Electric folding hinge structure and electronic equipment

Abstract

The embodiment of the invention provides an electric folding hinge structure and electronic equipment, the electric folding hinge structure comprises a shell, a driving assembly, a gear transmission assembly and a hinge assembly, and the gear transmission assembly comprises a first gear set, a second gear set and a third gear set; the device further comprises a first cam mechanism, and the first cam mechanism comprises a first cam arranged at the output end of the first gear set and a second cam arranged at the input end of the second gear set. Moreover, when the first cam mechanism bears a first torque smaller than or equal to a preset first torque, the first cam is meshed with the second cam, so that the driving force of the driving assembly is transmitted to the hinge assembly through the first gear set, the second gear set and the third gear set in sequence, and the rotating state of the hinge assembly is synchronously controlled; and when the first cam mechanism is subjected to a torque greater than the first torque, the second cam rotates relative to the first cam to separate the first cam from the second cam so as to interrupt a power transmission path between the first gear set and the second and third gear sets.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of electronic devices, and particularly relate to an electric folding hinge structure and an electronic device. Background Art

[0002] With the advent of the mobile internet era, the number of smart mobile devices continues to rise. Among these mobile devices, foldable electronic devices, such as foldable phones, foldable tablets, and laptops, are gaining popularity among consumers due to their portability and large display screens. Foldable electronic devices achieve their foldability through hinges.

[0003] However, the hinges used in foldable phones on the market are manually opened and closed by prying the middle frame of the phone. When manual opening and closing is required, it is inconvenient and not smart enough, and it is difficult to operate with one hand, resulting in a poor experience of the electronic device.

[0004] Therefore, how to solve the above problems becomes a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide an electric folding hinge structure and an electronic device.

[0006] A first aspect of the embodiments of the present disclosure provides an electric folding hinge structure, comprising:

[0007] A housing, a driving assembly housed in the housing, a gear transmission assembly drivingly connected to the driving assembly, and a hinge assembly rotatably disposed on the housing and drivingly connected to the gear transmission assembly, wherein the gear transmission assembly includes a first gear set drivingly connected to the driving assembly, a second gear set drivingly connected to the first gear set, and a third gear set driving coaxially with the second gear set; wherein,

[0008] The hinge assembly further includes a first cam mechanism, the first cam mechanism including a first cam provided at the output end of the first gear set and a second cam provided at the input end of the second gear set; and when the first cam mechanism is subjected to a first torque less than or equal to a predetermined first torque, the first cam engages with the second cam, so that the driving force of the driving assembly is sequentially transmitted to the hinge assembly through the first gear set, the second gear set, and the third gear set, and the rotation state of the hinge assembly is synchronously controlled;

[0009] When the first cam mechanism is subjected to a torque greater than the first torque, the second cam rotates relative to the first cam to separate the two, thereby interrupting the power transmission path between the first gear set and the second gear set and the third gear set.

[0010] Optionally, the first gear set includes a first transmission gear coaxially connected to the driving assembly and a second transmission gear meshing with the first transmission gear, and the first cam is provided on the shaft end of the second transmission gear away from the driving assembly.

[0011] Optionally, the second gear set includes an intermediate shaft movably inserted into the second transmission gear, a third transmission gear sleeved on the intermediate shaft, and a fourth transmission gear meshingly connected to the third transmission gear;

[0012] Wherein, the second cam is provided on the shaft end of the third transmission gear close to the second transmission gear.

[0013] Optionally, the third gear set includes an output shaft arranged parallel to the intermediate shaft, a fifth transmission gear sleeved on the output shaft, and a sixth transmission gear sleeved on an end of the intermediate shaft away from the third transmission gear and meshingly connected to the fifth transmission gear;

[0014] Wherein, the fourth transmission gear is sleeved on an end of the output shaft away from the fifth transmission gear.

[0015] Optionally, it also includes: a first elastic member, which is sleeved on the intermediate shaft and elastically compressed between the third transmission gear and the sixth transmission gear, so that the second cam can maintain an engagement state with the first cam when the first cam mechanism is subjected to a torque less than or equal to the first torque.

[0016] Optionally, the first cam includes a plurality of first convex portions spaced apart from each other axially around the second transmission gear, and a first concave portion surrounded by two adjacent first convex portions;

[0017] The second cam includes a plurality of second convex portions spaced apart axially around the third transmission gear and adapted to the first concave portion, and a second concave portion surrounded by two adjacent second convex portions and adapted to the first convex portion.

[0018] Optionally, the hinge structure also includes a first baffle and a second baffle movably mounted on the intermediate shaft and the output shaft, the first elastic member is elastically compressed between the first baffle and the sixth transmission gear, and the first baffle is clamped between the first elastic member and the second gear group, and the second baffle is clamped between the first elastic member and the third gear group.

[0019] Optionally, the hinge structure further includes: a second cam mechanism, the second cam mechanism including a third cam fixedly connected to the fifth transmission gear, and a fourth cam provided on a side of the second blocking piece close to the third cam;

[0020] The third cam and the fourth cam are configured to engage with each other when the hinge assembly rotates to 0° or 180° relative to the housing, and to squeeze each other when the hinge assembly rotates to a position between 0° and 180° relative to the housing.

[0021] Optionally, the third cam includes a plurality of third convex portions spaced apart from each other axially around the fifth transmission gear, and a third concave portion surrounded by two adjacent third convex portions;

[0022] The fourth cam includes a plurality of fourth convex portions corresponding to and matched with the third concave portions, and a fourth concave portion surrounded by two adjacent fourth convex portions and matched with the third convex portion.

[0023] Optionally, the system further comprises: a second elastic member, the second elastic member being sleeved on the output shaft and elastically compressed between the first blocking piece and the second blocking piece;

[0024] When the first cam mechanism is subjected to a torque greater than the first torque, the second cam rotates relative to the first cam to separate the first convex portion from the second concave portion, and pushes the third transmission gear to drive the first baffle to move synchronously along the axial direction to compress the second elastic member.

[0025] Optionally, the hinge assembly includes a connecting member that is transmission-connected to the second gear set and / or the third gear set, and a mounting member that is arranged at one end of the connecting member away from the second gear set and / or the third gear set and is adapted to be mounted with the connecting member, wherein the mounting member is fixed to the folding screen body, and the hinge assembly is configured to synchronously drive the folding screen body to rotate around the shell through the connecting member according to the driving force provided by the second gear set and / or the third gear set.

[0026] Optionally, there are two of the drive assembly, the gear transmission assembly and the hinge assembly, and the two drive assemblies are arranged side by side on the shell along the folding direction of the two sides of the shell and are correspondingly connected to the two gear transmission assemblies. The two hinge assemblies are respectively arranged on the two sides of the relative folding of the shell and are respectively connected to the two gear transmission assemblies, wherein the two first gear groups corresponding to the two gear transmission assemblies are meshed with each other, and the corresponding two third gear groups are meshed with each other.

[0027] According to a second aspect of the embodiments of the present disclosure, there is provided an electronic device, comprising an upper folding screen body, a lower folding screen body, a control switch, a screen, and the electric folding hinge structure as described above; the control switch controls the operation of the driving assembly, the upper folding screen body and the lower folding screen body are relatively located on both sides of the shell and are transmission-connected to the hinge assembly, and the screen is respectively covered on the upper folding screen body, the lower folding screen body, and the shell opening of the shell.

[0028] The beneficial effects of the embodiments of the present disclosure include:

[0029] During electric opening and closing, power is output through the drive assembly. When the torque output by the drive assembly is transmitted to the first cam mechanism, the first cam mechanism remains in an engaged state when the torque received is less than the first torque, and further transmits the torque output by the drive assembly to the output end of the gear transmission assembly.

[0030] During manual opening and closing, the torque generated by the user's manual rotation is transmitted through the hinge assembly to the gear transmission assembly, which then transmits it to the first cam mechanism. Due to the self-locking nature of the drive assembly upon power failure, the first cam mechanism cannot overcome the drive assembly's self-locking force. Furthermore, when the second cam is subjected to a user-provided torque greater than the first torque, it compresses the first cam, expands, and rotates relative to it, severing power transmission between the gear transmission assembly and the drive assembly, achieving the effect of an automatic clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of an electric folding hinge structure according to an embodiment of the present disclosure;

[0032] Figure 2 This is a partially exploded structural diagram of an electric folding hinge structure according to an embodiment of the present disclosure;

[0033] Figure 3 This is a partially exploded structural diagram of an electric folding hinge structure according to another embodiment of the present disclosure;

[0034] Figure 4 This is a schematic diagram of the overall exploded structure of an electric folding hinge structure according to an embodiment of the present disclosure;

[0035] Figure 5 This is a schematic structural diagram of a second transmission gear according to an embodiment of the present disclosure;

[0036] Figure 6 This is a schematic structural diagram of the combination of an intermediate shaft and a third transmission gear according to an embodiment of the present disclosure;

[0037] Figure 7 This is a schematic structural diagram of the combination of the fourth transmission gear, the fifth transmission gear and the connecting member according to an embodiment of the present disclosure;

[0038] Figure 8 This is a schematic structural diagram of a second baffle according to an embodiment of the present disclosure;

[0039] Figure 9 This is a structural schematic diagram of a connecting member and a mounting member in an exploded state according to an embodiment of the present disclosure;

[0040] Figure 10 The figure is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.

[0041] In the figure, 100, electric folding hinge structure; 200, electronic equipment; 10, housing; 20, driving assembly; 30, gear transmission assembly; 40, hinge assembly; 50, first elastic member; 60, first baffle; 70, second baffle; 80, second elastic member; 90, ; 21, synchronous motor; 22, speed reduction mechanism; 31, first gear set; 32, second gear set; 33, third gear set; 34, first cam mechanism; 35, second cam mechanism; 311, first transmission gear; 312, second transmission gear; 321, intermediate shaft; 322, third transmission gear; 323, fourth transmission gear; 331, output shaft; 332, fifth transmission gear; 333, first transmission gear; Six transmission gears; 341, first cam; 342, second cam; 351, third cam; 352, fourth cam; 3411, first convex portion; 3412, first concave portion; 3421, second convex portion; 3422, second concave portion; 3511, third convex portion; 3512, third concave portion; 3521, fourth convex portion; 3522, fourth concave portion; 41, connecting member; 42, mounting member; 43, hinge member; 431, fixing block; 432, first swinging assembly; 433, second swinging assembly; 4321, first pendulum member; 4322, second pendulum member; 4331, third pendulum member; 4332, fourth pendulum member; 110, first support plate; 120, second support plate. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0043] The following is a further detailed description of the embodiments of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions and drawings of the following examples are used to illustrate the principles of the present application, but are not used to limit the scope of the present application, that is, the present application is not limited to the described embodiments. In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is more than two; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not perpendicular in the strict sense, but is within the allowable error range. "Parallel" is not parallel in the strict sense, but is within the allowable error range.

[0044] It should also be noted that, in the description of this application, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0045] like Figure 1-4 As shown, an electric folding hinge structure 100 includes a housing 10, a driving assembly 20 housed in the housing 10, a gear transmission assembly 30 drivingly connected to the driving assembly 20, and a hinge assembly 40 rotatably disposed on the housing 10 and drivingly connected to the gear transmission assembly 30. The gear transmission assembly 30 includes a first gear set 31 drivingly connected to the driving assembly 20, a second gear set 32 ​​drivingly connected to the first gear set 31, and a third gear set 33 driving coaxially with the second gear set 32.

[0046] It also includes a first cam mechanism 34, which includes a first cam 341 arranged at the output end of the first gear group 31, and a second cam 342 arranged at the input end of the second gear group 32, and when the first cam mechanism 34 is subjected to a first torque less than or equal to a predetermined first torque, the first cam 341 engages with the second cam 342, so that the driving force of the driving component 20 is transmitted to the hinge component 40 in sequence through the first gear group 31, the second gear group 32 and the third gear group 33, and synchronously controls the rotation state of the hinge component 40.

[0047] And when the first cam mechanism 34 is subjected to a torque greater than the first torque, the second cam 342 rotates relative to the first cam 341 to separate the two, thereby interrupting the power transmission path between the first gear set 31 and the second gear set 32 ​​and the third gear set 33, so that the driving component 20 cannot control the rotation state of the hinge component 40.

[0048] Specifically, the first cam 341 is coaxially connected to the first gear set 31 and receives power input from the drive assembly 20 through the first gear set 31. The second cam 342 is meshed with the first cam 341 and is coaxially transmitted with the second gear set 32. The second gear set 32 ​​receives power from the second cam 342 and transmits it to the output end of the gear transmission assembly 30. The meshing conditions of the first cam 341 and the second cam 342 include: when the torque applied to the second cam 342 is ≤ the first torque, the second cam 342 maintains a meshing state with the first cam 341; when the torque applied to the second cam 342 is > the first torque, the second cam 342 rotates and separates relative to the first cam 341.

[0049] Furthermore, when opening and closing electrically, power is output through the drive component 20. When the torque output by the drive component 20 is transmitted to the first cam mechanism 34, the first cam mechanism 34 remains in an engaged state when the torque received is less than or equal to the first torque, and further transmits the torque output by the drive component 20 to the output end of the gear transmission component 30.

[0050] During manual opening and closing, the torque generated by the user's manual rotation is transmitted through the hinge assembly 40 to the first cam mechanism 34 of the gear transmission assembly 30. Because the drive assembly 20 self-locks upon power failure, the first cam 341 cannot overcome the self-locking force of the drive assembly 20 and rotate. Furthermore, when the second cam 342 is subjected to a torque greater than the first torque provided by the user, it squeezes the first cam 341, then expands and rotates relative to it, severing power transmission between the second and third gear sets 32 and 33 and the drive assembly 20, achieving the effect of an automatic clutch.

[0051] In the present disclosure, the design of the above solution is adopted, and automatic clutch switching between electric and manual opening and closing can be achieved without additional operation.

[0052] Specific reference Figure 3-4 In some embodiments, the drive assembly 20 includes a synchronous motor 21 disposed in the housing 10, and a reduction mechanism 22 transmission-connected to the synchronous motor 21, wherein the output end of the reduction mechanism 22 is transmission-connected to the first gear set 31.

[0053] In some embodiments, the first gear set 31 includes a first transmission gear 311 coaxially connected to the driving assembly 20 and a second transmission gear 312 meshingly connected to the first transmission gear 311 , and the first cam 341 is provided at the axial end of the second transmission gear 312 away from the driving assembly 20 .

[0054] In some other embodiments, the first cam 341 and the second transmission gear 312 are integrally formed.

[0055] In some embodiments, the hinge structure 100 also includes a supporting shell 90 disposed in the shell 10, wherein the supporting shell 90 has a receiving space for accommodating the first gear set 31, wherein the first gear set 31 is accommodated in the receiving space of the supporting shell 90 and is respectively connected to the drive assembly 20 and the second gear set 32.

[0056] In some embodiments, the second gear set 32 ​​includes an intermediate shaft 321 movably inserted into the second transmission gear 312 , a third transmission gear 322 sleeved on the intermediate shaft 321 , and a fourth transmission gear 323 meshingly connected to the third transmission gear 322 .

[0057] The second cam 342 is provided on the shaft end of the third transmission gear 322 close to the second transmission gear 312 .

[0058] Specifically, the second transmission gear 312 is provided with an axial hole, and the second transmission gear 312 is movably sleeved on the intermediate shaft 321 through the axial hole. When the first cam mechanism 34 is subjected to a torque greater than the first torque, the second cam 342 rotates relative to the first cam 341 to separate the two, and the intermediate shaft 321, the second cam 342 and the third transmission gear 322 all slide axially in a direction away from the second transmission gear 312.

[0059] Furthermore, the second transmission gear 312 is disposed on a side of the first transmission gear 311 away from the side wall of the housing 10 , and the fourth transmission gear 323 is disposed on a side of the third transmission gear 322 close to the side wall of the housing 10 .

[0060] In some other embodiments, the intermediate shaft 321 , the second cam 342 and the third transmission gear 322 are integrally formed.

[0061] In some embodiments, the third gear set 33 includes an output shaft 331 arranged parallel to the intermediate shaft 321, a fifth transmission gear 332 sleeved on the output shaft 331, and a sixth transmission gear 333 sleeved on an end of the intermediate shaft 321 away from the third transmission gear 322 and meshingly connected to the fifth transmission gear 332.

[0062] The fourth transmission gear 323 is sleeved on an end of the output shaft 331 away from the fifth transmission gear 332 .

[0063] In some embodiments, the hinge assembly 40 is in transmission connection with the fourth transmission gear 323 .

[0064] In some embodiments, the hinge assembly 40 is in transmission connection with the fifth transmission gear 332 .

[0065] In some further embodiments, the hinge assembly 40 is respectively in transmission connection with the fourth transmission gear 323 and the fifth transmission gear 332 .

[0066] In some embodiments, the hinge structure 100 further includes a first elastic member 50, which is sleeved on the intermediate shaft 321 and elastically compressed between the third transmission gear 322 and the sixth transmission gear 333, so that when the first cam mechanism 34 is subjected to a torque less than or equal to the first torque, the second cam 342 can maintain an engagement state with the first cam 341.

[0067] In some embodiments, the first elastic member 50 is a spring sleeved on the intermediate shaft 321 , and opposite ends of the spring respectively abut against the third transmission gear 322 and the sixth transmission gear 333 , which is used to keep the first cam 341 and the second cam 342 in an engaged state.

[0068] Specific reference Figure 5-6 In some embodiments, the first cam 341 includes a plurality of first protrusions 3411 axially spaced apart around the second transmission gear 312 , and a first recess 3412 formed by two adjacent first protrusions 3411 .

[0069] The second cam 342 includes a plurality of second protrusions 3421 axially spaced apart around the third transmission gear 322 and adapted to the first recess 3412 , and a second recess 3422 surrounded by two adjacent second protrusions 3421 and adapted to the first protrusion 3411 .

[0070] Specifically, the first cam 341 includes a plurality of first protrusions 3411 equidistantly distributed along the axial direction of the second transmission gear 312 . The meshing surface of each first protrusion 3411 is provided with a guiding slope 34111 , and a first recess 3412 is formed between two adjacent first protrusions 3411 .

[0071] The second cam 342 includes a plurality of second protrusions 3421 equidistantly distributed along the axial direction of the third transmission gear 322 . The meshing surface of each second protrusion 3421 is provided with a guided inclined surface 34211 matching the guiding inclined surface 34111 , and a second recess 3422 is formed between two adjacent second protrusions 3421 .

[0072] During electric opening and closing, under the action of a torque less than the first torque provided by the elastic compression force of the first elastic member 50, the guided inclined surface 34211 of the second protrusion 3421 fits with the guiding inclined surface 34111 of the first protrusion 3411, and the second protrusion 3421 is embedded in the first recess 3412 to achieve transmission engagement.

[0073] When manually opening and closing, when the user's external force provides a torque greater than the first torque, the first protrusion 3411 cannot overcome the self-locking force of the drive assembly 20 to rotate, and the second protrusion 3421 disengages from the first recess 3412 and slides along the guide slope 34111 of the first recess 3412 to the top surface of the first protrusion 3411, and the third transmission gear 322 and the intermediate shaft 321 are displaced axially to achieve transmission interruption.

[0074] Continue to refer Figure 3-4 In some embodiments, the hinge structure 100 further includes a first baffle 60 and a second baffle 70 that are synchronously movably sleeved on the intermediate shaft 321 and the output shaft 331, and the first elastic member 50 is elastically compressed between the first baffle 60 and the second baffle 70, and the first baffle 60 is clamped between the first elastic member 50 and the second gear set 32, and the second baffle 70 is clamped between the first elastic member 50 and the third gear set 33.

[0075] Specifically, the first blocking piece 60 and the second blocking piece 70 are respectively provided with through-holes adapted to the radial dimensions of the intermediate shaft 321 and the output shaft 331. The first blocking piece 60 and the second blocking piece 70 are respectively movably mounted on the intermediate shaft 321 and the output shaft 331 through the through-holes. The first elastic member 50 is elastically compressed between the first blocking piece 60 and the sixth transmission gear 333, causing the first blocking piece 60 to abut against the shaft end of the third transmission gear 322 away from the second transmission gear 312, and the second blocking piece 70 to abut against the shaft end of the sixth transmission gear 333 closer to the third transmission gear 322. Furthermore, the first elastic member 50 applies a torque less than the first torque to the second cam 342 via the first blocking piece 60, thereby maintaining the meshing state between the first cam 341 and the second cam 342.

[0076] In some embodiments, the hinge structure further includes a second cam mechanism 35, which includes a third cam 351 fixedly connected to the fifth transmission gear 332, and a fourth cam 352 disposed on a side of the second blocking piece 70 proximate to the third cam 351. The third cam 351 and the fourth cam 352 are configured to engage with each other when the hinge assembly 40 rotates to a position of 0° or 180° relative to the housing 10, and to press against each other when the hinge assembly 40 rotates to a position between 0° and 180° relative to the housing 10.

[0077] When the first cam 341 is separated from the second cam 342 , the first blocking piece 60 pushes the fourth cam 352 on the second blocking piece 70 to move axially toward the third cam 351 .

[0078] In the present disclosure, since the second cam 342 is stretched open by the first cam 341, the third transmission gear 322 produces axial displacement and drives the first baffle 60 to push the second baffle 70 to move, so that the squeezing force between the third cam 351 and the fourth cam 352 is increased and the friction force is increased, thereby increasing the damping of the output shaft 331 and improving the experience during opening and closing.

[0079] refer to Figure 7-8 In some embodiments, the third cam 351 includes a plurality of third protrusions 3511 axially spaced apart around the fifth transmission gear 332 , and a third recess 3512 formed by two adjacent third protrusions 3511 .

[0080] The fourth cam 352 includes a plurality of fourth protrusions 3521 corresponding to and matching the third recesses 3512 , and a fourth recess 3522 surrounded by two adjacent fourth protrusions 3521 and matching the third protrusion 3511 .

[0081] Specifically, the third cam 351 includes a plurality of third protrusions 3511 equidistantly distributed along the axial direction of the fifth transmission gear 332 . The meshing surface of each third protrusion 3511 is provided with a guiding inclined surface 35111 , and a third recess 3512 is formed between two adjacent third protrusions 3511 .

[0082] The fourth cam 352 includes a plurality of fourth protrusions 3521 equidistantly distributed axially around the fifth transmission gear 332 . The meshing surface of each fourth protrusion 3521 is provided with a guided inclined surface 35211 matching the guiding inclined surface, and a fourth recess 3522 is formed between two adjacent fourth protrusions 3521 .

[0083] Specific reference Figure 3In some embodiments, the hinge structure 100 further includes a second elastic member 80 , which is sleeved on the output shaft 331 and elastically compressed between the first blocking piece 60 and the second blocking piece 70 .

[0084] When the first cam mechanism 34 is subjected to a torque greater than the first torque, the second cam 342 rotates relative to the first cam 341 to separate the first protrusion 3411 from the second recess 3422, and pushes the third transmission gear 322 to drive the first baffle 60 to move synchronously along the axial direction to compress the second elastic member 80.

[0085] Furthermore, based on the elastic compression force of the second elastic member 80 , the second blocking piece 70 causes the fourth protrusion 3521 to form a sliding extrusion contact with the guiding inclined surface 35111 of the third protrusion 3511 through the guided inclined surface 35211, thereby increasing the friction between the two and improving the rotation damping.

[0086] In the present disclosure, when opening and closing electrically, torque is output through the driving component 20. When the torque is transmitted to the first cam mechanism 34, the second cam 342 always remains in engagement with the first cam 341 under the action of the first elastic member 50 which is less than the first torque, and further transmits the torque to the output end of the gear transmission component 30. At this time, since the second elastic member 80 is not compressed, the damping of the output shaft 331 is small, so the output shaft 331 can follow the rotation, thereby achieving the purpose of low-damping electric opening and closing.

[0087] During manual opening and closing, torque is transmitted from the output shaft 331 to the first cam mechanism 34. Due to the self-locking feature of the drive assembly 20 when powered off, and the reduction mechanism 22 further amplifying the self-locking force, the first cam 341 is unable to rotate against the self-locking force of the synchronous motor 21. The second cam 342, under the action of a torque greater than the first torque, squeezes the first cam 341 and then stretches it apart, causing relative rotation, cutting off power transmission to the synchronous motor 21 and achieving a clutch effect. Simultaneously, the axial displacement of the second cam 342 due to its expansion increases the squeezing force between the two, thereby increasing the damping of the output shaft 331's rotation and improving the manual opening and closing experience.

[0088] In some embodiments, the second elastic member 80 is a spring sleeved on the output shaft 331, and is configured to push the fourth cam 352 to move axially toward the third cam 351 when pressed by the first stopper 60. Specifically, when the foldable phone is flipped relative to the housing 10 to an angle of approximately 180° or approximately 0° via the hinge assembly 40, the fourth cam 352 remains engaged with the third cam 351 due to the elastic force, limiting the position of the phone in the flat or folded closed state. Furthermore, during the flipping process of the hinge assembly 40 relative to the housing 10 between 0° and 180°, the fourth cam 352 remains in pressurized contact with the third cam 351 due to the elastic force, thereby increasing rotational damping.

[0089] In some embodiments, the hinge assembly 40 includes a connecting member 41 that is transmission-connected to the second gear set 32 ​​and / or the third gear set 33, and a mounting member 42 that is arranged at one end of the connecting member 41 away from the second gear set 32 ​​and / or the third gear set 33 and is adapted to be mounted with the connecting member 41, wherein the mounting member 42 is fixed to the folding screen body, and the hinge assembly 40 is configured to synchronously drive the folding screen body to rotate around the shell 10 through the connecting member 41 according to the driving force provided by the second gear set 32 ​​and / or the third gear set 33.

[0090] In some embodiments, there are two drive assemblies 20, two gear transmission assemblies 30, and two hinge assemblies 40. The two drive assemblies 20 are arranged side by side on the housing 10 along the folding direction of the two sides of the housing 10 and are in transmission connection with the two gear transmission assemblies 30. The two hinge assemblies 40 are respectively arranged on the two sides of the relatively folded housing 10 and are respectively connected with the two gear transmission assemblies 30. The two first gear sets 31 corresponding to the two gear transmission assemblies 30 are meshed with each other, and the two third gear sets 33 corresponding to the two gear transmission assemblies 30 are meshed with each other. With the above arrangement, the two relative hinge assemblies 40 can be opened and closed synchronously.

[0091] In some embodiments, a plug-in portion 411 is provided at one end of the connecting member 41 away from the fourth transmission gear 323 and / or the fifth transmission gear 332, and the mounting member 42 is provided with a plug-in slot 421 that is adapted to the shape of the plug-in portion 411, wherein the connecting member 41 realizes the transmission connection between the fourth transmission gear 323 and / or the fifth transmission gear 332 and the folding screen body through the plug-in cooperation between the plug-in portion 411 and the plug-in slot 421.

[0092] Furthermore, a protrusion 4211 is protruded from the inner wall of the plug-in slot 421, and a groove 4111 adapted to the protrusion 4211 is opened at a position of the plug-in portion 411 corresponding to the inner wall of the plug-in slot 421, wherein the plug-in portion 411 is fixed in the plug-in slot 421 by the adapted installation of the protrusion 4211 and the groove 4111.

[0093] Specific reference Figure 9 In a specific example, the connecting member 41 is integrally formed with the fourth transmission gear 323 and the fifth transmission gear 332 .

[0094] Continue to refer Figure 2-4 In some embodiments, the hinge assembly 40 also includes a hinge component 43 installed at opposite ends of the shell 10, and the hinge component 43 includes a fixed block 431 arranged in the shell 10, and a first swinging component 432 and a second swinging component 433 arranged relatively to each other and respectively rotatably connected to the fixed block 431, the end of the first swinging component 432 away from the fixed block 431 is connected to the upper folding screen body, and the end of the second swinging component 433 away from the fixed block 431 is connected to the lower folding screen body.

[0095] Specifically, the first swing assembly 432 includes a first swing member 4321 connected to the upper folding screen body, and a second swing member 4322 rotatably connected to the fixed block 431 and connected to the first swing member 4321. The second swing assembly 433 includes a third swing member 4331 connected to the lower folding screen body, and a fourth swing member 4332 rotatably connected to the fixed block 431 and connected to the third swing member 4331.

[0096] refer to Figure 10 According to a second aspect of an embodiment of the present disclosure, an electronic device 200 is provided, comprising an upper folding screen body 210, a lower folding screen body 220, a control switch 230, a screen 240, and the electric folding hinge structure 100 as described above; the control switch 240 controls the operation of the driving assembly 20, the upper folding screen body 210 and the lower folding screen body 220 are relatively located on both sides of the shell 10 and are transmission-connected to the hinge assembly 40, and the screen 240 is respectively covered on the upper folding screen body 210, the lower folding screen body 220, and the shell opening of the shell 10.

[0097] In some embodiments, the electronic device 200 further includes a first support sheet 110 and a second support sheet 120 arranged side by side, wherein the first support sheet 110 and the second support sheet 120 are respectively arranged on one side of the screen 240 close to the shell 10 and jointly cover the shell opening of the shell 10.

[0098] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. An electric folding hinge structure, characterized in that: The invention comprises a housing, a driving assembly housed in the housing, a gear transmission assembly connected to the driving assembly, and a hinge assembly rotatably arranged on the housing and connected to the gear transmission assembly, wherein the gear transmission assembly comprises a first gear set connected to the driving assembly, a second gear set connected to the first gear set, and a third gear set coaxially connected to the second gear set; wherein, The hinge assembly further includes a first cam mechanism, the first cam mechanism including a first cam provided at the output end of the first gear set and a second cam provided at the input end of the second gear set; and when the first cam mechanism is subjected to a first torque less than or equal to a predetermined first torque, the first cam engages with the second cam, so that the driving force of the driving assembly is sequentially transmitted to the hinge assembly through the first gear set, the second gear set, and the third gear set, and the rotation state of the hinge assembly is synchronously controlled; When the first cam mechanism is subjected to a torque greater than the first torque, the second cam rotates relative to the first cam to separate the two, thereby interrupting the power transmission path between the first gear set and the second gear set and the third gear set.

2. The electric folding hinge structure according to claim 1, characterized in that: The first gear set includes a first transmission gear coaxially connected to the driving assembly and a second transmission gear meshing with the first transmission gear. The first cam is provided on the shaft end of the second transmission gear away from the driving assembly.

3. The electric folding hinge structure according to claim 2, characterized in that: The second gear set includes an intermediate shaft movably inserted into the second transmission gear, a third transmission gear sleeved on the intermediate shaft, and a fourth transmission gear meshingly connected to the third transmission gear; Wherein, the second cam is provided on the shaft end of the third transmission gear close to the second transmission gear.

4. The electric folding hinge structure according to claim 3, characterized in that: The third gear set includes an output shaft arranged parallel to the intermediate shaft, a fifth transmission gear sleeved on the output shaft, and a sixth transmission gear sleeved on an end of the intermediate shaft away from the third transmission gear and meshingly connected to the fifth transmission gear; Wherein, the fourth transmission gear is sleeved on an end of the output shaft away from the fifth transmission gear.

5. The electric folding hinge structure according to claim 4, characterized in that: Also includes: A first elastic member is sleeved on the intermediate shaft and elastically compressed between the third transmission gear and the sixth transmission gear, so that the second cam can maintain an engagement state with the first cam when the first cam mechanism is subjected to a torque less than or equal to the first torque.

6. The electric folding hinge structure according to claim 3, characterized in that: The first cam includes a plurality of first convex portions spaced apart from each other axially around the second transmission gear, and a first concave portion surrounded by two adjacent first convex portions; The second cam includes a plurality of second convex portions spaced apart axially around the third transmission gear and adapted to the first concave portion, and a second concave portion surrounded by two adjacent second convex portions and adapted to the first convex portion.

7. The electric folding hinge structure according to claim 5, characterized in that: The hinge structure also includes a first baffle and a second baffle movably mounted on the intermediate shaft and the output shaft, the first elastic member is elastically compressed between the first baffle and the sixth transmission gear, and the first baffle is clamped between the first elastic member and the second gear set, and the second baffle is clamped between the first elastic member and the third gear set.

8. The electric folding hinge structure according to claim 7, characterized in that: The hinge structure further includes: a second cam mechanism, the second cam mechanism including a third cam fixedly connected to the fifth transmission gear, and a fourth cam provided on a side of the second blocking piece close to the third cam; The third cam and the fourth cam are configured to engage with each other when the hinge assembly rotates to 0° or 180° relative to the housing, and to squeeze each other when the hinge assembly rotates to a position between 0° and 180° relative to the housing.

9. The electric folding hinge structure according to claim 8, characterized in that: The third cam includes a plurality of third convex portions spaced apart from each other axially around the fifth transmission gear, and a third concave portion surrounded by two adjacent third convex portions; The fourth cam includes a plurality of fourth convex portions corresponding to and matched with the third concave portions, and a fourth concave portion surrounded by two adjacent fourth convex portions and matched with the third convex portion.

10. The electric folding hinge structure according to claim 8, characterized in that: Also includes: a second elastic member, the second elastic member being sleeved on the output shaft and elastically compressed between the first blocking piece and the second blocking piece; When the first cam mechanism is subjected to a torque greater than the first torque, the second cam rotates relative to the first cam to separate the first convex portion from the second concave portion, and pushes the third transmission gear to drive the first blocking piece to move synchronously along the axial direction to compress the second elastic member.

11. The electric folding hinge structure according to claim 1, characterized in that: The hinge assembly includes a connecting member that is transmission-connected to the second gear set and / or the third gear set, and a mounting member that is arranged at one end of the connecting member away from the second gear set and / or the third gear set and is adapted to be mounted on the connecting member, wherein the mounting member is fixed to the folding screen body, and the hinge assembly is configured to synchronously drive the folding screen body to rotate around the shell through the connecting member according to the driving force provided by the second gear set and / or the third gear set.

12. The electric folding hinge structure according to claim 1, characterized in that: There are two drive assemblies, two gear transmission assemblies and two hinge assemblies. The two drive assemblies are arranged side by side on the shell along the folding direction of the two sides of the shell and are correspondingly connected to the two gear transmission assemblies. The two hinge assemblies are respectively arranged on the two sides of the relatively folded shell and are respectively connected to the two gear transmission assemblies. The two first gear groups corresponding to the two gear transmission assemblies are meshed with each other, and the two third gear groups corresponding to the two gear transmission assemblies are meshed with each other.

13. An electronic device, characterized in that: It includes an upper folding screen body, a lower folding screen body, a control switch, a screen and an electric folding hinge structure as described in any one of claims 1 to 12; the control switch controls the operation of the driving component, the upper folding screen body and the lower folding screen body are relatively located on both sides of the shell and are transmission connected to the hinge assembly, and the screen is respectively covered on the upper folding screen body, the lower folding screen body and the shell opening of the shell.

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