Fisheye terminal, circuit board assembly, and vehicle

Abstract

The application relates to a fisheye terminal, a circuit board assembly and a vehicle. The fisheye terminal comprises a fisheye body provided with a fisheye hole, one end of the fisheye body in the extension direction thereof being a plugging end configured to guide the fisheye body to be plugged into a conductive through hole; and a plurality of elastic sheets arranged in the fisheye hole in sequence in a direction away from the plugging end and connected with the fisheye body, the plurality of elastic sheets comprising a first elastic sheet and a second elastic sheet, the average thickness of the first elastic sheet being smaller than that of the second elastic sheet, and the first elastic sheet being closer to the plugging end than the second elastic sheet. In this way, the insertion force of the fisheye terminal can be reduced, but the holding force is larger, the fisheye terminal is easier to enter the conductive through hole, the risk of deformation of the conductive through hole is reduced, and the risk of the fisheye terminal being pulled out of the conductive through hole is also reduced, thereby improving the stability of the fit.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a fisheye terminal, a circuit board assembly, and a vehicle. Background Technology

[0002] With the increasing integration of the automotive industry and electronic information technology, various electronic actuators are used in automobiles. These actuators typically use connectors to interconnect current or signals and perform predetermined circuit functions. Existing connection methods for conducting signals are generally divided into two types: soldered connections and solderless connections. Solderless connection technology is widely used in industries such as communications and automotive electronics, with fisheye terminals being the most common. Fisheye terminals typically include a flexible arm. When using a fisheye terminal for connection, the flexible arm is compressed, causing elastic contraction, allowing the fisheye terminal to be smoothly inserted into the conductive via of the circuit board, thus achieving an electrical connection.

[0003] In related technologies, to meet higher vibration and operational stability requirements, a U-shaped spring is placed in the fisheye hole of the fisheye terminal to compress the elastic arm, thereby increasing the holding force of the elastic arm. However, this solution can also easily lead to greater stress on the conductive vias of the circuit board, resulting in severe deformation. Utility Model Content

[0004] This application provides a fisheye terminal, a circuit board assembly, and a vehicle, which reduces the squeezing force of the fisheye terminal on the conductive vias on the circuit board, thereby at least partially solving the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a fisheye terminal is provided, comprising:

[0006] A fisheye body, having a fisheye hole, wherein one end of the fisheye body in its extending direction is a plug-in end, the plug-in end being configured to guide the fisheye body into a conductive through hole; and

[0007] Multiple spring contacts are sequentially disposed within the fisheye hole and connected to the fisheye body in a direction away from the plug end. The multiple spring contacts include a first spring contact and a second spring contact. The average thickness of the first spring contact is less than the average thickness of the second spring contact, and the first spring contact is closer to the plug end than the second spring contact.

[0008] Optionally, the fisheye body includes two elastic arms connected end to end, with the two elastic arms spaced apart and defining the fisheye opening.

[0009] Optionally, the elastic arm includes a first sub-segment and a second sub-segment connected sequentially in a direction away from the plug end, the first sub-segment being connected to a first spring contact, and the second sub-segment being connected to a second spring contact.

[0010] Optionally, the first spring is a spring structure of equal thickness, and / or the second spring is a spring structure of equal thickness.

[0011] Optionally, the elastic arm further includes a third segment located between the second segment and the first segment; based on the two elastic arms, the outer edge distance between the third segments is greater than either the outer edge distance between the second segments or the outer edge distance between the first segments; the plurality of spring sheets further includes a third spring sheet connected to the third segment, the average thickness of the third spring sheet being less than the average thickness of the second spring sheet.

[0012] Optionally, at least one of the first and third springs is a non-uniform thickness spring structure.

[0013] Optionally, the non-uniform thickness spring structure includes two connecting segments respectively connected to the fisheye body and an intermediate segment connecting the two connecting segments. The minimum thickness of the intermediate segment is t, and the thickness of the root of the connecting segment connected to the fisheye body is T, where t < T.

[0014] Alternatively, t = (0.4~0.95)T.

[0015] Alternatively, t = (0.65~0.75)T.

[0016] Optionally, the thickness of the non-uniform thickness spring structure decreases along the long axis near the fisheye hole.

[0017] Optionally, the thickness of the intermediate segment decreases in the direction away from the connecting segment.

[0018] Optionally, the thickness of the connecting segment decreases in the direction away from the fisheye body.

[0019] Optionally, the connecting segment is configured with equal thickness.

[0020] Optionally, in the width direction of the fisheye hole, the width of the non-uniform thickness spring structure is W1, and the width of the middle section is W2, where W2≥0.1mm and W2=(0.2~0.5)W1.

[0021] Optionally, W2 = (0.35~0.4)W1.

[0022] Optionally, the non-uniform thickness spring sheet structure is arched, the bending angle of the middle section is α, and the bending angle between the two connecting sections is β, where α < β.

[0023] Alternatively, α = (0.4–0.95)β.

[0024] Alternatively, α = (0.72–0.78)β.

[0025] Optionally, the thickness of the connecting segment decreases along the direction away from the fisheye body; the middle segment is set to a constant thickness.

[0026] Optionally, the plurality of spring contacts may further include a fourth spring contact connected to the first sub-segment, the fourth spring contact being closer to the insertion end than the first spring contact.

[0027] Optionally, the plurality of spring contacts may further include a fifth spring contact connected to the second sub-segment, the fifth spring contact being further away from the insertion end than the second spring contact.

[0028] Optionally, the spring is arched away from the fisheye body.

[0029] Optionally, the two adjacent spring clips arch in opposite directions.

[0030] According to a second aspect of this application, a circuit board assembly is provided, including a circuit board and the aforementioned fisheye terminal, wherein the circuit board has a conductive through hole, and the fisheye body is inserted into the conductive through hole.

[0031] According to a third aspect of this application, a vehicle is also provided, including the aforementioned fisheye terminal or the aforementioned circuit board assembly.

[0032] Through the above technical solution, during the insertion of the fisheye terminal into the conductive through-hole, the insertion end guides the fisheye body into the conductive through-hole. The portion of the fisheye body near the insertion end will compress against the wall of the conductive through-hole. Since the first spring piece inside the fisheye hole near the insertion end has a relatively thin average thickness, the force exerted by the first spring piece on the portion of the fisheye body near the insertion end is relatively small. This makes the fisheye body more prone to deformation, and also reduces the force between the fisheye body and the wall of the conductive through-hole. Consequently, the degree of compression of the fisheye body on the through-hole decreases, meaning the insertion force of the fisheye terminal decreases. This not only makes the fisheye body more flexible but also reduces the pressure on the through-hole. It is easier to enter the conductive through hole, and the risk of deformation of the conductive through hole is also reduced, especially the edge near the entrance is less likely to deform and arch outward; as the fisheye body is continuously inserted into the conductive through hole, the part of the fisheye body away from the plug end will also extend into the conductive through hole. Since the average thickness of the second spring piece away from the plug end in the fisheye hole is relatively thick, the second spring piece exerts a larger force on the part of the fisheye body away from the plug end. As a result, the fisheye body maintains a large compressive force on the hole wall of the conductive through hole, that is, the holding force of the fisheye terminal is large, reducing the risk of the fisheye terminal coming out of the conductive through hole and improving the stability of the fit.

[0033] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0036] Figure 1 This is a three-dimensional structural schematic diagram of the fisheye terminal provided in an exemplary embodiment of this application;

[0037] Figure 2 This is a schematic diagram of the main view structure of the fisheye terminal provided in an exemplary embodiment of this application;

[0038] Figure 3 yes Figure 2 Sectional view along the middle AA direction;

[0039] Figures 4-6 yes Figure 2 Sectional view along the BB direction;

[0040] Figures 7-8 yes Figure 2 A cross-sectional view along the CC direction;

[0041] Figure 9 This is a schematic diagram of the structure of the fisheye terminal and the circuit board before assembly, provided in an exemplary embodiment of this application;

[0042] Figure 10 This is a schematic diagram of the structure of the fisheye terminal and the circuit board after assembly in an exemplary embodiment of this application;

[0043] Figure 11 This is a schematic diagram of the vehicle structure provided in an exemplary embodiment of this application.

[0044] Figure 12 This is a simulation fitting image of the fisheye terminal provided in Embodiment 1 of this application;

[0045] Figure 13 This is a simulation fitting image of the fisheye terminal provided in Comparative Example 1 of this application;

[0046] Figure 14 This is a photograph of the fisheye terminal and circuit board assembled according to Comparative Example 1 of this application;

[0047] Figure 15 This is a schematic diagram of the structure of the fisheye terminal and the circuit board after assembly, as provided in Comparative Example 1 of this application.

[0048] Explanation of reference numerals in the attached figures:

[0049] 100. Fisheye terminal; 1. Fisheye body; 11. Elastic arm; 111. First segment; 112. Second segment; 113. Third segment; 12. Plug-in end; 13. Arc-shaped surface; 101. Fisheye hole; 2. Spring; 20. Non-uniform thickness spring structure; 201. Connecting section; 2011. Root; 202. Middle section; 21. First spring; 22. Second spring; 23. Third spring; 24. Fourth spring; 25. Fifth spring; 3. Reinforcing part; 200. Circuit board assembly; 210. Circuit board; 211. Conductive through hole; 300. Vehicle. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0051] Firstly, please see Figures 1-10 This application provides a fisheye terminal 100, which is a conductive terminal. The fisheye terminal 100 can be inserted into and cooperate with the conductive through-hole 211 on the circuit board 210 to realize circuit conduction. The fisheye terminal 100 can be made of one or more metals.

[0052] Specifically, the fisheye terminal 100 includes a fisheye body 1 and a plurality of spring contacts 2. The fisheye body 1 is provided with a fisheye hole 101, and one end of the fisheye body 1 in its extending direction is a plug-in end 12, which is configured to guide the fisheye body 1 to be plugged into a conductive through hole 211. The plurality of spring contacts 2 are sequentially disposed in the fisheye hole 101 and connected to the fisheye body 1 in a direction away from the plug-in end 12. The plurality of spring contacts 2 include a first spring contact 21 and a second spring contact 22. The average thickness of the first spring contact 21 is less than the average thickness of the second spring contact 22, and the first spring contact 21 is closer to the plug-in end 12 than the second spring contact 22.

[0053] The fisheye body 1 is wider in the middle and narrower at both ends, forming a fisheye-like outline. This makes it easier to insert into the conductive via 211 of the circuit board 210 and enhances the connection stability with the conductive via 211. The fisheye body 1 is provided with a fisheye hole 101, which is also shaped like a fisheye. The fisheye body 1 has two opposing ends in its extending direction, one end being a plug-in end 12 and the other end being a retaining end. The plug-in end 12 is used to guide the fisheye body 1 into the conductive via 211 and engage with it when the fisheye terminal 100 is inserted into the conductive via 211.

[0054] "Multiple" refers to two or more. That is, the number of spring clips 2 is at least two. For example, the number of spring clips 2 can be two, three, four, five, or six. All spring clips 2 are disposed within the fisheye hole 101, and the opposite ends of each spring clip 2 are connected to the fisheye body 1. The spring clips 2 and the fisheye body 1 can be integrally formed or welded together. The spring clips 2 are used to apply a force away from the fisheye hole 101 to the fisheye body 1. When the fisheye body 1 is located within the conductive through hole 211, the compressive force between the fisheye body 1 and the hole wall of the conductive through hole 211 increases, thereby allowing the fisheye terminal 100 to be stably held within the conductive through hole 211. Multiple spring clips 2 are disposed independently within the fisheye hole 101, and all spring clips 2 are distributed sequentially along the direction away from the insertion end 12.

[0055] The multiple spring clips 2 include a first spring clip 21 and a second spring clip 22. That is, at least one spring clip 2 is called the first spring clip 21, and at least one spring clip 2 is called the second spring clip 22. The first spring clip 21 and the second spring clip 22 are different spring clips 2. The first spring clip 21 can be of uniform thickness, meaning its thickness is equal or approximately equal at different positions, or it can be of unequal thickness, meaning its thickness is not equal at different positions. Similarly, the second spring clip 22 can be of uniform thickness or of unequal thickness. However, regardless of the thickness, the average thickness of the first spring clip 21 is less than the average thickness of the second spring clip 22. The thickness of the spring clip 2 affects its mechanical strength. Since the average thickness of the first spring clip 21 is less than the average thickness of the second spring clip 22, the mechanical strength of the first spring clip 21 is weaker than that of the second spring clip 22, and consequently, the force exerted by the first spring clip 21 on the fisheye body 1 is less than the force exerted by the second spring clip 22 on the fisheye body 1.

[0056] Furthermore, along the direction away from the insertion end 12, the first spring piece 21 and the second spring piece 22 are distributed sequentially. It can be seen that the first spring piece 21 is closer to the insertion end 12 than the second spring piece 22.

[0057] Through the above technical solution, during the process of inserting the fisheye terminal 100 into the conductive through hole 211, the insertion end 12 guides the fisheye body 1 into the conductive through hole 211. The part of the fisheye body 1 near the insertion end 12 will be squeezed against the hole wall of the conductive through hole 211. Since the first spring piece 21 near the insertion end 12 in the fisheye hole 101 has a relatively thin average thickness, the force exerted by the first spring piece 21 on the part of the fisheye body 1 near the insertion end 12 is small. Thus, the fisheye body 1 is easy to deform, and the force between the fisheye body 1 and the hole wall of the conductive through hole 211 is small. The degree of squeezing of the fisheye body 1 on the conductive through hole 211 decreases, that is, the insertion force of the fisheye terminal 100 is reduced. This not only makes the fisheye body more flexible but also reduces the pressure on the conductive through hole 211. 1. It is easier to enter the conductive through hole 211, and the risk of deformation of the conductive through hole 211 is also reduced, especially the edge near the entrance is less likely to deform and arch outward; as the fisheye body 1 is continuously inserted into the conductive through hole 211, the part of the fisheye body 1 away from the plug end 12 will also extend into the conductive through hole 211. Since the average thickness of the second spring piece 22 away from the plug end 12 in the fisheye hole 101 is relatively thick, the second spring piece 22 exerts a larger force on the part of the fisheye body 1 away from the plug end 12. As a result, the fisheye body 1 maintains a larger compressive force on the hole wall of the conductive through hole 211, that is, the holding force of the fisheye terminal 100 is larger, reducing the risk of the fisheye terminal 100 coming out of the conductive through hole 211 and improving the stability of the fit.

[0058] In some implementations, please refer to Figure 1 The spring piece 2 is arched away from the fisheye body 1. This curved design increases the elastic deformation capacity of the spring piece 2, resulting in less resistance when the fisheye body 1 is inserted into the conductive through hole 211, and a greater holding force after entering the conductive through hole 211. Simultaneously, the spring piece 2 can deform to adapt to the size of the conductive through hole 211, reducing the risk of deformation of the conductive through hole 211. As an example, the side view of the spring piece 2 is U-shaped, semi-circular, or V-shaped. There are multiple spring pieces 2, and the side view shapes of different spring pieces 2 can be the same or different.

[0059] In some implementations, please refer to Figure 1The two adjacent spring pieces 2 arch in opposite directions. The direction of the arching of the spring piece 2 affects the force on the fisheye body 1. By designing the two adjacent spring pieces 2 to arch in opposite directions, the force on the fisheye body 1 can be made more balanced. As an example, there are two spring pieces 2 in the fisheye terminal 100. When the fisheye terminal 100 is placed horizontally, in the thickness direction of the fisheye terminal 100, one spring piece 2 arches upward in a direction away from the fisheye body 1, and this spring piece 2 will generate a downward first component force on the fisheye body 1; the other spring piece 2 arches downward in a direction away from the fisheye body 1, and this spring piece 2 will generate an upward second component force on the fisheye body 1. The first component force and the second component force are in opposite directions and can cancel each other out to a certain extent.

[0060] In some implementations, please refer to Figure 1 The fisheye body 1 includes two elastic arms 11 connected end to end, with the two elastic arms 11 spaced apart and defining a fisheye hole 101. With this arrangement, the elastic arms 11 and the fisheye hole 101 cooperate to give the fisheye body 1 elastic deformation capability, so that the fisheye body 1 can deform when inserted into the conductive through hole 211, reducing the entry resistance, and the fisheye body 1 has a large holding force after entering the conductive through hole 211.

[0061] In some implementations, please refer to Figure 3 , Figure 4 and Figure 7 The edges of the elastic arm 11 are rounded to form an arc-shaped surface 13, which is located outside the fisheye hole 101. It can be understood that when the surface of the elastic arm 11 corresponding to the fisheye hole 101 is considered the inner surface, and the surface of the elastic arm 11 outside the fisheye hole 101 is considered the outer surface, then the arc-shaped surface 13 is the outer surface. The arc-shaped surface 13 makes the outer surface of the elastic arm 11 smoother. When the elastic arm 11 mates with the conductive through hole 211, the elastic arm 11 can make smooth contact with the hole wall of the conductive through hole 211, reducing the risk of the hole wall of the conductive through hole 211 being scratched and damaged, leading to poor contact and other functional degradation.

[0062] In some implementations, please refer to Figure 1 The elastic arm 11 includes a first segment 111 and a second segment 112 connected sequentially in a direction away from the insertion end 12. The first segment 111 is connected to the first spring 21, and the second segment 112 is connected to the second spring 22.

[0063] The elastic arm 11 includes a first segment 111 and a second segment 112. The first segment 111 and the second segment 112 are connected sequentially in a direction away from the insertion end 12. It should be noted that the first segment 111 and the second segment 112 can be directly connected or indirectly connected. The first segment 111 is connected to the first spring piece 21 closer to the insertion end 12, thus fixing the first spring piece 21; the second segment 112 is connected to the second spring piece 22 farther from the insertion end 12, thus fixing the second spring piece 22.

[0064] In some implementations, please refer to Figure 3 The first spring piece 21 is a spring piece structure with uniform thickness. That is to say, the first spring piece 21 is set with uniform thickness, which allows for better calculation and control of the average thickness of the first spring piece 21 and reduces manufacturing difficulty.

[0065] In some implementations, please refer to Figure 7 The second spring 22 is a spring structure with uniform thickness. That is to say, the second spring 22 is set with uniform thickness, which allows for better calculation and control of the average thickness of the second spring 22 and reduces manufacturing difficulty.

[0066] In some implementations, please refer to Figure 1 The elastic arm 11 also includes a third segment 113, which is located between the second segment 112 and the first segment 111. Based on the two elastic arms 11, the distance between the outer edges of the third segment 113 is greater than either the distance between the outer edges of the first segment 111 or the distance between the outer edges of the second segment 112. The plurality of spring pieces 2 also include a third spring piece 23 connected to the third segment 113, and the average thickness of the third spring piece 23 is less than the average thickness of the second spring piece 22.

[0067] The flexible arm 11 also includes a third segment 113, which is located between the second segment 112 and the first segment 111. That is, the first segment 111, the second segment 112 and the third segment 113 are connected in sequence along the direction away from the plug end 12.

[0068] The fisheye body 1 includes two elastic arms 11, each elastic arm 11 including a first sub-segment 111, a second sub-segment 112, and a third sub-segment 113. It can be seen that the fisheye body 1 includes two corresponding first sub-segments 111, two corresponding second sub-segments 112, and two corresponding third sub-segments 113. The width of the fisheye body 1 refers to the distance between the outer edges of the two elastic arms 11 (referred to as the outer edge distance). In the fisheye body 1, the distance between the outer edges of the two first sub-segments 111 is the first width; the distance between the outer edges of the two second sub-segments 112 is the second width; and the distance between the outer edges of the two third sub-segments 113 is the third width. The third width is greater than both the first and second widths. Since the fisheye body 1 has a structure that is narrow at both ends and wide in the middle, the first sub-segment 111 and the second sub-segment 112 correspond to the two ends of the fisheye body 1, respectively, and the third sub-segment 113 corresponds to the middle part of the fisheye body 1.

[0069] The plurality of spring clips 2 also includes a third spring clip 23, meaning that at least one of the multiple spring clips 2 is a third spring clip 23. The third spring clip 23 is connected and fixed to the third sub-segment 113. Along the direction away from the insertion end 12, the first spring clip 21, the third spring clip 23, and the second spring clip 22 are distributed sequentially. The average thickness of the third spring clip 23 is less than the average thickness of the second spring clip 22, therefore the mechanical strength of the third spring clip 23 is weaker than that of the second spring clip 22, and consequently, the force exerted by the third spring clip 23 on the fisheye body 1 is less than the force exerted by the second spring clip 22 on the fisheye body 1. The average thickness of the third spring clip 23 can be greater than the average thickness of the first spring clip 21, or it can be less than or equal to the average thickness of the first spring clip 21.

[0070] When the fisheye body 1 is inserted into the conductive through hole 211, the middle part of the fisheye body 1 with the larger width, namely the third segment 113 of the elastic arm 11, is mainly squeezed against the inner wall of the conductive through hole 211. By thinning the third elastic piece 23, the force exerted by the third elastic piece 23 on the fisheye body 1 can be reduced, thereby reducing the pressure exerted by the fisheye body 1 on the inner wall of the conductive through hole 211 and reducing the risk of deformation of the conductive through hole 211.

[0071] Since the average thickness of the first spring piece 21 is also less than the average thickness of the second spring piece 22, the elastic deformation capability of the front and middle parts of the fisheye body 1 in the insertion direction can be improved, thus reducing the overall insertion force of the fisheye terminal 100. Meanwhile, the mechanical strength of the rear end of the fisheye body 1 in the insertion direction is higher, preventing a decrease in the overall holding force of the fisheye terminal 100. This reduces the risk of deformation of the conductive through-hole 211 when the fisheye terminal 100 is inserted.

[0072] In some implementations, please refer to Figures 4-6 and Figure 8At least one of the first spring clip 21 and the third spring clip 23 is a non-uniform thickness spring clip structure 20. In other words, at least one of the first spring clip 21 and the third spring clip 23 is configured with non-uniform thickness. The non-uniform thickness spring clip structure 20 refers to the spring clip 2 with non-uniform thickness. Possible configurations include: the first spring clip 21 is a uniform thickness spring clip structure, and the third spring clip 23 is a non-uniform thickness spring clip structure 20; the first spring clip 21 is a non-uniform thickness spring clip structure 20, and the third spring clip 23 is a uniform thickness spring clip structure; or both the first spring clip 21 and the third spring clip 23 are non-uniform thickness spring clip structures 20.

[0073] Because of its uneven thickness, the non-uniform thickness spring structure 20 has thicker and thinner parts. The thinner parts will form weak areas. When the non-uniform thickness spring structure 20 is subjected to force, the thinner parts will deform first, thereby reducing the difficulty of deformation of the non-uniform thickness spring structure 20.

[0074] In some implementations, please refer to Figure 5 and Figure 8 The non-uniform thickness spring structure 20 includes two connecting segments 201 that are respectively connected to the fisheye body 1 and an intermediate segment 202 that connects the two connecting segments 201. The minimum thickness of the intermediate segment 202 is t, and the thickness of the root 2011 where the connecting segment 201 connects to the fisheye body 1 is T, where t < T.

[0075] The non-uniform thickness spring structure 20 is connected to the fisheye body 1 at its opposite ends. Thus, from one end of the non-uniform thickness spring structure 20 to the other, the following segments are distributed sequentially: connecting segment 201, intermediate segment 202, and connecting segment 201. It can be seen that there are two connecting segments 201, with the intermediate segment 202 located between them. The two ends of the intermediate segment 202 are connected to the two connecting segments 201 respectively. That is, the two connecting segments 201 extend towards each other and merge with the intermediate segment 202. The connecting segment 201 is connected to the fisheye body 1. When the non-uniform thickness spring structure 20 is the first spring 21, the connecting segment 201 is connected to the first sub-segment 111; when the non-uniform thickness spring structure 20 is the third spring 23, the connecting segment 201 is connected to the third sub-segment 113.

[0076] The connecting segment 201 is connected to the fisheye body 1 via its root 2011. The thickness of the root 2011 is T. The minimum thickness of the intermediate segment 202 is t. When the intermediate segment 202 is of uniform thickness, its minimum thickness is the same as its average thickness. When the intermediate segment 202 is of non-uniform thickness, its minimum thickness is the thickness of the thinnest part of the intermediate segment 202. Since the thickness T of the root 2011 of the connecting segment 201 is greater than the minimum thickness t of the intermediate segment 202, when the non-uniform thickness spring structure 20 is subjected to force, the intermediate segment 202 preferentially deforms at the root 2011 of the connecting segment 201. The greater thickness of the root 2011 also increases the strength of the connection between the root 2011 and the fisheye body 1.

[0077] In some embodiments, the thickness T of the root 2011 and the minimum thickness t of the intermediate segment 202 satisfy the following relationship: t = 0.4 to 0.95T. Alternatively, t / T can be 0.4 to 0.95, for example, any one or any two of 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, and 0.95. If the t / T ratio is too small, the intermediate segment 202 may easily break after being inserted into the conductive via 211, affecting the holding force and functionality of the fisheye terminal 100; if t / T is too large, it will not achieve an effective effect.

[0078] In some embodiments, the thickness T of the root 2011 and the minimum thickness t of the intermediate segment 202 also satisfy the following relationship: t = 0.65 to 0.75T. In this case, the fisheye terminal 100 has both a lower insertion force and a higher retention force. As an example, t / T is a range of any one or any two of 0.65, 0.66, 0.67, 0.68, 0.69, 0.70, 0.71, 0.72, 0.73, 0.74, and 0.75.

[0079] In some implementations, please refer to Figure 5 and Figure 8 Along the direction close to the long axis of the fisheye hole 101, the thickness of the non-uniform thickness spring structure 20 decreases.

[0080] The fisheye aperture 101 is elliptical in shape, narrow at both ends and wide in the middle, and also has a major axis and a minor axis. For example, please refer to... Figure 2 The long axis of the fisheye hole 101 passes through the center of the fisheye hole 101 and extends along the Y-axis; the short axis of the fisheye hole 101 passes through the center of the fisheye hole 101 and extends along the X-axis. The long axis and the short axis intersect and are perpendicular to each other.

[0081] Along the direction close to the long axis of the fisheye hole 101, the distance between the non-uniform thickness spring structure 20 and the fisheye body 1 increases, and the thickness of the non-uniform thickness spring structure 20 decreases instead. That is, the cross-sectional area of ​​the non-uniform thickness spring structure 20 in its thickness direction decreases, and the thickness of the middle part of the non-uniform thickness spring structure 20 reaches its minimum.

[0082] Along the direction close to the long axis of the fisheye hole 101, the connecting segment 201 and the intermediate segment 202 in the non-uniform thickness spring structure 20 are distributed sequentially, that is, the average thickness of the connecting segment 201 is greater than the thickness of the intermediate segment 202. In this way, when the non-uniform thickness spring structure 20 is subjected to force, the intermediate segment 202 deforms first, so that the non-uniform thickness spring structure 20 can apply force evenly to the elastic arms 11 on both sides.

[0083] Along the direction close to the long axis of the fisheye hole 101, the thickness of the non-uniform thickness spring structure 20 decreases. As examples, possible scenarios include: the connecting segment 201 is of non-uniform thickness, and its thickness decreases along the direction close to the long axis of the fisheye hole 101 and away from the fisheye body 1, but the intermediate segment 202 is of uniform thickness, with its thickness less than the minimum thickness of the connecting segment 201; both the connecting segment 201 and the intermediate segment 202 are of non-uniform thickness, and along the direction close to the long axis of the fisheye hole 101 and away from the fisheye body 1, the thickness of both the connecting segment 201 and the intermediate segment 202 decreases, with the maximum thickness of the intermediate segment 202 less than the minimum thickness of the connecting segment 201; the connecting segment 201 is of uniform thickness, but the intermediate segment 202 is of non-uniform thickness, and along the direction close to the long axis of the fisheye hole 101 and away from the fisheye body 1, the thickness of the intermediate segment 202 decreases, with the maximum thickness of the intermediate segment 202 less than the average thickness of the connecting segment 201.

[0084] The thickness of the non-uniform thickness spring structure 20 decreases either gradually or with a gradient. The gradient decrease can be either an equal gradient decrease or a non-uniform gradient decrease.

[0085] In some embodiments, the intermediate section 202 is of uniform thickness; the thickness of the connecting section 201 decreases along the direction away from the fisheye body 1.

[0086] In some implementations, please refer to Figure 5 and Figure 8 Along the direction away from connecting segment 201, the thickness of the intermediate segment 202 decreases. The intermediate segment 202 is of non-uniform thickness. The two ends of the intermediate segment 202 connect to the connecting segment 201. That is, the thickness of the intermediate segment 202 decreases from both ends towards the middle. In this way, the non-uniform thickness spring structure 20 can apply force evenly to the elastic arms 11 on both sides. Optionally, the connecting segment 201 is of non-uniform thickness; the thickness of the connecting segment 201 decreases along the direction away from the fisheye body 1. Optionally, the connecting segment 201 is of uniform thickness.

[0087] In some implementations, please refer to Figure 5 and Figure 8 The connecting section 201 is of uniform thickness. Along the direction away from the connecting section 201, the thickness of the intermediate section 202 decreases. Thus, the connecting section 201 is also called the non-gradient zone, and the intermediate section 202 is called the gradient zone. In the width direction of the fisheye hole 101, the width of the non-uniform thickness spring structure 20 is W1, and the width of the intermediate section 202 is W2, where W2 ≥ 0.1 mm and W2 = 0.2~0.5W1. The width W2 of the intermediate section 202 should not be too small, as this will lead to excessive stress concentration in the intermediate section 202, making it prone to fracture, and significantly increasing the difficulty and cost of mold forming. As an example, W2 / W1 is any one or any two of the values ​​of 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, and 0.5.

[0088] In some embodiments, the width W1 of the non-uniform thickness spring structure 20 and the width W2 of the intermediate section 202 also satisfy the following relationship: W2 = 0.35 to 0.4W1. As an example, W2 / W1 is a range of any one or any two of 0.35, 0.36, 0.37, 0.38, 0.39 and 0.40.

[0089] In some implementations, please refer to Figure 6 The non-uniform thickness spring structure 20 is arched, with the bending angle of the middle section 202 being α and the bending angle between the two connecting sections 201 being β, where α < β. Typically, the apex of the arched non-uniform thickness spring structure 20 is the midpoint of the middle section 202. Extending directions of the middle section 202 are drawn outwards from this midpoint, and the angle between the two different extension directions is the bending angle α of the middle section 202. The bending angle β between the two connecting sections 201 is the angle between the extension directions of the two connecting sections 201. The bending angle α of the middle section 202 is less than the bending angle β between the two connecting sections 201, indicating that the degree of bending of the middle section 202 is greater than that of the connecting sections 201. This is beneficial for improving the elastic deformation capability of the non-uniform thickness spring structure 20.

[0090] In some embodiments, the bending angle α of the intermediate segment 202 and the bending angle β between the two connecting segments 201 satisfy the following relationship: α = (0.4~0.95)β. As an example, the ratio of α / β is a range of any one or any two of 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, and 0.95.

[0091] In some embodiments, the bending angle α of the intermediate segment 202 and the bending angle β between the two connecting segments 201 also satisfy the following relationship: α = (0.72 ~ 0.78)β. As an example, the ratio of α / β is a range of any one or any two of 0.72, 0.73, 0.74, 0.75, 0.76, 0.77, and 0.78.

[0092] In some implementations, please refer to Figure 1 The multiple springs 2 also include a fourth spring 24 connected to the first segment 111, the fourth spring 24 being closer to the insertion end 12 than the first spring 21.

[0093] In some implementations, please refer to Figure 1 The multiple springs 2 also include a fifth spring 25 connected to the second sub-segment 112, the fifth spring 25 being further away from the insertion end 12 than the second spring 22.

[0094] In some implementations, please refer to Figure 1 The multiple spring contacts 2 include a fourth spring contact 24, a first spring contact 21, a third spring contact 23, a second spring contact 22, and a fifth spring contact 25, which are sequentially distributed along the direction away from the insertion end 12. Among them, the first spring contact 21, the third spring contact 23, and the second spring contact 22 are the main functional spring contacts and are the main factors affecting the insertion force and retention force of the fisheye terminal 100. The fourth spring contact 24 and the fifth spring contact 25 are auxiliary spring contacts and have a smaller impact on the insertion force and retention force of the fisheye terminal 100.

[0095] In some implementations, please refer to Figure 1 The connector 12 is tapered. This design allows the connector 12 to better guide the fisheye terminal 100 into the conductive via 211. As an example, the connector 12 includes four trapezoidal bevels, giving it guide chamfers on all four sides. The end of the connector 12 has a rounded arc structure. When the fisheye terminal 100 is inserted into the conductive via 211 of the circuit board 210, the connector 12 acts as a guide, reducing the risk of damage caused by hard interference between the fisheye terminal 100 and the circuit board 210.

[0096] In some implementations, please refer to Figure 1 and Figure 2 The fisheye terminal 100 also includes a reinforcing part 3, which is connected to the end of the fisheye body 1 away from the insertion end 12. The reinforcing part 3 enhances the overall structural strength of the fisheye terminal 100. As an example, the reinforcing part 3 is a metal block, which is integrally formed with the fisheye body 1.

[0097] Secondly, please see Figure 9 and Figure 10This application provides a circuit board assembly 200, including a circuit board 210 and the aforementioned fisheye terminal 100. The circuit board 210 has a conductive through hole 211, and the fisheye body 1 is inserted into the conductive through hole 211.

[0098] The circuit board assembly 200 includes the aforementioned fisheye terminal 100, and therefore the circuit board assembly 200 has all the beneficial effects of the aforementioned fisheye terminal 100, which will not be elaborated here.

[0099] Thirdly, please see Figure 11 This application provides a vehicle 300, which includes the above-mentioned fisheye terminal 100 or the above-mentioned circuit board assembly 200.

[0100] The vehicle 300 includes the aforementioned fisheye terminal 100 or the aforementioned circuit board assembly 200, and therefore the vehicle 300 has all the beneficial effects of the aforementioned fisheye terminal 100 or the aforementioned circuit board assembly 200, which will not be elaborated here.

[0101] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not make any specific restrictions.

[0102] The following description is based on specific embodiments.

[0103] Example 1

[0104] Please see Figure 9 This embodiment provides a fisheye terminal 100 comprising a fourth spring 24, a first spring 21, a third spring 23, a second spring 22, and a fifth spring 25. The average thickness of the first spring 21 and the average thickness of the third spring 23 of the fisheye terminal 100 are both less than the average thickness of the second spring 22. Simulation fitting is performed on the fisheye terminal 100, and the simulation fitting results are as follows... Figure 12 As shown in the figure. Simulation results show that the insertion force of the fisheye terminal 100 is 61.87 N, the holding force is 48.41 N, and the ratio of insertion force to holding force is 1.28. After the fisheye terminal 100 is assembled with the circuit board 210, the conductive via 211 on the circuit board 210 remains essentially unchanged. The structure of the fisheye terminal 100 assembled with the circuit board 210 is shown in the figure. Figure 10 As shown.

[0105] Comparative Example 1

[0106] Comparative Example 1 also provides a fisheye terminal 100'. The difference between fisheye terminal 100' and fisheye terminal 100 is that the thicknesses of the first spring 21, the third spring 23, and the second spring 22 in fisheye terminal 100 are adjusted to be the same. Simulation fitting is performed on fisheye terminal 100', and the simulation fitting results are as follows... Figure 13As shown in the figure. Simulation results show that the insertion force of the fisheye terminal 100' increases to 69.2 N, the holding force increases to 50.37 N, and the ratio of insertion force to holding force is 1.37. After the fisheye terminal 100' is assembled with the circuit board 210, the conductive via 211 on the circuit board 210 deforms, especially the edges of the circuit board 210 bulge, as shown in the physical diagram. Figure 14 As shown, the structural diagram of the fisheye terminal 100' assembled with the circuit board 210 is as follows. Figure 15 As shown.

[0107] Further comparison Figure 12 and Figure 13 It can be seen that the stress concentration problem after the fisheye terminal 100 provided in Example 1 is assembled with the circuit board 210 is effectively alleviated compared with the fisheye terminal 100' provided in Comparative Example 1.

[0108] In summary, reducing the insertion force of the fisheye terminal 100 while maintaining a relatively large holding force can not only reduce the risk of deformation of the conductive via 211, but also improve the stability and reliability of the assembly of the fisheye terminal 100 and the circuit board 210.

[0109] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0110] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0111] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0112] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A fisheye terminal (100), characterized in that, include: The fisheye body (1) is provided with a fisheye hole (101). One end of the fisheye body (1) in its extension direction is a plug-in end (12). The plug-in end (12) is configured to guide the fisheye body (1) to be plugged into the conductive through hole (211). Multiple spring clips (2) are sequentially arranged in the fisheye hole (101) and connected to the fisheye body (1) in a direction away from the plug end (12). The multiple spring clips (2) include a first spring clip (21) and a second spring clip (22). The average thickness of the first spring clip (21) is less than the average thickness of the second spring clip (22), and the first spring clip (21) is closer to the plug end (12) than the second spring clip (22).

2. The fisheye terminal (100) according to claim 1, characterized in that, The fisheye body (1) includes two elastic arms (11) connected end to end, with the two elastic arms (11) spaced apart and defining the fisheye hole (101).

3. The fisheye terminal (100) according to claim 2, characterized in that, The elastic arm (11) includes a first sub-segment (111) and a second sub-segment (112) connected sequentially in a direction away from the plug end (12). The first sub-segment (111) is connected to the first spring piece (21), and the second sub-segment (112) is connected to the second spring piece (22).

4. The fisheye terminal (100) according to claim 3, characterized in that, The first spring (21) is a spring structure of equal thickness, and / or the second spring (22) is a spring structure of equal thickness.

5. The fisheye terminal (100) according to claim 3, characterized in that, The elastic arm (11) further includes a third sub-segment (113) located between the second sub-segment (112) and the first sub-segment (111); based on the two elastic arms (11), the outer edge distance between the third sub-segments (113) is greater than either the outer edge distance between the second sub-segments (112) or the outer edge distance between the first sub-segments (111); the plurality of spring sheets (2) further includes a third spring sheet (23) connected to the third sub-segment (113), the average thickness of the third spring sheet (23) being less than the average thickness of the second spring sheet (22).

6. The fisheye terminal (100) according to claim 5, characterized in that, At least one of the first spring (21) and the third spring (23) is a non-uniform thickness spring structure (20).

7. The fisheye terminal (100) according to claim 6, characterized in that, The non-uniform thickness spring structure (20) includes two connecting segments (201) that are respectively connected to the fisheye body (1) and an intermediate segment (202) connecting the two connecting segments (201). The minimum thickness of the intermediate segment (202) is t, and the thickness of the root (2011) where the connecting segment (201) is connected to the fisheye body (1) is T, where t < T.

8. The fisheye terminal (100) according to claim 7, characterized in that, t = (0.4 ~ 0.95)T.

9. The fisheye terminal (100) according to claim 8, characterized in that, t = (0.65 ~ 0.75)T.

10. The fisheye terminal (100) according to claim 7, characterized in that, Along the long axis near the fisheye hole (101), the thickness of the non-uniform thickness spring structure (20) decreases.

11. The fisheye terminal (100) according to claim 10, characterized in that, The thickness of the intermediate segment (202) decreases in the direction away from the connecting segment (201).

12. The fisheye terminal (100) according to claim 11, characterized in that, The thickness of the connecting segment (201) decreases in the direction away from the fisheye body (1).

13. The fisheye terminal (100) according to claim 11, characterized in that, The connecting segment (201) is of uniform thickness.

14. The fisheye terminal (100) according to claim 13, characterized in that, In the width direction of the fisheye hole (101), the width of the non-uniform thickness spring structure (20) is W1, and the width of the middle section (202) is W2, where W2≥0.1mm and W2=(0.2~0.5)W1.

15. The fisheye terminal (100) according to claim 14, characterized in that, W2 = (0.35 ~ 0.4)W1.

16. The fisheye terminal (100) according to claim 13, characterized in that, The non-uniform thickness spring structure (20) is arched, the bending angle of the middle section (202) is α, the bending angle between the two connecting sections (201) is β, and α < β.

17. The fisheye terminal (100) according to claim 16, characterized in that, α＝(0.4～0.95)β。 18. The fisheye terminal (100) according to claim 17, characterized in that, α＝(0.72～0.78)β。 19. The fisheye terminal (100) according to claim 10, characterized in that, Along the direction away from the fisheye body (1), the thickness of the connecting section (201) decreases; the middle section (202) is of equal thickness.

20. The fisheye terminal (100) according to claim 3, characterized in that, The plurality of spring clips (2) further include a fourth spring clip (24) connected to the first sub-segment (111), the fourth spring clip (24) being closer to the plug end (12) than the first spring clip (21).

21. The fisheye terminal (100) according to claim 3, characterized in that, The plurality of spring clips (2) also include a fifth spring clip (25) connected to the second sub-segment (112), the fifth spring clip (25) being further away from the plug end (12) than the second spring clip (22).

22. The fisheye terminal (100) according to any one of claims 1 to 21, characterized in that, The spring (2) is arched away from the fisheye body (1).

23. The fisheye terminal (100) according to claim 22, characterized in that, The two adjacent spring pieces (2) arch in opposite directions.

24. A circuit board assembly (200), characterized in that, The device includes a circuit board (210) and a fisheye terminal (100) as described in any one of claims 1 to 23, wherein the circuit board (210) has a conductive through hole (211) and the fisheye body (1) is inserted into the conductive through hole (211).

25. A vehicle (300), characterized in that, Includes the fisheye terminal (100) as described in any one of claims 1 to 23 or the circuit board assembly (200) as described in claim 24.

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