Folding mechanism, folding display device and communication equipment

Abstract

A folding mechanism comprises a rotating mechanism, at least one pair of fixed seats respectively located on both sides of the rotating mechanism, and a transmission mechanism connecting the rotating mechanism and the fixed seat, the rotating mechanism is supported on the fixed seat by at least two transmission mechanisms, the rotating mechanism is in a suspended state, the rotating mechanism comprises a pair of main shafts and a pair of gears respectively mounted on the pair of main shafts and meshing with each other, an arc track is provided on the fixed seat, the transmission mechanism comprises a fixed end fixed to the main shaft and a sliding end matched with the arc track, the sliding end is provided with a sliding shaft that can move around the arc track, when the fixed seat is pulled to move relative to it, the transmission mechanism is driven, and then the pair of main shafts are driven to rotate in the opposite direction, and the pair of gears effectively control the balance of the rotation of the pair of main shafts; the application also includes a folding display device and a communication device.

Description

Technical Field

[0001] The present application relates to the field of communication electronics, and in particular to a folding mechanism, a folding display device and a communication device. Background Art

[0002] With the development of folding screen technology, folding screen mobile phones have become a hot technology. Although the folding screen can be bent, it still cannot be bent 180 degrees. The bent part still needs to maintain a certain R angle, otherwise the screen will be damaged. The existing folding methods are divided into inward folding and outward folding, that is, the screen is on the inside or outside after folding. For example, the Mate X released by Huawei is outward folding, but the problem with outward folding is that the screen is exposed and easily scratched by hard objects, and the folding screen is relatively fragile.

[0003] Regardless of whether it is folded outward or inward, the problem that needs to be solved is how to ensure that the bending mechanism adapts to the R angle required by the bending part of the screen when the folding screen is bent. At this time, the inner side of the folding part of the folding screen will be slightly shortened, while the outer side of the folding screen will be slightly extended. At this time, the components close to the folding screen must keep changing synchronously, otherwise the screen will be squeezed and damaged. And ensure that there is support on the back of the folding screen, otherwise the suspended screen will be damaged when pressed by fingers. Summary of the invention

[0004] In view of this, it is necessary to provide a folding mechanism, a folding display device and a communication device, wherein the folding mechanism can make the folding display device fold evenly to protect the relatively fragile folding screen.

[0005] To solve the above technical problems, the present application provides a folding mechanism, including a rotating mechanism, at least one pair of fixed seats respectively located on both sides of the rotating mechanism, and a transmission mechanism connecting the rotating mechanism and the fixed seat, the rotating mechanism is supported on the fixed seat by at least two transmission mechanisms, the rotating mechanism is in a suspended state, the rotating mechanism includes a pair of main shafts and a pair of gears respectively mounted on the pair of main shafts and meshing with each other, an arc track is provided on the fixed seat, the transmission mechanism includes a fixed end fixed to the main shaft and a sliding end cooperating with the arc track, the sliding end is provided with a sliding shaft that can move around the arc track, when the fixed seat is pulled to move relative to each other, the transmission mechanism is driven, and then the pair of main shafts are driven to rotate in the opposite direction, and the pair of gears effectively control the balance of the rotation of the pair of main shafts.

[0006] Preferably, the fixing seat includes a fixing base and a pair of vertical parts extending upward from the fixing base, the arc track is opened in the length direction of the vertical parts, the pair of vertical parts are arranged opposite to each other, and the arc tracks on the pair of vertical parts are arranged symmetrically.

[0007] Preferably, the sliding end of the transmission mechanism is bent at both sides to extend toward the fixing seat to form a pair of extension pieces, and the sliding shaft is fixed after passing through the extension pieces and the arc track so that the sliding shaft can slide in the arc track.

[0008] Preferably, the rotating mechanism also includes a coupling, a first gasket, a second gasket and a spring. The coupling, the first gasket, a pair of gears, the second gasket and a pair of springs are sequentially mounted on the pair of main shafts. The pair of gears are located between the first and second gaskets. The spring provides elastic supporting force to the gears.

[0009] Preferably, the rotating mechanism further comprises a shell, wherein the shell encloses the coupling member, the first gasket, the gear, the second gasket and the spring, and the pair of gears comprises a first end portion and a second end portion extending from both ends of the shell.

[0010] Preferably, each rotating mechanism is correspondingly provided with two pairs of fixing seats and two pairs of transmission mechanisms, and the fixing ends of the transmission mechanisms are respectively fixed to the first and second fixing ends of the pair of main shafts.

[0011] In order to solve the above technical problems, the present application also provides a folding display device, including the above-mentioned folding mechanism, the folding display device also includes a folding plate with a first and a second surface and a folding screen fixed on the second surface of the folding plate, and the fixing seat is fixed on the first surface of the folding plate.

[0012] Preferably, the folding plate includes a first plate portion, a second plate portion and a plurality of strips located between the first plate portion and the second plate portion, the plurality of strips are independent of each other and there is a gap between any two adjacent strips, the first plate portion, the second plate portion and the plurality of strips are connected as a whole, the folding screen includes first and second non-folding areas respectively fixed to the first and second plate portions and a folding area corresponding to the strips, the folding area is separated from the strips and not fixed, the fixing seats are respectively fixed to the first and second plate portions, and the rotating mechanism is suspended on the first surface of the folding plate through the transmission mechanism and the fixing seat support.

[0013] Preferably, when the folding mechanism is in a folded state, the strip parts of the folding plate are combined into an arc-shaped curved portion, the gap between the strips becomes narrower on the side close to the folding screen, and the gap between the strips becomes wider on the side away from the folding screen.

[0014] Preferably, the first and second plate parts and the strip-shaped body of the folding plate are bonded into an integrated structure by glue.

[0015] Preferably, the glue covers the first and second plate parts and the surface of the strip body on one side away from the folding screen, and the glue simultaneously penetrates into the gaps between the strip bodies and between the strip body and the first and second plate parts.

[0016] Preferably, the depth of the glue penetrating into the gap is no more than half of the thickness of the strip body.

[0017] In order to solve the above technical problems, the present application also provides a communication device, including the above-mentioned folding display device.

[0018] The folding display device of the present application controls the balance of the folding process through the setting of the folding mechanism, and adapts the optimal folding path of the folding screen through the arc track of the fixed seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0020] Figures 1 to 13 The following are the drawings of a foldable display device according to the first embodiment of the present application:

[0021] Figure 1 This is a three-dimensional diagram of the foldable display device of this application;

[0022] Figure 2 A top view of the folding plate of this application;

[0023] Figure 3 for Figure 2 A partial enlarged view of the dotted circle A;

[0024] Figure 4 This is a rear view of the middle position of the folding plate of this application;

[0025] Figure 5 This is a schematic diagram of the folding board and folding screen of the present application in the folding process;

[0026] Figure 6 This is a schematic diagram of the folding plate and folding screen of the present application in a folded state;

[0027] Figure 7 for Figure 6 A partial enlarged view of the dotted circle B shown;

[0028] Figure 8 A three-dimensional assembly diagram of the folding mechanism of the present application;

[0029] Fig. 9 This is a three-dimensional exploded view of the folding mechanism of the present application;

[0030] Fig.10 This is a three-dimensional exploded view of the folding mechanism of the present application from another angle;

[0031] Fig.11 A three-dimensional assembly diagram of the rotating mechanism of this application;

[0032] Fig.12 This is a three-dimensional exploded view of the rotating mechanism of this application;

[0033] Fig.13 It is a three-dimensional diagram of the snap-fit ​​assembly of the rotating mechanism of the present application.

[0034] Figures 14 to 22 The accompanying drawings of the second embodiment of this application:

[0035] Fig.14 A three-dimensional assembly diagram of the foldable display device of the present application;

[0036] Fig.15 A three-dimensional diagram of the folding plate and the rotating mechanism of this application;

[0037] Fig.16 for Fig.15 A stereogram of the reverse view shown;

[0038] Fig.17 A three-dimensional combination diagram of the folding plate and the rigid plate of this application;

[0039] Fig.18 A three-dimensional diagram of a support member of the folding mechanism of the present application;

[0040] Fig.19 A three-dimensional diagram of a rotating member of the folding mechanism of the present application;

[0041] Fig. 20 A three-dimensional assembly diagram of the rotating mechanism of this application;

[0042] Fig.21 This is a partial exploded view of the rotating mechanism of this application;

[0043] Fig. 22 This is a three-dimensional exploded view of the rotating mechanism of this application. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0045] See also Figures 1 to 13 Embodiment 1 shown:

[0046] Key References Figure 1 , Figure 5 As shown, the folding display device of the present application includes a folding plate 10, a folding mechanism 20 fixed to a first surface of the folding plate 10, and a folding screen 30 attached to a second surface of the folding plate 10.

[0047] Continue reading Figures 2 to 7 As shown, the folding plate 10 of the present application includes a first plate portion 11 , a second plate portion 12 , and a plurality of strips 13 located between the first plate portion 11 and the second plate portion 12 .

[0048] Key References Figure 3 , Figure 4 As shown, the strip 13 includes a plurality of narrow strips 133 in the middle part, and a plurality of first and second wide strips 131, 132 respectively located on both sides of the narrow strip 133. The strip 13 and the strip 13 and the first and second plate parts 11, 12 are independent of each other, and there is a certain gap, the width of the gap is 0.10-0.12mm, preferably 0.11mm. The width of the narrow strip 133 is between 0.2-0.6mm, preferably 0.4mm, and the thickness is between 0.1-0.4mm, preferably 0.2mm. The width of the first and second wide strips 131, 132 is between 1.2-1.8mm, preferably 1.5mm, and the thickness is the same as that of the narrow strip 133. The plurality of strip bodies 13 are bonded together by glue 134. The glue 134 is located on the first surface of the plurality of strip bodies 13 and forms a certain thickness on the first surface. The thickness of the glue 134 located on the first surface of the strip bodies 13 is about 0.1-0.3 mm. The glue 134 also extends into between the plurality of strip bodies 13. The depth of the glue 134 extending into between the strip bodies 13 is between one third and one half of the thickness of the strip bodies 13.

[0049] Key References Figure 5 As shown, the folding screen 30 is attached to the second surface of the folding plate 10, and the folding screen 30 includes a first non-folding area 31, 32 and a folding area 33 located between the first non-folding area 31, 32, and the first non-folding area 31, 32 is respectively fixed to the first and second plate parts 11, 12 of the folding plate 10, such as by gluing. The folding area 33 corresponds to the position of the strip body 13, and the folding area 33 and the strip body 13 are separated from each other and not fixed.

[0050] When folding, the folding screen 30 has a certain thickness of about 0.5 mm. As the folding screen 30 is bent, the length of the outer arc surface of the folding area 33 of the folding screen 30 will become longer, while the length of the inner arc surface will be compressed and shortened. Although the change in the length of the inner and outer arcs is small, the folding plate 10 must adapt to the change in the length of the inner and outer arcs, otherwise, the folding plate 10 will squeeze the folding screen 30 and damage the folding screen 30.

[0051] Continue reading Figures 5 to 7 As shown, the angle of the strip 13 of the folding plate 10 changes independently during the bending process of the folding screen 30, and the gap between the strips 13 is reduced after folding, and the flexible glue 134 in the gap between the outer arc surfaces of the strips 13 expands to increase the gap to adapt to the change in the length of the outer arc surface of the folding screen 30 without squeezing the outer arc surface of the folding screen 30. Because the narrow strip 133 corresponds to the position of the folding area 33 of the folding screen 30 with the largest folding angle, the narrow strip 133 can produce a smaller change to adapt to the length change caused by the maximum folding angle of the folding area 33.

[0052] Please continue reading Figures 8 to 13 As shown, the folding mechanism 20 includes a fixing seat 21 respectively fixed on the folding plate 10 or other plate-like bodies similar to the folding plate 10, a rotating mechanism, a transmission mechanism 22 connecting the rotating mechanism and the fixing seat 21, and a shell 23 accommodating the rotating mechanism.

[0053] Each fixing seat 21 includes a pair of symmetrically arranged fixing plates, each fixing plate includes a fixing base 211 fixed on the folding plate 10, a vertical portion 212 formed by vertically bending and extending upward from the fixing base 211, and an arc track 213 opened on the vertical portion 212. The movement trajectory of the arc track 213 adapts to the folding trajectory of the folding screen 30.

[0054] Each fixed seat 21 is provided with a transmission mechanism 22, and the transmission mechanism 22 includes a fixed end 224, a sliding end 221 matching the fixed seat 21, an extension piece 222 formed by bending and extending from both sides of the sliding end 221 toward the fixed seat 21, and a sliding shaft 223 passing through the pair of extension pieces 222. During installation, the sliding end 221 is overlapped on the top of the fixed seat 21, and then the sliding shaft 223 passes through the arc track 213 on one side and the hole structure (not numbered) provided on the two extension pieces 222 and the arc track 213 on the other side in sequence. Finally, the free end of the sliding shaft 223 is fixed so that it does not fall off.

[0055] Key References Fig.11 , Fig.12 As shown, the rotating mechanism includes a pair of main shafts 24, a coupling 25 sequentially sleeved and fixed on the main shafts 24, a first gasket 291, gears 26 respectively sleeved on the pair of main shafts 24 and meshing with each other, a second gasket 292, a spring 27 respectively sleeved on the pair of main shafts 24, a third gasket 293, a first rotating control member 28 and a fourth gasket 294.

[0056] The coupling member 25 includes first through holes 251 respectively sleeved on the pair of main shafts 24, and the pair of main shafts 24 of the rotating mechanism can rotate in the first through holes 251. The pair of second through holes 261 of the pair of gears 26 are sleeved on the main shafts 24 and fixed to the main shafts 24 so that the relative positions of the main shafts 24 and the gears 26 are fixed. The spring 27 is pressed between the second gasket 292 and the third gasket 293. The first rotation control member 28 includes a movable member 281 movable in the length direction of the main shaft 24 and a pair of fixed members 282 cooperating with the movable member 281. The first rotation control member 28 is clamped between the third gasket 293 and the fourth gasket 294. After the housing 23 is assembled, the rotating mechanism is covered and fixed, and the first and second free ends 241 and 242 of the pair of main shafts 24 extend out of the two ends of the housing 23 respectively, and the first gasket 291 and the fourth gasket 294 are held against the two ends of the housing 23 and cannot move in the length direction of the main shaft 24. The third gasket 293 is movable relative to the length direction of the main shaft 24.

[0057] The movable member 281 of the first rotation control member 28 is in contact with one end of the spring 27 through the third gasket 293. The movable member 281 includes a main body 2811 provided with two third through holes and a plurality of protrusions extending toward one end of the fixed member 282. The protrusions include a pair of first protrusions 2812 at the upper and lower sides of the pair of main shafts 24, and a pair of second protrusions 2813 and a third protrusion 2814 located at the lateral outer sides of the pair of main shafts 24. The two side edges of one protrusion 2812 of the pair of first protrusions 2812 are vertical wall structures 28121, and the two side edges of the other protrusion 2812 are inclined wall structures 28122. The two side edges of the second protrusion 2813 and the third protrusion 2814 are both inclined wall structures (not numbered). The three pairs of protrusions (the first protrusion 2812, the second protrusion 2813 and the third protrusion 2814) define two pairs of bayonet structures 2815, 2817 and 2816, 2818 on one side of each main shaft 24. The bayonet defines a first bayonet 2815, 2817, which are arranged parallel to each other, and the second bayonet 2816, 2818 are in a straight line.

[0058] Each fixing member 282 includes a cylindrical body 2821 having a fourth through hole 2824 , and a pair of clamping blocks 2822 extending from the cylindrical body 2821 toward one end of the movable member 281 , and two side walls of the pair of clamping blocks 2822 are inclined wall structures.

[0059] Each rotating mechanism corresponds to two pairs of transmission mechanisms 22 and two pairs of fixed seats 21. One pair of fixed seats 21 is fixed to the first plate portion 11 of the folding plate 10 in sequence in the length direction of the main shaft 24, and the other pair of fixed seats 21 is fixed to the second plate portion 12 of the folding plate 10. The transmission mechanism 22 connects the fixed seat 21 and the rotating mechanism. The fixed ends 224 of the four transmission mechanisms 22 are fixedly connected to the first and second free ends 241, 242 of a pair of main shafts 24, so that the relative position of the fixed ends 224 relative to the first and second free ends 241, 242 is fixed. The sliding end 221 of the transmission mechanism 22 is slidably matched with the fixed seat 21 as described above.

[0060] The rotating mechanism is supported by the transmission mechanism 22 and the fixing seat 21 and is suspended above the outer surface of the folding plate 10 without contacting the surface of the folding plate 10. Each folding display device preferably has two sets of folding mechanisms 20 respectively fixed on the folding plate 10 along the same straight line direction. If the length of the folding display device is too long, three or four folding mechanisms 20 can also be selected.

[0061] The specific operating principle of the foldable display device of this embodiment is as follows:

[0062] When the folding screen 30 is folded together with the folding plate 10, the folding area 33 of the folding screen 30 and the strip 13 of the folding plate 10 are bent, and the changes of the strip 13 are as described above and will not be repeated here. The coordinated movement of the folding mechanism 20 is described in detail here. The pair of main shafts 24 rotate in opposite directions with each other, and the gears 26 respectively fixed on the pair of main shafts 24 rotate with the relative reverse rotation of the main shafts. The pair of gears 26 can control the balance of the folding movement to prevent damage to the folding screen 30 due to irregular rotation. During the rotation, the sliding shaft 223 of the transmission mechanism 22 moves in the arc track 213 of the fixed seat 21. The setting of the arc track 213 conforms to the optimal folding path of the folding area 33 of the folding screen 30. When the first rotation control member 28 is in the initial state, the blocks 2822 of the pair of fixed members 282 are respectively engaged in the pair of first bayonet holes 2815, 2817 of the movable member 281. When rotating, the fixed member 282 rotates together with the main shaft 24, and the blocks 2822 follow the inclined wall structure 28122 of the first protruding piece 2812 and the third protruding piece 2813 and then pass over the top of the first protruding piece 2812 and enter the second bayonet holes 2816, 2818, and produce a folding prompt feel or sound; at this time, the movable member 281 compresses the spring 27 backward under the push of the fixed member 282 along the inclined wall structure 28122 to deform the spring 27, and then, the movable member 281 causes the blocks 2822 to enter the second bayonet holes 2816, 2818 under the restoring force of the spring 27. When the folding display device needs to be unfolded, it can be rotated in the reverse direction, which will not be described here. Vertical wall structures 28121 are provided on both sides of one of the first protrusions 2812, so that the foldable display device cannot be rotated in another direction to prevent the device from being damaged due to incorrect rotation.

[0063] The folding plate 10 of the folding display device of this embodiment solves the problem of changes in the arc lengths of the inner arc and the outer arc caused by the folding screen 30 being bent by arranging a plurality of independent and spaced-apart strips 13 in the folding area 33 corresponding to the folding screen 30. The arrangement of the strips 13 can avoid the problem of the folding plate 10 squeezing the outer arc surface of the folding screen 30 due to the change in the bending arc length.

[0064] The folding display device of this embodiment controls the balance of the folding process through the setting of the folding mechanism 20, and adapts the optimal folding path of the folding screen 30 through the arc track 213 of the fixing seat 21. At the same time, the first rotation control member 28 is used to prevent wrong rotation and provide a prompt for folding in place, thereby enhancing the user experience of the product.

[0065] See also Figures 14 to 22 The second embodiment shown;

[0066] See also Fig.14 , Fig.15 , Fig.16 As shown, the folding display device of the second embodiment of the present application includes a folding plate 10, a protective plate 50 fixed on the first surface of the folding plate 10, a folding mechanism 40 fixed on the protective plate 50, a folding screen 30 attached to the second surface of the folding plate 10, and a housing 62 for mounting and covering the folding mechanism 40 and the protective plate 50. The housing 62 is provided with components such as a circuit board.

[0067] The folding plate 10 has been described in detail in the first embodiment and will not be described again here.

[0068] The housing 60 includes a first housing 61 and a second housing 62 , and the first housing 61 and the second housing 62 are foldable.

[0069] Key References Fig.17 As shown, the protective plate 50 includes a first protective plate 51 fixed to the first plate portion 11 of the folding plate 10 as a whole and a second protective plate 52 fixed to the second plate portion 12 as a whole. The thickness of the protective plate 50 is substantially equal to that of the folding plate 10. The first protective plate 51 and the second protective plate 52 are separated from each other independently. The first protective plate 51 forms an upward bending portion 54 near one end of the second protective plate 51, 52 or the second protective plate 52 forms an upward bending portion 54 near one end of the first protective plate 51. The end of the bending portion 54 is located above the end of the second protective plate 52 or the first protective plate 51. A gap 53 is formed below the bending portion. The disconnection point (i.e., the bending portion 54) of the first and second protective plates 51, 52 is located above the narrow strip 133. When folded, the protective plate 50 folds from the position of the bending portion 54, and the first protective plate 51 and the second protective plate 52 do not generate a folding arc surface due to folding, and the arc length will not be reduced to squeeze the folding plate 10. When the folding display device is unfolded, the strips 13 are in contact with the protective plate 50, so that part of the strips 13 will not be suspended in the unfolded state to protect the folding screen 30 and avoid damage to the folding screen 30 due to suspension when the folding screen 30 is clicked.

[0070] The surface of each strip 13 will be fully or partially against the protection plate 50 when in the unfolded state, and the strip 13 corresponding to the gap 53 below the bent portion 54 will also partially against the protection plate 50. The protection plate 50 can be fixed to the folding plate 10 by glue, rivets, etc., and the strip 13 located in the middle of the folding area 33 of the folding screen 30 is not bonded to the protection plate 50. Alternatively, the strips 13 are not bonded to the protection plate 50 as a whole, but are separated and independent.

[0071] Please continue reading Figures 16 to 22 As shown, the folding mechanism 40 includes two pairs of fixing seats 41 respectively fixed on the first and second protection plates 51 and 52, a rotating mechanism, and a transmission mechanism 42 connecting the fixing seats 41 and the rotating mechanism.

[0072] The fixing seat 41 includes a base 411, two side walls 412 extending upward from two sides of the base 411, and a fixing shaft 413 passing through and fixed to the two side walls 412. There is a distance between the fixing shaft 413 and the base 411. The base 411 is provided with a fixing hole 414 to facilitate fixing the base 411 to the protection plate 50 and the folding plate 10.

[0073] The transmission mechanism 42 includes a fixed end 422, a sliding end 423, and a connecting portion 421 connecting the fixed end 422 and the sliding end 423. The sliding end 423 is provided with an arc track 424, and the design of the arc track 424 is similar to the arc track provided on the fixing seat 21 in the first embodiment, so as to meet the optimal folding path of the folding screen 30. The arc track 424 is first placed between the two side walls 412 of the fixing seat 41, and then the fixing shaft 413 passes through the first side wall 412, the arc track 424, and the second side wall 412 and is fixed to the two side walls 412. The arc track 424 moves around the fixing shaft 413.

[0074] The rotating mechanism includes a seat body 45 having a pair of through holes 456, a pair of main shafts 44 inserted in the through holes, a pair of gears 46 sleeved on the main shafts 44, a spring 47, a first gasket 491, a second gasket 492, a second rotating control member 48 installed in the seat body 45 and interfering with the main shaft 44, and a cover body 43 covering the seat body 45.

[0075] The seat body 45 includes a bottom wall 451, a first vertical wall 453 extending upward from the bottom wall 451, a second vertical wall 454, a third vertical wall 455, a first installation space 457 located between the first vertical wall 453 and the second vertical wall 454, and a second installation space 452 located between the second vertical wall 454 and the third vertical wall 455. A partition wall 458 is provided in the middle of the second installation space 452, and the partition wall 458 divides the second installation space 452 into two installation spaces, each of which corresponds to a through hole 456. A protrusion 4521 is provided on the bottom wall 451 of the second installation space 452.

[0076] The first gasket 491, the pair of gears 46, the second gasket 492, and the spring 47 are sequentially sleeved on the pair of main shafts 44 and assembled in the first installation space 457. The first gasket 491 abuts against the first vertical wall 453, the second gasket 492 is located between the gear 46 and the spring 47, and the other end of the spring 47 abuts against the second vertical wall 454.

[0077] The pair of main shafts 44 further include first and second end portions 441, 442 extending from the through hole 456 to the two ends of the seat body 45. The fixed end 422 of the transmission mechanism 42 is fixed to the first and second end portions 441, 442 of the main shaft 44, respectively.

[0078] The second rotation control member 48 includes a plate-like base 481 and an elastic sheet 482 bent from one end of the plate-like base 481. The plate-like base 481 is provided with a hole structure 483 on a protrusion 4521 sleeved on the bottom wall 451 of the second installation space 452. The plate-like base 481 and the elastic sheet 482 are in a "V"-shaped structure, and the bottom of the "V"-shaped structure faces the isolation wall 458. The pair of main shafts 44 are provided with a recessed portion 443 at the position corresponding to the second installation space 457, and the elastic sheet 482 interferes with the position of the recessed portion 443, so that the pair of main shafts 44 can only rotate along the free end of the elastic sheet 482, but cannot rotate toward the bottom of the elastic sheet 482.

[0079] When the folding display device is folded, the shell 60, the folding plate 10, and the protective plate 50 rotate, and the transmission mechanism 42 is driven to move through the fixed seat 41 fixed on the protective plate 50. The arc track 424 moves around the fixed axis 413 and drives the pair of main shafts 44 to rotate in opposite directions. The gear 46 controls the rotation speed of the pair of main shafts 44 to balance to avoid damage to the folding screen 30 due to uneven rotation.

[0080] The folding plate 10 of the folding display device of the second embodiment of the present application is covered with a protective plate 50, and the protective plate 50 is provided with a first and a second protective plate 51, 52 which are independent of each other, and at the disconnection point, any one of the first and the second protective plates 51, 52 is bent at the free end to form a bending portion 54. While ensuring that the protective plate 50 is foldable, in the unfolded state, the folding plate 10 can be fully supported on the protective plate 50 to prevent the folding screen 30 from being suspended in the air and damaged by clicking.

[0081] The folding mechanism 40 has a relatively simpler structure and can achieve better rotational stability. A second rotation control member 48 is cleverly arranged on the folding mechanism 40 to prevent the user from damaging the folding screen by folding in the wrong direction.

[0082] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A folding mechanism, characterized in that: The invention comprises a rotating mechanism, at least one pair of fixed seats respectively located on both sides of the rotating mechanism, and a transmission mechanism connecting the rotating mechanism and the fixed seat, the rotating mechanism is supported on the fixed seat by at least two transmission mechanisms, the rotating mechanism is in a suspended state, the rotating mechanism comprises a pair of main shafts and a pair of gears respectively sleeved on the pair of main shafts and meshing with each other, an arc track is provided on the fixed seat, the transmission mechanism comprises a fixed end fixed to the main shaft and a sliding end matched with the arc track, the sliding end is provided with a sliding shaft that can move around the arc track, when the fixed seat is pulled to move relative to it, the transmission mechanism is driven, and then the pair of main shafts are driven to rotate in the opposite direction, and the pair of gears effectively control the balance of the rotation of the pair of main shafts.

2. The folding mechanism according to claim 1, characterized in that: The fixing seat includes a fixing base and a pair of vertical parts extending upward from the fixing base. The arc track is opened in the length direction of the vertical part. The pair of vertical parts are arranged opposite to each other, and the arc tracks on the pair of vertical parts are arranged symmetrically.

3. The folding mechanism according to claim 2, characterized in that: The sliding end of the transmission mechanism is bent at both sides to extend toward the fixing seat to form a pair of extension pieces. The sliding shaft passes through the extension pieces and the arc track and is fixed thereafter, so that the sliding shaft can slide in the arc track.

4. The folding mechanism according to claim 3, characterized in that: The rotating mechanism also includes a coupling, a first gasket, a second gasket and a spring. The coupling, the first gasket, a pair of gears, the second gasket and a pair of springs are sequentially mounted on the pair of main shafts. The pair of gears are located between the first and second gaskets. The spring provides elastic supporting force to the gears.

5. The folding mechanism according to claim 4, characterized in that: The rotating mechanism further comprises a shell, wherein the shell encloses the coupling member, the first gasket, the gear, the second gasket and the spring. The pair of gears comprises a first end portion and a second end portion extending from two ends of the shell.

6. The folding mechanism according to claim 5, characterized in that: Two pairs of fixing seats and two pairs of transmission mechanisms are correspondingly arranged for each rotating mechanism, and the fixing ends of the transmission mechanisms are respectively fixed to the first and second fixing ends of the pair of main shafts.

7. A foldable display device, characterized in that: It comprises a folding mechanism as described in any one of claims 1-6, the folding display device also comprises a folding plate having a first surface and a second surface and a folding screen fixed on the second surface of the folding plate, and the fixing seat is fixed on the first surface of the folding plate.

8. The foldable display device according to claim 7, wherein: The folding plate includes a first plate portion, a second plate portion and a plurality of strips located between the first plate portion and the second plate portion, the plurality of strips are independent of each other and there is a gap between two adjacent strips, the first plate portion, the second plate portion and the plurality of strips are connected as a whole, the folding screen includes first and second non-folding areas respectively fixed to the first and second plate portions and a folding area corresponding to the strips, the folding area is separated from the strips and not fixed, the fixing seats are respectively fixed to the first and second plate portions, and the rotating mechanism is suspended on the first surface of the folding plate through the transmission mechanism and the fixing seat support.

9. The foldable display device according to claim 8, wherein: When the folding mechanism is in a folded state, the strip parts of the folding plate are combined into an arc-shaped curved part, the gap between the strips on the side close to the folding screen becomes narrower, and the gap between the strips on the side away from the folding screen becomes wider.

10. The foldable display device according to claim 9, wherein: The first and second plate parts of the folding plate and the strip body are bonded into an integrated structure by glue.

11. The foldable display device according to claim 10, wherein: The glue covers the first and second plate parts and the surface of the strip body on one side away from the folding screen, and the glue simultaneously penetrates into the gaps between the strip bodies and between the strip body and the first and second plate parts.

12. The foldable display device according to claim 11, wherein: The depth of the glue penetrating into the gap is no more than half of the thickness of the strip body.

13. A communication device comprising the foldable display device according to claim 7.

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