A winding and a magnetic element

Abstract

The present application proposes a winding and a magnetic element. The winding includes: a conductor coil, which is formed by winding a strip conductor around a containing area in a circle, the conductor includes a body and a first insulating layer coated on the outer surface of the body, and the two ends of the conductor along the winding direction are respectively provided with a first blank area and a second blank area not covered by the first insulating layer, the first blank area and the second blank area are respectively located on the two surfaces opposite to the conductor, and are respectively located in the inner circle and the outer circle of the conductor coil, and the body is exposed in the first blank area and the second blank area; a first lead-out terminal covers the first blank area and is electrically connected to the body in the first blank area; a second lead-out terminal covers the second blank area and is electrically connected to the body in the second blank area. The winding structure of the present application is compact, the space utilization rate is high, and the conductive area is large, which can meet the application requirements of small space and large current, and the insulation between the coils is good.

Description

Technical Field

[0001] The present application relates to the technical field of windings, and in particular to a winding and a magnetic element. Background Art

[0002] With the rapid development of science and technology, especially the emergence of multifunctional equipment, the demand for the entire passive device is increasing. As one of the passive components, magnetic components are also widely used. The requirements for large current, high frequency, high reliability, etc. are constantly upgraded. In order to meet this, the application of magnetic components is becoming more and more extensive. Magnetic components are assembled by magnets, windings, and bases. The winding is made of conductors. The current flows through the windings to generate a magnetic field. It is the core part of the magnetic component. The existing winding is made of enameled wire as a conductor and spirally wound, which leads to at least the following disadvantages: 1) Low structural strength. When the magnet of the magnetic component is prepared by molding, the spirally wound conductor is easy to move, resulting in the enameled wire exposing the conductive wire inside, such as copper wire, which affects the product yield; 2) The cross-section of the enameled wire is circular or elliptical, resulting in more gaps between each circle of enameled wire, and the space utilization rate is relatively low; 3) When the wire end of the existing winding is laser welded with the terminal of the base, the paint film at the corresponding part of the enameled wire will burn, that is, the paint film will burn back, which is easy to cause poor insulation between the wires near the wire end. Utility Model Content

[0003] In view of this, the present application provides a winding and a magnetic element, which can improve the problems of low space utilization, low structural strength, easy paint film burnback and the resulting poor insulation between wires in the existing winding.

[0004] The present application provides a winding, comprising:

[0005] A conductor coil, formed by winding a strip conductor around a containing area in a circle, the conductor comprising a body and a first insulating layer coated on the outer surface of the body, a first blank area and a second blank area not covered by the first insulating layer are respectively provided at both ends of the conductor along the winding direction, the first blank area and the second blank area are respectively located on two surfaces opposite to each other of the conductor, the first blank area is located in the inner circle of the conductor coil, the second blank area is located in the outer circle of the conductor coil, and the body is exposed in the first blank area and the second blank area;

[0006] A first lead terminal covers a first blank area and is electrically connected to the body in the first blank area;

[0007] The second lead-out terminal covers the second blank area and is electrically connected to the body in the second blank area.

[0008] Optionally, adhesive is provided between two adjacent turns of the conductor to bond the first insulating layers of the two adjacent turns.

[0009] Optionally, the winding further includes at least one of the following:

[0010] The second insulating layer covers the electrical connection between the first lead terminal and the first blank area, and the electrical connection between the second lead terminal and the second blank area.

[0011] Optionally, the winding further includes:

[0012] A third insulating layer is wound around the conductor loop to cover the outermost loop of the conductor;

[0013] a fourth insulating layer covering the surface of the innermost circle of the conductor;

[0014] a fifth insulating layer, covering the upper end surface of the conductor loop;

[0015] The sixth insulating layer covers the lower end surface of the conductor loop.

[0016] Optionally, the first lead-out terminal includes a first main body portion, and a first extension portion formed by bending the first main body portion toward the outer circle of the conductor circle, the first main body portion covers the first blank area and is electrically connected to the body in the first blank area; a seventh insulating layer is provided on the side of the first lead-out terminal facing away from the conductor circle, and the seventh insulating layer at least covers the overlapping area of ​​the orthographic projection of the first extension portion and the conductor circle.

[0017] Optionally, the second lead terminal includes a second main body portion, and a second extension portion formed by bending the second main body portion away from the conductor loop, the second main body portion covers the second blank area and is electrically connected to the body in the second blank area, and the first extension portion and the second extension portion are arranged opposite to each other and flush.

[0018] Optionally, a cross-sectional area of ​​the conductor along the winding direction of the conductor loop is S0; a conductor area of ​​the first main body is S1, and satisfies: S1=k*S0, 75%≤k≤125%.

[0019] Optionally, in the inner circle of the conductor circle, the conductor is provided with a first redundant portion located between the first lead terminal and the corresponding end portion of the conductor, and the first redundant portion is wound into n turns along the winding direction, where n is a positive number; and / or, in the outer circle of the conductor circle, the conductor is provided with a second redundant portion located between the second lead terminal and the corresponding end portion of the conductor, and the second redundant portion is wound into m turns along the winding direction, where m is a positive number.

[0020] Optionally, a protrusion is provided at one end of the first lead terminal electrically connected to the first blank area, and the protrusion extends out of the conductor and is used to fix the first lead terminal so that the conductor is wound around the accommodating area in circles.

[0021] The present application provides a magnetic element, comprising a winding as described in any one of the above items.

[0022] As described above, the conductor coils of the winding of the present application are formed by winding strip-shaped conductors one by one, with a large conductor contact area and few gaps between coils, a compact structure, and a high space utilization rate. Moreover, the strip-shaped conductor has a large cross-sectional area, which is not only easy to realize automated production, but also can meet the application requirements of small space and large current. At the same time, the structural strength of the conductor coil is relatively high, and the conductors of each coil are not easy to move when preparing magnetic elements by molding, for example, thereby reducing the risk of poor insulation between coils. In addition, the first lead-out terminal and the second lead-out terminal are electrically connected to the two ends of the conductor coil, which is equivalent to externalizing the electrical connection part of the conductor coil, so that the insulating layer of the conductor coil (i.e., the first insulating layer) can be avoided from burning when welding with the base terminal of the magnetic element, thereby avoiding the paint film from burning back and reducing the risk of poor insulation between coils. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 and Figure 2 It is a structural schematic diagram of two perspectives of a winding provided in an embodiment of the present application;

[0024] Figure 3 It is a schematic diagram of a conductor provided by the present application provided with a first blank area and a second blank area;

[0025] Figure 4 is a schematic diagram of electrically connecting a conductor to a first lead terminal and a second lead terminal;

[0026] Figure 5 is based on Figure 4 A schematic diagram of the structure after the structure shown is wound;

[0027] Figure 6 is another schematic diagram of electrically connecting a conductor to a first lead terminal and a second lead terminal.

[0028] Winding 1

[0029] Conductor ring 10

[0030] Accommodating area 10a Conductor 101 Body 102 First insulating layer 103

[0031] First blank area 104 Second blank area 105 Third insulating layer 106

[0032] The first lead terminal 11

[0033] The first main body portion 111 and the first extension portion 112 are protrusions 110

[0034] The second lead terminal 12

[0035] The second main body portion 121 and the second extension portion 122 DETAILED DESCRIPTION

[0036] In order to solve the above problems existing in the prior art, the present application provides a winding and a magnetic element having the winding. The two protection themes are based on the same concept, and the principles of solving the problems are basically the same or similar. The implementation methods of each protection theme can refer to each other, and the repeated parts will not be repeated.

[0037] The winding of the present application includes a conductor ring, a first lead-out terminal and a second lead-out terminal. The conductor ring is formed by winding a strip conductor one ring at a time. The conductor contact area between the rings is large and the gaps are small. The structure is compact and the space utilization rate is high. In addition, the strip conductor has a large cross-sectional area, which is not only easy to realize automated production, but also can meet the application requirements of small space and large current. At the same time, the structural strength of the conductor ring is high. When the magnetic element is prepared by molding, for example, the conductors of each ring are not easy to move, thereby reducing the risk of poor insulation between the rings. In addition, the first lead-out terminal and the second lead-out terminal are electrically connected to the first blank area and the second blank area at both ends of the conductor ring, respectively, which is equivalent to externalizing the electrical connection part of the conductor ring, so as to avoid burning the insulation layer of the conductor ring, that is, the first insulation layer, when welding with the base terminal of the magnetic element, avoid the paint film from burning back, and reduce the risk of poor insulation between the rings.

[0038] In the winding, the specific expressions of parameters such as shape, quantity, size, etc. of the conductor loop, the first lead terminal, the second lead terminal, the first blank area, and the second blank area can be determined according to the actual application scenario and the required adaptability of the configuration, and this application does not limit them.

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. In the absence of conflict, the following embodiments and their technical features can be combined with each other and also belong to the technical solutions of the present application.

[0040] In the description of the embodiments of the present application, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the corresponding embodiments, rather than indicating or implying that a device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation on the present application.

[0041] In order to facilitate the description and understanding of the solution of this application, Figure 1 and Figure 2 The placement orientation shown, hereinafter the width direction of the winding is referred to as the first direction x, the thickness direction (or "height direction") is referred to as the second direction y, and the length direction is referred to as the third direction z. The first direction x, the second direction y and the third direction z are perpendicular to each other and can be regarded as the three coordinate axes of the three-dimensional rectangular coordinate system. It should be understood that the so-called perpendicularity in the whole application does not require that the angle between the two must be 90°, but allows a deviation of, for example, ±10°, that is, the so-called perpendicularity can be understood as the angle between any two directions is 80° to 100°. Similarly, the so-called parallelism in the whole application does not require that the angle between the two must be 0° or 180°, but allows a deviation of, for example, ±10°, that is, the so-called parallelism can be understood as the angle between any two directions is 0° to 10° or 170° to 190°.

[0042] Please also read Figures 1 to 6 The winding 1 of one embodiment of the present application includes a conductor ring 10 , a first lead terminal 11 and a second lead terminal 12 .

[0043] The conductor ring 10 is formed by winding a strip-shaped (or long strip-shaped) conductor 101 around an accommodation area 10a, which can be regarded as a cavity where the inner ring of the conductor ring 10 is located, and can be the area extended around the axis during winding. The thickness of the conductor ring 10 (i.e., the length along the second direction y, also called "height") can be equal to the width of the conductor 101.

[0044] The conductor 101 includes a body 102 and a first insulating layer 103 coated on the outer surface of the body 102. The body 102 is a conductive member. Along the winding direction, the two ends of the conductor 101 are respectively provided with a first blank area 104 and a second blank area 105 not covered by the first insulating layer 103, where the body 102 is exposed in the first blank area 104 and the second blank area 105; the first blank area 104 and the second blank area 105 are respectively located on the two surfaces of the conductor 101 that are arranged opposite to each other, and for the wound conductor ring 10, the first blank area 104 is located in the inner ring of the conductor ring 10, and the second blank area 105 is located in the outer ring of the conductor ring 10.

[0045] The first lead terminal 11 covers the first blank area 104 and is electrically connected to the body 102 in the first blank area 104; the second lead terminal 12 covers the second blank area 105 and is electrically connected to the body 102 in the second blank area 105. Both the first lead terminal 11 and the second lead terminal 12 are conductive members, such as sheet-shaped or strip-shaped structural members, and the widths of the two may be the same and the conductive properties may also be the same.

[0046] The first lead terminal 11 and the second lead terminal 12 are electrically connected to the two ends of the conductor coil 10 along the winding direction, which is equivalent to externalizing the electrical connection part of the conductor coil 10 so that the conductor coil 10 can be electrically connected to the pin electrodes of the base when the winding 1 is assembled with the base of the magnetic element.

[0047] The shapes of the first lead terminal 11 and the second lead terminal 12 can be adaptively changed according to the assembly scenario. Figure 1 and Figure 2 In the scenario shown, the first lead-out terminal 11 includes a first main body portion 111, and a first extension portion 112 formed by bending the first main body portion 111 toward the outer circle of the conductor circle 10, the first main body portion 111 covers the first blank area 104 and is electrically connected to the main body 102 in the first blank area 104; the second lead-out terminal 12 includes a second main body portion 121, and a second extension portion 122 formed by bending the second main body portion 121 away from the conductor circle 10, the second main body portion 121 covers the second blank area 105 and is electrically connected to the main body 102 in the second blank area 105. Optionally, the first extension portion 112 and the second extension portion 122 are arranged relative to each other and are flush, so that the coplanarity of the winding 1 is higher.

[0048] Below Figures 1 to 6 The example shown describes the production process of the conductor ring 10.

[0049] S11: cutting the conductor 101 into a preset length, which is a flat plate-shaped structural member at this time;

[0050] S12: Figure 3 As shown, the first insulating layer 103 at the preset positions at both ends of the conductor 101 is removed to form the first blank area 104 and the second blank area 105; wherein the method of removing the first insulating layer 103 includes but is not limited to at least one of laser demolding, mechanical demolding, and chemical demolding;

[0051] S13: Figure 4 As shown, a first lead terminal 11 and a second lead terminal 12 in the form of an elongated strip are provided, neither of which is a flat structural member that is not bent, and the first lead terminal 11 of this form is electrically connected to the first blank area 104, and the second lead terminal 12 of this form is electrically connected to the second blank area 105; wherein the method for achieving electrical connection includes but is not limited to ultrasonic welding or laser welding.

[0052] S14: Figure 5As shown, the flat conductor 101 is wound circle by circle; in one example, a protrusion 110 is provided at one end of the first lead terminal 11 electrically connected to the first blank area 104, for example, the protrusion 110 is provided at the free end of the first main body 111, and the protrusion 110 extends out of the conductor 101. The protrusion 110 is clamped by a winding tool to fix the first lead terminal 11 so that the conductor 101 is stationary at this end, and the winding tool acts on the conductor 101 so that the conductor 101 is automatically wound circle by circle around the accommodating area 10a.

[0053] S15: Combined Figure 5 , Figure 1 and Figure 2 As shown, in Figure 5 On the basis of the structure shown, the first lead terminal 11 and the second lead terminal 12 are bent to obtain the first lead terminal 11 having the aforementioned first main body portion 111 and the first extension portion 112, and the second lead terminal 12 having the aforementioned second main body portion 121 and the second extension portion 122, so as to obtain the winding 1.

[0054] In another example, the manufacturing process of the conductor ring 10 may be as follows:

[0055] S21: cutting the conductor 101 into a preset length, which is a flat plate-shaped structural member at this time;

[0056] S22: Figure 3 As shown, the first insulating layer 103 at the preset positions at both ends of the conductor 101 is removed to form the first blank area 104 and the second blank area 105; wherein the method of removing the first insulating layer 103 includes but is not limited to at least one of laser demolding, mechanical demolding, and chemical demolding;

[0057] S23: Figure 4 As shown, a first lead terminal 11 and a second lead terminal 12 in the form of an elongated strip are provided, neither of which is a flat structural member that is not bent, and the first lead terminal 11 of this form is electrically connected to the first blank area 104, and the second lead terminal 12 of this form is electrically connected to the second blank area 105; wherein the method for achieving electrical connection includes but is not limited to ultrasonic welding or laser welding.

[0058] S24: Figure 6 As shown, the first lead terminal 11 and the second lead terminal 12 are bent to obtain the first lead terminal 11 having the first main body portion 111 and the first extension portion 112 , and the second lead terminal 12 having the second main body portion 121 and the second extension portion 122 .

[0059] S25: Combined Figure 6 , Figure 1 and Figure 2As shown, in Figure 6 On the basis of the structure shown, the flat conductor 101 is wound circle by circle to obtain the winding 1; the specific method of winding circle by circle can refer to the description of S14 above.

[0060] As described above, the conductor coil 10 of the winding 1 of the present application is formed by winding a strip conductor 101 turn by turn. The contact area of ​​the conductor 101 between the coils is large and the gaps are small. The structure is compact and the space utilization rate is high. In addition, the strip conductor 101 has a large cross-sectional area, which is not only easy to realize automated production, but also can meet the application requirements of small space and large current. At the same time, the structural strength of the conductor coil 10 is high. When the magnetic element is prepared by molding, for example, the coils of the conductor 101 are not easy to move, thereby reducing the risk of poor insulation between the coils of the conductor 101. In addition, the first lead terminal 11 and the second lead terminal 12 are electrically connected to the two ends of the conductor coil 10, which is equivalent to externalizing the electrical connection part of the conductor coil 10, so that the insulating layer of the conductor coil 10, that is, the first insulating layer 103, can be avoided from burning when welding with the base terminal of the magnetic element, thereby avoiding the generation of paint film burnback, and further reducing the risk of poor insulation between the coils of the conductor 101.

[0061] In one example, adhesive is provided between two adjacent turns of the conductor 101 to bond the first insulating layer 103 of the two adjacent turns. The structure of the conductor turn 10 is realized as: body 102 - first insulating layer 103 - adhesive - first insulating layer 103 - body 102, which is more compact and has a more stable shape.

[0062] In one example, the winding 1 further includes a second insulating layer, Figure 4 As shown, after the aforementioned step S13 or S23, the second insulating layer can be covered on the electrical connection between the first lead terminal 11 (the first main body 111) and the first blank area 104, and the electrical connection between the second lead terminal 12 (the second main body 121) and the second blank area 105. The present application can adopt spraying or dipping ultraviolet light curing paint and then curing by ultraviolet light, or encapsulation to prepare the second insulating layer.

[0063] In one example, combining Figure 1 and Figure 2As shown, the winding 1 also includes at least one of a third insulating layer 106, a fourth insulating layer, a fifth insulating layer and a sixth insulating layer. The third insulating layer 106 is wound around the conductor ring 10 to cover the outer surface of the outermost ring of the conductor 101. The third insulating layer 106 can be a tape with good insulation performance, which can not only make the structure of the conductor ring 10 more compact and the shape more stable, but also further improve the insulation performance of the conductor ring 10 from the outside. The fourth insulating layer covers the surface of the innermost ring of the conductor ring 10. The fifth insulating layer covers the upper end surface of the conductor ring 10. The sixth insulating layer covers the lower end surface of the conductor ring 10.

[0064] An insulating layer may be provided in a local area of ​​the first lead terminal 11. For example, a seventh insulating layer may be provided on the side of the first lead terminal 11 facing away from the conductor ring 10, and the seventh insulating layer at least covers the overlapping area of ​​the orthographic projection of the first extension portion 112 and the conductor ring 10. Of course, the seventh insulating layer may also cover the two side surfaces of the first extension portion 112, and may also be extended to the first main body portion 111. In this regard, the present application can improve the insulation performance of the winding 1 on the lead terminal side.

[0065] Here, in another example, the manufacturing process of the conductor ring 10 may be as follows:

[0066] S31: cutting the conductor 101 into a preset length, which is a flat plate-shaped structural member, and at least one of the upper and lower surfaces in the thickness direction of the conductor 101 is covered with a first insulating layer 103;

[0067] S32: Figure 3 As shown, the first insulating layer 103 at the preset positions at both ends of the conductor 101 is removed to form the first blank area 104 and the second blank area 105; wherein the method of removing the first insulating layer 103 includes but is not limited to at least one of laser demoulding, mechanical demoulding, and chemical demoulding; for a surface of the conductor 101 where the first insulating layer 103 is not provided, a corresponding blank area can be defined;

[0068] S33: Figure 4 As shown, a first lead terminal 11 and a second lead terminal 12 in the form of an elongated strip are provided, neither of which is a flat structural member that is not bent, and the first lead terminal 11 of this form is electrically connected to the first blank area 104, and the second lead terminal 12 of this form is electrically connected to the second blank area 105; wherein the method for achieving electrical connection includes but is not limited to ultrasonic welding or laser welding.

[0069] S34: Figure 5As shown, the flat conductor 101 is wound circle by circle; in one example, a protrusion 110 is provided at one end of the first lead terminal 11 electrically connected to the first blank area 104, for example, the protrusion 110 is provided at the free end of the first main body 111, and the protrusion 110 extends out of the conductor 101. The protrusion 110 is clamped by a winding tool to fix the first lead terminal 11 so that the conductor 101 is stationary at this end, and the winding tool acts on the conductor 101 so that the conductor 101 is automatically wound circle by circle around the accommodating area 10a.

[0070] S35: Supplementary insulation is performed on the finished product after S34, and the insulation layer of the supplementary insulation includes at least one of the third insulation layer, the fourth insulation layer, the fifth insulation layer and the seventh insulation layer. In the case where the first insulation layer 103 is not provided on a surface of the conductor 101, the supplementary insulation layer also includes the first insulation layer 103 corresponding to the surface. The method of the supplementary insulation layer includes but is not limited to at least one of dipping, coating and spraying.

[0071] S36: Combined Figure 5 , Figure 1 and Figure 2 As shown, in Figure 5 On the basis of the structure shown, the first lead terminal 11 and the second lead terminal 12 are bent to obtain the first lead terminal 11 having the aforementioned first main body portion 111 and the first extension portion 112, and the second lead terminal 12 having the aforementioned second main body portion 121 and the second extension portion 122, so as to obtain the winding 1.

[0072] In one example, the cross-sectional area of ​​the conductor 101 along the winding direction of the conductor coil 10 (i.e., the cross-sectional area of ​​the conductor coil 10 along the winding direction, for example, the conductor coil 10 in Figure 1 The xy cross-sectional area of ​​the left side of the first main body 111 is S0; the conductor area of ​​the first main body 111 is S1, and satisfies: S1 = k*S0, 75% ≤ k ≤ 125%. Here, the current cross-sectional area of ​​the conductor coil 10 and the current cross-sectional area of ​​the first lead terminal 11 (or the second lead terminal 12) are controlled within the threshold value, so that the inductance performance of the magnetic element applicable to the winding 1 can be ensured.

[0073] In one example, in the inner circle of the conductor circle 10, the conductor 101 is provided with a first redundant portion, the first redundant portion is located between the first lead terminal 11 and the corresponding end of the conductor 101, and the first redundant portion is wound into n turns along the winding direction, where n is a positive number, for example, 0.2 turns, 0.5 turns or 1.5 turns. In this regard, the present application can ensure that there is a certain distance between the first lead terminal 11 and the end of the inner circle of the conductor 101, so as to avoid electrical contact between the first lead terminal 11 and the body 102 exposed by the end.

[0074] Similarly, in the outer ring of the conductor ring 10, the conductor 101 may be provided with a second redundant portion, the second redundant portion being located between the second lead terminal 12 and the corresponding end of the conductor 101, and the second redundant portion being wound into m turns along the winding direction, where m is a positive number, for example, 0.2 turns, 0.5 turns or 1.5 turns. In this regard, the present application may allow a certain distance between the second lead terminal 12 and the end of the outer ring of the conductor 101 to prevent the second lead terminal 12 from electrically contacting the body 102 exposed by the end.

[0075] The present application also provides a magnetic element, including a winding 1 as in any of the above examples, which has the beneficial effects that can be produced by the winding 1 in the corresponding example, and will not be described in detail here.

[0076] It should be understood that the magnetic element 1 provided in the present application is a complete device, and may also have structural elements corresponding to known devices, which will not be described one by one here. For example, the magnetic element may be an inductor, which also includes a magnetic core and a base. The shape, quantity, size and other parameters of these structural elements, as well as the specific matching and connection relationship, can be determined according to the adaptability of the actual scene, and this application does not limit them.

[0077] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. For ordinary technicians in this field, all equivalent structural changes made using the contents of this specification and drawings are also included in the patent protection scope of the present application.

[0078] Although the terms "first, second", etc. are used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. In addition, the singular forms "one", "an", and "the" are intended to include plural forms as well. The terms "or" and "and / or" are interpreted as inclusive, or mean any one or any combination. Only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way, an exception to this definition will occur.

Claims

1. A winding, characterized in that: include: A conductor coil, formed by winding a strip conductor around a containing area in a circle, the conductor comprising a body and a first insulating layer coated on the outer surface of the body, a first blank area and a second blank area not covered by the first insulating layer are respectively provided at both ends of the conductor along the winding direction, the first blank area and the second blank area are respectively located on two surfaces opposite to each other of the conductor, the first blank area is located in the inner circle of the conductor coil, the second blank area is located in the outer circle of the conductor coil, and the body is exposed in the first blank area and the second blank area; A first lead terminal covers a first blank area and is electrically connected to the body in the first blank area; The second lead-out terminal covers the second blank area and is electrically connected to the body in the second blank area.

2. The winding according to claim 1, characterized in that Adhesive is arranged between two adjacent turns of the conductor to bond the first insulating layers of the two adjacent turns.

3. The winding according to claim 1, characterized in that The winding further comprises: The second insulating layer covers the electrical connection between the first lead terminal and the first blank area, and the electrical connection between the second lead terminal and the second blank area.

4. The winding according to claim 1, characterized in that The winding further comprises at least one of the following: a third insulating layer, wound around the circumference of the conductor loop to cover the surface of the outermost loop of the conductor; a fourth insulating layer covering the surface of the innermost circle of the conductor; a fifth insulating layer, covering the upper end surface of the conductor loop; The sixth insulating layer covers the lower end surface of the conductor loop.

5. The winding according to claim 1, characterized in that The first lead terminal includes a first main body portion and a first extension portion formed by bending the first main body portion toward the outer ring of the conductor ring, the first main body portion covers the first blank area and is electrically connected to the body in the first blank area; A seventh insulating layer is disposed on a side of the first lead-out terminal facing away from the conductor loop, and the seventh insulating layer at least covers an overlapping area between the orthographic projection of the first extension portion and the conductor loop.

6. The winding according to claim 5, characterized in that The second lead terminal includes a second main body portion and a second extension portion formed by bending the second main body portion away from the conductor loop, the second main body portion covers the second blank area and is electrically connected to the body in the second blank area, and the first extension portion and the second extension portion are arranged opposite to each other and flush.

7. The winding according to claim 5 or 6, characterized in that: The cross-sectional area of ​​the conductor along the winding direction of the conductor coil is S0; The conductor area of ​​the first main body is S1, and satisfies: S1=k*S0, 75%≤k≤125%.

8. The winding according to any one of claims 1 to 6, characterized in that In the inner circle of the conductor circle, the conductor is provided with a first redundant portion located between the first lead terminal and the corresponding end of the conductor, and the first redundant portion is wound into n circles along the winding direction, where n is a positive number; and / or, In the outer circle of the conductor circle, the conductor is provided with a second redundant portion located between the second lead terminal and the corresponding end of the conductor, and the second redundant portion is wound into m circles along the winding direction, where m is a positive number.

9. The winding according to claim 1, characterized in that One end of the first lead terminal electrically connected to the first blank area is provided with a protrusion, and the protrusion extends out of the conductor and is used to fix the first lead terminal so that the conductor is wound around the accommodating area in circles.

10. A magnetic element, characterized in that: Comprising the winding according to any one of claims 1 to 9.

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