Plastic package type driver transformer and electronic equipment

Abstract

The invention relates to the technical field of magnetic devices, and discloses a plastic package type driver transformer and electronic equipment, and the plastic package type driver transformer comprises an integrated skeleton, and a plurality of metal terminals are arranged at the bottom end of the integrated skeleton; the winding coil is wound on the integrated framework, lead wire connectors corresponding to the metal terminals in a one-to-one mode are led out from the winding coil, and the lead wire connectors are electrically connected with the metal terminals; the first magnetic core is arranged in the integrated framework and is coated by the integrated framework; the first magnetic core is arranged at the top end of the integrated framework, the second magnetic core is arranged at the top end of the integrated framework, an adjustable external gap is kept between the second magnetic core and the winding coil, and the two ends of the first magnetic core extend towards the top end of the integrated framework and are fixedly connected with the second magnetic core after protruding out of the integrated framework, so that a closed magnetic circuit is formed. The magnetic core strength and the safety distance of the device are enhanced, and the reliability of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic devices, and in particular to a plastic-encapsulated drive transformer and electronic equipment. Background Art

[0002] As an important electromagnetic component in electronic circuits, drive transformers are widely used in power conversion, signal transmission and isolation circuits. The current mainstream drive transformers are usually assembled from components such as skeletons, cores, and wire wraps through multiple processes. Their overall performance and structural stability depend to a large extent on the precision and assembly process of each component. Since the core is usually assembled after winding in the prior art, this subsequent assembly method requires additional processing steps, which not only increases the complexity of the production process, but also increases the process cost. In addition, since the core needs to be assembled into the skeleton by external force, this method is prone to cause mechanical stress concentration of the core, resulting in cracking or damage of the core, especially in high-frequency and high-power application scenarios. As the industry's requirements for electronic component safety specifications (safety regulations) continue to increase, existing drive transformers often need to design baffles on the skeleton or add additional insulating sheets to improve insulation performance. However, while optimizing electrical performance, this method also increases the design difficulty, increases the overall volume of the transformer, and affects the miniaturization process of components. The above situations need to be changed. Summary of the invention

[0003] In view of this, the present application provides a plastic-encapsulated drive transformer and an electronic device to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to the first aspect, the technical solution adopted is:

[0005] A plastic-encapsulated drive transformer, comprising:

[0006] An integrated frame, wherein a plurality of metal terminals are arranged at the bottom end of the integrated frame;

[0007] A winding coil, wherein the winding coil is wound on the integrated frame, and the winding coil is led out with a lead connector corresponding to the metal terminal one by one, and the lead connector is electrically connected to the metal terminal;

[0008] A first magnetic core, wherein the first magnetic core is disposed in the integrated frame and is covered by the integrated frame;

[0009] The second magnetic core is arranged at the top of the one-piece frame and maintains an adjustable external gap with the winding coil, and both ends of the first magnetic core extend toward the top of the one-piece frame and are fixedly connected to the second magnetic core after protruding from the one-piece frame to form a closed magnetic circuit.

[0010] The present application is further configured as follows: the first magnetic core and the integrated skeleton are integrally injection molded.

[0011] The present application is further configured as follows: the one-piece skeleton includes a winding portion and an end plate portion, the end plate portion is integrally connected to two ends of the winding portion, the winding wire package is wound around the winding portion, and the metal terminal is connected to the end plate portion.

[0012] The present application is further configured as follows: the first magnetic core is connected within the integrated skeleton and communicates with the winding portion and the end plate portion.

[0013] The present application is further configured as follows: two ends of the first magnetic core have relatively arranged adjustment parts, the adjustment parts protrude from the end plate part toward the top end of the integrated skeleton, and the adjustment parts are fixedly connected to the second magnetic core.

[0014] The present application is further configured as follows: a vertical height of the adjustment portion relative to the end plate portion ≥ the adjustable external gap.

[0015] The present application is further configured as follows: the second magnetic core is configured in a rectangular structure, and the second magnetic core has a set thickness, and the set thickness is ≥0.5 mm.

[0016] The present application is further configured as follows: the first magnetic core and the second magnetic core structurally include at least one of a UU-type magnetic core, an EP-type magnetic core, an ER-type magnetic core or an EF-type magnetic core; and / or

[0017] The one-piece frame is made of at least one material selected from the group consisting of PPS, Bakelite and PA; and / or

[0018] The thickness of the insulation layer of the one-piece skeleton is ≥0.1 mm.

[0019] The present application is further configured as follows: the metal terminal is embedded in a side of the end plate portion facing away from the second magnetic core, and includes a first connecting pin and a second connecting pin protruding from the end plate portion, a parallel interval is maintained between the first connecting pin and the second connecting pin, the lead connector is electrically connected to the first connecting pin, and the second connecting pin is externally connected to an external device.

[0020] According to the second aspect, the technical solution adopted is:

[0021] An electronic device comprises the plastic-encapsulated drive transformer described in any one of the above items.

[0022] In summary, compared with the prior art, the present application discloses a plastic-encapsulated drive transformer and an electronic device. The plastic-encapsulated drive transformer includes an integrated frame, a winding wire package, a first magnetic core and a second magnetic core. A plurality of metal terminals are arranged at the bottom end of the integrated frame. The winding wire package is wound on the integrated frame, and the winding wire package is led out with lead connectors corresponding to the metal terminals one by one. The lead connectors are electrically connected to the metal terminals. The first magnetic core is arranged in the integrated frame and is covered by the integrated frame. The second magnetic core is arranged at the top of the integrated frame and maintains an adjustable external gap with the integrated frame and the winding wire package. The two ends of the first magnetic core extend toward the top of the integrated frame and are fixedly connected to the second magnetic core after protruding from the integrated frame to form a closed magnetic circuit. That is, through the above-mentioned arrangement, the magnetic core strength and safety distance of the device are enhanced, and the reliability of the device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a schematic diagram of the three-dimensional structure of a plastic-encapsulated drive transformer according to an embodiment of the present application;

[0025] Figure 2 is a front view structural schematic diagram of a plastic-encapsulated drive transformer according to an embodiment of the present application;

[0026] Figure 3 It is a partial structural schematic diagram of a plastic-encapsulated drive transformer according to an embodiment of the present application;

[0027] Figure 4 It is a cross-sectional view of the internal structure of the plastic-encapsulated drive transformer of an embodiment of the present application. DETAILED DESCRIPTION

[0028] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0029] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0030] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application, and have no specific meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0032] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] The technical solutions shown in this application will be described in detail below through specific embodiments. It should be noted that the description order of the following embodiments is not intended to limit the priority order of the embodiments.

[0034] Please refer to Figures 1 to 4 The plastic-encapsulated drive transformer of the embodiment of the present application includes an integrated frame 1, a winding wire package 3, a first magnetic core 4 and a second magnetic core 5.

[0035] During the specific implementation process, a plurality of metal terminals 2 are arranged at the bottom end of the integrated skeleton 1, the winding coil 3 is wound on the integrated skeleton 1, and the winding coil 3 is led out with a lead connector corresponding to the metal terminal 2 one by one, and the lead connector is electrically connected to the metal terminal 2, the first magnetic core 4 is arranged in the integrated skeleton 1 and is covered by the integrated skeleton 1, the second magnetic core 5 is arranged at the top of the integrated skeleton 1, and maintains an adjustable external gap with the winding coil 3, and the two ends of the first magnetic core 4 extend toward the top of the integrated skeleton 1, and the two ends of the first magnetic core 4 are fixedly connected to the second magnetic core 5 after protruding from the integrated skeleton 1 to form a closed magnetic circuit.

[0036] The plastic-encapsulated drive transformer optimizes the electrical connection path of the device by arranging a plurality of metal terminals 2 at the bottom end of the integrated frame 1, reduces the lead joint length and electrical impedance of the winding coil 3, and thus reduces circuit energy consumption.

[0037] The lead connector of the winding wire package 3 can be wound around the metal terminal 2 and then welded by tinning, thereby achieving electrical connection between the lead connector and the metal terminal 2 .

[0038] In addition, the first magnetic core 4 is arranged inside the integrated skeleton 1 and is coated by the plastic packaging structure of the integrated skeleton 1 to form a compact and stable magnetic circuit structure. The coating design of the integrated skeleton 1 can effectively reduce the mechanical stress of the environment on the magnetic core while improving the structural strength of the magnetic core, thereby reducing the risk of cracking or damage of the magnetic core caused by stress. At the same time, the integrated skeleton 1 can also isolate the external moisture and dust from eroding the magnetic core, thereby improving the environmental adaptability and service life of the device.

[0039] In addition, the second magnetic core 5 is arranged at the top of the integrated skeleton 1 and maintains an adjustable external gap with the winding coil 3. This adjustable external gap design allows the air gap length of the device magnetic circuit to be flexibly adjusted according to specific application requirements to optimize magnetic performance indicators, such as magnetic flux density and induction intensity. At the same time, both ends of the first magnetic core 4 extend toward the top of the integrated skeleton 1, and are fixedly connected to the second magnetic core 5 after protruding from the integrated skeleton 1, thereby forming a stable and continuous magnetic circuit, further improving the magnetic coupling efficiency of the device. That is, the external structural design of the second magnetic core 5 can reduce the overall board area of ​​the device product while increasing the safety distance of the product, thereby meeting the miniaturization process of the device.

[0040] Then, in the plastic-encapsulated drive transformer of the embodiment of the present application, the integrated skeleton 1 can not only effectively reduce the mechanical stress concentration caused by assembly of the magnetic core by covering the first magnetic core 4, but also prevent the magnetic core from being damaged by external force impact during transportation or use, greatly improving the structural stability and reliability of the transformer, and the integrated skeleton 1 reduces the additional insulating sheet and baffle structure, while optimizing the space utilization of the magnetic core and the skeleton, so that the overall volume of the transformer is reduced, which helps to meet the development needs of increasingly miniaturized electronic equipment, and the first magnetic core 4 is directly covered in the skeleton 1 without the need for additional assembly steps, thereby significantly reducing the complexity of the production process and improving manufacturing efficiency. At the same time, the first magnetic core 4 and the second magnetic core 5 are fixedly connected to form a stable magnetic circuit, reducing the magnetic flux leakage loss, thereby improving the electromagnetic conversion efficiency of the transformer, and the adjustable external gap design between the second magnetic core 5 and the winding coil 3 allows the air gap length to be flexibly adjusted according to application requirements. By optimizing the air gap length, the magnetic properties can be adjusted according to different operating frequencies and power requirements, thereby achieving higher design flexibility and adaptability.

[0041] It should be noted that the first magnetic core 4 and the second magnetic core 5 can be fixed by glue bonding. The first magnetic core 4 and the second magnetic core 5 are fixed by glue bonding. While ensuring the fixing strength, it can reduce the stress concentration problem that may be caused by the mechanical connection, and further improve the stability and durability of the overall structure. In addition, glue bonding can also achieve better airtightness and avoid the influence of external environmental factors (such as moisture and dust) on the joints of the magnetic cores, thereby extending the service life of the device and improving working reliability.

[0042] Preferably, the first magnetic core 4 and the integrated skeleton 1 are integrally injection molded to directly embed the first magnetic core 4 into the integrated skeleton 1 so that it is covered by the integrated skeleton 1. The integral injection molding process not only simplifies the production process and reduces the complexity of assembly, but also can effectively prevent the magnetic core from being damaged due to mechanical stress during subsequent assembly. At the same time, the integral injection molding also provides excellent insulation protection to prevent the erosion of the magnetic core by external moisture, dust and corrosive substances, thereby improving the environmental adaptability of the product. In addition, the close combination between the integrated skeleton 1 and the first magnetic core 4 can reduce the risk of looseness and vibration, and further enhance the overall stability and durability of the structure, thereby meeting the needs of high-reliability applications.

[0043] In the specific implementation process, the integrated frame 1 includes a winding part 11 and an end plate part 12 . The end plate part 12 is integrally connected to both ends of the winding part 11 . The winding wire package 3 is wound around the winding part 11 . The metal terminal 2 is connected to the end plate part 12 .

[0044] The winding part 11 and the end plate part 12 are connected by an integrated molding process to ensure the stability and processing accuracy of the overall structure of the skeleton. The winding part 11 is used to carry the winding wire package 3. The winding wire package 3 can be evenly wound on the winding part 11 according to a preset winding method, thereby realizing efficient electromagnetic energy conversion. The end plate part 12 is located at both ends of the winding part 11. As a supporting structure, it provides a fixed point for the winding part 11 and improves the overall mechanical strength. The metal terminal 2 is arranged on the end plate part 12 and is tightly connected thereto. Then the end plate part 12 not only provides a stable installation position for the metal terminal 2, but also ensures the electrical connection between the metal terminal and the lead connector of the winding wire package 3. Such a structural design optimizes the arrangement of the winding, simplifies the electrical connection path, and improves the reliability and efficiency of the device connection. At the same time, the end plate part 12 can also play a certain isolation and protection role to prevent external factors from affecting the metal terminal 2 and the winding wire package 3, thereby improving the durability and service life of the product.

[0045] Preferably, the metal terminal 2 is embedded in a side of the end plate portion 12 facing away from the second magnetic core 5, and includes a first connecting pin 21 and a second connecting pin 22 protruding from the end plate portion 12, and a parallel interval is maintained between the first connecting pin 21 and the second connecting pin 22, the lead connector is electrically connected to the first connecting pin 21, and the second connecting pin 22 is externally connected to an external device.

[0046] That is, the metal terminal 2 is embedded in the side of the end plate 12 away from the second magnetic core 5, so as to ensure the stability of the electrical connection while optimizing the compactness of the overall structure. A parallel interval is maintained between the first connecting pin 21 and the second connecting pin 22, thereby effectively reducing the possibility of electromagnetic interference and signal coupling. The second connecting pin 22 is used to connect to an external device to provide an interface for the input or output of the device to achieve functional expansion. Then, the metal terminal 2 can not only achieve reliable connection in a limited space, but also improve the electrical performance of the overall structure. For example, the parallel interval design can optimize the electrical insulation performance and prevent the occurrence of short circuit or interference problems. At the same time, the protruding structure design of the metal terminal 2 helps to simplify the installation process and improve the efficiency of the device in the actual assembly process. In addition, since the metal terminal 2 is embedded in one side of the end plate 12, the stability of its installation position is enhanced, thereby further improving the long-term reliability and environmental adaptability of the device.

[0047] In this embodiment, the first magnetic core 4 is connected to and communicates with the winding portion 11 and the end plate portion 12 in the integrated skeleton 1. Specifically, the first magnetic core 4 is arranged to pass through the integrated skeleton 1 and is directly adjacent to the winding portion 11, thereby providing a reliable magnetic field guiding function and improving the electromagnetic conversion efficiency of the winding coil 3. At the same time, the end of the first magnetic core 4 is connected to the end plate portion 12 by structural fixing or wrapping connection, so that the mechanical strength of the integrated skeleton 1 is further enhanced, and the problem of magnetic core displacement or loosening caused by external vibration or impact is avoided. On the basis of ensuring the magnetic circuit performance, the overall rigidity of the integrated skeleton 1 is improved, and the long-term reliability of the transformer is enhanced. In addition, through the connecting effect of the first magnetic core 4, the structure between the winding portion 11 and the end plate portion 12 is integrated, which further reduces the assembly steps between independent components, thereby simplifying the production process, improving manufacturing efficiency, and reducing product costs.

[0048] During the specific implementation process, the two ends of the first magnetic core 4 have relatively arranged adjustment parts 41, the adjustment parts 41 protrude from the end plate part 12 toward the top of the integrated skeleton 1, and the adjustment parts 41 are fixedly connected to the second magnetic core 5, so as to maintain an adjustable external gap between the second magnetic core 5 and the winding coil 3.

[0049] The adjustment part 41 is precisely designed in structure and size so that it can be reliably connected to the second magnetic core 5, and also allows the user to adjust the relative position of the second magnetic core 5 according to specific needs, thereby changing the air gap length between the second magnetic core 5 and the winding coil 3. The structural design of this adjustable external gap provides flexibility for optimizing magnetic properties. For example, by adjusting the air gap length, the magnetic resistance of the magnetic circuit can be controlled, thereby accurately adjusting the magnetic flux density and other key parameters of the device to adapt to application scenarios with different frequencies and powers.

[0050] In addition, the protruding design of the adjustment part 41 not only ensures a stable connection between the first magnetic core 4 and the second magnetic core 5, but also avoids the degradation of magnetic circuit performance due to core offset or poor contact. The design of the adjustment part 41 is combined with the structural characteristics of the integrated skeleton 1, so that the entire component has excellent mechanical strength and reliability while improving the magnetic properties. That is, through the fixed connection structure between the adjustment part 41 and the second magnetic core 5, not only can the needs of magnetic performance optimization be met, but also the adaptability of the device in different working environments is significantly improved, providing technical support for its wide application in multiple scenarios.

[0051] In one embodiment, the first magnetic core 4 is designed to be U-shaped.

[0052] Optionally, the adjusting portion 41 may be in a rectangular structure and vertically protrude from the end plate portion 12 .

[0053] In this embodiment, the vertical height of the adjustment portion 41 relative to the end plate portion 12 is set to H, and the adjustable external gap maintained between the second magnetic core 5 and the winding coil 3 is J, then H≥J; thus, by setting H≥J, the adjustment portion 41 can provide sufficient height support while reserving sufficient adjustable air gap space between the second magnetic core 5 and the winding coil 3. Specifically, the adjustment portion 41 can provide a stable support foundation for the second magnetic core 5 to avoid the core shaking or unstable connection caused by excessive air gap adjustment range. This design can also prevent the outer layer of the winding coil 3 from accidentally contacting the second magnetic core 5, ensuring insulation safety and safety distance, and H≥J can meet the adjustment requirements for the air gap length under different working conditions. Users can achieve performance optimization by adjusting J according to the magnetic characteristics requirements of the circuit, while ensuring that the height range of the adjustment portion 41 can completely cover the maximum value of the air gap adjustment, that is, through this design parameter constraint, not only the rationality of the overall structure and functional design of the device is improved, but also the application adaptability and performance stability of the component are further enhanced.

[0054] In the specific implementation process, the second magnetic core 5 is arranged in a rectangular structure, and the second magnetic core 5 has a set thickness, and the set thickness is ≥ 0.5 mm, so as to improve the overall performance and reliability of the device by reasonably selecting the geometric shape and thickness parameters of the magnetic core.

[0055] Among them, the second magnetic core 5 is a rectangular structure, which is conducive to forming an efficient magnetic circuit closure design with the first magnetic core 4 and reducing magnetic flux leakage. This structural form also has a large planar contact area, can be stably connected to the adjustment part 41, and improve the structural stability. In addition, the thickness of the second magnetic core 5 is set to be not less than 0.5 mm. This parameter can provide sufficient magnetic conductivity while ensuring the strength of the magnetic core. The increase in thickness can effectively reduce the saturation risk of the magnetic core under high-frequency working conditions and adapt to higher current density requirements. That is, the second magnetic core 5 with a thickness of ≥0.5 mm has significant advantages in mechanical strength, can effectively resist external stress or vibration, and avoid fracture or deformation problems caused by the core being too thin. It is particularly suitable for high-stress or long-life working scenarios. At the same time, by increasing the thickness, the magnetic resistance of the magnetic core is significantly reduced, so that the magnetic conductivity performance of the magnetic circuit is enhanced, thereby improving the electromagnetic conversion efficiency of the device, which is particularly important for application scenarios requiring high-performance magnetic coupling. Of course, a larger thickness can expand the heat capacity of the second magnetic core 5. Combined with its external structural design, it can reduce the temperature rise rate of the device under high-power working conditions, improve the heat dissipation effect, and further improve the reliability and service life of the product.

[0056] In one embodiment, the first magnetic core 4 and the second magnetic core 5 structurally include at least one of a UU-type magnetic core, an EP-type magnetic core, an ER-type magnetic core or an EF-type magnetic core. Thus, different application scenarios and performance requirements can be effectively adapted by reasonably selecting the core type.

[0057] In one embodiment, the one-piece skeleton 1 includes at least one material selected from PPS, Bakelite or PA. Thus, by selecting the one-piece skeleton 1 made of PPS or PA material, the dimensional stability of the skeleton in a high temperature environment can be significantly improved, and the device failure problem caused by thermal expansion or contraction can be avoided. The Bakelite material has excellent electrical insulation performance, which can effectively reduce the interference of the skeleton to the external electric field, ensuring the safe and reliable operation of the transformer. The PPS material is particularly suitable for humid and highly corrosive working environments due to its excellent chemical corrosion resistance and moisture resistance, and the PA material is also suitable for scenarios that require impact resistance and vibration resistance. Among them, the high heat resistance of the PPS material makes it suitable for the application of high-frequency and high-power electronic components. The PA material is suitable for application scenarios that require both mechanical strength and durability, providing higher design flexibility. Therefore, by selecting PPS, Bakelite or PA material according to actual needs, the production cost can be reduced while ensuring that the performance meets the requirements, so as to adapt to diverse usage needs and significantly improve the overall performance of the device.

[0058] Preferably, the thickness of the insulation layer of the one-piece skeleton 1 is ≥0.1mm to reduce the risk of leakage, ensure the reliable operation of the skeleton in a high voltage and high frequency environment, meet higher levels of safety requirements, better resist the influence of environmental factors (such as high temperature, high humidity and corrosive gases), and improve the service life of the device. At the same time, the thickness of the insulation layer ≥0.1mm can also enhance the mechanical strength of the skeleton to a certain extent, reduce the influence of external forces on the internal magnetic core and windings, thereby improving the stability of the overall structure.

[0059] The insulating layer can be made of polyimide (PI), polyester film (PET) or epoxy resin material, and a uniform covering layer can be formed through molding or spraying processes to achieve an ideal insulating effect.

[0060] The present application also discloses an electronic device, including a plastic-encapsulated drive transformer as in any of the above-mentioned embodiments. For other working principles and processes of the electronic device of this embodiment, please refer to the description of the plastic-encapsulated drive transformer in the above-mentioned embodiment, which will not be repeated here.

[0061] The above is a detailed introduction to the plastic-encapsulated drive transformer and electronic device provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. It should be noted that in the present application, the descriptions of each embodiment have their own emphasis. For parts that are not described or recorded in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0062] The above are only preferred embodiments of the present application, and the patent scope of the present application is not limited thereto. The various technical features of the technical solution of the present application can be arbitrarily combined. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of this application, or directly or indirectly used in other related technical fields, as long as there is no contradiction in the combination of these technical features, are equally included in the patent protection scope of the present application.

Claims

1. A plastic-encapsulated drive transformer, characterized in that: include: An integrated frame, wherein a plurality of metal terminals are arranged at the bottom end of the integrated frame; A winding coil, wherein the winding coil is wound on the integrated frame, and the winding coil is led out with a lead connector corresponding to the metal terminal one by one, and the lead connector is electrically connected to the metal terminal; A first magnetic core, wherein the first magnetic core is disposed in the integrated frame and is covered by the integrated frame; a second magnetic core, the second magnetic core being disposed at the top end of the integrated frame and maintaining an adjustable external gap with the winding coil, and Two ends of the first magnetic core extend toward the top of the integrated frame, and are fixedly connected to the second magnetic core after protruding from the integrated frame to form a closed magnetic circuit.

2. The plastic-encapsulated drive transformer according to claim 1, characterized in that: The first magnetic core and the integrated frame are integrally injection molded.

3. The plastic-encapsulated drive transformer according to claim 1, characterized in that: The one-piece frame includes a winding part and an end plate part, the end plate part is integrally connected to two ends of the winding part, the winding wire package is wound around the winding part, and the metal terminal is connected to the end plate part.

4. The plastic-encapsulated drive transformer according to claim 3, characterized in that: The first magnetic core is connected to and communicates with the winding portion and the end plate portion within the integrated frame.

5. The plastic-encapsulated drive transformer according to claim 4, characterized in that: Two ends of the first magnetic core have adjusting parts arranged opposite to each other, the adjusting parts protrude from the end plate part toward the top end of the integrated frame, and the adjusting parts are fixedly connected to the second magnetic core.

6. The plastic-encapsulated drive transformer according to claim 5, characterized in that: The vertical height of the adjustment portion relative to the end plate portion is greater than or equal to the adjustable external gap.

7. The plastic-encapsulated drive transformer according to claim 1, characterized in that: The second magnetic core is arranged in a rectangular structure, and the second magnetic core has a set thickness, and the set thickness is ≥0.5 mm.

8. The plastic-encapsulated drive transformer according to claim 1, characterized in that: The first magnetic core and the second magnetic core structurally include at least one of a UU-type magnetic core, an EP-type magnetic core, an ER-type magnetic core or an EF-type magnetic core; and / or The one-piece frame is made of at least one material selected from the group consisting of PPS, Bakelite and PA; and / or The thickness of the insulation layer of the one-piece skeleton is ≥0.1 mm.

9. The plastic-encapsulated drive transformer according to claim 3, characterized in that: The metal terminal is embedded in a side of the end plate portion facing away from the second magnetic core, and includes a first connecting pin and a second connecting pin protruding from the end plate portion, a parallel interval is maintained between the first connecting pin and the second connecting pin, the lead connector is electrically connected to the first connecting pin, and the second connecting pin is externally connected to an external device.

10. An electronic device, characterized in that: It comprises the plastic-encapsulated drive transformer as described in any one of claims 1 to 9.

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