Reel of inductor and inductor

Abstract

The reel comprises a reel body, the reel body comprises an annular wall, an assembly hole is formed in the inner side of the annular wall, a middle column of a magnetic core can be inserted into the assembly hole, the outer wall face of the annular wall is a winding face, and the two ends of the annular wall extend outwards to surround two side plate parts of the annular wall. The two side plate parts and the winding surface define a winding groove, the width of each side plate part in a first direction is larger than that of each side plate part in a second direction, the first direction and the second direction are perpendicular to the extension direction of the assembly hole, the outer edges of the two side plate parts are connected with wire outlet parts, the wire outlet parts are located on one side of the side plate parts in the first direction, and the wire outlet parts are located on the other side of the side plate parts in the second direction. The wire outlet part is provided with a plugging pin, and the plugging direction of the plugging pin is the side, deviating from the wire holder main body, in the first direction. According to the utility model, the utilization rate of the circuit board is improved or the circuit board is miniaturized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of inductor, especially to a winding frame of inductor and inductor. BACKGROUND

[0002] A common inductor includes two magnetic cores and a winding set. The magnetic core includes a base plate part, a middle part and a peripheral part of the base plate part respectively extend a middle column and a limiting side part to the same side, the middle column is circular, and a wire frame mounting space is formed between the middle column and the limiting side part. The winding set includes a winding frame and a winding, the winding frame includes a wire frame main body, the wire frame main body includes a circular ring wall, a circular assembly hole adapted to be inserted into the middle column is formed on the inner side of the circular ring wall, a circular ring winding surface is formed on the outer wall surface of the circular ring wall, two side plate parts are extended outward from both ends of the circular ring wall, and a winding groove is defined by the two side plate parts and the winding surface. The outer edge of the two side plate parts is connected with a wire outlet part in the position area in the first direction perpendicular to the assembly hole, the wire outlet part is provided with an insertion pin, and the insertion direction of the insertion pin is the side away from the wire frame main body in the first direction. However, the side plate part is circular, so that the width of the side plate part in the second direction perpendicular to the insertion direction is large, and the magnetic core also has a large width in the second direction in order to adapt to the side plate part. As a result, when the inductor is inserted into the circuit board through the insertion pin, a large circuit board area is occupied, which is not conducive to the improvement of the utilization rate of the circuit board or the miniaturization of the circuit board. SUMMARY

[0003] The utility model discloses a winding frame of inductor and inductor, which is conducive to the improvement of the utilization rate of the circuit board or the miniaturization of the circuit board.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a winding frame of inductor, the winding frame includes wire frame main body, the wire frame main body includes annular wall, the inner side of annular wall forms assembly hole, the assembly hole is configured for the middle column of magnetic core and inserts, the outer wall surface of annular wall is winding surface, the both ends of annular wall extend outward and encircle two side plate parts of annular wall, two side plate parts and winding surface define winding groove, the width of side plate part in first direction is greater than in second direction, the first direction and second direction are perpendicular to the extension direction of assembly hole, the first direction and second direction are perpendicular, the outer edge of two side plate parts is connected with wire outlet part, the wire outlet part is located in the side of side plate part in first direction, the wire outlet part is equipped with insertion pin, and the insertion direction of insertion pin is the side away from wire frame main body in first direction.

[0005] Optionally, the winding groove has a uniform depth.

[0006] Optionally, a cross section of the wire slot in a width direction is in a shape of a racetrack, an ellipse or a rounded rectangle, and a length direction of the racetrack, the ellipse or the rounded rectangle is the second direction.

[0007] Optionally, the annular wall has a uniform thickness.

[0008] Optionally, a cross section of the annular wall in a width direction is in a shape of a racetrack, an ellipse or a rounded rectangle, and a length direction of the racetrack, the ellipse or the rounded rectangle is the second direction.

[0009] Optionally, a first protrusion is protruded on a side of the side plate part facing away from the wire slot, and the first protrusion is configured to be positioned in a first groove on an inner wall of the base plate part of the magnetic core.

[0010] Optionally, the side plate part extends a connecting part in the first direction, the wire outlet part is connected with the side plate part through the connecting part, two sides of the wire outlet part in the second direction outwardly exceed two side edges of the connecting part, at least part of the wire outlet part is located on a side of the side plate part facing away from the wire slot, and a second protrusion is protruded on a surface of the wire outlet part facing the side where the connecting part is located; the second protrusion is configured to be fitted to the first notch of the magnetic core and positioned in the first notch.

[0011] In order to achieve the above-mentioned purpose, the utility model provides a kind of inductor, the inductor includes two magnetic cores and the bobbin as described above, the magnetic core includes base plate part, the middle part and the periphery of the base plate part respectively extend to the same side middle column and limiting side part, wire rack installation space is formed between the middle column and the limiting side part, the limiting side part has first notch on its side, wire is wound around wire slot of the bobbin, two the magnetic cores are respectively fitted on the opposite sides of the bobbin, wherein the middle column of two the magnetic cores extends into the assembly hole and forms air gap between, the bobbin main body is adaptively arranged in the wire rack installation space of two the magnetic cores, the first notch of two the magnetic cores is oppositely arranged, and the wire outlet part is located on the outside of the first notch.

[0012] Optionally, the middle column is adaptively inserted into the assembly hole.

[0013] Optionally, the magnetic core is overall square, including two opposite first sides in the first direction and two opposite second sides in the second direction, the distance between the two first sides is greater than the distance between the two second sides, and the first notch is provided corresponding to the first side.

[0014] Optionally, the first side and the second side are connected by chamfering.

[0015] Optionally, the side plate part extends a connecting part corresponding to the first notch in the first direction, the wire outlet part is connected with the side plate part through the connecting part, two sides of the wire outlet part in the second direction outwardly exceed two side edges of the connecting part, at least part of the wire outlet part is located on the side of the side plate part away from the wire winding groove, and a second protruding part corresponding to the first notch is protruded on the surface of the wire outlet part towards the side where the connecting part is located; the first notch penetrates the base plate part; and the second protruding part is assembled and positioned at the other end of the first notch away from the base plate part.

[0016] Optionally, a first protruding part is protruded on the side of the side plate part away from the wire winding groove; the base plate part is provided with a first recess corresponding to the first notch; and the first protruding part is positioned in the first recess to limit lateral movement of the first protruding part.

[0017] In the embodiment of the utility model, the width of the two side plate parts of the wire winding frame in the first direction is greater than the width in the second direction, that is, the width of the two side plate parts in the plug-in direction is greater than the width in the direction perpendicular to the plug-in direction, thereby facilitating reduction of the width of the magnetic core sleeved on the outer side of the wire winding frame in the direction perpendicular to the plug-in direction, that is, facilitating reduction of the width of the inductor as a whole in the direction perpendicular to the plug-in direction, thereby facilitating reduction of the area of the circuit board occupied by the inductor when the inductor is plugged into the circuit board through the plug-in pin, and thereby facilitating improvement of the utilization rate of the circuit board or miniaturization of the circuit board. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the three-dimensional structure schematic view of the two magnetic cores and the wire winding frame of the inductor in the embodiment of the utility model.

[0019] Figure 2 is the three-dimensional structure schematic view of the two magnetic cores and the wire winding frame in another view of the embodiment of the utility model.

[0020] Figure 3 is the exploded structure schematic view of the two magnetic cores and the wire winding frame in the embodiment of the utility model.

[0021] Figure 4 is the sectional structure schematic view of Figure 1 .

[0022] Figure 5 is the three-dimensional structure schematic view of the wire winding frame and the wire winding in the embodiment of the utility model.

[0023] Figure 6 is the three-dimensional structure schematic view of Figure 5 the wire winding after wrapping with the insulating tape.

[0024] Figure 7 is the three-dimensional structure schematic view of Figure 1The schematic diagram of the three-dimensional structure after winding the adhesive tape outside the two magnetic cores and dispensing.

[0025] Figures 8 to 12 Different examples of forming air gaps between the two magnetic cores. DETAILED DESCRIPTION

[0026] In order to make the technical content, structural features and effects of the present application more apparent, clear and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0027] In order to make the technical content, structural features and effects of the present application more apparent, clear and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0028] Please refer to Figures 1 to 12 The embodiment of the present application discloses an inductor. The inductor comprises two magnetic cores 10 and a bobbin 30.

[0029] The magnetic core 10 comprises a base plate part 11, the middle part and the periphery of the base plate part 11 respectively extend a middle column 12 and a limiting side part 13 to the same side, a bobbin mounting space 14 is formed between the middle column 12 and the limiting side part 13, and the limiting side part 13 has a first notch 131 on one side thereof.

[0030] Corresponding to the above-mentioned magnetic core 10, the bobbin 30 comprises a bobbin main body 31, the bobbin main body 31 comprises an annular wall 311, an assembly hole 312 is formed on the inner side of the annular wall 311, the assembly hole 312 is configured to be inserted with the middle column 12 of the magnetic core 10, the outer wall surface of the annular wall 311 is a winding surface 313, both ends of the annular wall 311 extend outward to form two side plate parts 314 surrounding the annular wall 311, the two side plate parts 314 and the winding surface 313 define a winding groove 315, and the winding groove 315 is wound with a winding wire 50. The width of the side plate part 314 in the first direction is greater than the width in the second direction, the first direction and the second direction are perpendicular to the extension direction of the assembly hole 312, the first direction and the second direction are perpendicular, and the outer edges of the two side plate parts 314 are connected with a wire outlet part 32, the wire outlet part 32 is located on one side of the side plate part 314 in the first direction, the wire outlet part 32 is provided with a plug-in pin 33, and the plug-in direction of the plug-in pin 33 is away from the side of the bobbin main body 31 in the first direction. The plug-in pin 33 is used for welding with the wire outlet end of the winding wire.

[0031] In the assembly, the two magnetic cores 10 are respectively assembled on opposite sides of the bobbin 30, wherein the middle columns 12 of the two magnetic cores 10 extend into the assembly holes 312 oppositely and form an air gap X therebetween, the bobbin main body 31 is adapted to be arranged in the bobbin mounting space 14 of the two magnetic cores 10, the first notches 131 of the two magnetic cores 10 are arranged oppositely, and the wire outlet 32 is located outside the first notches 131.

[0032] In the embodiment of the utility model, the width of the two side plate parts 314 of the bobbin 30 in the first direction is greater than the width in the second direction, that is, the width of the two side plate parts 314 in the plug-in direction is greater than the width in the direction perpendicular to the plug-in direction, thereby facilitating the reduction of the width of the magnetic core 10 sleeved outside the bobbin 30 in the direction perpendicular to the plug-in direction, that is, facilitating the reduction of the width of the inductor in the direction perpendicular to the plug-in direction, thereby facilitating the reduction of the area of the circuit board occupied by the inductor when the inductor is plugged into the circuit board through the plug-in pin 33, and thereby facilitating the improvement of the utilization rate of the circuit board or the miniaturization of the circuit board.

[0033] Please combine Figure 3 In some embodiments, the winding groove 315 has a uniform depth. The height of each position of the side plate part 314 along the circumferential direction is substantially the same. Since the winding groove 315 has a uniform depth, in the case that the width of the winding groove 315 and the circumference of the winding surface 313 are the same, the winding groove 315 can wind the same length of wire. That is, under the premise that the winding groove 315 can wind the same length of wire, the width of the two side plate parts 314 in the plug-in direction is greater than the width in the direction perpendicular to the plug-in direction, thereby facilitating the reduction of the width of the inductor in the direction perpendicular to the plug-in direction.

[0034] Please combine Figure 3 In some embodiments, the cross section of the winding groove 315 in the width direction is in the shape of a racetrack, and the longitudinal axis direction of the racetrack is the second direction. Similarly, the shape of the side plate part 314 can also be in the shape of a racetrack. Of course, the racetrack is only an example, and the shape of the cross section of the winding groove 315 in the width direction and the shape of the side plate part 314 can be other various different shapes, such as an ellipse and a rounded rectangle (not a square), and for the ellipse, the long axis direction is the second direction, and for the rounded rectangle, the direction along the long side of the rectangle is the second direction. The above longitudinal axis direction, long axis direction and direction along the long side of the rectangle can be uniformly defined as a length direction.

[0035] It needs to be emphasized that the above racetrack, ellipse and rounded rectangle are only examples and are not limited thereto.

[0036] Please combine Figure 3In some embodiments, the annular wall 311 has a uniform thickness, i.e. the shape of the assembly hole 312 and the shape of the winding face 313 are consistent.

[0037] Specifically, the shape of the cross section of the annular wall 311 in the width direction thereof is a racetrack shape, the longitudinal axis direction of the racetrack shape is the second direction, and correspondingly, the assembly hole 312 is defined by the inner wall surface of the annular wall 311 in a corresponding shape. Of course, the racetrack shape is only an example, and the shape of the cross section of the annular wall 311 in the width direction thereof can be various other shapes, such as an ellipse and a rounded rectangle (not a square), and for the ellipse, the long axis direction is the second direction, and for the rounded rectangle, the direction along the long side of the rectangle is the second direction. The above longitudinal axis direction, long axis direction and direction along the long side of the rectangle can be uniformly defined as a length direction.

[0038] It needs to be emphasized that the above racetrack shape, ellipse and rounded rectangle are only examples of the shape of the cross section of the annular wall 311 in the width direction thereof, and are not limited thereto.

[0039] Preferably, the middle column 12 of the magnetic core 10 has a shape adapted to the assembly hole 312. However, it is not limited thereto.

[0040] Please refer to Figure 1 In some embodiments, the magnetic core 10 is in a square shape as a whole, including two opposite first sides 15 in the first direction and two opposite second sides 16 in the second direction, the distance between the two first sides 15 is greater than the distance between the two second sides 16, and the first notch 131 is arranged corresponding to one of the first sides 15.

[0041] Specifically, the first side 15 and the second side 16 are connected by a chamfer 17.

[0042] Please refer to Figures 1 to 4 In some embodiments, the side plate part 314 is provided with a first protrusion 316 on the side away from the winding groove 315, and the base plate part 11 is provided with a first recess 111 corresponding to the first notch 131; the first protrusion 316 is positioned in the first recess 111 to limit the lateral movement of the first protrusion 316. Since the side plate part 314 is provided with the first protrusion 316 on the side away from the winding groove 315, and the first protrusion 316 is positioned in the corresponding first recess 111, it is thus beneficial for the reliable assembly of the magnetic core 10 and the winding frame 30.

[0043] Specifically, the first recess 111 is arranged corresponding to the first notch 131; the side plate part 314 is provided with the first protrusion 316 on the side away from the winding groove 315 at a position close to the wire outlet part 32. Of course, the arrangement position and number of the first recess 111 and the first protrusion 316 are not limited.

[0044] Furthermore, the limiting side 13 has two first notches 131 located on opposite sides of the central post 12, and a first groove 111 is provided for each first notch 131. Because of the two first notches 131, the magnetic core 10 and the winding frame 30 can be assembled regardless of their orientation, as the lead-out portion 32 can be assembled at either first notch 131. After the assembly of the magnetic core 10 and the winding frame 30 is completed, adhesive can be applied to both first notches 131.

[0045] The first groove 111 is preferably positioned to extend outward from the first notch 131. The side plate portion 314 may only have a first protrusion 316 protruding from the winding groove 315 near the wire outlet portion 32. In this way, after the magnetic core 10 and the winding frame 30 are assembled, the first groove 111, which does not mate with the first protrusion 316, can be used to fill the adhesive 60 during dispensing (e.g., ...). Figure 7 (As shown).

[0046] In addition, the side plate portion 314 facing away from the winding groove 315 may be provided with a first protrusion 316 at a position near the wire outlet portion 32 and a position away from the wire outlet portion 32, respectively, to correspond to the first groove 111 provided near the two first notches 131.

[0047] Of course, the limiting side 13 may only have a first notch 131, and a second notch may be provided on the side opposite to the first notch 131, or no notch may be provided. The substrate 11 may have a groove corresponding to the second notch. The groove may be used to engage with the protrusion on the side plate 314 for positioning. Of course, if the groove penetrates the second notch, it may also be used to fill the adhesive 60 during dispensing, so that the adhesive 60 enters the inductor.

[0048] Please see Figures 1 to 3 In some embodiments, the side plate portion 314 extends a connecting portion 317 corresponding to the first notch 131 along a first direction. The lead-out portion 32 is connected to the side plate portion 314 through the connecting portion 317. The lead-out portion 32 extends outward from both sides of the connecting portion 317 in a second direction. At least a portion of the lead-out portion 32 is located on the side of the side plate portion 314 opposite to the winding groove 315. A second protrusion 321 corresponding to and fitted to the first notch 131 protrudes from the surface of the lead-out portion 32 toward the side where the connecting portion 317 is located. The first notch 131 penetrates the base plate portion 11. The second protrusion 321 is fitted to the end of the first notch 131 away from the base plate portion 11 and positioned at the other end of the first notch 131. The cooperation of one of the first notches 131 and the second protrusion 321 facilitates the quick and reliable assembly of the magnetic core 10 and the winding frame 30.

[0049] The grooves mentioned in the above embodiments are all shallow grooves to reduce the impact on the magnetic core 10.

[0050] Please refer to Figure 6 In some embodiments, the outer side of the winding 50 is wrapped with an insulating tape 70.

[0051] Please refer to Figure 7 In some embodiments, at least one tape 80 is wound around the outer surface of the two magnetic cores 10 for fixing the two magnetic cores 10, thereby facilitating reliable assembly of the inductor.

[0052] Specifically, the limiting side 13 has heat dissipation holes 132 respectively located at the other two opposite sides of the middle column 12, and the tape avoids winding through 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 on the two sides of the heat dissipation notches 132 respectively.

[0053] Please refer to Figure 1 In some embodiments, the limiting side 13 has heat dissipation notches 132 respectively located at the other two opposite sides of the middle column 12, and the heat dissipation notches 132 of the two magnetic cores 10 are opposite to each other. By providing the heat dissipation notches 132, heat dissipation is facilitated.

[0054] In a specific example, the magnetic core 10 is square as a whole, and the two first notches 131 and the two heat dissipation notches 132 divide the limiting side 13 into four parts located at the corners. Of course, this is not limited.

[0055] 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.

[0056] 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 8 to 10 In an example, the two middle columns 12 are formed with end faces 120 parallel to the base plate part 11, and the air gap X is formed between the end faces 120 of the two middle columns 12. Figure 8 In an example, the lengths of the two middle columns 12 are the same, Figure 9 In an example, the length of one middle column 12 is greater than the length of the other middle column 12, Figure 10 In an example, the length of one middle column 12 is much greater than the length of the other middle column 12. In Figure 11 In the example shown, the two middle columns 12 are formed with end faces 120 parallel to the base plate part 11, but one end face 120 of one middle column 12 protrudes on one side to form a boss 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 boss 121 of one middle column 12 and the end face 120 of the other middle column 12. In Figure 12In 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.

[0057] The above merely discloses preferred examples of the present application, and the purpose is to facilitate those skilled in the art to understand and implement the present application. Of course, it cannot be used to limit the scope of the present application. Therefore, equivalent changes made in accordance with the scope of the present application still fall within the scope of the present application.

Claims

1. A bobbin for an inductor, characterized by, The bobbin comprises a bobbin body, the bobbin body comprises a ring wall, an inner side of the ring wall forms an assembly hole configured for inserting a middle column of a magnetic core, an outer wall surface of the ring wall is a winding surface, two ends of the ring wall extend outward to form two side plate portions surrounding the ring wall, the two side plate portions and the winding surface define a winding groove, a width of the side plate portion in a first direction is greater than a width of the side plate portion in a second direction, the first direction and the second direction are perpendicular to an extension direction of the assembly hole, the first direction and the second direction are perpendicular to each other, an outer edge of the two side plate portions is connected with a wire outlet portion, the wire outlet portion is located on one side of the side plate portion in the first direction, the wire outlet portion is provided with an insertion pin, an insertion direction of the insertion pin is away from the bobbin body on the one side in the first direction.

2. The bobbin for an inductor according to claim 1, wherein The winding groove has a uniform depth.

3. The bobbin for an inductor according to claim 1 or 2, characterized in that, A shape of a cross section of the winding groove in a width direction thereof is a racetrack shape, an oval shape or a rounded rectangular shape, a length direction of the racetrack shape, the oval shape or the rounded rectangular shape is the second direction.

4. The bobbin of claim 1 or 2, wherein The ring wall has a uniform thickness.

5. The bobbin for an inductor of claim 4, wherein, A shape of a cross section of the ring wall in a width direction thereof is a racetrack shape, an oval shape or a rounded rectangular shape, a length direction of the racetrack shape, the oval shape or the rounded rectangular shape is the second direction.

6. The bobbin for an inductor of claim 1, wherein, A first protruding portion is protruded on a side of the side plate portion away from the winding groove, the first protruding portion is configured to be positioned in a first groove on an inner wall of a base plate portion of the magnetic core.

7. The bobbin of claim 1 or 6, wherein The side plate portion extends a connecting portion in the first direction, the wire outlet portion is connected with the side plate portion through the connecting portion, two sides of the wire outlet portion in the second direction outwardly exceed 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, a surface of the wire outlet portion on the side toward the connecting portion protrudes a second protruding portion; the second protruding portion is configured to be assembled and positioned in a first notch of the magnetic core.

8. An inductor characterized by The inductor comprises two magnetic cores and the bobbin as claimed in any one of claims 1 to 5, the magnetic core comprises a base plate portion, a middle portion and a peripheral portion of the base plate portion respectively extend a middle column and a limiting side portion to the same side, a bobbin mounting space is formed between the middle column and the limiting side portion, the limiting side portion has a first notch on one side thereof, the winding groove of the bobbin is wound with a winding, the two magnetic cores are respectively assembled on opposite sides of the bobbin, wherein the middle columns of the two magnetic cores extend into the assembly hole and form an air gap therebetween, the bobbin body is adaptively arranged in the bobbin mounting space of the two magnetic cores, the first notches of the two magnetic cores are oppositely arranged, and the wire outlet portion is located outside the first notches.

9. The inductor of claim 8, wherein, The middle column is adaptively inserted into the assembly hole.

10. The inductor of claim 8, wherein, The magnetic core is in a square shape as a whole, comprising two opposite first sides in the first direction and two opposite second sides in the second direction, a distance between the two first sides is greater than a distance between the two second sides, and the first notch is arranged corresponding to the first side.

11. The inductor of claim 10, wherein, The first side and the second side are connected by a chamfer.

12. The inductor of claim 8, wherein, The side plate part extends along the first direction to a connecting part corresponding to the first notch, the wire outlet part is connected to the side plate part through the connecting part, two sides of the wire outlet part in the second direction extend outward beyond two side edges of the connecting part, at least part of the wire outlet part is located on a side of the side plate part away from the wire groove, and a second protruding part corresponding to the first notch is protruded from a surface of the wire outlet part toward a side where the connecting part is located; the first notch penetrates through the base plate part; and the second protruding part is fitted to and positioned at an end of the first notch away from the base plate part.

13. The inductor of claim 8, wherein, A first protruding part is protruded on a side of the side plate part away from the wire groove; a first recess is provided on the base plate part corresponding to the first notch; and the first protruding part is positioned in the first recess to limit lateral movement of the first protruding part.

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