A limitable electronic transformer

Abstract

The present invention provides a limitable electronic transformer, which specifically includes a transformer body, a limit plate and a limit member. Since the first clamping portion and the second clamping portion play a clamping role, the transformer body can be positioned and clamped. The first limit hole and the second limit hole on the limit plate ensure that the needle and the pin of the transformer body can be accurately plugged into the PCB board, thereby reducing the position offset caused by installation errors and making the transformer more stable during the assembly process. Through the use and coordination of the limit plate and the limit member, the transformer body is made more secure 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 in the prior art that it is difficult to plug an electronic transformer into a PCB board.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic transformer limiting, and in particular to a limitable electronic transformer. Background Art

[0002] Electronic transformers are key electrical devices that convert electrical energy from one voltage to another and are widely used in various electronic devices and power systems. As electronic products continue to become smaller, more integrated, and more intelligent, the requirements for electronic transformers, such as size, power density, and efficiency, are also increasing.

[0003] Conventional electronic transformers are assembled with two pin clamps, which secure the magnetic core and solder to the PCB. However, due to the large gap between the core and the frame, the pins of the pin clamps can become misaligned after installation, making it difficult to connect the pins to the PCB, thus affecting the efficiency of the transformer's assembly. Summary of the Invention

[0004] The purpose of the present invention is to provide a position-limited electronic transformer, which solves the technical problem in the prior art that it is difficult to plug the electronic transformer into a PCB board.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A position-limiting electronic transformer comprises: a transformer body and a position-limiting assembly, wherein the transformer body has two pin clamps and a plurality of pins, the pin clamps are provided with a first clamping portion, a second clamping portion, and a pin portion, the first clamping portion and the second clamping portion are both used to clamp the transformer body, and the pins and the pin portion are both used to be plugged and fixed to a PCB board;

[0007] The limiting assembly includes a limiting plate and a limiting member. The limiting plate is provided with two first limiting holes and several second limiting holes. The needle passes through the first limiting hole, and the pin passes through the second limiting hole. The limiting member is installed between the limiting plate and the transformer body. The limiting plate and the limiting member are both used to limit the installation of the transformer body.

[0008] Optionally, the transformer body includes a skeleton, a coil connected to the pin is wound on the skeleton, and the pin is mounted on the skeleton;

[0009] A first magnetic core and a second magnetic core are installed at both ends of the skeleton, the first clamping portion is clamped on the first magnetic core, and the second clamping portion is clamped on the second magnetic core; the limiting plate is located at the bottom of the second magnetic core, and the limiting member is connected to the second magnetic core.

[0010] Optionally, the limiting member includes a limiting plate located between the limiting piece and the second magnetic core, and both ends of the limiting plate are connected to a limiting cover passing through the second limiting hole; the limiting cover is sleeved with the needle portion, and the limiting cover is arranged vertically to the limiting plate.

[0011] Optionally, a limiting boss is vertically mounted on the limiting plate, and an arc-shaped limiting groove is provided on the second clamping portion; and a limiting surface is provided on the limiting boss that is arc-shaped and cooperates with the limiting groove.

[0012] Optionally, a positioning column is provided on the limiting surface, a first positioning hole that is connected to 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 column is plugged into and fitted with the first positioning hole and the second positioning hole in turn.

[0013] Optionally, a first wing plate and a second wing plate are provided at ends of the limiting plate opposite to each other, and the limiting plate, the limiting cover, the limiting boss, the positioning column, the first wing plate and the second wing plate are all integrally formed structures;

[0014] The first wing plate and the second wing plate are respectively arranged perpendicular to the limiting plate, and the length of the first wing plate is different from the length of the second wing plate.

[0015] Optionally, the limiting boss is provided with a first vibration-damping hole passing through both end surfaces thereof, and a second vibration-damping groove is opened on the side wall of the limiting boss, and the second vibration-damping groove is arranged perpendicular to the first vibration-damping hole.

[0016] Optionally, a positioning groove is provided at the bottom of the second magnetic core, a magnetic piece that is magnetically attracted to the second magnetic core is installed on the limiting plate, and the positioning groove is used to position and install the limiting piece and the magnetic piece;

[0017] Two 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.

[0018] Optionally, a surface of the limiting piece close to the transformer body is electroplated with a first shielding layer, and a surface of the limiting piece away from the transformer body is electroplated with a second shielding layer;

[0019] The first shielding layer and the second shielding layer are both used to perform electromagnetic shielding on the transformer body. The thickness of the first shielding layer is the same as that of the second shielding layer. The thickness of the first shielding layer and the second shielding layer is less than the thickness of the limiting piece.

[0020] Optionally, the limiting member is overlapped on the first shielding layer, and after passing through the first limiting hole, the limiting member contacts the second shielding layer, and the needle passes through the limiting member.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a limitable electronic transformer, which specifically includes a transformer body, a limit plate and a limit member. Since the first clamping portion and the second clamping portion play a clamping role, the transformer body can be positioned and clamped. The first limit hole and the second limit hole on the limit plate ensure that the needle and the pin of the transformer body can be accurately plugged into the PCB board, thereby reducing the position offset caused by installation errors and making the transformer more stable during the assembly process. Through the use and coordination of the limit plate and the limit member, the transformer body is made more secure 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 in the prior art that it is difficult to plug an electronic transformer into a PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and objectives that can be achieved by the present invention.

[0025] Figure 1 A schematic diagram of the three-dimensional structure of a position-limited electronic transformer disclosed in an embodiment of the present invention;

[0026] Figure 2 A schematic side view of a position-limited electronic transformer disclosed in an embodiment of the present invention;

[0027] Figure 3 for Figure 2 AA cross-sectional structural diagram;

[0028] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at point B;

[0029] Figure 5 This is a schematic diagram of the exploded structure of a transformer body in a position-limited electronic transformer disclosed in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the three-dimensional structure of a position-limiting needle clamp in an electronic transformer disclosed in an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the three-dimensional structure of a second magnetic core in a position-limited electronic transformer disclosed in an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the three-dimensional structure of a limiter assembly in a limitable electronic transformer disclosed in an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the exploded structure of a position-limiting component in a position-limiting electronic transformer disclosed in an embodiment of the present invention;

[0034] Figure 10 The present invention is a schematic structural diagram of a position-limiting member in a position-limiting electronic transformer disclosed in an embodiment of the present invention.

[0035] Illustration:

[0036] 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 clamp; 151. First clamping portion; 152. Second clamping portion; 1521. Limiting groove; 1522. First positioning hole; 153. Needle; 16. Pin

[0037] 20. Limiting assembly; 21. Limiting plate; 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 vibration-damping hole; 243. Second vibration-damping groove; 25. Positioning column; 26. First wing plate; 27. Second wing plate; 28. Magnetic sheet. DETAILED DESCRIPTION

[0038] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally located component.

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0041] The embodiment of the present invention provides a limitable electronic transformer, such as Figures 1 to 10 As shown, it includes: a transformer body 10 and a limiting assembly 20. The transformer body 10 has two needle clamps 15 and a plurality of pins 16. The needle clamp 15 is provided with a first clamping portion 151, a second clamping portion 152 and a needle portion 153. The first clamping portion 151 and the second clamping portion 152 are both used to clamp the transformer body 10. The pins 16 and the needle portion 153 are both used to be plugged and fixed to the PCB board.

[0042] The limiting assembly 20 includes a limiting plate 21 and a limiting member. The limiting plate 21 is provided with two first limiting holes 211 and a plurality of second limiting holes 212. The needle 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 plate 21 and the transformer body 10. The limiting plate 21 and the limiting member are both used to limit the installation of the transformer body 10. In the specific implementation process, the limiting plate 21 is a Mylar sheet and can be made of an insulating material such as polyethylene terephthalate. The double-layer constraint of the limiting plate 21 and the limiting member forms a "hard fixation + soft limit" mechanism, which not only prevents the electronic transformer from being installed too tightly and damaging the PCB pad, but also eliminates micro-displacement caused by mechanical stress.

[0043] It should be noted that the present invention provides a limitable electronic transformer, which can position and clamp the transformer body 10 due to the clamping effect of the first clamping part 151 and the second clamping part 152. Through the first limiting hole 211 and the second limiting hole 212 on the limiting plate 21, it is ensured that the needle part 153 and the pin 16 of the transformer body 10 can be accurately plugged into the PCB board, thereby reducing the position offset caused by installation errors, making the transformer more stable during the assembly process. Through the use of the limiting plate 21 and the limiting member, the transformer body 10 is made more secure 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 in the prior art that it is difficult to plug an electronic transformer into a PCB board.

[0044] As shown in the figure, the transformer body 10 includes a frame 11, on which a coil 12 connected to a pin 16 is wound, and the pin 16 is mounted on the frame 11;

[0045] The first magnetic core 13 and the second magnetic core 14 are installed at both ends of the skeleton 11. The first clamping portion 151 is clamped on the first magnetic core 13, and the second clamping portion 152 is clamped on the second magnetic core 14; the limiting piece 21 is located at the bottom of the second magnetic core 14, and the limiting piece is connected to the second magnetic core 14. In this embodiment, the first magnetic core 13 and the second magnetic core 14 are both 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. Different winding methods can be adopted according to actual application requirements, which will not be described here. The first magnetic core 13 is provided with two first clamping grooves 131, and the first clamping portion 151 is positioned and clamped in the first clamping groove 131; the second magnetic core 14 is provided with two second clamping grooves 143, 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 and enclosed to form a closed magnetic circuit.

[0046] It should be noted that the first clamping portion 151 is clamped on the first magnetic core 13, and the second clamping portion 152 is clamped on the second magnetic core 14, thereby ensuring the accurate installation and stability of the magnetic core and enhancing the closure of the magnetic circuit. At the same time, the coil 12 is rigidly supported by the skeleton 11, thereby reducing the vibration amplitude of the magnetic core under high-frequency working conditions.

[0047] like Figures 1 to 10 As shown, the limiting member includes a limiting plate 22 located between the limiting piece 21 and the second magnetic core 14, and both ends of the limiting plate 22 are connected to a limiting cover 23 passing through the second limiting hole 212; the limiting cover 23 is sleeved with the needle portion 153, and the limiting cover 23 is arranged vertically to the limiting plate 22.

[0048] It should be noted that, since the limiting cover 23 is sleeved with the needle portion 153, the precise fit 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 due to loose components, and improving the stability of the assembly. Since the limiting cover 23 passes through the second limiting hole 212 and is arranged perpendicular to the limiting plate 22, it ensures that the various parts of the transformer can be accurately positioned, effectively preventing possible deviations during the assembly process, and enhancing the positioning accuracy of the transformer body 10. Through the close fit between the limiting member and the limiting plate 21, the role of the shielding layer is further strengthened. The contact between the limiting cover 23 and the limiting plate 21 helps to optimize the electromagnetic shielding effect of the transformer and reduce the impact of external electromagnetic interference on the operation of the transformer. The use of the limiting plate 22 and the limiting cover 23 can effectively fix the components of the transformer, avoid loosening or deformation of components caused by vibration during use, and improve the shock resistance and durability of the electronic transformer.

[0049] like Figure 4 、 Figure 6 and Figure 10 As shown, a limiting boss 24 is vertically mounted on the limiting plate 22, and an arc-shaped limiting groove 1521 is provided on the second clamping portion 152; the limiting boss 24 is provided with an arc-shaped limiting surface 241 that is configured to limit the limiting groove 1521. In a specific implementation, the number of the limiting grooves 1521 is set to two.

[0050] It should be noted that the limiting cooperation between limiting surface 241 and limiting groove 1521 enhances the stability of transformer body 10 and magnetic core, effectively reducing the risk of component loosening, especially in high-frequency or high-vibration environments, and ensuring the structural stability of the electronic transformer during long-term use. The cooperation between limiting boss 24 and limiting groove 1521 effectively isolates external electromagnetic interference, further enhancing the electromagnetic shielding effect and improving the electromagnetic compatibility of the transformer.

[0051] like Figures 3 to 10 As shown, a positioning column 25 is provided on the limiting surface 241, a first positioning hole 1522 which is connected to 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, and the positioning column 25 is plugged into and matched with the first positioning hole 1522 and the second positioning hole 141 in sequence.

[0052] It should be noted that the insertion and engagement of the positioning post 25 with the first positioning hole 1522 and the second positioning hole 141, respectively, further ensures the accurate docking and fixation of the internal components of the transformer, enhances the stability and reliability of the transformer during long-term use, improves the transformer's seismic performance, prevents loosening of components due to vibration or external forces, and ensures the long-term efficient and stable operation of the transformer. The insertion and engagement of the transformer body 10 with the stopper simplifies the installation process, improves production efficiency, and reduces potential failures caused by improper assembly.

[0053] like Figures 3 to 10 As shown, the end portion of the limiting plate 22 is provided with a first wing plate 26 and a second wing plate 27 opposite to each other, 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;

[0054] The first wing plate 26 and the second wing plate 27 are respectively arranged 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 .

[0055] It should be noted that the first wing plate 26 and the second wing plate 27 are tightly connected to the limit plate 22, the limit cover 23, the limit boss 24, and the positioning column 25 through an integral molding design, forming a stable overall structure, which ensures that the performance of the transformer will not be reduced due to poor contact or looseness of each component during assembly, and can jointly resist external vibrations and shocks, thereby improving the seismic resistance of the transformer. The structure of the limiter helps to reduce the impact of external electromagnetic interference on the internal components of the transformer, thereby 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 to provide a stronger positioning force. The first wing plate 26 and the second wing plate 27 enhance the structural asymmetry of the limiter, which helps to avoid resonance and improves the seismic resistance of the transformer.

[0056] like Figures 8 to 10 As shown, the limiting boss 24 is provided with first vibration-damping holes 242 extending through both end surfaces thereof, and the sidewall of the limiting boss 24 is provided with second vibration-damping grooves 243, which are arranged perpendicular to the first vibration-damping holes 242. In a specific implementation, the number of second vibration-damping grooves 243 can be set to multiple, and the groove depth of each second vibration-damping groove 243 is different.

[0057] It should be noted that the provision of the first vibration-damping hole 242 and the second vibration-damping groove 243 reduces the overall weight of the stopper, effectively reducing the impact of vibration during transformer operation, alleviating damage to the transformer structure, and improving its overall seismic resistance. The first vibration-damping hole 242 and the second vibration-damping groove 243 effectively absorb external vibrations, protecting internal components from vibration, and thus extending the service life of the transformer. The first vibration-damping hole 242 and the second vibration-damping groove 243 are arranged perpendicular to each other. The first vibration-damping hole 242 (through hole) is arranged along the axis of the stopper boss 24, forming a longitudinal vibration-damping channel. The second vibration-damping groove 243 (sidewall groove) is provided perpendicular to the first vibration-damping hole 242, forming a transverse vibration isolation zone. Together, these form a rational vibration-damping structure, helping the electronic transformer maintain stability under vibration in different directions, further enhancing the stability of the electronic transformer and preventing performance fluctuations caused by changes in the external environment.

[0058] Specifically, the first vibration-damping hole 242, as a through-hole structure, can directly transfer some vibration energy into the hole, while the second vibration-damping groove 243, arranged perpendicular to the first vibration-damping hole 242, can further absorb and disperse vibration energy. Through the cooperation of these two, vibration energy is effectively dispersed and alleviated in multiple directions, reducing structural resonance caused by vibration and avoiding mechanical failure and stability issues caused by vibration.

[0059] like Figures 3 to 10 As shown, a positioning groove 142 is provided at the bottom of the second magnetic core 14, and a magnetic piece 28 that is magnetically attracted to the second magnetic core 14 is installed on the limiting plate 22. The positioning groove 142 is used to position and install the limiting piece 21 and the magnetic piece 28;

[0060] There are two limiting bosses 24 on the limiting plate 22. One end of the magnetic piece 28 abuts against one of the limiting bosses 24, and the other end of the magnetic piece 28 abuts against the other limiting boss 24. In a specific implementation, the magnetic piece 28 and the limiting plate 22 can be fixed by bonding or welding.

[0061] It should be noted that, since the positioning groove 142 at the bottom of the second magnetic core 14 is used to accurately position the limiting plate 21 and the magnetic plate 28, one end of the magnetic plate 28 contacts the first limiting boss 24 on the limiting plate 22, and the other end of the magnetic plate 28 contacts the second limiting boss 24, ensuring the stability and precise position of the magnetic plate 28 during the assembly process, effectively preventing the magnetic plate 28 from being offset due to vibration or external force, and ensuring the long-term stability of the transformer during use. By setting the positioning groove 142, the magnetic plate 28 and the second magnetic core 14 can be accurately docked, which optimizes the assembly process of the electronic transformer, simplifies the assembly operation, reduces assembly problems caused by errors, and improves production efficiency. The use of the magnetic plate 28 in conjunction with the limiting plate 22 not only ensures the stability of the structure, but also enhances the electromagnetic shielding effect. The cooperation between the limiting plate 22 and the magnetic plate 28 helps to further isolate electromagnetic interference, ensuring that the transformer will not be disturbed by the external electromagnetic environment while operating efficiently, and improving electromagnetic compatibility. In addition, the bottom magnetic sheet 28 forms a closed magnetic circuit with the first magnetic core 13 and the second magnetic core 14 of the transformer, reducing edge magnetic flux leakage and improving energy transmission efficiency. The magnetic sheet 28 compensates for the magnetic flux distortion at the core joints, making the overall magnetic flux distribution uniform.

[0062] like Figures 1 to 9 As shown, the side of the limiting piece 21 close to the transformer body 10 is electroplated with a first shielding layer 213, and the side of the limiting piece 21 away from the transformer body 10 is electroplated with a second shielding layer 214;

[0063] The first shielding layer 213 and the second shielding layer 214 are both used to provide electromagnetic shielding for the transformer body 10. The thickness of the first shielding layer 213 is the same as that of the second shielding layer 214. The thicknesses of the first shielding layer 213 and the second shielding layer 214 are less than the thickness of the limiting piece 21. In a specific implementation, the thickness of the first shielding layer 213 and the thickness of the second shielding layer 214 may also be different.

[0064] It should be noted that since the first shielding layer 213 and the second shielding layer 214 form a double shielding structure, the electromagnetic interference generated by the transformer body 10 during operation is significantly reduced, 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 and the thickness of the second shielding layer 214 are the same, and both are less than the thickness of the limiting plate 21 itself, it is ensured that the shielding layer achieves effective electromagnetic shielding while not significantly increasing the size or weight of the overall structure. During implementation, the thickness of the first shielding layer 213 and the second shielding layer 214 can be different, and can be flexibly adjusted according to actual needs to adapt to different electromagnetic environment requirements and ensure the stable operation of the transformer.

[0065] like Figures 1 to 9As shown, the limiting member is overlapped on the first shielding layer 213 , passes through the first limiting hole 211 and contacts the second shielding layer 214 , and the needle portion 153 passes through the limiting member.

[0066] It should be noted that the retaining member overlaps the first shielding layer 213 of the retaining plate 21 and, after passing through the first retaining hole 211, contacts the second shielding layer 214. This allows the retaining member to contact the first shielding layer 213 and the second shielding layer 214, respectively. This further improves the electromagnetic shielding effect of the transformer body 10 and reduces electromagnetic interference. Because the retaining member directly contacts the shielding layer, high-frequency noise can be directed through the PCB ground layer.

[0067] Working principle: The present invention provides a limitable electronic transformer. 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. The first limiting hole 211 and the second limiting hole 212 on the limiting plate 21 ensure that the needle portion 153 and the pin 16 of the transformer body 10 can be accurately plugged into the PCB board, thereby reducing the position offset caused by installation errors and making the transformer more stable during the assembly process. Through the use of the limiting plate 21 and the limiting member, the transformer body 10 is made more secure during the installation process, preventing loosening or dislocation during operation, thereby enhancing the overall stability of the transformer.

[0068] Because the first shielding layer 213 and the second shielding layer 214 form a double shielding structure, the electromagnetic interference generated by the transformer body 10 during operation is significantly reduced, thereby improving the electromagnetic compatibility of the device and avoiding the impact on other electronic devices. The limiter is overlapped on the first shielding layer 213 of the limit plate 21, and after passing through the first limit hole 211, it contacts the second shielding layer 214. The limiter is in contact 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. Because the limiter is in direct contact with the shielding layer, high-frequency noise can be discharged through the PCB ground layer.

[0069] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A limitable electronic transformer, characterized in that: The invention comprises a transformer body (10) and a limiting assembly (20), wherein the transformer body (10) has two needle clamps (15) and a plurality of pins (16), and the needle clamp (15) is provided with a first clamping portion (151), a second clamping portion (152) and a needle portion (153), wherein the first clamping portion (151) and the second clamping portion (152) are both used for clamping the transformer body (10), and the pins (16) and the needle portion (153) are both used for plugging and fixing with a PCB board; The limiting assembly (20) comprises 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 needle portion (153) passes through the first limiting hole (211), 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), and the limiting piece (21) and the limiting member are both used for limiting the installation of the transformer body (10); A first shielding layer (213) is electroplated on a side of the limiting piece (21) close to the transformer body (10), and a second shielding layer (214) is electroplated on a side of the limiting piece (21) away from the transformer body (10); the thickness of the first shielding layer (213) and the second shielding layer (214) are the same and smaller than the thickness of the limiting piece (21); The limiting member is overlapped on the first shielding layer (213), and the needle portion (153) passes through the limiting member; the transformer body (10) includes a skeleton (11), a first magnetic core (13) and a second magnetic core (14) are mounted at both ends of the skeleton (11), and the second clamping portion (152) is clamped on the second magnetic core (14); The limiting member comprises a limiting plate (22), both ends of the limiting plate (22) are connected to a limiting cover (23) passing through the second limiting hole (212), the limiting cover (23) is sleeved with the needle portion (153), and the limiting cover (23) passes through the first limiting hole (211) and contacts the second shielding layer (214) to guide high-frequency noise out through the PCB grounding layer; A limiting boss (24) for limiting the second clamping portion (152) is vertically mounted on the limiting plate (22), the limiting boss (24) being provided with a first vibration-damping hole (242) penetrating through both end faces thereof, a second vibration-damping groove (243) being provided on a side wall of the limiting boss (24), the second vibration-damping groove (243) being vertically arranged with respect to the first vibration-damping hole (242); The second clamping portion (152) is provided with an arc-shaped limiting groove (1521); the limiting boss (24) is provided with a limiting surface (241) which is arranged in an arc surface and is limitedly matched with the limiting groove (1521); a positioning column (25) is provided on the limiting surface (241); the second clamping portion (152) is provided with a first positioning hole (1522) which is connected with the limiting groove (1521); the bottom of the second magnetic core (14) is provided with a second positioning hole (141) corresponding to the first positioning hole (1522); the positioning column (25) is plugged and matched with the first positioning hole (1522) and the second positioning hole (141) in sequence.

2. The position-limitable electronic transformer according to claim 1, characterized in that: A coil (12) connected to the pin (16) is wound on the frame (11), and the pin (16) is mounted on the frame (11); The first clamping portion (151) is clamped on the first magnetic core (13), 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 position-limitable electronic transformer according to claim 2, characterized in that: The limiting member comprises a limiting plate (22) located between the limiting piece (21) and the second magnetic core (14); the limiting cover (23) is arranged perpendicular to the limiting plate (22).

4. The position-limitable electronic transformer according to claim 3, characterized in that: The end portions of the limiting plate (22) are provided with a first wing plate (26) and a second wing plate (27) opposite to each other, 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 arranged 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).

5. The position-limitable electronic transformer according to claim 4, characterized in that: A positioning groove (142) is provided at the bottom of the second magnetic core (14); a magnetic piece (28) magnetically attracted to the second magnetic core (14) is installed on the limiting plate (22); the positioning groove (142) is used to position and install the limiting piece (21) and the magnetic piece (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).

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