A flexible printed circuit board serpentine trace structure
Patent Information
- Application Number
- CN202522267395.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-10-27
AI Technical Summary
传统的柔性线路板蛇形导线结构多为固定间距设计，无法根据实际情况灵活调整，这导致在设备运行环境发生变化时，导线易因间距不匹配出现拉扯、挤压等问题，不仅会影响信号传输的稳定性，还可能加速导线老化，缩短其使用寿命，甚至引发电路故障，给设备的正常运行带来隐患，为此我们提出了一种可调节间距的柔性线路板蛇形导线结构
该可调节间距的柔性线路板蛇形导线结构，通过第一固定框、第二固定框、第三固定框与间距调节板的组合设计，借助导向柱上的拉伸弹簧实现柔性线路板本体间距的灵活调节；第二固定框通过受压条与间距调节板的导向槽滑动配合，搭配导向柱的导向作用，确保调节过程中第二固定框移动平稳，避免柔性线路板本体偏移或扭曲；第一施压条、第二施压条及受压条的多重施压结构，配合固定弹簧等部件，使柔性线路板本体始终保持稳定导电接触，防止因调节导致接触不良；整体结构中各固定框与间距调节板的连接方式稳固可靠，能将拉伸弹簧的弹力高效转化为调节动力，提升了结构的实用性与耐用性。
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Figure CN224890942U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flexible circuit board technology, specifically to a flexible circuit board serpentine conductor structure with adjustable spacing. Background Technology
[0002] The flexible circuit board serpentine conductor structure is a device based on flexible circuit boards that achieves circuit connection and signal transmission through serpentine wiring design. Due to its flexibility, it can adapt to different spatial layouts and is widely used in the miniaturization and integration of electronic devices. The adjustable spacing of this structure can meet the spacing changes caused by thermal expansion and contraction, vibration and other factors during the assembly, use and maintenance of the equipment, ensuring stable circuit operation and meeting the connection requirements under diverse working conditions. Traditional flexible circuit board serpentine conductor structures are mostly designed with fixed spacing, which cannot be flexibly adjusted according to actual conditions. This leads to problems such as pulling and squeezing of conductors due to mismatched spacing when the equipment operating environment changes. This not only affects the stability of signal transmission, but may also accelerate conductor aging, shorten their service life, and even cause circuit failures, posing a hidden danger to the normal operation of the equipment. To address this, we propose a flexible circuit board serpentine conductor structure with adjustable spacing. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides a flexible circuit board serpentine conductor structure with adjustable spacing, thus solving the aforementioned problems.
[0004] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a flexible circuit board serpentine conductor structure with adjustable spacing, comprising: The system comprises a flexible circuit board body, a first fixed frame, a second fixed frame, a third fixed frame, and a spacing adjustment plate. The first fixed frame and the third fixed frame are fixedly installed on both sides of the spacing adjustment plate, and the first fixed frame and the third fixed frame are symmetrically distributed. The second fixed frame is slidably installed inside the spacing adjustment plate, and the second fixed frame is located between the first fixed frame and the third fixed frame and is slidably engaged. The flexible circuit board body is installed inside the spacing adjustment plate, and the flexible circuit board body passes through the first fixed frame, the second fixed frame, and the third fixed frame respectively. The first fixing frame, the second fixing frame and the third fixing frame are respectively provided with pressure strips inside, wherein the flexible circuit board body is located above the pressure strips, the third fixing frame is provided with a second pressure strip inside, the bottom end of the second pressure strip is tightly attached to the flexible circuit board body, and the second fixing frame is provided with a first pressure strip inside, the bottom end of the first pressure strip is tightly attached to the flexible circuit board body. The third fixed frame is provided with guide posts at both ends, and tension springs are sleeved on the guide posts. The guide posts extend through both ends of the second fixed frame in a telescopic cooperation manner.
[0005] Preferably, the spacing adjustment plate is in the shape of an inverted U, wherein the inner two ends of the spacing adjustment plate are provided with through guide grooves, and the two sides of the spacing adjustment plate are provided with symmetrically distributed connecting holes. The first fixing frame and the third fixing frame are provided with threaded holes at both ends. The pressure strip inside the first fixing frame and the third fixing frame slides with the guide grooves and is fixedly connected by bolts corresponding to the connecting holes and threaded holes.
[0006] Preferably, the two ends of the third fixing frame are integrally formed with rectangular fixing blocks 1, and the back of the fixing blocks 1 is fixed with guide posts. The two ends of the first fixing frame are integrally formed with rectangular fixing blocks 3, wherein the end of the guide posts extends into the interior of the fixing blocks 3, and the tension spring is located between the fixing blocks 1 and the fixing blocks 3.
[0007] Preferably, the third fixing frame has symmetrically distributed fixing holes, a fixing rod is inserted inside the fixing hole, a fixing spring is provided on the bottom inner side of the fixing rod, and a second pressure strip is provided between the third fixing frame and the pressure strip, wherein the bottom end of the fixing rod is inserted into the top end of the second pressure strip for fixing, and the bottom end of the second pressure strip is tightly attached to the flexible circuit board body.
[0008] Preferably, the pressure strip inside the second fixing frame slides in conjunction with the guide groove, and the two ends of the second fixing frame are integrally formed with rectangular fixing blocks 2, and guide posts are inserted inside the fixing blocks 2, wherein the end of the tension spring is tightly fitted with the front end face of the fixing blocks 2.
[0009] Preferably, the second fixing frame has an L-shaped placement groove on the top inner side, and a threaded post at the top of the placement groove. The first pressure strip is placed inside the placement groove, and the threaded post passes through both ends of the first pressure strip. The first pressure strip is fixed to the top of the second fixing frame with a nut, wherein the bottom end of the first pressure strip is tightly fitted with the flexible circuit board body.
[0010] Compared with the prior art, this utility model provides a flexible circuit board serpentine conductor structure with adjustable spacing, which has the following advantages: This adjustable-spacing flexible circuit board serpentine conductor structure utilizes a combination of a first fixed frame, a second fixed frame, a third fixed frame, and a spacing adjustment plate. The tension springs on the guide posts enable flexible adjustment of the spacing between the flexible circuit board components. The second fixed frame slides into the guide groove of the spacing adjustment plate via a pressure bar, and the guide posts further enhance the smooth movement of the second fixed frame during adjustment, preventing the flexible circuit board from shifting or twisting. The multiple pressure structures of the first pressure bar, the second pressure bar, and the pressure-bearing bar, along with the fixing springs and other components, ensure stable conductive contact of the flexible circuit board, preventing poor contact due to adjustment. The overall structure features a robust and reliable connection between the fixed frames and the spacing adjustment plate, efficiently converting the tension spring force into adjustment power, thus improving the structure's practicality and durability. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram showing the structural breakdown of this utility model; Figure 3 This is a schematic diagram of the third fixed frame structure of this utility model.
[0012] In the figure: 1. Flexible circuit board body; 2. First fixing frame; 3. Second fixing frame; 4. First pressure strip; 5. Guide post; 6. Tension spring; 7. Third fixing frame; 8. Second pressure strip; 9. Fixing rod; 10. Fixing spring; 11. Spacing adjustment plate; 12. Guide groove; 13. Pressure strip; 14. Fixing block one; 15. Fixing block two; 16. Placement groove; 17. Fixing block three; 18. Fixing hole. Detailed Implementation
[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0014] Please see Figure 1-3 An adjustable-spacing flexible circuit board serpentine conductor structure includes: Furthermore, the flexible circuit board body 1, the first fixing frame 2, the second fixing frame 3, the third fixing frame 7, and the spacing adjustment plate 11 are provided. The first fixing frame 2 and the third fixing frame 7 are fixedly installed on both sides of the spacing adjustment plate 11, wherein the first fixing frame 2 and the third fixing frame 7 are symmetrically distributed. The second fixing frame 3 is slidably installed inside the spacing adjustment plate 11. The second fixing frame 3 is located between the first fixing frame 2 and the third fixing frame 7 and is slidably engaged. The flexible circuit board body 1 is installed inside the spacing adjustment plate 11, and the flexible circuit board body 1 passes through the first fixing frame 2, the second fixing frame 3, and the third fixing frame 7 respectively. The first fixing frame 2, the second fixing frame 3 and the third fixing frame 7 are respectively provided with pressure strips 13, wherein the flexible circuit board body 1 is located above the pressure strips 13. The third fixing frame 7 is provided with a second pressure strip 8, the bottom end of the second pressure strip 8 is tightly attached to the flexible circuit board body 1. The second fixing frame 3 is provided with a first pressure strip 4, the bottom end of the first pressure strip 4 is tightly attached to the flexible circuit board body 1. The third fixed frame 7 has guide posts 5 at both ends, and tension springs 6 are sleeved on the guide posts 5. The guide posts 5 extend through both ends of the second fixed frame 3 in a telescopic cooperation manner.
[0015] Furthermore, the spacing adjustment plate 11 is inverted U-shaped, with through guide grooves 12 at both ends of the inner side of the spacing adjustment plate 11, and symmetrically distributed connecting holes on both sides of the spacing adjustment plate 11. Threaded holes are provided at both ends of the first fixing frame 2 and the third fixing frame 7. The pressure strips 13 inside the first fixing frame 2 and the third fixing frame 7 slide in cooperation with the guide grooves 12, and are fixedly connected by bolts corresponding to the connecting holes and threaded holes, so as to realize the stable installation and sliding guidance of the first fixing frame 2 and the third fixing frame 7 on the spacing adjustment plate 11, providing a stable frame for the overall structure and ensuring the adjustment foundation.
[0016] Furthermore, the two ends of the third fixing frame 7 are integrally formed with rectangular fixing blocks 14, and the back of the fixing blocks 14 is fixed with guide posts 5. The two ends of the first fixing frame 2 are integrally formed with rectangular fixing blocks 3 17, wherein the end of the guide post 5 extends into the interior of the fixing blocks 3 17, and the tension spring 6 is located between the fixing blocks 14 and the fixing blocks 3 17, forming a basic connection for guidance and elastic adjustment, providing installation space and force support for the tension spring 6, and assisting in spacing adjustment.
[0017] Furthermore, the third fixing frame 7 has symmetrically distributed fixing holes 18, and fixing rods 9 are inserted inside the fixing holes 18. A fixing spring 10 is provided on the inner side of the bottom of the fixing rod 9. A second pressure strip 8 is provided between the third fixing frame 7 and the pressure strip 13. The bottom end of the fixing rod 9 is inserted into the top end of the second pressure strip 8 for fixing, and the bottom end of the second pressure strip 8 is tightly attached to the flexible circuit board body 1. The second pressure strip 8 is fixed and tightly attached to the flexible circuit board body 1 to ensure stable contact of the circuit board at the third fixing frame 7.
[0018] Furthermore, the pressure strip 13 inside the second fixed frame 3 is slidably engaged with the guide groove 12. The two ends of the second fixed frame 3 are integrally formed with rectangular fixed blocks 15. Guide posts 5 are inserted inside the fixed blocks 15. The end of the tension spring 6 is tightly fitted with the front end face of the fixed block 15, so as to realize the sliding of the second fixed frame 3 and transmit the spring force, ensuring that the second fixed frame 3 moves smoothly and participates in the spacing adjustment.
[0019] Furthermore, an L-shaped placement groove 16 is provided on the inner top of the second fixing frame 3. A threaded post is provided at the top of the placement groove 16. The first pressure strip 4 is placed inside the placement groove 16, and the threaded post passes through both ends of the first pressure strip 4. The first pressure strip 4 is fixed to the top of the second fixing frame 3 with the help of nuts. The bottom end of the first pressure strip 4 is tightly attached to the flexible circuit board body 1. Fixing the first pressure strip 4 and making it tightly attached to the flexible circuit board body 1 ensures stable contact of the circuit board at the second fixing frame 3.
[0020] Structural Description: Flexible circuit board body 1: It is the core conductive component, passing through the first fixed frame, the second fixed frame 3 and the third fixed frame 7 in sequence, and undertaking the functions of circuit connection and signal transmission. First fixed frame 2: symmetrically fixed on both sides of the spacing adjustment plate 11 with the third fixed frame 7, and has a pressure strip 13 inside to provide support and fixation for the flexible circuit board body 1; Second fixed frame 3: Located between the first and third fixed frames, it can slide along the spacing adjustment plate 11, and has a first pressure strip 4 on its inner side, which participates in spacing adjustment and fixes the circuit board. First pressure strip 4: Located inside the second fixed frame 3, it is fixed by threaded post and nut, and its bottom end is tightly attached to the flexible circuit board body 1 to ensure stable contact; Guide post 5: Fixed on the fixing block 14 of the third fixing frame 7, passing through the second fixing frame 3, serving as a sliding guide, and for the tension spring 6 to be sleeved. Tension spring 6: It is sleeved on guide post 5, and its two ends are respectively attached to fixed block 14 and fixed block 2 15, providing elastic power for spacing adjustment; The third fixing frame 7 is symmetrically distributed with the first fixing frame 2. It contains a pressure strip 13 and a second pressure strip 8 to fix the circuit board and assist in spacing adjustment. The second pressure strip 8 is located inside the third fixed frame 7 and is fixed by the fixed rod 9 and the fixed spring 10. Its bottom end is tightly attached to the flexible circuit board body 1 to ensure good contact. Fixed rod 9: It is inserted into the fixed hole 18 of the third fixed frame 7, and the bottom end is connected to the second pressure strip 8. It is fixed to the second pressure strip 8 in conjunction with the fixed spring 10. Fixed spring 10: Located on the inner side of the bottom of fixed rod 9, it provides pressure to the second pressure bar 8, so that it fits tightly against the flexible circuit board body 1; Spacing adjustment plate 11: It is in the shape of an inverted U and is the installation base of the overall structure. The first and third fixing frames are fixed on both sides, and the second fixing frame 3 can slide inside. Guide groove 12: It is opened at both ends of the inner side of the spacing adjustment plate 11, so as to allow the pressure strip 13 of each fixed frame to slide and ensure that the fixed frame moves smoothly; Pressure bar 13: Located inside the three fixed frames, the flexible circuit board body 1 is placed on it, and the pressure bar works with it to ensure the stability of the circuit board; Fixed block 14: integrally formed at both ends of the third fixed frame 7, used to fix the guide post 5 and provide force support for the tension spring 6; Fixed block 2 15: integrally formed at both ends of the second fixed frame 3, for the guide post 5 to pass through, and fits against the end of the tension spring 6 to transmit the spring force; Placement slot 16: L-shaped, located on the top inner side of the second fixing frame 3, used to place the first pressure strip 4, which is fixed with the threaded column; Fixed block 3 17: integrally formed at both ends of the first fixed frame 2, allowing the end of the guide post 5 to extend inward, providing installation space for the tension spring 6; Fixing hole 18: Symmetrically opened on the third fixing frame 7, for the fixing rod 9 to pass through, so as to fix the second pressure strip 8.
[0021] Working principle: The flexible circuit board body 1 serves as the core conductive component, passing sequentially through the first fixed frame 2, the second fixed frame 3, and the third fixed frame 7. These three fixed frames form an overall adjustment frame via the spacing adjustment plate 11. The first fixed frame 2 and the third fixed frame 7 are fixed to the connection holes of the spacing adjustment plate 11 by bolts, and the two are symmetrically distributed. The second fixed frame 3 slides between the first fixed frame 2 and the third fixed frame 7 via an internal pressure strip 13 and a guide groove 12 on the inner side of the spacing adjustment plate 11, providing basic space for spacing adjustment. In terms of fixing and applying pressure, each of the three fixing frames is equipped with a pressure strip 13. The flexible circuit board body 1 is placed above the pressure strip 13. The second pressure strip 8 in the third fixing frame 7 is tightly fitted to the bottom end of the flexible circuit board body 1 through the cooperation of the fixing rod 9 and the fixing spring 10. The first pressure strip 4 in the second fixing frame 3 is fixed in the placement groove 16 by the threaded post and nut, and is also in close contact with the circuit board. The multi-pressure structure ensures that the circuit board maintains stable conductive contact during the adjustment process, avoiding poor contact due to displacement. The core power for spacing adjustment comes from Tension spring 6, guide posts 5 are fixed on the fixing blocks 14 at both ends of the third fixing frame 7. The guide posts 5 pass through the fixing blocks 2 15 at both ends of the second fixing frame 3 and extend into the fixing block 3 17 of the first fixing frame 2. Tension spring 6 is sleeved on the guide posts 5, and its two ends are respectively attached to fixing blocks 14 and 2 15. When an external force pushes the second fixing frame 3 to move towards the first fixing frame 2, tension spring 6 is in a compressed state. At this time, the second fixing frame 3 is close to the third fixing frame 7. When tension spring 6 is stretched, the flexible wire subsequently fixed inside the spacing adjustment plate 11... The circuit board body 1 is stretched, thus adjusting the spacing of the flexible circuit board body 1, thereby changing the distance between the second fixed frame 3 and the two side fixed frames. At the same time, the guide groove 12 provides precise guidance for the sliding of the pressure strip 13, ensuring that the second fixed frame 3 remains horizontal and stable during movement, and preventing the circuit board from shifting or twisting. The fixed installation of the first fixed frame 2 and the third fixed frame 7 provides a stable reference for the entire adjustment structure, so that the elastic force of the spring can be efficiently converted into the power for spacing adjustment, ultimately realizing the adaptive adjustment of the spacing of the flexible circuit board serpentine conductors under different working conditions.
[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A flexible circuit board serpentine conductor structure with adjustable spacing, characterized in that, include: The flexible circuit board body (1), the first fixed frame (2), the second fixed frame (3), the third fixed frame (7) and the spacing adjustment plate (11) are fixedly installed on both sides of the spacing adjustment plate (11), wherein the first fixed frame (2) and the third fixed frame (7) are symmetrically distributed. The second fixed frame (3) is slidably installed inside the spacing adjustment plate (11). The second fixed frame (3) is located between the first fixed frame (2) and the third fixed frame (7) and is slidably engaged. The flexible circuit board body (1) is installed inside the spacing adjustment plate (11). The flexible circuit board body (1) passes through the first fixed frame (2), the second fixed frame (3) and the third fixed frame (7) respectively. The first fixing frame (2), the second fixing frame (3) and the third fixing frame (7) are respectively provided with pressure strips (13), wherein the flexible circuit board body (1) is located above the pressure strips (13), the third fixing frame (7) is provided with a second pressure strip (8), the bottom end of the second pressure strip (8) is tightly attached to the flexible circuit board body (1), the second fixing frame (3) is provided with a first pressure strip (4), the bottom end of the first pressure strip (4) is tightly attached to the flexible circuit board body (1); The third fixed frame (7) is provided with guide posts (5) at both ends, and tension springs (6) are sleeved on the guide posts (5). The guide posts (5) extend through both ends of the second fixed frame (3) in a telescopic cooperation.
2. The adjustable-spacing flexible circuit board serpentine conductor structure according to claim 1, characterized in that, The spacing adjustment plate (11) is in the shape of an inverted U. The inner two ends of the spacing adjustment plate (11) are provided with through guide grooves (12). The two sides of the spacing adjustment plate (11) are provided with symmetrically distributed connecting holes. The two ends of the first fixing frame (2) and the third fixing frame (7) are provided with threaded holes. The pressure strip (13) inside the first fixing frame (2) and the third fixing frame (7) slides with the guide groove (12) and is fixedly connected by bolts corresponding to the connecting holes and threaded holes.
3. The adjustable-spacing flexible circuit board serpentine conductor structure according to claim 1, characterized in that, The third fixing frame (7) has rectangular fixing blocks (14) integrally formed at both ends. A guide post (5) is fixed on the back of the fixing block (14). The first fixing frame (2) has rectangular fixing blocks (17) integrally formed at both ends. The end of the guide post (5) extends into the interior of the fixing block (17). The tension spring (6) is located between the fixing block (14) and the fixing block (17).
4. The adjustable-spacing flexible circuit board serpentine conductor structure according to claim 1, characterized in that, The third fixing frame (7) has symmetrically distributed fixing holes (18), and a fixing rod (9) is inserted inside the fixing hole (18). A fixing spring (10) is provided on the inner side of the bottom of the fixing rod (9). A second pressure strip (8) is provided between the third fixing frame (7) and the pressure strip (13). The bottom end of the fixing rod (9) is inserted into the top end of the second pressure strip (8) for fixing, and the bottom end of the second pressure strip (8) is tightly attached to the flexible circuit board body (1).
5. The adjustable-spacing flexible circuit board serpentine conductor structure according to claim 1, characterized in that, The pressure strip (13) inside the second fixed frame (3) slides with the guide groove (12). The two ends of the second fixed frame (3) are integrally formed with rectangular fixed blocks (15). Guide posts (5) are inserted inside the fixed blocks (15). The end of the tension spring (6) is closely attached to the front end face of the fixed blocks (15).
6. The adjustable-spacing flexible circuit board serpentine conductor structure according to claim 5, characterized in that, The second fixing frame (3) has an L-shaped placement groove (16) on the inner side of the top. The top of the placement groove (16) is provided with a threaded post. The first pressure strip (4) is placed inside the placement groove (16), and the threaded post passes through both ends of the first pressure strip (4). The first pressure strip (4) is fixed to the top of the second fixing frame (3) with the help of nuts. The bottom end of the first pressure strip (4) is tightly attached to the flexible circuit board body (1).