Framework structure of magnetic element and magnetic element

Abstract

The utility model relates to the technical field of electronic devices, in particular to a skeleton structure of a magnetic element and the magnetic element. The skeleton structure of the magnetic element comprises a skeleton body and a flat cable fixing piece, the skeleton body is used for winding a wire to form a winding, the flat cable fixing piece comprises a positioning plate, a first bending part and a second bending part, the positioning plate is connected with the skeleton body, and the axis of the skeleton body penetrates through the plane where at least part of the positioning plate is located; the first bending part and the second bending part are both connected with the positioning plate, and the first bending part, the second bending part and the positioning plate are enclosed to form a wire arrangement space used for filling the outgoing line so as to restrain and fix the outgoing line; the wire arrangement space is provided with an opening end through which a leading-out wire of the winding passes, the end surface of the opening end is provided with a long side and a short side which are adjacent to each other, and the length of the long side is greater than that of the short side, so that a flat pin structure is formed, the space is saved, and the opening area of a jack on the circuit board is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic devices, and in particular to a skeleton structure of a magnetic element and a magnetic element. Background Art

[0002] Magnetic components are usually composed of windings and magnetic cores. They are essential power electronic devices for energy storage, energy conversion and electrical isolation. Windings can be formed by winding wires around a frame. There are many types of wires, such as single-core wires, multi-strand wires, flat wires, etc.

[0003] See also Figure 1 As shown, in order to save space, a long slot is usually formed on the frame 10', and the lead wire 31' of the winding 30' is directly inserted into the long slot to form a row. However, since the restraining force of the long slot on the lead wire is not easy to control, the wire is easy to fall off from the opening of the long slot, and when twisting the wire, the tightness is not easy to control, which can easily lead to inconsistent wire diameters. The positions of multiple wires in the long slot are inconsistent, and their centers are not on the same straight line, resulting in poor consistency in pin size and shape, which is not conducive to plugging and fixing with the circuit board. Utility Model Content

[0004] The purpose of the present disclosure is to provide a skeleton structure of a magnetic element and a magnetic element, so as to enhance the pin fixing effect and the consistency of size and shape on the basis of saving space.

[0005] Based on the above-mentioned purpose, the present disclosure provides a skeleton structure of a magnetic element, including a skeleton body and a wire arrangement fixing part, the skeleton body is used to wind wires to form windings, and the wire arrangement fixing part includes a positioning plate, a first bending portion and a second bending portion, the positioning plate is connected to the skeleton body, and the axis of the skeleton body passes through a plane where at least part of the positioning plate is located; the first bending portion and the second bending portion are both connected to the positioning plate, and the first bending portion, the second bending portion and the positioning plate are enclosed to form a wire arrangement space for filling the lead wires of the winding, so as to constrain and fix the lead wires of the winding; wherein the wire arrangement space has an open end for the lead wires of the winding to pass through, and the end face of the open end has adjacent long sides and short sides, and the length of the long side is greater than the length of the short side.

[0006] In one embodiment of the present disclosure, the wiring fixture has a first state and a second state. In the first state, an opening is formed between the free ends of the first bent portion and the second bent portion to allow the lead wires of the winding to enter the wiring space; in the second state, the opening is closed to constrain and fix the lead wires of the winding.

[0007] At least one of the first bending portion and the second bending portion can be bent so that the cable fixing element switches from the first state to the second state.

[0008] In one embodiment of the present disclosure, the first bending portion includes a first plate portion and a second plate portion, the first plate portion is connected to one side of the positioning plate, and the second plate portion is connected to the first plate portion; the second bending portion includes a third plate portion and a fourth plate portion, the third plate portion is connected to the other side of the positioning plate, and the fourth plate portion is connected to the third plate portion;

[0009] In the first state, an opening is formed between the free end of the second plate portion and the free end of the fourth plate portion;

[0010] At least a portion of the second plate portion can be bent so that the cable fixing member switches from the first state to the second state; and / or at least a portion of the fourth plate portion can be bent so that the cable fixing member switches from the first state to the second state.

[0011] In one embodiment of the present disclosure, the second plate portion includes a first transverse portion and a first vertical portion, the fourth plate portion includes a second transverse portion and a second vertical portion, the first transverse portion and the second transverse portion are both parallel to the positioning plate, the first vertical portion and the second vertical portion both extend in a direction away from the positioning plate, and the first vertical portion and the second vertical portion can be bent in a direction close to the positioning plate to switch the cable fixing from the first state to the second state.

[0012] In one embodiment of the present disclosure, the free end of the second plate portion is provided with a first concave-convex structure, and the free end of the fourth plate portion is provided with a second concave-convex structure. In the second state, the first concave-convex structure cooperates with the first concave-convex structure to make the opening in a closed state.

[0013] In one embodiment of the present disclosure, at least a portion of the positioning plate is perpendicular to the axis of the skeleton body.

[0014] In one embodiment of the present disclosure, the positioning plate is a straight plate, and the plane where the straight plate is located is perpendicular to the axis of the skeleton body;

[0015] Alternatively, the positioning plate is a bent plate, which includes a first plate-like structure and a second plate-like structure, wherein the first plate-like structure is perpendicular to the second plate-like structure, the first plate-like structure is connected to the skeleton body, and the first plate-like structure is perpendicular to the axis of the skeleton body; the first bending portion and the second bending portion are both connected to the second plate-like structure.

[0016] In one embodiment of the present disclosure, the positioning plate is connected to the skeleton body by pre-embedding;

[0017] Alternatively, the positioning plate and the skeleton body are connected by cold pressing.

[0018] In one embodiment of the present disclosure, the cable fixing piece is made of metal, and the cable fixing piece can be welded to the lead wire of the winding to form a pin.

[0019] In one embodiment of the present disclosure, the skeleton body includes a winding frame and a boss, the winding frame is used to wind wire to form a winding; the boss is connected to the winding frame, the boss is provided with a slot, and one end of the positioning plate is installed in the slot.

[0020] In one embodiment of the present disclosure, the boss is provided with a recessed portion for accommodating the cable fixing piece, and the recessed portion is provided with a limited position surface, one end of the first bending portion and the second bending portion can abut against the limiting surface, and the other end of the first bending portion and the second bending portion is located outside the recessed portion.

[0021] In one embodiment of the present disclosure, the outline shape of the opening end of the wiring space is oblong, rectangular or elliptical.

[0022] In one embodiment of the present disclosure, the positioning plate, the first bending portion and the second bending portion are integrally formed.

[0023] In one embodiment of the present disclosure, a length ratio of the long side to the short side is not less than 2:1.

[0024] Based on the above purpose, the present disclosure further provides a magnetic element, including a winding and a skeleton structure of the magnetic element, wherein the winding is wound around the skeleton body, and the lead wires of the winding are filled in the wiring space.

[0025] In one embodiment of the present disclosure, the cable fixing member is welded or crimped to the lead wire of the winding to form a pin.

[0026] In one embodiment of the present disclosure, the winding includes one or more of a single core wire, a multi-strand wire, a multi-strand braided wire, and a flat wire.

[0027] The beneficial effects of the present disclosure are mainly:

[0028] The skeleton structure provided by the present invention, when in use, winds the wires on the skeleton body to form windings, and there is no need to manually twist the wires. The lead wires of the windings can be directly filled into the wiring space, thereby realizing the constraint and fixation of the lead wires of the windings. The lead wires can be welded or crimped with the first bending portion, the second bending portion and the positioning plate to form pins with good consistency in size and shape, which is convenient for plugging the pins with the circuit board during subsequent use. Since the length of the long side of the end face of the open end of the wiring space is greater than the length of the short side, a flat pin structure can be formed, which not only saves space but also reduces the opening area of ​​the jack on the circuit board, thereby improving the overall performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a schematic diagram of the structure of the matching of the skeleton and the winding in the prior art;

[0031] Figure 2 A schematic structural diagram of the skeleton structure of a magnetic element provided in an embodiment of the present disclosure;

[0032] Figure 3 A front view of the skeleton structure of the magnetic element provided in the embodiment of the present disclosure;

[0033] Figure 4 for Figure 3 A cross-sectional view along line AA;

[0034] Figure 5 for Figure 2 A schematic structural diagram of a skeleton body in a skeleton structure of a magnetic element is shown;

[0035] Figure 6 for Figure 2 A front view of a skeleton body in the skeleton structure of a magnetic element is shown;

[0036] Figure 7 for Figure 6 A cross-sectional view along line BB;

[0037] Figure 8 for Figure 2 The schematic diagram of the structure of the skeleton structure matching the winding is shown;

[0038] Fig. 9is a schematic structural diagram of a cable fixing member in an embodiment of the present disclosure (in a first state);

[0039] Fig.10 for Fig. 9 A schematic diagram of the cable fixing member in a second state is shown;

[0040] Fig.11 Another structural schematic diagram of the cable fixing member provided in the embodiment of the present disclosure (in the first state);

[0041] Fig.12 for Fig.11 A schematic diagram of the cable fixing member in a second state is shown;

[0042] Fig.13 A third structural schematic diagram of the cable fixing member provided in an embodiment of the present disclosure (in a first state);

[0043] Fig.14 for Fig.13 A schematic diagram of the cable fixing member in a second state is shown;

[0044] Fig.15 is a schematic diagram of pins in an embodiment of the present disclosure;

[0045] Fig.16 is another schematic diagram of pins in an embodiment of the present disclosure;

[0046] Fig.17 A schematic diagram of the structure of a magnetic element provided in an embodiment of the present disclosure;

[0047] Fig.18 Another structural schematic diagram of the skeleton structure of the magnetic element provided in the embodiment of the present disclosure;

[0048] Fig.19 for Fig.18 A schematic structural diagram of a skeleton body in a skeleton structure of a magnetic element is shown;

[0049] Fig. 20 for Fig.18 A schematic diagram of the structure of the cable fixing member in the skeleton structure of the magnetic element is shown;

[0050] Fig.21 Another structural schematic diagram of a magnetic element provided in an embodiment of the present disclosure (windings not shown).

[0051] The following are the descriptions of the reference numerals:

[0052] 10'-skeleton;

[0053] 10a- skeleton body;

[0054] 11- winding frame;

[0055] 12- boss;

[0056] 121-depression;

[0057] 1211a, 1211b-limiting surfaces;

[0058] 122-slot;

[0059] 20-cable fixing parts;

[0060] 20a-open;

[0061] 20b- wiring space;

[0062] 201b-open end;

[0063] 21- positioning plate;

[0064] 211-first plate-like structure;

[0065] 212 - second plate-like structure;

[0066] 22- first bending portion;

[0067] 221- first plate portion;

[0068] 222- second plate portion;

[0069] 222a-first concave-convex structure;

[0070] 2221-first transverse portion;

[0071] 2222-first vertical portion;

[0072] 23- second bending portion;

[0073] 231-third plate;

[0074] 232-fourth plate;

[0075] 232a- second concave-convex structure;

[0076] 2321 - second transverse portion;

[0077] 2322-second vertical portion;

[0078] 30, 30'-winding;

[0079] 31, 31'-lead wire;

[0080] 31a-pin;

[0081] 41- a first magnetic core;

[0082] 42- Second magnetic core. DETAILED DESCRIPTION

[0083] The technical solution of the present disclosure will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0084] In the description of the present disclosure, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0085] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0086] See also Figures 2 to 21 As shown, this embodiment provides a skeleton structure of a magnetic element, including a skeleton body 10a and a wiring fixture 20, the skeleton body 10a is used to wind wires to form windings, the wiring fixture 20 includes a positioning plate 21, a first bending portion 22 and a second bending portion 23, the positioning plate 21 is connected to the skeleton body 10a, and the axis of the skeleton body 10a passes through a plane where at least part of the positioning plate 21 is located; the first bending portion 22 and the second bending portion 23 are both connected to the positioning plate 21, and the first bending portion 22, the second bending portion 23 and the positioning plate 21 enclose a wiring space 20b for filling the lead wire 31 of the winding 30, so as to constrain and fix the lead wire 31 of the winding 30; wherein the wiring space 20b has an open end 201b for the lead wire 31 of the winding 30 to pass through, and the end face of the open end 201b has adjacent long sides and short sides, and the length of the long side is greater than the length of the short side.

[0087] The skeleton structure provided in this embodiment, when in use, winds the wires around the skeleton body to form windings, and there is no need to manually twist the wires. The lead wires of the windings are directly filled into the wiring space 20b, thereby realizing the constraint and fixation of the lead wires of the windings. The lead wires can be welded or crimped to the first bending portion 22, the second bending portion 23 and the positioning plate 21. Since the length of the long side of the end face of the open end 201b of the wiring space 20b is greater than the length of the short side, a flat pin 31a with good consistency in size and shape can be formed, which facilitates the pin 31a to be plugged into the circuit board during subsequent use, which not only saves space but also reduces the opening area of ​​the jack on the circuit board, thereby improving the overall performance of the product.

[0088] In one embodiment, see Figure 3 As shown, the long sides are perpendicular to the axis of the skeleton body 10a.

[0089] For example, see Figure 3 As shown, the length of the long side of the opening end 201b is d 1 The short side is parallel to the axis of the frame body 10a, and the length of the short side is d 2 , d 1 >d 2 .

[0090] It should be noted that, depending on the type of wire, the short side can be a straight side, which is perpendicular to the long side, or the short side can be an arc-shaped side. When the short side is an arc-shaped side, the length of the short side refers to the distance between the two endpoints of the arc-shaped side.

[0091] In this embodiment, the length ratio of the long side to the short side is not less than 2:1, so as to form a flat wiring space.

[0092] See also Figure 8 As shown, the lead wires of the winding are filled in the wiring space 20b. After the lead wires are constrained and fixed, two flat pins are formed, which saves space and correspondingly reduces the opening area of ​​the jack on the circuit board.

[0093] See also Figure 4 As shown, the wiring space 20b has two opening ends 201b arranged opposite to each other. Exemplarily, the shapes and sizes of the two opening ends 201b are substantially the same.

[0094] In one embodiment, the positioning plate 21, the first bending portion 22 and the second bending portion 23 are integrally formed, which is convenient for production and processing, and can also improve the overall structural strength of the cable fixing member 20 and reduce the risk of breakage.

[0095] In one embodiment, the wiring fixture 20 has a first state and a second state. In the first state, an opening 20a is formed between the free ends of the first bending portion 22 and the second bending portion 23 to allow the lead wires of the winding to enter the wiring space 20b; in the second state, the opening 20a is closed to constrain and fix the lead wires of the winding; at least one of the first bending portion 22 and the second bending portion 23 can be bent to switch the wiring fixture 20 from the first state to the second state.

[0096] Illustratively, in the first state, the free ends of the first bent portion 22 and the second bent portion 23 are staggered to form an opening 20a, and the opening 20a is connected to the two open ends 201b, so that the lead wires of the winding can directly enter the wiring space 20b from the opening 20a, without the need to pass the lead wires from one open end 201b into the wiring space 20b and then pass them out from the other open end 201b, thereby reducing the degree of bending of the lead wires, reducing the difficulty of assembly, and improving assembly efficiency.

[0097] In one embodiment, the material of the wiring fixture 20 is metal, and the wiring fixture 20 can be welded with the lead wire of the winding to form a lead. Exemplarily, the inner wall of the wiring space 20b is welded with the lead wire of the winding.

[0098] In one embodiment, see Fig. 9 As shown, the first bending portion 22 includes a first plate portion 221 and a second plate portion 222, the first plate portion 221 is connected to one side of the positioning plate 21, and the second plate portion 222 is connected to the first plate portion 221; the second bending portion 23 includes a third plate portion 231 and a fourth plate portion 232, the third plate portion 231 is connected to the other side of the positioning plate 21, and the fourth plate portion 232 is connected to the third plate portion 231; in the first state, an opening 20a is formed between the free end of the second plate portion 222 and the free end of the fourth plate portion 232.

[0099] Exemplarily, the positioning plate 21, the first plate portion 221 and the second plate portion 222 are integrally formed, and the first plate portion 221 is located between the second plate portion 222 and the positioning plate 21. The positioning plate 21, the third plate portion 231 and the fourth plate portion 232 are integrally formed, and the third plate portion 231 is located between the fourth plate portion 232 and the positioning plate 21. In the first state, the free end of the second plate portion 222 and the free end of the fourth plate portion 232 are offset to form an opening 20a, so that the lead wire of the winding directly enters the wiring space 20b from the opening 20a.

[0100] See also Fig. 9 As shown, the first plate portion 221 and the third plate portion 231 may be arc-shaped plates, see Fig.16 As shown, the first plate portion 221 and the third plate portion 231 may also be straight plates.

[0101] In some embodiments, at least a portion of the second plate portion 222 can be bent to switch the cable fixing member 20 from the first state to the second state. Fig.10 As shown, the length of the second plate portion 222 is greater than the length of the fourth plate portion 232, and the second plate portion 222 can be bent at a certain angle relative to the first plate portion 221, so that the free end of the second plate portion 222 moves toward the free end of the fourth plate portion 232 until the opening 20a is closed. At this time, the cable fixing member 20 switches from the first state to the second state.

[0102] It should be noted that, in the process of bending the second plate portion 222 relative to the first plate portion 221, it can be bent until the free end of the second plate portion 222 is aligned with the free end of the fourth plate portion 232. At this time, the surfaces of the second plate portion 222 and the fourth plate portion 232 close to the positioning plate 21 can contact the lead-out wire, and the surfaces of the second plate portion 222 and the fourth plate portion 232 away from the positioning plate 21 are coplanar; when the free end of the second plate portion 222 is aligned with the free end of the fourth plate portion 232, if there is a gap between the surfaces of the second plate portion 222 and the fourth plate portion 232 close to the positioning plate 21 and the lead-out wire, the second plate portion 222 can continue to be bent until the surface of the second plate portion 222 close to the positioning plate 21 contacts the lead-out wire, so as to facilitate welding of the lead-out wire and the inner wall of the wiring space 20b. This can reduce the types of molding dies for the cable fixing member 20. Within a certain range, if the thickness of the lead wire in a direction parallel to the short side is smaller than the length of the short side, the cable fixing member 20 of the same specification can be used for fixing.

[0103] Of course, when the free end of the second plate portion 222 is aligned with the free end of the fourth plate portion 232, if there is a gap between the surface of the second plate portion 222 and the fourth plate portion 232 close to the positioning plate 21 and the lead wire, more solder can be filled into the gap to facilitate welding. At this time, it can be ensured that the surface of the second plate portion 222 and the fourth plate portion 232 away from the positioning plate 21 are coplanar, and the resulting pin shape is more neat.

[0104] In some other embodiments, at least a portion of the second plate portion 222 and at least a portion of the fourth plate portion 232 can be bent, so that the cable fixing member 20 is switched from the first state to the second state.

[0105] For example, see Fig.11 and Fig.12As shown, the second plate portion 222 includes a first transverse portion 2221 and a first vertical portion 2222, and the fourth plate portion 232 includes a second transverse portion 2321 and a second vertical portion 2322. The first transverse portion 2221 and the second transverse portion 2321 are both parallel to the positioning plate 21, and the first vertical portion 2222 and the second vertical portion 2322 extend in a direction away from the positioning plate 21. A gap is provided between the first vertical portion 2222 and the second vertical portion 2322 to form an opening 20a. Exemplarily, the center line of the opening 20a is located between the first plate portion 221 and the third plate portion 231. The first vertical portion 2222 and the second vertical portion 2322 can be bent in a direction close to the positioning plate 21 until the opening 20a is closed. At this time, the cable fixing member 20 switches from the first state to the second state.

[0106] In other embodiments, at least a portion of the fourth plate portion 232 can be bent to switch the cable fixing member 20 from the first state to the second state. Exemplarily, the length of the fourth plate portion 232 is greater than the length of the second plate portion 222, and the fourth plate portion 232 can be bent at a certain angle relative to the third plate portion 231, so that the free end of the fourth plate portion 232 moves toward the free end of the second plate portion 222 until the opening 20a is closed, at which time the cable fixing member 20 switches from the first state to the second state.

[0107] Of course, the length of the fourth plate portion 232 may also be equal to the length of the second plate portion 222 .

[0108] In one embodiment, see Fig.13 and Fig.14 As shown, the free end of the second plate portion 222 is provided with a first concave-convex structure 222a, and the free end of the fourth plate portion 232 is provided with a second concave-convex structure 232a. In the second state, the first concave-convex structure 222a cooperates with the first concave-convex structure 222a to make the opening 20a in a closed state, so that the second plate portion 222 and the fourth plate portion 232 can be limited in a direction perpendicular to the end face of the opening end 201b to ensure that the end face of the opening end 201b is flush.

[0109] In this embodiment, the first concave-convex matching structure includes protrusions and grooves alternately arranged along a set direction, and the second concave-convex matching structure includes grooves and protrusions alternately arranged along a set direction, wherein the set direction is a direction perpendicular to the opening end 201b and away from the skeleton body.

[0110] For example, see Fig.10 , Fig.12 and Fig.14 As shown, the outline shape of the opening end of the wiring space 20b can be an oblong, see Fig.16As shown, the outline shape of the opening end of the wiring space can also be a rectangle. Of course, the outline shape of the opening end of the wiring space can also be an ellipse.

[0111] It should be noted that the contour shape of the opening end 201b of the wiring space 20b is not limited to the above three types, as long as it can constrain and fix the lead wires and form flat pins with good consistency in size and shape.

[0112] It should also be noted that the structural forms of the cable fixing member 20 are not limited to the above types, and other structural forms can also be selected according to actual production and processing needs.

[0113] In one possible design, the skeleton structure of the magnetic component can be applied to a transformer or an inductor. Figure 2 As shown, the skeleton body 10a includes a winding frame 11 and a boss 12. The winding frame 11 is used to wind the wire to form a winding 30; the boss 12 is fixedly connected to the winding frame 11, see Figure 7 As shown, the boss 12 is provided with a slot 122 , and one end of the positioning plate 21 is fixedly installed in the slot 122 .

[0114] Exemplarily, the winding frame 11 has a hollow columnar structure. After the wire is wound on the winding frame 11 to form the winding 30, the lead wire 31 of the winding 30 enters the wiring space 20b from the opening 20a, and then the opening 20a is closed, thereby forming a flat pin 31a with good consistency in size and shape.

[0115] In this embodiment, the boss 12 is integrally formed with the winding frame 11. For example, the boss 12 and the winding frame 11 are formed by injection molding, and the slot 122 is formed immediately after the injection molding is demoulded. The depth direction of the slot 122 is perpendicular to the axis of the skeleton body.

[0116] For example, the positioning plate 21 and the skeleton body 10a can be connected by cold pressing. Specifically, the skeleton body is heated to about 100°C to expand the slot 122, one end of the positioning plate 21 is installed in the slot 122, and then the slot 122 is cooled to shrink, thereby fixing one end of the positioning plate 21 in the slot 122.

[0117] Of course, the positioning plate 21 and the skeleton body 10a can also be connected by pre-embedded mode. Exemplarily, before the boss 12 and the winding frame 11 are injection molded, the positioning plate 21 is placed at the corresponding position, and after injection molding, the positioning plate 21 and the boss 12 are closely matched and firmly fixed.

[0118] In this possible design, see Fig. 9 , Fig.11 and Fig.13As shown, the positioning plate 21 can be a straight plate, and the plane where the straight plate is located is perpendicular to the axis of the skeleton body 10a. At this time, the skeleton structure of the magnetic element is a horizontal structure, the extension direction of the pin 31a is perpendicular to the axis of the skeleton body, and the end surface of the open end 201b of the wiring space 20b is parallel to the axis of the skeleton body 10a.

[0119] See also Figure 2 and Fig. 9 As shown, the first plate portion 221 and the third plate portion 231 are disposed at one end of the positioning plate 21 away from the slot 122 . When the positioning plate 21 is inserted into the slot 122 , the first plate portion 221 and the third plate portion 231 are both located outside the slot 122 .

[0120] In this possible design, see Figure 5 As shown, the boss 12 is provided with a recessed portion 121 for accommodating the cable fixing piece 20 , and the recessed portion 121 is provided with a limited position surface, one end of the first bending portion 22 and the second bending portion 23 can abut against the limited position surface, and the other end of the first bending portion 22 and the second bending portion 23 is located outside the recessed portion 121 .

[0121] Exemplarily, the recessed portion 121 is disposed on the upper surface of the boss 12, and the recessed portion 121 penetrates the side wall of the boss 12. The recessed portion 121 has a receiving space, and a portion of the cable fixing member 20 is received in the receiving space.

[0122] The limiting surface 1211a is arranged on the inner surface of the recessed portion 121. Exemplarily, there are two limiting surfaces 1211a, and the limiting surfaces 1211a are arc-shaped surfaces. When the positioning plate 21 is inserted into the slot 122, one end of the first plate portion 221 and one end of the third plate portion 231 can respectively abut against the two limiting surfaces 1211a to limit the movement of the cable fixing 20 relative to the boss 12, thereby ensuring that the other end of the cable fixing 20 is located outside the accommodating space to facilitate insertion with the circuit board.

[0123] In this possible design, the positioning plate 21 may also be a bent plate. In this case, the skeleton structure of the magnetic element is a vertical structure. Fig. 20 As shown, the bent plate includes a first plate-like structure 211 and a second plate-like structure 212. The first plate-like structure 211 is perpendicular to the second plate-like structure 212. The first plate-like structure 211 is fixedly connected to the skeleton body 10a. The first plate-like structure 211 is perpendicular to the axis of the skeleton body 10a. The first bending portion 22 and the second bending portion 23 are both fixedly connected to the second plate-like structure 212.

[0124] It should be understood that Fig. 9 , Fig.11 and Fig.13 The structures of the first bending portion 22 and the second bending portion 23 are also applicable to the case where the positioning plate 21 is a bent plate.

[0125] See also Fig.18 As shown, the extension direction of the pin is parallel to the axis of the frame body 10a, and the end surface of the opening end 201b of the wiring space 20b is perpendicular to the axis of the frame body 10a. Fig.19 As shown, the depth direction of the slot 122 is perpendicular to the axis of the skeleton body 10a.

[0126] Exemplarily, the recessed portion 121 is disposed on the side wall of the boss 12, and the recessed portion 121 penetrates two surfaces of the boss 12 that are disposed oppositely along the axis of the frame body. The limiting surface 1211b is the inner surface of the recessed portion 121 parallel to the side wall of the boss 12, the first plate-like structure 211 is plugged into the slot 122, and the second plate-like structure 212 abuts against the limiting surface 1211b. At the same time, the open end 201b of the wiring space 20b away from the first plate-like structure 211 is located outside the recessed portion 121, that is, below the boss 12, so as to facilitate plugging with the circuit board.

[0127] In another possible design, the cable fixing piece may also be applied to the base structure of the magnetic element.

[0128] Exemplarily, the cable fixing member and the base structure of the magnetic element may also be connected by pre-embedding or cold pressing.

[0129] This embodiment further provides a magnetic element, including a winding 30 and a skeleton structure of the magnetic element provided in this embodiment, the winding 30 is wound around the skeleton body, and the lead wire 31 of the winding 30 is filled in the wiring space 20b.

[0130] The magnetic element provided in this embodiment uses the skeleton structure of the magnetic element provided in this embodiment, so the lead wires of the winding can be directly filled in the wiring space 20b, thereby realizing the constraint and fixation of the lead wires of the winding, and the lead wires can be welded or crimped with the first bending portion 22, the second bending portion 23 and the positioning plate 21. Since the length of the long side of the end face of the open end 201b of the wiring space 20b is greater than the length of the short side, a flat pin with good consistency in size and shape can be formed, which is convenient for the pin to be plugged into the circuit board during subsequent use, which not only saves space but also reduces the opening area of ​​the jack on the circuit board, thereby improving the overall performance of the product.

[0131] In this embodiment, the length ratio of the long side to the short side is not less than 2:1, so as to form a flat wiring space.

[0132] For example, see Fig.17 As shown, this embodiment provides a horizontal magnetic element, which may be a transformer or an inductor.

[0133] For example, see Fig.21 As shown, this embodiment provides a vertical magnetic element, which may be a transformer or an inductor.

[0134] See also Fig.17 and Fig.21 As shown, the magnetic element further includes a first magnetic core 41 and a second magnetic core 42 , and the first magnetic core 41 and the second magnetic core 42 are disposed oppositely at two ends of the axial direction of the skeleton body 10 a .

[0135] In one embodiment, the winding includes one or more of a single core wire, a stranded wire, a braided wire, and a flat wire.

[0136] For example, see Fig.15 As shown, when a single-core wire is used as the wire material, multiple single-core wires can be arranged in the wiring space 20b and welded to form pins 31a. After arrangement or welding, the redundant single-core wires outside the wiring space 20b are cut off. After cutting off, the end surface of the free end of the single-core wire usually exceeds the end surface of the open end 201b of the wiring space 20b, but it will not affect the plug-in fixation of the pin and the circuit board. Of course, the end surface of the free end of the single-core wire should be as flush as possible with the end surface of the open end 201b of the wiring space 20b.

[0137] For example, see Fig.16 As shown, when flat wires are used as wire materials, the cable fixing member 20 mainly fixes the flat wires, so that multiple flat wires are closely arranged, which is convenient for direct plugging with the circuit board. At this time, the flat wires and the inner wall of the cable space 20b may not be welded. Exemplarily, the cable fixing member is crimped with the lead wire of the winding to achieve compression and fixation of the lead wire of the winding.

[0138] For example, see Fig.17 As shown, when a multi-strand wire is used as the wire material, a plurality of multi-strand wires can be inserted into the wiring space 20b, filled, compacted and welded to form the pin 31a.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A skeleton structure of a magnetic element, characterized in that: It includes a skeleton body and a wire arrangement fixing part, the skeleton body is used for winding wires to form windings, the wire arrangement fixing part includes a positioning plate, a first bending portion and a second bending portion, the positioning plate is connected to the skeleton body, and the axis of the skeleton body passes through a plane where at least part of the positioning plate is located; the first bending portion and the second bending portion are both connected to the positioning plate, and the first bending portion, the second bending portion and the positioning plate enclose a wire arrangement space for filling the lead wires of the windings, so as to constrain and fix the lead wires of the windings; wherein the wire arrangement space has an open end for the lead wires of the windings to pass through, and the end face of the open end has adjacent long sides and short sides, and the length of the long sides is greater than the length of the short sides.

2. The skeleton structure of the magnetic element according to claim 1, characterized in that: The wiring fixture has a first state and a second state. In the first state, an opening is formed between the free ends of the first bent portion and the second bent portion to allow the lead wires of the winding to enter the wiring space. In the second state, the opening is closed to constrain and fix the lead wires of the winding. At least one of the first bending portion and the second bending portion can be bent so that the cable fixing element switches from the first state to the second state.

3. The skeleton structure of the magnetic element according to claim 2, characterized in that: The first bending portion includes a first plate portion and a second plate portion, the first plate portion is connected to one side of the positioning plate, and the second plate portion is connected to the first plate portion; the second bending portion includes a third plate portion and a fourth plate portion, the third plate portion is connected to the other side of the positioning plate, and the fourth plate portion is connected to the third plate portion; In the first state, an opening is formed between the free end of the second plate portion and the free end of the fourth plate portion; At least a portion of the second plate portion is bendable so that the cable fixing member switches from the first state to the second state; And / or, at least a portion of the fourth plate portion can be bent so that the cable fixing element can be switched from the first state to the second state.

4. The skeleton structure of the magnetic element according to claim 3, characterized in that: The second plate portion includes a first transverse portion and a first vertical portion, the fourth plate portion includes a second transverse portion and a second vertical portion, the first transverse portion and the second transverse portion are both parallel to the positioning plate, the first vertical portion and the second vertical portion both extend in a direction away from the positioning plate, and the first vertical portion and the second vertical portion can be bent in a direction close to the positioning plate to switch the cable fixing from the first state to the second state.

5. The skeleton structure of the magnetic element according to claim 3, characterized in that: The free end of the second plate portion is provided with a first concave-convex structure, and the free end of the fourth plate portion is provided with a second concave-convex structure. In the second state, the first concave-convex structure cooperates with the first concave-convex structure to make the opening in a closed state.

6. The skeleton structure of the magnetic element according to claim 1, characterized in that: At least a portion of the positioning plate is perpendicular to the axis of the skeleton body.

7. The skeleton structure of the magnetic element according to claim 6, characterized in that: The positioning plate is a straight plate, and the plane where the straight plate is located is perpendicular to the axis of the skeleton body; Alternatively, the positioning plate is a bent plate, which includes a first plate-like structure and a second plate-like structure, wherein the first plate-like structure is perpendicular to the second plate-like structure, the first plate-like structure is connected to the skeleton body, and the first plate-like structure is perpendicular to the axis of the skeleton body; the first bending portion and the second bending portion are both connected to the second plate-like structure.

8. The skeleton structure of a magnetic element according to any one of claims 1 to 7, characterized in that: The positioning plate is connected to the skeleton body by pre-embedding; Alternatively, the positioning plate and the skeleton body are connected by cold pressing.

9. The skeleton structure of a magnetic element according to any one of claims 1 to 7, characterized in that: The material of the wiring fixture is metal, and the wiring fixture can be welded to the lead-out wire of the winding to form a pin.

10. The skeleton structure of a magnetic element according to any one of claims 1 to 7, characterized in that: The skeleton body comprises a winding frame and a boss, wherein the winding frame is used for winding wires to form a winding; the boss is connected to the winding frame, and the boss is provided with a slot, and one end of the positioning plate is installed in the slot.

11. The skeleton structure of the magnetic element according to claim 10, characterized in that: The boss is provided with a recessed portion for accommodating the cable fixing piece, and the recessed portion is provided with a limited surface, one end of the first bending portion and the second bending portion can abut against the limited surface, and the other end of the first bending portion and the second bending portion is located outside the recessed portion.

12. The skeleton structure of a magnetic element according to any one of claims 1 to 7, characterized in that: The outline shape of the opening end of the wiring space is oblong, rectangular or elliptical.

13. The skeleton structure of a magnetic element according to any one of claims 1 to 7, characterized in that: The positioning plate, the first bending portion and the second bending portion are integrally formed.

14. The skeleton structure of a magnetic element according to any one of claims 1 to 7, characterized in that: The length ratio of the long side to the short side is not less than 2:

1.

15. A magnetic element, characterized in that: A skeleton structure comprising a winding and a magnetic element according to any one of claims 1 to 14, wherein the winding is wound around the skeleton body, and the lead wires of the winding are filled in the wiring space.

16. The magnetic element according to claim 15, characterized in that The wiring fixture is welded or crimped to the lead wires of the winding to form pins.

17. The magnetic element according to claim 15 or 16, characterized in that: The winding includes one or more of a single core wire, a multi-strand wire, and a flat wire.

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