CN212434443U - Coil structure and magnetic element - Google Patents
Coil structure and magnetic element Download PDFInfo
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- CN212434443U CN212434443U CN202021602415.3U CN202021602415U CN212434443U CN 212434443 U CN212434443 U CN 212434443U CN 202021602415 U CN202021602415 U CN 202021602415U CN 212434443 U CN212434443 U CN 212434443U
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Abstract
The utility model relates to the technical field of electronic components, in particular to a coil structure and a magnetic element, wherein the coil structure comprises a coil section and a wiring terminal, and the coil section is formed by winding a wire along the axial direction; the wiring terminal is led out from the end part of the coil section and is bent towards one side which is positioned on the axial direction of the coil section and is far away from the direction of the coil section. When the coil structure is applied to a magnetic element, the coil structure does not need to be connected with a lead frame, and a wiring terminal led out from the end part of the coil section can be directly used as an external connection terminal of the magnetic element, so that the integrity of the magnetic element is enhanced, the vibration resistance of the magnetic element is further improved, and the coil structure is convenient to apply to vehicle-mounted or airborne high-vibration environments. With binding post towards the orientation that is located the ascending one side of axial of coil section and keeps away from the coil section and buckle, help extending binding post to the outside, be convenient for realize being connected with external device when in actual application.
Description
Technical Field
The utility model relates to an electronic components technical field especially relates to a coil structure and magnetic element.
Background
In the field of electronics, magnetic elements are the core components of energy conversion and storage, and their performance is related to the efficiency and performance of the overall system. The magnetic element mainly includes an inductor and a transformer, wherein, taking the inductor as an example, the inductor is an element capable of converting electric energy into magnetic energy and storing the magnetic energy, and is also called a choke, a reactor or a dynamic reactor.
The conventional inductor is generally manufactured by winding a lead on a cylindrical center pillar to form a cylindrical hollow coil, spot-welding two leads of the hollow coil to two pins of a lead frame, and performing a subsequent pressing process. However, the process depends on the connection between the lead frame and the coil, which causes instability of the performance of the inductor once the connection between the coil and the lead frame is unstable when the pressed inductor is applied to high-vibration environments such as vehicle-mounted or airborne environments, and the use effect of the inductor is affected.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to provide a coil structure and a magnetic element in order to solve the problem of poor vibration resistance of the conventional inductor.
A coil structure comprising:
the coil section is formed by winding a conducting wire along the axial direction;
and the wiring terminal is led out from the end part of the coil section and is bent towards the direction which is positioned on one side of the coil section in the axial direction and is far away from the coil section.
In one embodiment, the cross-sectional shape of the coil segment comprises a square.
In one embodiment, the coil segment has a structure of M layers and N turns, M is a natural number greater than or equal to 2, and N is a natural number greater than or equal to 2.
In one embodiment, the terminals are perpendicular to the coil segments.
In one embodiment, the connecting terminal is flat, and the periphery of the connecting terminal is coated with a metal connecting layer.
In one embodiment, the metal connection layer comprises a tin layer.
In one embodiment, the coil segment includes a first end portion and a second end portion, and the connection terminal includes a first terminal corresponding to the first end portion and a second terminal corresponding to the second end portion.
In one embodiment, the first terminal and the second terminal are located on the same side of the coil segment in the axial direction or located on two sides of the coil segment in the axial direction respectively.
In one embodiment, the wire comprises a strip wire or a round wire.
A magnetic element comprises the coil structure.
When the coil structure is applied to a magnetic element, the coil structure does not need to be connected with a lead frame, and a wiring terminal led out from the end part of the coil section can be directly used as an external connection terminal of the magnetic element, so that the integrity of the magnetic element is enhanced, the vibration resistance of the magnetic element is further improved, and the coil structure is convenient to apply to vehicle-mounted or airborne high-vibration environments. With binding post towards the orientation that is located the ascending one side of axial of coil section and keeps away from the coil section and buckle, help extending binding post to the outside, be convenient for realize being connected with external device when in actual application. Meanwhile, the inductor is not required to be connected with a lead frame, so that the cracking phenomenon in the process of pressing the inductor is avoided, and the reject ratio is reduced.
Drawings
Fig. 1 is a schematic structural view of the coil structure provided in this embodiment before bending the terminal;
fig. 2 is a schematic structural view of the coil structure provided in this embodiment after bending the terminal.
Description of reference numerals:
10. a coil segment; 101. a first end portion; 102. a second end portion; 20. a wiring terminal; 201. a first terminal; 202. a second terminal; 30. and a metal connecting layer.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
As described in the background art, the conventional inductor is generally manufactured by winding a lead wire on a cylindrical center pillar to form a cylindrical hollow coil, spot-welding two leads of the hollow coil to two leads of a lead frame, and performing a subsequent pressing process. However, the process depends on the connection between the lead frame and the coil, which causes instability of the performance of the inductor once the connection between the coil and the lead frame is unstable when the pressed inductor is applied to high-vibration environments such as vehicle-mounted or airborne environments, and the use effect of the inductor is affected.
In order to solve the above problems, the present application provides a coil structure, which can be applied to a magnetic element such as an inductor or a transformer, and the inductor is exemplified herein.
As shown in fig. 1 and 2, the coil structure provided by the present embodiment includes a coil segment 10 and a connection terminal 20. The coil section 10 is formed by winding a conducting wire along an axial direction, where the axial direction refers to a central axis direction referred to when the coil section 10 is wound, and the axial direction herein is a central axis direction of the coil section 10. The winding mode of the wire is not unique, but one end of the wire can be kept still, the other end of the wire is pulled to be wound to form the coil section 10, the middle part of the wire can also be kept fixed, meanwhile, the two ends of the wire are pulled to be wound in opposite directions to form the coil section 10, and other winding modes can be adopted, which are not listed. The connection terminal 20 is led out from the end of the coil segment 10, and is bent toward a direction that is located on one side of the coil segment 10 in the axial direction and away from the coil segment 10 (refer to fig. 2), and the connection terminal 20 may directly serve as a terminal for connecting an external device. The connection terminal 20 and the coil segment 10 are integrally formed, and the connection between the two is not required to be performed by welding or the like, that is, the connection terminal 20 is formed by processing an end portion of the coil segment 10.
When the coil structure is applied to a magnetic element, the coil structure is not required to be connected with a lead frame, but the wiring terminal 20 led out from the end part of the coil section 10 is directly used as an external connection terminal of the magnetic element, so that the integrity of the magnetic element is enhanced, the vibration resistance of the magnetic element is further improved, and the coil structure is convenient to apply to vehicle-mounted or airborne high-vibration environments. Bending the connection terminal 20 toward a direction away from the coil segment 10 on one side of the coil segment 10 in the axial direction helps to extend the connection terminal 20 to the outside, so that connection with an external device is realized in practical use. Meanwhile, the inductor is not required to be connected with a lead frame, so that the cracking phenomenon in the process of pressing the inductor is avoided, and the reject ratio is reduced.
In one embodiment, the cross-sectional shape of the coil segment 10 includes a square. In the conventional technology, a wire is usually wound into a cylindrical hollow coil structure, that is, the cross section of the coil section 10 is circular, but a general finished inductor is in a rectangular parallelepiped shape, and when a cylindrical coil is applied to the rectangular parallelepiped inductor, the coil cannot exert its magnetic performance in the inductor with maximum efficiency. Based on the problem, in the present embodiment, the coil section 10 is wound into a rectangular parallelepiped shape, that is, the cross section of the coil section 10 is square, so that the coil section 10 can be maximally adapted to the structure of the finished inductor, and when the coil is applied to a conventional rectangular parallelepiped inductor, the magnetic performance of the coil can be maximally exerted, and the use performance of the inductor can be improved. Wherein the square is one of squares, and the cross-sectional shape of the coil segment 10 is preferably set to be square in the present embodiment.
In practice, the wire may be formed into a rectangular parallelepiped coil section 10 by winding around a rectangular parallelepiped pillar.
In one embodiment, the coil segment 10 has a structure of M layers and N turns, where M is a natural number greater than or equal to 2, and N is a natural number greater than or equal to 2. That is, compared to the conventional single-layer single-coil structure, the magnetic performance of the coil segment 10 wound in the present embodiment is further enhanced by winding the coil segment into a multi-layer multi-coil structure.
As a further preferred embodiment, referring to fig. 2, M is set to 5 and N is set to 2. The coil structure of 5 layers and 2 circles is matched with the structure of a general finished inductor, and the actual requirements are met. Of course, M may also be set to 2 or 3 or 4 or 6, etc., N may also be set to 3 or 4 or 5, etc., and M and N may be set according to actual requirements.
In one embodiment, the terminals 20 are perpendicular to the coil segment 10. Specifically, the connection terminals 20 are led out from the end of the coil segment 10, and are bent toward one side in the axial direction of the coil segment 10 and in a direction perpendicular to the coil segment 10, that is, the connection terminals 20 are perpendicular to the circumferential direction of the coil segment 10. This makes it possible to make the connection terminal 20 extend as far as possible outward to be highlighted, and when the coil structure is applied to an inductor, the connection terminal 20 can be exposed from the finished inductor to perform its function of connecting with the outside.
Alternatively, the terminal 20 may not be perpendicular to the coil segment 10, and the bending direction of the terminal 20 may be an acute angle with the axial direction of the coil segment 10, for example, 20 degrees, 30 degrees, or 40 degrees, which may be set according to practical requirements, and is not limited herein.
In one embodiment, the terminal 20 is flat, and the periphery of the terminal 20 is covered with a metal connection layer 30. Specifically, after the coil segment 10 is wound and the connection terminal 20 is led out, the connection terminal 20 may be flattened. Generally, the lead wire is made of an enameled wire and includes a conductive layer (e.g., a copper layer) and an insulating layer coated on the outer portion of the conductive layer, after the connection terminal 20 is flattened, the insulating layer on the outer portion of the connection terminal 20 is removed to expose the conductive layer inside, and then the metal connection layer 30 is coated on the outer portion of the conductive layer, where the metal connection layer 30 is disposed to facilitate connection between the connection terminal 20 and an external device.
In one embodiment, the metal connection layer 30 comprises a tin layer. The tin material is widely applied to connection between electronic devices, so that the tin layer is selected as the metal connection layer 30 in the embodiment, and implementation is facilitated. In practical applications, a tin layer may be formed on the periphery of the connection terminal 20 through an electroplating process.
As an alternative, the metal connection layer 30 may be another metal material layer for facilitating the connection between the connection terminal 20 and the external electronic device.
In the present embodiment, the coil segment 10 generally includes a first end portion 101 and a second end portion 102, and the connection terminal 20 includes a first terminal 201 corresponding to the first end portion 101 and a second terminal 202 corresponding to the second end portion 102. That is, the first terminal 201 is drawn from the first end 101 of the coil segment 10, and the second terminal 202 is drawn from the second end 102 of the coil segment 10. The bending directions of the first terminal 201 and the second terminal 202 may be the same, for example, both are perpendicular to the circumferential direction of the coil segment 10, or may be different, for example, the first terminal 201 is perpendicular to the circumferential direction of the coil segment 10, and the second terminal 202 is not perpendicular to the circumferential direction of the coil segment 10.
In one embodiment, the first terminal 201 and the second terminal 202 are located on the same side of the coil segment 10 in the axial direction. Assuming that the coil segment 10 has a first side and a second side in the axial direction, the first terminal 201 and the second terminal 202 are both located at the first side or both located at the second side.
As an alternative embodiment, the first terminal 201 and the second terminal 202 are respectively located on both sides in the axial direction of the coil segment 10. That is, the first terminal 201 is located at the first side of the coil segment 10 and the second terminal 202 is located at the second side of the coil segment 10, or the first terminal 201 is located at the second side of the coil segment 10 and the first terminal 201 is located at the first side of the coil segment 10.
The above distribution of the first terminals 201 and the second terminals 202 is suitable for the present application, and the specific distribution of the first terminals 201 and the second terminals 202 can be adjusted according to different winding manners of the coil segment 10. In the present embodiment, the first terminal 201 and the second terminal 202 are preferably disposed on the same side in the axial direction of the coil segment 10, and are both perpendicular to the circumferential direction of the coil segment 10.
In one embodiment, the wire comprises a strip wire or a round wire. The structure of a round wire is shown in fig. 1 and 2, a strip wire is not shown, and both a strip wire and a round wire are suitable for this scheme. As a preferred embodiment, a round wire is selected in this embodiment. Round wires are widely used and are regularly wound into the coil section 10.
The embodiment also provides a magnetic element which comprises the coil structure. The terminals 20 of the coil structure serve as external terminals 20 exposed from the magnetic element. Specifically, the magnetic element may further include a magnetic body covering the coil segment 10, the magnetic body being formed by pressing a magnetic material through a pressing process.
In this embodiment, the magnetic element may be a magnetic element such as an inductor or a transformer.
In the magnetic element, the internal coil structure is not required to be connected with the lead frame, but the wiring terminal 20 led out from the end part of the coil section 10 is directly used as an external connection terminal of the magnetic element, so that the integrity of the magnetic element is enhanced, the vibration resistance of the magnetic element is further improved, and the magnetic element is convenient to apply to high-vibration environments such as vehicle-mounted or airborne environments. Meanwhile, the lead frame is not required to be connected, so that the cracking phenomenon in the process of pressing the magnetic element is avoided, and the reject ratio is reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A coil structure, comprising:
the coil section is formed by winding a conducting wire along the axial direction;
and the wiring terminal is led out from the end part of the coil section and is bent towards the direction which is positioned on one side of the coil section in the axial direction and is far away from the coil section.
2. The coil structure of claim 1 wherein the cross-sectional shape of the coil segments comprises a square.
3. The coil structure according to claim 1, wherein the coil segment is a structure of M layers of N turns, M being a natural number equal to or greater than 2, and N being a natural number equal to or greater than 2.
4. The coil structure of claim 1 wherein the wire terminals are perpendicular to the coil segments.
5. The coil structure according to claim 4, wherein the terminals are flat, and the outer periphery of the terminals is covered with a metal connection layer.
6. The coil structure of claim 5 wherein the metal connection layer comprises a tin layer.
7. The coil structure of claim 1 wherein the coil segment includes a first end and a second end, and the wire terminals include a first terminal corresponding to the first end and a second terminal corresponding to the second end.
8. The coil structure according to claim 7, wherein the first terminal and the second terminal are located on the same side in an axial direction of the coil segment or on both sides in the axial direction of the coil segment, respectively.
9. A coil structure according to any one of claims 1 to 8, wherein the wire comprises a strip-shaped wire or a round wire.
10. A magnetic component comprising a coil structure as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021602415.3U CN212434443U (en) | 2020-08-05 | 2020-08-05 | Coil structure and magnetic element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021602415.3U CN212434443U (en) | 2020-08-05 | 2020-08-05 | Coil structure and magnetic element |
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| Publication Number | Publication Date |
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| CN212434443U true CN212434443U (en) | 2021-01-29 |
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| CN202021602415.3U Active CN212434443U (en) | 2020-08-05 | 2020-08-05 | Coil structure and magnetic element |
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| CP01 | Change in the name or title of a patent holder |
Address after: 314400 workshop 2, No.9 Caohejing Road, Haining Economic Development Zone, Haining City, Jiaxing City, Zhejiang Province Patentee after: Haining keyuli Electronic Technology Co.,Ltd. Address before: 314400 workshop 2, No.9 Caohejing Road, Haining Economic Development Zone, Haining City, Jiaxing City, Zhejiang Province Patentee before: Haining keyouli Electronic Technology Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |