Thin differential and common mode inductor

Abstract

The utility model relates to a thinned differential and common mode inductor, which comprises a base, a magnetic core and two windings, the base is formed by mutually and transversely splicing two splicing blocks, each splicing block comprises a substrate and a mounting frame, a groove for winding and mounting one winding is formed on the outer surface of each mounting frame, and the magnetic core is arranged in the groove. A first containing groove with the two opposite sides open is formed in the mounting frame, and an open groove is formed in the inner end of the mounting frame. The magnetic cores are two E-shaped magnets, and each E-shaped magnet comprises a connecting column, a middle column and a side column; the two splicing blocks are mutually fixed through a first fixing structure and a second fixing structure, after the two splicing blocks are spliced into the base, the two opening grooves in the base are mutually encircled to form a second containing groove, the side columns are contained and assembled in the first containing groove, and the middle column is contained and assembled in the second containing groove. The flat splicing blocks and the E-shaped magnets are adopted, and the layout of the groove bodies in the base is optimized, so that the overall height of the inductor can be effectively reduced, and the inductor is thinned and miniaturized.

Description

Technical Field

[0001] This utility model relates to the field of inductor devices, and in particular to a thin differential common-mode inductor. Background Technology

[0002] Differential and common-mode inductors are inductor devices that can filter out differential-mode and common-mode interference, and are widely used in power supply circuits, communication equipment, and other fields. With the rapid development of electronic products, the demand for high-performance, compact, and thin differential and common-mode inductors is also increasing.

[0003] However, current differential and common-mode inductors have some drawbacks. They occupy a large vertical space, with an overall height often exceeding 10 millimeters, making it difficult to achieve thinner and smaller designs. In practical power module applications, space is relatively compact, and existing differential and common-mode inductors cannot meet the requirements for such compact layouts. Utility Model Content

[0004] Therefore, it is necessary to provide a thinner differential common-mode inductor.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A thin differential common-mode inductor includes a base, magnetic cores respectively disposed on the base, and two windings respectively wound by wires. The base is formed by two splicing blocks laterally joined together. Each splicing block includes a substrate and a mounting bracket formed on the substrate. The outer surface of the mounting bracket has a groove for mounting one of the windings, and the interior of the mounting bracket has a first receiving groove with openings on both sides. The inner end of the mounting bracket has an opening slot. The magnetic core consists of two E... The E-shaped magnet includes a connecting post at one end, a central post extending from the same side of the connecting post, and side posts located on both sides of the central post. The splicing ends between the two splicing blocks are fixed to each other by a first fixing structure and a second fixing structure to form the base. After the base is assembled, the two opening slots on the base surround each other to form a second receiving slot. The two E-shaped magnets are respectively inserted into the sides of the base so that the side posts are received and assembled in the first receiving slot, and the central post is received and assembled in the second receiving slot.

[0006] In one embodiment, the first fixing structure includes sockets and pins respectively provided on both sides of the inner end face of the splicing block, and correspondingly opposite pins and sockets provided on another splicing block.

[0007] In one embodiment, the outer end of the pin has a convex arc portion, and the socket is adapted to the shape of the convex arc portion. The pin of one splicing block is inserted into and pushed into the socket on another splicing block by the convex arc portion and is pressed and positioned by the inner wall of the socket.

[0008] In one embodiment, one of the splicing ends of the two splicing blocks is provided with a positioning block and the other splicing end is provided with a positioning groove for receiving and positioning the positioning block.

[0009] In one embodiment, the second fixing structure includes elastic buckles and buckle grooves respectively provided on both sides of the substrate of one of the splicing blocks, and buckle grooves and elastic buckles respectively provided on the substrate of the other splicing block in the opposite manner.

[0010] In one embodiment, the elastic buckle includes an elastic cantilever disposed on a substrate and a buckle portion disposed outward at the end of the elastic cantilever for engaging with the corresponding buckle groove.

[0011] In one embodiment, the mounting bracket is further provided with a partition plate in the middle section, and the bottom end of the partition plate is provided with a notch for the wires of the winding to pass through.

[0012] In one embodiment, the mounting bracket is provided with baffles at the outer periphery of opposite sides of the partition plate for limiting the side ends of the windings. The bottom end of the baffle is also provided with a wire groove, and the wires at both ends of each winding pass through the corresponding wire groove and are respectively connected to the pins provided on the bottom surface of the substrate.

[0013] In one embodiment, the outer side wall of the substrate adjacent to the wire guide groove is further provided with a guide rope portion for guiding the wire passing through the wire guide groove and extending to the pin.

[0014] In one embodiment, the bottom surface of the side column of the E-shaped magnet is fixed in the first receiving groove by adhesive, and / or the bottom surface of the middle column of the E-shaped magnet is fixed in the second receiving groove by adhesive.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a thin differential / common mode inductor. By further disassembling the base into two horizontally connectable splicing blocks, each winding is installed in a groove on the mounting bracket of the corresponding splicing block. The two splicing blocks are fixed together by a first fixing structure and a second fixing structure to form the base. The first receiving groove formed after splicing and the second receiving groove inside the mounting bracket precisely accommodate the side and center posts of the E-shaped magnet, respectively, thereby achieving the assembly of the magnetic core and windings. In summary, this utility model uses flat splicing blocks and E-shaped magnets, and by optimizing the groove layout within the base, it can effectively reduce the overall height of the inductor, making the inductor thinner and smaller. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an optional embodiment of the thin differential common-mode inductor of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure from another perspective of an optional embodiment of the thin differential common-mode inductor of this utility model;

[0019] Figure 3 This is a schematic diagram of the split structure with the winding removed, representing an alternative embodiment of the thinner differential common-mode inductor of this utility model.

[0020] Figure 4 This is a schematic diagram of the base of an optional embodiment of the thin differential common-mode inductor of this utility model.

[0021] In the attached diagram, 1 is the base; 10 is the splicing block; 101 is the base plate; 1011 is the guide rope part; 102 is the mounting bracket; 1021 is the first receiving groove; 1022 is the groove; 1023 is the opening groove; 1024 is the second receiving groove; 103 is the positioning block; 104 is the positioning groove; 105 is the partition plate; 1051 is the notch; 106 is the baffle; 1061 is the wire passage groove; 3 is the E-shaped magnet; 31 is the connecting post; 32 is the middle post; 33 is the side post; 5 is the winding; 6 is the first fixing structure; 61 is the socket; 62 is the pin; 620 is the convex arc part; 7 is the second fixing structure; 71 is the elastic buckle; 711 is the elastic cantilever; 712 is the buckle part; 72 is the buckle groove; and 8 is the pin. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0023] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship 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 component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] In one embodiment, such as Figures 1-4 As shown, a thin differential common-mode inductor includes a base 1, magnetic cores respectively disposed on the base 1, and two windings 5 ​​respectively wound with wires. The base 1 is formed by two interlocking blocks 10 joined laterally. Each interlocking block 10 includes a substrate 101 and a mounting bracket 102 formed on the substrate 101. The outer surface of the mounting bracket 102 has a groove 1022 for winding one of the windings 5, and the interior of the mounting bracket 102 has a first receiving groove 1021 with openings on both sides. The inner end of the mounting bracket 102 has an opening groove 1023. The magnetic core consists of two E-shaped magnets 3. The body 3 includes a connecting post 31 at one end, a central post 32 extending from the same side of the connecting post 31, and side posts 33 located on both sides of the central post 32. The splicing ends between the two splicing blocks 10 are fixed to each other by a first fixing structure 6 and a second fixing structure 7 to form the base 1. After splicing into the base 1, the two opening slots 1023 on the base 1 surround each other to form a second receiving slot 1024. Two E-shaped magnets 3 are respectively inserted into the base 1 on both sides so that the side posts 33 are housed and assembled in the first receiving slot 1021, and the central post 32 is housed and assembled in the second receiving slot 1024.

[0025] Compared with the prior art, the present invention has at least the following advantages: The present invention provides a thin differential common-mode inductor by further dividing the base 1 into two horizontally splicable splicing blocks 10. Each winding 5 is correspondingly installed in the groove 1022 on the mounting bracket 102 of the corresponding splicing block 10. The two splicing blocks 10 are combined and fixed by the first fixing structure 6 and the second fixing structure 7 to form the base 1. The first receiving groove 1021 formed after splicing and the second receiving groove 1024 inside the mounting bracket 102 are used to accurately accommodate the side post 33 and the middle post 32 of the E-shaped magnet 3, respectively, thereby realizing the assembly of the magnetic core and the winding 5. In summary, the present invention uses flat splicing blocks 10 and E-shaped magnets 3, and by optimizing the groove layout in the base, it can effectively reduce the overall height of the inductor, making the inductor thinner and smaller.

[0026] In one embodiment, such as Figures 1-4 As shown, the first fixing structure 6 includes insertion holes 61 and pins 62 respectively provided on both sides of the side end face of the splicing block 10, and correspondingly opposite pins 62 and insertion holes 61 provided on another splicing block 10. The insertion holes 61 and pins 62 are located at the top of the splicing block 10. In this embodiment, the first fixing structure 6 adopts a cross-reverse interlocking design of insertion holes 61 and pins 62 on both sides of the side end face of the splicing block 10. That is, one splicing block 10 is provided with a combination of insertion holes 61 / pins 62, and the other splicing block 10 is provided with a corresponding opposite combination of pins 62 / insertion holes 61. This allows the two splicing blocks 10 to be spliced ​​in a single direction, which can avoid assembly errors and effectively improve assembly efficiency.

[0027] In one embodiment, such as Figures 1-4 As shown, the outer end of the pin 62 has a convex arc portion 620, and the shape of the insertion hole 61 is adapted to the shape of the convex arc portion 620. The pin 62 of one splicing block 10 is inserted into and pushed against the insertion hole 61 on another splicing block 10 by the convex arc portion 620, and is pressed and positioned by the inner wall of the insertion hole 61. In this embodiment, by specifically providing a convex arc portion 620 at the outer end of the pin 62, and by the convex arc portion 620 being pushed and pressed and fixed by the inner wall of the insertion hole 61, the two splicing blocks 10 are not easily loosened, and the positioning and fixing between the two splicing blocks 10 can be effectively achieved.

[0028] In one embodiment, such as Figures 1-4As shown, one splicing end of the two splicing blocks 10 is provided with a positioning block 103, while the other splicing end is provided with a positioning groove 104 for accommodating and positioning the positioning block 103. In a specific implementation, in this embodiment, a combination of positioning block 103 / positioning groove 104 is provided on the side end face of the substrate 101 of one splicing block 10, while a combination of positioning groove 104 / positioning block 103 is provided at the corresponding position of the other splicing block 10, which can further improve the assembly accuracy between the two splicing blocks 10.

[0029] In one embodiment, such as Figures 1-4 As shown, the second fixing structure 7 includes elastic buckles 71 and buckle grooves 72 respectively provided on both sides of the base plate 101 of one of the splicing blocks 10, and buckle grooves 72 and elastic buckles 71 respectively provided on the base plate 101 of the other splicing block 10. In a specific implementation, the side end face of the base plate 101 of one splicing block 10 is provided with a combination of elastic buckles 71 and buckle grooves 72, while the corresponding position of the other splicing block 10 is provided with a reverse combination of buckle grooves 72 and elastic buckles 71. The two splicing blocks 10 can be conveniently positioned and fixed by the buckling and fixing between the elastic buckles 71 and the corresponding buckle grooves 72.

[0030] In one embodiment, such as Figures 1-4 As shown, the elastic buckle 71 includes an elastic cantilever 711 disposed on the substrate 101 and a buckling part 712 for engaging with the corresponding buckling groove 72, which is externally folded at the end of the elastic cantilever 711. In this embodiment, the elastic buckle 71 specifically has an elastic cantilever 711 and a buckling part 712 disposed on the substrate 101. After the elastic cantilever 711 is compressed and deformed, it is engaged with the buckling groove 72 by the buckling part 712, effectively ensuring the fixing effect, and its structural design is relatively simple.

[0031] In one embodiment, such as Figures 1-4 As shown, the mounting bracket 102 is also provided with a partition plate 105 in the middle section, and the bottom end of the partition plate 105 is provided with a notch 1051 for the wires of the corresponding winding 5 to pass through. In this embodiment, by providing a partition plate 105 with a notch 1051 in the middle section of the mounting bracket 102, the wires of the winding 5 can continue to bend and wind on the groove 1022 through the notch 1051, so that the partition plate 105 can efficiently arrange and reliably fix the wires of the winding 5 in the groove 1022. Moreover, the partition plate 105 divides the groove 1022 into two slots, which can isolate one side of the winding 5 to form two independent areas for the wires, effectively reducing magnetic leakage.

[0032] In one embodiment, such as Figures 1-4As shown, the mounting bracket 102 has baffles 106 on the outer periphery of opposite sides of the partition plate 105 for limiting the side ends of the windings 5. The bottom of each baffle 106 has a wire-passing groove 1061. The wires at both ends of each winding 5 pass through the corresponding wire-passing groove 1061 and connect to the pins 8 on the bottom surface of the substrate 101. The bottom surface of the substrate 101 has four pins 8, with two pins 8 on each side. The wires at both ends of the windings 5 ​​on the corresponding side of the base 1 are directly opposite the two pins 8. In this embodiment, by providing baffles 106 on both sides of the partition plate 105 on the mounting bracket 102, and by providing wire-passing grooves 1061 at the bottom of the baffles 106, a routing path can be provided for the wires of the windings 5, effectively shortening the connection distance between the wires and the pins 8, resulting in a relatively compact structure.

[0033] In one embodiment, such as Figures 1-4 As shown, the outer side wall of the substrate 101 adjacent to the wire groove 1061 is also provided with a guide rope portion 1011 for guiding the wire of the winding 5 through the wire groove 1061 and extending to the pin 8. Four guide rope portions 1011 are provided on the substrate 101 at the edges of each wire groove 1061. In this embodiment, by further providing guide rope portions 1011 on the substrate 101, the wire on the winding 5 can be bent through the guide rope portion 1011 and connected to the pin 8, which reasonably optimizes the wiring layout and makes the structure more compact.

[0034] In one embodiment, such as Figures 1-4 As shown, the bottom surface of the side post 33 of the E-shaped magnet 3 is fixed in the first receiving groove 1021 by adhesive, and / or the bottom surface of the middle post 32 of the E-shaped magnet 3 is fixed in the second receiving groove 1024 by adhesive. In this embodiment, the side post 33 and / or the middle post 32 of the E-shaped magnet 3 are fixed to the corresponding first receiving groove 1021 and second receiving groove 1024 by adhesive, so that the magnetic core can be conveniently assembled and fixed on the base 1.

[0035] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A thin differential common-mode inductor comprising a base, a magnetic core and two windings each wound by a wire provided on the base, characterized in that, The base is formed by two blocks transversely spliced together, each block comprising a base plate and a mounting frame formed on the base plate, the outer surface of the mounting frame being formed with a groove for winding the winding, and the mounting frame being internally provided with a first accommodating groove with opposite two open sides, and the inner end of the mounting frame being provided with an open slot; the magnetic core is two E-shaped magnets, each E-shaped magnet comprising a connecting column at one end, a middle column extending from the same side of the connecting column, and side columns respectively at two sides of the middle column; the spliced ends of the two blocks are fixed together by the first and second fixing structures to form the base, and after being spliced together to form the base, the two open slots on the base form a second accommodating groove together, and the two E-shaped magnets are respectively inserted into the first and second accommodating grooves to make the side columns accommodated and assembled in the first accommodating groove and the middle column accommodated and assembled in the second accommodating groove.

2. The thin down differential mode inductance according to claim 1, characterized in that, The first fixing structure comprises a socket and a pin respectively arranged on the two sides of the inner end surface of the block, and a pin and a socket respectively arranged on the other block.

3. The thin down differential mode inductance according to claim 2, characterized in that, The outer end of the pin has a convex arc portion, and the shape of the socket is matched with the convex arc portion, and the pin of one block is inserted into the socket of the other block and pushes the socket of the other block, and the pin is positioned by the inner hole wall of the socket.

4. The thin down differential mode inductance according to claim 1 or 2, characterized by, One of the two blocks is provided with a positioning block at one end, and the other end is provided with a positioning groove for accommodating and positioning the positioning block.

5. The thin down differential mode inductance according to claim 1 or 2, characterized by, The second fixing structure comprises a resilient buckle and a buckle groove respectively arranged on the two sides of the base plate of one block, and a buckle groove and a resilient buckle respectively arranged on the base plate of the other block.

6. The thin down differential mode inductance according to claim 5, characterized in that, The resilient buckle comprises a resilient cantilever arranged on the base plate and a buckle portion arranged on the outer end of the resilient cantilever for engaging with the corresponding buckle groove.

7. The thin down differential mode inductance according to claim 1, characterized in that, The middle section of the mounting frame is further provided with a partition plate, and the bottom end of the partition plate is further provided with a notch for the lead wire of the winding.

8. The thin down differential mode inductance according to claim 7, characterized in that, The outer periphery of the mounting frame on the opposite sides of the partition plate is provided with a baffle for limiting the side end of the winding, and the bottom end of the baffle is further provided with a wire slot, and the lead wires at both ends of the winding are connected with the pins arranged on the bottom surface of the base plate through the wire slots.

9. The thin down differential mode inductance according to claim 8, characterized in that, The outer side wall of the base plate adjacent to the wire slot is further provided with a guide rope portion for guiding the lead wire passing through the wire slot to extend and connect to the pin.

10. The thin down-mode differential inductor of claim 1, wherein, The bottom surface of the side column of the E-shaped magnet is fixed in the first accommodating groove by adhesive, and / or the bottom surface of the middle column of the E-shaped magnet is fixed in the second accommodating groove by adhesive.

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