecting performance or lifespan. The modular design offers advantages such as ease of maintenance and replacement; damaged parts can be replaced individually without replacing the entire unit, and different covers 12 can be used to adjust electromagnetic shielding or heat dissipation as needed. The integrated design means the main body 1 cannot be disassembled. The advantages of an integrated design include a compact structure, reduced mechanical loosening or environmental impact, and improved reliability.

[0033] The at least one coil group 2 defines a second surface 20, is disposed on the body 1, and the second surface 20 is parallel to the first surface 10. The at least one coil group 2 includes a first coil 21 and a second coil 22 that are stacked together. The two ends of the first coil 21 are bent to extend into a first lead 211, and the two ends of the second coil 22 are bent to extend into a second lead 221. The first lead 211 and the second lead 221 extend in the same direction. An insulator 23 is provided between the first coil 21 and the second coil 22. The first coil 21 and the second coil 22 can be flat coils. When there are two or more coil groups 2, they are arranged at the same spacing. The number of coil groups 2 can be as follows: Figure 1 The two shown contain two first coils 21 and two second coils 22, or as follows: Figure 4 The three shown include three first coils 21 and three second coils 22, but are not limited to this.

[0034] When two flat coils are stacked, the insulator 23 between the two flat coils is commonly chosen from the following materials: plastic materials, such as polyvinyl chloride (PVC) or polyethylene (PE), or rubber, or ceramic or glass.

[0035] In the specific implementation of this case, the body 1 is manufactured by pressing magnetic materials, such as ferrite or metal alloys (such as Fe-Si alloys, Fe-Ni alloys, etc.). If ferrite is used for the body 1, high-temperature sintering is required to improve magnetic properties and mechanical strength. If metal alloy is used for the body 1, low-temperature sintering or resin bonding molding may be used, and metal electrodes may be fabricated on the body 1.

[0036] The fabrication of at least one coil group 2: Flat copper wires are cut according to design dimensions using precision stamping or laser cutting techniques to form the first coil 21 and the second coil 22. The surface of the second coil 22 can be coated with an insulator 23 (such as a PI film or electroplated insulating layer). The first coil 21 is stacked on top of the second coil 22, with the two ends of the first coil 21 bent to extend into first leads 211, and the two ends of the second coil 22 bent to extend into second leads 221. The first coil 21 and the second coil 22 are placed inside the body 1, and the first leads 211 of the first coil 21 and the second leads 221 of the second coil 22 are soldered to the metal electrodes of the body 1 to ensure a stable conductive connection.

[0037] Please see Figure 8As shown, since the coil group 2 of the filter in this embodiment is arranged parallel to the body 1, the filter in this embodiment is mounted on the circuit board 5, and its height H2 is relatively low. Please refer to... Figure 10 and Figure 11 As shown, conversely, since the coil group 4 of the existing filter is vertically mounted on the body 3, the height H1 of the existing filter is relatively high when it is mounted on the circuit board 50. In comparison, the filter of this embodiment has at least one coil group 2 that can be mounted parallel to the body 1, and the at least one coil group 2 includes a first coil 21 and a second coil 22 that are stacked together, thereby reducing the overall height and meeting the requirements for thinness.

[0038]

[0039] Please refer to Table 1. The first sample is an existing filter, and the second sample is the filter of this embodiment. Table 1 compares the performance of the two filters at the same size. The results show that the first sample has a higher saturation current, indicating that it has a higher load capacity and can handle larger loads, thereby improving the reliability of the filter. The higher saturation current helps prevent overheating or damage caused by excessive current, making the filter more stable and reliable, and able to operate for extended periods under more extreme conditions without performance degradation.

[0040]

[0041] Please refer to Table 2, which contains test data for existing filters. The higher the bias voltage, the more unstable the average inductance value becomes.

[0042]

[0043] Please refer to Table 3, which contains the test data for the filter in this embodiment. The higher the bias voltage, the more stable the average inductance value remains, without degradation.

[0044] Please see Figure 12 As shown, curve A1 represents the existing filter, where the higher the bias voltage, the more unstable the average inductance value becomes. Curve A2 represents the filter in this embodiment, where the higher the bias voltage, the more stable the average inductance value remains, without degradation.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A filter, characterized in that: Include: An ontology, wherein the ontology defines a first face; and At least one coil group, the at least one coil group defining a second surface, the at least one coil group being disposed inside the body, and the second surface being parallel to the first surface, the at least one coil group comprising a first coil and a second coil superimposed on each other, the two ends of the first coil being bent to extend into a first lead, the two ends of the second coil being bent to extend into a second lead, and the first lead and the second lead extending in the same direction, and an insulator being provided between the first coil and the second coil.

2. The filter according to claim 1, characterized in that: The first coil and the second coil are flat coils.

3. A filter according to claim 1, characterized in that: The exterior of the body is provided with at least one heat sink.

4. A filter according to claim 1, characterized in that: When there are two or more coil groups, the coil groups are arranged at the same spacing.

5. A filter according to claim 1, characterized in that: The main body includes a base and a cover. The at least one coil group is disposed on the base, and the cover is disposed on the base and covers the at least one coil group.

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