A common-mode inductor

Abstract

The present invention provides a common-mode inductor, comprising an inductor device, a base plate device positioned on one side of the inductor device, and a fixing member for securing the base plate device to the inductor device. The inductor device comprises a magnetic core and multiple coils wound around the magnetic core. The base plate device comprises a first base plate and a second base plate. The first base plate is provided with a plurality of first through holes, and the second base plate is provided with a plurality of second through holes. The apertures of the first through holes and the second through holes are both larger than the outer diameters of the pins. The common-mode inductor of the present invention secures the pins of the inductor device between the first through holes of the first base plate and the second through holes of the second base plate by extending the pins of the inductor device into the first through holes of the first base plate and the second through holes of the second base plate, and by rotating the second base plate relative to the first base plate, gradually reducing the overlapping area of ​​the first through holes and the second through holes. This improves the efficiency of securing the pins and eliminates the need for gluing the pins, thereby improving product assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic technology, and in particular to a common-mode inductor. Background Art

[0002] With the rapid development of the electronic information industry, common-mode inductors have gained widespread use. Common-mode inductors are components used in computer switching power supplies to filter common-mode electromagnetic interference signals. They must not only filter out common-mode electromagnetic interference on signal lines, but also suppress the radiated electromagnetic interference themselves, thereby preventing them from affecting the normal operation of other electronic devices in the same electromagnetic environment. Existing common-mode inductors utilize multiple coils, resulting in a large number of pins. This makes it difficult to precisely install the pins within the holes when mounting them on the baseboard. Furthermore, the pins mounted on the baseboard are prone to loosening, requiring glue to secure them, a complex process that requires multiple steps. This results in inefficient assembly of the common-mode inductor and impacts production capacity.

[0003] Therefore, it is necessary to provide a common-mode inductor to solve the above technical problems. Summary of the Invention

[0004] The present invention provides a common-mode inductor, which solves the problem in the prior art that it is difficult to assemble the pins of the common-mode inductor on the base plate, multiple processes are required to prevent the pins from loosening on the base plate, and the production efficiency is affected.

[0005] To solve the above technical problems, the present invention provides a technical solution: a common-mode inductor comprising an inductor device, a base plate device located on one side of the inductor device for fixing pins of the inductor device, and a fixing member located on the other side of the inductor device for fixing the base plate device to the inductor device. The inductor device comprises a magnetic core and multiple sets of coils wound around the magnetic core, with the pins at both ends of the multiple sets of coils facing the base plate device. The base plate device comprises a first base plate and a second base plate that rotates relative to the first base plate and is clamped to the first base plate. The first base plate is provided with a plurality of first through holes respectively corresponding to the pins, and the second base plate is provided with a plurality of second through holes corresponding to and overlapping with the first through holes. The apertures of the first and second through holes are both larger than the outer diameters of the pins. The second base plate rotates relative to the first base plate to reduce the overlapping area of ​​the first and second through holes, thereby clamping the pins within the first and second through holes.

[0006] In the present invention, a first fixing plate extending toward the first bottom plate is provided at the edge of the second bottom plate, and a limiting groove is provided on one side of the first fixing plate;

[0007] A fixing groove is provided at a position opposite to the first base plate and the first fixing plate, and a fixing block matching the limiting groove is provided on one side of the fixing groove. When the first fixing plate is located in the fixing groove, the overlapping area of ​​the second through hole and the first through hole is greater than the radial cross-sectional area of ​​the pin.

[0008] In the present invention, a second fixing plate is further provided on the first bottom plate, the fixing block is connected to the second fixing plate, and the fixing block is located between the second fixing plate and the fixing groove.

[0009] In the present invention, a connecting block is further provided on the second bottom plate, a side of the connecting block away from the first fixing plate is provided with an inclined surface, and a fixing hole for clamping the connecting block is provided on the first bottom plate.

[0010] In the present invention, a third through hole is further provided at the center of the first base plate, and an annular protrusion extending into the third through hole is provided at the center of the second base plate. The second base plate rotates relative to the first base plate with the annular protrusion as the rotation center.

[0011] In the present invention, a hollow protrusion is further provided on a side of the first bottom plate close to the inductive device, and a square hole communicating with the third through hole is provided on the surface of the hollow protrusion;

[0012] The fixing member includes a hollow column and a connecting plate connected side by side in the hollow column and with one end passing through the hollow column. The side by side connecting plates are each provided with a barb that is clamped on the side wall of the square hole.

[0013] In the present invention, a plurality of first partitions are provided around the hollow protrusion and extend toward the edge of the first bottom plate for separating adjacent coils.

[0014] In the present invention, a plurality of second partitions extending along the length direction of the hollow column are further provided on the peripheral side of the hollow column;

[0015] The magnetic core is annular, and a plurality of vertical and symmetrically arranged spacers are provided on the inner wall of the magnetic core. The plurality of symmetrical spacers are respectively located between adjacent coils, and a clamping groove for clamping the second spacer is formed between the symmetrical spacers.

[0016] In the present invention, an abutting plate is further provided at one end of the second partition plate, extending transversely to one side of the magnetic core and abutting against the magnetic core.

[0017] In the present invention, the hollow protrusion is further provided with positioning protrusions located on both sides of the square hole, and the peripheral side of the hollow column is further provided with symmetrical positioning tubes for clamping the positioning protrusions.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the common-mode inductor of the present invention extends the pins of the inductor device into the first through-hole of the first base plate and the second through-hole of the second base plate, and rotates the second base plate relative to the first base plate, so that the overlapping area of ​​the first through-hole and the second through-hole gradually decreases, thereby fixing the pins between the first through-hole and the second through-hole, preventing the pins from loosening in the base plate device. On the one hand, it is used to improve the efficiency of fixing the pins and speed up the assembly efficiency. On the other hand, it eliminates the need for gluing the pins and the base plate device, saving assembly procedures, not only improving the assembly efficiency of the product, but also speeding up the production capacity of the common-mode inductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0020] Figure 1 3D is a perspective view of a common-mode inductor according to the present invention.

[0021] Figure 2 FIG. 4 is an exploded diagram of the common-mode inductor of the present invention.

[0022] Figure 3 This is a perspective view of the base plate device of the common mode inductor of the present invention.

[0023] Figure 4 for Figure 3 A partial enlarged view of part A.

[0024] Figure 5 The first bottom plate of the common mode inductor of the present invention is a three-dimensional Figure 1 .

[0025] Figure 6 The first bottom plate of the common mode inductor of the present invention is a three-dimensional Figure 2 .

[0026] Figure 7 FIG. 4 is a perspective view of the second bottom plate of the common-mode inductor of the present invention.

[0027] Figure 8 The three-dimensional structure of the fixing member of the common mode inductor of the present invention Figure 1 .

[0028] Figure 9 The three-dimensional structure of the fixing member of the common mode inductor of the present invention Figure 2 .

[0029] Figure 10 This is a three-dimensional diagram of the magnetic core of the common mode inductor of the present invention.

[0030] 11. Inductor device; 12. Bottom plate device; 13. Fixing member; 111. Magnetic core; 1111. Spacer plate; 1112. Snap-fit ​​groove; 112. Coil; 121. First bottom plate; 122. Second bottom plate; 1210. Third through hole; 1211. Hollow protrusion; 1212. Positioning protrusion; 1213. First partition plate; 1214. Second fixing plate; 1215. Fixing block; 1216. Fixing groove; 1217. First through hole; 1218. Square hole; 1219. Fixing hole; 1221. First fixing plate; 1222. Limiting groove; 1223. Second through hole; 1224. Connecting block; 1225. Annular protrusion; 131. Hollow column; 132. Connecting plate; 133. Second partition plate; 134. Abutting plate; 135. Barb; 136. Positioning tube. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0032] Unless otherwise defined, technical or scientific terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0033] The words "first", "second" and similar terms used in the present patent application specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] The following is a preferred embodiment of a common-mode inductor provided by the present invention that can solve the above technical problems.

[0036] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 7 ,in Figure 1 is a three-dimensional diagram of the common mode inductor of the present invention, Figure 2 is an exploded diagram of the common-mode inductor of the present invention, Figure 3 is a perspective view of the base plate device of the common mode inductor of the present invention, Figure 5 The first bottom plate of the common mode inductor of the present invention is a three-dimensional Figure 1 , Figure 7 FIG. 4 is a perspective view of the second bottom plate of the common-mode inductor of the present invention.

[0037] In the figures, structurally similar elements are denoted by the same reference numerals.

[0038] The terms "first" and "second" in the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be used as a limitation on the order of precedence.

[0039] The present invention provides a common-mode inductor, comprising an inductor device 11, a base plate device 12 located on one side of the inductor device 11 for fixing the pins of the inductor device 11, and a fixing member 13 located on the other side of the inductor device 11 for fixing the base plate device 12 to the inductor device 11. The inductor device 11 comprises a magnetic core 111 and multiple sets of coils 112 wound around the magnetic core 111. The pins at both ends of the multiple sets of coils 112 are oriented toward the base plate device 12. The base plate device 12 comprises a first base plate 121 and a second base plate 122 that rotates relative to the first base plate 121 and is clamped to the first base plate 121. The first base plate 121 is provided with a plurality of first through holes 1217 respectively corresponding to the positions of the pins, and the second base plate 122 is provided with a plurality of second through holes 1223 corresponding to and overlapping with the first through holes 1217. The apertures of the first through holes 1217 and the second through holes 1223 are both larger than the outer diameters of the pins. The second base plate 122 rotates relative to the first base plate 121 to reduce the overlapping area of ​​the first through holes 1217 and the second through holes 1223, and clamp the pins between the first through holes 1217 and the second through holes 1223. The base plate device 12 is used to fix the pins on the inductor device 11, and the fixing member 13 is used to fix the pins on the inductor device 11. The bottom plate device 12 is fixed to the inductor device 11. On the one hand, it is used to prevent the bottom plate device 12 from being separated from the inductor device 11. On the other hand, it is used to form the inductor device 11 and the bottom plate device 12 into a whole. When fixing the pins of the inductor device 11, since the area of ​​the first through hole 1217 is larger than the outer diameter of the pin, it is convenient to insert multiple pins into the corresponding first through holes 1217 respectively. The second bottom plate 122 is installed below the first bottom plate 121. At the same time, the pins are aligned with the second through holes 1223 of the second bottom plate 122 and pass through the second through holes 1223. Furthermore, Rotate the second base plate 122 so that the second base plate 122 rotates relative to the first base plate 121, and the overlapping area of ​​the first through hole 1217 of the first base plate 121 and the second through hole 1223 of the second base plate 122 gradually decreases, so that the side wall of the first through hole 1217 and the side wall of the second through hole 1223 clamp the pin. On the one hand, it is convenient to fix the pin on the base plate device 12, which can effectively improve the efficiency of fixing the pin. On the other hand, it can effectively prevent the pin from loosening on the base plate device 12, eliminating the need to glue the pin and the base plate device 12, thereby improving the assembly efficiency of the product and increasing the production capacity of the product.

[0040] Please refer to Figure 3 、 Figure 4 and Figure 5, the edge of the second bottom plate 122 is provided with a first fixing plate 1221 extending toward the first bottom plate 121, a limiting groove 1222 is provided on one side of the first fixing plate 1221, a fixing groove 1216 is provided at a position opposite to the first bottom plate 121 and a fixing block 1215 matching the limiting groove 1222 is provided on one side of the fixing groove 1216, when the first fixing plate 1221 is located in the fixing groove 1216, the overlapping area of ​​the second through hole 1223 and the first through hole 1217 is greater than the radial cross-sectional area of ​​the pin, and the first fixing plate 1221 is used to extend into the fixing groove 1216 of the first bottom plate 121. On the one hand, the fixing groove 1216 is used to The first fixing plate 1221 is used to limit, and on the other hand, is used to position the second through hole 1223 of the second bottom plate 122, so that the second through hole 1223 of the second bottom plate 122 overlaps with the first through hole 1217 of the first bottom plate 121. When the second bottom plate 122 is rotated, the second bottom plate 122 rotates relative to the first bottom plate 121, so that the fixing block 1215 of the first bottom plate 121 enters the limiting groove 1222 of the second bottom plate 122. On the one hand, it is used to reduce the area of ​​the first through hole 1217 and the area of ​​the second through hole 1223, and on the other hand, the second bottom plate 122 is fixed on the first bottom plate 121 to prevent the second bottom plate 122 from separating from the first bottom plate 121.

[0041] A second fixing plate 1214 is also provided on the first base plate 121, and a fixing block 1215 is connected to the second fixing plate 1214. The fixing block 1215 is located between the second fixing plate 1214 and the fixing groove 1216. The second fixing plate 1214 is used to limit and resist the first fixing plate 1221. When the first fixing plate 1221 and the second fixing plate 1214 are in contact with each other, the side walls of the first through hole 1217 and the side walls of the second through hole 1223 clamp the pins at appropriate positions to prevent the side walls of the first through hole 1217 and the side walls of the second through hole 1223 from damaging the surface of the pins.

[0042] The second base plate 122 is also provided with a connecting block 1224, and a bevel is provided on the side of the connecting block 1224 away from the first fixing plate 1221. The first base plate 121 is provided with a fixing hole 1219 for clamping the connecting block 1224. The connecting block 1224 is used to be clamped in the fixing hole 1219. The fixing hole 1219 is used to limit the connecting block 1224 to prevent the second base plate 122 from being separated on the first base plate 121 after being fixed. At the same time, it is also used to prevent the pins clamped between the first through hole 1217 and the second through hole 1223 from loosening. Furthermore, the bevel is used to facilitate the movement of the second base plate 122 toward the fixing groove 1216, which is used to facilitate the disassembly of the first base plate 121 and the first base plate 121.

[0043] Please refer to Figure 6A third through hole 1210 is also provided at the center position of the first base plate 121, and an annular protrusion 1225 extending into the third through hole 1210 is provided at the center position of the second base plate 122. The second base plate 122 rotates relative to the first base plate 121 with the annular protrusion 1225 as the rotation center, and the annular protrusion 1225 of the second base plate 122 extends into the third through hole 1210 of the first base plate 121. When the second base plate 122 rotates on the first base plate 121, the annular protrusion 1225 of the second base plate 122 moves along the side wall of the third through hole 1210, thereby facilitating the rotation of the second base plate 122 on the first base plate 121.

[0044] Please refer to Figure 8 A hollow protrusion 1211 is further provided on the side of the first bottom plate 121 close to the inductive device 11. A square hole 1218 communicating with the third through hole 1210 is provided on the surface of the hollow protrusion 1211. The fixing member 13 includes a hollow column 131 and a connecting plate 132 connected side by side in the hollow column 131 and with one end passing through the hollow column 131. The side-by-side connecting plates 132 are each provided with a barb 135 that is clamped on the side wall of the square hole 1218. The hollow column 131 passes through the inductive device 11 and the barb 135 is clamped on the side wall of the square hole 1218. The hollow column 131 is used to fix the first bottom plate 121, making it convenient to fix the first bottom plate 121 to the inductive device 11.

[0045] The hollow protrusion 1211 is provided with a plurality of first partitions 1213 extending toward the edge of the first base plate 121 for separating adjacent coils 112. The first partitions 1213 are used to isolate adjacent coils 112 to prevent adjacent coils 112 from contacting each other and affecting the inductance.

[0046] The hollow column 131 is also provided with a plurality of second partitions 133 extending along the length direction of the hollow column 131 on the peripheral side. The magnetic core 111 is annular. The inner wall of the magnetic core 111 is provided with a plurality of vertical and symmetrical partitions 1111. The plurality of symmetrical partitions 1111 are respectively located between adjacent coils 112. A clamping groove 1112 for clamping the second partition 133 is formed between the symmetrical partitions 1111. The second partition 133 is clamped in the clamping groove 1112 of the magnetic core 111. The clamping groove 1112 is used to limit the second partition 133 to prevent the hollow column 131 from rotating in the magnetic core 111, thereby avoiding the hollow column 131 from shaking in the magnetic core 111.

[0047] One end of the second partition 133 is also provided with an abutment plate 134 that extends laterally to one side of the magnetic core 111 and abuts against the magnetic core 111. The abutment plate 134 is used to be grounded on the magnetic core 111. When one end of the hollow column 131 is clamped on the first bottom plate 121, the abutment plate 134 abuts on the magnetic core 111 to prevent the hollow column 131 from separating from the magnetic core 111, so that the first bottom plate 121 is separated from the inductor device 11 when the hollow column 131 is clamped on the first bottom plate 121. At the same time, the abutment plate 134 is used to separate adjacent coils 112 on the surface of the magnetic core 111 to prevent adjacent coils 112 from touching each other.

[0048] Please refer to Figure 9 The hollow protrusion 1211 is also provided with positioning protrusions 1212 located on both sides of the square hole 1218, and the surrounding side of the hollow column 131 is also provided with symmetrical positioning tubes 136 for clamping the positioning protrusions 1212. The positioning protrusions 1212 are fixed in the positioning tubes 136, and the hollow column 131 is used to further position the first bottom plate 121 to prevent the first bottom plate 121 connected to the hollow column 131 from shaking.

[0049] Working principle:

[0050] When assembling the common-mode inductor, first, wind the multiple coils 112 between the adjacent snap-fit ​​grooves 1112 on the magnetic core 111, with the pins at both ends of the multiple coils 112 facing one side, install the first base plate 121 on one side of the pins, and extend the multiple pins of the coils 112 into the corresponding first through holes 1217 on the first base plate 121. Since the aperture of the first through hole 1217 is larger than the outer diameter of the pin, it is convenient to extend the pin into the first through hole 1217, which is used to speed up the efficiency of the pin passing through the first through hole 1217. Further, extend the hollow column 131 into the magnetic core 111, and the second partition 133 on the side of the hollow column 131 extends into the snap-fit ​​groove 1112. On the one hand, the second partition 133 facilitates separating the multiple coils 112 in the magnetic core 111, and on the other hand, prevents the hollow column 131 from rotating in the magnetic core 111. When one end of the hollow column 131 passes through the magnetic core 111, the abutment plate 134 at the other end of the hollow column 131 abuts against the surface of the magnetic core 111, preventing the coils 112 adjacent to the surface of the magnetic core 111 from touching. Furthermore, the barb 135 in the hollow column 131 is clamped on the side wall of the square hole 1218 to prevent the first bottom plate 121 from separating from the magnetic core 111 device. At the same time, one end of the hollow column 131 is clamped on the first bottom plate 121, and the other end abuts on the magnetic core 111, thereby preventing the hollow column 131 from separating from the magnetic core 111.

[0051] Furthermore, the first fixing plate 1221 of the second bottom plate 122 is extended into the fixing groove 1216 of the first bottom plate 121, and the second bottom plate 122 is rotated in the direction of the fixing block 1215. The annular protrusion 1225 of the second bottom plate 122 rotates with the third through hole 1210 of the first bottom plate 121 as the rotation center, and the fixing block 1215 of the first bottom plate 121 gradually approaches the limiting groove 1222 of the second bottom plate 122. At this time, the overlapping area of ​​the first through hole 1217 of the first bottom plate 121 and the second through hole 1223 of the second bottom plate 122 gradually decreases. When the fixing block 1215 of the first bottom plate 121 is rotated into the limiting groove 1222 of the first fixing plate 1221 When the first fixing plate 1221 is fitted with the second fixing plate 1214, the side walls of the first through hole 1217 and the side walls of the second through hole 1223 clamp the pins, thereby fixing the pins in the base plate device 12. At the same time, the connecting block 1224 of the second base plate 122 is clamped in the fixing hole 1219 of the first base plate 121 to prevent the second base plate 122 from loosening on the first base plate 121. Through the above structure, on the one hand, the efficiency of fixing the pins on the base plate device 12 can be accelerated. On the other hand, the gluing of the pins and the fixing of the base plate device 12 are eliminated, and the gluing step is eliminated, which not only improves the efficiency of assembling common-mode inductors, but also speeds up the efficiency of producing common-mode inductors.

[0052] The common-mode inductor of this preferred embodiment extends the pins of the inductor device into the first through-hole of the first base plate and the second through-hole of the second base plate, and rotates the second base plate relative to the first base plate, so that the overlapping area of ​​the first through-hole and the second through-hole gradually decreases, thereby fixing the pins between the first through-hole and the second through-hole, preventing the pins from loosening in the base plate device. On the one hand, it is used to improve the efficiency of fixing the pins and speed up the assembly efficiency. On the other hand, it eliminates the need for gluing the pins and the base plate device, saving assembly procedures, which not only improves the assembly efficiency of the product, but also speeds up the production capacity of the common-mode inductor.

[0053] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A common mode inductor, characterized in that: The invention comprises an inductor device, a base plate device located on one side of the inductor device for fixing the pins of the inductor device, and a fixing member located on the other side of the inductor device for fixing the base plate device to the inductor device, wherein the inductor device comprises a magnetic core and multiple groups of coils wound on the magnetic core, the directions of the pins at both ends of the multiple groups of coils are all toward the base plate device, the base plate device comprises a first base plate and a second base plate that rotates relative to the first base plate and is clamped on the first base plate, the first base plate is provided with multiple first through holes respectively corresponding to the positions of the pins, the second base plate is provided with multiple second through holes corresponding to the first through holes and can overlap, the apertures of the first through holes and the second through holes are both larger than the outer diameter of the pins, the second base plate rotates relative to the first base plate to reduce the overlapping area of ​​the first through holes and the second through holes, so as to clamp the pins in the first through holes and the second through holes.

2. The common mode inductor according to claim 1, wherein: A first fixing plate extending toward the first bottom plate is provided at the edge of the second bottom plate, and a limiting groove is provided on one side of the first fixing plate; A fixing groove is provided at a position opposite to the first base plate and the first fixing plate, and a fixing block matching the limiting groove is provided on one side of the fixing groove. When the first fixing plate is located in the fixing groove, the overlapping area of ​​the second through hole and the first through hole is greater than the radial cross-sectional area of ​​the pin.

3. The common mode inductor according to claim 2, wherein: A second fixing plate is further provided on the first bottom plate, the fixing block is connected to the second fixing plate, and the fixing block is located between the second fixing plate and the fixing slot.

4. The common mode inductor according to claim 2, wherein: A connecting block is further provided on the second bottom plate. A slope is provided on a side of the connecting block away from the first fixing plate. A fixing hole for clamping the connecting block is provided on the first bottom plate.

5. The common mode inductor according to claim 1, wherein: A third through hole is further provided at the center of the first bottom plate, and an annular protrusion extending into the third through hole is provided at the center of the second bottom plate. The second bottom plate rotates relative to the first bottom plate with the annular protrusion as the rotation center.

6. The common mode inductor according to claim 5, characterized in that A hollow protrusion is further provided on a side of the first bottom plate close to the inductive device, and a square hole communicating with the third through hole is provided on the surface of the hollow protrusion; The fixing member includes a hollow column and a connecting plate connected side by side in the hollow column and with one end passing through the hollow column. The side by side connecting plates are each provided with a barb that is clamped on the side wall of the square hole.

7. The common mode inductor according to claim 6, wherein: A plurality of first partitions are provided on the peripheral side of the hollow protrusion and extend toward the edge of the first bottom plate for separating adjacent coils.

8. The common mode inductor according to claim 6, wherein: The hollow column is further provided with a plurality of second partitions extending along the length direction of the hollow column; The magnetic core is annular, and a plurality of vertical and symmetrically arranged spacers are provided on the inner wall of the magnetic core. The plurality of symmetrical spacers are respectively located between adjacent coils, and a clamping groove for clamping the second spacer is formed between the symmetrical spacers.

9. The common mode inductor according to claim 8, wherein: One end of the second partition is further provided with an abutting plate which extends transversely to one side of the magnetic core and abuts against the magnetic core.

10. The common mode inductor according to claim 6, wherein: The hollow protrusion is further provided with positioning protrusions located on both sides of the square hole, and the peripheral side of the hollow column is further provided with symmetrical positioning tubes for clamping the positioning protrusions.

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