A foldable flexible circuit board

Abstract

The utility model relates to flexible circuit board technical field discloses a kind of foldable flexible circuit boards, including circuit board main body, the hollow board is fixedly connected with circuit board main body side wall, the first gear is rotatably connected in the hollow board inside, the hollow block is fixedly connected with one side of the hollow board, the second gear is rotatably connected in the hollow block inside, the second gear is engaged with first gear, the fourth connecting plate is fixedly connected with one side of circuit board main body, the hollow column is fixedly connected with one side of the fourth connecting plate, the spring is arranged in the hollow column inside, ball is arranged in the spring both sides.The utility model in, by hollow board and first gear, drive first gear and second gear engagement, reach the effect that circuit board folds, solve the problem that directly fold using polyester film or polyimide film alone, leading to damage and split, improve security.

Description

Technical Field

[0001] This utility model relates to the field of flexible circuit board technology, and in particular to a foldable flexible circuit board. Background Technology

[0002] Flexible printed circuit boards (FPCBs) are flexible electronic circuit boards, typically made of flexible polyester or polyimide film, with conductive patterns covering their surface for connecting electronic components and transmitting signals. Compared to rigid circuit boards, FPCBs offer better flexibility and bending capabilities, allowing them to adapt to complex assembly spaces and shape requirements. FPCBs are widely used in various electronic products, such as mobile phones, tablets, cameras, and medical devices, to connect electronic components, transmit signals, and implement circuit functions. Their flexibility and thinness give them unique advantages in applications with high space and weight constraints, while also playing a crucial role in improving product reliability and performance.

[0003] Traditional foldable flexible circuit boards typically include a flexible substrate made of soft materials such as polyester film or polyimide film to maintain flexibility and integrity; conductive patterns covering the substrate surface to connect electronic components and transmit signals; fold lines / creases designed in designated areas to allow the board to fold naturally without damaging wires and circuits; support structures to enhance the stability and load-bearing capacity of the folded areas; and connectors to connect the circuit board or other electronic components to ensure reliable signal transmission.

[0004] However, the folding mechanism of traditional foldable flexible circuit boards is relatively simple, usually relying on materials such as polyester film or polyimide film for simple folding. This simple structure has limitations when facing the requirement of multiple folding. Multiple folding may cause material fatigue, cracks or tears in the folded parts, which may damage the wires or interrupt the circuit connection, ultimately leading to circuit board failure or performance degradation. Damage to the folded parts may cause equipment failure, data loss or functional abnormality, affecting the reliability and stability of the equipment, and may even bring safety hazards. Therefore, a foldable flexible circuit board is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a foldable flexible circuit board, which aims to improve the problem of data loss caused by damage to the folded parts of polyester film or polyimide film in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A foldable flexible circuit board includes a circuit board body, a hollow plate fixedly connected to the side wall of the circuit board body, a first gear rotatably connected inside the hollow plate, a hollow block fixedly connected to one side of the hollow plate, a second gear rotatably connected inside the hollow block, the second gear meshing with the first gear, a fourth connecting plate fixedly connected to one side of the circuit board body, a hollow column fixedly connected to one side of the fourth connecting plate, a spring disposed inside the hollow column, ball bearings disposed on both sides of the spring, a third connecting plate fixedly connected to another side wall of the circuit board body, a third fixing plate fixedly connected to the side wall of the third connecting plate, and a protective component disposed on the side wall of the circuit board body.

[0008] As a further description of the above technical solution:

[0009] The protective component includes a protective strip, which is internally and fixedly connected to the outer wall of the circuit board body;

[0010] As a further description of the above technical solution:

[0011] A second fixing plate is fixedly connected to the side wall of the circuit board body, and a second roller is fixedly connected to the side wall of the second fixing plate.

[0012] As a further description of the above technical solution:

[0013] A connecting rod is fixedly connected to the outer wall of the second roller, and a first roller is fixedly connected to the side wall of the connecting rod;

[0014] As a further description of the above technical solution:

[0015] The first roller sidewall is rotatably connected to a first connecting plate, and one side of the first connecting plate is disposed on the sidewall of the circuit board body;

[0016] As a further description of the above technical solution:

[0017] A connector is fixedly connected to one side of the second fixing plate;

[0018] As a further description of the above technical solution:

[0019] The connector has a connecting collar rotatably connected to its outer wall, and a first connecting plate is fixedly connected to the top of the connecting collar.

[0020] As a further description of the above technical solution:

[0021] One of the first rollers has a first fixing plate fixedly connected to its side wall.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the hollow plate and the first gear drive the first gear to mesh with the second gear, thereby achieving the effect of folding the circuit board. This solves the problem of damage and cracking caused by simply using polyester film or polyimide film for direct folding, and improves the safety of a foldable flexible circuit board.

[0024] 2. In this utility model, the first connecting plate is driven to move by the first roller, the connecting rod and the second roller. The cooperation between them achieves the effect of being able to twist, which solves the problem of being unable to bend and thus unable to adapt to various usage environments, and improves the versatility of foldable flexible circuit boards. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a foldable flexible circuit board proposed in this utility model;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 This is a cross-sectional view of a hollow column of a foldable flexible circuit board proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the structure of the side wall of the main body of a foldable flexible circuit board according to the present invention.

[0029] Figure 5 for Figure 4 A cross-sectional view at point B.

[0030] Legend:

[0031] 1. Circuit board body; 2. First fixing plate; 3. Protective strip; 4. First roller; 5. Connecting rod; 6. Second roller; 7. First connecting plate; 8. Second fixing plate; 9. Hollow plate; 10. First gear; 11. Hollow block; 12. Second gear; 13. Ball bearing; 14. Third fixing plate; 15. Spring; 16. Hollow column; 17. Third connecting plate; 18. Fourth connecting plate; 19. Connector; 20. Connecting collar. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1 , Figure 2 and Figure 3 One embodiment of this utility model provides: a foldable flexible circuit board, including a circuit board body 1, a hollow plate 9 fixedly connected to the side wall of the circuit board body 1, a first gear 10 rotatably connected inside the hollow plate 9, a hollow block 11 fixedly connected to one side of the hollow plate 9, a second gear 12 rotatably connected inside the hollow block 11, the second gear 12 meshing with the first gear 10, a fourth connecting plate 18 fixedly connected to one side of the circuit board body 1, a hollow column 16 fixedly connected to one side of the fourth connecting plate 18, a spring 15 disposed inside the hollow column 16, and ball bearings 13 disposed on both sides of the spring 15, and a third connecting plate 17 fixedly connected to the side wall of another circuit board body 1, a third fixing plate 14 fixedly connected to the side wall of the third connecting plate 17. 。

[0034] Specifically, the hollow plate 9 on the side wall is driven to rotate by the force exerted on the circuit board body 1. Then, the rotation of the hollow plate 9 drives the first gear 10 inside to rotate. The first gear 10 and its meshing second gear 12 begin to rotate, transmitting motion through the hollow column 16 fixed to one side of the fourth connecting plate 18. Subsequently, the spring 15 inside the hollow column 16 pushes up the ball bearings 13 on both sides, causing them to move. Finally, the ball bearings 13 can be engaged in the circular notches designed inside the third fixing plate 14, thus achieving a folding effect. This design, through a series of complex and precise mechanical structures, realizes the folding function of the circuit board, providing flexibility and convenience to the system.

[0035] Reference Figure 4 and Figure 5 A second fixing plate 8 is fixedly connected to the side wall of the circuit board body 1. A second roller 6 is fixedly connected to the side wall of the second fixing plate 8. A connecting rod 5 is fixedly connected to the outer wall of the second roller 6. A first roller 4 is fixedly connected to the side wall of the connecting rod 5. A first connecting plate 7 is rotatably connected to the side wall of the first roller 4. One side of the first connecting plate 7 is set on the side wall of the circuit board body 1. A connector 19 is fixedly connected to one side of the second fixing plate 8. A connecting collar 20 is rotatably connected to the outer wall of the connector 19. The first connecting plate 7 is fixedly connected to the top of the connecting collar 20. A first fixing plate 2 is fixedly connected to the side wall of one of the first rollers 4.

[0036] Specifically, when using the foldable flexible circuit board, force is first applied to the main body 1 of the circuit board, driving it to move. This movement is then transmitted to the first fixing plate 2 on the side wall, causing it to rotate. The movement of the first fixing plate 2 is then transmitted to the first roller 4, causing it to rotate. The rotation of the first roller 4 then drives the connecting rod 5 to rotate, which in turn causes the second roller 6 to rotate. Simultaneously, the movement of the side wall of the first roller 4 also causes the first connecting plate 7 to rotate. Subsequently, through the rotation of the second roller 6, the second fixing plate 8 also begins to rotate. Finally, the rotation of the outer wall of the connector 19 drives the connecting collar 20 to rotate, and the first connecting plate 7, fixed to the top of the connecting collar 20, also rotates, thus achieving the bending effect of the flexible circuit board. This complex mechanical structure allows the circuit board to be flexibly bent when needed, providing greater applicability and convenience for applications.

[0037] Reference Figure 1 The circuit board body 1 has a protective component on its side wall. The protective component includes a protective strip 3, which is fixedly connected to the outer wall of the circuit board body 1.

[0038] Specifically, the circuit board is fully protected by the protective strip 3 designed on the outer wall of the circuit board body 1. Firstly, the protective strip 3 acts as a barrier, effectively preventing damage to the circuit board from external objects, moisture, dust, etc., thereby extending its service life. Secondly, the protective strip 3 can absorb some of the impact force when subjected to external impacts, reducing the possibility of damage to the circuit board and improving its stability and reliability. Furthermore, the design of the protective strip 3 not only strengthens the structural strength of the circuit board but also gives it a more aesthetically pleasing appearance, enhancing the overall quality of the product.

[0039] Working principle: When using the foldable flexible circuit board, the circuit board body 1 is first moved by force. Then, the force on the circuit board body 1 causes the first fixing plate 2 on the side wall to rotate. The force on the first fixing plate 2 causes the first roller 4 to rotate. The rotation of the first roller 4 causes the connecting rod 5 on the outer wall to rotate. The rotation of the connecting rod 5 causes the second roller 6 to rotate. Furthermore, the rotation of the side wall of the first roller 4 causes the first connecting plate 7 to rotate. Then, the rotation of the second roller 6 causes the second fixing plate 8 to rotate. Finally, the rotation of the outer wall of the connector 19 causes the connecting collar 20 to rotate, and the first connecting plate 7, which is fixed to the top of the connecting collar 20, to rotate. The circuit board achieves a bendable effect. Due to the force exerted on the circuit board body 1, the hollow plate 9 on the side wall rotates. Subsequently, the rotation of the hollow plate 9 drives the first gear 10 inside to rotate. Then, the first gear 10 rotates on the outer wall of the second gear 12 that meshes with it. Next, the hollow column 16 fixed on one side of the fourth connecting plate 18 rotates. Then, the spring 15 inside the hollow column 16 pushes up the ball bearings 13 on both sides to move. Then, the ball bearings 13 can be locked in the circular notch designed inside the third fixing plate 14, achieving a foldable effect. Finally, the protective strip 3 designed on the outer wall of the circuit board body 1 protects the circuit board.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foldable flexible circuit board, comprising a circuit board body (1), characterized in that: A hollow plate (9) is fixedly connected to the side wall of the circuit board body (1). A first gear (10) is rotatably connected inside the hollow plate (9). A hollow block (11) is fixedly connected to one side of the hollow plate (9). A second gear (12) is rotatably connected inside the hollow block (11). The second gear (12) meshes with the first gear (10). A fourth connecting plate (18) is fixedly connected to one side of the circuit board body (1). A hollow column (16) is fixedly connected to one side of the fourth connecting plate (18). A spring (15) is provided inside the hollow column (16). Ball bearings (13) are provided on both sides of the spring (15). A third connecting plate (17) is fixedly connected to the other side wall of the circuit board body (1). A third fixing plate (14) is fixedly connected to the side wall of the third connecting plate (17). A protective component is provided on the side wall of the circuit board body (1).

2. The foldable flexible circuit board according to claim 1, characterized in that: The protective component includes a protective strip (3), which is internally fixedly connected to the outer wall of the circuit board body (1).

3. The foldable flexible circuit board according to claim 1, characterized in that: The circuit board body (1) is fixedly connected to a second fixing plate (8) on its side wall, and the second fixing plate (8) is fixedly connected to a second roller (6) on its side wall.

4. A foldable flexible circuit board according to claim 3, characterized in that: A connecting rod (5) is fixedly connected to the outer wall of the second roller (6), and a first roller (4) is fixedly connected to the side wall of the connecting rod (5).

5. A foldable flexible circuit board according to claim 4, characterized in that: The first roller (4) is rotatably connected to the side wall of the first connecting plate (7), and one side of the first connecting plate (7) is set on the side wall of the circuit board body (1).

6. A foldable flexible circuit board according to claim 3, characterized in that: A connector (19) is fixedly connected to one side of the second fixing plate (8).

7. A foldable flexible circuit board according to claim 6, characterized in that: The connector (19) is rotatably connected to a connecting collar (20) on its outer wall, and a first connecting plate (7) is fixedly connected to the top of the connecting collar (20).

8. A foldable flexible circuit board according to claim 4, characterized in that: One of the first rollers (4) has a first fixing plate (2) fixedly connected to its side wall.

Images