Inductor prefabricated assembly, inductor and manufacturing method thereof, and electronic product

Abstract

The invention provides an inductor prefabricated assembly, an inductor, a manufacturing method of the inductor and an electronic product, and the inductor prefabricated assembly comprises a magnetic core shell which is provided with a containing groove with a profiling peripheral wall; the main body of the coil winding is positioned in the accommodating groove, and the peripheral contour of the main body is similar to the contour of the profiling peripheral wall; the T-shaped magnetic core comprises a plate part and a column part extending out of the plate part, the column part can be sleeved with the main body, the plate part can be arranged in the containing groove and located at the opening of the containing groove, the contour of the peripheral part of the plate part is similar to the contour of the profiling peripheral wall, the plate part is provided with two notches, and a protrusion is formed between the two notches; a receding groove can be formed among each notch, the corresponding protrusion and the corresponding profiling peripheral wall, and a pin of the coil winding can penetrate through each receding groove. The electronic product comprises the inductor, the inductor is integrally formed by hot pressing of the inductor prefabricated assembly, the invention further provides a method for manufacturing the inductor, the inductor prefabricated assembly can effectively avoid cracks on the side face and / or the interior of the inductor after the inductor is formed, and short circuit of the finished inductor is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic products, in particular to an inductor pre-assembly, an inductor made of the inductor pre-assembly, a manufacturing method of the inductor and an electronic product comprising the inductor. BACKGROUND

[0002] At present, the production mode of the integrally formed inductor by hot-press forming is as follows: firstly, winding the coil winding, then laying the magnetic powder in the forming mold in sequence, embedding the coil, filling the magnetic powder again, and finally forming the inductor by hot-press forming through the forming mold. However, this filling and hot-pressing mode is easily affected by the particle size of the magnetic powder, the coil winding and the magnetic structure, so that the filled magnetic powder is uneven, and finally the inductor after hot-pressing has the problem of local density deficiency, which leads to the inductor being prone to surface cracks and / or internal local cracks and other serious problems.

[0003] To this end, as shown in the prior art, Figures 1 to 3 A new production mode for integrally forming an inductor 9 is as follows: winding the coil winding 91, forming a T-shaped magnetic core 92 and a magnetic core shell 93 by cold-press forming, and finally assembling the T-shaped magnetic core 92, the coil winding 91 and the magnetic core shell 93 and then forming the inductor 9 by hot-press forming. The magnetic core shell 93 is provided with a receiving groove 931, and the receiving groove 931 has a profiled peripheral wall 9311 which is similar in profile to the coil winding 91, so that after the coil winding 91 is placed in the receiving groove 931, the profiled peripheral wall 9311 fits the profile of the coil winding 91. The T-shaped magnetic core 92 includes a plate portion 921 and a column portion 922 extending from the plate portion 921, and the peripheral profile of the plate portion 921 is similar to the peripheral profile of the magnetic core shell 93. One side of the plate portion 921 is provided with two avoiding openings 9211 to avoid the pins 911 of the coil winding 91, and the two avoiding openings 9211 form a protrusion 9212 therebetween. When the T-shaped magnetic core 92 is assembled with the magnetic core shell 93, the plate portion 921 covers the opening of the receiving groove 931, and the protrusion 9212 is lapped on the magnetic core shell 93, and the avoiding openings 9211 at the shaft portion profile of the plate portion 921 are substantially coincided with the shaft portion profile of the magnetic core shell 93.

[0004] The new production mode of the inductor 9 can better solve the problem of side cracks and / or internal local cracks of the inductor 9 after hot-press forming due to insufficient density, but based on the current structure design of the T-shaped magnetic core 92 and the assembly mode of the T-shaped magnetic core 92 and the magnetic core shell 93, the inductor 9 after forming is prone to the following defects: copper leakage on the side of the inductor 9 (i.e. unnecessary exposure of the pins 911 of the coil winding 91), which leads to poor tin climbing on the side of the inductor 9 during electroplating, and there is a risk of short circuit. SUMMARY

[0005] The first object of the present application is to provide an inductor preform assembly which can effectively avoid the occurrence of side cracks and / or internal partial cracks after the inductor is formed and avoid the short circuit of the finished inductor.

[0006] The second object of the present application is to provide an inductor provided with the above inductor preform assembly.

[0007] The third object of the present application is to provide a manufacturing method of the above inductor.

[0008] The fourth object of the present application is to provide an electronic product provided with the above inductor.

[0009] In order to achieve the first object of the present application, the present application provides an inductor preform assembly, which comprises a magnetic core shell, a coil winding and a T-shaped magnetic core. The magnetic core shell is provided with a receiving groove, and the receiving groove has a profiled peripheral wall. The main body of the coil winding is located in the receiving groove, and the profile of the profiled peripheral wall is similar to the profile of the peripheral part of the main body of the coil winding. The T-shaped magnetic core comprises a plate part and a column part extending from the plate part, and the main body can be sleeved on the column part. The plate part can be placed in the receiving groove and located at the opening of the receiving groove, and the profile of the peripheral part of the plate part is similar to the profile of the profiled peripheral wall. The plate part is provided with two notches, and a protrusion is formed between the two notches. An avoiding groove can be formed between each notch, the protrusion and the profiled peripheral wall, and one pin of the coil winding can be arranged in each avoiding groove.

[0010] As can be seen from the above, the matching structure design of the magnetic core shell and the T-shaped magnetic core can ensure that the internal magnetic powder of the inductor is uniformly filled after the inductor preform assembly is hot-pressed to form an inductor, so as to prevent the occurrence of surface cracks and / or internal partial cracks of the inductor after hot-pressing due to insufficient density. At the same time, it can also avoid the deformation and extrusion of the coil winding into the inner wall of the magnetic core shell due to the pressure during the hot-pressing process, prevent the pins of the coil winding from being exposed on the side of the inductor after hot-pressing, and further prevent the inductor from being short-circuited due to poor tin climbing on the side during electroplating of the inductor.

[0011] A preferred scheme is that the peripheral part of the plate part is gap-fitted with the profiled peripheral wall.

[0012] As can be seen from the above, during the hot-pressing integrated forming process of the inductor preform assembly, the design can avoid the deformation or damage of the magnetic core shell, the plate part and the coil winding due to excessive extrusion fitting between the plate part and the profiled peripheral wall, and also helps to ensure the dimensional accuracy of the inductor after forming.

[0013] A further scheme is that, in the depth direction of the receiving groove, the height of the T-shaped magnetic core is between 1.02 times and 1.08 times the depth of the receiving groove.

[0014] As can be seen from the above, in the process of hot-pressing integrated molding of the inductor pre-assembly, the design can fill the tiny gap between the plate part and the profiled peripheral wall, ensure the close connection between the magnetic core shell and the T-shaped magnetic core, and prevent the internal cavity of the inductor after molding, the occurrence of local cracks, and the occurrence of cracks on the surface of the inductor after molding.

[0015] Another preferred scheme is that the cross-sectional profile of the accommodating groove is U-shaped or D-shaped; and / or the cross-sectional profile of the column part is circular, oval or rectangular.

[0016] As can be seen from the above, the shape of the accommodating groove can be adjusted according to the coil winding body of different winding shapes, improving the application range, practicality and production flexibility of the magnetic core shell; the shape of the column part can be adjusted according to the coil winding body of different winding shapes, improving the application range, practicality and production flexibility of the T-shaped magnetic core.

[0017] Another preferred scheme is that the first height of the column part is greater than or equal to the second height of the body.

[0018] As can be seen from the above, the design can ensure the coupling efficiency of the coil winding and the column part, and reduce the magnetic leakage.

[0019] A further scheme is that the accommodating groove is formed with a profiled step at the high-position pin of the coil winding, the profiled step is located between the high-position pin and the bottom of the accommodating groove; the profile of the side surface of the profiled step facing the body is similar to the peripheral profile of the body, and the top surface of the profiled step can support the high-position pin.

[0020] As can be seen from the above, the profiled step can effectively support the high-position pin of the coil winding, avoid the high-position pin from being deformed too much during the hot-pressing integrated molding of the inductor, and prevent the pins of the coil winding from being short-circuited with the coil winding body.

[0021] In order to realize the second purpose of the present application, the present application provides an inductor, wherein the inductor pre-assembly described above is included, and the magnetic core shell, the coil winding and the T-shaped magnetic core are connected by hot-pressing integrated molding.

[0022] As can be seen from the above, the inductor made of the inductor pre-assembly described above can ensure the uniform filling of the magnetic powder inside the inductor, prevent the inductor from having surface cracks and / or internal local cracks due to insufficient density after hot-pressing molding, and further avoid the coil winding from being deformed and extruded to the inner wall of the magnetic core shell during the hot-pressing molding process, prevent the pins of the coil winding from being exposed on the side surface of the inductor, and further prevent the inductor from being short-circuited due to poor tin climbing on the side surface during electroplating.

[0023] A further scheme is that the plate part is formed with a groove after hot-pressing integrated molding, the groove penetrates the plate part along the extension direction of the plate part, and the groove is located between the two pins of the coil winding.

[0024] As can be seen from the above, the recess is formed to increase the creepage distance between the two pins, thereby avoiding the risk of breakdown or short circuit caused by too close distance between the pins.

[0025] To achieve the third object of the present application, the present application provides a method for manufacturing an inductor, wherein the inductor is the above-mentioned inductor, and the method comprises: forming a magnetic core shell and a T-shaped magnetic core by a magnetic core cold-press forming process respectively, and winding a coil winding; implanting the coil winding into a receiving groove so that two pins of the coil winding extend out of the receiving groove; installing the T-shaped magnetic core into the receiving groove so that the main body is sleeved outside the column part, the plate part is filled in the opening of the receiving groove in cooperation with the profiled peripheral wall, and each pin of the coil winding is located in the avoiding groove formed by the corresponding notch, the protrusion and the profiled peripheral wall; bending each pin of the coil winding to make the pin end adhere to the plate part; and hot-pressing the assembled inductor preassembly to form an integrated body.

[0026] As can be seen from the above, the inductor manufactured by the above-mentioned method is not prone to cracks on the surface and / or inside, and the formed inductor side surface is not exposed to the coil winding pin, thereby preventing the inductor from short circuit caused by poor tin climbing on the side surface during electroplating.

[0027] To achieve the fourth object of the present application, the present application provides an electronic product comprising a printed circuit board, wherein the printed circuit board is installed with the above-mentioned inductor, or the printed circuit board is installed with the inductor manufactured by the above-mentioned method.

[0028] As can be seen from the above, the electronic product is installed with the above-mentioned inductor, thereby making the operation reliable and stable. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural diagram of an existing inductor.

[0030] Figure 2 is a structural diagram of a magnetic core shell of an existing inductor.

[0031] Figure 3 is a structural diagram of a T-shaped magnetic core of an existing inductor.

[0032] Figure 4 is a structural diagram of an assembled inductor preassembly of an embodiment of the inductor of the present application.

[0033] Figure 5 is an exploded view of an inductor preassembly of an embodiment of the inductor of the present application.

[0034] Figure 6 is a structural diagram of a T-shaped magnetic core of an embodiment of the inductor of the present application.

[0035] Figure 7 is an assembly structural diagram of a magnetic core shell and a T-shaped magnetic core of an embodiment of the inductor of the present application.

[0036] Figure 8 is a structural diagram of a coil winding of an inductor embodiment of the present application.

[0037] Figure 9 is an assembly structural diagram of a T-shaped magnetic core coil winding of an inductor embodiment of the present application.

[0038] Figure 10 is an assembly structural diagram of a T-shaped magnetic core coil winding of an inductor embodiment of the present application.

[0039] Figure 11 is a structural diagram of an inductor embodiment of the present application.

[0040] Figure 12 is an assembly flowchart of an inductor manufacturing method embodiment of the present application.

[0041] The present application is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0042] Inductor embodiment Referring to Figure 4 and Figure 5 , the inductor 100 is assembled by an inductor pre-assembly component 101 and then integrally formed by hot pressing. The inductor pre-assembly component 101 includes a magnetic core shell 1, a T-shaped magnetic core 2 and a coil winding 3.

[0043] The magnetic core shell 1 is a pre-assembly component, which is formed by pressing at room temperature using magnetic powder. The magnetic core shell 1 has a receiving groove 11, which has a profiled peripheral wall 111 that is profiled to match the peripheral contour B of the main body 31 of the coil winding 3, so that when the coil winding 3 is placed in the receiving groove 11, the profiled peripheral wall 111 can be in close contact with the main body 31 of the coil winding 3 and parts of the two pins (including the high-level pin 32 and the low-level pin 33 described below), so as to limit the coil winding 3 and prevent the coil winding 3 from shaking or moving significantly.

[0044] In addition, compared with a conventional receiving groove (with a rectangular cross section), the design of the profiled peripheral wall 111 also helps to realize magnetic powder filling, reduce the hollow space in the receiving groove 11 after the coil winding 3 is installed, so as to effectively support the peripheral contour B of the coil winding 3 during the hot pressing of the inductor pre-assembly component 101, avoid damage and skew of the coil winding 3 under pressure, and at the same time ensure the density of the internal structure of the inductor 100 after hot pressing, so as to avoid cracks on the surface and / or inside of the inductor 100.

[0045] In the embodiment, the main body 31 of the coil winding 3 is in a ring shape, and therefore the cross-section profile of the accommodating groove 11 is in a U shape. In some embodiments, the main body 31 of the coil winding 3 is in a rectangular frame shape, and therefore the cross-section profile of the accommodating groove 11 is in a D shape. It can be seen that the shape of the accommodating groove 11 can be adjusted according to the main body 31 of different winding shapes, thereby improving the application range, practicability and production flexibility of the magnetic core shell 1. It can be understood that the main body 31 can also be in other shapes, and the cross-section profile of the accommodating groove 11 is always matched with the shape of the main body 31, which will not be illustrated one by one here.

[0046] In combination Figure 6 , the T-shaped magnetic core 2 comprises an integrally formed plate portion 21 and a column portion 22, and the column portion 22 extends from the plate portion 21. The T-shaped magnetic core 2 is a prefabricated part, which is formed by pressing magnetic powder at room temperature. The peripheral profile A of the plate portion 21 is matched with the profile of the profiled peripheral wall 111. In addition, the plate portion 21 is provided with notches 211 at two pins of the coil winding 3, respectively, so that a protrusion 212 is formed between the two notches 211. As shown in Figure 7 , when the T-shaped magnetic core 2 is assembled to the magnetic core shell 1, the column portion 22 is inserted into the accommodating groove 11, and the main body 31 is sleeved on the column portion 22, the plate portion 21 is located in the accommodating groove 11, and the plate portion 21 is located at the opening of the accommodating groove 11 to fill the opening of the accommodating groove 11. In addition, each notch 211 and the protrusion 212, the profiled peripheral wall 111 form an avoiding groove 10, so that the pins of the coil winding 3 can extend out of the magnetic core shell 1 through a corresponding avoiding groove 10.

[0047] The design of the T-shaped magnetic core 2 makes the plate portion 21 can be assembled into the accommodating groove 11, which can assist to enhance the structural strength of the opening of the accommodating groove 11, and avoid the unintended deformation of the magnetic core shell 1 at the opening of the accommodating groove 11 during the hot-press forming process. On the other hand, compared with the prior art (see Figure 1 ), the notches 211 and the protrusion 212, the profiled peripheral wall 111 form the avoiding groove 10, which can shield the unnecessary exposed part of the pins of the coil winding 3, thereby effectively preventing the pins from being exposed on the side of the inductor 100 (the wall of the accommodating groove 11), avoiding the tin climbing defect on the side during the electroplating of the inductor 100, and further preventing the short circuit of the inductor 100. On the other hand, the plate portion 21 is placed in the accommodating groove 11, and the cooperation of the notches 211, the protrusion 212 and the profiled peripheral wall 111 can ensure that the magnetic core material of the T-shaped magnetic core 2 and / or the magnetic core shell 1, and / or the supplementary filled magnetic material can reliably fill the gap between the avoiding groove 10 and the pins during the hot-press forming process, thereby ensuring the unnecessary exposure of the pins and preventing the existence of gaps and / or cracks around the pins.

[0048] The cross-sectional profile of the column portion 22 is preferably adapted to the main body 31 of the coil winding 3, and in this embodiment, the cross-sectional profile of the column portion 22 is circular; it can be understood that in other embodiments, the cross-sectional profile of the column portion 22 can be oval, rectangular, rounded rectangular, or other shapes. It can be seen that the shape of the column portion 22 can be changed and adjusted according to the coil winding 3 main body 31 of different winding shapes, which improves the application range, practicality and production flexibility of the T-shaped magnetic core 2, and also ensures the coupling efficiency between the column portion 22 and the main body 31.

[0049] In addition, after the T-shaped magnetic core 2 is assembled with the magnetic core shell 1, the gap between the peripheral profile A of the plate portion 21 and the contoured peripheral wall 111 of the magnetic core shell 1 is fitted, so that during the hot-pressing integrated molding process of the inductor preform assembly 101, the plate portion 21 and the contoured peripheral wall 111 will not be excessively extruded, thereby avoiding deformation or damage of the magnetic core shell 1, the plate portion 21, the coil winding 3, etc., and ensuring the dimensional accuracy of the inductor 100 after molding.

[0050] Preferably, the height of the T-shaped magnetic core 2 is slightly higher than the depth of the accommodating groove 11; for example, in the depth direction of the accommodating groove 11, the height of the T-shaped magnetic core 2 is between 1.02 times and 1.08 times the depth of the accommodating groove 11. This design allows the small gap between the plate portion 21 and the contoured peripheral wall 111 of the inductor preform assembly 101 during the hot-pressing integrated molding process to be filled with the magnetic core material of the T-shaped magnetic core 2 and / or the magnetic core shell 1, ensuring the tight connection between the magnetic core shell 1 and the T-shaped magnetic core 2, and helping to prevent the formation of internal cavities, local cracks, surface cracks, etc. in the inductor 100 after molding.

[0051] Further, the first height of the column portion 22 is greater than or equal to the second height of the main body 31, to ensure the coupling efficiency of the coil winding 3 and the column portion 22 and reduce magnetic leakage.

[0052] The winding method of the coil winding 3 is not limited to lying winding, alpha counter-winding or other winding methods; in this embodiment, the coil winding 3 adopts lying winding, as shown in Figure 8 The coil winding 3 has a main body 31, a high-level pin 32 and a low-level pin 33; since the coils of the main body 31 are spirally wound, the two pins of the coil winding 3 have a height difference, the high-level pin 32 refers to the pin with a high position height (i.e. the pin close to the opening of the accommodating groove 11), and the low-level pin 33 refers to the pin with a low position height (i.e. the pin close to the bottom of the accommodating groove 11).

[0053] In combination with Figure 9, the accommodating groove 11 is further formed with a profiling step 112 between the bottom of the accommodating groove 11 and the high-positioned pin 32, the top surface of the profiling step 112 is used for supporting the high-positioned pin 32; in addition, the profile of the side surface 1121 of the profiling step 112 facing the side surface of the main body 31 of the coil winding 3 is similar to the peripheral profile B of the main body 31, so that when the coil winding 3 is placed in the accommodating groove 11, the side surface 1121 of the profiling step 112 is close to the peripheral profile B of the main body 31, and the top surface of the profiling step 112 supports the high-positioned pin 32. Since the profiling step 112 supports the high-positioned pin 32, it avoids the high-positioned pin 32 from being deformed greatly in the hot-pressing forming process due to being suspended, and prevents the short circuit between the high-positioned pin 32 and the main body 31; wherein the design of the profiling step 112 is more effective for supporting, preventing large deformation and preventing short circuit of the lying-wound coil winding 3.

[0054] As shown in Figure 10 , when the magnetic core shell 1, the coil winding 3 and the T-shaped magnetic core 2 are assembled, the two pins of the coil winding 3 are stretched out to the outside of the magnetic core shell 1 through the corresponding avoiding grooves 10, and then the two pins of the coil winding 3 are bent to be overlapped and attached on the plate part 21.

[0055] As shown in Figure 11 , after the magnetic core shell 1, the coil winding 3 and the T-shaped magnetic core 2 are connected by hot-pressing integrated forming, that is, after the inductor 100 is hot-pressed, preferably, a groove 213 is formed in part of the magnetic core shell 1 and the plate part 21, the groove 213 penetrates the plate part 21 and the magnetic core shell 1 along the extension direction of the groove 213, and the groove 213 is located between the two pins of the coil winding 3. By forming the groove 213, the creepage distance between the two pins can be increased, so that the risk of breakdown or short circuit caused by too close distance between the pins is avoided.

[0056] As can be seen from the above, through the structural design of the inductor preform assembly 101, the coil winding 3 can be surrounded by the magnetic core shell 1 and the T-shaped magnetic core 2 as much as possible, so that the inductor 100 is uniformly filled after forming, avoiding the existence of hollow to prevent cracks on the side and / or surface of the inductor 100. In addition, under the cooperation of the structure of the T-shaped magnetic core 2 and the magnetic core shell 1, the pins of the coil winding 3 can be prevented from being exposed on the side of the inductor 100, and the tin climbing defect on the side during electroplating is prevented, thereby preventing the short circuit of the inductor 100.

[0057] Method for manufacturing inductor In combination Figure 12 , the manufacturing method provided by the present application is used for manufacturing the inductor 100 described in the above inductor 100 embodiment, and the manufacturing method process is as follows: Firstly, the magnetic core shell 1, the T-shaped magnetic core 2 are cold-pressed, and the coil winding 3 is wound and formed.

[0058] Next, the coil winding 3 is implanted into the accommodating groove 11 of the magnetic core shell 1, and the two pins of the coil winding 3 are extended out of the accommodating groove 11.

[0059] Next, the T-shaped magnetic core 2 is installed into the accommodating groove 11, so that the main body 31 is sleeved outside the column part 22, and the plate part 21 is matched with the profiled circumferential wall 111 to be filled at the opening of the accommodating groove 11. At this time, each pin of the coil winding 3 is located in the avoiding groove 10 formed by the corresponding notch 211, the protrusion 212 and the profiled circumferential wall 111.

[0060] Next, the bending treatment is performed on each pin of the coil winding 3, so that the end of the pin is attached to the plate part 21.

[0061] Next, the assembled magnetic core shell 1, T-shaped magnetic core 2 and coil winding 3 are integrally formed by hot pressing.

[0062] The inductor 100 made by the manufacturing method has no cracks on the surface and / or inside, and the inductor 100 formed has no exposed pins of the coil winding 3 on the side surface, so that the tin climbing on the side surface during the electroplating of the inductor 100 is prevented, and the short circuit of the inductor 100 is avoided.

[0063] Electronic product embodiment The electronic product includes a printed circuit board, and the printed circuit board is provided with an inductor. The inductor is the inductor described in the above inductor embodiment and / or is made by the manufacturing method of the inductor. The electronic product is provided with the inductor, so that the operation is reliable and stable.

[0064] Finally, it should be emphasized that the above description is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. Inductor prefabricated components, including: A magnetic core shell, wherein the magnetic core shell is provided with a receiving groove, and the receiving groove has a contoured peripheral wall; A coil winding, wherein the main body of the coil winding is located in the accommodating groove, and the contour of the contoured peripheral wall is similar to the peripheral contour of the main body of the coil winding; A T-shaped magnetic core, the T-shaped magnetic core comprising a plate portion and a column portion extending from the plate portion, the main body being sleeved on the column portion; Its characteristics are: The plate portion can be placed in the accommodating groove and located at the opening of the accommodating groove. The peripheral contour of the plate portion is similar to the contour of the contoured peripheral wall. The plate portion is provided with two notches, and a protrusion is formed between the two notches. An avoidance groove can be formed between each of the notches and the protrusion and the contoured peripheral wall. A pin of the coil winding can be passed through each of the avoidance grooves.

2. The inductor prefabricated assembly according to claim 1, characterized in that: The peripheral contour of the plate portion is clearance-matched with the contoured peripheral wall.

3. The inductor prefabricated assembly according to claim 2, characterized in that: In the depth direction of the accommodating groove, the height of the T-shaped magnetic core is between 1.02 times and 1.08 times the depth of the accommodating groove.

4. The inductor prefabricated assembly according to claim 1, wherein: The cross-section of the receiving groove is U-shaped or D-shaped; and / or The cross section of the column portion is circular, elliptical or rectangular.

5. The inductor prefabricated assembly according to claim 1, characterized in that: The first height of the column portion is greater than or equal to the second height of the main body.

6. The inductor prefabricated assembly according to any one of claims 1 to 5, characterized in that: The receiving groove is formed with a contoured step at the high-position pin of the coil winding, and the contoured step is located between the high-position pin and the bottom of the receiving groove; The contour of the side surface of the contoured step facing the main body is similar to the peripheral contour of the main body, and the top surface of the contoured step can support the high-position pin.

7. Inductor, characterized in that, The inductor prefabricated assembly comprises the inductor according to any one of claims 1 to 6, wherein the magnetic core shell, the coil winding and the T-shaped magnetic core are connected by hot pressing integrally formed.

8. The inductor according to claim 7, wherein: The plate portion is formed with a groove after hot pressing and integral molding. The groove penetrates the plate portion along its extension direction and is located between two pins of the coil winding.

9. A method for manufacturing an inductor, characterized in that: The inductor is the inductor according to claim 7 or 8, and the manufacturing method includes: Forming the magnetic core shell and the T-shaped magnetic core respectively through a magnetic core cold pressing process, and winding the coil winding into shape; implanting the coil winding into the receiving slot so that two pins of the coil winding extend out of the receiving slot; Install the T-shaped magnetic core into the receiving groove, so that the main body is sleeved outside the column, the plate cooperates with the contoured peripheral wall to seal the open area of ​​the receiving groove, and each pin of the coil winding is located in the corresponding avoidance groove formed by the notch, the protrusion, and the contoured peripheral wall; Bending each pin of the coil winding so that an end of the pin fits on the plate portion; The assembled prefabricated inductor components are hot pressed into an integral body.

10. Electronic products, including printed circuit boards, characterized in that: The printed circuit board is mounted with the inductor as claimed in claim 7 or 8, or The printed circuit board is mounted with an inductor manufactured by the manufacturing method according to claim 9.

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