WO2023138402A1 - 一种同步机构、转轴机构和电子设备 - Google Patents

一种同步机构、转轴机构和电子设备 Download PDF

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Publication number
WO2023138402A1
WO2023138402A1 PCT/CN2023/070877 CN2023070877W WO2023138402A1 WO 2023138402 A1 WO2023138402 A1 WO 2023138402A1 CN 2023070877 W CN2023070877 W CN 2023070877W WO 2023138402 A1 WO2023138402 A1 WO 2023138402A1
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WO
WIPO (PCT)
Prior art keywords
rotating shaft
swing arm
slider
base
groove
Prior art date
Application number
PCT/CN2023/070877
Other languages
English (en)
French (fr)
Other versions
WO2023138402A9 (zh
WO2023138402A8 (zh
Inventor
张垚磊
周国统
严斌
霍文龙
Original Assignee
荣耀终端有限公司
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 荣耀终端有限公司 filed Critical 荣耀终端有限公司
Priority to EP23741248.1A priority Critical patent/EP4269824A4/en
Priority to US18/264,665 priority patent/US20240302871A1/en
Publication of WO2023138402A1 publication Critical patent/WO2023138402A1/zh
Publication of WO2023138402A9 publication Critical patent/WO2023138402A9/zh
Publication of WO2023138402A8 publication Critical patent/WO2023138402A8/zh

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    • 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
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • H04M1/0216—Foldable in one direction, i.e. using a one degree of freedom hinge
    • H04M1/022—The hinge comprising two parallel pivoting axes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1675—Miscellaneous details related to the relative movement between the different enclosures or enclosure parts
    • G06F1/1681—Details related solely to hinges
    • 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
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/02—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms the movements of two or more independently moving members being combined into a single movement
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/08—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion
    • F16H25/12—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion with reciprocation along the axis of rotation, e.g. gearings with helical grooves and automatic reversal or cams
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
    • G06F1/1624—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with sliding enclosures, e.g. sliding keyboard or display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • 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
    • G09F9/301—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 flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • 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
    • 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
    • F16C2370/00—Apparatus relating to physics, e.g. instruments
    • 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
    • F16C2380/00—Electrical apparatus
    • 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
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H04M1/0268—Details of the structure or mounting of specific components for a display module assembly including a flexible display panel

Definitions

  • the present application relates to the field of electronic products, in particular to a synchronous mechanism, a rotating shaft mechanism and electronic equipment.
  • the shaft mechanism is provided with a first swing arm and a second swing arm.
  • the two swing arms are connected to the middle frame and equipped with a synchronization mechanism.
  • the synchronization mechanism includes a gear set composed of four sequentially meshing gears.
  • the swing arms on both sides are connected to the gear set to realize synchronous swing.
  • the size of the gears cannot be greatly reduced in order to ensure the strength of the meshing teeth.
  • the number of parts is large, the cost is high, and the assembly is difficult.
  • the four gears are arranged in sequence to achieve the synchronous rotation of the left and right middle frames.
  • the four small gears are assembled and meshed according to the position. The process is complex and demanding, and it is difficult to reduce the cost.
  • the embodiment of the present application provides that the synchronization mechanism includes a base, a slider, and a first swing arm and a second swing arm located on both sides of the slider, and the first swing arm and the second swing arm both rotate relative to the base;
  • the slider is arranged to slide along the axis parallel to the rotation of the first swing arm and the second swing arm; the first swing arm and the second swing arm are symmetrically provided with a first matching portion along the center line of the base, and the two sides of the slider are symmetrically provided with a second matching portion along the center line, and the second matching portion corresponds to the first matching portion; Be consistent.
  • the synchronous mechanism of the embodiment of the present application is equipped with a slider, and through the cooperation of the first matching part and the second matching part, the swing arms on both sides are driven to move synchronously, that is, the slider cooperates with the corresponding rotating swing arm mechanism, which realizes the further reduction of the size of the synchronous mechanism and the simplification of the number of parts under the small size requirements of electronic equipment such as folding screens, and at the same time, the synchronous transmission is stable and the virtual position is small.
  • the embodiment of this application also provides the first implementation mode of one aspect:
  • the synchronization mechanism also includes a first rotation shaft and a second rotation shaft installed on the base, the first swing arm rotates around the first rotation shaft, the second swing arm rotates around the second rotation shaft, and the slider slides along the first rotation shaft and the second rotation shaft.
  • the slider slides along the rotation shafts of the first swing arm and the second swing arm, so that the slider does not need to add other sliding constraints, which further reduces the number of parts, and also reduces the tolerance connection, which can reduce the synchronous virtual position.
  • the embodiment of this application also provides a second implementation manner in one aspect:
  • Both sides of the slider are provided with first sleeves, and the first sleeves on both sides cover the first rotating shaft and the second rotating shaft respectively, and the sliding block slides along the first rotating shaft and the second rotating shaft.
  • the sliding constraint is formed by the sleeve, the structure is simple to set, and the sliding fit is reliable and stable.
  • the embodiment of this application also provides a third implementation manner in one aspect:
  • the center positions of the second matching portions on both sides of the slider in the thickness direction are at the same height as the axes of the first and second rotating shafts.
  • the embodiment of this application also provides a fourth implementation manner in one aspect:
  • the slider has four corner regions, the four corner regions are all provided with the first sleeve, and the second matching portion is provided between the two first sleeves on each side.
  • the distances between the sliding constraints in the X ⁇ Y directions are as far as possible, and the purpose is to reduce the rotation of the slider during the synchronous motion when sliding in the Y direction, thereby reducing the risk of jamming and asynchrony between the first swing arm and the second swing arm.
  • the embodiment of this application also provides a fifth implementation manner in one aspect:
  • Both ends of the first swing arm and the second swing arm are provided with second sleeves, and the middle part along the axis direction is provided with a protrusion, the first matching part is disposed on the protrusion, the first rotation shaft and the second rotation shaft respectively pass through the corresponding two second sleeves and the protrusions, and the first sleeve slides between the second sleeve and the protrusion.
  • An accommodating space is formed between the second sleeve and the protrusion, and the first sleeve slides in the accommodating space, so that the space can be fully utilized and the structure can be simplified.
  • the embodiment of this application also provides a sixth implementation mode of one aspect:
  • the first matching portion is a spiral groove
  • the second matching portion is a protrusion.
  • the protrusion and the spiral groove cooperate to make the rotation of the first swing arm and the second swing arm more stable.
  • the embodiment of this application also provides a seventh implementation manner in one aspect:
  • Each side of the slider is provided with at least one protrusion, and each protrusion corresponds to one spiral groove; or one spiral groove corresponds to more than one protrusion.
  • the embodiment of this application also provides an eighth implementation manner in one aspect:
  • the surface of the protrusion facing the helical groove is a helical curved surface that fits with the bottom surface of the helical groove.
  • the helical curved surface is fully in contact with the helical groove, and the sliding interaction is more reliable.
  • the embodiment of this application also provides a ninth implementation manner in one aspect:
  • the width of the protrusion is approximately equal to the width of the helical groove. This not only ensures that the two can interact with each other all the time, but also does not interfere with the relative movement of the two.
  • the embodiment of the present application also provides a tenth implementation manner in one aspect:
  • Both ends of both sides of the base are provided with third sleeves, and the first rotating shaft and the second rotating shaft are inserted into the two third sleeves on corresponding sides.
  • the installation of the first rotating shaft and the second rotating shaft is realized through the sleeve structure, and the space where the rotating shafts are located is shared with the first sleeve and the second sleeve, which is beneficial to a compact structure.
  • the embodiment of this application also provides an eleventh implementation manner of one aspect:
  • the slider and the base are slidingly fitted along the axis.
  • the sliding cooperation between the slider and the base is beneficial to further ensure the stability and reliability of sliding.
  • the embodiment of this application also provides a twelfth implementation manner of one aspect:
  • the slider is arranged between the base and the rotating shaft base, and the bottom of the slider is provided with a groove, and the groove is slidingly matched with the base; or, the base is provided with a groove, and the bottom of the slider is provided with a slide table matched with the groove.
  • the sliding fit is realized by the groove, and the fit is stable.
  • the embodiment of this application also provides a thirteenth implementation manner in one aspect:
  • the groove is a dovetail groove
  • the base or the slider is provided with a protrusion
  • the protrusion is slidably matched with the dovetail groove.
  • the sliding limit of the dovetail groove and the protrusion is more reliable and the sliding is stable.
  • the embodiment of the present application further provides a shaft mechanism, including a shaft base and a shaft cover, and at least one set of the synchronization mechanism described above is provided between the shaft base and the shaft cover. According to the length of the rotating shaft base, one or more sets of synchronization mechanisms can be provided, which is beneficial to ensure the reliability of synchronization.
  • the embodiment of this application also provides the first implementation mode of the two aspects:
  • the base is arranged between the shaft cover of the shaft mechanism and the shaft base. Setting the base between the shaft cover and the rotating shaft base to install the first rotating shaft and the second rotating shaft is convenient for processing and arrangement, the structure is relatively compact, and it is also convenient for processing and manufacturing.
  • the embodiment of this application also provides the second implementation of the two aspects:
  • the base is fixedly connected with one of the shaft cover and the rotating shaft base, or is integrally arranged. It is integrated with the shaft cover or the rotating shaft base, and has a simple structure and is easy to assemble; it is fixedly connected with the shaft cover or the rotating shaft base, which is convenient for processing.
  • the embodiment of this application also provides a third implementation mode of the two aspects:
  • the rotating shaft mechanism includes a main swing arm and an auxiliary swing arm, and the auxiliary swing arm is slidingly connected with the main swing arm; the first swing arm and the second swing arm are the main swing arm or the auxiliary swing arm.
  • the first swing arm and the second swing arm are set as the main swing arm or the auxiliary swing arm, which can be set according to the layout.
  • an embodiment of the present application further provides an electronic device, including a flexible folding screen, a middle frame supporting the flexible folding screen, and the hinge mechanism provided in the second aspect and any implementation manner thereof.
  • the electronic device has the same technical effect as the above-mentioned rotating shaft mechanism.
  • the embodiment of this application also provides the first specific implementation manner of the third aspect:
  • the first swing arm or the second swing arm is fixed to the middle frame.
  • Fig. 1 is a schematic diagram of the deployment of the electronic device in the embodiment of the present application, and the flexible display screen is not shown;
  • Fig. 2 is the synchronous mechanism in Fig. 1 and the synoptic schematic diagram of rotating shaft base;
  • Figure 3 is an enlarged view of position A in Figure 2;
  • Fig. 4 is the schematic diagram of synchronous mechanism in Fig. 3;
  • Fig. 5 is an exploded view of the synchronization mechanism in Fig. 4;
  • Figure 6 is a top view of the synchronization mechanism in Figure 4.
  • Fig. 7 is the schematic diagram of slider in Fig. 5;
  • Fig. 8 is a schematic structural view of the first swing arm in Fig. 5;
  • Fig. 9 is a sectional view along the X direction at the position of the protruding part of the synchronization mechanism in Fig. 1;
  • Figure 10 is an enlarged view of the position of the slider in Figure 9;
  • Fig. 11 is a cross-sectional view along the X direction of the protruding part of the synchronization mechanism in Fig. 1, showing the shaft cover;
  • Figure 12 is an enlarged view of the position of the slider 14 in Figure 11;
  • Fig. 13 is a schematic perspective view of the synchronization mechanism in Fig. 1 installed between the base of the rotating shaft and the base of the rotating shaft;
  • Fig. 14 is a schematic diagram of a dovetail groove provided on the slider to cooperate with the base of the rotating shaft;
  • FIG. 15 is a schematic diagram of the mobile phone in FIG. 1 in a folded state.
  • the embodiment of this application provides an electronic device, for example, the electronic device is a mobile phone.
  • the electronic device includes a flexible folding screen (also called “flexible display screen”) and a hinge mechanism 100 , and the flexible folding screen is folded or unfolded through the hinge mechanism 100 .
  • Figure 1 is a schematic diagram of the mobile phone in an unfolded state in the embodiment of the present application, showing the hinge mechanism 100 and the middle frame 200, but not showing the flexible folding screen
  • Figure 15 is a schematic diagram of the mobile phone in Figure 1 in a folded state.
  • the mobile phone includes a hinge mechanism 100 located in the middle, and middle frames 200 located on both sides of the hinge mechanism 100.
  • the flexible folding screen is supported on the middle frames 200 on both sides.
  • the hinge mechanism 100 includes a hinge base 3 (also called an "integrated hinge base").
  • left and right are defined based on the central axis X of the rotating shaft mechanism 100.
  • the middle frame 200 on the left and right sides of the rotating shaft mechanism 100 can rotate relative to the rotating shaft base 3, thereby driving the flexible folding screen to fold or unfold.
  • a swing arm can be provided. One side of the swing arm is rotationally connected to the rotating shaft base 3, and the other side is fixed to the middle frame 200. Screws, rivets, etc.), dispensing, welding, etc. As shown in FIG.
  • the hinge mechanism 100 also includes a shaft cover 4 disposed under the hinge base 3 to cover the bottom of the hinge mechanism 100, wherein the side facing the flexible folding screen is defined as the top, and the side away from the flexible folding screen is defined as the bottom.
  • the rotation of the middle frame 100 is relative to the shaft mechanism 200 , the middle frame 100 is rotationally connected with the shaft base 3 , and the relative position of the shaft cover 4 and the shaft base 3 remains unchanged, so it also rotates relative to the shaft cover 4 .
  • the rotating shaft mechanism 100 of the mobile phone in this embodiment also includes a synchronous mechanism 1.
  • the synchronizing mechanism 1 is used to keep the rotation angle ⁇ of the middle frame 200 on both sides of the rotating shaft mechanism 100 relative to the shaft cover 4 or the rotating shaft base 3 to be consistent during the folding and unfolding process of the rotating shaft mechanism 100.
  • the rotating angle ⁇ can be understood with reference to FIG. 15 . It can be understood that due to manufacturing or assembly tolerances, during the rotation of the middle frames 200 on both sides, there may be a certain angular deviation in the rotation angle ⁇ . Generally, the range of the above-mentioned angular deviation may be 0°-20°, and within the range of the angular deviation, it can still be considered that the included rotation angle remains consistent.
  • the synchronous mechanism 1 in this embodiment can refer to Fig. 2-5, and Fig. 2 is the synchronous mechanism 1 in Fig. 1 and the schematic diagram of rotating shaft base 3 cooperation; Fig. 3 is the enlarged view of position A in Fig. 2; Fig. 4 is the schematic diagram of synchronous mechanism 1 in Fig. 3; Fig. 5 is the explosion diagram of synchronous mechanism 1 in Fig. 4.
  • the synchronous mechanism 1 includes a left swing arm (or defined as the first swing arm 111), a right swing arm (or defined as the second swing arm 112), a left rotating shaft (or defined as the first rotating shaft 121), a right rotating shaft (or defined as the second rotating shaft 122), a base (the base may specifically be the rotating shaft base 13 in FIG.
  • the rotating shaft base 13 is used as the basis of the synchronous mechanism 1 for installing the first swing arm 111, the second swing arm 112, the first rotating shaft 121, the second rotating shaft 122 and the slider 14.
  • the rotating shaft base 13 is arranged between the shaft cover 4 and the rotating shaft base 3.
  • the rotating shaft base 13 in this embodiment is installed on the rotating shaft base 3, as shown in FIG.
  • a part of the base 3 or the shaft cover 4 is, for example, integrally provided with the rotating shaft base 3 or the shaft cover 4 .
  • the rotating shaft mechanism 100 of the mobile phone is provided with two groups of synchronous mechanisms 1 arranged along the length direction of the rotating shaft mechanism 100, and two rotating shaft bases 13 are set accordingly to install the first swing arm 111, the second swing arm 112, the first rotating shaft 121, the second rotating shaft 122, the slider 14 and other components in the synchronizing mechanism 1 of each group.
  • the first rotating shaft 121 and the second rotating shaft 122 of the synchronous mechanism 1 are arranged on the rotating shaft base 13, the first rotating shaft 121 and the second rotating shaft 122 can be fixedly connected to the rotating shaft base 13, and can also be rotatably connected to the rotating shaft base 13, and the rotating axis is consistent with the rotating axis of the first swing arm 111 and the second swing arm 112.
  • the first rotating shaft 121 and the second rotating shaft 122 are constrained by the rotating shaft base 13.
  • the left and right sides of the rotating shaft base 13 are provided with sleeves at both ends of the length direction, which can be defined as the third sleeve 13a. Axially inserted into two third sleeves 13a on the corresponding sides of the rotating shaft base 13 respectively.
  • the two ends of the first rotating shaft 121 and the second rotating shaft 122 pass through the third sleeve 13a on the corresponding side, and can be limited in the third sleeve 13a in the axial direction, that is, they can only rotate relative to the third sleeve 13a.
  • One end of the shaft is L-shaped, and the other end passes through the two third sleeves 13a on the corresponding side.
  • the L-shaped end can be abutted against the end surface of the third sleeve 13a to form a limit, and the other end opposite to the L-shaped end can be provided with a limit component, or the L-shaped end can be abutted against other components to form an axial limit.
  • the first swing arm 111 and the second swing arm 112 are arranged symmetrically on the left and right sides of the central axis of the rotating shaft base 13 , and the central axis of the rotating shaft base 13 a is coaxial with the central axis of the rotating shaft mechanism 100 .
  • the first swing arm 111 can rotate around the first rotation axis 121
  • the second swing arm 112 can rotate around the second rotation axis 122 .
  • the first swing arm 111 and the second swing arm 112 are respectively connected to the middle frame 200 on both sides.
  • a swing arm fixed to the middle frame 200 can be provided to achieve a rotational connection with the shaft base 3.
  • the first swing arm 111 and the second swing arm 112 can be fixedly connected to the middle frame 200; 112 is an auxiliary swing arm, which is movably connected to the middle frame 200. Specifically, the auxiliary swing arm is slidably connected to the main swing arm. In FIG. The first swing arm 111 and the second swing arm 112 will rotate accordingly and slide along the length of the long hole 11d with the shaft.
  • the specific connection method between the first swing arm 111 and the second swing arm 112 of the synchronization mechanism and the middle frame 200 is not limited, as long as the first swing arm 111, the second swing arm 112 and the middle frame 200 have a direct or indirect connection relationship, when the first swing arm 111 and the second swing arm 112 rotate around the first rotation axis 121 and the second rotation axis 122 respectively, the middle frame 200 is driven to rotate accordingly, or the middle frame 200 is rotated to correspondingly drive the swing arm on the corresponding side To rotate, that is, to have a linkage effect of rotation.
  • the above-mentioned synchronous mechanism is further provided with a slider 14 , and the slider 14 is slidably arranged in a direction parallel to the axis of rotation of the first swing arm 111 and the second swing arm 112 .
  • the synchronous rotation control of the middle frames 200 on both sides is mainly realized by cooperation of the slider 14 and the first swing arm 111 and the second swing arm 112 .
  • Fig. 6 is a top view of the synchronous mechanism in Fig. 4, showing the X and Y directions;
  • Fig. 7 is a schematic diagram of the slider 14 in Fig. 5;
  • Fig. 8 is a schematic structural diagram of the first swing arm 111 in Fig. 5 .
  • the slider 14 is provided with sliding constraints along the axial direction of the rotational connection of the first swing arm 111 and the second swing arm 112.
  • the Y direction shown in FIG. Specifically, in this embodiment, as shown in FIG. 7 , the upper and lower ends of both sides of the slider 14 are provided with sleeves, which can be defined as the first sleeve 14a, and the upper and lower ends are the two ends along the Y direction.
  • the first rotating shaft 121 and the second rotating shaft 122 respectively pass through the two first sleeves 14a on the left and right sides of the slider 14 to form sliding constraints, that is, the slider 14 can only move freely along the axis directions of the first rotating shaft 121 and the second rotating shaft 122.
  • the sliding block 14 can only move along the Y direction.
  • first swing arm 111 and the second swing arm 112 are also provided with sleeves, which can be defined as second sleeves 11a.
  • first rotating shaft 121 passes through the third sleeve 13a at the upper end of the rotating shaft base 13, the second sleeve 11a at the upper end of the first swing arm 111, the first sleeve 14a at the upper end of the slider 14, the first sleeve 14a at the lower end of the sliding block 14, the second sleeve 11a at the lower end of the first swing arm 111, and the third sleeve 13a at the lower end of the rotating shaft base 13.
  • a part of one end of a second sleeve 11a extends axially to form a first stopper 11a1. It can also be understood with reference to FIG.
  • the first limiting part 11a1 and the second limiting part 13a1 will abut and limit the position along the circumferential direction, which is used to limit the swing range of the first swing arm 111 and the second swing arm 112, so as to avoid excessive rotation. As shown in FIG. Cannot continue to rotate in the direction of unfolding.
  • the inner hole of the second sleeve 11a can be a flat hole, that is, the hole wall has a flat portion.
  • the peripheral wall at one end of the first rotating shaft 121 and the second rotating shaft 112 has a flat portion.
  • the rotation axis 122, the binding tolerance chain is less, the synchronization is better, and it can save parts and space.
  • the slider 14 may not share a shaft with the first swing arm 111 and the second swing arm 112 , for example, a separate shaft is provided inside the first rotation shaft 121 and the second rotation shaft 122 as the sliding shaft of the slider 14 .
  • the sleeve structure described here (including the first sleeve 14a, the second sleeve 11a, and the third sleeve 13a) is mainly to limit the radial movement to carry out the sliding constraint in the Y direction. Therefore, the sleeve is not limited to a closed ring shape, and may also have a gap, as long as it can guide the slider to slide in the Y direction.
  • the sliding of the slider 14 along the Y direction of the first rotating shaft 121 and the second rotating shaft 122 is not limited to the arrangement of the first sleeve 14a.
  • the first rotating shaft 121 and the second rotating shaft 122 are provided with chute, and the two sides of the slider 14 are also provided with sliding tables capable of sliding in the chute along the Y direction.
  • the protrusion 14b may be a spiral protrusion 14b.
  • the sides of the first swing arm 111 and the second swing arm facing the slider 14 are respectively provided with a first fitting portion, and the first fitting portion of the first swing arm 111 and the first fitting portion of the second swing arm 112 are arranged symmetrically with respect to the center line of the rotating shaft base 13 .
  • the first matching part is specifically a spiral groove 11b (or defined as a spiral slide groove).
  • the spiral groove 11b can be a sinker groove or a through groove. As shown in FIG.
  • the spiral groove 11b cooperates with the spiral protrusion 14b.
  • the two ends of the first swing arm 111 are second sleeves 11a, and the middle part is provided with a protrusion 11c.
  • the protrusion 11c is also a sleeve structure for the first rotating shaft 121 to pass through. 11c, the first sleeve 14a at the lower end of the slider 14, the second sleeve 11a at the lower end of the first swing arm 111, the third sleeve 13a at the lower end of the rotating shaft base 13, and the second rotating shaft 122. This structure is very space-saving and compact.
  • the helical groove 11b is arranged on the protrusion 11c of the first swing arm 111 and the second swing arm 112, and an accommodation space is formed between the protrusion 11c and the second sleeve 11a at both ends.
  • the first sleeve 14a at the left end of the slider 14 is located in the accommodation space corresponding to the two ends of the first swing arm 111, and the length of the first sleeve 14a of the slider 14 along the Y direction is smaller than the length of the accommodation space along the Y direction, which allows the slider 14 to move along the Y direction.
  • the arms 112 are arranged symmetrically, and the cooperation between the second swing arm 112 and the right side of the slider 14 can be understood with reference to the cooperation between the first swing arm 111 and the left side of the slider 14 .
  • the protrusion 14b on the left side of the slider 14 is inserted into the spiral groove 11b of the first swing arm 111, and the protrusion 14b on the right side of the slider 14 is inserted into the spiral groove 11b of the second swing arm 112.
  • it will act on the spiral groove 11b in the opposite direction, driving the first swing arm 111 or the second swing arm 112 on the corresponding side to rotate, thereby ensuring the synchronous swing of the first swing arm 111 and the second swing arm 112 on both sides, and also ensuring the synchronous swing of the middle frames 200 on both sides, so that the rotation angle of the middle frames 200 on both sides remains consistent.
  • This solution realizes the synchronization function by setting the slider and the rotating swing arm mechanism to slide and cooperate through the protrusion and the spiral groove. Compared with the synchronization structure of the gear set, it can further reduce the size of the synchronization mechanism and reduce the number of parts under the small size requirements of electronic equipment such as folding screens. At the same time, it has the advantages of stable synchronization transmission and small virtual position.
  • the protrusion 14b can always abut and fit with the sidewalls 11b2 on both sides of the helical groove 11b in the axial direction, thereby forming a linkage effect of sliding of the slider 14 and rotation of the swing arm.
  • the first matching part is not limited to a spiral groove, as long as the side wall of the groove can abut and fit with the protruding part 14b in the axial direction during rotation, and the groove can be a straight groove or a curved groove.
  • the helical groove 11b cooperates with the protrusion 14b, it can ensure that the slider 14 and the swing arm can move more stably.
  • the first sleeve 14a of the slider 14 can be directly fitted with the first rotation shaft 121 and the second rotation shaft 122.
  • the slider 14 does not need to add other sliding constraints, which further reduces the number of parts, and also reduces the tolerance connection, which can reduce the synchronous virtual position.
  • the sliding constraint on the slider 14 is set at the corner area of the slider 14.
  • the slider 14 includes a roughly rectangular main body 14d, and four first sleeves 14a are suspended at both ends of the main body 14d, so that the distances between the sliding constraints in the X/Y directions are as far as possible. It can be understood that only one first sleeve 14a or more first sleeves 14a can be provided.
  • the spiral protrusion 14b is arranged in the middle of the slider 14, that is, between the first sleeves 14a at both ends. The protrusion 14b utilizes the space between the two first sleeves 14a without additionally increasing the size of the slider 14, which is beneficial to the reduction of the overall size of the synchronous mechanism 1; 11.
  • the second swing arm 112 interferes.
  • the helical grooves 11b of the first swing arm 111 and the second swing arm 112 are arranged between the upper and lower first sleeves 14a of the slider 14, and the slider 14 shares the space in the axial direction with the first swing arm 111 and the second swing arm 112, saving size space.
  • the protruding portion 14b is inserted into the spiral groove 11b.
  • the essence of the interaction between the two is that when the spiral groove 11b rotates with the first swing arm 111 and the second swing arm 112, the position of the part of the spiral groove 11b facing the protruding portion 14b in the Y direction will change, and the groove side wall 11b2 of the spiral groove 11b will push the protruding portion 14b, and then drive the slider 14 to move in the Y direction.
  • the protruding portion 14b moves in the Y direction, Then the protruding part 14b will also push the groove side wall 11b2 of the helical groove 11b, and the helical groove 11b needs to be rotated to adjust to the corresponding position and maintain the inserted relationship with the protruding part 14b. Therefore, the helical groove 11b is set in a helical shape, but the protruding part 14b is not limited to a helical shape, and can also be a non-helical structure, such as hemispherical, cylindrical, etc.
  • the width of the protrusion 14b along the Y direction and the width of the helical groove 11b in the Y direction should be approximately equal, and the width of the protrusion 14b can be slightly smaller than the width of the helical groove 11b, so as to ensure that the two can always interact without interfering with the relative movement of the two.
  • the spiral is a continuous structure.
  • the spiral groove 11b is only a small section of spiral structure. Projected along the Y direction, the projection of the spiral groove 11b can be circular or arc-shaped.
  • the protrusion 14b is also a small section of spiral structure, so the spiral trend shown in FIG. 5 is not obvious.
  • a helical groove 11b with a longer continuous length of the helix can be provided, and the protrusion 14b can also be designed so that the continuous length of the helix is longer and the surface in contact with the helical groove 11b is larger.
  • FIG. 9 is a cross-sectional view along the X direction at the position of the protrusion 14b of the synchronization mechanism 1 in FIG.
  • the protrusion 14b of the slider 14 is arranged symmetrically with respect to the axis (ie axis) of the first rotation shaft 121 and the second rotation shaft 122.
  • the axis lines of the rotating shaft 121 and the second rotating shaft 122 are at the same height or at the same horizontal line, and the thickness direction is the direction perpendicular to the XY plane.
  • the surface 14b1 of the protrusion 14b facing the spiral groove 11b is a spiral curved surface adapted to the groove bottom surface 11b1 of the spiral groove 11b, so that it can better fit with the groove bottom surface 11b1 of the spiral groove 11b that is a spiral curved surface, so as to interact better and improve the stability of force transmission, and accordingly, the stability of the middle frame 200 during rotation can also be improved.
  • Figure 11 is a cross-sectional view along the X direction at the protruding part 14b of the synchronization mechanism 1 in Figure 1, showing the shaft cover;
  • Figure 12 is an enlarged view of the position of the slider 14 in Figure 11;
  • the mobile phone includes the hinge base 3 supporting the flexible folding screen, and the slider 14 is arranged between the hinge base 13 and the hinge base 3, and can slide between the two, so that the sliding space of the slider 14 is inside the hinge mechanism 100, which does not affect the support of the hinge base 3 to the flexible foldable screen, and avoids holes in the sliding space of the slider 14, resulting in poor support of the screen.
  • the rotating shaft base 3 separates the flexible folding screen from the synchronous mechanism 1 to prevent the folding from affecting the operation and synchronous control accuracy of the synchronous mechanism 1 .
  • the slider 14 is not limited to being arranged between the rotating shaft base 3 and the rotating shaft base 13.
  • it can also be arranged between the rotating shaft base 13 and the shaft cover 4.
  • the specific position of the slider 14 can be selected according to the rotational connection positions of the first swing arm 111, the second swing arm 112 and the rotating shaft base 13, and the space size between the shaft cover 4 and the rotating shaft base 13.
  • the sliding constraint of sliding in the Y direction along the rotating shaft base 13 provided by the slider 14 above is the first sleeve 14a, and the fitting of the first sleeve 14a with the first rotating shaft 121 and the second rotating shaft 122 realizes the Y direction restraint. It can be seen that it is not limited thereto.
  • the slider 14 is provided with a groove 14c toward the bottom of the rotating shaft base 13.
  • the rotating shaft base 13 can be inserted into the groove 14c along the Y direction.
  • the rotating shaft base 13 can be used as a slide rail, and the slider 14 can slide directly along the rotating shaft base 13. In FIG.
  • the first sleeve 14a provided on the slider 14 fits with the first rotating shaft 121 and the second rotating shaft 122 to form a sliding constraint
  • the sliding block 14 is also provided with a groove 14c that slides and cooperates with the rotating shaft base 13 to form another sliding constraint, thereby ensuring the effect of the sliding constraint and ensuring that the slider 14 only moves along the Y direction. It can be seen that setting only one of these two sliding constraints can also achieve the purpose of restricting the movement of the slider 14 relative to the rotating shaft base 13 in the Y direction.
  • FIG. 14 is a schematic diagram of a dovetail groove provided on the slider 14 to cooperate with the rotating shaft base 13 .
  • a dovetail groove structure can be set between the slider 14 and the rotating shaft base 13, that is, the groove 14c provided at the bottom of the sliding block 14 is a dovetail groove, and the left and right sides of the top of the rotating shaft base 13 are correspondingly provided with protrusions 13b to match the shape of the dovetail groove, which further increases the constraint of the slider 14 in the thickness direction from the perspective of FIG. Therefore, the generation of virtual position during the control process of the synchronous mechanism 1 is reduced, which is beneficial to improve the precision of synchronous control.
  • the specific position and quantity of sliding constraints can be adjusted. It can be understood that a groove is provided on the base 13 of the rotating shaft, and the sliding block 14 is provided with a sliding table structure that slides along the groove.
  • first rotating shaft 121 and the second rotating shaft 122 of the above-mentioned synchronous mechanism 1 are connected to the rotating shaft base 13. It can be seen that it is also possible to be directly installed on the rotating shaft base 3. In fact, the rotating shaft base 13 may not be provided.
  • This embodiment mainly realizes sliding of the slider 14 along the Y direction. 13, located between the shaft cover 4 and the rotating shaft base 3, it is convenient for processing and arrangement, and the structure is relatively compact, and the rotating shaft base 13 can support the slider 14, and the sliding block 14 can also be provided with a groove 14c to slide along the rotating shaft base 13, so that the sliding of the slider 14 is relatively stable.
  • the above-mentioned embodiment mainly focuses on folding screen mobile phones. It can be seen that it is not limited to folding screen mobile phones, and can also be other electronic devices. It is not only applicable to electronic devices with folding screens, as long as the electronic devices have a requirement for relatively synchronous rotation, this solution can be adopted.
  • electronic devices can be tablet computers, laptops, wearable devices, vehicle-mounted devices, augmented reality (augmented reality, AR) computer, UMPC), netbook, personal digital assistant (personal digital assistant, PDA) and other mobile terminals, or digital cameras, SLR cameras/micro-single cameras, sports cameras, PTZ cameras, drones and other professional shooting equipment.

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Abstract

一种同步机构（1），包括摆臂（111、112）和滑块（14），所述摆臂（111、112）绕轴线转动，所述滑块（14）沿与所述轴线平行的方向滑动设置，所述摆臂（111、112）设置有螺旋凹槽（11b），所述滑块（14）设有与所述螺旋凹槽（11b）配合的凸出部（14b）。一种转轴机构（100），包括转轴基座（3）和轴盖（4），所述转轴基座（3）和所述轴盖（4）之间设置有所述同步机构（1）。一种电子设备，包括柔性折叠屏、支撑柔性折叠屏的中框（200）以及所述转轴机构（100）。采用设有螺旋凹槽（11b）的旋转摆臂机构和滑块（14）配合，实现了折叠屏等小尺寸要求下的同步机构尺寸进一步减小、零件数量精简，同时同步传动稳定，虚位量小。

Description

一种同步机构、转轴机构和电子设备
本申请要求于2022年01月18日提交中国专利局、申请号为202210055266.0、发明名称为“一种同步机构和电子设备”，以及于2022年04月08日提交中国专利局、申请号为202210368061.8、发明名称为“一种同步机构、转轴机构和电子设备”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
本申请涉及电子产品领域，特别涉及一种同步机构、转轴机构和电子设备。
背景技术
折叠屏折叠或展开时，绕转轴机构转动，转轴机构设有第一摆臂和第二摆臂，两个摆臂和中框连接，并配设有同步机构，同步机构包括四个依次啮合的齿轮组成的齿轮组，两侧的摆臂和齿轮组连接，以实现同步摆动。但该同步机构为了保证啮合齿的强度，齿轮无法较大幅度的减小尺寸，而且零件数量多，成本高、组装困难，四个齿轮依次排列开才能达成左右中框同步转动的需求，将4颗小齿轮按照位置组装并啮合好，工序复杂要求高，降成本困难。
发明内容
一方面，本申请实施例提供一种所述同步机构包括底座、滑块，以及位于所述滑块两侧的第一摆臂、第二摆臂，所述第一摆臂、所述第二摆臂均相对所述底座转动；
所述滑块沿平行于所述第一摆臂、所述第二摆臂转动的轴线方向滑动设置；所述第一摆臂和所述第二摆臂均沿所述基座的中线对称设有第一配合部，所述滑块的两侧沿所述中线对称设有第二配合部，所述第二配合部与所述第一配合部对应；所述第一摆臂和所述第二摆臂相对转动时，所述第一配合部和所述第二配合部配合带动所述滑块沿所述轴线方向滑动，使得所述第一摆臂和所述第二摆臂相对于所述基座的转动夹角保持一致。
本申请实施例的同步机构设置滑块，并通过第一配合部和第二配合部配合 带动两侧摆臂同步动作，即滑块配合相对应的旋转摆臂机构，实现了折叠屏等电子设备小尺寸要求下的同步机构尺寸进一步减小、零件数量精简，同时同步传动稳定、虚位量小。
基于一方面，本申请实施例还提供一方面的第一种实施方式：
所述同步机构还包括安装于所述底座的第一旋转轴和第二旋转轴，所述第一摆臂绕所述第一旋转轴转动，所述第二摆臂绕所述第二旋转轴转动，所述滑块沿所述第一旋转轴、所述第二旋转轴滑动。滑块沿第一摆臂、第二摆臂的旋转轴滑动，则滑块无需增加其他滑动约束件，进一步减少了零件数量，同时也缩小了公差连，可减小同步虚位。
基于一方面的第一种实施方式，本申请实施例还提供一方面的第二种实施方式：
所述滑块的两侧均设有第一套筒，两侧的所述第一套筒分别外套所述第一旋转轴、所述第二旋转轴，所述滑块沿所述第一旋转轴、所述第二旋转轴滑动。通过套筒形成滑动约束，结构设置简单，且滑动配合可靠稳定。
基于一方面的第一种实施方式，本申请实施例还提供一方面的第三种实施方式：
所述滑块的两侧的所述第二配合部在厚度方向的中心位，与所述第一旋转轴、所述第二旋转轴的轴心线位于同一高度。这样使得在第一摆臂或第二摆臂正反旋转时，施加到滑块上的力是对称均等的，从而可减小滑块卡涩的风险，而且也可以使正反转时手感力基本对称，以提升用户体验。
基于一方面的第一种实施方式，本申请实施例还提供一方面的第四种实施方式：
所述滑块具有四个角部区域，四个所述角部区域均设有所述第一套筒，每侧的两个所述第一套筒之间设置有所述第二配合部。这样使得滑动约束之间X\Y向距离均尽量远，目的是减小滑块在沿Y向滑动时传导同步运动上发生的旋转，从而降低卡涩、第一摆臂和第二摆臂不同步的风险。
基于一方面的第四种实施方式，本申请实施例还提供一方面的第五种实施方式：
所述第一摆臂和所述第二摆臂的两端均设有第二套筒，且沿所述轴线方向的中部均设有突起，所述第一配合部设于所述突起，所述第一旋转轴和所述第 二旋转轴分别贯穿对应的两个所述第二套筒和所述突起，所述第一套筒在所述第二套筒和所述突起之间滑动。第二套筒和突起之间形成容纳空间，第一套筒在容纳空间内滑动，这样可以充分利用空间，精简结构。
基于一方面以及一方面的第一种至第五种实施方式中的任一者，本申请实施例还提供一方面的第六种实施方式：
所述第一配合部为螺旋凹槽，所述第二配合部为凸出部。凸出部和螺旋凹槽配合，使得第一摆臂、第二摆臂的转动更加平稳。
基于一方面的第六种实施方式，本申请实施例还提供一方面的第七种实施方式：
所述滑块的每一侧设有至少一个所述凸出部，每个所述凸出部对应一个所述螺旋凹槽；或一个所述螺旋凹槽对应一个以上的所述凸出部。通过设置多个凸出部和螺旋凹槽，或者多个凸出部和一个螺旋凹槽，使得螺旋配合的同步动作更为可靠。
基于一方面的第六种实施方式，本申请实施例还提供一方面的第八种实施方式：
所述凸出部朝向所述螺旋凹槽的表面为与所述螺旋凹槽的槽底面贴合的螺旋曲面。螺旋曲面与螺旋凹槽接触充分，滑动的相互作用较为可靠。
基于一方面的第六种实施方式，本申请实施例还提供一方面的第九种实施方式：
所述凸出部的宽度和所述螺旋凹槽的宽度大致相等。这样既保证二者能够始终相互作用，又不会干二者的相对运动。
基于一方面的第第一至第九种实施方式中的任一者，本申请实施例还提供一方面的第十种实施方式：
所述底座的两侧的两端均设有第三套筒，所述第一旋转轴和所述第二旋转轴插入对应侧的两个所述第三套筒。通过套筒结构实现第一旋转轴、第二旋转轴的安装，与第一套筒、第二套筒共用旋转轴所在的空间，有利于结构紧凑。
基于一方面的第十种实施方式，本申请实施例还提供一方面的第十一种实施方式：
所述滑块和所述底座沿所述轴线方向滑动配合。滑块与底座滑动配合有利于进一步保证滑动的稳定可靠。
基于一方面的第十一种实施方式，本申请实施例还提供一方面的第十二种实施方式：
所述滑块设于所述底座和所述转轴基座之间，所述滑块的底部设置有凹槽，所述凹槽与所述底座滑动配合；或，所述底座设有凹槽，所述滑块的底部设有与所述凹槽配合的滑台。通过凹槽实现滑动配合，配合稳定。
基于一方面的第十二种实施方式，本申请实施例还提供一方面的第十三种实施方式：
所述凹槽为燕尾槽，所述底座或所述滑块设置有凸起，所述凸起与所述燕尾槽滑动配合。燕尾槽和凸起配合的滑动限位更为可靠，滑动稳定。
第二方面，本申请实施例还提供一种转轴机构，包括转轴基座和轴盖，所述转轴基座和所述轴盖之间设有至少一组上述任一项所述同步机构。根据转轴基座的长度，可以设置一组或以上的同步机构，这样有利于保证同步的可靠性。
基于二方面，本申请实施例还提供二方面的第一种实施方式：
所述底座设于所述转轴机构的轴盖和所述转轴基座之间。设置位于轴盖和转轴基座之间底座来安装第一旋转轴和第二旋转轴，便于加工布置，结构较为紧凑，也利于加工制造。
基于二方面的第一种实施方式，本申请实施例还提供二方面的第二种实施方式：
所述底座与所述轴盖、所述转轴基座中的一者固定连接，或者一体设置。与轴盖或转轴基座一体设置，结构简单易于装配；与轴盖或转轴基座固定连接，便于加工。
基于二方面，本申请实施例还提供二方面的第三种实施方式：
所述转轴机构包括主摆臂和副摆臂，所述副摆臂与所述主摆臂滑动连接；所述第一摆臂和所述第二摆臂为所述主摆臂或所述副摆臂。将第一摆臂、第二摆臂设置为主摆臂或副摆臂，可以根据布局进行设置。
第三方面，本申请实施例还提供一种电子设备，包括柔性折叠屏、支撑所述柔性折叠屏的中框，以及第二方面及其任一实施方式所提供的转轴机构。电子设备与上述的转轴机构具有相同的技术效果。
基于第三方面，本申请实施例还提供第三方面的第一种具体实施方式：
所述第一摆臂或所述第二摆臂与所述中框固定。
附图说明
图1为本申请实施例中电子设备展开的示意图，未示意出柔性显示屏；
图2为图1中同步机构和转轴基座配合的示意图；
图3为图2中A位置的放大图；
图4为图3中同步机构的示意图；
图5为图4中同步机构的爆炸图；
图6为图4中同步机构的俯视图；
图7为图5中滑块的示意图；
图8为图5中第一摆臂的结构示意图；
图9为图1中在同步机构的凸出部位置沿X向的剖视图；
图10为图9中滑块位置的放大图；
图11为图1中同步机构的凸出部位置沿X向的剖视图，示意出轴盖；
图12为图11中滑块14位置的放大图；
图13为图1中同步机构安装在旋转轴底座和转轴基座之间的立体示意图；
图14为滑块设置出燕尾槽以与旋转轴底座配合的示意图；
图15为图1中手机处于折叠状态的示意图。
具体实施例
该申请实施例提供一种电子设备，示例性的，该电子设备为手机。该电子设备包括柔性折叠屏(也称“柔性显示屏”)和转轴机构100，柔性折叠屏通过转轴机构100实现转动折叠或打开。如图1、15所示，图1为本申请实施例中手机处于展开状态的示意图，示意出转轴机构100和中框200，未示意柔性折叠屏；图15为图1中手机处于折叠状态的示意图。
手机包括位于中部的转轴机构100，和位于转轴机构100两侧的中框200，柔性折叠屏支撑在两侧的中框200之上，转轴机构100包括转轴基座3(也称“转轴整体底座”)。本实施例中以转轴机构100的中轴线X为基准定义左、右，转轴机构100左、右两侧的中框200可以相对转轴基座3转动，从而带动柔性折叠屏折叠或展开，具体可以设置摆臂，摆臂一侧与转轴基座3转动连接，另一侧与中框200固定，由摆臂实现中框200与转轴基座3的转动连接，转轴基座3可以是整体式结构，也可拆分为多个零件，通过固定件(例如螺钉、铆 钉等)、点胶、焊接等方式固接。如图15所示，转轴机构100还包括设置在转轴基座3下方的轴盖4，以对转轴机构100的底部进行遮盖，其中，定义朝向柔性折叠屏的一侧为顶部，远离柔性折叠屏的一侧为底部。中框100的转动是相对转轴机构200，中框100与转轴基座3转动连接，轴盖4与转轴基座3相对位置不变，故也是相对轴盖4转动。
本实施例中手机的转轴机构100还包括同步机构1，同步机构1用于转轴机构100在折叠展开过程中使转轴机构100两侧的中框200相对于轴盖4或转轴基座3的转动夹角θ保持一致，转动夹角θ可参照图15理解。可以理解，由于制作或装配公差，两侧的中框200在旋转过程中，转动夹角θ可能存在一定的角度偏差。通常，上述角度偏差的范围可以是0°～20°，在该角度偏差范围内，仍可视为转动夹角保持一致。
本实施例中的同步机构1可参照图2-5，图2为图1中同步机构1和转轴基座3配合的示意图；图3为图2中A位置的放大图；图4为图3中同步机构1的示意图；图5为图4中同步机构1的爆炸图。
同步机构1包括左摆臂(或定义为第一摆臂111)、右摆臂(或定义为第二摆臂112)、左旋转轴(或定义为第一旋转轴121)、右旋转轴(或定义为第二旋转轴122)、底座(底座具体可以是图4中的旋转轴底座13)以及滑块14(或定义为传动滑块、同步块、滑块部)。
其中，旋转轴底座13作为同步机构1的基础，用于安装第一摆臂111、第二摆臂112、第一旋转轴121、第二旋转轴122以及滑块14，旋转轴底座13设置在轴盖4和转轴基座3之间，本实施例中的旋转轴底座13安装于转轴基座3，如图5所示，图5中示意出用于和转轴基座3连接的螺栓15，底座也可以固定于轴盖4，可以理解，底座也可以是转轴基座3或者轴盖4的一部分，例如一体设置于转轴基座3或轴盖4。图1、2中，可看出该手机的转轴机构100共设置两组沿转轴机构100长度方向布置的同步机构1，相应地设置两个旋转轴底座13，以安装每组同步机构1中的第一摆臂111、第二摆臂112、第一旋转轴121、第二旋转轴122、滑块14等部件，可知，设置一个旋转轴底座13以满足两组或者更多组的同步机构1的部件安装也可以。
同步机构1的第一旋转轴121和第二旋转轴122设于旋转轴底座13，第一旋转轴121和第二旋转轴122可以固定连接于旋转轴底座13，也可以转动 连接于旋转轴底座13，转动轴线与第一摆臂111、第二摆臂112的转动轴线保持一致即可。如图4、5所示，第一旋转轴121和第二旋转轴122通过旋转轴底座13约束，旋转轴底座13的左、右侧在长度方向的两端均设有套筒，可定义为第三套筒13a，旋转轴底座13的长度方向和转轴基座3的长度方向一致，即在旋转轴底座13的四个角部区域分别设置有第三套筒13a，这样，第一旋转轴121和第二旋转轴122可以沿各自的长度方向或者说沿各自的轴向分别插入旋转轴底座13对应侧的两个第三套筒13a内。继续参考图4，第一旋转轴121和第二旋转轴122的两个端部均穿出对应侧的第三套筒13a，可沿轴向限位于第三套筒13a，即仅能相对第三套筒13a转动，限位的具体方式例如是在旋转轴的端部设置限位部件，限位部件例如是锁紧螺母、锁紧盖等，抵接在第三套筒13a的端面即可，图5中第一旋转轴121和第二旋转轴122的一个端部为L型，由另一端部贯穿相应侧的两个第三套筒13a，L型的端部可以抵接在第三套筒13a的端面，从而形成限位，与L型的端部相对的另一个端部可以设置限位部件，或者L型的端部抵接到其他部件上以形成轴向的限位，则另一个端部无需设置限位部件，变于装配操作。
如图4所示，第一摆臂111和第二摆臂112在旋转轴底座13的中轴线左、右两侧对称布置，旋转轴底座13a的中轴线和转轴机构100的中轴线同轴。另外，第一摆臂111可以绕第一旋转轴121转动，第二摆臂112可以绕第二旋转轴122转动。此外，第一摆臂111和第二摆臂112分别与两侧的中框200连接，如前所述，可以设置与中框200固定的摆臂，以和转轴基座3实现转动连接，此时的第一摆臂111和第二摆臂112可以是与中框200固定连接的摆臂；也可定义与转轴基座3转动连接的摆臂为主摆臂，主摆臂与中框200固定连接，而第一摆臂111和第二摆臂112为副摆臂，副摆臂与中框200可移动地连接，具体是副摆臂相对主摆臂滑动连接，图4中第一摆臂111、第二摆臂112均设有长孔11d，可以在主摆臂上设置插入该长孔11d的轴部，轴部轴向限位于主摆臂，即第一摆臂111和第二摆臂112间接地连接到中框200，中框200和主摆臂在转动过程中，第一摆臂111和第二摆臂112相应地会转动并会和轴部发生沿长孔11d长度方向的滑动。
本实施例中同步机构的第一摆臂111、第二摆臂112与中框200的具体连接方式不做限制，只要第一摆臂111、第二摆臂112与中框200具有直接或间 接的连接关系，当第一摆臂111和第二摆臂112分别绕第一旋转轴121、第二旋转轴122旋转时，相应地带动中框200转动，或者中框200转动时相应地带动对应侧的摆臂转动，即具有转动的联动效应即可。
上述的同步机构还设有滑块14，滑块14沿平行于第一摆臂111、第二摆臂112转动的轴线方向滑动设置。本实施例中主要利用滑块14和第一摆臂111、第二摆臂112的相互配合实现两侧中框200的同步转动控制。
结合图6-8理解，图6为图4中同步机构的俯视图，并示出X、Y向；图7为图5中滑块14的示意图；图8为图5中第一摆臂111的结构示意图。
滑块14在沿第一摆臂111、第二摆臂112转动连接的轴线方向设置有滑动约束，图5中示意出的Y向即第一摆臂111、第二摆臂112转动的轴线方向，即设置滑动约束的滑块14仅可相对旋转轴底座13在Y向上滑动移动。具体在本实施例中，如图7所示，滑块14的两侧的上、下端均设有套筒，可定义为第一套筒14a，上、下端即沿Y向的两端。如图4所示，第一旋转轴121和第二旋转轴122分别穿过滑块14左、右侧的两个第一套筒14a，以形成滑动约束，即滑块14仅可沿第一旋转轴121、第二旋转轴122的轴线方向自由移动，如图6所示，滑块14仅可沿Y向移动。
如图8所示，以图8标注的上、下方向进行描述，上、下方向也是滑动方向，第一摆臂111以及第二摆臂112的上、下端也设有套筒，可定义为第二套筒11a，第一旋转轴121也穿过第一摆臂111的两个第二套筒11a，第二旋转轴112穿过第二摆臂112的两个第二套筒11a。可见，第一旋转轴121依次穿过旋转轴底座13上端的第三套筒13a、第一摆臂111上端的第二套筒11a、滑块14上端的第一套筒14a、滑块14下端的第一套筒14a、第一摆臂111下端的第二套筒11a、旋转轴底座13下端的第三套筒13a。图8中，一个第二套筒11a一个端部的一部分沿轴向延伸形成第一限位部11a1，也可参考图5理解，旋转轴底座13与之对应的第三套筒13a的一个端部的一部分沿轴向延伸形成第二限位部13a1，第一限位部11a1和第二限位部13a1都是小于半圆的弧形板，这样，当第二套筒11a和第三套筒13a沿轴向对接后，如果第一摆臂111和第二摆臂112相对旋转轴底座13转动并且转动到一定幅度时，第一限位部11a1和第二限位部13a1沿周向会抵接而限位，即用于限制第一摆臂111、第二摆臂112的摆动幅度，以避免过度转动，如图4所示，在完全展开状态下，第一 限位部11a1和第二限位部13a1处于抵接的状态，第一摆臂111和第二摆臂112无法继续沿展开的方向转动。
另外，第二套筒11a的内孔可以是扁孔，即孔壁具有平面部，图5中第一旋转轴121和第二旋转轴112的一端的周壁具有平面部，第一旋转轴121插入第二套筒11a后，二者的平面部相互配合，以限制二者的相对旋转，摆臂转动时带动相应的旋转轴转动。可知，旋转轴不随第二套筒11a转动也可以，第二套筒11a为圆孔，与旋转轴的圆柱段配合也是可行的方案。
本实施例中，滑块14左右两侧的第一套筒14a分别沿第一旋转轴121、第二旋转轴122滑动，第一摆臂111和第二摆臂112也分别沿第一旋转轴121、第二旋转轴122转动，即滑块14滑动轴与摆臂的旋转轴同心，二者共用同一轴件，即共用第一旋转轴121、第二旋转轴122，则约束公差链少，同步性更好，并且可节省零件和空间。可知，滑块14与第一摆臂111、第二摆臂112不共用轴件也可以，比如在第一旋转轴121、第二旋转轴122的内侧设置单独的轴件作为滑块14的滑动轴。需要说明，这里所述的套筒结构(包括第一套筒14a、第二套筒11a、第三套筒13a)主要是限制径向的移动，以进行Y向的滑动约束，因此，套筒并不限于是封闭的环状，也可以具有缺口，只要能够导向滑块沿Y向的滑动即可。实际上，滑块14沿第一旋转轴121、第二旋转轴122的Y向滑动也不限于是设置第一套筒14a，比如，第一旋转轴121和第二旋转轴122设置出滑槽，滑块14的两侧设置出能够在滑槽中沿Y向滑动的滑台也可以。
以上描述了滑块14仅能相对旋转轴底座13沿Y向移动，请继续参考图7，滑块14的两侧沿旋转轴底座13的中线对称设有第二配合部，具体是凸出部14b(或定义为滑动部)，即一侧的凸出部14b和另一侧的凸出部14b相对旋转轴底座13的中线对称设置，旋转轴底座13的中线平行于第一摆臂111、第二摆臂112的转动轴线，且与两个转动轴线的间距相等。凸出部14b可以是螺旋状的凸出部14b。第一摆臂111和第二摆臂朝向滑块14的一侧则分别设有第一配合部，第一摆臂111的第一配合部和第二摆臂112的第一配合部相对旋转轴底座13的中线对称设置。第一配合部具体是螺旋凹槽11b(或定义为螺旋滑槽)，螺旋凹槽11b可以是沉槽，也可以是通槽，如图9所示，螺旋凹槽11b和螺旋形的凸出部14b配合。具体地，图8中，第一摆臂111的两端为第二套 筒11a，中部设有突起11c，突起11c也为套筒结构，供第一旋转轴121贯穿，再如图4所示，第一旋转轴121依次穿过旋转轴底座13上端的第三套筒13a、第一摆臂111上端的第二套筒11a、滑块14上端的第一套筒14a、第一摆臂111中部的突起11c、滑块14下端的第一套筒14a、第一摆臂111下端的第二套筒11a、旋转轴底座13下端的第三套筒13a，第二旋转轴122参照理解，该结构非常节约空间，紧凑。
螺旋凹槽11b设置在第一摆臂111、第二摆臂112的突起11c上，突起11c和两端的第二套筒11a之间形成容纳空间，滑块14左侧两端的第一套筒14a位于第一摆臂111两端对应的容纳空间内，且滑块14的第一套筒14a沿Y向的长度小于容纳空间沿Y向的长度，这样可允许滑块14沿Y向移动，第一摆臂111和第二摆臂112对称布置，第二摆臂112与滑块14右侧的配合方式可参照前述第一摆臂111与滑块14左侧的配合方式理解。
再结合图5、6理解，滑块14左侧的凸出部14b插入于第一摆臂111的螺旋凹槽11b，滑块14右侧的凸出部14b插入于第二摆臂112的螺旋凹槽11b，当第一摆臂111、第二摆臂112绕各自的旋转轴转动时，螺旋凹槽11b随之转动，相应地会作用于螺旋形的凸出部14b，以带动滑块14沿Y向移动，滑块14移动时又会反向作用于螺旋凹槽11b，带动相应侧的第一摆臂111或第二摆臂112转动，从而保证两侧第一摆臂111、第二摆臂112的同步摆动，也就保证两侧中框200同步摆动，使得两侧中框200的转动夹角保持一致。此方案通过设置滑块与旋转摆臂机构通过凸出部和螺旋凹槽滑动配合，实现同步功能，相较于齿轮组的同步结构，可实现折叠屏等电子设备小尺寸要求下的同步机构尺寸进一步减小、零件数量精简，同时具有同步传动稳定、虚位量小的优势。
需要说明的是，该实施例中第一摆臂111和第二摆臂112在转动过程中，凸出部14b始终可以和螺旋凹槽11b的两侧槽侧壁11b2沿轴向抵接配合，由此形成滑块14滑动和摆臂转动的联动效应。可见，根据该原理，第一配合部并不限于是螺旋形的槽，只要转动过程中，槽的侧壁可以和凸出部14b沿轴向抵接配合即可，槽可以是直槽或者曲线槽。当然，螺旋凹槽11b与凸出部14b配合时，可保证滑块14、摆臂都可以更为稳定地动作。
本申请实施例中滑块14的第一套筒14a可以与第一旋转轴121、第二旋转轴122直接套合使用，滑块14无需增加其他滑动约束件，进一步减少了零 件数量，同时也缩小了公差连，可减小同步虚位。
进一步的，滑块14上的滑动约束设置在滑块14的角部区域，如图7所示，滑块14包括大致呈矩形的主体部14d，四个第一套筒14a悬设在主体部14d的两侧的两端，这样使得滑动约束之间X\Y向距离均尽量远，目的是减小滑块14在沿Y向滑动时传导同步运动上发生的旋转，从而降低卡涩、第一摆臂111和第二摆臂112不同步的风险。可以理解，仅设置一个第一套筒14a或者更多的第一套筒14a都可以。另外，螺旋的凸出部14b设置在滑块14的中部，即位于两端的第一套筒14a之间，凸出部14b利用了两个第一套筒14a之间的空间，没有额外增加滑块14的尺寸，有利于同步机构1整体尺寸减小；对应的，在第一摆臂111、第二摆臂112上设置有滑块14的第一套筒14a滑动的容纳空间，保证滑块14沿Y向移动时不与第一摆臂111、第二摆臂112发生干涉。同理，第一摆臂111和第二摆臂112的螺旋凹槽11b部设置在滑块14的上、下第一套筒14a之间，滑块14和第一摆臂111、第二摆臂112共用轴线方向的空间，节省尺寸空间。
本实施例中，凸出部14b插入在螺旋凹槽11b中，二者的相互作用本质在于，螺旋凹槽11b随第一摆臂111、第二摆臂112转动时，螺旋凹槽11b正对凸出部14b的部分在Y向的位置会发生变化，则螺旋凹槽11b的槽侧壁11b2会推动凸出部14b，继而带动滑块14在Y向移动，反之，凸出部14b沿Y向移动时，则凸出部14b也会推动螺旋凹槽11b的槽侧壁11b2，螺旋凹槽11b需要转动以调整到相应的位置和凸出部14b保持插入的关系，因此，螺旋凹槽11b设置为螺旋状，但凸出部14b并不限于是螺旋状，也可以是非螺旋状结构，比如半球型、圆柱形等。只要凸出部14b插入到螺旋凹槽11b内，且凸出部14b沿轴向的壁能够与螺旋凹槽11b的槽侧壁接触并发生相互推动作用即可。为此，凸出部14b沿Y向的宽度和螺旋凹槽11b在Y向的宽度应该大致相等，凸出部14b的宽度可以略小于螺旋凹槽11b的宽度，这样既保证二者能够始终相互作用，又不会干扰二者的相对运动。
另外，需要说明的是，螺旋为连续结构，鉴于滑块14的滑动行程设计，图5中，螺旋凹槽11b仅为一小段螺旋结构，沿Y向投影，螺旋凹槽11b的投影可以是圆环形，也可以是圆弧形，凸出部14b同样是一小段螺旋状结构，故从图5中显示的螺旋趋势并不明显。当然，根据需求，可以设置螺旋的连续 长度更长的螺旋凹槽11b，凸出部14b也可以设计为螺旋的连续长度更长，与螺旋凹槽11b接触的面更大。
请继续参考图9、10，图9为图1中在同步机构1的凸出部14b位置沿X向的剖视图，未示意转轴基座3；图10为图9中滑块14位置的放大图。
如图10所示，滑块14的凸出部14b相对第一旋转轴121、第二旋转轴122的轴心线(即轴线)对称设置，图10中，凸出部14b在厚度方向上朝向柔性折叠屏一侧的端面以及相反侧的端面，和第一旋转轴121、第二旋转轴122的轴心线的距离均为h，即以图10为视角，滑块14的凸出部14b在厚度方向上的中心位与第一旋转轴121、第二旋转轴122的轴心线处于同一高度或者说处于同一水平线，厚度方向即垂直于XY平面的方向。这样使得在第一摆臂111或第二摆臂112正反旋转时，施加到滑块14上的力是对称均等的，从而可减小滑块14卡涩的风险，而且也可以使正反转时手感力基本对称，以提升用户体验。可以理解，上述的处于同一高度并不要求理论上的完全高度相等，在满足设计需求的情况下，凸出部14b在厚度方向上的中心位与旋转轴的轴心线也可以存在高度上的偏差，偏差的范围可以是0～0.5mm，在该偏差范围内，仍可视为在同一高度上。
另外，如图7、8、10所示，凸出部14b朝向螺旋凹槽11b的表面14b1为与螺旋凹槽11b的槽底面11b1适配的螺旋曲面，这样可以更好地与螺旋凹槽11b呈螺旋曲面的槽底面11b1贴合，以更好地相互作用，提高传力的稳定性，相应地也就可以提高中框200转动过程中的稳定性。
再请看图11-13，图11为图1中在同步机构1的凸出部14b位置沿X向的剖视图，示意出轴盖；图12为图11中滑块14位置的放大图；图13为图1中同步机构1安装在旋转轴底座13和转轴基座3之间的立体示意图。
如前所述，手机包括支撑柔性折叠屏的转轴基座3，滑块14设置在旋转轴底座13和转轴基座3之间，并可在二者之间滑动，使得滑块14滑动的空间是在转轴机构100内部，不影响转轴基座3对柔性折叠屏屏幕的支撑，避免滑块14的滑动空间产生孔洞导致屏幕支撑性变差。而且转轴基座3将柔性折叠屏和同步机构1分开，避免折叠影响到同步机构1的运行和同步控制精度。
可以理解，滑块14也不限于设置在转轴基座3和旋转轴底座13之间，例如也可以设置旋转轴底座13和轴盖4之间，可以根据第一摆臂111、第二摆 臂112与旋转轴底座13的转动连接位置以及轴盖4和旋转轴底座13之间的空间尺寸等因素选择滑块14的具体位置。
以上滑块14设置的沿旋转轴底座13进行Y向滑动的滑动约束为第一套筒14a，第一套筒14a和第一旋转轴121、第二旋转轴122的套合实现Y向的约束，可知，并不限于此。如图7、13所示，滑块14朝向旋转轴底座13的底部设有凹槽14c，旋转轴底座13可沿Y向插入凹槽14c中，旋转轴底座13可以作为滑轨，滑块14可直接沿旋转轴底座13进行滑动，图13中，滑块14的顶部由转轴基座3进行限位，则滑块14的凹槽14c也为形成相对旋转轴底座13Y向滑动的滑动约束。本实施例中，滑块14设置的第一套筒14a与第一旋转轴121、第二旋转轴122套合形成一处滑动约束，滑块14还设置凹槽14c和旋转轴底座13滑动配合形成另一处滑动约束，从而保证滑动约束的效果，确保滑块14仅沿Y向移动。可知，此两处滑动约束仅设置其一也可以达到限制滑块14相对旋转轴底座13沿Y向移动的目的。
另外，如图14所示，图14为滑块14设置出燕尾槽以与旋转轴底座13配合的示意图。
进一步地，滑块14与旋转轴底座13之间可以设置成燕尾槽结构，即滑块14底部设置的凹槽14c为燕尾槽，旋转轴底座13顶部的左、右两侧相应地设置出凸起13b，与燕尾槽的形状匹配，这样进一步增加了滑块14在图14视角下厚度方向上的约束，即防止旋转轴底座13和滑块14在垂直于XY平面的方向脱离，进一步限制旋转自由度，滑动约束更为可靠，从而减小同步机构1控制过程中虚位量的产生，有利于提高同步控制精度。当然，根据实际产品的需求，可以调整滑动约束的具体位置、数量等。可以理解，在旋转轴底座13上设置凹槽，滑块14设置出沿凹槽滑动的滑台结构也可以。
另外，上述同步机构1的第一旋转轴121和第二旋转轴122连接在旋转轴底座13上，可知，直接安装在转轴基座3也是可以的，实际上，也可以不设置旋转轴底座13，本实施例主要是实现滑块14沿Y向滑动，第一旋转轴121、第二旋转轴122、第一摆臂111、第二摆臂112均可以直接设置到转轴基座3的底部，或者都安装在轴盖4，这里设置旋转轴底座13，位于轴盖4和转轴基座3之间，便于加工布置，结构较为紧凑，且旋转轴底座13可以支撑滑块14，滑块14还可以设置凹槽14c以沿旋转轴底座13滑动，使得滑块14的滑动较 为稳定。
上述实施例主要针对折叠屏手机进行说明，可知，不限于折叠屏手机，也可以是其他电子设备，不仅仅可应用于具有折叠屏的电子设备，只要电子设备具有相对同步转动的需求，都可以采用该种方案，比如电子设备可以是平板电脑，笔记本电脑，还可以是可穿戴设备、车载设备、增强现实(augmented reality，AR)/虚拟现实(virtual reality，VR)设备、超级移动个人计算机(ultra-mobile personal computer，UMPC)、上网本、个人数字助理(personal digital assistant，PDA)等移动终端，或者，也可以是数码相机、单反相机/微单相机、运动摄像机、云台相机、无人机等专业的拍摄设备等。
本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以对本申请进行若干改进和修饰，这些改进和修饰也落入本申请权利要求的保护范围内。

Claims (20)

  1. 一种同步机构，其特征在于，所述同步机构包括底座、滑块，以及位于所述滑块两侧的第一摆臂、第二摆臂，所述第一摆臂、所述第二摆臂均相对所述底座转动；
    所述滑块沿平行于所述第一摆臂、所述第二摆臂转动的轴线方向滑动设置；所述第一摆臂和所述第二摆臂均沿所述基座的中线对称设有第一配合部，所述滑块的两侧沿所述中线对称设有第二配合部，所述第二配合部与所述第一配合部对应；所述第一摆臂和所述第二摆臂相对转动时，所述第一配合部和所述第二配合部配合带动所述滑块沿所述轴线方向滑动，使得所述第一摆臂和所述第二摆臂相对于所述基座的转动夹角保持一致。
  2. 根据权利要求1所述的同步机构，其特征在于，所述同步机构还包括安装于所述底座的第一旋转轴和第二旋转轴，所述第一摆臂绕所述第一旋转轴转动，所述第二摆臂绕所述第二旋转轴转动，所述滑块沿所述第一旋转轴、所述第二旋转轴滑动。
  3. 根据权利要求2所述的同步机构，其特征在于，所述滑块的两侧均设有第一套筒，两侧的所述第一套筒分别外套所述第一旋转轴、所述第二旋转轴，所述滑块沿所述第一旋转轴、所述第二旋转轴滑动。
  4. 根据权利要求2所述的同步机构，其特征在于，所述滑块的两侧的所述第二配合部在厚度方向的中心位，与所述第一旋转轴、所述第二旋转轴的轴心线位于同一高度。
  5. 根据权利要求3所述的同步机构，其特征在于，所述滑块具有四个角部区域，四个所述角部区域均设有所述第一套筒，每侧的两个所述第一套筒之间设置有所述第二配合部。
  6. 根据权利要求5所述的同步机构，其特征在于，所述第一摆臂和所述第二摆臂的两端均设有第二套筒，且沿所述轴线方向的中部均设有突起，所述第一配合部设于所述突起，所述第一旋转轴和所述第二旋转轴分别贯穿对应的两个所述第二套筒和所述突起，所述第一套筒在所述第二套筒和所述突起之间滑动。
  7. 根据权利要求1至6任一项所述的同步机构，其特征在于，所述第一配合部为螺旋凹槽，所述第二配合部为凸出部。
  8. 根据权利要求7所述的同步机构，其特征在于，所述滑块的每一侧设有至少一个所述凸出部，每个所述凸出部对应一个所述螺旋凹槽；或一个所述螺旋凹槽对应一个以上的所述凸出部。
  9. 根据权利要求7所述的同步结构，其特征在于，所述凸出部朝向所述螺旋凹槽的表面为与所述螺旋凹槽的槽底面贴合的螺旋曲面。
  10. 根据权利要求7所述的同步结构，其特征在于，所述凸出部的宽度和所述螺旋凹槽的宽度大致相等。
  11. 根据权利要求2-10任一项所述的同步机构，其特征在于，所述底座 的两侧的两端均设有第三套筒，所述第一旋转轴和所述第二旋转轴插入对应侧的两个所述第三套筒。
  12. 根据权利要求11所述的同步机构，其特征在于，所述滑块和所述底座沿所述轴线方向滑动配合。
  13. 根据权利要求12所述的同步结构，其特征在于，所述滑块设于所述底座和所述转轴基座之间，所述滑块的底部设置有凹槽，所述凹槽与所述底座滑动配合；或，所述底座设有凹槽，所述滑块的底部设有与所述凹槽配合的滑台。
  14. 根据权利要求13所述的同步机构，其特征在于，所述凹槽为燕尾槽，所述底座或所述滑块设置有凸起，所述凸起与所述燕尾槽滑动配合。
  15. 一种转轴机构，包括转轴基座和轴盖，其特征在于，所述转轴基座和所述轴盖之间设有至少一组根据权利要求1-14任一项所述的同步机构。
  16. 根据权利要求15所述的转轴机构，其特征在于，所述底座设于所述转轴机构的轴盖和所述转轴基座之间。
  17. 根据权利要求16所述的转轴机构，其特征在于，所述底座与所述轴盖、所述转轴基座中的一者固定连接，或者一体设置。
  18. 根据权利要求15所述的转轴机构，其特征在于，所述转轴机构包括主摆臂和副摆臂，所述副摆臂与所述主摆臂滑动连接；所述第一摆臂和所述第二摆臂为所述主摆臂或所述副摆臂。
  19. 一种电子设备，其特征在于，包括柔性折叠屏、支撑所述柔性折叠屏的中框，以及权利要求15-18任一项所述的转轴机构。
  20. 根据权利要求19所述的电子设备，其特征在于，所述第一摆臂或所述第二摆臂与所述中框固定。
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