Folding device, shell assembly and electronic equipment

Abstract

The invention provides a folding device, a shell assembly and electronic equipment. The folding device comprises a base, two first supporting pieces and two second supporting pieces. The two first supporting pieces are arranged on the two opposite sides of the base respectively and can move relative to the base. Each second supporting piece is fixed to the supporting face of the corresponding first supporting piece and extends out of the edge, close to the base, of the corresponding first supporting piece. When the folding device is in the unfolded state, a distance exists between the two second supporting pieces, and the part of each second supporting piece corresponds to the gap between the two first supporting pieces. Through the arrangement of the second supporting piece, a middle plate structure can be omitted, so that the flexible screen is supported in an unfolded state, and the problems of unfolding depression and pressing vacancy are avoided. The size of the screen accommodating space in the folded state is larger, the flexible screen can be better accommodated, the stress of the flexible screen is reduced, and the service life of the flexible screen is prolonged.

Description

Technical Field

[0001] The present application belongs to the technical field of folding devices, and in particular relates to a folding device, a housing assembly and an electronic device. Background Art

[0002] Competition in the mobile terminal industry is increasingly trending towards large screens and ultra-thin devices, but large screens make the entire device too large and inconvenient to carry. Foldable electronic devices can solve the above problem by changing the size of the electronic device due to their folding function, and are now very popular with users. Electronic devices rely on folding devices to achieve the folding function. Currently, folding devices usually use a three-plate structure consisting of two inclined plates and a middle plate to support the flexible screen, but the middle plate is usually fixed when the folding device is folded. Therefore, when the folding device is in a folded state, the screen space formed by the middle plate and the two inclined plates for accommodating the flexible screen is relatively small. Summary of the invention

[0003] In view of this, the first aspect of the present application provides a folding device, comprising:

[0004] Pedestal;

[0005] two first support members, the two first support members are respectively disposed on opposite sides of the base and are capable of moving relative to the base; and

[0006] Two second support members, each of which is fixed to a support surface of one of the first support members and extends beyond the edge of the first support member close to the base; when the folding device is in an unfolded state, there is a spacing between the two second support members, and a portion of each second support member is set corresponding to the gap between the two first support members.

[0007] In the folding device provided in the first aspect of the present application, two first support members are arranged on opposite sides of the base so that a gap is set between the two first support members. By fixing a second support member on the support surface of each first support member, and extending the second support member beyond the edge of the first support member close to the base, the portion of the second support member on the basis of the spacing between the two second support members can correspond to the gap between the two first support members. In other words, the two second support members, on the basis of being fixed to the first support members, will also extend along the inside of the folding device, so that the second support members will block the gap between the two first support members.

[0008] It is understandable that the folding device provided by the present application does not need to be provided with a middle plate structure, and the part of the second support member extending to the gap is used to act as a "middle plate" to make up for its vacancy. Therefore, when the folding device is in the unfolded state, the two second support members can be used to support the flexible screen. At this time, the second support member can simultaneously act as the role of the inclined plate and the middle plate, avoiding the problem of unfolding depression and pressing virtual position due to the lack of the middle plate. Since the present application omits the middle plate and only uses two second support members to support the flexible screen, it is equivalent to reducing the number of parts supporting the flexible screen, which can not only realize the miniaturization of the folding device, but also reduce the control requirements for the flatness and straightness of the parts, which can better determine the unfolding light and shadow of the flexible screen and improve the smoothness of the flexible screen. And compared with the setting of the middle plate, the present application does not need to set the avoidance hole on the middle plate, thereby further avoiding the problem of unfolding depression and pressing virtual position. In addition, the present application can keep the size, material and other related parameters of the first support member unchanged, and only needs to add a second support member thereon, which reduces the process difficulty and saves costs.

[0009] In addition, the two second support members are not connected together but have a spacing therebetween. In other words, the two second support members are independent components. When the folding device is folded, the two first support members move relative to the base so as to approach each other, and can drive their respective second support members to move synchronously relative to the base so as to approach each other. Therefore, when the folding device is in a folded state, there is a gap due to the lack of a middle plate, and the portion of the second support member originally set corresponding to the gap also moves during the folding process to make way for the gap position, resulting in a larger screen space formed by the two second support members when the folding device is in a folded state, which can better accommodate the flexible screen, reduce the stress of the flexible screen, and increase the service life of the flexible screen.

[0010] A second aspect of the present application provides a shell assembly, which includes a first shell, a second shell, and a folding device as provided in the first aspect of the present application, and the folding device is connected between the first shell and the second shell.

[0011] The shell assembly provided in the second aspect of the present application, by adopting the folding device provided in the first aspect of the present application, can support the flexible screen in the unfolded state, and at the same time can increase the screen capacity space of the flexible screen in the folded state, reduce the stress of the flexible screen, and increase the service life of the flexible screen.

[0012] A third aspect of the present application provides an electronic device, comprising a flexible screen and a shell assembly as provided in the second aspect of the present application, wherein the flexible screen is arranged on the same side of the first shell, the second shell, and the folding device.

[0013] The electronic device provided in the third aspect of the present application, by adopting the shell assembly provided in the second aspect of the present application, can support the flexible screen in the unfolded state, and at the same time can increase the screen capacity space of the flexible screen in the folded state, reduce the stress of the flexible screen, and increase the service life of the flexible screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the implementation modes of the present application will be described below.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the folding device in an embodiment of the present application when it is in an unfolded state.

[0016] Figure 2 for Figure 1 An exploded view of the folding device is shown.

[0017] Figure 3 for Figure 1 A front view of the folding device is shown.

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the folding device in one embodiment of the present application when it is in a folded state.

[0019] Figure 5 for Figure 4 A front view of the folding device is shown.

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of two second support members in one embodiment of the present application.

[0021] Figure 7 for Figure 6 An exploded view of the two second supports is shown.

[0022] Figure 8 for Figure 6 A front view of the two second supports is shown.

[0023] Fig. 9 This is a front view of a second support member in another embodiment of the present application.

[0024] Fig.10 for Fig. 9 A schematic diagram of the cooperation between the second support member and the first support member is shown.

[0025] Fig.11 This is a front view of a second support member in yet another embodiment of the present application.

[0026] Fig.12 This is a front view of a second support member in yet another embodiment of the present application.

[0027] Fig.13 It is a top view of the first supporting layer in one embodiment of the present application.

[0028] Fig.14 for Fig.13 A partial schematic diagram of the first supporting layer is shown.

[0029] Fig.15 This is a schematic diagram of the three-dimensional structure of the folding device in another embodiment of the present application when it is in an unfolded state.

[0030] Fig.16 for Fig.15 An exploded view of the folding device is shown.

[0031] Fig.17 for Fig.16 An exploded view of a track mechanism in a folding device is shown.

[0032] Fig.18 for Fig.15 A front view of the folding device is shown.

[0033] Fig.19 This is a schematic diagram of the three-dimensional structure of the folding device in another embodiment of the present application when it is in a folded state.

[0034] Fig. 20 for Fig.19 A front view of the folding device is shown.

[0035] Fig.21 It is a schematic diagram of the coordination of the base, the first rotating member, the second rotating member and the connecting member in one embodiment of the present application.

[0036] Fig. 22 It is an exploded front view of the base, the second rotating member and the connecting member in one embodiment of the present application.

[0037] Fig.23 It is an exploded schematic diagram of the base, the second rotating member and part of the first supporting member in one embodiment of the present application.

[0038] Fig.24 It is a cross-sectional schematic diagram of the base, the second rotating member and the first supporting member when the folding device is in an unfolded state in one embodiment of the present application.

[0039] Fig.25 It is a cross-sectional schematic diagram of the base, the second rotating member and the first supporting member when the folding device is in a folded state in one embodiment of the present application.

[0040] Fig.26 It is a top view of the track mechanism in one embodiment of the present application.

[0041] Fig. 27It is a schematic diagram of the three-dimensional structure of the shell assembly in an embodiment of the present application when it is in an unfolded state.

[0042] Fig.28 It is a schematic diagram of the three-dimensional structure of the shell assembly in one embodiment of the present application when it is in a folded state.

[0043] Fig.29 It is a schematic diagram of the three-dimensional structure of an electronic device in an unfolded state according to one embodiment of the present application.

[0044] Fig.30 It is a schematic diagram of the three-dimensional structure of an electronic device in a folded state according to one embodiment of the present application.

[0045] Description of labels:

[0046] Folding device-1, screen space-1a, track mechanism-1b, shell assembly-2, electronic device-3, base-10, bottom surface-100, first rotation axis-C1, second rotation axis-C2, first rotating member-30, second rotating member-40, accommodating groove-400, first spiral surface-401, sliding block-42, first rolling axis-43, connecting member-50, back side-500, sliding groove-52, first supporting member-60, supporting surface-600, first avoidance hole-601, supporting part-61, rolling part-62, first rolling groove-620, first limiting end-621, second limiting end-622, first connecting part-623, second connecting part -624, second supporting member -70, first supporting layer -71, bonding surface -710, bending hole -711, extension hole -7111, arc hole -7112, second supporting layer -72, third supporting layer -73, first part -731, second part -732, second avoidance hole -733, first bonding layer -74, second bonding layer -75, filling layer -76, decorative member -80, synchronous member -81, second spiral surface -810, first sub-synchronous member -811, second sub-synchronous member -812, elastic member -813, rotating shaft -82, first shell -91, second shell -92, flexible screen -93, bending area -930, non-bending area -931. DETAILED DESCRIPTION

[0047] The following are preferred implementations of the present application. It should be noted that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

[0048] With the market demand for the "display area" of terminal products such as mobile phones and tablets, the competition in the mobile terminal industry is increasingly tending towards large screens and ultra-thinness. However, large screens make the size of the whole machine too large and inconvenient to carry. The smartphone industry is ushering in an experience revolution brought about by form innovation. The display form of mobile phone products has developed from the initial hard screen to flexible screen, from small screen to large screen, from static mechanism to motion mechanism. Recently, major mobile phone manufacturers have been developing folding screens, striving to expand the form and display boundaries of mobile phone products, so that they have the functions of mobile phones, tablets and even computers. As an electronic device with a new display form, the foldable display terminal can be unfolded or closed due to its folding function, resulting in a larger display area in the unfolded state and a smaller overall size in the folded state, which can solve the above problems. It is now loved by the majority of users.

[0049] The foldable display terminal relies on the folding device inside it to achieve the folding function. The folding device usually includes two inclined plates and a middle plate, which can also be called a three-plate structure. The inclined plate and the middle plate are both used to support the flexible screen. The two inclined plates can perform various movements relative to the base driven by other components, but the middle plate is usually relatively immobile. Therefore, when the folding device is in a folded state, the screen space formed by the middle plate and the two inclined plates for accommodating the flexible screen is limited and small in size. In addition, the unfolding light and shadow of the flexible screen is affected by the components supporting the flexible screen, that is, it is affected by the three components of two inclined plates and one middle plate. This makes it difficult to control the flatness and straightness of the components, affecting the smoothness of the flexible screen. At this time, the existence of the middle plate requires the opening of an avoidance hole on the middle plate to avoid other components. Therefore, when the folding device is in an unfolded state, the position of the flexible screen corresponding to the avoidance hole is prone to unfolding depressions and pressing virtual positions.

[0050] In order to solve the above technical problems, this application provides a folding device. Please refer to Figure 1-Figure 8 The folding device 1 provided in this embodiment includes a base 10, two first support members 60, and two second support members 70. The two first support members 60 are respectively arranged on opposite sides of the base 10 and can move relative to the base 10. Each second support member 70 is fixed to a support surface 600 of a first support member 60 and extends beyond the edge of the first support member 60 close to the base 10. When the folding device 1 is in the unfolded state, there is a gap between the two second support members 70, and a portion of each second support member 70 is arranged corresponding to the gap between the two first support members 60.

[0051] The folding device 1 can also be called a shaft or hinge, and is mainly used in electronic products such as mobile phones, tablets, computers, etc. It can also be used in other non-electronic products that require a torque shaft, such as doors, windows, etc. The folding device 1 provided in this embodiment mainly includes a base 10, a first support member 60, and a second support member 70, which means that this embodiment can solve the above-mentioned technical problems using only the base 10, the first support member 60, and the second support member 70. However, in other embodiments, the folding device 1 may also include other components, such as connecting members, rotating members, synchronization mechanisms, torque mechanisms, etc. Next, this embodiment will introduce the base 10, the first support member 60, and the second support member 70 in detail.

[0052] The base 10 is a basic component of the folding device 1, and is mainly used to provide a foundation for the installation and fixing of other components, that is, many components of the folding device 1 can be installed on the base 10. When the folding device 1 moves, the base 10 itself is fixed, and other components of the folding device 1 mainly perform various movements. This embodiment does not limit the parameters such as the shape, structure, and material of the base 10, as long as it can provide an assembly foundation for other components.

[0053] Optionally, the base 10 has a top surface, a bottom surface 100, and a side surface that is bent and connected between the top surface and the bottom surface 100. When the folding device 1 is subsequently applied to an electronic device, the top surface can be close to the flexible screen of the electronic device, the bottom surface 100 is away from the flexible screen, and the bottom surface 100 can also cooperate with the decorative member, and the decorative member 80 is used to cover the base 10. In other words, the upper surface of the base 10 is the top surface, and the lower surface is the bottom surface 100. Further optionally, both the top surface and the bottom surface 100 are planes, which is convenient for subsequent cooperation with other components. The side surface is a convexly arranged arc surface, which improves the appearance of the base 10 and is convenient for cooperation with the decorative member 80.

[0054] In the related art, the first support member 60 is mainly used to support and carry the flexible screen, so the upper surface of the first support member 60 can also be called a support surface 600, and the first support member 60 can also be called an inclined plate. In this embodiment, the first support member 60 is mainly used to support and fix the second support member 70. The two first support members 60 are arranged on opposite sides of the base 10, so there is a certain gap between the two first support members 60. The first support member 60 can move relative to the base 10. Optionally, the first support member 60 can be directly connected to the base 10, or the first support member 60 can be indirectly connected to the base 10 through other components such as a rotating member, a connecting member, etc., so as to realize the movement of the first support member 60 relative to the base 10. Optionally, the first support member 60 can slide and / or rotate relative to the base 10. The bending shape of the flexible screen can be controlled by the movement trajectory of the first support member 60 relative to the base 10. This embodiment does not limit the parameters such as the shape, structure, and material of the first support member 60, as long as it can move relative to the base 10 and fix the second support member 70.

[0055] In the related art, the folding device 1 includes not only two inclined plates but also a middle plate between the two inclined plates, and three plates are used to support and control the flexible screen. In this embodiment, only two inclined plates, namely two first support members 60, are retained by omitting the middle plate, and a second support member 70 is fixed on the upper surface of the first support member 60, namely the support surface 600. Therefore, when the folding device 1 is subsequently applied to an electronic device, the first support member 60 no longer supports the flexible screen, but the second support member 70 supports the flexible screen. Although a total of four plates are included, in fact, only two second support members 70 are used to support the flexible screen, so the folding device 1 provided in this embodiment can also be called a two-plate structure. Compared with the three-plate structure, this embodiment reduces the number of components supporting the flexible screen, which not only realizes the miniaturization of the folding device 1, but also reduces the control requirements for the flatness and straightness of the components, which can better determine the unfolding light and shadow of the flexible screen and improve the smoothness of the flexible screen. In addition, in this embodiment, there is no need to set a avoidance hole on the middle plate, thereby avoiding the problem of unfolding depression and pressing virtual position. Optionally, the second support member 70 can be fixed to the support surface 600 of the first support member 60 by bonding, clamping, screw connection, etc. This embodiment does not limit the shape, structure, material and other parameters of the second support member 70, as long as it can be fixed to the first support member 60 and support the flexible screen.

[0056] The second support member 70 is not completely fixed on the first support member 60. In other words, only a part of the second support member 70 is used to be fixed on the first support member 60 to achieve a fixed connection between the second support member 70 and the first support member 60, so as to provide a mounting base for the second support member 70, and the subsequent movement of the first support member 60 relative to the base 10 can drive the second support member 70 to move. Figure 3As shown, when the folding device 1 is in the unfolded state, the rest of the second support member 70 can extend beyond the edge of the first support member 60 close to the base 10, so that the extended parts of the two second support members 70 correspond to the gap between the two first support members 60. In other words, the two second support members 70, on the basis of being fixed to the first support member 60, will also extend along the inside and center of the folding device 1, so that the second support member 70 will block the gap between the two first support members 60. In this way, the part of the second support member 70 extending to the gap can be used to act as a "middle plate" to make up for its vacancy. At this time, the second support member 70 can act as both an inclined plate and a middle plate. When the folding device 1 is in the unfolded state, the two second support members 70 can be used to support the flexible screen to avoid the problem of unfolding depression and pressing virtual position due to the lack of a middle plate.

[0057] The above content can also be understood as that the present embodiment can keep the size, material and other related parameters of the first support member 60 unchanged, and only set the second support surface 600 on the support surface 600 of the first support member 60 and extend it inward to solve the support problem caused by the lack of the middle plate. Compared with the first support member 60, the process difficulty can be reduced and the cost can be saved.

[0058] In addition, the two second support members 70 are not connected together but have a distance therebetween. In other words, the two second support members 70 are independent components. Figure 5 As shown, when the folding device 1 is folded, the two first support members 60 move relative to the base 10 and approach each other, and can drive their respective second support members 70 to move relative to the base 10 synchronously and approach each other. Therefore, when the folding device 1 is in the folded state, there is a gap due to the lack of a middle plate, and the extended portion of the second support member 70 originally set corresponding to the gap also moves during the folding process to make way for the gap, resulting in a larger screen space 1a formed by the two second support members 70 when the folding device 1 is in the folded state, which can better accommodate the flexible screen, reduce the stress of the flexible screen, and increase the service life of the flexible screen.

[0059] Optionally, when the folding device 1 is in the unfolded state, the gap between the two second support members 70 is 0.3mm-1mm. If the gap is too small, it is easy to cause the two second support members 70 to interfere with each other in motion, and the accommodation space below the second support member 70 cannot accommodate the second support member 70. However, if the gap is too large, the supporting effect will be reduced, resulting in unfolding depression and pressing virtual position problems. Specifically, the gap between the two second support members 70 can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm.

[0060] Please refer again Figure 3 ,and Figure 5-Figure 8In this embodiment, the second support member 70 includes a first support layer 71 and a second support layer 72 which are stacked, the first support layer 71 having a bonding surface 710 connected to the support surface 600, and the second support layer 72 is bonded to the bonding surface 710 and can be arranged corresponding to the gap. The second support member 70 can be a two-layer structure, specifically composed of a first support layer 71 and a second support layer 72. The surface of the first support layer 71 that faces away from the first support member 60, that is, the upper surface, is subsequently used to support the flexible screen, and the surface of the first support layer 71 that faces the first support member 60, that is, the lower surface, can be referred to as the bonding surface 710. A portion of the first support layer 71 is directly or indirectly bonded to the support surface 600 of the first support member 60 through the bonding surface 710. The second support layer 72 is also bonded to the bonding surface 710, i.e., the lower surface, of the first support layer 71, but the second support layer 72 is bonded to the portion of the first support layer 71 that is not bonded to the first support member 60. In other words, the second support layer 72 is bonded to the portion of the first support layer 71 corresponding to the gap. Therefore, when the folding device 1 is in the unfolded state, the second support layer 72 can also be set corresponding to the gap.

[0061] In summary, this embodiment uses the first supporting layer 71 to support the flexible screen and uses the second supporting layer 72 to set the corresponding gap, which can increase the thickness of the second supporting member 70 at the gap, thereby improving the structural strength of the second supporting member 70 at the gap and further improving the supporting performance of the second supporting member 70.

[0062] Optionally, the material of the first support layer 71 and the second support layer 72 includes but is not limited to stainless steel, aluminum alloy, magnesium alloy, carbon fiber, etc. Further optionally, the material of the first support layer 71 is 316 stainless steel. As for the thickness of the first support layer 71 and the second support layer 72, this embodiment is not limited here.

[0063] In this embodiment, when the folding device 1 is folded, the two first support members 60 are close to each other, and the shape of the second support member 70 remains unchanged. Alternatively, each second support member 70 can be bent in a direction away from another second support member 70 .

[0064] When the folding device 1 is folded, the first support member 60 can drive the second support member 70 fixed thereon to move relative to the base 10 so as to approach each other. The second support member 70 has two forms of movement during the folding process: in one form of movement, because the size of the folding device 1 is large enough, or the extended portion of the second support member 70 is small, the second support member 70 is only controlled by the first support member 60 during the entire folding process and does not contact other components, resulting in the shape of the second support member 70 itself remaining unchanged. At this time, when the folding device 1 is in a folded state, the two second support members 70 can be surrounded to form a U-shaped space. In another form of movement, if the size of the folding device 1 is small, or the extended portion of the second support member 70 is large, the second support member 70 may contact, collide, and resist certain components, such as the base 10, the subsequent first rotating member 30, the second rotating member 40, the synchronization mechanism, the track mechanism 1b, etc., in addition to being controlled by the first support member 60 during the entire folding process. At this time, the abutment portion of the second support member 70 cannot continue to rotate, but the portion of the second support member 70 fixed to the first support member 60 will continue to rotate, so the second support member 70 can bend in a direction away from the other second support member 70. In other words, the second support member 70 bends outward, thereby avoiding the problem of motion interference. When the folding device 1 is in the folded state, the two bent second support members 70 can enclose a water drop-shaped receiving space.

[0065] In one embodiment, the second support member 70 includes a first support layer 71 and a second support layer 72 which are stacked. The second support layer 72 can also be understood as a thickened portion of the first support layer 71, so that the first support layer 71 is thickened on the inner side. Therefore, when the folding device 1 is folded, the second support layer 72 arranged innerward is more likely to resist the base 10 and the various components mentioned above, so that the first support layer 71 is bent. In summary, the provision of the second support layer 72 can not only improve the support effect, but also control the bending of the first support layer 71 when folded, thereby better controlling the bending shape of the flexible screen.

[0066] Please refer to Figure 7 , Figure 9-10 In this embodiment, the second support member 70 also includes a third support layer 73 bonded to the support surface 600 and the bonding surface 710. The third support layer 73 and the second support layer 72 are arranged in the same layer and have a spacing. The thickness of the third support layer 73 is less than the thickness of the second support layer 72.

[0067] In addition to the first support layer 71 and the second support layer 72, the second support member 70 may also include a third support layer 73, wherein the third support layer 73 is bonded between the support surface 600 of the first support member 60 and the bonding surface 710 of the first support layer 71. In other words, the first support layer 71 is bonded to the first support member 60 through the third support layer 73, which can not only better bond, but also further increase the overall thickness of the first support layer 71 at the first support member 60, thereby increasing the structural strength of the first support member 60 and further improving the supporting effect. Optionally, the opposite sides of the third support layer 73 can be bonded and fixed by dispensing glue or back glue. Optionally, the material of the third support layer 73 includes but is not limited to stainless steel, aluminum alloy, magnesium alloy, carbon fiber, etc. Further optionally, the material of the third support layer 73 is 316 stainless steel.

[0068] Since the third support layer 73 and the second support layer 72 are both bonded to the bonding surface 710 of the first support layer 71, i.e., the lower surface, the third support layer 73 and the second support layer 72 are arranged in the same layer. In this embodiment, a spacing can be provided between the third support layer 73 and the second support layer 72, and when the second support layer 72 subsequently abuts against a component of the folding device 1, the first support layer 71 can be bent at the spacing. Optionally, the third support layer 73 is not entirely bonded to the bonding surface 710 of the first support layer 71, but is partially bonded to the bonding surface 710 of the first support layer 71, so that the portion not bonded to the third support layer 73 can also be bent later.

[0069] In addition, the thickness of the third supporting layer 73 is smaller than that of the second supporting layer 72 , which can ensure that the thickness of the first supporting member 60 at the corresponding gap is thicker, thereby effectively improving the supporting performance of the first supporting member 60 .

[0070] Optionally, the thickness of the first supporting layer 71 is smaller than the thickness of the third supporting layer 73 , so that the third supporting layer 73 provides better supporting performance and the first supporting layer 71 provides better bending performance.

[0071] Optionally, the thickness of the second support layer 72 is 3-10 times the thickness of the third support layer 73, which can improve the supporting effect of the first support member 60 at the gap. As for the specific thickness of the second support layer 72, it can also be designed based on the bending requirements of the first support layer 71 and other components of the folding device 1.

[0072] Further optionally, the thickness of the first supporting layer 71 is 0.01mm-0.05mm. Specifically, the thickness of the first supporting layer 71 can be 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm. Further optionally, the thickness of the second supporting layer 72 is 0.09mm-1mm. Specifically, the thickness of the second supporting layer 72 can be 0.09mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm. Further optionally, the thickness of the third supporting layer 73 is 0.03mm-0.10mm. Specifically, the thickness of the third supporting layer 73 can be 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm.

[0073] Please refer to Figure 7 and Fig.11 In this embodiment, the third supporting layer 73 includes a first part 731 and a second part 732 arranged along the arrangement direction of the third supporting layer 73 and the second supporting layer 72, and the second supporting member 70 also includes a first bonding layer 74 bonded between the first part 731 and the first supporting layer 71, a second bonding layer 75 bonded between the second supporting layer 72 and the first supporting layer 71, and a filling layer 76, one side of the filling layer 76 is bonded to the second part 732, and the other side can support the first supporting layer 71, and the thickness of the filling layer 76 is the same as that of the first bonding layer 74.

[0074] The third supporting layer 73 can be divided into a first part 731 and a second part 732. The first part 731 and the second part 732 are arranged along the arrangement direction of the second supporting layer 72 and the third supporting layer 73. In other words, the first part 731 and the second part 732 are arranged in sequence from left to right. The first part 731 is bonded to the first supporting layer 71 through the first bonding layer 74, that is, one side of the first bonding layer 74 is bonded to the first supporting layer 71, and the other side is bonded to the first part 731 of the third supporting layer 73. A filling layer 76 is provided between the second part 732 and the first supporting layer 71, but one side of the filling layer 76 is only bonded to the second part 732, and the other side can abut the first supporting layer 71, and in this embodiment, the thickness of the filling layer 76 and the first bonding layer 74 can be the same.

[0075] In summary, only the first part 731 of the third supporting layer 73 is bonded to the first supporting layer 71, and the second part 732 is not bonded to the first supporting layer 71, but the gap between the second part 732 and the first supporting layer 71 is filled by the filling layer 76 having the same thickness as the first bonding layer 74. Therefore, when the folding device 1 is in the unfolded state, the third supporting layer 73 as a whole can support the first supporting layer 71, thereby improving the supporting effect of the second supporting member 70. When the folding device 1 is in the folded state, since the second part 732 is not bonded to the first supporting layer 71, the first supporting layer 71 can bend in the area corresponding to the second part 732, thereby increasing the bending range and making it easier to control the bending position of the first supporting layer 71.

[0076] Optionally, the first adhesive layer 74 includes but is not limited to double-sided adhesive, and the filling layer 76 includes but is not limited to single-sided adhesive Teflon. Further optionally, the thickness of the first adhesive layer 74 and the thickness of the filling layer 76 are 0.01mm-0.05mm. Specifically, the thickness of the first adhesive layer 74 and the thickness of the filling layer 76 can be 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm.

[0077] In addition, the second supporting layer 72 is bonded to the first supporting layer 71 through the second adhesive layer 75, that is, one side of the second adhesive layer 75 is bonded to the first supporting layer 71, and the other side is bonded to the first portion 731 of the second supporting layer 72. Optionally, the second adhesive layer 75 includes but is not limited to double-sided adhesive. As for the relationship between the thickness of the second adhesive layer 75 and the thickness of the first adhesive layer 74 and the thickness of the filling layer 76, this embodiment is not limited here. Optionally, the thickness of the second adhesive layer 75 is the same as the thickness of the first adhesive layer 74 and the thickness of the filling layer 76. Further optionally, the thickness of the second adhesive layer 75 is 0.01mm-0.05mm. Specifically, the thickness of the second adhesive layer 75 can be 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm.

[0078] It is worth noting that the overall thickness of the second support member 70 provided in this embodiment can be less than the thickness of the middle plate in the related art, thereby reducing the thickness of the folding device 1. And since no middle plate is provided, this embodiment can also reduce the gap between the two first support members 60, thereby reducing the width of the folding device 1, and finally achieving the purpose of miniaturization of the folding device 1.

[0079] Please refer to Figure 12-14In this embodiment, the first support layer 71 includes a plurality of bending holes 711 arranged in an array. When the folding device 1 is in the unfolded state, the filling layer 76 and the second portion 732 cover at least part of the plurality of bending holes 711. The first support portion 61 includes a plurality of bending holes 711 arranged in an array. The arrangement of the plurality of bending holes 711 makes it easier for the first support layer 71 there to bend. If the first support layer 71 can be bent at the plurality of bending holes 711 when the folding device 1 is folded, the region of the plurality of bending holes 711 is the bending region of the first support layer 71. In this embodiment, when the folding device 1 is in the unfolded state, the filling layer 76 and the second portion 732 can correspond to at least part of the plurality of bending holes 711. In other words, the filling layer 76 and the second portion 732 can be located below the bending holes 711 in the unfolded state, and cover and support the plurality of bending holes 711. Therefore, the second portion 732 and the filling layer 76 can be used to support the bending holes 711 in the unfolded state, thereby improving the structural strength of the bending holes 711 and improving the supporting effect. In addition, when folded, since the filling layer 76 and the second portion 732 are held below the bending holes 711, the first supporting layer 71 can only bend in one direction, that is, bend in a direction away from the other supporting layer, thereby controlling the bending direction of the first supporting layer 71.

[0080] In summary, in this embodiment, the three support layers are arranged in a staggered manner so that the filling layer 76 and the second portion 732 support the first support layer 71 when unfolded, and limit the bending direction of the first support layer 71 when folded, thereby achieving directional bending.

[0081] Optionally, the first support layers 71 of the second support members 70 are each provided with a plurality of bending holes 711 arranged in an array, that is, one first support layer 71 is provided with a group of bending holes 711, and another first support layer 71 is provided with another group of bending holes 711. The distance between the two opposite sides of the two groups of bending holes 711 is equal to the width of the decorative member 80 provided on the base, thereby better controlling the bending position of the first support layer 71, thereby controlling the shape of the water drop-shaped screen space 1a formed by the two second support members 70 in the folded state, and further controlling the folding shape of the flexible screen.

[0082] In this embodiment, the bending hole 711 includes an extension hole 7111 along the extension direction of the first support layer 71 and an arc hole 7112 connected to at least one end of the extension hole 7111 .

[0083] The bending hole 711 may be composed of an extension hole 7111 and an arc hole 7112, wherein the extension hole 7111 extends along the extension direction of the first support layer 71, so as to facilitate the subsequent bending of the first support layer 71. Optionally, the extension hole 7111 is a long strip-shaped hole-like structure. The arc hole 7112 is, as the name implies, an arc-shaped hole-like structure, and the arc hole 7112 is arranged at any one end or two opposite ends of the extension hole 7111. The above content can also be understood as the bending hole 711 is a linear hole as a whole, but the end is an arc, which can prevent the first support layer 71 from cracking due to stress concentration, thereby increasing the service life of the first support layer 71. Optionally, the bending hole 711 can be prepared by an etching process.

[0084] Please refer again Figure 2 and Figure 7 In this embodiment, a first avoidance hole 601 is provided on a side of each first support member 60 close to another first support member 60, and a second avoidance hole 733 connected to the first avoidance hole 601 is provided on the third support layer 73. The orthographic projection of the filling layer 76 on the third support layer 73 is located outside the second avoidance hole 733.

[0085] The first support member 60 may interfere with other subsequent components during the movement relative to the base 10, so a first avoidance hole 601 may be opened on the side of the first support member 60 close to the other first support member 60, that is, on the inner side of the first support member 60, so that the folding device 1 can be folded and unfolded normally. Since the third support layer 73 is bonded to the support surface 600 of the first support member 60, the second avoidance hole 733 connected to the first avoidance hole 601 may be opened on the third support layer 73 at a position corresponding to the first avoidance hole 601, so that the folding device 1 can be folded and unfolded normally. In other words, the shape of the third support layer 73 is similar to or even the same as the support surface 600, which further improves the support effect.

[0086] The orthographic projection of the filling layer 76 on the third supporting layer 73 may be located outside the second avoidance hole 733, that is, the setting of the filling layer 76 will avoid the area of ​​the second avoidance hole 733, so as not to affect the movement of the folding device 1. Optionally, since the second avoidance hole 733 is opened on the third supporting layer 73, the third supporting layer 73 is not straight, but has many concave areas. Therefore, the number of filling layers 76 can be multiple, and multiple filling layers 76 are used to avoid the area of ​​the second avoidance hole 733. And / or, the filling layer 76 can also be opened corresponding to the second avoidance hole 733, so as to avoid the second avoidance hole 733.

[0087] Please refer to Figure 15-Figure 20The folding device 1 provided in this embodiment further includes two first rotating members 30, two second rotating members 40, and two connecting members 50. 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 located 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 first supporting member 60 is rotatably connected to one connecting member 50, and is slidably and rotatably connected to the other of the first rotating member 30 and the second rotating member 40.

[0088] The first rotating member 30, the second rotating member 40, the connecting member 50, and the first supporting member 60 in the folding device 1 can be collectively referred to as a track mechanism 1b, which is mainly used to control the movement tracks of the first supporting member 60 and the second supporting member 70, thereby controlling the cross-sectional shape of the flexible screen in the subsequent folding state, ensuring better support for the flexible screen without damaging the various layer structures in the flexible screen. Next, this embodiment will introduce the first rotating member 30, the second rotating member 40, and the connecting member 50 in detail in turn.

[0089] The two first rotating members 30 in the folding device 1 mainly realize the folding function through their ability to rotate, and the rotation of the two first rotating members 30 drives and limits the components connected to the two first rotating members 30, so that these components move according to a predetermined motion trajectory. The two first rotating members 30 are rotatably connected to the base 10 and the two first rotating members 30 are respectively arranged on opposite sides of the base 10, that is, the two first rotating members 30 can rotate relative to the base 10. In other words, the two first rotating members 30 are rotatably connected to the base 10 at one end close to the base 10. Since the base 10 is fixed, only the two first rotating members 30 rotate. The opposite sides of the base 10 mentioned in this embodiment refer to the 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 opposite sides in this embodiment and the following can be understood in the same way. This embodiment does not limit the parameters such as the shape, structure, and material of the first rotating member 30, as long as the first rotating member 30 can be rotatably connected to the base 10.

[0090] Optionally, the two first rotating members 30 are rotatably connected to the side of the base 10. Optionally, in one embodiment, the two first rotating members 30 are arranged axially symmetrically with respect to the base 10. In another embodiment, the two first rotating members 30 are arranged non-axially symmetrically with respect to the base 10, in other words, the two first rotating members 30 have a partially overlapping area in the thickness direction of the folding device 1. This embodiment is only schematically described with the two first rotating members 30 being arranged axially symmetrically with respect to the base 10.

[0091] The second rotating member 40 has the same function as the first rotating member 30. In the folding device 1, the folding function is mainly achieved through its ability to rotate, and the components connected to the two second rotating members 40 are driven and limited by the rotation of the two second rotating members 40, so that these components move according to a predetermined motion trajectory. The two second rotating members 40 are respectively rotatably connected to the opposite sides of the base 10, and the two second rotating members 40 are rotatably connected to one end of the base 10. This not only simplifies the structure of the folding device 1, but also enables the second rotating member 40 and the first rotating member 30 to be better rotatably connected to the base 10. In other words, the two second rotating members 40 are rotatably connected to the base 10 at one end close to the base 10. Since the base 10 is fixed, only the two second rotating members 40 rotate. This embodiment does not limit the parameters such as the shape, structure, and material of the second rotating member 40, as long as the second rotating member 40 can be rotatably connected to the base 10.

[0092] Optionally, the two second rotating members 40 are rotatably connected to the side of the base 10. Optionally, in one embodiment, the two second rotating members 40 are arranged axially symmetrically with respect to the base 10, and in another embodiment, the two second rotating members 40 are arranged asymmetrically with respect to the base 10, in other words, the two second rotating members 40 have a partially overlapping area in the thickness direction of the folding device 1. This embodiment is only schematically described with the two second rotating members 40 being arranged axially symmetrically with respect to the base 10.

[0093] The connecting member 50 mainly serves to connect various components in the folding device 1. One of each first rotating member 30 and each second rotating member 40 is rotatably connected to a connecting member 50, and the other is slidably connected to a connecting member 50. That is, each first rotating member 30 is rotatably connected to a connecting member 50, and the side of each first rotating member 30 away from the base 10 is rotatably connected to the connecting member 50. In other words, the first rotating member 30 can rotate relative to the connecting member 50. And each second rotating member 40 is slidably connected to a connecting member 50, that is, the side of each second rotating member 40 away from the base 10 is slidably connected to the connecting member 50, which can also be understood as the second rotating member 40 can slide relative to the connecting member 50. Alternatively, each first rotating member 30 is slidably connected to the connecting member 50, and each second rotating member 40 is rotatably connected to the connecting member 50. In addition, the connecting member 50 is also used to connect the shell later, so that the connecting member 50 and the shell are fixed together, so that when the shell rotates, the connecting member 50 can be driven to rotate together. This embodiment does not limit the shape, structure, material and other parameters of the connecting member 50, as long as the connecting member 50 can realize rotational connection with one rotating member and sliding connection with another rotating member. This embodiment is only schematically described by rotatably connecting each first rotating member 30 with one connecting member 50 and sliding connection with each second rotating member 40.

[0094] The first support member 60 has been described in detail above, and the present embodiment will not be described in detail here. Each first support member 60 is disposed on a connecting member 50. Specifically, the first support member 60 is rotatably connected to the connecting member 50, that is, the first support member 60 can rotate relative to the connecting member 50. And the first support member 60 is slidably and rotatably connected to the other of the first rotating member 30 and the second rotating member 40. The present embodiment is only schematically described by the first support member 60 being slidably and rotatably connected to a second rotating member 40. In other words, the first support member 60 can rotate relative to the second rotating member 40, and the first support member 60 can also slide relative to the second rotating member 40.

[0095] The folding device 1 provided in this embodiment can form a track mechanism 1b with the base 10, two first rotating members 30, two second rotating members 40, and two connecting members 50. In one embodiment, the folding device 1 includes a track mechanism 1b, which is arranged on one side of the first support member 60. In another embodiment, the folding device 1 includes two track mechanisms 1b, which are arranged on one side of the first support member 60, and the two track mechanisms 1b are arranged along the extension direction of the first support member 60. At this time, the first support member 60 is rotatably connected to the two connecting members 50, and is slidably and rotatably connected to the two second rotating members 40. In other embodiments, the folding device 1 includes three or more track mechanisms 1b, which are arranged on one side of the first support member 60, and are arranged along the extension direction of the first support member 60. At this time, the first support member 60 is rotatably connected to three or more connecting members 50, and is slidably and rotatably connected to three or more second rotating members 40. This embodiment is only schematically described by taking the folding device 1 as comprising three track mechanisms 1b and two first support members 60. Of course, the solution of two track mechanisms 1b and the solution of one track mechanism 1b should also fall within the protection scope of this application.

[0096] Based on the above connection relationship, it can be known that the folding device 1 provided in this embodiment is composed of 8 kinematic pairs on one side, specifically, the first rotating member 30 cooperates with the base 10 to form a rotating pair, the first rotating member 30 cooperates with the connecting member 50 to form a rotating pair, the second rotating member 40 cooperates with the base 10 to form a rotating pair, the second rotating member 40 cooperates with the connecting member 50 to form a sliding pair, the first supporting member 60 cooperates with the second rotating member 40 to form a rolling pair, and the first supporting member 60 cooperates with the connecting member 50 to form a rotating pair. Therefore, the total degree of freedom of the various components on one side to cooperate together is 3*4 (a total of 4 components on one side, such as 1 first rotating member 30, 1 second rotating member 40, 1 connecting member 50, and 1 first supporting member 60)-2*5 (a total of 5 low pairs on one side, such as 1 sliding pair and 4 rotating pairs)-1*1 (a total of 1 high pair on one side, such as 1 rolling pair) = 1. Since the second support member 70 is fixed on the first support member 60 , the second support member 70 and the first support member 70 can be equivalent to one component.

[0097] Therefore, when the folding device 1 moves, the movement trajectory and movement route of each component are unique. 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 first support member 60, and the first support member 60 also rotates relative to the connecting member 50, and finally the two first support members 60 are folded with each other. When the folding device 1 is unfolded, 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 first support member 60, and the first support member 60 also rotates relative to the connecting member 50, and finally the two first support members 60 are unfolded with each other.

[0098] The movement process of the folding device 1 mentioned above has a variety of active and passive logical relationships, and the present application uses one specific movement process as an example for illustration. When the folding device 1 is folded, that is, when the folding device 1 is in the process of changing 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 are both rotated to connect the base 10, the connecting member 50 can drive the first rotating member 30 and the second rotating member 40 to rotate relative to the base 10. And in the process of the first rotating member 30 and the second rotating member 40 rotating, the second rotating member 40 can also slide relative to the connecting member 50, that is, the connecting member 50 can slide along the second rotating member 40, thereby changing the distance between the connecting member 50 and the base 10. When the connecting member 50 slides, since the first support member 60 is arranged on the connecting member 50, the connecting member 50 can drive the first support member 60 to slide together. When the first support member 60 slides, the second rotating member 40 can also slide and rotate relative to the first support member 60, thereby driving the first support member 60 to rotate relative to the connecting member 50. Of course, in other embodiments, the first support member 60 may not rotate relative to the connecting member 50 during the sliding and rotating process of the second rotating member 40, that is, the first support member 60 and the connecting member 50 remain stationary, and finally the two first support members 60 can be folded with each other.

[0099] Similarly, when the folding device 1 is unfolded, that is, when the folding device 1 is in the process of changing from the folded state to the unfolded state, in other words, when the two connecting members 50 rotate in the opposite direction relative to the base 10 and move away from each other, since the first rotating member 30 and the second rotating member 40 are both rotated to connect the base 10, the connecting member 50 can drive the first rotating member 30 and the second rotating member 40 to rotate relative to the base 10. In addition, during the rotation of the first rotating member 30 and the second rotating member 40, the second rotating member 40 can also slide relative to the connecting member 50, that is, the connecting member 50 can slide along the second rotating member 40, thereby changing the distance between the connecting member 50 and the base 10. When the connecting member 50 slides, since the first supporting member 60 is disposed on the connecting member 50, the connecting member 50 can drive the first supporting member 60 to slide together. When the first supporting member 60 slides, the second rotating member 40 can also slide and rotate relative to the first supporting member 60, thereby driving the first supporting member 60 to rotate relative to the connecting member 50. Of course, in other embodiments, the first support member 60 may not rotate relative to the connecting member 50 during the sliding and rotating process of the second rotating member 40, that is, the first support member 60 and the connecting member 50 remain stationary, and finally the two first support members 60 can be unfolded to each other.

[0100] In other embodiments, the active and passive relationships of the above-mentioned multiple components can be reversed, for example, the first support member 60 can rotate 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 should also fall within the protection scope of this application.

[0101] like Fig.18 As shown, when the two first support members 60 are parallel to each other and are located on opposite sides of the base 10, the two first support members 60 are in a state of being fully unfolded relative to each other. In other words, the folding device 1 is in an unfolded state. Fig. 20 As shown in FIG. 1 , when the two first support members 60 are both located on one side of the base 10, it can also be understood that the two first support members 60 are both located on the top surface of the base 10. At this time, the two first support members 60 are in a state of being completely folded with each other. In other words, the folding device 1 is in a folded state. When the two first support members 60 are folded with each other, that is, the process of the folding device 1 from the unfolded state to the folded state can also be understood as the process from the unfolded state to the folded state. Figures 18 to 20 When the two first support members 60 are unfolded from each other, that is, the process of the folding device 1 from the folded state to the unfolded state can also be understood as the process from Figure 20 to Figure 18 process.

[0102] like Fig. 20 As shown, when the folding device 1 is in a folded state, the two first support members 60 and the base 10 are jointly enclosed to form a screen space 1a for accommodating the flexible screen. The folding device 1 provided in this embodiment can make the cross-sectional shape of the screen space 1a U-shaped or teardrop-shaped. When the cross-sectional shape of the screen space 1a is U-shaped, the distance between the two first support members 60 at the end away from the base 10 is equal to the distance between the two first support members 60 at the end close to the base 10. At this time, the structure of the folding device 1 is simple and the reliability of the whole machine is high. When the cross-sectional shape of the screen space 1a is teardrop-shaped, the distance between the two first support members 60 at the end away from the base 10 is less than the distance between the two first support members 60 at the end close to the base 10. At this time, after folding, the whole folding device 1 is thinner and flat. This embodiment is only schematically illustrated with the cross-sectional shape of the screen space 1a being teardrop-shaped.

[0103] The present application will now describe in detail the components that cooperate with each other. Since most components are two in number, this embodiment will only describe the components that cooperate with each other in detail. Fig.16 and Fig.17 The components on the right side of the base 10 in the folding device 1 are schematically illustrated, and the same understanding can be applied to the components on the left side of the base 10 .

[0104] Please refer to Fig.21In this embodiment, the first rotation axis C1 between the first rotating member 30 and the base 10 and the second rotation axis C2 between the second rotating member 40 and the base 10 are parallel to each other. The first rotation axis C1 is farther from the bottom surface 100 of the base 10 than the second rotation axis C2, and when the folding device 1 is in the unfolded state, the first rotation axis C1 is farther from the connecting member 50 than the second rotation axis C2. In other words, the first rotation axis C1 is higher and further to the left than the second rotation axis C2, so Fig.21 In the figure, the first rotation axis C1 is located at the upper left, and the second rotation axis C2 is located at the lower right. The first rotating member 30 moves in the form of rotation, which determines the position of the connecting member 50 during the movement. The second rotating member 40 moves in the form of rotation and sliding, which determines the angle of the connecting member 50 during the movement. The position and angle of the connecting member 50 are determined by the mutual cooperation between the first rotating member 30 and the second rotating member 40.

[0105] Specifically, when the first rotating member 30 and the second rotating member 40 rotate, the connecting member 50 can slide in a direction away from the base 10 when the folding device 1 is folded, based on the sliding of the connecting member 50 relative to the second rotating member 40. When the folding device 1 is unfolded, the connecting member 50 slides in a direction close to the base 10, so that the first support member 60 can be further moved according to a preset trajectory, so that when the folding device 1 is in a folded state, the folding device 1 forms a water drop-shaped screen space 1a. In this way, no matter whether the folding device 1 is folded or unfolded, when the connecting member 50 rotates relative to the base 10, the first rotating member 30 and the second rotating member 40 are also driven to rotate relative to the base 10, so that the connecting member 50 slides relative to the second rotating member 40, thereby changing the distance between the connecting member 50 and the base 10, driving the first support member 60 rotatably connected to the connecting member 50 to slide relative to the second rotating member 40, changing the distance between the first support member 60 and the base 10, and then realizing the subsequent movement process. In summary, in this embodiment, no new components need to be added, and the sliding of the connecting member 50 relative to the second rotating member 40 can be achieved only by designing the positions of the first rotating axis C1 and the second rotating axis C2 .

[0106] In this embodiment, the first rotating member 30 and the base 10 are connected by the first circular arc rail and the first circular arc groove. The first circular arc rail is provided on one of the first rotating member 30 and the base 10, and the first circular arc groove is provided on one of the first rotating member 30 and the base 10. For example, when the first circular arc rail is provided on the first rotating member 30, the first circular arc groove is provided on the base 10. When the first circular arc groove is provided on the first rotating member 30, the first circular arc rail is provided on the base 10. This embodiment is only schematically described with the first circular arc rail provided on the first rotating member 30 and the first circular arc groove provided on the base 10. Specifically, a circular arc block is provided on one side of the first rotating member 30 close to the base 10, and the block is the first circular arc rail. The base 10 is provided with a protrusion, and an arc-shaped groove body is provided in the protrusion, and the groove body is the first arc groove. The first arc track is provided in the first arc groove, and the axis of the first arc groove is colinear with the axis of the first arc track, so that the first rotating member 30 can rotate relative to the base 10. In other words, the first rotating member 30 and the base 10 can be rotatably connected together through the arc slide rail and the arc slide groove.

[0107] As for the size and curvature of the first arc groove and the first arc track, they can be designed according to the position of the rotation axis between the first rotating member 30 and the base 10. The design of the first arc groove and the first arc track can make the position of the rotation axis inside the base 10 or outside the base 10. By adjusting the size and curvature of the first arc groove and the first arc track, the position of the rotation axis can be better designed, thereby achieving the above-mentioned positional relationship between the rotation axis and the rotation axis. Of course, in other embodiments, the first arc groove can also be provided on the first rotating member 30, and the first arc track can be provided on the base 10.

[0108] In summary, the present embodiment can better adjust the position of the rotation axis by adopting the rotation connection scheme of the first arc groove and the first arc rail, so as to achieve the purpose of making the rotation axis parallel to each other, so that the first rotation axis C1 and the second rotation axis C2 meet the above position relationship. In addition, the matching form of the first arc groove and the first arc rail makes it possible to change the distance from the end of the first rotation member 30 away from the base 10 to the base 10 when the first rotation member 30 rotates relative to the base 10, thereby adjusting the distance between the first rotation member 30 and the base 10, and further achieving the purpose of controlling the first support member 60 to slide relative to the base 10.

[0109] In this embodiment, the second rotating member 40 and the base 10 are connected by the first rotating shaft and the first rotating hole, the first rotating shaft is provided at one of the second rotating member 40 and the base 10, and the first rotating hole is provided at the other of the second rotating member 40 and the base 10. Since the second rotating member 40 is rotatably connected to the base 10, in this embodiment, the second rotating member 40 and the base 10 can be connected by the first rotating shaft and the first rotating hole, the first rotating shaft is provided at one of the second rotating member 40 and the base 10, and the first rotating hole is provided at the other of the second rotating member 40 and the base 10. For example, when the first rotating shaft is provided at the second rotating member 40, the first rotating hole is provided at the base 10. When the first rotating hole is provided at the second rotating member 40, the first rotating shaft is provided at the base 10. In this embodiment, the first rotating shaft is provided at the base 10 and the first rotating hole is provided at the second rotating member 40 for schematic illustration. Optionally, the first rotating shaft includes but is not limited to a rotating shaft.

[0110] From the above content, it can be known that since the first rotating member 30 and the base 10 can be matched through the first arc groove and the first arc track, the position of the rotation axis between the first rotating member 30 and the base 10 can be changed by designing the curvature and size of the first arc groove and the first arc track. Therefore, there is no need to change the position of the rotation axis between the second rotating member 40 and the base 10, and only the first rotating shaft and the first rotating hole can be used to match, thereby simplifying the structure of the folding device 1.

[0111] In this embodiment, the first rotating member 30 and the connecting member 50 are connected by the second rotating shaft and the second rotating hole, the second rotating shaft is provided at one of the first rotating member 30 and the connecting member 50, and the second rotating hole is provided at the other of the first rotating member 30 and the connecting member 50. Since the first rotating member 30 is rotatably connected to the connecting member 50, the first rotating member 30 and the connecting member 50 can be connected by the second rotating shaft and the second rotating hole in this embodiment, the second rotating shaft is provided at one of the first rotating member 30 and the connecting member 50, and the second rotating hole is provided at the other of the first rotating member 30 and the connecting member 50. For example, when the second rotating shaft is provided at the first rotating member 30, the second rotating hole is provided at the connecting member 50. When the second rotating hole is provided at the first rotating member 30, the second rotating shaft is provided at the connecting member 50. This embodiment is only schematically described with the second rotating shaft provided at the connecting member 50 and the second rotating hole provided at the first rotating member 30. Optionally, the second rotating shaft includes but is not limited to a pin.

[0112] From the above content, it can be known that when the connecting member 50 rotates relative to the base 10 and drives the first rotating member 30 and the second rotating member 40 to rotate relative to the base 10, the connecting member 50 will also slide relative to the second rotating member 40. Therefore, the distance between the connecting member 50 and the base 10 will change, and the distance between the connecting member 50 and the first rotating member 30 will also change. However, since the first rotating member 30 is rotatably connected to the base 10, the first rotating member 30 cannot move. Therefore, in order to avoid interference during movement, the first rotating member 30 can be rotatably connected to the connecting member 50. When the connecting member 50 slides relative to the second rotating member 40, the first rotating member 30 also rotates relative to the connecting member 50 to compensate for the distance when the connecting member 50 slides, ensuring the smoothness of the movement of the folding device 1.

[0113] Please refer to Fig.17 and Fig. 22 In this embodiment, the second rotating member 40 and the connecting member 50 are connected by means of a sliding block 42 and a sliding groove 52. The sliding block 42 is provided at one of the second rotating member 40 and the connecting member 50, and the sliding groove 52 is provided at the other of the second rotating member 40 and the connecting member 50. The connecting member 50 has a back surface 500 for facing away from the flexible screen, and the distance between the end of the sliding block 42 close to the base 10 and the back surface 500 is smaller than the distance between the end of the sliding block 42 away from the base 10 and the back surface 500.

[0114] The sliding block 42 is not arranged horizontally but inclined, and the farther the sliding block 42 is from the base 10, the greater the distance between the sliding block 42 and the back 500. Since the sliding block 42 is arranged inclined, the sliding groove 52 is also arranged inclined to match the sliding block 42, and the distance between the end of the sliding groove 52 close to the base 10 and the back 500 is smaller than the distance between the end of the sliding groove 52 away from the base 10 and the back 500. When the folding device 1 is changed from the unfolded state to the folded state, the connecting member 50 slides relative to the second rotating member 40 in the direction away from the base 10. By designing the shapes of the sliding block 42 and the sliding groove 52, not only the first support member 60 can be further moved according to the preset trajectory, so that the folding device 1 forms a water drop-shaped screen space 1a when the folding device 1 is in the folded state. When the two connecting members 50 slide in the direction away from the base 10, the two connecting members 50 also approach each other, so that when the folding device 1 is in the folded state, the distance between the two connecting members 50 can be reduced, and the thickness of the folding device 1 in the folded state can be reduced. The two opposite ends of the flexible screen can also be made to abut against each other, thereby eliminating the gap between the two ends of the flexible screen when in a folded state, thereby improving the safety performance of the flexible screen and improving the appearance effect.

[0115] Please refer to Figure 23-Figure 25In this embodiment, the first support member 60 includes a support portion 61 and a rolling portion 62. The support portion 61 has a support surface 600 for supporting the flexible screen. The rolling portion 62 is disposed on a side of the support portion 61 away from the support surface 600. The second rotating member 40 and the rolling portion 62 are connected by a first rolling shaft 43 and a first rolling groove 620. The first rolling shaft 43 is disposed on one of the second rotating member 40 and the rolling portion 62. The first rolling groove 620 is disposed on the other of the second rotating member 40 and the rolling portion 62. The first rolling groove 620 has a first limiting end 621 and a second limiting end 622 that are disposed opposite to each other. The first limiting end 621 is farther away from the base 10 than the second limiting end 622, and the first limiting end 621 is farther away from the support surface 600 than the second limiting end 622. When the folding device 1 is in the unfolded state, the first rolling shaft 43 is positioned at the first limit end 621 , and when the folding device 1 is in the folded state, the first rolling shaft 43 is positioned at the second limit end 622 .

[0116] The first limit end 621 is farther from the base 10 than the second limit end 622, and the first limit end 621 is farther from the support surface 600 than the second limit end 622. In other words, the first limit end 621 is further to the right and lower than the second limit end 622, that is, the first limit end 621 is located at the lower right position, and the second limit end 622 is located at the upper left position. During the movement of the folding device 1, when the folding device 1 is in the unfolded state, the first rolling axis 43 is positioned at the first limit end 621 to prevent the first support member 60 from folding back and damaging the subsequent flexible screen. When the folding device 1 is in the folded state, the first rolling axis 43 is positioned at the second limit end 622 to prevent the first support member 60 from folding back and damaging the subsequent flexible screen. It can also be understood that when the folding device 1 is in the unfolded state, the first rolling axis 43 is located at the lower right, and when the folding device 1 is in the folded state, the first rolling axis 43 is located at the upper left.

[0117] The first rolling groove 620 also has a first connecting portion 623 connecting the first limiting end 621 and the second limiting end 622. The first connecting portion 623 protrudes in the direction away from the support surface 600, so that the position of the first rolling shaft 43 in the first rolling groove 620 can be controlled during the entire movement process, thereby controlling the positional relationship between the rotation axis between the first support member 60 and the connecting member 50 and the first rolling shaft 43, so that the first support member 60 is rotated to form a water drop shape in the folded state. In addition, the arc-shaped first rolling groove 620 can also make the rolling of the first rolling shaft 43 smoother, thereby improving the smoothness and stability of the movement of the folding device 1. Of course, in other embodiments, the shape of the first connecting portion 623 can also be a straight line, or other shapes, as long as the positions of the first limiting end 621 and the second limiting end 622 meet the above-mentioned positional relationship.

[0118] The first rolling groove 620 also has a second connecting portion 624 connecting the first connecting portion 623 and the first limiting end 621, and the extension direction of the second connecting portion 624 is parallel to the support surface 600. In the process of the folding device 1 from the unfolded state to the folded state, the first rolling shaft 43 does not move directly from the first limiting end 621 to the second connecting portion 624, but first moves to the second connecting portion 624 and then moves to the first connecting portion 623. In this way, when the folding device 1 is in the unfolded state, the horizontal second connecting portion 624 can be used to support the first rolling shaft 43, and the second connecting portion 624 can be used to achieve buffering, so as to prevent the first rolling shaft 43 from moving from the first limiting end 621 to the arc-shaped first connecting portion 623 by itself, thereby improving the stability of the folding device 1. In addition, the horizontally arranged second connecting portion 624 can also reduce the gap between the first rolling shaft 43 and the first rolling groove 620 to prevent the existence of a virtual position.

[0119] In this embodiment, the first support member 60 and the connecting member 50 are connected by the third arc track and the third arc groove, the third arc track is provided at one of the first support member 60 and the connecting member 50, and the third arc groove is provided at the other of the first support member 60 and the connecting member 50. Since the first support member 60 is rotatably connected to the connecting member 50, the first support member 60 and the connecting member 50 can be connected by the third arc track and the third arc groove in this embodiment, the third arc track is provided at one of the first support member 60 and the connecting member 50, and the third arc groove is provided at the other of the first support member 60 and the connecting member 50. For example, when the third arc track is provided at the first support member 60, the third arc groove is provided at the connecting member 50. When the third arc groove is provided at the first support member 60, the third arc track is provided at the connecting member 50. This embodiment is only schematically described by providing the third arc groove at the first support member 60 and the third arc track at the connecting member 50.

[0120] Specifically, the first support member 60 includes a support portion 61 and a rotating portion, wherein the support portion 61 is used to support the flexible screen when the folding device 1 is applied to an electronic device. Therefore, the support portion 61 has a support surface 600 for supporting the flexible screen, that is, the upper surface of the support portion 61 is the support surface 600. The rotating portion is arranged on the side of the support portion 61 away from the support surface 600, that is, the rotating portion is farther away from the flexible screen than the support portion 61. A circular arc groove is provided on the side of the rotating portion close to the connecting member 50, and the groove is the third circular arc groove. A circular arc block is provided on the side of the connecting member 50 close to the rotating portion, and the block is the third circular arc rail. The third circular arc rail can be arranged in the third circular arc groove, and the axis of the third circular arc groove is colinear with the axis of the third circular arc rail, so that the rotating portion of the first support member 60 can rotate relative to the connecting member 50. As for the size and curvature of the third circular arc groove and the third circular arc rail, they can be designed according to the position of the rotation axis between the first support member 60 and the connecting member 50. In addition, it can be known from the above content that in this embodiment, the first support member 60 can be rotated relative to the connecting member 50 by changing the position between the rotation axis and the rolling axis between the first support member 60 and the connecting member 50. Therefore, the design of the circular arc groove and the circular arc track can make the position of the rotation axis inside the connecting member 50 or outside the connecting member 50, and the position and shape of the rolling axis and the rolling groove can be better designed by adjusting the size and curvature of the third circular arc groove and the third circular arc track, so that the first support member 60 can be rotated relative to the connecting member 50. Of course, in other embodiments, the third circular arc track can also be provided on the first support member 60, and the third circular arc groove can also be provided on the connecting member 50.

[0121] Optionally, in one embodiment, the connecting member 50 may have a third circular arc track, which is disposed on one side of the connecting member 50. Correspondingly, the first support member 60 has a rotating portion and a third circular arc groove. In another embodiment, the connecting member 50 may have two third circular arc tracks, which are disposed on opposite sides of the connecting member 50. Correspondingly, the first support member 60 has two rotating portions and a third circular arc groove. This embodiment is only schematically described by taking the connecting member 50 having two third circular arc tracks and the first support member 60 having two third circular arc grooves.

[0122] In this embodiment, the connecting member 50 and the first support member 60 are connected by a constraint shaft and a constraint hole. The constraint shaft is provided at one of the connecting member 50 and the first support member 60, and the constraint hole is provided at the other of the connecting member 50 and the first support member 60. When the constraint shaft is provided at the connecting member 50, the constraint hole is provided at the first support member 60. When the constraint hole is provided at the connecting member 50, the constraint shaft is provided at the first support member 60. In this embodiment, the constraint shaft is provided at the connecting member 50 and the constraint hole is provided at the first support member 60 for schematic illustration. Specifically, a cylindrical column is provided at the end of the connecting member 50, and the column is the constraint shaft. The first support member 60 includes a support portion 61 and a constraint portion fixed to the support portion 61 away from the support surface 600. A groove is provided on the side of the constraint portion facing the constraint shaft, and the groove is the constraint groove. The constraint shaft can be inserted into the constraint groove so that the connecting member 50 and the first support member 60 can achieve constraint matching. Of course, in other embodiments, the restraining shaft may also be provided on the first support member 60 , and the restraining hole may also be provided on the connecting member 50 .

[0123] The constraint axis and the constraint hole can cooperate with each other to prevent the folding device 1 from having movement deviation during movement, causing the first support member 60 to rotate excessively relative to the first rotating member 30 and then warp, which will affect the fold of the flexible screen. In other words, this embodiment limits the movement trajectory of the inclined plate by adding a virtual constraint between the first rotating member 30 and the second rotating member 40, but the constraint axis and the constraint hole do not affect the degree of freedom of the folding device 1.

[0124] In summary, the folding device 1 provided in this embodiment can ultimately control the motion trajectory of the first support member 60 and further control the motion trajectory of the second support member 70 through the cooperation among the first rotating member 30 , the second rotating member 40 , and the connecting member 50 .

[0125] Please refer to Fig.17 and Fig.26 In this embodiment, at least one of the two first rotating members 30 and the two second rotating members 40 has a receiving groove 400, and the groove wall of the receiving groove 400 at two opposite ends along the axial direction of the first rotating member 30 and the second rotating member 40 has two first helical surfaces 401. The folding device 1 also includes a synchronous member 81, at least a portion of the synchronous member 81 is disposed in the receiving groove 400, and the synchronous member 81 has two second helical surfaces 810 at two opposite ends along the axial direction that abut against the two first helical surfaces 401, so that at least one of the two first rotating members 30 and the two second rotating members 40 can rotate in opposite directions synchronously with each other.

[0126] In this embodiment, the receiving groove 400 can be set at one end of the two first rotating members 30 rotatably connected to the base 10, or the receiving groove 400 can be set at one end of the two second rotating members 40 rotatably connected to the base 10, or the receiving groove 400 can be set at one end of the two first rotating members 30 and the two second rotating members 40 rotatably connected to the base 10. In other words, the first rotating members 30 and / or the second rotating members 40 on the left and right sides are both provided with the receiving groove 400, and this embodiment is only schematically described by the two second rotating members 40 being provided with the receiving groove 400. And along the axial direction of the first rotating member 30 and / or the second rotating member 40, the groove walls at the opposite ends of the receiving groove 400 are both provided with the first helical surface 401. At least part of the synchronizer 81 can be arranged in the receiving groove 400, and the opposite ends of the synchronizer 81 in the axial direction, that is, the surfaces corresponding to the two first helical surfaces 401, are provided with the second helical surface 810, and the second helical surface 810 and the first helical surface 401 are mutually abutted.

[0127] When the folding device 1 moves, a second rotating member 40 rotates relative to the base 10 to rotate the first helical surface 401, thereby driving the second helical surface 810 matched with the first helical surface 401 to slide, and then the synchronous member 81 slides in the axial direction. When the synchronous member 81 slides, the second helical surface 810 on the other side of the synchronous member 81 also slides, thereby driving the first helical surface 401 and the second helical surface 810 matched with the second helical surface 810 to rotate, and then the other second rotating member 40 rotates synchronously and in the opposite direction compared to the first second rotating member 40, so as to achieve the effect of synchronous driving of the left and right sides of the folding device 1.

[0128] Optionally, the second rotating member 40 is sleeved on the rotating shaft 82, and the rotating shaft 82 is arranged on the base 10 and the rotating shaft 82 can be fixed on the base 10 by welding, gluing, interference fit, etc., or the rotating shaft 82 can also rotate relative to the base 10. The synchronous member 81 can also be sleeved on the rotating shaft 82 to further improve the sliding accuracy and stability. Of course, in other embodiments, the synchronous member 81 may not be sleeved on the rotating shaft 82, and only rely on the two second helical surfaces 810 of the synchronous member 81 to abut against the two first helical surfaces 401 of the second rotating member 40 for fixation.

[0129] Optionally, the synchronizer 81 may be an integrated structure or a split structure. Since the synchronizer 81 is used in this embodiment to achieve the synchronization effect, the synchronizer 81 has a smaller thickness dimension than the four-gear synchronization scheme in the related art, which can effectively reduce the thickness of the entire folding device 1. The base 10 can cross the synchronizer 81 in the axial direction to achieve the integration of the base 10, that is, the base 10 can be an integrated structure, thereby improving the strength of the folding device 1 and the reliability in the event of a fall or the like.

[0130] Please refer again Fig. 27 In this embodiment, the synchronizer 81 includes a first sub-synchronizer 811, a second sub-synchronizer 812, and an elastic member 813 that is compressed and supported between the first sub-synchronizer 811 and the second sub-synchronizer 812, wherein one second helical surface 810 is disposed on a side of the first sub-synchronizer 811 that is away from the second sub-synchronizer 812, and the other second helical surface 810 is disposed on a side of the second sub-synchronizer 812 that is away from the first sub-synchronizer 811.

[0131] When the synchronizer 81 is a split structure, the synchronizer 81 may include a first sub-synchronizer 811, a second sub-synchronizer 812, and an elastic member 813. The side surface of the first sub-synchronizer 811 close to one first helical surface 401 is a second helical surface 810, and the side surface of the second sub-synchronizer 812 close to another first helical surface 401 is another second helical surface 810. The elastic member 813 is held between the first sub-synchronizer 811 and the second sub-synchronizer 812 and is always in a compressed state. The synchronization effect can also be achieved by using the split first sub-synchronizer 811 and the second sub-synchronizer 812, and the elastic member 813 in a compressed state can make the second helical surfaces 810 of the first sub-synchronizer 811 and the second sub-synchronizer 812 always tightly hold the first helical surface 401 of the second rotating member 40, so as to compensate for the error caused by the gap generated during the movement between the first sub-synchronizer 811, the second sub-synchronizer 812, and the second rotating member 40.

[0132] Please refer to Figure 27-Figure 28 The shell assembly 2 provided in this embodiment includes a first shell 91, a second shell 92, and a folding device 1 provided in the above embodiment of the present application, and the folding device 1 is connected between the first shell 91 and the second shell 92.

[0133] The housing assembly 2 is a combined component, that is, the housing assembly 2 includes at least two components. In this embodiment, the housing assembly 2 mainly includes two housings and the folding device 1 provided in the above embodiment of the present application. The first housing 91 and the second housing 92 are mainly used to install and carry components. For example, a flexible screen can be carried on the first housing 91 and the second housing 92, and functional modules such as batteries, PCB components, speakers, receivers, buttons, etc. can be set in the first housing 91 and the second housing 92. Therefore, the first housing 91 and the second housing 92 mainly play the role of installation and protection. In some embodiments, the surface of the first housing 91 and the second housing 92 can also serve as an appearance surface, so the surface of the first housing 91 and the second housing 92 can be designed accordingly, so that the first housing 91 and the second housing 92 have a unique appearance effect. This embodiment does not limit the parameters such as the shape, material, structure, etc. of the first housing 91 and the second housing 92, as long as the installation and protection functions can be achieved. For example, the material of the first housing 91 and the second housing 92 can be all metal, or all plastic, or partly metal and partly plastic.

[0134] One connecting member 50 of the folding device 1 is connected to the first shell 91, and the other connecting member 50 is connected to the second shell 92, so that when the first shell 91 and the second shell 92 rotate, the two connecting members 50 are driven to rotate relative to the base 10, thereby realizing the subsequent movement process. For example, the movement of the first rotating member 30, the second rotating member 40, and the first supporting member 60, and the relative movement of the first moving member and the second moving member provide damping for the movement of the shell assembly 2. Optionally, the shell and the connecting member 50 can be fixed by screws, buckles, or glue.

[0135] The shell assembly 2 provided in this embodiment, by adopting the folding device 1 provided in the above embodiment of the present application, can support the flexible screen in the unfolded state, and at the same time can increase the screen capacity space 1a of the flexible screen in the folded state, thereby reducing the stress of the flexible screen and increasing the service life of the flexible screen.

[0136] Please refer to Figure 29-Figure 30 The electronic device 3 provided in this embodiment includes a flexible screen 93 and a shell assembly 2 provided in the above embodiment of the present application. The flexible screen 93 is arranged on the same side of the first shell 91, the second shell 92, and the folding device 1.

[0137] The electronic device 3 provided in this embodiment includes but is not limited to mobile terminals such as mobile phones, tablet computers, laptop computers, PDAs, personal computers (PCs), personal digital assistants (PDAs), portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers. The mobile phone is used as an example for schematic illustration.

[0138] The electronic device 3 includes a flexible screen 93 and a shell assembly 2. The flexible screen 93 is a component with a certain flexibility. Compared with a rigid component, the flexible screen 93 can be bent to a certain extent. For example, the flexible screen 93 includes but is not limited to various flexible components with corresponding functions such as a flexible display screen, a flexible touch screen, and a flexible touch display screen, or a flexible component fixedly bonded with a flexible support plate, such as a flexible display screen and a flexible touch screen bonded with a flexible steel plate. The flexible screen 93 is arranged on the same side of the first shell 91 and the second shell 92 in the shell assembly 2, and can be bent or flattened with the shell assembly 2. Specifically, the flexible screen 93 has a bending area 930 and non-bending areas 931 arranged on opposite sides of the bending area 930. The bending area 930 is arranged corresponding to the second support member 70 of the bonding and folding device 1, and the non-bending area 931 is fixedly arranged on the first shell 91 and the second shell 92. Since the flexible screen 93 in the bending area 930 is correspondingly attached to the second support member 70 of the folding device 1, the shape of the folding device 1 changes when it moves, so it can drive the flexible screen 93 in the bending area 930 to bend as well, thereby bending or flattening with the movement of the electronic device 3. Since the non-bending area 931 is fixed on the first shell 91 and the second shell 92, the first shell 91 and the second shell 92 can only rotate relative to each other, and the shape itself will not change. Therefore, even if the first shell 91 and the second shell 92 rotate, the flexible screen 93 on the first shell 91 and the second shell 92 will not bend.

[0139] The electronic device provided in this embodiment, by adopting the shell assembly provided in the above embodiment of the present application, can support the flexible screen in the unfolded state, and at the same time can increase the screen capacity space of the flexible screen in the folded state, reduce the stress of the flexible screen, and increase the service life of the flexible screen.

[0140] In the description of the present application, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0141] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0142] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated. It can be mechanically connected or electrically connected. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0143] The above describes the contents provided by the implementation methods of the present application in detail, and describes and illustrates the principles and implementation methods of the present application. These descriptions are only used to help understand the method and its core ideas of the present application. However, the contents of this specification should not be construed as limiting the present application, and those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. These modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents.

Claims

1. A folding device, characterized in that: include: Pedestal; Two first support members, the two first support members are respectively arranged on opposite sides of the base and can move relative to the base; as well as Two second support members, each of which is fixed to a support surface of one of the first support members and extends beyond an edge of the first support member close to the base; When the folding device is in an unfolded state, there is a distance between the two second support members, and a portion of each of the second support members is arranged corresponding to the gap between the two first support members.

2. The folding device according to claim 1, characterized in that: The second supporting member includes a first supporting layer and a second supporting layer which are stacked, the first supporting layer has a bonding surface connected to the supporting surface, and the second supporting layer is bonded to the bonding surface and can be arranged corresponding to the gap.

3. The folding device according to claim 2, characterized in that: When the folding device is folded, the two first support members approach each other, and the shape of the second support member remains unchanged, or each of the second support members can be bent in a direction away from the other second support member.

4. The folding device according to claim 3, characterized in that: When the folding device is folded, the second supporting layer can abut against the base to bend the first supporting layer.

5. The folding device according to claim 4, characterized in that: The second supporting member further includes a third supporting layer bonded to the supporting surface and the bonding surface. The third supporting layer and the second supporting layer are arranged in the same layer with a gap therebetween. The thickness of the third supporting layer is less than that of the second supporting layer.

6. The folding device according to claim 5, characterized in that: The third supporting layer includes a first part and a second part arranged along the arrangement direction of the third supporting layer and the second supporting layer, and the second supporting member also includes a first bonding layer bonded between the first part and the first supporting layer, a second bonding layer bonded between the second supporting layer and the first supporting layer, and a filling layer, one side of the filling layer is bonded to the second part, and the other side can support the first supporting layer, and the thickness of the filling layer is the same as that of the first bonding layer.

7. The folding device according to claim 6, characterized in that: The first supporting layer includes a plurality of bending holes arranged in an array, and when the folding device is in the unfolded state, the filling layer and the second part cover at least part of the plurality of bending holes.

8. The folding device according to claim 7, characterized in that: The bending hole includes an extension hole along the extension direction of the first supporting layer and an arc hole connected to at least one end of the extension hole.

9. The folding device according to claim 6, characterized in that: A first avoidance hole is provided on a side of each first support member close to another first support member, a second avoidance hole connected to the first avoidance hole is provided on the third support layer, and the orthographic projection of the filling layer on the third support layer is located outside the second avoidance hole.

10. The folding device according to any one of claims 1 to 9, characterized in that: The folding device also includes: Two first rotating members are rotatably connected to opposite sides of the base respectively; Two second rotating members, respectively rotatably connected to opposite sides of the base; and A connecting member, wherein one of the first rotating member and the second rotating member located on the same side of the base is rotatably connected to the connecting member, and the other is slidably connected to the connecting member; Each of the first supporting members is rotatably connected to one of the connecting members, and is slidably and rotatably connected to the other of the first rotating member and the second rotating member.

11. A housing assembly, characterized in that: The shell assembly includes a first shell, a second shell, and a folding device as described in any one of claims 1 to 10, and the folding device is connected between the first shell and the second shell.

12. An electronic device, characterized in that: The electronic device comprises a flexible screen and a housing assembly as claimed in claim 11, wherein the flexible screen is arranged on the same side of the first housing, the second housing, and the folding device.

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