A hinge mechanism for folding screen and mobile terminal

Abstract

The present invention relates to a hinge mechanism and a mobile terminal for a folding screen, which has a hinge mounting seat; a plurality of hinge devices are mounted on the hinge mounting seat along its extension direction; the hinge device includes a mounting base, and a left flip assembly and a right flip assembly that are rotatably arranged on the mounting base and form synchronous flipping through an even number of gear sets; the left flip assembly and the right flip assembly are both integrated with sliding compensation and damping rotation. The present invention has a simple structure, high functional integration, and can effectively save installation space; at the same time, it can not only provide a better support effect when the flexible screen is in an unfolded state, but also provide a holding space for the flipping part of the flexible screen after the flexible screen is folded, thereby reducing damage to the flexible screen.

Description

Technical Field

[0001] The present invention relates to the field of electronic equipment, and in particular to a hinge mechanism for a folding screen and a mobile terminal. Background Art

[0002] With the continuous advancement and expansion of technology in the field of mobile terminals, and the advent of the 5G network era, people are becoming more and more dependent on mobile terminals. Nowadays, with the continuous updating of various chat, video and other software, people feel that conventional touch screen phones or tablets are no longer enough, mainly because the size of the screen is limited by the size of the mobile terminal.

[0003] In order to solve this problem, people invented flexible screens and applied them to mobile terminals. Through the folding design, the mobile terminal can not only meet people's requirements in terms of portability, but also expand the screen of the mobile terminal by unfolding when needed. In order to achieve the above requirements, the key lies in whether the design of the hinge mechanism is reasonable. At present, the hinge mechanism of mobile terminals using folding screens can have a complex mechanical structure. In order to achieve synchronous flipping, damping feel, etc. in a limited space, different mechanical components often need to be designed to meet the requirements. At the same time, these mechanical components occupy a large amount of installation space, which increases the folding thickness of the mobile terminal using the folding screen and solves problems such as large frame thickness. At the same time, the existing mobile terminals using folding screens will cause squeezing and stretching of the flexible screen during the folding process. With long-term use, it is easy to be damaged, especially at the folding part of the flexible screen. Summary of the invention

[0004] The first object of the present invention is to provide a hinge mechanism for a folding screen, which has a simple structure, high functional integration, and can effectively save installation space; at the same time, it can not only provide better support effect when the flexible screen is in the unfolded state, but also provide an accommodation space for the flipping part of the flexible screen after the flexible screen is folded, thereby reducing damage to the flexible screen.

[0005] The technical scheme for achieving the first object of the present invention is as follows: the hinge mechanism for the folding screen in the present invention has a hinge mounting seat; a plurality of hinge devices are installed on the hinge mounting seat along its extension direction; the hinge device includes a mounting base, and a left flip assembly and a right flip assembly that are rotatably arranged on the mounting base and form synchronous flipping through an even-numbered gear set; the left flip assembly includes a left turn plate, a left flap and a left damping member; the left turn plate is rotatably connected to the mounting base, and a left slide groove is provided on the left turn plate; one end of the left flap is connected to the gear transmission of one end of the even-numbered gear set, and the other end of the left flap is connected to the left slide groove to form a sliding connection for sliding compensation with the rotation of the left flip assembly; the left damping member includes a first left damping convex tooth arranged on the left flap and coaxially rotating with the left flap, and a second left damping convex tooth that seeks to mesh with the first left damping convex tooth under the action of a left damping spring; as the left flip assembly rotates, the first left damping convex tooth and the second left damping convex tooth form a damped rotation through the distance difference formed in the continuous meshing process;

[0006] The right-side flip assembly includes a right turn plate, a right flap and a right damping member; the right turn plate is rotatably connected to the mounting base, and a right slide groove is provided on the right turn plate; one end of the right flap is connected to the gear transmission of the other end of the even-numbered gear set, and the other end of the right flap is connected to the right slide groove to form a sliding connection for sliding compensation as the right-side flip assembly rotates; the right damping member includes a first right-side damping cam tooth which is arranged on the right flap and rotates coaxially with the right flap, and a second right-side damping cam tooth which seeks to mesh with the first right-side damping cam tooth under the action of a right-side damping spring; as the right-side flip assembly rotates, the first right-side damping cam tooth and the second right-side damping cam tooth form a damped rotation through the distance difference formed during the continuous meshing process.

[0007] Hinge devices are provided at both ends and the middle of the hinge mounting seat; an even-numbered gear set, a left flap, a right flap, a left damping member and a right damping member are symmetrically provided on the front and rear sides of the mounting base of the hinge device in the middle; a left slide groove is symmetrically provided on the front and rear sides of the left turning plate of the hinge device in the middle, and a right slide groove is symmetrically provided on the front and rear sides of the right turning plate of the hinge device in the middle; an even-numbered gear set of the hinge device in the middle includes an even-numbered gears mounted on a retaining frame and drivingly matched with each other, or includes two rotating shafts mounted on a retaining frame;

[0008] When the even-numbered gear set of the hinge device in the middle portion includes an even number of gears mounted on the retaining frame and drivingly matched with each other, the left flap is drivingly connected to the gear at one end of the even-numbered gear set on the corresponding side, and the right flap is drivingly connected to the gear at the other end of the even-numbered gear set on the corresponding side;

[0009] When the even-numbered gear set of the hinge device in the middle includes two rotating shafts installed on the retaining frame, the left flap is connected to the rotating shaft at one end of the even-numbered gear set on the corresponding side, and the right flap is connected to the rotating shaft at the other end of the even-numbered gear set on the corresponding side; this scheme is to reduce the use of gears, because when hinge devices are set at both ends of the hinge mounting seat, the hinge device in the middle does not need to be set to synchronize traditional gears, which can effectively reduce costs;

[0010] The left flap forms a sliding connection with the left slide groove on the corresponding side; the right flap forms a sliding connection with the right slide groove on the corresponding side; each left flap is provided with a left damping member, and each right flap is provided with a right damping member;

[0011] The left damping member and the right damping member of the hinge device located at both ends of the hinge mounting seat are both located on one side of the hinge device close to the middle of the mounting base.

[0012] The left slide groove and the right slide groove are both straight grooves; the part where the left flap is slidably connected to the left slide groove is a straight plate body; the part where the right flap is slidably connected to the right slide groove is also a straight plate body.

[0013] The left flip assembly and the right flip assembly are both provided with a limit assembly for preventing the left flip assembly and the right flip assembly from over-rotating when they are closed.

[0014] The above-mentioned limiting assembly includes a first limiting portion and a second limiting portion; the first limiting portion is respectively provided on the left flap and the right flap; a second limiting portion corresponding to the first limiting portion on the left flap and the first limiting portion on the right flap is respectively provided on the retaining frame of the even-numbered gear set or the hinge mounting seat; when the left flip assembly and the right flip assembly are closed, the second limiting portion contacts the first limiting portion and limits the left flap and the right flap from continuing to close and rotate.

[0015] The left turning plate comprises a first left connecting plate for fixedly connecting to the left supporting middle frame, and a second left connecting plate for fixedly connecting to the left housing; one end of the first left connecting plate is rotatably connected to the mounting base, and the other end is rotatably connected to the second left connecting plate through a rotating shaft; a left sliding groove is provided on the second left connecting plate;

[0016] The right turning plate includes a first right connecting plate for fixedly connecting to the right supporting middle frame, and a second right connecting plate for fixedly connecting to the right housing; one end of the first right connecting plate is rotatably connected to the mounting base, and the other end is rotatably connected to the second right connecting plate through a rotating shaft; a right sliding groove is provided on the second right connecting plate;

[0017] The left supporting middle frame and the right supporting middle frame are used to support the flexible screen.

[0018] A supporting plate for supporting the flexible screen is provided between adjacent hinge devices; the supporting plate is connected to the hinge mounting seat by at least one elastic component; the elastic component includes a reference block, a reset spring and a limit screw; the reference block is fixedly connected to the hinge mounting seat in a detachable manner; a limit through hole is provided on the reference block; an insert is provided at a position on the lower plane of the supporting plate corresponding to the limit through hole, and the insert is provided with an internal threaded hole that matches the thread of the limit screw; a retaining ring that limits the nut of the limit screw from passing through is provided at the upper port portion of the limit through hole; the insert is inserted from the upper end of the through hole of the limit tube and matches the thread of the limit screw; the reset spring is sleeved on the insert, and the two ends of the reset spring act on the nut and the retaining ring of the limit screw respectively;

[0019] A left top block which can rotate with the even-numbered gear set is provided on the output shaft of the gear of the even-numbered gear set which is transmission-connected to the left flap; a right top block which can rotate with the even-numbered gear set is provided on the output shaft of the gear of the even-numbered gear set which is transmission-connected to the right flap; both the left top block and the right top block are provided with a top head for lifting the supporting plate; when the left-side flip assembly and the right-side flip assembly are in full opening, the top heads on the left top block and the right top block will fully lift the supporting plate under the action of the pulling force of the return spring; when the left-side flip assembly and the right-side flip assembly are in full closing, the top heads on the left top block and the right top block will be separated from the supporting plate, and the supporting plate will sink under the action of the return spring.

[0020] A reference block is provided between the left damping member and the right damping member of each hinge device; limit holes are symmetrically provided on the left and right sides of the reference block; the output shaft of the gear of the even-numbered gear group connected to the left flap in transmission sequentially passes through the corresponding first left damping convex tooth, the second left damping convex tooth, the left damping spring, the limit hole and the left top block, and forms a transmission connection with the first left damping convex tooth and the left top block, that is, as the left flap rotates, the first left damping convex tooth, the left top block and the output shaft are driven to rotate, and the output shaft rotates in the second left damping convex tooth, the left damping spring and the limit hole; the two ends of the left damping spring act on the second left damping convex tooth and the corresponding end surface of the limit hole facing the second left damping convex tooth respectively;

[0021] The output shaft of the gear of the even-numbered gear set transmission-connected with the right flap passes through the corresponding first right damping convex tooth, second right damping convex tooth, right damping spring, limiting hole and right top block in sequence, and forms a transmission connection with the first right damping convex tooth and the right top block, that is, as the right flap rotates, the first right damping convex tooth, the right top block and the output shaft are driven to rotate, and the output shaft rotates in the second right damping convex tooth, the right damping spring and the limiting hole; the two ends of the right damping spring act on the second right damping convex tooth and the end surface of the corresponding limiting hole facing the second right damping convex tooth respectively;

[0022] The second left damping protruding tooth and the second right damping protruding tooth on the same side are connected into one by a connecting plate

[0023] The above-mentioned left flap is provided with a left flange extending along the sliding direction of the left flap in the left slide groove; the right flap is provided with a right flange extending along the sliding direction of the right slide groove; the left turning plate is provided with a left buckle for clamping the left flange and limiting the sliding connection of the left flap in the left slide groove; the right turning plate is provided with a right buckle for clamping the right flange and limiting the sliding connection of the right flap in the right slide groove.

[0024] The above-mentioned retaining frame includes a first retaining plate and a second retaining plate arranged opposite to each other; the gears of the even-numbered gear set are located between the first retaining plate and the second retaining plate and are rotatably arranged on the first retaining plate and the second retaining plate; the first retaining plate is fixedly connected to the hinge mounting seat or is a part of the mounting base; the first retaining plate is provided with clamping through holes at the gears at both ends of the even-numbered gear set; the gears at both ends of the even-numbered gear set are provided with output shafts, and the output shaft is located at one end of the first retaining plate and is provided with a clamping head; the clamping through holes include a through hole for the output shaft of the corresponding gear to pass through and form a coaxiality limit, and an avoidance groove for the clamping head to pass through; when the output shafts of the gears at both ends pass through the clamping through holes, the clamping head and the through holes are rotated to form a limit clamping.

[0025] The second object of the present invention is to provide a mobile terminal adopting the above-mentioned hinge structure, which can provide an accommodation space for the folding part of the flexible screen when folded and stored, thereby reducing damage to the folding part of the flexible screen.

[0026] The technical solution for achieving the second purpose of the present invention is: the mobile terminal in the present invention includes the above-mentioned hinge mechanism for folding the screen, a left casing and a right casing; the left casing is fixedly connected to the second left connecting plate, and the right casing is fixedly connected to the second right connecting plate; the inner sides of the left casing and the right casing are respectively installed with a left support plate and a right support plate for supporting the rotation of the flexible screen, and the left support plate and the right support plate are fixedly connected to the flexible screen.

[0027] The present invention has positive effects: (1) The hinge mechanism for the folding screen in the present invention has a simple structure and high functional integration, and can effectively save installation space; it is mainly reflected in that the left flap is connected to the left turn plate by a sliding connection, which realizes sliding compensation and meets the compensation requirements when the rotation axes of the gears at both ends of the even-numbered gear set are not coaxial with the rotation axes of the left turn plate and the right turn plate; secondly, the left flap and the right flap are respectively integrated with the left damping member and the right damping member, and the degree of integration is high.

[0028] (2) In the present invention, an even-numbered gear set, a left flap, a right flap, a left damping member and a right damping member are symmetrically provided on the front and rear sides of the mounting base of the hinge device located in the middle of the hinge mounting seat, and a left slide groove is symmetrically provided on the front and rear sides of the left turn plate, and a right slide groove is symmetrically provided on the front and rear sides of the right turn plate. The torque can be further increased and the damping effect can be enhanced by adding the left damping member and the right damping member.

[0029] (3) In the present invention, the mounting bases of the hinge device located at both ends of the hinge mounting seat are directly attached to the edge of the hinge mounting seat, which makes it possible to narrow the frame of the mobile terminal.

[0030] (4) The limit assembly of the present invention can effectively prevent the left flip assembly and the right flip assembly from over-rotating when they are closed. At the same time, the limit assembly is cleverly designed. Through the cooperation of the second limit portion and the first limit portion, the over-rotation of the left flap and the right flap is limited, thereby indirectly limiting the over-rotation of the left flip assembly and the right flip assembly when they are closed. This design does not occupy installation space.

[0031] (5) The present invention can further obtain rotation compensation through the rotational connection between the first left connecting plate and the second left connecting plate, and the rotational connection between the first right connecting plate and the second right connecting plate, thereby providing a larger accommodating space for the folding portion of the flexible screen.

[0032] (6) Through the cooperation of the support plate, the elastic component, the left top block and the right top block, the present invention can allow the support plate to support the folding part of the flexible screen upward when the left flip component and the right flip component are unfolded, thereby improving the flatness of the flexible screen; at the same time, when the left flip component and the right flip component are closed, the support plate can sink to provide a holding space for the folding part of the flexible screen that is elongated due to the folding, thereby reducing damage to the folding part of the flexible screen and increasing the service life of the flexible screen.

[0033] (7) The present invention integrates the left damping member and the right damping member on the reference block, which further improves the integration, simplifies the components, and greatly saves the installation space.

[0034] (8) The present invention can simultaneously limit the installation of an even-numbered gear set, a left flap, a right flap, a left damping member and a right damping member through the cooperation of the left snap buckle and the left flap, as well as the cooperation of the right snap buckle and the right flap. The design is ingenious and the assembly is convenient.

[0035] (9) In the present invention, both the left slide groove and the right slide groove are straight grooves; the part where the left flap is slidably connected to the left slide groove is a straight plate body, and the cooperation between the two increases the contact area and reduces the idle travel of the rotating shaft during rotation.

[0036] (10) The coordinated installation of the clamping through hole and the clamping head in the present invention can make the positioning more accurate during assembly and maintain the assembly accuracy of the product.

[0037] (11) The even-numbered gear sets in the middle hinge device of the present invention do not need to use gears because after the hinge devices are set at both ends of the hinge mounting seat, the gears here can be omitted, which plays a role in reducing costs.

[0038] (12) The present invention improves assembly efficiency and reduces manual assembly costs through integrated design. It can be assembled in sections, greatly improving production flexibility.

[0039] (13) All parts of the hinge device in the present invention are common, which reduces mold costs and greatly reduces the number of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0041] Figure 1 It is a structural schematic diagram of the hinge mechanism used for the folding screen in the present invention;

[0042] Figure 2 It is an exploded schematic diagram of a hinge mechanism for a folding screen in the present invention;

[0043] Figure 3 It is a structural schematic diagram of a hinge device installed on a hinge mounting seat in the present invention;

[0044] Figure 4 It is a structural schematic diagram of the hinge devices located at both ends of the hinge mounting base in the present invention;

[0045] Figure 5 It is a rear side schematic diagram of the hinge devices located at both ends of the hinge mounting base in the present invention;

[0046] Figure 6 It is a structural schematic diagram of the hinge device located in the middle of the hinge mounting seat in the present invention;

[0047] Figure 7 It is a schematic diagram of the rear side of the hinge device located in the middle of the hinge mounting seat in the present invention;

[0048] Figure 8 It is a schematic diagram of the support plate and the hinge mounting seat being connected via an elastic component in the present invention;

[0049] Fig. 9 It is a structural schematic diagram of the supporting plate in the present invention being completely lifted up by the left and right lifting blocks;

[0050] Fig.10 It is a structural schematic diagram of the supporting plate in the present invention in a sinking state;

[0051] Fig.11It is a structural schematic diagram of a hinge mechanism for a folding screen in a closed state in the present invention;

[0052] Fig.12 It is a schematic diagram of the installation of an even-numbered gear set in the present invention;

[0053] Fig.13 It is a structural schematic diagram of the mobile terminal in the unfolded state in the present invention;

[0054] Fig.14 for Fig.11 Explosion diagram of

[0055] Fig.15 It is a structural schematic diagram of the mobile terminal in the closed state in the present invention. DETAILED DESCRIPTION

[0056] See Figures 1 to 12 The hinge mechanism for the folding screen in the present invention comprises a hinge mounting seat 1; hinge devices 2 are symmetrically provided at both ends of the hinge mounting seat 1, and a hinge device 2 is also provided in the middle of the hinge mounting seat 1.

[0057] The hinge device 2 located at both ends of the hinge mounting base 1 includes a mounting base 21 , and a left flip assembly 23 and a right flip assembly 24 rotatably arranged on the mounting base 21 and forming synchronous flipping through an even-numbered gear set 22 .

[0058] The left flip assembly 23 includes a left turn plate 231, a left flap 232 and a left damping member 233; the left turn plate 231 includes a first left connecting plate 231-1 for fixedly connecting the left supporting middle frame 3, and a second left connecting plate 231-2 for fixedly connecting the left housing 4; one end of the first left connecting plate 231-1 is rotatably connected to the mounting base 21, and the other end is rotatably connected to the second left connecting plate 231-2 through a rotating shaft; a left slide groove 231-3 is provided on the second left connecting plate 231-2; the even-numbered gear set 22 includes four gears that are rotatably arranged on the retaining frame 221 and cooperate with each other in transmission; one end of the left flap 232 is transmission-connected to the leftmost gear of the even-numbered gear set 22, and the other end of the left flap 232 is formed with the left slide groove 231-3 for sliding compensation with the rotation of the left flip assembly 23 The sliding connection with compensation is specifically as follows: the left flap 232 is provided with a left flange 232-1 extending along the sliding direction of the left flap 232 in the left slide groove 231-3; the left turn plate 231 is provided with a left buckle 231-4 for clamping the left flange 232-1 and limiting the sliding connection of the left flap 232 in the left slide groove 231-3; the left damping member 233 includes a first left damping convex tooth 233-1 provided on the left flap 232 and coaxially rotating with the left flap 232, and a second left damping convex tooth 233-3 seeking to mesh with the first left damping convex tooth 233-1 under the action of the left damping spring 233-2; as the left flip assembly 23 rotates, the first left damping convex tooth 233-1 and the second left damping convex tooth 233-3 form a damped rotation through the distance difference formed in the continuous meshing process. The first left damping convex tooth 233-1 and the left flap 232 are an integral part.

[0059] The right flip assembly 24 includes a right turn plate 241, a right flip plate 242 and a right damping member 243; the right turn plate 241 includes a first right connecting plate 241-1 for fixedly connecting the right supporting middle frame 5, and a second right connecting plate 241-2 for fixedly connecting the right housing 6; one end of the first right connecting plate 241-1 is rotatably connected to the mounting base 21, and the other end is rotatably connected to the second right connecting plate 241-2 through a rotating shaft; a right slide groove 241-3 is provided on the second right connecting plate 241-2; one end of the right flip plate 242 is connected to the rightmost gear transmission of the even-numbered gear set 22, and the other end of the right flip plate 242 forms a sliding connection with the right slide groove 241-3 for sliding compensation as the right flip assembly 24 rotates, and the specific sliding connection is: The right flap 242 is provided with a right flange 242-1 extending along the sliding direction of the right flap 242 in the right slide groove 241-3; the right turn plate 241 is provided with a right buckle 241-4 for clamping the right flange 242-1 and limiting the right flap 242 from slidingly connecting to the right slide groove 241-3; the right damping member 243 includes a first right damping convex tooth 243-1 provided on the right flap 242 and coaxially rotating with the right flap 242, and a second right damping convex tooth 243-3 seeking to engage with the first right damping convex tooth 243-1 under the action of the right damping spring 243-2; as the right flip assembly 24 rotates, the first right damping convex tooth 243-1 and the second right damping convex tooth 243-3 form a damped rotation through the distance difference formed in the continuous engagement process. The first right damping convex tooth 243-1 and the right flap 242 are an integral part.

[0060] The left slide groove 231-3 and the right slide groove 241-3 are both straight grooves; the part where the left flap 232 is slidably connected to the left slide groove 231-3 is a straight plate body; the part where the right flap 242 is slidably connected to the right slide groove 241-3 is also a straight plate body.

[0061] The left supporting middle frame 3 and the right supporting middle frame 5 are used to support the flexible screen 7 .

[0062] The hinge device 2 located in the middle of the hinge mounting seat 1 is different from the hinge devices 2 located at both ends of the hinge mounting seat 1 in that: the front and rear sides of its mounting base 21 are symmetrically provided with an even-numbered gear set 22, a left flap 232, a right flap 242, a left damping member 233 and a right damping member 243; the front and rear sides of the left turning plate 231 of the middle hinge device 2 are symmetrically provided with a left slide groove 231-3 and a left buckle 231-4, and the front and rear sides of the right turning plate 241 of the middle hinge device 2 are symmetrically provided with a right slide groove 241-3 and a right buckle 241-4; the left flap 232 is connected to the leftmost gear on the even-numbered gear set 22 on the corresponding side, and the right flap 242 is connected to the rightmost gear on the even-numbered gear set 22 on the corresponding side. The end gear transmission connection; the left flap 232 is slidably set in the left slide groove 231-3 on the corresponding side, and forms a sliding connection with the left flange 232-1 on the left flap 232 through the left buckle 231-4 to limit the left flap 232 from being separated from the left slide groove 231-3; the right flap 242 is slidably set in the right slide groove 241-3 on the corresponding side, and forms a sliding connection with the right flange 242-1 on the right flap 242 through the right buckle 241-4 to limit the right flap 242 from being separated from the right slide groove 241-3; each left flap 232 is correspondingly provided with a left damping member 233, and each right flap 242 is correspondingly provided with a right damping member 243; the other structural methods are the same as those of the hinge device 2 located at both ends of the hinge mounting seat 21.

[0063] The left damping member 233 and the right damping member 243 of the hinge device 2 located at both ends of the hinge mounting seat 1 are both located on one side of the hinge device 2 close to the middle of the mounting base 21 .

[0064] The left flip assembly 23 and the right flip assembly 24 are both provided with a limit assembly 8 for preventing the left flip assembly 23 and the right flip assembly 24 from over-rotating when they are closed.

[0065] The limiting assembly 8 includes a first limiting portion 81 and a second limiting portion 82; the first limiting portion 81 is respectively provided on the left flap 232 and the right flap 242; the retaining frame 221 of the even-numbered gear set 22 is provided with a second limiting portion 82 corresponding to the first limiting portion 81 on the left flap 232 and the first limiting portion 81 on the right flap 242; when the left flip assembly 23 and the right flip assembly 24 are closed, the second limiting portion 82 contacts the first limiting portion 81 and limits the left flap 232 and the right flap 242 from continuing to close and rotate.

[0066] A supporting plate 9 for supporting the flexible screen 7 is provided between adjacent hinge devices 2; the supporting plate 9 is connected to the hinge mounting seat 1 through two elastic components 10; the elastic component 10 includes a reference block 101, a reset spring 102 and a limit screw 103; the reference block 101 is fixedly connected to the hinge mounting seat 1 in a detachable manner; a limit through hole 101-1 is provided on the reference block 101; an insert 91 is provided at the lower plane of the supporting plate 9 corresponding to the limit through hole 101-1, and an internal threaded hole threadedly matched with the limit screw 103 is provided on the insert 91; a retaining ring for limiting the nut of the limit screw to pass through is provided at the upper port portion of the limit through hole 101-1; the insert 91 is inserted from the upper end of the limit tube through hole 101-1 and threadedly matched with the limit screw 103; the reset spring 102 is sleeved on the insert 91, and the two ends of the reset spring 102 act on the nut and the retaining ring of the limit screw 103 respectively;

[0067] A left top block 233-4 which can rotate therewith is provided on the output shaft of the gear of the even-numbered gear set 22 which is transmission-connected to the left flap 232; a right top block 243-4 which can rotate therewith is provided on the output shaft of the gear of the even-numbered gear set 22 which is transmission-connected to the right flap 242; both the left top block 233-4 and the right top block 243-4 are provided with a top head for lifting the supporting plate; when the left flip assembly 23 and the right flip assembly 24 are in full opening, the top heads on the left top block 233-4 and the right top block 243-3 completely lift the supporting plate 9 under the action of the pulling force of the return spring 102; when the left flip assembly 23 and the right flip assembly 24 are in full closing, the top heads on the left top block 233-4 and the right top block 243-4 are separated from the supporting plate 9, and the supporting plate 9 sinks under the action of the return spring 102.

[0068] A reference block 101 is provided between the left damping member 233 and the right damping member 243 of each hinge device 2; the left and right sides of the reference block 101 are symmetrically provided with limiting holes 101-2; the output shaft of the gear of the even-numbered gear set 22 connected to the left flap 232 passes through the corresponding first left damping convex tooth 233-1, the second left damping convex tooth 233-3, the left damping spring 233-2, the limiting hole 101-2 and the left top block 233-4 in sequence, and is connected to the first left damping convex tooth 233-1, The left top block 233-4 forms a transmission connection, that is, as the left flap 232 rotates, the first left damping convex tooth 233-1, the left top block 233-4 and the output shaft are driven to rotate, and the output shaft rotates in the second left damping convex tooth 233-3, the left damping spring 233-2 and the limiting hole 101-2; the two ends of the left damping spring 233-2 act on the second left damping convex tooth 233-3 and the corresponding end surface of the limiting hole 101-2 facing the second left damping convex tooth 233-3 respectively;

[0069] The output shaft of the gear of the even-numbered gear set 22 connected to the right flap 242 passes through the corresponding first right damping convex tooth 243-1, the second right damping convex tooth 243-3, the right damping spring 243-2, the limiting hole 101-2 and the right top block 243-4 in sequence, and forms a transmission connection with the first right damping convex tooth 243-1 and the right top block 243-4, that is, as the right flap 242 rotates, the first right damping convex tooth 243-1 and the right top block 243-4 are driven And the output shaft rotates, and the output shaft rotates in the second right damping tooth 243-3, the right damping spring 243-2, and the limiting hole 101-2; the two ends of the right damping spring 243-2 respectively act on the second right damping tooth 243-3 and the corresponding end surface of the limiting hole 101-2 facing the second right damping tooth 243-3; the second left damping tooth 233-3 and the second right damping tooth 243-3 located on the same side are connected into one through a connecting plate.

[0070] The retaining frame 221 includes a first retaining plate 221-1 and a second retaining plate 221-2 that are arranged opposite to each other; the gears of the even-numbered gear set 22 are located between the first retaining plate 221-1 and the second retaining plate 221-2 and are rotatably arranged on the first retaining plate 221-1 and the second retaining plate 221-2; the first retaining plate 221-1 is a part of the mounting base 21; the first retaining plate 221-1 is provided with a clamping through hole 221 at the gears at both ends of the even-numbered gear set 22 -3; output shafts are provided on the gears at both ends of the even-numbered gear set 22, and a clamping head 222 is provided at one end of the output shaft located on the first retaining plate 221-1; the clamping through hole 221-3 includes a through hole 221-3a for the output shaft of the corresponding gear to pass through and form a coaxiality limit, and an avoidance groove 221-3b for the clamping head 222 to pass through; when the output shafts of the gears at both ends pass through the clamping through hole 221-3, the clamping head 222 and the through hole 221-3a are rotated to form a limit clamping.

[0071] See Figures 13 to 15 The mobile terminal in the present invention includes the above-mentioned hinge mechanism for folding the screen, a left casing 4 and a right casing 6; the left casing 4 is fixedly connected to the second left connecting plate 231-2, and the right casing 6 is fixedly connected to the second right connecting plate 241-2; the inner sides of the left casing 4 and the right casing 6 are respectively installed with a left supporting plate 41 and a right supporting plate 61 for supporting the rotation of the flexible screen 7, and the left supporting plate 41 and the right supporting plate 61 are fixedly connected to the flexible screen 7.

[0072] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hinge mechanism for a folding screen, having a hinge mounting seat; characterized in that: A plurality of hinge devices are installed on the hinge mounting base along its extension direction; the hinge device includes a mounting base, and a left flip assembly and a right flip assembly that are rotatably arranged on the mounting base and are synchronously flipped through an even-numbered gear set; the left flip assembly includes a left turn plate, a left flap and a left damping member; the left turn plate is rotatably connected to the mounting base, and a left slide groove is provided on the left turn plate; one end of the left flap is connected to a gear transmission at one end of the even-numbered gear set, and the other end of the left flap is connected to the left slide groove to form a sliding connection for sliding compensation as the left flip assembly rotates; the left damping member includes a first left damping convex tooth that is arranged on the left flap and rotates coaxially with the left flap, and a second left damping convex tooth that seeks to mesh with the first left damping convex tooth under the action of a left damping spring; As the left flip assembly rotates, the first left damping convex tooth and the second left damping convex tooth form a damped rotation through a distance difference formed during continuous meshing; The right flip assembly includes a right turn plate, a right flap and a right damping member; the right turn plate is rotatably connected to the mounting base, and a right slide groove is provided on the right turn plate; one end of the right flap is connected to the gear transmission of the other end of the even-numbered gear set, and the other end of the right flap forms a sliding connection with the right slide groove for sliding compensation as the right flip assembly rotates; the right damping member includes a first right damping convex tooth arranged on the right flap and coaxially rotating with the right flap, and a second right damping convex tooth seeking to mesh with the first right damping convex tooth under the action of a right damping spring; as the right flip assembly rotates, the first right damping convex tooth and the second right damping convex tooth form a damped rotation through the distance difference formed in the continuous meshing process; Hinge devices are provided at both ends and the middle of the hinge mounting seat; an even-numbered gear set, a left flap, a right flap, a left damping member and a right damping member are symmetrically provided on the front and rear sides of the mounting base of the hinge device in the middle; a left slide groove is symmetrically provided on the front and rear sides of the left turning plate of the hinge device in the middle, and a right slide groove is symmetrically provided on the front and rear sides of the right turning plate of the hinge device in the middle; an even-numbered gear set of the hinge device in the middle includes an even-numbered gears mounted on a retaining frame and drivingly matched with each other, or includes two rotating shafts mounted on a retaining frame; When the even-numbered gear set of the hinge device in the middle portion includes an even number of gears mounted on the retaining frame and drivingly matched with each other, the left flap is drivingly connected to the gear at one end of the even-numbered gear set on the corresponding side, and the right flap is drivingly connected to the gear at the other end of the even-numbered gear set on the corresponding side; When the even-numbered gear set of the hinge device in the middle includes two rotating shafts mounted on the retaining frame, the left flap is in transmission connection with the rotating shaft at one end of the even-numbered gear set on the corresponding side, and the right flap is in transmission connection with the rotating shaft at the other end of the even-numbered gear set on the corresponding side; The left flap forms a sliding connection with the left slide groove on the corresponding side; the right flap forms a sliding connection with the right slide groove on the corresponding side; each left flap is provided with a left damping member, and each right flap is provided with a right damping member; The left damping member and the right damping member of the hinge device located at both ends of the hinge mounting seat are both located on one side of the hinge device near the middle of the mounting base; A supporting plate for supporting the flexible screen is provided between adjacent hinge devices; the supporting plate is connected to the hinge mounting seat by at least one elastic component; the elastic component includes a reference block, a reset spring and a limit screw; the reference block is fixedly connected to the hinge mounting seat in a detachable manner; a limit through hole is provided on the reference block; an insert is provided at a position on the lower plane of the supporting plate corresponding to the limit through hole, and the insert is provided with an internal threaded hole that matches the thread of the limit screw; a retaining ring that limits the nut of the limit screw from passing through is provided at the upper port portion of the limit through hole; the insert is inserted from the upper end of the through hole of the limit tube and matches the thread of the limit screw; the reset spring is sleeved on the insert, and the two ends of the reset spring act on the nut and the retaining ring of the limit screw respectively; The output shaft of the gear of the even-numbered gear set connected to the left flap is provided with a left top block that can rotate therewith; the output shaft of the gear of the even-numbered gear set connected to the right flap is provided with a right top block that can rotate therewith; the left top block and the right top block are both provided with a top head for lifting the supporting plate; when the left flip assembly and the right flip assembly are fully opened, the top heads on the left top block and the right top block completely lift the supporting plate under the action of the pulling force of the return spring; when the left flip assembly and the right flip assembly are fully closed, the top heads on the left top block and the right top block are separated from the supporting plate, and the supporting plate sinks under the action of the return spring; The left flap is provided with a left flange extending along the sliding direction in the left slide groove; the right flap is provided with a right flange extending along the sliding direction in the right slide groove; the left turning plate is provided with a left buckle for clamping the left flange and limiting the sliding connection of the left flap in the left slide groove; the right turning plate is provided with a right buckle for clamping the right flange and limiting the sliding connection of the right flap in the right slide groove.

2. The hinge mechanism for a folding screen according to claim 1, characterized in that: The left slide groove and the right slide groove are both straight grooves; the part where the left flap is slidably connected to the left slide groove is a straight plate body; the part where the right flap is slidably connected to the right slide groove is also a straight plate body.

3. The hinge mechanism for a folding screen according to claim 1, characterized in that: The left flip assembly and the right flip assembly are both provided with a limit assembly for preventing the left flip assembly and the right flip assembly from over-rotating when they are closed.

4. The hinge mechanism for a folding screen according to claim 3, characterized in that: The limiting assembly includes a first limiting portion and a second limiting portion; the first limiting portion is respectively provided on the left flap and the right flap; a second limiting portion corresponding to the first limiting portion on the left flap and the first limiting portion on the right flap is respectively provided on the retaining frame of the even-numbered gear set or the hinge mounting seat; when the left flip assembly and the right flip assembly are closed, the second limiting portion contacts the first limiting portion and limits the left flap and the right flap from continuing to close and rotate.

5. A hinge mechanism for a folding screen according to claim 1, 2, 3 or 4, characterized in that: The left turning plate includes a first left connecting plate for fixedly connecting the left supporting middle frame, and a second left connecting plate for fixedly connecting the left housing; one end of the first left connecting plate is rotatably connected to the mounting base, and the other end is rotatably connected to the second left connecting plate through a rotating shaft; a left sliding groove is provided on the second left connecting plate; The right turning plate includes a first right connecting plate for fixedly connecting to the right supporting middle frame, and a second right connecting plate for fixedly connecting to the right housing; one end of the first right connecting plate is rotatably connected to the mounting base, and the other end is rotatably connected to the second right connecting plate through a rotating shaft; a right sliding groove is provided on the second right connecting plate; The left supporting middle frame and the right supporting middle frame are used to support the flexible screen.

6. The hinge mechanism for a folding screen according to claim 1, characterized in that: A reference block is provided between the left damping member and the right damping member of each hinge device; limit holes are symmetrically provided on the left and right sides of the reference block; the output shaft of the gear of the even-numbered gear set connected to the left flap in transmission sequentially passes through the corresponding first left damping convex tooth, the second left damping convex tooth, the left damping spring, the limit hole and the left top block, and forms a transmission connection with the first left damping convex tooth and the left top block; the two ends of the left damping spring act on the second left damping convex tooth and the end surface of the corresponding limit hole facing the second left damping convex tooth respectively; The output shaft of the gear of the even-numbered gear set transmission-connected with the right flap sequentially passes through the corresponding first right damping convex tooth, the second right damping convex tooth, the right damping spring, the limiting hole and the right top block, and forms a transmission connection with the first right damping convex tooth and the right top block; the two ends of the right damping spring respectively act on the second right damping convex tooth and the end surface of the corresponding limiting hole facing the second right damping convex tooth; The second left damping protruding tooth and the second right damping protruding tooth located on the same side are connected into one body through a connecting plate.

7. The hinge mechanism for a folding screen according to claim 1, characterized in that: The retaining frame includes a first retaining plate and a second retaining plate that are arranged opposite to each other; the gears of the even-numbered gear set are located between the first retaining plate and the second retaining plate and are rotatably arranged on the first retaining plate and the second retaining plate; the first retaining plate is fixedly connected to the hinge mounting seat or is a part of the mounting base; the first retaining plate is provided with clamping through holes at the gears at both ends of the even-numbered gear set; the gears at both ends of the even-numbered gear set are provided with output shafts, and the output shaft is located at one end of the first retaining plate and is provided with a clamping head; the clamping through holes include a through hole for the output shaft of the corresponding gear to pass through and form a coaxiality limit, and an avoidance groove for the clamping head to pass through; when the output shafts of the gears at both ends pass through the clamping through holes, the clamping head and the through holes are rotated to form a limit clamping.

8. A mobile terminal, characterized in that: It includes a hinge mechanism for a folding screen as described in claim 6, a left casing and a right casing; the left casing is fixedly connected to the second left connecting plate, and the right casing is fixedly connected to the second right connecting plate; a left support plate and a right support plate for supporting the rotation of the flexible screen are respectively installed on the inner sides of the left casing and the right casing, and the left support plate and the right support plate are fixedly connected to the flexible screen.

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