Limitable electronic transformer

Abstract

The invention provides an electronic transformer capable of being limited. The electronic transformer specifically comprises a transformer body, a limiting piece and a limiting piece. Due to the fact that the first clamping part and the second clamping part play a clamping role, the transformer body can be positioned and clamped. By means of the first limiting holes and the second limiting holes in the limiting pieces, it is ensured that the pin parts and the pins of the transformer body can be accurately inserted into the PCB, so that position deviation caused by installation errors is reduced, and the transformer is more stable in the assembling process. Through the cooperation of the limiting pieces and the limiting pieces, the transformer body is firmer in the installation process, looseness or dislocation in the operation process is prevented, and the overall stability of the transformer is enhanced. Therefore, the technical problem that in the prior art, it is difficult to plug the PCB into the electronic transformer is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic transformer limiting, and particularly relates to an electronic transformer with limiting function. Background Art

[0002] An electronic transformer is a key electrical device that converts electrical energy from one voltage to another, and is widely used in various electronic devices and power systems. With the continuous development of electronic products towards miniaturization, integration, and intelligence, the requirements for the volume, power density, and efficiency of electronic transformers are also constantly increasing.

[0003] In the prior art, two needle clips are installed in the assembly production of traditional electronic transformers. The needle clips play a role in fixing the magnetic core and welding and conducting the PCB board. However, due to the large gap between the magnetic core and the skeleton, after the needle clips are installed, the dimensions of the needle parts of the needle clips will be offset, resulting in difficulty in inserting the needle parts into the PCB board, thereby affecting the installation efficiency of the electronic transformer. Summary of the Invention

[0004] The purpose of the present invention is to provide an electronic transformer with limiting function, which solves the technical problem that it is difficult to insert the electronic transformer into the PCB board in the prior art.

[0005] To achieve this purpose, the present invention adopts the following technical solutions: An electronic transformer with limiting function includes: a transformer body and a limiting component. The transformer body has two needle clips and a plurality of pins. The needle clip is provided with a first clamping portion, a second clamping portion, and a needle part. The first clamping portion and the second clamping portion are both used to clamp the transformer body, and the pins and the needle part are both used to be inserted and fixed with the PCB board; The limiting component includes a limiting piece and a limiting member. The limiting piece is provided with two first limiting holes and a plurality of second limiting holes. The needle part passes through the first limiting hole, and the pins pass through the second limiting hole. The limiting member is installed between the limiting piece and the transformer body. The limiting piece and the limiting member are both used to limit and install the transformer body.

[0006] Optionally, the transformer body includes a skeleton, a coil connected to the pins is wound on the skeleton, and the pins are installed on the skeleton; The first magnetic core and the second magnetic core are installed at both ends of the skeleton. The first clamping portion clamps the first magnetic core, and the second clamping portion clamps the second magnetic core; the limiting piece is located at the bottom of the second magnetic core, and the limiting member is connected to the second magnetic core.

[0007] Optionally, the limiting member includes a limiting plate located between the limiting piece and the second magnetic core, and limiting covers passing through the second limiting holes are connected to both ends of the limiting plate; the limiting covers are sleeved on the needle part, and the limiting covers are vertically arranged with respect to the limiting plate.

[0008] Optionally, a limiting boss is vertically installed on the limiting plate, and a limiting groove arranged in an arc shape is provided on the second clamping part; a limiting surface arranged in an arc surface and in limiting cooperation with the limiting groove is provided on the limiting boss.

[0009] Optionally, a positioning post is provided on the limiting surface, a first positioning hole communicating with the limiting groove is provided on the second clamping part, a second positioning hole corresponding to the first positioning hole is opened at the bottom of the second magnetic core, and the positioning post is inserted and cooperated with the first positioning hole and the second positioning hole in sequence.

[0010] Optionally, a first wing plate and a second wing plate are oppositely provided at the end of the limiting plate, and the limiting plate, the limiting cover, the limiting boss, the positioning post, the first wing plate and the second wing plate are all integrally formed structures; The first wing plate and the second wing plate are respectively vertically arranged with respect to the limiting plate, and the length of the first wing plate is different from the length of the second wing plate.

[0011] Optionally, the limiting boss is provided with a first damping hole penetrating through both end faces thereof, and a second damping groove is opened on the side wall of the limiting boss, and the second damping groove is vertically arranged with respect to the first damping hole.

[0012] Optionally, a positioning groove is provided at the bottom of the second magnetic core, a magnetic sheet magnetically attracted to the second magnetic core is installed on the limiting plate, and the positioning groove is used for positioning and installing the limiting piece and the magnetic sheet; Two of the limiting bosses are distributed on the limiting plate, one end of the magnetic sheet abuts against one of the limiting bosses, and the other end of the magnetic sheet abuts against the other limiting boss.

[0013] Optionally, a first shielding layer is electroplated on the surface of the limiting piece close to the transformer body, and a second shielding layer is electroplated on the surface of the limiting piece far from the transformer body; Both the first shielding layer and the second shielding layer are used for electromagnetic shielding of the transformer body, the thickness of the first shielding layer is the same as the thickness of the second shielding layer, and the thicknesses of the first shielding layer and the second shielding layer are less than the thickness of the limiting piece.

[0014] Optionally, the limiting member is lapped on the first shielding layer, contacts the second shielding layer after passing through the first limiting hole, and the needle part passes through the limiting member.

[0015] Compared with the prior art, the present invention has the following beneficial effects: A position-limiting electronic transformer provided by the present invention specifically includes a transformer body, a position-limiting piece, and a position-limiting member. Since the first clamping portion and the second clamping portion play a clamping role, the transformer body can be positioned and clamped. Through the first limiting hole and the second limiting hole on the position-limiting piece, it is ensured that the needle portion and the pins of the transformer body can be accurately inserted into the PCB board, thereby reducing the position deviation caused by installation errors and making the transformer more stable during the assembly process. Through the use and cooperation of the position-limiting piece and the position-limiting member, the transformer body is made more firm during installation, preventing loosening or dislocation during operation and enhancing the overall stability of the transformer. Therefore, the present invention solves the technical problem that it is relatively difficult to insert the electronic transformer into the PCB board in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed by the present invention.

[0018] Figure 1 is a three-dimensional structure schematic diagram of a position-limiting electronic transformer disclosed in an embodiment of the present invention; Figure 2 is a side view structure schematic diagram of a position-limiting electronic transformer disclosed in an embodiment of the present invention; Figure 3 is Figure 2 the A-A cross-sectional structure schematic diagram of Figure 4 is Figure 3 the enlarged structure schematic diagram at B of Figure 5 is an exploded structure schematic diagram of the transformer body in a position-limiting electronic transformer disclosed in an embodiment of the present invention; Figure 6Schematic three-dimensional structure diagram of a needle clip in a limitable electronic transformer disclosed in an embodiment of the present invention; Figure 7 Schematic three-dimensional structure diagram of a second magnetic core in a limitable electronic transformer disclosed in an embodiment of the present invention; Figure 8 Schematic three-dimensional structure diagram of a limiting component in a limitable electronic transformer disclosed in an embodiment of the present invention; Figure 9 Exploded structure diagram of a limiting component in a limitable electronic transformer disclosed in an embodiment of the present invention; Figure 10 Schematic structure diagram of a limiting part in a limitable electronic transformer disclosed in an embodiment of the present invention.

[0019] Illustration description: 10. Transformer body; 11. Skeleton; 12. Coil; 13. First magnetic core; 131. First clamping groove; 14. Second magnetic core; 141. Second positioning hole; 142. Positioning groove; 143. Second clamping groove; 15. Needle clip; 151. First clamping part; 152. Second clamping part; 1521. Limiting groove; 1522. First positioning hole; 153. Needle part; 16. Pin. 20. Limiting component; 21. Limiting piece; 211. First limiting hole; 212. Second limiting hole; 213. First shielding layer; 214. Second shielding layer; 22. Limiting plate; 23. Limiting cover; 24. Limiting boss; 241. Limiting surface; 242. First damping hole; 243. Second damping groove; 25. Positioning column; 26. First wing plate; 27. Second wing plate; 28. Magnetic sheet. Detailed implementation manners

[0020] In order to make the invention objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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. Therefore, it should not be construed as a limitation to the present invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be intermediate components present simultaneously.

[0022] The technical solution of the present invention will be further described below in conjunction with the drawings and through specific embodiments.

[0023] An embodiment of the present invention provides a limitable electronic transformer, as Figures 1 to 10 shown, including: a transformer body 10 and a limiting component 20. The transformer body 10 has two pin clips 15 and a plurality of pins 16. The pin clip 15 is provided with a first clamping portion 151, a second clamping portion 152, and a pin portion 153. Both the first clamping portion 151 and the second clamping portion 152 are used to clamp the transformer body 10, and both the pin 16 and the pin portion 153 are used to be inserted and fixed to the PCB board; The limiting component 20 includes a limiting piece 21 and a limiting member. The limiting piece 21 is provided with two first limiting holes 211 and a plurality of second limiting holes 212. The pin portion 153 passes through the first limiting holes 211, and the pin 16 passes through the second limiting holes 212. The limiting member is installed between the limiting piece 21 and the transformer body 10. Both the limiting piece 21 and the limiting member are used to limit and install the transformer body 10. In the specific implementation process, the limiting piece 21 is a mylar sheet and can be made of insulating materials such as polyethylene terephthalate. Through the double-layer constraint of the limiting piece 21 and the limiting member, a "hard fixing + soft limiting" mechanism is formed, which not only prevents the electronic transformer from being installed too tightly and damaging the PCB pads, but also eliminates the micro-displacement caused by mechanical stress.

[0024] It should be noted that for a limitable electronic transformer provided by the present invention, since the first clamping portion 151 and the second clamping portion 152 play a clamping role, the transformer body 10 can be positioned and clamped. Through the first limiting holes 211 and the second limiting holes 212 on the limiting piece 21, it is ensured that the pin portion 153 and the pin 16 of the transformer body 10 can be accurately inserted into the PCB board, thereby reducing the position deviation caused by installation errors and making the transformer more stable during the assembly process. Through the use and cooperation of the limiting piece 21 and the limiting member, the transformer body 10 is made more firm during the installation process, preventing loosening or dislocation during operation and enhancing the overall stability of the transformer. Therefore, the present invention solves the technical problem that it is relatively difficult to insert the electronic transformer into the PCB board in the prior art.

[0025] As shown in the figure, the transformer body 10 includes a skeleton 11, on which a coil 12 connected to a pin 16 is wound, and the pin 16 is installed on the skeleton 11; At both ends of the skeleton 11, a first magnetic core 13 and a second magnetic core 14 are installed. A first clamping portion 151 clamps the first magnetic core 13, and a second clamping portion 152 clamps the second magnetic core 14; A limiting piece 21 is located at the bottom of the second magnetic core 14, and the limiting member is connected to the second magnetic core 14. In this embodiment, both the first magnetic core 13 and the second magnetic core 14 are RM-type magnetic cores well-known to those skilled in the art. The winding method of the coil 12 is a well-known technology in the art, and different winding methods can be adopted according to actual application requirements, which will not be elaborated here. Two first clamping grooves 131 are provided on the first magnetic core 13, and the first clamping portion 151 is positioned and clamped in the first clamping groove 131; Two second clamping grooves 143 are provided on the second magnetic core 14, and the second clamping portion 152 is positioned and clamped in the second clamping groove 143. The first magnetic core 13 and the second magnetic core 14 are abutted against each other to form a closed magnetic circuit.

[0026] It should be noted that by clamping the first magnetic core 13 with the first clamping portion 151 and clamping the second magnetic core 14 with the second clamping portion 152, the accurate installation and stability of the magnetic core are ensured, the magnetic circuit closure is enhanced, and at the same time, the coil 12 is rigidly supported by the skeleton 11, reducing the vibration amplitude of the magnetic core under high-frequency conditions.

[0027] As Figures 1 to 10 shown, the limiting member includes a limiting plate 22 located between the limiting piece 21 and the second magnetic core 14. Limiting covers 23 are connected to both ends of the limiting plate 22 and pass through the second limiting holes 212; The limiting cover 23 is sleeved with the needle portion 153, and the limiting cover 23 is perpendicular to the limiting plate 22.

[0028] It should be noted that since the limiting cover 23 is sleeved with the needle portion 153, the precise cooperation between the needle portion 153 and the limiting cover 23 is ensured, further strengthening the fixation between the transformer body 10 and the PCB board, avoiding the problem of poor contact caused by component loosening, and improving the stability of assembly. Since the limiting cover 23 passes through the second limiting holes 212 and is perpendicular to the limiting plate 22, the precise positioning of each part of the transformer is ensured, effectively preventing possible deviations during the assembly process and enhancing the positioning accuracy of the transformer body 10. Through the close cooperation between the limiting member and the limiting piece 21, the role of the shielding layer is further strengthened. The contact between the limiting cover 23 and the limiting piece 21 helps to optimize the electromagnetic shielding effect of the transformer, reducing the influence of external electromagnetic interference on the operation of the transformer. The use and cooperation of the limiting plate 22 and the limiting cover 23 can effectively fix the components of the transformer, avoiding the loosening or deformation of components caused by vibration during use, and improving the seismic resistance and durability of the electronic transformer.

[0029] AsFigure 4 , Figure 6 and Figure 10 As shown in Figure 4 , Figure 6 and Figure 10 , a limiting boss 24 is vertically installed on the limiting plate 22, and an arc-shaped limiting groove 1521 is provided on the second clamping portion 152; a limiting surface 241 which is arc-shaped and is in limiting cooperation with the limiting groove 1521 is provided on the limiting boss 24. In the specific implementation process, the number of the limiting grooves 1521 is set to two.

[0030] It should be noted that through the limiting cooperation between the limiting surface 241 and the limiting groove 1521, the stability of the transformer body 10 and the magnetic core is enhanced. Especially in high-frequency or high-vibration environments, the risk of component loosening is effectively reduced, ensuring the structural stability of the electronic transformer during long-term use. Through the cooperation between the limiting boss 24 and the limiting groove 1521, external electromagnetic interference is effectively isolated, and the electromagnetic shielding effect is further strengthened, improving the electromagnetic compatibility of the transformer.

[0031] As Figures 3 to 10 shown, a positioning post 25 is provided on the limiting surface 241, a first positioning hole 1522 communicating with the limiting groove 1521 is provided on the second clamping portion 152, and a second positioning hole 141 corresponding to the first positioning hole 1522 is opened at the bottom of the second magnetic core 14. The positioning post 25 is inserted into and cooperates with the first positioning hole 1522 and the second positioning hole 141 in sequence.

[0032] It should be noted that through the insertion and cooperation between the positioning post 25 and the first positioning hole 1522 and the second positioning hole 141 respectively, the accurate docking and fixation of each component inside the transformer are further ensured, enhancing the stability and reliability of the transformer during long-term use, improving the seismic performance of the transformer, avoiding component loosening under vibration or external force, and ensuring the long-term efficient and stable operation of the transformer. Through the insertion and cooperation between the transformer body 10 and the limiting member, the installation process is simplified, the production efficiency is improved, and potential failures caused by improper assembly are reduced.

[0033] As Figures 3 to 10 shown, a first wing plate 26 and a second wing plate 27 are oppositely provided at the end of the limiting plate 22. The limiting plate 22, the limiting cover 23, the limiting boss 24, the positioning post 25, the first wing plate 26 and the second wing plate 27 are all integrally formed structures; The first wing plate 26 and the second wing plate 27 are respectively perpendicular to the limiting plate 22, and the length of the first wing plate 26 is different from the length of the second wing plate 27.

[0034] It should be noted that the first wing plate 26 and the second wing plate 27 are tightly connected to the limiting plate 22, the limiting cover 23, the limiting boss 24, and the positioning column 25 through an integrally formed design, forming a stable overall structure, ensuring that each component will not reduce the performance of the transformer due to poor contact or looseness during assembly, being able to jointly resist external vibration and impact, improving the seismic resistance of the transformer. The structure of this limiting member helps to reduce the influence of external electromagnetic interference on the internal components of the transformer, enhancing the stability and durability of the transformer. Since the lengths of the first wing plate 26 and the second wing plate 27 are different, the structure of the transformer can be appropriately adjusted according to different application requirements, providing a stronger positioning force. The first wing plate 26 and the second wing plate 27 enhance the structural asymmetry of the limiting member, helping to avoid resonance phenomena and improving the seismic resistance of the transformer.

[0035] As Figures 8 to 10 shown, the limiting boss 24 is provided with a first damping hole 242 penetrating through both end faces thereof, and a second damping groove 243 is formed on the side wall of the limiting boss 24. The second damping groove 243 is vertically arranged with respect to the first damping hole 242. In the specific implementation process, the number of the second damping grooves 243 can be set to multiple, and the groove depths of each of the second damping grooves 243 are different.

[0036] It should be noted that through the arrangement of the first damping hole 242 and the second damping groove 243, the overall weight of the limiting member can be reduced, and the impact generated by vibration during the operation of the transformer can be effectively reduced, alleviating the damage to the structure of the transformer and improving its overall seismic performance. The first damping hole 242 and the second damping groove 243 can effectively absorb external vibrations, protecting the internal components from the influence of vibrations, thereby extending the service life of the transformer. By arranging the first damping hole 242 and the second damping groove 243 perpendicular to each other, the first damping hole 242 (through hole) is arranged along the axial direction of the limiting boss 24 to form a longitudinal damping channel, and the second damping groove 243 (side wall groove) is formed along a direction perpendicular to the first damping hole 242 to form a transverse vibration isolation belt, thereby jointly forming a reasonable damping structure, which helps the electronic transformer to remain stable under the action of vibrations in different directions, further enhancing the stability of the electronic transformer and avoiding performance fluctuations caused by changes in the external environment.

[0037] Specifically, as a through structure, the first damping hole 242 can directly transfer part of the vibration energy into the hole, while the second damping groove 243 is vertically arranged with respect to the first damping hole 242, which can further absorb and disperse the vibration energy. Through the cooperation of the two, the vibration energy is effectively dispersed and alleviated in multi-dimensional directions, being able to reduce the structural resonance caused by vibrations and avoid mechanical failures and stability problems caused by vibrations.

[0038] As Figures 3 to 10As shown, a positioning groove 142 is provided at the bottom of the second magnetic core 14, and a magnetic sheet 28 magnetically attracted to the second magnetic core 14 is installed on the limiting plate 22. The positioning groove 142 is used for positioning and installing the limiting sheet 21 and the magnetic sheet 28; Two limiting bosses 24 are distributed on the limiting plate 22. One end of the magnetic sheet 28 abuts against one of the limiting bosses 24, and the other end of the magnetic sheet 28 abuts against the other limiting boss 24. In the specific implementation process, the magnetic sheet 28 and the limiting plate 22 can be fixedly bonded or welded.

[0039] It should be noted that since the positioning groove 142 at the bottom of the second magnetic core 14 is used for precisely positioning the limiting sheet 21 and the magnetic sheet 28, one end of the magnetic sheet 28 contacts the first limiting boss 24 on the limiting plate 22, and the other end of the magnetic sheet 28 contacts the second limiting boss 24, ensuring the stability and precise position of the magnetic sheet 28 during the assembly process, effectively preventing the magnetic sheet 28 from shifting due to vibration or external force, and ensuring the long-term stability of the transformer during use. Through the setting of the positioning groove 142, the magnetic sheet 28 and the second magnetic core 14 can be accurately docked, optimizing the assembly process of the electronic transformer, simplifying the assembly operation, reducing assembly problems caused by errors, and improving production efficiency. The use and cooperation of the magnetic sheet 28 and the limiting plate 22 not only ensure the stability of the structure but also enhance the electromagnetic shielding effect. The cooperation between the limiting plate 22 and the magnetic sheet 28 helps to further isolate electromagnetic interference, ensuring that the transformer will not be interfered by the external electromagnetic environment while operating efficiently, and improving the electromagnetic compatibility. In addition, the bottom magnetic sheet 28 and the first magnetic core 13 and the second magnetic core 14 of the transformer form a closed magnetic circuit, reducing the leakage of edge magnetic flux and improving the energy transmission efficiency. By compensating for the magnetic flux distortion at the magnetic core joint with the magnetic sheet 28, the overall magnetic flux distribution is made uniform. As Figures 1 to 9 shown, a first shielding layer 213 is electroplated on the surface of the limiting sheet 21 close to the transformer body 10, and a second shielding layer 214 is electroplated on the surface of the limiting sheet 21 far from the transformer body 10; Both the first shielding layer 213 and the second shielding layer 214 are used for electromagnetic shielding of the transformer body 10. The thickness of the first shielding layer 213 is the same as that of the second shielding layer 214, and the thicknesses of the first shielding layer 213 and the second shielding layer 214 are less than the thickness of the limiting sheet 21. In the specific implementation process, the thicknesses of the first shielding layer 213 and the second shielding layer 214 can also be different.

[0040] It should be noted that since the first shielding layer 213 and the second shielding layer 214 form a double shielding structure, it significantly reduces the electromagnetic interference generated by the transformer body 10 during operation, thereby improving the electromagnetic compatibility of the device and avoiding the impact on other electronic devices. Since the thickness of the first shielding layer 213 is the same as that of the second shielding layer 214, and both are less than the thickness of the limiting piece 21 itself, it ensures that the shielding layer can achieve effective electromagnetic shielding without significantly increasing the size or weight of the overall structure. During implementation, the thicknesses of the first shielding layer 213 and the second shielding layer 214 can be different, and thus can be flexibly adjusted according to actual requirements to adapt to different electromagnetic environment requirements and ensure the stable operation of the transformer.

[0041] As Figures 1 to 9 shown, the limiting piece overlaps on the first shielding layer 213, passes through the first limiting hole 211 and then contacts the second shielding layer 214, and the needle part 153 passes through the limiting piece.

[0042] It should be noted that the limiting piece overlaps on the first shielding layer 213 of the limiting piece 21 and contacts the second shielding layer 214 after passing through the first limiting hole 211, so that the limiting piece forms contacts with the first shielding layer 213 and the second shielding layer 214 respectively, further improving the electromagnetic shielding effect of the transformer body 10 and reducing electromagnetic interference. Since the limiting piece is in direct contact with the shielding layer, high-frequency noise can be led out through the PCB grounding layer.

[0043] Working principle: For the limitable electronic transformer provided by the present invention, since the first clamping part 151 and the second clamping part 152 play a clamping role, the transformer body 10 can be positioned and clamped. Through the first limiting hole 211 and the second limiting hole 212 on the limiting piece 21, it is ensured that the needle part 153 and the pin 16 of the transformer body 10 can be accurately inserted into the PCB board, thereby reducing the position deviation caused by installation errors and making the transformer more stable during the assembly process. Through the use and cooperation of the limiting piece 21 and the limiting part, the transformer body 10 is made more firm during installation, preventing loosening or dislocation during operation, and enhancing the overall stability of the transformer.

[0044] Since the first shielding layer 213 and the second shielding layer 214 form a double shielding structure, it significantly reduces the electromagnetic interference generated by the transformer body 10 during operation, thereby improving the electromagnetic compatibility of the device and avoiding the impact on other electronic devices. By overlapping the limiting piece on the first shielding layer 213 of the limiting piece 21 and contacting the second shielding layer 214 after passing through the first limiting hole 211, the limiting piece forms contacts with the first shielding layer 213 and the second shielding layer 214 respectively, further improving the electromagnetic shielding effect of the transformer body 10 and reducing electromagnetic interference. Since the limiting piece is in direct contact with the shielding layer, high-frequency noise can be led out through the PCB grounding layer.

[0045] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An electronically transformable device with position limiting means, characterized in that, It includes a transformer body (10) and a limiting component (20). The transformer body (10) has two pin clips (15) and a plurality of pins (16). The pin clip (15) is provided with a first clamping portion (151), a second clamping portion (152) and a pin portion (153). The first clamping portion (151) and the second clamping portion (152) are both used for clamping the transformer body (10). The pin (16) and the pin portion (153) are both used for plugging and fixing with a PCB board. The limiting component (20) includes a limiting piece (21) and a limiting member. The limiting piece (21) is provided with two first limiting holes (211) and a plurality of second limiting holes (212). The pin portion (153) passes through the first limiting hole (211), and the pin (16) passes through the second limiting hole (212). The limiting member is installed between the limiting piece (21) and the transformer body (10). The limiting piece (21) and the limiting member are both used for limiting and installing the transformer body (10).

2. The position-limitable electronic transformer according to claim 1, characterized in that, The transformer body (10) includes a bobbin (11). A coil (12) connected to the pin (16) is wound around the bobbin (11), and the pin (16) is installed on the bobbin (11). Both ends of the bobbin (11) are installed with a first magnetic core (13) and a second magnetic core (14). The first clamping portion (151) clamps the first magnetic core (13), and the second clamping portion (152) clamps the second magnetic core (14). The limiting piece (21) is located at the bottom of the second magnetic core (14), and the limiting member is connected to the second magnetic core (14).

3. The limit - positionable electronic transformer according to claim 2, wherein, The limiting member includes a limiting plate (22) located between the limiting piece (21) and the second magnetic core (14). Both ends of the limiting plate (22) are connected with a limiting cover (23) passing through the second limiting hole (212). The limiting cover (23) is sleeved on the pin portion (153), and the limiting cover (23) is perpendicular to the limiting plate (22).

4. The position-limitable electronic transformer according to claim 3, characterized in that, A limiting boss (24) is vertically installed on the limiting plate (22). An arc-shaped limiting groove (1521) is provided on the second clamping portion (152). A limiting surface (241) which is arc-shaped and is in limiting cooperation with the limiting groove (1521) is provided on the limiting boss (24).

5. The position-limitable electronic transformer according to claim 4, wherein, A positioning post (25) is provided on the limiting surface (241). A first positioning hole (1522) communicating with the limiting groove (1521) is provided on the second clamping portion (152). A second positioning hole (141) corresponding to the first positioning hole (1522) is opened at the bottom of the second magnetic core (14). The positioning post (25) is inserted and cooperated with the first positioning hole (1522) and the second positioning hole (141) in sequence.

6. The position-limitable electronic transformer according to claim 5, wherein, The end of the limiting plate (22) is relatively provided with a first wing plate (26) and a second wing plate (27), and the limiting plate (22), the limiting cover (23), the limiting boss (24), the positioning column (25), the first wing plate (26) and the second wing plate (27) are all integrally formed structures; The first wing plate (26) and the second wing plate (27) are respectively perpendicular to the limiting plate (22), and the length of the first wing plate (26) is different from the length of the second wing plate (27).

7. The position-limitable electronic transformer according to claim 5 or 6, characterized in that, The limiting boss (24) is provided with a first damping hole (242) penetrating through its two end faces, and a second damping groove (243) is formed on the side wall of the limiting boss (24), and the second damping groove (243) is perpendicular to the first damping hole (242).

8. The position-limitable electronic transformer according to any one of claims 4 to 6, characterized in that, A positioning groove (142) is provided at the bottom of the second magnetic core (14), and a magnetic sheet (28) magnetically attracted to the second magnetic core (14) is installed on the limiting plate (22), and the positioning groove (142) is used for positioning and installing the limiting sheet (21) and the magnetic sheet (28); Two of the limiting bosses (24) are distributed on the limiting plate (22), one end of the magnetic sheet (28) abuts against one of the limiting bosses (24), and the other end of the magnetic sheet (28) abuts against the other limiting boss (24).

9. The position-limitable electronic transformer according to claim 1, characterized in that, A first shielding layer (213) is electroplated on the surface of the limiting sheet (21) close to the transformer body (10), and a second shielding layer (214) is electroplated on the surface of the limiting sheet (21) away from the transformer body (10); Both the first shielding layer (213) and the second shielding layer (214) are used for electromagnetic shielding of the transformer body (10), the thickness of the first shielding layer (213) is the same as the thickness of the second shielding layer (214), and the thicknesses of the first shielding layer (213) and the second shielding layer (214) are less than the thickness of the limiting sheet (21).

10. The limitably positionable electronic transformer according to claim 9, wherein, The limiting member is lapped on the first shielding layer (213), passes through the first limiting hole (211) and then contacts the second shielding layer (214), and the needle part (153) passes through the limiting member.

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