Electric hinge driving apparatus, hinge apparatus and electronic device

Abstract

An electric hinge driving apparatus, a hinge apparatus and an electronic device. The electric hinge driving apparatus comprises: a lead screw and nut assembly, a first pivoting driving assembly, a second pivoting driving assembly, a spring assembly and a motor assembly; the lead screw and nut assembly comprises two lead screws arranged opposite to each other, and a nut sleeved on the two lead screws simultaneously; the second pivoting driving assembly and the first pivoting driving assembly are located on two opposite sides of the nut respectively or on a same side of the nut; the second pivoting driving assembly and the first pivoting driving assembly are axially retained along two ends of the lead screws; the first pivoting driving assembly comprises a first sliding block sleeved on the two lead screws simultaneously, and two first rotating arms arranged opposite to each other and sleeved on the two lead screws respectively; the second pivoting driving assembly comprises a second sliding block sleeved on the two lead screws simultaneously, and two second rotating arms arranged opposite to each other and sleeved on the two lead screws respectively. The hinge apparatus is capable of automatic unfolding and folding and achieves good position-holding stability.

Description

Electric hinge driving device, hinge device and electronic device TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, and in particular to an electric hinge driving device, a hinge device and an electronic device. BACKGROUND

[0002] With the advent of the mobile Internet era, the number of smart mobile devices is rising. Among the many mobile devices, foldable electronic devices, such as foldable phones, foldable tablets and notebook computers, have advantages such as portability and large display, and are favored by consumers. Foldable electronic devices achieve foldable function through a hinge. Among them, foldable electronic devices usually have multiple use states, such as a folded state, an unfolded state, and a hovering state (between the folded state and the unfolded state); in order to enable the device to be maintained in different folding states more stably, a certain rotational resistance and locking force, such as frictional resistance, mechanical locking force and magnetic locking force, are usually artificially added inside the hinge. The problem this brings is that manual flipping is laborious and the experience is not good, especially when opening from the folded state or folding from the unfolded state, a large locking force needs to be overcome. TECHNICAL PROBLEM

[0003] In related technologies, an electronic device generally includes a first body, a second body, and a hinge for connecting the first body and the second body, a motor is introduced in the hinge, and automatic opening and closing of the hinge is achieved through motor driving, so as to adjust the opening and closing of the first body and the second body, and thus the opening and closing experience of the foldable electronic device can be improved.

[0004] However, the rotation virtual position of the first body and the second body of the above-mentioned electronic device is large, and it is easy to shake under slight external force. The first body and the second body are indirectly connected through a friction connector and a motor assembly to realize rotational connection, and there is a certain rotational gap in each level connection of the motor assembly. These gaps have a stacking effect, which ultimately results in a large rotational virtual position between the first body and the second body, and the experience effect of the electronic device is poor.

[0005] Therefore, it is necessary to provide a new electric hinge driving device to solve the above technical problems. TECHNICAL SOLUTION

[0006] The purpose of the present application is to provide an electric hinge driving device that can be automatically unfolded and folded, and has good hovering stability.

[0007] In order to achieve the above-mentioned purpose, in a first aspect, the present application provides an electric hinge driving device, comprising: a screw nut assembly, a first flipping driving assembly, a second flipping driving assembly, a spring assembly and a motor assembly.

[0008] The screw nut assembly comprises two opposite screws and a nut simultaneously sleeved on the two screws, the two screws are in threaded transmission connection with the nut respectively, and the screws are in transmission connection with the motor assembly; the second turnover driving assembly and the first turnover driving assembly are located on opposite sides of the nut or on the same side of the nut respectively; the second turnover driving assembly and the first turnover driving assembly are axially clamped along two ends of the screw.

[0009] The first turnover driving assembly comprises a first slider simultaneously sleeved on the two screws and two first rotating arms oppositely arranged and simultaneously sleeved on the two screws; the first slider and the first rotating arms are sequentially stacked in the axial direction of the screw away from the second turnover driving assembly, the first slider is in sliding connection with the screw in the axial direction of the screw; one side of the first slider close to the first rotating arm is provided with a first contact surface, one side of the first rotating arm close to the first slider is provided with a second contact surface, the first contact surface abuts against the second contact surface, and the first slider extrudes the first rotating arm to make the first rotating arm rotate in a first turnover direction along the screw, the first turnover direction being an unfolding direction or a folding direction.

[0010] The second turnover driving assembly comprises a second slider simultaneously sleeved on the two screws and two second rotating arms oppositely arranged and simultaneously sleeved on the two screws, the second slider and the second rotating arms are sequentially stacked in the axial direction of the screw away from the first turnover driving assembly, and the second slider is in sliding connection with the screw in the axial direction of the screw; one side of the second slider close to the second rotating arm is provided with a third contact surface, one side of the second rotating arm close to the second slider is provided with a fourth contact surface, and the third contact surface abuts against the fourth contact surface; the second slider extrudes the second rotating arm to make the second rotating arm rotate in a second turnover direction along the screw, the second turnover direction being opposite to the first turnover direction.

[0011] The spring assembly is clamped between the first slider and the second slider, and the spring assembly is provided with a pre-pressure; the motor assembly is used for driving the screw to rotate, so as to drive the nut to move in the axial direction of the screw, and the nut extrudes the first slider or the second slider to realize rotation of the first rotating arm or the second rotating arm.

[0012] Preferably, the spring assembly comprises a first spring and a second spring, the first spring is clamped between the first slider and the nut, and the second spring is clamped between the second slider and the nut.

[0013] Preferably, the electric hinge driving device further comprises a pull rod fixed to the nut, two ends of the pull rod are provided with fixed shoulders, the pull rod passes through the first sliding block, the nut and the second sliding block in sequence, two ends of the pull rod abut against one side of the first sliding block and the second sliding block respectively away from the nut, and the first spring and the second spring are sleeved on the pull rod.

[0014] Preferably, the pull rod comprises a pull rod body, a first collar protruded from one end of the pull rod body, a fixed groove recessed from the middle of the pull rod body and a first recessed groove recessed from the other end of the pull rod body; the nut comprises a nut body, two inner thread structures respectively formed through the nut body and a bayonet formed through the nut body; two screw rods pass through the two inner thread structures and are screwed, the bayonet is sleeved in the fixed groove, the first spring is sleeved on the pull rod body and located between the first sliding block and the nut body, the second spring is sleeved on the pull rod body and located between the second sliding block and the nut body, the first recessed groove is provided with a first check ring, and the first check ring abuts against one side of the first sliding block away from the nut, and one side of the second sliding block away from the nut abuts against the first collar.

[0015] Preferably, the electric hinge driving device further comprises a pull rod, the pull rod comprises two pull rod bodies fixed to opposite sides of the nut and fixed shoulders bent and extended from end portions of the pull rod bodies away from the nut along the radial direction of the screw rod, and the two pull rod bodies are arranged along the axial direction of the screw rod.

[0016] The nut comprises a nut body, two inner thread structures respectively formed through the nut body and a mounting groove formed through the nut body and located between the two inner thread structures, two screw rods pass through the two inner thread structures and are screwed, and the spring assembly is arranged in the mounting groove, and two ends of the spring assembly abut against the two fixed shoulders respectively.

[0017] Preferably, each screw rod comprises a screw rod body, an outer thread structure formed on the screw rod body, a second collar protruded from one end of the screw rod body and a second recessed groove recessed from the other end of the screw rod body, the nut is screwed with the outer thread structure, the second recessed groove is provided with a second check ring, each first rotating arm is sleeved on one of the screw rod bodies and abuts against the corresponding second check ring, and each second rotating arm is sleeved on the other end of one of the screw rod bodies and abuts against the corresponding second collar.

[0018] Preferably, the motor assembly comprises a motor, a speed reducer connected to an output shaft of the motor, and a transmission member connected to the speed reducer, the transmission member being in transmission connection with the lead screw.

[0019] Preferably, the transmission member is a gear transmission assembly.

[0020] Preferably, the first slider and the two first rotating arms define a first turnover unit, and the second slider and the two second rotating arms define a second turnover unit, the first turnover unit and the second turnover unit each comprising one; the contact surface of the first slider and the two first rotating arms is a helical surface; and the contact surface of the second slider and the two second rotating arms is a helical surface.

[0021] Preferably, the first turnover unit and the second turnover unit each comprise at least two, adjacent first turnover units being mirror-imaged along an axial direction perpendicular to the lead screw, and adjacent second turnover units being mirror-imaged along an axial direction perpendicular to the lead screw; the contact surface of the first slider of at least one first turnover unit and the two first rotating arms is a helical surface; and the contact surface of the second slider of at least one second turnover unit and the two second rotating arms is a helical surface.

[0022] Preferably, adjacent first sliders between adjacent first turnover units are formed in one body; and adjacent second sliders between adjacent second turnover units are formed in one body.

[0023] Preferably, adjacent first rotating arms between adjacent first turnover units are formed in one body; and adjacent second rotating arms between adjacent second turnover units are formed in one body.

[0024] Preferably, the first turnover driving assembly and the second turnover driving assembly are axially clamped by arranging axial fixing shoulders at both ends of the lead screw, or by fixing the same-side rotating arms of the top of the first turnover driving assembly and the bottom of the second turnover driving assembly, or by fixing the sliders of the top of the first turnover driving assembly and the bottom of the second turnover driving assembly.

[0025] Preferably, when the second turnover driving assembly is located on the same side of the nut as the first turnover driving assembly, the electric hinge driving device further comprises a connecting beam, the first turnover driving assembly, the second turnover driving assembly, and the nut being sequentially arranged along the axial direction of the lead screw, and the first turnover driving assembly, the second turnover driving assembly, and the nut being fixedly connected to the lead screw through the connecting beam.

[0026] In a second aspect, the embodiments of the present application provide a hinge device, comprising a skeleton, two connecting arms arranged oppositely, and an electric hinge driving device as described above; the electric hinge driving device is installed on the skeleton, and the first rotating arm and the second rotating arm of the electric hinge driving device are connected with external equipment respectively; the two ends of the connecting arms are connected with the skeleton and the external equipment respectively.

[0027] Preferably, the first rotating arm and the second rotating arm are connected with the external equipment in a rotating connection or a sliding connection.

[0028] In a third aspect, the embodiments of the present application provide a hinge device, comprising a skeleton, and an electric hinge driving device as described above; the electric hinge driving device is installed on the skeleton, and the first rotating arm and the second rotating arm of the electric hinge driving device are fixedly connected with external equipment respectively.

[0029] In a fourth aspect, the embodiments of the present application provide a hinge device, comprising a skeleton, two connecting arms arranged oppositely, and an electric hinge driving device as described above; the electric hinge driving device is installed on the skeleton, and the first rotating arm and the second rotating arm of the electric hinge driving device are connected with external equipment respectively in a sliding groove connection; one end of the connecting arms is connected with the skeleton in a rotating connection, and the other end is fixedly connected with the external equipment.

[0030] In a fifth aspect, the embodiments of the present application provide an electronic device, comprising a first body, a second body, a triggering module, an intelligent controller, and a hinge device as described above; the triggering module and the intelligent controller are installed on the first body and / or the second body respectively; the hinge device is connected with the first body and the second body respectively.

[0031] The triggering module is used to generate a triggering signal in response to a user operation.

[0032] The intelligent controller is used to control the hinge device to work according to the triggering signal.

[0033] Preferably, the triggering module comprises at least one or a combination of multiple of a key module, a fingerprint identification module, an image acquisition module, and a voice input module.

[0034] Preferably, the electronic device further comprises a sensor, which is used to detect the relative position and the relative motion state of the first body and the second body, and / or the acting force of the first body and / or the second body on the hinge device; the intelligent controller judges the use condition of the electronic device according to the information detected by the sensor, outputs a corresponding motor control signal, controls the hinge device to work, and assists the user to operate the electronic device. Advantages

[0035] Compared with the prior art, in the electric hinge driving device, the second turnover driving assembly and the first turnover driving assembly are respectively located on opposite sides of the nut or the same side of the nut, the second turnover driving assembly and the first turnover driving assembly are axially clamped along two ends of the screw rod, the spring assembly is compressed by the motor assembly driving screw nut assembly to drive the first turnover driving assembly to rotate in the first turnover direction or drive the second turnover driving assembly to rotate in the second turnover direction, two screw rods are respectively in threaded transmission connection with the nuts, the screw rods are in transmission connection with the motor assembly, the first sliding blocks and the first swing arms are sequentially stacked in the direction away from the nut along the axial direction of the screw rod, the first sliding blocks are in sliding connection with the screw rod along the axial direction of the screw rod, the first sliding block is provided with a first contact surface on the side close to the first swing arm, the first swing arm is provided with a second contact surface on the side close to the first sliding block, the first contact surface and the second contact surface abut, and the first sliding block extrudes the first swing arm to make the first swing arm rotate in the first turnover direction along the screw rod, the second turnover driving assembly and the first turnover driving assembly are respectively located on opposite sides of the nut, the second sliding blocks and the second swing arms are sequentially stacked in the direction away from the nut along the axial direction of the screw rod, the second sliding blocks are in sliding connection with the screw rod along the axial direction of the screw rod, the second sliding block is provided with a third contact surface on the side close to the second swing arm, the second swing arm is provided with a fourth contact surface on the side close to the second sliding block, the third contact surface and the fourth contact surface abut, the second sliding block extrudes the second swing arm to make the second swing arm rotate in the second turnover direction along the screw rod, the second turnover direction is opposite to the first turnover direction, the spring assembly is clamped between the first sliding block and the second sliding block, and the spring assembly is provided with a pre-pressing force; the screw rod is driven to rotate by the motor assembly to drive the nut to move along the axial direction of the screw rod, and the nut extrudes the first sliding block or the second sliding block to realize the rotation of the first swing arm or the second swing arm; the electronic device is automatically unfolded and folded, the operation is convenient, the motor output torque is amplified, the hovering resistance is automatically reduced during the electric opening and closing process, and the motor torque requirement is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0037] Fig. 1 is a perspective structural schematic view of the electric hinge driving device provided by the embodiment of the present application;

[0038] Fig. 2 is a perspective structural exploded view of the electric hinge driving device provided by the embodiment of the present application;

[0039] Fig. 3 is a sectional view along line A-A of Fig. 1;

[0040] Fig. 4 is a sectional view along line B-B of Fig. 1;

[0041] Fig. 5 is an assembly view of a pull rod according to an embodiment of the present application;

[0042] Fig. 6 is an exploded view of Fig. 5;

[0043] Fig. 7 is a structural view of a transmission member according to an embodiment of the present application;

[0044] Fig. 8 is a schematic view of a contact surface according to an embodiment of the present application;

[0045] Fig. 9 is a schematic view of a contact surface according to an embodiment of the present application;

[0046] Fig. 10 is a schematic view of a contact surface according to an embodiment of the present application;

[0047] Fig. 11 is a schematic view of a contact surface according to an embodiment of the present application;

[0048] Fig. 12 is a schematic view of a contact surface according to an embodiment of the present application;

[0049] Fig. 13 is a schematic view of a contact surface according to an embodiment of the present application;

[0050] Fig. 14 is a schematic view of a contact surface according to an embodiment of the present application;

[0051] Fig. 15 is a schematic view of a contact surface according to an embodiment of the present application;

[0052] Fig. 16 is a schematic view of a contact surface according to an embodiment of the present application;

[0053] Fig. 17 is a schematic view of a contact surface according to an embodiment of the present application;

[0054] Fig. 18 is a schematic view of a contact surface according to an embodiment of the present application;

[0055] Fig. 19 is a schematic view of a contact surface according to an embodiment of the present application;

[0056] Fig. 20 is a schematic view of a contact surface according to an embodiment of the present application;

[0057] Fig. 21 is a schematic view of a contact surface according to an embodiment of the present application;

[0058] Fig. 22 is a schematic view of a spring assembly according to an embodiment of the present application;

[0059] Fig. 23 is a schematic view of a spring assembly according to an embodiment of the present application;

[0060] Fig. 24 is a schematic diagram of axial clamping of a lead screw according to an embodiment of the present application;

[0061] Fig. 25 is a schematic diagram of axial clamping of a lead screw according to an embodiment of the present application;

[0062] Fig. 26 is a schematic diagram of axial clamping of a lead screw according to an embodiment of the present application;

[0063] Fig. 27 is a schematic diagram of power transmission of a motor according to an embodiment of the present application;

[0064] Fig. 28 is a schematic diagram of power transmission of a motor according to an embodiment of the present application;

[0065] Fig. 29 is a schematic diagram of power transmission of a motor according to an embodiment of the present application;

[0066] Fig. 30 is a schematic diagram of power transmission of a motor according to an embodiment of the present application;

[0067] Fig. 31 is a schematic diagram of power transmission of a motor according to an embodiment of the present application;

[0068] Fig. 32 is a schematic diagram of assembly of a lead screw nut assembly according to an embodiment of the present application;

[0069] Fig. 33 is a schematic diagram of assembly of a lead screw nut assembly according to an embodiment of the present application;

[0070] Fig. 34 is a schematic diagram of assembly of a lead screw nut assembly according to an embodiment of the present application;

[0071] Fig. 35 is a schematic diagram of assembly of a lead screw nut assembly according to an embodiment of the present application;

[0072] Fig. 36 is a schematic diagram of a hinge device according to an embodiment of the present application;

[0073] Fig. 37 is a schematic diagram of a hinge device according to an embodiment of the present application;

[0074] Fig. 38 is a schematic diagram of a hinge device according to an embodiment of the present application;

[0075] Fig. 39 is a schematic diagram of a hinge device according to an embodiment of the present application;

[0076] Fig. 40 is a schematic diagram of a hinge device according to an embodiment of the present application;

[0077] Fig. 41 is a schematic diagram of a hinge device according to an embodiment of the present application;

[0078] Fig. 42 is a schematic diagram of a hinge device according to an embodiment of the present application;

[0079] Figure 43 is a schematic view of the assembly of the screw nut assembly according to an embodiment of the present application. Embodiments of the present application

[0080] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0081] Embodiment one

[0082] In combination with Figures 1 to 35, the electric hinge driving device 100 according to an embodiment of the present application comprises a screw nut assembly 1, a first turnover driving assembly 2, a second turnover driving assembly 3, a spring assembly 4 and a motor assembly 5.

[0083] The screw nut assembly 1 comprises two oppositely arranged screw rods 11 and a nut 12 sleeved on the two screw rods 11, the two screw rods 11 are in threaded transmission connection with the nut 12, and the screw rod 11 is in transmission connection with the motor assembly 5. The second turnover driving assembly 3 and the first turnover driving assembly 2 are respectively located on opposite sides of the nut 12 or on the same side of the nut 12, and the second turnover driving assembly 3 and the first turnover driving assembly 2 are clamped axially along the two ends of the screw rod 11. Among them, the two screw rods 11 are arranged symmetrically left and right, the screw rod 11 is driven to rotate by the motor 51, the screw rod 11 and the nut 12 are in rotational connection with each other, the rotation of the screw rod 11 drives the nut 12 to perform telescopic movement along the axial direction of the screw rod 11. When the screw rod 11 is placed vertically, the rotation of the screw rod 11 drives the nut 12 to perform vertical movement along the axial direction of the screw rod 11, thereby driving the first turnover driving assembly 2 or the second turnover driving assembly 3 to work.

[0084] The screw nut assembly 1 in this embodiment is used to convert the torque output by the motor 51 into axial thrust, which acts on the first and second turnover driving assemblies 2 and 3. In actual applications, different screw nut transmission modes can be used to achieve the same function. In the example shown in FIG. 32, a screw 11 and two nuts 12 are used in cooperation, and the overall assembly is arranged centrally. The screw 11 is driven to rotate by the motor 51, thereby driving the two nuts 12 to move upward or downward simultaneously. When the nuts 12 move upward, the lower nut 12 pushes the top slider of the second turnover driving assembly 3 to move upward; when the nuts 12 move downward, the upper nut 12 pushes the bottom slider of the first turnover driving assembly 2 to move downward. It should be noted that the rotation of the nuts 12 needs to be limited, which can be achieved by setting an axial sliding pair with the sliders of the first and second turnover driving assemblies 2 and 3, or the skeleton 201 of the hinge. In the example shown in FIG. 32, axial fixed shoulders 66 are provided at both ends of the screw 11 to achieve axial clamping.

[0085] Based on the example shown in FIG. 32, the fixed shoulders 66 of the screw 11 can also be arranged below the first slider 21 and above the second slider 31. In this case, fixed shoulders 66 need to be provided at both ends of the rotating shaft of the left and right rotating arms to achieve axial clamping, as shown in the example of FIG. 33.

[0086] Meanwhile, the bottom slider of the first turnover driving assembly 2 and the top slider of the second turnover driving assembly 3 can be fixedly connected, and the fixed shoulders 66 provided at both ends of the screw 11 can achieve axial clamping. The fixed shoulders 66 at both ends of the screw 11 can be arranged above the top slider and below the bottom slider, respectively, as shown in the example of FIG. 34. Alternatively, they can be arranged below the top slider and above the bottom slider, respectively, as shown in the example of FIG. 35.

[0087] Of course, the upper and lower nuts 12 can also be fixedly connected. After the upper and lower nuts 12 are fixedly connected, one of the upper and lower nuts 12 can not be provided with threads.

[0088] The screw nut assembly 1 can also be placed outside the first and second turnover driving assemblies 2 and 3, such as above the first turnover driving assembly 2 or below the second turnover driving assembly 3. In the example shown in FIG. 43, the screw nut assembly 1 is placed below the second turnover driving assembly 3, and a pull rod 6 is fixedly connected to the nut 12. The pull rod 6 is provided with two fixed shoulders 66, which are used to transmit the pushing force of the nut 12 to the bottom slider of the first turnover driving assembly 2 and the top slider of the second turnover driving assembly 3.

[0089] When the second turnover driving assembly 3 is located at the same side of the nut 12 as the first turnover driving assembly 2, the electric hinge driving device 100 further comprises a connecting beam 8, the first turnover driving assembly 2, the second turnover driving assembly 3 and the nut 12 are sequentially arranged along the axial direction of the screw rod 11 and are fixedly connected through the connecting beam 8. Specifically, the bottom slider of the first turnover driving assembly 2, the top slider of the second turnover driving assembly 3 and the screw rod 11 are fixedly connected through the middle connecting beam 8.

[0090] In addition to the screw rod 11 nut 12 transmission, there are other ways to convert the torque output by the motor assembly 5 into linear thrust, such as gear and rack transmission, tendon transmission, hydraulic transmission, pneumatic transmission, etc. These transmission modes can be used in combination with the embodiments of the application.

[0091] The first turnover driving assembly 2 is sleeved on the screw rod nut assembly 1, and the first turnover driving assembly 2 comprises a first slider 21 sleeved on two screw rods 11 and two first rotating arms 22 arranged oppositely and sleeved on two screw rods 11 respectively. The first slider 21 and the first rotating arm 22 are sequentially stacked away from the second turnover driving assembly 3 along the axial direction of the screw rod 11 away from the nut 12, and the first slider 21 and the screw rod 11 are slidably connected along the axial direction of the screw rod 11; the side of the first slider 21 close to the first rotating arm 22 is provided with a first contact surface 23, and the side of the first rotating arm 22 close to the first slider 21 is provided with a second contact surface 24, the first contact surface 23 and the second contact surface 24 abut, and the first slider 21 extrudes the first rotating arm 22 to make the first rotating arm 22 rotate along the screw rod 11 in the first turnover direction. Wherein, the first turnover direction is the unfolding direction or the folding direction.

[0092] Wherein, by sleeving two first rotating arms 22 on two screw rods 11 respectively and forming left-right symmetrical arrangement, the first slider 21 is arranged on the side of the first rotating arm 22 close to the nut 12. By providing the first slider 21 and the first rotating arm 22 with the first contact surface 23 and the second contact surface 24 matched with each other, the direction of the helical surface is set to the direction that the upward movement of the first slider 21 drives the first rotating arm 22 to rotate in the first turnover direction, thereby driving the two first rotating arms 22 to rotate in the first turnover direction.

[0093] The second overturning driving assembly 3 is sleeved on the screw nut assembly 1, the second overturning driving assembly 3 comprises a second sliding block 31 sleeved on two screw rods 11 at the same time and two second rotating arms 32 oppositely arranged and respectively sleeved on two screw rods 11, the second overturning driving assembly 3 is respectively located on opposite sides of the nut 12 with the first overturning driving assembly 2; the second sliding block 31 and the second rotating arm 32 are sequentially stacked away from the nut 12 to the other side of the nut 12 along the axial direction of the screw rod 11 away from the first overturning driving assembly 2, the second sliding block 31 and the screw rod 11 are slidably connected along the axial direction of the screw rod 11; the side of the second sliding block 31 close to the second rotating arm 32 is provided with a third helical surface 33, the side of the second rotating arm 32 close to the second sliding block 31 is provided with a fourth helical surface 34, and the third helical surface 33 and the fourth helical surface 34 abut; the second sliding block 31 extrudes the second rotating arm 32 to make the second rotating arm 32 rotate along the screw rod 11 in the second overturning direction, and the second overturning direction is opposite to the first overturning direction. Wherein, by sleeving two second rotating arms 32 on two screw rods 11 respectively and forming left-right symmetrical arrangement, the second sliding block 31 is arranged on the side of the second rotating arm 32 close to the nut 12. By providing the third helical surface 33 and the fourth helical surface 34 matched with each other on the second sliding block 31 and the second rotating arm 32, the direction of the helical surface is set to the direction of the second sliding block 31 moving downward to drive the second rotating arm 32 to rotate in the second overturning direction, thereby driving the two second rotating arms 32 to rotate in the second overturning direction.

[0094] In order to facilitate the description of the characteristics of the helical surface, the flattened slice diagram of the helical surface is used for description. Here, the helical surface of the left helical pair of the first overturning driving assembly 2 is taken as the description object, and the characteristics of other helical surfaces are similar, including the right helical surface of the first overturning driving assembly 2, the left and right helical surfaces of the second overturning driving assembly 3. The intermediate cylindrical surface (the average of the radius of the outer cylindrical surface and the radius of the inner hole) between the outer cylindrical surface of the cylindrical part of the left rotating arm of the first overturning driving assembly 2 and the inner hole is taken as the section, the cylindrical slice is obtained by cutting the left rotating arm and the sliding block, and the flattened slice diagram shown in FIG. 8 is obtained by flattening the cylindrical slice. In the flattened slice diagram, the first contact surface 23 and the second contact surface 24 of the rotating arm are matched with the first contact surface 23 and the second contact surface 24 of the sliding block respectively. The first contact surface 23 and the second contact surface 24 of the rotating arm / slidin block have the same shape characteristics.

[0095] Specifically, in the example shown in FIG. 2, each of the left and right rotating arms has two helical surfaces, and the left and right parts of the slider each have two matching helical surfaces. The helical surfaces of the left and right rotating arms are opposite in rotation direction and are left-right mirror symmetric. The helical surfaces on the same side (left side or right side) of the first flipping driving assembly 2 and the second flipping driving assembly 3 are the same in rotation direction. The flattened slice of the left helical surface of the first flipping driving assembly 2 is shown in FIG. 8. The protrusions 7 on which the first contact surface 23 and the second contact surface 24 are located are respectively referred to as the first tooth and the second tooth.

[0096] According to the size of the helix lead angle, the number of helical surfaces of the left / right rotating arm of the first / second flipping driving assembly 2 / 3 can be different. If the helix lead angle is large, the protrusions 7 will be relatively high and are prone to large deformation during operation. To reduce the deformation of the protrusions 7, the number of protrusions 7 can be reduced, and the remaining protrusions 7 can be widened. For example, only one protrusion 7 is used, as shown in the example of FIG. 9. At this time, the rotating arm and the slider only have one set of matching helical surfaces.

[0097] If the helix lead angle is small, the protrusions 7 are not prone to deformation during operation. At this time, the tooth width can be reduced and the number of teeth (the number of helical surfaces) can be increased, which will help to improve the balanced distribution of the interaction force between the rotating arm and the slider, and reduce stress and wear. For example, the number of helical surfaces is increased to three, as shown in the example of FIG. 10.

[0098] In the example shown in FIG. 2, the helical surfaces are in the form of straight lines in the flattened slice, and the lead angle is a constant value, which is conducive to achieving uniform motor opening and closing speed and driving torque.

[0099] In actual applications, the load of the foldable electronic device during the unfolding / folding process can be uneven, and the required driving torque is also variable. In some scenarios, a non-uniform opening and closing speed can also be required. At this time, a helical surface with a non-uniform lead angle can be used. For example, a segmented constant lead angle helical surface can be used, as shown in FIG. 11. A helical surface with a continuously variable lead angle can also be used, as shown in FIG. 12. The segmented constant lead angle helical surface can have 2 segments or more. The helical surface can also have a part of the interval as a constant lead angle helical surface and a part of the interval as a continuously variable lead angle helical surface.

[0100] In the example shown in FIG. 2, the helical surfaces on the same side of the first flipping driving assembly 2 and the second flipping driving assembly 3 have the same characteristics.

[0101] In actual applications, the load of the foldable electronic device during unfolding and folding can be different, or the speed requirement for unfolding and folding can be different. At this time, the helical surfaces on the same side of the first flipping driving assembly 2 and the second flipping driving assembly 3 can use different characteristics.

[0102] If the helical pair of the first overturning driving assembly 2 / second overturning driving assembly 3 needs a larger lead, and the number of the convex teeth 7 is as large as possible and the height of the convex teeth 7 is as low as possible, a plurality of helical transmission pairs can be axially stacked. The first overturning driving assembly 2 and the second overturning driving assembly 3 respectively have only one slider and one pair of rotating arms, forming one helical transmission pair on the left and one on the right, as shown in FIG. 13. Among them, the first slider 21 and the two first rotating arms 22 are defined as a first overturning unit 40, the second slider 31 and the two second rotating arms 32 are defined as a second overturning unit (not shown in the figure), the first overturning driving assembly 2 includes at least one first overturning unit 40, and the second overturning driving assembly 3 includes at least one second overturning unit. The contact surface of the first slider 21 and the two first rotating arms 22 is a helical surface; the contact surface of the second slider 31 and the two second rotating arms 32 is a helical surface.

[0103] In the example shown in FIG. 14, based on the example shown in FIG. 2, the first overturning unit 40 and the second overturning unit are both two, the two first overturning units 40 are mirror images arranged along the axial direction perpendicular to the screw rod 11; the two second overturning units are mirror images arranged along the axial direction perpendicular to the screw rod 11. The contact surface of the first slider 21 of the two first overturning units 40 and the two first rotating arms 22 is a helical surface; the contact surface of the second slider 31 of the two second overturning units and the two second rotating arms 32 is a helical surface.

[0104] Specifically, a slider is further stacked on the first rotating arm 22, and a helical matching surface is provided on the side of the slider in contact with the first rotating arm 22, forming a second helical pair. For the first overturning driving assembly 2, the direction of the first contact surface 23 is set to the direction in which the slider extrudes the rotating arm to make the rotating arm bear the first overturning direction torsion; similarly, for the second overturning driving assembly 3, the direction of the first contact surface 23 is set to the direction in which the slider extrudes the rotating arm to make the rotating arm bear the second overturning direction torsion. At this time, the helical transmission assembly has two groups of stacked helical pairs, and the equivalent lead is increased. Note that the characteristics of the helical surface of the first helical pair can be the same as those of the same side helical surface characteristics of the second helical pair, or can be different.

[0105] If it is still necessary to further increase the equivalent lead of the helical transmission assembly, referring to the example shown in FIG. 14, based on the example shown in FIG. 2, a plurality of sliders and rotating arms are alternately stacked, and a helical pair is provided on the contact surface of the slider and the rotating arm, forming a plurality of helical pair stacks. For the first overturning driving assembly 2, the direction of the helical surface is set to the direction in which the slider extrudes the rotating arm to make the rotating arm bear the first overturning direction torsion; similarly, for the second overturning driving assembly 3, the direction of the helical surface is set to the direction in which the slider extrudes the rotating arm to make the rotating arm bear the second overturning direction torsion.

[0106] The first and second flipping units are at least two, and adjacent two first flipping units 40 are mirror arranged along the axial direction perpendicular to the screw rod 11. Adjacent two second flipping units are mirror arranged along the axial direction perpendicular to the screw rod 11. The contact surface between the first slider 21 of at least two adjacent first flipping units 40 and the two first rotating arms 22 is a helical surface; the contact surface between the second slider 31 of at least two adjacent second flipping units and the two second rotating arms 32 is a helical surface. The adjacent first sliders 21 between the adjacent two first flipping units 40 are integrally formed, and the adjacent second sliders 31 between the adjacent two second flipping units are integrally formed. The adjacent first rotating arms 22 between the adjacent two first flipping units 40 are integrally formed, and the adjacent second rotating arms 32 between the adjacent two second flipping units are integrally formed. The integrally formed structure is compact in size.

[0107] Specifically, the example shown in FIG. 15 alternately stacks a slider and a pair of rotating arms on the basis of the example shown in FIG. 3, at this time, the screw transmission assembly has three groups of stacked screw pairs, so that the equivalent lead is further increased. Note that the helical surface features on the same side of each group of screw pairs can be the same or different.

[0108] Optionally, axially stacking multiple groups of screw pairs is applicable to the first flipping driving assembly 2 and the second flipping driving assembly 3, and the principle is similar. It should be noted that the bottommost component of the first flipping driving assembly 2 is a slider; the topmost component of the second flipping driving assembly 3 is a slider. The number of stacked screw pairs of the first flipping driving assembly 2 and the second flipping driving assembly 3 can be the same or different.

[0109] Specifically, another effect of axially stacking multiple groups of screw pairs is to increase the frictional resistance between the rotating arm and the slider, which is beneficial to improve the hovering stability, but also increases the axial size. If the main purpose is to increase the hovering stability, and the equivalent lead does not need to be increased, any one or more groups of screw pairs in the above multiple screw pair stacking scheme can be changed to a planar friction pair, but at least one group of screw pairs must be retained, which can effectively reduce the axial size. The example shown in FIG. 16 changes the second group of screw pairs to a planar friction pair on the basis of the example shown in FIG. 14, and the assembly has one group of screw pairs and one group of planar friction pairs.

[0110] The example shown in FIG. 17 changes the third group of screw pairs to a planar friction pair on the basis of the example shown in FIG. 14, and the assembly has two groups of screw pairs and one group of planar friction pairs.

[0111] The example shown in FIG. 18 changes the second group of screw pairs and the third group of screw pairs to planar friction pairs on the basis of the example shown in FIG. 14, and the assembly has one group of screw pairs and two groups of planar friction pairs.

[0112] Specifically, in the above embodiments, which group or groups of the planar friction pairs are selected can be chosen at will according to needs, and the transmission effects are the same. For example, FIG. 19 is an example in which the first group of screw pairs is changed to a planar friction pair on the basis of the example shown in FIG. 14, the assembly has two groups of screw pairs and one group of planar friction pairs, and the transmission effect of the assembly is the same as that of the example shown in FIG. 17.

[0113] FIG. 20 is an example in which the second group of screw pairs is changed to a planar friction pair on the basis of the example shown in FIG. 14, the assembly has two groups of screw pairs and one group of planar friction pairs, and the transmission effect of the assembly is the same as that of the example shown in FIG. 17.

[0114] FIG. 21 is an example in which the first group of screw pairs and the second group of screw pairs are changed to planar friction pairs on the basis of the example shown in FIG. 14, the assembly has one group of screw pairs and two groups of planar friction pairs, and the transmission effect of the assembly is the same as that of the example shown in FIG. 18.

[0115] In the example shown in FIG. 2, the thread directions of the left and right lead screws 11 are opposite.

[0116] In some cases, in order to facilitate transmission connection with the motor assembly 5, the thread directions of the left and right lead screws 11 can also be the same.

[0117] Preferably, the thread directions of the left and right lead screws 11 are opposite, and the directions are set to be beneficial to the rotation of the swing arm, that is, during the electrically unfolding or folding, the rotation direction of the lead screw 11 is the same as the rotation direction of the swing arm.

[0118] In the present embodiment, the first flip drive assembly 2 and the second flip drive assembly 3 are axially clamped by providing axial fixed shoulders at both ends of the lead screw 11, or by fixing the same side swing arm of the top of the first flip drive assembly 2 and the bottom of the second flip drive assembly 3, or by fixing the slider of the top of the first flip drive assembly 2 and the bottom of the second flip drive assembly 3.

[0119] The spring assembly 4 is clamped between the lead screw 11 and between the first sliding block 21 and the second sliding block 31, and is provided with a pre-pressing force. The motor assembly 5 drives the rotation of the lead screw 11, which drives the nut 12 to move along the axial direction of the lead screw 11, and the nut 12 presses the first sliding block 21 or the second sliding block 31 to rotate the first rotating arm 22 or the second rotating arm 32. The motor assembly 5 drives the rotation of the lead screw 11 to drive the nut 12 to press the spring assembly 4, so that the spring assembly 4 generates a corresponding pushing force on the first sliding block 21, and then the first rotating arm 22 is subjected to a torsion force in the first overturning direction, so that the first rotating arm 22 realizes the overturning function in the first overturning direction. At the same time, the motor assembly 5 drives the rotation of the lead screw 11 in the opposite direction to drive the nut 12 to press the spring assembly 4, so that the spring assembly 4 generates a corresponding pushing force on the second sliding block 31, and then the second rotating arm 32 is subjected to a torsion force in the second overturning direction, so that the second rotating arm 32 realizes the overturning function in the second overturning direction. When the same side rotating arms of the first overturning driving assembly 2 and the second overturning driving assembly 3 rotate cooperatively, the torsion forces cancel each other out, and the first rotating arm 22 and the second rotating arm 32 do not rotate. Under the action of the spring assembly 4, the helical surfaces of the first overturning driving assembly 2 and the second overturning driving assembly 3 have contact pressure, so that the relative movement of the rotating arm and the sliding block has a frictional resistance, and the frictional resistance plays a role in maintaining the hovering stability of the first rotating arm 22 and the second rotating arm 32.

[0120] In the embodiment, the spring assembly 4 includes a first spring 41 and a second spring 42, the first spring 41 is clamped between the first sliding block 21 and the nut 12, and the second spring 42 is clamped between the second sliding block 31 and the nut 12. The first spring 41 is arranged between the nut 12 and the first sliding block 21, the second spring 42 is arranged between the second sliding block 31 and the nut 12, and is provided with a pre-pressing force. The first spring 41 has an upward pushing force on the first sliding block 21, and then the first rotating arm 22 is subjected to a torsion force in the first overturning direction, so that the first rotating arm 22 realizes the overturning function in the first overturning direction. The second spring 42 has a downward pushing force on the second sliding block 31, and then the second rotating arm 32 is subjected to a torsion force in the second overturning direction, so that the second rotating arm 32 realizes the overturning function in the second overturning direction. Optionally, the spring can be one or more.

[0121] Specifically, by controlling the motor assembly 5 to rotate in a specific direction (such as the rotation direction of the first motor), the screw rod 11 can drive the nut 12 to move upward. The upward movement of the nut 12 pushes the first slider 21 upward through the spring assembly 4. At this time, the axial extrusion force of the second flip drive assembly 3 decreases, and thus the second flip direction torque decreases. At the same time, the upward movement of the nut 12 compresses the first spring 41, and the pressure of the first spring 41 increases, which increases the axial extrusion force of the first flip drive assembly 2 and the first flip direction torque. Therefore, during the upward movement of the nut 12, the second flip direction torque of the second flip drive assembly 3 decreases, the first flip direction torque of the first flip drive assembly 2 increases, and the combined torque is the first flip direction torque, which in turn drives the two first swing arms 22 to rotate in the first flip direction.

[0122] By controlling the motor assembly 5 to rotate in the opposite direction of a specific direction (such as the rotation direction of the second motor, which is opposite to the rotation direction of the first motor), the screw rod 11 can drive the nut 12 to move downward. The downward movement of the nut 12 pushes the second slider 31 downward through the spring assembly 4. At this time, the axial extrusion force of the first flip drive assembly 2 decreases, and thus the first flip direction torque decreases. At the same time, the downward movement of the nut 12 compresses the second spring 42, and the pressure of the second spring 42 increases, which increases the axial extrusion force of the second flip drive assembly 3 and the second flip direction torque. Therefore, during the downward movement of the nut 12, the first flip direction torque of the first flip drive assembly 2 decreases, and the second flip direction torque of the second flip drive assembly 3 increases, and the combined torque is the second flip direction torque, which in turn drives the two second swing arms 32 to rotate in the second flip direction.

[0123] The pre-pressures of the first spring 41 and the second spring 42 respectively provide the screw pairs of the first flip drive assembly 2 and the second flip drive assembly 3 with contact pressure, and the relative movement of the screw pairs has frictional resistance, which forms the relative rotation resistance of the swing arms and the sliders, and is conducive to maintaining the stability of the hovering state of the first swing arm 22 and the second swing arm 32.

[0124] In the example shown in FIG. 2, a spring is provided between the nut 12 and the slider of the first flip drive assembly 2 / second flip drive assembly 3, and is arranged between the left and right screw rods 11, and the number of springs is one set, as shown in FIG. 22. In actual application, different numbers and layouts of springs can be used. Using multiple springs can increase the axial extrusion force of the drive assembly, and thus increase the frictional resistance and improve the hovering stability.

[0125] As shown in the example in FIG. 22, there are two sets of upper and lower springs, and each set of spring is sleeved on the left and right screw rods 11. Alternatively, there are three sets of upper and lower springs, two sets of which are arranged on the left and right screw rods 11, and one set is arranged in the middle. Alternatively, there are two sets of upper and lower springs, which are arranged in the middle between the left and right screw rods 11.

[0126] As shown in the example of FIG. 23, each of the upper and lower springs has four groups, two of which are arranged on the left and right and sleeved on the left and right lead screws 11, and the other two of which are arranged in the middle between the left and right lead screws 11. Alternatively, the connection relationship between the upper and lower springs and the nut 12 can also be achieved in the form of an integrated long spring and the middle of the spring is fixed on the nut 12.

[0127] In the embodiment, the electric hinge driving device 100 further comprises a pull rod 6 fixed to the nut 12, both ends of the pull rod 6 are provided with fixed shoulders 66, the pull rod 6 sequentially passes through the first sliding block 21, the nut 12 and the second sliding block 31, both ends of the pull rod 6 respectively abut against one side of the first sliding block 21 and the second sliding block 31 away from the nut 12, and the first spring 41 and the second spring 42 are sleeved on the pull rod 6.

[0128] In the embodiment, the pull rod 6 comprises a pull rod body 61, a first shaft ring 62 protruding from one end of the pull rod body 61, a fixed groove 63 recessed from the middle of the pull rod body 61, and a first recess 64 recessed from the other end of the pull rod body 61. The nut 12 comprises a nut body 121, two internal thread structures 122 respectively formed through the nut body 121, and a bayonet 123 passing through the nut body 121; two lead screws 11 pass through the two internal thread structures 122 and are screwed, the bayonet 123 is arranged in the fixed groove 63 and is arranged in the bayonet 123, the first spring 41 is sleeved on the pull rod body 61 and located between the first sliding block 21 and the nut body 121, the second spring 42 is sleeved on the pull rod body 61 and located between the second sliding block 31 and the nut body 121, the first recess 64 is provided with a first check ring 65, the first check ring 65 abuts against one side of the first sliding block 21 away from the nut 12, and one side of the second sliding block 31 away from the nut 12 abuts against the first shaft ring 62.

[0129] Alternatively, the nut 6 further comprises a limiting groove 125 recessed from one side of the nut body 121 close to the second turnover driving assembly 3 to the side away from the second turnover driving assembly 3.

[0130] The electric hinge driving device 100 further comprises a pull rod 6, the pull rod 6 comprises two pull rod bodies 61' fixed on opposite sides of the nut 12 and a fixed shoulder 66 extending from the end of the pull rod body 61' away from the nut 12 to the radial direction of the screw rod 11, and the two pull rod bodies 61' are arranged along the axial direction of the screw rod 11. The nut 12 comprises a nut body 121', two internal thread structures 122 respectively formed in the nut body 121', and a mounting groove 124 formed in the nut body 121' and located between the two internal thread structures 122, the two screw rods 11 pass through the two internal thread structures 122 respectively and are screwed, the spring assembly 4 is arranged in the mounting groove 124, and the two ends of the spring assembly 4 abut against the two fixed shoulders 66 respectively. When the screw rod 11 drives the nut 12 to move upwards, the fixed shoulder 66 abutting against one side of the second turnover driving assembly 3 pulls the second slider 31 of the second turnover driving assembly 3 to move upwards; when the nut 12 moves downwards, the fixed shoulder 66 away from one side of the second turnover driving assembly 3 pulls the first slider 21 of the first turnover driving assembly 2 to move downwards. The pull rod 6 can reduce the frictional resistance of the electric opening and closing and improve the driving force.

[0131] Specifically, the pull rod 6 is fixed on the nut 12, and the function of the pull rod 6 is to transmit the thrust of the nut 12 to the bottom slider of the first turnover driving assembly 2 and the top slider of the second turnover driving assembly 3 in a specific form, so as to reduce the frictional resistance in the process of electric opening and closing. The fixed shoulders 66 provided at the two ends of the pull rod 6 pull the sliders of the second turnover driving assembly 3 or the first turnover driving assembly 2 to move upwards or downwards when the nut 12 moves upwards or downwards. In the example shown in FIG. 2, the pull rod 6 is axially fixed by cooperating the fixed slot 63 on the pull rod 6 with the bayonet 123 in the middle of the nut 12; one of the fixed shoulders 66 of the pull rod 6 is realized by a shaft ring, and the other fixed shoulder 66 is realized by cooperating a check ring with a check ring slot on the pull rod 6.

[0132] In actual application, the pull rod 6 can be one or more; the axial fixing mode of the pull rod 6 and the nut 12 can adopt other modes such as integration and welding; the fixed shoulders 66 at the two ends of the pull rod 6 can also adopt other axial fixing modes; the pull rod 6 is not necessarily a cylindrical rod, but can be any structure with two fixed shoulders 66 at the two ends.

[0133] The pull rod 6 is plate-shaped and is fixed to the nut 12. The middle spring directly contacts the sliders of the first turnover driving assembly 2 and the second turnover driving assembly 3 by passing through the nut 12.

[0134] Optionally, the pull rod 6 is not required to achieve the electric opening and closing and hovering functions, in which case the nut 12 transmits the thrust force to the bottom slider of the first flip drive assembly 2 / top slider of the second flip drive assembly 3 through a spring or direct contact.

[0135] In the embodiment, each of the lead screws 11 includes a lead screw body 111, an external thread structure 112 formed on the lead screw body 111, a second collar 113 protruded from one end of the lead screw body 111, and a second groove 114 recessed from the other end of the lead screw body 111, the nut 12 is screwed with the external thread structure 112, and the second groove 114 is provided with a second retaining ring 116, each of the first swing arms 22 is sleeved on one of the lead screw bodies 111 and abuts against the corresponding second retaining ring 116, and each of the second swing arms 32 is sleeved on the other end of one of the lead screw bodies 111 and abuts against the corresponding second collar 113.

[0136] Specifically, the first flip drive assembly 2 and the second flip drive assembly 3 need to be axially clamped to achieve the electric opening function. The axial clamping is achieved by providing two axial fixed shoulders 66 on the lead screw 11. As shown in FIG. 24, one of the fixed shoulders 66 is a collar, and the other fixed shoulder 66 is composed of an open retaining ring and a gasket 115. The retaining ring is matched with the retaining ring groove on the lead screw 11 to achieve axial fixation. The gasket 115 is provided with a special-shaped hole matched with the special-shaped cross section at the end of the lead screw 11, so that the gasket 115 rotates with the lead screw 11 and prevents the retaining ring from being worn. The use of the retaining ring facilitates installation and disassembly, and other axial fixation methods can be used in actual applications. This method can also be used in the multi-screw pair stacking example.

[0137] The axial clamping can also be achieved by fixing the top swing arm of the first flip drive assembly 2 and the bottom swing arm of the same side of the second flip drive assembly 3. If the swing arm is located at the top of the first flip drive assembly 2 and at the bottom of the second flip drive assembly 3, this method can be used, and the axial size can be more compact. As shown in FIG. 25, the axial clamping is achieved by fixing the swing arms of the same side based on the example shown in FIG. 2. This method can also be used in the multi-screw pair stacking example.

[0138] If the slider is located at the top of the first flip drive assembly 2 and at the bottom of the second flip drive assembly 3, the top slider of the first flip drive assembly 2 and the bottom slider of the second flip drive assembly 3 can be fixed to achieve clamping, and the axial size can be more compact. As shown in FIG. 26, the example is an example of a fixed slider achieving clamping. This method can also be used in the multi-screw pair stacking example.

[0139] The motor assembly 5 includes a motor 51, a reducer connected to the output shaft of the motor 51, and a transmission member 52 connected to the reducer, and the transmission member 52 is in transmission connection with the lead screws 11.

[0140] Specifically, the motor 51 starts to operate, drives the left and right lead screws 11 to rotate through the transmission member 52, and the rotation of the lead screws 11 drives the nut 12 to move upward or downward. The direction of the movement of the nut 12 can be controlled by controlling the rotation direction of the motor 51.

[0141] When the nut 12 moves upward, the bottom slider of the first overturning driving assembly 2 is pushed to move upward, and under the action of the internal screw pair of the driving assembly, the first overturning direction torque of the first overturning driving assembly 2 increases, the second overturning direction torque of the second overturning driving assembly 3 decreases, and the electric hinge driving device 100 generates the first overturning direction torque as a whole, thereby driving the rotating arm to rotate in the first overturning direction.

[0142] When the nut 12 moves downward, the top slider of the second overturning driving assembly 3 is pushed to move downward, and under the action of the internal screw pair of the driving assembly, the second overturning direction torque of the second overturning driving assembly 3 increases, the first overturning direction torque of the first overturning driving assembly 2 decreases, and the electric hinge driving device 100 generates the second overturning direction torque as a whole, thereby driving the rotating arm to rotate in the second overturning direction.

[0143] When the nut 12 is stationary, the first overturning driving assembly 2 and the second overturning driving assembly 3 generate the first overturning direction torque and the second overturning direction torque respectively under the action of the spring, and the resultant force of the two is insufficient to overcome the rotating frictional resistance of the rotating arm, so that the rotating arm is in a hovering state.

[0144] In this embodiment, the transmission member 52 is a gear transmission assembly.

[0145] In this embodiment, the torque output by the motor assembly 5 is transmitted to the left and right lead screws 11 through the transmission member 52. The transmission member 52 can be a gear, a worm gear, or a belt transmission. The power of the motor assembly 5 can be transmitted from either end of the lead screw 11 or from both ends simultaneously, and the number of motor assemblies 5 can be one or more. Different numbers and layouts of motors 51 can be used as needed. In the example shown in FIG. 27, one motor assembly 5 simultaneously transmits power to the left and right lead screws 11.

[0146] In the example shown in FIG. 28, two motor assemblies 5 respectively transmit power to the left and right lead screws 11.

[0147] In the example shown in FIG. 29, two motor assemblies 5 simultaneously transmit power to the left and right lead screws 11 from both ends.

[0148] In the example shown in FIG. 30, two motor assemblies 5 respectively transmit power to the left and right lead screws 11 from both ends.

[0149] In the example shown in FIG. 31, four motor assemblies 5 simultaneously transmit power to the left and right lead screws 11 from both ends.

[0150] Specifically, as shown in FIGS. 1-7, if the output shaft of the motor assembly 5 is coaxial or parallel to the lead screw 11, direct connection, gear transmission, or belt transmission can be used. The output shaft of the motor assembly 5 is engaged with the lead screw 11 through internal and external gears to achieve transmission connection. At the same time, when the output shaft of the motor assembly 5 is coaxial with the lead screw 11, direct transmission is used. Alternatively, a one-stage gear transmission is used. Alternatively, a two-stage gear transmission can also be used. If the output shaft of the motor assembly 5 is parallel but not coaxial to the lead screw 11, and the shaft distance is very small, an internal meshing gear transmission can also be used. The internal meshing transmission is used, in which the internal gear is connected to the lead screw 11, and the external gear is connected to the motor assembly 5.

[0151] Alternatively, the internal meshing transmission can also be used, in which the internal gear is connected to the motor assembly 5, and the external gear is connected to the lead screw 11. One motor assembly 5 can transmit power to the left and right lead screws 11 through gear transmission. The motor assembly 5 is directly connected to the left lead screw 11, and power is transmitted to the right lead screw 11 through four gears that mesh in sequence.

[0152] Alternatively, the motor assembly 5 can also be directly connected to an intermediate gear to transmit power to the left and right lead screws 11.

[0153] Alternatively, if the output shaft of the motor assembly 5 is not coaxial with the intermediate gear, a one-stage gear transmission can also be added to achieve misaligned transmission.

[0154] Considering the actual size and space requirements, there are different gear transmission methods for transmitting power from a group of motor assemblies 5 to the left and right lead screws 11 using two-stage gear transmission, which will not be described one by one here.

[0155] Embodiment Two

[0156] In combination with FIGS. 1-42, the embodiment of the present application provides a hinge device 200, which includes a framework 201, two oppositely arranged connecting arms 202, and an electric hinge driving device 100 as described above; the electric hinge driving device 100 is installed on the framework 201, the first rotating arm 22 and the second rotating arm 32 of the electric hinge driving device 100 are respectively connected to an external device, and the two ends of the connecting arm 202 are respectively in transmission connection with the framework 201 and the external device. It should be noted that the connection mode of the first rotating arm 22 and the second rotating arm 32 with the external device should ensure that the same side rotating arms of the first rotating arm 22 and the second rotating arm 32 rotate coordinately.

[0157] The first rotating arm 22 and the second rotating arm 32 are connected to the external device in a rotating connection or a sliding connection.

[0158] Specifically, the electric hinge driving device 100 can be used in combination with any foldable electronic device hinge to realize the electric opening and closing function. The electric hinge driving device 100 is installed on the hinge framework 201, and the rotating arms of the electric hinge driving device 100 are connected to the foldable electronic device body to drive the body to open and close. The connection mode of the rotating arms and the body can be any one of fixed connection, rotating connection, sliding connection, and sliding groove connection, as shown in FIGS. 36-39.

[0159] In order to realize different motion trajectory requirements, the hinge part can also be provided with left-right symmetrical connection arms 202, both ends of the connection arms 202 being rotatably connected to the body and the hinge framework 201, respectively. The left / right connection arms 202, the rotating arms, the body, and the hinge framework 201 form different types of four-bar mechanisms, as shown in the examples of FIGS. 40-42.

[0160] There can be one or more groups of the electric hinge driving device 100 in a foldable electronic device hinge.

[0161] In an optional embodiment of the present application, the hinge device 200 provided by the embodiment of the present application comprises a framework 201 and the electric hinge driving device 100 described above; the electric hinge driving device 100 is installed on the framework 201, and the first rotating arm 22 and the second rotating arm 32 of the electric hinge driving device 100 are fixedly connected to the external device, respectively.

[0162] In an optional embodiment of the present application, the hinge device 200 provided by the embodiment of the present application comprises a framework 201 and the electric hinge driving device 100 described above; the electric hinge driving device 100 is installed on the framework 201, and the first rotating arm 22 and the second rotating arm 32 of the electric hinge driving device 100 are fixedly connected to the external device, respectively.

[0163] Embodiment three

[0164] The embodiment of the present application provides an electronic device comprising a first body 301, a second body 302, a trigger module, a smart controller, and the hinge device 200 described above; the trigger module and the smart controller are installed on the first body 301 and / or the second body 302, respectively; and the hinge device 200 is connected to the first body 301 and / or the second body 302, respectively.

[0165] The first rotating arm 22 and the second rotating arm 32 are connected to the hinge device 200 in any one of rotating connection, sliding connection and sliding groove connection.

[0166] The trigger module is configured to generate a trigger signal in response to a user operation.

[0167] The smart controller is configured to control the hinge device 200 to work according to the trigger signal. The trigger module is configured to generate a trigger signal in response to a user operation, and the smart controller is configured to control the start and stop, steering and rotating speed of the motor 51 according to the trigger signal.

[0168] In this embodiment, the trigger module includes at least one or a combination of multiple types of key module, fingerprint recognition module, image acquisition module and voice input module.

[0169] In this embodiment, the electronic device further includes a sensor configured to detect the relative position and relative motion state of the first body 301 and the second body 302, and / or the force of the first body 301 and / or the second body 302 acting on the hinge device 200; the smart controller is configured to determine the use condition of the electronic device according to the information detected by the sensor, output a corresponding motor 51 control signal, and control the hinge device 100 to work, thereby assisting the user in operating the electronic device.

[0170] In this embodiment, the electric hinge driving device 100 is used in a foldable electronic device, and the electronic device further includes a trigger module and a smart controller. The trigger module is configured to generate a trigger signal in response to a user operation, and the smart controller is configured to control the start and stop, steering and rotating speed of the motor 51 according to the trigger signal. The trigger module includes at least one of a key module, a fingerprint recognition module, an image acquisition module and a voice input module.

[0171] In this embodiment, the electric hinge driving device 100 is used in a foldable electronic device, and the electronic device further includes a sensor and a smart controller. The sensor is configured to detect the relative position and relative motion state of the first body 301 and the second body 302, and / or the force of the first body 301 and / or the second body 302 acting on the hinge. The smart controller is configured to determine the use condition of the electronic device according to the information detected by the sensor, output a motor 51 control signal, and assist the user in operating the foldable electronic device, such as assisting in unfolding / folding, automatic flattening / folding locking.

[0172] Compared with the prior art, in the electric hinge driving device, the second turnover driving assembly and the first turnover driving assembly are respectively located on opposite sides of the nut or the same side of the nut, the second turnover driving assembly and the first turnover driving assembly are axially clamped along two ends of the screw rod, the spring assembly is compressed by the motor assembly driving screw nut assembly to drive the first turnover driving assembly to realize the first turnover direction turnover or drive the second turnover driving assembly to realize the second turnover direction turnover function, two screw rods are respectively in threaded transmission connection with the nut, and the screw rod is in transmission connection with the motor assembly, the first slider and the first rotary arm are sequentially stacked in the direction away from the nut along the axial direction of the screw rod, the first slider is in sliding connection with the screw rod along the axial direction of the screw rod, the first contact surface is arranged on the side of the first slider close to the first rotary arm, the second contact surface is arranged on the side of the first rotary arm close to the first slider, the first contact surface and the second contact surface abut, and the first slider extrudes the first rotary arm to make the first rotary arm rotate along the screw rod in the first turnover direction, the first turnover direction is the unfolding direction or the folding direction, the second turnover driving assembly and the first turnover driving assembly are respectively located on opposite sides of the nut, the second slider and the second rotary arm are sequentially stacked in the direction away from the nut along the axial direction of the screw rod, the second slider is in sliding connection with the screw rod along the axial direction of the screw rod, the third contact surface is arranged on the side of the second slider close to the second rotary arm, the fourth contact surface is arranged on the side of the second rotary arm close to the second slider, the third contact surface and the fourth contact surface abut, the second slider extrudes the second rotary arm to make the second rotary arm rotate along the screw rod in the second turnover direction, the second turnover direction is opposite to the first turnover direction, the spring assembly is clamped between the first slider and the second slider, and the spring assembly is provided with a pre-pressure, the screw rod is driven to rotate by the motor assembly, for driving the nut to move along the axial direction of the screw rod, and the nut extrudes the first slider or the second slider to realize the rotation of the first rotary arm or the second rotary arm, the electronic device is automatically unfolded and folded, the motor output torque is amplified, the hovering resistance is automatically reduced during the electric opening and closing process, and the motor torque requirement is reduced.

[0173] The above only describes the embodiments of the present application, and it should be pointed out that those skilled in the art can make improvements without departing from the inventive concept, and these improvements are within the protection scope of the present application.

Claims

1. An electric hinge drive apparatus, characterized by, The electric hinge driving device comprises a screw nut assembly, a first turnover driving assembly, a second turnover driving assembly, a spring assembly and a motor assembly; The screw nut assembly comprises two oppositely arranged screw rods and a nut simultaneously sleeved on the two screw rods, the two screw rods are in threaded transmission connection with the nut respectively, and the screw rods are in transmission connection with the motor assembly; the second turnover driving assembly and the first turnover driving assembly are located on opposite sides of the nut or the same side of the nut respectively; the second turnover driving assembly and the first turnover driving assembly are axially clamped along the two ends of the screw rod; The first turnover driving assembly comprises a first slider simultaneously sleeved on the two screw rods and two first rotating arms oppositely arranged and respectively sleeved on the two screw rods; the first slider and the first rotating arms are sequentially stacked in the axial direction of the screw rod away from the second turnover driving assembly, the first slider and the screw rod are in sliding connection in the axial direction of the screw rod; one side of the first slider close to the first rotating arm is provided with a first contact surface, one side of the first rotating arm close to the first slider is provided with a second contact surface, the first contact surface and the second contact surface abut, and the first slider extrudes the first rotating arm to make the first rotating arm rotate in a first turnover direction along the screw rod, the first turnover direction being an unfolding direction or a folding direction; The second turnover driving assembly comprises a second slider simultaneously sleeved on the two screw rods and two second rotating arms oppositely arranged and respectively sleeved on the two screw rods, the second slider and the second rotating arms are sequentially stacked in the axial direction of the screw rod away from the first turnover driving assembly, and the second slider and the screw rod are in sliding connection in the axial direction of the screw rod; one side of the second slider close to the second rotating arm is provided with a third contact surface, one side of the second rotating arm close to the second slider is provided with a fourth contact surface, and the third contact surface and the fourth contact surface abut; the second slider extrudes the second rotating arm to make the second rotating arm rotate in a second turnover direction along the screw rod, the second turnover direction being opposite to the first turnover direction; The spring assembly is clamped between the first slider and the second slider, and the spring assembly is provided with a pre-pressure; the motor assembly is used for driving the screw rod to rotate, so as to drive the nut to move in the axial direction of the screw rod, and the nut extrudes the first slider or the second slider to realize the rotation of the first rotating arm or the second rotating arm.

2. The electro-motorically driven articulation drive of claim 1, wherein The spring assembly comprises a first spring and a second spring, the first spring is clamped between the first slider and the nut, and the second spring is clamped between the second slider and the nut.

3. The electro-motive hinge drive apparatus according to claim 2, characterized in that The electric hinge driving device further comprises a pull rod fixed to the nut, both ends of the pull rod are provided with fixing shoulders, the pull rod sequentially passes through the first slider, the nut and the second slider, both ends of the pull rod abut on one side of the first slider and the second slider away from the nut respectively, and the first spring and the second spring are sleeved on the pull rod.

4. The electro-motive hinge drive apparatus according to claim 3, characterized in that The pull rod comprises a pull rod body, a first collar protruded from one end of the pull rod body, a fixing groove formed by a middle recess of the pull rod body, and a first recess formed by the other end of the pull rod body; the nut comprises a nut body, two inner thread structures formed through the nut body respectively, and a bayonet formed through the nut body; the two lead screws are screwed through the two inner thread structures respectively, the bayonet is arranged in the fixing groove, the first spring is sleeved on the pull rod body and located between the first slider and the nut body, the second spring is sleeved on the pull rod body and located between the second slider and the nut body, the first recess is provided with a first check ring, and the first check ring abuts against the side of the first slider away from the nut; and the side of the second slider away from the nut abuts against the first collar.

5. The electro-motive hinge drive apparatus according to claim 1, characterized in that, The electric hinge driving device further comprises a pull rod, the pull rod comprises two pull rod bodies fixed to opposite sides of the nut and fixing shoulders extended from the ends of the pull rod bodies away from the nut in the radial direction of the lead screw, and the two pull rod bodies are arranged in the axial direction of the lead screw. The nut comprises a nut body, two inner thread structures formed through the nut body respectively, and a mounting groove formed through the nut body and located between the two inner thread structures, the two lead screws are screwed through the two inner thread structures respectively, and the spring assembly is arranged in the mounting groove and abuts against the two fixing shoulders at two ends thereof.

6. The electro-motive hinge drive apparatus according to claim 1, wherein Each of the lead screws comprises a lead screw body, an outer thread structure formed on the lead screw body, a second collar protruded from one end of the lead screw body, and a second recess formed by the other end of the lead screw body, the nut is screwed with the outer thread structure, the second recess is provided with a second check ring, each of the first rotary arms is sleeved on one of the lead screw bodies and abuts against the corresponding second check ring, and each of the second rotary arms is sleeved on the other end of one of the lead screw bodies and abuts against the corresponding second collar.

7. The electro-motive hinge drive apparatus according to claim 1, wherein The motor assembly comprises a motor, a speed reducer connected in transmission with an output shaft of the motor, and a transmission member connected in transmission with the speed reducer, and the transmission member is connected in transmission with the lead screw.

8. The electro-motive hinge drive device according to claim 7, characterized in that The transmission member is a gear transmission assembly.

9. The electro-motive hinge drive of claim 1, wherein, The first slider and the two first rotary arms are defined as a first overturning unit, and the second slider and the two second rotary arms are defined as a second overturning unit, and each of the first overturning unit and the second overturning unit comprises one; the contact surfaces of the first slider and the two first rotary arms are helical surfaces; and the contact surfaces of the second slider and the two second rotary arms are helical surfaces.

10. The electro-motorically driven articulation drive of claim 9, wherein, The first and second turnover units are at least two, and adjacent two first turnover units are mirror images arranged along the axial direction perpendicular to the screw rod, and adjacent two second turnover units are mirror images arranged along the axial direction perpendicular to the screw rod; the contact surface between the first slider of at least one first turnover unit and the two first rotary arms is a spiral surface; and the contact surface between the second slider of at least one second turnover unit and the two second rotary arms is a spiral surface.

11. The electro-motive hinge drive device according to claim 10, characterized in that The adjacent first sliders between adjacent two first turnover units are integrally formed; and the adjacent second sliders between adjacent two second turnover units are integrally formed.

12. The electro-motive hinge drive apparatus according to claim 10, wherein The adjacent first rotary arms between adjacent two first turnover units are integrally formed; and the adjacent second rotary arms between adjacent two second turnover units are integrally formed.

13. The electro-motive hinge drive apparatus according to claim 1, characterized in that, The first and second turnover driving assemblies are axially clamped by arranging axial fixed shoulders at both ends of the screw rod, or by fixing the same side rotary arms of the top of the first turnover driving assembly and the bottom of the second turnover driving assembly, or by fixing the sliders of the top of the first turnover driving assembly and the bottom of the second turnover driving assembly.

14. The electro-motorically driven articulation drive of claim 1, wherein, When the second turnover driving assembly is located on the same side of the nut as the first turnover driving assembly, the electric hinge driving device further comprises a connecting beam, and the first turnover driving assembly, the second turnover driving assembly and the nut arranged in sequence along the axial direction of the screw rod are fixedly connected between the screw rod and the connecting beam.

15. A hinge device, characterized by The electric hinge driving device comprises a skeleton, two oppositely arranged connecting arms and the electric hinge driving device according to any one of claims 1-14; the electric hinge driving device is mounted on the skeleton, the first rotary arm and the second rotary arm of the electric hinge driving device are respectively connected with an external device, and the two ends of the connecting arm are respectively in transmission connection with the skeleton and the external device.

16. The hinge device of claim 15, wherein, The connection mode between the first and second rotary arms and the external device is rotary connection or sliding connection.

17. A hinge device, characterized by The electric hinge driving device comprises a skeleton and the electric hinge driving device according to any one of claims 1-14; the electric hinge driving device is mounted on the skeleton, and the first rotary arm and the second rotary arm of the electric hinge driving device are respectively in fixed connection with an external device.

18. A hinge device, characterized by The electric hinge driving device comprises a skeleton, two oppositely arranged connecting arms and the electric hinge driving device according to any one of claims 1-14; the electric hinge driving device is mounted on the skeleton, the first rotary arm and the second rotary arm of the electric hinge driving device are respectively in sliding groove connection with an external device, and one end of the connecting arm is in rotary connection with the skeleton, and the other end is in fixed connection with the external device.

19. An electronic device, comprising: The hinge device comprises a first body, a second body, a trigger module, an intelligent controller and the hinge device according to any one of claims 15-18, the trigger module and the intelligent controller are respectively mounted on the first body and / or the second body; and the hinge device is connected with the first body and the second body respectively. The trigger module is configured to generate a trigger signal in response to a user operation; The intelligent controller is configured to control the hinge device to work according to the trigger signal.

20. The electronic device of claim 19, wherein, The trigger module comprises at least one or a combination of multiple of a key module, a fingerprint identification module, an image acquisition module and a voice input module.

21. The electronic device of claim 19 or 20, wherein, The electronic device further comprises a sensor configured to detect relative positions and relative motion states of the first body and the second body, and / or acting forces of the first body and / or the second body on the hinge device; the intelligent controller is configured to determine a use condition of the electronic device according to information detected by the sensor, output a corresponding motor control signal, and control the hinge device to work, thereby assisting a user in operating the electronic device to work.

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