Glue-free compact common mode inductor

Abstract

The utility model discloses a glue-free compact common-mode inductor, which comprises an inductor body, an inductor core and a coil, the two positioning supports are buckled to the other two sides of the magnetic core respectively, each positioning support comprises a bottom plate, a vertical plate, a top plate and a conductive terminal, the vertical plates abut against the outer wall of the magnetic core, the top plates and the bottom plates are located on the sides, close to the inductor body, of the vertical plates and located on the upper surface and the lower surface of the magnetic core respectively, and clamping structures are arranged on the sides, away from the vertical plates, of the top plates; the two opposite sides of the vertical plate are each connected with a conductive terminal, the bottom plate is provided with a first positioning hole, and the side, away from the vertical plate, of the bottom plate is provided with an inserting piece and an inserting groove. And the connecting plate is located in the ring of the magnetic core, a first positioning piece is arranged at the bottom of the connecting plate, and the first positioning piece is connected into the first positioning hole in an inserted mode. The multi-dimensional positioning device is compact and firm in structure and small in occupied space, positioning is achieved from multiple dimensions in a mechanical connection mode, production procedures can be effectively simplified, and energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of common mode inductors, and in particular to a glue-free compact common mode inductor. Background Technology

[0002] In existing electronic circuits, common-mode inductors are important components for filtering common-mode electromagnetic interference, and their compactness and stability have a crucial impact on the overall performance of the circuit.

[0003] In related technologies, in order to improve the reliability of common mode inductor structures, after the coil is wound onto the magnetic core to make the inductor body, it is often necessary to add a base with conductive terminals for mounting on the bottom of the inductor body. This takes up a lot of space, and this design often requires the use of glue or other adhesives to fix the inductor body and the base. This not only increases the complexity of the production process, but also the large amount of adhesive used will pollute the environment. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a glue-free compact common mode inductor that occupies little space, simplifies the production process, and its glue-free mechanical connection structure is environmentally friendly.

[0005] A glue-free compact common mode inductor according to an embodiment of the present invention includes:

[0006] The inductor body includes a magnetic core and a coil. The magnetic core is in the shape of a four-sided ring, and the coil has two sets, which are wound around opposite sides of the magnetic core respectively.

[0007] The positioning bracket has two parts, which are respectively fastened to the other two sides of the magnetic core. The positioning bracket includes a base plate, a vertical plate, a top plate, and conductive terminals. The top plate and the base plate are respectively connected to the upper and lower ends of the vertical plate. The vertical plate abuts against the outer wall of the magnetic core. The top plate and the base plate are both located on the side of the vertical plate closer to the inductor body. The top plate and the base plate are respectively located on the upper and lower surfaces of the magnetic core. The side of the top plate away from the vertical plate has a locking structure, which is locked into the inner wall of the magnetic core. Each side of the vertical plate is connected to a conductive terminal, which is conductively connected to the coil. The base plate has a first positioning hole, which is located inside the ring of the magnetic core. The side of the base plate away from the vertical plate has a plug and a slot. The plug of one positioning bracket is connected to the slot of the other positioning bracket.

[0008] A connecting plate is located inside the ring of the magnetic core. The bottom of the connecting plate is provided with a first positioning member that matches the first positioning hole. The number of first positioning members is equal to the number of first positioning holes. Each first positioning member is inserted into the corresponding first positioning hole.

[0009] In this embodiment, a support block is provided at the bottom of the base plate, and the first positioning element is a snap-fit ​​structure.

[0010] In this embodiment, each base plate has at least three support blocks at its bottom.

[0011] In this embodiment, the top plate is provided with a second positioning hole, the top of the connecting plate is provided with a positioning plate, and both ends of the positioning plate are provided with second positioning parts that match the second positioning hole. The second positioning parts are inserted into the second positioning hole.

[0012] In this embodiment, the slot is a dovetail groove, and the plug-in is in the shape of a dovetail that matches the slot.

[0013] In this embodiment, each positioning bracket has multiple plugs and slots.

[0014] In this embodiment, the conductive terminal is a conductive patch or a conductive pin.

[0015] In this embodiment, the top of the magnetic core is provided with a locking groove for the locking structure, and the locking structure is engaged in the locking groove.

[0016] The embodiments of this utility model have at least the following beneficial effects:

[0017] By designing a unique positioning bracket structure, the base plate, upright plate, and top plate can be tightly fitted to the surface of the magnetic core during production and assembly. This results in high space utilization, a compact and robust structure, and a small footprint, meeting the application requirements of thin and light products and having a wide range of applications. Two positioning brackets are assembled laterally to opposite sides of the positioning bracket and positioned by plug-in and slot connections. The connecting plate is inserted longitudinally into the ring of the magnetic core and positioned by the first positioning component and the first positioning hole. This effectively improves the stability of the relative position between the two positioning brackets. Moreover, the locking structure is engaged with the inner ring sidewall of the magnetic core. The connecting plate, in conjunction with the positioning brackets, can position the magnetic core from multiple dimensions, thereby significantly improving the stability and reliability of the overall structure and effectively ensuring the performance of the common mode inductor. This common mode inductor achieves positioning between the positioning brackets and the inductor body from multiple dimensions through mechanical connections, eliminating the need for adhesives. This not only effectively simplifies the production process and improves production efficiency but also reduces environmental pollution, saving energy and protecting the environment. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a three-dimensional structural diagram of the glue-free compact common mode inductor according to an embodiment of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the glue-free compact common mode inductor according to another perspective of an embodiment of the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of a glue-free compact common mode inductor according to another embodiment of the present invention;

[0022] Figure 4 This is an exploded structural diagram of the glue-free compact common mode inductor according to an embodiment of the present invention.

[0023] Figure label:

[0024] Inductor body 100, magnetic core 110, slot 111, coil 120;

[0025] Positioning bracket 200, base plate 210, first positioning hole 211, plug 212, slot 213, support block 214, upright plate 220, top plate 230, second positioning hole 231, locking structure 232, conductive terminal 240;

[0026] Connecting plate 300, first positioning component 310, positioning plate 320, second positioning component 321. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, if the wire sleeve or bracket is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] In existing electronic circuits, common-mode inductors are crucial components for filtering common-mode electromagnetic interference, and their compactness and stability have a significant impact on the overall circuit performance. In related technologies, to improve the reliability of the common-mode inductor structure, after winding the coil onto the magnetic core to form the inductor body, a base with conductive terminals is often added for mounting at the bottom of the inductor body. This occupies a large space, and such designs often require the use of glue or other adhesives to fix the inductor body and the base. This not only increases the complexity of the manufacturing process but may also lead to a decrease in inductor performance due to glue aging or poor curing. Furthermore, the large-scale use of adhesives can pollute the environment.

[0032] Furthermore, the base of traditional common-mode inductors is located at the bottom of the inductor body, resulting in a bulky overall structure that is difficult to meet the application requirements of thin and light products. Traditional common-mode inductor designs often fail to meet these requirements. Therefore, developing a common-mode inductor that requires no glue for fixing, has a compact structure, and offers good stability has become an urgent problem to be solved in the industry.

[0033] The following is for reference only. Figure 1 To be continued Figure 4 This invention describes a glue-free compact common mode inductor that occupies little space, simplifies the production process, and has an environmentally friendly structure with glue-free mechanical connections.

[0034] Reference Figures 1 to 4 An embodiment of the present invention provides a glue-free compact common mode inductor, comprising:

[0035] The inductor body 100 includes a magnetic core 110 and a coil 120. The magnetic core 110 is a four-sided ring, and the coil 120 is provided in two sets and is wound around the opposite sides of the magnetic core 110 respectively.

[0036] Positioning brackets 200 are provided, and are respectively fastened to the other two sides of the magnetic core 110. For each positioning bracket 200, the positioning bracket 200 includes a base plate 210, a vertical plate 220, a top plate 230, and two conductive terminals 240. The top plate 230 and the base plate 210 are respectively connected to the upper and lower ends of the vertical plate 220. The vertical plate 220 abuts against the outer ring sidewall of the magnetic core 110. The top plate 230 and the bottom plate 210 are both located on the side of the vertical plate 220 closer to the inductor body 100. The top plate 230 and the bottom plate 210 are respectively located on the upper and lower surfaces of the magnetic core 110. A locking structure 232 is provided on the side of the top plate 230 away from the vertical plate 220, that is, a locking structure 232 is provided on the side of the top plate 230 closer to the center of the magnetic core 110. Preferably, the locking structure 232 can be a buckle, and the locking structure 232 is engaged with the magnetic core 110. A conductive terminal 240 is connected to the inner ring sidewall of the core 110 and the opposite sides of the upright plate 220. The conductive terminal 240 is electrically connected to the corresponding pin of the coil 120 by means of welding or other methods. The length of the bottom plate 210 is greater than the length of the top plate 230, and the horizontal projection of the top plate 230 is located outside the horizontal projection of the space surrounded by the inner ring of the magnetic core 110. The bottom plate 210 is provided with a first positioning hole 211, which is located within the space surrounded by the ring of the magnetic core 110. That is, the horizontal projection of the first positioning hole 211 is located in the horizontal projection of the space surrounded by the inner ring of the magnetic core 110. The bottom plate 210 is provided with a plug 212 and a slot 213 on the side away from the upright plate 220. For the two positioning brackets 200, the plug 212 of one positioning bracket 200 is connected to the slot 213 of the other positioning bracket 200.

[0037] The connecting plate 300 is located within the annular space of the magnetic core 110. The bottom of the connecting plate 300 is provided with a first positioning member 310 that matches the first positioning hole 211. The number of first positioning members 310 is equal to the number of first positioning holes 211, and each first positioning member 310 is respectively connected to the corresponding first positioning hole 211, which can effectively improve the stability of the relative position between the two positioning brackets 200.

[0038] During assembly, the coil 120 is first wound around the magnetic core 110, and then the two positioning brackets 200 are snapped into the magnetic core 110 from the outside in the transverse direction. The plug 212 of one positioning bracket 200 is connected to the slot 213 of the other positioning bracket 200, thereby realizing the insertion and positioning connection of the two sets of plugs 212 and slots 213, which can form a preliminary positioning effect. Then, the connecting plate 300 is inserted longitudinally into the ring space of the magnetic core 110, and each first positioning component 310 is inserted into the corresponding first positioning hole 211, thereby further positioning the two positioning brackets 200. Finally, the pins of the coil 120 are electrically connected to the corresponding conductive terminals 240 by means of welding or other methods.

[0039] By designing a unique positioning bracket 200 structure, the base plate 210, upright plate 220, and top plate 230 can be tightly fitted to the surface of the magnetic core 110 during production and assembly. This results in high space utilization, a compact and robust structure, and a small footprint, meeting the application requirements of lightweight and thin products and having a wide range of applications. Two positioning brackets 200 are assembled laterally to opposite sides of the positioning bracket 200 and positioned by insertion of plug-in 212 and slot 213. The connecting plate 300 is inserted longitudinally into the ring of the magnetic core 110 and positioned by insertion of the first positioning member 310 and the first positioning hole 211. The current positioning effectively improves the stability of the relative position between the two positioning brackets 200. Furthermore, the locking structure 232 engages with the inner ring sidewall of the magnetic core 110. The connecting plate 300, in conjunction with the positioning brackets 200, can position the magnetic core 110 from multiple dimensions, thus significantly improving the overall structural stability and reliability. This common-mode inductor achieves positioning between the positioning brackets 200 and the inductor body 100 from multiple dimensions through mechanical connections, eliminating the need for adhesives. This not only effectively simplifies the production process and improves production efficiency but also reduces environmental pollution, promoting energy conservation and environmental protection. This common-mode inductor adopts a modular design; the components can be assembled together through simple mechanical connections without complex debugging processes, facilitating later maintenance and replacement.

[0040] Understandably, the bottom of the base plate 210 is provided with a support block 214, and the first positioning member 310 is a snap-fit ​​structure. The support block 214 can support the base plate 210. After the first positioning member 310 is snapped through the first positioning hole 211, it abuts against the bottom of the base plate 210, which can effectively improve the stability of the overall structure.

[0041] It is understood that each base plate 210 has at least three support blocks 214 at its bottom, and the three support blocks 214 are evenly distributed at the bottom of the base plate 210. By setting at least three support blocks 214 in one part of each base plate 210, the stability of the position of each positioning bracket 200 on the circuit board can be effectively improved, and the interaction force between the two positioning brackets 200 can be effectively reduced, thereby effectively improving the overall stability of the common mode inductor structure.

[0042] It is understandable that the top plate 230 is provided with a second positioning hole 231, and the top of the connecting plate 300 is provided with a positioning plate 320. Both ends of the positioning plate 320 are provided with second positioning elements 321 that match the second positioning hole 231. The second positioning elements 321 are inserted into the second positioning hole 231. By cooperating with the second positioning hole 231, the stability of the relative position between the two positioning brackets 200 can be effectively improved. The first positioning element 310 and the first positioning hole 211 cooperate with the second positioning element 321 and the second positioning hole 231 to position the two positioning brackets 200 from the upper and lower positions respectively, which can effectively improve the overall structural integrity.

[0043] It is understandable that the slot 213 is a dovetail slot, and the plug-in 212 is in the shape of a dovetail that matches the slot 213. The connection between the two base plates 210 is achieved by setting the dovetail structure, which can realize positioning in two horizontal dimensions. This can effectively improve the stability of the connection structure between the two positioning brackets 200, thereby effectively improving the reliability of this common mode inductor structure, effectively improving the alignment accuracy, and thus effectively improving the consistency and electrical performance of this common mode inductor.

[0044] During assembly, the two base plates 210 are slightly bent in opposite directions to achieve the snap-fit ​​connection between the plug-in 212 and the slot 213. The assembly operation is convenient and the connection structure is stable and reliable.

[0045] It is understandable that each positioning bracket 200 has multiple plugs 212 and slots 213, and the stability of the connection structure between the two positioning brackets 200 can be further improved by using multiple sets of plugs 212 and slots 213.

[0046] It is understandable that the conductive terminal 240 is a conductive patch or a conductive pin. Depending on different requirements, the conductive terminal 240 can be configured with different terminal structures to meet the needs of surface mount soldering and plug-in soldering.

[0047] When the conductive terminal 240 is configured as a conductive pin, the structure of this common-mode inductor is referenced. Figure 1 , Figure 2 and Figure 4 As shown; when the conductive terminal 240 is configured as a conductive patch, the structure of this common-mode inductor is referenced. Figure 3 As shown.

[0048] It is understandable that the top of the magnetic core 110 is provided with a slot 111 for the slotting structure 232. The slotting structure 232 is engaged in the slot 111. By using the slot 111 to accommodate the slotting structure 232, the stability of the connection structure between the positioning bracket 200 and the magnetic core 110 can be improved.

[0049] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A glue-free compact common-mode inductor, characterized in that, include: The inductor body (100) includes a magnetic core (110) and a coil (120). The magnetic core (110) is in the shape of a four-sided ring, and the coil (120) is provided in two sets and is respectively wound around the opposite sides of the magnetic core (110). Positioning brackets (200) are provided in two and are respectively fastened to the other two sides of the magnetic core (110). The positioning brackets (200) include a base plate (210), a vertical plate (220), a top plate (230), and conductive terminals (240). The top plate (230) and the base plate (210) are respectively connected to the upper and lower ends of the vertical plate (220). The vertical plate (220) abuts against the outer wall of the magnetic core (110). The top plate (230) and the base plate (210) are both located on the side of the vertical plate (220) closer to the inductor body (100). The top plate (230) and the base plate (210) are respectively located on the upper and lower surfaces of the magnetic core (110). The top plate (230) is away from the magnetic core (110). A locking structure (232) is provided on one side of the upright plate (220), the locking structure (232) is locked into the inner wall of the magnetic core (110), and a conductive terminal (240) is connected to each of the opposite sides of the upright plate (220). The conductive terminal (240) is electrically connected to the coil (120). The bottom plate (210) is provided with a first positioning hole (211), the first positioning hole (211) is located inside the ring of the magnetic core (110). A plug (212) and a slot (213) are provided on the side of the bottom plate (210) away from the upright plate (220). The plug (212) of one positioning bracket (200) is connected to the slot (213) of another positioning bracket (200). A connecting plate (300) is located inside the ring of the magnetic core (110). The bottom of the connecting plate (300) is provided with a first positioning member (310) that matches the first positioning hole (211). The number of the first positioning members (310) is equal to the number of the first positioning holes (211). Each first positioning member (310) is inserted into the corresponding first positioning hole (211).

2. The glue-free compact common mode inductor according to claim 1, characterized in that, The bottom of the base plate (210) is provided with a support block (214), and the first positioning member (310) is a snap-fit ​​structure.

3. The glue-free compact common-mode inductor according to claim 2, characterized in that, Each of the base plates (210) has at least three support blocks (214) at its bottom.

4. The glue-free compact common mode inductor according to claim 1, characterized in that, The top plate (230) is provided with a second positioning hole (231), and the top of the connecting plate (300) is provided with a positioning plate (320). Both ends of the positioning plate (320) are provided with second positioning parts (321) that match the second positioning hole (231). The second positioning parts (321) are inserted into the second positioning hole (231).

5. The glue-free compact common mode inductor according to claim 1, characterized in that, The slot (213) is a dovetail groove, and the plug (212) is in the shape of a dovetail that matches the slot (213).

6. The glue-free compact common-mode inductor according to claim 5, characterized in that, Each of the positioning brackets (200) has multiple plugs (212) and slots (213).

7. The glue-free compact common mode inductor according to claim 1, characterized in that, The conductive terminal (240) is a conductive patch or a conductive pin.

8. The glue-free compact common mode inductor according to claim 1, characterized in that, The top of the magnetic core (110) is provided with a slot (111) for the slotting structure (232), and the slotting structure (232) is engaged in the slot (111).

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