Conductive terminal and electronic device
Patent Information
- Application Number
- CN202522519603.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-11-27
AI Technical Summary
[0003]然而，在高温回流焊工艺过程中，当工艺温度升至230℃以上时，导电端子的绝缘薄膜表面的锡将呈现熔融状态，致使搭接结构的接缝处粘结强度显著衰减
导电端子包括弹性芯体以及紧密包裹于弹性芯体外周的柔性金属化薄膜；其中，柔性金属化薄膜具有第一边缘区域以及第二边缘区域，第一边缘区域与第二边缘区域至少部分搭接重叠，以形成搭接部；搭接部靠近弹性芯体一侧的第一边缘区域开设有至少一个通孔，且搭接部中至少通孔区域设置有粘接层，第二边缘区域通过粘接层与弹性芯体粘接固定。通过在搭接部靠近弹性芯体一侧的第一边缘区域开设通孔，也即该通孔贯穿第一边缘区域靠近弹性芯体的一侧，并在通孔内设置粘接层，使得粘接层能够与弹性芯体进行粘接。如此，第二边缘区域可直接通过粘接层与弹性芯体进行粘接固定，能够有效抵抗弹性芯体受热产生的膨胀力，提高柔性金属化薄膜的第一边缘区域与第二边缘区域搭接重叠，形成的搭接部的粘接强度，防止搭接部发生开裂或爆开的现象，从而提高了产品的可靠性与稳定性。
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Figure CN224804237U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic device technology, and more specifically, to a conductive terminal and an electronic device. Background Technology
[0002] In applications such as automotive electronics soldering, the conductive terminals used in existing surface mount technology (SMT) are usually simple overlapping structures, which can meet the basic conductivity and mechanical connection requirements under normal temperature conditions.
[0003] However, during the high-temperature reflow soldering process, when the process temperature rises above 230°C, the tin on the surface of the insulating film of the conductive terminals will melt, causing a significant decrease in the bonding strength at the joint of the overlapping structure. At the same time, the foam inside the conductive terminals expands under high temperature, and the resulting expansion force can easily cause cracking or bursting at the joint, seriously affecting the reliability and stability of the product. Utility Model Content
[0004] The purpose of this invention is to provide a conductive terminal and electronic device that can improve the bonding strength of the overlapping part of the conductive terminal, prevent the overlapping part from cracking or bursting, thereby improving the reliability and stability of the product.
[0005] The embodiments of this utility model are implemented as follows: In a first aspect, the present invention provides a conductive terminal, comprising an elastic core and a flexible metallized film tightly wrapped around the periphery of the elastic core. The flexible metallized film has a first edge region and a second edge region, wherein the first edge region and the second edge region at least partially overlap to form an overlap portion; At least one through hole is provided in the first edge region of the overlapping portion near the elastic core, and at least the through hole region of the overlapping portion is provided with an adhesive layer, and the second edge region is bonded and fixed to the elastic core through the adhesive layer.
[0006] In an optional embodiment, the adhesive layer is provided between the overlapping areas of the first edge region and the second edge region, and the overlapping portion of the first edge region is bonded and fixed to the overlapping portion of the second edge region through the adhesive layer.
[0007] In an optional embodiment, there are multiple through holes, which are spaced apart, and each through hole is filled with the adhesive layer.
[0008] In an optional embodiment, the plurality of through holes are evenly spaced along the length direction of the elastic core.
[0009] In an optional embodiment, the width of the overlap is greater than or equal to 1.5 mm.
[0010] In an optional embodiment, the corners of the flexible metallized film surrounding the elastic core are chamfered.
[0011] In an optional embodiment, the through hole is a waist-shaped hole.
[0012] In an optional embodiment, the flexible metallized film is a metallized polyimide film.
[0013] In an optional embodiment, the elastic core is a compressible porous structure made of foam, silicone, or rubber.
[0014] Secondly, the present invention provides an electronic device including the conductive terminals described in any of the foregoing embodiments.
[0015] The beneficial effects of this utility model embodiment include: The conductive terminal includes an elastic core and a flexible metallized film tightly wrapped around the periphery of the elastic core. The flexible metallized film has a first edge region and a second edge region, which at least partially overlap to form an overlap portion. At least one through-hole is formed in the first edge region of the overlap portion near the elastic core, and an adhesive layer is disposed in at least the through-hole region of the overlap portion. The second edge region is bonded to the elastic core via the adhesive layer. By forming a through-hole in the first edge region of the overlap portion near the elastic core—that is, the through-hole penetrates the first edge region near the elastic core—and disposing of the adhesive layer within the through-hole, the adhesive layer can be bonded to the elastic core. Thus, the second edge region can be directly bonded to the elastic core via the adhesive layer, effectively resisting the expansion force generated by the elastic core due to heat, improving the bonding strength of the overlap portion formed by the overlapping of the first and second edge regions of the flexible metallized film, preventing cracking or bursting of the overlap portion, thereby improving the reliability and stability of the product.
[0016] Electronic devices include conductive terminals that have all the beneficial effects of such conductive terminals. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A schematic diagram of the first assembly state of the conductive terminal provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the conductive terminal provided in the second assembly state according to an embodiment of the present invention.
[0019] Icons: 100 - Conductive terminal; 10 - Elastic core; 20 - Flexible metallized film; 21 - First edge region; 22 - Second edge region; 23 - Overlap; 231 - Through hole; 232 - Adhesive layer. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0024] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0026] As described in the background section, during the high-temperature reflow soldering process of existing conductive terminals, when the process temperature rises above 230°C, the tin on the surface of the insulating film melts, causing a significant decrease in the bonding strength at the joint of the overlapping structure. At the same time, the foam inside the conductive terminal expands under high temperature, and the resulting expansion force can easily cause cracking or bursting at the joint, seriously affecting the reliability and stability of the product.
[0027] Based on this, please refer to Figure 1 and Figure 2 The present invention provides a conductive terminal 100 and an electronic device that effectively improves the aforementioned technical problems. Specifically, it enhances the bonding strength of the overlapping portion 23 of the conductive terminal 100, preventing cracking or bursting of the overlapping portion 23, thereby improving the reliability and stability of the product. The conductive terminal 100 and the electronic device will be described in detail below.
[0028] This embodiment provides an electronic device, which includes conductive terminals 100, which can realize the connection between related components or circuits in the electronic device.
[0029] For details, please refer to Figure 1 and Figure 2 , Figure 1 This is a structural schematic diagram of the first assembly state of the conductive terminal 100 provided in this embodiment. Figure 2 This is a schematic diagram of the conductive terminal 100 provided in this embodiment in a second assembly state. (Combined with...) Figure 1 and Figure 2 The conductive terminal 100 includes an elastic core 10 and a flexible metallized film 20 tightly wrapped around the outer periphery of the elastic core 10.
[0030] The flexible metallized film 20 has a first edge region 21 and a second edge region 22, which at least partially overlap to form an overlap portion 23. The first edge region 21 of the overlap portion 23, near the elastic core 10, has at least one through-hole 231, and at least the area of the through-hole 231 in the overlap portion 23 is provided with an adhesive layer 232. The second edge region 22 is bonded and fixed to the elastic core 10 through the adhesive layer 232.
[0031] It is easy to understand that by opening a through hole 231 in the first edge region 21 near the elastic core 10 of the overlapping portion 23, that is, by having the through hole 231 penetrate through the first edge region 21 near the elastic core 10, and by providing an adhesive layer 232 within the through hole 231, the adhesive layer 232 can be bonded to the elastic core 10. In this way, the second edge region 22 can be directly bonded and fixed to the elastic core 10 through the adhesive layer 232, which can effectively resist the expansion force generated by the elastic core 10 when heated, improve the bonding strength of the overlapping portion 23 formed by the overlap of the first edge region 21 and the second edge region 22 of the flexible metallized film 20, and prevent the overlapping portion 23 from cracking or bursting, thereby improving the reliability and stability of the product.
[0032] It should be noted that the first assembly state of the conductive terminal 100 mentioned above can be understood as the state in which the second edge region 22 needs to be bonded to the elastic core 10 through the adhesive layer 232 during the process of the flexible metallized film 20 wrapping the elastic core 10. The second assembly state of the conductive terminal 100 can be understood as the state in which the second edge region 22 overlaps the first edge region 21 and has been bonded to the adhesive layer 232 to form an overlap portion 23.
[0033] In this embodiment, the flexible metallized film 20 is specifically a metallized polyimide film, commonly known as a PI (Polyimide) film. Optionally, the PI film can be tin-plated to form a tin-plated PI film. The metal disposed on the polyimide film can also be copper, nickel, silver, aluminum, or other metals, or alloys such as copper-nickel alloys, silver-copper alloys, etc. Of course, in other embodiments, the flexible metallized film 20 can also be other types of insulating films such as metallized polyester films, commonly known as PET (Polyethylene Terephthalate) films.
[0034] Additionally, it should be noted that the elastic core 10 can be a compressible porous structure made of foam, silicone, or rubber.
[0035] In order to further improve the bonding strength of the overlap portion 23 of the conductive terminal 100, in this embodiment, an adhesive layer 232 is also provided between the overlap areas of the first edge region 21 and the second edge region 22. The overlap portion of the first edge region 21 is bonded and fixed to the overlap portion of the second edge region 22 through the adhesive layer 232.
[0036] It should be noted that the adhesive layer 232 mentioned above can be, but is not limited to, an adhesive structure formed by other adhesive materials such as glue, double-sided tape, or hot melt adhesive film. For example, if the adhesive layer 232 is formed by glue, then in the actual assembly process, the glue can be applied to the side of the first edge region 21 or the second edge region 22 that are close to each other, and also applied inside the through hole 231, so that the glue fills the entire through hole 231. Then the second edge region 22 is overlapped on the first edge region 21. After the glue solidifies, the adhesive layer 232 is formed in the through hole 231 and in the overlapping area of the first edge region 21 and the second edge region 22.
[0037] Please continue to combine Figure 1 and Figure 2 In order to improve the bonding strength between the second edge region 22 and the elastic core 10, and to further ensure the operational reliability and stability of the conductive terminal 100, in this embodiment, there are multiple through holes 231, which are spaced apart, and each through hole 231 is filled with an adhesive layer 232.
[0038] Specifically, multiple through holes 231 are evenly spaced along the length of the elastic core 10, which can further improve the bonding strength between the second edge region 22 and the elastic core 10.
[0039] It should be noted that the length direction of the elastic core 10 is... Figure 1 and Figure 2 The direction A is shown in the diagram. Furthermore, in conjunction with... Figure 1 It should also be pointed out that, Figure 1 Only a portion of the structure of the conductive terminal 100 is shown; its entirety extends along direction A, and the multiple through holes 231 are also spaced apart along direction A. Therefore, Figure 1 The two through holes 231 shown in the figure can actually be understood as one of which has been partially cut off.
[0040] Furthermore, in this embodiment, the through hole 231 is specifically an oblong hole, which is easy to process and can fill more of the adhesive layer 232, thereby increasing the bonding area between the adhesive layer 232 and the elastic core 10, and thus further improving the bonding strength. Of course, in other embodiments, the through hole 231 can also be a hole of other shapes such as a circular hole, a square hole, or a triangular hole.
[0041] Combination Figure 2 In this embodiment, the width of the overlap 23 is greater than or equal to 1.5 mm, that is... Figure 2 The width L in the figure is ≥1.5mm. For example, the width L of the overlap 23 can be 1.5mm, 2mm, 2.5mm, or 3mm, etc. It should be noted that limiting the width of the overlap 23 of the flexible metallized film 20 to at least 1.5mm can ensure continuous and stable conductivity, reduce contact resistance and transmission loss and extend service life. At the same time, it can strengthen the structural robustness to adapt to the deformation of the elastic core 10, prevent the film from warping and cracking, form a closed shielding layer to improve the electromagnetic shielding effect, eliminate signal interference, reduce impurity penetration and environmental corrosion to enhance adaptability to harsh working conditions, and reduce the processing and assembly precision requirements, improve production yield and control costs.
[0042] Furthermore, in this embodiment, the corners where the flexible metallized film 20 wraps around the elastic core 10 are chamfered. It is easy to understand that the chamfering prevents the flexible metallized film 20 from tearing or excessively abrading at bends, and also avoids damage to the elastic core 10 during installation, further improving the reliability and stability of the product.
[0043] In summary, the embodiments of this utility model provide a conductive terminal 100 and an electronic device. The conductive terminal 100 includes an elastic core 10 and a flexible metallized film 20 tightly wrapped around the outer periphery of the elastic core 10. The flexible metallized film 20 has a first edge region 21 and a second edge region 22. The first edge region 21 and the second edge region 22 at least partially overlap to form an overlap portion 23. The first edge region 21 of the overlap portion 23 near the elastic core 10 has at least one through hole 231, and at least the through hole 231 area of the overlap portion 23 is provided with an adhesive layer 232. The second edge region 22 is bonded and fixed to the elastic core 10 through the adhesive layer 232. By creating a through hole 231 in the first edge region 21 near the elastic core 10 of the overlap portion 23, and placing an adhesive layer 232 within the through hole 231, the adhesive layer 232 can be bonded to the elastic core 10. In this way, the second edge region 22 can be directly bonded to the elastic core 10 via the adhesive layer 232, effectively resisting the expansion force generated by the elastic core 10 under heat. This improves the bonding strength of the overlap portion 23 formed by the overlap of the first edge region 21 and the second edge region 22 of the flexible metallized film 20, preventing cracking or bursting of the overlap portion 23, thereby improving the reliability and stability of the product.
[0044] The electronic device includes a conductive terminal 100, which has all the functions and benefits of the conductive terminal 100.
[0045] The above description is merely a specific embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A conductive terminal, characterized in that, It includes an elastic core (10) and a flexible metallized film (20) tightly wrapped around the outer periphery of the elastic core (10). The flexible metallized film (20) has a first edge region (21) and a second edge region (22), wherein the first edge region (21) and the second edge region (22) overlap at least partially to form an overlap portion (23). The first edge region (21) of the overlapping portion (23) near the elastic core (10) has at least one through hole (231), and at least the through hole (231) region of the overlapping portion (23) is provided with an adhesive layer (232), and the second edge region (22) is bonded and fixed to the elastic core (10) through the adhesive layer (232).
2. The conductive terminal according to claim 1, characterized in that, An adhesive layer (232) is provided between the overlapping areas of the first edge region (21) and the second edge region (22). The overlapping portion of the first edge region (21) is bonded and fixed to the overlapping portion of the second edge region (22) through the adhesive layer (232).
3. The conductive terminal according to claim 1, characterized in that, The number of through holes (231) is multiple, and the multiple through holes (231) are spaced apart, and each through hole (231) is filled with the adhesive layer (232).
4. The conductive terminal according to claim 3, characterized in that, The plurality of through holes (231) are evenly spaced along the length direction of the elastic core (10).
5. The conductive terminal according to claim 1, characterized in that, The width of the overlapping portion (23) is greater than or equal to 1.5 mm.
6. The conductive terminal according to claim 1, characterized in that, The flexible metallized film (20) is chamfered at the corners of the elastic core (10).
7. The conductive terminal according to any one of claims 1-6, characterized in that, The through hole (231) is a waist-shaped hole.
8. The conductive terminal according to any one of claims 1-6, characterized in that, The flexible metallized film (20) is a metallized polyimide film.
9. The conductive terminal according to any one of claims 1-6, characterized in that, The elastic core (10) is a compressible porous structure made of foam, silicone or rubber.
10. An electronic device, characterized in that, Includes the conductive terminal (100) as described in any one of claims 1-9.