Coil element

Abstract

The utility model relates to the technical field of magnetic devices, and discloses a coil element which comprises a magnetic core, a metal terminal and a coil composed of at least one wire, the magnetic core comprises a middle column and end polar plates connected to the two ends of the middle column, the coil is wound on the middle column according to a preset rule, each wire is provided with a metal lead wire body, and the metal lead wire body is connected with the metal terminal. One side, deviating from the middle column, of the end pole plate is connected with metal terminals which are oppositely arranged at certain intervals, one side of each metal terminal is integrally connected with a first functional pin, the side edges of the end pole plate are symmetrically provided with functional inclined planes, the functional inclined planes incline towards the middle column, and a preset inclination angle is formed between the functional inclined planes and the first direction; the first function pins are attached to the function inclined planes, and the metal lead wire bodies are in one-to-one correspondence with the first function pins and are electrically connected with the first function pins through the function inclined planes. The structural reliability of the coil element is improved, and the comprehensive performance of the coil element is optimized.

Description

Technical Field

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

[0002] Coil components are usually widely used in the automotive field to deal with problems related to electromagnetic compatibility and power supply filtering. They help reduce common-mode noise in power supply lines and ensure the normal operation of electronic equipment in automobiles. They are also effectively reduced by using them in automotive cables and signal lines to help automotive systems meet electromagnetic compatibility standards. Automobiles have a long service life. The national "Motor Vehicle Mandatory Scrapping Standard" stipulates that the mandatory scrapping life of passenger cars is more than 500,000 kilometers, and the safety and reliability requirements are strict. In the actual operating conditions of the automobile, the working environment is harsh, accompanied by mechanical vibration, uncertain mechanical shock, operating temperature in the range of -50℃ to +150℃, and various humidity conditions, salt spray conditions and altitudes, etc., which bring great challenges to the reliability of coil components in related technologies. In order to better meet the requirements of the vehicle environment for coil components, it is necessary to design a coil component with excellent reliability. Utility Model Content

[0003] In view of this, the present application provides a coil element to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solutions adopted are:

[0005] A coil element comprises a coil consisting of a magnetic core, a metal terminal and at least one conducting wire, wherein the magnetic core comprises a middle column and an end plate connected to both ends of the middle column, the coil is wound on the middle column according to a preset rule, each of the conducting wires has a metal lead body, the side of the end plate away from the middle column is connected to the metal terminals which are arranged opposite to each other and maintained at a certain interval, one side of the metal terminal is integrally connected to a first functional pin, the side of the end plate is symmetrically provided with functional inclined surfaces, the functional inclined surfaces are inclined toward the middle column and have a preset inclination angle with a first direction, the first functional pin is attached to the functional inclined surfaces, the metal lead body corresponds to the first functional pin one by one and is electrically connected to the first functional pin through the functional inclined surfaces.

[0006] The present application is further configured as follows: the preset inclination angle ranges from 5° to 80°.

[0007] The present application is further configured as follows: it also includes a magnetic cover plate, which is arranged on one side of the magnetic core and is respectively connected to the end plates.

[0008] The present application is further configured as follows: a first adhesive layer is provided on a side of the magnetic cover plate facing the end plate, and the first adhesive layer respectively adheres and fixes the magnetic cover plate and the magnetic core.

[0009] The present application is further configured as follows: a functional platform is integrally connected to the side of the end plate facing away from the magnetic cover plate, the functional platform protrudes from the functional inclined surface, and a second functional foot is symmetrically connected to one side of the metal terminal, the second functional foot is buckled on the functional platform and protrudes from the outer surface of the end plate.

[0010] The present application is further configured as follows: a certain distance is maintained between the symmetrically arranged second functional pins, and the symmetrically arranged second functional pins on the same end plate are located between the symmetrically arranged functional inclined surfaces.

[0011] The present application is further configured as follows: a welding portion is provided on the first functional pin, the metal lead body is electrically connected to the welding portion to form an electrode, and the welding portion is inclined toward the coil following the functional slope.

[0012] The present application is further configured as follows: a receiving groove is provided on a side of the end plate facing away from the coil, the metal terminal is connected in the receiving groove, and the receiving groove is connected and communicated with the functional inclined surface.

[0013] The present application is further configured as follows: a second adhesive layer is provided in the receiving groove, and the second adhesive layer adheres and fixes the metal terminal in the receiving groove.

[0014] The present application is further configured as follows: the integrally connected middle column and the end electrode plate form an I-shaped structure or a drum-shaped structure, the portion of the end electrode plate protruding from the middle column forms a side leg wall, and the height of the side leg wall relative to the middle column is greater than the height of the coil relative to the middle column.

[0015] In summary, compared with the prior art, the present application discloses a coil element, in which a coil composed of at least one wire is wound on the middle column of a magnetic core, each wire has a metal lead body, and metal terminals are provided on the end plates at both ends of the middle column, and the metal terminals are arranged relatively to each other and at a certain interval on the side of the end plate away from the middle column, and one side of the metal terminal is connected to a first functional pin, wherein functional inclined planes are symmetrically provided on the side of the end plate, the functional inclined planes are inclined toward the middle column and have a preset inclination angle with the first direction, the first functional pin is configured to fit on the functional inclined plane, and the winding lead joint corresponds to the first functional pin one by one and is electrically connected to the first functional pin through the functional inclined plane, that is, through the above-mentioned arrangement, the structural reliability of the coil element is improved, and the comprehensive performance of the coil element is optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of the coil element of this embodiment;

[0018] Figure 2 is a schematic side view of the coil element of this embodiment;

[0019] Figure 3 Schematic diagram of the three-dimensional structure of the magnetic core of the coil element of this embodiment. DETAILED DESCRIPTION

[0020] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0021] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0022] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application, and have no specific meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0024] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] The technical solutions shown in this application will be described in detail below through specific embodiments. It should be noted that the description order of the following embodiments is not intended to limit the priority order of the embodiments.

[0026] As described in the background technology, coil components in the prior art are widely used in the automotive field. However, in the actual operating conditions of the automobile, there are mechanical vibrations, uncertain mechanical shocks, operating temperatures ranging from -50°C to +150°C, various humidity conditions, salt spray conditions, and altitudes. The coil components in the related technology do not have the reliability to be suitable therefor, and thus cannot guarantee their good working life. Based on this, the present embodiment discloses a coil component.

[0027] Please refer to Figure 1 , Figure 2 as well as Figure 3 The coil element of this embodiment may include a coil 2 consisting of a magnetic core 1, a metal terminal 5 and at least one wire 22, the magnetic core 1 includes a middle column 11 and an end plate 4 connected to both ends of the middle column 11, the coil 2 is wound on the middle column 11 according to a preset rule, and each wire 22 has a metal lead body 21, the metal lead body 21 can be led out from both ends of the wire 22, the metal terminals 5 are relatively arranged and arranged at a certain interval on the side of the end plate 4 away from the middle column 11, wherein one side of the metal terminal 5 is integrally connected with a first functional pin 51, the side of the end plate 4 is symmetrically provided with a functional inclined surface 41, the functional inclined surface 41 is inclined toward the middle column 11 and has a preset inclination angle with the first direction, the first functional pin 51 is attached to the functional inclined surface 41, the metal lead body 21 corresponds to the first functional pin 51 one by one and is electrically connected to the first functional pin 51 through the functional inclined surface 41.

[0028] In the specific implementation process, Figure 2 Taking the constructed XY plane coordinates as an example, the X-axis direction can be regarded as the first direction of this embodiment, and the Y-axis direction can be regarded as the second direction of this embodiment. Of course, this embodiment is not limited to this. XY can also be any other directions perpendicular to each other in space in actual installation requirements, which will not be repeated here.

[0029] The first functional pin 51 of this embodiment is configured to fit on the functional inclined plane 41, that is, the first functional pin 51 can be regarded as inclined from the second direction to the first direction, that is, the first functional pin 51 is also inclined toward the coil 2 and has the same preset inclination angle as the functional inclined plane 41 with the first direction, so as to ensure the strict matching relationship between the first functional pin 51 and the functional inclined plane 41.

[0030] The sides of the first functional foot 51 and the functional inclined surface 41 facing each other can be both flat surfaces, that is, the first functional foot 51 and the functional inclined surface 41 can be fitted together without a gap.

[0031] It should be noted that, based on the structural design that the functional slope 41 is inclined toward the center column 11 and has a preset inclination angle with the first direction, and the one-to-one correspondence between the metal lead body 21 and the first functional pin 51, the metal lead body 21 of each coil 2 can be matched with a first functional pin 51 at the same end, and the functional slope 41 is used to guide the outlet of the metal lead body 21 and provide a safe space for the metal lead body 21, thereby ensuring a safe and firm electrical connection between the metal lead body 21 and the metal terminal 5, thereby ensuring the reliability of the coil element.

[0032] It should be noted that the functional bevel 41 is opened on the side of the end plate 4, or it can be understood that the functional bevel 41 is arranged on the side of the end plate 4 away from the coil 2 and the functional bevel 41 is connected and connected to the side wall of the end plate 4, so that it can play the role of a positioning groove to facilitate the assembly of the metal terminal 5.

[0033] The present embodiment is based on the structural design of the functional bevel 41, which can ensure that the functional bevel 41 has sufficient air space relative to the end plate 4, and then when the metal lead body 21 is electrically connected to the first functional pin 51, the connection point is within the air space, that is, the connection point will not affect the length direction dimension of the coil element, and there will be no risk of accidentally scratching the metal lead body 21 due to protruding from the end plate 4. At the same time, it can also ensure that there is sufficient physical isolation space between the connection point between the metal lead body 21 and the first functional pin 51 and the coil 2, avoiding the risk of high temperature melting of the coil 2 when the metal lead body 21 and the first functional pin 51 are fixed by welding, and can also prevent foreign matter from contaminating the coil 2 during the welding process, thereby improving the structural reliability of the coil element.

[0034] Combination Figure 2 The functional inclined surface 41 is set to be inclined toward the center column 11 and has a preset inclination angle Q with the first direction, and the size range of Q is 5-80°, thereby ensuring that the functional inclined surface 41 has sufficient air space relative to the end plate 4, and also allowing the metal lead body 21 to follow this slope and be tightly connected to the first functional foot 51, which helps to fix the metal lead body 21 and reduce its vibration or displacement.

[0035] In some embodiments, in order to ensure that the functional slope 41 has sufficient clearance space relative to the end plate 4, the metal lead body 21 can also be extended along this slope to be tightly connected with the first functional pin 51, and the inclined slope of the functional slope 41 can be used to hide the connection point between the metal lead body 21 and the first functional pin 51. The size range of Q can be 20-70°, 30-60° and 40-50°.

[0036] In some embodiments, the functional inclined surface 41 is set to be inclined toward the center column 11 and has a preset inclination angle Q with the first direction, and the magnitude of Q is 45°.

[0037] In some embodiments, the functional inclined surface 41 is set to be inclined toward the center column 11 and has a preset inclination angle Q with respect to the first direction, and the magnitude of Q is 10°.

[0038] The coil element of this embodiment may further include a magnetic cover plate 3, which is disposed on one side of the magnetic core 1 and is respectively connected to the end pole plates 4, so as to form a closed magnetic circuit with the magnetic core 1, wherein the side walls of the magnetic cover plate 3 and the end pole plates 4 may be located in the same plane, thereby facilitating multi-angle installation of the coil element during actual application.

[0039] In the specific implementation process, a first adhesive layer 6 is provided on the side of the magnetic cover plate 3 facing the end plate 4, and the first adhesive layer 6 respectively adheres and fixes the magnetic cover plate 3 and the magnetic core 1 to improve the fixed connection relationship between the magnetic cover plate 3 and the magnetic core 1.

[0040] Furthermore, a functional platform 42 is integrally connected to the side of the end plate 4 facing away from the magnetic cover plate 3, and the functional platform 42 protrudes from the functional inclined surface 41. A second functional pin 52 is symmetrically connected to one side of the metal terminal 5, and the second functional pin 52 is buckled on the functional platform 42 and protrudes from the outer surface of the end plate 4, so that the coil element can be externally connected through the second functional pin 52.

[0041] In some embodiments, the second functional pin 52 can be relatively perpendicular to the metal terminal 5, that is, the second functional pin 52 can maintain a 90° bending angle with the metal terminal 5. At the same time, the second functional pin 52 can also be parallel to the functional platform 42 on the end plate 4, so as to facilitate the overall structure of the coil element to be neat, and can also optimize the structural processing of the coil element and improve the cost performance of the coil element.

[0042] In some embodiments, the second functional foot 52 may be relatively perpendicular to the second direction and parallel to the first direction.

[0043] It should be noted that, in the coil element of the present embodiment, a certain distance is maintained between the symmetrically arranged second functional pins 52, and the symmetrically arranged second functional pins 52 on the same end plate 4 are located between the symmetrically arranged functional slopes 41, that is, when the coil element is connected to the external system through the second functional pins 52, the functional slopes 41 cooperate with the functional platform 42 to provide sufficient safety space for the routing of the metal lead body 21, and can prevent the metal lead body 21 from excessive contact with the outside world, thereby reducing the risk of accidentally scratching the metal lead body 21, thereby improving the operating safety of the coil element.

[0044] In the specific implementation process, a welding portion 53 is provided on the first functional pin 51, and the metal lead body 21 is electrically connected to the welding portion 53 to form an electrode. The welding portion 53 follows the functional slope 41 and is inclined toward the center column 11. Specifically, the metal lead body 21 of this embodiment is electrically connected to the first functional pin 51 through the welding portion 53. The connection method can be achieved by welding. In order to facilitate and quickly perform welding, the welding portion 53 can be designed as an oblate spheroid structure.

[0045] The conductor 22 of this embodiment can be made of copper enameled wire material. It can be understood that metallic copper is an excellent conductive material with low resistance characteristics. Using copper enameled wire as the coil 2 can reduce the resistance of the inductor element and improve the current transmission efficiency. Copper has good thermal conductivity and can effectively conduct heat away from the coil 2 to avoid degradation or damage of the inductor performance due to excessive temperature. On the other hand, copper enameled wire can usually withstand higher temperatures and is suitable for applications in some high-temperature environments. This is very important for coil elements that need to work under high temperature conditions. Copper enameled wire has high corrosion resistance and can resist the erosion of some chemical substances, thereby extending the service life of the coil element.

[0046] Furthermore, in the present embodiment, a receiving groove 43 is provided on the side of the end plate 4 facing away from the coil 2, and the metal terminal 5 is connected in the receiving groove 43 to improve the fixed connection relationship between the metal terminal 5 and the end plate 4, wherein the receiving groove 43 is connected and communicated with the functional inclined surface 41 to facilitate the overall processing of the magnetic core 1.

[0047] The second adhesive layer 7 is disposed in the receiving groove 43 , and the second adhesive layer 7 adheres and fixes the metal terminal 5 in the receiving groove 43 to ensure a stable connection between the metal terminal 5 and the terminal plate 4 .

[0048] On the other hand, based on the structural design in which the accommodating groove 43 is connected and communicated with the functional inclined surface 41, the second adhesive layer 7 can also extend into the functional inclined surface 41, thereby improving the fixed connection between the first functional pin 51 and the end plate 4, and the metal lead body 21 and the end plate 4, thereby ensuring the structural reliability of the coil element as a whole and optimizing the performance of the coil element.

[0049] Similarly, the second adhesive layer 7 can also extend to the outer surface of the functional platform 42 , thereby improving the fixed connection relationship between the second functional pin 52 and the terminal plate 4 .

[0050] The metal lead bodies 21 of the present embodiment are correspondingly led out from both ends of the wire 22. Taking the coil 2 stacked with two wires 22 as an example, the coil 2 at the same end can correspond to two metal lead bodies 21 of different layers. These two metal lead bodies 21 can be connected to the welding part 53 through the functional inclined surface 41 respectively, so as to facilitate the welding fixation in the subsequent process and the construction of the coil loop.

[0051] It can be understood that the metal terminals 5 on the end plate 4 are relatively arranged and maintained at a certain interval to avoid accidental contact between adjacent metal terminals 5, and the coil 2 is wound according to a preset rule. The preset rule here can be to select several coils 2 with the same winding direction, or to adopt an alternating direction design to reduce leakage inductance; or to specify the number of layers of the coil 2, the winding density of the coil 2, and the wire material used for the coil 2.

[0052] Among them, the integrally connected middle column 11 and the end pole plate 4 can form an I-shaped structure or a drum-shaped structure, and the part of the end pole plate 4 protruding from the middle column 11 constitutes a side leg wall 8. The height of the side leg wall 8 relative to the middle column 11 is greater than the height of the coil 2 relative to the middle column 11, so as to facilitate the winding of the coil 2 and also facilitate the construction of a closed magnetic circuit between the magnetic cover plate 3 and the magnetic core 1.

[0053] Furthermore, the second functional foot 52 of the present embodiment can be extended to be flush with the side leg wall 8. Based on the structural design of the side leg wall 8, the coil element of the present embodiment can prevent magnetic field loss and reduce magnetic leakage of the magnetic core 1, thereby reducing the impact on surrounding electromagnetic sensitive devices during actual work, thereby improving the comprehensive performance of the coil element.

[0054] The magnetic core 1 and the magnetic cover plate 3 of this embodiment are both made of magnetic materials, and the magnetic materials here may include one or more of ferrite materials, magnetic metal alloy materials, iron-silicon alloy materials or soft magnetic materials to meet the working requirements of the magnetic device.

[0055] The center column 11 of this embodiment can be designed as a rectangular structure to facilitate the stacking of the coil 2, that is, to provide more winding space, and the edges and corners of the rectangular body can also be used to adjust the magnetic field distribution of the magnetic device, which helps to optimize the performance of the inductor device and is easier to process and manufacture in the production process.

[0056] In summary, the present embodiment discloses a coil element, wherein a coil 2 composed of at least one wire 22 is wound on the middle column 11 of the magnetic core 1, each wire 22 has a metal lead body 21, and metal terminals 5 are provided on the end plates 4 at both ends of the middle column 11, and the metal terminals 5 are arranged opposite to each other and are arranged at a certain interval on the side of the end plate 4 away from the middle column 11, and one side of the metal terminal 5 is connected to a first functional pin 51, wherein functional inclined surfaces 41 are symmetrically provided on the side of the end plate 4, the functional inclined surfaces 41 are inclined toward the middle column 11 and have a preset inclination angle with the first direction, the first functional pin 51 is configured to fit on the functional inclined surfaces 41, and the winding lead joint 21 corresponds to the first functional pin 51 one by one and is electrically connected to the first functional pin 51 through the functional inclined surfaces 41, thereby improving the structural reliability of the coil element and optimizing the comprehensive performance of the coil element.

[0057] The above is a detailed introduction to the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A coil element, characterized in that: A coil comprising a magnetic core, a metal terminal and at least one conducting wire, wherein the magnetic core comprises a middle column and an end plate connected to both ends of the middle column, the coil is wound on the middle column according to a preset rule, each conducting wire has a metal lead body, the side of the end plate away from the middle column is connected to the metal terminals which are arranged opposite to each other and maintain a certain interval, one side of the metal terminal is integrally connected with a first functional pin, the side of the end plate is symmetrically provided with functional inclined planes, the functional inclined planes are inclined toward the middle column and have a preset inclination angle with the first direction, the first functional pin is attached to the functional inclined plane, the metal lead body corresponds to the first functional pin one by one and is electrically connected to the first functional pin through the functional inclined plane.

2. The coil component according to claim 1, wherein: The preset inclination angle ranges from 5 to 80 degrees.

3. The coil component according to claim 1, wherein: It also includes a magnetic cover plate, which is arranged on one side of the magnetic core and is respectively connected to the end plates.

4. The coil component according to claim 3, characterized in that A first adhesive layer is provided on one side of the magnetic cover plate facing the end plate, and the first adhesive layer respectively adheres and fixes the magnetic cover plate and the magnetic core.

5. The coil component according to claim 3, characterized in that A functional platform is integrally connected to one side of the end plate away from the magnetic cover plate, and the functional platform protrudes from the functional inclined surface. A second functional foot is symmetrically connected to one side of the metal terminal, and the second functional foot is buckled on the functional platform and protrudes from the outer surface of the end plate.

6. The coil component according to claim 5, characterized in that A certain distance is maintained between the symmetrically arranged second functional pins, and the symmetrically arranged second functional pins on the same end plate are located between the symmetrically arranged functional inclined surfaces.

7. The coil component according to claim 1, wherein: A welding portion is provided on the first functional pin, the metal lead body is electrically connected to the welding portion to form an electrode, and the welding portion is inclined toward the coil following the functional inclined surface.

8. The coil component according to claim 1, wherein: A receiving groove is provided on a side of the end plate away from the coil, the metal terminal is connected in the receiving groove, and the receiving groove is connected and communicated with the functional inclined surface.

9. The coil component according to claim 8, wherein: A second adhesive layer is provided in the receiving groove, and the second adhesive layer is used to bond and fix the metal terminal in the receiving groove.

10. The coil component according to any one of claims 1 to 9, characterized in that: The central column and the end plate connected in one piece form an I-shaped structure or a drum-shaped structure, and the portion of the end plate protruding from the central column forms a side leg wall, and the height of the side leg wall relative to the central column is greater than the height of the coil relative to the central column.

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