Hinge assembly and folding screen terminal

Abstract

This invention belongs to the field of foldable electronic device technology, and relates to a hinge assembly and a foldable screen terminal. The hinge assembly includes a bottom shell, a hinge, and a drive mechanism. The hinge is disposed on the bottom shell and includes a synchronization mechanism and a fixed support structure. The synchronization mechanism includes a first drive shaft, a second drive shaft, a first synchronization block, and a second synchronization block. A first end of the first drive shaft is connected to the first synchronization block, and a first end of the second drive shaft is connected to the second synchronization block. The first synchronization block is provided with a first synchronization gear ring, and the second synchronization block is provided with a second synchronization gear ring that meshes with the first synchronization gear ring. The hinge assembly of this application achieves synchronous rotation of the first and second shells through two sets of gears and racks and two synchronization blocks, saving space occupied by the hinge assembly.

Description

Technical Field

[0001] The present invention belongs to the technical field of foldable electronic devices and relates to a hinge assembly and a foldable screen terminal. Background Art

[0002] With the continuous development of portable electronic devices, the display screens of mobile terminals such as mobile phones and tablets are becoming larger and larger. Although large screens can display more content for users at the same time, they also bring problems such as large size of electronic devices, large space occupied and poor portability, which restricts the development of large-screen portable electronic devices. In order to take into account the dual attributes of portability and large screen of electronic devices, foldable screen electronic products came into being.

[0003] To realize the folding function of the folding screen, in addition to the screen itself, the design of the connecting components for folding, that is, the hinge components at the bend, is also a major technical challenge.

[0004] During the folding process of the folding screen, we must not only consider protecting the screen, but also ensure that there are no bulges when bending.

[0005] In addition, how to reduce the space occupied by the shaft assembly is also a design problem. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a rotating shaft assembly to reduce the space occupied by the rotating shaft assembly.

[0007] In order to solve the above technical problems, the present invention provides a rotating shaft assembly. The folding screen rotating shaft assembly includes a bottom shell, a rotating shaft hinge and a driving mechanism, wherein the rotating shaft hinge is arranged in the bottom shell, and the rotating shaft hinge includes a synchronization mechanism and a fixed support structure;

[0008] The synchronization mechanism comprises a first transmission shaft, a second transmission shaft, a first synchronization block and a second synchronization block, wherein the first end of the first transmission shaft is connected to the first synchronization block, the first end of the second transmission shaft is connected to the second synchronization block, the first synchronization block is provided with a first synchronization ring gear, and the second synchronization block is provided with a second synchronization ring gear meshing with the first synchronization ring gear;

[0009] The fixed support structure includes a first base and a second base, the first base and the second base are fixed on the bottom shell, the first synchronization block is rotatably connected to the first base, the second synchronization block is rotatably connected to the second base, the first base is provided with a first rack, the first transmission shaft is provided with a first transmission gear meshing with the first rack, the second base is provided with a second rack, and the second transmission shaft is provided with a second transmission gear meshing with the second rack;

[0010] The driving mechanism is used to drive at least one of the first transmission shaft and the second transmission shaft to rotate. When the first transmission shaft rotates, it can translate along the length direction of the first rack through the engagement of the first transmission gear and the first rack. When the second transmission shaft rotates, it can translate along the length direction of the second rack through the engagement of the second transmission gear and the second rack, thereby driving the first synchronization block and the second synchronization block to rotate relative to each other.

[0011] Optionally, the first transmission shaft is parallel to the second transmission shaft, the first rack is perpendicular to the first transmission shaft, and the second rack is perpendicular to the second transmission shaft.

[0012] Optionally, the driving mechanism includes a first driving plate, a second driving plate, a first limiting block and a second limiting block;

[0013] The second end of the first transmission shaft is fixedly connected to the first limit block, and the second end of the second transmission shaft is fixedly connected to the second limit block;

[0014] When the first driving plate rotates, the first limiting block is driven to rotate, thereby driving the first transmission shaft to rotate; when the second driving plate rotates, the second limiting block is driven to rotate, thereby driving the second transmission shaft to rotate.

[0015] Optionally, the first driving plate is provided with a first outer slide bar, the first outer slide bar is provided with a first driving slide groove, the first limiting block comprises a first limiting slider and a first slide plate connected to one end surface of the first limiting slider, one end surface of the first limiting slider abuts against the first outer slide bar, and the first slide plate is slidably inserted in the first driving slide groove;

[0016] A second outer slide is provided on the second driving plate, a second driving slide groove is provided on the second outer slide, the second limit block includes a second limit slider and a second slide plate connected to one side end face of the second limit slider, one side end face of the second limit slider abuts against the second outer slide, and the second slide plate is slidably inserted in the second driving slide groove.

[0017] Optionally, the fixed support structure further includes a first fixed block and a second fixed block, wherein the first fixed block and the second fixed block are fixed on the bottom shell.

[0018] The first fixed block is provided with a first limiting sliding groove, and the first limiting sliding block is slidably arranged in the first limiting sliding groove. The second fixed block is provided with a second limiting sliding groove, and the second limiting sliding block is slidably arranged in the second limiting sliding groove.

[0019] Optionally, the shaft assembly further includes a support plate fixedly connected to the top of the bottom shell.

[0020] Optionally, a first long sliding hole is provided on the first synchronization block, the first end of the first transmission shaft is slidably inserted in the first long sliding hole, and the length of the cross section of the first long sliding hole is greater than the outer diameter of the first end of the first transmission shaft;

[0021] The second synchronization block is provided with a second long sliding hole, the first end of the second transmission shaft is slidably inserted in the second long sliding hole, and the length of the cross section of the second long sliding hole is greater than the outer diameter of the first end of the second transmission shaft.

[0022] Optionally, a first support block is disposed on the first transmission shaft near the first transmission gear, and a second support block is disposed on the second transmission shaft near the second transmission gear.

[0023] Optionally, a third outer slide bar is disposed on the first driving plate, a first flange is disposed at the end of the third outer slide bar, a fourth outer slide bar is disposed on the second driving plate, a second flange is disposed at the end of the fourth outer slide bar;

[0024] The rotating shaft assembly further includes a first elastic member, a first sliding support block, a second elastic member and a second sliding support block, wherein the first sliding support block includes a first supporting slider and a first curved bottom transmission key connected to one side of the first supporting slider, and the second sliding support block includes a second supporting slider and a second curved bottom transmission key connected to one side of the second supporting slider;

[0025] The first supporting slider is slidably connected to the first base and the first fixed block, the first elastic member is supported between the first base and the first supporting slider, the second supporting slider is slidably connected to the second base and the second fixed block, and the second elastic member is supported between the second base and the second supporting slider;

[0026] When the first driving plate rotates, it drives the third outer sliding bar to rotate, and drives the second sliding support block to slide through the first flange and the curved surface of the second curved bottom transmission key, thereby compressing or releasing the second elastic member; when the second driving plate rotates, it drives the fourth outer sliding bar to rotate, and drives the first sliding support block to slide through the second flange and the curved surface of the first curved bottom transmission key, thereby compressing or releasing the first elastic member.

[0027] Optionally, the bottom shell is provided with a first cavity and a second cavity arranged side by side along its length direction, and two rotating shaft hinges are provided, one of which is accommodated in the first cavity, and the other rotating shaft hinge is accommodated in the second cavity, and the two rotating shaft hinges are symmetrical relative to the connection position of the first cavity and the second cavity;

[0028] There are two driving mechanisms, one of which is used to drive at least one rotation of the first transmission shaft and the second transmission shaft of the rotating shaft hinge accommodated in the first cavity, and the other driving mechanism is used to drive at least one rotation of the first transmission shaft and the second transmission shaft of the rotating shaft hinge accommodated in the second cavity.

[0029] On the other hand, an embodiment of the present invention also provides a folding screen terminal, which includes a first shell, a second shell, a flexible screen and the above-mentioned hinge assembly, the driving mechanism connects the first shell and the second shell, the bottom shell is arranged between the first shell and the second shell, the flexible screen is connected to the first shell and the second shell, and covers the first shell, the hinge assembly and the second shell.

[0030] The rotating shaft assembly and folding screen terminal provided by the embodiment of the present invention, when the first shell and the second shell are rotated, the driving mechanism connected thereto is driven to rotate, and the driving mechanism drives at least one of the first transmission shaft and the second transmission shaft to rotate. When the first transmission shaft rotates, the meshing of the first transmission gear and the first rack can translate along the length direction of the first rack, and when the second transmission shaft rotates, the meshing of the second transmission gear and the second rack can translate along the length direction of the second rack, thereby driving the first synchronization block and the second synchronization block to rotate relative to each other, so that the rotation process of the driving mechanism can also be synchronized, and finally the flipping movement of the first shell and the second shell is synchronized, and the flexible screen is driven to fold or unfold, which can meet the bending requirements of 180° in-plane folding. The first shell and the second shell are synchronously flipped by two sets of gears and racks and two synchronization blocks, saving the space occupied by the rotating shaft assembly. At the same time, the folded and unfolded states of the first shell and the second shell can produce a large area difference, effectively increasing the use area of ​​the flexible screen, giving users a better sensory experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of a foldable screen terminal in a flattened state provided by an embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram of a flattened state of a rotating shaft hinge of a rotating shaft assembly provided by an embodiment of the present invention;

[0033] Figure 3 is an exploded schematic diagram of a rotating shaft hinge of a rotating shaft assembly provided in one embodiment of the present invention;

[0034] Figure 4 This is an intention of a fixed support structure of a rotating shaft assembly provided by an embodiment of the present invention;

[0035] Figure 5 is a schematic diagram of a driving mechanism of a rotating shaft assembly provided in one embodiment of the present invention;

[0036] Figure 6 It is an exploded schematic diagram of a synchronization mechanism and a spring assembly of a rotating shaft assembly provided in one embodiment of the present invention;

[0037] Figure 7 is a top view of a synchronization mechanism and a spring assembly of a rotating shaft assembly provided in one embodiment of the present invention;

[0038] Figure 8 It is a schematic diagram of the combination of the driving mechanism and the rotating shaft hinge of the rotating shaft assembly provided by one embodiment of the present invention;

[0039] Fig. 9 is a three-dimensional schematic diagram and a planar cross-sectional view of a folding screen terminal provided by an embodiment of the present invention;

[0040] Fig.10 It is a schematic diagram of assembling a spring assembly and a driving mechanism of a rotating shaft assembly provided by an embodiment of the present invention;

[0041] Fig.11 is a schematic diagram of a closed state of a folding screen terminal provided by an embodiment of the present invention;

[0042] Fig.12 It is a schematic diagram of assembling the spring assembly and the driving mechanism of the rotating shaft assembly provided by the first embodiment of the present invention;

[0043] Fig.13 It is a schematic diagram of the assembly of the spring assembly and the driving mechanism of the rotating shaft assembly provided in the second embodiment of the present invention.

[0044] The reference numerals in the specification are as follows:

[0045] 1. First shell; 2. Second shell; 3. Bottom shell; 4. Rotating hinge; 8. Support plate; 9. Flexible screen;

[0046] 40. Fixed support structure; 410. First fixed block; 420. First base; 430. Second fixed block; 440. Second base; 411. Threaded hole; 412. Positioning hole; 413. First limiting slide groove; 414. First guide slide groove; 421. Accommodating hole; 422. Second guide slide groove; 423. First rack; 431. Threaded hole; 433. Second limiting slide groove; 434. Third guide slide groove; 441. Second rack; 442. Positioning shaft; 443. Positioning hole; 444. Through hole;

[0047] 50. driving mechanism; 501. first driving plate; 502. second driving plate; 51. first outer slide; 511. first driving slide groove; 52. second outer slide; 521. second driving slide groove; 53. third outer slide; 531. first flange; 54. fourth outer slide; 541. second flange; 55. threaded hole; 56. positioning hole; 57. shielding plate; 58. first limit block; 581. first limit slider; 582. first slide plate; 59. second limit block;

[0048] 60. Synchronous mechanism; 61. First synchronous block; 611. First long sliding hole; 612. Center hole; 613. First synchronous ring gear; 62. Second synchronous block; 621. Second long sliding hole; 622. Center hole; 623. Second synchronous ring gear; 63. First transmission shaft; 631. First flat shaft; 632. First transmission gear; 633. First support block; 64. Second transmission shaft; 641. Second flat shaft; 642. Second transmission gear; 643. Second support block;

[0049] 70. Spring assembly; 71. First elastic member; 72. First sliding support block; 73. Second elastic member; 74. Second sliding support block; 721. First positioning hole; 722. First supporting slider; 742. Second supporting slider; 723. First curved bottom transmission key; 743. Second curved bottom transmission key; 741. Second positioning hole. DETAILED DESCRIPTION

[0050] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0051] like Figures 1 to 6 As shown, the rotating shaft assembly provided by the embodiment of the present invention includes a bottom shell 3, a rotating shaft hinge 4 and a driving mechanism 50. The rotating shaft hinge 4 is arranged on the bottom shell 3, and the rotating shaft hinge 4 includes a synchronization mechanism 60 and a fixed support structure.

[0052] The synchronization mechanism 60 includes a first transmission shaft 63, a second transmission shaft 64, a first synchronization block 61 and a second synchronization block 62. The first end of the first transmission shaft 63 is connected to the first synchronization block 61, the first end of the second transmission shaft 64 is connected to the second synchronization block 62, the first synchronization block 61 is provided with a first synchronization ring gear 613, and the second synchronization block 62 is provided with a second synchronization ring gear 623 meshing with the first synchronization ring gear 613.

[0053] The fixed support structure includes a first base 420 and a second base 440, the first base 420 and the second base 440 are fixed on the bottom shell 3, the first synchronization block 61 is rotatably connected to the first base 420, the second synchronization block 62 is rotatably connected to the second base 440, the first base 420 is provided with a first rack 423, the first transmission shaft 63 is provided with a first transmission gear 632 meshing with the first rack 423, the second base 440 is provided with a second rack 441, and the second transmission shaft 64 is provided with a second transmission gear 642 meshing with the second rack 441.

[0054] The driving mechanism 50 is used to drive at least one of the first transmission shaft 63 and the second transmission shaft 64 to rotate. When the first transmission shaft 63 rotates, it can translate along the length direction A of the first rack 423 through the engagement of the first transmission gear 632 and the first rack 423. When the second transmission shaft 64 rotates, it can translate along the length direction B of the second rack 441 through the engagement of the second transmission gear 642 and the second rack 441, thereby driving the first synchronization block 61 and the second synchronization block 62 to rotate relative to each other.

[0055] The first synchronization block 61 and the second synchronization block 62 respectively contain a center hole 612 and a center hole 622. Figure 3 The synchronization block can be rotatably connected to the through hole of the base through the center hole and the shaft. The center holes 612 and 622 are the rotation centers of the first synchronization ring gear 613 and the second synchronization ring gear 623 respectively. The first synchronization ring gear 613 and the second synchronization ring gear 623 can appropriately cut off the protruding parts and retain the broken teeth to avoid the protrusions causing the screen to bulge.

[0056] In one embodiment, if Figure 6 to Figure 7 As shown, the first transmission shaft 63 is parallel to the second transmission shaft 64, the first rack 423 is perpendicular to the first transmission shaft 63, and the second rack 441 is perpendicular to the second transmission shaft 64. The first synchronous block 61 and the second synchronous block 62 are arranged side by side, and the first transmission shaft 63 and the second transmission shaft 64 are respectively located on both sides of the first synchronous block 61 and the second synchronous block 62. The first base 420 and the first base 440 are respectively located on both sides of the first synchronous block 61 and the second synchronous block 62, the first base 420 is located on the side of the first transmission shaft 63 close to the second transmission shaft 64, and the second base 440 is located on the side of the second transmission shaft 64 close to the first transmission shaft 63.

[0057] In one embodiment, the driving mechanism 50 includes a first driving plate 501 , a second driving plate 502 , a first limiting block 58 , and a second limiting block 59 .

[0058] The second end of the first transmission shaft 63 is fixedly connected to the first limit block 58 , and the second end of the second transmission shaft 64 is fixedly connected to the second limit block 59 .

[0059] When the first driving plate 501 rotates, it drives the first limiting block 58 to rotate, thereby driving the first transmission shaft 63 to rotate; when the second driving plate 502 rotates, it drives the second limiting block 59 to rotate, thereby driving the second transmission shaft 64 to rotate.

[0060] When the hinge assembly is applied to a folding screen terminal, the folding screen terminal is provided with a first shell 1 and a second shell 2, the first driving plate 501 is fixed on the first shell 1 of the folding screen terminal, and the second driving plate 502 is fixed on the second shell 2 of the folding screen terminal.

[0061] The first driving plate 501 is provided with a first driving slot 511, and the first limiting block 58 is slidably inserted in the first driving slot 511. The second driving plate 502 is provided with a second driving slot 521, and the second limiting block 59 is slidably inserted in the second driving slot 521.

[0062] In one embodiment, if Figure 5 As shown, a first outer slide bar 51 is provided on the first driving plate 501, a first driving groove 511 is provided on the first outer slide bar 51, the first limiting block 58 includes a first limiting slider 581 and a first slide plate 582 connected to one side end face of the first limiting slider 581, one side end face of the first limiting slider 581 abuts against the first outer slide bar 51, and the first slide plate 582 is slidably inserted in the first driving groove 511.

[0063] A second outer slide bar 52 is provided on the second driving plate 502, and a second driving groove 521 is provided on the second outer slide bar 52. The second limit block 59 includes a second limit slider and a second slide plate connected to one side end face of the second limit slider. One side end face of the second limit slider abuts against the second outer slide bar 52, and the second slide plate is slidably inserted in the second driving groove 521.

[0064] The threaded hole 55 and the positioning hole 56 provided on the driving mechanism 50 can be locked and positioned by screws and positioning pins respectively. When the shaft assembly is applied to a folding screen terminal, the driving mechanism 50 is also provided with a shielding plate 57 for supporting the flexible screen 9 of the folding screen terminal and shielding the screws and positioning pins.

[0065] In one embodiment, the fixed support structure also includes a first fixed block 410 and a second fixed block 430, the first fixed block 410 and the second fixed block 430 are fixed on the bottom shell 3, the first fixed block 410 is provided with a first limiting groove 413, the first limiting slider 581 is slidably set in the first limiting groove 413, the second fixed block 430 is provided with a second limiting groove 433, the second limiting slider is slidably set in the second limiting groove 433.

[0066] A threaded hole 411 is provided on one side of the first fixing block 410 for fixing and screwing with the threaded hole 31 on the bottom shell 3. A first limiting slide groove 413 and two positioning holes 412 are provided on the other side of the first fixing block 410. The first fixing block 410 is also provided with a first guide slide groove 414. Similarly, the second fixing block 430 is provided with a threaded hole 431 and a third guide slide groove 434 at a corresponding position. The first base 420 matched with the first fixing block 410 is provided with a receiving hole 421, and the first base 420 is provided with a second guide slide groove 422 parallel to the first guide slide groove 414. Similarly, the second base 440 is provided with a positioning shaft 442, a positioning hole 443 and a through hole 444, and the through hole 444 and the first base 420 correspond to each other.

[0067] In one embodiment, the hinge assembly further includes a support plate 8 fixedly connected to the top of the bottom shell 3. The support plate 8 plays a shielding role. When the hinge assembly is applied to a folding screen terminal, the support plate 8 also plays a role in supporting the flexible screen 9 when the flexible screen 9 of the folding screen terminal is unfolded.

[0068] In one embodiment, a first long sliding hole 611 is provided on the first synchronization block 61, and the first end of the first transmission shaft 63 is slidably inserted in the first long sliding hole 611, and the length of the cross section of the first long sliding hole 611 is greater than the outer diameter of the first end of the first transmission shaft 63.

[0069] The second synchronization block 62 is provided with a second long sliding hole 621 , in which the first end of the second transmission shaft 64 is slidably inserted, and the length of the cross section of the second long sliding hole 621 is greater than the outer diameter of the first end of the second transmission shaft 64 .

[0070] In one embodiment, if Figures 6 to 8As shown, a first support block 633 is provided on the first transmission shaft 63 near the first transmission gear 632, and a second support block 643 is provided on the second transmission shaft 64 near the second transmission gear 642. The first support block 633 and the second support block 643 are used to support the flexible screen 9 of the folding screen terminal when the folding screen terminal is unfolded. The first support block 633 and the second support block 643 are used to fill the gap left by the rotating shaft assembly at the corresponding position, and can better support the flexible screen 9.

[0071] The second end of the first transmission shaft 63 is provided with a first flattened shaft 631, the first limiting block 58 is provided with a first mounting hole matching the shape of the flattened shaft 631, and the first flattened shaft 631 is interference fitted in the first mounting hole. The second end of the second transmission shaft 64 is provided with a second flattened shaft 641, the second limiting block 59 is provided with a second mounting hole matching the shape of the second flattened shaft 641, and the second flattened shaft 641 is interference fitted in the second mounting hole.

[0072] In one embodiment, if Figures 9 to 11 As shown, a third outer slide bar 53 is disposed on the first driving plate 501 , and a first flange 531 is disposed at the end of the third outer slide bar 53 ; a fourth outer slide bar 54 is disposed on the second driving plate 502 , and a second flange 541 is disposed at the end of the fourth outer slide bar 54 .

[0073] The rotating shaft assembly further includes a first elastic member 71, a first sliding support block 72, a second elastic member 73 and a second sliding support block 74. The first sliding support block 72 includes a first supporting slider 722 and a first curved bottom transmission key 723 connected to one side of the first supporting slider 722. The second sliding support block 74 includes a second supporting slider 742 and a second curved bottom transmission key 743 connected to one side of the second supporting slider 742. The first elastic member 71 and the first sliding support block 72 form a group of spring components 70, and the second elastic member 73 and the second sliding support block 74 form another group of spring components 70. Both sides of the first sliding support block 72 are slidably connected to the first guide slot 414 and the second guide slot, respectively, to achieve sliding guidance of the first sliding support block 72.

[0074] The first supporting slider 722 is slidably connected to the first base 420 and the first fixed block 410, the first elastic member 71 is supported between the first base 420 and the first supporting slider 722, the second supporting slider 742 is slidably connected to the second base 440 and the second fixed block 430, and the second elastic member 73 is supported between the second base 440 and the second supporting slider 742.

[0075] When the hinge assembly is applied to a folding screen terminal, after the first shell 1 and the second shell 2 of the folding screen terminal rotate a certain angle around their respective rotation centers, the first outer slide bar 51 of the driving mechanism 50 rotates a certain angle synchronously, and the first curved bottom transmission key 723 of the first sliding support block 72 will be pushed toward the direction of the first guide slot 414 due to the interference of the first flange 531 on the first outer slide bar 51. When the first sliding support block 72 slides, the first elastic member 71 begins to compress and generate elastic force. Similarly, the second elastic member 73 will also undergo the same changes. The spring force will maintain the motion state of the terminal at the initial stage of the movement, avoid the folding and closing of the folding screen terminal due to other external forces, and better maintain the stability of the folding screen terminal.

[0076] When the first driving plate 501 rotates, it drives the third outer sliding bar 53 to rotate, and drives the second sliding support block 74 to slide through the first flange 531 and the curved surface of the second curved bottom transmission key 743, so as to compress or release the second elastic member 73; when the second driving plate 502 rotates, it drives the fourth outer sliding bar 54 to rotate, and drives the first sliding support block 72 to slide through the second flange 541 and the curved surface of the first curved bottom transmission key 723, so as to compress or release the first elastic member 71.

[0077] In one embodiment, preferably, the first elastic member 71 is a first spring, and the second elastic member 73 is a second spring.

[0078] In one embodiment, the bottom shell 3 is provided with a first cavity and a second cavity arranged side by side along its length direction, and two rotating shaft hinges 4 are provided, one of the rotating shaft hinges 4 is accommodated in the first cavity, and the other rotating shaft hinge 4 is accommodated in the second cavity, and the two rotating shaft hinges 4 are symmetrical with respect to the connection positions of the first cavity and the second cavity.

[0079] The driving mechanisms 50 are provided with two, one of which is used to drive at least one of the first transmission shaft 63 and the second transmission shaft 64 of the rotating shaft hinge 4 accommodated in the first cavity to rotate, and the other driving mechanism 50 is used to drive at least one of the first transmission shaft 63 and the second transmission shaft 64 of the rotating shaft hinge 4 accommodated in the second cavity to rotate.

[0080] In one embodiment, if Fig.12As shown, the first flange 531 can be made thicker. When the folding screen terminal is turned from the unfolded state to the closed state, the second curved bottom transmission key 743 of the spring assembly 70 is pushed by the first flange 531, and the compression amount of the second elastic member 73 continues to reach the maximum value. The first flange 531 can still resist the second curved bottom transmission key 743, and then the second elastic member 73 continues to maintain the current compression length. After the holding force of the folding screen terminal reaches the maximum value during the corresponding rotation process, the holding force will disappear until the folding screen terminal is closed; after the folding screen terminal is turned from the closed state to the unfolded state, the second elastic member 73 will recover from the maximum compression amount to the initial compression amount after the first flange 531 resists the second curved bottom transmission key 743 and then loses contact. During the corresponding rotation process, the holding force will quickly reach the maximum value and then continue to decline, and finally reach the flattened state.

[0081] To achieve the above effect, the first flange 531 may be provided with a concave curved surface, and a convex curved surface may be provided on the second curved bottom transmission key 743. The second sliding support block 74 slides by the interference of the shapes of the concave curved surface and the convex curved surface, so as to compress or release the second elastic member 73, so as to achieve the above change process of the holding force.

[0082] In another embodiment, if Fig.13 As shown, the first flange 531 is thinner and its bottom end is passivated and rounded, and the corresponding top of the second curved bottom transmission key 743 is also passivated and rounded accordingly. When the folding screen terminal is turned from the unfolded state to the closed state, the second curved bottom transmission key 743 of the spring assembly 70 is pushed by the first flange 531, and the compression amount of the second elastic member 73 continues to reach the maximum value. When the drive mechanism 50 deflects close to 90 degrees, the first flange 531 is thinner and disengages from the second curved bottom transmission key 743, and the second elastic member 73 returns to the initial compression amount. After the holding force of the folding screen terminal reaches the maximum value during the corresponding rotation process, the holding force will quickly disappear until it is closed; after the folding screen terminal is changed from a closed state to an unfolded state, the bottom end of the first flange 531 can compress the top end of the second curved bottom transmission key 743 inward, and the second elastic member 73 will increase from the initial compression amount to the maximum compression amount during the pushing process of the driving mechanism 50, and then with the separation of the first flange 531 and the second curved bottom transmission key 743, it will then recover from the maximum compression amount to the initial compression amount. During the corresponding rotation process, the holding force will continue to increase and then continue to decrease, and finally reach a flattened state.

[0083] The use of two sets of spring components provides retention force when the folding screen terminal is turned, enhancing the user's experience of frustration during use.

[0084] In addition, if Figure 1As shown, an embodiment of the present invention also provides a folding screen terminal, which includes a first shell 1, a second shell 2, a flexible screen 9 and the hinge assembly of the above embodiment, the driving mechanism 50 connects the first shell 1 and the second shell 2, the bottom shell 3 is arranged between the first shell 1 and the second shell 2, the flexible screen 9 is connected to the first shell 1 and the second shell 2, and covers the first shell 1, the hinge assembly and the second shell 2.

[0085] When the foldable screen terminal is closed, Fig.10 The flexible screen 9 can form a bending area in the accommodating space between the first shell 1, the second shell 2 and the bottom shell 3, bringing a better bending effect to the corresponding device.

[0086] The folding screen terminal includes but is not limited to mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices and other mobile terminals.

[0087] The working principles of the hinge assembly and the folding screen terminal provided by the embodiments of the present invention are as follows:

[0088] When the user rotates the first shell 1 and the second shell 2, the driving mechanism 50 connected thereto is driven to rotate, so as to drive the first transmission shaft 63 to rotate. The first driving plate 501 of the driving mechanism 50 drives the first transmission shaft 63 to rotate, and the second driving plate 502 of the driving mechanism 50 drives the second transmission shaft 64 to rotate. When the first transmission shaft 63 rotates, the first transmission gear 632 is engaged with the first rack 423 and can be translated along the length direction of the first rack 423. When the second transmission shaft 64 rotates, the second transmission gear 642 is engaged with the second rack 441 and can be translated along the length direction of the second rack 441. The translation of the first transmission shaft 63 causes the first end of the first transmission shaft 63 to be inserted into the first long slide hole 611. The first synchronizing block 61 slides in the center hole 612, thereby driving the first synchronizing block 61 to rotate around the axis of the center hole 612. The translation of the second transmission shaft 64 causes the first end of the second transmission shaft 64 to slide in the second long sliding hole 621, thereby driving the second synchronizing block 62 to rotate. Through the engagement of the first synchronizing ring gear 613 and the second synchronizing ring gear 623, the first synchronizing block 61 and the second synchronizing block 62 rotate relative to each other, so that the rotation process of the first driving plate 501 and the second driving plate 502 can also be synchronized, and finally the flipping movement of the first shell 1 fixedly connected to the first driving plate 501 and the second shell 2 fixedly connected to the second driving plate 502 is synchronized, thereby driving the flexible screen to fold or unfold, which can meet the bending requirements of 180° in-plane folding.

[0089] The first shell and the second shell are turned synchronously by two sets of gear racks and two synchronization blocks, saving the space occupied by the shaft assembly. At the same time, the folded and unfolded states of the first shell and the second shell can produce a large area difference, effectively increasing the use area of ​​the flexible screen and giving users a better sensory experience.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotating shaft assembly, characterized in that: It includes a bottom shell, a rotating shaft hinge and a driving mechanism, wherein the rotating shaft hinge is arranged on the bottom shell, and the rotating shaft hinge includes a synchronization mechanism and a fixed support structure; The synchronization mechanism comprises a first transmission shaft, a second transmission shaft, a first synchronization block and a second synchronization block, wherein the first end of the first transmission shaft is connected to the first synchronization block, the first end of the second transmission shaft is connected to the second synchronization block, the first synchronization block is provided with a first synchronization ring gear, and the second synchronization block is provided with a second synchronization ring gear meshing with the first synchronization ring gear; The fixed support structure includes a first base and a second base, the first base and the second base are fixed on the bottom shell, the first synchronization block is rotatably connected to the first base, the second synchronization block is rotatably connected to the second base, the first base is provided with a first rack, the first transmission shaft is provided with a first transmission gear meshing with the first rack, the second base is provided with a second rack, and the second transmission shaft is provided with a second transmission gear meshing with the second rack; The driving mechanism is used to drive at least one of the first transmission shaft and the second transmission shaft to rotate. When the first transmission shaft rotates, it can be translated along the length direction of the first rack through the engagement of the first transmission gear and the first rack. When the second transmission shaft rotates, it can be translated along the length direction of the second rack through the engagement of the second transmission gear and the second rack, thereby driving the first synchronization block and the second synchronization block to rotate relative to each other.

2. The shaft assembly according to claim 1, characterized in that: The first transmission shaft is parallel to the second transmission shaft, the first rack is perpendicular to the first transmission shaft, and the second rack is perpendicular to the second transmission shaft.

3. The shaft assembly according to claim 1, characterized in that: The driving mechanism comprises a first driving plate, a second driving plate, a first limiting block and a second limiting block; The second end of the first transmission shaft is fixedly connected to the first limit block, and the second end of the second transmission shaft is fixedly connected to the second limit block; When the first driving plate rotates, the first limiting block is driven to rotate, thereby driving the first transmission shaft to rotate; when the second driving plate rotates, the second limiting block is driven to rotate, thereby driving the second transmission shaft to rotate.

4. The shaft assembly according to claim 3, characterized in that: The first driving plate is provided with a first outer slide bar, the first outer slide bar is provided with a first driving slide groove, the first limiting block includes a first limiting slider and a first slide plate connected to one end surface of the first limiting slider, one end surface of the first limiting slider abuts against the first outer slide bar, and the first slide plate is slidably inserted in the first driving slide groove; A second outer slide is provided on the second driving plate, a second driving slide groove is provided on the second outer slide, the second limit block includes a second limit slider and a second slide plate connected to one side end face of the second limit slider, one side end face of the second limit slider abuts against the second outer slide, and the second slide plate is slidably inserted in the second driving slide groove.

5. The shaft assembly according to claim 4, characterized in that: The fixed support structure also includes a first fixed block and a second fixed block, the first fixed block and the second fixed block are fixed on the bottom shell, the first fixed block is provided with a first limiting slide groove, the first limiting slide block is slidably set in the first limiting slide groove, the second fixed block is provided with a second limiting slide groove, and the second limiting slide block is slidably set in the second limiting slide groove.

6. The shaft assembly according to claim 1, characterized in that: The rotating shaft assembly also includes a supporting plate fixedly connected above the bottom shell.

7. The shaft assembly according to claim 1, characterized in that: The first synchronous block is provided with a first long sliding hole, the first end of the first transmission shaft is slidably inserted in the first long sliding hole, and the length of the cross section of the first long sliding hole is greater than the outer diameter of the first end of the first transmission shaft; The second synchronization block is provided with a second long sliding hole, the first end of the second transmission shaft is slidably inserted in the second long sliding hole, and the length of the cross section of the second long sliding hole is greater than the outer diameter of the first end of the second transmission shaft.

8. The shaft assembly according to claim 1, characterized in that: A first support block is disposed on the first transmission shaft close to the first transmission gear, and a second support block is disposed on the second transmission shaft close to the second transmission gear.

9. The shaft assembly according to claim 5, characterized in that: The first driving plate is provided with a third outer slide bar, the end of which is provided with a first flange, the second driving plate is provided with a fourth outer slide bar, the end of which is provided with a second flange; The rotating shaft assembly further includes a first elastic member, a first sliding support block, a second elastic member and a second sliding support block, wherein the first sliding support block includes a first supporting slider and a first curved bottom transmission key connected to one side of the first supporting slider, and the second sliding support block includes a second supporting slider and a second curved bottom transmission key connected to one side of the second supporting slider; The first supporting slider is slidably connected to the first base and the first fixed block, the first elastic member is supported between the first base and the first supporting slider, the second supporting slider is slidably connected to the second base and the second fixed block, and the second elastic member is supported between the second base and the second supporting slider; When the first driving plate rotates, it drives the third outer sliding bar to rotate, and drives the second sliding support block to slide through the first flange and the curved surface of the second curved bottom transmission key, thereby compressing or releasing the second elastic member; when the second driving plate rotates, it drives the fourth outer sliding bar to rotate, and drives the first sliding support block to slide through the second flange and the curved surface of the first curved bottom transmission key, thereby compressing or releasing the first elastic member.

10. The shaft assembly according to any one of claims 1 to 9, characterized in that: The bottom shell is provided with a first cavity and a second cavity arranged side by side along its length direction, and two rotating shaft hinges are provided, one of which is accommodated in the first cavity, and the other is accommodated in the second cavity, and the two rotating shaft hinges are symmetrical relative to the connection position of the first cavity and the second cavity; There are two driving mechanisms, one of which is used to drive at least one rotation of the first transmission shaft and the second transmission shaft of the rotating shaft hinge accommodated in the first cavity, and the other driving mechanism is used to drive at least one rotation of the first transmission shaft and the second transmission shaft of the rotating shaft hinge accommodated in the second cavity.

11. A folding screen terminal, characterized in that: It includes a first shell, a second shell, a flexible screen and the hinge assembly according to any one of claims 1 to 10, the driving mechanism connects the first shell and the second shell, the bottom shell is arranged between the first shell and the second shell, the flexible screen is connected to the first shell and the second shell, and covers the first shell, the hinge assembly and the second shell.

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