Buckle type common mode inductor

Abstract

The invention provides a buckle type common mode inductor which comprises a magnetic core, a framework and a winding, the framework comprises a sheath and a support, the sheath comprises an annular cylinder and a cover plate, and the cover plate is used for covering a port of the annular cylinder to form an annular containing cavity for containing the magnetic core; a partition plate is clamped in an inner hole of the annular cylinder to divide the annular cylinder into a first winding part and a second winding part, and the winding comprises a first coil wound on the first winding part and a second coil wound on the second winding part; a mounting plate is arranged at the bottom end of the support, two limiting columns are arranged at the top end of the support, the two limiting columns are arranged in parallel and at an interval, the two limiting columns extend in the vertical direction, and the protective sleeve is clamped between the two limiting columns; a plurality of wire hanging notches are formed in the side edge of the mounting plate, and wire ends of the first coil and wire ends of the second coil are clamped into the wire hanging notches in a one-to-one correspondence mode. The connecting structure has the advantages of being simple in structure, convenient to install and high in reliability, the cost is effectively reduced, and connection is firmer and more convenient.

Description

Technical Field

[0001] This invention relates to the technical field of common mode inductors, and in particular to a snap-fit ​​common mode inductor. Background Technology

[0002] A common-mode inductor, also called a common-mode choke, is commonly used in computer switching power supplies to filter common-mode electromagnetic interference signals. Essentially, it's a bidirectional filter; it filters out common-mode electromagnetic interference on signal lines while simultaneously suppressing its own electromagnetic interference emissions to avoid affecting the normal operation of other electronic devices in the same electromagnetic environment. The structure of a common-mode inductor generally consists of a frame, coil, sheath, packaging material, and a magnetic core or iron core.

[0003] In existing technologies, the components of common-mode inductors are mainly fixed and connected by dispensing adhesive, which is relatively cumbersome in processing and installation. Dispensing adhesive also introduces many instabilities and significantly affects the reliability of the finished common-mode inductor. Furthermore, the dispensing process requires subsequent baking, which increases costs. Therefore, it is urgent to solve these problems. Summary of the Invention

[0004] To address the aforementioned problems, the present invention achieves the above objectives through the following technical solution: a snap-fit ​​common-mode inductor, comprising a magnetic core, a frame, and a winding, wherein the frame comprises a sheath and a support, the sheath comprises an annular cylinder and a cover plate, the cover plate being used to cover the port of the annular cylinder to form an annular cavity for accommodating the magnetic core; a partition plate is snapped into the inner hole of the annular cylinder to divide the annular cylinder into a first winding portion and a second winding portion, and the winding comprises a first coil wound on the first winding portion and a second coil wound on the second winding portion; The bracket has a mounting plate at its bottom and two limiting posts at its top. The two limiting posts are parallel and spaced apart and extend vertically. The sheath is snapped between the two limiting posts. The mounting plate has several wire hanging slots on its side. The wire ends of the first coil and the second coil are snapped into the wire hanging slots one by one.

[0005] Furthermore, the inner wall of the annular cylinder is provided with two slots, which are symmetrically arranged relative to the axis of the annular cylinder; the top and bottom of the partition plate are respectively engaged in the slots. This allows the partition plate to be engaged in the inner hole of the annular cylinder, making installation convenient.

[0006] Furthermore, each end of the partition has a protruding locking block, and the limiting post has a locking hole for the locking blocks to engage. This ensures that all four sides of the partition are connected, guaranteeing a secure connection.

[0007] Furthermore, guide grooves are respectively formed on the opposite sidewalls of the two limiting posts, and the guide grooves are connected to the locking holes. The guide grooves facilitate the locking block's insertion into the locking holes, making installation easier.

[0008] Furthermore, the edges of the card block are chamfered or rounded. This facilitates the card block's insertion into the card hole and makes installation easier.

[0009] Furthermore, the mounting plate is provided with a limiting groove, which is located between the two limiting posts; the side wall of the annular cylinder is provided with a positioning block, which is engaged in the limiting groove. This ensures that the annular cylinder is installed in the correct position, facilitates installation, and makes the connection more secure.

[0010] Furthermore, there are two positioning blocks, which are symmetrically arranged with respect to the axis of the annular cylinder.

[0011] Furthermore, the guide groove extends vertically, and the limiting groove extends horizontally.

[0012] Furthermore, the magnetic core is made of nanocrystalline material.

[0013] Furthermore, the hanging slot is shaped like a "7". This effectively restricts the wire end, ensuring it is securely fastened to the mounting plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: by snapping the partition plate into the inner hole of the annular cylinder, snapping the sheath between the two limiting posts, and snapping the coil wire ends one by one into the hanging slot, the connection of each component is a snap-fit ​​type, eliminating the need for glue application for connection and fixation. This makes processing and installation relatively convenient and quick. Simply snapping the corresponding components together achieves the connection, simplifying the assembly process, reducing labor costs and time, and thus effectively solving the technical problems in this field. Moreover, the structure is relatively simple, simplifying redundant structures and saving glue application and baking costs, effectively reducing costs. It also avoids the instability factors present in glue application methods, improving the reliability of the common mode inductor product. Overall, the present invention has the advantages of simple structure, convenient installation, and high reliability, effectively reducing costs and making the connection more reliable and convenient. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the sheath structure in this invention; Figure 4 This is a schematic diagram of the support structure in this invention.

[0016] The reference numerals in the attached drawings are explained as follows: 1-Magnetic core; 2-Sheath; 21-Annular cylinder; 211-First winding section; 212-Second winding section; 213-Slot; 214-Positioning block; 22-Cover plate; 23-Annular cavity; 24-Stop block; 3-Bracket; 31-Mounting plate; 32-Limiting post; 321-Holding hole; 322-Guide groove; 33-Hanging slot; 34-Limiting groove; 4-Partition plate; 41-Slot; 5-First coil; 6-Second coil. Detailed Implementation

[0017] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. The embodiments in this specification are described in a progressive manner; similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on its differences from other embodiments. Furthermore, the division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of this application. The embodiments can be combined with and referenced by each other without contradiction.

[0018] It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0020] like Figures 1 to 4 As shown, a snap-fit ​​common mode inductor includes a magnetic core 1, a frame, and windings. The frame includes a sheath 2 and a support 3. The sheath 2 includes an annular cylinder 21 and a cover plate 22. The cover plate 22 is used to cover the port of the annular cylinder 21 to form an annular cavity 23 for accommodating the magnetic core 1. A partition 4 is snapped into the inner hole of the annular cylinder 21 to divide the annular cylinder 21 into a first winding section 211 and a second winding section 212. The windings include a first coil 5 wound on the first winding section 211 and a second coil 6 wound on the second winding section 212. The bracket 3 has a mounting plate 31 at its bottom and two limiting posts 32 at its top. The two limiting posts 32 are parallel and spaced apart, extending vertically. The sheath 2 is snapped between the two limiting posts 32. The mounting plate 31 has several wire hanging slots 33 on its side, and the wire ends of the first coil 5 and the second coil 6 are snapped into the wire hanging slots 33 one by one. Preferably, the cross-section of the first coil 5 and the second coil 6 is circular, and the winding process can be semi-automated, compatible with round wires of different specifications, and can be wound with single or multiple wires in parallel, increasing the heat dissipation area and meeting the requirements of high current operation. The two limiting posts 32 not only provide additional support and fixation for the partition 4, but also constitute a frame structure on the mounting plate 31, providing a positioning reference for the subsequent installation of the annular cylinder.

[0021] The inner wall of the annular cylinder 21 has two protruding slots 213, which are symmetrically arranged relative to the axis of the annular cylinder 21. The top and bottom of the partition plate 4 are respectively engaged in the slots 213. Specifically, the annular cylinder 21, as the main structure, provides a precise positioning reference for the partition plate 4 through the slots 213, achieving the first layer of fixation of the partition plate 4 inside the annular cylinder 21. The top and bottom of the partition plate 4 are simultaneously engaged in the slots, forming a bidirectional engagement, which not only effectively prevents the partition plate 4 from shaking and displacing inside the annular cylinder 21, but also restricts its rotational freedom. The symmetrical arrangement of the slots 213 ensures the balanced installation of the partition plate 4 at the center position of the annular cylinder 21, which helps to evenly distribute stress, simplifies the assembly process, avoids installation difficulties caused by incorrect orientation, and also achieves the equal distribution of the first winding part 211 and the second winding part 212 by the partition plate 4. It can provide sufficient fixing force to ensure that the partition 4 can maintain its preset position in the working state, thus ensuring the stability of electrical performance.

[0022] Both ends of the partition 4 are provided with protruding locking blocks 41, and the limiting posts 32 are provided with locking holes 321 for the locking blocks 41 to engage. The opposite sidewalls of the two limiting posts 32 are provided with guide grooves 322, which connect to the locking holes 321. The edges of the locking blocks 41 are chamfered or rounded; the edges of the locking grooves 213 are also chamfered or rounded. Specifically, the engagement of the locking holes 321 and the locking blocks 41 effectively enhances the lateral stability of the partition 4 and tightly connects it to the limiting posts 32, achieving a second layer of fixation for the partition 4. During actual installation and snap-fitting, the chamfered or rounded corners reduce frictional resistance during assembly, allowing the snap-fit ​​block 41 to smoothly enter the guide groove 322 and the snap-fit ​​hole 41. Simply slide the snap-fit ​​block 41 to the position aligned with the snap-fit ​​hole 321, and a slight push causes the limiting post 32 to elastically deform, allowing the snap-fit ​​block 41 to precisely engage in the snap-fit ​​hole 321, effectively preventing jamming. Furthermore, the guide groove 322 greatly simplifies the alignment process of the snap-fit ​​block 41, reducing the difficulty and time of manual operation and improving assembly efficiency. It also ensures that the snap-fit ​​block 41 can only enter along a preset path, avoiding assembly failure or component damage due to incorrect angle or positional deviation. It also prevents wear or deformation of the edges of the snap-fit ​​block 41 or the snap-fit ​​hole 321 during forced assembly, thus providing some protection for the components.

[0023] The mounting plate 31 is provided with a limiting groove 34, which is located between two limiting posts 32. A positioning block 214 protrudes from the side wall of the annular cylinder 21 and engages within the limiting groove 34. Two positioning blocks 214 are provided, symmetrically arranged relative to the axis of the annular cylinder 21. A guide groove 322 extends vertically, and the limiting groove 34 extends horizontally. Specifically, the mounting plate 31 serves as the base or integrated platform for the entire common-mode inductor. Through the cooperation of the limiting groove 34 and the positioning blocks 214, precise connection of the annular cylinder 21 can be achieved. The two positioning blocks 214 ensure the balance and stability of the connection between the annular cylinder 21 and the mounting plate 31, allowing the annular cylinder 21 to be installed in either direction relative to the mounting plate 31, making installation convenient and quick.

[0024] The magnetic core 1 is made of nanocrystalline material. Nanocrystalline material is an advanced soft magnetic material with extremely high permeability, saturation magnetic induction intensity and extremely low loss, especially performing well in high-frequency applications, significantly improving the performance, efficiency and miniaturization potential of common-mode inductors.

[0025] The hanging slot 33 is shaped like a "7". This effectively locks or restricts the movement of the wire end after it enters the hanging slot 33, preventing it from being easily pulled out or accidentally falling off due to vibration or gravity. The wire end needs to be moved along the opening direction of the hanging slot 33 to be removed, which greatly enhances the reliability of the wire connection.

[0026] Preferably, both the end face of the annular cylinder 21 and the end face of the cover plate 22 are provided with protruding blocks 24. The blocks 24 and the partition plate 4 are arranged on the same plane to increase the area of ​​the partition plate 4 and ensure the partitioning effect, which can meet the withstand voltage of the winding above 2000V. The cover plate 22 is annular, and the annular cylinder 21 and the cover plate 22 are fixed by an interference fit. A threaded structure or a snap-fit ​​structure can also be used. The protruding blocks 24 on the cover plate 22 can also facilitate manual gripping and facilitate the installation of the cover plate 22.

[0027] In actual installation, first place the magnetic core 1 inside the annular cavity 23, then cover the annular cylinder 21 with the cover plate 22 to make the annular cavity 23 relatively closed. Next, wind the winding on the annular cylinder 21, and insert the partition 4 along the slot 213 to separate the first coil 5 and the second coil 6 into the first winding part 211 and the second winding part 212. Finally, insert the sheath 2 and the partition 4 into the bracket 3, and insert the locking block 41 into the locking hole 321. The positioning block 214 at the lower end is inserted into the limiting groove 34. At the same time, tidy up the wire ends and insert them into the hanging slots 33 to complete the installation of the entire common mode inductor without the need for glue application or baking.

[0028] In summary, the technical solution of this invention can fully and effectively achieve the above-mentioned objectives. Furthermore, the structure and functional principles of this invention have been fully verified in the embodiments, achieving the expected effects and objectives. Without departing from the principles and essence of this invention, various changes or modifications can be made to the embodiments. Therefore, this invention includes all substitutions within the scope mentioned in the patent application claims, and any equivalent changes made within the scope of this patent application are within the scope of the patent application.

Claims

1. A snap-in common mode inductor comprising a magnetic core (1), a skeleton and a winding, characterized in that: The skeleton comprises a sheath (2) and a support (3), the sheath (2) comprises a ring-shaped cylinder (21) and a cover plate (22), the cover plate (22) is used for covering the port of the ring-shaped cylinder (21) to form a ring-shaped cavity (23) containing the magnetic core (1); the inner hole of the ring-shaped cylinder (21) is clamped with a partition plate (4) to separate the ring-shaped cylinder (21) into a first winding part (211) and a second winding part (212), the winding comprises a first coil (5) wound on the first winding part (211) and a second coil (6) wound on the second winding part (212); The bottom end of the support (3) is provided with a mounting plate (31), the top end of the support (3) is provided with two limiting columns (32), the two limiting columns (32) are parallel and spaced apart, and the two limiting columns (32) extend in the vertical direction, and the sheath (2) is clamped between the two limiting columns (32); a plurality of wire hanging notches (33) are formed in the side edge of the mounting plate (31), and the wire heads of the first coil (5) and the second coil (6) are clamped one by one in the wire hanging notches (33).

2. The snap-on common mode inductor of claim 1, wherein: The inner hole wall of the ring-shaped cylinder (21) is protrudingly provided with two clamping grooves (213), and the two clamping grooves (213) are symmetrically arranged with respect to the axis of the ring-shaped cylinder (21); the top and bottom of the partition plate (4) are clamped in the clamping grooves (213), respectively.

3. The snap-on common mode inductor of claim 1, wherein: The two ends of the partition plate (4) are respectively protrudingly provided with clamping blocks (41), and the limiting columns (32) are provided with clamping holes (321) for clamping cooperation of the clamping blocks (41).

4. The snap-on common mode inductor of claim 3, wherein: The opposite side walls of the two limiting columns (32) are respectively provided with guide grooves (322), and the guide grooves (322) are communicated with the clamping holes (321).

5. The snap-on common mode inductor of claim 3, wherein: The edge of the clamping block (41) is provided with a chamfer or a rounded corner.

6. The snap-in common mode inductor of claim 4, wherein: The mounting plate (31) is provided with a limiting groove (34), and the limiting groove (34) is arranged between the two limiting columns (32); the side wall of the ring-shaped cylinder (21) is protrudingly provided with a positioning block (214), and the positioning block (214) is clamped in the limiting groove (34).

7. The snap-on common mode inductor of claim 6, wherein: The positioning block (214) is provided with two, and the two positioning blocks (214) are symmetrically arranged with respect to the axis of the ring-shaped cylinder (21).

8. The snap-in common mode inductor of claim 6, wherein: The guide groove (322) extends in the vertical direction, and the limiting groove (34) extends in the horizontal direction.

9. The snap-in common mode inductor of claim 1, wherein: The magnetic core (1) is made of nanocrystalline material.

10. The snap-in common mode inductor of claim 1, wherein: The wire hanging notch (33) is in the shape of "7".

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