WO2022134075A1 - 弯折装置及显示装置 - Google Patents

弯折装置及显示装置 Download PDF

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Publication number
WO2022134075A1
WO2022134075A1 PCT/CN2020/139631 CN2020139631W WO2022134075A1 WO 2022134075 A1 WO2022134075 A1 WO 2022134075A1 CN 2020139631 W CN2020139631 W CN 2020139631W WO 2022134075 A1 WO2022134075 A1 WO 2022134075A1
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WO
WIPO (PCT)
Prior art keywords
plate
rotating plate
rotating
bending device
bending
Prior art date
Application number
PCT/CN2020/139631
Other languages
English (en)
French (fr)
Inventor
张守川
祝尚杰
Original Assignee
京东方科技集团股份有限公司
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 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/614,355 priority Critical patent/US11778764B2/en
Priority to PCT/CN2020/139631 priority patent/WO2022134075A1/zh
Priority to CN202080003683.XA priority patent/CN115176214A/zh
Publication of WO2022134075A1 publication Critical patent/WO2022134075A1/zh

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Classifications

    • 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
    • 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
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • 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
    • G06F1/1616—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 folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • 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
    • 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
    • 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 disclosure relates to the field of display technology, and in particular, to a bending mechanism and a display device.
  • bendable flexible display panels are becoming more and more extensive. During use, users can bend them into a bent state or unfold them into a flat state, thereby realizing shape transformation and adapting to different usage scenarios.
  • a bending device is usually installed for the flexible display panel, but during the bending process, problems such as wrinkling and damage are likely to occur in the bending area.
  • the purpose of the present disclosure is to provide a bending mechanism and a display device.
  • a bending device for a flexible display panel comprising:
  • a support plate having opposite first and second sides
  • a lift plate which is arranged on the side of the first surface away from the second surface, and has a gap with the first surface
  • the rotating plate is arranged on the side of the first surface away from the second surface, and is distributed on the side of the lifting plate along the first direction; the rotating plate is rotatably connected with the supporting plate, and can Rotation between the folded position and the unfolded position; in the unfolded position, the rotation plate and the support plate are coplanar; in the folded position, the rotation plate and the support plate are located on different planes; the rotation The board is used for attaching to the flexible display panel, so as to drive the flexible display panel to unfold or bend;
  • a transmission assembly arranged on the support plate and connected with the rotating plate;
  • a first elastic member arranged between the lift plate and the support plate, for applying a force toward the first surface to the lift plate
  • a push wheel is arranged between the lift plate and the support plate, and is connected with the rotating plate through the transmission assembly; the push wheel can be rotated under the driving of the rotating plate;
  • the profile includes at least a distal point and a proximal point, and the distance between the distal point and the proximal point and the axis of rotation of the push wheel is different;
  • the push wheel In the process of rotating the rotating plate from the bending position to the unfolding position, the push wheel can be driven to push the lifting plate to the supporting position in a direction away from the first surface; During the process of rotating from the unfolding position to the bending position, the first elastic member moves the lifting plate to the avoidance position in a direction close to the first surface.
  • the transmission assembly includes:
  • an input gear fixed on the rotating plate, and the axial direction of the input gear is a second direction perpendicular to the first direction;
  • an output gear rotatably connected to the support plate, the rotation axis of the output gear extends along the second direction, and the output gear is coaxially connected to the push wheel;
  • the transmission gear set is meshed between the input gear and the output gear.
  • the transmission gear set includes:
  • the transmission shaft is rotatably connected to the support plate along the second direction, one end is connected with the first transmission gear, and the other end is connected with the second transmission gear.
  • the input gear is a semicircular gear formed on the rotating plate.
  • the support plate is provided with a mounting hole and a mounting groove penetrating in a direction perpendicular to the first surface, and the pushing wheel is at least partially located in the mounting hole, so The second transmission gear and the output gear are at least partially located in the mounting groove.
  • the rotating plate is rotatably connected to the supporting plate through a hinge mechanism, and the hinge mechanism includes:
  • a rotating part fixed on the rotating plate, and distributed along the second direction with the fixed part and the input gear; the central axis of the rotating part and the fixed part along the second direction and the The central axis of the input gear is collinear; the surface of the rotating part close to the fixed part is provided with an arc-shaped chute;
  • a hinge pin one end of which is inserted into the fixing part, and the other end is slidably fitted in the chute;
  • the hinge pin slides along the chute, and when the rotating plate is at the unfolded position, the hinge pin is located at the One end of the chute, when the rotating plate is at the bending position, the hinge pin is located at the other end of the chute.
  • the hinge pin includes a pin body and a pin head located at one end of the pin body, the outer periphery of the pin head protrudes from the outer periphery of the pin body; the pin head may be slidably fitted in the chute, and one end of the pin body away from the pin head is located in the fixing portion;
  • the hinge mechanism also includes:
  • a second elastic member is sleeved on the outside of the pin, with one end abutting on the pin head and the other end abutting on the fixing portion; the second elastic member is compressed along the axial direction of the hinge pin status.
  • the surface of the pin head facing away from the pin body is a spherical surface, and both ends of the bottom surface of the chute have dimples matching the shape of the pin head;
  • the hinge pin When the rotating plate is at the unfolding position, the hinge pin is located in one of the recesses of the sliding groove; when the rotating plate is at the bending position, the hinge pin is located in the sliding groove in the other of said pits.
  • the fixing portion is provided with a blind hole, and a step is provided in the blind hole; both the hinge pin and the second elastic member extend into the blind hole, and The second elastic member is clamped between the step and the pin head.
  • the same rotating plate is connected to the supporting plate through two hinge mechanisms, and the two hinge mechanisms share the same fixed portion, and the two hinge mechanisms
  • the limiting parts of the mechanism are symmetrically distributed on both sides of the fixing part.
  • the rotating plate is provided with a reinforcing rib connected between the rotating parts of the two hinge mechanisms, and the hinge pin is located on one side of the reinforcing rib.
  • the push wheel is a cam or an eccentric wheel.
  • the number of the rotating plates is two, and the two rotating plates are distributed on both sides of the lifting plate along the first direction, and can face or face away from each other. to turn;
  • the number of the pushing wheels is two, and each of the pushing wheels is connected with a rotating plate through a transmission assembly.
  • the two push wheels are distributed along the axial direction of the push wheels.
  • the lifting plate includes a bottom plate and a boss located on a surface of the bottom plate close to the first surface, the first elastic member is connected to the boss and the boss between the first sides.
  • a surface of the lift plate close to the first surface is provided with a positioning column
  • the first elastic member is a spring
  • the first elastic member is sleeved on the out of the positioning column and connected with the positioning column.
  • an edge of the first surface is provided with a support arm extending in a direction away from the first surface, and the support arm is located on one side of the lift plate;
  • the support arm When the rotating plate is at the unfolding position, the support arm abuts on the surface of the rotating plate close to the first surface; when the rotating plate is at the bending position, the rotating plate is at the between the support arm and the lift plate.
  • a display device comprising:
  • the backlight surface is attached to a surface of the rotating plate that is away from the first surface.
  • FIG. 1 is an exploded view of a bending device according to an embodiment of the disclosure.
  • FIG. 2 is an assembly view of the unfolded bending device according to an embodiment of the present disclosure.
  • FIG. 3 is a cross-sectional view of the unfolded bending device according to an embodiment of the disclosure.
  • FIG. 4 is an assembly view of the bending device after bending according to an embodiment of the disclosure.
  • FIG. 5 is a cross-sectional view of a bending device after bending according to an embodiment of the disclosure.
  • FIG. 6 is a partial top view of a bending device according to an embodiment of the disclosure.
  • FIG. 7 is a side view of a bending device according to an embodiment of the disclosure.
  • FIG. 8 is a partial cross-sectional view of part A in FIG. 7 .
  • FIG. 9 is a partial enlarged view of FIG. 8 .
  • FIG. 10 is a schematic diagram of a support plate of a bending device according to an embodiment of the disclosure.
  • FIG. 11 is a schematic diagram of a lifting plate of a bending device according to an embodiment of the disclosure.
  • FIG. 12 is a schematic diagram of a first elastic member of a bending device according to an embodiment of the disclosure.
  • FIG. 13 is a schematic diagram of a rotating plate of a bending device according to an embodiment of the disclosure.
  • FIG. 14 is a schematic diagram of a rotating plate and a rotating part of a bending device according to an embodiment of the disclosure.
  • FIG. 15 is a schematic diagram of a hinge pin and a second elastic member of a bending device according to an embodiment of the disclosure.
  • Supporting plate 11. Supporting arm; 110. First surface; 120. Second surface; 101. Mounting hole; 102. Mounting slot; 2. Lifting plate; 21. Bottom plate; ;3, rotating plate; 4, transmission assembly; 41, input gear; 42, output gear; 43, transmission gear group; 431, transmission shaft; 432, first transmission gear; 433, second transmission gear; 5, first Elastic part; 6, push wheel; 7, hinge mechanism; 71, fixed part; 711, blind hole; 712, step; 72, rotating part; 721, chute; 722, pit; 73, hinge pin; 731, pin body; 732, pin head; 74, second elastic member; 75, reinforcing rib; 8, shaft.
  • Example embodiments will now be described more fully with reference to the accompanying drawings.
  • Example embodiments can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
  • the same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.
  • the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.
  • the bendable flexible display panel has a light-emitting surface and a backlight surface, and its bending methods include inward folding and outward folding.
  • Folding refers to the bending method in which the light-emitting surface is close to fit after bending.
  • the bending device In order to support the flexible display panel during bending, it is usually necessary to install the flexible display panel on a bending device.
  • the bending device generally includes two relatively rotatable flat plates and a connecting plate between the two flat plates. The rotation of the connecting plate can drive the flexible display panel to bend.
  • the flexible display panel For the flexible display panel that adopts the inward folding method, during the bending process, the flexible display panel corresponds to the area of the connecting plate that needs to be deformed to form a bending area to ensure smooth bending, but because the connecting plate is not fixed.
  • the flexible display panel is moved against the flexible display panel, so that normal bending deformation cannot occur in the bending area, and it is easy to wrinkle, resulting in easy damage to the flexible display panel.
  • Embodiments of the present disclosure provide a bending device for a flexible display panel
  • the flexible display panel may be an OLED (Organic Light-Emitting Diode, organic light-emitting diode) display panel
  • the flexible display panel has opposite light-emitting surfaces and backlight.
  • OLED Organic Light-Emitting Diode, organic light-emitting diode
  • the bending device of the present disclosure may include a supporting plate 1, a lifting plate 2, a rotating plate 3, a transmission assembly 4, a first elastic member 5 and a pushing wheel 6, wherein:
  • the support plate 1 has a first surface 110 and a second surface 120 opposite to each other;
  • the lift plate 2 is disposed on the side of the first surface 110 away from the second surface 120 and has a gap between the first surface 110 and the first surface 110 ;
  • the rotating plate 3 is arranged on the side of the first surface 110 away from the second surface 120, and is distributed on one side of the lifting plate 2 along the first direction; Rotate between positions; in the unfolded position, the rotating plate 3 and the supporting plate 1 are coplanar; in the bending position, the rotating plate 3 and the supporting plate 1 are located on different planes; the rotating plate 3 is used to attach to the flexible display panel to drive the flexible display The panel is unfolded or bent;
  • the transmission assembly 4 is arranged on the support plate 1 and is connected with the rotating plate 3;
  • the first elastic member 5 is arranged between the lift plate 2 and the support plate 1, and is used to apply a force toward the first surface 110 to the lift plate 2;
  • a push wheel 6 is arranged between the lift plate 2 and the support plate 1 , and is connected to the rotating plate 3 through the transmission assembly 4 ; the push wheel 6 can be driven by the rotating plate 3 Rotation; the profile of the push wheel 6 includes at least a distal point and a proximal end point, and the distance between the distal end point and the proximal end point and the axis of rotation of the push wheel 6 is different;
  • the push wheel 6 can be driven to push the lifting plate 2 to the supporting position in a direction away from the first surface 110; when the rotating plate 3 is rotated from the unfolding position to the bending position During the process, the first elastic member 5 moves the lift plate 2 to the avoidance position in a direction close to the first surface 110 .
  • the rotating plate 3 can be placed in the unfolded position, that is, the position coplanar with the lifting plate 2 , and the flexible display panel can be attached to the rotating plate. 3.
  • the flexible display panel is in contact with the rotating plate 3 and the lifting plate 2 at the same time, but there is no special connection between the flexible display panel and the lifting plate 2, so as to prevent the normal bending of the flexible display panel from being affected; at this time , the push wheel 6 supports the lift plate 2 on the surface of the lift plate 2 close to the first surface 110 , so that the lift plate 2 is in a supporting position, thereby overcoming the pulling force applied by the first elastic member 5 to the lift plate 2 toward the first surface 110 .
  • the rotating plate 3 can be rotated manually or with the help of other external forces, and the flexible display panel is bent under the driving of the rotating plate 3; at the same time, the push wheel 6 rotates , the lifting plate 2 gradually loses the supporting force of the push wheel 6, so that under the action of the first elastic member 5, it moves to the avoidance position in the direction close to the first surface 110. Since the lifting plate 2 moves to the first surface 110, it is The bending area of the flexible display panel reserves an accommodation space to ensure that the flexible display panel can be bent smoothly, and the lifting plate 2 can always support the flexible display panel during the movement, thereby realizing dynamic support for the bending area.
  • the lifting plate 2 can support the bending area of the flexible display panel to prevent damage to the bending area.
  • the support plate 1 is a flat plate structure, and its shape and size are not particularly limited herein.
  • the support plate 1 has a first surface 110 and a second surface 120 opposite to each other, and the first surface 110 and the second surface 120 may be planes parallel to each other.
  • the lifting plate 2 can be a flat plate structure, and the rotating plate 3 can be attached to the flexible display panel, so as to drive the flexible display panel to unfold or bend through the rotation of the rotating plate 3 .
  • the shape of the lift plate 2 may be rectangular or other shapes.
  • the lift plate 2 is a rectangular flat plate structure, its width in the width direction is smaller than the width of the support plate 1 , and the length of the lift plate 2 in the longitudinal direction is greater than the length of the support plate 1 .
  • the lift plate 2 is disposed on the side of the first surface 110 of the support plate 1 away from the second surface 120 , and the lift plate 2 can be disposed parallel to the first surface 110 with a gap therebetween.
  • the lift plate 2 can reciprocate and translate between the support position and the avoidance position along the direction perpendicular to the first surface 110 , so that the lift plate 2 is always parallel to the first surface 110 during the translation process, and the support position is at the avoidance position away from the first surface 110 side.
  • the first elastic member 5 can be disposed between the lift plate 2 and the support plate 1 to apply a force toward the first surface 110 to the lift plate 2 to make the lift plate 2 Has a tendency to move to an avoidance position.
  • the first elastic member 5 may be a spring, or may be other elastically deformable devices such as rubber bands, so as to apply the above-mentioned force to the lifting plate 2 .
  • the number of the first elastic members 5 may be one or more.
  • the first elastic member 5 is a spring.
  • a positioning post 221 may be provided on the surface of the lift plate 2 close to the first surface 110 , and the first elastic member 5 may be sleeved on the positioning post 221, and connected with the positioning column 221.
  • the height of the positioning post 221 is smaller than the distance between the lift plate 2 and the first surface 110 when the lift plate 2 is in the avoidance position.
  • the lift plate 2 may include a bottom plate 21 and a boss 22 , wherein:
  • the bottom plate 21 is a flat plate structure parallel to the first surface 110;
  • the boss 22 is located on the surface of the bottom plate 21 close to the first surface 110 , and the shape of the boss 22 is not particularly limited herein.
  • the first elastic member 5 can be connected between the boss 22 and the first surface 110.
  • the first elastic member 5 is a spring, and the boss 22 faces away from the surface of the bottom plate 21, that is, the surface of the lifting plate 2 close to the first surface 110,
  • the above-mentioned positioning column 221 can be provided, and the first elastic member 5 can be sleeved outside the positioning column 221 and connected with the positioning column 221 .
  • the rotating plate 3 can be a flat plate structure, and its shape can be a rectangle or other shapes.
  • the rotating plate 3 is disposed on the side of the first surface 110 away from the second surface 120 , that is, the rotating plate 3 and the lifting plate 2 are located on the same side of the supporting plate 1 .
  • the rotating plate 3 can be distributed on one side of the lifting plate 2 along the first direction, and the rotating plate 3 can be rotatably connected with the supporting plate 1 and can rotate between the bending position and the unfolding position.
  • the first direction is shown as the X direction in FIG. 1 .
  • both the rotating plate 3 and the lifting plate 2 are rectangular in shape, and have the same length, and the width of the rotating plate 3 is greater than the width of the lifting plate 2 .
  • the long sides of the rotating plate 3 and the long sides of the lifting plate 2 are arranged in parallel.
  • the rotating plate 3 and the supporting plate 1 are coplanar, that is, the surface of the rotating plate 3 facing away from the first surface 110 and the surface of the supporting plate 1 facing away from the first surface 110 are on the same plane, that is, the rotating plate 3
  • the included angle with the support plate 1 is 180°.
  • the rotating plate 3 and the supporting plate 1 are located on different planes, that is to say, there is a certain angle between the rotating plate 3 and the supporting plate 1, and the angle is greater than 0° and less than 180° .
  • the included angle between the rotating plate 3 and the supporting plate 1 is 90°.
  • the rotation angle of the rotating plate 3 of the present disclosure is not particularly limited, and may be determined according to the maximum bending amplitude that the flexible display panel can bear.
  • the edge of the first surface 110 of the support plate 1 may be provided with a support arm 11 extending away from the first surface 110 , and the support arm 11 is located on the side of the lift plate 2 .
  • the support arm 11 abuts on the surface of the rotating plate 3 close to the first surface 110 , so as to support the rotating plate 3 .
  • the rotating plate 3 is in the bending position, the rotating plate 3 is located between the support arm 11 and the lifting plate 2, so that the rotation of the rotating plate 3 is prevented from being interfered.
  • the push wheel 6 is arranged between the lift plate 2 and the support plate 1 , and is connected to the rotating plate 3 through the transmission assembly 4 arranged on the support plate 1 .
  • the rotation axis of the push wheel 6 is parallel to the rotation axis of the rotating plate 3 , and the push wheel 6 can rotate under the driving of the rotating plate 3 .
  • the contour of the push wheel 6 at least includes a distal point and a proximal end, and the distance between the distal point and the proximal end and the rotation axis of the push wheel 6 is different, so that the reciprocation of the lifting plate 2 can be realized in cooperation with the force of the first elastic member 5 Pan. in particular:
  • the driving wheel 6 can be driven to rotate by the transmission assembly 4 until the distal point abuts the lifting plate 2 (for example: pushing The wheel 6 is in contact with the surface of the boss 22 close to the first surface 110 ), thereby pushing the lifting plate 2 away from the first surface 110 to the support position, where the push wheel 6 pushes the lifting plate 2 away from the first surface 110 .
  • the lift plate 2 can abut against the push wheel 6 when it is in the avoidance position.
  • the surface 110 moves to the avoidance position.
  • the proximal end of the push wheel 6 is in contact with the lift plate 2 , and the first elastic member 5 is still in a stretched state. That is to say, under the action of the pulling force of the first elastic member 5, the lifting plate 2 is always in contact with the push wheel 6, but because the push wheel 6 has a distal point and a proximal point, it can be between the supporting position and the avoidance position. move.
  • the lift plate 2 can be separated from the push wheel 6 when it is in the avoidance position. Specifically: when the lift plate 2 moves from the support position to the first surface 110 to the avoidance position, the first elastic The force exerted by the element 5 on the lifting plate 2 can move the lifting plate 2 to the first surface 110 for a distance, but it is not enough to make the lifting plate 2 contact the proximal point of the push wheel 6, or, between the lifting plate 2 and the push wheel Before the proximal end point of 6 contacts, the first elastic member 5 has returned to a free state (neither stretching nor compression), and the lifting plate 2 stops moving. At this time, the position of the lift plate 2 is the avoidance position.
  • the push wheel 6 may be a cam, the point farthest from the rotation axis in the outline of the pusher wheel 6 is the distal point, and the point closest to the rotation axis is the near point endpoint.
  • the contour of the cam can be involute or other shapes, and its shape is not limited herein.
  • the push wheel 6 can also be an eccentric wheel, and its contour can be a circle, but the center of the circle is located outside the rotation axis, and the point farthest from the rotation axis is the distal point, which is closest to the rotation axis. The point is the near end point.
  • the transmission assembly 4 may include a plurality of gears, and the driving wheel 6 is driven to rotate through the step-by-step transmission of the plurality of gears.
  • the transmission assembly 4 may include Input gear 41, output gear 42 and transmission gear set 43, wherein:
  • the input gear 41 is fixed on the rotating plate 3 and can rotate synchronously with the rotating plate 3.
  • the axial direction of the input gear 41 is a second direction perpendicular to the first direction, and the second direction is shown in the Y direction in FIG. 1 .
  • the input gear 41 can be a semicircular gear fixed on the surface of the rotating plate 3 close to the first surface 110 (when the rotating plate 3 is in the unfolded position), and the semicircular gear can be integrally formed with the rotating plate 3 .
  • the input gear 41 may also be an independent structure fixed on the rotating plate 3 by means of clipping or the like.
  • the output gear 42 is rotatably connected to the support plate 1, and its rotation axis is collinear with the rotation axis of the cam along the second direction, and the output gear 42 is coaxially connected to the push wheel 6, for example: the output gear 42 and the push wheel 6 pass through A rotating shaft 8 extending in the second direction is connected. Therefore, the push wheel 6 can be driven to rotate synchronously through the output gear 42 .
  • the transmission gear set 43 can be engaged between the input gear 41 and the output gear 42 , and when the input gear 41 rotates, it can drive the output gear 42 to rotate.
  • the transmission gear set 43 may include a first transmission gear 432, a second transmission gear 433 and a transmission shaft 431, wherein:
  • the transmission shaft 431 is rotatably connected to the support plate 1 .
  • the first transmission gear 432 is connected to one end of the transmission shaft 431 and meshes with the input gear 41 .
  • the second transmission gear 433 is connected to the other end of the transmission shaft 431 and meshes with the output gear 42 .
  • the rotating plate 3 When the rotating plate 3 drives the input gear 41 to rotate, it can drive the first transmission gear 432 to rotate, the first transmission gear 432 can drive the second transmission gear 433 to rotate synchronously through the transmission shaft 431 , and the second transmission gear 433 can drive the output gear 42 Rotate, so that the push wheel 6 rotates.
  • the structure of the transmission assembly 4 is not limited to the above structure. In other embodiments of the present disclosure, the transmission assembly 4 may also adopt other structures, as long as the rotating plate 3 can drive the push wheel 6 to rotate.
  • installation holes 101 and installation grooves 102 may be opened on the support plate 1.
  • the installation holes Both the 101 and the installation groove 102 penetrate the support plate 1 in a direction perpendicular to the first surface 110 , and the installation groove 102 can also penetrate through the support plate 1 in the first direction.
  • the pushing wheel 6 is at least partially located in the mounting hole 101 , and the lifting plate 2 is directly opposite to the mounting hole 101 , so that the pushing wheel 6 is in contact with the lifting plate 2 .
  • the second transmission gear 433 and the output gear 42 are at least partially located in the installation slot 102 , and the shaft 8 connecting the output gear 42 and the push wheel 6 can pass through the installation slot 102 into the installation hole 101 and rotate with the support plate 1 .
  • the first transmission gear 432 and the input gear 41 may be located outside the support plate 1 .
  • the rotating plate 3 may be rotatably connected to the supporting plate 1 through a hinge mechanism 7 , and the hinge mechanism 7 may include a fixing portion 71.
  • Rotating part 72 and hinge pin 73 wherein:
  • the fixing portion 71 can be fixed to the support plate 1 .
  • the support plate 1 has two sides opposite to each other in the first direction, and the fixing portion 71 can be fixed to the side of the support plate 1 close to the rotating plate 3 .
  • the fixing portion 71 may be an independent component fixed to the support plate 1 by clipping or other connection methods, or may be a protruding structure integrally formed on the support plate 1 .
  • the rotating part 72 is fixed to the surface of the rotating plate 3 close to the first surface 110 (when the rotating plate 3 is in the unfolded position), and is distributed along the second direction with the fixed part 71 and the input gear 41 .
  • the central axis of the rotating portion 72 and the fixed portion 71 in the second direction is collinear with the central axis of the input gear 41 .
  • the surface of the rotating part 72 close to the fixed part 71 is provided with an arc-shaped chute 721 , the center of curvature of the chute 721 is located on the central axis of the rotating part 72 along the second direction, and the curvature of the chute 721 is the same as the curvature of the input gear 41 .
  • the rotating part 72 can be integrally formed and arc-shaped, and of course, other shapes can also be used.
  • one end of the hinge pin 73 penetrates into the fixing portion 71 , and the other end is slidably fitted in the sliding groove 721 .
  • the hinge pin 73 slides along the sliding groove 721, and when the rotating plate 3 is at the unfolding position, the hinge pin 73 is located at one end of the sliding groove 721, and when the rotating plate 3 is at the bending position In the folded position, the hinge pin 73 is located at the other end of the sliding groove 721 ; thus, the rotation range of the rotating plate 3 can be limited by the sliding groove 721 .
  • the hinge pin 73 can be in contact with the inner wall of the chute 721, and the frictional force between the hinge pin 73 and the inner wall of the chute 721 can hinder the free rotation of the rotating plate 3. After the external force that makes the rotating plate 3 rotate disappears, the rotating plate 3 does not rotate. It will move freely, so as to realize the stop function.
  • the hinge pin 73 includes a pin body 731 and a pin located at one end of the pin body 731
  • the head 732 the outer circumference of the pin head 732 protrudes from the outer circumference of the pin body 731 , for example, the pin head 732 is a spherical notch structure, the pin body 731 is a cylindrical structure, and the diameter of the pin body 731 is smaller than that of the pin head 732 .
  • the pin head 732 is slidably fitted in the sliding groove 721 and is in contact with the bottom surface and the side wall of the sliding groove 721 .
  • One end of the pin body 731 away from the pin head 732 is located in the fixing portion 71 .
  • the hinge mechanism 7 also includes a second elastic member 74, which can be sleeved outside the pin body 731, one end abuts on the surface of the pin head 732 close to the pin body 731, and the other end abuts on the fixing portion 71.
  • the fixing A blind hole 711 may be formed in the portion 71 corresponding to the pin body 731.
  • a step 712 is formed in the blind hole 711. Both the hinge pin 73 and the second elastic member 74 extend into the blind hole 711, and the second elastic member 74 is clamped in Between step 712 and pin head 732 .
  • the second elastic member 74 is always in a state of being compressed along the axial direction of the hinge pin 73, thereby increasing the pressure of the pin head 732 on the bottom surface of the chute 721, increasing the frictional force, and further improving the follow-up effect.
  • the surface of the pin head 732 facing away from the pin body 731 is a spherical surface, that is, the pin head 732 may be a spherical surface.
  • the two ends of the bottom surface of the chute 721 are provided with dimples 722 that match the shape of the pin head 732, that is, the inner surface of the dimple 722 is spherical.
  • the pin head 732 When the rotating plate 3 is in the unfolded position, the pin head 732 is located in a recess 722 of the chute 721; To make the pin head 732 slide out of the recess 722, a large external force needs to be applied to the rotating plate 3, so that the rotating plate 3 can be positioned in the unfolded position and the bent position.
  • the same rotating plate 3 can be connected to the support plate 1 through two of the above-mentioned hinge mechanisms 7, and the two hinge mechanisms 7 can be distributed along the second direction. Further, the two hinge mechanisms 7 can share the same fixed portion 71 , and the limiting portions of the two hinge mechanisms 7 can be symmetrically distributed on both sides of the fixed portion 71 , and the central axes of the hinge pins 73 of the two hinge mechanisms 7 are common. Wire.
  • the hinge mechanism 7 reference may be made to the above embodiments, which will not be repeated here.
  • a reinforcing rib 75 can be provided between the rotating parts 72 connected to the two hinge mechanisms 7 on the rotating plate 3 to support the two rotating parts 72, improve the strength of the two, and make them not easily deformed.
  • the hinge pin 73 is located on one side of the reinforcing rib 75 to avoid interference with the reinforcing rib 75 .
  • the number of rotating plates 3 may be two, and the two rotating plates 3 are symmetrically distributed on both sides of the lifting plate 2 along the first direction, and both It is rotatably connected with the support plate 1 so as to be able to rotate toward or away from each other, but is always located on the side of the first surface 110 of the support plate 1 away from the second surface 120 .
  • the two rotating plates 3 can be rotatably connected to the supporting plate 1 through the above-mentioned hinge mechanism 7 .
  • the hinge mechanisms 7 of the two rotating plates 3 are symmetrically arranged with respect to the lifting plate 2 , and their specific structures will not be described in detail here.
  • the number of push wheels 6 is also two, and they are respectively connected with the two rotating plates 3 through the transmission assembly 4 in a one-to-one correspondence, that is, each pusher
  • the wheel 6 is connected to a rotating plate 3 through a transmission assembly 4 .
  • the two transmission assemblies 4 are symmetrically distributed with respect to the central axis of the lift plate 2 along the second direction, and the two push wheels 6 can cooperate with the first elastic member 5 simultaneously or independently to realize the movement of the lift plate 2 .
  • the two push wheels 6 in order to prevent the two push wheels 6 from interfering with each other during rotation, they can be distributed along the second direction perpendicular to the first direction, that is, along the axial direction of the push wheels 6, that is, along the second direction, so as to avoid Collision.
  • the lifting plate 2 When the two rotating plates 3 are in the unfolded position, the lifting plate 2 is in the supporting position, and the rotating plate 3 and the lifting plate 2 are coplanar, so as to support the flexible display panel.
  • the lifting plate 2 When the two rotating plates 3 are both in the bending position, the lifting plate 2 is in the avoidance position, and the rotating plate 3 and the lifting plate 2 form a certain angle, so that the flexible display panel is bent, and the bending area abuts the lifting plate 2 .
  • Embodiments of the present disclosure further provide a display device, the display device may include a flexible display panel and a bending device, wherein:
  • the flexible display panel has opposite light-emitting surfaces and backlight surfaces, which can be bent under the action of external force.
  • the bending device is the bending device of any of the above-mentioned embodiments, and its structure and working principle are described in detail here.

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Abstract

一种弯折机构及显示装置，涉及显示技术领域。弯折机构包括支撑板(1)、升降板(2)、转动板(3)、传动组件(4)、第一弹性件(5)和推动轮(6)。支撑板(1)具有相背的第一面(110)和第二面(120)；升降板(2)设于第一面(110)背离第二面(120)的一侧；转动板(3)设于第一面(110)背离第二面(120)的一侧；转动板(3)能在弯折位置和展开位置间转动；转动板(3)可带动柔性显示面板展开或弯折；第一弹性件(5)设于升降板(2)和支撑板(1)之间；推动轮(6)通过传动组件(4)与转动板(3)连接；推动轮(6)的轮廓包括远端点和近端点。在转动板(3)由弯折位置转动至展开位置时，能使推动轮(6)向背离第一面(110)的方向推动升降板(2)至支撑位置；在转动板(3)由展开位置转动至弯折位置时，第一弹性件(5)使升降板(2)向靠近第一面(110)的方向移动至避让位置。

Description

弯折装置及显示装置 技术领域
本公开涉及显示技术领域，具体而言，涉及一种弯折机构及显示装置。
背景技术
目前，可弯折的柔性显示面板的应用越来越广泛，在使用过程中，用户可将其弯折呈弯折状态或使其展开呈平面状态，从而实现形态变换，适应不用的使用场景。相关技术中，通常要为柔性显示面板安装弯折装置，但是弯折过程中，弯折区域容易发生起皱、损坏等问题。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本公开的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
公开内容
本公开的目的提供一种弯折机构及显示装置。
根据本公开的一个方面，提供一种弯折装置，用于柔性显示面板，所述弯折装置包括：
支撑板，具有相背的第一面和第二面；
升降板，设于所述第一面背离所述第二面的一侧，且与所述第一面之间具有间隙；
转动板，设于所述第一面背离所述第二面的一侧，且沿第一方向分布于所述升降板的一侧；所述转动板与所述支撑板转动连接，并能在弯折位置和展开位置间转动；在所述展开位置，所述转动板与所述支撑板共面；在所述弯折位置，所述转动板与所述支撑板位于不同平面；所述转动板用于与所述柔性显示面板贴附，以带动所述柔性显示面板展开或弯折；
传动组件，设于所述支撑板，且与所述转动板连接；
第一弹性件，设于所述升降板和所述支撑板之间，用于向所述升降 板施加朝向所述第一面的作用力；
推动轮，设于所述升降板和所述支撑板之间，且通过所述传动组件与所述转动板连接；所述推动轮能在所述转动板的带动下转动；所述推动轮的轮廓至少包括远端点和近端点，所述远端点和所述近端点与所述推动轮的转动轴线的距离不同；
在所述转动板由所述弯折位置转动至所述展开位置的过程中，能带动所述推动轮向背离所述第一面的方向推动所述升降板至支撑位置；在所述转动板由所述展开位置转动至所述弯折位置的过程中，所述第一弹性件使所述升降板向靠近所述第一面的方向移动至避让位置。
在本公开的一种示例性实施例中，所述传动组件包括：
输入齿轮，固定于所述转动板上，且所述输入齿轮的轴向为垂直于所述第一方向的第二方向；
输出齿轮，转动连接于所述支撑板，所述输出齿轮的转动轴线沿所述第二方向延伸，且所述输出齿轮与所述推动轮同轴连接；
传动齿轮组，啮合于所述输入齿轮和所述输出齿轮之间。
在本公开的一种示例性实施例中，所述传动齿轮组包括：
第一传动齿轮，与所述输入齿轮啮合；
第二传动齿轮，与所述输出齿轮啮合；
传动轴，沿所述第二方向转动连接于所述支撑板，且一端与所述第一传动齿轮连接，另一端与所述第二传动齿轮连接。
在本公开的一种示例性实施例中，所述输入齿轮为形成于所述转动板上的半圆齿轮。
在本公开的一种示例性实施例中，所述支撑板设有沿垂直于所述第一面的方向贯通的安装孔和安装槽，所述推动轮至少部分位于所述安装孔内，所述第二传动齿轮和所述输出齿轮至少部分位于所述安装槽内。
在本公开的一种示例性实施例中，所述转动板通过铰接机构与所述支撑板转动连接，所述铰接机构包括：
固定部，固定于所述支撑板；
转动部，固定于所述转动板，且与所述固定部和所述输入齿轮沿所述第二方向分布；所述转动部和所述固定部沿所述第二方向的中轴线与 所述输入齿轮的中轴线共线；所述转动部靠近所述固定部的表面设有弧形的滑槽；
铰接销，一端穿入所述固定部，另一端可滑动地配合于所述滑槽内；
在所述转动板在所述展开位置和所述弯折位置间转动时，所述铰接销沿所述滑槽滑动，且在所述转动板位于所述展开位置时，所述铰接销位于所述滑槽的一端，在所述转动板位于所述弯折位置时，所述铰接销位于所述滑槽的另一端。
在本公开的一种示例性实施例中，所述铰接销包括销体和位于所述销体一端的销头，所述销头外周凸出于所述销体的外周；所述销头可滑动地配合于所述滑槽内，所述销体背离所述销头的一端位于所述固定部内；
所述铰接机构还包括：
第二弹性件，套设于所述销体外，且一端抵接于所述销头，另一端抵接于所述固定部；所述第二弹性件处于沿所述铰接销的轴向被压缩的状态。
在本公开的一种示例性实施例中，所述销头背离所述销体的表面为球面，所述滑槽的底面的两端具有与所述销头的形状匹配的凹坑；
在所述转动板位于所述展开位置时，所述铰接销位于所述滑槽的一所述凹坑内；在所述转动板位于所述弯折位置时，所述铰接销位于所述滑槽的另一所述凹坑内。
在本公开的一种示例性实施例中，所述固定部开设有盲孔，所述盲孔内设有台阶；所述铰接销和所述第二弹性件均伸入所述盲孔，且所述第二弹性件夹持于所述台阶和所述销头之间。
在本公开的一种示例性实施例中，同一所述转动板通过两个所述铰接机构与所述支撑板连接，且两个所述铰接机构共用同一所述固定部，两个所述铰接机构的限位部对称分布于所述固定部的两侧。
在本公开的一种示例性实施例中，所述转动板设有连接于两个所述铰接机构的所述转动部之间加强筋，所述铰接销位于所述加强筋一侧。
在本公开的一种示例性实施例中，所述推动轮为凸轮或偏心轮。
在本公开的一种示例性实施例中，所述转动板的数量为两个，且两 个所述转动板沿所述第一方向分布于所述升降板的两侧，并能相向或背向转动；
所述推动轮的数量为两个，每个所述推动轮通过一所述传动组件与一所述转动板连接。
在本公开的一种示例性实施例中，两个所述推动轮沿所述推动轮的轴向分布。
在本公开的一种示例性实施例中，所述升降板包括底板和位于所述底板靠近所述第一面的表面的凸台，所述第一弹性件连接于所述凸台和所述第一面之间。
在本公开的一种示例性实施例中，所述升降板靠近所述第一面的表面设有定位柱，所述第一弹性件为弹簧，且所述第一弹性件套设于所述定位柱外，并与所述定位柱连接。
在本公开的一种示例性实施例中，所述第一面的边缘设有向背离所述第一面的方向延伸的支撑臂，且所述支撑臂位于所述升降板一侧；
在所述转动板位于所述展开位置时，所述支撑臂抵接于所述转动板靠近所述第一面的表面；在所述转动板位于所述弯折位置时，所述转动板位于所述支撑臂和所述升降板之间。
根据本公开的一个方面，提供一种显示装置，包括：
柔性显示面板，具有相背的出光面和背光面；
上述任意一项所述弯折装置，在所述转动板位于所述展开位置时，所述背光面贴附于所述转动板背离所述第一面的表面。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本公开一实施方式中弯折装置的***图。
图2为本公开一实施方式中弯折装置展开后的装配图。
图3为本公开一实施方式中弯折装置展开后的截面图。
图4为本公开一实施方式中弯折装置弯折后的装配图。
图5为本公开一实施方式中弯折装置弯折后的截面图。
图6为本公开一实施方式中弯折装置的局部俯视图。
图7为本公开一实施方式中弯折装置的侧视图。
图8为图7中A部的局部截面图。
图9为图8的局部放大图。
图10为本公开一实施方式中弯折装置的支撑板的示意图。
图11为本公开一实施方式中弯折装置的升降板的示意图。
图12为本公开一实施方式中弯折装置的第一弹性件的示意图。
图13为本公开一实施方式中弯折装置的转动板的示意图。
图14为本公开一实施方式中弯折装置的转动板和转动部的示意图。
图15为本公开一实施方式中弯折装置的铰接销和第二弹性件的示意图。
附图标记说明：
1、支撑板；11、支撑臂；110、第一面；120、第二面；101、安装孔；102、安装槽；2、升降板；21、底板；22、凸台；221、定位柱；3、转动板；4、传动组件；41、输入齿轮；42、输出齿轮；43、传动齿轮组；431、传动轴；432、第一传动齿轮；433、第二传动齿轮；5、第一弹性件；6、推动轮；7、铰接机构；71、固定部；711、盲孔；712、台阶；72、转动部；721、滑槽；722、凹坑；73、铰接销；731、销体；732、销头；74、第二弹性件；75、加强筋；8、转轴。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本公开将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似 的结构，因而将省略它们的详细描述。此外，附图仅为本公开的示意性图解，并非一定是按比例绘制。
虽然本说明书中使用相对性的用语，例如“上”“下”来描述图标的一个组件对于另一组件的相对关系，但是这些术语用于本说明书中仅出于方便，例如根据附图中所述的示例的方向。能理解的是，如果将图标的装置翻转使其上下颠倒，则所叙述在“上”的组件将会成为在“下”的组件。当某结构在其它结构“上”时，有可能是指某结构一体形成于其它结构上，或指某结构“直接”设置在其它结构上，或指某结构通过另一结构“间接”设置在其它结构上。
用语“一个”、“一”、“该”、“所述”和“至少一个”用以表示存在一个或多个要素/组成部分/等；用语“包括”和“具有”用以表示开放式的包括在内的意思并且是指除了列出的要素/组成部分/等之外还可存在另外的要素/组成部分/等；用语“第一”和“第二”仅作为标记使用，不是对其对象的数量限制。
相关技术中，可弯折的柔性显示面板具有出光面和背光面，其弯折方式包括内折和外折两种方式，外折是指弯折后背光面趋近于贴合的方式，内折是指弯折后出光面趋近于贴合的弯折方式。为了在弯折时支撑柔性显示面板，通常需要将柔性显示面板安装于弯折装置，弯折装置一般包括两个能相对转动的平板和两个平板之间的连接板，通过使两个平板相对于连接板转动，可带动柔性显示面板弯折。对于采用内折方式的柔性显示面板而言，在其弯折过程中，柔性显示面板对应于连接板的区域需要发生的形变，形成弯折区域，才能保证顺利弯折，但由于连接板固定不动的顶抵柔性显示面板，使得弯折区域无法发生正常的弯折形变，而容易起皱，导致柔性显示面板容易损坏。
本公开实施方式提供了一种弯折装置，用于柔性显示面板，该柔性显示面板可为OLED(Organic Light-Emitting Diode，有机发光二极管)显示面板，且该柔性显示面板具有相背的出光面和背光面。
如图1-图6所示，本公开的弯折装置可包括支撑板1、升降板2、转动板3、传动组件4、第一弹性件5和推动轮6，其中：
支撑板1具有相背的第一面110和第二面120；
升降板2设于第一面110背离第二面120的一侧，且与第一面110之间具有间隙；
转动板3设于第一面110背离第二面120的一侧，且沿第一方向分布于升降板2的一侧；转动板3与支撑板1转动连接，并能在弯折位置和展开位置间转动；在展开位置，转动板3与支撑板1共面；在弯折位置，转动板3与支撑板1位于不同平面；转动板3用于与柔性显示面板贴附，以带动柔性显示面板展开或弯折；
传动组件4设于支撑板1，且与转动板3连接；
第一弹性件5设于升降板2和支撑板1之间，用于向升降板2施加朝向第一面110的作用力；
推动轮6，设于所述升降板2和所述支撑板1之间，且通过所述传动组件4与所述转动板3连接；所述推动轮6能在所述转动板3的带动下转动；推动轮6的轮廓至少包括远端点和近端点，远端点和近端点与推动轮6的转动轴线的距离不同；
在转动板3由弯折位置转动至展开位置的过程中，能带动推动轮6向背离第一面110的方向推动升降板2至支撑位置；在转动板3由展开位置转动至弯折位置的过程中，第一弹性件5使升降板2向靠近第一面110的方向移动至避让位置。
本公开实施方的弯折装置，在使用时，如图2和图3所示，可使转动板3处于展开位置，即与升降板2共面的位置，将柔性显示面板贴附于转动板3背离第一面110的表面，此时，柔性显示面板同时与转动板3和升降板2接触，但与升降板2之间可以不进行专门的连接，防止影响柔性显示面板正常弯曲；此时，推动轮6在升降板2靠近第一面110的表面支撑升降板2，使升降板2处于支撑位置，从而克服第一弹性件5向升降板2施加的朝向第一面110的拉力。
如图4和图5所示，若需要弯折柔性显示面板时，可手动或借助其他外力使转动板3转动，在转动板3的带动下，柔性显示面板弯折；同时，推动轮6转动，升降板2逐渐失去推动轮6的支撑力，从而在第一弹性件5的作用下，向靠近第一面110的方向移动至避让位置，由于升降板2向第一面110移动，从而为柔性显示面板的弯折区域留出容纳空 间，保证柔性显示面板可以顺利被弯折，且升降板2在移动的过程中，可始终支撑柔性显示面板，从而实现对弯折区域的动态支撑。
在弯折和展开柔性显示面板的过程中，升降板2可对柔性显示面板的弯折区进行支撑，防止弯折区域损坏。
下面对本公开实施方式弯折装置的各部分进行详细说明：
如图1-图5以及图10所示，支撑板1为平板结构，其形状和尺寸在此不做特殊限定。支撑板1具有相背的第一面110和第二面120，第一面110和第二面120可为相互平行的平面。
如图1-图5以及图11所示，升降板2可为平板结构，可将转动板3与柔性显示面板贴附，以便通过转动板3的转动带动柔性显示面板展开或弯折。升降板2的形状可以是矩形或其它形状。举例而言，升降板2为矩形的平板结构，其在宽度方向上的宽度小于支撑板1的宽度，升降板2在其长度方向上的长度大于支撑板1的长度。
升降板2设于支撑板1的第一面110背离第二面120的一侧，且升降板2可与第一面110平行设置，且与第一面110之间具有间隙。升降板2能沿垂直于第一面110的方向在支撑位置和避让位置之间往复平移，使得升降板2在平移过程中始终与第一面110平行，支撑位置位于避让位置背离第一面110的一侧。
如图1-图5以及图12所示，第一弹性件5可设于升降板2和支撑板1之间，用于向升降板2施加朝向第一面110的作用力，使升降板2具有移动至避让位置的趋势。第一弹性件5可以是弹簧，也可以是橡皮筋等其它能发生弹性变形，以向升降板2施加上述作用力的器件。第一弹性件5的数量可以是一个或多个。
在本公开的一些实施方式中，第一弹性件5为弹簧，为了便于安装弹簧，升降板2靠近第一面110的表面可设有定位柱221，第一弹性件5可套设于定位柱221外，并与定位柱221连接。定位柱221的高度小于升降板2位于避让位置时，升降板2与第一面110之间的距离。
在本公开的一些实施方式中，如图1、图3、图5和图11所示，升降板2可包括底板21和凸台22，其中：
底板21为平行于第一面110的平板结构；
凸台22位于底板21靠近第一面110的表面，凸台22的形状在此不做特殊限定。第一弹性件5可连接于凸台22和第一面110之间，例如，第一弹性件5为弹簧，凸台22背离底板21的表面，即升降板2靠近第一面110的表面，可设有上述的定位柱221，第一弹性件5可套设于定位柱221外，并与定位柱221连接。
如图1-图5以及图13所示，转动板3可为平板结构，其形状可以是矩形或其它形状。转动板3设于第一面110背离第二面120的一侧，也就是说，转动板3与升降板2位于支撑板1的同一侧。同时，转动板3可沿第一方向分布于升降板2的一侧，且转动板3可与支撑板1转动连接，并能在弯折位置和展开位置间转动。第一方向如图1中X方向所示。
在本公开的一些实施方式中，转动板3和升降板2的形状均为矩形，二者的长度相同，转动板3的宽度大于升降板2的宽度。转动板3的长边和升降板2的长边平行设置。
实现转动板3与支撑板1转动连接的具体实施方式方式将在下文中进行详细说明。
在转动板3位于展开位置时，转动板3与支撑板1共面，即转动板3背离第一面110的表面与支撑板1背离第一面110的表面位于同一平面，也即转动板3与支撑板1的夹角为180°。在转动板3位于弯折位置时，转动板3与支撑板1位于不同平面，也就是说，转动板3与支撑板1之间呈一定的夹角，该夹角大于0°，小于180°。例如，在转动板3位于弯折位置时，转动板3与支撑板1的夹角为90°。本公开的转动板3的转动角度不做特殊限定，可根据柔性显示面板所能承受的最大弯折幅度而定。
为了对转动板3进行限位，使其转动至展开位置后，无法在向靠近支撑板1的方向转动，从而保持与升降板2共面的状态，以便使展开后的柔性显示面板更加平整。在本公开的一些实施方式中，支撑板1的第一面110的边缘可设有向背离第一面110的方向延伸的支撑臂11，且支撑臂11位于升降板2一侧。在转动板3位于展开位置时，支撑臂11抵接于转动板3靠近第一面110的表面，从而对转动板3进行支撑。在转动板3位于弯折位置时，转动板3位于支撑臂11和升降板2之间，避免 转动板3的转动被干涉。
如图1-图6所示，推动轮6设于升降板2和支撑板1之间，且通过设于支撑板1上的传动组件4与转动板3连接。推动轮6的转动轴线与转动板3的转动轴线平行，且推动轮6能在转动板3的带动下转动。推动轮6的轮廓至少包括远端点和近端点，远端点和近端点与推动轮6的转动轴线的距离不同，从而可配合第一弹性件5的作用力实现升降板2的往复平移。具体而言：
如图2和图3所示，在转动板3由弯折位置转动至展开位置的过程中，能通过传动组件4带动推动轮6转动，直至远端点与升降板2抵接(例如：推动轮6与凸台22靠近第一面110的表面抵接)，从而向背离第一面110的方向推动升降板2至支撑位置，支撑位置为推动轮6推动升降板2向背离第一面110的方向移动的最远位置。
如图4和图5所示，在转动板3由展开位置转动至弯折位置的过程中，远端点不再与升降板2接触，第一弹性件5对升降板2的作用力可使升降板2向靠近第一面110的方向移动，直至移动至避让位置。
在本公开的一些实施方式中，升降板2在避让位置时，可与推动轮6抵接，具体而言：在第一弹性件5的拉力的作用下，升降板2从支撑位置向第一面110移动至避让位置，此时，推动轮6的近端点与升降板2抵接，且第一弹性件5仍处于拉伸状态。也就是说，在第一弹性件5的拉力的作用下，升降板2始终与推动轮6接触，只是由于推动轮6存在远端点和近端点，导致其可以在支撑位置和避让位置间移动。
在本公开的另一些实施方式中，升降板2在避让位置时，可与推动轮6分离，具体而言：在升降板2从支撑位置向第一面110移动至避让位置时，第一弹性件5向升降板2施加的作用力能使升降板2向第一面110移动一段距离，但不足以使升降板2与推动轮6的近端点接触，或者，在升降板2与推动轮6的近端点接触前，第一弹性件5已经恢复至自由状态(既不拉伸，也不压缩)，则升降板2停止移动。此时，升降板2的位置即为避让位置。
如图1-图5所示，在本公开的一些实施方式中，推动轮6可为凸轮，其轮廓中距离转动轴线最远的点即为远端点，距离转动轴线最近的点即 为近端点。凸轮的轮廓可为渐开线或其它形状，在此不对其形状做特殊限定。
在本公开的另一些实施方式中，推动轮6还可以是偏心轮，其轮廓可为圆形，但圆心位于转动轴线以外，距离转动轴线最远的一点即为远端点，距离转动轴线最近的一点即为近端点。
下面对传动组件4进行示例性说明：
如图1-图7所示，在本公开的一些实施方式中，传动组件4可包括多个齿轮，通过多个齿轮逐级传动，带动推动轮6转动，具体而言，传动组件4可包括输入齿轮41、输出齿轮42和传动齿轮组43，其中：
输入齿轮41固定于转动板3上，并能与转动板3同步转动，同时，且输入齿轮41的轴向为垂直于第一方向的第二方向，第二方向如图1中Y方向所示。进一步的，输入齿轮41可为固定于转动板3靠近第一面110的表面(在转动板3位于展开位置时)的半圆齿轮，且该半圆齿轮可与转动板3一体成型。当然，输入齿轮41也可以是通过卡接等方式固定于转动板3上的独立结构。
输出齿轮42可转动连接于支撑板1，其转动轴线沿第二方向与凸轮的转动轴线共线，且输出齿轮42与所述推动轮6同轴连接，例如：输出齿轮42和推动轮6通过沿第二方向延伸的转轴8连接。从而可通过输出齿轮42带动推动轮6同步转动。
传动齿轮组43可啮合于输入齿轮41和输出齿轮42之间，在输入齿轮41转动时，可带动输出齿轮42转动。举例而言：传动齿轮组43可包括第一传动齿轮432、第二传动齿轮433和传动轴431，其中：
传动轴431转动连接于支撑板1。
第一传动齿轮432连接于传动轴431一端，且与输入齿轮41啮合。
第二传动齿轮433连接于传动轴431的另一端，且与输出齿轮42啮合。
在转动板3带动输入齿轮41转动时，可带动第一传动齿轮432转动，第一传动齿轮432可通过传动轴431带动第二传动齿轮433同步转动，而第二传动齿轮433可带动输出齿轮42转动，从而使推动轮6转动。
当然，传动组件4的结构并不限于上述的结构，在本公开的其它实施方式中，传动组件4还可以采用其它结构，只要能使转动板3带动推动轮6转动即可。
如图1-图7和图10所示，为了便于安装上述传动组件4和推动轮6，在本公开的一些实施方式中，可在支撑板1上开设安装孔101和安装槽102，安装孔101和安装槽102均沿垂直于第一面110的方向贯通支撑板1，且安装槽102还可沿第一方向贯通支撑板1。推动轮6至少部分位于安装孔101内，升降板2与安装孔101正对，以便推动轮6与升降板2接触。第二传动齿轮433和输出齿轮42至少部分位于安装槽102内，连接输出齿轮42和推动轮6的转轴8可由安装槽102穿入安装孔101内，且与支撑板1转动配合。第一传动齿轮432和输入齿轮41可位于支撑板1以外。
下面对转动板3与支撑板1转动连接的方式进行示例性说明：
如图1、图7-图9以及图13-图15所示，在本公开的一些实施方式中，转动板3可通过铰接机构7与支撑板1转动连接，该铰接机构7可包括固定部71、转动部72和铰接销73，其中：
固定部71可固定于支撑板1，举例而言，支撑板1具有在第一方向上相背的两个侧边，固定部71可固定于支撑板1的靠近转动板3的侧边。固定部71可以是通过卡接或其它连接方式固定于支撑板1的独立部件，也可以是一体成型于支撑板1上的凸起结构。
转动部72固定于转动板3靠近第一面110的表面(在转动板3位于展开位置时)，且与固定部71和输入齿轮41沿第二方向分布。转动部72和固定部71沿第二方向的中轴线与输入齿轮41的中轴线共线。转动部72靠近固定部71的表面设有弧形的滑槽721，滑槽721的曲率中心位于转动部72沿第二方向的中轴线上，且滑槽721的曲率与输入齿轮41的曲率相同。转动部72可为一体成型与弧形，当然，也可以是其它形状。
如图7-图9所示，铰接销73的一端穿入固定部71，另一端可滑动地配合于滑槽721内。
在转动板3在展开位置和弯折位置间转动时，铰接销73沿滑槽721滑动，且在转动板3位于展开位置时，铰接销73位于滑槽721的一端， 在转动板3位于弯折位置时，铰接销73位于滑槽721的另一端；从而可通过滑槽721限定转动板3转动的幅度。同时，铰接销73可与滑槽721的内壁接触，利用铰接销73和滑槽721的内壁的摩擦力可阻碍转动板3自由转动，在使转动板3转动的外力消失后，转动板3不会自由活动，从而实现随停功能。
进一步的，如图9和图15所示，为了增大滑槽721与铰接销73的摩擦力，在本公开的一些实施方式中，铰接销73包括销体731和位于销体731一端的销头732，销头732外周凸出于销体731的外周，例如，销头732为球缺结构，销体731为圆柱结构，销体731的直径小于销头732的直径。
销头732可滑动地配合于滑槽721内，且与滑槽721的底面和侧壁接触。销体731背离销头732的一端位于固定部71内。
铰接机构7还包括第二弹性件74，其可套设于销体731外，且一端抵接于销头732靠近销体731的表面，另一端抵接于固定部71，具体而言，固定部71对应于销体731的位置可开设有盲孔711，盲孔711内设有台阶712，铰接销73和第二弹性件74均伸入盲孔711，且第二弹性件74夹持于台阶712和销头732之间。
第二弹性件74始终处于沿铰接销73的轴向被压缩的状态，从而增大销头732对滑槽721底面的压力，使摩擦力增大，进一步提升随停效果。
如图9和图14所示，为了转动板3能限位于弯折位置和展开位置，在本公开的一些实施方式中，销头732背离销体731的表面为球面，即销头732可为球缺结构；同时，滑槽721的底面的两端开设与销头732的形状匹配的凹坑722，即凹坑722的内表面为球面。
在转动板3位于展开位置时，销头732位于滑槽721的一凹坑722内；在转动板3位于弯折位置时，销头732位于滑槽721的另一凹坑722内。若要使销头732滑出凹坑722，则需要向转动板3施加较大的外力，从而可将转动板3定位在展开位置和弯折位置。
如图1-图5所示，在本公开的一些实施方式中，同一转动板3可通过两个上述的铰接机构7与支撑板1连接，且两个铰接机构7可沿第二 方向分布。进一步的，两个铰接机构7可共用同一固定部71，而两个铰接机构7的限位部可对称分布于该固定部71的两侧，两个铰接机构7的铰接销73的中轴线共线。铰接机构7的详细结构可参考上文的实施方式，在此不再赘述。
进一步的，可在转动板3上设置连接于两个铰接机构7的转动部72之间加强筋75，对两个转动部72进行支撑，提高二者的强度，使其不易变形。铰接销73位于加强筋75的一侧，避免与加强筋75发生干涉。
如图1-图5所示，在本公开的一些实施方式中，转动板3的数量可为两个，且两个转动板3沿第一方向对称分布于升降板2的两侧，且均与支撑板1转动连接，从而可相向或背向转动，但始终位于支撑板1的第一面110背离第二面120的一侧。两个转动板3均可通过上述的铰接机构7与支撑板1转动连接，两个转动板3的铰接机构7关于升降板2对称设置，在此不再详述其具体结构。
相应的，如图1-图5所示，在本实施方式中，推动轮6的数量也为两个，且分别通过传动组件4与两个转动板3一一对应的连接，即每个推动轮6通过一传动组件4与一转动板3连接。两个传动组件4关于升降板2沿第二方向的中轴线对称分布，两个推动轮6可同时或独立与第一弹性件5配合实现升降板2的移动。此外，为了避免两个推动轮6在转动时互相干涉，可使二者沿垂直于第一方向的第二方向分布，即沿推动轮6的轴向分布，即沿第二方向分布，从而避免发生碰撞。
在两个转动板3均位于展开位置时，升降板2位于支撑位置，转动板3与升降板2共面，从而对柔性显示面板进行支撑。在两个转动板3均位于弯折位置时，升降板2位于避让位置，转动板3与升降板2呈一定的夹角，使柔性显示面板弯折，且弯折区域抵接于升降板2。
本公开实施方式还提供一种显示装置，该显示装置可包括柔性显示面板及弯折装置，其中：
柔性显示面板具有相背的出光面和背光面，其可在外力作用下弯折。
弯折装置为上述任意实施方式的弯折装置，其结构和工作原理在此在赘述。在转动板3位于展开位置时，背光面贴附于转动板3背离第一面110的表面。
本公开的显示装置的有益效果可参考上文弯折装置的有益效果，在此不再详述，该显示装置可以是手机、平板电脑、电视等具有图像显示功能电子设备。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由所附的权利要求指出。

Claims (18)

  1. 一种弯折装置，用于柔性显示面板，其中，所述弯折装置包括：
    支撑板，具有相背的第一面和第二面；
    升降板，设于所述第一面背离所述第二面的一侧，且与所述第一面之间具有间隙；
    转动板，设于所述第一面背离所述第二面的一侧，且沿第一方向分布于所述升降板的一侧；所述转动板与所述支撑板转动连接，并能在弯折位置和展开位置间转动；在所述展开位置，所述转动板与所述支撑板共面；在所述弯折位置，所述转动板与所述支撑板位于不同平面；所述转动板用于与所述柔性显示面板贴附，以带动所述柔性显示面板展开或弯折；
    传动组件，设于所述支撑板，且与所述转动板连接；
    第一弹性件，设于所述升降板和所述支撑板之间，用于向所述升降板施加朝向所述第一面的作用力；
    推动轮，设于所述升降板和所述支撑板之间，且通过所述传动组件与所述转动板连接；所述推动轮能在所述转动板的带动下转动；所述推动轮的轮廓至少包括远端点和近端点，所述远端点和所述近端点与所述推动轮的转动轴线的距离不同；
    在所述转动板由所述弯折位置转动至所述展开位置的过程中，能带动所述推动轮向背离所述第一面的方向推动所述升降板至支撑位置；在所述转动板由所述展开位置转动至所述弯折位置的过程中，所述第一弹性件使所述升降板向靠近所述第一面的方向移动至避让位置。
  2. 根据权利要求1所述的弯折装置，其中，所述传动组件包括：
    输入齿轮，固定于所述转动板上，且所述输入齿轮的轴向为垂直于所述第一方向的第二方向；
    输出齿轮，转动连接于所述支撑板，所述输出齿轮的转动轴线沿所述第二方向延伸，且所述输出齿轮与所述推动轮同轴连接；
    传动齿轮组，啮合于所述输入齿轮和所述输出齿轮之间。
  3. 根据权利要求2所述的弯折装置，其中，所述传动齿轮组包括：
    第一传动齿轮，与所述输入齿轮啮合；
    第二传动齿轮，与所述输出齿轮啮合；
    传动轴，沿所述第二方向转动连接于所述支撑板，且一端与所述第一传动齿轮连接，另一端与所述第二传动齿轮连接。
  4. 根据权利要求2所述的弯折装置，其中，所述输入齿轮为形成于所述转动板上的半圆齿轮。
  5. 根据权利要求3所述的弯折装置，其中，所述支撑板设有沿垂直于所述第一面的方向贯通的安装孔和安装槽，所述推动轮至少部分位于所述安装孔内，所述第二传动齿轮和所述输出齿轮至少部分位于所述安装槽内。
  6. 根据权利要求2所述的弯折装置，其中，所述转动板通过铰接机构与所述支撑板转动连接，所述铰接机构包括：
    固定部，固定于所述支撑板；
    转动部，固定于所述转动板，且与所述固定部和所述输入齿轮沿所述第二方向分布；所述转动部和所述固定部沿所述第二方向的中轴线与所述输入齿轮的中轴线共线；所述转动部靠近所述固定部的表面设有弧形的滑槽；
    铰接销，一端穿入所述固定部，另一端可滑动地配合于所述滑槽内；
    在所述转动板在所述展开位置和所述弯折位置间转动时，所述铰接销沿所述滑槽滑动，且在所述转动板位于所述展开位置时，所述铰接销位于所述滑槽的一端，在所述转动板位于所述弯折位置时，所述铰接销位于所述滑槽的另一端。
  7. 根据权利要求6所述的弯折装置，其中，所述铰接销包括销体和位于所述销体一端的销头，所述销头外周凸出于所述销体的外周；所述销头可滑动地配合于所述滑槽内，所述销体背离所述销头的一端位于所述固定部内；
    所述铰接机构还包括：
    第二弹性件，套设于所述销体外，且一端抵接于所述销头，另一端抵接于所述固定部；所述第二弹性件处于沿所述铰接销的轴向被压缩的状态。
  8. 根据权利要求7所述的弯折装置，其中，所述销头背离所述销体 的表面为球面，所述滑槽的底面的两端具有与所述销头的形状匹配的凹坑；
    在所述转动板位于所述展开位置时，所述铰接销位于所述滑槽的一所述凹坑内；在所述转动板位于所述弯折位置时，所述铰接销位于所述滑槽的另一所述凹坑内。
  9. 根据权利要求7所述的弯折装置，其中，所述固定部开设有盲孔，所述盲孔内设有台阶；所述铰接销和所述第二弹性件均伸入所述盲孔，且所述第二弹性件夹持于所述台阶和所述销头之间。
  10. 根据权利要求6所述的弯折装置，其中，同一所述转动板通过两个所述铰接机构与所述支撑板连接，且两个所述铰接机构共用同一所述固定部，两个所述铰接机构的限位部对称分布于所述固定部的两侧。
  11. 根据权利要求10所述的弯折装置，其中，所述转动板设有连接于两个所述铰接机构的所述转动部之间加强筋，所述铰接销位于所述加强筋一侧。
  12. 根据权利要求1所述的弯折装置，其中，所述推动轮为凸轮或偏心轮。
  13. 根据权利要求1-12任一项所述的弯折装置，其中，所述转动板的数量为两个，且两个所述转动板沿所述第一方向分布于所述升降板的两侧，并能相向或背向转动；
    所述推动轮的数量为两个，每个所述推动轮通过一所述传动组件与一所述转动板连接。
  14. 根据权利要求13所述的弯折装置，其中，两个所述推动轮沿所述推动轮的轴向分布。
  15. 根据权利要求1所述的弯折装置，其中，所述升降板包括底板和位于所述底板靠近所述第一面的表面的凸台，所述第一弹性件连接于所述凸台和所述第一面之间。
  16. 根据权利要求1所述的弯折装置，其中，所述升降板靠近所述第一面的表面设有定位柱，所述第一弹性件为弹簧，且所述第一弹性件套设于所述定位柱外，并与所述定位柱连接。
  17. 根据权利要求1所述的弯折装置，其中，所述第一面的边缘设 有向背离所述第一面的方向延伸的支撑臂，且所述支撑臂位于所述升降板一侧；
    在所述转动板位于所述展开位置时，所述支撑臂抵接于所述转动板靠近所述第一面的表面；在所述转动板位于所述弯折位置时，所述转动板位于所述支撑臂和所述升降板之间。
  18. 一种显示装置，其中，包括：
    柔性显示面板，具有相背的出光面和背光面；
    权利要求1-17任一项所述弯折装置，在所述转动板位于所述展开位置时，所述背光面贴附于所述转动板背离所述第一面的表面。
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