Flat common mode inductor
By introducing a sliding conductive slider and an insulating auger blade design into the common-mode inductor, the problems of fixed inductance value and wear are solved, enabling flexible adjustment of inductance value and reducing wear, thus improving the stability of electrical connection.
Patent Information
- Application Number
- CN202422973952.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The inductance value of existing common mode inductors is fixed and cannot be effectively adjusted in actual environments. Furthermore, there is a wear problem between the conductive slider and the coil.
A flat common-mode inductor is designed. By installing a sliding conductive slider and an insulating auger blade on the mold frame, the inductance value can be adjusted by utilizing the sliding relationship between the spiral assembly groove and the conductive slider. Wear is reduced by using an insulating spring and a relaxation switch.
This allows for flexible adjustment of the inductance value, reduces wear between the conductive slider and the coil, and improves the stability and reliability of the electrical connection.
Smart Images
Figure CN223566408U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of common mode inductor, specifically to a flat common mode inductor. BACKGROUND
[0002] The common mode inductor is also called common mode choke, and is a common mode interference suppression device with a ferrite core. It is formed by two or four coils with the same size and number of turns symmetrically wound on the same ferrite ring core, forming a four-terminal device.
[0003] In the prior art, the inductance value of the common mode inductor is usually fixed, but in some cases, the inductance can be adjusted by adjusting the design parameters, such as changing the number of turns, replacing different magnetic core materials, adjusting the size of the magnetic core or designing the magnetic bridge, but these are changes in attribute parameters and cannot be effectively adjusted in actual environment. UTILITY MODEL CONTENT
[0004] The utility model provides a flat common mode inductor, which can effectively adjust the inductance value and reduce the wear between the conductive sliding block and the coil.
[0005] In order to achieve the above purpose, the utility model provides the following technical scheme:
[0006] A flat common mode inductor comprises:
[0007] A mold frame is provided with a magnetic core, and two coils are symmetrically installed on the magnetic core. The coils are made of flat copper wire and are spirally wound. The coils have a spiral gap. Two insulating dragon leaves are fixedly installed on the spiral outer wall of the coil. The two insulating dragon leaves are synchronously arranged along the spiral direction of the coil, and a spiral assembly groove is formed between the coil and the two insulating dragon leaves. A conductive sliding block is installed on the mold frame and can slide along the axial direction of the coil. One end of the conductive sliding block is in sliding fit with the spiral assembly groove. The conductive sliding block serves as a variable pin of the coil, and one end of the coil serves as a fixed pin.
[0008] Optionally, an assembly seat is installed on the mold frame and can slide along the axial direction of the coil. A conductive column is installed on the assembly seat and can slide along the radial direction of the coil. One end of the conductive column is fixedly connected with the conductive sliding block, and the other end of the conductive column is fixedly connected with a terminal. An insulating spring is sleeved on the outer wall of the conductive column. Both ends of the insulating spring are fixedly connected with the outer wall of the conductive sliding block and the assembly seat. A second pin is fixedly installed on the outer wall of the mold frame. The terminal is electrically connected with the second pin through a long flexible wire.
[0009] Optionally, the shell is detachably mounted on the mold frame, an assembly hole is formed in the outer wall of the shell, a limiting block is fixedly mounted on the inner wall of the assembly hole, a shift fork is slidably mounted on the limiting block in the radial direction of the coil, a limiting groove is formed in the shift fork, the shift fork is embedded between the assembly seat and the terminal through the limiting groove, the outer wall of the conductive column is in sliding relationship with the limiting groove, the assembly seat and the conductive column slide synchronously, and a slack switch is designed on the shell to make the conductive column away from the coil.
[0010] Optionally, the slack switch comprises a wedge block which is slidably mounted in the assembly hole in a damping mode, and one end of the wedge block is in inclined surface transmission cooperation with one end of the shift fork; when the wedge block is displaced into the mold frame, the shift fork can be made away from the coil.
[0011] Optionally, a first pin is mounted on the outer wall of the mold frame, a conductive ring is fixedly mounted on the first pin, and the one end of the coil is overlapped with the outer wall of the conductive ring; the rotation of the coil does not interfere with the electrical connection between the coil and the first pin.
[0012] Optionally, a guide rail is fixedly mounted on the outer wall of the shell, a guide block is limitingly and slidably mounted on the outer wall of the guide rail, and the guide block is fixedly connected with the assembly seat; the track direction of the guide rail is parallel to the axial direction of the coil.
[0013] Optionally, an insulating rotating shaft is fixedly mounted on the outer wall of the insulating leaf, and a knob is fixedly mounted on the end of the insulating rotating shaft.
[0014] Optionally, the outer wall of the conductive sliding block is designed as an arc surface at the abutting position of the coil.
[0015] Optionally, a blocking beam is designed on the mold frame, the two coils are designed on the two sides of the blocking beam respectively, the magnetic core is fixedly mounted on the blocking beam, and the magnetic core is in U-shaped structure.
[0016] The utility model provides a kind of flat type common mode inductor, and the beneficial effects reached are as follows: by the cooperation between two insulating leaves, coil and conductive sliding block, spiral assembly groove is formed between two insulating leaves and coil, and the conductive sliding block that can slide along the axial direction of the coil is matched, and sliding relationship is formed between the conductive sliding block and the spiral assembly groove, so that the conductive sliding block can be contacted with any point on the spiral outer wall by rotating the coil, thus, when the inductance needs to be adjusted, the contact position between variable pin and the spiral outer wall of the coil can be adjusted by rotating the coil, so as to change inductance value. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;
[0018] Figure 2 It is the right view structure schematic diagram of the utility model diagram.
[0019] Figure 3 It is the structure schematic view of the utility model along the A-A place section in the drawing;
[0020] Figure 4 It is the inside three-dimensional structure schematic view of the utility model figure;
[0021] Figure 5 It is the three-dimensional structure schematic view of the coil, insulating leaf and conductive ring in the utility model;
[0022] Figure 6 It is the three-dimensional structure schematic view of the slack switch and conductive sliding block in the utility model.
[0023] In the drawing: 1, die carrier;2, magnetic core;3, coil;4, insulating leaf;5, conductive ring;6, limit block;7, insulating rotating shaft;8, conductive sliding block;11, shell;12, conductive column;13, assembly seat;14, wedge;15, yoke;16, terminal;17, guide block;18, guide rail;20, first pin;21, second pin. DETAILED DESCRIPTION
[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0025] Please refer to Figures 1 to 6 The utility model provides a kind of technical scheme: a flat common mode inductor, comprising:
[0026] Die carrier 1 is assembled with magnetic core 2 on die carrier 1, two coils 3 are symmetrically installed on magnetic core 2;Coil 3 is made of flat copper wire spiral winding, and coil 3 has spiral gap;Two insulating leaves 4 are further fixedly installed on the spiral outer wall of coil 3, two insulating leaves 4 are configured synchronously along the spiral direction of coil 3, and spiral assembly groove is formed between coil 3 and two insulating leaves 4;Die carrier 1 is further provided with conductive sliding block 8 that can slide along the axis of coil 3, one end of conductive sliding block 8 is slidably matched with spiral assembly groove, and conductive sliding block 8 is used as the variable pin of coil 3, and one end of coil 3 is fixed pin.
[0027] In the utility model, two insulating dragon leaves 4 are spirally arranged on the outer wall of the coil 3, the two insulating dragon leaves 4 can be attached to the outer wall of the coil 3, the insulating dragon leaves 4 are used as insulating partition, the mutual contact between the spiral outer walls of the coil 3 is avoided, simultaneously, the two insulating dragon leaves 4 and the coil 3 form a spiral assembly groove, the conductive slider 8 that can slide along the axial direction of the coil 3 is matched, and the conductive slider 8 and the spiral assembly groove form a sliding relationship, rotating the coil 3 can make the conductive slider 8 contact and conduct electricity with any point of the spiral outer wall thereof, therefore, when the inductance size needs to be adjusted, the contact position of the variable pin and the spiral outer wall of the coil 3 can be adjusted by rotating the coil 3, so that the inductance value is changed.
[0028] In a more preferred embodiment, the assembly seat 13 is slidably installed on the mold frame 1 along the axial direction of the coil 3, the conductive column 12 is slidably installed on the assembly seat 13 along the radial direction of the coil 3, one end of the conductive column 12 is fixedly connected with the conductive slider 8, the other end of the conductive column 12 is fixedly connected with the wiring terminal 16, the outer wall of the conductive column 12 is sleeved with the insulating spring, the two ends of the insulating spring are fixedly connected with the outer wall of the conductive slider 8 and the assembly seat 13 respectively, the second pin 21 is fixedly installed on the outer wall of the mold frame 1, the wiring terminal 16 is electrically connected with the second pin 21 through the long flexible wire, please refer to Figures 3 to 6 In the embodiment, the insulating spring is designed, and the conductive slider 8 is in a certain compression state, so that the conductive slider 8 can better attach to the outer wall of the coil 3, secondly, the connection relationship formed by the conductive slider 8, the conductive column 12 and the wiring terminal 16 can make the conductive slider 8 form electrical connection with the second pin 21 through the long flexible wire, and further form the variable pin.
[0029] Further, the shell 11 is detachably installed on the mold frame 1, the assembly hole is formed in the outer wall of the shell 11, the limiting block 6 is fixedly installed on the inner wall of the assembly hole, the fork 15 is slidably installed on the limiting block 6 along the radial direction of the coil 3, the limiting groove is formed in the fork 15, the fork 15 is embeddedly installed between the assembly seat 13 and the wiring terminal 16 through the limiting groove, the outer wall of the conductive column 12 and the limiting groove are in sliding relationship, the assembly seat 13 and the conductive column 12 slide synchronously, the shell 11 is designed with the relaxation switch that makes the conductive column 12 away from the coil 3, please refer to Figures 3 to 6In the embodiment, the relationship between the inductance value and the position of the conductive slider 8 can be accurately obtained through experiments. However, in order to prevent frequent wear between the conductive slider 8 and the coil 3 and avoid affecting the stability of the electrical connection, the conductive column 12 and the coil 3 can be moved away from the coil 3 by the relaxation switch before adjusting the inductance value, so as to avoid wear between the conductive slider 8 and the coil 3. The outer wall of the conductive slider 8 can be in a relationship with the spiral assembly groove, so that when the coil 3 rotates, the wear between the conductive slider 8 and the coil 3 can be reduced, and the conductive slider 8 can be displaced to determine the inductance position. Then, the relaxation switch is reset to reestablish the electrical connection between the conductive slider 8 and the coil 3.
[0030] Specifically, when the fork 15 is displaced, the fork 15 can pull the conductive column 12 and the conductive slider 8 away from the coil 3 through the terminal 16. The energy accumulated by the insulating spring can reset the conductive slider 8 at a later time.
[0031] Further, the relaxation switch includes a damping wedge 14 slidingly installed in the assembly hole. One end of the wedge 14 is in a bevel transmission cooperation with one end of the fork 15. When the wedge 14 is displaced into the mold frame 1, the fork 15 can be moved away from the coil 3.
[0032] Further, the outer wall of the mold frame 1 is provided with a first pin 20. The first pin 20 is fixedly provided with a conductive ring 5. One end of the coil 3 is overlapped with the outer wall of the conductive ring 5. The rotation of the coil 3 does not interfere with the electrical connection between the coil 3 and the first pin 20.
[0033] Further, the outer wall of the shell 11 is fixedly provided with a guide rail 18. The outer wall of the guide rail 18 is limitingly and slidingly provided with a guide block 17. The guide block 17 is fixedly connected with the assembly seat 13. The track direction of the guide rail 18 is parallel to the axial direction of the coil 3. Please refer to Figure 6 In order to make the assembly seat 13 and the conductive slider 8 more smoothly displace, the cooperation between the guide rail 18 and the guide block 17 can be used to achieve this, and the limiting guide structure formed between the guide rail 18 and the guide block 17 is independent of the conductive slider 8, and the correlation between the conductive slider 8 and the guide block 17 is reduced, which can be maintained separately.
[0034] Please refer to Figure 5 and Figure 6 In order to better rotate the coil 3, the outer wall of the insulating leaf spring 4 is fixedly provided with an insulating rotating shaft 7. The end of the insulating rotating shaft 7 is fixedly provided with a knob. The outer wall of the conductive slider 8 at the abutting position of the coil 3 is designed as a curved surface, which can improve the stability of the electrical connection.
[0035] Further, the mold frame 1 is designed with a blocking beam, two coils 3 are designed on the two sides of the blocking beam respectively, the magnetic core 2 is fixedly installed on the blocking beam, the magnetic core 2 is of U-shaped structure, in the prior art, when selecting the magnetic core of common-mode inductance, the shape size, applicable frequency band, temperature rise and price are all considered, commonly used magnetic cores are U-shaped, E-shaped and ring-shaped, and in the utility model, the U-shaped magnetic core 2 can facilitate the installation of the coil 3 and the adjustment of the inductance value.
[0036] By cooperation of the above structures, the inductance value can be effectively adjusted, and the abrasion between the conductive sliding block 8 and the coil 3 can be reduced.
[0037] The standard parts used in the embodiment can be directly purchased from the market, the non-standard structural parts according to the description and the drawings can also be directly processed according to the existing technical knowledge without doubt, meanwhile, the connection mode of each part adopts the mature conventional means in the prior art, and the machine, parts and equipment all adopt the conventional models in the prior art, so the specific description is not made here.
[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A flat common mode inductor, characterized by: Include: The mold frame (1) is assembled with a magnetic core (2), and two coils (3) are symmetrically installed on the magnetic core (2); The coil (3) is spirally wound by flat copper wire, and the coil (3) has a spiral gap; The spiral outer wall of the coil (3) is also fixedly provided with two insulating dragon leaves (4), the two insulating dragon leaves (4) are synchronously arranged along the spiral direction of the coil (3), and the spiral assembly groove is formed between the coil (3) and the two insulating dragon leaves (4); The mold frame (1) is also provided with a conductive sliding block (8) which can slide axially along the coil (3), one end of the conductive sliding block (8) forms a sliding fit with the spiral assembly groove; The conductive sliding block (8) is a variable pin of the coil (3), and one end of the coil (3) is a fixed pin.
2. The flat common-mode inductor of claim 1, wherein: The assembly seat (13) is installed on the mold frame (1) and slides along the axial direction of the coil (3), the conductive column (12) is installed on the assembly seat (13) and slides along the radial direction of the coil (3), one end of the conductive column (12) is fixedly connected with the conductive sliding block (8), the other end of the conductive column (12) is fixedly connected with the terminal (16), the outer wall of the conductive column (12) is sleeved with an insulating spring, both ends of the insulating spring are fixedly connected with the outer wall of the conductive sliding block (8) and the assembly seat (13) respectively, the outer wall of the mold frame (1) is fixedly provided with a second pin (21), and the terminal (16) is electrically connected with the second pin (21) through a long flexible wire.
3. The flat common-mode inductor of claim 2, wherein: The shell (11) is detachably installed on the mold frame (1), the outer wall of the shell (11) is provided with an assembly hole, the inner wall of the assembly hole is fixedly provided with a limiting block (6), the limiting block (6) is provided with a yoke (15) which slides along the radial direction of the coil (3), the yoke (15) is provided with a limiting groove, the yoke (15) is embedded between the assembly seat (13) and the terminal (16) through the limiting groove, the outer wall of the conductive column (12) and the limiting groove are in sliding relationship, the assembly seat (13) and the conductive column (12) slide synchronously, and the shell (11) is designed with a relaxation switch which makes the conductive column (12) away from the coil (3).
4. The flat common-mode inductor of claim 3, wherein: The relaxation switch includes a wedge (14) which is slidably installed in the assembly hole in a damping mode, one end of the wedge (14) is in inclined surface transmission cooperation with one end of the yoke (15), and when the wedge (14) is displaced towards the mold frame (1), the yoke (15) can be away from the coil (3).
5. The flat molded common mode inductor of claim 2, wherein: The outer wall of the mold frame (1) is provided with a first pin (20), the first pin (20) is fixedly provided with a conductive ring (5), one end of the coil (3) is overlapped with the outer wall of the conductive ring (5), and the rotation of the coil (3) does not interfere with the electrical connection between the coil (3) and the first pin (20).
6. The flat molded common mode inductor of claim 3, wherein: The outer wall of the shell (11) is fixedly provided with a guide rail (18), the outer wall of the guide rail (18) is limitingly and slidably provided with a guide block (17), the guide block (17) is fixedly connected with the assembly seat (13), and the track direction of the guide rail (18) is parallel to the axial direction of the coil (3).
7. The flat co-moulded common mode inductor according to any of claims 1-6, characterized in that: The outer wall of the insulating leaf (4) is fixedly installed with an insulating rotating shaft (7), and the end of the insulating rotating shaft (7) is fixedly installed with a knob.
8. The flat common-mode inductor of claim 7, wherein: The outer wall of the conductive sliding block (8) is designed as an arc surface at the place where the conductive sliding block (8) is attached to the coil (3).
9. The flat molded common mode inductor of claim 7, wherein: The mold frame (1) is designed with a blocking beam, two coils (3) are respectively designed on the two sides of the blocking beam, the magnetic core (2) is fixedly installed on the blocking beam, and the magnetic core (2) is of a U-shaped structure.