Mobile terminal

Abstract

The present disclosure relates to a mobile terminal, comprising a flexible screen and two middle frames. The two middle frames are rotatably connected to each other so that the mobile terminal has an outward folding position and an inward folding position. The flexible screen is laid on the outer surfaces of the two middle frames. Rotating shaft assemblies are respectively arranged at the connection parts of the two middle frames. Each rotating shaft assembly includes a first rotating shaft and a transmission mechanism. The transmission mechanism is respectively connected to the first rotating shaft and the middle frame, and the transmission mechanism is configured such that during the process of the mobile terminal switching between the outward folding position and the inward folding position, the middle frame can move closer to or away from the first rotating shaft in a straight line direction. Through the above technical solution, during the process of the mobile terminal provided by the present disclosure switching from one folding position to another folding position, in order to adapt to the different bending radii of the flexible screen in the two folding positions, the rotating shaft assembly drives the middle frame to move linearly, so that the flexible screen always has an appropriate tension force, avoiding excessive tension or slackness.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic devices, and particularly to a mobile terminal. Background Art

[0002] With the continuous development of technology, in order to adapt to different usage scenarios, people are no longer satisfied with mobile terminal devices having a fixed screen size. Generally, the screen size can be changed by folding. For example, in the unfolded state, it can meet the large-size multi-interface usage requirements in entertainment and office scenarios, while in the folded state, it can achieve conventional small-screen single-handed easy operation and quick information browsing. However, during the folding process of the mobile terminal, the problem of tension damage caused by the change in the folding curvature of the screen is an urgent problem to be solved for such mobile terminal devices. Summary of the Invention

[0003] To overcome the problems existing in the related art, the present disclosure provides a mobile terminal.

[0004] According to the first aspect of the embodiments of the present disclosure, there is provided a mobile terminal, which includes: a flexible screen and two middle frames. The two middle frames are rotatably connected to each other so that the mobile terminal has an outward folding position and an inward folding position. The flexible screen is laid on the outer surfaces of the two middle frames. Rotating shaft assemblies are respectively provided at the connection parts of the two middle frames. Each of the rotating shaft assemblies includes a first rotating shaft and a transmission mechanism. The transmission mechanism is respectively connected to the first rotating shaft and the middle frame, and the transmission mechanism is configured such that during the process of the mobile terminal switching between the outward folding position and the inward folding position, the middle frame can move closer to or away from the first rotating shaft in a straight line direction.

[0005] Optionally, the transmission mechanism includes a sliding bracket, and a gear set and a rack that are meshed and driven. The middle frame is slidably connected to the sliding bracket. The rack is fixedly arranged on the middle frame, and the gear set is arranged on the sliding bracket. The transmission mechanism is configured to be able to rotate as a whole around the axis where the first rotating shaft is located, and the gear set and the rack are meshed and driven with each other during the rotation around the first rotating shaft.

[0006] Optionally, the gear set includes a first gear, a second gear, and a third gear that are sequentially meshed and fixedly arranged on the sliding bracket. The first gear has a driving force for driving the second gear to rotate during the rotation around the first rotating shaft. The third gear is meshed with the second gear and the rack respectively.

[0007] Optionally, the third gear includes a transmission part configured as a disc for meshing with the second gear, and a swing part configured as a fan for meshing with the rack, and the swing part is offset along the end face of the transmission part.

[0008] Optionally, the sliding bracket includes a first mounting part for mounting the middle frame, the first mounting part is provided with a first strip-shaped groove extending along the movement direction of the middle frame, and the middle frame is provided with a first bump for cooperating with the first strip-shaped groove and capable of moving in the first strip-shaped groove.

[0009] Optionally, the sliding bracket further includes a second mounting part, the second mounting part is provided with a second strip-shaped groove extending along the movement direction of the middle frame, the middle frame is provided with a third strip-shaped groove extending along the movement direction of the middle frame and corresponding to the second strip-shaped groove in position, and the rack is provided with a second bump for sequentially passing through the second strip-shaped groove and the third strip-shaped groove.

[0010] Optionally, an elastic member is provided between the sliding bracket and the middle frame, and the elastic member has an elastic force for pushing the middle frame away from the sliding bracket.

[0011] Optionally, the rotating shaft assembly further includes two mutually meshing fourth gears, the fourth gears are rotatably sleeved on the first rotating shaft, the first gear includes a first meshing part for meshing with the second gear and a second meshing part for meshing with the fourth gear, and the second meshing part is offset along the end face of the first meshing part.

[0012] Optionally, the mobile terminal further includes a first transfer board and a second transfer board respectively sleeved outside the two rotating shaft assemblies, and a third transfer board sleeved outside the two fourth gears, and the first transfer board is hinged to the third transfer board and the second transfer board is hinged to the third transfer board.

[0013] Optionally, the mobile terminal is a folding screen mobile phone.

[0014] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: The mobile terminal has two folding positions that can meet different needs of users. During the process of the mobile terminal switching from the outward folding position to the inward folding position, in order to adapt to the different bending radii of the flexible screen in the two folding positions, the rotating shaft assembly drives the middle frame to move linearly, so that the flexible screen always has an appropriate tension force, avoiding excessive tension or slack.

[0015] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Description of the Drawings

[0016] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present disclosure and, together with the specification, are used to explain the principles of the present disclosure.

[0017] Figure 1 is a schematic structural diagram of a mobile terminal shown according to an exemplary embodiment, where the mobile terminal is in an outward folding position;

[0018] Figure 2 is Figure 1 a schematic structural diagram of the mobile terminal in after removing the flexible screen;

[0019] Figure 3 is Figure 2 a schematic structural diagram of the mobile terminal in after removing the transfer board;

[0020] Figure 4 is a front view of a rotating shaft assembly shown according to an exemplary embodiment;

[0021] Figure 5 is a rear view of a rotating shaft assembly shown according to an exemplary embodiment;

[0022] Figure 6 is Figure 5 a partially enlarged schematic diagram of ;

[0023] Figure 7 is a schematic structural diagram of a third gear shown according to an exemplary embodiment;

[0024] Figure 8 is a schematic structural diagram of a rack shown according to an exemplary embodiment;

[0025] Figure 9 is a schematic structural diagram of a sliding bracket shown according to an exemplary embodiment;

[0026] Figure 10 is an assembly schematic diagram of a middle frame and a sliding bracket shown according to an exemplary embodiment;

[0027] Figure 11 is Figure 10 an assembly schematic diagram of the middle frame and the sliding bracket at another angle in ;

[0028] Figure 12 is a schematic diagram of a mobile terminal in an outward folding position shown according to an exemplary embodiment;

[0029] Figure 13 is a schematic diagram of a mobile terminal in an inward folding position shown according to an exemplary embodiment.

[0030] Description of Reference Numerals

[0031] 1 - Flexible screen, 2 - Middle frame, 21 - First bump, 22 - Third strip-shaped groove, 3 - Rotating shaft assembly, 31 - First rotating shaft, 32 - Transmission mechanism, 321 - First gear, 3211 - First meshing portion, 3212 - Second meshing portion, 322 - Second gear, 323 - Third gear, 3231 - Transmission portion, 3232 - Swing portion, 324 - Rack, 3241 - Rack portion, 3242 - Second bump, 3243 - First elastic member mounting seat, 3244 - Anchoring point, 33 - Sliding bracket, 331 - First mounting portion, 3311 - First strip-shaped groove, 332 - Second mounting portion, 3321 - Second strip-shaped groove, 3322 - Second elastic member mounting seat, 34 - Fourth gear, 35 - Elastic member, 36 - Second rotating shaft, 37 - Swing arm, 41 - First transfer plate, 42 - Second transfer plate, 43 - Third transfer plate. Detailed implementation mode

[0032] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation modes described in the following exemplary embodiments do not represent all implementation modes consistent with the present disclosure. On the contrary, they are only examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0033] In the case of no contrary description, the orientation terms such as "upper, lower, left, right" are defined according to the directions indicated by the corresponding drawings, and "inner" and "outer" refer to the inside and outside of the contour of the corresponding component itself. In addition, the terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another, and do not have sequentiality and importance.

[0034] As Figures 1 to 13 shown, the present disclosure provides a mobile terminal, which includes but is not limited to electronic devices such as mobile phones, laptop computers, and tablet computers, especially electronic devices with foldable screens. The mobile terminal includes a flexible screen 1 and two middle frames 2. Among them, the two middle frames 2 are rotatably connected to each other so that the mobile terminal has an outward folding position and an inward folding position, and the flexible screen 1 is laid on the outer surfaces of the two middle frames 2. Figure 12 and Figure 13Schematic diagrams showing the mobile terminal in the outward folding position and the inward folding position are respectively presented. In the outward folding position, the two middle frames 2 are folded in half, and the flexible screen 1 is exposed outside the mobile terminal. At this time, the folding radius of the flexible screen is denoted as R1. In the inward folding position, the two middle frames 2 are folded in half, and the flexible screen is hidden inside the mobile terminal. At this time, the folding radius of the flexible screen is denoted as R2. The different folding positions of the mobile terminal can meet different needs of users. For example, in the outward folding position, it can achieve conventional miniaturized single-handed operation, that is, rapid information browsing. In the inward folding position, it can protect the flexible screen 1 or be equipped with functional components that are less dependent on the screen.

[0035] Through comparison, it can be seen that the folding radius R1 corresponding to the outward folding position is greater than the folding radius R2 corresponding to the inward folding position. Since the external dimension of the flexible screen 1 is constant, when in the outward folding position, due to the large folding radius, the flexible screen 1 is in an over-tensioned state, while when in the inward folding position, due to the small folding radius, the flexible screen 1 is in an over-relaxed state. Therefore, it is necessary to make the flexible screen always have an appropriate tension force during the process of switching between the two folding positions. For this purpose, the mobile terminal of the present disclosure is provided with two rotating shaft assemblies 3 at the connection of the two middle frames 2, and one middle frame 2 is respectively connected to one rotating shaft assembly 3. Among them, each rotating shaft assembly 3 includes a first rotating shaft 31 and a transmission mechanism 32, and the transmission mechanism 32 is respectively connected to the first rotating shaft 31 and the middle frame 2. The transmission mechanism 32 is configured such that during the process of the mobile terminal switching between the outward folding position and the inward folding position, the middle frame 2 can move closer to or away from the first rotating shaft 31 in a straight line direction.

[0036] It should be understood that in order to improve the stability of transmission, multiple groups of rotating shaft assemblies 3 can be arranged at multiple positions at the connection of the middle frames 2. For example, Figure 2 and Figure 3 are shown as having rotating shaft assemblies 3 provided at both ends along the flipping axis. Of course, the rotating shaft assemblies 3 can be not limited to two groups, and are specifically configured according to actual needs.

[0037] During the process of the mobile terminal switching between the outward folding position and the inward folding position, the dynamic balance of the tension force of the flexible screen 1 is achieved through the movement of the middle frame 2. For example, during the process of switching from the inward folding position to the outward folding position, the folding radius gradually increases, and the tension force received by the flexible screen 1 also gradually increases. At this time, the middle frame 2 moves closer to the first rotating shaft 31 in a straight line direction, thereby driving the originally over-tensioned flexible screen 1 to return to an appropriate tension state. The principle of switching from the outward folding position to the inward folding position is the same as the above, only the process is opposite, and it will not be elaborated here. It should be noted that there is also an unfolded state between the two folding states to meet the use of users with large-screen display requirements.

[0038] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: The mobile terminal has two folding positions that can meet different user needs. During the process of the mobile terminal switching from the outer folding position to the inner folding position, in order to adapt to the different bending radii of the flexible screen 1 in the two folding positions, the rotating shaft assembly 3 drives the middle frame 2 to move in a straight line. Specifically, the transmission mechanism 32 drives the middle frame 2 to approach or move away from the first rotating shaft 31 in a straight line direction, so that the flexible screen 1 always has an appropriate tension force to avoid excessive tension or slackness.

[0039] The present disclosure does not limit the specific implementation manner of the transmission mechanism 32 driving the middle frame 2 to move in a straight line direction. Any structure or method capable of realizing this function can be applied to the present disclosure. According to an embodiment of the present disclosure, reference may be made simultaneously to Figures 4 to 6 , the transmission mechanism 32 may include a sliding bracket 33, and a gear set and a rack 324 that mesh with each other. The middle frame 2 is slidably connected to the sliding bracket 33. The rack 324 is fixedly arranged on the middle frame 2, and the gear set is arranged on the sliding bracket 33. It should be noted that the position of the sliding bracket 33 relative to the first rotating shaft 31 in the straight line direction is fixed, that is, the sliding bracket 33 does not approach or move away from the first rotating shaft 31 as the folding position is switched, while the middle frame 2 is slidably mounted on the sliding bracket 33 relative to the sliding bracket 33. The transmission mechanism 32 is configured to be able to rotate as a whole around the axis where the first rotating shaft 31 is located, and the gear set and the rack 324 mesh and drive each other during the rotation around the first rotating shaft 31.

[0040] Imagewise, during the process of the mobile terminal switching the folding position, the transmission mechanism 32 can rotate as a whole around the axis where the first rotating shaft 31 is located, that is, "revolve". At the same time, the gears in the gear set mesh with each other through "self-rotation", and the gear at the end of the gear set meshes with the rack 324. Since the rack 324 is fixedly arranged on the middle frame 2, the middle frame 2 connected thereto can be driven to move together during the process of the rack 324 being driven by the gear set. In addition to using a gear-rack to transmit power, in some other embodiments, the transmission mechanism 32 can also adopt, for example, a four-bar linkage mechanism, which can also achieve the purpose of driving the middle frame 2 to approach or move away from the first rotating shaft 31 in a straight line direction, and details are not described here.

[0041] Continue to refer to Figures 4 to 6 , the gear set may include a first gear 321, a second gear 322, and a third gear 323 that are sequentially meshed and fixedly arranged on the sliding bracket 33. The first gear 321 has a driving force for driving the second gear 322 to rotate during the rotation around the first rotating shaft 31. The third gear 323 meshes with the second gear 322 and the rack 324 respectively. To improve the reliability of the meshing transmission of the gears in the gear set, adjacent two gears can be connected by a swing arm 37.

[0042] The first gear 321 functions as a driving gear, providing power for the operation of the entire gear set. The power source of the first gear 321 can be, for example, generated by meshing with the fourth gear 34 in the following embodiment during the folding process, or a long shaft that can rotate during the folding process can be provided on the first gear 321, and the first gear 321 is sleeved and can rotate together with the long shaft. Taking the switch from the inner-fold position to the outer-fold position as an example, as Figures 4 to 6 shown, the first gear 321 rotates counterclockwise by itself, and the second gear 322 meshing with it rotates clockwise by itself. At the same time, the third gear 323 meshing with the second gear 322 rotates clockwise. As the third gear 323 rotates, it drives the rack 324 meshing with the third gear 323 to move in a straight line direction.

[0043] As Figure 7 shown, the third gear 323 can include a transmission part 3231 configured as a disc shape for meshing with the second gear 322, and a swing part 3232 configured as a fan shape for meshing with the rack 324. The swing part 3232 is offset along the end face of the transmission part 3231. This design for the third gear 323 enables the same gear to both achieve meshing with the adjacent second gear 322 and drive the rack 324, so as to reduce the number of required components and save the occupied space, providing the possibility for further reducing the thickness of the mobile terminal. In addition, the arc length design of the swing part 3232 can be used to adjust the movement distance of the driven rack 324. The transmission part 3231 and the swing part 3232 can be integrally formed by injection molding or the like, or two independent components can be assembled together, which is not limited here.

[0044] As an embodiment capable of realizing the sliding connection between the sliding bracket 33 and the middle frame 2, referring to Figures 9 to 11 simultaneously, the sliding bracket 33 can include a first mounting part 331 for mounting the middle frame 2. The first mounting part 331 is provided with a first strip-shaped groove 3311 extending along the movement direction of the middle frame 2. The middle frame 2 is provided with a first convex block 21 for cooperating with the first strip-shaped groove 3311 and capable of moving in the first strip-shaped groove 3311. The functions of the first strip-shaped groove 3311 and the first convex block 21 here are similar to those of a slide rail and a slider. The first convex block 21 is inserted into the first strip-shaped groove 3311 and can slide in a straight line direction in the first strip-shaped groove 3311. That is, the first strip-shaped groove 3311 provides a limiting space for the sliding of the first convex block 21, thereby limiting the movement direction of the entire middle frame 2. In addition, the sliding distance of the middle frame 2 can be limited by designing the length of the first strip-shaped groove 3311. As Figures 4 to 6 shown, when the mobile terminal is in the outer-fold position, the middle frame 2 is exactly at the leftmost limit position. Similarly, it can be designed such that when the mobile terminal is in the inner-fold position, the middle frame 2 is exactly at the rightmost limit position.

[0045] Further, the sliding bracket 33 may further include a second mounting portion 332. The second mounting portion 332 is provided with a second strip-shaped groove 3321 extending along the moving direction of the middle frame 2. The middle frame 2 is provided with a third strip-shaped groove 22 extending along the moving direction of the middle frame 2 and corresponding to the second strip-shaped groove 3321 in position. The rack 324 is provided with a second protrusion 3242 for sequentially passing through the second strip-shaped groove 3321 and the third strip-shaped groove 22. As Figure 8 shown, the rack 324 may be configured as a strip-shaped block, and the second protrusion 3242 and the rack portion 3241 for meshing with the third gear 323 are integrally formed on the strip-shaped block. Among them, the rack portion 3241 is formed on the bottom surface of the strip-shaped block, and the second protrusion 3242 is formed on the side surface. Since the second protrusion 3242 is configured to be inserted in a direction perpendicular to the strip-shaped groove, it still has a tendency to slide along the extending direction of the strip-shaped groove relative to the strip-shaped groove. In order to make the position of the rack 324 relative to the middle frame 2 relatively fixed, an anchoring point 3244 may be provided, including an insertion strip formed on the rack and a slot formed on the middle frame 2. The insertion strip is inserted into the slot along a direction perpendicular to the extending direction of the strip-shaped groove. In this way, the fixed connection between the middle frame 2 and the rack 324 can be realized through the cooperation of the second protrusion 3242 and the anchoring point 3244, and the movement of the middle frame relative to the sliding bracket 33 will not be affected.

[0046] An elastic member 35 may be provided between the sliding bracket 33 and the middle frame 2. The elastic member 35 has an elastic force that pushes the middle frame 2 away from the sliding bracket 33. Optionally, the elastic member 35 may be a compression spring. To facilitate the installation of the elastic member 35, as Figure 9 and Figure 10 shown, an elastic member second mounting seat 3322 is provided on the sliding bracket 33. Correspondingly, an elastic member first mounting seat 3243 is provided on the rack 324. After assembly, the elastic member 35 is placed between the first mounting seat 3243 and the second mounting seat 3322. By providing the elastic member 35, it can provide assistance for the mobile terminal to switch from one folding position to another folding position, making the folding easier and more labor-saving. And by respectively using the sliding bracket 33 and the rack 324 to form the mounting parts for installing the elastic member 35, the number of components can also be reduced.

[0047] In order to enable the two middle frames 2 to rotate synchronously, according to an embodiment of the present disclosure, as Figures 4 to 6As shown, the rotating shaft assembly 3 may further include two meshing fourth gears 34. The fourth gears 34 are rotatably sleeved on the first rotating shaft 31. Here, the two fourth gears 34 function as synchronous gears, enabling the two middle frames 2 to rotate synchronously. The first gear 321 includes a first meshing portion 3211 for meshing with the second gear 322 and a second meshing portion 3212 for meshing with the fourth gear 34. The second meshing portion 3212 is offset along the end face of the first meshing portion 3211. Similar to the aforementioned third gear 323, this design of the first gear 321 is used to enable the same gear to mesh with the second gear 322 while driving the fourth gear 34 to rotate, reducing the number of required components.

[0048] When the mobile terminal switches from one folding position to another, the specific transmission process is as follows: The gear set including the first gear 321 rotates "revolutely" around the first rotating shaft 31 as a whole. At the same time, the "rotation" of the first gear 321 drives the second gear 322 and the fourth gear 34 to rotate. The meshing transmission between the two fourth gears 34 enables the two middle frames 2 to rotate synchronously.

[0049] As Figure 3 shown, the fourth gear 34 is sleeved on the first rotating shaft 31, and the first gear 321 is sleeved on the second rotating shaft 36. Such first rotating shaft 31 and second rotating shaft 36 can be regarded as mounting shafts, which do not themselves achieve self-rotation around the shaft. Also referring to Figure 2 , the mobile terminal may further include a first transfer plate 41 and a second transfer plate 42 respectively sleeved outside the two rotating shaft assemblies 3, and a third transfer plate 43 sleeved outside the two fourth gears 34. The first transfer plate 41 and the third transfer plate 43 are hinged between each other, and the second transfer plate 42 and the third transfer plate 43 are hinged between each other. That is, the two middle frames 2 are structurally rotatably connected as a whole terminal through the hinged transfer plates. The transfer plates can be hinged through a hinge structure. Also referring to Figure 5 and Figure 6 , the two ends of the transfer plate are folded and wound around the rotating shaft. For example, the two ends of the first transfer plate 41 and the second transfer plate 42 are respectively folded and wound around the first scroll shaft 31 and the second rotating shaft 36, and the two ends of the third transfer plate 43 are respectively folded and wound around two adjacent first rotating shafts 31.

[0050] After considering the specification and practicing the present disclosure, those skilled in the art will readily think of other embodiments of the present disclosure. This application aims to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include well-known knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0051] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A mobile terminal, characterized in that, The mobile terminal includes: a flexible screen (1) and two middle frames (2). The two middle frames (2) are rotatably connected to each other so that the mobile terminal has an outward folding position and an inward folding position. The flexible screen (1) is laid on the outer surfaces of the two middle frames (2). Rotating shaft assemblies (3) are respectively arranged at the connection parts of the two middle frames (2). Wherein, each rotating shaft assembly (3) includes a first rotating shaft (31) and a transmission mechanism (32). The transmission mechanism (32) is respectively connected to the first rotating shaft (31) and the middle frame (2), and the transmission mechanism (32) is configured such that during the switching process between the outward folding position and the inward folding position of the mobile terminal, the middle frame (2) can approach or move away from the first rotating shaft (31) in a linear direction, wherein: The transmission mechanism (32) includes: a sliding bracket (33), and a gear set and a rack (324) that are meshed and driven. The rack (324) is fixedly arranged on the middle frame (2). The gear set is arranged on the sliding bracket (33). The transmission mechanism (32) is configured to be able to rotate as a whole around the axis where the first rotating shaft (31) is located. And the gear set and the rack (324) are meshed and driven with each other during the rotation around the first rotating shaft (31). The sliding bracket (33) includes a first mounting portion (331) and a second mounting portion (332). Wherein, a first strip-shaped groove (3311) extending along the movement direction of the middle frame (2) is formed in the first mounting portion (331). The middle frame (2) is provided with a first bump (21) for cooperating with the first strip-shaped groove (3311) and capable of moving in the first strip-shaped groove (3311). A second strip-shaped groove (3321) extending along the movement direction of the middle frame (2) is formed in the second mounting portion (332). A third strip-shaped groove (22) extending along the movement direction of the middle frame (2) and corresponding to the second strip-shaped groove (3321) in position is formed in the middle frame (2). The rack (324) is provided with a second bump (3242) for sequentially passing through the second strip-shaped groove (3321) and the third strip-shaped groove (22).

2. The mobile terminal according to claim 1, wherein The gear set includes a first gear (321), a second gear (322), and a third gear (323) that are sequentially meshed and fixedly arranged on the sliding bracket (33). The first gear (321) has a driving force for driving the second gear (322) to rotate during the rotation around the first rotating shaft (31). The third gear (323) is meshed with the second gear (322) and the rack (324) respectively.

3. The mobile terminal according to claim 2, wherein The third gear (323) includes a transmission portion (3231) configured as a disk shape for meshing with the second gear (322), and a swing portion (3232) configured as a fan shape for meshing with the rack (324). The swing portion (3232) is offset along the end face of the transmission portion (3231).

4. The mobile terminal according to claim 1, characterized in that, An elastic member (35) is disposed between the sliding bracket (33) and the middle frame (2), and the elastic member (35) has an elastic force that pushes the middle frame (2) away from the sliding bracket (33).

5. The mobile terminal according to claim 2, characterized in that The rotating shaft assembly (3) further includes two meshing fourth gears (34). The fourth gears (34) are rotatably sleeved on the first rotating shaft (31). The first gear (321) includes a first meshing portion (3211) for meshing with the second gear (322) and a second meshing portion (3212) for meshing with the fourth gear (34). The second meshing portion (3212) is offset along the end face of the first meshing portion (3211).

6. The mobile terminal according to claim 5, wherein The mobile terminal further includes a first transfer board (41) and a second transfer board (42) respectively sleeved outside the two rotating shaft assemblies (3), and a third transfer board (43) sleeved outside the two fourth gears (34). The first transfer board (41) and the third transfer board (43) are hinged, and the second transfer board (42) and the third transfer board (43) are hinged.

7. The mobile terminal according to claim 1, characterized in that, The mobile terminal is a folding screen mobile phone.

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