Rotating shaft mechanism and electronic device

Abstract

Provided are a rotating shaft mechanism (11) and an electronic device (10). The rotating shaft mechanism (11) comprises a first base (111), a second base (112), a first housing fixing frame (113), a second housing fixing frame (114), a third housing fixing frame (115), a first rotating mechanism (116), a second rotating mechanism (117), and a linkage gear member (118). The second housing fixing frame (114) is rotatably connected between the first base (111) and the second base (112). The first housing fixing frame (113) is rotatably connected to the side of the first base (111) facing away from the second housing fixing frame (114). The third housing fixing frame (115) is rotatably connected to the side of the second base (112) facing away from the second housing fixing frame (114). The first rotating mechanism (116) is disposed at the first base (111), and the second rotating mechanism (117) is disposed at the second base (112). The linkage gear member (118) is disposed on the second housing fixing frame (114), and separately engages with a second gear connecting rod (1164) and a third gear connecting rod (1171) for transmission. Whether the first housing fixing frame (113) or the third housing fixing frame (115) is folded first, the linkage gear member (118) can achieve rotational linkage between the first housing fixing frame (113) and the third housing fixing frame (115), thereby enabling linked folding of the electronic device (10).

Description

Rotating shaft mechanism and electronic equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on August 1, 2023, with application number 202310963260.8 and application name “A rotating shaft mechanism and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of electronic equipment, and in particular to a rotating shaft mechanism and electronic equipment. Background Art

[0004] With the gradual maturity of flexible display technology, the display mode of electronic devices has undergone tremendous changes. Foldable flexible screen mobile phones, foldable flexible screen tablets, and wearable electronic devices with foldable flexible screens are an important evolution direction of future smart electronic devices.

[0005] To simultaneously meet users' demands for large displays and portability in foldable electronic devices, tri-folding devices are gradually being used in people's daily lives. In one tri-folding device, the device includes a flexible display, a first hinge mechanism, and a second hinge mechanism. The flexible display includes a first display unit, a second display unit, and a third display unit, wherein the second display unit is located between the first and third display units. The first display unit can be unfolded or folded relative to the second display unit via the first hinge mechanism, and the third display unit can be unfolded or folded relative to the second display unit via the second hinge mechanism. Furthermore, when the tri-folding device is in the folded state, the first and third display units are stacked in sequence on the same side of the second display unit. However, when folding, users may fold the first and third display units in the wrong order, which can damage the flexible display.

[0006] Summary of the Invention

[0007] The present application provides a hinge mechanism and an electronic device to achieve linked folding of the electronic device.

[0008] In a first aspect, the present application provides a rotating shaft mechanism. The rotating shaft mechanism may specifically include a first base, a second base, a first housing mount, a second housing mount, a third housing mount, a first rotating mechanism, a second rotating mechanism, and a linkage gear member. Specifically, the first base and the second base are arranged parallel to each other. The second housing mount is rotationally connected between the first base and the second base, the first housing mount is rotationally connected to the side of the first base facing away from the second housing mount, and the third housing mount is rotationally connected to the side of the second base facing away from the second housing mount. The first rotating mechanism may specifically include a first rotating gear, a second rotating gear, a first gear connecting rod, and a second gear connecting rod. The first rotating gear and the second rotating gear are meshed, and the first rotating gear and the second rotating gear are respectively rotationally connected to the first base, with the second rotating gear being located on the side of the first rotating gear facing away from the first housing mount. One end of the first gear connecting rod is meshed with the first rotating gear, and the other end is slidably connected to the first housing mount. One end of the second gear connecting rod is meshed with the second rotating gear, and the other end is slidably connected to the second housing mount. The second rotating mechanism includes a third rotating gear, a fourth rotating gear, a third gear connecting rod, and a fourth gear connecting rod. The third rotating gear and the fourth rotating gear are meshed, and the third rotating gear and the fourth rotating gear are respectively rotatably connected to the second base, and the fourth rotating gear is located on the side of the third rotating gear facing away from the second housing fixing frame. One end of the third gear connecting rod is meshed with the third rotating gear, and the other end is slidably connected to the second housing fixing frame. One end of the fourth gear connecting rod is meshed with the fourth rotating gear, and the other end is slidably connected to the third housing fixing frame. The sliding trajectory of the second gear connecting rod relative to the second housing fixing frame is parallel to and does not overlap with the sliding trajectory of the third gear connecting rod relative to the second housing fixing frame. A linkage gear member is disposed on the second housing fixing frame, the linkage gear member is located between the second gear connecting rod and the third gear connecting rod, and the second gear connecting rod and the third gear connecting rod are respectively meshed with the linkage gear member for transmission.

[0009] The hinge mechanism of the present application is used in a foldable electronic device. When folding the electronic device, an external force can be applied to the first housing mount or the third housing mount. When the external force is applied to the first housing mount, the first housing mount rotates toward the second housing mount, causing the first gear link to slide relative to the first housing mount and causing the first rotating gear, the second rotating gear, and the second gear link to rotate synchronously with the first gear link. During this synchronous rotation, the second gear link can slide on the second housing mount away from the second base and, through a linkage gear member, drive the third gear link to slide away from the first base, thereby driving the third rotating gear, the fourth rotating gear, and the fourth gear link to rotate synchronously with the third gear link, causing the third gear link to slide relative to the third housing mount, thereby causing the third housing mount to rotate toward the second housing mount. When the external force is applied to the third housing mount, the third housing mount rotates toward the second housing mount, causing the fourth gear link to slide relative to the third housing mount and causing the fourth rotating gear, the third rotating gear, and the third gear link to rotate synchronously. During this synchronous rotation, the third gear link can slide on the second housing fixing frame in a direction away from the first base, and the linkage gear member drives the second gear link to slide in a direction away from the second base, thereby driving the second rotating gear, the first rotating gear, and the first gear link to rotate synchronously with the second gear link, so that the first gear link slides relative to the first housing fixing frame, and then the first housing fixing frame rotates in a direction closer to the second housing fixing frame. Therefore, whether the first housing fixing frame is folded first or the third housing fixing frame is folded first, the linkage gear member can achieve the linkage rotation of the first housing fixing frame and the third housing fixing frame relative to the second housing fixing frame, thereby achieving the linkage folding of the electronic device.

[0010] In some technical solutions, a linkage gear member can implement a linkage function. Specifically, the linkage gear member can include at least one first linkage gear. The first linkage gear has first teeth. The first linkage gear enables the second gear connecting rod and the third gear connecting rod to slide on the second housing mounting bracket to have equal sliding distances.

[0011] In some other technical solutions, the linkage gear member can simultaneously realize the linkage function and the differential function. Specifically, the linkage gear member may include at least one second linkage gear. The second linkage gear is provided with a second tooth on the side facing the second gear connecting rod, and the second linkage gear is provided with a third tooth on the side facing the third gear connecting rod. When the second gear connecting rod and the third gear connecting rod slide on the second housing fixing frame, since the second tooth is different from the third tooth, the sliding distance of the second gear connecting rod on the second housing fixing frame is different from the sliding distance of the third gear connecting rod on the second housing fixing frame, thereby making the rotation speed of the first housing fixing frame around the first base different from the rotation speed of the third housing fixing frame around the second base, thereby realizing differential rotation of the first housing fixing frame and the third housing fixing frame.

[0012] In order to achieve the above-mentioned difference between the second teeth and the third teeth, specifically, at least one of the number of teeth, module, tooth pitch, and pitch circle diameter of the second teeth and the third teeth may be different.

[0013] When the linkage gear member makes the sliding distances of the second gear connecting rod and the third gear connecting rod on the second housing fixing frame equal, the rotating shaft mechanism may also include a first differential mechanism and a second differential mechanism. Specifically, the first differential mechanism includes a first rotating shaft, a first rotating member, and a second rotating member. The first rotating shaft is arranged on the first base, the first rotating member is rotationally connected between the first housing fixing frame and the first rotating shaft, and the second rotating member is rotationally connected between the second housing fixing frame and the first rotating shaft. The second differential mechanism includes a second rotating shaft, a third rotating member, and a fourth rotating member. The second rotating shaft is arranged on the second base, the third rotating member is rotationally connected between the second housing fixing frame and the second rotating shaft, and the fourth rotating member is rotationally connected between the third housing fixing frame and the second rotating shaft. By setting the rotation radius of the first differential mechanism to be different from the rotation radius of the second differential mechanism, differential rotation of the first housing fixing frame and the third housing fixing frame is achieved.

[0014] When specifically setting up the first differential mechanism, in some technical solutions, the first rotating member can be a first connecting rod, and the second rotating member can be a second connecting rod. Alternatively, in some other technical solutions, the first rotating member can be a first arc arm, and a first arc guide groove is provided on the side of the first rotating shaft close to the first arc arm. The first arc arm can be accommodated in the first arc guide groove, and the first rotating member can be rotationally connected to the first rotating shaft by sliding the first arc arm in the first arc guide groove. Correspondingly, the second rotating member can be a second arc arm, and a second arc guide groove is provided on the side of the first rotating shaft close to the second arc arm. The second arc arm can be accommodated in the second arc guide groove, and the second arc arm can be rotationally connected to the first rotating shaft by sliding the second arc arm in the second arc guide groove.

[0015] Similarly, when specifically setting up the second differential mechanism, in some technical solutions, the third rotating member can be a third connecting rod, and the fourth rotating member can be a fourth connecting rod. Alternatively, in some other technical solutions, the third rotating member can be a third arc arm, and a third arc guide groove is provided on the side of the second rotating shaft close to the third arc arm. The third arc arm can be accommodated in the third arc guide groove, and the third rotating member can be rotationally connected to the second rotating shaft by sliding the third arc arm in the third arc guide groove. The fourth rotating member can be a fourth arc arm, and a fourth arc guide groove is provided on the side of the second rotating shaft close to the fourth arc arm. The fourth arc arm can be accommodated in the fourth arc guide groove, and the fourth arc arm can be rotationally connected to the second rotating shaft by sliding the fourth arc arm in the fourth arc guide groove.

[0016] The second housing mount has a midplane. To set the rotation radius of the first differential mechanism to be different from the rotation radius of the second differential mechanism, specifically, when the rotating shaft mechanism is in a flattened state, along the thickness direction of the second housing mount, a first distance is defined between the rotation axis of the first rotating member and the midplane, a second distance is defined between the rotation axis of the second rotating member and the midplane, and the first and second distances are equal; a third distance is defined between the rotation axis of the third rotating member and the midplane, a fourth distance is defined between the rotation axis of the fourth rotating member and the midplane, and the third and fourth distances are equal, and the first and third distances are unequal. Furthermore, the rotation radius of the first rotating shaft around the second housing mount is also defined to be different from the rotation radius of the second rotating shaft around the second housing mount.

[0017] In the specific configuration of the first rotating mechanism, the first gear connecting rod may include a first tooth segment and a first slider fixedly connected. The first tooth segment meshes with the first rotating gear. The first housing mounting frame has a first sliding groove on the side facing the first gear connecting rod, in which the first slider is received. The first gear connecting rod and the first housing mounting frame slide together in the first sliding groove to achieve a sliding connection. Correspondingly, the second gear connecting rod may include a second tooth segment and a second slider fixedly connected. The second tooth segment meshes with the second rotating gear. The second housing mounting frame has a second sliding groove on the side facing the second gear connecting rod, in which the second slider is received. The second gear connecting rod and the second housing mounting frame slide together in the second sliding groove to achieve a sliding connection. Similarly, in the specific configuration of the second rotating mechanism, the third gear connecting rod may include a third tooth segment and a third slider fixedly connected. The third tooth segment meshes with the third rotating gear. The second housing mounting frame has a third sliding groove on the side facing the third gear connecting rod, in which the third slider is received. The third gear connecting rod and the second housing mounting frame slide together in the third sliding groove to achieve a sliding connection. Accordingly, the fourth gear connecting rod may include a fourth tooth segment and a fourth slider fixedly connected. The fourth tooth segment meshes with the fourth rotating gear. The third housing mounting frame has a fourth sliding groove on a side facing the fourth gear connecting rod. The fourth slider is received in the fourth sliding groove, and the fourth gear connecting rod and the third housing mounting frame are slidably connected by the fourth slider sliding in the fourth sliding groove.

[0018] The second gear connecting rod may be provided with a first rack on the side facing the linkage gear member, the first rack meshing with the linkage gear member. Similarly, the third gear connecting rod may be provided with a second rack on the side facing the linkage gear member, the second rack meshing with the linkage gear member. This enables transmission connection between the linkage gear member and the second and third gear connecting rods.

[0019] In the second aspect, the present application provides an electronic device. The electronic device includes a flexible display, a first shell, a second shell, a third shell and the hinge mechanism of the first aspect above. The first shell is fixedly connected to the first shell fixing frame, the second shell is fixedly connected to the second shell fixing frame, and the third shell is fixedly connected to the third shell fixing frame. The flexible display continuously covers the first shell, the second shell, the third shell and the hinge mechanism, and is fixedly connected to the first shell, the second shell and the third shell respectively. When folding the electronic device, whether the first shell is folded first or the third shell is folded first, the hinge mechanism can realize the linkage of the rotation of the first shell and the third shell relative to the second shell, thereby realizing the linkage folding of the electronic device.

[0020] The electronic device may be an inward-folding electronic device, wherein the rotation axis of the first rotation mechanism about the first base is located on the side of the first base facing the flexible display screen, and the rotation axis of the second rotation mechanism about the second base is located on the side of the second base facing the flexible display screen. Alternatively, the electronic device may be an outward-folding electronic device, wherein the rotation axis of the first rotation mechanism about the first base is located on the side of the first base facing away from the flexible display screen, and the rotation axis of the second rotation mechanism about the second base is located on the side of the second base facing away from the flexible display screen. Alternatively, the electronic device may be a Z-folding device, wherein the rotation axis of the first rotation mechanism about the first base is located on the side of the first base facing the flexible display screen, and the rotation axis of the second rotation mechanism about the second base is located on the side of the second base facing away from the flexible display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic diagram of an electronic device provided in an embodiment of the present application;

[0022] FIG2 is a schematic diagram of a folding electronic device provided in an embodiment of the present application;

[0023] FIG3 is another schematic diagram of folding the electronic device provided in an embodiment of the present application;

[0024] FIG4 is a schematic diagram of a rotating shaft mechanism provided in an embodiment of the present application;

[0025] FIG5 is a schematic diagram of a first rotating mechanism provided in an embodiment of the present application;

[0026] FIG6 is a schematic diagram of a second rotating mechanism provided in an embodiment of the present application;

[0027] FIG7 is a schematic cross-sectional view of the rotating shaft mechanism in FIG4 along the MM direction;

[0028] FIG8 is a schematic cross-sectional view of the rotating shaft mechanism in FIG4 along the NN direction;

[0029] FIG9 is a schematic diagram of the first rotating mechanism in FIG7 ;

[0030] FIG10 is a schematic diagram of the second rotating mechanism in FIG8;

[0031] FIG11 is another schematic diagram of the rotating shaft mechanism provided in an embodiment of the present application;

[0032] FIG12 is a schematic diagram of a first differential mechanism and a second differential mechanism provided in an embodiment of the present application;

[0033] FIG13 is another schematic diagram of the first differential mechanism and the second differential mechanism provided in an embodiment of the present application;

[0034] FIG14 is another schematic diagram of the first differential mechanism and the second differential mechanism provided in an embodiment of the present application;

[0035] FIG15 is another schematic diagram of the first differential mechanism and the second differential mechanism provided in an embodiment of the present application;

[0036] FIG16 is another schematic diagram of the rotating shaft mechanism provided in an embodiment of the present application;

[0037] FIG17 is a schematic diagram of an electronic device in a folded state provided by an embodiment of the present application;

[0038] FIG18 is a schematic diagram of a linkage gear member provided in an embodiment of the present application.

[0039] Reference numerals: 10 - electronic device; 11 - rotating shaft mechanism; 12 - flexible display screen; 13 - first housing; 14 - second housing; 15 - third housing; 111 - first base; 112 - second base; 113 - first housing fixing frame; 114 - second housing fixing frame; 115 - third housing fixing frame; 116 - first rotating mechanism; 117 - second rotating mechanism; 118 - linkage gear member; 119 - first differential mechanism; 110 - second differential mechanism; 1131 - first chute; 1141 - second chute; 1142 - third chute; 1151 - fourth chute; 1161 - first gear connecting rod; 1162 - first rotating gear; 1163 - second rotating gear; 1164 - second gear connecting rod; 1171 - third gear connecting rod; 1172 - third rotating gear; 1173-fourth rotating gear; 1174-fourth gear connecting rod; 1181-first linkage gear; 1182-second linkage gear; 1191-first rotating shaft; 1192-first rotating member; 1193-second rotating member; 1101-second rotating shaft; 1102-third rotating member; 1103-fourth rotating member; 11611-first slider; 11612-first tooth segment; 11641-second tooth segment; 11642-second slider; 11643-first rack; 11711-third slider; 11712-third tooth segment; 11741-fourth tooth segment; 11742-fourth slider; 11713-second rack; 11821-second tooth; 11822-third tooth. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0041] To facilitate understanding of the hinge mechanism provided in the embodiments of the present application, its application scenarios are described below. The hinge mechanism can be applied to, but is not limited to, foldable electronic devices such as mobile phones, smart wearable devices, tablet computers, or laptop computers. When applying the hinge mechanism provided in the embodiments of the present application to electronic devices, reference can be made to FIG1 , which is a schematic diagram of an electronic device provided in the embodiments of the present application. The electronic device 10 provided in the present application is a tri-fold electronic device, and can specifically include a hinge mechanism 11, a flexible display 12, a first housing 13, a second housing 14, and a third housing 15. The second housing 14 is located between the first housing 13 and the third housing 15, and the first housing 13, the second housing 14, and the third housing 15 are respectively connected to the hinge mechanism 11. The flexible display 12 continuously covers the first housing 13, the second housing 14, the third housing 15, and the hinge mechanism 11, and the first housing 13, the second housing 14, and the third housing 15 are respectively fixedly connected to the flexible display 12. In the above-mentioned electronic device 10, the first housing 13 and the third housing 15 can rotate around the second housing 14 under the action of the hinge mechanism 11, thereby realizing the folding and unfolding of the electronic device 10. Figure 2 is a schematic diagram of a folding device according to an embodiment of the present application. As shown in Figure 2, when the electronic device 10 is in the folded state, the first housing 13 and the third housing 15 can be folded onto either side of the second housing 14, respectively, so that the electronic device 10 folds in a Z-shape. Figure 3 is another schematic diagram of the folding device according to an embodiment of the present application. As shown in Figure 3, the first housing 13 and the third housing 15 can also be stacked on the same side of the second housing 14. In this case, the electronic device 10 can be an outward-folding device. That is, when the electronic device 10 is in the folded state, the flexible display 12 can serve as both the display surface and the exterior surface of the electronic device 10. It should be understood that the process of the electronic device 10 moving from the unfolded state to the folded state, or vice versa, is the process of the first housing 13 and the third housing 15 rotating about the hinge mechanism 11. During this process, the flexible display 12 bends or flattens along with the first housing 13 and the third housing 15. Of course, the electronic device 10 described above can also be an inward-folding device. That is to say, the flexible display screen 12 only serves as the display surface of the electronic device 10, and when the electronic device 10 is in a folded state, the first shell 13, the second shell 14 and the hinge mechanism 11 can provide a first teardrop-shaped accommodation space that meets the bending requirements of the flexible display screen 12, and the second shell 14, the third shell 15 and the hinge mechanism 11 can provide a second teardrop-shaped accommodation space that meets the bending requirements of the flexible display screen 12, thereby avoiding pulling or squeezing of the flexible display screen 12, thereby reducing the risk of damage to the flexible display screen 12.

[0042] In some current foldable electronic devices, the first and third housings rotate around the second housing via hinge mechanisms. However, in foldable electronic devices with a folding sequence, users may fold the first and third housings in the wrong order, causing damage to the flexible display, thereby affecting the reliability of the electronic device and the user experience. Therefore, the present application provides a hinge mechanism and electronic device to achieve coordinated folding of the electronic device.

[0043] It should be noted that the terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and claims of this application, the singular expressions "a," "an," "said," "above," "the," and "this" are intended to include expressions such as "one or more," unless the context clearly indicates otherwise.

[0044] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0045] FIG4 is a schematic diagram of a hinge mechanism provided in an embodiment of the present application. As shown in FIG4 , the hinge mechanism 11 includes a first base 111, a second base 112, a first housing fixing frame 113, a second housing fixing frame 114, a third housing fixing frame 115, a first rotating mechanism 116, and a second rotating mechanism 117. The first base 111 and the second base 112 are arranged in parallel. The first housing fixing frame 113 and the second housing fixing frame 114 are arranged on opposite sides of the first base 111 and are respectively rotatably connected to the first base 111. The second housing fixing frame 114 and the third housing fixing frame 115 are arranged on opposite sides of the second base 112 and are respectively rotatably connected to the second base 112. The second housing fixing frame 114 is located between the first base 111 and the second base 112. When the hinge mechanism 11 is applied to the electronic device 10, the first housing 13 is fixedly connected to the first housing fixing frame 113, the second housing 14 is fixedly connected to the second housing fixing frame 114, and the third housing 15 is fixedly connected to the third housing fixing frame 115. In some embodiments, the electronic device 10 may be an inward-folding electronic device, wherein the rotation axis of the first rotation mechanism 116 around the first base 111 may be located on the side of the first base 111 facing the flexible display 12, and the rotation axis of the second rotation mechanism 117 around the second base 112 may be located on the side of the second base 112 facing the flexible display 12. In other embodiments, the electronic device 10 may also be an outward-folding electronic device, wherein the rotation axis of the first rotation mechanism 116 around the first base 111 may be located on the side of the first base 111 facing away from the flexible display 12, and the rotation axis of the second rotation mechanism 117 around the second base 112 may be located on the side of the second base 112 facing away from the flexible display 12. In some other embodiments, the electronic device 10 can also be a Z-shaped folding device, wherein the rotation axis of the first rotating mechanism 116 around the first base 111 is located on the side of the first base 111 facing the flexible display screen 12, and the rotation axis of the second rotating mechanism 117 around the second base 112 is located on the side of the second base 112 away from the flexible display screen 12.

[0046] FIG5 is a schematic diagram of a first rotating mechanism provided in an embodiment of the present application. As shown in FIG5 , the first rotating mechanism 116 may include a first gear link 1161, a first rotating gear 1162, a second rotating gear 1163, and a second gear link 1164. The first rotating gear 1162 and the second rotating gear 1163 are meshed, and the first rotating gear 1162 and the second rotating gear 1163 are respectively rotatably connected to the first base 111, wherein the first rotating gear 1162 is disposed near the first housing fixing frame 113, and the second rotating gear 1163 is disposed near the second housing fixing frame 114. The first gear link 1161 is located between the first housing fixing frame 113 and the first base 111, with one end of the first gear link 1161 being slidably connected to the first housing fixing frame 113, and the other end being meshed with the first rotating gear 1162. The second gear connecting rod 1164 is located between the second housing fixing frame 114 and the first base 111 . One end of the second gear connecting rod 1164 is slidably connected to the second housing fixing frame 114 , and the other end is engaged with the second rotating gear 1163 .

[0047] FIG6 is a schematic diagram of a second rotation mechanism provided in an embodiment of the present application. As shown in FIG6 , the second rotation mechanism 117 may include a third gear link 1171, a third rotating gear 1172, a fourth rotating gear 1173, and a fourth gear link 1174. The third rotating gear 1172 and the fourth rotating gear 1173 are meshed and are respectively rotationally connected to the second base 112, wherein the third rotating gear 1172 is disposed near the second housing fixing frame 114, and the fourth rotating gear 1173 is disposed near the third housing fixing frame 115. The third gear link 1171 is located between the second housing fixing frame 114 and the second base 112, with one end of the third gear link 1171 being slidably connected to the second housing fixing frame 114 and the other end being meshed with the third rotating gear 1172. The fourth gear connecting rod 1174 is located between the third housing fixing frame 115 and the second base 112 . One end of the fourth gear connecting rod 1174 is slidably connected to the third housing fixing frame 115 , and the other end is engaged with the fourth rotating gear 1173 .

[0048] Continuing with FIG4 , the sliding trajectory of the second gear link 1164 relative to the second housing mount 114 is parallel to and does not overlap the sliding trajectory of the third gear link 1171 relative to the second housing mount 114. The shaft mechanism 11 may further include a linkage gear member 118 disposed on the second housing mount 114. The linkage gear member 118 is located between the second gear link 1164 and the third gear link 1171, and meshes with the second gear link 1164 and the third gear link 1171, respectively, for transmission.

[0049] When folding the electronic device 10, the user can apply external force to either the first shell fixing frame 113 or the second shell fixing frame 114. FIG7 is a schematic cross-sectional view of the rotating shaft mechanism in FIG4 along the MM direction. As shown in FIG4 and FIG7, when the user first folds the first shell fixing frame 113, the first shell fixing frame 113 rotates toward the second shell fixing frame 114. At this time, the first gear connecting rod 1161 slides relative to the first shell fixing frame 113 toward the second shell fixing frame 114 (i.e., the direction indicated by arrow C in FIG7), thereby driving the first rotating gear 1162, the second rotating gear 1163, and the second gear connecting rod 1164 to rotate synchronously, so that the second gear connecting rod 1164 slides on the second shell fixing frame 114 in a direction away from the second base 112 (i.e., the direction indicated by arrow A in FIG4 and FIG7). FIG8 is a schematic cross-sectional view of the rotating shaft mechanism in FIG4 along the NN direction. As shown in Figures 4 and 8, when the second gear link 1164 slides relative to the second shell fixing frame 114, the sliding is transmitted to the third gear link 1171 through the linkage gear part 118, and the third gear link 1171 is driven to slide in the second shell fixing frame 114 in the direction away from the first base 111 (i.e., the direction indicated by arrow B in Figures 4 and 8), thereby driving the third rotating gear 1172, the fourth rotating gear 1173 and the fourth gear link 1174 to rotate synchronously, causing the fourth gear link 1174 to slide relative to the third shell fixing frame 115, and then driving the third shell fixing frame 115 to rotate in the direction close to the second shell fixing frame 114 (i.e., the direction indicated by arrow D in Figure 8).

[0050] As shown in Figures 4 and 8, when the user first folds the third housing fixing frame 115, the third housing fixing frame 115 rotates in a direction closer to the second housing fixing frame 114 (i.e., the direction indicated by arrow D in Figure 8). At this time, the fourth gear connecting rod 1174 slides relative to the third housing fixing frame 115, thereby driving the fourth rotating gear 1173, the third rotating gear 1172, and the third gear connecting rod 1171 to rotate synchronously, causing the third gear connecting rod 1171 to slide on the second housing fixing frame 114 in a direction away from the first base 111 (i.e., the direction indicated by arrow B in Figures 4 and 8). As shown in Figures 4 and 7, when the third gear link 1171 slides relative to the second shell fixing frame 114, the sliding is transmitted to the second gear link 1164 through the linkage gear part 118, and drives the second gear link 1164 to slide in the second shell fixing frame 114 in the direction away from the second base 112 (i.e., the direction indicated by arrow A in Figures 4 and 7), thereby driving the second rotating gear 1163, the first rotating gear 1162 and the first gear link 1161 to rotate synchronously, so that the first gear link 1161 slides relative to the first shell fixing frame 113 toward the second shell fixing frame 114 (i.e., the direction indicated by arrow C in Figure 7), thereby driving the first shell fixing frame 113 to rotate in the direction close to the second shell fixing frame 114.

[0051] Therefore, no matter whether the user folds the first shell fixing frame 113 first or the third shell fixing frame 115 first, the linkage gear member 118 can realize the linkage rotation of the first shell fixing frame 113 and the third shell fixing frame 115 relative to the second shell fixing frame 114, thereby realizing the linkage folding of the electronic device 10.

[0052] As shown in FIG5 , when the first rotating mechanism 116 is specifically configured, the first gear connecting rod 1161 may include a first slider 11611 and a first tooth segment 11612, wherein the first tooth segment 11612 is disposed toward the first base 111 and meshes with the first rotating gear 1162, and the first slider 11611 is disposed toward the first housing mount 113. The first housing mount 113 has a first sliding groove 1131 on a side facing the first gear connecting rod 1161. The first slider 11611 is received in the first sliding groove 1131 and slides within the first sliding groove 1131 to achieve a sliding connection between the first gear connecting rod 1161 and the first housing mount 113. Similarly, the second gear connecting rod 1164 may include a second tooth segment 11641 and a second slider 11642, wherein the second tooth segment 11641 is disposed toward the first base 111 and meshes with the second rotating gear 1163, and the second slider 11642 is disposed toward the second housing mount 114. The second housing fixing frame 114 has a second sliding groove 1141 on the side facing the second gear connecting rod 1164. The second slider 11642 is received in the second sliding groove 1141 and slides within the second sliding groove 1141 to achieve a sliding connection between the second gear connecting rod 1164 and the second housing fixing frame 114. As shown in FIG6 , when the second rotating mechanism 117 is specifically configured, the third gear connecting rod 1171 may include a third slider 11711 and a third tooth segment 11712 that are fixedly connected. The third tooth segment 11712 is disposed toward the second base 112 and meshes with the third rotating gear 1172. The third slider 11711 is disposed toward the second housing fixing frame 114. The second housing fixing frame 114 has a third sliding groove 1142 on the side facing the third gear connecting rod 1171. The third slider 11711 is received in the third sliding groove 1142 and slides within the third sliding groove 1142 to achieve a sliding connection between the third gear connecting rod 1171 and the second housing fixing frame 114. Similarly, the fourth gear connecting rod 1174 includes a fourth tooth segment 11741 and a fourth slider 11742 fixedly connected. The fourth tooth segment 11741 is disposed toward the second base 112 and meshes with the fourth rotating gear 1173. The fourth slider 11742 is disposed toward the third housing fixing frame 115. The third housing fixing frame 115 has a fourth sliding groove 1151 on the side facing the fourth gear connecting rod 1174. The fourth slider 11742 is received in the fourth sliding groove 1151 and slides within the fourth sliding groove 1151 to achieve a sliding connection between the fourth gear connecting rod 1174 and the third housing fixing frame 115.

[0053] Figure 9 is a schematic diagram of the first rotation mechanism in Figure 7, and Figure 10 is a schematic diagram of the second rotation mechanism in Figure 8. As shown in Figure 9, when the first housing fixing frame 113 rotates about the first base 111 toward the second housing fixing frame 114 (as indicated by the curved arrow in Figure 9), the first housing fixing frame 113 drives the first gear connecting rod 1161 to rotate about the first base 111, while the first slider 11611 slides in the direction indicated by arrow C within the first sliding groove 1131. During the rotation of the first gear connecting rod 1161, the first tooth segment 11612 drives the first rotating gear 1162, the second rotating gear 1163, and the second tooth segment 11641 to rotate synchronously, thereby causing the second gear connecting rod 1164 to rotate about the first base 111, and simultaneously the second slider 11642 slides in the direction indicated by arrow A within the second sliding groove 1141. As shown in FIG10 , the linkage gear member 118 transmits the sliding movement of the second slider 11642 to the third gear connecting rod 1171, causing the third slider 11711 to slide in the third sliding groove 1142 in the direction indicated by arrow B in FIG10 , thereby driving the third gear connecting rod 1171 to rotate about the second base 112. During the process of the third gear connecting rod 1171 rotating about the second base 112, the third tooth segment 11712 drives the third rotating gear 1172, the fourth rotating gear 1173, and the fourth tooth segment 11741 to rotate synchronously, thereby causing the fourth gear connecting rod 1174 to rotate about the second base 112. Simultaneously, the fourth slider 11742 slides in the fourth sliding groove 1151 in the direction indicated by arrow D, thereby driving the third housing fixing frame 115 to rotate about the second base 112 toward the second housing fixing frame 114 (as indicated by the curved arrow in FIG10 ).

[0054] Continuing with FIG10 , when the third housing fixing frame 115 rotates about the second base 112 toward the second housing fixing frame 114 (as indicated by the curved arrow in FIG10 ), the third housing fixing frame 115 drives the fourth gear connecting rod 1174 to rotate about the second base 112, while the fourth slider 11742 slides in the direction indicated by arrow D within the fourth sliding groove 1151. During the rotation of the fourth gear connecting rod 1174, the fourth tooth segment 11741 drives the fourth rotating gear 1173, the third rotating gear 1172, and the third tooth segment 11712 to rotate synchronously, thereby causing the third gear connecting rod 1171 to rotate about the second base 112, while the third slider 11711 slides in the direction indicated by arrow B within the third sliding groove 1142. As shown in FIG9 , the linkage gear member 118 transmits the sliding movement of the third slider 11711 to the second gear connecting rod 1164, causing the second slider 11642 to slide in the second sliding groove 1141 in the direction indicated by arrow A, thereby driving the second gear connecting rod 1164 to rotate around the first base 111. During the process of the second gear connecting rod 1164 rotating around the first base 111, the second tooth segment 11641 drives the second rotating gear 1163, the first rotating gear 1162, and the first tooth segment 11612 to rotate synchronously, thereby causing the first gear connecting rod 1161 to rotate around the first base 111. Simultaneously, the first slider 11611 slides in the first sliding groove 1131 in the direction indicated by arrow C, thereby driving the first housing fixing frame 113 to rotate around the first base 111 toward the second housing fixing frame 114 (as indicated by the curved arrow in FIG9 ).

[0055] As shown in FIG4 , in the electronic device 10, to achieve linkage, a first rack 11643 is provided on the side of the second gear link 1164 facing the linkage gear member 118, and the first rack 11643 meshes with the linkage gear member 118. A second rack 11713 is provided on the side of the third gear link 1171 facing the linkage gear member 118, and the second rack 11713 meshes with the linkage gear member 118.

[0056] In some embodiments, the linkage gear member 118 may include at least one first linkage gear 1181. For example, as shown in FIG4 , in one specific embodiment, the at least one first linkage gear 1181 may include two first linkage gears 1181, which are arranged along the sliding direction of the second gear connecting rod 1164 and the third gear connecting rod 1171. The first linkage gear 1181 has first teeth. In this embodiment, since the second gear connecting rod 1164 and the third gear connecting rod 1171 are both in transmission connection with the first linkage gear 1181, the sliding distances of the second gear connecting rod 1164 and the third gear connecting rod 1171 on the second housing fixing frame 114 are equal.

[0057] In the electronic device 10 described above, to enable the first housing mount 113 and the third housing mount 115 to fold in a predetermined sequence, the hinge mechanism 11 may further include a first differential mechanism 119 and a second differential mechanism 110. Figure 11 is another schematic diagram of a hinge mechanism according to an embodiment of the present application, and Figure 12 is a schematic diagram of the first and second differential mechanisms according to an embodiment of the present application. As shown in Figures 11 and 12, the first differential mechanism 119 may include a first rotating shaft 1191, a first rotating member 1192, and a second rotating member 1193. The first rotating shaft 1191 is disposed on the first base 111. The first rotating member 1192 is rotatably connected between the first housing mount 113 and the first rotating shaft 1191. The second rotating member 1193 is rotatably connected between the second housing mount 114 and the first rotating shaft 1191. Similarly, the second differential mechanism 110 may include a second rotating shaft 1101, a third rotating member 1102, and a fourth rotating member 1103. The second rotating shaft 1101 is disposed on the second base 112. The third rotating member 1102 is rotatably connected between the second housing fixing frame 114 and the second rotating shaft 1101. The fourth rotating member 1103 is rotatably connected between the third housing fixing frame 115 and the second rotating shaft 1101. The rotation radius of the first differential mechanism 119 is different from the rotation radius of the second differential mechanism 110. That is, the rotation radius of the first differential mechanism 119 is larger than the rotation radius of the second differential mechanism 110, or the rotation radius of the first differential mechanism 119 is smaller than the rotation radius of the second differential mechanism 110.

[0058] In some embodiments, when the rotation radius of the first differential mechanism 119 is smaller than the rotation radius of the second differential mechanism 110, since the sliding distances of the second gear link 1164 and the third gear link 1171 on the second housing fixation frame 114 are equal, the angular velocity of the second differential mechanism 110 rotating around the second housing fixation frame 114 is smaller than the angular velocity of the first differential mechanism 119 rotating around the second housing fixation frame 114, thereby making the rotation speed of the second differential mechanism 110 smaller than the rotation speed of the first differential mechanism 119, and achieving the rotation speed of the third housing fixation frame 115 smaller than the rotation speed of the first housing fixation frame 113. Therefore, when the first shell fixing frame 113 or the third shell fixing frame 115 is pushed to rotate by external force, the above-mentioned first linkage gear 1181 can make the first shell fixing frame 113 and the third shell fixing frame 115 fold in a linked manner, and the first differential mechanism 119 and the second differential mechanism 110 can realize the differential rotation of the first shell fixing frame 113 and the third shell fixing frame 115, so that the first shell fixing frame 113 is first folded to the side of the second shell fixing frame 114, and then the third shell fixing frame 115 is folded to the side of the first shell fixing frame 113 away from the second shell fixing frame 114.

[0059] In some other embodiments, when the rotation radius of the first differential mechanism 119 is greater than the rotation radius of the second differential mechanism 110, since the sliding distances of the second gear link 1164 and the third gear link 1171 on the second housing fixation frame 114 are equal, the angular velocity of the second differential mechanism 110 rotating around the second housing fixation frame 114 is greater than the angular velocity of the first differential mechanism 119 rotating around the second housing fixation frame 114, thereby making the rotation speed of the second differential mechanism 110 greater than the rotation speed of the first differential mechanism 119, and achieving that the rotation speed of the third housing fixation frame 115 is greater than the rotation speed of the first housing fixation frame 113. Therefore, when the first housing fixing frame 113 or the third housing fixing frame 115 is pushed to rotate by external force, the above-mentioned first linkage gear 1181 can make the first housing fixing frame 113 and the third housing fixing frame 115 fold in a linked manner, and the first differential mechanism 119 and the second differential mechanism 110 can realize the differential rotation of the first housing fixing frame 113 and the third housing fixing frame 115, so that the third housing fixing frame 115 is first folded to the side of the second housing fixing frame 114, and then the first housing fixing frame 113 is folded to the side of the third housing fixing frame 115 away from the second housing fixing frame 114.

[0060] Figure 13 is another schematic diagram of the first differential mechanism and the second differential mechanism provided in an embodiment of the present application. As shown in Figure 13, in some embodiments, the first rotating member 1192 may be a first connecting rod, and the second rotating member 1193 may be a second connecting rod. In this embodiment, the first rotating shaft 1191 is fixed to the first base 111. One end of the first connecting rod can be mounted on the first rotating shaft 1191, and the other end can be rotatably connected to the first housing fixing frame 113 via a pin. One end of the second connecting rod can be mounted on the first rotating shaft 1191, and the other end can be rotatably connected to the second housing fixing frame 114 via a pin. In other embodiments, the first rotating shaft 1191 may also be provided with a first receiving slot and a second receiving slot, the first housing fixing frame 113 may be provided with a third receiving slot, and the second housing fixing frame 114 may be provided with a fourth receiving slot. One end of the first connecting rod is received in the first receiving slot and is rotatably connected to the first rotating shaft 1191 by rotating therein. The other end is received in the third receiving slot and is rotatably connected to the first housing fixing frame 113 by rotating therein. One end of the second connecting rod is received in the second receiving slot and is rotatably connected to the first rotating shaft 1191 by rotating therein. The other end is received in the fourth receiving slot and is rotatably connected to the second housing fixing frame 114 by rotating therein. Similarly, the third rotating member 1102 can be the third connecting rod, and the fourth rotating member 1103 can be the fourth connecting rod. In this embodiment, the second rotating shaft 1101 is fixed to the second base 112. One end of the third connecting rod can be sleeved on the second rotating shaft 1101, and the other end can be rotatably connected to the second housing fixing frame 114 via a pin. One end of the third connecting rod can be sleeved on the second rotating shaft 1101, and the other end can be rotatably connected to the third housing fixing frame 115 via a pin. In some other embodiments, the second rotating shaft 1101 may also be provided with a fifth receiving slot and a sixth receiving slot, the second housing fixing frame 114 may be provided with a seventh receiving slot, and the third housing fixing frame 115 may be provided with an eighth receiving slot. One end of the third connecting rod is received in the fifth receiving slot and is rotatably connected to the second rotating shaft 1101 by rotating therein, while the other end is received in the seventh receiving slot and is rotatably connected to the second housing fixing frame 114 by rotating therein. One end of the fourth connecting rod is received in the sixth receiving slot and is rotatably connected to the second rotating shaft 1101 by rotating therein, while the other end is received in the eighth receiving slot and is rotatably connected to the third housing fixing frame 115 by rotating therein.

[0061] FIG14 is another schematic diagram of the first differential mechanism and the second differential mechanism provided in an embodiment of the present application. As shown in FIG14 , in some other embodiments, the first rotating member 1192 may also be a first arcuate arm, with a first arcuate guide groove provided on the side of the first rotating shaft 1191 near the first arcuate arm. The first arcuate arm is accommodated in the first arcuate guide groove and slides within the first arcuate guide groove to achieve rotational connection between the first rotating member 1192 and the first rotating shaft 1191. The second rotating member 1193 may be a second arcuate arm, with a second arcuate guide groove provided on the side of the first rotating shaft 1191 near the second arcuate arm. The second arcuate arm is accommodated in the second arcuate guide groove and slides within the second arcuate guide groove to achieve rotational connection between the second rotating member 1193 and the first rotating shaft 1191. Similarly, the third rotating member 1102 may also be a third arcuate arm, with a third arcuate guide groove provided on the side of the second rotating shaft 1101 proximate to the third arcuate arm. The third arcuate arm is received in the third arcuate guide groove, and sliding in the third arcuate guide groove enables the third rotating member 1102 to be rotationally connected to the second rotating shaft 1101. The fourth rotating member 1103 may also be a fourth arcuate arm, with a fourth arcuate guide groove provided on the side of the second rotating shaft 1101 proximate to the fourth arcuate arm. The fourth arcuate arm is received in the fourth arcuate guide groove, and sliding in the fourth arcuate guide groove enables the fourth rotating member 1103 to be rotationally connected to the second rotating shaft 1101.

[0062] In the present application, differential speed is achieved by setting the rotation radius of the first differential mechanism 119 and the rotation radius of the second differential mechanism 110 to be different. Figure 15 is another schematic diagram of the first differential mechanism and the second differential mechanism provided in an embodiment of the present application. As shown in Figure 15, specifically, the second housing mount 114 has a midplane S. When the rotating shaft mechanism 11 is in a flattened state, along the thickness direction of the second housing mount 114 (i.e., indicated by arrow G in Figure 15), a first distance D1 is defined between the rotation axis O1 of the first rotating member 1192 and the midplane S, and a second distance D2 is defined between the rotation axis O2 of the second rotating member 1193 and the midplane S. The first distance D1 and the second distance D2 are equal. Correspondingly, a third distance D3 is defined between the rotation axis O3 of the third rotating member 1102 and the midplane S, and a fourth distance D4 is defined between the rotation axis O4 of the fourth rotating member 1103 and the midplane S. The third distance D3 and the fourth distance D4 are equal, and the first distance D1 and the third distance D3 are not equal. The rotation radius of the first rotating shaft 1191 around the second housing fixing frame 114 is different from the rotation radius of the second rotating shaft 1101 around the second housing fixing frame 114. In this way, the rotation radius of the first differential mechanism 119 can be different from the rotation radius of the second differential mechanism 110.

[0063] In actual use, when the electronic device 10 is folded from the initial flat state, after the first base 111 rotates 90°, the first shell fixing frame 113 and the second shell fixing frame 114 can be closed. At this time, the second base 112 rotates to a certain angle, as shown in Figure 3. Figure 16 is another schematic diagram of the hinge mechanism provided in an embodiment of the present application. As shown in Figure 16, at this time, the first rack 11643 is disengaged from the linkage gear member 118, so that the second base 112 and the third shell fixing member can continue to rotate, allowing the second rack 11713 to continue to slide with the third gear connecting rod 1171. Figure 17 is a schematic diagram of the electronic device provided in an embodiment of the present application in a folded state. As shown in Figure 17, after the second base 112 rotates to 90°, the third shell fixing frame 115 is superimposed on the side of the first shell fixing frame 113 facing away from the second shell fixing frame 114, thereby achieving the closure of the third shell fixing frame 115 with the first shell fixing frame 113 and the second shell fixing frame 114.

[0064] FIG18 is a schematic diagram of a linkage gear member provided in an embodiment of the present application. As shown in FIG18 , in some other embodiments, the linkage gear member 118 includes at least one second linkage gear 1182. The second linkage gear 1182 is provided with a second tooth 11821 on the side facing the second gear connecting rod 1164, and a third tooth 11822 on the side facing the third gear connecting rod 1171. The second tooth 11821 is different from the third tooth 11822. Specifically, the difference between the second tooth 11821 and the third tooth 11822 may include at least one of the number of teeth, module, tooth pitch, and pitch circle diameter. In this embodiment, the second linkage gear 1182 is a special-shaped gear. The linkage and differential function of the second gear connecting rod 1164 and the third gear connecting rod 1171 can be achieved through the second linkage gear 1182, thereby simplifying the structure of the rotating shaft mechanism 11.

[0065] The terms used in the above embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the", and "this" are intended to also include expressions such as "one or more", unless the context clearly indicates otherwise.

[0066] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A hinge mechanism (11) for a foldable electronic device (10), characterized in that: The rotating shaft mechanism (11) comprises: A first base (111) and a second base (112) arranged in parallel; A first shell fixing frame (113), a second shell fixing frame (114) and a third shell fixing frame (115), wherein the second shell fixing frame (114) is rotatably connected between the first base (111) and the second base (112), the first shell fixing frame (113) is rotatably connected to a side of the first base (111) facing away from the second shell fixing frame (114), and the third shell fixing frame (115) is rotatably connected to a side of the second base (112) facing away from the second shell fixing frame (114); The first rotating mechanism (116) comprises a first rotating gear (1162), a second rotating gear (1163), a first gear connecting rod (1161) and a second gear connecting rod (1164); the first rotating gear (1162) and the second rotating gear (1163) are meshed and respectively connected to the first base (111), and the second rotating gear (1163) is located on a side of the first rotating gear (1162) away from the first shell fixing frame (113); one end of the first gear connecting rod (1161) is meshed with the first rotating gear (1162), and the other end is connected to the first shell fixing frame (113) in a sliding manner; one end of the second gear connecting rod (1164) is meshed with the second rotating gear (1163), and the other end is connected to the second shell fixing frame (114) in a sliding manner; The second rotating mechanism (117) comprises a third rotating gear (1172), a fourth rotating gear (1173), a third gear connecting rod (1171) and a fourth gear connecting rod (1174); the third rotating gear (1172) and the fourth rotating gear (1173) are meshed and respectively connected to the second base (112) for rotation, and the fourth rotating gear (1173) is located on a side of the third rotating gear (1172) away from the second housing fixing frame (114); the third gear connecting rod (1171) One end of the fourth gear connecting rod (1174) is meshed with the third rotating gear (1172), and the other end is slidably connected to the second shell fixing frame (114); one end of the fourth gear connecting rod (1174) is meshed with the fourth rotating gear (1173), and the other end is slidably connected to the third shell fixing frame (115); the sliding track of the second gear connecting rod (1164) relative to the second shell fixing frame (114) is parallel to and does not overlap with the sliding track of the third gear connecting rod (1171) relative to the second shell fixing frame (114); a linkage gear member (118) disposed on the second housing fixing frame (114), the linkage gear member (118) being located between the second gear connecting rod (1164) and the third gear connecting rod (1171), and being meshed and transmitted with the second gear connecting rod (1164) and the third gear connecting rod (1171) respectively; When the first shell fixing frame (113) rotates in a direction approaching the second shell fixing frame (114), the first rotating gear (1162), the second rotating gear (1163), the first gear connecting rod (1161) and the second gear connecting rod (1164) rotate synchronously, the second gear connecting rod (1164) slides in a direction away from the second base (112) on the second shell fixing frame (114), and drives the third gear connecting rod (1171) to slide in a direction away from the first base (111) through the linkage gear member (118), thereby driving the third gear connecting rod (1171), the third rotating gear (1172), the fourth rotating gear (1173) and the fourth gear connecting rod (1174) to rotate synchronously, so that the third shell fixing frame (115) rotates in a direction approaching the second shell fixing frame (114); When the third shell fixing frame (115) rotates in a direction approaching the second shell fixing frame (114), the third rotating gear (1172), the fourth rotating gear (1173), the third gear connecting rod (1171) and the fourth gear connecting rod (1174) rotate synchronously, and the third gear connecting rod (1171) slides on the second shell fixing frame (114) in a direction away from the first base (111), and drives the second gear connecting rod (1164) to slide in a direction away from the second base (112) through the linkage gear member (118), thereby driving the second gear connecting rod (1164), the second rotating gear (1163), the first rotating gear (1162) and the first gear connecting rod (1161) to rotate synchronously, so that the first shell fixing frame (113) rotates in a direction approaching the second shell fixing frame (114).

2. The rotating shaft mechanism (11) according to claim 1, characterized in that: The linkage gear member (118) comprises at least one first linkage gear (1181), and the first linkage gear (1181) has first teeth.

3. The rotating shaft mechanism (11) according to claim 1, characterized in that: The linkage gear member (118) comprises at least one second linkage gear (1182), wherein the second linkage gear (1182) is provided with a second tooth (11821) on the side facing the second gear connecting rod (1164), and the second linkage gear (1182) is provided with a third tooth (11822) on the side facing the third gear connecting rod (1171), and the second tooth (11821) is different from the third tooth (11822).

4. The rotating shaft mechanism (11) according to claim 3, characterized in that: The second tooth (11821) is different from the third tooth (11822), including at least one of the number of teeth, module, tooth pitch, and pitch circle diameter.

5. The rotating shaft mechanism (11) according to any one of claims 1 to 4, characterized in that: The rotating shaft mechanism (11) further comprises a first differential mechanism (119) and a second differential mechanism (110); The first differential mechanism (119) comprises a first rotating shaft (1191), a first rotating member (1192) and a second rotating member (1193); the first rotating shaft (1191) is disposed on the first base (111), the first rotating member (1192) is rotatably connected between the first housing fixing frame (113) and the first rotating shaft (1191), and the second rotating member (1193) is rotatably connected between the second housing fixing frame (114) and the first rotating shaft (1191); The second differential mechanism (110) comprises a second rotating shaft (1101), a third rotating member (1102) and a fourth rotating member (1103); the second rotating shaft (1101) is arranged on the second base (112), the third rotating member (1102) is rotatably connected between the second housing fixing frame (114) and the second rotating shaft (1101), and the fourth rotating member (1103) is rotatably connected between the third housing fixing frame (115) and the second rotating shaft (1101); The rotation radius of the first differential mechanism (119) is different from the rotation radius of the second differential mechanism (110).

6. The rotating shaft mechanism (11) according to claim 5, characterized in that: The first rotating member (1192) is a first connecting rod, and the second rotating member (1193) is a second connecting rod; Alternatively, the first rotating member (1192) is a first arc arm, and a first arc guide groove is provided on a side of the first rotating shaft (1191) close to the first arc arm; the first arc arm is accommodated in the first arc guide groove and the first rotating member (1192) and the first rotating shaft (1191) are rotationally connected by sliding in the first arc guide groove; the second rotating member (1193) is a second arc arm, and a second arc guide groove is provided on a side of the first rotating shaft (1191) close to the second arc arm; the second arc arm is accommodated in the second arc guide groove and the second rotating member (1193) and the first rotating shaft (1191) are rotationally connected by sliding in the second arc guide groove.

7. The rotating shaft mechanism (11) according to claim 5 or 6, characterized in that: The third rotating member (1102) is a third connecting rod, and the fourth rotating member (1103) is a fourth connecting rod; Alternatively, the third rotating member (1102) is a third arc arm, and a third arc guide groove is provided on a side of the second rotating shaft (1101) close to the third arc arm; the third arc arm is accommodated in the third arc guide groove, and the rotational connection between the third rotating member (1102) and the second rotating shaft (1101) is achieved by sliding in the third arc guide groove; the fourth rotating member (1103) is a fourth arc arm, and a fourth arc guide groove is provided on a side of the second rotating shaft (1101) close to the fourth arc arm; the fourth arc arm is accommodated in the fourth arc guide groove, and the rotational connection between the fourth rotating member (1103) and the second rotating shaft (1101) is achieved by sliding in the fourth arc guide groove.

8. The rotating shaft mechanism (11) according to any one of claims 5 to 7, characterized in that: The second shell fixing frame (114) has a middle plane; when the rotating shaft mechanism (11) is in a flattened state, along the thickness direction of the second shell fixing frame (114), there is a first distance between the rotation axis of the first rotating member (1192) and the middle plane, and there is a second distance between the rotation axis of the second rotating member (1193) and the middle plane, and the first distance is equal to the second distance; there is a third distance between the rotation axis of the third rotating member (1102) and the middle plane, and there is a fourth distance between the rotation axis of the fourth rotating member (1103) and the middle plane, and the third distance is equal to the fourth distance, and the first distance is not equal to the third distance; the rotation radius of the first rotating shaft (1191) around the second shell fixing frame (114) is different from the rotation radius of the second rotating shaft (1101) around the second shell fixing frame (114).

9. The rotating shaft mechanism (11) according to any one of claims 1 to 8, characterized in that: The first gear connecting rod (1161) comprises a first tooth segment (11612) and a first sliding block (11611) which are fixedly connected, the first tooth segment (11612) meshes with the first rotating gear (1162), the first housing fixing frame (113) has a first sliding groove (1131) on one side facing the first gear connecting rod (1161), the first sliding block (11611) is accommodated in the first sliding groove (1131) and realizes a sliding connection between the first gear connecting rod (1161) and the first housing fixing frame (113) by sliding in the first sliding groove (1131); The second gear connecting rod (1164) comprises a second tooth segment (11641) and a second sliding block (11642) which are fixedly connected, the second tooth segment (11641) is meshed with the second rotating gear (1163), the second housing fixing frame (114) has a second sliding groove (1141) on the side facing the second gear connecting rod (1164), the second sliding block (11642) is accommodated in the second sliding groove (1141) and realizes the sliding connection between the second gear connecting rod (1164) and the second housing fixing frame (114) by sliding in the second sliding groove (1141); The third gear connecting rod (1171) includes a third tooth segment (11712) and a third slider (11711) which are fixedly connected. The third tooth segment (11712) meshes with the third rotating gear (1172). The second housing fixing frame (114) has a third sliding groove (1142) on one side facing the third gear connecting rod (1171). The third slider (11711) is accommodated in the third sliding groove (1142) and realizes the sliding connection between the third gear connecting rod (1171) and the second housing fixing frame (114) by sliding in the third sliding groove (1142). The fourth gear connecting rod (1174) includes a fourth tooth segment (11741) and a fourth slider (11742) which are fixedly connected. The fourth tooth segment (11741) meshes with the fourth rotating gear (1173). The third housing fixing frame (115) has a third sliding groove (1142) on one side facing the fourth gear connecting rod (1174). The fourth sliding groove (1151) is provided on the side, and the fourth sliding block (11742) is accommodated in the fourth sliding groove (1151) and realizes the sliding connection between the fourth gear connecting rod (1174) and the third shell fixing frame (115) by sliding in the fourth sliding groove (1151).

10. The rotating shaft mechanism (11) according to any one of claims 1 to 9, characterized in that: A first rack (11643) is provided on a side of the second gear connecting rod (1164) facing the linkage gear member (118), and the first rack (11643) is meshed with the linkage gear member (118); A second rack (11713) is provided on the side of the third gear connecting rod (1171) facing the linkage gear member (118), and the second rack (11713) is meshed with the linkage gear member (118).

11. An electronic device (10), characterized in that: The invention comprises a flexible display screen (12), a first shell (13), a second shell (14), a third shell (15) and a hinge mechanism (11) as claimed in any one of claims 1 to 10, wherein the first shell (13) is fixedly connected to the first shell fixing frame (113), the second shell (14) is fixedly connected to the second shell fixing frame (114), the third shell (15) is fixedly connected to the third shell fixing frame (115), and the flexible display screen (12) continuously covers the first shell (13), the second shell (14), the third shell (15) and the hinge mechanism (11), and is fixedly connected to the first shell (13), the second shell (14) and the third shell (15), respectively.

12. The electronic device (10) according to claim 11, characterized in that The rotation axis of the first rotating mechanism (116) rotating around the first base (111) is located on a side of the first base (111) facing the flexible display screen (12), and the rotation axis of the second rotating mechanism (117) rotating around the second base (112) is located on a side of the second base (112) facing the flexible display screen (12); or The rotation axis of the first rotating mechanism (116) rotating around the first base (111) is located on a side of the first base (111) away from the flexible display screen (12), and the rotation axis of the second rotating mechanism (117) rotating around the second base (112) is located on a side of the second base (112) away from the flexible display screen (12); or The rotation axis of the first rotating mechanism (116) rotating around the first base (111) is located on a side of the first base (111) facing the flexible display screen (12), and the rotation axis of the second rotating mechanism (117) rotating around the second base (112) is located on a side of the second base (112) facing away from the flexible display screen (12).

Images