WO2021184654A1 - 一种转轴机构及可折叠终端设备 - Google Patents

一种转轴机构及可折叠终端设备 Download PDF

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Publication number
WO2021184654A1
WO2021184654A1 PCT/CN2020/108502 CN2020108502W WO2021184654A1 WO 2021184654 A1 WO2021184654 A1 WO 2021184654A1 CN 2020108502 W CN2020108502 W CN 2020108502W WO 2021184654 A1 WO2021184654 A1 WO 2021184654A1
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WO
WIPO (PCT)
Prior art keywords
middle frame
support
rotating
main
rotation
Prior art date
Application number
PCT/CN2020/108502
Other languages
English (en)
French (fr)
Inventor
廖常亮
钟鼎
黄涛
刘勇
林杨明
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN202090000119.8U priority Critical patent/CN214247984U/zh
Priority to KR1020227035568A priority patent/KR20220154188A/ko
Priority to JP2022556504A priority patent/JP7470811B2/ja
Priority to EP20925461.4A priority patent/EP4108940A4/en
Publication of WO2021184654A1 publication Critical patent/WO2021184654A1/zh
Priority to US17/947,396 priority patent/US20230019951A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0217—Mechanical details of casings
    • H05K5/0226—Hinges

Definitions

  • This application relates to the field of terminal equipment, and in particular to a shaft mechanism and foldable terminal equipment.
  • the flexible screen is only a part of its structure.
  • the cooperation of the hinge mechanism is required.
  • screen sliding type means that the flexible screen will slide on the structural member with the movement of the hinge mechanism during the folding process.
  • the structure of the structural member is not stable enough and will exert a certain pulling force on the flexible screen.
  • the fixed screen is that the flexible screen is relatively fixed to the structural parts of the device.
  • the hinge mechanism of the device changes in accordance with the change of the flexible screen during the folding process. The reflex ability is poor, and it is easy to damage the flexible display screen.
  • the current hinge mechanisms used for folding and unfolding the flexible screen have the problem of structural instability, and there is a risk of damaging the flexible display screen during the folding and unfolding process.
  • the present application provides a hinge mechanism and a foldable terminal device.
  • the hinge mechanism can have a good supporting effect on the flexible display screen in the foldable terminal device and can reduce the risk of failure of the flexible display screen.
  • this application provides a hinge mechanism, which can be applied to a foldable terminal device, and the foldable terminal device may be a foldable mobile phone or a foldable tablet computer.
  • the rotating shaft mechanism includes a main support and at least one rotating component, wherein the main support is equivalent to providing bearing and support for the entire structure, and each rotating component can rotate relative to the main support, so as to achieve the folding or unfolding effect of the rotating component relative to the main support;
  • a limit structure for limiting the maximum rotation distance of the rotating assembly relative to the main support is also provided between the main support and the rotating assembly.
  • a first rotation center and a second rotation center are formed on the main support, and each rotating component includes a rotating part, a sliding part, and a middle frame.
  • the third rotation center, the axis of the first rotation center, the axis of the second rotation center, and the axis of the third rotation axis are parallel to each other;
  • the main body part between the two connecting parts, the first connecting part is rotatably connected to the main bracket around the first rotation center, so the rotating member can rotate relative to the main bracket around the first rotation center; the second connecting part can rotate around the third
  • the center is rotatably connected with the middle frame.
  • the middle frame can rotate relative to the rotating part around the third rotation center; one end of the sliding part can be connected to the main support rotatably around the second rotation center.
  • the sliding part can be hinged to the main frame.
  • the rotating member can rotate relative to the main frame around the first center of rotation
  • the middle frame can rotate relative to the rotating member around the third center of rotation
  • one end of the sliding member can rotate relative to the main frame around the second center of rotation
  • the other end of the sliding member can be relative to the middle frame Therefore, the degree of freedom of the entire rotating shaft mechanism is limited to only one degree of freedom, and finally the middle frame can rotate relative to the main frame to achieve folding and unfolding effects; when the rotating assembly is in the unfolded state relative to the main frame, the bearing surface of the main frame is The bearing surfaces of the middle frame are on the same plane.
  • the entire hinge mechanism has a simple structure and a small virtual position and high stability; when the hinge mechanism is applied to a foldable terminal device, the bearing surface of the main bracket and the bearing surface of the middle frame are used to bear the flexible display of the foldable terminal device
  • the flexible display screen can have a good supporting effect on the flexible display screen.
  • the flexible display screen of the foldable terminal device will not be opposed to the rotating shaft mechanism during the folding and unfolding process. Sliding can reduce the risk of failure of the flexible display.
  • the above-mentioned rotating member is realized in two connected arc-shaped structures.
  • the first connecting portion and the second connecting portion of the rotating member are both arc-shaped structures, and the concave surface of the first connecting portion
  • the concave surface of the second connecting portion and the second connecting portion are both facing the bearing surface side of the middle frame.
  • the positions of the first connecting portion and the second connecting portion are equivalent to left-right symmetry (of course, the structure is not necessarily the same symmetrically); wherein, the first connecting portion corresponds to The center of the circle coincides with the above-mentioned first rotation center, and the center of the circle corresponding to the second connection part coincides with the third rotation center; a first arc-shaped sliding groove is formed on the main support, and the first connecting part extends into the first arc-shaped sliding groove In a sliding fit with the first arc-shaped sliding groove, when the first connecting portion slides along the first arc-shaped sliding groove, the rotating member is equivalent to rotating relative to the main frame around the first rotation center relative to the main frame; and the middle frame is formed with The second arc-shaped chute, the second connecting part extends into the second arc-shaped chute to slidably fit with the second arc-shaped chute.
  • the middle frame is equivalent to relative rotation During the rotation of the middle frame relative to the main frame, the first connecting part does not protrude from the bearing surface of the main frame, and the second connecting part does not protrude from the bearing surface of the middle frame, so that the shaft mechanism When in the folded state, the rotating member will not affect the external structure of the rotating shaft mechanism, and the rotating shaft mechanism can also be more conveniently applied to the foldable terminal device.
  • a first screen support is also provided on the rotating part, which can be It is used to support external structures such as flexible display screens.
  • the first screen support member here can be fixed on the rotating member by means of bonding, welding, riveting, threaded connection and the like.
  • a second screen support is movably arranged between the first screen support and the main support, and a second screen support can also be movably arranged between the first screen support and the middle frame
  • the second screen support and the third screen support can also be used to support the external structure.
  • the above-mentioned second screen support is movable.
  • the first screen support and the main support may cooperate to form an overlapping surface.
  • the support is overlapped on the overlapping surface; similarly, for the second screen support arranged between the first screen support and the middle frame, the first screen support and the middle frame cooperate to form the overlapping surface, and the second The screen support is overlapped on the overlap surface.
  • the limiting structure of the rotating shaft mechanism can limit the maximum stroke of the rotating assembly relative to the main support.
  • the limiting structure of the rotating shaft mechanism can include forming on the main frame. The first limiting surface on the bracket and the second limiting surface formed on the middle frame, when the rotating assembly rotates relative to the main bracket to a folded state, the first limiting surface and the second limiting surface contact and interfere.
  • the limiting structure further includes a limiting member that can be set between the main support and the middle frame. When the rotating assembly rotates relative to the main support to In the unfolded state, the stopper contacts and interferes with the main support and the rotating assembly.
  • the limiting structure is not limited to the above manner, and will not be repeated here.
  • this application provides a foldable terminal device.
  • the foldable terminal device may be a foldable mobile phone, a foldable tablet computer, etc.; the foldable terminal device may specifically include a flexible display screen and any of the above-mentioned hinge mechanisms
  • the flexible display screen is arranged on the bearing surface of the main bracket and the bearing surface of the middle frame. When the rotating assembly is folded or unfolded relative to the main bracket, the flexible display screen will be folded and unfolded accordingly.
  • a rotating shaft mechanism with at least two rotating components is proposed.
  • Each rotating component can rotate the rotating component relative to the main support, and at least two rotating components can cooperate with the main support to realize multiple folding modes. Divide at least two rotating components into two groups: a first rotating combination and a second rotating combination.
  • the rotating actions of each rotating component in the first rotating combination are synchronized; and the rotation of each rotating component in the second rotating combination is The rotation actions are synchronized; by manipulating the two groups of rotation combinations, the rotation component in the first rotation combination can be rotated and folded relative to the rotation component in the second rotation combination; in terms of the structure of the entire shaft mechanism, it is equivalent to folding the rotation component relative to the main bracket Superimposed with the unfolded state, the hinge mechanism is applied to a foldable terminal device.
  • the foldable terminal device has a larger folding range; generally, the foldable device has a flat unfolded state and a folded state. Therefore, when every hinge mechanism is The two rotating components are unfolded relative to the main support, and the flexible display screen is in a flat unfolded state.
  • the rotating components in the first rotating combination and the rotating components in the second rotating combination are symmetrically arranged in a one-to-one correspondence, which can further enhance the stability of the rotating shaft mechanism.
  • the area of the flexible display screen in the foldable terminal device may be larger than the bearing surface of the main support and the middle frame of the hinge mechanism.
  • the foldable terminal device may also include a first body and a second body ;
  • the middle frame in the first rotating combination is connected to the first body, the middle frame in the second rotating combination is connected to the second body, and the first body and the second body are used to carry the flexible display screen.
  • FIG. 1 is a schematic diagram of an unfolded state of a foldable terminal device provided by this application
  • Figure 2 is an exploded view of a foldable terminal device provided by this application in an unfolded state
  • FIG. 3 is a schematic diagram of a folded state of a foldable terminal device provided by this application.
  • Figure 4 is an exploded view of a foldable terminal device provided by this application in a folded state
  • FIG. 5 is a schematic structural diagram of a shaft mechanism provided by this application.
  • Fig. 6 is a schematic diagram of the A-A cross-sectional structure in Fig. 5;
  • FIG. 8 is a schematic structural diagram of the sliding member in the rotating shaft mechanism provided by the application between the main support and the middle frame;
  • Fig. 9 is a schematic cross-sectional structure diagram of G-G in Fig. 8;
  • FIG. 10 is a schematic structural diagram of a limiting structure when the rotating shaft mechanism is in an unfolded state provided by this application;
  • FIG. 11 is a schematic structural diagram of a limiting structure in a folded state of the rotating shaft mechanism provided by this application;
  • FIG. 12 is a schematic diagram of the structural principle of a shaft mechanism provided by this application.
  • FIG. 13 is a schematic diagram of the principle of the unfolded state of the hinge mechanism in cooperation with the flexible display screen provided by this application;
  • FIG. 14 is a schematic diagram of the principle of the bending state of a hinge mechanism in cooperation with a flexible display screen provided by this application;
  • FIG. 15 is a schematic diagram of an unfolded state of a hinge mechanism in cooperation with a flexible display screen provided by this application;
  • FIG. 16 is a schematic diagram of a bending state of a hinge mechanism provided by this application in cooperation with a flexible display screen;
  • FIG. 17 is a schematic diagram of the principle of adjusting the rotation center of a rotating shaft mechanism provided by this application.
  • FIG. 18 is a top view of the unfolded state of a rotating shaft mechanism provided by this application.
  • Figure 19 is an enlarged view of part J in Figure 18;
  • Fig. 20 is a schematic diagram of the cross-sectional structure of C-C in Fig. 18;
  • Figure 21 is an enlarged view of part L in Figure 20;
  • Fig. 23 is a schematic diagram of the D-D cross-sectional structure in Fig. 18;
  • Figure 24 is an enlarged view of part K in Figure 23;
  • FIG. 25 is a schematic diagram of the folded state of the structure shown in FIG. 23;
  • Fig. 26 is a schematic diagram of the E-E cross-sectional structure in Fig. 18;
  • Fig. 27 is a schematic diagram of the structure shown in Fig. 26 in a folded state.
  • the hinge mechanism that assists the folding and unfolding of the flexible display screen is structurally unstable. During the folding and unfolding process of the flexible display screen May cause damage to the flexible display.
  • the embodiments of the present application provide a hinge mechanism and a foldable terminal device provided with the hinge mechanism.
  • the hinge mechanism has a more stable connection structure and can provide stable support for the unfolding and folding of the flexible display screen.
  • FIG. 1 and FIG. 2 provides a schematic structural diagram of a foldable terminal device 100.
  • the foldable terminal device 100 here may be a foldable mobile phone or a foldable tablet computer, which is not limited here.
  • FIG. 1 shows a schematic structural diagram of a foldable terminal device 100 in an unfolded state.
  • the foldable terminal device 100 may include a first body 20, a second body 30, a flexible display screen 40, and a hinge mechanism 10; among them, the first body 20 It is equivalent to the same plane as the second main body 30, one end of the flexible display screen 40 is fixed to the first main body 20, and the other end of the flexible display screen 40 is fixed to the second main body 30; one end of the rotating shaft mechanism 10 is connected to the first main body 20, The other end is connected to the second body 30, and at the same time, the hinge mechanism 10 can also provide support for the flexible display screen 40; in order to more easily understand the structure of the foldable terminal device 100, please continue to refer to the unfolded state of the foldable terminal device 100 shown in FIG.
  • FIG. 3 shows a schematic structural diagram of the foldable terminal device 100 in the folded state.
  • the two bodies 30 are rotated by 180° so that the first body 20 and the second body 30 are relatively parallel, the flexible display screen 40 is bent, and the foldable terminal device 100 is folded; correspondingly, refer to the foldable terminal shown in FIG. 4
  • the hinge mechanism 10 has undergone structural deformation, thereby driving the first body 20 to rotate relative to the second body 30, and finally the folding of the foldable terminal device 100 is realized.
  • the hinge mechanism 10 plays an important role.
  • the structure of the hinge mechanism 10 provided in the embodiment of the present application can be referred to as shown in FIG.
  • the rotating assembly 2 can be rotated relative to the main support 1 to switch between the unfolded state and the folded state, in the unfolded state shown in FIG. 5; wherein, the rotating assembly 2 includes a rotating member 21, a middle frame 22, and a sliding member 23
  • the illustrated structure in FIG. 5 simplifies the structure of the shaft mechanism 10.
  • the rotating shaft mechanism 10 in the foldable terminal device 100 is provided with at least two rotating components 2.
  • only one rotating component 2 is provided on the rotating shaft mechanism 10 for exemplary description.
  • a first rotation center O1 is formed on the main support 1. It can be understood that the first rotation center O1 and the third rotation center O3 are both virtual structures show.
  • the rotating member 21 includes a first connection portion 211, a second connection portion 212, and a main body portion 213.
  • the main body portion 213 is connected between the first connection portion 211 and the second connection portion 212; specifically, the first connection portion 211 and the second connection portion 212
  • the two connecting portions 212 are all shown in an arc structure, and the concave surface of the first connecting portion 211 and the concave surface of the second connecting portion 212 are both facing the bearing surface q side of the middle frame 22, the first connecting portion 211 and the second connecting portion
  • the position of 212 is equivalent to left-right symmetry (of course, the structure is not necessarily the same symmetrically); among them, the center of the circle corresponding to the first connecting portion 211 coincides with the above-mentioned first rotation center O1, and the center of the circle corresponding to the second connecting portion 212 coincides with the third rotation
  • the center O3 coincides; correspondingly, a first arc-shaped chute 11 is formed on the main support 1, and the first connecting portion 211 extends into the first arc-shaped chute 11 to slidably fit with the first arc-shaped chute 11 to realize rotation
  • the rotating member 21 is equivalent to rotating around the first rotation center O1 relative to the main frame 1; and on the middle frame 22, A second arc-shaped sliding groove 221 is formed, and the second connecting portion 212 extends into the second arc-shaped sliding groove 221 to slidably fit with the second arc-shaped sliding groove 221, so that the other end of the rotating member 21 is hinged to the middle frame 22
  • the middle frame 22 relative to the rotating member 21 is equivalent to rotating around the third rotation center O3.
  • the bearing surface p of the main support 1 and the bearing surface q of the middle frame 22 are located on the same plane.
  • a second rotation center O2 is formed on the main support 1.
  • the structure can rotate relative to the main support 1 around the first rotation center O2; one end of the sliding member 23 is hinged to the main support 1, and the hinge point between the sliding member 23 and the main support is the second rotation center O2, so The sliding member 23 can rotate relative to the main frame 1 around the second rotation center O2; and the other end of the sliding member 23 is slidably fitted with the above-mentioned middle frame 22.
  • a sliding groove 222 is formed on the middle frame 22 to slide
  • the member 23 has a rod-shaped structure, so that the sliding member 23 can be slidably fitted with the sliding groove 222. It is understandable that the sliding member 23 can be reversed with respect to the connection structure of the main frame 1 and the middle frame 22 here, that is, one end of the sliding member 23 is hinged to the middle frame 22, and the other end of the sliding member 23 is slidingly fitted with the main frame 1 , The same technical effect can be achieved; in addition, the fitting manner of the sliding member 23 between the middle frame 22 and the main bracket 2 can also be realized by other structures, as shown in FIG. A sliding pin 223 is formed on 22, and an arc-shaped sliding rail 12 is formed on the main bracket 1.
  • the sliding pin 223 can slide in the arc-shaped sliding rail 12, and can also form a constraint between the main support 1 and the middle frame 22.
  • the axis of the first rotation center O1, the axis of the second rotation center O2, and the axis of the third rotation axis O3 are parallel to each other. 6 and 7, when the rotating assembly 2 is in the expanded state relative to the main support 1, the second rotation center O2 is located on the axis of the first rotation center O1 and the plane of the third rotation center O3 is away from the bearing surface of the middle frame 22 It can prevent the rotating assembly 2 from being "reflexed" when it continues to rotate relative to the main support 1 in the self-deployed state. Therefore, the entire rotating shaft mechanism 10 has a higher anti-reflex ability and higher stability.
  • the limiting structure may include a first limiting surface 31 formed on the main bracket 1 and a second limiting surface formed on the rotating assembly 2
  • the position surface 32, in the structure shown in FIG. 10, the rotating assembly 2 and the main support 1 are equivalent to being in an expanded state, and the first limiting surface 31 and the second limiting surface 32 are equivalent to being in a state of being perpendicular to each other; when the rotating assembly 2 Rotate to the folded state relative to the main frame 1.
  • FIG. 10 The state of the middle frame 22 and the main frame 1 is shown in FIG. Continue to spin.
  • the maximum rotation angle of the rotating assembly 2 relative to the main bracket 1 can be limited to 90°, that is, the middle frame 22 can be expanded from the state shown in FIG. 10 (equivalent to the angle between the middle frame 22 and the main bracket 1 being 180° ) Rotate 90° to the folded state shown in FIG. 11 (equivalent to the angle between the middle frame 22 and the main support 1 being 90°).
  • FIGS. 10 and 11 only show a possible structure.
  • the main support 1 and the middle frame 22 of the shaft mechanism 10 can of course also be shown in other forms, which will not be repeated here. .
  • the limiting structure further includes a limiting member that can be provided between the main support 1 and the rotating assembly 22.
  • the stent 1 rotates to the unfolded state, and the stopper contacts and interferes with the main stent 1 and the rotating assembly 2 (for example, the middle frame 22).
  • the limiter here can be a separate structure, or it can be a part of the rotating assembly 2, a part of the main support 1, or other structures of the shaft mechanism 10, which will be exemplified in the following description, so it is not shown here. Show.
  • the second connecting portion 212 does not protrude from the surface of the middle frame 22, so that when the shaft mechanism 10 is in a folded state, the rotating member 21 will not affect the external structure of the shaft mechanism 10, and the shaft mechanism 10 can also be applied more conveniently In the foldable terminal device 100.
  • the rotating member 21 can rotate relative to the main support 1 around the first rotation center O1
  • the middle frame 22 can rotate relative to the rotating member 21 around the third rotation center O2.
  • One end of the sliding member 23 can rotate relative to the main support 1 about the second rotation center O3, and the other end of the sliding member 23 can slide relative to the middle frame 22. Therefore, the degree of freedom of the entire shaft mechanism 10 is limited to only one degree of freedom, and the entire shaft mechanism 10
  • the structure can be simplified to the structure shown in Figure 12, and finally the middle frame 22 can be rotated relative to the main support 1 to achieve the folding effect.
  • the whole structure is simple and has a small virtual position and high stability.
  • the state in which the middle frame 22 of the shaft mechanism 10 rotates relative to the main bracket 1 can be the structure illustrated in FIGS. 13 and 14 Example;
  • the main frame 1 and the middle frame 22 are equivalent to the unfolded state, the flexible display 40 is attached to the main frame 1 and the middle frame 22, and the virtual center of rotation of the middle frame 22 relative to the main frame 1 is set.
  • the main frame 1 and the middle frame 22 are equivalent to the unfolded state, the flexible display 40 is attached to the main frame 1 and the middle frame 22, and the virtual center of rotation of the middle frame 22 relative to the main frame 1 is set.
  • the main frame 1 and the middle frame 22 there is a more complicated connection relationship between the main frame 1 and the middle frame 22.
  • only the basic movement of the middle frame 22 rotating relative to the main frame 1 is exemplified.
  • the virtual center of rotation O is equivalent to the virtual center of rotation in which the middle frame 22 simply rotates relative to the main support 1), the distance between the rotation center O and the flexible display 40 is L; the middle frame 22 rotates clockwise relative to the main support 1 around the virtual rotation center O , The flexible display screen 40 is bent with the middle frame 22. 13 and 14, when the middle frame 22 rotates relative to the main support 1, if L ⁇ 0 (the virtual rotation center O is above the flexible display 40), the flexible display 40 will be squeezed; if L>0 (The virtual rotation center O is below the flexible display screen 40, as shown in FIG. 13 or FIG.
  • the flexible display screen 40 is stretched, and the larger L is, the longer the flexible display screen 40 is stretched; therefore, according to The actual application needs to adjust the size of L reasonably so that the unfolded length of the flexible display screen 40 (the unfolded state is shown in FIG. 15) and the folded length (the folded state is shown in FIG. 16) are basically equal, so that the flexible display screen 40 can be folded and The unfolding will not cause extrusion or stretching problems, and the risk of failure of the flexible display screen 40 can be reduced.
  • the first rotation center O1 between the main support 1 and the rotating member 21 of the rotating shaft mechanism 10 provided by the embodiment of the present application, the third rotation center 03 between the rotating member 21 and the middle frame 22 can refer to FIG. 17
  • the position of the virtual rotation center O can be adjusted by adjusting the XY directions shown, so that L can be adjusted so that the final flexible display screen 40 can meet the condition that the unfolded length and the folded length are basically equal to prevent the flexible display screen 40 from being stretched or squeezed. Pressure damage.
  • the second rotation center O2 between the main support 1 and the sliding member 23 is only a constraint, and will not affect the virtual rotation center O of the middle frame 22 relative to the main support 1.
  • the first body 20 and the second body 30 of the foldable terminal device 100 can be folded and unfolded at 180°, as shown in FIG. A top view of the unfolded state of the hinge mechanism 10 of the folding terminal device 100.
  • the hinge mechanism 10 includes a main bracket 1 (the main bracket 1 is not shown in FIG. 18 due to the viewing angle) and a plurality of rotating components 2, which are divided into The first rotation combination (the left half structure in FIG. 18) and the second rotation combination (the right half structure in FIG. 6), it can be understood that the main support 1 is set between the first rotation combination and the second rotation combination .
  • the middle frame 22 in each rotating assembly 2 in the first rotating assembly has an integrated structure, and is located in each The rotating action of the rotating assembly 2 is synchronized, so that the middle frame 22 in the first rotating assembly can rotate relative to the main support 1 to achieve 90° folding; and the middle frame 22 of each rotating assembly 2 in the second rotating assembly also has an integrated Structure, the rotation action of each rotation component 2 in the first rotation combination is synchronized, so that the middle frame 22 in the second rotation combination can rotate relative to the main bracket 1 to achieve 90° folding, and the foldable terminal device 100
  • the first body 20 is connected to the middle frame 22 in the first rotating combination (that is, the left middle frame 22 in FIG.
  • the second body 30 is connected to the middle frame 22 in the second rotating combination (that is, the right middle frame in FIG. 19). 22)
  • the first body 20 of the foldable terminal device 100 can be expanded and folded by 180° relative to the second body 30, thereby realizing the folding and unfolding of the flexible display screen 40.
  • FIG. 19 in order to introduce the structure of the shaft mechanism 10 in FIG. 18 in detail, take a screenshot of the part J in FIG. 18 on the plane of C-C to obtain the C-C cross-sectional structure diagram of the shaft mechanism 10 as shown in FIG. 20.
  • the left and right sides of the main bracket 1 are respectively provided with two rotating assemblies 2 (only the rotating member 21 and the middle frame 22 of the rotating assembly 2 are shown in FIG. 20, and the sliding member 23 is not shown), and two The rotating components 2 are staggered along the cross-sectional direction of FIG. 20 (of course, they can also be distributed symmetrically). Therefore, the partial structures of the two rotating components 2 in FIG. 20 present different partial structures.
  • the rotating member 21 is provided with a first screen support member 41 for supporting the flexible display screen 40.
  • the first screen support 41 here can be fixed to the rotating member 21 by means of bonding, welding, riveting, threaded connection, or the like.
  • a second screen support 42 can also be movably provided between the first screen support 41 and the main support 1, or a second screen support 42 can be provided between the first screen support 41 and the main support 1.
  • the third screen support 43 is movably arranged between the middle frames 22.
  • the second screen support 42 can be provided only between the first screen support 41 and the main support 1, or only the first screen support
  • a third screen support 43 is provided between the screen support 41 and the middle frame 22, and a second screen support 42 can also be provided between the first screen support 41 and the main bracket 1.
  • the first screen support 41 and A third screen support 43 is provided between the middle frame 22.
  • a second screen support 42 is provided between the first screen support 41 and the main bracket 1.
  • the first screen support 41 A third screen support 43 is provided between the middle frame 22 and the middle frame 22.
  • the first screen support 41 forms the above-mentioned lap surface d in a way of preventing the snapping F
  • the second screen support 42 is matched with the first screen support 41 with a structure that can be adapted to the anti-dropping buckle F structure, so that the anti-dropping buckle F of the first screen support 41 can limit the second screen support 42;
  • the matching structure of the second screen support 42 and the main bracket 1 is similar to the state shown in FIG. 21, and the cooperation between the third screen support 43 and the first screen support 41 and the middle frame 22 is also similar to that shown in FIG.
  • the limit of the main frame 1, the first screen support 41 to the second screen support 42 and the middle frame 22, the first screen support 41 to the third screen support 43 can also be Realization in other forms is not limited in this application.
  • the structure of the anti-release buckle F is adopted here, considering that the second screen support 42 and the third screen support 43 will be relative to the first screen support 41 when the rotating assembly 2 rotates relative to the main support 1. , The main support 1 and the middle frame 22 rotate, and the groove formed by the anti-release buckle F can provide the second screen support 42 and the third screen support 43 with a rotation space margin caused by the rotation.
  • FIG. 20 Please continue to refer to FIG. 20, where the rotating assembly 2 is in an expanded state relative to the main support 1, where the bearing surface of the first screen support 41, the bearing surface of the second screen support 42, and the third screen support 43
  • the bearing surface, the bearing surface of the main support 1 and the bearing surface of the middle frame 22 are in the same plane.
  • the first screen support 41, the second screen support 42 and the third screen support 43 can serve as the main support
  • the limit piece between the rotating assembly 2 and the rotating assembly 2 can limit the maximum stroke of the rotating assembly 2 relative to the main support 1 in the unfolded state.
  • Figure 20 shows that the two rotating components 2 are kept flush with respect to the main support 1 (equivalent to the unfolded state of the rotating shaft mechanism 10).
  • the rotating assembly 2 rotates 90° clockwise relative to the main support 1 to obtain the folded state of the rotating shaft mechanism 10 shown in FIG. Keeping it relatively flat can provide a good support effect for the flexible display screen 40.
  • FIG. 23 shows the mating relationship of the main support 1, the middle frame 22, the rotating member 21, the first screen support 41 and the second screen support 42.
  • the structure of the K part in the box in Fig. 23 is enlarged to obtain as shown in Fig. 24 In the enlarged view of, it can be seen that in order to support the second screen support 42, a supporting surface c is also formed on the main support 1, the middle frame 22, and the first screen support 41.
  • Figure 23 shows that the two rotating components 2 are kept flush with respect to the main frame 1 (equivalent to the unfolded state of the shaft mechanism 10).
  • the rotating assembly 2 rotates 90° clockwise relative to the main support 1 to obtain the folded state of the rotating shaft mechanism 10 shown in FIG. Keeping it relatively flat can provide a good support effect for the flexible display screen 40.
  • FIG. 26 Take a screenshot of the part J in FIG. 18 with the plane where EE is located to obtain the DD cross-sectional structure diagram of the shaft mechanism 10 as shown in FIG. 26.
  • the cross-sectional structure of 10 is similar, and the structure shown in FIG. 26 can be obtained by turning the structure shown in FIG. 20 left and right.
  • Figure 26 shows that the two rotating components 2 are kept flush with respect to the main frame 1 (equivalent to the unfolded state of the shaft mechanism 10).
  • the rotating assembly 2 is rotated 90° clockwise with respect to the main support 1 to obtain the folded state of the rotating shaft mechanism 10 shown in FIG. 27.
  • the cross-sectional structure of the rotating shaft mechanism 10 shown in FIG. 27 is similar to the cross-sectional structure of the rotating shaft mechanism 10 shown in FIG. 22 , Flip the structure shown in Figure 22 left and right to get the structure shown in Figure 27.
  • the present application provides the hinge mechanism 10 with a simple structure and small vacancy and high stability; when the hinge mechanism 10 is applied to the foldable terminal device 100, the bearing surface of the main support 1 and the bearing surface of the middle frame 22
  • the flexible display screen 40 that can carry the foldable terminal device 100 can provide a good support effect for the flexible display screen 40.
  • the foldable terminal device 100 will not slide relative to the rotating shaft mechanism 10 during the folding and unfolding process, which can reduce the risk of failure of the flexible display screen 40.

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Abstract

一种转轴机构(10)，包括主支架(1)及至少一个旋转组件(2)，每个旋转组件可以相对主支架旋转以在展开状态与折叠状态之间切换；主支架与任意一个旋转组件的配合结构中，主支架具有第一旋转中心(O1)和第二旋转中心(O2)；旋转组件包括旋转件(21)、中框(22)以及滑动件(23)，中框具有第三旋转中心(O3)；旋转件可绕第一旋转中心旋转地与主支架连接，旋转件的另一端可绕第三旋转中心旋转地与中框连接；滑动件的一端铰接于主支架，滑动件可相对主支架绕第二旋转中心旋转；滑动件的另一端与中框滑动配合，以使中框沿滑动件的延伸方向远离或靠近第二旋转中心。转轴机构可以在可折叠终端设备展开与折叠过程中对柔性显示屏起到良好的支撑效果，且柔性显示屏失效风险低。还涉及包括该转轴机构的可折叠终端设备(100)。

Description

一种转轴机构及可折叠终端设备
相关申请的交叉引用
本申请要求在2020年03月20日提交中国专利局、申请号为202010202791.1、申请名称为“一种转轴机构及可折叠终端设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及终端设备领域，尤其涉及一种转轴机构及可折叠终端设备。
背景技术
随着科技的发展，柔性屏的技术逐渐成熟，进而促使应用柔性屏的终端设备的显示方式发生非常大的变化。以折叠手机为例，其柔性屏可以根据不同的使用场景灵活变化以切换使用模式，这也是当下手机厂商的研发方向。
对于诸如折叠手机这种终端设备，柔性屏只是其结构的一部分，要实现整个终端设备的可折叠还需要转轴机构的配合。目柔性屏在可折叠终端设备中的发展方向主要有两方面：屏幕滑动式和屏幕固定式。具体而言，屏幕滑动式就是在折叠过程中柔性屏会随着转轴机构的运动而在结构件上滑动，在柔性屏展开时，结构件结构不够稳定，会对柔性屏施加一定拉力，而在柔性屏折叠时则可能出现滑动或挤压问题；而屏幕固定式则是柔性屏与设备的结构件相对固定，设备在折叠过程中转轴机构配合柔性屏的变化而变化，转轴机构复杂，且抗反折能力差，也容易损坏柔性显示屏。
因此，目前用于配合柔性屏折叠与展开的转轴机构都存在结构不稳定的问题，在折叠与展开过程中存在损坏柔性显示屏的风险。
发明内容
本申请提供一种转轴机构及可折叠终端设备，该转轴机构可以对可折叠终端设备中的柔性显示屏起到良好的支撑效果，且能够降低柔性显示屏失效的风险。
第一方面，本申请提供了一种转轴机构，该转轴机构可以应用到可折叠终端设备中，可折叠终端设备可以为可折叠手机、可折叠平板电脑。该转轴机构包括主支架以及至少一个旋转组件，其中的主支架相当于为整个结构提供承载与支撑，每个旋转组件都可以相对主支架旋转，从而实现旋转组件相对主支架的折叠或展开效果；在主支架与旋转组件之间还设置有用于限定旋转组件相对主支架旋转最大行程的限位结构。在主支架与任意一个旋转组件的配合结构中，主支架上形成有第一旋转中心和第二旋转中心，而每个旋转组件包括有旋转件、滑动件以及中框，在中框上形成有第三旋转中心，第一旋转中心的轴线、第二旋转中心的轴线以及第三旋转轴心的轴线相互平行；旋转件包括第一连接部、第二连接部以及连接于第一连接部与第二连接部之间的主体部，第一连接部可绕第一旋转中心旋转地与主支架连接，因此，旋转件可以相对主支架绕第一旋转中心旋转；第二连接部可绕第三旋转中心旋转地与中框连接，因此，中框可以相对旋转件绕第三旋转中心旋转；滑动件 的一端可绕第二旋转中心旋转地连接主支架，具体地滑动件可以铰接于主支架上的第二旋转中心；同时，滑动件的另一端与上述中框滑动配合，以使中框沿滑动件的延伸方向远离或靠近第二旋转中心。至此，旋转件可相对主支架绕第一旋转中心旋转，中框可相对旋转件绕第三旋转中心旋转，滑动件一端可相对主支架绕第二旋转中心旋转，滑动件另一端可相对中框滑动，因此，整个转轴机构的自由度限定为只有一个自由度，最终使得中框可以相对主支架旋转，实现折叠与展开效果；当旋转组件相对主支架处于展开状态，主支架的承载面与所述中框的承载面处于同一平面。整个转轴机构结构简单虚位小，具有较高的稳定性；将该转轴机构应用到可折叠终端设备中时，主支架的承载面和中框的承载面用于承载可折叠终端设备的柔性显示屏，可以对柔性显示屏起到良好的支撑效果，此外，只要合理设置第一旋转中心和第三旋转中心的位置，可折叠终端设备的柔性显示屏在折叠与展开过程中不会相对转轴机构滑动，可以降低柔性显示屏失效的风险。
一种可能实现的方式中，上述旋转件以两个相连接的弧形结构实现，具体的，旋转件的第一连接部和第二连接部均为弧形结构，且第一连接部的凹面和第二连接部的凹面均朝向中框的承载面一侧，第一连接部和第二连接部位置相当于左右对称(当然，结构不一定对称相同)；其中，第一连接部所对应的圆心与上述第一旋转中心重合，第二连接部所对应的圆心则与第三旋转中心重合；在主支架上形成有第一弧形滑槽，第一连接部伸入第一弧形滑槽以与第一弧形滑槽滑动配合，当第一连接部沿第一弧形滑槽滑动，旋转件相当于相对主支架绕第一旋转中心相对主支架旋转；而在中框上则形成有第二弧形滑槽，第二连接部伸入第二弧形滑槽以与第二弧形滑槽滑动配合，当第二连接部沿第二弧形滑槽滑动，中框相当于相对旋转件绕第三旋转中心旋转；在中框相对主支架旋转过程中，第一连接部不凸出于主支架的承载面，第二连接部不凸出于中框的承载面，使得在转轴机构处于折叠状态时，旋转件不会影响转轴机构的外部结构，转轴机构也可以更方便地应用于可折叠终端设备中。
如上所述，该转轴机构可以应用于可折叠终端设备，以实现柔性显示屏的折叠与展开，因此，一种可能实现的方式中在，在旋转件上还设置有第一屏支撑件，可以用于支撑如柔性显示屏等外部结构，当旋转组件相对主支架处于展开状态，第一屏支撑件的承载面、主支架的承载面与中框的承载面处于同一平面。此处的第一屏支撑件可以采用粘接、焊接、铆接、螺纹连接等方式固定于旋转件上。
一种可能实现的方式中，第一屏支撑件与主支架之间可活动地设置有第二屏支撑件，还可以在第一屏支撑件与中框之间可活动地设置第二屏支撑件，第二屏支撑件和第三屏支撑件也可以用于支撑外部结构，当旋转组件相对主支架处于展开状态，所第三屏支撑件的承载面、第一屏支撑件的承载面、主支架的承载面与中框的承载面处于同一平面。
上述第二屏支撑件是可活动的，为了将第二屏支撑件限定于第一屏支撑件与主支架之间，可以使第一屏支撑件与主支架配合形成搭接面，第二屏支撑件搭接在搭接面上；类似地，对于设置于第一屏支撑件与中框之间的第二屏支撑件，使第一屏支撑件与中框配合形成搭接面，第二屏支撑件搭接在搭接面上。
该转轴机构的限位结构可以限定旋转组件相对主支架旋转的最大行程，针对旋转组件相对主支架向折叠状态旋转，一种可能实现的方式中，该转轴机构的限位结构可以包括形成于主支架上的第一限位面和形成于中框上的第二限位面，当旋转组件相对主支架旋转至折叠状态，第一限位面和第二限位面接触干涉。而针对旋转组件相对主支架向展开状态旋 转，一种可能实现的方式中，限位结构还包括可以在主支架与中框之间设置的限位件，当所述旋转组件相对主支架旋转至展开状态，限位件与主支架、旋转组件接触干涉。当然，限位结构不限于上述方式，此处不再赘述。
第二方面，本申请提供了一种可折叠终端设备，该可折叠终端设备可以是可折叠手机、可折叠平板电脑等；该可折叠终端设备具体可以包括柔性显示屏及上述任一种转轴机构；柔性显示屏设置于主支架承载面与中框的承载面一侧，当旋转组件相对主支架折叠或展开，柔性显示屏随之实现折叠与展开。
当转轴机构中的旋转组件只有一个时，柔性显示屏只能在旋转组件相对主支架展开状态与折叠状态之间切换，折叠角度有限。因此，提出一种具有至少两个旋转组件的转轴机构，每个旋转组件可以实现旋转组件相对主支架旋转，至少两个旋转组件则可以与主支架配合实现多种折叠方式。将至少两个旋转组件分为两组：第一旋转组合和第二旋转组合，位于第一旋转组合中的每个旋转组件的旋转动作同步；而第二旋转组合中每个所述旋转组件的旋转动作同步；通过操控两组旋转组合，可以使得第一旋转组合中旋转组件相对第二旋转组合中旋转组件实现旋转与折叠；在整个转轴机构的结构看，相当于实现旋转组件相对主支架折叠与展开状态的叠加，将该转轴机构应用到可折叠终端设备中，可折叠终端设备具有更大的折叠范围；一般地，可折叠设置具有平面展开状态与折叠状态，因此，当转轴机构中每个旋转组件相对主支架展开，柔性显示屏处于平面展开状态。
一种可能实现的方式中，第一旋转组合中的旋转组件与第二旋转组合中的旋转组件以一一对应的方式对称设置，可以进一步增强转轴机构的稳定性。
可折叠终端设备中柔性显示屏的面积可能大于转轴机构的主支架承载面、中框的承载面，为了对柔性显示屏提供良好的支撑，可折叠终端设备还可以包括第一主体和第二主体；第一旋转组合中的中框连接第一主体，第二旋转组合中的中框连接第二主体，第一主体和第二主体用于承载柔性显示屏。
附图说明
图1为本申请提供的一种可折叠终端设备展开状态示意图；
图2为本申请提供的一种可折叠终端设备展开状态***图；
图3为本申请提供的一种可折叠终端设备折叠状态示意图；
图4为本申请提供的一种可折叠终端设备折叠状态***图；
图5为本申请提供的一种转轴机构的结构示意图；
图6为图5中A-A剖面结构示意图；
图7为图5中B-B剖面结构示意图；
图8为本申请提供的一种转轴机构中滑动件在主支架与中框之间配合的结构示意图；
图9为图8中G-G的剖面结构示意图；
图10为本申请提供的一种转轴机构展开状态时限位结构的结构示意图；
图11为本申请提供的一种转轴机构折叠状态时限位结构的结构示意图；
图12为本申请提供的一种转轴机构结构原理示意图；
图13为本申请提供的一种转轴机构配合柔性显示屏展开状态原理示意图；
图14为本申请提供的一种转轴机构配合柔性显示屏弯折状态原理示意图；
图15为本申请提供的一种转轴机构配合柔性显示屏展开状态示意图；
图16为本申请提供的一种转轴机构配合柔性显示屏弯折状态示意图；
图17为本申请提供的一种转轴机构调整旋转中心的原理示意图；
图18为本申请提供的一种转轴机构展开状态俯视图；
图19为图18中J部放大图；
图20为图18中C-C剖面结构示意图；
图21为图20中L部放大图；
图22为图20所示结构折叠状态示意图；
图23为图18中D-D剖面结构示意图；
图24为图23中K部放大图；
图25为图23所示结构折叠状态示意图；
图26为图18中E-E剖面结构示意图；
图27为图26所示结构折叠状态示意图。
附图标记：1-主支架；11-第一弧形滑槽；12-弧形滑轨；2-旋转组件；21-旋转件；211-第一连接部；212-第二连接部；213-主体部；22-中框；221-第二弧形滑槽；222-滑槽；223-滑动销钉；23-滑动件；31-第一限位面；32-第二限位面；41-第一屏支撑件；42-第二屏支撑件；43-第三屏支撑件；10-转轴机构；20-第一主体；30-第二主体；40-柔性显示屏；100-可折叠终端设备。
具体实施方式
可折叠的柔性显示屏在折叠手机这类终端设备中的应用越来越常见，但是目前辅助柔性显示屏折叠与展开的转轴机构都存在结构不稳定的情况，在柔性显示屏的折叠与展开过程中可能会造成柔性显示屏的损坏。基于此，本申请实施例提供一种转轴机构以及设置有该转轴机构的可折叠终端设备，该转轴机构具有更稳定的连接结构，可以为柔性显示屏的展开与折叠提供稳定的支撑。为了更加清晰地描述本申请实施例的技术方案，下面结合附图，对本申请实施例提供的转轴机构以及可折叠终端设备进行详细说明。
如图1和图2所示的本申请实施例提供一种可折叠终端设备100的结构示意图，此处的可折叠终端设备100可以是可折叠手机、可折叠平板电脑，此处不做限定。图1中示出了可折叠终端设备100展开状态的结构示意图，该可折叠终端设备100可以包括第一主体20、第二主体30、柔性显示屏40以及转轴机构10；其中，第一主体20和第二主体30相当于位于同一平面，柔性显示屏40的一端固定于第一主体20上，柔性显示屏40的另一端固定于第二主体30上；转轴机构10一端连接第一主体20，另一端连接第二主体30，同时，转轴机构10还可以为柔性显示屏40提供支撑；为了更方便理解可折叠终端设备100的结构，请继续参照图2所示的可折叠终端设备100展开状态的***图，转轴机构10在此时处于展开状态，当转轴机构10折叠，会带动第一主体20相对第二主体30旋转，从而带动柔性显示屏40折叠，实现可折叠终端设备100的折叠。关于可折叠终端设备100的折叠状态可以参照图3和图4所示，图3示出了可折叠终端设备100折叠状态的结构示意图，第一主体20相当于自图1所示的状态相对第二主体30旋转了180°，使得第一主体20和第二主体30相对平行，柔性显示屏40被弯折，可折叠终端设备100实现折叠；对应地，可以参照图4所示的可折叠终端设备100折叠状态的***图，可以清楚看出，转轴机构10发生了结构变形，从而带动第一主体20相对第二主体30旋转，最终实现可折 叠终端设备100的折叠。
在可折叠终端设备100中，转轴机构10发挥了重要作用，本申请实施例所提供的转轴机构10的结构可以参照图5所示，该转轴机构10可以包括主支架1以及至少一个旋转组件2，此处的旋转组件2可以相对主支架1旋转以在展开状态与折叠状态之间切换，图5示出的展开状态中；其中，旋转组件2包括旋转件21、中框22以及滑动件23，可以理解的是，图5中的图示结构对转轴机构10的结构做了简化处理。而关于转轴机构10中各个结构之间的配合结构可以参照图5中A-A的剖面结构示意图(如图6所示)以及图5中B-B的剖面结构示意图(如图7所示)。可以理解的是，可折叠终端设备100中的转轴机构10设置有至少两个旋转组件2，此处仅以转轴机构10设置有一个旋转组件2进行示例性说明。
请先参照图6所示的转轴机构10的剖面结构，在主支架1上形成有第一旋转中心O1，可以理解的是，第一旋转中心O1和第三旋转中心O3均是以虚拟的结构显示。旋转件21则包括第一连接部211、第二连接部212以及主体部213，主体部213连接于第一连接部211和第二连接部212之间；具体地，第一连接部211、第二连接部212均以弧形结构示出，且第一连接部211的凹面和第二连接部212的凹面均朝向中框22的承载面q一侧，第一连接部211和第二连接部212位置相当于左右对称(当然，结构不一定对称相同)；其中，第一连接部211所对应的圆心与上述第一旋转中心O1重合，第二连接部212所对应的圆心则与第三旋转中心O3重合；对应的，主支架1上形成有第一弧形滑槽11，第一连接部211伸入第一弧形滑槽11以与第一弧形滑槽11滑动配合，从而实现旋转件21的一端与主支架1铰接，当第一连接部211沿第一弧形滑槽11滑动，旋转件21相当于相对主支架1绕第一旋转中心O1旋转；而在中框22上则形成有第二弧形滑槽221，第二连接部212伸入第二弧形滑槽221以与第二弧形滑槽221滑动配合，从而实现旋转件21的另一端与中框22铰接于，当第二连接部212沿第二弧形滑槽221滑动，中框22相对旋转件21相当于绕第三旋转中心O3旋转。在图6所示的结构中，主支架1的承载面p与中框22的承载面q位于同一平面。
关于滑动件23请参照图7所示的转轴机构10的剖面结构，在主支架1上形成有第二旋转中心O2，当其他结构铰接于主支架1，如果其铰接点与第一旋转中心O2重合，则该结构可以相对主支架1绕第一旋转中心O2旋转；滑动件23的一端铰接于主支架1，且滑动件23与主支架之间的铰接点即上述第二旋转中心O2，因此，滑动件23可以相对主支架1绕第二旋转中心O2旋转；而滑动件23的另一端与上述中框22滑动配合，具体参照图7中，在中框22上形成有滑槽222，滑动件23具有杆状结构，使得滑动件23可以与滑槽222滑动配合。可以理解的是，此处滑动件23相对于主支架1与中框22的连接结构可以对调，即滑动件23的一端铰接于中框22，而滑动件23的另一端与主支架1滑动配合，可以取得同样的技术效果；此外，滑动件23在中框22与主支架2之间的配合方式还可以用其他的结构实现，如图8所示的一种可能的配合方式，在中框22上形成有滑动销钉223，在主支架1上形成有弧形滑轨12，请继续参照图9所示的图8中G-G的截面，可以理解的是，当旋转组件2相对主支架1旋转，滑动销钉223可以在弧形滑轨12中滑动，也能在主支架1与中框22之间形成一约束。此处，第一旋转中心O1的轴线、第二旋转中心O2的轴线以及第三旋转轴心O3的轴线相互平行。结合图6和图7可知，当旋转组件2相对主支架1处于展开状态时，第二旋转中心O2位于第一旋转中心O1的轴线与第三旋转中 心O3的轴线所在平面背离中框22承载面的一侧，可以防止旋转组件2相对主支架1自展开状态继续旋转出现“反折”，因此整个转轴机构10具有较高的抗反折能力，稳定性更高。
当旋转组件2相对主支架1旋转，设置有可以限定转轴机构10的折叠与展开最大角度的限位结构。具体地，针对旋转组件2相对主支架1向折叠状态旋转，请参照图10，限位结构可以包括形成在主支架1上的第一限位面31以及在旋转组件2上形成的第二限位面32，在图10所示的结构中，旋转组件2与主支架1相当于处于展开状态，第一限位面31和第二限位面32相当于处于相互垂直的状态；当旋转组件2相对主支架1旋转至折叠状态，中框22与主支架1的状态如图11所示，第一限位面31与第二限位面32接触干涉，以阻止中框22相对主支架1继续旋转。此处，旋转组件2相对主支架1的最大旋转角度可以限定为90°，即中框22可以自图10所示的展开状态(相当于中框22与主支架1之间夹角为180°)旋转90°至图11所示的折叠状态(相当于中框22与主支架1之间夹角为90°)。需要说明的是，图10和图11仅示出了一种可能实现的结构，在转轴机构10的主支架1与中框22之间，当然还可以以其他形式示出，此处不再赘述。
而针对旋转组件2相对主支架1向展开状态旋转，一种可能实现的方式中，限位结构还包括可以在主支架1与旋转组件22之间设置的限位件，当旋转组件2相对主支架1旋转至展开状态，限位件与主支架1、旋转组件2(例如中框22)接触干涉。此处的限位件可以是单独的结构，也可以是旋转组件2的一部分、主支架1的一部分或者是转轴机构10其他的结构，在后文中会进行示例性说明，因此此处未进行图示。
请继续参照图10和图11所示的转轴机构10在展开与折叠状态，在中框22相对主支架1自图10所示状态旋转至图11所示状态的过程中，旋转件21的第一连接部211沿第一弧形滑槽11顺时针滑动，相当于旋转件21绕第一旋转中心O1顺时针旋转，而旋转件21的第二连接部212沿第二弧形滑槽221逆时针滑动，相当于中框22绕第三旋转中心O3顺时针旋转，当中框22相对主支架1旋转至最大行程(即图11所示的状态)，第一连接部211不凸出于主支架1的表面，第二连接部212不凸出于中框22的表面，使得转轴机构10处于折叠状态时，旋转件21不会影响转轴机构10的外部结构，转轴机构10也可以更方便地应用于可折叠终端设备100中。
结合图5至图11所示的转轴机构10的结构，可以看出，旋转件21可相对主支架1绕第一旋转中心O1旋转，中框22可相对旋转件21绕第三旋转中心O2旋转，滑动件23一端可相对主支架1绕第二旋转中心O3旋转，滑动件23另一端可相对中框22滑动，因此，整个转轴机构10的自由度限定为只有一个自由度，整个转轴机构10的结构可以简化为图12所示的结构，最终使得中框22可以相对主支架1旋转，实现折叠效果，整个结构简单虚位小，具有较高的稳定性，当将这种转轴机构10应用于例如图1所示的可折叠终端设备100中时，能够为柔性显示屏40提供稳定的支撑。
另外，当将这种转轴机构10应用于例如图1所示的可折叠终端设备100中时，转轴机构10的中框22相对主支架1旋转的状态可以以图13和图14所示例的结构示例；图13中，主支架1与中框22相当于处于展开状态，柔性显示屏40贴合在主支架1与中框22上，设定中框22相对主支架1旋转的虚拟旋转中心O(当然在实际转轴机构10中，主支架1与中框22之间有更为复杂的连接关系，此处仅以中框22相对主支架1旋转这一基本动作进行示例性说明，此处的虚拟旋转中心O相当于中框22相对主支架1简单旋转的虚拟的旋转中心)，旋转中心O距离柔性显示屏40的距离为L；当中框22相对主支架1绕 虚拟旋转中心O顺时针旋转，柔性显示屏40随中框22弯折。结合图13和图14，在中框22相对主支架1旋转的过程中，若L<0(虚拟旋转中心O在柔性显示屏40上方)，柔性显示屏40会被挤压；若L>0(虚拟旋转中心O在柔性显示屏40下方，如图13或图14所示的状态)，柔性显示屏40被拉伸，且L越大，柔性显示屏40被拉得越长；因此，根据实际应用需求合理调整L的大小，使得柔性显示屏40展开长度(展开状态如图15所示)与折叠长度(折叠状态如图16所示)基本相等，即可使柔性显示屏40的折叠与展开不会出现挤压或拉伸问题，可以降低柔性显示屏40失效的风险。
基于上述理论，本申请实施例所提供的转轴机构10的主支架1与旋转件21之间的第一旋转中心O1、旋转件21与中框22之间的第三旋转中心03可以参照图17所示的X-Y方向进行调整，即可调整虚拟旋转中心O的位置，从而对L调节使得最终柔性显示屏40可以满足展开长度与折叠长度基本相等的条件，防止柔性显示屏40被拉伸或挤压损坏。需要说明的是，主支架1与滑动件23之间的第二旋转中心O2仅做约束，不会对中框22相对主支架1旋转的虚拟旋转中心O产生影响。
参照图1和图3所示的可折叠终端设备100，该可折叠终端设备100的第一主体20和第二主体30能够实现180°折叠与展开，如图18所示的一种应用于可折叠终端设备100的转轴机构10展开状态的俯视图，该转轴机构10包括主支架1(由于视角所限，图18中未示出主支架1)以及多个旋转组件2，这些旋转组件2分为第一旋转组合(图18中的左半边结构)和第二旋转组合(图6中的右半边结构)，可以理解的是，主支架1即设置于第一旋转组合和第二旋转组合之间。
将图18中方框J部的结构放大得到图19所示的放大图，位于第一旋转组合中的每个旋转组件2中的中框22具有一体式结构，位于第一旋转组合中的每个旋转组件2的旋转动作同步，使得第一旋转组合中的中框22可以与主支架1相对旋转实现90°折叠；而第二旋转组合中每个所述旋转组件2的中框22也具有一体式结构，位于第一旋转组合中的每个旋转组件2的旋转动作同步，使得第二旋转组合中的中框22可以与主支架1相对旋转实现90°折叠，将可折叠终端设备100中的第一主体20与第一旋转组合中的中框22(即图19中左侧中框22)连接，第二主体30与第二旋转组合中的中框22(即图19中右侧中框22)连接，即可实现可折叠终端设备100的第一主体20相对第二主体30展开与折叠180°的效果，进而实现柔性显示屏40的折叠与展开。
请继续参照图19，为了详细介绍图18中转轴机构10的结构，以C-C所在平面对图18中的J部分进行截图得到转轴机构10如图20所示的C-C剖面结构示意图。
参照图20，主支架1的左右两侧分别设置有两个旋转组件2(图20中仅示出了旋转组件2的旋转件21和中框22，未示出滑动件23)，而两个旋转组件2沿垂直于图20截面方向错列分布(当然，也可以对称分布)，因此，图20中两个旋转组件2的各部分结构呈现不同的部分结构。在图20中，旋转件21上设置有第一屏支撑件41，用于支撑柔性显示屏40。此处的第一屏支撑件41可以采用粘接、焊接、铆接、螺纹连接等方式固定于所述旋转件21上。为了对柔性显示屏40起到更稳定可靠的支撑，还可以在第一屏支撑件41与主支架1之间可活动地设置第二屏支撑件42，还可以在第一屏支撑件41与中框22之间可活动地设置第三屏支撑件43，当然，此处既可以仅在第一屏支撑件41与主支架1之间设置第二屏支撑件42，也可以仅在第一屏支撑件41与中框22之间设置第三屏支撑件43，还可以在第一屏支撑件41与主支架1之间设置第二屏支撑件42，同时在第一屏支撑件41 与中框22之间设置第三屏支撑件43，图20中示出的即是在第一屏支撑件41与主支架1之间设置有第二屏支撑件42，在第一屏支撑件41与中框22之间设置第三屏支撑件43。
上述第二屏支撑件42是可活动的，为了将第二屏支撑件42限定于第一屏支撑件41与主支架1之间，请参照图21所示的图20中L部的放大图，可以使第一屏支撑件41与主支架1配合形成搭接面d，第二屏支撑件42搭接在搭接面d上；类似地，对于设置于第一屏支撑件41与中框22之间的第二屏支撑件42，使第一屏支撑件41与中框22配合形成搭接面d，第二屏支撑件42搭接在搭接面d上。在图21中，以第一屏支撑件41与第二屏支撑件42的配合示例，第一屏支撑件41以防脱卡扣F的方式形成上述搭接面d，而第二屏支撑件42则以能够与防脱卡扣F结构相适配的结构与第一屏支撑件41配合，使得第一屏支撑件41的防脱卡扣F可以对第二屏支撑件42进行限位；当然，第二屏支撑件42与主支架1的配合结构与图21所示的状态类似，且第三屏支撑件43与第一屏支撑件41、中框22之间的配合也与图20类似，此处不再赘述；另外，主支架1、第一屏支撑件41对第二屏支撑件42以及中框22、第一屏支撑件41对第三屏支撑件43的限位还可以以其他的形式实现，本申请不做限定。需要说明的是，此处采用防脱卡扣F的结构，是考虑到在旋转组件2相对主支架1旋转时第二屏支撑件42和第三屏支撑件43会相对第一屏支撑件41、主支架1、中框22发生旋转，防脱卡扣F形成的凹槽可以为第二屏支撑件42、第三屏支撑件43提供旋转所带来的旋转空间余量。
请继续参照图20，此处的旋转组件2相对主支架1为展开状态，此处的第一屏支撑件41的承载面、第二屏支撑件42的承载面、第三屏支撑件43的承载面、主支架1的承载面以及中框22的承载面处于同一平面，此处的第一屏支撑件41、第二屏支撑件42以及第三屏支撑件43可以充当设置于主支架1与旋转组件2之间的限位件，可以限定旋转组件2相对主支架1向展开状态旋转的最大行程。
图20示出的两个旋转组件2相对主支架1保持平齐(相当于转轴机构10展开状态)，将图20中左侧的旋转组件2相对主支架1逆时针旋转90°，右侧的旋转组件2相对主支架1顺时针旋转90°，得到图22所示的转轴机构10的折叠状态，旋转件21不凸出主支架1的表面、中框22的表面，整个转轴机构10外表面保持相对平齐，可以对柔性显示屏40起到良好的支撑效果。
以D-D所在平面对图18中的J部分进行截图得到转轴机构10如图23所示的D-D剖面结构示意图。图23示出的主支架1、中框22、旋转件21、第一屏支撑件41以及第二屏支撑件42的结构都与图20中不同，这是因为沿图18所示的转轴机构10的长度方向，各个结构的截面是变化的，但是可以理解的是，结构的变化并不影响各结构的功能实现。图23中示出了主支架1、中框22、旋转件21、第一屏支撑件41以及第二屏支撑件42的配合关系，将图23中方框K部的结构放大得到图24所示的放大图，可以看出，为了支撑第二屏支撑件42，在主支架1、中框22、第一屏支撑件41上还形成有支撑面c。
图23示出的两个旋转组件2相对主支架1保持平齐(相当于转轴机构10展开状态)，将图23中左侧的旋转组件2相对主支架1逆时针旋转90°，右侧的旋转组件2相对主支架1顺时针旋转90°，得到图25所示的转轴机构10的折叠状态，旋转件21不凸出主支架1的表面、中框22的表面，整个转轴机构10外表面保持相对平齐，可以对柔性显示屏40起到良好的支撑效果。
以E-E所在平面对图18中的J部分进行截图得到转轴机构10如图26所示的D-D剖 面结构示意图，可以看出图26所示的转轴机构10的截面结构与图20所示的转轴机构10的截面结构相似，将图20所示结构左右翻转即可得到图26所示的结构。图26示出的两个旋转组件2相对主支架1保持平齐(相当于转轴机构10展开状态)，将图26中左侧的旋转组件2相对主支架1逆时针旋转90°，右侧的旋转组件2相对主支架1顺时针旋转90°，得到图27所示的转轴机构10的折叠状态，图27所示的转轴机构10的截面结构与图22所示的转轴机构10的截面结构相似，将图22所示结构左右翻转即可得到图27所示的结构。
综上，本申请提供转轴机构10结构简单虚位小，具有较高的稳定性；将该转轴机构10应用到可折叠终端设备100中时，主支架1的承载面和中框22的承载面可以承载可折叠终端设备100的柔性显示屏40，可以对柔性显示屏40起到良好的支撑效果，此外，只要合理设置第一旋转中心O1和第三旋转中心O3位置，可折叠终端设备100的柔性显示屏40在折叠与展开过程中不会相对转轴机构10滑动，可以降低柔性显示屏40失效的风险。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的范围。这样，倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (10)

  1. 一种转轴机构，其特征在于，包括：主支架以及至少一个旋转组件，每个所述旋转组件可以相对所述主支架旋转以在展开状态与折叠状态之间切换，所述主支架与所述旋转组件之间还设置有用于限定所述旋转组件相对所述主支架旋转最大行程的限位结构；
    在所述主支架与任意一个所述旋转组件的配合结构中，所述主支架具有第一旋转中心和第二旋转中心；所述旋转组件包括旋转件、中框以及滑动件，所述中框具有第三旋转中心，所述第一旋转中心的轴线、第二旋转中心的轴线以及第三旋转轴心的轴线相互平行；
    所述旋转件包括第一连接部、第二连接部以及连接于所述第一连接部与所述第二连接部之间的主体部，所述第一连接部可绕所述第一旋转中心旋转地与所述主支架连接，所述第二连接部可绕所述第三旋转中心旋转地与所述中框连接；
    所述滑动件的一端可绕所述第二旋转中心旋转地连接所述主支架，所述滑动件的另一端与所述中框滑动配合，以使所述中框沿所述滑动件的延伸方向远离或靠近所述第二旋转中心；
    当所述旋转组件相对所述主支架处于所述展开状态，所述主支架的承载面与所述中框的承载面处于同一平面。
  2. 如权利要求1所述的转轴机构，其特征在于，所述第一连接部和第二连接部均为弧形结构，且所述第一连接部的凹面和所述第二连接部的凹面均朝向所述中框的承载面一侧；
    所述主支架上形成第一弧形滑槽，所述第一连接部伸入所述第一弧形滑槽以与所述第一弧形滑槽滑动配合；
    所述中框上形成有第二弧形滑槽，所述第二连接部伸入所述第二弧形滑槽以与所述第二弧形滑槽滑动配合；
    在所述中框相对所述主支架旋转过程中，所述第一连接部不凸出于所述主支架的承载面，所述第二连接部不凸出于所述中框的承载面。
  3. 如权利要求1或2所述的转轴机构，其特征在于，所述主体部上设置有第一屏支撑件，所述第一屏支撑件用于支撑外部结构；
    当所述旋转组件相对所述主支架处于所述展开状态，所述第一屏支撑件的承载面、所述主支架的承载面与所述中框的承载面处于同一平面。
  4. 如权利要求3所述的转轴机构，其特征在于，所述第一屏支撑件与所述主支架之间可活动地设置有第二屏支撑件；当所述旋转组件相对所述主支架处于所述展开状态，所述第二屏支撑件的承载面、所述第一屏支撑件的承载面、所述主支架的承载面与所述中框的承载面处于同一平面；
    和/或，所述第一屏支撑件与所述中框之间可活动地设置有的第三屏支撑件；当所述旋转组件相对所述主支架处于所述展开状态，所述第三屏支撑件的承载面、所述第一屏支撑件的承载面、所述主支架的承载面与所述中框的承载面处于同一平面。
  5. 如权利要求4所述的转轴机构，其特征在于，所述第一屏支撑件与所述主支架配合形成有搭接面，所述第二屏支撑件搭接在所述搭接面上以使所述第二屏支撑件限定在所述第一屏支撑件与所述主支架之间；
    所述第一屏支撑件与所述中框配合形成有搭接面，所述第二屏支撑件搭接在所述搭接 面上以使所述第二屏支撑件限定在所述第一屏支撑件与所述中框之间。
  6. 如权利要求1-5中任一项所述的转轴机构，其特征在于，所述限位结构包括形成于所述主支架上的第一限位面以及形成于所述中框上的第二限位面；
    当所述旋转组件相对所述主支架处于所述折叠状态，所述第一限位面与所述第二限位面接触干涉。
  7. 如权利要求1-5中任一项所述的转轴机构，其特征在于，所述限位结构还包括设置于所述主支架与所述中框之间的限位件；
    当所述旋转组件相对所述主支架处于所述展开状态，所述限位件与所述主支架、所述旋转组件接触干涉。
  8. 一种可折叠终端设备，其特征在于，包括柔性显示屏及如权利要求1-7中任一项所述的转轴机构；
    所述柔性显示屏设置于所述主支架承载面与所述中框的承载面一侧。
  9. 如权利要求8所述的可折叠终端设备，其特征在于，当所述转轴机构具有至少两个所述旋转组件，所述旋转组件分为第一旋转组合和第二旋转组合；
    所述第一旋转组合中每个所述旋转组件的旋转动作同步，所述第二旋转组合中每个所述旋转组件的旋转动作同步；
    当每个所述旋转组件相对所述主支架展开，所述柔性显示屏处于平面展开状态。
  10. 如权利要求9所述的可折叠终端设备，其特征在于，还包括第一主体和第二主体；
    所述第一旋转组合中的所述中框连接所述第一主体，所述第二旋转组合中的所述中框连接所述第二主体，所述第一主体和所述第二主体用于承载所述柔性显示屏。
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