Inductor

Abstract

The inductor comprises two magnetic cores and a winding group, each magnetic core comprises a substrate part, the substrate part extends out of a middle column and a limiting side part, a coil holder mounting space is formed between the middle column and the limiting side part, and the limiting side part is provided with two first notches; the winding group comprises a winding frame and a winding wire, the winding frame comprises a wire frame main body and a wire outlet part connected to one side of the wire frame main body, an up-and-down through assembly hole and a winding groove arranged around the assembly hole are formed in the wire frame main body, and the winding wire is wound around the winding groove; the two magnetic cores are assembled on the upper side and the lower side of the winding set respectively, middle columns of the two magnetic cores oppositely stretch into the assembling holes, an air gap is formed between the middle columns, the coil holder body and the winding wire are located in coil holder installation spaces of the two magnetic cores, the first notches of the two magnetic cores are opposite in pairs, and the wire outlet part is located on the outer side of one set of opposite first notches. And the other group of opposite first gaps are subjected to glue dispensing to fix the two magnetic cores and the winding group. According to the utility model, the firm combination of the two magnetic cores and the winding group is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to inductance technical field especially relates to a kind of inductor. BACKGROUND

[0002] A kind of common inductor includes two magnetic cores and a winding group, magnetic core includes substrate part, the middle part and the periphery of substrate part respectively extend to the same side and form the line frame installation space between the middle column and the limiting side portion, middle column and the limiting side portion;Winding group includes winding frame and winding, winding frame includes line frame main body and the outgoing line portion connected in one side of line frame main body, line frame main body is formed with the assembly hole that passes from top to bottom and the winding slot that is arranged around assembly hole, winding is wound in the winding slot;Two magnetic cores are respectively assembled in the upper and lower sides of winding group, line frame main body and winding are located in the line frame installation space of two magnetic cores.The conventional inductor of this kind is fixed when carrying out two magnetic cores and winding group, usually using adhesive tape to wind two magnetic cores to be fixed, or using mechanical buckling structure to be buckled on two magnetic cores to be fixed, but no matter which kind of fixed mode is difficult to guarantee the firmness of the combination of two magnetic cores and winding group. SUMMARY

[0003] The utility model aims at providing a kind of inductor, it is favorable to the firm combination of two magnetic cores and winding group.

[0004] To achieve the above object, the utility model provides a kind of inductor, the inductor includes two magnetic cores and a winding group, the magnetic core includes substrate part, the middle part and the periphery of substrate part respectively extend to the same side and form the line frame installation space between the middle column and the limiting side portion, the limiting side portion has two first notches located in the opposite sides of the middle column;The winding group includes winding frame and winding, the winding frame includes line frame main body and the outgoing line portion connected in one side of line frame main body, the line frame main body is formed with the assembly hole that passes from top to bottom and the winding slot that is arranged around the assembly hole, the winding is wound in the winding slot;Two the magnetic core is respectively assembled in the upper and lower sides of winding group, wherein the middle column of two the magnetic core is opposite and extends into the assembly hole and forms air gap between them, the line frame main body and the winding are located in the line frame installation space of two the magnetic core, the first notch of two the magnetic core is opposite two by two, the outgoing line portion is located in the outside of one group of opposite the first notch, another group of opposite the first notch is glued to fix two the magnetic core and the winding group.

[0005] Optionally, one side of the substrate part that extends the middle column is formed with recess, the recess is outwardly penetrated at the position corresponding the first notch of the substrate part, and the recess corresponding to another group of opposite the first notch is filled with glue.

[0006] Optionally, the substrate portion is provided with the groove penetrating outwardly corresponding to each of the first notches.

[0007] The wire outlet portion is capable of being assembled corresponding to any of the first notches of the magnetic core.

[0008] Optionally, the bobbin body comprises two oppositely arranged annular side plate portions defining the wire winding groove, and the wire outlet portion is connected to the same side of the outer edges of the two side plate portions, and the first protrusion is protruded from the side plate portion opposite to the wire winding groove near the wire outlet portion, and the first protrusion is positioned in the corresponding groove capable of limiting the lateral movement of the first protrusion.

[0009] Optionally, the first groove is formed on the side of the substrate portion protruding from the middle column;

[0010] The bobbin body comprises two oppositely arranged annular side plate portions defining the wire winding groove, and the first protrusion is protruded from the side of the side plate portion opposite to the wire winding groove, and the first protrusion is positioned in the corresponding first groove.

[0011] Optionally, the first groove is provided corresponding to the first notch.

[0012] The wire outlet portion is connected to the same side of the outer edges of the two side plate portions, and the first protrusion is protruded from the side plate portion opposite to the wire winding groove near the wire outlet portion.

[0013] Optionally, the first groove is formed on the side of the substrate portion protruding from the middle column corresponding to one of the first notches, and the second groove penetrating outwardly is formed on the side of the substrate portion protruding from the middle column corresponding to the other first notch.

[0014] The gel is filled into the second groove corresponding to the other group of opposite first notches.

[0015] Optionally, the bobbin body comprises two oppositely arranged annular side plate portions defining the wire winding groove, and the connecting portion corresponding to one of the first notches is protruded outwardly from the edge position of the side plate portion, and the wire outlet portion is connected to the side plate portion through the connecting portion, and the two sides of the wire outlet portion outwardly exceed the two side edges of the connecting portion, and at least part of the wire outlet portion is located on the side of the side plate portion opposite to the wire winding groove, and the second protrusion corresponding to the assembly of one of the first notches is protruded from the surface of the wire outlet portion toward the side where the connecting portion is located; the first notch penetrates the substrate portion; the second protrusion is assembled and positioned at the other end of the first notch away from the substrate portion.

[0016] Optionally, the first groove corresponding to the first notch is formed on the side of the substrate portion protruding from the middle column;

[0017] The side plate part is provided with a first protrusion protruding away from the winding groove at a position close to the wire outlet part, the first protrusion is positioned in the first groove, and the first groove can limit lateral movement of the first protrusion.

[0018] Optionally, the two groups of first notches are glued to fix the two magnetic cores and the winding group.

[0019] Optionally, the winding is wrapped with an insulating tape on the outside.

[0020] Optionally, at least one tape for fixing the two magnetic cores is wound around the outer surfaces of the two magnetic cores.

[0021] Optionally, the limiting side part has heat dissipation notches respectively located at the other two opposite sides of the column, and the heat dissipation notches of the two magnetic cores are opposite to each other.

[0022] Optionally, the base plate part is formed with a buckle part at the opposite two side edges of one side opposite to the column, the buckle parts of the two magnetic cores are opposite to each other, and each group of opposite buckle parts is provided with a clamping piece.

[0023] Optionally, the magnetic core is square as a whole, and chamfers are arranged at four corners of the magnetic core, and the chamfers are formed in the base plate part and the limiting side part.

[0024] In the embodiment of the utility model, the limiting side part has two first notches located at the opposite two sides of the column, the first notches of the two magnetic cores are opposite to each other after the two magnetic cores and the winding group are assembled, the wire outlet part is located at the outside of one group of opposite first notches, and the other group of opposite first notches is glued to fix the two magnetic cores and the winding group. Since the other group of opposite first notches is glued to fix the two magnetic cores and the winding group, the two magnetic cores and the winding group can be combined together by the glue, thereby facilitating firm combination between the two magnetic cores and the winding group. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a three-dimensional structure schematic view of the two magnetic cores and the winding frame of the inductor of the embodiment of the utility model.

[0026] Figure 2 It is a three-dimensional structure schematic view of the two magnetic cores and the winding frame of the embodiment of the utility model from another perspective.

[0027] Figure 3 It is an exploded structure schematic view of the two magnetic cores and the winding frame of the embodiment of the utility model.

[0028] Figure 4 It is Figure 1 a cross-sectional structure schematic view.

[0029] Figure 5 is Figure 1 The schematic diagram of the three-dimensional structure of the magnetic core.

[0030] Figure 6 is the schematic diagram of the three-dimensional structure of the winding frame and the winding of the embodiment of the utility model.

[0031] Figure 7 is Figure 6 The schematic diagram of the three-dimensional structure after wrapping the winding with the insulating tape.

[0032] Figure 8 is Figure 1 The schematic diagram of the three-dimensional structure after wrapping the two magnetic cores with the tape and gluing.

[0033] Figure 9 is the schematic diagram of the three-dimensional structure of the clamping piece of the embodiment of the utility model.

[0034] Figure 10 is the schematic diagram of the three-dimensional structure of the two magnetic cores and the winding frame of the inductor of another embodiment of the utility model, wherein the first convex parts are arranged oppositely on the substrate part.

[0035] Figure 11 is Figure 10 The schematic diagram of the exploded structure.

[0036] Figure 12 is the schematic diagram of the three-dimensional structure of the two magnetic cores and the winding frame of the inductor of another embodiment of the utility model, wherein the shape of the middle column and the winding frame body is track-shaped.

[0037] Figure 13 is Figure 12 The schematic diagram of the exploded structure.

[0038] Figures 14 to 18 Different examples of the air gap formed between the two magnetic cores. DETAILED DESCRIPTION

[0039] In order to make the technical content, construction features and achieved effects of the utility model more apparent, clear and easy to understand, the specific embodiments of the utility model are described in detail below in combination with the drawings.

[0040] In order to make the technical content, construction features and achieved effects of the utility model more apparent, clear and easy to understand, the specific embodiments of the utility model are described in detail below in combination with the drawings.

[0041] Please refer to Figures 1 to 9 The utility model discloses an inductor, inductor includes two magnetic cores 10 and a winding group, magnetic core 10 includes base plate part 11, and the middle part and the periphery of base plate part 11 respectively stretch the column 12 and the limiting side 13 of one side to same side, and form the wire frame mounting space 14 between column 12 and limiting side 13, and limiting side 13 has two first notches 131 at the opposite sides of column 12;Winding group includes winding frame 30 and winding 50, and winding frame 30 includes wire frame main body 31 and the outgoing line portion 32 connected in wire frame main body 31 one side, and wire frame main body 31 forms and is equipped with the winding groove 312 around assembly hole 311 of upper and lower through-penetrating, and winding 50 is wound in winding groove 312;Two magnetic cores 10 are assembled in the upper and lower sides of winding group (based on the orientation in the drawing, only for convenient description), wherein the column 12 of two magnetic cores 10 stretches into assembly hole 311 and forms air gap X between, and wire frame main body 31 and winding 50 are located in the wire frame mounting space 14 of two magnetic cores 10 (the limiting side 13 of two magnetic cores 10 generally mutually adheres), and the first notches 131 of two magnetic cores 10 are opposite each other, and the outgoing line portion 32 is located at the outside of one set of opposite first notches 131, and another set of opposite first notches 131 carries out point gum to fix two magnetic cores 10 and winding group.

[0042] In order to facilitate processing, two magnetic cores 10 can be first processed into the same shape, and then locally trimmed according to the use requirements, for example, trimming the column 12 of one or both of the magnetic cores 10 to obtain the required air gap X. The two magnetic cores 10 after trimming can be the same or different.

[0043] In the utility model embodiment, the limiting side 13 has two first notches 131 at the opposite sides of the column 12. After the two magnetic cores 10 and the winding group are assembled, the first notches 131 of the two magnetic cores 10 are opposite each other, and the outgoing line portion 32 is located at the outside of one set of opposite first notches 131. Another set of opposite first notches 131 carries out point gum to fix the two magnetic cores 10 and the winding group. Since the two magnetic cores 10 and the winding group are fixed by point gum at the other set of opposite first notches 131, the two magnetic cores 10 and the winding group can be combined together by the colloid 60, which is conducive to the firm combination between the two magnetic cores 10 and the winding group.

[0044] Specifically, the plug-in pin 33 is arranged on the outgoing line portion 32, and the inductor is plugged into the circuit board through the plug-in pin 33. The plug-in pin 33 is used for welding with the outgoing line end of the winding.

[0045] More specifically, the plug-in direction of the plug-in pin 33 is perpendicular to the extension direction of the assembly hole 311 and away from the wire frame main body 31.

[0046] In some embodiments, the substrate portion 11 is provided with a groove 111 on one side of the middle column 12, the groove 111 penetrates outwardly at a position corresponding to the first gap 131 of the substrate portion 11, and the adhesive 60 is filled into the groove 111 corresponding to the other set of opposite first gaps 131. Since the adhesive 60 can be filled into the corresponding groove 111 when dispensing the adhesive at the other set of opposite first gaps 131, the coil former 30 and the magnetic core 10 are fixed inside the inductor, thereby further enhancing the binding strength between the magnetic core 10 and the winding set, and ensuring more reliable performance of the inductor.

[0047] It can be understood that the groove 111 can be provided only corresponding to one first gap 131 (penetrating towards the first gap 131), and the groove 111 is used to fill the adhesive 60. However, it is not limited to this, for example, two grooves 111 can be provided corresponding to two first gaps 131, one groove 111 is used to fill the adhesive 60, and the other groove 111 can not penetrate the corresponding first gap 131, or one groove 111 can penetrate towards two first gaps 131, and the like.

[0048] Specifically, the substrate portion 11 is provided with a groove 111 penetrating outwardly corresponding to each of the two first gaps 131; and the wire outlet portion 32 can be assembled corresponding to any first gap 131 of the magnetic core 10. That is, when the coil former 30 and the magnetic core 10 are assembled, the direction can not be considered whether it is reversed, and when the wire outlet portion 32 is assembled corresponding to any first gap 131, the groove 111 corresponding to the other first gap 131 can be used to fill the adhesive 60.

[0049] Further, the coil former body 31 includes two oppositely arranged side plate portions 313 defining a winding groove 312, and the same side of the outer edges of the two side plate portions 313 is respectively connected with a wire outlet portion 32. The side plate portion 313 is provided with a first protrusion 314 protruding away from the winding groove 312 at a position close to the wire outlet portion 32, and the first protrusion 314 is positioned in the corresponding groove 111, which can limit the lateral movement of the first protrusion 314. Since the side plate portion 313 is provided with a first protrusion 314 protruding away from the winding groove 312 at a position close to the wire outlet portion 32, and the first protrusion 314 is positioned in the corresponding groove 111, thereby limiting the lateral movement (i.e. unable to move laterally or only a small movement) of the first protrusion 314, when the magnetic core 10 and the coil former 30 are assembled, when the wire outlet portion 32 is assembled corresponding to any first gap 131, the groove 111 corresponding to the first gap 131 can be positioned in cooperation with the first protrusion 314, and the groove 111 corresponding to the other first gap 131 can be used to fill the adhesive 60, thereby further facilitating the reliable fixation between the magnetic core 10 and the coil former 30.

[0050] Of course, the bobbin 30 and the magnetic core 10 can also be arranged to be assembled only in a fixed direction, i.e. the wire outlet 32 can be assembled only to a determined first gap 131, and cannot be assembled to another first gap 131.

[0051] In some embodiments, the substrate 11 is provided with a first recess 111a on the side extending from the middle column 12; the bobbin body 31 comprises two oppositely arranged side plate portions 313 defining a winding groove 312, and the side plate portions 313 are provided with a first protrusion 314 on the side facing away from the winding groove 312, and the first protrusion 314 is positioned in the corresponding first recess 111a. Since the side plate portions 313 are provided with the first protrusion 314 on the side facing away from the winding groove 312, and the first protrusion 314 is positioned in the corresponding first recess 111a, the reliable assembly of the magnetic core 10 and the bobbin 30 is facilitated.

[0052] Specifically, the first recess 111a is arranged corresponding to the first gap 131; the outer edges of the two side plate portions 313 are respectively connected with the wire outlet 32, and the side plate portions 313 are provided with the first protrusion 314 on the side facing away from the winding groove 312 near the wire outlet 32, and the first recess 111a can limit the lateral movement of the first protrusion 314.

[0053] Further, the substrate 11 is provided with the first recess 111a on the side extending from the middle column 12 corresponding to one first gap 131, and is provided with a second recess 111b penetrating outwardly corresponding to the other first gap 131; the gel 60 is filled into the second recess 111b corresponding to the other group of first gaps 131. The first recess 111a and the first protrusion 314 are positioned, and the gel 60 enters the inductor through the second recess 111b, thereby facilitating the reliable assembly of the magnetic core 10 and the bobbin 30.

[0054] When the wire outlet 32 can be assembled corresponding to any first gap 131, i.e. the magnetic core 10 and the bobbin 30 can be assembled without considering the direction, the first recess 111a and the second recess 111b are not fixed.

[0055] In specific examples, the first protrusion 314 and the first recess 111a each comprise two parallel side walls, and the width of the first recess 111a is equivalent to or slightly larger than the width of the first protrusion 314. Of course, it is not limited to this, as long as it can play a positioning role.

[0056] Please refer to Figure 10 and Figure 11In different examples, the first recess 111a is arranged in the first notch 131 corresponding to the one side of the substrate 11 extending out of the middle column 12, and the first protrusion 314 is arranged on the side of the side plate 313 opposite to the winding groove 312 and close to or away from the wire outlet 32.

[0057] In some embodiments, the wire frame body 31 includes two oppositely arranged annular side plates 313 defining the winding groove 312, and the side plate 313 has a connecting portion 315 corresponding to the one side of the substrate 11 extending out of the middle column 12, and the wire outlet 32 is connected to the side plate 313 through the connecting portion 315, and the two sides of the wire outlet 32 extend outward beyond the two sides of the connecting portion 315, and at least part of the wire outlet 32 is located on the side of the side plate 313 opposite to the winding groove 312, and the surface of the wire outlet 32 on the side of the connecting portion 315 protrudes outward to form a second protrusion 321 corresponding to the first notch 131; the first notch 131 penetrates the substrate 11; the second protrusion 321 is arranged in the first notch 131 away from the substrate 11 and positioned at the other end of the first notch 131. Through the cooperation of the first notch 131 and the second protrusion 321, the magnetic core 10 and the wire frame 30 are quickly and reliably assembled.

[0058] Specifically, the first recess 111 corresponding to the first notch 131 is formed on the side of the substrate 11 extending out of the middle column 12; the first protrusion 314 is arranged on the side of the side plate 313 opposite to the winding groove 312 and close to the wire outlet 32, and the first protrusion 314 is positioned in the first recess 111, and the first recess 111 can limit the lateral movement of the first protrusion 314. Through the cooperation of the first notch 131 and the second protrusion 321 and the cooperation of the first recess 111 and the first protrusion 314, the magnetic core 10 and the wire frame 30 are more reliably assembled.

[0059] In some embodiments, the recesses 111, the first recesses 111a, and the second recesses 111b mentioned in the above different embodiments are shallow recesses to reduce the impact on the magnetic core 10.

[0060] In some embodiments, the two groups of oppositely arranged first notches 131 are glued to fix the two magnetic cores 10 and the wire group, thereby more favorably assembling the magnetic core 10 and the wire frame 30.

[0061] Please refer to Figure 7 In some embodiments, the wire 50 is wrapped with an insulating tape 70 on the outside.

[0062] Please refer to Figure 8In some embodiments, at least one tape 80 is wound around the outer surfaces of the two magnetic cores 10 for fixing the two magnetic cores 10, thereby facilitating reliable assembly of the inductor.

[0063] Specifically, the tape 80 is wound around the outer surfaces of the two magnetic cores 10 without the first notches 131.

[0064] Specifically, the limiting side portions 13 have heat dissipation holes 132 respectively located at the other two opposite sides of the middle columns 12, and the tape 80 is wound around the heat dissipation holes 132. In a specific example, the heat dissipation holes 132 are heat dissipation notches 132, and the heat dissipation notches 132 of the two magnetic cores 10 are opposite to each other, and the tape 80 is wound around the two sides of the heat dissipation notches 132, respectively.

[0065] Please refer to Figure 8 and Figure 9 Specifically, the opposite side edges of the one side of the substrate portion 11 opposite to the middle columns 12 are respectively provided with buckle portions 112, the buckle portions 112 and the first notches 131 are located at different side edges of the magnetic cores 10, the buckle portions 112 of the two magnetic cores 10 are opposite to each other, and each set of opposite buckle portions 112 is provided with a clamping piece 90, and the tape 80 is wound around the two sides of the clamping piece 90, respectively.

[0066] Please refer to Figures 1 to 3 In some embodiments, the limiting side portions 13 have heat dissipation notches 132 respectively located at the other two opposite sides of the middle columns 12, and the heat dissipation notches 132 of the two magnetic cores 10 are opposite to each other. Through the arrangement of the heat dissipation notches 132, heat dissipation is facilitated.

[0067] In a specific example, the magnetic cores 10 are square as a whole, and the two first notches 131 and the two heat dissipation notches 132 divide the limiting side portions 13 into four parts located at the corners. Of course, this is not limited.

[0068] It should be noted that the heat dissipation notches 132 are not necessary structures, and the heat dissipation structure is not limited to the form of notches.

[0069] Please refer to Figure 8 and Figure 9 In some embodiments, the opposite side edges of the one side of the substrate portion 11 opposite to the middle columns 12 are respectively provided with buckle portions 112, the buckle portions 112 of the two magnetic cores 10 are opposite to each other, and each set of opposite buckle portions 112 is provided with a clamping piece 90. By clamping the clamping piece 90 in the corresponding buckle portions 112 of the two magnetic cores 10, reliable combination of the two magnetic cores 10 is facilitated. It should be noted that the clamping piece 90 and the buckle portion 112 for clamping the clamping piece 90 are not necessary structures.

[0070] Specifically, the clamping piece 90 comprises a clamping arm 91 and a clamping portion 92 connected at both ends of the clamping arm 91; the buckle portion 112 comprises a clamping groove 1121 formed on the side face of the base plate portion 11 opposite to the middle column 12 and penetrating through the base plate portion 11, and a protrusion 1122 protruding outward from the bottom wall of the clamping groove 1121, and the clamping portion 92 is clamped in the clamping groove 1121, and the protrusion 1122 stops the clamping portion 92.

[0071] Please combine Figure 1 In some embodiments, the magnetic core 10 is square as a whole, and the magnetic core 10 is provided with chamfers 15 at four corners of the magnetic core 10, and the chamfers 15 are formed on the base plate portion 11 and the limiting side portion 13.

[0072] It should be noted that the specific form of the magnetic core 10 and the winding frame 30 is not specifically limited in the utility model. The drawings show an example in which the magnetic core 10 is square as a whole, wherein Figures 1 to 11 In the example of the magnetic core 10, the width of the magnetic core 10 in the insertion direction is not much different from the width of the magnetic core 10 perpendicular to the insertion direction (the latter is larger), the middle column 12 is circular, and the line frame main body 31 of the winding frame 30 is circular as a whole. In the example of the magnetic core 10, Figure 12 and Figure 13 In the example of the magnetic core 10, the width of the magnetic core 10 in the insertion direction is significantly larger than the width of the magnetic core 10 perpendicular to the insertion direction, the middle column 12 is in the shape of a racetrack, and the line frame main body 31 of the winding frame 30 is in the shape of a racetrack. Of course, the drawings show only an example, and the magnetic core 10 and the winding frame 30 of the utility model can have various different forms.

[0073] It should be noted that the middle columns 12 of the two magnetic cores 10 can form air gaps X in different ways, as long as the working needs can be met. For example, Figures 14 to 16 In the example of the magnetic core 10, the two middle columns 12 are both formed with end faces 120 parallel to the base plate portion 11, and the air gap X is formed between the end faces 120 of the two middle columns 12, wherein Figure 14 In the example of the magnetic core 10, the lengths of the two middle columns 12 are the same, Figure 15 In the example of the magnetic core 10, the length of one middle column 12 is greater than the length of the other middle column 12, Figure 16 In the example of the magnetic core 10, the length of one middle column 12 is much greater than the length of the other middle column 12. In Figure 17 In the example shown in the drawings, the two middle columns 12 are both formed with end faces 120 parallel to the base plate portion 11, but one end face 120 of one middle column 12 protrudes on one side to form a protrusion 121 facing the end face 120 of the other middle column 12, and the air gap X is formed between the end face 120 and the protrusion 121 of one middle column 12 and the end face 120 of the other middle column 12. In Figure 18In the example shown in FIG. 1, the two middle columns 12 are each formed with an end face 120 parallel to the base plate 11, and the end faces 120 of the two middle columns 12 are provided with mutually staggered protrusions 121, and the air gap X is defined by the end faces 120 and the protrusions 121 of the two middle columns 12. Of course, the above is merely an individual example.

[0074] The above is only a preferred embodiment of the present application, and its role is to facilitate the understanding and implementation of those skilled in the art, and of course cannot limit the scope of the present application. Therefore, equivalent changes made in accordance with the scope of the present application are still within the scope of the present application.

Claims

1. An inductor characterized by, The inductor comprises two magnetic cores and a winding group, the magnetic core comprises a base plate part, the middle part and the periphery of the base plate part respectively extend a middle column and a limiting side part to the same side, the middle column and the limiting side part form a bobbin mounting space, the limiting side part has two first notches on the opposite sides of the middle column; the winding group comprises a bobbin and a winding, the bobbin comprises a bobbin main body and a wire outlet part connected to one side of the bobbin main body, the bobbin main body is formed with an assembly hole penetrating from top to bottom and a winding groove arranged around the assembly hole, the winding is arranged in the winding groove; two magnetic cores are respectively assembled on the upper and lower sides of the winding group, the middle columns of the two magnetic cores extend into the assembly hole and form an air gap between them, the bobbin main body and the winding are located in the bobbin mounting space of the two magnetic cores, the first notches of the two magnetic cores are opposite to each other, the wire outlet part is located outside one set of opposite first notches, and the other set of opposite first notches are glued to fix the two magnetic cores and the winding group.

2. The inductor of claim 1, wherein one side of the base plate part extending the middle column is formed with a groove, the groove penetrates outward at the position corresponding to the first notch of the base plate part, and the glue is filled into the groove corresponding to the other set of opposite first notches.

3. The inductor of claim 2, wherein the base plate part is provided with the groove penetrating outward corresponding to the two first notches; the wire outlet part can be assembled corresponding to any first notch of the magnetic core.

4. The inductor of claim 3, wherein the bobbin main body comprises two oppositely arranged annular side plate parts defining the winding groove, the same side of the outer edges of the two side plate parts is respectively connected with the wire outlet part, the side plate part is provided with a first protrusion near the wire outlet part and away from the winding groove, the first protrusion is positioned in the corresponding groove which can limit the lateral movement of the first protrusion.

5. The inductor of claim 1, wherein one side of the base plate part extending the middle column is formed with a first groove; the bobbin main body comprises two oppositely arranged annular side plate parts defining the winding groove, one side of the outer edges of the two side plate parts is respectively connected with the wire outlet part, the side plate part is provided with a first protrusion away from the winding groove, and the first protrusion is positioned in the corresponding first groove.

6. The inductor of claim 5, wherein the first groove is arranged corresponding to the first notch; the same side of the outer edges of the two side plate parts is respectively connected with the wire outlet part, and the side plate part is provided with the first protrusion away from the winding groove near the wire outlet part.

7. The inductor of claim 6, wherein one side of the base plate part extending the middle column is provided with the first groove corresponding to one first notch and a second groove penetrating outward corresponding to the other first notch; the glue is filled into the second groove corresponding to the other set of opposite first notches.

8. The inductor of claim 1, wherein: the bobbin body comprises two oppositely arranged annular side plate portions defining the winding groove, one side of the side plate portion extends outwardly at a position corresponding to one of the first notches, the wire outlet portion is connected to the side plate portion through the connecting portion, the wire outlet portion extends outwardly beyond the two side edges of the connecting portion, at least part of the wire outlet portion is located on the side of the side plate portion away from the winding groove, and the surface of the wire outlet portion on the side corresponding to the connecting portion is provided with a second protrusion corresponding to one of the first notches; the first notch penetrates the base plate portion; and the second protrusion is fitted and positioned at the other end of the first notch away from the base plate portion.

9. The inductor of claim 8, wherein: the base plate portion is provided with a first groove corresponding to the first notch on one side of the middle column; the side plate portion is provided with a first protrusion on the side away from the winding groove near the wire outlet portion, the first protrusion is positioned in the first groove, and the first groove can limit the lateral movement of the first protrusion.

10. The inductor of claim 1, wherein: the two sets of oppositely arranged first notches are glued to fix the two magnetic cores and the winding group.

11. The inductor of claim 1, wherein: the outer side of the winding is wrapped with an insulating tape.

12. The inductor of claim 1, wherein: at least one layer of tape for fixing the two magnetic cores is wound around the outer surface of the two magnetic cores.

13. The inductor of claim 1, wherein: the limiting side portions have heat dissipation notches respectively on the other two opposite sides of the middle column, and the heat dissipation notches of the two magnetic cores are opposite to each other.

14. The inductor of claim 1, wherein: the base plate portion is provided with a buckle portion at the opposite edges of one side away from the middle column, the buckle portions of the two magnetic cores are opposite to each other, and each set of opposite buckle portions is provided with a clamping member.

15. The inductor of claim 1, wherein: the magnetic core is square as a whole, the magnetic core is provided with chamfers at four corners, and the chamfers are formed on the base plate portion and the limiting side portions.

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