A vertical common mode filter

Abstract

This utility model relates to the field of electronic component technology, and in particular to a vertical common-mode filter. Through innovative structural design, this vertical common-mode filter abandons the traditional through-hole structure, adopting a combination of a base, coil, and housing. The mounting slot on the base ensures stable coil installation, while the design of the pin socket and through holes facilitates lead connection and fixation, improving the reliability of electrical connections. The snap-fit ​​structure between the housing and the base not only facilitates assembly but also effectively protects internal components, extending the filter's lifespan. Furthermore, it allows for easy robotic arm handling of the housing, and combined with a wound lead connection method, enables SMT production assembly, significantly improving production efficiency. Overall, this vertical common-mode filter has advantages such as compact structure, stable performance, and good heat dissipation, meeting the stringent requirements of modern electronic equipment for common-mode filters.

Description

Technical Field

[0001] This utility model relates to the field of electronic components technology, and in particular to a vertical common-mode filter. Background Technology

[0002] A filter is a device used to eliminate interference and noise, filtering the input or output to obtain pure direct current. Its function is to obtain a specific frequency or eliminate a specific frequency. Currently, vertical common-mode filters on the market are made by winding copper wire around a ferrite core and then bonding it to a base made of bakelite board. The copper wire leads pass through the base. Therefore, existing vertical common-mode filters can only be assembled on the board using a through-hole method, resulting in low production efficiency. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a vertical common-mode filter, including a base, a coil, and a housing. The base is provided with a mounting groove for positioning the coil. Pin sockets are provided on opposite sides of the base. Four through holes are formed on the base between the mounting groove and the pin sockets. The lead end of the coil can pass through the through holes and be wound around the pin socket. The other opposite sides of the base are provided with slots. The housing is fitted onto the base, and the inner wall of the housing is provided with tenons that can be snapped and fixed to the slots.

[0004] In some possible embodiments, the pin holder is cylindrical and integrally formed with the base.

[0005] In some possible embodiments, a partition plate is provided between the two through holes on the same side of the base.

[0006] In some possible embodiments, air holes are provided on opposite sides of the outer casing, and the air holes are rectangular in shape and arranged vertically.

[0007] In some possible embodiments, the lower end of the housing is provided with a relief groove, and the tenon is semi-cylindrical and protrudes inward from the relief groove.

[0008] In some possible embodiments, the depth of the clearance groove is adapted to the thickness of the base, and after installation, the lower end face of the base is flush with the lower end face of the housing.

[0009] Compared to existing technologies, the advantages of this invention are as follows: This vertical common-mode filter, through its innovative structural design, abandons the traditional through-hole structure and adopts a combination of a base, coil, and housing. The mounting slot on the base ensures stable coil installation, while the design of the pin socket and through-holes facilitates lead wire connection and fixation, improving the reliability of electrical connections. The snap-fit ​​structure between the housing and the base not only facilitates assembly but also effectively protects internal components, extending the filter's lifespan. Furthermore, it allows for easy robotic arm gripping of the housing, and combined with the wound lead wire connection method, enables SMT production assembly, significantly improving production efficiency. Overall, this vertical common-mode filter has advantages such as compact structure, stable performance, and good heat dissipation, meeting the stringent requirements of modern electronic equipment for common-mode filters. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 A three-dimensional assembly drawing from one perspective provided for an embodiment of this utility model;

[0012] Figure 2 A three-dimensional assembly drawing from a second perspective provided for an embodiment of this utility model;

[0013] Figure 3 This is a cross-sectional structural diagram provided for an embodiment of the present utility model.

[0014] Reference numerals: base 1, mounting slot 11, pin socket 12, through hole 13, isolation plate 14, card slot 15, coil 2, lead end 21, outer shell 3, latch 31, air hole 32, clearance groove 33. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1 to 3The illustrated vertical common-mode filter includes a base 1, a coil 2, and a housing 3. The base 1 has a mounting groove 11 for positioning the coil 2, ensuring stable mounting of the coil 2 on the base 1. Pin holders 12 are provided on opposite sides of the base 1 for connecting and securing leads. Four through holes 13 are formed on the base 1 between the mounting groove 11 and the pin holders 12. The lead ends 21 of the coil 2 can pass through the through holes 13 and be wound around the pin holders 12, allowing the lead ends 21 to protrude from the lower end face of the base 1 as an SMT mounting surface. This SMT mounting surface, after tinning, can be directly assembled on the PCB using SMT technology. This lead connection method is not only simple to operate and provides a strong and reliable connection, effectively reducing problems such as cold solder joints or poor contact, but also meets the requirements of SMT assembly operations, enabling mass production SMT assembly and greatly improving production assembly efficiency. The base 1 has slots 15 on both sides adjacent to the pin seat 12. The outer shell 3 is mounted on the base 1, and the inner wall of the outer shell 3 has tenons 31 that can be snapped into the slots 15. The cooperation between the tenons 31 and the slots 15 allows the outer shell 3 to be tightly fixed on the base 1, forming a whole. This not only avoids the problem of characteristic attenuation of the coil 2 due to external forces, but also improves the insulation ability of the coil 2 against external high voltages.

[0017] In some possible embodiments, the pin holder 12 is cylindrical and integrally formed with the base 1, which ensures that the pin holder 12 and the base 1 have high structural strength and good high voltage resistance.

[0018] In some possible embodiments, an isolation plate 14 is provided between two through holes 13 on the same side of the base 1. The isolation plate 14 can improve the insulation isolation capability and electromagnetic interference capability of two adjacent lead ends 21, improve the performance of the filter, ensure that it can work stably in the process of high frequency signal processing, and avoid high voltage causing filter abnormality.

[0019] In some possible embodiments, vents 32 are provided on opposite sides of the housing 3. The vents 32 are rectangular and arranged vertically to facilitate heat dissipation during filter operation and ensure stable operation. The design of the vents 32 ensures good heat dissipation without having too much negative impact on the electromagnetic shielding performance of the filter.

[0020] In some possible embodiments, the lower end of the housing 3 is provided with a relief groove 33, and the tenon 31 is semi-cylindrical and protrudes inward from the relief groove 33, making the connection between the housing 3 and the base 1 tighter and preventing loosening. The overall integrity after installation is better, which can better resist external mechanical stress, improve the reliability of the filter, and the outer surface of the vertical common-mode filter is flat without protrusions.

[0021] In some possible embodiments, the depth of the clearance slot 33 is adapted to the thickness of the base 1. After installation, the lower end face of the base 1 is flush with the lower end face of the housing 3, ensuring the flatness and aesthetics of the overall appearance of the filter, and facilitating its installation and layout in electronic devices.

[0022] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A vertical common-mode filter, characterized in that, The device includes a base (1), a coil (2), and a housing (3). The base (1) is provided with a mounting groove (11) for positioning the coil (2). Pin seats (12) are provided on opposite sides of the base (1). Four through holes (13) are formed on the base (1) between the mounting groove (11) and the pin seats (12). The lead end (21) of the coil (2) can pass through the through holes (13) and be wound around the pin seats (12). The base (1) is provided with slots (15) on opposite sides. The housing (3) is fitted onto the base (1). The inner wall of the housing (3) is provided with tenons (31) that can be snapped onto the slots (15).

2. A vertical common-mode filter according to claim 1, characterized in that, The pin holder (12) is cylindrical and integrally formed with the base (1).

3. A vertical common-mode filter according to claim 1, characterized in that, An isolation plate (14) is provided between the two through holes (13) on the same side of the base (1).

4. A vertical common-mode filter according to claim 1, characterized in that, Air holes (32) are provided on both opposite sides of the outer shell (3), and the air holes (32) are rectangular in shape arranged vertically.

5. A vertical common-mode filter according to claim 1, characterized in that, The lower end of the outer shell (3) is provided with a relief groove (33), and the tenon (31) is semi-cylindrical and protrudes inward from the relief groove (33).

6. A vertical common-mode filter according to claim 5, characterized in that, The depth of the relief groove (33) is adapted to the thickness of the base (1), and after installation, the lower end face of the base (1) is flush with the lower end face of the outer shell (3).

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