Welding structure and coil element

Abstract

The invention provides a welding structure and a coil element. The welding structure comprises a conductive seat, a wire and a welding part. The conductive seat comprises a first limiting piece and a second limiting piece, and the second limiting piece and the first limiting piece are arranged in a spaced mode. The wire comprises a conductive part and an insulating layer wrapping the conductive part, the conductive part comprises an exposed part exposed by the insulating layer, the wire penetrates through the first limiting piece, the exposed part is located between the first limiting piece and the second limiting piece, and one end of the wire is clamped by the second limiting piece. The welding part at least partially covers the exposure part, the first limiting piece and the second limiting piece, so that the wire is electrically connected with the conductive seat.

Description

Technical Field

[0001] The present invention relates to an electronic device and an electronic equipment, and particularly to an electronic device conducive to improving space utilization rate and an electronic equipment including such an electronic device. Background Art

[0002] Soldering is a process of using solder to connect two metal surfaces. During the soldering process, solder can be placed on the two metal surfaces to be connected and heated to melt the solder. After the melted solder cools and solidifies, solder joints can be formed to connect the two metal surfaces. Soldering is widely used in the electronics industry. For example, soldering can be used to connect wires in a circuit, connect electronic components to a printed circuit board (PCB), etc.

[0003] However, a general soldering structure has relatively weak structural strength at the solder joints. For example, when using soldering to connect a wire to a metal surface, the wire may be damaged during the process of removing the insulating layer, or be subject to repeated pulling caused by thermal expansion and contraction of another component connected thereto, and thus is prone to breakage at or near the solder joint. Therefore, how to improve the soldering structure to enhance its reliability has become the goal of related industries. Summary of the Invention

[0004] The purpose of the present invention is to provide a soldering structure and a coil component to solve at least one of the above problems.

[0005] According to an embodiment of the present disclosure, a soldering structure is provided, which includes a conductive base, a wire, and a soldering part. The conductive base includes a first limiting member and a second limiting member, and the second limiting member is spaced apart from the first limiting member. The wire includes a conductive part and an insulating layer covering the conductive part. The conductive part includes an exposed part exposed from the insulating layer. The wire passes through the first limiting member, and the exposed part is located between the first limiting member and the second limiting member, and the second limiting member clamps one end of the wire. The soldering part at least partially covers the exposed part, the first limiting member, and the second limiting member, so that the wire is electrically connected to the conductive base.

[0006] According to another embodiment of the present disclosure, a coil component is provided, which includes a core member, a conductive base, a wire, and a soldering part. The conductive base is disposed on the core member, wherein the conductive base includes a first limiting member and a second limiting member spaced apart from the first limiting member. The wire is wound around the core member, wherein the wire includes a conductive part and an insulating layer covering the conductive part. The conductive part includes an exposed part exposed from the insulating layer. The wire passes through the first limiting member, and the exposed part is located between the first limiting member and the second limiting member, and the second limiting member clamps one end of the wire. The soldering part at least partially covers the exposed part, the first limiting member, and the second limiting member, so that the wire is electrically connected to the conductive base.

[0007] Compared with the prior art, in the present disclosure, the conductive base includes both the first limiting member and the second limiting member, which is conducive to restricting the exposed portion of the wire between the first limiting member and the second limiting member, thus helping to maintain the structural strength of the connecting portion of the wire adjacent to the first limiting member, and reducing the influence of external force on the electrical connection relationship between the welding portion and the exposed portion. In the present disclosure, the welding portion at least partially covers the exposed portion, the first limiting member, and the second limiting member, which can prevent the welding portion from shrinking towards a single-side limiting member, and is conducive to improving the coverage degree of the welding portion on the exposed portion. Therefore, the welding structure of the present disclosure can have improved reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 FIG. is a perspective view of a coil element according to an embodiment of the present disclosure.

[0009] Figure 2 is Figure 1 another perspective view of the coil element in FIG.

[0010] Figure 3 is Figure 1 a perspective view of the coil element in FIG. with the plate member omitted.

[0011] Figure 4 is Figure 3 a partially enlarged view of the coil element in FIG.

[0012] Figure 5 is Figure 1 a partially planar view of the coil element in FIG.

[0013] Figure 6 is Figure 5 a sectional view along the cutting line A-A' of the coil element in FIG.

[0014] Figure 7 FIG. is a partially side view of a coil element according to another embodiment of the present disclosure.

[0015] Figure 8 FIG. is a partially side view of a coil element according to yet another embodiment of the present disclosure.

[0016] The reference numerals are as follows:

[0017] 10, 10a, 10b: Coil element

[0018] 100: Core member

[0019] 110: Winding portion

[0020] 120: Flange portion

[0021] 121A: Inner surface

[0022] 121B: Outer surface

[0023] 122A, 122B, 123A, 123B: Side surfaces

[0024] 124: Groove

[0025] 130: Plate member

[0026] 200: Conductive seat

[0027] 210, 210a, 210b: First limiting member

[0028] 212, 212a, 212b: First extension

[0029] 214, 214a, 214b: First covering part

[0030] 2142: Arc segment

[0031] 2144: End segment

[0032] 216, 216a, 216b: First space

[0033] 220: Second limiting member

[0034] 222: Second extension

[0035] 224: Second covering part

[0036] 226: Second space

[0037] 230: Body

[0038] 231: First sheet

[0039] 232: Second sheet

[0040] 240: Space

[0041] 300: Conducting wire

[0042] 301: End

[0043] 310: Conductive part

[0044] 312: Exposed part

[0045] 320: Insulating layer

[0046] 400: Welding part

[0047] A1: Included angle

[0048] F: External force

[0049] P1: Middle part

[0050] P2: End part

[0051] P21: First sub - part

[0052] P22: Second sub - part

[0053] P23: Third sub - part

[0054] P3: Connecting part

[0055] SD1: First distance

[0056] SD2: Second distance

[0057] T11, T21: Ends

[0058] T12: Connecting end

[0059] X, Y, Z: Directions Detailed implementation manners

[0060] Regarding the foregoing and other technical contents, features and effects of the present disclosure, they will be clearly presented in the following detailed description of the preferred implementation manners with reference to the accompanying drawings. For the content of the present disclosure to be clearer and more understandable, the following drawings may be simplified schematic diagrams, and the elements therein may not be drawn to scale. Moreover, the number and size of each element in the drawings are only for illustration and do not limit the present disclosure. The directional terms mentioned in the following implementation manners, such as: up, down, left, right, front, back, bottom, top, etc., are only with reference to the directions in the drawings. Therefore, the directional terms used are for explanation and do not limit the present disclosure. In addition, in the following implementation manners, the same or similar elements will adopt the same or similar reference numerals.

[0061] The following description of "the first feature is formed on or above the second feature" may mean that "the first feature is in direct contact with the second feature", or it may mean that "there are other features between the first feature and the second feature", so that the first feature and the second feature are not in direct contact.

[0062] The present disclosure uses terms such as first and second to describe elements, regions, layers and / or sections, but it should be understood that these terms are only used to distinguish one element, region, layer and / or section from another element, region, layer and / or section. They do not imply and represent any previous ordinal number of the element itself, nor represent the arrangement order of one element and another element, or the order in the manufacturing method. Therefore, without departing from the scope of the specific implementation manners of the present disclosure, the first element, region, layer and / or section discussed below may also be referred to as the second element, region, layer and / or section. These terms in the claims may not be the same as those in the specification, and may be replaced by first, second, third... in accordance with the order of element declaration in the claims.

[0063] In the present disclosure, for ease of description, the following drawings are described in conjunction with the XYZ rectangular coordinate system.

[0064] Terms such as "electrically connected", "electrically contacted", or "coupled" in the present disclosure include any direct or indirect means of electrical connection.

[0065] It should be understood that in the following embodiments, without departing from the spirit of the present disclosure, the features in multiple different embodiments can be replaced, reorganized, and mixed to complete other embodiments. As long as the features between the embodiments do not violate the disclosure spirit or conflict with each other, they can be arbitrarily mixed and used.

[0066] Please refer to Figures 1 to 6 , Figure 1 which is a three-dimensional schematic diagram of the coil element 10 according to an embodiment of the present disclosure, Figure 2 is Figure 1 another three-dimensional schematic diagram of the coil element 10 in Figure 3 is Figure 1 a three-dimensional schematic diagram of the coil element 10 in Figure 4 is Figure 3 a partially enlarged view of the coil element 10 in Figure 1 wherein the welding portion 400 in Figure 5 is Figure 1 omitted to clearly show the connection relationship between the conductive base 200 and the wire 300, Figure 6 is Figure 5 a partially planar schematic diagram of the coil element 10 in

[0067] which mainly shows the connection relationship between the conductive base 200, the wire 300, and the welding portion 400. The coil element 10 includes a core member 100, a conductive base 200, a wire 300, and a welding portion 400. The coil element 10 can be applied as an inductive element, such as a common mode choke (CMC), but is not limited thereto.

[0068] Each flange portion 120 includes an inner surface 121A, an outer surface 121B, and side surfaces 122A, 122B, 123A, 123B connecting between the inner surface 121A and the outer surface 121B. The inner surface 121A and the outer surface 121B are disposed opposite to each other in the axial direction, the inner surface 121A faces the winding portion 110, and the outer surface 121B is away from the winding portion 110. The side surfaces 122A, 122B are disposed opposite to each other in a first direction perpendicular to the axial direction (herein the direction Y), the side surfaces 123A, 123B are disposed opposite to each other in a second direction perpendicular to the axial direction (herein the direction Z), and the first direction and the second direction can be perpendicular to each other. The two flange portions 120 can be integrally formed on the winding portion 110.

[0069] The material of the core member 100 can be a magnetically permeable material, such as ferrite. The coil element 10 may optionally further include a plate member 130 disposed along the axial direction on the side surface 123A of the two flange portions 120. Thus, the core member 100 and the plate member 130 can jointly form a closed magnetic circuit.

[0070] The wire 300 is wound around the core member 100. The wire 300 includes a conductive portion 310 and an insulating layer 320 covering the conductive portion 310. The material of the conductive portion 310 can include metals, such as copper, silver, aluminum, or a combination thereof. The material of the insulating layer 320 can include resins, such as polyurethane, polyester, polyamide-imide (PAI), or a combination thereof. In some embodiments, the wire 300 can be an enameled wire.

[0071] The number of the wires 300 is exemplified as two herein. The two wires 300 are magnetically coupled to each other but electrically insulated from each other. The middle portion P1 of each wire 300 is wound around the winding portion 110 of the core member 100, and the two end portions P2 of each wire 300 are respectively disposed on the outer surface 121B of the two flange portions 120, so that the coil element 10 is a four-terminal element. In some embodiments, the two wires 300 can be symmetrically wound around the winding portion 110, and the number of turns of the two wires 300 on the winding portion 110 can be the same. The flange portions 120 can respectively form grooves 124 on the side surfaces 122A, 122B for the wires 300 to be disposed. Thus, the wires 300 do not protrude from the side surfaces 122A, 122B of the flange portions 120, which is beneficial to reducing the overall volume of the coil element 10 and is beneficial to reducing the probability of interference between the coil element 10 and other elements when assembling the coil element 10.

[0072] The conductive base 200 is disposed on the core member 100. The conductive base 200 can serve as the end electrode of the coil element 10. The conductive base 200 can be, for example, a lead frame. The number of the conductive bases 200 can be elastically adjusted according to the number of the wires 300. Here, the number of the conductive bases 200 is four, and they are respectively used for electrically connecting to the four ends P2 of the two wires 300. Two of the four conductive bases 200 can be spaced apart and symmetrically disposed on one flange portion 120, and the other two of the four conductive bases 200 can be spaced apart and symmetrically disposed on the other flange portion 120.

[0073] The conductive base 200 can include a body 230, a first limiting member 210, and a second limiting member 220, and the body 230 is connected to the first limiting member 210 and the second limiting member 220. The first limiting member 210 and the second limiting member 220 can be integrally formed on the body 230. The body 230 can include a first sheet 231 and a second sheet 232. The first sheet 231 is disposed on the outer surface 121B, and the second sheet 232 is disposed on the side surface 123B. The second sheet 232 is bent relative to the first sheet 231. Here, the second sheet 232 is perpendicularly bent relative to the first sheet 231, but is not limited thereto. The shape of the body 230 can be elastically adjusted according to actual requirements. The coil element 10 can be electrically connected to other components, such as a printed circuit board (PCB), through the second sheet 232.

[0074] As Figures 4 to 6 shown, the second limiting member 220 and the first limiting member 210 are spaced apart. The conductive portion 310 includes an exposed portion 312 located at the end P2 of the wire 300. The exposed portion 312 is not covered by the insulating layer 320 and is exposed by the insulating layer 320. The wire 300 passes through the first limiting member 210. The exposed portion 312 is located between the first limiting member 210 and the second limiting member 220, and the second limiting member 220 clamps one end of the wire 300. The welding portion 400 at least partially covers the exposed portion 312, the first limiting member 210, and the second limiting member 220, so that the wire 300 is electrically connected to the conductive base 200. Thus, the wire 300 can be electrically connected to other components, such as a printed circuit board, through the conductive base 200.

[0075] Specifically, the end P2 of the wire 300 can include a first sub - portion P21, a second sub - portion P22, and a third sub - portion P23 (see Figure 6)。The first sub - portion P21 passes through the first limiting member 210, the third sub - portion P23 is clamped by the second limiting member 220, the second sub - portion P22 is located between the first sub - portion P21 and the third sub - portion P23, and the exposed portion 312 is located at the second sub - portion P22. The third sub - portion P23 may include the end 301 of the end portion P2 of the wire 300. Alternatively, among the first sub - portion P21, the second sub - portion P22, and the third sub - portion P23, the third sub - portion P23 is closest to the end 301 of the end portion P2. The foregoing "the third sub - portion P23 may include the end 301 of the end portion P2 of the wire 300" may mean that the end 301 of the wire 300 is clamped by the second limiting member 220, and the foregoing "the third sub - portion P23 is closest to the end 301 of the end portion P2" may mean that the end 301 is not clamped by the second limiting member 220 and is located on the side of the second limiting member 220 away from the second sub - portion P22. In other words, the foregoing "the second limiting member 220 clamps one end of the wire 300" may mean that the second limiting member 220 clamps the end 301 of the wire 300, or the second limiting member 220 clamps a portion adjacent to the end 301 of the wire 300. The wire 300 may further include a connecting portion P3 connected between the end portion P2 and the intermediate portion P1.

[0076] The first limiting member 210 may include a first extension portion 212 and a first covering portion 214. The first extension portion 212 extends from the body 230, and the first covering portion 214 extends from the first extension portion 212 toward the body 230. A first space 216 is defined between the first extension portion 212 and the first covering portion 214 of the first limiting member 210 for accommodating the first sub - portion P21 of the wire 300. In other words, the first sub - portion P21 may be covered by the first covering portion 214 and not be exposed. In this embodiment, the first extension portion 212 and the first covering portion 214 together form a clip structure, which can be used to clamp and fix the first sub - portion P21 of the wire 300. Thus, it can provide the effect of assisting the second limiting member 220 in clamping and fixing the wire 300, but is not limited thereto. In some embodiments, the first extension portion 212 and the first covering portion 214 may only provide the first space 216 to accommodate the first sub - portion P21 of the wire 300 without clamping the first sub - portion P21 of the wire 300. Regarding this part, reference may be made to Figure 7 and Figure 8 the relevant description. In other words, before forming the welding portion 400, mainly the second limiting member 220 is used to provide the effect of clamping and fixing the wire 300.

[0077] The second limiting member 220 may include a second extension portion 222 and a second covering portion 224. The second extension portion 222 extends from the body 230, and the second covering portion 224 extends from the second extension portion 222 toward the body 230. A second space 226 is defined between the second extension portion 222 and the second covering portion 224 of the second limiting member 220 for accommodating the third sub-portion P23 of the wire 300. In other words, the third sub-portion P23 can be covered by the second covering portion 224 and not exposed. The second extension portion 222 and the second covering portion 224 together form a clip structure, which can be used to clamp and fix the third sub-portion P23 of the wire 300. The second limiting member 220 is used to fix the wire 300 during the welding process.

[0078] When manufacturing the coil element 10, the wire 300 can be wound around the winding portion 110 first. Then, one end P2 of the wire 300 is passed through the groove 124 formed in the flange portion 120, and then the first sub-portion P21 of the wire 300 is passed through the first limiting member 210 and the third sub-portion P23 is clamped by the second limiting member 220. In this embodiment, the first sub-portion P21 is also clamped by the first limiting member 210.

[0079] After that, a laser paint stripping process can be performed to remove a part of the insulating layer 320 located on the second sub-portion P22 of the wire 300, that is, the part irradiated by the laser (not shown in the figure), so as to form an exposed portion 312. The exposed portion 312 is located between the first limiting member 210 and the second limiting member 220, and on the outer side (i.e., away from the flange portion 120) of the wire 300. Then a welding process can be performed to form the welding portion 400. For example, the exposed portion 312 can be covered with solder (not shown in the figure), and then the laser light welding process or the reflow soldering process is used to melt the solder, so that the melted solder can at least partially cover the exposed portion 312, the first limiting member 210, and the second limiting member 220. After the melted solder cools and solidifies, the welding portion 400 that at least partially covers the exposed portion 312, the first limiting member 210, and the second limiting member 220 can be obtained. According to an embodiment of the present invention, the solder may include tin, that is, the material of the welding portion 400 may include tin.

[0080] As Figure 5 and Figure 6 shown, the welding portion 400 can completely cover the exposed portion 312. Thus, the stability of the electrical connection relationship between the welding portion 400 and the exposed portion 312 can be improved. The welding portion 400 can also partially cover the body 230. Thus, it is beneficial for the welding portion 400 to be evenly arranged between the first limiting member 210, the second limiting member 220, and the body 230, and the stability of the electrical connection relationship between the welding portion 400 and the exposed portion 312 can be further improved.

[0081] AsFigure 6 As shown, the welding part 400 can be separated from the first extension part 212 and the second extension part 222. Specifically, a space 240 is defined between the first extension part 212 and the second extension part 222, and the welding part 400 is not disposed in the space 240. If solder is filled into the space 240, cavities may be formed inside the solder after the reflow soldering process. When there is moisture in the cavities, in another reflow soldering process of assembling the coil element 10 to another component such as a printed circuit board, the cavities may explode and cause the solder to splash everywhere, thereby causing contamination and short circuits. Therefore, by not disposing the welding part 400 in the space 240, it is beneficial to reduce the probability of contamination and short circuits caused by solder splashing.

[0082] In the present disclosure, by the conductive base 200 simultaneously including the first limiting member 210 and the second limiting member 220, the following advantages can be provided. First, the exposed part 312 can be restricted between the first limiting member 210 and the second limiting member 220, which is beneficial to maintaining the structural strength of the connection part P3. Specifically, the first covering part 214 of the first limiting member 210 and the second covering part 224 of the second limiting member 220 respectively cover the first sub - part P21 and the third sub - part P23 of the wire 300. When the insulating layer 320 of the second sub - part P22 is removed by laser, the first covering part 214 and the second covering part 224 can protect the first sub - part P21 and the third sub - part P23 from laser irradiation. Thus, the exposed part 312 can be restricted between the first limiting member 210 and the second limiting member 220, which is beneficial to maintaining the structural strength of the parts other than the second sub - part P22. For example, the structural strength of the connection part P3 adjacent to the first sub - part P21 can be maintained, and the probability of the connection part P3 breaking when the wire 300 is pulled by an external force F (see Figure 6 ) can be reduced. For example, the core part 100 causes pulling on the connection part P3 due to thermal expansion and contraction.

[0083] Second, since the exposed part 312 is located between the first limiting member 210 and the second limiting member 220, the part where the welding part 400 is connected to the exposed part 312 is also located between the first limiting member 210 and the second limiting member 220. As Figure 6 shown, when the wire 300 is pulled by an external force F (which may be generated by the thermal expansion and contraction of the core part 100), the external force F is transmitted to the first limiting member 210, and the first limiting member 210 can prevent the external force F from being transmitted to the part (i.e., the second sub - part P22) between the first limiting member 210 and the second limiting member 220. Therefore, the influence of the external force F on the electrical connection relationship between the welding part 400 and the exposed part 312 can be reduced.

[0084] Furthermore, when forming the welding part 400, the melted solder covers both the first limiting member 210 and the second limiting member 220 at the same time. During the process of the melted solder cooling and solidifying, the welding part 400 is not likely to shrink towards the limiting member on a single side, which is beneficial to maintaining the width of the welding part 400 (here, the length of the welding part 400 in the Y direction). Thus, the coverage degree of the welding part 400 on the exposed part 312 can be improved. When there is a need to remelt the welding part 400, based on the fact that the welding part 400 covers both the first limiting member 210 and the second limiting member 220 at the same time, the remelted welding part 400 can also maintain its width, and the coverage degree of the remelted welding part 400 on the exposed part 312 can be maintained.

[0085] Compared with the conductive base only provided with a single limiting member, that is, the conductive base only provided with the second limiting member 220 to fix the wire 300 during welding, the connecting part P3 of the wire 300 is adjacent to the exposed part 312. When forming the exposed part 312, due to the limitation of the laser focusing accuracy, the connecting part P3 is also irradiated by the laser and damaged, resulting in the weakening of the structural strength of the connecting part P3. When the wire 300 is pulled by an external force (which can be generated by the thermal expansion and contraction of the core component 100), it is easy to break at the connecting part P3. Furthermore, when the wire 300 is pulled by an external force, due to the lack of protection of the first limiting member 210, the external force will directly act on the welding part 400 and the exposed part 312, and it is easy to cause the separation of the welding part 400 and the exposed part 312.

[0086] In addition, for the conductive base only provided with the second limiting member 220 and not provided with the first limiting member 210, when forming the welding part 400, during the process of the melted solder cooling and solidifying, the melted solder is easily affected by the second limiting member 220 and shrinks towards the second limiting member 220, resulting in the welding part 400 concentrating on the second limiting member 220, and the area of the welding part 400 covering the exposed part 312 becomes smaller. In some examples, the welding part 400 even does not cover the exposed part 312, resulting in no electrical connection being formed between the welding part 400 and the exposed part 312.

[0087] In other words, the present disclosure includes both the first limiting member 210 and the second limiting member 220 in the conductive base 200, which is beneficial to maintaining the structural strength of the connecting part P3, and is beneficial to improving the stability of the electrical connection relationship between the welding part 400 and the exposed part 312, so that the coil component 10 has improved reliability.

[0088] Please refer to Figure 7 , which is a partial side view schematic diagram of the coil component 10a according to another embodiment of the present disclosure. The main difference between the coil component 10a and the coil component 10 is that the structure of the first limiting member 210a is different from the structure of the first limiting member 210.

[0089] Figure 7In [description], the end T21 of the second covering portion 224 of the second limiting member 220 is configured to approach the main body 230, so as to provide the function of clamping and fixing the wire 300 during the welding process. And the end T11 of the first covering portion 214a of the first limiting member 210a is configured to be away from the main body 230. Specifically, the first covering portion 214a has an end T11 and a connecting end T12 connected to the first extending portion 212a, and the end T11 is farther from the first extending portion 212a than the connecting end T12. Thus, the first limiting member 210a only provides the first space 216a for accommodating the first sub-portion P21 of the wire 300 (see Figure 6 ) without clamping the first sub-portion P21 of the wire 300, so that the first sub-portion P21 can be prevented from being clamped by the first limiting member 210a and reducing its tensile breaking strength, and the reliability of the coil element 10a can be further improved.

[0090] There is a first distance SD1 between the first extending portion 212a and the first covering portion 214a, and there is a second distance SD2 between the second extending portion 222 (see Figure 4 ) and the second covering portion 224, and the first distance SD1 can be greater than the second distance SD2. The aforementioned first distance SD1 can refer to the minimum distance between the end T11 of the first covering portion 214a and the first extending portion 212a in the direction X. The aforementioned second distance SD2 can refer to the minimum distance between the end T21 of the second covering portion 224 and the second extending portion 222 in the direction X. The direction X can be parallel to the normal direction of the outer surface of the first sheet body 231 (not shown in the figure). There is an included angle A1 between the first extending portion 212a and the first covering portion 214a, and the included angle A1 can be greater than or equal to 5 degrees and less than or equal to 60 degrees.

[0091] Please refer to Figure 8 , which is a partial side view schematic diagram of the coil element 10b according to another embodiment of the present disclosure. The main difference between the coil element 10b and the coil element 10 is that the structure of the first limiting member 210b is different from the structure of the first limiting member 210. In this embodiment, the first space 216b defined between the first extending portion 212b and the first covering portion 214b of the first limiting member 210b is an arc-shaped space, and the shape of the first space 216b can be matched with the shape of the wire 300, so that the first limiting member 210b only provides the first space 216b for accommodating the first sub-portion P21 of the wire 300 (see Figure 6 ) without clamping the first sub-portion P21 of the wire 300, so that the first sub-portion P21 can be prevented from being clamped by the first limiting member 210b and reducing its tensile breaking strength, and the reliability of the coil element 10b can be further improved.

[0092] As Figure 8As shown, the first covering portion 214b includes an arc segment 2142 corresponding to the arc-shaped space and a terminal segment 2144 connected to the arc segment 2142, and the terminal segment 2144 is parallel to the first extension portion 212b. The aforementioned "the terminal segment 2144 is parallel to the first extension portion 212b" may include that the terminal segment 2144 is parallel or substantially parallel to the first extension portion 212b. Specifically, the terminal segment 2144 defines a first extension direction (i.e., parallel to its length direction), the first extension portion 212b defines a second extension direction (i.e., parallel to its length direction), and there is an included angle between the first extension direction of the terminal segment 2144 and the second extension direction of the first extension portion 212b, and the included angle is within the range of 0 degrees plus or minus 10 degrees (0 ± 10 degrees) or within the range of 180 degrees plus or minus 10 degrees (180 ± 10 degrees).

[0093] Please refer to Figures 1 to 6 , the present disclosure further provides a welding structure (not otherwise labeled). The welding structure includes a conductive base 200, a wire 300, and a welding portion 400. The conductive base 200 includes a first limiting member 210 and a second limiting member 220, and the second limiting member 220 is spaced apart from the first limiting member 210. The wire 300 includes a conductive portion 310 and an insulating layer 320 covering the conductive portion 310, and the conductive portion 310 includes an exposed portion 312 exposed from the insulating layer 320. The wire 300 passes through the first limiting member 210, the exposed portion 312 is located between the first limiting member 210 and the second limiting member 220, and the second limiting member 220 clamps one end of the wire 300. The welding portion 400 at least partially covers the exposed portion 312, the first limiting member 210, and the second limiting member 220, so that the wire 300 is electrically connected to the conductive base 200. By including both the first limiting member 210 and the second limiting member 220 in the conductive base 200, it is beneficial to improve the reliability of the welding structure. For details of the welding structure, reference can be made to the relevant description above, and details will not be elaborated here. In some embodiments, the first limiting member 210 can be replaced with Figure 7 the first limiting member 210a in Figure 8 . In some other embodiments, the first limiting member 210 can be replaced with

[0094] Figures 1 to 8 The embodiment shown is described by applying the welding structure to the coil elements 10, 10a, 10b. However, it is only an example, and the present disclosure is not limited thereto. The welding structure of the present disclosure can be applied to other types of electronic components. By having improved reliability of the welding structure, when an electronic component includes the welding structure of the present disclosure, the electronic component can also have improved reliability.

[0095] Compared with the prior art, since the conductive base of the present disclosure includes both the first limiting member and the second limiting member, it is beneficial to limit the exposed portion of the wire between the first limiting member and the second limiting member, which helps to maintain the structural strength of the connection portion of the wire adjacent to the first limiting member, and can reduce the influence of external force on the electrical connection relationship between the welding portion and the exposed portion. By covering at least partially the exposed portion, the first limiting member and the second limiting member with the welding portion, the present disclosure can prevent the welding portion from shrinking towards a single-side limiting member, which is beneficial to improving the coverage of the welding portion over the exposed portion. Thus, the welding structure of the present disclosure has improved reliability.

[0096] The above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims

1. A welding structure, comprising: A conductive base, comprising: A first limiting member; and A second limiting member, spaced from the first limiting member; A wire, comprising a conductive portion and an insulating layer covering the conductive portion, wherein the conductive portion comprises an exposed portion exposed from the insulating layer, the wire passes through the first limiting member, the exposed portion is located between the first limiting member and the second limiting member, and the second limiting member clamps one end of the wire; and A welding portion, at least partially covering the exposed portion, the first limiting member and the second limiting member, so that the wire is electrically connected to the conductive base.

2. The welding structure according to claim 1, wherein the welding portion completely covers the exposed portion.

3. The welding structure according to claim 1, wherein the first limiting member clamps the wire.

4. The welding structure according to claim 1, wherein the conductive base further comprises a body connected to the first limiting member and the second limiting member.

5. The welding structure according to claim 4, wherein the welding portion further partially covers the body.

6. The welding structure according to claim 4, wherein the first limiting member and the second limiting member are integrally formed on the body.

7. The welding structure according to claim 4, wherein the first limiting member comprises a first extension extending from the body and a first covering portion extending from the first extension toward the body, and the second limiting member comprises a second extension extending from the body and a second covering portion extending from the second extension toward the body.

8. The welding structure according to claim 7, wherein the welding portion is separated from the first extension and the second extension.

9. The welding structure according to claim 8, wherein a space is defined between the first extension and the second extension, and the welding portion is not provided in the space.

10. The welding structure according to claim 7, wherein a first distance is provided between the first extension and the first covering portion, a second distance is provided between the second extension and the second covering portion, and the first distance is greater than the second distance.

11. The welding structure according to claim 7, wherein an angle is provided between the first extension and the first covering portion, and the angle is greater than or equal to 5 degrees and less than or equal to 60 degrees.

12. The welding structure according to claim 7, wherein an arc-shaped space is defined between the first extension and the first covering portion for accommodating the wire.

13. The welding structure according to claim 12, wherein the first covering portion comprises an arc segment corresponding to the arc-shaped space and a terminal segment connected to the arc segment, and the terminal segment is parallel to the first extension.

14. The welding structure according to claim 1, wherein the material of the conductive portion comprises copper, and the material of the welding portion comprises tin.

15. A coil element, comprising: A core member; A conductive base, disposed on the core member, wherein the conductive base comprises a first limiting member and a second limiting member spaced from the first limiting member; A wire is wound around the core member. The wire includes a conductive portion and an insulating layer covering the conductive portion. The conductive portion includes an exposed portion exposed from the insulating layer. The wire passes through the first limiting member. The exposed portion is located between the first limiting member and the second limiting member, and the second limiting member clamps one end of the wire; and A welding portion at least partially covers the exposed portion, the first limiting member, and the second limiting member, so that the wire is electrically connected to the conductive base.

16. The coil element according to claim 15, wherein the material of the core member is a ferromagnetic material.

17. The coil element according to claim 15, wherein the first limiting member clamps the wire.

18. The coil element according to claim 15, wherein the conductive base further includes a body. The first limiting member includes a first extension portion extending from the body and a first covering portion extending from the first extension portion toward the body. The second limiting member includes a second extension portion extending from the body and a second covering portion extending from the second extension portion toward the body.

19. The coil element according to claim 18, wherein there is a first distance between the first extension portion and the first covering portion, there is a second distance between the second extension portion and the second covering portion, and the first distance is greater than the second distance.

20. The coil element according to claim 18, wherein an arc-shaped space is defined between the first extension portion and the first covering portion for accommodating the wire.

Images