Flexible circuit board structure resistant to bending damage

Abstract

The utility model relates to the technical field of flexible circuit boards, and particularly discloses a flexible circuit board structure resistant to bending damage, which comprises a flexible circuit board, two sides of the flexible circuit board are respectively and fixedly connected with a bending-resistant strip, the inner wall of the bending-resistant strip is filled with magnetorheological fluid, the inner wall of the bending-resistant strip is provided with an adjusting mechanism convenient for changing the form of the magnetorheological fluid, and the adjusting mechanism is connected with the flexible circuit board. By arranging the adjusting mechanism and the magnetorheological fluid reactor, the distance between the magnet and the magnetorheological fluid reactor can be adjusted, when the magnet is far away from the magnetorheological fluid reactor, the magnetorheological fluid is kept in a liquid state, the flexible circuit board can be kept flexible, and when the magnet is close to the magnetorheological fluid reactor, the magnetorheological fluid can be quickly converted into a solid state from the liquid state under the action of the magnet and acts on the flexible circuit board. According to the mechanism, flexible switching between flexibility and rigidity can be realized, the rigidity can be dynamically adjusted according to actual requirements, the overall performance of the flexible circuit board is not influenced, and the overall practicability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flexible circuit board technical field, concretely is a kind of flexible circuit board structure of bending damage resistance. BACKGROUND

[0002] Flexible circuit board, also known as flexible circuit board, is a kind of printed circuit board made of flexible insulating substrate (such as polyimide or polyester film). It has high reliability and excellent flexibility, can meet the design requirements of smaller and higher density installation, helps to reduce assembly process and enhance reliability.

[0003] In some high-end electronic products, in order to further improve performance and integration, multi-layer circuit board stacking design will be adopted. FPC as the bridge connecting different layers of circuit board needs to be frequently bent and turned between different layers to realize signal transmission and electrical connection between layers, such as the connection FPC between the mainboard and display screen of notebook computer, however, users are prone to cause some accidental extrusion and impact on electronic products during use and storage, which causes FPC to bear greater bending force, thereby increasing its bending frequency and degree, and problems such as circuit breakage and insulating layer damage are prone to occur during these frequent bending processes, resulting in equipment failure. Therefore, we propose a kind of flexible circuit board structure of bending damage resistance. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of flexible circuit board structure of bending damage resistance to solve the problems that the flexibility of flexible circuit board is sacrificed while improving bending resistance in the above background technology, it is difficult to balance both, and many high-performance bending designs, such as multi-layer structure, special structure, increase the manufacturing difficulty and cost problem.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of flexible circuit board structure of bending damage resistance, comprising: flexible circuit board, the both sides of flexible circuit board are fixedly connected with bending resistance strip, the inner wall of bending resistance strip is filled with magnetorheological fluid, the inner wall of bending resistance strip is equipped with the adjusting mechanism for the convenience of changing the form of magnetorheological fluid.

[0006] Among them, adjusting mechanism includes the first telescopic rod located at the both ends of bending resistance strip, the first telescopic rod is fixedly connected with the end of bending resistance strip, and the inner wall of the upper end of the first telescopic rod is equipped with telescopic piece.

[0007] Among them, telescopic piece includes the second telescopic rod, the second telescopic rod is slidably connected with the inner wall of the upper end of the first telescopic rod, the inner wall of the upper end of the second telescopic rod is slidably connected with the third telescopic rod, and the inner wall of the upper end of the third telescopic rod is slidably connected with the fourth telescopic rod.

[0008] The outer wall of the first telescopic rod, the second telescopic rod, the third telescopic rod and the fourth telescopic rod is provided with a through hole.

[0009] The inner wall of the through hole is provided with an adjusting rod, two adjusting rods are fixedly connected with a fixed plate, and the bottom of the fixed plate is fixedly connected with a magnet.

[0010] The magnet is provided with a plurality of magnets, which are equidistantly distributed on the bottom of the fixed plate.

[0011] The utility model at least has the following beneficial effects:

[0012] The adjusting mechanism and the magnetorheological liquid reactor are arranged, the distance between the magnet and the magnetorheological liquid reactor can be adjusted, when the distance is far, the magnetorheological liquid keeps liquid state, the flexible circuit board can keep flexibility, when the distance is close, the magnetorheological liquid can quickly change from liquid state to solid state under the action of the magnet, and the flexible circuit board is acted on, rigidity enhancement is realized, the flexible and rigid flexible switching can be realized by this mechanism, rigidity can be dynamically adjusted according to actual demand, the overall performance of the flexible circuit board is not affected, and the overall practicability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the overall structure expansion state schematic diagram of the utility model;

[0014] Fig. 2 It is the utility model adjusting mechanism and telescopic piece's enlarged view;

[0015] Fig. 3 It is the structure schematic diagram of the utility model anti-bending strip.

[0016] In the drawing: 1, flexible circuit board;2, anti-bending strip;21, magnetorheological liquid;3, adjusting mechanism;31, first telescopic column;32, second telescopic column;33, third telescopic column;34, fourth telescopic column;35, through hole;36, adjusting rod;37, fixed plate;38, telescopic piece;4, magnet. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] Embodiment one

[0019] Please refer to Figs. 1 to 3The utility model provides a technical scheme: a flexible circuit board structure of anti bending damage, it is characterized in being as follows: the both sides of flexible circuit board 1 are fixedly connected with anti bending strip 2 respectively, and the inner wall of anti bending strip 2 is filled with magnetorheological fluid 21, and the inner wall of anti bending strip 2 is equipped with the adjusting mechanism 3 of the magnetorheological fluid form of being convenient to change, and the adjusting mechanism 3 includes the first telescopic link 31 at the both ends of anti bending strip 2 respectively, and the first telescopic link 31 is fixedly connected with the end of anti bending strip 2, and the inner wall of the upper end of first telescopic link 31 is equipped with telescopic piece 38, and telescopic piece 38 includes the second telescopic link 32, and the second telescopic link 32 is slidably connected with the inner wall of the upper end of first telescopic link 31, and the inner wall of the upper end of second telescopic link 32 is slidably connected with the third telescopic link 33, and the inner wall of the upper end of third telescopic link 33 is slidably connected with the fourth telescopic link 34, and the outer wall of first telescopic link 31, second telescopic link 32, third telescopic link 33, fourth telescopic link 34 is all set with through-hole 35, and the inner wall of through-hole 35 is installed with adjusting rod 36, and the fixed plate 37 is fixedly connected between two adjusting rods 36, and the bottom of fixed plate 37 is fixedly connected with magnet 4.

[0020] Magnetorheological fluid 21 is a kind of intelligent materials, under the action of magnetic field, can quickly, reversibly change the rheological property of itself, generally by iron, cobalt, nickel and other ferromagnetic materials or its alloy is made into small particle, particle size is generally micron level.These magnetic particles are the key factor that magnetorheological fluid can respond to magnetic field, under the action of magnetic field, they will magnetize and interact, to change the macro mechanics performance of magnetorheological fluid.

[0021] Magnetorheological fluid principle: when there is no magnetic field, magnetic particles are randomly dispersed in carrier liquid, fluid shows Newtonian fluid characteristics, low viscosity, good flowability;When magnetic field is applied, magnetic particles are magnetized under the action of magnetic field, and are arranged into chain or column structure along the direction of magnetic field.This structure increases the internal resistance of fluid, and its viscosity increases significantly, even shows the characteristics similar to solid.

[0022] In use, when the flexible circuit board 1 is bent, the adjusting rod 36 is pulled out, the fixed plate 37 is adjusted downward, the fixed plate 37 is also made of rubber material, and can be bent along with the bending of the flexible circuit board 1, the magnet 4 below the fixed plate 37 is close to the magnetorheological fluid 2, then the adjusting rod 36 is fixed at the through hole 35 of the first telescopic column 31, so that the magnetorheological fluid 2 can quickly change from liquid state to solid state under the action of the magnet 4, and acts on the flexible circuit board 1, so that the stiffness is enhanced, and the bending resistance effect of the flexible circuit board 1 is achieved when the flexible circuit board 1 is subjected to external force, the adjusting rod 36 is pulled out, the position of the fixed plate 37 is adjusted upward, then the adjusting rod 36 is fixed at the through hole 35 of the fourth telescopic rod 34, so that the magnetorheological fluid 2 remains in liquid state, and the flexibility of the flexible circuit board 1 is maintained, the flexible and rigid flexible switching mechanism can dynamically adjust the stiffness according to actual needs, does not affect the overall performance of the flexible circuit board, and improves the overall practicability.

[0023] Embodiment two

[0024] In the second embodiment, other structures are unchanged, and different from the first embodiment, the magnet 4 is provided with a plurality of magnets, and is equidistantly distributed at the bottom of the fixed plate 37, the reaction effect of the magnetorheological fluid 2 is more obvious by arranging the plurality of magnets 4 to increase the magnetic field.

[0025] It should be noted that in this document, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0026] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A flexible wiring board structure resistant to bending damage, comprising: Flexible circuit board (1), it is characterized in following: two sides of the flexible circuit board (1) are fixedly connected with anti-bending strips (2) respectively, the inner wall of the anti-bending strip (2) is filled with magneto-rheological fluid (21), the inner wall of the anti-bending strip (2) is equipped with adjusting mechanism (3) for facilitating the form of magneto-rheological fluid (21) is changed.

2. The flexible wiring board structure resistant to bending damage according to claim 1, characterized by: The adjusting mechanism (3) includes first telescopic rods (31) located at both ends of the anti-bending strip (2) respectively, the first telescopic rod (31) is fixedly connected with the end of the anti-bending strip (2), the inner wall of the upper end of the first telescopic rod (31) is equipped with telescopic pieces (38).

3. The flexible wiring board structure resistant to bending damage according to claim 2, characterized by: The telescopic piece (38) includes a second telescopic rod (32), the second telescopic rod (32) is slidably connected with the inner wall of the upper end of the first telescopic rod (31), the upper end of the inner wall of the second telescopic rod (32) is slidably connected with a third telescopic rod (33), the upper end of the inner wall of the third telescopic rod (33) is slidably connected with a fourth telescopic rod (34).

4. The flexible wiring board structure according to claim 3, wherein: The outer wall of the first telescopic rod (31), the second telescopic rod (32), the third telescopic rod (33) and the fourth telescopic rod (34) is all provided with a through hole (35).

5. The flexible wiring board structure according to claim 4, wherein: The inner wall of the through hole (35) is mounted with adjusting rods (36), two adjusting rods (36) are fixedly connected with a fixed plate (37) between them, the bottom of the fixed plate (37) is fixedly connected with magnets (4).

6. The flexible wiring board structure according to claim 5, wherein: The magnets (4) are provided with multiple, and equidistantly distributed at the bottom of the fixed plate (37).

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