Take-up mechanism of flexible circuit board and electronic equipment

Abstract

The utility model provides a take-up mechanism of a flexible circuit board and electronic equipment. The take-up mechanism comprises a take-up frame which comprises a first frame body and a second frame body; the two ends of the tensioning shaft are arranged on the first frame body and the second frame body respectively; the first reversing shaft and the second reversing shaft are arranged on the two opposite sides of the tensioning shaft respectively and are parallel to the tensioning shaft; one end of the flexible circuit board is electrically connected with the system end, and the other end of the flexible circuit board bypasses the upper side of the first reversing shaft, then bypasses the lower side of the tensioning shaft, then bypasses the upper side of the second reversing shaft, bypasses the upper side of the rotating shaft cover, extends into the display end and is electrically connected with the display end. The flexible circuit board is wound around the rotating shaft cover or released from the rotating shaft cover, meanwhile, the tensioning shaft ascends and descends to enable the take-up mechanism to pay off or take up, and the flexible circuit board is kept in a tensioned state under the ascending and descending action of the tensioning shaft. The take-up mechanism is simple and practical in structure, low in cost, small in occupied space in the Y direction and high in universality.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic equipment, and in particular relates to a wire-receiving mechanism of a flexible circuit board and electronic equipment with the wire-receiving mechanism. Background Art

[0002] After decades of rapid development, laptop computers have gained rapid popularity. While performance has gradually improved, the appearance has also become thinner and lighter, which has put forward higher and higher requirements for heat dissipation. In order to make the body beautiful, high-end models often adopt a solution without openings on the bottom cover, which makes the air outlet at the hinge end a key position for heat dissipation in laptops. In order to ensure the air output of the air outlet at the hinge end, most current designs use a small-diameter hinge cover solution. Due to insufficient space in a hinge cover that is too small, the display adapter cable and camera adapter cable with thicker wiring harnesses cannot be properly managed and routed out in the hinge cover. The design usually uses a flat and thin flexible circuit board to wrap the outside of the hinge cover to connect to the system end of the laptop, but this wiring method often leads to redundant wiring. Utility Model Content

[0003] In view of the above technical problems existing in the prior art, the embodiments of the utility model provide a wire-receiving mechanism for a flexible circuit board and an electronic device having the wire-receiving mechanism.

[0004] The technical solution adopted in the embodiment of the utility model is: a wire-receiving mechanism of a flexible circuit board, used in an electronic device, wherein the electronic device comprises a display end and a system end rotatably connected by a rotating shaft assembly, and the wire-receiving mechanism comprises:

[0005] A wire take-up frame, comprising a first frame body and a second frame body arranged opposite to each other;

[0006] A tensioning shaft, two ends of which are respectively arranged on the first frame and the second frame, and can be lifted and lowered relative to the first frame and the second frame;

[0007] A first reversing shaft and a second reversing shaft, both ends of which are respectively arranged on the first frame and the second frame, and the first reversing shaft and the second reversing shaft are respectively located on opposite sides of the tensioning shaft and are parallel to the tensioning shaft;

[0008] One end of the flexible circuit board is electrically connected to the system end, and the other end of the flexible circuit board bypasses the first reversing shaft from the upper side of the first reversing shaft and then bypasses the tensioning shaft from the lower side of the tensioning shaft, and then bypasses the second reversing shaft from the upper side of the second reversing shaft and then bypasses the shaft cover of the shaft assembly from the upper side and extends into the display end, and is electrically connected to the display end. When the display end rotates relative to the system end and drives the shaft cover to rotate, the flexible circuit board is wound around the shaft cover or released from the shaft cover, and at the same time, the tensioning shaft rises and falls to allow the take-up mechanism to release or reel in the wire, and the flexible circuit board remains in a tensioned state under the lifting and lowering action of the tensioning shaft.

[0009] In an optional embodiment, guide grooves are respectively provided on the sides of the first frame and the second frame facing each other, and an elastic component is arranged in the guide groove; both ends of the tensioning shaft are respectively arranged in the guide grooves and press against the elastic component; when the display end is rotated to open relative to the system end, the flexible circuit board is wound on the rotating shaft cover, the tensioning shaft rises, the winding mechanism releases the flexible circuit board, and the elastic component is compressed; when the display end is rotated to close relative to the system end, the flexible circuit board is released from the rotating shaft cover, the elastic component applies a downward force to the tensioning shaft, the tensioning shaft moves downward, and the winding mechanism winds up the flexible circuit board.

[0010] In an optional embodiment, the guide groove on the first frame extends to the bottom of the first frame, and the guide groove on the second frame extends to the bottom of the second frame, and the guide grooves are respectively contracted to form closed ends on the sides of the first frame and the second frame facing each other to limit the elastic component from escaping from the guide grooves.

[0011] In an optional embodiment, the tensioning shaft includes a shaft body and shaft heads respectively arranged at both ends of the shaft body, a shaft neck is formed between the shaft body and the shaft head, the shaft head is located in the guide groove, the shaft neck is located in the closing end, and the shaft head has an action plane for pressing against the top end of the elastic component.

[0012] In an optional embodiment, the wire-winding mechanism further includes a cover plate, wherein the cover plates are two and are respectively fixed to the bottom of the first frame and the bottom of the second frame. The cover plate is provided with a convex column extending from the bottom of the guide groove into the guide groove, which is used to limit the distance of the upward movement of the tensioning shaft to control the stroke and elastic force of the elastic component.

[0013] In an optional embodiment, two first positioning holes are provided on a side surface of the first frame body facing the second frame body, and two second positioning holes corresponding to the two first positioning holes are provided on a side surface of the second frame body facing the first frame body; the first reversing shaft and the second reversing shaft have the same structure and respectively include a shaft portion and a first positioning portion and a second positioning portion elastically connected to both ends of the shaft portion, the first positioning portion is provided in the first positioning hole, and the second positioning portion is provided in the second positioning hole.

[0014] In an optional embodiment, both ends of the shaft rod portion are respectively provided with axial holes, a spring is provided in the axial hole, one end of the spring is connected to the bottom of the axial hole, and the other end of the spring is connected to the first positioning portion or the second positioning portion, so that the first positioning portion can be retracted into or extended from the first positioning hole, and the second positioning portion can be retracted into or extended from the second positioning hole.

[0015] In an optional embodiment, the first frame and the second frame have the same structure and are symmetrically arranged, and respectively include a main body and a first convex portion and a second convex portion formed by protruding outward from the middle and lower portions on opposite sides of the main body, respectively, the guide groove is arranged on the main body, the two ends of the first reversing shaft are respectively arranged on the first convex portions of the first frame and the second frame, and the two ends of the second reversing shaft are respectively arranged on the second convex portions of the first frame and the second frame.

[0016] An electronic device comprises a display end, a system end and a rotating shaft assembly for rotatably connecting the display end and the system end, and also comprises a wire-receiving mechanism of the flexible circuit board described in any of the above embodiments.

[0017] In an optional embodiment, the wire taking-up frame of the wire taking-up mechanism is arranged on the upper cover of the system end, and is a split structure or an integrated structure with the upper cover of the system end.

[0018] Compared with the prior art, the beneficial effects of the embodiments of the utility model are: the wire take-up mechanism of the utility model has a simple and practical structure, low cost, small space occupation in the Y direction, can meet the needs of different models, and has strong versatility.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to restrict the present invention.

[0020] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the disclosed embodiments. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0022] Figure 1 It is a three-dimensional diagram of the wire take-up mechanism according to an embodiment of the utility model.

[0023] Figure 2 This is a three-dimensional diagram of the wire take-up mechanism of the embodiment of the utility model without the flexible circuit board.

[0024] Figure 3 It is an exploded view of the wire take-up mechanism of the embodiment of the utility model.

[0025] Figure 4 It is a partial structural schematic diagram of the wire take-up mechanism of an embodiment of the utility model.

[0026] Figure 5 It is a cross-sectional view of the first reversing shaft according to an embodiment of the utility model.

[0027] Figures 6 to 9 They are schematic diagrams of the wire-reeling mechanism of the embodiment of the utility model in different wire-reeling states.

[0028] Fig.10 It is a schematic diagram of the wire take-up mechanism according to an embodiment of the utility model being applied to an electronic device.

[0029] Reference numerals:

[0030] 1-first frame; 11-main body; 12-first convex part; 13-second convex part; 14-guide groove; 141-closing end; 15-first positioning hole; 16-elastic component; 2-second frame; 3-tensioning shaft; 31-shaft body; 32-shaft head; 33-shaft neck; 4-first reversing shaft; 41-shaft rod; 42-shaft hole; 43-spring; 44-first positioning part; 45-second positioning part; 5-second reversing shaft; 6-bottom plate; 7-cover plate; 71-convex column; 8-flexible circuit board; 9-shaft cover; 10-shaft;

[0031] 100-Upper cover. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0035] like Figures 1 to 3 As shown, the embodiment of the utility model provides a wire-receiving mechanism for a flexible circuit board 8. Fig. 9 As shown, the wire-retracting mechanism can be applied to an electronic device, the electronic device includes a display end and a system end rotatably connected by a rotating shaft assembly, the rotating shaft assembly includes two rotating shafts 10 located near both ends of the rotating connection side of the display end and the system end, and a rotating shaft cover 9 located between the two rotating shafts 10 and connected to the two rotating shafts 10 respectively, and the rotating shaft cover 9 can rotate with the rotating shaft 10 when the rotating shaft 10 rotates. The electronic device can be, but is not limited to, a laptop computer. The electronic device is described below by taking a laptop computer as an example.

[0036] Continue to combine Figures 1 to 3The wire-taking mechanism of the embodiment of the utility model comprises a wire-taking frame, a tensioning shaft 3, a first reversing shaft 4 and a second reversing shaft 5. The wire-taking frame comprises a first frame body 1 and a second frame body 2 arranged opposite to each other. The two ends of the tensioning shaft 3 are respectively arranged on the first frame body 1 and the second frame body 2, and can be lifted and lowered relative to the first frame body 1 and the second frame body 2. The two ends of the first reversing shaft 4 and the second reversing shaft 5 are respectively arranged on the first frame body 1 and the second frame body 2, and the first reversing shaft 4 and the second reversing shaft 5 are respectively arranged on the opposite sides of the tensioning shaft 3 and are parallel to the tensioning shaft 3. One end of the flexible circuit board 8 (FPC for short) is electrically connected to the system end, and the other end of the flexible circuit board 8 bypasses the first reversing shaft 4 from the upper side of the first reversing shaft 4 after reversing, and then bypasses the tensioning shaft 3 from the lower side of the tensioning shaft 3, and then bypasses the second reversing shaft 5 from the upper side of the second reversing shaft 5 after reversing, and then bypasses the shaft cover 9 from the upper side of the shaft assembly and extends into the display end, and is electrically connected to the display end. When the display end rotates relative to the system end and drives the shaft cover 9 to rotate, the flexible circuit board 8 is wound around the shaft cover 9 or released from the shaft cover 9, and at the same time, the tensioning shaft 3 rises and falls to make the take-up mechanism release or take up the wire, and the flexible circuit board 8 remains in a tensioned state under the lifting action of the tensioning shaft 3.

[0037] The wire-receiving mechanism of the embodiment of the utility model is reasonably designed, and can release or retract wires as the display terminal is opened or closed, thereby avoiding redundant wires of the flexible circuit board 8. Moreover, the wire-receiving mechanism, as a matching structure of the small-diameter rotating shaft cover 9, can directly process a wire-receiving frame on the housing of the system end, which occupies less space in the Y direction, reduces the design difficulty, and further reduces the cost.

[0038] In some embodiments, Figures 2 to 4 As shown, the first frame 1 and the second frame 2 are provided with guide grooves 14 on the sides facing each other, and an elastic component 16 is arranged in the guide grooves 14. The two ends of the tensioning shaft 3 are respectively arranged in the guide grooves 14, and the two ends of the tensioning shaft 3 are pressed against the elastic component 16 on the sides facing upward. When the display end of the electronic device is rotated and opened relative to the system end, the flexible circuit board 8 is wound on the rotating shaft cover 9, and the winding mechanism releases the flexible circuit board 8, that is, the flexible circuit board 8 in the winding mechanism is pulled out, and at the same time, the flexible circuit board 8 applies a force to the tensioning shaft 3 to make the tensioning shaft 3 rise, and at the same time, the tensioning shaft 3 applies a force to the elastic component 16 to compress the elastic component 16 and accumulate elastic potential energy; when the display end is rotated and closed relative to the system end, the flexible circuit board 8 is released from the rotating shaft cover 9, the elastic component 16 releases the accumulated potential energy and applies a downward force to the tensioning shaft 3, and the tensioning shaft 3 moves downward, so that the winding mechanism rewinds the flexible circuit board 8 to prevent the flexible circuit board 8 from being exposed.

[0039] In some embodiments, Figure 3As shown, the guide groove 14 on the first frame 1 penetrates to the bottom of the first frame 1, and the guide groove 14 on the second frame 2 penetrates to the bottom of the second frame 2. The guide groove 14 shrinks to form a closing opening 141 on the side of the first frame 1 and the second frame 2 facing each other, so as to limit the elastic component 16 from escaping from the guide groove 14. That is, the size of the closing opening 141 in the direction perpendicular to the tensioning shaft 3 is smaller than the size of the main body of the guide groove 14 in the direction perpendicular to the tensioning shaft 3, and the outer size of the elastic component 16 is larger than the size of the closing opening 141 in the direction perpendicular to the tensioning shaft 3, so that the elastic component 16 cannot escape from the side of the guide groove 14. Moreover, the closing opening 141 can also enable the tensioning shaft 3 to move along the two frames. The main body of the guide groove 14 can be cylindrical. The elastic component 16 can be an elastic column or a spring.

[0040] like Figures 1 to 3 As shown, the take-up frame further includes a bottom plate 6, and the first frame body 1 and the second frame body 2 are respectively arranged at opposite ends of the bottom plate 6, and the first frame body 1 and the second frame body 2 are both plate-shaped bodies with opposite and parallel plate surfaces.

[0041] In some embodiments, the combination Figure 3 The tensioning shaft 3 includes a shaft body 31 and shaft heads 32 respectively arranged at both ends of the shaft body 31, a shaft neck 33 is formed between the shaft body 31 and the shaft head 32, the shaft head 32 is located in the guide groove 14, the shaft neck 33 is located in the closing opening 141, and the shaft head 32 has an action plane for pressing against the top of the elastic component 16. The structural design is reasonable, so that the two ends of the tensioning shaft 3 can be limited in the guide groove 14, and can move up and down along the guide groove 14, and maintain good and stable contact with the elastic component 16 during the movement.

[0042] When the internal Z-direction space of the system end of the notebook computer meets the placement of the universal take-up mechanism, the same elastic component 16 often cannot meet the take-up requirements of all flexible circuit boards 8. For designs with a small take-up length, when the display end of the notebook computer is closed (the rotation angle of the display end and the hinge cover 9 is 0°), the compression amount of the elastic component 16 is still large, and the FPC is still under a large tension, which affects the service life of the FPC. In some embodiments, Figure 4 As shown, the take-up mechanism also includes a cover plate 7, which is two and fixed to the bottom of the first frame 1 and the bottom of the second frame 2 respectively. The cover plate 7 is provided with a boss 71 extending from the bottom of the guide groove 14 into the guide groove 14, which is used to limit the upward movement distance of the tensioning shaft 3 to control the stroke and elasticity of the elastic component 16. By adjusting the length of the boss 71, the stroke and elasticity of the elastic component 16 are controlled to protect the FPC. That is, the elastic force of the elastic component 16 is released to drive the tensioning shaft 3 to the lowest position, and the take-up mechanism only pre-tensions the FPC by 1mm. At this time, the tension is minimal, which protects the FPC when closed and extends the service life of the notebook.

[0043] In some embodiments, Figure 3 and Figure 4 As shown, two first positioning holes 15 are provided on one side of the first frame 1 facing the second frame 2, and two second positioning holes corresponding to the two first positioning holes 15 are provided on one side of the second frame 2 facing the first frame 1. The two ends of the first reversing shaft 4 and the two ends of the second reversing shaft 5 are rotatably connected to the corresponding first positioning holes 15 and second positioning holes. Figure 5 As shown, the first reversing shaft 4 and the second reversing shaft 5 have the same structure and respectively include a shaft portion 41 and a first positioning portion 44 and a second positioning portion 45 elastically connected to both ends of the shaft portion 41. The first positioning portion 44 is disposed in the first positioning hole 15, and the second positioning portion 45 is disposed in the second positioning hole. When the positioning portion is subjected to an external force, the positioning portion will compress or shrink the shaft portion 41 toward the shaft portion 41, and can quickly rebound when there is no external force, restoring the original length, so that the two reversing shafts can be conveniently mounted on the two frames.

[0044] Continue to combine Figure 5 , shaft holes 42 are respectively provided at both ends of the shaft rod 41, springs 43 are provided in the shaft holes 42, one end of the spring 43 is connected to the bottom of the shaft hole 42, and the other end of the spring 43 is connected to the first positioning part 44 or the second positioning part 45, so that the first positioning part 44 can be retracted into or extended from the first positioning hole 15, and the second positioning part 45 can be retracted into or extended from the second positioning hole. The structure is simple and reasonable, and it is convenient to assemble the two reversing shafts on the two frames.

[0045] In some embodiments, Figure 1 As shown, the first frame 1 and the second frame 2 have the same structure and are symmetrically arranged. The first frame 1 includes a main body 11 and a first convex portion 12 and a second convex portion 13 formed by the middle and lower portions of the opposite sides of the main body 11 protruding outwards respectively. The guide groove 14 is arranged on the main body 11. The two ends of the first reversing shaft 4 are respectively arranged on the first convex portion 12 of the first frame 1 and the second frame 2, and the two ends of the second reversing shaft 5 are respectively arranged on the second convex portion 13 of the first frame 1 and the second frame 2. The structure is reasonable and the cost can be reduced.

[0046] It should be noted that Figures 1 to 4 All of them are inverted structural diagrams, that is, Figures 1 to 4 The state in the middle is opposite to the direction of the use state when the take-up mechanism is applied to the system end.

[0047] The wire-winding mechanism of the embodiment of the utility model. As a matching structure of the small-diameter rotating shaft cover 9, during processing and manufacturing, the first step is to clarify the diameter size of the small-diameter rotating shaft cover 9 and the rotation opening and closing angle size of the display end (rotating shaft 10) given in the initial design. The diameter of the small-diameter rotating shaft cover 9 is generally 5 to 6 mm. Since the rotating shaft 10 is close to the system end, the opening and closing angle size of the display end is limited, and the maximum opening and closing range is generally between 130° and 150°. According to the above conditions, at the beginning of the design, the specific wire-winding amount of the wire-winding mechanism can be calculated, and the specific wire-winding amount can also be measured by 3D in the modeling software.

[0048] Taking the model with a shaft cover 9 of 5.7 mm in diameter as an example, the opening and closing angle during use is 0° to 130°, and the wire collection amount is: L = a / 360*(2πr), where a is the maximum opening and closing angle value, and r is the radius of the shaft cover 9;

[0049] Substituting the relevant parameters of this model into the calculation, we can get L = 6.5mm

[0050] That is, the minimum take-up amount is 6.5mm. Usually, the take-up mechanism will reserve an extra 1mm of take-up margin to ensure that the take-up mechanism always tightens the FPC, and it can also protect the FPC.

[0051] Yes, L 总 =L 实际 +L 余量 =6.5+1=7.5mm

[0052] The take-up mechanism is placed vertically (the tensioning shaft 3 is placed horizontally) to save the most space in the Y direction, but the Z direction height of the system end must be greater than or equal to the Gap (gap) value reserved between the maximum take-up height and the take-up mechanism and twice the FPC thickness.

[0053] It is known that the total net height in the Z direction of this Huawei model is 7.5mm. 总需 =Z 收紧 +Z Gap +2Z FPC厚度 =1 / 2L 总 +Z Gap +2Z FPC厚度 =0.5*8.5+1+2*0.15=5.55mm

[0054] Then, Z 总净 >Z 总需 The Z-axis height of this model meets the height requirements for vertical placement.

[0055] The Y-direction dimension of the wire-receiving mechanism of the utility model requires a certain amount of clearance to ensure the service life of the FPC while ensuring the necessary structural strength. The total Y-direction length of the wire-receiving mechanism can be 7.6mm, which is only 34.5% of the Y-direction length of the prior art wire-receiving mechanism with a Y-direction length of 22mm. Under the condition of achieving the same wire-receiving effect, the present invention can provide an additional 1296mm for the motherboard of the electronic device with the same X-direction wire-receiving dimension. 2 area.

[0056] The wire-taking mechanism of the utility model can be designed separately relative to the system end of the electronic device. When the wire-taking mechanism is processed separately, locking ears for fixing are designed on the outer sides of the first frame 1 and the second frame 2 of the wire-taking mechanism. Similarly, matching BOSS columns are reserved at the corresponding positions where the wire-taking mechanism needs to be fixed. The wire-taking mechanism can also be directly milled on the CNC (numerical control lathe processing) process according to the needs, or it can be injection molded as a whole with the internal structure of the system end. The utility model has a simple and practical structure and can meet the needs of different models.

[0057] During assembly, the first step is to put the elastic component 16 into the guide groove 14, then press the tensioning shaft 3 along the edge of the guide groove 14, and then cover the cover plate 7 to complete the main assembly process of the wire take-up mechanism. Then put the two reversing shafts between the two frames, and the positioning parts at both ends of the reversing shaft are subjected to the external force applied by the frame, compressing the spring 43 and retracting it into the shaft hole 42 of the shaft part 41. When the two ends of the reversing shaft are aligned with the positioning holes, the positioning parts are free of external force and can quickly rebound to restore the original length, thus completing the clamping and fixing on the frame.

[0058] Combine the following Figures 6 to 9 The working process of the wire taking-up mechanism of the embodiment of the utility model is described as follows:

[0059] When the notebook computer is closed, the display end (shaft 10) is at 0°, and the FPC is not wrapped on the shaft cover 9. Figure 6 State 1 shown;

[0060] When the laptop is turned on, the display terminal drives the shaft 10 to start rotating, and the FPC starts to wrap around the shaft cover 9 as the shaft 10 rotates. At this time, the FPC is subjected to the pulling force brought by the rotation of the shaft cover 9 (pulling force> elastic force of the elastic component), and the elastic component 16 above the tensioning shaft 3 is compressed, and the FPC stored in the take-up mechanism is pulled out and wrapped around the shaft cover 9. Figure 7 State 2 shown;

[0061] This process continues with the rotation of the shaft 10 until it rotates to the designed maximum opening angle, the elastic component 16 above the tensioning shaft 3 is compressed to the limit position, and the stored FPC is completely wrapped on the shaft cover 9, as shown in FIG. Figure 8State 3 shown;

[0062] When the notebook computer is closed after use, the FPC wrapped on the hinge cover 9 begins to separate from the hinge cover 9 as the hinge 10 rotates. At this time, the FPC tension is 0 (elastic force of the elastic component>tension), the elastic component 16 stretches, and the take-up mechanism begins to store the separated FPC. Fig. 9 State 4 shown;

[0063] This process continues with the rotation of the rotating shaft 10 until it rotates to a closed state of 0° and returns to state 1, completing a line-retrieving operation.

[0064] The utility model also provides an electronic device, which includes a display terminal, a system terminal, and a shaft assembly for rotatably connecting the display terminal and the system terminal, and the electronic device also includes a wire collection mechanism of the flexible circuit board 8 in any of the above embodiments. The electronic device of this embodiment does not have a wire redundancy problem in the wire outlet mode while ensuring the air outlet volume at the end of the shaft 10.

[0065] In some embodiments, Fig.10 As shown, the wire take-up mechanism is disposed on the upper cover 100 of the system end of the electronic device. The wire take-up frame of the wire take-up mechanism and the upper cover 100 of the system end can be a separate structure or an integrated structure.

[0066] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. A wire-receiving mechanism for a flexible circuit board, used in an electronic device, wherein the electronic device comprises a display terminal and a system terminal rotatably connected by a rotating shaft assembly, characterized in that: The wire taking-up mechanism comprises: A wire take-up frame, comprising a first frame body and a second frame body arranged opposite to each other; A tensioning shaft, two ends of which are respectively arranged on the first frame and the second frame, and can be lifted and lowered relative to the first frame and the second frame; A first reversing shaft and a second reversing shaft, both ends of which are respectively arranged on the first frame and the second frame, and the first reversing shaft and the second reversing shaft are respectively located on opposite sides of the tensioning shaft and are parallel to the tensioning shaft; One end of the flexible circuit board is electrically connected to the system end, and the other end of the flexible circuit board bypasses the first reversing shaft from the upper side of the first reversing shaft and then bypasses the tensioning shaft from the lower side of the tensioning shaft, and then bypasses the second reversing shaft from the upper side of the second reversing shaft and then bypasses the shaft cover of the shaft assembly from the upper side and extends into the display end, and is electrically connected to the display end. When the display end rotates relative to the system end and drives the shaft cover to rotate, the flexible circuit board is wound around the shaft cover or released from the shaft cover, and at the same time, the tensioning shaft rises and falls to allow the take-up mechanism to release or reel in the wire, and the flexible circuit board remains in a tensioned state under the lifting and lowering action of the tensioning shaft.

2. The wire-taking mechanism for a flexible printed circuit board according to claim 1, characterized in that: The first frame and the second frame are respectively provided with guide grooves on the sides facing each other, and an elastic component is arranged in the guide groove; both ends of the tensioning shaft are respectively arranged in the guide grooves and pressed against the elastic component; when the display end is rotated to open relative to the system end, the flexible circuit board is wound on the rotating shaft cover, the tensioning shaft rises, the take-up mechanism releases the flexible circuit board, and the elastic component is compressed; when the display end is rotated to close relative to the system end, the flexible circuit board is released from the rotating shaft cover, the elastic component applies a downward force to the tensioning shaft, the tensioning shaft moves downward, and the take-up mechanism rewinds the flexible circuit board.

3. The wire-taking mechanism for a flexible printed circuit board according to claim 2, characterized in that: The guide groove on the first frame extends to the bottom of the first frame, and the guide groove on the second frame extends to the bottom of the second frame. The guide grooves are respectively contracted to form closed ends on the sides of the first frame and the second frame facing each other to limit the elastic component from escaping from the guide grooves.

4. The wire-taking mechanism for a flexible printed circuit board according to claim 3, characterized in that: The tensioning shaft includes a shaft body and shaft heads respectively arranged at both ends of the shaft body, a shaft neck is formed between the shaft body and the shaft head, the shaft head is located in the guide groove, the shaft neck is located in the closing end, and the shaft head has an action plane for pressing against the top end of the elastic component.

5. The wire-taking mechanism for a flexible printed circuit board according to claim 3, characterized in that: The wire-winding mechanism also includes a cover plate, which is two and respectively fixed to the bottom of the first frame and the bottom of the second frame. The cover plate is provided with a convex column extending from the bottom of the guide groove into the guide groove, which is used to limit the distance of the tensioning shaft moving upward to control the stroke and elastic force of the elastic component.

6. The wire-taking mechanism for a flexible printed circuit board according to claim 1, characterized in that: Two first positioning holes are provided on one side of the first frame body facing the second frame body, and two second positioning holes are provided on one side of the second frame body facing the first frame body, which correspond to the two first positioning holes respectively; the first reversing shaft and the second reversing shaft have the same structure and respectively include a shaft portion and a first positioning portion and a second positioning portion elastically connected to both ends of the shaft portion, the first positioning portion is provided in the first positioning hole, and the second positioning portion is provided in the second positioning hole.

7. The wire-taking mechanism for a flexible printed circuit board according to claim 6, characterized in that: Axial holes are respectively provided at both ends of the shaft rod portion, and a spring is provided in the shaft hole. One end of the spring is connected to the bottom of the shaft hole, and the other end of the spring is connected to the first positioning portion or the second positioning portion, so that the first positioning portion can be retracted into or extended out of the first positioning hole, and the second positioning portion can be retracted into or extended out of the second positioning hole.

8. The wire-taking mechanism for a flexible printed circuit board according to claim 3, characterized in that: The first frame and the second frame have the same structure and are symmetrically arranged, and respectively include a main body and a first convex portion and a second convex portion formed by protruding outward from the middle and lower portions on opposite sides of the main body, the guide groove is arranged on the main body, the two ends of the first reversing shaft are respectively arranged on the first convex portions of the first frame and the second frame, and the two ends of the second reversing shaft are respectively arranged on the second convex portions of the first frame and the second frame.

9. An electronic device, comprising a display terminal, a system terminal, and a shaft assembly for rotatably connecting the display terminal and the system terminal, characterized in that: The electronic device further comprises a wire-receiving mechanism for the flexible printed circuit board according to any one of claims 1 to 8.

10. The electronic device according to claim 9, characterized in that: The wire taking-up frame of the wire taking-up mechanism is arranged on the upper cover of the system end, and is a split structure or an integrated structure with the upper cover of the system end.

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