Surface-mounted terminal and magnetic device

Abstract

The utility model provides a surface-mounted terminal and a magnetic device. The surface-mounted terminal comprises at least one main body part; a wiring part; the external connection part is arranged at one end of one main body part and can be exposed and attached to the bottom of the magnetic device so as to be electrically connected with the circuit board in a patch mode; the extension part comprises a first part and a second part, the first part and the external connection part are arranged on the same layer, the first part comprises a first sub-part and a second sub-part which are sequentially connected between the external connection part and the second part, and the thickness of the first sub-part is larger than that of the second sub-part; the second part is perpendicular to the second sub-part, the thickness of the second part and the thickness of the second sub-part are both smaller than the thickness of the external connection part or the thickness of the first sub-part, and the second part extends in the extending direction of the main body part, is perpendicular to the main body part and can be exposed and attached to the side of the magnetic device. On the basis, SMT soldering tin can be exposed out of the extension part in the vertical direction, and vertical AOI detection and judgment are facilitated.

Description

Technical Field

[0001] This application relates to the field of magnetic devices, specifically to a surface mount terminal and a magnetic device. Background Technology

[0002] With the rapid development of technology, especially the emergence of multifunctional devices, the demand for passive components is increasing. Magnetic components, as one type of passive element, have been widely used. Magnetic components include at least a magnet, windings, and terminals (also known as "external terminals" or "external electrodes"). The terminals mainly serve two functions: first, as wiring parts, they are electrically connected to the leads of the windings; second, as surface mount electrodes, they are electrically connected to the circuit board (e.g., PCB, or Printed Circuit Board) using SMT (Surface Mount Technology).

[0003] Achieving high-quality solder joints through surface mount technology (SMT) is crucial for the performance and reliability of electronic products. Currently, vertical AOI (Automated Optical Inspection) technology is widely used to inspect solder joints for defects. The principle is to acquire and analyze images of the inspection location using optical technology while observing vertically downwards along a line of sight parallel to the side of the magnetic component. However, current surface mount electrodes are typically formed by directly bending conductors of uniform thickness (also known as "thick conductors"). Furthermore, after bending, these thick conductors create exposed side electrodes on the magnetic component. The bottom surface of the surface mount electrode used for SMT and the side surface of these side electrodes form an outer rounded corner. Therefore, after electrically connecting the magnetic component to the circuit board, most of the solder between the surface mount electrode and the circuit board (referred to as "SMT solder") is located at the bottom and outer rounded corners of the magnetic component, making it difficult for the solder to overflow. Ultimately, it is blocked by the magnetic component, making it difficult to acquire satisfactory SMT solder images using vertical AOI technology, which is detrimental to vertical AOI inspection and judgment. Utility Model Content

[0004] In view of this, this application provides a surface-mount terminal and a magnetic device, which can improve the problem that SMT solder is not conducive to vertical AOI inspection and judgment.

[0005] This application provides a surface mount terminal, comprising:

[0006] At least one main body may extend into the interior of the magnetic device;

[0007] A wiring section is provided at one end of one of the main bodies for electrical connection with the leads of a magnetic device;

[0008] An external part is provided at one end of one of the main parts and can be exposed and attached to the bottom of the magnetic device for electrical connection with the circuit board by means of surface mount.

[0009] The extension includes a first part and a second part. The first part is disposed on the same layer as the external part. The first part includes a first sub-part and a second sub-part, which are sequentially connected between the external part and the second part. The thickness of the first sub-part is greater than the thickness of the second sub-part. The second part is perpendicular to the second sub-part, and the thickness of the second part and the thickness of the second sub-part are both less than the thickness of the external part or the first sub-part. The second part extends along the extension direction of the main body and is perpendicular to the main body, and can be exposed and attached to the side of the magnetic device.

[0010] Optionally, the thickness of the second part is equal to the thickness of the second sub-part.

[0011] Optionally, the thickness of the first sub-part is equal to the thickness of the outer part.

[0012] Optionally, at least one of the following must be satisfied:

[0013] The thickness of the second part is E1, which satisfies E1≤0.2mm;

[0014] The thickness of the second sub-part is E2, which satisfies E2≤0.2mm;

[0015] The connection between the second part and the second sub-part is rounded, and the outer radius of the rounded corner is R, which satisfies R≤0.5mm.

[0016] Optionally, along the direction from the outer portion to the second portion, the width of the second sub-part is F, satisfying F≥0.1mm.

[0017] Optionally, along a direction perpendicular to the main body and parallel to the outer portion, the widths of the first portion and the second portion are equal to the width of the outer portion.

[0018] Optionally, the patch terminal includes a first main body and a second main body disposed opposite to each other; the external part is disposed at a first end of the first main body and a first end of the second main body, and is perpendicular to the extension direction of both the first main body and the second main body; the external part connects the first main body and the second main body, and the second part is disposed opposite to both the first main body and the second main body.

[0019] Optionally, the wiring portion is disposed at the second end of the first main body portion; the height of the first main body portion is greater than the height of the second main body portion, so that the wiring portion can be exposed to the magnetic device, and the second end of the second main body portion is not exposed to the magnetic device.

[0020] Optionally, the wiring portion is also disposed at the first end of one of the first main body portion and the second main body portion, and along the extending direction, the wiring portion is located between the external portion and the second end of the first main body portion.

[0021] This application provides a magnetic device including a magnet, a housing, a winding, and a surface mount terminal as described in any of the preceding claims. The winding is wound around the magnet, the main body of the surface mount terminal extends into the housing, the terminal block of the surface mount terminal is electrically connected to the lead wire of the winding, the outer portion of the surface mount terminal is exposed and attached to the bottom of the housing for electrical connection with a circuit board via a surface mount method, and a second portion of the extension of the surface mount terminal is exposed and attached to the side of the magnetic device.

[0022] As described above, in the surface mount terminal and magnetic device of this application, the extension of the surface mount terminal includes a first part and a second part. The first part includes a first sub-part and a second sub-part, which are sequentially connected between the external part and the second part. The thickness of the second part and the thickness of the second sub-part are both less than the thickness of the external part or the first sub-part. Since the second part extends through the external part and the first part to the side that can be exposed and attached to the magnetic device, it is equivalent to the surface mount electrode reaching the outermost side of the housing of the magnetic device. Furthermore, the thickness of the second part is small, so the SMT solder that enables the surface mount electrode to be electrically connected to the circuit board can be exposed in the extension in the vertical direction, which is beneficial for vertical AOI inspection and judgment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a surface-mount terminal according to the first embodiment of this application;

[0024] Figure 2 yes Figure 1 Side view of the surface mount terminal shown;

[0025] Figure 3 This is a schematic diagram of the structure of the magnetic device and circuit board assembled according to the first embodiment of this application;

[0026] Figure 4 yes Figure 3 The diagram shown is an exploded view of the magnetic device.

[0027] Figure 5 This is a schematic diagram of the structure of a surface-mount terminal according to the second embodiment of this application;

[0028] Figure 6 yes Figure 5 Side view of the surface mount terminal shown;

[0029] Figure 7 This is a schematic diagram of the structure of a magnetic device according to the second embodiment of this application;

[0030] Figure 8 yes Figure 7 The diagram shows the structure after the magnetic device is electrically connected to the circuit board.

[0031] First direction x, second direction y, third direction;

[0032] Magnetic device 100, magnet / magnetic ring 1, winding 2, surface mount terminal / terminal 3, housing 4, lead wire 20, insulating partition 5, protective sheet 6; first terminal 3a, second terminal 3b, pre-positioning 30, main body 31, wiring part 32, external part 33, protrusion 311, first main body 312, second main body 313, extension part 34, solder 340, first part 341, second part 342, first sub-part 3411, second sub-part 3412, first wire clamping branch 326, second wire clamping branch 327; mounting hole 41, wire outlet groove 42, wire protection groove 43, support 44, connector 45, top wall 401, colloid 402, table surface 440, circuit board 200. Detailed Implementation

[0033] To address the aforementioned technical problems in the prior art, the extension of the surface mount terminal (hereinafter referred to as "terminal") of this application includes a first part and a second part. The first part includes a first sub-part and a second sub-part, which are sequentially connected between the external part and the second part. The thickness of the second part and the thickness of the second sub-part are both less than the thickness of the external part or the first sub-part. Since the second part extends through the external part and the first part to the side that can be exposed and attached to the magnetic device, it is equivalent to the surface mount electrode reaching the outermost part of the housing of the magnetic device. Furthermore, the thickness of the second part is relatively small. Therefore, the SMT solder that enables the surface mount electrode to be electrically connected to the circuit board in the vertical direction can be exposed in the extension, which is beneficial for vertical AOI inspection and judgment.

[0034] The specific form of the shape, quantity, size, and other parameters of any of the surface mount terminals, main body, wiring part, external part, magnetic device, magnet, winding, and extension part can be determined according to the adaptability required by the actual scenario, and this application does not limit it.

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described below are only a part of the embodiments of this application, and not all of them. Unless otherwise specified, the following embodiments and their technical features can be combined with each other, and also belong to the technical solutions of this application.

[0036] In the description of the embodiments of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solutions of the corresponding embodiments, and are not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application.

[0037] First Embodiment

[0038] See also Figure 1 and Figure 2 This application illustrates a surface-mount terminal (which may be simply referred to as a "terminal" or "external terminal") 3. A single terminal 3 includes two main body portions 31, a wiring portion 32, an external connection portion 33, and an extension portion 34. The two main body portions 31 are respectively referred to as the first main body portion 312 and the second main body portion 313, and are arranged opposite each other along the third direction z in the figure, with potentially different heights. This terminal 3 is suitable for applications such as... Figure 3 and Figure 4 The magnetic device 100 shown is used for electrical connection with the circuit board 200. The structure and assembly design of the terminal 3 are described below in conjunction with the magnetic device 100.

[0039] An external connection portion 33 is disposed at the first end (i.e., the lower end or bottom end) of the first main body portion 312 and the first end (i.e., the lower end or bottom end) of the second main body portion 313, and is perpendicular to both the extension direction (i.e., the second direction y) of the first main body portion 312 and the extension direction of the second main body portion 313, thereby connecting the first end of the first main body portion 312 and the first end of the second main body portion 313. The external connection portion 33 can be exposed and attached to the bottom of the magnetic device 100. In this embodiment, the magnetic device 100 is equivalent to a surface mount magnetic device 100. The external connection portion 33 can be regarded as part of the surface mount electrode or surface mount pin of the magnetic device 100, so as to make electrical connection with the circuit board 200 by surface mount method (e.g., SMT).

[0040] The wiring portion 32 is located at the second end of the first main body portion 312, i.e., the upper end or the top end.

[0041] One end of the extension 34 is located on one side of the external portion 33, and after the extension 34 is bent, its other end faces the second end of the first main body portion 312 along the second direction y. Figure 1 and Figure 2 As shown, the extension 34 includes a first part 341 and a second part 342. The first part 341 is disposed on the same layer as the outer part 33, and the second part 342 is disposed opposite to the first main body part 312 and the second main body part 313 along the first direction x. The first part 341 includes a first sub-part 3411 and a second sub-part 3412, and the first sub-part 3411 and the second sub-part 3412 are sequentially connected between the external part 33 and the second part 342. The thickness of the first sub-part 3411 is greater than the thickness of the second sub-part 3412. Optionally, the thickness of the second part 342 is equal to the thickness of the second sub-part 3412, and the thickness of the first sub-part 3411 is equal to the thickness of the external part 33. The second part 342 is perpendicular to the second sub-part 3412, and the thickness of the second part 342 and the thickness of the second sub-part 3412 are both less than the thickness of the external part 33 and also less than the thickness of the first sub-part 3411. The second part 342 extends along the extension direction of the main body 31 and is perpendicular to the main body 31, and can be exposed and attached to the side of the magnetic device 100.

[0042] The magnetic device 100 includes a magnet 1, a winding 2, several terminals 3, and a housing 4. The number of terminals 3 provided in this application can be determined according to the type of magnetic device 100; for example... Figures 3 to 5 The magnetic device 100 shown may be provided with four terminals 3.

[0043] For ease of description and understanding, combined with Figures 1 to 4 In the orientation shown, the width direction of the magnetic device 100 is referred to as the first direction x, the height direction as the second direction y, and the thickness direction as the third direction z. The first direction x, the second direction y, and the third direction z are all perpendicular to each other and can be regarded as the three coordinate axes of a three-dimensional rectangular coordinate system. It should be understood that the term "perpendicular" throughout this application does not require that the angle between the two directions must be 90°, but allows for deviations of, for example, ±10°. That is, "perpendicular" can be understood as the angle between any two directions being 80° to 100°. Similarly, the term "parallel" throughout this application does not require that the angle between the two directions be 0° or 180°, but allows for deviations of, for example, ±10°. That is, "parallel" can be understood as the angle between any two directions being 0° to 10° or 170° to 190°.

[0044] Magnet 1 can be a ring-shaped magnetic component with a circular cross-section (xz), referred to as magnetic ring 1, made of a soft magnetic material conventional in the art, and the surface of magnet 1 is covered with an insulating layer. The magnet 1 illustrated in this application is only an exemplary illustration; other examples may also be octagonal or other polygonal shapes.

[0045] Winding 2 may include two coils, each coil being formed, for example, by leads 20 of the type enameled wire. The leads 20 of each coil are wound turn by turn onto the magnetic ring 1, the winding method depending on the specific application. After winding, the two coils are positioned opposite each other along a first direction x. "Relatively positioned" means that the two coils are not in contact, i.e., they have a non-zero distance between them. The ends of the leads 20 may extend beyond the magnetic ring 1 and be electrically connected to corresponding terminals 3, for example, by soldering. Figures 3 to 5 In the example, the winding 2 is provided with four lead wire 20 ends, and the magnetic device 100 is provided with four terminals 3. These four terminals 3 have different shapes. For ease of description, the two identical ones can be referred to as first terminals 3a, and the other two identical ones as second terminals 3b. The structures of the first terminals 3a and the second terminals 3b can be arranged symmetrically. The two lead wire 20 ends are respectively welded to the two second terminals 3b in a one-to-one correspondence. The remaining two lead wire 20 ends are respectively welded to the two first terminals 3a in a one-to-one correspondence.

[0046] like Figure 4 As shown, an insulating partition 5, made of insulating material, can be provided between the two coils to separate them and prevent interference. Of course, when the distance between the two coils is large enough, the magnetic device 100 may not require the insulating partition 5.

[0047] The housing 4 can be made of plastic and is provided with a receiving cavity, a mounting hole 41, a wire outlet groove 42, and a wire protection groove 43. The top of the receiving cavity is closed and serves as the top wall 401 of the housing 4. The bottom of the receiving cavity is open and has an opening to serve as part of the bottom of the housing 4 for mounting and exposing the winding 2. In addition, a support platform 44 is provided on the periphery of the receiving cavity and near the top wall 401. The mounting hole 41 is a through hole that penetrates the support platform 44 along the second direction y. The xz cross-sectional shape of the mounting hole 41 is adapted to the xz cross-sectional shape of the corresponding terminal 3. For example, a serrated structure can be provided in the mounting hole 41 to adapt to the protrusions 311 of each terminal 3.

[0048] Each main body portion 31 can be inserted into the corresponding mounting hole 41 of the housing 4 along the second direction y. In other examples, the housing 4 can be formed by injection molding to enclose each main body portion 31. Of course, other methods or structures can also be used in this application to achieve that each main body portion 31 extends into the housing 4 along the second direction y. In addition, the height of the first main body portion 312 can be greater than the height of the second main body portion 313, where height refers to the length along the second direction y, so that the wiring portion 32 can be exposed outside the housing 4 of the magnetic device 100, while the second end of the second main body portion 313 is not exposed outside the housing 4 of the magnetic device 100.

[0049] After the winding 2 and the magnet 1 are assembled, they are installed in the receiving cavity through the opening at the bottom of the housing 4. A glue 402 can be provided on one side of the receiving cavity corresponding to the top wall 401. This glue 402 bonds and fixes the two coils of the winding 2 and the insulating partition 5 into the receiving cavity of the housing 4. In one example, the magnetic device 100 can have a protective sheet 6 at the bottom of the receiving cavity, made of insulating material, and placed on the surface of the winding 2 coil facing the external connection 33 to fully shield the winding 2 coil and improve the defect of poor insulation withstand voltage caused by solder splattering onto the coil body during soldering of the external connection 33 to the circuit board.

[0050] Each lead 20 end of the winding 2 coil extends from the corresponding lead slot 42 to the outside of the housing 4, and extends along the wire protection slot 43 on the outside of the housing 4 to the platform 440 of the support 44, so as to connect with the wiring portion 32 of the corresponding main body 31. The connection between the lead 20 end and the wiring portion 32 can be wrapped by a bonding agent 45 such as solder. The platform 440 of the support 44 is lower than the top wall 401 of the housing 4, so that the top of each main body 31 after being wound with the lead 20 end is also lower than the top wall 401 of the housing 4. Finally, the connection between the lead 20 end and the wiring portion 32 is also lower than the top wall 401 of the housing 4, reducing the risk of the connection being affected by external impact, thereby improving the stability of the electrical connection.

[0051] Based on the above, the first part 341 and the external part 33 of the extension 34 can be equivalent to the patch electrode of the magnetic device 100, and can be electrically connected to the circuit board 200 by means of patching. Since the second part 342 of the extension 34 extends through the external part 33 and the first part 341 to the side that can be exposed and attached to the magnetic device 100, it is equivalent to the surface mount electrode reaching the outermost side of the housing of the magnetic device 100. And the thickness of the second part 342 is small. Therefore, when the external part 33 is soldered to the circuit board 200 to perform SMT mounting, the solder 340 used for soldering will produce a solder crawling phenomenon. That is, the solder will overflow towards the extension 34 and adhere to the outer surface of the extension 34. Therefore, the solder 340 after final curing will be exposed in the extension 34 of each terminal 3. When using AOI technology, the AOI equipment can acquire the solder 340 image along the direction of gravity (i.e., the opposite direction of the second direction y), which is beneficial for vertical AOI inspection and judgment to determine whether the soldering quality is qualified, and realize effective monitoring of SMT quality.

[0052] In addition, the thickness of the second part 342 and the thickness of the second sub-part 3412 are both small, which not only makes it easier for the second part 342 to be bent relative to the second sub-part 3412, but also forms a gap between the connection between the two parts and the first sub-part 3411. The housing 4 of the magnetic device 100 can be stably connected with the gap, so as to facilitate the stable assembly of the terminal 3 and the housing 4 at the bottom of the magnetic device 100.

[0053] In one example, the widths of the extension 34 and the outer portion 33 can be equal. That is, the widths of the first portion 341 (including the first sub-portion 3411 and the second sub-portion 3412) and the second portion 342 can be equal to the width of the outer portion 33. The width refers to the length along a direction perpendicular to the main body 31 and parallel to the outer portion 33 (i.e., along the third direction z). Therefore, when the extension 34 and the outer portion 33 are in an unbent sheet structure, this sheet structure can be conductive strips of equal width but different thicknesses. These conductive strips are easily bent at the thinner second sub-portion 3412 to form the illustrated structure.

[0054] In one example, the extension 34 satisfies at least one of the following:

[0055] The thickness of the second part 342 is E1, which satisfies E1≤0.2mm;

[0056] The thickness of the second sub-part 3412 is E2, which satisfies E2≤0.2mm;

[0057] The connection between the second part 342 and the second sub-part 3412 is rounded, and the outer radius of the rounded corner is R, which satisfies R≤0.5mm, preferably R≤0.25mm.

[0058] Along the direction from the outer portion 33 to the second portion 342, that is, along the direction parallel to the first direction x, the width of the second sub-part 342 is F, which satisfies F≥0.1mm.

[0059] Based on the aforementioned threshold range, this example ensures that the terminal 3 is conducive to vertical AOI detection and assembly with the housing 4, while also guaranteeing that the extension 34 has high structural strength.

[0060] At the junction of the wiring portion 32 and the main body portion 31, each terminal 3 can form a pre-position 30 with a smaller width, for example... Figures 1 to 4 As shown, a predetermined position 30 is formed at the junction of the wiring portion 32 and the first main body portion 312. The end of the lead wire 20 is wound around the predetermined position 30 to electrically connect the coil of the winding 2 to the corresponding terminal 3. It should be understood that this application does not limit the way in which the end of the lead wire 20 is electrically connected to the wiring portion 32. Accordingly, the specific structure of the wiring portion 32 can be adapted according to actual needs.

[0061] Each main body 31 can be a strip-shaped sheet-like conductive element, or other adaptive structure, for example... Figure 1 and Figure 2 As shown, a spike 311 can be provided. Along the direction of insertion into the housing 4, the spike 311 has an acute angle α which facilitates the insertion of the terminal 3 into the housing 4, making installation convenient. The anti-dislodgement angle β of the spike 311 can cooperate with the housing 4, so that the housing 4 applies a force to the spike 311 at least in the opposite direction to the insertion direction, so as to prevent the terminal 3 from moving in the opposite direction of the insertion direction, avoid the terminal 3 from loosening relative to the magnet 1 and the housing 4, thereby reducing the risk of electrical connection failure between the terminal 3 and the lead 20 and the circuit board.

[0062] In this embodiment, both main body portions 31 are provided with protrusions 311, which improves the stability of the fit between the terminal 3 and the housing 4, reduces the risk of loosening in the magnetic device 100, and lowers the risk of electrical connection failure. In other examples, the protrusions 311 may be provided on only one of the main body portions 31, or the protrusions 311 may be provided on only one side of any main body portion 31.

[0063] Second Embodiment

[0064] This application uses the same reference numerals to identify structural elements with the same name. Based on the description of the first embodiment above, the difference lies in the combination of… Figures 5 to 8As shown, in each of the surface-mount terminals 3 in this second embodiment, a wiring portion 32 is also provided at the first end of the first main body portion 312 and the first end of the second main body portion 313. This wiring portion 32 and the external connection portion 33 are arranged side by side between the first main body portion 312 and the second main body portion 313. Along the second direction y, the wiring portion 32 is located between the external connection portion 33 and the second end of the first main body portion 312 (or the second main body portion 313), that is, in the insertion direction or the second direction y, the wiring portion 32 and the external connection portion 33 are arranged with a height difference.

[0065] like Figure 5 and Figure 6 As shown, the wiring portion 32 includes a first wire clamping branch 326 and a second wire clamping branch 327. The end of the lead wire 20 extends out of the receiving cavity through the bottom of the housing 4 and is finally clamped and fixed by the first wire clamping branch 326 and the second wire clamping branch 327 to realize the electrical connection between the end of the lead wire 20 and the external connector 33. The main body portion 31 of each terminal 3 is inserted into the housing 4 from the bottom of the housing 4 along the second direction y, so that the external connector 33 is exposed and attached to the bottom of the magnetic device 100. Optionally, the end of the main body portion 31 of each terminal 3 away from the external connector 33 (i.e., the second end or the top end) can be provided with a chamfer θ as described above. The second ends of the first main body portion 312 and the second main body portion 313 may not extend outside the housing 4 of the magnetic device 100, but may be exposed or not exposed on the platform surface 440 of the support 44.

[0066] Each terminal 3 in this embodiment is also provided with an extension 34, which can have the same structure as the first embodiment described above, and thus can also produce the aforementioned beneficial effects.

[0067] This embodiment differs in structure from the magnetic device 100 in the first embodiment described above, but this is not within the scope of protection of the inventive concept of the patch terminal 3 in this application, and therefore will not be described in detail.

[0068] This application also provides a magnetic device, including a magnet, a housing, a winding, and a patch terminal 3 as described in any of the above embodiments. Therefore, it possesses the beneficial effects that the patch terminal 3 of the corresponding embodiments can produce, which will not be elaborated further here. The winding 2 is wound around the magnet 1. The main body 31 of the patch terminal 3 extends into the housing 4. The wiring portion 32 of the patch terminal 3 is electrically connected to the lead wire 20 of the winding 2. The external portion 33 of the patch terminal 3 is electrically connected to the circuit board. The second portion 342 of the extension portion 34 of the patch terminal 3 is exposed and attached to the side of the magnetic device 100. The structural design and mutual cooperation between these structural elements can be found in the aforementioned corresponding embodiments.

[0069] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. For those skilled in the art, any equivalent structural transformations made using the content of this specification and drawings are similarly included within the patent protection scope of this application.

[0070] Although this document uses terms such as "first," "second," etc., to describe various types of information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. Furthermore, the singular forms "a," "an," and "the" are intended to also include the plural forms. The terms "or" and "and / or" are interpreted as inclusive, or meaning either one or any combination thereof. Exceptions to this definition only arise when combinations of elements, functions, steps, or operations are inherently mutually exclusive in some way.

Claims

1. A patch terminal characterized by, The patch terminal comprises: at least one main body part, which is extendable into the interior of the magnetic device; a wiring part, which is arranged at one end of one of the main body parts and is used for electrical connection with the lead of the magnetic device; an external connection part, which is arranged at one end of one of the main body parts and is exposed to be attached to the bottom of the magnetic device to be electrically connected to the circuit board in a patch manner; an extension part, which comprises a first part and a second part, the first part is arranged in the same layer as the external connection part, the first part comprises a first sub-part and a second sub-part, and is sequentially connected between the external connection part and the second part, the thickness of the first sub-part is greater than the thickness of the second sub-part; the second part is perpendicular to the second sub-part, and the thickness of the second part and the thickness of the second sub-part are both less than the thickness of the external connection part or the first sub-part, the second part extends along the extension direction of the main body part and is perpendicular to the main body part, and is exposed to be attached to the side of the magnetic device.

2. The patch terminal according to claim 1, characterized by The thickness of the second part is equal to the thickness of the second sub-part.

3. The patch terminal according to claim 1, characterized by The thickness of the first sub-part is equal to the thickness of the external connection part.

4. The patch terminal of claim 1, wherein At least one of the following conditions is met: The thickness of the second part is E1, which satisfies E1≤0.2mm; The thickness of the second sub-part is E2, which satisfies E2≤0.2mm; The connection between the second part and the second sub-part is a round corner, and the outer corner radius of the round corner is R, which satisfies R≤0.5mm.

5. The patch terminal of claim 1, wherein Along the direction from the external connection part to the second part, the width of the second sub-part is F, which satisfies F≥0.1mm.

6. The patch terminal of claim 1, wherein Along the direction perpendicular to the main body part and parallel to the external connection part, the width of the first part and the second part is equal to the width of the external connection part.

7. The patch terminal according to any one of claims 1 to 6, characterized by, The patch terminal comprises oppositely arranged first and second main body parts; the external connection part is arranged at the first ends of the first and second main body parts and is perpendicular to the extension directions of the first and second main body parts; the external connection part connects the first and second main body parts, and the second part is oppositely arranged with the first and second main body parts.

8. The patch terminal according to claim 7, characterized by The wiring part is arranged at the second end of the first main body part. The height of the first main body part is greater than the height of the second main body part, so that the wiring part is exposed to the magnetic device, and the second end of the second main body part is not exposed to the magnetic device.

9. The patch terminal of claim 7, wherein, The wiring part is also arranged at the first end of one of the first and second main body parts, and along the extension direction, the wiring part is located between the external connection part and the second end of the first main body part.

10. A magnetic device, characterized by, The patch terminal comprises a magnet, a shell, a winding, and a patch terminal as claimed in any one of claims 1 to 9, the winding is wound around the magnet, the main body part of the patch terminal extends into the shell, the wiring part of the patch terminal is electrically connected with the lead of the winding, the external connection part of the patch terminal is exposed to be attached to the bottom of the shell to be electrically connected to the circuit board in a patch manner, and the second part of the extension part of the patch terminal is exposed to be attached to the side of the magnetic device.

Images