Buckle type framework suitable for annular common mode inductor

Abstract

The invention provides a buckle type framework suitable for an annular common mode inductor. The buckle type framework comprises a fan-shaped framework shell, a fan-shaped cover plate, a pin terminal, a wiring terminal and a wire harness. The contact pin terminal and the wiring terminal are assembled in the fan-shaped framework shell through a T-shaped groove, the fan-shaped cover plate is assembled on the fan-shaped framework shell through the cover plate terminal, the wire harnesses are connected with the contact pin terminal and the wiring terminal and are connected in a staggered mode, and the two ends of the contact pin terminal and the two ends of the wiring terminal are respectively provided with a leading-out wire which is connected with a PIN of the common mode inductor. The framework is assembled on the annular magnetic core through a buckle type structure, the magnetic core and the framework are bonded together through epoxy resin glue, mounting and dismounting are convenient, the framework is of a fan-shaped structure, and the size of the framework is smaller than that of a fully-wrapped magnetic core sleeve shell. Meanwhile, the defects that a traditional annular common-mode inductor can only be manually wound with a coil and is low in production efficiency are overcome, the magnetic core and the framework coil are assembled and disassembled, the magnetic core is convenient to replace, and the annular common-mode inductor has the advantages of being high in production efficiency, reliability and stability.

Description

Technical Field

[0001] The present application relates to the technical field of common-mode inductors, and in particular to a snap-on skeleton suitable for annular common-mode inductors. Background Art

[0002] As an important anti-electromagnetic interference device, common-mode inductors are widely used in many fields, including information communication, automotive electronics, and photovoltaic power generation. The rapid development of these fields provides a broad market prospect for common-mode inductors. At the same time, with the promotion of emerging technologies such as 5G communications and autonomous driving, electronic equipment is developing towards higher speed, smaller size, and higher efficiency. The demand for common-mode inductors will further increase, and the performance requirements for products will also become more stringent.

[0003] Ring-shaped common-mode inductors account for the majority of traditional common-mode inductors. Because the core of traditional common-mode inductors is a ring structure, it is difficult to automatically wind them. Most of them are wound manually, which is inefficient. Secondly, because the winding coil is directly wound on the core, it is affected by the winding stress, and the inductance of the common-mode inductor will be reduced, resulting in a decrease in the performance of the inductor.

[0004] Although the traditional bobbin shell can avoid the influence of winding stress, it increases the volume of the magnetic core and reduces the area of ​​the winding window due to the full coverage of the annular magnetic core. In addition, the winding principle has not changed and most of the winding is done manually. Therefore, in order to avoid the influence of winding stress, it is of great significance to develop a common mode inductor bobbin that is easy to assemble automatically and produce efficiently. Summary of the invention

[0005] The present application aims to solve the problem that the existing traditional skeleton shell can avoid the influence of winding stress, but due to the full coverage of the annular magnetic core, the volume of the magnetic core is increased, the area of ​​the winding window is reduced, and the winding principle is not changed, and most of the winding is done manually. A snap-on skeleton suitable for annular common-mode inductors is provided.

[0006] Including: including fan-shaped skeleton housing, pin terminals, wiring terminals, fan-shaped cover plate and wiring harness;

[0007] The fan-shaped skeleton shell has a pin portion and a wiring portion, a folding plate is provided between the pin portion and the wiring portion, one end of the folding plate is fixedly connected to the pin portion, and the other end is fixedly connected to the wiring portion;

[0008] The pin part and the wiring part are provided with grooves, the pin terminal is embedded in the groove of the pin part, and the wiring terminal is embedded in the groove of the wiring part;

[0009] The pin terminal is provided with a metal pin, the wiring terminal is provided with a wiring port, and the wiring harness is sequentially and staggeredly connected to the bottom of all the metal pins and the bottom of the wiring port;

[0010] One end of the wiring harness is close to the bottom of the metal pin and connected to the PIN pin position of the common mode inductor, and the other end of the wiring harness is close to the bottom of the wiring port and connected to the PIN pin position of the common mode inductor;

[0011] The fan-shaped cover plate covers the wiring harness and is embedded in the grooves of the pin portion and the wiring portion.

[0012] In a feasible implementation, the folding plate is a symmetrical structure, and the folding range of the folding plate is 0-180°.

[0013] In a feasible implementation, the fan-shaped skeleton shell is further provided with a T-shaped slot;

[0014] The number of the T-shaped slots is at least 6 and they are symmetrically arranged on the inner walls of the grooves of the pin portion and the wiring portion;

[0015] The pin terminal 2 and the wiring terminal 3 are both provided with T-shaped pins, the number and position of the T-shaped pins correspond to the T-shaped slots, and the T-shaped pins are slidably connected to the T-shaped slots.

[0016] In a feasible implementation, a trapezoidal connecting plate and a square connecting plate are provided on the fan-shaped skeleton shell;

[0017] The trapezoidal connecting plate and the square connecting plate are both arranged at the bottom of the grooves of the pin insertion part and the wiring part;

[0018] The trapezoidal connecting plate is arranged on a side of the pin insertion part and the wiring part close to the folding plate, and the square connecting plate is arranged on a side of the pin insertion part and the wiring part away from the folding plate;

[0019] The trapezoidal connecting plate and the square connecting plate are both provided with connecting holes;

[0020] The fan-shaped cover plate is provided with a cover plate terminal, the position of the cover plate terminal corresponds to the position of the connection hole, and the cover plate terminal is embedded in the connection hole.

[0021] In a feasible implementation, the thickness of the fan-shaped cover plate is 0.5-2 mm; the diameter of the cover plate terminal is 1 mm, and the length of the cover plate terminal is 1-2 mm;

[0022] The cover terminal is transitionally matched with the connecting hole.

[0023] In a feasible implementation, the fan-shaped cover plate is provided with two cover plate square corners and two cover plate trapezoidal corners;

[0024] The cover plate terminal is arranged on the square corner of the cover plate and the trapezoidal corner of the cover plate, and the position of the square corner of the cover plate is opposite to the position of the square connecting plate, and the trapezoidal corner of the cover plate is opposite to the trapezoidal connecting plate.

[0025] In a feasible implementation, the metal pin is loosely matched with the wiring port, a metal spring is provided at the bottom of the inner cavity of the wiring port, the metal spring is connected to the wiring harness, and when the metal pin is inserted into the wiring port, it contacts the metal spring.

[0026] In a feasible implementation, the pin portion is provided with a female buckle, and the wiring portion is provided with a male buckle;

[0027] One side of the buckle female buckle is fixed on the outer surface of the pin portion away from the folding plate, and the other side extends in a direction away from the pin portion;

[0028] The buckle male buckle is fixed on the outer surface of the wiring portion away from the folding plate and protrudes outward. The buckle male buckle is in the shape of an arc-shaped strip, and the top of the buckle male buckle is an inclined surface;

[0029] The buckle female buckle is provided with a through hole, the shape of the through hole is the same as that of the buckle male buckle, and is buckled with the buckle male buckle.

[0030] In a feasible implementation, the pin portion and the wiring portion are both provided with side openings;

[0031] The side openings are arranged on both sides of the pin portion and the wiring portion, and the combined size of the corresponding side openings on the pin portion and the wiring portion is larger than the cross-sectional size of the annular common mode inductor core.

[0032] In a feasible implementation, a wire opening is provided on each of the pin portion and the wiring portion;

[0033] The wire opening is a through hole, and the two ends of the wiring harness are connected to the PIN pin positions of the common mode inductor through the wire openings on the pin portion and the wiring portion respectively.

[0034] The beneficial effects of the present application are as follows: This scheme is applicable to the snap-on skeleton of the annular common-mode inductor, which is a fan-shaped structure in structure. The winding coil is inside the skeleton, and the wire is not in direct contact with the magnetic core, which reduces the influence of the winding stress on the common-mode inductor and has high reliability and stability. The snap-on skeleton of this scheme is assembled on the magnetic core through the snap-on structure, and the winding is assembled through the plug-in wiring harness. Compared with the traditional common-mode inductor production, which requires manual winding in circles, the plug-in wiring harness of this skeleton can be produced by the plug-in wiring harness manufacturer. The common-mode inductor manufacturer only needs to assemble the skeleton, wiring harness, and magnetic core, which greatly improves the production efficiency and avoids the rework caused by the manual winding number errors. The snap-on skeleton of this scheme facilitates the assembly and disassembly between the magnetic core and the skeleton through the snap-on structure. When the material of the magnetic core needs to be replaced, there is no need to remove the wires. Only the snap-on structure needs to be opened to separate the coil and the magnetic core, which is conducive to the research and development and production of common-mode inductors. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the implementation of the present invention, and together with the specification are used to explain the principles of the embodiments of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the implementation of the present invention, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0036] Figure 1 It is a structural schematic diagram of a snap-on skeleton suitable for a ring-shaped common-mode inductor shown in an exemplary embodiment of the present application;

[0037] Figure 2 It is a schematic diagram of a fan-shaped skeleton shell structure shown in an exemplary embodiment of the present application;

[0038] Figure 3 is a schematic diagram of the wiring structure of an exemplary embodiment of the present application;

[0039] Figure 4 is a schematic diagram of the pin structure of an exemplary embodiment of the present application;

[0040] Figure 5 It is a schematic diagram of a plug-in structure of a pin terminal and a wiring terminal shown in an exemplary embodiment of the present application;

[0041] Figure 6 is a schematic diagram of a fan-shaped cover plate structure shown in an exemplary embodiment of the present application;

[0042] Figure 7 is a schematic diagram of assembling a skeleton and a magnetic core according to an exemplary embodiment of the present application;

[0043] Figure 8It is a schematic diagram of the effect of a snap-on common-mode inductor shown in an exemplary embodiment of the present application.

[0044] Notes on the attached drawings:

[0045] 10-sector-shaped skeleton housing; 20-pin terminal; 30-wiring terminal; 40-sector-shaped cover; 50-wiring harness;

[0046] 11-pin part; 12-wiring part; 13-folding plate; 14-T-slot; 15-trapezoidal connecting plate; 16-square connecting plate; 17-side opening; 18-wire port; 21-metal pin; 22-T-pin; 31-wiring port; 41-cover terminal; 42-cover trapezoidal corner; 43-cover square corner;

[0047] 111- female snap buckle; 121- male snap buckle. DETAILED DESCRIPTION

[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the embodiments of the present invention will be more comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the implementation of the embodiments of the present invention.

[0049] Common-mode inductors, as an important anti-electromagnetic interference device, are widely used in many fields, including information communication, automotive electronics, and photovoltaic power generation. The rapid development of these fields provides a broad market prospect for common-mode inductors. Among traditional common-mode inductors, toroidal common-mode inductors account for the majority. Traditional common-mode inductors are difficult to wind automatically due to the toroidal structure of the magnetic core. Most of them are wound manually, which is inefficient. Secondly, since the winding coil is directly wound on the magnetic core, the inductance of the common-mode inductor will be reduced due to the influence of the winding stress, resulting in a decrease in the performance of the inductor. Although the traditional skeleton shell can avoid the influence of winding stress, it increases the volume of the magnetic core and reduces the area of ​​the winding window due to the full coverage of the toroidal magnetic core.

[0050] To solve the above problems, refer to Figure 1-Figure 8 As shown, the present application provides a snap-on skeleton suitable for a toroidal common-mode inductor, comprising: a fan-shaped skeleton shell 10, a pin terminal 20, a wiring terminal 30, a fan-shaped cover plate 40 and a wiring harness 50; the fan-shaped skeleton shell 10 has a pin portion 11 and a wiring portion 12, a folding plate 13 is provided between the pin portion 11 and the wiring portion 12, one end of the folding plate 13 is fixedly connected to the pin portion 11, and the other end is fixedly connected to the wiring portion 12.

[0051] The fan-shaped skeleton housing 10 is composed of a pin portion 11, a wiring portion 12, and a folding plate 13 connecting the two, maintaining the basic form of the annular common mode inductor, and at the same time, by introducing a fan-shaped structure, it can match the annular structure of the magnetic core. The design of the folding plate 13 enhances the overall stability of the skeleton and ensures a smooth connection between the pin portion 11 and the wiring portion 12.

[0052] Grooves are provided in the pin portion 11 and the wiring portion 12, the pin terminal 20 is embedded in the groove of the pin portion 11, and the wiring terminal 30 is embedded in the groove of the wiring portion 12; the pin terminal 20 is provided with a metal pin 21, and the wiring terminal 30 is provided with a wiring port 31, and the wiring harness 50 is alternately connected to the bottom of all the metal pins 21 and the bottom of the wiring port 31 in sequence; and one end of the wiring harness 50 is close to the bottom of the metal pin 21 and connected to the PIN pin position of the common mode inductor, and the other end of the wiring harness 50 is close to the bottom of the wiring port 31 and connected to the PIN pin position of the common mode inductor.

[0053] Specifically, the pin terminal 20 has a metal pin 23, the wiring terminal 30 has a wiring port 31, and the bottom of the metal pin 23 and the bottom of the wiring port 31 are connected through the wire in the harness 50. The number of the metal pins 23 and the wiring port 31 is equal, and the harness 5 is staggered between the pin terminal 2 and the wiring terminal 3, and there is a wire on each of the pin terminal 2 and the wiring terminal 3 to connect the PIN pin position of the common mode inductor. The number of wires in the harness 50 depends on the number of turns of the coil, and the wire material can be selected as enameled wire.

[0054] The fan-shaped cover plate 40 covers the wiring harness 50 and is embedded in the grooves of the pin portion 11 and the wiring portion 12. The fan-shaped cover plate 40 isolates the magnetic core and the wiring harness, thereby reducing the influence of the winding stress on the common mode inductance.

[0055] The snap-on skeleton suitable for the annular common-mode inductor of the present application effectively reduces the influence of winding stress on the inductor performance through the staggered connection of the wiring harness 50 and the protection of the fan-shaped cover 40, and does not need to fully cover the annular magnetic core, thereby maintaining a small volume and a large winding window area, optimizing space utilization, reducing the risk of inductance reduction, and ensuring the high performance of the product.

[0056] In some embodiments of the present application, the folding plate 13 is a symmetrical structure, and the folding range of the folding plate 13 is 0-180°. The folding plate 13 adopts a symmetrical design, so that the skeleton can achieve a flexible adjustment range of 0-180° when folded, thereby adapting to annular magnetic cores of different sizes and shapes, thereby improving the versatility and adaptability of the skeleton.

[0057] In some embodiments of the present application, a T-slot 14 is further provided on the fan-shaped skeleton housing 10; the number of the T-slots 14 is at least 6, and they are symmetrically arranged on the inner walls of the grooves of the pin portion 11 and the wiring portion 12; the pin terminal 20 and the wiring terminal 30 are both provided with T-pins 22, the number and position of the T-pins 22 correspond to the T-slots 14, and the T-pins 22 are slidably connected to the T-slots 14.

[0058] The T-slots 14 are symmetrically arranged on the inner walls of the grooves of the pin portion 11 and the wiring portion 12, and the number is at least 6, ensuring that the pin terminals 20 and the wiring terminals 30 are stably fixed on the fan-shaped skeleton housing 10. The number and position of the T-shaped pins 22 correspond to the T-slots 14 one by one. The design of the T-slots 14 enables the T-shaped pins 22 to slide along the grooves, simplifying the assembly process and providing additional fixing force, ensuring that the pin terminals 20 and the wiring terminals 30 can be accurately installed on the fan-shaped skeleton housing 10.

[0059] In some embodiments of the present application, a trapezoidal connecting plate 15 and a square connecting plate 16 are provided on the fan-shaped skeleton shell 10; the trapezoidal connecting plate 15 and the square connecting plate 16 are both arranged at the bottom of the grooves of the pin portion 11 and the wiring portion 12; the trapezoidal connecting plate 15 is arranged on the side of the pin portion 11 and the wiring portion 12 close to the folding plate 13, and the square connecting plate 16 is arranged on the side of the pin portion 11 and the wiring portion 12 away from the folding plate 13; the trapezoidal connecting plate 15 and the square connecting plate 16 are both provided with connecting holes; a cover terminal 41 is provided on the fan-shaped cover plate 40, the position of the cover terminal 41 corresponds to the position of the connecting hole, and the cover terminal 41 is embedded in the connecting hole.

[0060] The trapezoidal connecting plate 15 and the square connecting plate 16 are arranged at the bottom of the grooves of the pin portion 11 and the wiring portion 12, and fit the groove structure to provide additional structural support. At the same time, the connecting holes on the trapezoidal connecting plate 15 and the square connecting plate 16 are used for fixed connection with the cover terminal 41, which enhances the connection stability between the frame and the fan-shaped cover 40.

[0061] In this embodiment, the introduction of the trapezoidal connecting plate 15 and the square connecting plate 16 enhances the overall structural strength of the fan-shaped skeleton housing 10, making the skeleton more stable when subjected to external stress, and improving the durability and reliability of the inductor. The cover terminal 41 is fixedly connected to the connection holes on the trapezoidal connecting plate 15 and the square connecting plate 16, ensuring the connection stability between the fan-shaped cover plate 40 and the skeleton, and preventing the degradation of electrical performance due to looseness. The cooperation between the cover terminal 41 and the connection hole not only provides a stable mechanical connection, but also ensures a good electrical connection, thereby improving the electrical performance of the inductor.

[0062] In some embodiments of the present application, the thickness of the fan-shaped cover plate 40 is 0.5-2 mm; the selection of this range not only ensures that the cover plate has sufficient structural strength, but also avoids assembly difficulties and increased costs caused by excessive thickness. The diameter of the cover plate terminal 41 is 1 mm, and the length of the cover plate terminal 41 is 1-2 mm. This size ensures that the cover plate terminal 41 can be fully inserted into the connection hole to form a stable connection, and avoids assembly difficulties and space waste caused by excessive length.

[0063] Furthermore, the cover terminal 41 and the connection hole are transitionally matched, with a certain tightness to prevent loosening, while allowing a certain assembly tolerance, thereby achieving tightness and flexibility of assembly.

[0064] In some embodiments of the present application, two cover square corners 43 and two cover trapezoidal corners 42 are provided on the fan-shaped cover plate 40; the cover plate terminal 41 is provided on the cover plate square corner 43 and the cover plate trapezoidal corner 42, and the position of the cover plate square corner 43 is opposite to the position of the square connecting plate 16, and the cover plate trapezoidal corner 42 is opposite to the trapezoidal connecting plate 15.

[0065] Specifically, the cover plate square corner 43 and the cover plate trapezoidal corner 44 are arranged at corresponding positions of the fan-shaped cover plate 40, respectively opposite to the square connecting plate 16 and the trapezoidal connecting plate 15 on the fan-shaped skeleton shell 10. This design ensures that a tight and stable connection can be formed between the cover plate square corner 43 and the square connecting plate 16, and between the cover plate trapezoidal corner 44 and the trapezoidal connecting plate 15. Additional structural support is provided, and the overall strength of the fan-shaped cover plate 40 is enhanced.

[0066] In some embodiments of the present application, the metal pin 21 is loosely matched with the wiring port 31 , a metal spring is provided at the bottom of the inner cavity of the wiring port 31 , and the metal spring is connected to the wiring harness 5 . When the metal pin 21 is inserted into the wiring port 31 , it contacts the metal spring.

[0067] When the frame is closed, the metal pin 21 forms a stable and reliable electrical contact with the metal spring in the wiring port 31, and the wiring port 31 is used to receive the metal pin 21. The metal pin 21 is usually made of a metal with good electrical conductivity, such as copper or tinned copper alloy, to ensure good electrical conductivity and corrosion resistance. The clearance fit between the metal pin 21 and the wiring port 31 ensures the smoothness and accuracy of the insertion process, while avoiding damage caused by excessive friction or extrusion.

[0068] The metal spring has elasticity and conductivity. When the metal pin 21 is inserted, it can provide sufficient pressure to ensure good contact between the two. At the same time, the elasticity of the metal spring can also compensate for the dimensional changes caused by manufacturing tolerance or thermal expansion to a certain extent. At the same time, the wire harness 5 is connected to the metal spring to form an electrical path, and the connection method can be welding, crimping or other electrical connection methods.

[0069] The clearance fit design of the metal pin 21 and the wiring port 31 in the embodiment of the present application, as well as the supporting effect of the metal spring sheet, enhances the structural strength of the electrical connection, enabling it to withstand greater mechanical stress and vibration. At the same time, the clearance fit design simplifies the assembly process, reduces assembly cost and time, and improves production efficiency.

[0070] In some embodiments of the present application, a female snap-on buckle 111 is provided on the pin portion 11, and a male snap-on buckle 121 is provided on the wiring portion 12; one side of the female snap-on buckle 111 is fixed on the outer surface of the pin portion 11 away from the folding plate 11, and the other side extends in a direction away from the pin portion 11; the male snap-on buckle 121 is fixed on the outer surface of the wiring portion 12 away from the folding plate 13, protrudes outward, and has an arc-shaped long strip shape, and the top of the male snap-on buckle 121 is an inclined surface; a through hole is provided on the female snap-on buckle 111, and the shape of the through hole is the same as that of the male snap-on buckle 121, and is snap-connected with the male snap-on buckle 121.

[0071] Through the precise snap connection between the female snap buckle 111 and the male snap buckle 121, a stable connection between the pin portion 11 and the wiring portion 12 is achieved, avoiding loosening or disconnection of the connection due to vibration or external impact. The top of the male snap buckle 121 is an inclined surface, which is conducive to the matching of the female snap buckle 111. The design of the snap connection simplifies the assembly process. No additional fasteners or tools are required. The male snap buckle 121 only needs to be inserted into the through hole of the female snap buckle 111. The connection can be completed by simply pressing, which improves the assembly efficiency. In this embodiment, the width of the inclined surface can be half the width of the male snap buckle 121, and the male buckle width can be 2mm-4mm.

[0072] In some embodiments of the present application, side openings 17 are provided on both the pin portion 11 and the wiring portion 12; the side openings 17 are provided on both sides of the pin portion 11 and the wiring portion 12, and the combined size of the corresponding side openings 17 on the pin portion 11 and the wiring portion 12 is larger than the cross-sectional size of the annular common mode inductor core.

[0073] Since the pin portion 11 and the wiring portion 12 are provided with side openings 17, the annular common mode inductor core can be easily passed through these openings and fixed in place. This design not only simplifies the installation process, but also improves the stability and reliability of the electrical components. At the same time, the design of the side openings 17 is not only convenient for installation, but also ensures a stable connection between the annular common mode inductor core and the pin portion 11 and the wiring portion 12. Through the reasonable opening size and shape design, it can be ensured that the annular common mode inductor core will not loosen or fall off after installation, thereby ensuring the stability of the overall structure.

[0074] Conventional electrical connection devices usually require complicated operation steps and additional tools when installing the toroidal common mode inductor core, which not only increases the installation cost but also reduces production efficiency. By designing the side opening 17, the installation process can be significantly simplified. No additional tools or complicated operation steps are required. The toroidal common mode inductor core only needs to be inserted through the side opening 17, which greatly improves the convenience of installation.

[0075] In some embodiments of the present application, a wire opening 18 is provided on both the pin portion 11 and the wiring portion 12; the wire opening 18 is a through hole, and the two ends of the wiring harness 50 are connected to the PIN pin positions of the common-mode inductor through the wire openings 18 on the pin portion 11 and the wiring portion 12 respectively.

[0076] By designing the wire port 18, the direction of the wiring harness 50 can be accurately guided, which simplifies the wiring harness management, reduces the design complexity and cost, and at the same time ensures that the two ends of the wiring harness 50 can be accurately connected to the PIN pin position of the common mode inductor, thereby improving the accuracy and reliability of the connection.

[0077] It can be seen from the above content that the present application provides a snap-on skeleton suitable for annular common-mode inductors, including a fan-shaped skeleton shell, a fan-shaped cover plate, a pin terminal, a wiring terminal and a wiring harness. The pin terminal and the wiring terminal are assembled in the fan-shaped skeleton shell through a T-slot, the fan-shaped cover plate is assembled on the fan-shaped skeleton shell through the cover plate terminal, the wiring harness connects the pin terminal and the wiring terminal, and through the staggered connection, there is a lead wire at both ends of the pin terminal and the wiring terminal, which connects the PIN pin of the common-mode inductor. Then, through the snap-on structure, the skeleton is assembled on the annular magnetic core, and the magnetic core and the skeleton are bonded together with epoxy resin glue, which is convenient for installation and disassembly. At the same time, the skeleton is a fan-shaped structure, which is smaller in size compared to the full-enclosed magnetic core shell. Conventional common-mode inductors can be equipped with two skeletons.

[0078] In this solution, the skeleton is assembled on the magnetic core through a snap-on structure. The skeleton has a pluggable winding coil composed of a pin terminal, a wiring terminal and a wiring harness. When the magnetic core and the skeleton are assembled, the winding coil is connected through the wiring terminal to form a current loop. It breaks the disadvantage that the traditional annular common-mode inductor can only be wound manually and has low production efficiency; it solves the problem that the traditional annular common-mode inductor coil is wound on the surface of the magnetic core and is affected by the winding stress, resulting in reduced common-mode inductance; the wiring harness is placed inside the skeleton to better protect the winding coil and reduce the possibility of coil damage caused by external forces such as collisions; at the same time, it is convenient for assembly and disassembly between the magnetic core and the skeleton coil, and it is convenient to replace the material of the magnetic core. The snap-on skeleton of the present invention has the characteristics of high production efficiency, high reliability and high stability.

[0079] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the disclosure of the specification and the examples. This application is intended to cover any modifications, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure.

Claims

1. A snap-on frame for a toroidal common mode inductor, characterized in that: include: It comprises a fan-shaped skeleton housing (10), a pin terminal (20), a wiring terminal (30), a fan-shaped cover plate (40) and a wiring harness (50); The fan-shaped skeleton housing (10) comprises a pin insertion portion (11) and a wiring portion (12), a folding plate (13) is provided between the pin insertion portion (11) and the wiring portion (12), one end of the folding plate (13) is fixedly connected to the pin insertion portion (11), and the other end is fixedly connected to the wiring portion (12); The pin portion (11) and the wiring portion (12) are provided with grooves, the pin terminal (20) is embedded in the groove of the pin portion (11), and the wiring terminal (30) is embedded in the groove of the wiring portion (12); The pin terminal (20) is provided with a metal pin (21), the wiring terminal (30) is provided with a wiring port (31), and the wiring harness (50) sequentially and alternately connects the bottom of all the metal pins (21) and the bottom of the wiring port (31); One end of the wiring harness (50) is close to the bottom of the metal pin (21) and connected to the PIN pin position of the common mode inductor, and the other end of the wiring harness (50) is close to the bottom of the wiring port (31) and connected to the PIN pin position of the common mode inductor; The fan-shaped cover plate (40) covers the wiring harness (50) and is embedded in the grooves of the pin portion (11) and the wiring portion (12).

2. The snap-on frame for a toroidal common mode inductor according to claim 1, characterized in that: The folding plate (13) has a symmetrical structure, and the folding range of the folding plate (13) is 0-180°.

3. The snap-on frame for a toroidal common mode inductor according to claim 1, characterized in that: The fan-shaped skeleton shell (10) is also provided with a T-shaped groove (14); The number of the T-shaped slots (14) is at least 6, and they are symmetrically arranged on the inner walls of the grooves of the pin insertion portion (11) and the wiring portion (12); The pin terminal (20) and the wiring terminal (30) are both provided with T-shaped pins (22), the number and position of the T-shaped pins (22) correspond to the T-shaped slots (14), and the T-shaped pins (22) are slidably connected to the T-shaped slots (14).

4. The snap-on frame for a toroidal common mode inductor according to claim 1, characterized in that: The fan-shaped skeleton shell (10) is provided with a trapezoidal connecting plate (15) and a square connecting plate (16); The trapezoidal connecting plate (15) and the square connecting plate (16) are both arranged at the bottom of the grooves of the pin insertion part (11) and the wiring part (12); The trapezoidal connecting plate (15) is arranged on a side of the pin insertion portion (11) and the wiring portion (12) close to the folding plate (13), and the square connecting plate (16) is arranged on a side of the pin insertion portion (11) and the wiring portion (12) away from the folding plate (13); The trapezoidal connecting plate (15) and the square connecting plate (16) are both provided with connecting holes; The fan-shaped cover plate (40) is provided with a cover plate terminal (41), the position of the cover plate terminal (41) corresponds to the position of the connection hole, and the cover plate terminal (41) is embedded in the connection hole.

5. The snap-on frame for a toroidal common mode inductor according to claim 4, characterized in that: The thickness of the fan-shaped cover plate (40) is 0.5-2 mm; the diameter of the cover plate terminal (41) is 1 mm; and the length of the cover plate terminal (41) is 1-2 mm; The cover plate terminal (41) is transitionally matched with the connection hole.

6. The snap-on frame for a toroidal common mode inductor according to claim 5, characterized in that: The fan-shaped cover plate (40) is provided with two cover plate square corners (43) and two cover plate trapezoidal corners (42); The cover plate terminal (41) is arranged on the cover plate square corner (43) and the cover plate trapezoidal corner (42), and the position of the cover plate square corner (43) is opposite to the position of the square connecting plate (16), and the cover plate trapezoidal corner (42) is opposite to the trapezoidal connecting plate (15).

7. The snap-on frame for a toroidal common mode inductor according to claim 1, characterized in that: The metal plug pin (21) is loosely matched with the wiring port (31); a metal spring is provided at the bottom of the inner cavity of the wiring port (31); the metal spring is connected to the wiring harness (5); when the metal plug pin (21) is inserted into the wiring port (31), it contacts the metal spring.

8. The snap-on frame for a toroidal common mode inductor according to claim 1, characterized in that: The pin insertion portion (11) is provided with a female buckle (111), and the wiring portion (12) is provided with a male buckle (121); One side of the buckle female buckle (111) is fixed to the outer surface of the insertion pin portion (11) away from the folding plate (11), and the other side extends in a direction away from the insertion pin portion (11); The buckle male buckle (121) is fixed on the outer surface of the wiring portion (12) away from the folding plate (13) and protrudes outwards. The buckle male buckle (121) is in the shape of an arc-shaped long strip, and the top of the buckle male buckle (121) is an inclined surface. The buckle female buckle (111) is provided with a through hole, the shape of the through hole is the same as that of the buckle male buckle (121), and is buckled with the buckle male buckle (121).

9. The snap-on frame for a toroidal common mode inductor according to claim 1, characterized in that: The pin insertion portion (11) and the wiring portion (12) are both provided with side openings (17); The side openings (17) are arranged on both sides of the pin portion (11) and the wiring portion (12); the combined size of the corresponding side openings (17) on the pin portion (11) and the wiring portion (12) is greater than the cross-sectional size of the annular common mode inductor core.

10. The snap-on frame for a toroidal common mode inductor according to claim 1, characterized in that: The pin insertion portion (11) and the wiring portion (12) are each provided with a wire opening (18); The wire opening (18) is a through hole, and the two ends of the wiring harness (50) are connected to the PIN pin positions of the common mode inductor through the wire openings (18) on the pin portion (11) and the wiring portion (12), respectively.

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