Hinge mechanism and mobile terminal

Abstract

The present invention provides a hinge mechanism and a mobile terminal, wherein the hinge mechanism includes a base, a first rotating member, a second rotating member and a guide structure, wherein the first rotating member is connected to the base, the first rotating member is rotatably arranged around a first rotation center line, and the first rotating member has a first guide groove; the second rotating member is connected to the base, the second rotating member is rotatably arranged around a second rotation center line, the second rotation center line is parallel to the first rotation center line, and the second rotating member has a second guide groove; the first guide groove and the second guide groove are both limitedly matched with the guide structure, so that the first rotating member and the second rotating member rotate synchronously. With this solution, when one rotating member in the hinge mechanism rotates, the transmission of the guide structure can drive the other rotating member to rotate, thereby realizing the synchronous rotation of the first rotating member and the second rotating member. Compared with the existing hinge mechanism with synchronous rotation function, this method has a simple structure and fewer parts, thereby reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile terminals, and in particular to a hinge mechanism and a mobile terminal. Background Art

[0002] Currently, most of the mobile smart terminals on the market are straight-screen mobile phone terminals. Relying on the advancement of display technology and consumers' pursuit of new forms of mobile terminals, some manufacturers have launched foldable mobile terminal products one after another, and foldable mobile terminals have become a major development trend.

[0003] There are two folding modes: external folding and internal folding. External folding is easier to operate, while internal folding is more conducive to protecting the flexible display screen. The folding of the mobile phone is mainly achieved through a hinge mechanism. The existing hinge mechanisms used in folding terminals have various forms. In order to ensure that the two parts of the folding structure rotate synchronously, many parts are needed, and the size of each part is very small, which is very unfavorable for manufacturing and assembly, and the cost is high.

[0004] Based on this, it is necessary to design a hinge mechanism with a simple structure and capable of achieving functional requirements. Summary of the invention

[0005] The present invention provides a hinge mechanism and a mobile terminal, so as to provide a new method for realizing synchronous rotation of two parts, simplify the structure of the hinge mechanism and reduce the cost.

[0006] In order to achieve the above-mentioned object, according to one aspect of the present invention, the present invention provides a hinge mechanism, comprising: a base;

[0007] A first rotating member is connected to the base, the first rotating member is rotatably arranged around a first rotation center line, and the first rotating member has a first guide groove; a second rotating member is connected to the base, the second rotating member is rotatably arranged around a second rotation center line, the second rotation center line is parallel to the first rotation center line, and the second rotating member has a second guide groove; a guiding structure, the first guide groove and the second guide groove are both limitedly matched with the guiding structure to enable the first rotating member and the second rotating member to rotate synchronously.

[0008] Furthermore, the extension directions of the first guide groove and the second guide groove are inclined relative to the first rotation center line, and the inclination directions of the first guide groove and the second guide groove are opposite; the guide structure includes a plate body and a first limit member and a second limit member spaced apart on the plate body, the first limit member is located in the first guide groove, and the second limit member is located in the second guide groove.

[0009] Further, the first guide groove is a spiral groove around the first rotation center line, the second guide groove is a spiral groove around the second rotation center line, and the first guide groove and the second guide groove have opposite rotation directions.

[0010] Further, the first limit member abuts against two side walls of the first guide groove, and the second limit member abuts against two side walls of the second guide groove; the first rotation center line and the second rotation center line are symmetrically arranged relative to a preset plane, the first limit member and the second limit member are respectively located on both sides of the preset plane, the distance between the first limit member and the preset plane is L1, and the distance between the second limit member and the preset plane is L2, wherein L1 and L2 are equal or L1 and L2 are not equal; in the process of the first rotating member and the second rotating member rotating relative to the base, the first limit member and the second limit member both move along the first rotation center line, and the moving distances of the first limit member and the second limit member are equal.

[0011] Furthermore, the hinge mechanism also includes: a limiting structure, the limiting structure is connected to the base, the limiting structure and the guiding structure cooperate in radial limiting manner on the first rotation center line, and the guiding structure is movably arranged along the first rotation center line.

[0012] Further, the guiding structure has a limiting groove, the inner wall of the limiting groove has a first step, the extension direction of the first step is parallel to the first rotation center line; the limiting structure includes a pressing block and a fastener, the fastener passes through the pressing block, the limiting groove and the base in sequence, the pressing block has a second step, the second step and the first step are limited and matched, and the length of the first step is greater than the length of the second step.

[0013] Further, the first rotating member includes a first supporting plate and a first rotating block arranged on the first supporting plate, and the first guide groove is located on the first rotating block; the base has a first concave cavity, the first rotating block is rotatably arranged in the first concave cavity, and the first concave cavity has an opening that avoids the first guide groove.

[0014] Furthermore, the first rotating block has a first arc-shaped guide groove, the inner wall of the first concave cavity has a first arc-shaped rib, the first arc-shaped rib is rotatably arranged in the first arc-shaped guide groove, and the axis of the first arc-shaped guide groove and the axis of the first arc-shaped rib are both the first rotation center line.

[0015] Furthermore, the inner wall of the first cavity has a third arc-shaped guide groove, the axis of the third arc-shaped guide groove is the first rotation center line, and a limit pin is provided on the first rotation block, and the limit pin is slidably disposed in the third arc-shaped guide groove.

[0016] Furthermore, the first rotating member also includes a first arc-shaped damping member arranged on the first supporting plate; the hinge mechanism also includes a first damping block and a first elastic member, and the first elastic member applies an elastic force to the first damping block to press the first damping block against the first arc-shaped damping member.

[0017] Furthermore, the first arc-shaped damping member has a mating surface in the shape of crests and troughs, and the first damping block abuts against the mating surface; the base includes a main body and a first rod body arranged on the main body, the first rod body is parallel to the first rotation center line, the first elastic member and the first damping block are both mounted on the first rod body, and the first damping block and the first rod body are fixed in relative positions in the circumferential direction.

[0018] Furthermore, the first rod body has a first limiting surface, the hole of the first damping block has a second limiting surface, and the second limiting surface cooperates with the first limiting surface; the base also includes a third rod body arranged on the main body, and the hinge mechanism also includes a third elastic member and a stop member, the third elastic member is sleeved on the third rod body, and the two ends of the third elastic member are respectively abutted against the main body and the stop member, and the two ends of the first elastic member are respectively abutted against the first damping block and the stop member.

[0019] According to another aspect of the present invention, a mobile terminal is provided, comprising the above-mentioned hinge mechanism.

[0020] Furthermore, the mobile terminal also includes a first back cover, a second back cover, a bottom cover and a flexible screen, the two side areas of the flexible screen are respectively connected to the first back cover and the second back cover, the middle area of ​​the flexible screen is bendable, and the middle area of ​​the flexible screen corresponds to the bottom cover; the first rotating part of the hinge mechanism is connected to the first back cover, the second rotating part of the hinge mechanism is connected to the second back cover, and the base of the hinge mechanism is connected to the bottom cover.

[0021] Furthermore, a first rotation center line of the first rotating member and a second rotation center line of the second rotating member are both located on the neutral layer of the flexible screen, and a distance between the first rotation center line and the second rotation center line is greater than a minimum bending diameter of the neutral layer.

[0022] The technical scheme of the present invention is applied to provide a hinge mechanism, which includes a base, a first rotating member, a second rotating member and a guide structure. The first rotating member is connected to the base, the first rotating member is rotatably arranged around a first rotation center line, and the first rotating member has a first guide groove; the second rotating member is connected to the base, the second rotating member is rotatably arranged around a second rotation center line, the second rotation center line is parallel to the first rotation center line, and the second rotating member has a second guide groove; the first guide groove and the second guide groove are both limitedly matched with the guide structure to make the first rotating member and the second rotating member rotate synchronously. With this scheme, through the limitedly matched between the guide structure and the first guide groove and the second guide groove, the first rotating member, the guide structure and the second rotating member realize a driving matching relationship, so that when one rotating member in the hinge mechanism rotates, the transmission of the guide structure can drive the other rotating member to rotate, thereby realizing the synchronous rotation of the first rotating member and the second rotating member. Compared with the existing hinge mechanism with synchronous rotation function, this method has a simple structure and fewer parts, thereby reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 A schematic structural diagram of a hinge mechanism provided in Embodiment 1 of the present invention is shown;

[0025] Figure 2 Shows Figure 1 Schematic diagram of the hinge mechanism without the guide structure;

[0026] Figure 3 Shows Figure 1 Schematic diagram of the folding of the hinge mechanism;

[0027] Figure 4 Shows Figure 1 A schematic diagram of a guide structure in a hinge mechanism;

[0028] Figure 5 Shows Figure 1 A schematic diagram of a first rotating member in a hinge mechanism;

[0029] Figure 6 Shows Figure 1 A schematic diagram of a base in a hinge mechanism;

[0030] Figure 7 The figure shows a structural schematic diagram of the hinge mechanism provided in the second embodiment of the present invention (without the guide structure);

[0031] Figure 8 Shows Figure 7 A schematic diagram of a guide structure in a hinge mechanism;

[0032] Fig. 9 A schematic diagram showing a first rotating member in a hinge mechanism provided in a third embodiment of the present invention is shown;

[0033] Fig.10 A schematic diagram showing a base in a hinge mechanism provided in a third embodiment of the present invention is shown;

[0034] Fig.11 A schematic diagram of a mobile terminal provided by a fourth embodiment of the present invention is shown;

[0035] Fig.12 Shows Fig.11 Schematic diagram of a mobile terminal without the flexible screen.

[0036] The above drawings include the following reference numerals:

[0037] 10. Base; 11. First arc rib; 12. Third arc guide groove; 13. Main body; 14. First rod body; 15. Third rod body; 20. First rotating member; 21. First guide groove; 22. First support plate; 23. First rotating block; 24. First arc guide groove; 25. Limit pin; 26. First arc damping member; 30. Second rotating member; 31. Second guide groove; 40. Guide structure; 41. Plate body; 42. First limit member; 43. Second limit member; 44. Limit groove; 50. Limit structure; 51. Press block; 52. Fastener; 61. First damping block; 62. First elastic member; 63. Third elastic member; 64. Stop member; 71. First rear cover; 72. Second rear cover; 73. Bottom cover; 74. Flexible screen. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figures 1 to 12As shown, an embodiment of the present invention provides a hinge mechanism, including: a base 10; a first rotating member 20, connected to the base 10, the first rotating member 20 is rotatably arranged around a first rotation center line, and the first rotating member 20 has a first guide groove 21; a second rotating member 30, connected to the base 10, the second rotating member 30 is rotatably arranged around a second rotation center line, the second rotation center line is parallel to the first rotation center line, and the second rotating member 30 has a second guide groove 31; a guide structure 40, the first guide groove 21 and the second guide groove 31 are both limitedly matched with the guide structure 40, so that the first rotating member 20 and the second rotating member 30 rotate synchronously.

[0040] With this solution, the first rotating member 20, the guiding structure 40 and the second rotating member 30 realize a driving cooperation relationship through the limited cooperation of the guiding structure 40 and the first guiding groove 21 and the second guiding groove 31, so that when one rotating member in the hinge mechanism rotates, the other rotating member can be driven to rotate through the transmission of the guiding structure 40, thereby realizing the synchronous rotation of the first rotating member 20 and the second rotating member 30. Compared with the existing hinge mechanism with synchronous rotation function, this method has a simple structure and fewer parts, thereby reducing the cost.

[0041] Specifically, the extension directions of the first guide groove 21 and the second guide groove 31 are both inclined relative to the first rotation center line, and the inclination directions of the first guide groove 21 and the second guide groove 31 are opposite; the guide structure 40 includes a plate body 41 and a first stopper 42 and a second stopper 43 arranged on the plate body 41 at intervals, the first stopper 42 is located in the first guide groove 21, and the second stopper 43 is located in the second guide groove 31. In this way, the driving cooperation of the first rotating member 20, the guide structure 40 and the second rotating member 30 is realized, wherein the guide structure 40 can play a transmission role. For example, when the first rotating member 20 rotates relative to the base 10, the first guide groove 21 drives the guide structure 40 to move through the first stopper 42, and the second stopper 43 of the guide structure 40 drives the second rotating member 30 to rotate through the second guide groove 31, thereby realizing the synchronous rotation of the two rotating members. In this way, the screen can be prevented from being pulled or squeezed when applied to the mobile terminal, thereby protecting the screen. Among them, the inclination angles of the first guide groove 21 and the second guide groove 31 are equal. The plate body 41 is an arc structure.

[0042] In this embodiment, the first guide groove 21 is a spiral groove around the first rotation center line, and the second guide groove 31 is a spiral groove around the second rotation center line. The first guide groove 21 and the second guide groove 31 have opposite rotation directions. Among them, the first guide groove 21 and the second guide groove 31 have equal lead angles, which can also be understood as equal leads. Through the above arrangement, when the first rotating member 20 rotates a certain angle relative to the base 10, it can be ensured that the second rotating member 30 rotates the same angle relative to the base 10, so as to better protect the screen.

[0043] In this embodiment, the first stopper 42 abuts against the two side walls of the first guide groove 21, and the second stopper 43 abuts against the two side walls of the second guide groove 31, so that the driving cooperation can be better achieved. The first rotation center line and the second rotation center line are symmetrically arranged relative to the preset plane, and the first stopper 42 and the second stopper 43 are respectively located on both sides of the preset plane. The distance between the first stopper 42 and the preset plane is L1, and the distance between the second stopper 43 and the preset plane is L2, wherein L1 and L2 are equal. Figure 4 As shown, or L1 and L2 are not equal, such as Figure 8 As shown in the figure, when the first rotating member 20 and the second rotating member 30 rotate relative to the base 10, the first stopper 42 and the second stopper 43 both move along the first rotation center line, and the movement distances of the first stopper 42 and the second stopper 43 are equal. In this way, when the first rotating member 20 rotates a certain angle relative to the base 10, it can be ensured that the second rotating member 30 rotates the same angle relative to the base 10.

[0044] In this embodiment, the hinge mechanism further includes: a limiting structure 50, the limiting structure 50 is connected to the base 10, the limiting structure 50 and the guide structure 40 are matched in radial limiting manner of the first rotation center line, and the guide structure 40 is movably arranged along the first rotation center line. The limiting structure 50 can limit the guide structure 40, so that when the first rotating member 20 and the second rotating member 30 rotate, the guide structure 40 can only move along the direction of the first rotation center line, thereby generating a limiting and driving effect, so that the first rotating member 20 and the second rotating member 30 rotate synchronously.

[0045] Specifically, the guide structure 40 has a limiting groove 44, the inner wall of the limiting groove 44 has a first step, and the extension direction of the first step is parallel to the first rotation center line; the limiting structure 50 includes a pressing block 51 and a fastener 52, the fastener 52 passes through the pressing block 51, the limiting groove 44 and the base 10 in sequence, the pressing block 51 has a second step, the second step and the first step are limited and matched, and the length of the first step is greater than the length of the second step. Through the above settings, the limiting match between the limiting structure 50 and the guide structure 40 can be achieved. And under the guidance of the first step and the second step, it is conducive to the movement of the guide structure 40 along the predetermined direction.

[0046] In this embodiment, the first rotating member 20 includes a first support plate 22 and a first rotating block 23 disposed on the first support plate 22, and the first guide groove 21 is located on the first rotating block 23; the base 10 has a first concave cavity, the first rotating block 23 is rotatably disposed in the first concave cavity, and the first concave cavity has an opening that avoids the first guide groove 21. In this way, the first rotating member 20 and the base 10 are rotated together, and the structure is compact, reducing the volume of the hinge mechanism. Among them, the second rotating member 30 can be set to the same structure as the first rotating member 20.

[0047] like Figure 5 and Figure 6 As shown, the first rotating block 23 has a first arc-shaped guide groove 24, and the inner wall of the first concave cavity has a first arc-shaped rib 11. The first arc-shaped rib 11 is rotatably arranged in the first arc-shaped guide groove 24, and the axis of the first arc-shaped guide groove 24 and the axis of the first arc-shaped rib 11 are both the first rotation center line. Through the cooperation of the first arc-shaped guide groove 24 and the first arc-shaped rib 11, the first rotating block 23 can be guided so that the first rotating block 23 rotates smoothly. Specifically, the first rotating block 23 is a semi-cylindrical structure, and the first arc-shaped guide grooves 24 are arranged on both sides of the first rotating block 23.

[0048] Or, if Fig. 9 and Fig.10 As shown, the inner wall of the first concave cavity has a third arc-shaped guide groove 12, the axis of the third arc-shaped guide groove 12 is the first rotation center line, and a limit pin 25 is provided on the first rotating block 23, and the limit pin 25 is slidably provided in the third arc-shaped guide groove 12. The first rotating block 23 can also be guided by the sliding of the limit pin 25 in the third arc-shaped guide groove 12. There are two limit pins 25, and the two limit pins 25 are arranged in the same third arc-shaped guide groove 12 at intervals. Or, the inner wall of the first concave cavity also has a fourth arc-shaped guide groove, and the fourth arc-shaped guide groove and the third arc-shaped guide groove 12 are arranged concentrically, and a limit pin 25 is respectively arranged in the fourth arc-shaped guide groove and the third arc-shaped guide groove 12.

[0049] In this embodiment, the first rotating member 20 further includes a first arc-shaped damping member 26 disposed on the first supporting plate 22; the hinge mechanism further includes a first damping block 61 and a first elastic member 62, and the first elastic member 62 applies elastic force to the first damping block 61 to press the first damping block 61 against the first arc-shaped damping member 26. Through the above arrangement, a damping effect can be achieved when the user rotates the first rotating member 20, thereby improving the user's experience.

[0050] Specifically, the first arc-shaped damping member 26 has a matching surface in the shape of crests and troughs, and the first damping block 61 abuts against the matching surface; the base 10 includes a main body 13 and a first rod body 14 disposed on the main body 13, the first rod body 14 is parallel to the first rotation center line, the first elastic member 62 and the first damping block 61 are both sleeved on the first rod body 14, and the first damping block 61 and the first rod body 14 are fixed in relative positions in the circumferential direction. In this way, during the rotation of the first rotating member 20, the first arc-shaped damping member 26 rotates relative to the first damping block 61, and the first damping block 61 cooperates with different positions of the matching surface to achieve a damping effect.

[0051] Optionally, when the two rotating parts are at 180° and 0°, the first damping block 61 contacts the trough position of the first arc-shaped damping member 26, so that the hinge mechanism can remain stable when unfolding and closing. When approaching 0° and 180°, the mating surface has a certain slope, so that resistance is formed when closing from 180° and assisting force is formed when unfolding to 180°. Similarly, resistance is formed when unfolding from 0 degrees and assisting force is formed when closing to 0 degrees, thereby improving the user experience.

[0052] Furthermore, the first rod body 14 has a first limiting surface, and the hole of the first damping block 61 has a second limiting surface, and the second limiting surface cooperates with the first limiting surface to prevent the first damping block 61 from rotating. The base 10 also includes a third rod body 15 arranged on the main body 13, and the hinge mechanism also includes a third elastic member 63 and a stopper 64. The third elastic member 63 is sleeved on the third rod body 15, and the two ends of the third elastic member 63 are respectively in contact with the main body 13 and the stopper 64, and the two ends of the first elastic member 62 are respectively in contact with the first damping block 61 and the stopper 64. Through the above arrangement, each elastic member can be kept in a compressed state.

[0053] In this solution, the first guide groove 21 and the second guide groove 31 can also be set on the guide structure 40, the first limit member 42 can be set on the first rotating member 20, and the second limit member 43 can be set on the second rotating member 30. This can also achieve the purpose of synchronous rotation of the first rotating member 20 and the second rotating member 30.

[0054] The present invention also provides a mobile terminal, which includes the hinge mechanism. The mobile terminal may be a mobile phone, a tablet computer, or the like.

[0055] Specifically, the mobile terminal further includes a first back cover 71, a second back cover 72, a bottom cover 73 and a flexible screen 74. The two side areas of the flexible screen 74 are respectively connected to the first back cover 71 and the second back cover 72. The middle area of ​​the flexible screen 74 is bendable, and the middle area of ​​the flexible screen 74 corresponds to the bottom cover 73. The first rotating member 20 of the hinge mechanism is connected to the first back cover 71, the second rotating member 30 of the hinge mechanism is connected to the second back cover 72, and the base 10 of the hinge mechanism is connected to the bottom cover 73. Through this solution, the flexible screen 74 can be protected when the flexible screen 74 is bent. In this solution, the flexible screen 74 is folded inward. It can also be set to fold outward as needed.

[0056] Furthermore, the first rotation centerline of the first rotating member 20 and the second rotation centerline of the second rotating member 30 are both located on the neutral layer of the flexible screen 74, and the distance between the first rotation centerline and the second rotation centerline is greater than the minimum bending diameter of the neutral layer. In this way, the movement of the two rotating members can always maintain bilateral symmetry, so that the neutral layer of the flexible screen 74 can always bend freely without being squeezed, thereby avoiding damage to the flexible screen 74.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hinge mechanism, characterized in that: include: Base (10); A first rotating member (20) connected to the base (10), the first rotating member (20) being rotatably arranged around a first rotating center line, and the first rotating member (20) having a first guide groove (21); a second rotating member (30) connected to the base (10), the second rotating member (30) being rotatably arranged around a second rotating center line, the second rotating center line being parallel to the first rotating center line, and the second rotating member (30) having a second guide groove (31); A guide structure (40), wherein the first guide groove (21) and the second guide groove (31) are both limitedly matched with the guide structure (40) so that the first rotating member (20) and the second rotating member (30) rotate synchronously; A limiting structure (50), the limiting structure (50) includes a pressure block (51) connected to the base (10), the guiding structure (40) has a limiting groove (44), the inner wall of the limiting groove (44) has a first step, the extension direction of the first step is parallel to the first rotation center line, the pressure block (51) has a second step, the second step and the first step are limited and matched, and the length of the first step is greater than the length of the second step, so that the guiding structure (40) can be movably arranged along the first rotation center line.

2. The hinge mechanism according to claim 1, characterized in that: The extension directions of the first guide groove (21) and the second guide groove (31) are both inclined relative to the first rotation center line, and the inclination directions of the first guide groove (21) and the second guide groove (31) are opposite; The guide structure (40) comprises a plate body (41) and a first limiting member (42) and a second limiting member (43) which are arranged on the plate body (41) at intervals, wherein the first limiting member (42) is located in the first guide groove (21) and the second limiting member (43) is located in the second guide groove (31).

3. The hinge mechanism according to claim 2, characterized in that: The first guide groove (21) is a spiral groove around the first rotation center line, and the second guide groove (31) is a spiral groove around the second rotation center line. The first guide groove (21) and the second guide groove (31) have opposite rotation directions.

4. The hinge mechanism according to claim 2, characterized in that: The first limiting member (42) abuts against two side walls of the first guide groove (21), and the second limiting member (43) abuts against two side walls of the second guide groove (31); The first rotation center line and the second rotation center line are symmetrically arranged relative to a preset plane, the first limiter (42) and the second limiter (43) are respectively located on both sides of the preset plane, the distance between the first limiter (42) and the preset plane is L1, and the distance between the second limiter (43) and the preset plane is L2, wherein L1 and L2 are equal or L1 and L2 are not equal; When the first rotating member (20) and the second rotating member (30) rotate relative to the base (10), the first limiting member (42) and the second limiting member (43) both move along the first rotation center line, and the moving distances of the first limiting member (42) and the second limiting member (43) are equal.

5. The hinge mechanism according to claim 1, characterized in that: The limiting structure (50) comprises a fastener (52), the fastener (52) passes through the pressing block (51), the limiting groove (44) and the base (10) in sequence, the fastener (52) is a screw, and the fastener (52) and the base (10) are threadedly connected.

6. The hinge mechanism according to claim 1, characterized in that: The first rotating member (20) comprises a first supporting plate (22) and a first rotating block (23) arranged on the first supporting plate (22), and the first guiding groove (21) is located on the first rotating block (23); the base (10) has a first concave cavity, the first rotating block (23) is rotatably arranged in the first concave cavity, and the first concave cavity has an opening that avoids the first guiding groove (21).

7. The hinge mechanism according to claim 6, characterized in that: The first rotating block (23) has a first arc-shaped guide groove (24), the inner wall of the first concave cavity has a first arc-shaped rib (11), the first arc-shaped rib (11) is rotatably arranged in the first arc-shaped guide groove (24), and the axis of the first arc-shaped guide groove (24) and the axis of the first arc-shaped rib (11) are both the first rotation center line.

8. The hinge mechanism according to claim 6, characterized in that: The inner wall of the first concave cavity has a third arc-shaped guide groove (12), the axis of the third arc-shaped guide groove (12) is the first rotation center line, and a limit pin (25) is provided on the first rotating block (23), and the limit pin (25) is slidably arranged in the third arc-shaped guide groove (12).

9. The hinge mechanism according to claim 6, characterized in that: The first rotating member (20) further comprises a first arc-shaped damping member (26) arranged on the first supporting plate (22); the hinge mechanism further comprises a first damping block (61) and a first elastic member (62), wherein the first elastic member (62) applies an elastic force to the first damping block (61) so as to press the first damping block (61) against the first arc-shaped damping member (26).

10. The hinge mechanism according to claim 9, characterized in that: The first arc-shaped damping member (26) has a matching surface in the shape of crests and troughs, and the first damping block (61) abuts against the matching surface; The base (10) comprises a main body (13) and a first rod body (14) arranged on the main body (13); the first rod body (14) is parallel to the first rotation center line; the first elastic member (62) and the first damping block (61) are both sleeved on the first rod body (14); the first damping block (61) and the first rod body (14) are fixed in relative positions in the circumferential direction.

11. The hinge mechanism according to claim 10, characterized in that: The first rod body (14) has a first limiting surface, the hole of the first damping block (61) has a second limiting surface, and the second limiting surface cooperates with the first limiting surface; The base (10) further comprises a third rod (15) arranged on the main body (13); the hinge mechanism further comprises a third elastic member (63) and a stop member (64); the third elastic member (63) is sleeved on the third rod (15); two ends of the third elastic member (63) are respectively in contact with the main body (13) and the stop member (64); and two ends of the first elastic member (62) are respectively in contact with the first damping block (61) and the stop member (64).

12. A mobile terminal, characterized in that: The mobile terminal comprises the hinge mechanism according to any one of claims 1 to 11.

13. The mobile terminal according to claim 12, characterized in that: The mobile terminal also includes a first back cover (71), a second back cover (72), a bottom cover (73) and a flexible screen (74); the two side areas of the flexible screen (74) are respectively connected to the first back cover (71) and the second back cover (72); the middle area of ​​the flexible screen (74) is bendable, and the middle area of ​​the flexible screen (74) corresponds to the bottom cover (73); the first rotating member (20) of the hinge mechanism is connected to the first back cover (71), the second rotating member (30) of the hinge mechanism is connected to the second back cover (72), and the base (10) of the hinge mechanism is connected to the bottom cover (73).

14. The mobile terminal according to claim 13, characterized in that: The first rotation center line of the first rotating member (20) and the second rotation center line of the second rotating member (30) are both located on the neutral layer of the flexible screen (74), and the distance between the first rotation center line and the second rotation center line is greater than the minimum bending diameter of the neutral layer.

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