WO2023093860A1 - 转轴机构及电子设备 - Google Patents

转轴机构及电子设备 Download PDF

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Publication number
WO2023093860A1
WO2023093860A1 PCT/CN2022/134409 CN2022134409W WO2023093860A1 WO 2023093860 A1 WO2023093860 A1 WO 2023093860A1 CN 2022134409 W CN2022134409 W CN 2022134409W WO 2023093860 A1 WO2023093860 A1 WO 2023093860A1
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WO
WIPO (PCT)
Prior art keywords
rotating
arms
rotating shaft
middle frame
shaft mechanism
Prior art date
Application number
PCT/CN2022/134409
Other languages
English (en)
French (fr)
Inventor
林杨明
花蕾蕾
詹强
Original Assignee
华为技术有限公司
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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
Publication of WO2023093860A1 publication Critical patent/WO2023093860A1/zh

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    • 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
    • F16C11/045—Pivotal connections with at least a pair of arms pivoting relatively to at least one other arm, all arms being mounted on one pin
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/10—Arrangements for locking
    • 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
    • F16C11/10—Arrangements for locking
    • F16C11/103—Arrangements for locking frictionally clamped

Definitions

  • the present application relates to the technical field of electronic equipment, in particular to a rotating shaft mechanism and electronic equipment.
  • Foldable mobile terminals (such as foldable mobile phones, foldable tablets, foldable computers and other electronic devices) need to meet high reliability, better operating experience and appearance design.
  • the flexible screen is continuously foldable, and the flexible screen moves synchronously with the housing until it is folded, and there is a large amount of deformation at the bending part.
  • the two parts of the flexible screen are roughly parallel, so that the bent part has a relatively large curvature, resulting in obvious creases on the flexible screen. If the curvature of the bent part of the flexible screen is reduced through the relative translation of the two parts of the shell, it will seriously affect the appearance of the mobile terminal.
  • the present application provides a rotating shaft mechanism and electronic equipment to realize different rotation angles of the flexible screen and the casing.
  • the first aspect of the embodiments of the present application provides a hinge mechanism for a foldable electronic device
  • the electronic device includes a flexible screen and two casings
  • the casings include a casing and a middle frame
  • the two casings Rotatably connected
  • the middle frame is rotatably connected to the housing
  • the flexible screen is laid on the surface of the middle frame, including a base, a first driving part, a guide part and a second driving part.
  • the first driving part includes a fixing member and two first rotating arms, the two first rotating arms are distributed on both sides of the base, the fixing member is fixed to the base, and each of the first rotating arms One end of a rotating arm is rotatably connected to the fixing member, and the other end is used to be fixedly connected to the middle frame, and the first rotating arm includes a first sliding part.
  • the guide part includes two guide blocks, each of the guide blocks is rotatably connected to the base, and each of the guide blocks corresponds to one of the first rotating arms on the same side, and the guide blocks include The first sliding part is slidably matched with the second sliding part, the first sliding part and the second sliding part cooperate to guide the relative movement between the guide block and the first rotating arm, and the guide block also includes The third sliding part.
  • the second driving part includes two second rotating arms, the second rotating arms are used to be fixedly connected with the housing, the two second rotating arms are distributed on both sides of the base, each of the The second rotating arm corresponds to one of the guide blocks on the same side, the second rotating arm includes a fourth sliding part slidingly fitted with the third sliding part, the third sliding part and the fourth sliding part The part cooperates to guide the relative movement between the guide block and the second rotating arm.
  • the two second rotating arms rotate relatively from the first relative position to the second relative position, they can drive the two shells to transform from unfolding to folding, and the guide part drives the two first rotating arms to rotate relatively , and the relative rotation angle of the two first rotation arms is greater than the relative rotation angle of the two second rotation arms.
  • the two middle frames are coplanar, and when the two shells are folded, the ends of the two middle frames close to the base are flaring.
  • the first rotating arm and the second rotating arm are linked through the guide part, and the first rotating arm and the second rotating arm can rotate synchronously.
  • the rotation angles of the first rotation arm and the second rotation arm are different.
  • the rotation angle of the first rotation arm is larger than the rotation angle of the second rotation arm, so that when the shell driven by the second rotation arm is rotated to fold, the second rotation arm
  • the middle frame driven by the two rotating arms can have a certain angle, that is, the middle frame has a flared shape at the end close to the base, so that the flexible screen connected to the middle frame can realize a large arc transition at the bending point. It can reduce the wrinkles of the flexible screen and alleviate the crease light and shadow phenomenon of the flexible screen.
  • the middle frame is in a flared shape at the end close to the base, that is, the relative distance between the two middle frames at the end close to the base is greater than the relative distance between the two middle frames at the end away from the base.
  • the first rotating arm is provided with an arc-shaped groove
  • the fixing member is provided with an arc-shaped block.
  • the arc-shaped block is slidably matched with the arc-shaped groove, so that the first rotating arm is rotationally connected with the fixing member.
  • the rotating shaft mechanism can realize the rotational connection between the first rotating arm and the fixing member through the sliding fit of the arc-shaped block and the arc-shaped groove.
  • both the arc-shaped block and the arc-shaped groove can be set as inferior arcs, so that the middle frame can be arranged at a position below the rotating shaft where the first rotating arm and the fixing member rotate relative to each other, and the first rotating arm can drive the middle frame to perform a 90° The above sharp rotation.
  • one of the first sliding part and the second sliding part is a first sliding groove, and the other is a first sliding block; the third sliding One of the part and the fourth sliding part is the second chute, and the other is the second slider.
  • the first chute and the second chute of the rotating shaft mechanism can be set according to the required relative motion relationship between the first rotating arm and the second rotating arm. After the shapes of the first chute and the second chute are determined, when the second rotating arm rotates, the guide block can drive the first rotating arm to move along a preset track.
  • the form of the slider and the chute facilitates the assembly of the first drive part, the guide part and the second drive part.
  • the first chute includes a continuous first segment and a second segment
  • the second chute includes a continuous third segment and a fourth segment.
  • the rotation speeds of the first rotating arm and the second rotating arm are substantially the same.
  • the difference between the rotation speeds of the first rotating arm and the second rotating arm is within 5%.
  • the relative movement of the middle frame driven by the first rotating arm and the outer shell driven by the second rotating arm is smoother and more stable, making it difficult for the user to observe the relative movement, which can make the process of unfolding and folding more beautiful.
  • the relative rotation of the first rotating arm and the second rotating arm is controlled by the sliding of the first slider in the second section and the sliding of the second slider in the fourth section.
  • the rotation speed of the first rotating arm is always greater than that of the second rotating arm, so that the overall speed of the first rotating arm is realized.
  • the rotation angle is larger than the total rotation angle of the second rotation arm, so that the relative movement between the first rotation arm and the second rotation arm is smoother and more stable.
  • the rotating shaft mechanism further includes a synchronization component.
  • the synchronous assembly is in transmission connection with the two guide blocks, and is used to realize synchronous and reverse rotation of the two guide blocks.
  • the synchronous component makes the two guide blocks move synchronously and reversely, and can also drive the two first rotating arms to move synchronously, and the two second rotating arms to move synchronously.
  • the synchronization assembly includes two meshing synchronization gears.
  • the two synchronous gears correspond to the two guide blocks one by one, and the synchronous gears are fixedly connected to the corresponding guide blocks.
  • the synchronous movement of the two guide blocks is realized through the meshing of the two synchronous gears, so that the synchronous transmission of the two guide blocks is more stable, and the two synchronous gears are not easy to slip, so that the two guide blocks The synchronized movement of the blocks is less prone to failure.
  • the synchronization assembly further includes an even number of linkage gears, and two of the synchronization gears mesh through the even number of linkage gears.
  • the pitch circles of the synchronization gear and the linkage gear can be designed to be smaller and do not occupy space.
  • the rotating shaft mechanism further includes a damping assembly.
  • the damping assembly is in transmission connection with the guide block, and is used for providing a damping force when the two guide blocks rotate relative to each other.
  • the damping force provided by the damping assembly can stabilize the two second rotating arms at the first relative position and/or the second relative position.
  • the damping assembly includes a first cam member, a second cam member, and a damping elastic member.
  • a first protrusion is provided on a side of the first cam member facing the second cam member, and a first groove is provided on the second cam to cooperate with the first protrusion.
  • One of the first cam member and the second cam member is connected to the base in a limited position in the circumferential direction, and the other is in transmission cooperation with the guide block, and can rotate synchronously with the guide block.
  • the damping elastic member is used for the elastic force that the first cam member and the second cam member are relatively close to each other. During the relative rotation of the two second rotating arms from the first relative position to the second relative position, the first protrusion slides out of the first groove.
  • the damping assembly is in the form of cooperation between the first protrusion and the first groove, so that when the two second rotating arms are located at the first relative position, the two second rotating arms can be relatively stable in the first position.
  • a relative position at the same time, the two first rotating arms can also have a relatively stable relative position.
  • a certain torque needs to be applied to the two second rotating arms to overcome the elastic force of the damping elastic member and allow the first protrusion to slide out of the first groove. That is, a certain torque needs to be applied to make the two second rotating arms break away from the first relative position and move toward the second relative position.
  • a second protrusion is provided on a side of the first cam member facing the second cam member, and a second protrusion is provided on the second cam to cooperate with the second protrusion. the second groove. During the relative rotation of the two second rotating arms from the second relative position to the first relative position, the second protrusion slides out of the second groove.
  • the damping assembly is in the form of cooperation between the second protrusion and the second groove, so that when the two second rotating arms are located at the second relative position, the two second rotating arms can be relatively stable in the first position.
  • Two relative positions, at the same time, the two first rotating arms can also have a relatively stable relative position. It is necessary to apply a certain torque to the two second rotating arms to overcome the elastic force of the damping elastic member and allow the second protrusion to slide out of the second groove. That is, a certain torque needs to be applied to make the two second rotating arms break away from the second relative position and move toward the first relative position.
  • the hinge mechanism further includes two screen elastic pieces, one end of which is connected to the guide block, and the other end is used to connect to the middle frame, and the screen elastic piece The elastic member makes the middle frame have a tendency to move away from the guide block.
  • the elastic member of the screen makes the two middle frames tend to be relatively far away, thereby tensioning the flexible screen on the middle frame, so that the flexible screen remains in a flat state. This can facilitate the installation of the flexible screen and maintain the flatness of the flexible screen when the housing is unfolded.
  • a second aspect of the embodiments of the present application provides an electronic device, including a flexible screen, the hinge mechanism provided in any implementation manner in the first aspect, and two casings.
  • the casing includes an outer shell and a middle frame, the two outer shells are rotatably connected, and the middle frame is rotatably connected to the outer shell.
  • a part of the flexible screen is connected to one of the middle frames, and another part is connected to the other middle frame.
  • One of the first rotating arms in the rotating shaft mechanism is fixedly connected with one of the middle frames, and the other first rotating arm is fixedly connected with the other of the middle frames.
  • One of the second rotating arms in the rotating shaft mechanism is fixedly connected to one of the housings, and the other second rotating arm is fixedly connected to the other housing.
  • the rotation of the two casings is controlled by the rotating shaft mechanism, so that the casing and the middle frame have different rotation angles.
  • the middle frame is connected to the flexible screen.
  • the housing further includes a rotating shaft.
  • the rotating shaft is rotatably arranged at the end of the casing away from the rotating shaft mechanism, and the middle frame is rotatably engaged with the rotating shaft.
  • the relative rotation of the outer shell and the middle frame is realized through a separate rotating shaft, thereby facilitating the assembly of the outer shell and the middle frame.
  • FIG. 1 is a schematic structural diagram of a foldable mobile terminal, with two casings in a folded state.
  • Fig. 2 is an exploded view of an electronic device provided by an embodiment of the present application.
  • the two casings are in the unfolded state
  • the flexible screen is in the unfolded state
  • the rotating shaft mechanism corresponds to the unfolded state of the flexible screen, that is, the two second rotating arms are in the first relative position.
  • Fig. 3 is an exploded view of an electronic device provided by an embodiment of the present application. Wherein, the two casings are in the unfolded state, the flexible screen is in the folded state, and the rotating shaft mechanism corresponds to the folded state of the flexible screen, that is, the two second rotating arms are in the second relative position.
  • Fig. 4 is an exploded view of a rotating shaft mechanism provided by an embodiment of the present application.
  • Fig. 5 is a schematic structural diagram of the first driving part provided by an embodiment of the present application, and the two first rotating arms are in an unfolded state.
  • Fig. 6 is a schematic structural diagram of the first driving part provided by an embodiment of the present application, and the two first rotating arms are in a folded state.
  • Fig. 7 is a schematic structural diagram of a first rotating arm provided by an embodiment of the present application.
  • FIG. 8 is a partially enlarged view of area A in FIG. 4 .
  • FIG. 9 is a partially enlarged view of area B in FIG. 4 .
  • the first middle frame 053a The first middle frame 053a
  • Arc block 211 Arc block 211
  • the first slider 311 The first slider 311
  • first”, second, etc. are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first”, “second”, etc. may expressly or implicitly include one or more of that feature.
  • plural means two or more. Orientation terms such as “upper”, “lower”, “left”, and “right” are defined relative to the schematic placement of components in the drawings. It should be understood that these directional terms are relative concepts, and they are used With respect to description and clarification relative to it, it may change correspondingly according to the change of orientation of parts placed in the drawings.
  • connection should be understood in a broad sense, for example, “connection” can be a fixed connection, a detachable connection, or an integral body; it can be directly or indirectly through an intermediary.
  • connection can be a fixed connection, a detachable connection, or an integral body; it can be directly or indirectly through an intermediary.
  • connection can be a fixed connection, a detachable connection, or an integral body; it can be directly or indirectly through an intermediary.
  • and/or includes any and all combinations of one or more of the associated listed items.
  • FIG. 1 shows a schematic structural diagram of a foldable mobile terminal, and two casings 050 are in a folded state.
  • the hinge mechanism 030 provided by the embodiment of the present application can be applied in a foldable mobile terminal 001.
  • foldable includes two parts that rotate relatively. way of changing its own shape.
  • the user can fold and unfold the mobile terminal 001 to meet different requirements of the user.
  • the user needs to carry the mobile terminal 001 with him, he can fold it to reduce its volume and improve portability.
  • the user When the user is using the mobile terminal 001, it can be unfolded to provide a larger display area and operation area, thereby improving the convenience of use.
  • the types of mobile terminals 001 can be divided into multiple types, for example, they can specifically be mobile phones, tablet computers, notebook computers, e-books and the like.
  • the mobile phone may include two housings 050 connected by a rotating shaft mechanism 030 , and under the action of the rotating shaft mechanism 030 , relative rotation and movement can occur between the two housings 050 .
  • the housing 050 includes a shell and a middle frame.
  • the middle frame is set on the inside of the shell.
  • a flexible screen (such as an OLED screen) can be set on the surfaces of the two middle frames.
  • the two shells 050 are set on the surface of the flexible screen. Roughly flush, the flexible screens are tiled on the surfaces of the two casings 050, providing a larger display area and operating area to improve usability.
  • the flexible screen When the mobile phone is folded, the flexible screen is also bent, and the flexible screen can be wrapped between the hinge mechanism 030 and the two casings 050 to provide good protection for the flexible screen and prevent the flexible screen from being damaged by external force , to improve the security performance of the mobile phone.
  • the flexible screen and the shell move synchronously, when the two shells move 180° relative to each other from unfolding to folding, the two parts of the flexible screen also move 180° relative to each other, which will cause the bending position of the flexible screen to be parallel, and a radius will appear in the bent part
  • the very small arc transition leads to high local stress on the flexible screen, and obvious creases will be formed after repeated bending.
  • Fig. 2 shows an exploded view of an electronic device in an embodiment of the present application.
  • the two casings 050 are in the unfolded state
  • the flexible screen 010 is in the unfolded state
  • the rotating shaft mechanism 030 corresponds to the unfolded state of the flexible screen 010, that is, the two second rotating arms 410 are in the first relative position.
  • Fig. 3 shows an exploded view of an electronic device in an embodiment of the present application.
  • the two housings 050 are in the unfolded state
  • the flexible screen 010 is in the folded state
  • the hinge mechanism 030 corresponds to the folded state of the flexible screen 010, that is, the two second rotating arms 410 are in the second relative position.
  • this electronic device is a mobile phone.
  • This electronic device includes a flexible screen 010 , a hinge mechanism 030 and two casings 050 .
  • the two housings 050 are arranged symmetrically on both sides of the rotating shaft mechanism 030 , and the rotating shaft mechanism 030 drives the two housings 050 to rotate relative to each other.
  • Each casing 050 includes an outer shell 051 and a middle frame 053 (transparency treatment in the figure), the outer shell 051 has an accommodating cavity, and the middle frame 053 is arranged at the opening of the accommodating cavity.
  • the casing 050 also includes a rotating shaft 055.
  • the end of the casing 051 away from the rotating shaft mechanism 030 is provided with a guide groove.
  • the rotating shaft 055 is rotatably matched with the casing 051 through the guiding groove.
  • the outer casing 051 is rotatably engaged with the middle frame 053 through the rotating shaft 055 . With the relative rotation of the middle frame 053 and the outer shell 051 , the side of the middle frame 053 close to the rotating shaft mechanism 030 can sink into the accommodating cavity.
  • the two casings 050 are respectively named as a first casing 050a and a second casing 050b.
  • the shell 051 of the first housing 050a is the first shell 051a
  • the middle frame 053 of the first shell 050a is the first middle frame 053a.
  • the shell 051 of the second shell 050b is the second shell 051b
  • the middle frame 053 of the second shell 050b is the second middle frame 053b.
  • the flexible screen 010 is fixed on the side of the middle frame 053 away from the accommodating cavity.
  • a part of the flexible screen 010 is fixed to the first middle frame 053a, and the other part is fixed to the second middle frame 053b.
  • the guide groove also has a certain amount of extension from close to the rotating shaft mechanism 030 to away from the rotating shaft mechanism 030, and the rotating shaft 055 can slide in the guiding groove, so that the middle frame 053 can also approach or move away from the rotating shaft mechanism 030. Due to the characteristic that the middle frame 053 can be relatively close to or away from the rotating shaft mechanism 030, the installation of the flexible screen 010 can be facilitated, so that the flexible screen 010 can be unfolded smoothly.
  • Fig. 4 shows an exploded view of the rotating shaft mechanism 030 in an embodiment of the present application.
  • the rotating shaft mechanism 030 includes a base 100 , a first driving part 200 , a guide part 300 and a second driving part 400 .
  • the base 100 is roughly strip-shaped, and the base 100 has an installation cavity, and the first driving part 200 , the guide part 300 and the second driving part 400 are at least partially accommodated in the installation cavity.
  • the first housing 051a has a first backplane
  • the second housing 051b has a second backplane. 010 side.
  • the first casing 050a and the second casing 050b are unfolded, the first backplane, the base 100 and the second backplane are continuous, so that the electronic device has a better appearance, and at the same time, the electronic device has a better appearance. Dustproof performance.
  • FIG. 5 shows a schematic structural diagram of the first driving part 200 in an embodiment of the present application, and the two first rotating arms 230 are in an unfolded state.
  • FIG. 6 shows a schematic structural diagram of the first driving part 200 in an embodiment of the present application, and the two first rotating arms 230 are in a folded state.
  • the first driving part 200 includes a fixing member 210 and two first rotating arms 230 .
  • the fixing member 210 is fixedly connected with the base 100 through the first bolt 250 .
  • the fixing part 210 is provided with two arc-shaped blocks 211 , and the two arc-shaped blocks 211 are symmetrically located on both sides of the fixing part 210 .
  • the first rotating arm 230 is provided with an arc-shaped groove 231, and the arc-shaped block 211 is slidably arranged in the arc-shaped groove 231, and the arc-shaped block 211 slides in the arc-shaped groove 231, so that the first rotating arm 230 can be relatively fixed.
  • 210 turns.
  • the form of the arc groove 231 and the arc block 211 makes the rotation axis of the first rotating arm 230 around the fixing member 210 outside the fixing member 210 .
  • the end of the first rotating arm 230 away from the fixing member 210 is fixedly connected to the middle frame 053 through the second bolt 270 .
  • the first rotating arm 230 rotates relative to the fixing member 210 , it drives the middle frame 053 to rotate relative to the fixing member 210 .
  • the first rotating arm 230 includes a first sliding part, and the first sliding part is disposed close to the guiding part 300 for driving the guiding part 300 to move.
  • the guide part 300 includes a first mounting base 110 and two guide blocks 310, the first mounting base 110 is fixedly connected with the base 100, and the guide blocks 310 are rotatably engaged with the first mounting base 110, so that the guide blocks 310 is rotatably connected with the base 100 .
  • Each guide block 310 corresponds to a first rotating arm 230 .
  • the guide block 310 includes a second sliding part, and the second sliding part is slidingly matched with the first sliding part.
  • the first sliding part is the first sliding groove 233
  • the second sliding part is the first sliding block 311 .
  • the first sliding groove 233 extends from the direction close to the fixing member 210 to away from the fixing member 210
  • the first sliding block 311 is a cylindrical sliding block
  • the first sliding block 311 can not only slide along the extending direction of the first sliding groove 233, but also Rotate in the first chute 233 .
  • the first rotating arm 230 rotates relative to the fixing member 210
  • the first sliding block 311 slides in the first sliding slot 233 to drive the guiding part 300 to rotate relative to the base 100 .
  • the guide block 310 further includes a third sliding portion, which is located on a side of the guide block 310 away from the first rotating arm 230 and used to drive the second driving portion 400 to move.
  • the second driving part 400 includes two second rotating arms 410 .
  • Each second rotating arm 410 corresponds to one guide block 310 .
  • the second rotating arm 410 includes a fourth sliding part, and the fourth sliding part is slidingly matched with the third sliding part.
  • the third sliding part is the second sliding block 313
  • the fourth sliding part is the second sliding groove 411 .
  • the first sliding slot 233 extends from the direction close to the base 100 to away from the base 100
  • the second sliding block 313 is a cylindrical sliding block
  • the second sliding block 313 can not only slide along the extending direction of the second sliding slot 411, but also Rotate in the second chute 411.
  • the guide block 310 rotates relative to the base 100
  • the second sliding block 313 slides in the second slot 411 to drive the second rotating arm 410 to rotate relative to the base 100 .
  • Fig. 7 shows a schematic structural diagram of the first rotating arm 230 in an embodiment of the present application.
  • the shape design of the first sliding slot 233 and the second sliding slot 411 can control the relative rotation speed of the first rotating arm 230 and the second rotating arm 410 .
  • the first chute 233 includes a continuous first section 2331 and a second section 2333
  • the second chute 411 includes a continuous third section 4111 and a fourth section 4113 .
  • the third section 4111 and the fourth section 4113 extend in the same direction, that is, the entire second chute 411 extends along the same straight line, and the angle of the first section 2331 and the second section 2333 in the first chute 233 is set to control the first Relative movement speed of the rotating arm 230 and the second rotating arm 410 . In this way, the design difficulty can be reduced, and the movement of the second rotating arm 410 can be made smoother.
  • the two second rotating arms 410 are in a first relative position.
  • the two second rotating arms 410 are in a second relative position.
  • the first slider 311 moves from the end of the first segment 2331 away from the second segment 2333 to the The second section 2333 moves away from the end of the first section 2331
  • the second slider 313 moves from the end of the third section 4111 away from the fourth section 4113 to the end of the fourth section 4113 away from the third section 4111 .
  • the rotation speed of the first rotating arm 230 is substantially equal to the rotating speed of the second rotating arm 410 .
  • the difference between the rotation speed of the first rotation arm 230 and the rotation speed of the second rotation arm 410 is not more than 5%, so that the middle frame 053 driven by the first rotation arm 230 and the outer casing 051 driven by the second rotation arm 410 have approximately same rotation speed.
  • the parallel between the first middle frame 053a and the first backplane can be kept, and the second middle frame 053b parallel to the second backplane.
  • the viewing angle effect of the user is: the flexible screen 010 fixed on the surface of the middle frame 053 moves synchronously with the casing 051, and the folding process of the entire electronic device appears very smooth.
  • the second slider 313 enters the fourth section 4113 .
  • the rotation speed of the first rotating arm 230 is greater than that of the second rotating arm 410 . Therefore, when the first rotating arm 230 rotates at a certain angle, the second rotating arm 410 will rotate at a smaller angle. That is, when the second rotating arm 410 rotates at a certain angle, the first rotating arm 230 will rotate at a larger angle.
  • the second rotating arm 410 drives the housing 051 to rotate until it is folded, the first housing 051a and the second housing 051b contact and accommodate the flexible screen 010, and at this time the second rotating arm 410 moves from the first relative position to the second relative position by an angle of rotation Roughly 90°. That is, one second rotating arm 410 drives the first housing 051a to rotate approximately 90°, and the other second rotating arm 410 drives the second housing 051b to rotate approximately 90°, and the first housing 051a and the second housing 051b are converted from the unfolded state to folded state.
  • the angle at which the second rotating arm 410 drives the middle frame 053 to rotate is greater than 90°, so that the first The middle frame 053 a and the second middle frame 053 b are in an open state from a direction away from the base 100 to close to the base 100 .
  • the bending position of the flexible screen 010 that is, the position where the flexible screen 010 is close to the base 100 can have a bending angle with a large radius, thereby reducing the local curvature of the flexible screen 010, reducing the wrinkles of the flexible screen 010, and alleviating the bending angle of the flexible screen 010. crease light and shadow phenomenon.
  • the flexible screen 010 can be further approached to the base 100 .
  • the form of the arc groove 231 and the arc block 211 can avoid the problem of positional conflict between the flexible screen 010 and the physical shaft.
  • first sliding part and the second sliding part can also be set as follows: the first sliding part is the first sliding block 311, and the second sliding part is the first slide groove 233, and the first rotating arm 230 and the guide can also be controlled Relative movement of block 310 .
  • the third sliding part and the fourth sliding part can also be set as follows: the third sliding part is the second sliding groove 411, and the fourth sliding part is the second sliding groove 411, and the second rotating arm 410 and the guide can also be controlled Relative movement of block 310 .
  • the driving sequence of such electronic devices can also be understood as the reverse sequence. That is, the second rotating arm 410 drives the movement of the guide block 310 through the cooperation of the third sliding part and the fourth sliding part, and the guiding block 310 drives the movement of the first rotating arm 230 through the cooperation of the first sliding part and the second sliding part .
  • Two sets of first drive parts 200 , two sets of guide parts 300 and two sets of second drive parts 400 are provided in the electronic device, corresponding to two ends of the base 100 .
  • the forces on the shell 051 and the middle frame 053 are more balanced.
  • the second rotating arms 410 of the two groups of second driving parts 400 are fixedly connected through the door panel 500 . That is, the second rotating arms 410 of the two groups of second driving parts 400 close to the first housing 050a are fixedly connected through a door panel 500, and the second rotating arms 410 of the two groups of second driving parts 400 close to the second housing 050b are connected through another door panel 500.
  • the door panels 500 are fixedly connected to increase the integrity of the two sets of second driving parts 400 and also increase the strength of the second rotating arm 410 .
  • the rotating shaft mechanism 030 also includes a synchronizing component.
  • the synchronization assembly includes two synchronization gears 610 and two linkage gears 630 .
  • the synchronous gear 610 is integrally formed with the guide block 310 , and the axis of the synchronous gear 610 is coaxial with the rotation axis of the guide block 310 , that is, the guide block 310 rotates around the axis of the synchronous gear 610 .
  • the synchronous gear 610 close to the first housing 050 a is named as the first synchronous gear 610
  • the synchronous gear 610 close to the second housing 050 b is named as the second synchronous gear 610 .
  • the linkage gear 630 close to the first housing 050 a is named as the first linkage gear 630
  • the linkage gear 630 close to the second housing 050 b is named as the second linkage gear 630 .
  • Two linkage gears 630 are located between the two synchronization gears 610, the first linkage gear 610 meshes with the first linkage gear 630, the first linkage gear 630 meshes with the second linkage gear 630, the second linkage gear 630 meshes with the second synchronization gear 610 engagement.
  • the fixing part 210 is provided with two sockets, and the linkage gear 630 is rotatably matched with the fixing part 210 through the sockets on the fixing part 210 .
  • the first mounting base 110 is also provided with an insertion hole corresponding to the linkage gear 630 , and the linkage gear 630 is rotatably engaged with the first installation base 110 through the insertion hole on the first installation base 110 .
  • the relative position of the first installation seat 110 and the base 100 can be fixed by the fixing member 210 and the linkage gear 630 .
  • the first mounting base 110 is also provided with a jack corresponding to the synchronous gear 610, and the synchronous gear 610 is rotatably matched with the first mounting base 110 through the jack on the first mounting base 110, that is, the synchronization gear 610 and the base are realized. 100'' swivel fit.
  • the first linkage gear 630 rotates, the first linkage gear 630 drives the second linkage gear 630 to rotate, and the second linkage gear 630 drives the second synchronous gear 610 to rotate. Since there are an even number of linkage gears 630 between the first synchronous gear 610 and the second synchronous gear 610 , the rotation directions of the first synchronous gear 610 and the second synchronous gear 610 are just opposite. Therefore, when one guide block 310 is rotated, the other guide block 310 can be rotated in reverse simultaneously.
  • the synchronous assembly makes the two guide blocks 310 rotate synchronously and reversely, correspondingly, the two first rotating arms 230 also rotate synchronously reversely, and the two second rotating arms 410 also rotate synchronously reversely, the first housing 051a and the second housing 051a
  • the two shells 051b rotate synchronously and reversely, and the first middle frame 053a and the second middle frame 053b rotate synchronously and reversely.
  • the pitch circle diameter of each gear can be designed to be small, and the installation cavity space of the base 100 can be reasonably utilized.
  • the number of linkage gears 630 can also be four, six or other even numbers, so that the two synchronization gears 610 can rotate synchronously and reversely.
  • FIG. 8 shows a partially enlarged view of area A in FIG. 4 .
  • FIG. 9 shows a partially enlarged view of area B in FIG. 4 .
  • the rotating shaft mechanism 030 further includes a damping assembly, which is connected with the guide block 310 and used to provide a damping force when the two guide blocks 310 rotate relative to each other.
  • the damping assembly includes a first cam member 710 , a second cam member 730 and a damping elastic member 750 .
  • a first protrusion 711 and a second protrusion 713 are disposed on a side of the first cam member 710 facing the second cam member 730 .
  • the second cam is provided with a first groove 731 and a second groove 733 , the first groove 731 cooperates with the first protrusion 711 , and the second groove 733 cooperates with the second protrusion 713 .
  • the first cam member 710 is drivingly matched with the guide block 310 , and when the guide block 310 rotates, the first cam member 710 rotates synchronously.
  • the second cam member 730 is in limited fit with the first mounting seat 110 in a circumferential direction, and the second cam member 730 can be relatively close to or far away from the first cam member 710 .
  • the damping elastic member 750 is a compression spring, one end of the damping elastic member 750 acts on the second cam member 730 , and the other end acts on the second mounting seat 130 , and the second mounting seat 130 is fixedly connected to the base 100 .
  • the elastic force of the damping elastic member 750 acts on the second cam member 730 so that the second cam member 730 tends to approach the first cam member 710 .
  • each second cam part 730 corresponds to a linkage gear 630 or a synchronous gear 610, so the rotation axes of any two second cam parts 730 are parallel but not coaxial, and in all After the second cam members 730 are fixedly connected, any second cam member 730 cannot rotate around its own axis, but can slide along its axis.
  • the first protrusion 711 is inside the first groove 731 .
  • the first protrusion 711 slides out of the first groove 731, and the elastic force provided by the damping elastic member 750 is transformed into preventing The damping force of the first protrusion 711 sliding out of the first groove 731 can improve the user's experience when folding the electronic device.
  • the second protrusion 713 is inside the second groove 733 .
  • the second protrusion 713 slides out from the second groove 733, and the elastic force provided by the damping elastic member 750 is transformed into preventing The damping force of the second protrusion 713 sliding out of the second groove 733 can improve the user's experience when unfolding the electronic device.
  • the electronic device also includes two screen elastic members 800, and the screen elastic members 800 are compression springs.
  • One end of the screen elastic member 800 is connected to the guide block 310 , and the other end is connected to the middle frame 053 .
  • the screen elastic member 800 makes the middle frame 053 have a tendency to move away from the guide block 310 . Under the action of the guide groove, the middle frame 053 can move relative to the outer shell 051 , and get relatively close to or away from the guide block 310 to a certain extent.
  • the flexible screen 010 When installing the flexible screen 010 through the middle frame 053, the flexible screen 010 can be fixed at the position where the middle frame 053 is relatively close to the guide block 310, and then the middle frame 053 is kept away from the guide block 310 by the elasticity of the screen elastic member 800. During this process The flexible screen 010 is unfolded to reduce wrinkles of the flexible screen 010 .
  • the rotating shaft 055 can also slide relative to the housing 051 without a guide groove.
  • a sliding block can be provided on the casing 051 , and the sliding block can slide on the casing 051 to approach or move away from the rotating shaft mechanism 030 .
  • the rotating shaft 055 is rotatably matched with the sliding block, so as to realize the relative displacement between the rotating shaft 055 and the housing 051 .
  • the rotation of the two casings 050 is controlled by the rotating shaft mechanism 030, so that the casing 051 and the middle frame 053 have different rotation angles.
  • the middle frame 053 is connected to the flexible screen 010.
  • the two shells 051 are rotated to fold, that is, when the two shells 051 form an angle of 180°, since the rotation angle of the middle frame 053 is greater than that of the shell 051, the inside of the middle frame 053
  • the flexible screen 010 has an included angle greater than 180° at the bend, and the middle frame 053 and the outer shell 051 rotate a certain angle to match the angle difference between the outer shell 051 and the middle frame 053, so that the flexible screen 010 can be bent at the bend. Realize a smooth transition, reduce the folds of the flexible screen 010, and alleviate the crease light and shadow phenomenon of the flexible screen 010.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Telephone Set Structure (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

一种转轴机构（030）及电子设备，其中转轴机构包括基座（100）、第一驱动部（200）、导向部（300）和第二驱动部（400）。基座包括固定件（210）和两个第一转动臂（230），固定件与基座固定，每个第一转动臂的一端与固定件转动连接，另一端与中框（053）固定连接。导向部包括两个导向块（310），每个导向块与基座转动连接，每个导向块与一个第一转动臂对应，导向块与第一转动臂联动；第二驱动部包括两个第二转动臂（410），第二转动臂用于与外壳（051）固定连接，第二转动臂与导向块联动。两个第二转动臂相对转动时，能够带动两个外壳从展开向折叠转换，导向部带动两个第一转动臂相对转动，且两个第一转动臂的相对转动角度大于两个第二转动臂的相对转动角度。转轴机构带动中框与外壳实现不同的转动角度。

Description

转轴机构及电子设备
相关申请的交叉引用
本申请要求在2021年11月29日提交中国专利局、申请号为202111473512.6、申请名称为“转轴机构及电子设备”的中国专利的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电子设备技术领域，尤其涉及一种转轴机构及电子设备。
背景技术
可折叠的移动终端(如折叠手机、折叠平板、折叠电脑等电子设备)需要满足较高的可靠性，较好的操作体验及外观设计。可折叠的移动终端中柔性屏是连续可折叠的，柔性屏跟随外壳同步运动至折叠的过程中，在弯折部分具有很大的变形量。而且柔性屏的两个部分大致平行，使得其弯折部分具有较大的曲率，从而导致柔性屏会有明显的折痕。如果通过两部分外壳的相对平移来减小柔性屏弯折部分的曲率，又会严重影响移动终端的外观。
发明内容
本申请提供了一种转轴机构及电子设备，以实现柔性屏与外壳具有不同转动角度。
本申请实施例的第一方面提供一种转轴机构，用于可折叠的电子设备，所述电子设备包括柔性屏和两个壳体，所述壳体包括外壳和中框，两个所述外壳可转动连接，所述中框与所述外壳转动连接，所述柔性屏铺设于所述中框表面，包括基座、第一驱动部、导向部和第二驱动部。所述第一驱动部包括固定件和两个第一转动臂，所述两个第一转动臂分布在所述基座两侧，所述固定件与所述基座固定，每个所述第一转动臂的一端与所述固定件转动连接，另一端用于与所述中框固定连接，所述第一转动臂包括第一滑动部。所述导向部包括两个导向块，每个所述导向块与所述基座转动连接，每个所述导向块与位于同一侧的一个所述第一转动臂对应，所述导向块包括与所述第一滑动部滑动配合的第二滑动部，所述第一滑动部和所述第二滑动部配合导向所述导向块与所述第一转动臂的相对运动，所述导向块还包括第三滑动部。所述第二驱动部包括两个第二转动臂，所述第二转动臂用于与所述外壳固定连接，所述两个第二转动臂分布在所述基座两侧，每个所述第二转动臂与位于同一侧的一个所述导向块对应，所述第二转动臂包括与所述第三滑动部滑动配合的第四滑动部，所述第三滑动部和所述第四滑动部配合导向所述导向块与所述第二转动臂的相对运动。两个所述第二转动臂从第一相对位置向第二相对位置相对转动时，能够带动两个所述外壳从展开向折叠转换，所述导向部带动两个所述第 一转动臂相对转动，且两个所述第一转动臂的相对转动角度大于两个所述第二转动臂的相对转动角度。两个所述外壳展开时，两个所述中框共面设置，两个所述外壳折叠时，两个所述中框在靠近所述基座的一端呈扩口。
该转轴机构中第一转动臂和第二转动臂通过导向部实现联动，第一转动臂和第二转动臂能够同步转动。但是，第一转动臂和第二转动臂的转动角度不同，具体的，第一转动臂的转动角度大于第二转动臂的转动角度，能够使得第二转动臂带动的外壳转动至折叠时，第二转动臂带动的中框能够具有一定角度，也即中框在靠近基座的一端呈扩口的形状，从而使得中框连接的柔性屏在弯折处实现弧角较大的弧形过渡。能够减少柔性屏的褶皱，缓解柔性屏的折痕光影现象。此处，中框在靠近基座的一端呈扩口的形状，也即，两个中框在靠近基座的一端的相对距离大于两个中框远离基座的一端的相对距离。
基于第一方面，一种可能的实现方式中，所述第一转动臂设置有弧形槽，所述固定件设置有弧形块。所述弧形块与所述弧形槽滑动配合，使得所述第一转动臂与所述固定件绕转动连接。
在该可能的实现方式中，该转轴机构能够通过弧形块和弧形槽的滑动配合，实现第一转动臂与固定件的转动连接。而且弧形块与弧形槽均可以设置为劣弧，从而使得中框能够设置在第一转动臂和固定件相对转动的转轴以下的位置，还能够实现第一转动臂带动中框进行90°以上的大幅度转动。
基于第一方面，一种可能的实现方式中，所述第一滑动部与所述第二滑动部中的一者为第一滑槽，另一者为第一滑块；所述第三滑动部与第四滑动部中的一者为第二滑槽，另一者为第二滑块。
在该可能的实现方式中，该转轴机构的第一滑槽和第二滑槽可以根据第一转动臂和第二转动臂需要的相对运动关系进行设置。在第一滑槽和第二滑槽的形状确定后，第二转动臂转动时，即可通过导向块带动第一转动臂按照预设的轨迹进行运动。而滑块和滑槽的形式，方便第一驱动部、导向部和第二驱动部的组装。
基于第一方面，一种可能的实现方式中，所述第一滑槽包括连续的第一段和第二段，所述第二滑槽包括连续的第三段和第四段。两个所述第二转动臂相对转动使得两个所述第二转动臂相互背离的一端相对靠近时，所述第一滑块从所述第一段进入所述第二段，所述第二滑块从所述第三段进入所述第四段。所述第一滑槽和所述第二滑槽设置为：所述第一滑块在所述第一段滑动时，所述第二滑块在所述第三段滑动，且所述第一转动臂的转动速度等于所述第二转动臂的转动速度。
在该可能的实现方式中，第一滑块在第一段中滑动时，第二滑块同步在第三段中滑动，此时，第一转动臂和第二转动臂的转动速度大致相同。第一转动臂和第二转动臂的转动速度之差在5％以内。这种形式中，第一转动臂带动的中框和第二转动臂带动的外壳，相对运动更加顺滑平稳，使用者不易观察到其相对运动，能够使得展开、折叠过程更加美观。
基于第一方面，一种可能的实现方式中，所述第一滑块在所述第三段滑动时，所述第二滑块在所述第四段滑动，使得两个所述第一转动臂的相对转动速度大于两个所述第二转动臂的相对转动速度。
在该可能的实现方式中，第一转动臂和第二转动臂的相对转动，通过第一滑块在第二段中滑动和第二滑块在第四段中滑动进行控制。第一滑块在第二段中滑动和第二滑块 在第四段中滑动的阶段中，第一转动臂的转动速度始终大于第二转动臂的转动速度，从而实现第一转动臂的总转动角度大于第二转动臂的总转动角度，使得第一转动臂和第二转动臂的相对运动更加顺滑平稳。
基于第一方面，一种可能的实现方式中，所述转轴机构还包括同步组件。所述同步组件与两个所述导向块传动连接，用于实现两个所述导向块同步反向转动。
在该可能的实现方式中，同步组件使得两个导向块同步反向运动，也能够带动两个第一转动臂同步运动，两个第二转动臂同步运动。
基于第一方面，一种可能的实现方式中，所述同步组件包括相啮合的两个同步齿轮。两个所述同步齿轮与两个所述导向块一一对应，且所述同步齿轮与对应的所述导向块固定连接。
在该可能的实现方式中，通过两个同步齿轮的啮合实现两个导向块的同步运动，使得两个导向块的同步传动更加稳定，两个同步齿轮不易出现打滑的现象，从而使得两个导向块的同步运动不易失效。
基于第一方面，一种可能的实现方式中，所述同步组件还包括偶数个联动齿轮，两个所述同步齿轮通过所述偶数个联动齿轮啮合。
在该可能的实现方式中，通过增加偶数个联动齿轮，可以使得同步齿轮和联动齿轮的分度圆设计地较小，不占用空间位置。
基于第一方面，一种可能的实现方式中，所述转轴机构还包括阻尼组件。所述阻尼组件与所述导向块传动连接，用于当两个所述导向块相对转动时，提供阻尼力。
在该可能的实现方式中，阻尼组件提供的阻尼力可以使得两个第二转动臂稳定在第一相对位置和/或第二相对位置。
基于第一方面，一种可能的实现方式中，所述阻尼组件包括第一凸轮件、第二凸轮件和阻尼弹性件。所述第一凸轮件朝向所述第二凸轮件的一面设置有第一凸起，所述第二凸轮设置有与所述第一凸起配合的第一凹槽。所述第一凸轮件和所述第二凸轮件中的一者与所述基座周向限位连接，另一者与所述导向块传动配合，能够与所述导向块同步转动。所述阻尼弹性件用于所述第一凸轮件和所述第二凸轮件相对靠近的弹性力。两个所述第二转动臂从第一相对位置向第二相对位置相对转动的过程中，所述第一凸起从所述第一凹槽滑出。
在该可能的实现方式中，阻尼组件通过第一凸起和第一凹槽配合的形式，使得两个第二转动臂位于第一相对位置时，两个第二转动臂能够相对稳定地处于第一相对位置，与此同时，两个第一转动臂也能够具有相对稳定的相对位置。需要对两个第二转动臂施加一定的扭矩，才能克服阻尼弹性件的弹性力，让第一凸起从第一凹槽中滑出。也即，需要施加一定的扭矩才能使得两个第二转动臂脱离第一相对位置，向第二相对位置移动。
基于第一方面，一种可能的实现方式中，所述第一凸轮件朝向所述第二凸轮件的一面设置有第二凸起，所述第二凸轮设置有与所述第二凸起配合的第二凹槽。两个所述第二转动臂从第二相对位置向第一相对位置相对转动的过程中，所述第二凸起从所述第二凹槽滑出。
在该可能的实现方式中，阻尼组件通过第二凸起和第二凹槽配合的形式，使得两个第二转动臂位于第二相对位置时，两个第二转动臂能够相对稳定地处于第二相对位置，与此同时，两个第一转动臂也能够具有相对稳定的相对位置。需要对两个第二转动臂施 加一定的扭矩，才能克服阻尼弹性件的弹性力，让第二凸起从第二凹槽中滑出。也即，需要施加一定的扭矩才能使得两个第二转动臂脱离第二相对位置，向第一相对位置移动。
基于第一方面，一种可能的实现方式中，所述转轴机构还包括两个屏幕弹性件，所述屏幕弹性件一端连接所述导向块，另一端用于连接所述中框，所述屏幕弹性件使得所述中框具有远离所述导向块的趋势。
在该可能的实现方式中，屏幕弹性件使得两个中框具有相对远离的趋势，从而张紧中框上的柔性屏，使得柔性屏保持平整的状态。这样可以方便柔性屏的安装，以及维持外壳展开时柔性屏的平整。
本申请实施例的第二方面提供一种电子设备，包括柔性屏、第一方面中任一实现方式提供的转轴机构和两个壳体。所述壳体包括外壳和中框，两个所述外壳可转动连接，所述中框与所述外壳转动连接。所述柔性屏的一部分与一个所述中框连接，另一部分与另一个所述中框连接。所述转轴机构中的一个所述第一转动臂与一个所述中框固定连接，另一个所述第一转动臂与另一个所述中框固定连接。所述转轴机构中的一个所述第二转动臂与一个所述外壳固定连接，另一个所述第二转动臂与另一个所述外壳固定连接。
该电子设备中两个壳体通过转轴机构控制转动，使得外壳和中框具有不同的转动角度。中框连接柔性屏，当两个外壳转动至折叠时，也即两个外壳呈180°夹角时，由于中框的转动角度大于外壳的转动角度，使得中框内的柔性屏在弯折处具有大于180°的夹角，而中框与外壳之间转动一定角度来匹配外壳与中框的角度差，从而使得柔性屏在弯折处能够实现顺滑的过渡，减少柔性屏的褶皱，缓解柔性屏的折痕光影现象。
基于第二方面，一种可能的实现方式中，所述壳体还包括转动轴。所述转动轴可转动地设置在所述外壳远离所述转轴机构的一端，所述中框与所述转动轴可转动地配合。
在该可能的实现方式中，通过单独的转动轴实现外壳和中框的相对转动，从而便于外壳和中框组装。
附图说明
图1是一种可折叠的移动终端的结构示意图，两个壳体处于折叠状态。
图2是本申请一实施例提供的电子设备的分解图。其中，两个壳体处于展开状态，柔性屏处于展开状态，转轴机构对应于柔性屏的展开状态，也即两个第二转动臂处于第一相对位置。
图3是本申请一实施例提供的电子设备的分解图。其中，两个壳体处于展开状态，柔性屏处于折叠状态，转轴机构对应于柔性屏的折叠状态，也即两个第二转动臂处于第二相对位置。
图4是本申请一实施例提供的转轴机构的分解图。
图5是本申请一实施例提供的第一驱动部的结构示意图，两个第一转动臂呈展开状态。
图6是本申请一实施例提供的第一驱动部的结构示意图，两个第一转动臂呈折叠状态。
图7是本申请一实施例提供的第一转动臂的结构示意图。
图8是图4中A区域的局部放大图。
图9是图4中B区域的局部放大图。
主要元件符号说明
移动终端，电子设备           001
柔性屏                       010
转轴机构                     030
壳体                         050
第一壳体                     050a
第二壳体                     050b
外壳                         051
第一外壳                     051a
第二外壳                     051b
中框                         053
第一中框                     053a
第二中框                     053b
转动轴                       055
基座                         100
第一安装座                   110
第二安装座                   130
第一驱动部                   200
固定件                       210
弧形槽                       231
第一转动臂                   230
弧形块                       211
第一滑槽                     233
第一段                       2331
第二段                       2333
第一螺栓                     250
第二螺栓                     270
导向部                       300
导向块                       310
第一滑块                     311
第二滑块                     313
第二驱动部                   400
第二转动臂                   410
第二滑槽                     411
第三段                       4111
第四段                       4113
门板                         500
同步齿轮                      610
联动齿轮                      630
第一凸轮件                    710
第一凸起                      711
第二凸起                      713
第二凸轮件                    730
第一凹槽                      731
第二凹槽                      733
阻尼弹性件                    750
屏幕弹性件                    800
如下具体实施方式将结合上述附图进一步说明本申请。
具体实施方式
以下由特定的具体实施例说明本申请的实施方式，本领域技术人员可由本说明书所揭示的内容轻易地了解本申请的其他优点及功效。虽然本申请的描述将结合较佳实施例一起介绍，但这并不代表此申请的特征仅限于该实施方式。恰恰相反，结合实施方式作申请介绍的目的是为了覆盖基于本申请的权利要求而有可能延伸出的其它选择或改造。为了提供对本申请的深度了解，以下描述中将包含许多具体的细节。本申请也可以不使用这些细节实施。此外，为了避免混乱或模糊本申请的重点，有些具体细节将在描述中被省略。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
以下，如果有用到，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”等的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。“上”、“下”、“左”、“右”等方位术语是相对于附图中的部件示意置放的方位来定义的，应当理解到，这些方向性术语是相对的概念，它们用于相对于的描述和澄清，其可以根据附图中部件所放置的方位的变化而相应地发生变化。
在本申请中，如果有用到，除非另有明确的规定和限定，术语“连接”应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或成一体；可以是直接相连，也可以通过中间媒介间接相连。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
在下述实施例结合示意图进行详细描述时，为便于说明，表示器件局部结构的图会不依一般比例作局部放大，而且所述示意图只是示例，其在此不应限制本申请保护的范围。
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请的实施方式作进一步地详细描述。
为了便于理解本申请实施例提供的转轴机构，下面首先介绍一下应用场景。
图1示出了一种可折叠的移动终端的结构示意图，两个壳体050处于折叠状态。
如图1所示，本申请实施例提供的转轴机构030能够应用在可折叠的移动终端001中，可折叠具体来说是包括相对转动的两个部分，通过该两个部分的折叠、旋转等方式改变其自身形态。在不同使用需求条件下，用户可以对这种移动终端001进行折叠、展开来满足用户的不同需求。当用户需要随身携带移动终端001时，可以对其进行折叠，以降低其体积，从而提升便携性。当用户在使用移动终端001时，可以将其展开，以提供更大的显示区域和操作区域，从而提升使用便利性。在实际应用中，移动终端001的类型可以分为多种，例如其具体可以为手机、平板电脑、笔记本电脑、电子书等。
以手机为例，手机中可以包括通过转轴机构030连接的两个壳体050，在转轴机构030的作用下，两个壳体050之间能够产生相对转动、移动等动作。壳体050包括外壳和中框，中框设置在外壳的内侧，柔性屏(如OLED屏幕)可以设置在两个中框的表面，当手机被展开时，两个壳体050设置柔性屏的表面大致齐平，柔性屏平铺在两个壳体050的表面，提供较大的显示面积和操作区域，以提升使用性能。当手机被折叠后，柔性屏也被弯折，柔性屏可以被包裹在转轴机构030和两个壳体050之间，以对柔性屏提供良好的保护作用，防止外力作用下使柔性屏受到损坏，以提升手机的安全性能。
若柔性屏与外壳同步运动，两个外壳从展开到折叠相对运动180°时，柔性屏的两个部分也相对运动180°，会导致柔性屏弯折的位置平行，在弯折的部分出现半径非常小的弧形过渡，导致柔性屏局部应力较大，而反复弯折下会形成明显的折痕。
图2示出了本申请一种实施方式中的电子设备的分解图。其中，两个壳体050处于展开状态，柔性屏010处于展开状态，转轴机构030对应于柔性屏010的展开状态，也即两个第二转动臂410处于第一相对位置。
图3示出了本申请一种实施方式中的电子设备的分解图。其中，两个壳体050处于展开状态，柔性屏010处于折叠状态，转轴机构030对应于柔性屏010的折叠状态，也即两个第二转动臂410处于第二相对位置。
如图2和图3所示，这种电子设备为一种手机。这种电子设备包括柔性屏010、转轴机构030和两个壳体050。
两个壳体050对称设置在转轴机构030的两侧，通过转轴机构030带动两个壳体050相对转动。
每个壳体050包括外壳051和中框053(图中透明化处理)，外壳051具有容置腔，中框053设置于容置腔的开口处。壳体050还包括转动轴055，外壳051远离转轴机构030的一端设置有导向槽，转动轴055通过导向槽与外壳051可转动地配合，中框053与转动轴055可转动地连接。通过转动轴055使得外壳051与中框053可转动地配合。随着中框053与外壳051的相对转动，中框053靠近转轴机构030的一侧能够下沉至容置腔内。
为了便于描述，将两个壳体050分别命名为第一壳体050a和第二壳体050b。对应的，第一壳体050a的外壳051为第一外壳051a，第一壳体050a的中框053为第一中框053a。第二壳体050b的外壳051为第二外壳051b，第二壳体050b的中框053为第二中框053b。柔性屏010固定在中框053远离容置腔的一面，具体的，柔性屏010的一部分与第一中框053a固定，另一部分与第二中框053b固定。通过第一壳体050a和第二壳体050b的相对转动，柔性屏010可以在展开状态和弯折状态之间转换。导向槽还从靠近转轴机构030到远离转轴机构030具有一定延伸量，转动轴055能够在导向槽内滑动，使 得中框053还能够靠近或远离转轴机构030。通过中框053能够相对靠近或远离转轴机构030的特性，可以方便柔性屏010的安装，使得柔性屏010能够平整地展开。
图4示出了本申请一种实施方式中的转轴机构030的分解图。
如图4所示，转轴机构030包括基座100、第一驱动部200、导向部300和第二驱动部400。基座100大致呈长条形，基座100具有安装腔，第一驱动部200、导向部300和第二驱动部400均至少部分容置于安装腔内。
请结合参阅图3和图4，第一外壳051a具有第一背板，第二外壳051b具有第二背板，第一背板、第二背板和基座100共同形成电子设备中背离柔性屏010的一面。当第一壳体050a和第二壳体050b展开时，第一背板、基座100和第二背板连续，从而使得电子设备具有较佳的外观，同时也能够使得电子设备具有较好的防尘性能。
图5示出了本申请一种实施方式中的第一驱动部200的结构示意图，两个第一转动臂230呈展开状态。
图6示出了本申请一种实施方式中的第一驱动部200的结构示意图，两个第一转动臂230呈折叠状态。
如图5和图6所示，第一驱动部200包括固定件210和两个第一转动臂230。固定件210通过第一螺栓250与基座100固定连接。固定件210设置两个弧形块211，两个弧形块211对称地位于固定件210的两侧。第一转动臂230设置有弧形槽231，弧形块211可滑动地设置于弧形槽231内，通过弧形块211在弧形槽231内滑动，使得第一转动臂230能够相对固定件210转动。弧形槽231和弧形块211的形式，使得第一转动臂230绕固定件210转动的转轴位于固定件210外。
请返回参阅图3和图4，第一转动臂230远离固定件210的一端通过第二螺栓270与中框053固定连接。当第一转动臂230相对固定件210转动时，带动中框053一同相对固定件210转动。
第一转动臂230包括第一滑动部，第一滑动部靠近导向部300设置，用于驱动导向部300运动。
请参阅图4，导向部300包括第一安装座110和两个导向块310，第一安装座110与基座100固定连接，导向块310与第一安装座110可转动地配合，使得导向块310与基座100转动连接。每个导向块310与一个第一转动臂230对应。导向块310包括第二滑动部，第二滑动部与第一滑动部滑动配合。当第一转动臂230相对固定件210转动时，第一滑动部与第二滑动部的滑动配合使得导向块310相对基座100转动。
第一滑动部为第一滑槽233，第二滑动部为第一滑块311。第一滑槽233从靠近固定件210向远离固定件210的方向延伸，第一滑块311为圆柱滑块，第一滑块311不仅可以沿第一滑槽233的延伸方向滑动，还可以在第一滑槽233内转动。当第一转动臂230相对固定件210转动时，第一滑块311在第一滑槽233内滑动以驱动导向部300相对基座100转动。
导向块310还包括第三滑动部，第三滑动部位于导向块310远离第一转动臂230的一侧，用于驱动第二驱动部400运动。
第二驱动部400包括两个第二转动臂410。每个第二转动臂410与一个导向块310对应。第二转动臂410包括第四滑动部，第四滑动部与第三滑动部滑动配合。当导向块310相对基座100转动时，第三滑动部与第四滑动部的滑动配合使得第二转动臂410相 对基座100转动。
第三滑动部为第二滑块313，第四滑动部为第二滑槽411。第一滑槽233从靠近基座100向远离基座100的方向延伸，第二滑块313为圆柱滑块，第二滑块313不仅可以沿第二滑槽411的延伸方向滑动，还可以在第二滑槽411内转动。当导向块310相对基座100转动时，第二滑块313在第二滑槽411内滑动以驱动第二转动臂410相对基座100转动。
图7示出了本申请一种实施方式中的第一转动臂230的结构示意图。
请参阅图4和图7，第一滑槽233和第二滑槽411的形状设计可以控制第一转动臂230和第二转动臂410的相对转动速度。具体的，第一滑槽233包括连续的第一段2331和第二段2333，第二滑槽411包括连续的第三段4111和第四段4113。第三段4111和第四段4113延伸方向相同，也即整个第二滑槽411沿同一直线方向延伸，通过设置第一滑槽233中第一段2331和第二段2333的角度来控制第一转动臂230和第二转动臂410的相对运动速度。这样可以降低设计难度，而且使得第二转动臂410的运动更加顺滑。
当第一壳体050a和第二壳体050b展开时，两个第二转动臂410处于第一相对位置。当第一壳体050a和第二壳体050b折叠时，两个第二转动臂410处于第二相对位置。两个第一转动臂230相对转动使得两个第二转动臂410从第一相对位置到第二相对位置转换的过程中，第一滑块311从第一段2331远离第二段2333的一端向第二段2333远离第一段2331的一端运动，第二滑块313从第三段4111远离第四段4113的一端向第四段4113远离第三段4111的一端运动。
当第一滑块311在第一段2331中运动时，第二滑块313在第三段4111中运动，此时，第一转动臂230的转动速度大致等于第二转动臂410的转动速度。具体的，第一转动臂230的转动速度与第二转动臂410的转动速度之差不大于5％，使得第一转动臂230带动的中框053与第二转动臂410带动的外壳051具有大致相同的转动速度。因此，当第一滑块311在第一段2331中运动，第二滑块313在第三段4111中运动时，可以保持第一中框053a与第一背板的平行，第二中框053b与第二背板的平行。此时，使用者的视角效果为：固定在中框053表面的柔性屏010与外壳051同步运动，整个电子设备的折叠过程显得十分顺畅。
当第一滑块311进入第二段2333时，第二滑块313进入第四段4113。当第一滑块311在第二段2333中运动，第二滑块313在第四段4113中运动时，第一转动臂230的转动速度大于第二转动臂410的转动速度。从而使得第一转动臂230转动一定角度时，第二转动臂410会转动一个更小的角度。也即，第二转动臂410转动一定角度时，第一转动臂230会转动一个更大的角度。
当第二转动臂410带动外壳051转动至折叠时，第一外壳051a和第二外壳051b接触并收容柔性屏010，此时第二转动臂410从第一相对位置运动至第二相对位置转动角度大致为90°。也即，一个第二转动臂410带动第一外壳051a转动大致90°，另一个第二转动臂410带动第二外壳051b转动大致90°，第一外壳051a和第二外壳051b从展开状态转换为折叠状态。由于第一转动臂230和第二转动臂410存在转动速度差，并且中框053与外壳051可转动地配合，因此，第二转动臂410带动中框053转动的角度大于90°，使得第一中框053a和第二中框053b从远离基座100到靠近基座100的方向上呈现张开的状态。而柔性屏010弯折的位置，也即柔性屏010靠近基座100的位置能 够存在半径较大的弯折角，从而降低柔性屏010局部的曲率，能够减少柔性屏010的褶皱，缓解柔性屏010的折痕光影现象。
而且由于第一转动臂230与固定件210之间通过弧形槽231和弧形块211的形式实现转动连接，使得柔性屏010可以进一步靠近基座100。相对于第一转动臂230和固定件210之间通过实体转轴进行转动连接的形式，弧形槽231和弧形块211的形式可以避免柔性屏010与实体转轴出现位置冲突的问题。
可以理解的，第一滑动部和第二滑动部也可以设置为：第一滑动部为第一滑块311，第二滑动部为第一滑槽233，同样可以控制第一转动臂230和导向块310的相对运动。
可以理解的，第三滑动部和第四滑动部也可以设置为：第三滑动部为第二滑槽411，第四滑动部为第二滑槽411，同样可以控制第二转动臂410和导向块310的相对运动。
这种电子设备的驱动顺序也可以理解为相反的顺序。即，第二转动臂410通过第三滑动部和第四滑动部的配合带动导向块310的运动，导向块310再通过第一滑动部和第二滑动部的配合带动第一转动臂230的运动。
电子设备中设置有两组第一驱动部200、两组导向部300和两组第二驱动部400，对应于基座100的两端。通过两组第一驱动部200、两组导向部300和两组第二驱动部400使得外壳051和中框053的受力更加均衡。其中，两组第二驱动部400第二转动臂410通过门板500固定连接。也即两组第二驱动部400靠近第一壳体050a的第二转动臂410通过一个门板500固定连接，两组第二驱动部400靠近第二壳体050b的第二转动臂410通过另一个门板500固定连接，增加两组第二驱动部400的整体性，同时也可以增加第二转动臂410的强度。
请参阅图4，转轴机构030还包括同步组件。同步组件包括两个同步齿轮610和两个联动齿轮630。同步齿轮610与导向块310一体成型，同步齿轮610的轴心与导向块310的转轴同轴，也即导向块310绕同步齿轮610的轴心转动。为了便于描述，靠近第一壳体050a的同步齿轮610命名为第一同步齿轮610，靠近第二壳体050b的同步齿轮610命名为第二同步齿轮610。靠近第一壳体050a的联动齿轮630命名为第一联动齿轮630，靠近第二壳体050b的联动齿轮630命名为第二联动齿轮630。
两个联动齿轮630位于两个同步齿轮610之间，第一同步齿轮610与第一联动齿轮630啮合，第一联动齿轮630与第二联动齿轮630啮合，第二联动齿轮630与第二同步齿轮610啮合。固定件210设置有两个插孔，联动齿轮630通过固定件210上的插孔与固定件210可转动配合。第一安装座110也设置有与联动齿轮630对应的插孔，联动齿轮630通过第一安装座110上的插孔与第一安装座110可转动配合。并且通过固定件210与联动齿轮630能够固定第一安装座110与基座100的相对位置。第一安装座110上还设置有与同步齿轮610对应的插孔，同步齿轮610通过第一安装座110上的插孔与第一安装座110可转动配合，也即实现同步齿轮610与基座100的可转动配合。
当第一同步齿轮610转动时，第一联动齿轮630转动，第一联动齿轮630带动第二联动齿轮630转动，第二联动齿轮630带动第二同步齿轮610转动。由于第一同步齿轮610和第二同步齿轮610之间为偶数个联动齿轮630，使得第一同步齿轮610和第二同步齿轮610的转动方向正好相反。因此，当转动一个导向块310时，另一个导向块310可以同步反向转动。
同步组件使得两个导向块310同步反向转动，与之对应的，两个第一转动臂230也 同步反向转动，两个第二转动臂410也同步反向转动，第一外壳051a和第二外壳051b同步反向转动，第一中框053a和第二中框053b同步反向转动。
通过设置两个同步齿轮610和两个联动齿轮630，可以使得每个齿轮的分度圆直径设计地较小，合理利用基座100的安装腔空间。
可以理解的，联动齿轮630的个数还可以为四个、六个或其他偶数个，使得两个同步齿轮610能够同步反向转动。
图8示出了图4中A区域的局部放大图。
图9示出了图4中B区域的局部放大图。
请参阅图4，转轴机构030还包括阻尼组件，阻尼组件与导向块310连接，用于当两个导向块310相对转动时，提供阻尼力。具体的，阻尼组件包括第一凸轮件710、第二凸轮件730和阻尼弹性件750。请参阅图8，第一凸轮件710朝向第二凸轮件730的一面设置有第一凸起711和第二凸起713。请参阅图9，第二凸轮设置有第一凹槽731和第二凹槽733，第一凹槽731与第一凸起711配合，第二凹槽733与第二凸起713配合。
请返回参阅图4，第一凸轮件710与导向块310传动配合，当导向块310转动时，第一凸轮件710同步转动。第二凸轮件730与第一安装座110周向限位配合，第二凸轮件730能够相对靠近或远离第一凸轮件710。阻尼弹性件750为压簧，阻尼弹性件750一端作用于第二凸轮件730，另一端作用于第二安装座130，第二安装座130与基座100固定连接。阻尼弹性件750的弹性力作用于第二凸轮件730，使得第二凸轮件730具有靠近第一凸轮件710的趋势。
具体的，相邻的第二凸轮件730固定连接，每个第二凸轮件730对应一个联动齿轮630或同步齿轮610，因此任意两个第二凸轮件730的转轴平行但不同轴，在所有第二凸轮件730均固定连接后，任意一个第二凸轮件730均无法绕自身轴线转动，但可以沿其轴线滑移。
当两个第二转动臂410位于第一相对位置时，第一凸起711在第一凹槽731内。当两个第二转动臂410从第一相对位置向第二相对位置相对转动的过程中，第一凸起711从第一凹槽731滑出，而阻尼弹性件750提供的弹性力转化为阻止第一凸起711从第一凹槽731滑出的阻尼力，可以提升用户在折叠电子设备时的使用感受。
当两个第二转动臂410位于第二相对位置时，第二凸起713在第二凹槽733内。当两个第二转动臂410从第二相对位置向第一相对位置相对转动的过程中，第二凸起713从第二凹槽733滑出，而阻尼弹性件750提供的弹性力转化为阻止第二凸起713从第二凹槽733滑出的阻尼力，可以提升用户在展开电子设备时的使用感受。
电子设备还包括两个屏幕弹性件800，屏幕弹性件800为压簧。屏幕弹性件800一端连接导向块310，另一端连接中框053，屏幕弹性件800使得中框053具有远离导向块310的趋势。在导向槽的作用下，中框053能够相对外壳051运动，在一定程度上相对靠近或远离导向块310。
通过中框053安装柔性屏010时，可以在中框053相对靠近导向块310的位置上固定柔性屏010，然后再通过屏幕弹性件800的弹性使得中框053远离导向块310，在这个过程中让柔性屏010展开，减少柔性屏010的褶皱。
可以理解的，转动轴055也可以不通过导向槽的形式实现相对外壳051的滑动。可以在外壳051上设置滑动块，滑动块能在外壳051上滑动以靠近或远离转轴机构030。 而转动轴055与滑动块转动配合，从而实现转动轴055与外壳051的相对位移。
这种电子设备中两个壳体050通过转轴机构030控制转动，使得外壳051和中框053具有不同的转动角度。中框053连接柔性屏010，当两个外壳051转动至折叠时，也即两个外壳051呈180°夹角时，由于中框053的转动角度大于外壳051的转动角度，使得中框053内的柔性屏010在弯折处具有大于180°的夹角，而中框053与外壳051之间转动一定角度来匹配外壳051与中框053的角度差，从而使得柔性屏010在弯折处能够实现顺滑的过渡，减少柔性屏010的褶皱，缓解柔性屏010的折痕光影现象。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的公开范围之内。

Claims (13)

  1. 一种转轴机构，用于可折叠的电子设备，所述电子设备包括柔性屏和两个壳体，所述壳体包括外壳和中框，两个所述外壳可转动连接，所述中框与所述外壳转动连接，所述柔性屏铺设于所述中框表面，其特征在于，包括：
    基座；
    第一驱动部，包括固定件和两个第一转动臂，所述两个第一转动臂分布在所述基座两侧，所述固定件与所述基座固定，每个所述第一转动臂的一端与所述固定件转动连接，另一端用于与所述中框固定连接，所述第一转动臂包括第一滑动部；
    导向部，包括两个导向块，所述两个导向块分布在所述基座两侧，每个所述导向块与所述基座转动连接，每个所述导向块与位于同一侧的一个所述第一转动臂对应，所述导向块包括与所述第一滑动部滑动配合的第二滑动部，所述第一滑动部和所述第二滑动部配合导向所述导向块与所述第一转动臂的相对运动，所述导向块还包括第三滑动部；
    第二驱动部，包括两个第二转动臂，所述第二转动臂用于与所述外壳固定连接，所述两个第二转动臂分布在所述基座两侧，每个所述第二转动臂与位于同一侧的一个所述导向块对应，所述第二转动臂包括与所述第三滑动部滑动配合的第四滑动部，所述第三滑动部和所述第四滑动部配合导向所述导向块与所述第二转动臂的相对运动；
    两个所述第二转动臂从第一相对位置向第二相对位置相对转动时，能够带动两个所述外壳从展开向折叠转换，所述导向部带动两个所述第一转动臂相对转动，且两个所述第一转动臂的相对转动角度大于两个所述第二转动臂的相对转动角度；
    两个所述外壳展开时，两个所述中框共面设置，两个所述外壳折叠时，两个所述中框在靠近所述基座的一端呈扩口。
  2. 如权利要求1所述的转轴机构，其特征在于，所述第一转动臂设置有弧形槽，所述固定件设置有弧形块；
    所述弧形块与所述弧形槽滑动配合，使得所述第一转动臂与所述固定件绕转动连接。
  3. 如权利要求1所述的转轴机构，其特征在于，所述第一滑动部与所述第二滑动部中的一者为第一滑槽，另一者为第一滑块；所述第三滑动部与第四滑动部中的一者为第二滑槽，另一者为第二滑块。
  4. 如权利要求3所述的转轴机构，其特征在于，所述第一滑槽包括连续的第一段和第二段，所述第二滑槽包括连续的第三段和第四段；
    两个所述第二转动臂相对转动使得两个所述第二转动臂相互背离的一端相对靠近时，所述第一滑块从所述第一段进入所述第二段，所述第二滑块从所述第三段进入所述第四段；
    所述第一滑槽和所述第二滑槽设置为：
    所述第一滑块在所述第一段滑动时，所述第二滑块在所述第三段滑动，且所述第一转动臂的转动速度等于所述第二转动臂的转动速度。
  5. 如权利要求4所述的转轴机构，其特征在于，所述第一滑块在所述第三段滑动时，所述第二滑块在所述第四段滑动，使得两个所述第一转动臂的相对转动速度大于两个所 述第二转动臂的相对转动速度。
  6. 如权利要求1所述的转轴机构，其特征在于，还包括同步组件；
    所述同步组件与两个所述导向块传动连接，用于实现两个所述导向块同步反向转动。
  7. 如权利要求6所述的转轴机构，其特征在于，所述同步组件包括相啮合的两个同步齿轮；
    两个所述同步齿轮与两个所述导向块一一对应，且所述同步齿轮与对应的所述导向块固定连接。
  8. 如权利要求7所述的转轴机构，其特征在于，所述同步组件还包括偶数个联动齿轮，两个所述同步齿轮通过所述偶数个联动齿轮啮合。
  9. 如权利要求1所述的转轴机构，其特征在于，还包括阻尼组件；
    所述阻尼组件与所述导向块传动连接，用于当两个所述导向块相对转动时，提供阻尼力。
  10. 如权利要求9所述的转轴机构，其特征在于，所述阻尼组件包括第一凸轮件、第二凸轮件和阻尼弹性件；
    所述第一凸轮件朝向所述第二凸轮件的一面设置有第一凸起，所述第二凸轮设置有与所述第一凸起配合的第一凹槽；
    所述第一凸轮件和所述第二凸轮件中的一者与所述基座周向限位连接，另一者与所述导向块传动配合，能够与所述导向块同步转动；
    所述阻尼弹性件用于提供所述第一凸轮件和所述第二凸轮件相对靠近的弹性力；
    两个所述第二转动臂从第一相对位置向第二相对位置相对转动的过程中，所述第一凸起从所述第一凹槽滑出。
  11. 如权利要求1所述的转轴机构，其特征在于，还包括所述转轴机构还包括两个屏幕弹性件，所述屏幕弹性件一端连接所述导向块，另一端用于连接所述中框，所述屏幕弹性件使得所述中框具有远离所述导向块的趋势。
  12. 一种电子设备，其特征在于，包括柔性屏和两个壳体，还包括如权利要求1至11任一项所述的转轴机构；
    所述壳体包括外壳和中框，两个所述外壳可转动连接，所述中框与所述外壳转动连接；
    所述柔性屏的一部分与一个所述中框连接，另一部分与另一个所述中框连接；
    所述转轴机构中的一个所述第一转动臂与一个所述中框固定连接，另一个所述第一转动臂与另一个所述中框固定连接；
    所述转轴机构中的一个所述第二转动臂与一个所述外壳固定连接，另一个所述第二转动臂与另一个所述外壳固定连接。
  13. 如权利要求12所述的电子设备，其特征在于，所述壳体还包括转动轴；
    所述转动轴可转动地设置在所述外壳远离所述转轴机构的一端，所述中框与所述转动轴可转动地配合。
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