CN117749924A

CN117749924A - Folding device, housing assembly and electronic equipment

Info

Publication number: CN117749924A
Application number: CN202311764035.8A
Authority: CN
Inventors: 梁子豪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2023-12-20
Filing date: 2023-12-20
Publication date: 2024-03-22

Abstract

The application provides a folding device, casing subassembly and electronic equipment, folding device include base, rotation piece, first gear assembly, pivot, first cam piece, second cam piece, elastic component. The rotating piece rotates to be connected with the base, the first gear assembly comprises a first gear and a second gear which are coaxially and fixedly arranged, and the first gear is meshed with the rotating piece. The rotating shaft is arranged on the base, the first cam piece is sleeved on the rotating shaft and comprises a first gear part meshed with the second gear and a cam part with a first cam surface. The second cam piece is sleeved on the rotating shaft and can slide relative to the rotating shaft, and the second cam piece is provided with a second cam surface which abuts against the first cam surface. The elastic piece is sleeved on the rotating shaft, one end of the elastic piece is propped against one side, deviating from the first cam piece, of the second cam piece, and the other end of the elastic piece can be fixed relative to the rotating shaft. This application accessible first gear portion, second gear, first gear, and rotate the size of piece mutually supporting thereby according to demand and application scene adjustment torsion.

Description

Folding device, housing assembly and electronic equipment

Technical Field

The application belongs to folding device technical field, concretely relates to folding device, housing assembly and electronic equipment.

Background

The mobile terminal industry is competing to trend to be ultrathin with large screens, but the large screens bring about oversized whole machine size and inconvenient carrying, and the foldable electronic equipment can change the size of the electronic equipment due to the folding function of the electronic equipment so as to solve the problems, so that the electronic equipment is popular with wide users. Electronic equipment relies on folding device to realize folding function, thereby the torsion is provided to torsion mechanism in the folding device to realize opening and shutting feel and hover effect, but the torsion of folding device is usually invariable at present, can't adjust.

Disclosure of Invention

In view of this, a first aspect of the present application provides a folding device comprising:

a base;

the rotating piece is rotationally connected with the base;

the first gear assembly comprises a first gear and a second gear which are coaxially and fixedly arranged, and the first gear is meshed with the rotating piece;

the rotating shaft is arranged on the base;

the first cam piece is sleeved on the rotating shaft and comprises a first gear part meshed with the second gear and a cam part provided with a first cam surface, and the cam part is fixed on the first gear part;

the second cam piece is sleeved on the rotating shaft and can slide relative to the rotating shaft, and one side, close to the first cam piece, of the second cam piece is provided with a second cam surface which abuts against the first cam surface; and

The elastic piece is sleeved on the rotating shaft, one end of the elastic piece is propped against one side, away from the first cam piece, of the second cam piece, and the other end of the elastic piece can be fixed relative to the rotating shaft;

when the rotating piece rotates relative to the base, the first gear assembly rotates relative to the base, so that the first cam piece rotates relative to the base, and the second cam piece slides along the rotating shaft.

The folding device provided in the first aspect of the application can make the cam part in the first cam member have torsion by utilizing the mutual cooperation of the first cam member, the second cam member, the rotating shaft and the elastic member, namely the first cam member has torsion, and the torsion of the first cam member is the first torsion at the moment. In the related art, the cam portion of the first cam member is directly and fixedly connected to the rotating member, so that the torque force of the rotating member is the torque force of the first cam member, i.e. the first torque force. In other words, the torque of the rotating member is larger than the torque of the first cam member, and the torque of the rotating member is equal to the torque of the first cam member, so that the torque of the rotating member is always constant and cannot be adjusted. But this application separates the cam portion that rotates piece and first cam piece, makes cam portion and first gear portion combination form first cam piece to add by coaxial and fixed first gear assembly that sets up first gear and second gear combination, in other words first gear and second gear's axis of rotation is the same, and first gear and second gear can synchronous rotation. The first gear is meshed with the rotating piece, the second gear is meshed with the first gear portion, so that the first gear and the rotating piece can rotate relatively, and the second gear and the first gear portion can rotate relatively.

When the rotating piece rotates relative to the base, the rotating piece drives the first gear to synchronously rotate, the first gear drives the coaxial second gear to synchronously rotate, the second gear drives the first gear to synchronously rotate, and finally the cam part rotates, so that the first torsion is formed by matching with the second cam piece, the rotating shaft, the elastic piece and the blocking piece. The torque of the cam part can be finally transmitted to the rotating member through the first gear part, the second gear and the first gear, so that the rotating member has corresponding torque, for example, the torque of the rotating member is the second torque.

In summary, the present application can make the rotating member finally have the second torque force through the cooperation of the first gear portion, the second gear, the first gear, and the rotating member. The first torsion can be equal to the second torsion, the first torsion can also be greater than the second torsion, and the first torsion can also be less than the second torsion, so that the size of the second torsion can be changed by adjusting the first gear part, the second gear, the first gear and the rotating piece according to the requirements in actual application, and the purpose of torsion adjustment is realized. For example, when the second torque force is greater than the first torque force, the torque force is amplified, so that the second torque force of the rotating member is greater than the first torque force of the first cam member, and therefore, the torque force of the rotating member can be greater than the torque force of the rotating member in the related art, that is, the second torque force is greater than the first torque force, and the torque force is increased. The torsion is increased, so that miniaturization of the folding device can be realized, namely, the first cam piece, the second cam piece, the elastic piece and other parts can still maintain enough torsion after the sizes of the parts are reduced. And the elastic force of the elastic piece can be reduced on the premise of meeting the required torsion, so that the abrasion degree of the first cam piece and the second cam piece is reduced, and the service life of the parts is prolonged.

A second aspect of the present application provides a housing assembly comprising a first housing, a second housing, and a folding device as provided in the first aspect of the present application, the folding device being connected between the first housing and the second housing.

The shell assembly that this application second aspect provided through adopting the folding device that this application first aspect provided, can realize torsion adjustable, realizes folding device miniaturization to reduce the degree of wear of first cam spare and second cam spare, improve life.

A third aspect of the present application provides an electronic device comprising a flexible screen, and a housing assembly as provided in the second aspect of the present application, the flexible screen being provided on the same side of the first housing, the second housing, and the folding device.

The electronic equipment that this application third aspect provided through adopting the casing subassembly that this application second aspect provided, can realize torsion adjustable, realizes folding device miniaturization to reduce the degree of wear of first cam spare and second cam spare, improve life.

Drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be described below.

Fig. 1 is a schematic perspective view of a folding device in an unfolded state according to an embodiment of the present application.

Fig. 2 is an exploded view of the folding device shown in fig. 1.

Fig. 3 is a schematic view of the rotor, the first rotor, and the first gear assembly in accordance with an embodiment of the present disclosure.

Fig. 4 is a schematic perspective view of a folding device in a folded state according to an embodiment of the present application.

Fig. 5 is a schematic cross-sectional view of the folding device shown in fig. 1 along the A-A direction.

Fig. 6 is a schematic cross-sectional view of the folding device shown in fig. 1 along the direction B-B.

Fig. 7 is an exploded view of a rotating member and a base according to an embodiment of the present application.

Fig. 8 is an exploded view of the rotating member and the base shown in fig. 7 from another perspective.

Fig. 9 is a schematic cross-sectional view of the rotating member and the base when the folding device is in an unfolded state according to an embodiment of the present application.

Fig. 10 is a schematic cross-sectional view of the rotating member and the base when the folding device is in a folded state according to an embodiment of the present disclosure.

Fig. 11 is a schematic perspective view of a folding device according to an embodiment of the present application when the folding device further includes a rotating member.

Fig. 12 is a schematic cross-sectional view of the folding device shown in fig. 11 along the C-C direction.

Fig. 13 is a schematic perspective view of a rotating member, a first cam member, a first gear assembly, a second gear assembly, and a rotating member according to an embodiment of the present disclosure.

Fig. 14 is a schematic perspective view of a folding device according to another embodiment of the present application when the folding device further includes a rotating member.

Fig. 15 is a schematic perspective view of a rotating member, a first cam member, a first gear assembly, a second gear assembly, and a rotating member according to another embodiment of the present disclosure.

Fig. 16 is a schematic cross-sectional view of the folding device shown in fig. 14 along the direction D-D.

Fig. 17 is a schematic cross-sectional view of the folding device shown in fig. 14 along the E-E direction.

Fig. 18 is a schematic perspective view of a folding device according to another embodiment of the present disclosure in an unfolded state.

Fig. 19 is an exploded view of the folding device shown in fig. 18.

Fig. 20 is an exploded view of one of the track mechanisms in the folding device shown in fig. 19.

Fig. 21 is a front view of the folding device shown in fig. 18.

Fig. 22 is a schematic perspective view of a folding device according to another embodiment of the present disclosure in a folded state.

Fig. 23 is a front view of the folding device shown in fig. 22.

Fig. 24 is a schematic perspective view of a housing assembly in an unfolded state according to an embodiment of the present application.

Fig. 25 is a schematic perspective view of a housing assembly in a folded state according to an embodiment of the present application.

Fig. 26 is a schematic perspective view of an electronic device in an unfolded state according to an embodiment of the present application.

Fig. 27 is a schematic perspective view of an electronic device in a folded state according to an embodiment of the present application.

Description of the reference numerals:

the folding device-1, the screen accommodating space-1 a, the track mechanism-1 b, the shell component-2, the electronic equipment-3, the base-10, the bottom surface-100, the top surface-101, the limit part-11, the rotating shaft-20, the first gear component-21, the first shaft-210, the first gear-211, the second gear-212, the first cam part-22, the first gear part-221, the cam part-222, the first cam surface-2220, the second cam part-23, the second cam surface-2300, the elastic part-24, the blocking part-25, the blocking part-251, the gasket-252, the buckling part-253, the second gear component-26, the second shaft-260, the third gear-261, the fourth gear-262, the rotating part-30 ', the first rotating part-30, the rotating part-40', the second rotating part-40, the sliding block-42, the first rolling shaft-43, the second gear part-44, the first part-441, the tooth-4410, the second part-442, the limit groove-4420, the rotating part-45, the connecting part-50, the back surface-50, the buckling part-52, the second bearing part-500, the second bending part-930, the flexible supporting part-80, the flexible part-93, the flexible part-80, the shell-93 and the flexible part-93.

Detailed Description

The following are preferred embodiments of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be within the scope of the present application.

Along with the market demand of 'display screen display area' of terminal products such as mobile phones and flat panels, the mobile terminal industry is competing to trend to be ultrathin with large screens, but the large screens bring about inconvenient carrying due to overlarge size of the whole machine, and the smart phone industry is coming to experience revolution brought about by morphological innovation. The form of the display screen of the mobile phone product is developed from an initial hard screen to a flexible screen, from a small screen to a large screen, and from a static mechanism to a motion mechanism, all mobile phone factories are developing folding screens recently, and striving to expand the form and display boundary of the mobile phone product so that the mobile phone product has the functions of a mobile phone, a tablet personal computer and even a computer. As the electronic equipment with a new display screen form, the foldable display screen terminal can be unfolded or closed due to the folding function, has a larger display area in an unfolded state and has a smaller whole machine size in a folded state, so that the problems can be solved, and the foldable display screen terminal is popular with a large number of users.

The foldable display screen terminal realizes the folding function by virtue of the folding device in the foldable display screen terminal, and various torsion mechanisms are usually arranged in the folding device to provide torsion, so that the opening and closing hand feeling and the hovering effect are realized. For example, an axial cam scheme employs two cams to engage a spring, with the cams constantly compressing the spring, so that the spring provides an axial positive pressure that can be converted into frictional force to create torsion. The torque force of the existing folding device is usually fixed and cannot be adjusted, such as torque force amplification or torque force reduction. For example, during repeated opening and closing of the product, the two cam surfaces contacted by the two cams gradually wear to reduce the torsion force, so that the opening and closing hand feeling force gradually weakens, and the hovering angle gradually reduces (for example, from 30 degrees to 120 degrees to 50 degrees to 100 degrees), and the user experience is affected. From another point of view, the various components in the folding device are reduced in size when the folding device is miniaturized, such as the spring, which also reduces in size, which also results in reduced torque. If the size of the spring is kept unchanged, the abrasion problem of the two cams after the size is reduced is further aggravated.

In order to solve the technical problem, the application provides a folding device. Referring to fig. 1-4 together, the folding device 1 provided in this embodiment includes a base 10, a rotating member 40', a first gear assembly 21, a rotating shaft 20, a first cam member 22, a second cam member 23, and an elastic member 24. The rotating member 40 'rotates to connect the base 10, and the first gear assembly 21 includes a first gear 211 and a second gear 212 coaxially and fixedly disposed, and the first gear 211 is engaged with the rotating member 40'. The rotating shaft 20 is disposed on the base 10, the first cam member 22 is sleeved on the rotating shaft 20, the first cam member 22 includes a first gear portion 221 meshed with the second gear 212, and a cam portion 222 having a first cam surface 2220, and the cam portion 222 is fixed on the first gear portion 221. The second cam member 23 is sleeved on the rotating shaft 20 and can slide relative to the rotating shaft 20, and a side of the second cam member 23, which is close to the first cam member 22, is provided with a second cam surface 2300 which abuts against the first cam surface 2220. The elastic member 24 is sleeved on the rotating shaft 20, one end of the elastic member 24 abuts against one side of the second cam member 23, which is away from the first cam member 22, and the other end of the elastic member can be fixed relative to the rotating shaft 20. When the rotating member 40' rotates relative to the base 10, the first gear assembly 21 rotates relative to the base 10, causing the first cam member 22 to rotate relative to the base 10 and the second cam member 23 to slide along the rotation shaft 20.

The folding device 1 may also be called a hinge or a spindle, and is mainly used for electronic products such as mobile phones, tablet computers, etc., and may also be used for other non-electronic products requiring the torsion spindle 20, such as doors, windows, etc., various mechanical structures, etc. The folding device 1 provided in this embodiment mainly includes the base 10, the rotating member 40', the first gear assembly 21, the rotating shaft 20, the first cam member 22, the second cam member 23, the elastic member 24, and the blocking member 25, which means that the present embodiment can solve the above-mentioned technical problem only by using these components, but in other embodiments, the folding device 1 may also include other components, such as the connecting member 50, the supporting member 60, the synchronizing mechanism, and the like, so as to achieve different purposes. The synchronous mechanism ensures the synchronization of the left and right shell movements in the folding and unfolding processes, realizes the symmetry of the two side movements and the flexible screen 93, and ensures the tight thread joint of the two side flexible screens 93 during folding and the flatness of the flexible screen 93 during unfolding. Next, the base 10, the rotating member 40', the first gear assembly 21, the rotating shaft 20, the first cam member 22, the second cam member 23, the elastic member 24, and the blocking member 25 will be described in detail in this order.

The base 10 is a basic component of the folding device 1, and is mainly used for providing a mounting and fixing foundation for other components, i.e. many components of the folding device 1 can be mounted on the base 10. The base 10 itself is stationary when the folding device 1 moves, mainly the other parts of the folding device 1 perform various movements. The present embodiment is not limited to the shape, structure, material, and other parameters of the base 10, as long as the base can provide a mounting base for other components.

Optionally, the base 10 has a top surface 101, a bottom surface 100, and side surfaces connected between the top surface 101 and the bottom surface 100 in a bending manner. When the folding apparatus 1 is subsequently applied to an electronic device, the top surface 101 is close to the flexible screen of the electronic device, the bottom surface 100 is far away from the flexible screen, and the bottom surface 100 can also be matched with a decoration, so that the base 10 is shielded by the decoration. In other words, the upper surface of the base 10 is the top surface 101, and the lower surface is the bottom surface 100. Further alternatively, both the top surface 101 and the bottom surface 100 are planar, facilitating subsequent mating with other components. The side is the cambered surface that the protrusion set up, not only can improve the outward appearance effect of base 10, still be convenient for cooperate with the decoration.

The rotating member 40 'mainly plays a role in rotating in the folding device 1, so that the folding device 1 has folding and unfolding capabilities, and other components are driven and limited to move by the rotation of the rotating member 40', so that the other components move according to a preset track. One end of the rotating member 40' is rotatably connected to the base 10 such that the rotating member 40' can rotate relative to the base 10, and the other end of the rotating member 40' can be subsequently connected to other components such as a connecting member. The present embodiment is not limited to the shape, structure, material, and other parameters of the rotating member 40', as long as the connection base 10 can be rotated.

The rotation of the rotating member 40' enables the folding device 1 to have a plurality of different states, such as an unfolding state and a folding state, wherein the unfolding state can be understood as a state when the rotating member 40' is completely unfolded, and at this time, the other end of the rotating member 40' is disposed corresponding to the side surface of the base 10, so that the upper surface of the subsequent supporting member is horizontally disposed, and the flexible screen is completely unfolded. The folded state may be understood as a state when the rotating member 40 'is completely folded, and at this time, the other end of the rotating member 40' is disposed corresponding to the top surface 101 of the base 10, so that the opposite ends of the following flexible screen are close to each other, and the flexible screen reaches the completely folded state. And the process of the rotating member 40 'from the unfolded state to the folded state can be understood as the folding process of the folding device 1, and the process of the rotating member 40' from the folded state to the unfolded state can be understood as the unfolding process of the folding device 1.

The rotating shaft 20, the first cam member 22, the second cam member 23, and the elastic member 24 may be referred to as a torsion mechanism, which implements a damping effect during the movement of the folding device 1, and ensures a feel during the unfolding and combining of the product. In addition, enough torsion can realize hovering in the product motion process, and more playability and use scenes are given to the product. The first cam member 22, the second cam member 23, and the elastic member 24 are sequentially sleeved on the rotating shaft 20, in other words, sequentially include the first cam member 22, the second cam member 23, and the elastic member 24 along the axial direction of the rotating shaft 20. Wherein the first cam member 22 includes a cam portion 222, the cam portion 222 has a first cam surface 2220, the side of the second cam member 23 facing the cam portion 222 has a second cam surface 2300 engaged therewith, the first cam surface 2220 and the second cam surface 2300 abut each other such that the first cam member 22 and the second cam member 23 are engaged with each other, and the second cam member 23 is slidable relative to the rotary shaft 20. The elastic member 24 is sleeved on the rotating shaft 20, and one end of the elastic member 24 abuts against one side of the second cam member 23, which is away from the first cam member 22, so that one end of the elastic member 24 is affected by the second cam member 23, and when the second cam member 23 slides, the elastic member 24 is driven to compress or recover. The other end of the elastic member 24 can be fixed relative to the rotating shaft 20, that is, the other end of the elastic member 24 is fixed relative to the rotating shaft 20, the other end of the elastic member 24 cannot slide, only one end of the elastic member 24 can slide, and therefore the elastic member 24 is wholly compressed or restored.

Alternatively, the resilient member 24 may already be in a compressed state when the folding device 1 is in an expanded state, providing a certain pre-compression force to bring the first cam surface 2220 into close contact with the second cam surface 2300.

When the folding device 1 moves, the cam portion 222 rotates relative to the second cam member 23 when the first cam member 22 rotates, so that the second cam member 23 slides in a direction away from the first cam member 22, at this time, the other end of the elastic member 24 is kept stationary, and one end of the elastic member 24 is driven by the second cam member 23 to continuously slide in a direction close to the other end of the elastic member 24, so that the overall length of the elastic member 24 is continuously shortened, and the elastic member 24 is continuously compressed. The elastic member 24 in a compressed state gives the second cam member 23 a repulsive force that increases the positive pressure between the second cam surface 2300 and the first cam surface 2220, thereby increasing the frictional force. The increase in friction increases the torque of the cam portion 222 of the first cam member 22, and the torque of the cam portion 222 of the first cam member 22 may be referred to as a first torque.

In the related art, the cam portion 222 of the first cam member 22 is directly disposed on the rotating member 40', so that the first torque of the cam portion 222 can be directly transmitted to the rotating member 40', so that the torque of the rotating member 40' is also the first torque, in other words, the cam portion 222 and the rotating member 40' are integrated, so that the torque is transmitted 1:1, and the torque of the rotating member 40' is the overall torque of the folding device 1. In other words, the torque of the rotating member 40 'is the torque of the first cam member 22, and the torque of the rotating member 40' is equal to the torque of the first cam member 22. If the torque force of the first cam member 22 remains unchanged, the torque force of the rotating member 40' is always constant, and cannot be adjusted, so that the folding device 1 cannot be applied to various situations.

However, in the present embodiment, the rotating member 40 'is separated from the cam portion 222, that is, the rotating member 40' and the cam portion 222 are not fixedly disposed together, so that the cam portion 222 and the first gear portion 221 are fixedly connected to each other to form the first cam member 22, and the first gear assembly 21 formed by combining the first gear 211 and the second gear 212 which are coaxially and fixedly disposed is added, that is, the rotation axes of the first gear 211 and the second gear 212 are the same, and the first gear 211 and the second gear 212 are fixed on the same shaft so that the first gear 211 and the second gear 212 can synchronously rotate. With the first gear 211 meshed with the rotating member 40', the second gear 212 meshed with the first gear portion 221 enables the first gear 211 and the rotating member 40' to rotate relative to each other, and the second gear 212 and the first gear portion 221 to rotate relative to each other. It will also be appreciated from the foregoing that the present embodiment separates the rotating member 40 'and the cam portion 222, which are originally integrally provided, and uses the first gear assembly 21 as an intermediate medium to achieve force transmission between the rotating member 40' and the first cam member 22.

When the rotating member 40 'rotates relative to the base 10, the rotating member 40' drives the first gear 211 to rotate synchronously, the first gear 211 drives the coaxial second gear 212 to rotate synchronously, the second gear 212 drives the first gear 221 to rotate synchronously, and finally the cam 222 fixed on the first gear 221 rotates, so as to form a first torque force in cooperation with the second cam 23, the rotating shaft 20, the elastic member 24 and the blocking member 25. The torque of the cam portion 222 can be finally transmitted to the rotating member 40' through the first gear portion 221, the second gear 212, and the first gear 211, so that the rotating member 40' has a corresponding torque, for example, the torque of the rotating member 40' is the second torque.

In summary, in the present embodiment, the first gear 221, the second gear 212, the first gear 211, and the rotating member 40 'cooperate with each other to make the rotating member 40' have the second torque finally. The first torque force can be equal to the second torque force, the first torque force can be larger than the second torque force, and the first torque force can be smaller than the second torque force, so that the size of the second torque force can be changed by adjusting the first gear part 221, the second gear 212, the first gear 211 and the rotating piece 40' according to different requirements and different scenes in practical application, and the purpose of adjusting the torque force is achieved.

For example, when the second torque is greater than the first torque, that is, the torque of the rotating member 40 'is amplified, that is, the present embodiment provides a structure that adopts a multi-stage gear to amplify the torque, and the first torque of the cam portion 222 is amplified by the gears and transmitted to the rotating member 40', so that the conventional manner that the rotating member 40 'directly receives the torque of the cam portion 222 during the movement is changed into a manner that the torque is amplified by a plurality of gears, so that the second torque of the rotating member 40' is greater than the first torque of the first cam member 22, and therefore, the torque of the rotating member 40 'in the present application can be greater than the torque of the rotating member 40' in the related art, that is, the second torque is greater than the first torque, thereby increasing the torque and improving the opening and closing feeling. The increase in torsion force not only allows the folding device 1 to be miniaturized, i.e., the first cam member 22, the second cam member 23, the elastic member 24, etc. can still maintain a sufficient torsion force after the sizes of the components become small. And the elastic force of the elastic piece 24 can be reduced on the premise of meeting the required torsion force, so that the abrasion degree of the first cam piece 22 and the second cam piece 23 is reduced, and the service life of parts is prolonged. In other embodiments, the first torque is equal to the second torque, and the first torque is greater than the second torque, which should also belong to the protection scope of the present application, and the description of this embodiment is omitted herein.

In order to achieve the other end of the elastic member 24 fixed with respect to the rotation shaft 20, various specific embodiments are provided herein. In one embodiment, the folding device 1 may further comprise a blocking member 25 in addition to the above-mentioned components, wherein the blocking member 25 is fixed on the rotating shaft 20 on the side of the elastic member 24 facing away from the second cam member 23, and the other end of the elastic member 24 abuts against the blocking member 25. The blocking member 25 may be fixed to the rotating shaft 20 by various methods (such as adhesion, welding, snap connection, etc.), that is, the blocking member 25 cannot move relative to the rotating shaft 20, the elastic member 24 is disposed between the second cam member 23 and the blocking member 25, and opposite ends of the elastic member 24 respectively abut against the second cam member 23 and the blocking member 25, so that the other end of the elastic member 24 is indirectly fixed relative to the rotating shaft 20 through the blocking member 25.

In another embodiment, the opposite ends of the rotating shaft 20 may be disposed on the base 10, and the other end of the elastic member 24 may abut against the base 10. Since the base 10 is fixed when the folding device 1 moves, the elastic member 24 and the rotating shaft 20 can also be fixed relative to the base 10, so that the other end of the elastic member 24 and the rotating shaft 20 are indirectly fixed relative to each other by using the base 10.

In yet another embodiment, the other end of the elastic member 24 can be directly fixed to the rotating shaft 20 by various methods (such as bonding, welding, screwing, clamping, etc.), such that the other end of the elastic member 24 is directly fixed relative to the rotating shaft 20. In this embodiment, only the blocking member 25 is added to fix the other end of the elastic member 24 relative to the rotating shaft 20, and other embodiments are also included in the scope of the present application.

Alternatively, the first gear assembly 21 includes a first shaft 210, a first gear 211 and a second gear 212 fixed to the first shaft 210, and the first gear 211 and the second gear 212 are disposed along an axial direction of the first shaft 210. Further alternatively, the first shaft 210, the first gear 211, and the second gear 212 may be of a unitary structure or a split structure. Further alternatively, one end of the first shaft 210 may be provided to the base 10, and the other end may be provided to the stopper 25, enabling the installation of the first gear assembly 21.

Alternatively, the first rotor 30 may be provided with a plurality of teeth 4410 in the circumferential direction, with the plurality of teeth 4410 being utilized to mesh with the first gear 211. Alternatively, the first gear part 221 and the cam part 222 may be of a unitary structure or a split structure.

Alternatively, the rotating shaft 20 may be inserted into the base 10, and the rotating shaft 20 may rotate relative to the base 10, or the rotating shaft 20 may be fixed on the rotating shaft 20. Alternatively, the rotating member 40' may be sleeved on the rotating shaft 20 and can rotate relative to the rotating shaft 20, so as to realize that the rotating member 40' rotates to connect with the base 10, and at this time, the rotating member 40', the first cam member 22, the second cam member 23, the elastic member 24, and the blocking member 25 are all sleeved on the rotating shaft 20, which can simplify the structure of the folding device 1. Alternatively, the rotating member 40 'may be separately rotatably coupled to the base 10, so long as the rotating member 40' can be engaged with the first gear 211.

Alternatively, the second cam member 23 can slide relative to the rotating shaft 20 in a variety of ways, for example, in an embodiment, the cross section of the rotating shaft 20 sleeved on the second cam member 23 is non-circular, and the hole of the second cam member 23 is correspondingly non-circular, so that the second cam member 23 cannot rotate relative to the rotating shaft 20 and can only slide relative to the rotating shaft 20. In another embodiment, the rotating section is circular, but the second cam member 23 is sleeved with two rotating shafts 20 at the same time, so that the second cam member 23 cannot rotate relative to the rotating shafts 20 and can only slide relative to the rotating shafts 20.

Optionally, the blocking member 25 includes a blocking portion 251, a spacer 252, and a fastening portion 253, where the blocking portion 251 abuts against the other end of the elastic member 24, and is used for setting the first gear assembly 21, the fastening portion 253 is fastened to the rotating shaft 20, and the spacer 252 abuts between the blocking portion 251 and the fastening portion 253, so as to improve friction force and further improve torsion force.

In the present embodiment, the first gear portion 221 has a first number of teeth T1, the second gear 212 has a second number of teeth T2, the first gear 211 has a third number of teeth T3, and one turn of the rotating member 40' in the circumferential direction can have a fourth number of teeth T4, (T2/T1) × (T4/T3) >1.

Each gear structure is provided with a plurality of teeth along one circle of the circumference, namely 360 degrees along the circumference, and two adjacent gears mutually rotate through tooth-to-tooth meshing. Specifically, the numbers of teeth of the first gear portion 221, the second gear 212, and the first gear 211 are the first number of teeth T1, the second number of teeth T2, and the third number of teeth T3, respectively. While a circumferential turn of the rotary member 40 'may have a fourth number of teeth T4, in other words, if teeth are provided in the circumferential turn of the rotary member 40', the fourth number of teeth may be provided. However, the rotating member 40' is not a gear, but takes on other functions, and the maximum rotation angle of one direction during the movement of the rotating member 40' is 90 °, so that the teeth are not provided in one circle in the circumferential direction of the rotating member 40' but a plurality of teeth are provided in part of the circumferential direction in the present embodiment. For example, a plurality of teeth may be provided in the range of 90 ° -120 ° in the circumferential direction of the rotary member 40', the number of teeth of the plurality of teeth being smaller than the fourth number of teeth.

The quotient of the second tooth number of the second gear 212 and the first tooth number of the first gear 221 is a multiple by which the second gear 212 can enlarge or reduce the torque force of the first gear 221. Since the second gear 212 is disposed coaxially with the first gear 211, the torque force of the first gear 211 is equal to the torque force of the second gear 212. Similarly, the quotient of the fourth tooth number of the rotating member 40 'and the third tooth number of the first gear 211 is a multiple that the rotating member 40' can enlarge or reduce the torque force of the first gear 211.

In summary, the present embodiment realizes the expansion and contraction of the torque force by the gear shifting principle of the two sets of gears, and finally obtains the expansion or contraction of the torque force of the rotating member 40', i.e., (T2/T1) × (T4/T3). By making (T2/T1) × (T4/T3) >1, the torque force of the rotating member 40 'can be made larger than the torque force of the cam portion 222, i.e., the torque force of the rotating member 40' is amplified, thereby achieving the purpose of torque amplification.

In addition, in order to make (T2/T1) × (T4/T3) >1, there may be various implementations. In one embodiment, T2/T1>1 may be enabled, i.e., the second gear 212 is capable of amplifying the torque of the first gear portion 221. At this time, T4/T3 is not less than 1, i.e. the rotating member 40' can amplify or not change the torque force of the first gear 211, and the torque force can be amplified finally through two steps of amplification. It is of course also possible when T4/T3<1, i.e. when the rotor 40' is able to reduce the torque of the first gear 211, as long as it is ensured that the final torque is amplified.

Specifically, referring to fig. 5-6 together, in the present embodiment, T2/t1=2, that is, the number of teeth of the second gear 212 is 2 times that of the first gear 221, and the second gear 212 can amplify the torque force of the first gear 221 by 2 times. T4/t3=1, the number of teeth of one turn of the rotating member 40 'can be equal to the number of teeth of the first gear 211, that is, the rotating member 40' can maintain the torque force of the first gear 211 unchanged. Finally, the torque of the rotating piece 40' can be amplified by 2 times under the condition of realizing the cam and the elastic piece 24 of the same gear, and can be transmitted to the shell and the whole machine subsequently. The user can also adjust the torque magnification of the final rotating member 40' according to the actual situation.

Similarly, in another embodiment, T2/T1<1, i.e. the second gear 212 can reduce the torque of the first gear 221. At this time, T4/T3>1, that is, the rotating member 40' can amplify the torque force of the first gear 211 and amplify the final torque force. It is noted that since the parameters of each tooth of the two gears meshed with each other are the same, the larger the number of teeth, the larger the radius thereof, in other words, the larger the number of teeth, the larger the gear may be called a large gear, and the smaller the number of teeth may be called a small gear.

Referring to fig. 7-10 together, in the present embodiment, the rotating member 40' includes a second gear portion 44 and a rotating portion 45 connected to each other, the second gear portion 44 includes a first portion 441 and a second portion 442 along a circumferential direction, and a plurality of teeth 4410 are provided on a circumferential side surface of the first portion 441 for meshing with the first gear 211. The second portion 442 is matched with the limiting groove 4420 through the limiting part 11, the second portion 442 is provided with the limiting groove 4420, and the base 10 is provided with the limiting part 11. The limiting portion 11 abuts against the groove wall on one side of the limiting groove 4420 when the folding device 1 is in the unfolded state, and the limiting portion 11 abuts against the groove wall on the other side of the limiting groove 4420 when the folding device 1 is in the folded state.

The rotary member 40' includes a second gear portion 44 and a rotary portion 45, wherein the second gear portion 44 is a member in which teeth 4410 are provided in part of the circumferential direction, for meshing with the first gear 211. The rotating portion 45 is adapted to cooperate with other components, such as a connector, a support, etc. In addition, the second gear 212 may be circumferentially divided into a first portion 441 and a second portion 442, wherein the first portion 441 is a portion where the plurality of teeth 4410 are disposed. Alternatively the first portion 441 has an angle in the circumferential direction of 90 ° -120 °. The second portion 442 cooperates with the base 10 to limit the rotation member 40', for example, the second portion 442 cooperates with the base 10 through the limiting portion 11 and the limiting groove 4420, when the limiting portion 11 is disposed on the second portion 442, the limiting groove 4420 is disposed on the base 10, and when the limiting groove 4420 is disposed on the second portion 442, the limiting portion 11 is disposed on the base 10, and in this embodiment, only the limiting groove 4420 is disposed on the second portion 442 and the limiting portion 11 is disposed on the base 10 for schematic illustration.

Specifically, a limiting groove 4420 is formed on a side of the second portion 442 facing the base 10, and a limiting portion 11 is protruding on a side of the base 10 facing the second portion 442, where the limiting portion 11 is disposed in the limiting groove 4420. When the folding device 1 is in the unfolded state, the limiting part 11 abuts against the groove wall on one side of the limiting groove 4420, so that the rotating piece 40' is prevented from rotating continuously. When the folding device 1 is in the folded state, the limiting part 11 abuts against the groove wall at the other side of the limiting groove 4420, so that the rotating piece 40' is prevented from rotating reversely and continuously. In summary, the present embodiment can utilize the limiting portion 11 and the limiting groove 4420 to limit the position of the rotating member 40' in the unfolded state and the folded state.

Alternatively, the base 10 and the limiting portion 11 may be integrally formed, or may be separately formed. When the base 10 and the limiting portion 11 are integrally formed, the base 10 and the limiting portion 11 are manufactured by one process, but different areas are named differently for convenience of distinction. When the base 10 and the limiting portion 11 are of a split structure, the base 10 and the limiting portion 11 are manufactured through different processes, and then the base 10 and the limiting portion 11 are connected together through various methods. The present embodiment is schematically described with respect to a structure in which the base 10 and the stopper 11 are integrated, but it is needless to say that, in other embodiments, the base 10 and the stopper 11 are separate structures and are also intended to fall within the scope of the present application.

Referring to fig. 11-12 together, in the present embodiment, the folding device 1 further includes a rotating member 30 'rotatably connected to the base 10, and a second gear assembly 26 meshed with the rotating member 30' and the first gear assembly 21, and the rotating member 40', the first gear assembly 21, the second gear assembly 26, and the rotating member 30' cooperate with each other to enable the rotating member 40 'and the rotating member 30' to reversely rotate in synchronization with each other.

In addition to the rotating member 40', the folding device 1 may further comprise a rotating member 30' and a second gear assembly 26, the rotating member 30 'being rotatably connected to the base 10, i.e. the rotating member 30' is also rotatable relative to the base 10. Alternatively, the rotating member 30 'and the rotating member 40' are disposed on two sides of the base 10, respectively, and the rotating member 30 'and the rotating member 40' may be connected with a connecting member, a supporting member, or the like. The second gear assembly 26 is also a component of gears, the second gear assembly 26 being in engagement with the rotating member 30' and the first gear assembly 21 such that the second gear assembly 26 is capable of engaging the first gear assembly 21 with respect to the rotating member 30', i.e., the second gear assembly 26 rotatably connects the rotating member 30' with the first gear assembly 21. Alternatively, the rotating member 40', the first gear assembly 21, the second gear assembly 26, and the rotating member 30' may be arranged in a row, simplifying the structure, and reducing the thickness of the folding apparatus 1.

When the rotating member 40 'rotates along the first direction, the first gear assembly 21 can be driven to synchronously rotate along a second direction opposite to the first direction, the first gear assembly 21 can drive the second gear assembly 26 to synchronously rotate along the first direction, the second gear assembly 26 can drive the rotating member 30' to synchronously rotate along the second direction, and finally, the rotating member 40 'and the rotating member 30' can synchronously reversely rotate with each other through the mutual cooperation of the rotating member 40', the first gear assembly 21, the second gear assembly 26 and the rotating member 30', so that the left and right synchronization of the folding device 1 is realized.

In the present embodiment, the number of teeth that can be provided on one circumferential turn of the rotor 40 'is equal to the number of teeth that can be provided on one circumferential turn of the rotor 30'. The rotary member 30 'is identical to the rotary member 40', and one turn of the rotary member 30 'in the circumferential direction may have the seventh tooth number T7, in other words, the seventh tooth number of teeth 4410 may be provided if the teeth 4410 are provided in each turn of the rotary member 30' in the circumferential direction. However, the rotator 30' is not a gear, but takes other roles, and the maximum rotation angle of one direction during the movement of the rotator 30' is 90 °, so that the teeth 4410 are not provided at all circles of the rotator 30' in the circumferential direction, but a plurality of teeth 4410 are provided at part of the circumferential direction in this embodiment. For example, the plurality of teeth 4410 may be provided in the range of 90 ° -120 ° in the circumferential direction of the rotary member 30', and the number of teeth 4410 is smaller than the seventh number of teeth.

The seventh tooth number of the rotating member 30 'and the fourth tooth number of the rotating member 40' can be equal in this embodiment, that is, t7=t4, so that the rotation angle of the rotating member 40 'and the rotating member 30' is the same on the basis that the rotating member 40 'and the rotating member 30' synchronously and reversely rotate. The number of teeth of the first gear assembly 21 and the second gear assembly 26 is not limited in this embodiment. For example, the second gear assembly 26 includes a third gear 261, where the third gear 261 meshes with the first gear 211 and the rotating member 30', respectively, and the third gear 261 has a sixth tooth number T6, the first gear 211 has a third tooth number T3, and the sixth tooth number and the third tooth number may be any numbers, which do not affect the angle of synchronous rotation of the rotating member 40' with the rotation. In the present embodiment, only the third tooth number T3, the fourth tooth number, the sixth tooth number, and the seventh tooth number are equal, that is, t3=t4=t6=t7.

Referring to fig. 11 and 13 together, in the present embodiment, the number of the rotating shafts 20, the second cam members 23, and the elastic members 24 is two, and each rotating shaft 20 is respectively sleeved with one second cam member 23 and one elastic member 24. The first cam member 22 is sleeved on one rotating shaft 20 and matched with one second cam member 23, the rotating member 30' is sleeved on the other rotating shaft 20, the rotating member 30' is provided with a cam portion 222 matched with the other second cam member 23, the second gear assembly 26 comprises a third gear 261, and the third gear 261 is meshed with the first gear 211 and the rotating member 30', respectively.

The number of the rotating shafts 20, the second cam members 23 and the elastic members 24 is two, and each rotating shaft 20 is respectively sleeved with one second cam member 23 and one elastic member 24. In other words, one rotating shaft 20, one second cam member 23, and one elastic member 24 may form one assembly, and this embodiment may employ two assemblies, where the first cam member 22 may be sleeved on the rotating shaft 20 in one assembly and cooperate with the corresponding second cam member 23. The rotating member 30' is sleeved on the rotating shaft 20 of the other component, and the rotating member 30' may further be provided with a cam portion 222 identical to the cam portion 222 of the first cam member 22, where the cam portion 222 is used to cooperate with the other second cam member 23, so that the rotating member 30' also has a torsion force. Since the cam portion 222 is directly disposed on the rotating member 30', the torque force received by the cam portion 222 is the torque force received by the rotating member 30', and thus the torque force received by the rotating member 30' is the first torque force. In addition, each assembly may further include a blocking member 25, where each shaft 20 is sleeved with a second cam member 23, an elastic member 24, and fixed to the blocking member 25.

In addition, the second gear assembly 26 may include a second shaft 260 and a third gear 261 fixed on the second shaft 260, and the second shaft 260 may be disposed on the base 10 and the blocking member 25, and the third gear 261 cooperates with the first gear 211 to realize synchronous counter rotation of the rotating member 30 'and the rotating member 40'. In addition, since the rotating members 30 'and the rotating members 40' on the left and right sides are synchronized together, the torque of the whole folding device 1 is the sum of the torque of the rotating member 30 'and the torque of the rotating member 40', that is, the sum of the first torque and the second torque is the whole folding device 1. Alternatively, two stops 251 may be connected to each other to provide a mounting basis for the first gear assembly 21 and the second gear assembly 26.

Referring to fig. 14-17, in the present embodiment, the number of the rotating shafts 20, the first cam members 22, the second cam members 23, and the elastic members 24 is two, and each rotating shaft 20 is respectively sleeved with one first cam member 22, one second cam member 23, and one elastic member 24. The second gear assembly 26 includes a third gear 261 and a fourth gear 262 coaxially disposed, the third gear 261 being engaged with the first gear 211 and the rotary member 30', respectively, the fourth gear 262 being engaged with the first gear portion 221 of one of the first cam members 22, the first gear portion 221 having a first number of teeth T1, the fourth gear 262 having a fifth number of teeth T5, the third gear 261 having a sixth number of teeth T6, a circumferential turn of the rotary member 30' being capable of having a seventh number of teeth T7, (T5/T1), (T7/T6) >1. In addition, each rotating shaft 20 may further include a blocking member 25, where each rotating shaft 20 may be sleeved with a first cam member 22, a second cam member 23, an elastic member 24, and fix one blocking member 25.

In another embodiment, the rotating member 30' on the other side may be separated from the cam portion 222, so that the cam portion 222 and the first gear portion 221 form a first cam member 22, and the first cam member 22 is sleeved on the rotating shaft 20 in the other component, so that the left and right sides form a symmetrical structure. The second gear assembly 26 includes a third gear 261 and a fourth gear 262 coaxially disposed, in other words, the rotation axes of the third gear 261 and the fourth gear 262 are the same, and the third gear 261 and the fourth gear 262 are fixed to the second shaft 260 such that the third gear 261 and the fourth gear 262 can rotate synchronously. With the third gear 261 engaged with the first gear 211 and the rotary member 30', respectively, the fourth gear 262 is engaged with the first gear portion 221 of the first cam member 22 such that the third gear 261 can rotate relative to the first gear 211 and the rotary member 30', and the fourth gear 262 can rotate relative to the first gear portion 221. It will also be appreciated that this embodiment separates the originally integrally provided rotating member 30 'from the cam portion 222, and utilizes the second gear assembly 26 as an intermediate medium to effect transmission of force between the rotating member 40' and the first cam member 22.

When the rotating member 30' rotates relative to the base 10, the third gear 261, the fourth gear 262, the first gear 221 and the cam 222 are sequentially driven to rotate synchronously, so as to form a first torque force in cooperation with the second cam 23, the rotating shaft 20, the elastic member 24 and the blocking member 25. The torque of the cam portion 222 can be finally transmitted to the rotating member 30' through the first gear portion 221, the second gear 212, and the first gear 211, so that the rotating member 30' has a corresponding torque, for example, the torque of the rotating member 30' is the third torque.

In summary, the torque of the rotating member 30 'can be amplified by the first gear 221, the third gear 261, the fourth gear 262, and the rotating member 30' in the present embodiment, that is, the present embodiment provides a structure that adopts a multi-stage gear to amplify the torque, wherein the first torque of the cam portion 222 is amplified by the gears and transmitted to the rotating member 30', so that the torque of the rotating member 30' can be amplified by a plurality of gears instead of the conventional manner that the rotating member 30 'directly receives the torque of the cam portion 222 during the movement, and the torque of the rotating member 30' can be greater than the first torque of the first cam member 22. The increase in torsion force not only allows the folding device 1 to be miniaturized, i.e., the first cam member 22, the second cam member 23, the elastic member 24, etc. can still maintain a sufficient torsion force after the sizes of the components become small. And the elastic force of the elastic piece 24 can be reduced on the premise of meeting the required torsion force, so that the abrasion degree of the first cam piece 22 and the second cam piece 23 is reduced, and the service life of parts is prolonged.

Specifically, the numbers of teeth of the first gear portion 221, the fourth gear 262, and the third gear 261 are the first number of teeth T1, the fifth number of teeth T5, and the sixth number of teeth T6, respectively. While the circumferential one turn of the rotary member 30 'may have the seventh number of teeth T7, in other words, the seventh number of teeth 4410 may be provided if the teeth 4410 are provided in the circumferential one turn of the rotary member 30'. However, the rotator 30' is not a gear, but takes other roles, and the maximum rotation angle of one direction during the movement of the rotator 30' is 90 °, so that the teeth 4410 are not provided at all circles of the rotator 30' in the circumferential direction, but a plurality of teeth 4410 are provided at part of the circumferential direction in this embodiment. For example, the plurality of teeth 4410 may be provided in the range of 90 ° -120 ° in the circumferential direction of the rotary member 30', and the number of teeth 4410 is smaller than the seventh number of teeth.

The quotient of the fifth tooth number of the fourth gear 262 and the first tooth number of the first gear 221 is a multiple by which the fourth gear 262 can enlarge or reduce the torque force of the first gear 221. Since the fourth gear 262 is disposed coaxially with the third gear 261, the torsion force of the fourth gear 262 is equal to the torsion force of the third gear 261. Similarly, the quotient of the seventh tooth number of the rotating member 30 'and the sixth tooth number of the third gear 261 is a multiple by which the rotating member 30' can enlarge or reduce the torque force of the third gear 261.

In summary, the present embodiment realizes the expansion and contraction of the torque force by the gear shifting principle of the two sets of gears, and finally obtains the expansion or contraction of the torque force of the rotating member 30', i.e., (T5/T1) × (T7/T6). By making (T5/T1) × (T7/T6) >1, the torque force of the rotary member 30 'can be made larger than that of the cam portion 222, i.e., the torque force of the rotary member 30' is amplified, thereby achieving the purpose of torque amplification.

In addition, in order to make (T5/T1) × (T7/T6) >1, there may be various implementations. In one embodiment, T5/T1>1, i.e., the fourth gear 262, may be enabled to amplify the torque force of the first gear portion 221. At this time, T7/T6 is not less than 1, i.e. the rotating member 30' can amplify or not change the torque force of the third gear 261, and the torque force can be amplified finally through two-step amplification. It is of course also possible when T7/T6<1, i.e. when the rotary member 30' is able to reduce the torque of the third gear 261, as long as it is ensured that the final torque is amplified.

Specifically, t5/t1=2, that is, the number of teeth of the fourth gear 262 is 2 times that of the first gear 221, and the fourth gear 262 can amplify the torsion force of the first gear 221 by 2 times. T7/t6=1, the number of teeth of the rotating member 30 'can be equal to the number of teeth of the third gear 261, i.e., the rotating member 30' can maintain the torque of the third gear 261 unchanged. Finally, the torque of the rotating piece 30' can be amplified by 2 times under the condition of realizing the cam and the elastic piece 24 of the same gear, and can be transmitted to the shell and the whole machine subsequently. The user can also adjust the torque magnification of the final rotating member 30' according to the actual situation.

Similarly, in another embodiment, T5/T1<1, i.e. the fourth gear 262 can reduce the torque of the first gear 221. In this case, T7/T6>1, that is, the rotary member 30' can amplify the torque of the third gear 261 and amplify the final torque.

In the present embodiment, the second gear 212 has a second tooth number T2, the first gear 211 has a third tooth number T3, and one round of the rotating member 40' in the circumferential direction can have a fourth tooth number T4, (T2/T1) = (T4/T3) = (T5/T1) = (T7/T6). By making (T2/T1) = (T4/T3) = (T5/T1) = (T7/T6), the second torsion of the rotating member 40 'and the third torsion of the rotating member 30' can be equal, so that the torsion on the left and right sides of the folding device 1 is equal, the torsion symmetry is realized, and the uneven stress is avoided, thereby increasing the abrasion of the components.

Referring to fig. 14-15 again, in the present embodiment, the second gear 212 and the fourth gear 262 are arranged along the axial direction of the rotating shaft 20, and the orthographic projection portions of the second gear 212 and the fourth gear 262 along the axial direction of the rotating shaft 20 are overlapped.

As can be seen from the above, in order to enlarge the torque between the rotating element 40 'and the rotating element 30' on the left and right sides, the number of teeth between the second gear 212 and the fourth gear 262 can be increased, which corresponds to increasing the radius of the second gear 212 and the fourth gear 262, and making the radius of the second gear 212 and the fourth gear 262 larger. Therefore, in the present embodiment, the second gear 212 and the fourth gear 262 are arranged along the axial direction of the rotation shaft 20, instead of being arranged side by side like the rotation member 40', the first gear 211, the third gear 261, and the rotation member 30'. While the second gear 212 and the fourth gear 262 are made to have a partial overlap in the axial direction, that is, the orthographic projection of the second gear 212 in the axial direction of the rotation shaft 20 overlaps with the orthographic projection of the fourth gear 262 in the axial direction of the rotation shaft 20. This makes the first gear assembly 21 and the second gear assembly 26 more compact, thereby reducing the overall width of the folding device 1 and further achieving miniaturization of the folding device 1.

Referring to fig. 18-23, the folding device 1 provided in this embodiment further includes two first rotating members 30, two second rotating members 40, two connecting members 50, and two supporting members 60. The two first rotating members 30 are respectively rotatably connected to opposite sides of the base 10, and the two second rotating members 40 are respectively rotatably connected to opposite sides of the base 10. One of the first rotating member 30 and the second rotating member 40 on the same side of the base 10 is rotatably connected to the connecting member 50, and the other is slidably connected to the connecting member 50. Each support 60 is rotatably connected to one of the link members 50 and slidably and rotatably connects the other of the first rotary member 30 and the second rotary member 40. The rotating member 40' is at least one of the first rotating member 30 and the second rotating member 40.

The first rotating member 30, the second rotating member 40, and the connecting member 50 in the folding device 1 may be collectively referred to as a track mechanism 1b, where the track mechanism 1b is mainly used to control the movement track of the supporting member 60, so as to control the cross-sectional shape of the flexible screen in the folded state, and ensure that the flexible screen is better supported without damaging the respective layer structures in the flexible screen. Next, the first rotating member 30, the second rotating member 40, the connecting member 50, and the supporting member 60 will be described in detail in this embodiment.

The two first rotating members 30 perform a folding function in the folding device 1 mainly by their rotating ability, and the components connected to the two first rotating members 30 are driven and limited by the rotation of the two first rotating members 30, so that the components move according to a predetermined movement track. The two first rotating members 30 are rotatably connected to the base 10, that is, the two first rotating members 30 can rotate relative to the base 10, that is, one end of the two first rotating members 30 near the base 10 is rotatably connected to the base 10, and since the base 10 is stationary, only the two first rotating members 30 rotate. And the two first rotating members 30 are respectively disposed at opposite sides of the base 10, the opposite sides of the base 10 mentioned in this embodiment refer to opposite sides along the width direction of the base 10, and the width direction can be understood as the arrangement direction of the two first rotating members 30. The same will be understood with respect to this embodiment and the opposite sides below. The two first rotating members 30 are respectively arranged at two opposite sides of the base 10 to control the unfolding and folding of the left and right sides of the folding device 1, thereby controlling the overall unfolding function and folding function of the folding device 1. The present embodiment is not limited to the shape, structure, material, and other parameters of the first rotating member 30, as long as the first rotating member 30 can be rotatably connected to the base 10.

Alternatively, two first rotating members 30 are rotatably coupled to the side surfaces of the base 10. Further alternatively, in an embodiment the two first rotating members 30 are arranged axisymmetrically with respect to the base 10. In another embodiment, the two first rotating members 30 are disposed in a non-axisymmetric manner with respect to the base 10, and it is also understood that the two first rotating members 30 have a partially overlapping region in the longitudinal direction of the folding device 1, and this embodiment is schematically illustrated with only the two first rotating members 30 disposed in an axisymmetric manner with respect to the base 10.

The second rotating members 40 have the same function as the first rotating members 30, and the folding function is realized mainly by the capability of rotating the same in the folding device 1, and the components connected with the two second rotating members 40 are driven and limited by the rotation of the two second rotating members 40, so that the components move according to a predetermined movement track. The two second rotating members 40 are rotatably connected to the base 10, that is, the two second rotating members 40 can rotate relative to the base 10, in other words, one end of the two second rotating members 40 near the base 10 is rotatably connected to the base 10, and since the base 10 is stationary, only the two second rotating members 40 rotate. And the two second rotating members 40 are respectively disposed on two opposite sides of the base 10, the two opposite sides of the base 10 refer to two opposite sides along the width direction of the base 10, and the width direction can be understood as the arrangement direction of the two second rotating members 40, and the same can be understood in this embodiment and the following two opposite sides. The two second rotating members 40 are respectively arranged at two opposite sides of the base 10 to control the unfolding and folding of the left and right sides of the folding device 1, thereby controlling the overall unfolding function and folding function of the folding device 1. The present embodiment is not limited to the shape, structure, material, and other parameters of the second rotating member 40, as long as the second rotating member 40 can be rotatably connected to the base 10.

Alternatively, the two second rotating members 40 and the two first rotating members 30 are spaced apart along the length direction of the base 10, so that not only the structure of the folding device 1 can be simplified, the folding device 1 can be more compact, but also the second rotating members 40 and the first rotating members 30 can be better connected with the base 10 in a rotating manner.

Alternatively, two second rotating members 40 are rotatably coupled to the side surfaces of the base 10. Alternatively, in one embodiment, the two second rotating members 40 are disposed axisymmetrically with respect to the base 10, and in another embodiment, the two second rotating members 40 are disposed non-axisymmetrically with respect to the base 10, and it is also understood that the two second rotating members 40 have a partially overlapping region in the length direction of the folding apparatus 1. In the present embodiment, only two second rotating members 40 are schematically illustrated as being disposed in axisymmetric relation to the base 10.

The connecting members 50 mainly serve to connect the respective components in the folding device 1, and one of the first rotating member 30 and the second rotating member 40 located at the same side of the base 10 is rotatably connected to one connecting member 50, and the other is slidably connected to one connecting member 50. In one embodiment, the first rotating member 30 may be rotatably connected to the connecting member 50, the second rotating member 40 may be slidably connected to the connecting member 50, and in another embodiment, the second rotating member 40 may be rotatably connected to the connecting member 50, the first rotating member 30 may be slidably connected to the connecting member 50, in this embodiment, only the first rotating member 30 is rotatably connected to one connecting member 50, and the second rotating member 40 is slidably connected to one connecting member 50. The connection relationship of the first rotating member 30, the second rotating member 40, and the connecting member 50 with respect to the other side of the base 10 is the same as the connection relationship of the first rotating member 30, the second rotating member 40, and the connecting member 50 with respect to the one side of the base 10.

The first rotating member 30 is rotatably connected to one connecting member 50, that is, an end of the first rotating member 30 remote from the base 10 is rotatably connected to the connecting member 50, that is, the first rotating member 30 is rotatable relative to the connecting member 50. The second rotating member 40 is slidably connected to a connecting member 50, that is, an end of the second rotating member 40 remote from the base 10 is slidably connected to the connecting member 50, which is also understood to mean that the second rotating member 40 can slide relative to the connecting member 50. In addition, the connecting piece 50 is further used for connecting the housing, so that the connecting piece 50 and the housing are fixed together, and when the housing rotates, the connecting piece 50 can be driven to rotate together. The present embodiment is not limited to the shape, structure, material and other parameters of the connecting member 50, as long as the connecting member 50 can be rotatably connected to one rotating member 40 'and slidably connected to the other rotating member 40'.

The support 60 is mainly used for supporting the flexible screen and assisting the flexible screen to form when the folding device 1 is subsequently applied to an electronic apparatus, so as to control the folding form of the flexible screen, and thus the support 60 may also be called a supporting plate or a tilting plate, and the carrier 70 may also be called a middle plate. The folding device 1 may comprise two sloping plates and one middle plate, in which case the folding device 1 may be referred to as a three-plate structure, or the folding device 1 may comprise two sloping plates and two middle plates, in which case the folding device 1 may be referred to as a four-plate structure. Optionally, the flexible screen may be adhered to the supporting member 60 by means of glue, so that the shape of the flexible screen is more natural during bending, the stress after bending is small, and the damage of the flexible screen is reduced. Each supporting member 60 is disposed on one connecting member 50, specifically, the supporting member 60 is rotatably connected to the connecting member 50, that is, the supporting member 60 can rotate relative to the connecting member 50, and the supporting member 60 slides and rotates to connect the other of the first rotating member 30 and the second rotating member 40, that is, the supporting member 60 can rotate relative to the other of the first rotating member 30 and the second rotating member 40, and the supporting member 60 can also slide relative to the other of the first rotating member 30 and the second rotating member 40. The present embodiment is schematically illustrated with only the support member 60 slidably and rotatably coupled to the second rotary member 40.

The folding device 1 may further include a decoration 80, where the decoration 80 is disposed on the bottom surface 100 and the side surface of the base 10, and is used for protecting and covering other components of the base 10, so that the user cannot observe the inside of the folding device 1. And the decoration 80 can be matched with the shells on the left side and the right side of the base 10 to form the appearance surface of the electronic equipment.

The folding device 1 provided in this embodiment may consider the first rotating member 30, the second rotating member 40, the connecting member 50, and the supporting member 60 on one side of the base 10 as a left module, and the first rotating member 30, the second rotating member 40, the connecting member 50, and the supporting member 60 on the other side of the base 10 as a right module, where the left module and the right module may be symmetrically designed or asymmetrically designed.

The folding device 1 provided in this embodiment can form the base 10, the two first rotating members 30, the two second rotating members 40, and the two connecting members 50 into one track mechanism 1b, wherein the track mechanism 1b ensures that the space 1a in the folded state Rong Bing takes on a U shape or a water drop shape, and ensures that the support of the flexible screen is better achieved without damaging the lamination of the flexible screen. In one embodiment, the folding device 1 comprises a track mechanism 1b, the track mechanism 1b being provided on one side of the support 60. In another embodiment, the folding device 1 includes two track mechanisms 1b, the two track mechanisms 1b are disposed on one side of the support 60, and the two track mechanisms 1b are disposed in an aligned manner along the length extending direction of the support 60. At this time, one supporting member 60 is rotatably coupled to two coupling members 50 while being slidably and rotatably coupled to two second rotating members 40. In other embodiments, the folding device 1 includes three or more track mechanisms 1b, the three or more track mechanisms 1b are provided on one side of the support 60, and the three or more track mechanisms 1b are arranged in a direction extending along the length of the support 60. At this time, one supporting member 60 is rotatably connected to three or more connecting members 50, and simultaneously slidably and rotatably connected to three or more second rotating members 40. The present embodiment is only schematically illustrated with the folding device 1 including three track mechanisms 1b and two supporting members 60, and it is understood that the two track mechanisms 1b and the one track mechanism 1b are also within the scope of the present application.

The above-mentioned rotation is understood to mean that the two parts can be moved circumferentially about the axis of rotation, with only angular changes and no displacement changes. Sliding is understood to mean that the two parts move in parallel, with only a change in displacement and no change in angle. The fact that the two parts are both slidable and rotatable means that both parts have both a change in displacement and an angular change, which sliding and rotation can also be referred to as rolling. The connection between the support member 60 and the second rotating member 40 may also be referred to as rolling connection of the support member 60 to the second rotating member 40.

Based on the above connection, the folding device 1 provided in this embodiment is formed by 6 kinematic pairs on one side, specifically, the first rotating member 30 cooperates with the base 10 to form a revolute pair, the first rotating member 30 cooperates with the connecting member 50 to form a revolute pair, the second rotating member 40 cooperates with the base 10 to form a revolute pair, the second rotating member 40 cooperates with the connecting member 50 to form a sliding pair, the supporting member 60 cooperates with the second rotating member 40 to form a rolling pair, and the supporting member 60 cooperates with the connecting member 50 to form a revolute pair. The total degree of freedom for the co-operation of the single-sided components is 3×4 (4 components on one side, such as 1 first rotating member 30,1 second rotating member 40,1 connecting member 50,1 supporting member 60) -2*5 (5 low pairs on one side, such as 1 sliding pair and 4 rotating pairs) -1*1 (1 high pair on one side, such as 1 rolling pair) =1.

The movement path and movement path of the individual components are thus unique when the folding device 1 is moved. Specifically, when the folding device 1 is folded, the connecting member 50 rotates relative to the base 10, the first rotating member 30 and the second rotating member 40 also rotate relative to the base 10, the second rotating member 40 also slides relative to the connecting member 50, the second rotating member 40 also slides and rotates relative to the supporting member 60, the supporting member 60 also rotates relative to the connecting member 50, and finally the two supporting members 60 are folded relative to each other. When the folding device 1 is unfolded, the connecting piece 50 rotates relative to the base 10, the first rotating piece 30 and the second rotating piece 40 also rotate relative to the base 10, the second rotating piece 40 also slides relative to the connecting piece 50, the second rotating piece 40 also slides and rotates relative to the supporting piece 60, the supporting piece 60 also rotates relative to the connecting piece 50, and finally the two supporting pieces 60 are unfolded mutually.

The above-mentioned movement process of the folding device 1 has various driving and driven logic relationships, and the present application is only exemplified by one specific movement process. When the folding device 1 is folded, that is, when the folding device 1 is in the folded state from the unfolded state to the folded state, in other words, when the two connecting members 50 rotate relative to the base 10 and approach each other, since the first rotating member 30 and the second rotating member 40 both rotate to connect the base 10, the connecting members 50 can drive the first rotating member 30 and the second rotating member 40 to rotate relative to the base 10. And during the rotation of the first rotating member 30 and the second rotating member 40, the second rotating member 40 may also slide relative to the connecting member 50, i.e., the connecting member 50 may slide along the second rotating member 40, thereby changing the distance between the connecting member 50 and the base 10. When the connecting piece 50 slides, the supporting piece 60 is disposed on the connecting piece 50, so that the connecting piece 50 can drive the supporting piece 60 to slide together. When the supporting member 60 slides, the second rotating member 40 can also slide and rotate relative to the supporting member 60, so as to drive the supporting member 60 to rotate relative to the connecting member 50. Of course, in other embodiments, the second rotating member 40 may not rotate relative to the connecting member 50 during the sliding and rotating process, i.e. the supporting member 60 and the connecting member 50 remain stationary, and the two supporting members 60 may be folded together.

Similarly, when the folding device 1 is unfolded, that is, when the folding device 1 is in the process of moving from the folded state to the unfolded state, the two connecting members 50 rotate reversely relative to the base 10 and move away from each other, because the first rotating member 30 and the second rotating member 40 both rotate to connect the base 10, the connecting members 50 can drive the first rotating member 30 and the second rotating member 40 to rotate relative to the base 10. And during the rotation of the first rotating member 30 and the second rotating member 40, the second rotating member 40 may also slide relative to the connecting member 50, i.e., the connecting member 50 may slide along the second rotating member 40, thereby changing the distance between the connecting member 50 and the base 10. When the connecting piece 50 slides, the supporting piece 60 is disposed on the connecting piece 50, so that the connecting piece 50 can drive the supporting piece 60 to slide together, and when the supporting piece 60 slides, the second rotating piece 40 can also slide and rotate relative to the supporting piece 60, so as to drive the supporting piece 60 to rotate relative to the connecting piece 50. Of course, in other embodiments, the second rotating member 40 may not rotate relative to the connecting member 50 during the sliding and rotating process, i.e. the supporting member 60 and the connecting member 50 remain stationary, and eventually the two supporting members 60 may be unfolded from each other.

In other embodiments, the active and passive relationships of the above-mentioned components may be reversed, for example, the supporting member 60 may be rotated relative to the base 10 to drive the first rotating member 30, the second rotating member 40, and the connecting member 50 to rotate relative to the base 10. Such movement processes and principles are also within the scope of the present application.

As shown in fig. 21, when the two supports 60 are parallel to each other and the two supports 60 are located on opposite sides of the base 10, the two supports 60 are in a state of being fully unfolded from each other at this time, in other words, the folding device 1 is in the unfolded state mentioned above. As shown in fig. 23, when both the supporting pieces 60 are located at one side of the base 10 and both the supporting pieces 60 are located at the top surface 101 of the base 10, the two supporting pieces 60 are in a state of being completely folded with each other, in other words, the folding device 1 is in a folded state. The process from fig. 21 to 23 can also be understood as the process from the unfolded state to the folded state of the folding device 1 when the two supports 60 are folded over each other. The procedure from fig. 23 to 21 can also be understood as the procedure from the folded state to the unfolded state of the folding device 1 when the two supports 60 are unfolded from each other.

When the folding device 1 is in a folded state, the two supporting members 60 and the base 10 together enclose a screen accommodating space 1a for accommodating the flexible screen, and the folding device 1 provided in this embodiment can make the cross-sectional shape of the screen accommodating space 1a be U-shaped or drop-shaped. When the cross-sectional shape of the space Rong Bing is U-shaped, the distance between the two supporting members 60 at the end far from the base 10 is equal to the distance between the two supporting members 60 at the end near to the base 10, and at this time, the mechanism of the folding device 1 is simple and the reliability of the whole machine is high. When the cross-sectional shape of the space Rong Bing is a drop shape, the distance between the two support members 60 at the end far from the base 10 is smaller than the distance between the two support members 60 at the end near the base 10, and the folded folding device 1 is thin and flat as a whole. In this embodiment, only the cross-sectional shape of the screen-accommodating space 1a is schematically described as a water drop shape.

In addition, the rotating member 40 'includes at least one of the first rotating member 30 and the second rotating member 40, that is, the first rotating member 30 may be the above-mentioned rotating member 40' so as to be engaged with the first gear assembly 21, or the second rotating member 40 may be the above-mentioned rotating member 40 'so as to be engaged with the first gear assembly 21, or both the first rotating member 30 and the second rotating member 40 may be the above-mentioned rotating member 40' so as to be engaged with the first gear assembly 21. In other words, the above-mentioned rotating member 40' is a component of the first rotating member 30 and the second rotating member 40, and is named differently. In the present embodiment, only the rotating element 40 'is schematically described as the second rotating element 40, and the rotating element 30' may be the second rotating element 40.

Referring to fig. 24-25 together, the housing assembly 2 provided in the present embodiment includes a first housing 91, a second housing 92, and a folding device 1 provided in the above embodiment of the present application, wherein the folding device 1 is connected between the first housing 91 and the second housing 92.

The housing assembly 2 is a modular component, i.e. the housing assembly 2 comprises at least two components. The housing assembly 2 in this embodiment mainly comprises two housings and the folding device 1 provided in the above embodiments of the present application. The first and second housings 91 and 92 are mainly used for mounting and carrying components, for example, flexible screens can be carried on the first and second housings 91 and 92, and functional modules such as batteries, PCB assemblies, speakers, handsets, keys and the like can be disposed in the first and second housings 91 and 92, so that the first and second housings 91 and 92 mainly perform mounting, protecting and the like functions. In some embodiments, the surfaces of the first and second cases 91 and 92 may also serve as exterior surfaces, so the surfaces of the first and second cases 91 and 92 may be designed accordingly to have unique exterior effects on the first and second cases 91 and 92. The present embodiment is not limited to the shape, material, structure, and other parameters of the first and second cases 91 and 92, as long as the functions of mounting and protection can be achieved. For example, the materials of the first housing 91 and the second housing 92 may be all metals, all plastics, or part of metals and part of plastics.

One connecting piece 50 of the folding device 1 is connected with the first shell 91, and the other connecting piece 50 is connected with the second shell 92, so that when the first shell 91 and the second shell 92 rotate, the two connecting pieces 50 are driven to rotate relative to the base 10, and further the subsequent movement process is realized. For example, when the first housing 91 and the second housing 92 rotate, the two connecting members 50 on two sides of the base 10 can be driven to rotate relative to the base 10, and the rotation of the connecting members 50 can further drive the subsequent first rotating member 30, the second rotating member 40, the supporting member 60, and other components to move according to the above-mentioned movement modes. Alternatively, the housing and the connecting piece 50 may be fixed by screws, or by snap or dispensing.

When the housing assembly 2 is folded, the first housing 91 and the second housing rotate relative to the base 10, so as to drive the connecting piece 50 connected with the first housing 91 and the second housing 92 to rotate relative to the base 10, the first rotating piece 30 and the second rotating piece 40 also rotate relative to the base 10, the second rotating piece 40 also slides relative to the connecting piece 50, the second rotating piece 40 also slides and rotates relative to the supporting piece 60, the supporting piece 60 also rotates relative to the connecting piece 50, and finally the two supporting pieces 60 are folded mutually. When the folding device 1 is unfolded, the first shell 91 and the second shell rotate relative to the base 10, so that the connecting piece 50 connected with the first shell 91 and the second shell is driven to rotate relative to the base 10, the first rotating piece 30 and the second rotating piece 40 also rotate relative to the base 10, the second rotating piece 40 also slides relative to the connecting piece 50, the second rotating piece 40 also slides and rotates relative to the supporting piece 60, the supporting piece 60 also rotates relative to the connecting piece 50, and finally the two supporting pieces 60 are unfolded mutually.

The housing assembly 2 provided in this embodiment can realize torsion adjustment, miniaturize the folding device 1, reduce the wear degree of the first cam member 22 and the second cam member 23, and improve the service life by adopting the folding device 1 provided in the above embodiment.

Referring to fig. 26-27 together, the electronic device 3 provided in this embodiment includes a flexible screen 93, and the housing assembly 2 provided in the above embodiment of the present application, where the flexible screen 93 is disposed on the same side of the first housing 91, the second housing 92, and the folding device 1.

The electronic device 3 provided in this embodiment includes, but is not limited to, mobile terminals such as a mobile phone, a tablet computer, a notebook computer, a palm top computer, a personal computer (Personal Computer, PC), a personal digital assistant (Personal Digital Assistant, PDA), a portable media player (Portable Media Player, PMP), a navigation device, a wearable device, a smart bracelet, a pedometer, and a fixed terminal such as a digital TV, a desktop computer, and the electronic device 3 is only schematically illustrated as a folding mobile phone.

The electronic device 3 includes a flexible screen 93 and a housing assembly 2, the flexible screen 93 being a member having a certain flexibility, the flexible screen 93 being bendable to a certain extent compared to a rigid member. For example, the flexible screen 93 includes, but is not limited to, flexible display screens, flexible touch display screens, and the like, various flexible members having corresponding functions, or flexible members to which a flexible support plate is fixedly attached, such as flexible display screens to which a flexible steel plate is attached, flexible touch screens, and the like. The flexible screen 93 is disposed on the same side of the housing assembly 2 as the first housing 91 and the second housing 92, and may be folded or flattened with the housing assembly 2. Specifically, the flexible screen 93 has a inflection region 930 and non-inflection regions 931 disposed on opposite sides of the inflection region 930. The flexible screen 93 of the bending region 930 is disposed corresponding to the supporting member 60 of the folding device 1, and the flexible screen 93 of the non-bending region 931 is fixedly disposed corresponding to the first casing 91 and the second casing 92 of the casing assembly 2. The flexible screen 93 of the bending area 930 is correspondingly disposed on the supporting member 60 of the folding device 1, so that the shape of the folding device 1 will change during movement, and the flexible screen 93 of the bending area 930 can be driven to bend or flatten along with movement of the electronic device 3. The non-bending region 931 is fixedly disposed on the first and second cases 91 and 92, so that the first and second cases 91 and 92 only rotate relatively and the shape of the non-bending region 931 does not change, and therefore the flexible screen 93 of the first and second cases 91 and 92 does not bend even when the first and second cases 91 and 92 rotate.

When the electronic device 3 is folded, the first housing 91 and the second housing rotate relative to the base 10, so as to drive the connecting piece 50 connected with the first housing 91 and the second housing 92 to rotate relative to the base 10, the first rotating piece 30 and the second rotating piece 40 also rotate relative to the base 10, the second rotating piece 40 also slides relative to the connecting piece 50, the second rotating piece 40 also slides and rotates relative to the supporting piece 60, the supporting piece 60 also rotates relative to the connecting piece 50, so that the two supporting pieces 60 are mutually folded, and finally, the two opposite ends of the flexible screen 93 are mutually folded. When the folding device 1 is unfolded, the first shell 91 and the second shell rotate relative to the base 10, so that the connecting piece 50 connected with the first shell 91 and the second shell is driven to rotate relative to the base 10, the first rotating piece 30 and the second rotating piece 40 also rotate relative to the base 10, the second rotating piece 40 also slides relative to the connecting piece 50, the second rotating piece 40 also slides and rotates relative to the supporting piece 60, the supporting piece 60 also rotates relative to the connecting piece 50, the two supporting pieces 60 are mutually unfolded, and finally the flexible screen 93 is unfolded.

The electronic device 3 according to the present embodiment can improve the torsion by adopting the housing assembly 2 according to the above embodiment of the present application, miniaturize the folding device 1, reduce the wear degree of the first cam member 22 and the second cam member 23, and improve the service life.

Alternatively, in the present embodiment, both ends of the flexible screen 93 are folded over each other and shielded by the first and second housings 91 and 92 when the electronic apparatus 3 is in the folded state. Namely, the first and second housings 91 and 92 protect the flexible screen 93, and only the first and second housings 91 and 92 are exposed to the outside for viewing by the user. The electronic device 3 at this time may be also referred to as an in-folded electronic device 3.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, connected, detachably connected, or integrated. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The foregoing has outlined rather broadly the more detailed description of the embodiments herein in order that the principles and embodiments herein may be better understood, and in order that the present principles and embodiments may be better understood. However, the content of the present specification should not be construed as limiting the present application, and those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Such modifications and variations of the present application are within the scope of the claims and their equivalents.

Claims

1. A folding device, comprising:

A base;

the rotating piece is rotationally connected with the base;

the rotating shaft is arranged on the base;

2. The folding apparatus of claim 1, wherein the second cam member is non-rotatably sleeved on the rotating shaft; the elastic piece is in a compressed state, so that the first cam piece has a first torsion force, and the rotating piece has a second torsion force, and the second torsion force is larger than the first torsion force.

3. The folding device according to claim 2, wherein the first gear portion has a first number of teeth T1, the second gear has a second number of teeth T2, the first gear has a third number of teeth T3, and a circumferential turn of the rotating member can have a fourth number of teeth T4, (T2/T1) × (T4/T3) >1.

4. The folding apparatus according to claim 1, wherein the rotating member includes a second gear portion and a rotating portion connected to each other, the second gear portion including a first portion and a second portion in a circumferential direction, a circumferential side surface of the first portion being provided with a plurality of teeth for meshing with the first gear; the second part is provided with a limiting groove, the base is provided with a limiting part, wherein the limiting part is abutted against the groove wall on one side of the limiting groove when the folding device is in an unfolding state, and the limiting part is abutted against the groove wall on the other side of the limiting groove when the folding device is in a folding state.

5. The folding apparatus of claim 1, further comprising a rotating member rotatably coupled to the base and a second gear assembly engaged with the rotating member and the first gear assembly, the rotating member, the first gear assembly, the second gear assembly, and the rotating member cooperating with one another to enable the rotating member and the rotating member to counter-rotate in synchronization with one another.

6. The folding apparatus of claim 5, wherein the circumferential turn of the rotating member can have the same number of teeth as the circumferential turn of the rotating member can have.

7. The folding device of claim 6, wherein the number of the rotating shaft, the second cam piece and the elastic piece is two, and each rotating shaft is respectively sleeved with one second cam piece and one elastic piece; the first cam piece is sleeved on one rotating shaft and matched with one second cam piece, the rotating piece is sleeved on the other rotating shaft, the rotating piece is provided with a cam part matched with the other second cam piece, the second gear assembly comprises third gears respectively meshed with the first gears and the rotating piece, and the number of teeth of the third gears is equal to that of the first gears.

8. The folding apparatus of claim 6, wherein the number of said shafts, said first cam member, said second cam member and said elastic member is two, and each of said shafts is respectively sleeved with one of said first cam member, one of said second cam member and one of said elastic member; the second gear assembly further comprises a fourth gear coaxially and fixedly arranged with the third gear, and the fourth gear is meshed with the first gear part of one of the first cam pieces.

9. The folding apparatus according to claim 8, wherein the first gear portion has a first number of teeth T1, the fourth gear has a fifth number of teeth T5, the third gear has a sixth number of teeth T6, and a circumferential turn of the rotary member can have a seventh number of teeth T7, (T5/T1) × (T7/T6) >1.

10. The folding apparatus of claim 9, wherein the second gear has a second number of teeth T2, the first gear has a third number of teeth T3, and a circumferential turn of the rotating member can have a fourth number of teeth T4, (T2/T1) = (T4/T3) = (T5/T1) = (T7/T6).

11. The folding apparatus according to claim 8, wherein the second gear and the fourth gear are arranged in an axial direction of the rotation shaft, and the second gear coincides with an orthographic projection portion of the fourth gear in the axial direction of the rotation shaft.

12. The folding apparatus according to claim 1, further comprising a blocking member fixed to a side of the elastic member facing away from the second cam member on the rotation shaft, the other end of the elastic member abutting the blocking member.

13. The folding device of any of claims 1-12, wherein the folding device further comprises:

The two first rotating parts are respectively connected to two opposite sides of the base in a rotating way;

two second rotating parts which are respectively connected to two opposite sides of the base in a rotating way;

two connecting pieces, wherein one of the first rotating piece and the second rotating piece which are positioned on the same side of the base is rotationally connected with the connecting piece, and the other one is slidingly connected with the connecting piece; and

two supporting members, each of which is rotatably connected with one of the connecting members and slidably and rotatably connected with the other of the first rotating member and the second rotating member;

the rotating piece is at least one of the first rotating piece and the second rotating piece.

14. A housing assembly comprising a first housing, a second housing, and a folding device according to any one of claims 1-13, the folding device being connected between the first housing and the second housing.

15. An electronic device comprising a flexible screen and the housing assembly of claim 14, wherein the flexible screen is disposed on the same side of the first housing, the second housing, and the folding device.