Miniaturized transformer and circuit board

Abstract

The utility model discloses a miniaturized transformer and a circuit board. The miniaturized transformer comprises a primary framework, a secondary framework and two magnetic cores, a first through groove is formed in the middle of the secondary framework, the primary framework is arranged in the first through groove and forms a framework structure with the secondary framework, and the two magnetic cores are arranged at the top and the bottom of the framework structure respectively; a second through groove is formed in the middle of the primary framework, and a mounting groove is formed between the side wall of the primary framework and the groove wall of one side of the first through groove; the magnetic core comprises a middle column and a side column, the middle column is located in the second through groove, and the side column is located in the mounting groove; according to the miniaturized transformer disclosed by the invention, the primary framework is arranged in the secondary framework, so that the compact design of the transformer structure is realized, the size of the transformer is remarkably reduced, and the overall leakage inductance of the transformer is also increased; the magnetic core comprises a middle column used for controlling main inductance and a side column used for adjusting leakage inductance, the working efficiency of the miniature transformer can be improved, and the excellent performance of the miniature transformer in various application occasions is ensured.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a miniaturized transformer and circuit board. Background Technology

[0002] In contemporary times, with the continuous evolution and innovation of electronic device technology, miniaturization and thinning have become key trends in electronic device design. Faced with this trend, electronic device manufacturers share a common challenge: how to further reduce the size of electronic device casings or reduce their footprint while maintaining or even improving performance.

[0003] However, in the pursuit of miniaturization of coil assemblies, a problem easily arises: while reducing the size, it is difficult to ensure that the coil assembly meets the insulation performance requirements or reaches the minimum insulation distance specified by domestic and international safety standards. Specifically, in the existing technical field, the common method for miniaturizing coil assemblies is to sequentially wind the primary coil and the secondary coil onto a common coil frame, and then tightly integrate the coil frame with the core to form a coil assembly. This design performs well in large or standard-sized coil assemblies, but in the application of miniaturized coil assemblies, due to the limitation of the coil frame size, it is easy to encounter the problem that the insulation distance between the external connection terminals on the primary side and the external connection terminals on the secondary side cannot be adequately guaranteed.

[0004] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a miniaturized transformer, which realizes a compact design of the transformer structure, not only significantly reducing its size, but also increasing the overall leakage inductance of the transformer.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A miniaturized transformer includes a primary frame, a secondary frame, and two magnetic cores. A first through slot is formed in the middle of the secondary frame, and the primary frame is disposed within the first through slot, forming a frame structure with the secondary frame. The two magnetic cores are respectively disposed at the top and bottom of the frame structure. A second through slot is formed in the middle of the primary frame, and a mounting groove is formed between the side wall of the primary frame and one side wall of the first through slot. Each magnetic core includes a central post and side posts, with the central post located within the second through slot and the side posts located within the mounting groove.

[0008] In the miniaturized transformer, the primary frame includes a first top plate, a first bottom plate, and a first winding post. The top of the first winding post is fixedly connected to the bottom of the first top plate, and the bottom of the first winding post is fixedly connected to the top of the first bottom plate. The first winding post is used to wind the primary coil. The first top plate is flush with the upper surface of the secondary frame, and the first bottom plate is flush with the lower surface of the secondary frame. The second through slot is formed in the middle of the first winding post.

[0009] In the miniaturized transformer, the secondary frame includes a second top plate, a second bottom plate, and a second winding post. The top of the second winding post is fixedly connected to the bottom of the second top plate, and the bottom of the second winding post is fixedly connected to the top of the second bottom plate. The second winding post is used to wind the secondary coil. The upper surface of the second top plate is flush with the upper surface of the first top plate, and the lower surface of the second bottom plate is flush with the lower surface of the first bottom plate. The first through slot is formed in the middle of the second winding post. The mounting groove is formed between one side wall of the first winding post and one side wall of the first through slot.

[0010] In the miniaturized transformer, three first fixing posts are provided on one side of the first base plate, and four first fixing posts are provided on the other side of the first base plate. First connecting pins are respectively connected to the outer side of the first fixing posts. Two second fixing posts are provided on one side of the second base plate. The two second fixing posts are respectively located at both ends of the three first fixing posts, and second connecting pins are connected to the outer side of the second fixing posts.

[0011] In the miniaturized transformer, a wire groove is formed between adjacent first fixed columns.

[0012] In the miniaturized transformer, a limiting plate is provided on one side of the bottom of the first base plate, and a first positioning block is provided on the other side of the bottom of the first base plate; a first limiting groove is provided on one side of the bottom of the second base plate, and second positioning blocks are respectively provided at both ends of the other side of the bottom of the second base plate; the limiting plate is connected to the first limiting groove, and the two ends of the first positioning block abut against the two second positioning blocks respectively.

[0013] In the miniaturized transformer, two first limiting blocks are provided on the top of the first top plate, and two second limiting blocks are provided on the bottom of the first bottom plate; the two first limiting blocks and the two second limiting blocks are respectively located at both ends of the second through slot; the first limiting blocks are used to limit the movement position of the magnetic core located at the top, and the second limiting blocks are used to limit the movement position of the magnetic core located at the bottom.

[0014] In the miniaturized transformer, the magnetic core includes a U-shaped body, a central column is disposed in the inner middle of the U-shaped body, and a side column is disposed in the U-shaped body and located on one side of the central column; a receiving groove is formed between the U-shaped bodies of the two magnetic cores, and the skeleton structure is located in the receiving groove.

[0015] In the miniaturized transformer, a second limiting groove is provided on both sides of the U-shaped body, and the second limiting groove is located at both ends of the central column; the two second limiting grooves are respectively connected to the two first limiting blocks or the two second limiting blocks.

[0016] The present invention also provides a circuit board on which a miniaturized transformer as described above is disposed.

[0017] Beneficial effects:

[0018] This utility model provides a miniaturized transformer. By placing the primary frame inside the secondary frame, a compact design of the transformer structure is achieved, which not only significantly reduces its size and saves design space, but also increases the overall leakage inductance of the transformer. The magnetic core includes a central column for controlling the main inductance and a side column for adjusting the leakage inductance. Through the cooperation of the central column and side column with the primary frame and the secondary frame, the working efficiency of the miniaturized transformer can be improved, ensuring that it has excellent performance in various applications. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of the small transformer provided by this utility model;

[0020] Figure 2 A first structural schematic diagram of the primary and secondary skeletons provided by this utility model;

[0021] Figure 3 A second structural schematic diagram of the primary and secondary skeletons provided by this utility model;

[0022] Figure 4 A schematic diagram of the magnetic core provided by this utility model.

[0023] Explanation of main component symbols: 1-Primary skeleton, 101-Second through slot, 102-First top plate, 103-First bottom plate, 104-First fixing post, 105-First connector pin, 106-Wire passage slot, 107-Limiting plate, 108-First positioning block, 109-First limiting block, 110-Second limiting block, 2-Secondary skeleton, 21-First through slot, 22-Second top plate, 23-Second bottom plate, 24-Second winding post, 25-Second fixing post, 26-Second connector pin, 27-Second positioning block, 3-Magnetic core, 31-Middle post, 32-Side post, 33-U-shaped body, 34-Second limiting slot. Detailed Implementation

[0024] This utility model provides a miniaturized transformer and circuit board. To make the purpose, technical solution and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments.

[0025] In the description of this utility model, it should be understood that the terms "top", "bottom", "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and should not be construed as limiting this utility model; in addition, the terms "installation", "connection", etc. should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Please see Figures 1 to 4 This utility model provides a miniaturized transformer, including a primary frame 1, a secondary frame 2, and two magnetic cores 3; the secondary frame 2 has a first through slot 21 in the middle, the primary frame 1 is disposed in the first through slot 21, forming a frame structure with the secondary frame 2, and the two magnetic cores 3 are respectively disposed at the top and bottom of the frame structure; the primary frame 1 has a second through slot 101 in the middle, and a mounting groove is formed between the side wall of the primary frame 1 and one side wall of the first through slot 21; the magnetic core 3 includes a central column 31 and a side column 32, the central column 31 is located in the second through slot 101, and the side column 32 is located in the mounting groove.

[0027] This application discloses a miniaturized transformer. By placing the primary frame 1 within the secondary frame 2, a compact transformer structure is achieved, significantly reducing its size and saving design space, while also increasing the overall leakage inductance of the transformer. The magnetic core 3 includes a center column 31 and side columns 32. The center column 31 is used to control the main inductance, ensuring effective transmission of magnetic flux and reducing magnetic flux leakage, thereby improving energy conversion efficiency. The side columns 32 are used to adjust the leakage inductance, which is an undesirable inductance component in the transformer, leading to energy loss and voltage fluctuations. By properly setting the side columns 32, the magnitude of the leakage inductance can be effectively controlled, thereby reducing energy loss and improving the output voltage stability of the transformer. Therefore, by using the center column 31 and side columns 32 in conjunction with the primary frame 1 and secondary frame 2, the operating efficiency of the miniaturized transformer can be improved, ensuring excellent performance in various applications.

[0028] Further, please refer to Figure 2 and Figure 3 The primary frame 1 includes a first top plate 102, a first bottom plate 103, and a first winding post. The top of the first winding post is fixedly connected to the bottom of the first top plate 102, and the bottom of the first winding post is fixedly connected to the top of the first bottom plate 103. The first winding post is used to wind the primary coil. The first top plate 102 is flush with the upper surface of the secondary frame 2, and the first bottom plate 103 is flush with the lower surface of the secondary frame 2. The second through slot 101 is formed in the middle of the first winding post.

[0029] In this embodiment, the first top plate 102, the first bottom plate 103, and the first winding post are integrally formed, which can improve the stability of the entire primary frame 1 structure, enabling it to withstand greater mechanical stress and ensuring stability and safety during the winding process. The top plate of the primary frame 1 and the upper surface of the secondary frame 2 are aligned with the same plane, and the bottom plate of the primary frame 1 and the lower surface of the secondary frame 2 are also aligned with the same plane, so that the primary frame 1 and the secondary frame 2 are tightly integrated, and the formed frame structure is tightly fitted to the inner wall of the magnetic core 3, which significantly reduces the overall height of the transformer, thereby facilitating the miniaturization and weight reduction of the transformer.

[0030] Further, please refer to Figure 2 and Figure 3The secondary frame 2 includes a second top plate 22, a second bottom plate 23, and a second winding post 24. The top of the second winding post 24 is fixedly connected to the bottom of the second top plate 22, and the bottom of the second winding post 24 is fixedly connected to the top of the second bottom plate 23. The second winding post 24 is used to wind the secondary coil. The second top plate 22 is flush with the upper surface of the first top plate 102, and the second bottom plate 23 is flush with the lower surface of the first bottom plate 103. The first through groove 21 is opened in the middle of the second winding post 24. The mounting groove is formed between one side wall of the first winding post and one side wall of the first through groove 21.

[0031] In this embodiment, the second top plate 22, the second bottom plate 23, and the second winding post 24 are integrally formed, which can improve the stability of the entire secondary skeleton 2 structure, enabling it to withstand greater mechanical stress and ensuring stability and safety during the winding process.

[0032] Further, please refer to Figure 2 and Figure 3 Three first fixing posts 104 are provided on one side of the first base plate 103, and four first fixing posts 104 are provided on the other side of the first base plate 103. First connector pins 105 are respectively connected to the outer side of the first fixing posts 104. Two second fixing posts 25 are provided on one side of the second base plate 23. The two second fixing posts 25 are respectively located at both ends of the three first fixing posts 104. Second connector pins 26 are connected to the outer side of the second fixing posts 25.

[0033] In this embodiment, three first fixing posts 104 are provided on one side of the first base plate 103, while four first fixing posts 104 are provided on the other side. This asymmetrical design not only enhances the overall stability but also makes the weight distribution more uniform. Two second fixing posts 25 are provided on one side of the second base plate 23, and the two second fixing posts 25 are located at the two ends of the three first fixing posts 104 respectively. This layout not only ensures the compactness of the structure but also greatly improves the overall torsional resistance, enabling the entire transformer to maintain stable operation even in complex environments. Each first fixing post 104 and second fixing post 25 is connected to a corresponding first terminal pin 105 and second terminal pin 26 on its outer side, which ensures a stable and reliable electrical connection between the transformer and the circuit board, preventing circuit faults caused by poor contact or loosening. The use of terminal pins enhances the safety of electrical equipment, not only reducing losses during transmission but also ensuring that the current flows along a predetermined path, avoiding potential safety hazards caused by current leakage or short circuits.

[0034] In this embodiment, the first connector 105 is welded or crimped to the first fixing post 104, and the first fixing post 104 is integrally formed with the primary frame 1; the second connector 26 is welded or crimped to the second fixing post 25, and the second fixing post 25 is integrally formed with the secondary frame 2.

[0035] Further, please refer to Figure 2 and Figure 3 A wire groove 106 is formed between adjacent first fixed posts 104.

[0036] In this embodiment, the wire trough 106 formed between adjacent first fixed posts 104 not only manages and guides the wire layout in an orderly manner, preventing the wires from becoming messy or crossing, but also effectively avoids potential faults that may be caused by messy wires. Furthermore, placing the wires in the trough significantly reduces the risk of the wires being damaged by external mechanical forces, ensuring the stability and safety of current transmission, improving the overall reliability of the transformer, extending its service life, and ensuring that the transformer maintains efficient and stable performance during long-term operation.

[0037] Further, please refer to Figure 2 and Figure 3 A limiting plate 107 is provided on one side of the bottom of the first base plate 103, and a first positioning block 108 is provided on the other side of the bottom of the first base plate 103; a first limiting groove is provided on one side of the bottom of the second base plate 23, and a second positioning block 27 is provided at both ends of the other side of the bottom of the second base plate 23; the limiting plate 107 is connected to the first limiting groove, and the two ends of the first positioning block 108 abut against the two second positioning blocks 27 respectively.

[0038] In this embodiment, the limiting plate 107 and the first positioning block 108 are integrally formed with the first base plate 103, and the second positioning block 27 is integrally formed with the second base plate 23. Through the cooperation and connection between the limiting plate 107 and the first limiting groove, and the abutment between the first positioning block 108 and the two second positioning blocks 27, the positioning accuracy of the first base plate 103 and the second base plate 23 during connection is ensured, avoiding errors caused by inaccurate positioning. Furthermore, the first base plate 103 and the second base plate 23 can be firmly connected together, are not easy to loosen, and improve the stability of the entire structure.

[0039] Further, please refer to Figure 2 and Figure 3The top of the first top plate 102 is provided with two first limiting blocks 109, and the bottom of the first bottom plate 103 is provided with two second limiting blocks 110; the two first limiting blocks 109 and the two second limiting blocks 110 are respectively located at both ends of the second through groove 101; the first limiting blocks 109 are used to limit the movement position of the magnetic core 3 located at the top, and the second limiting blocks 110 are used to limit the movement position of the magnetic core 3 located at the bottom.

[0040] In this embodiment, the first limiting block 109 and the second limiting block 110 are integrally formed with the first top plate 102 and the first bottom plate 103, respectively. By setting two first limiting blocks 109 on the top of the first top plate 102 and two second limiting blocks 110 on the bottom of the first bottom plate 103, the movement position of the magnetic core 3 in the horizontal direction can be effectively limited, improving the reliability and durability of the entire structure. Furthermore, since the magnetic core 3 is constrained by the limiting blocks, the friction and collision between the magnetic core 3 and the surrounding structure are reduced, lowering the risk of wear and damage. At the same time, the presence of the first limiting block 109 and the second limiting block 110 also makes it easier to position and fix the magnetic core 3 during assembly and disassembly, improving work efficiency and convenience.

[0041] Further, please refer to Figure 4 The magnetic core 3 includes a U-shaped body 33, a central column 31 disposed in the inner middle of the U-shaped body 33, and a side column 32 disposed in the U-shaped body 33 and located on one side of the central column 31; a receiving groove is formed between the U-shaped bodies 33 of the two magnetic cores 3, and the skeleton structure part is located in the receiving groove.

[0042] In this embodiment, the central column 31 and the side column 32 are integrally formed with the U-shaped body 33; the receiving groove formed between the U-shaped bodies 33 of the two magnetic cores 3 can stably accommodate the skeleton structure, thereby enhancing the stability and reliability of the overall structure of the miniaturized transformer.

[0043] Further, please refer to Figure 4 The U-shaped main body 33 has a second limiting groove 34 on each side, and the second limiting groove 34 is located at both ends of the central column 31; the two second limiting grooves 34 are respectively connected to the two first limiting blocks 109 or the two second limiting blocks 110.

[0044] In this embodiment, the two second limiting slots 34 are respectively connected to the first limiting block 109 of the top magnetic core 3 or to the second limiting block 110 of the bottom magnetic core 3, which can ensure the precise positioning and stable connection between the components and avoid performance degradation or damage caused by loosening or misalignment. This not only improves the overall reliability and durability of the miniaturized transformer, but also simplifies the installation and disassembly process, making the operation more convenient and faster.

[0045] The present invention also provides a circuit board on which a miniaturized transformer as described above is disposed.

[0046] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A miniaturized transformer, characterized in that, The device includes a primary frame, a secondary frame, and two magnetic cores. A first through-slot is formed in the middle of the secondary frame, and the primary frame is disposed within this first through-slot, forming a frame structure with the secondary frame. The two magnetic cores are respectively disposed at the top and bottom of the frame structure. A second through-slot is formed in the middle of the primary frame, and a mounting groove is formed between the sidewall of the primary frame and one side wall of the first through-slot. Each magnetic core includes a central post and side posts; the central post is located within the second through-slot, and the side posts are located within the mounting groove.

2. A miniaturized transformer according to claim 1, characterized in that, The primary frame includes a first top plate, a first bottom plate, and a first winding post. The top of the first winding post is fixedly connected to the bottom of the first top plate, and the bottom of the first winding post is fixedly connected to the top of the first bottom plate. The first winding post is used to wind the primary coil. The first top plate is flush with the upper surface of the secondary frame, and the first bottom plate is flush with the lower surface of the secondary frame. The second through slot is located in the middle of the first winding post.

3. A miniaturized transformer according to claim 2, characterized in that, The secondary frame includes a second top plate, a second bottom plate, and a second winding post. The top of the second winding post is fixedly connected to the bottom of the second top plate, and the bottom of the second winding post is fixedly connected to the top of the second bottom plate. The second winding post is used to wind the secondary coil. The upper surface of the second top plate is flush with the upper surface of the first top plate, and the lower surface of the second bottom plate is flush with the lower surface of the first bottom plate. The first through slot is formed in the middle of the second winding post. The mounting groove is formed between one side wall of the first winding post and one side wall of the first through slot.

4. A miniaturized transformer according to claim 3, characterized in that, Three first fixing posts are provided on one side of the first base plate, and four first fixing posts are provided on the other side of the first base plate. First wiring pins are respectively connected to the outer side of the first fixing posts. Two second fixing posts are provided on one side of the second base plate. The two second fixing posts are respectively located at the two ends of the three first fixing posts. Second wiring pins are connected to the outer side of the second fixing posts.

5. A miniaturized transformer according to claim 4, characterized in that, A wire groove is formed between adjacent first fixed posts.

6. A miniaturized transformer according to claim 3, characterized in that, A limiting plate is provided on one side of the bottom of the first base plate, and a first positioning block is provided on the other side of the bottom of the first base plate; a first limiting groove is provided on one side of the bottom of the second base plate, and a second positioning block is provided at both ends of the other side of the bottom of the second base plate; the limiting plate is connected to the first limiting groove, and the two ends of the first positioning block abut against the two second positioning blocks respectively.

7. A miniaturized transformer according to claim 3, characterized in that, The top of the first top plate is provided with two first limiting blocks, and the bottom of the first bottom plate is provided with two second limiting blocks; the two first limiting blocks and the two second limiting blocks are respectively located at both ends of the second through slot; the first limiting blocks are used to limit the movement position of the magnetic core located at the top, and the second limiting blocks are used to limit the movement position of the magnetic core located at the bottom.

8. A miniaturized transformer according to claim 7, characterized in that, The magnetic core includes a U-shaped body, a central column is disposed in the inner middle of the U-shaped body, and a side column is disposed inside the U-shaped body and located on one side of the central column; a receiving groove is formed between the U-shaped bodies of the two magnetic cores, and the skeleton structure is located in the receiving groove.

9. A miniaturized transformer according to claim 8, characterized in that, The U-shaped main body is provided with a second limiting groove on each side, and the second limiting groove is located at both ends of the central column; the two second limiting grooves are respectively connected to the two first limiting blocks or the two second limiting blocks.

10. A circuit board, characterized in that, The circuit board is provided with a miniaturized transformer as described in any one of claims 1-9.

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