CN110675746B - Folding display device and folding mobile phone - Google Patents

Abstract

A folding display device comprises a folding hinge and a variable-pitch device rotationally assembled on the folding hinge, wherein the folding hinge comprises a main shaft inserted with a rotating shaft, a plurality of strip-shaped bodies hinged on two lateral sides of the main shaft and a rotating plate, the variable-pitch device comprises a rotating seat rotationally fixed on the rotating shaft, a transmission part assembled on the rotating seat and capable of moving in the lateral direction of the rotating seat, a connecting seat sleeved on the rotating seat and capable of moving in the lateral direction of the rotating seat, a driving rod rotationally matched with the main shaft and driving the transmission part, and a linkage rod, the rotating seat and the rotating plate are further provided with a first engaging part and a second engaging part which are mutually slidably matched, the linkage rod is sequentially provided with a first rotating supporting part, a second rotating supporting part and a third rotating supporting part which are rotationally fixed on the rotating seat, the connecting seat and the transmission part respectively, and the rotating seat is provided with a communicating hole corresponding to the position of the, and a flat spring is also connected between the connecting seat and the rotating seat.

Description

Folding display device and folding mobile phone

Technical Field

The present invention relates to the field of communications electronics, and more particularly, to a foldable display device and a foldable mobile phone.

Background

With the development of the folding screen technology, the folding screen mobile phone has become a hot spot technology. Although the folding screen can be bent, the 180-degree bending cannot be realized, and the bent part still needs to keep a certain R angle, otherwise the screen can be damaged. The existing folding mode is divided into inward folding and outward folding, namely the screen is positioned at the inner side or the outer side after being folded, for example, Mate X issued by Huawei is outward folding, but the outward folding has the problems that the screen is in an exposed state and is easily scratched by a hard object, and the folding screen is fragile.

No matter the folding screen is folded outwards or inwards, the problem to be solved is how to ensure that when the folding screen is bent, the bending mechanism is adapted to the R-angle radian required by the bending part of the screen, at the moment, the inner side of the bending part of the folding screen can shorten the slight distance, while the outer side of the folding screen can lengthen the slight distance, at the moment, the parts tightly attached to the folding screen must keep synchronous change, otherwise, the screen can be damaged by extrusion. And guarantee that there is support in the folding screen back, otherwise unsettled screen can cause the damage when the finger is pressed. The patent application No. 201920305522.0 of the people's republic of china discloses a foldable display device, wherein the folding plates are fixed at both ends due to their long lengths, and thus, when folded, the folding plates are easily warped and cannot be kept flat.

Disclosure of Invention

In view of the above, it is desirable to provide a foldable display device and a foldable mobile phone, in which the distance between the foldable display device and the foldable mobile phone is changed in the unfolded and folded state to accommodate the problem that the folded screen may be damaged due to the decrease of the inner and outer lengths and the increase of the outer length.

In order to solve the technical problem, the application provides a folding display device, which comprises a folding hinge and a variable-pitch device rotationally assembled on the folding hinge, wherein the folding hinge comprises a main shaft with a rotating shaft inserted therein, a plurality of strip-shaped bodies hinged on two transverse sides of the main shaft and a rotating plate, the variable-pitch device comprises a rotating seat rotationally fixed on the rotating shaft, a transmission member assembled on the rotating seat and capable of moving in the transverse direction of the rotating seat, a connecting seat sleeved on the rotating seat and capable of moving in the transverse direction of the rotating seat, a driving rod rotationally matched with the main shaft and driving the transmission member, and a linkage rod, wherein the rotating seat and the rotating plate are further provided with a first engaging part and a second engaging part which are mutually slidably matched, and the linkage rod is sequentially provided with a first engaging part and a second engaging part which are rotationally fixed on the rotating seat, the connecting seat and the transmission member respectively, The rotating seat is provided with a communicating hole corresponding to the position of the linkage rod, a flat spring is further connected between the connecting seat and the rotating seat, the connecting seat is driven to rotate together with the rotating seat, the rotating plate and the driving rod, the driving rod pushes or pulls the driving part to move along the transverse direction of the rotating seat, so that the linkage rod is driven to rotate by the first rotating support part to drive the connecting seat to move along the transverse direction of the rotating seat, and the distance between the connecting seats on the two transverse sides of the spindle is changed.

Preferably, the rotating base includes a base body, a rotating portion extending from the base body and rotationally fixed to the main shaft, and a fitting portion formed by recessing the base body and extending away from the rotating portion; the matching part comprises a part formed on the base body and a part formed by extending outwards from the transverse edge of the base body.

Preferably, the matching portion includes a receiving portion formed by a recess and used for assembling the transmission member, a limiting portion formed by extending upward from two longitudinal sides of the receiving portion and then bending and extending oppositely and used for limiting the transmission member, a matching flange formed at the outer edge of two longitudinal sides of the receiving portion and used for matching the connecting seat, and a first rotation matching portion used for fixing the first rotation supporting portion.

Preferably, the transmission member includes a plate body portion, a fastening hole provided on the plate body portion and having a first opening on a lateral outer side, and a third rotation engaging portion provided at an end of the plate body portion away from the fastening hole to rotationally fix the third rotation supporting portion; the driving rod comprises a driving end which is rotatably arranged at the upper shaft end of the main shaft and is buckled in the buckling hole of the transmission piece.

Preferably, the connecting seat includes the main part and certainly the vertical both sides of main part are upwards extended earlier then perpendicular relative bending extend form with the gliding cooperation groove of cooperation flange cooperation of roating seat, be located be fixed with the casing respectively on the connecting seat of the horizontal both sides of main shaft, the casing of main shaft both sides passes through user's folding operation and rotates, and then drives the connecting seat rotates, the cooperation inslot pastes and has the gum cover, form the track groove on the gum cover, cooperation flange cartridge in track inslot and slidable.

Preferably, the transmission part further comprises an installation cavity arranged between the buckle hole and the third rotating fit part, a second opening is formed in the installation cavity and faces towards the limiting part of the rotary seat, a state control element is installed in the installation cavity, and a state control groove matched with the state control element is formed in the limiting part corresponding to the second opening.

Preferably, the state control member includes a base portion disposed in the mounting cavity, a holding end portion extending out of the second opening of the mounting cavity from the base portion, and an elastic member clamped between one end of the base portion and the inner wall of the mounting cavity, the state control groove includes an open state groove and a closed state groove, and the holding end portion is held in the open state groove and the closed state groove in the open state and the closed state, respectively.

Preferably, the spindle comprises a spindle body, and a fixing groove, a gear groove and a damping groove which are formed by sequentially sinking two ends of the spindle body outwards, a first partition part is formed between the fixing groove and the gear groove, a second partition part is formed between the gear groove and the damping groove, a third partition part is formed outside the damping groove, an incision is formed by cutting the outside of the third partition part, and the pair of rotating shafts are inserted into and pass through the damping groove, the gear groove and the partition groove from the incision.

Preferably, a pair of gears meshed with each other is fixed on a rotating shaft in the gear groove, a spring, a first damping block and a second damping block are sleeved on the rotating shaft in the damping groove, and fixing devices are installed and fixed on the strip-shaped body and the rotating plate on the fixing groove position and the transverse direction position of the main shaft.

Preferably, the fixing device includes a fixed female seat and a fixed male seat, the main shaft, each strip-shaped body and the rotating plate correspond to one fixed female seat or one fixed male seat respectively, the fixed male seat and the fixed female seat are connected with each other and can rotate, the fixed male seat and the fixed female seat are arranged at an interval, the fixed female seat and the fixed male seat include a seat base, a lower clearance portion arranged at the bottom of the seat base to accommodate the bump, and a screw hole penetrating through the seat base and communicating with the lower clearance portion, the fixed female seat further includes an arc-shaped groove extending from two longitudinal ends of the seat base to form a lower clearance portion, an upper clearance portion, and an arc-shaped groove located between the upper and lower clearance portions, and the fixed male seat further includes an arc-shaped block extending from two longitudinal ends of the seat base to cooperate with the arc-shaped groove to rotate.

In order to solve the technical problem, the application further provides a folding mobile phone, which comprises the folding display device.

The utility model provides a folding display device and folding cell-phone makes through the trace that sets up roating seat, driving medium, connecting seat, actuating lever and the aforementioned three of linkage the connecting seat makes naturally when rotating the actuating lever rotates and drives the driving medium is in the roating seat removes, and then passes through the linkage of trace is given the connecting seat makes position between the folding hinge both sides connecting seat produces the change, and then adjusts the folding screen and because of folding the length variation who causes the inside and outside cambered surface, avoids damaging.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application.

Fig. 1 is a perspective expanded view of a folding display device according to the present application;

FIG. 2 is a perspective view of another folded display device according to the present application;

FIG. 3 is a perspective expanded view and a partial enlarged view of the hinge strip of the folding hinge of the present application;

FIG. 4 is a perspective view of the principal axis of the hinge strip of the folding hinge of the present application and a partial enlarged view thereof;

FIG. 5 is an expanded view of the securing device of the folding hinge of the present application;

FIG. 6 is a perspective view of a first fixing member of the fixing device of the folding hinge of the present application;

FIG. 7 is a perspective view of a second attachment member of the attachment apparatus of the folding hinge of the present application;

FIG. 8 is a perspective view of the folding hinge of the present application and an enlarged view of a portion thereof;

FIG. 9 is an exploded perspective view of the foldable display device of the present application;

FIG. 10 is an exploded perspective view of the pitch device of the foldable display device of the present application;

fig. 11 is a perspective view of a rotating plate of a pitch varying device of the folding display device of the present application;

FIG. 12 is a perspective view of another angle of the rotating plate of the pitch device of the foldable display device of the present application;

FIG. 13 is a perspective view of a slider of the pitch device of the foldable display device of the present application;

FIG. 14 is a perspective view of another angle of the slider of the pitch device of the foldable display device of the present application;

fig. 15 is a perspective view of a connecting plate of a pitch changing apparatus of a folding display apparatus according to the present application;

FIG. 16 is a perspective view of the foldable display device of the present application in a folded state and a partially enlarged view thereof;

fig. 17 is a perspective view and a partial enlarged view of the folded display device of the present application with parts removed when the display device is in a folded state.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and 2, the foldable display device of the present application includes a foldable hinge, a synchronizingmechanism 30 assembled on the foldable hinge, and a distancevarying device 40 hinged on the foldable hinge.

Referring to fig. 1 to 8 and 16, the folding hinge includes a plurality ofhinge strips 10 hinged to each other at two ends, afixing device 20 for fixing thehinge strips 10, and a reinforcingrod 15.

Thehinge strip 10 comprises amain shaft 11 positioned in the middle, at least one strip-shaped body 12 respectively hinged on two sides of themain shaft 11, and arotating plate 13 hinged on the outer side of the strip-shaped body 12.

Thespindle 11 includes ashaft body 111, afixing groove 112, agear groove 114, a damping groove 115, afirst partition 117 between thefixing groove 112 and thegear groove 114, asecond partition 118 between thegear groove 114 and the damping groove 115, and athird partition 119 outside the damping groove 115, wherein thefixing groove 112, thegear groove 114, and the damping groove 115 are recessed in this order.

The inner side surface of thefixing groove 112 of themain shaft 11, the inner side surfaces of the bar-shaped body 1 and therotating plate 13 are in the same horizontal plane, thehinge strips 10 are respectively provided with aconvex block 101 in a protruding manner in the transverse direction of the position of thefixing groove 112, and theconvex blocks 101 are provided withscrew holes 102. Thespindle 11, thebar 12 and thelug 101 on therotating plate 13 are in the same straight line in the transverse direction.

Referring to fig. 2 and 16, the free end of themain shaft 11 protrudes outward to form ahinge portion 127,hinge grooves 128 are formed on both lateral sides of thehinge portion 127,hinge protrusions 129 andhinge grooves 135 hinged in thehinge grooves 128 are respectively formed on both lateral sides of the free end of the bar-shaped body 12 of themain shaft 11, and hinge protrusions hinged in thehinge grooves 135 of the bar-shaped body 12 are formed on the free end of the rotatingplate 13. Thehinge grooves 128, 135 are movably hinged to thehinge protrusion 129 by bolts (not numbered). Twostrip bodies 12 and arotating plate 13 are respectively hinged on two sides of themain shaft 11 in sequence. The design of the hinge structure at the free end of thehinge strip 10 is described in detail in the patent application CN201920305522.0, and will not be described in detail here.

Thefixing device 20 includes a fixedfemale seat 21 and a fixedmale seat 22 rotating in cooperation with the fixedfemale seat 21. Each of the female and male fixedseats 21, 22 includes aseat base 211, alower clearance portion 212 opened at the bottom of theseat base 211 for accommodating thebump 101, anupper clearance portion 213 opened at the top of theseat base 211, and ascrew hole 214 penetrating theseat base 211 and communicating the upper andlower clearance portions 212, 213. Thelower limit portion 215, theupper limit portion 216 and the arc-shaped groove 217 between theupper limit portion 215 and thelower limit portion 216 are respectively formed at two longitudinal ends of theseat base 211 of the female fixedseat 21 in an extending manner, and theupper limit portion 215 and thelower limit portion 216 at the two longitudinal ends of the female fixedseat 21 respectively extend in opposite directions in a transverse direction, that is, the extending directions of the arc-shaped grooves 217 at the two longitudinal ends of the female fixedseat 21 are opposite and are arranged in a point symmetry manner. The fixedmale seat 22 further comprises arc-shaped blocks 219 formed by extending from the two longitudinal ends of theseat base 211, the arc-shaped blocks 219 are matched with the arc-shaped grooves 217, and the arc-shaped blocks 219 at the two longitudinal ends of thefixed male seat 22 extend along opposite directions in the transverse direction and are arranged in point symmetry. Thearcuate segments 219 snap into thearcuate slots 217 and are rotatable within thearcuate slots 217.

Thefemale fixing seat 21 and themale fixing seat 22 of thefixing device 20 are screwed on theprotrusion 101 of thehinge strip 10 by a bolt or a screw (not shown), theprotrusion 101 is fitted into the lower avoidingportion 212, the bolt passes through thescrew hole 214 and is locked in thescrew hole 102 of theprotrusion 101, and a nut portion of the bolt is accommodated in the upper avoidingportion 213. A fixedfemale seat 21 is arranged on theconvex block 101 of themain shaft 11, a fixedmale seat 22 matched with the fixedfemale seat 21 is arranged on the strip-shaped body 12 close to themain shaft 11, and by analogy, a fixedfemale seat 21 or afixed male seat 22 is fixed on the rotatingplate 13 positioned at the outermost side, but the fixedfemale seat 21 or thefixed male seat 22 fixed on the rotatingplate 13 only needs to be provided with an arc-shaped groove 217 or an arc-shaped block 219 at one longitudinal end of theseat base 211.

Referring to fig. 4 and 8, after thefixing groove 112 of thespindle 11 is concavely formed, aconnection portion 113 is formed at the bottom of thefixing groove 112, and an inner surface of theconnection portion 113 is located on the same horizontal plane as that of the bar-shaped body 12 and therotating plate 13 in the unfolded state. The thickness of the connectingportion 113 is small, the force required to be carried by thespindle 11 is large, and the strength of the connectingportion 113 is not enough to support, so that a fixinghole 120 is provided at a position corresponding to theshaft body 111 at both sides of the fixinggroove 112 and thefirst partition 117, a reinforcingrod 15 is inserted above the fixinggroove 112, both ends of the reinforcingrod 15 are fixed in the fixinghole 120, and the reinforcingrod 15 is located above the fixingdevice 20.

The outer surface of the folding hinge is adhered to a folding screen through a folding plate to realize outward folding, and the folding plate is fixed on the variable-pitch device 40.

The utility model provides a folding hinge is through set up at middle part position department at least a set of willmain shaft 11, thebar 12 and change the fixed fixingdevice 20 ofboard 13, fixingdevice 20 realizes right through the mutual rotation of fixedfemale seat 21 and fixedpublic seat 22main shaft 11, thebar 12 and change the roughness ofboard 13 intermediate position department, avoid folding hinge'smain shaft 11, thebar 12 and change the unable relative position that keeps ofboard 13 and produce unsmooth problem.

Referring to fig. 1, fig. 2, fig. 4, fig. 9, and fig. 10, asynchronizing mechanism 30 of the present application is assembled on themain shaft 11, and thesynchronizing mechanism 30 includes at least a pair ofrotating shafts 31 and gears 35 respectively fixed on the pair ofrotating shafts 31.

A pair of shaft holes 121 arranged transversely are respectively arranged in the transverse direction on the first andsecond partition parts 117, 118 at the longitudinal two ends of thegear groove 114 of themain shaft 11, the transverse two sides of thegear groove 114 are provided withprotection parts 122 for coating the transverse side surfaces of thegear groove 114, and the transverse two sides of thegear groove 114 close to thefirst partition part 117 are provided withnotches 1141 for connecting thevariable pitch device 40.

The pair ofshafts 31 are respectively sleeved in the pair of shaft holes 121, the pair ofgears 35 are fixed on the pair ofshafts 31 and located in thegear grooves 114, and the pair ofgears 35 are engaged with each other. When the pair ofrotating shafts 31 are driven by thepitch varying device 40 to rotate, the gears move along with the relative movement of therotating shafts 31, so that the synchronization of the rotating amplitudes of the pair ofrotating shafts 31 is realized, and the damage to the folding screen caused by the inconsistent rotating amplitudes of the two sides of the folding screen is avoided.

Anotch 125 is formed by cutting the folded inner side surface of the free end of themain shaft 11 in the longitudinal direction, and thethird partition 119 penetrates a part of theshaft hole 121 at a position corresponding to thethird partition 121, that is, theshaft hole 121 penetrates thethird partition 119 and thesecond partition 118 in the longitudinal direction, and thefirst partition 117 is not penetrated. The pair of shaft holes 121 are respectively aligned on the same line. Thesecond partition portion 118 is located on one side of the damping groove 115 and protrudes to form a resistingportion 123, at least a part of theshaft hole 121 is located on and penetrates through the resistingportion 123, and thesecond partition portion 118 is located on one side of the damping groove 115 and located on the outer edge of the resistingportion 123 and provided with arotating hole 124. Thenotch 125 has a pair ofarc grooves 126 formed below theshaft hole 121. The stoppingportion 123 may also be formed to extend longitudinally from thethird partition 119 at one side of the damping groove 115.

The damping groove 115 is provided with aspring 32 sleeved outside the rotatingshaft 31, a first dampingblock 33 sleeved outside the rotatingshaft 31, and a second dampingblock 34 fixed on therotating shaft 31 and matched with the first dampingblock 33. Thespring 32 is clamped between thethird partition 119 and the first dampingblock 33, and the rear end of the second dampingblock 34 abuts against the abuttingportion 123. The first dampingblock 33 includes a main body portion (not shown), through holes (not shown) formed on two lateral sides of the main body portion for the tworotating shafts 31 to pass through, and a concave-convex matching structure formed on one longitudinal side of the through holes, i.e., the first dampingblock 33 is integrally sleeved on therotating shafts 31. The second dampingpiece 34 has two, is fixed in respectively inpivot 31 is last and along withpivot 31's rotation rotates, second dampingpiece 34 corresponds the unsmooth cooperation structure of first dampingpiece 33 is equipped with corresponding unsmooth cooperation structure, throughspring 32's elastic pressure makes first dampingpiece 33 with the unsmooth cooperation structure of second dampingpiece 34 mutually supports and produces periodic resistance or helping hand, realizes hovering of the different positions of folding in-process of folding screen, produces better user experience effect.

Referring to fig. 4 and 9 to 15, thepitch varying device 40 includes a rotatingbase 41, a drivingrod 46 capable of rotating in therotating hole 124 of thespindle 11, atransmission member 47 disposed in the rotatingbase 41 and driven by the drivingrod 46, a connectingbase 43 capable of moving relative to the rotatingbase 41, and alinkage 44 for driving the connectingbase 43 to move by thetransmission member 47.

As shown in fig. 10 to 12, the rotatingbase 41 includes abase 411, a rotatingportion 412 extending from one lateral side of thebase 411 and fixed to therotating shaft 31, amating portion 415 formed by recessing thebase 411 and extending in a direction away from the rotatingportion 412, and a firstengaging portion 416 formed on a back surface of the base 411 opposite to themating portion 415. Thefitting portion 415 is partially recessed and formed on thehousing 411, and is partially extended from thehousing 411. The engagingportion 415 includes a recessed receivingportion 421, a limitingportion 422 formed by extending upward from two longitudinal sides of the receivingportion 421 and then bending and extending oppositely, engagingflanges 423 formed on two outer edges of the receivingportion 421, a communicatinghole 424 penetrating the receivingportion 421, a first rotating engagingportion 425 penetrating the engagingportion 415 and located at one longitudinal end of the communicatinghole 424, astate control groove 426 opened on one limitingportion 422, and acolumn 427 located on the back of thehousing 411. Thecommunication hole 424 includes anarrow portion 4242 on the side of the first rotation-fitting portion 425 and awide portion 4241 on the side away from the first rotation-fitting portion 425, and thewide portion 4241 has a width larger than that of thenarrow portion 4242. Thestate control slots 426 includedeployment state slots 4261,closure state slots 4262, andisolation protrusions 4263 between thedeployment state slots 4261 and theclosure state slots 4262.

Thedrive rod 46 includes ashaft end 461 rotatable about therotation aperture 124 and adrive end 462 engaging thedrive member 47. Theshaft end 461 comprises a shaft structure extending towards one longitudinal side and sleeved in therotating hole 124, theshaft end 461 is located at the outer side of the abuttingportion 123, a gap exists between theshaft end 461 and the second dampingblock 34, and the second dampingblock 34 does not interfere with the rotation of theshaft end 461. The drivingend 462 includes a post-like structure formed at the end.

Thelinkage rod 44 includes first, second and thirdrotation branch portions 441, 442, 443 arranged in sequence, and the first and thirdrotation branch portions 441, 443 are respectively located at two ends of the secondrotation branch portion 442. The firstrotation support portion 441 is fixed to the firstrotation engagement portion 425 of therotation base 41 by a rivet.

Thetransmission member 47 includes aplate body 471, alatch hole 472 provided in theplate body 471 and having afirst opening 473 on a lateral outer side thereof, a thirdrotation matching portion 474 provided at an end of theplate body 471 away from thelatch hole 472 and riveted to the thirdrotation supporting portion 443 by a rivet, astopper 475 provided on one side of the thirdrotation matching portion 474, and aninstallation cavity 477 provided between thelatch hole 472 and the thirdrotation matching portion 474. The mountingchamber 477 is provided with asecond opening 476 at a longitudinally outer side.

The connectingseat 43 includes amain body 431, afitting groove 432 formed by extending upward from both longitudinal sides of themain body 431 and then bending and extending vertically and oppositely, a fixinghole 433 formed by extending from the longitudinal outer side of thefitting groove 432, arubber sleeve 434 sleeved in thefitting groove 432, atrack groove 435 formed by attaching therubber sleeve 434 in thefitting groove 432, ariveting column 436 arranged on the inner surface of themain body 431, a secondrotation fitting portion 438 arranged at the rear end of the inner surface of themain body 431, and aflat spring 437 with one end fixed on theriveting column 436. The other end of theflat spring 437 is fixed to thecolumn 427 of therotating plate 41, and at least one pair of theflat springs 437 is provided. The secondrotation branch portion 442 of thelinkage lever 44 is fixed to the secondrotation matching portion 438 of the connectingseat 43 by a rivet, and the first, second and thirdrotation branch portions 441, 442 and 443 can rotate around the firstrotation matching portion 425, the secondrotation matching portion 438 and the thirdrotation matching portion 474, respectively.

Theinstallation cavity 477 of thetransmission member 47 is installed with astatus control member 45, and thestatus control member 45 includes abase portion 451 disposed in theinstallation cavity 477, a holdingend 453 extending out of thesecond opening 476 of theinstallation cavity 477 from thebase portion 451, and anelastic member 452 clamped between one end of thebase portion 451 and the inner wall of theinstallation cavity 477. Theelastic member 452 is positioned by a positioning post (not shown) provided on an inner wall of the mountingcavity 477, theelastic member 452 provides an elastic force to thestate control member 45, so that theabutting end 453 maintains an outward supporting force, and theabutting end 453 is switched between theopen state groove 4261 and theclosed state groove 4262 of thestate control groove 426 of theswivel base 41 to realize a positioning function when the open state and the closed state are switched, thereby preventing an excessive opening or closing operation.

When thepitch varying device 40 is assembled, theshaft end 461 of the drivingrod 46 is sleeved in therotating hole 124 on the outer side of the stoppingpart 123; therotating parts 412 at the two longitudinal ends of the rotatingbase 41 are respectively positioned in thegear groove 114, the arc-shapedgroove 126 of thenotch 125 and thegear groove 114, the rotatingshaft 31 is inserted into the hole structure on therotating part 412 and theshaft hole 121 on thethird partition part 119 from one end of thenotch 125 and extends into the damping groove 115, at this time, thespring 32 and the first and second dampingblocks 33, 34 are respectively sleeved outside the rotatingshaft 31, and the second dampingblock 34 abuts against theabutting part 123; the rotatingshaft 31 is continuously pushed to make therotating shaft 31 pass through theshaft hole 121 on thesecond partition part 118 and extend to thegear groove 114, and meanwhile, a pair ofgears 35 and arotating part 412 are sleeved on therotating shaft 31, and the rotating shaft is continuously pushed to be inserted into theshaft hole 121 on thefirst partition part 117.

The rotatingplate 13 includes arotating plate base 131, a widenedportion 132 extending from both longitudinal sides of therotating plate base 131 in a transverse direction,longitudinal end portions 133 formed at both longitudinal ends of therotating plate base 131, and second engagingportions 134 formed on outer side surfaces of thelongitudinal end portions 133 and engaged with the first engagingportions 416. When the rotatingbase 41 is assembled on thespindle 11, the first engagingportion 416 and the secondengaging portion 134 are engaged with each other and can achieve a limit and move relatively when the rotatingbase 41 rotates.

Before the rotatingbase 41 is assembled to themain shaft 11, thepitch changing device 40 needs to be assembled as follows:

the other end of theflat spring 437 fixed to therivet post 436 of the connectingbase 43 is fixed to thepost 427 on the back surface of the rotatingbase 41, and thesecond rotation support 442 of thelink lever 44 is rotatably fixed to the secondrotation engagement portion 438 of the connectingbase 43 or thefirst rotation support 441 is fixed to the firstrotation engagement portion 425 of the rotatingbase 41. Thetrack groove 435 of the connectingseat 43 is sleeved outside the matchingflanges 423 at both sides of the matching portion of therotating seat 41, and thetrack groove 435 is covered with therubber sleeve 434 to enable the two to smoothly slide in a matching manner, thereby avoiding noise.

Fixing thestate control element 45 in theinstallation cavity 477 of thetransmission element 47, then installing thetransmission element 47 in theaccommodating part 421 of therotating seat 41, wherein the limitingparts 422 at two sides of theaccommodating part 421 limit the position of thetransmission element 47 in the longitudinal direction, and theabutting end 453 is elastically matched with thestate control groove 426; at this time, the thirdrotation branch portion 443 of thelink lever 44 is rotatably fixed to the thirdrotation engagement portion 474 of thetransmission member 47. The first, second and thirdrotation branch parts 441, 442 and 443 and the first, second and thirdrotation matching parts 425, 438 and 474 may be combined by a hole and a column structure, or riveted in two hole structures.

The drivingend 462 of the drivingrod 46 is clipped into theclipping hole 472 of the drivingmember 47, and the drivingrod 46 extends out along thefirst opening 473 at one side of theclipping hole 472. The rotatingportion 412 of thegear slot 114 extends along thenotch 1141 of thegear slot 114.

Thepitch varying device 40 further includes acover plate 48, and thecover plate 48 is fixed above theaccommodating portion 421 of the rotatingbase 41 by screws to fix thetransmission member 47 on the rotatingbase 41.

The operation principle of the pitch-changing device of the application is as follows, when the connectingseat 43 is driven by the casing (such as a mobile phone casing) connected with the connecting seat to rotate, the rotatingplate 13 drives thehinge strip 10 to rotate together, the rotatingplate 13 and therotating seat 41 move relatively through the first andsecond occlusion parts 416 and 134, and simultaneously the drivingrod 46 rotates along with the rotating plate, the drivingend 462 of the drivingrod 46 drives thetransmission member 47 to move in theaccommodating part 421 of therotating seat 41, so that the drivingrod 44 on thetransmission member 47 drives the connectingseat 43 to move, and the movement of the connectingseat 43 can enable the casing fixed on the connectingseat 43 to generate the change of the length distance, thereby adapting to the change of the length generated by bending the folding screen.

In this process, theflat spring 437 provides a connection and elastic force between theconnection holder 43 and therotation holder 41. Theflat spring 437 can also provide two states, and the positioning of the two positions of the unfolded state and the folded state can be realized by matching thestate control member 45 with thestate control groove 426 provided on therotary base 41.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (11)

1. A folding display device is characterized by comprising a folding hinge and a variable-pitch device rotationally assembled on the folding hinge, wherein the folding hinge comprises a main shaft inserted with a rotating shaft, a plurality of strip-shaped bodies and a rotating plate, the strip-shaped bodies and the rotating plate are hinged on the two transverse sides of the main shaft, the variable-pitch device comprises a rotating seat rotationally fixed on the rotating shaft, a transmission part assembled on the rotating seat and capable of moving in the transverse direction of the rotating seat, a connecting seat sleeved on the rotating seat and capable of moving in the transverse direction of the rotating seat, a driving rod and a linkage rod rotationally matched with the main shaft and driving the transmission part, the rotating seat and the rotating plate are further provided with a first engaging part and a second engaging part which are mutually slidably matched, and the linkage rod is sequentially provided with a first rotating branch part, a second rotating branch part and a third rotating branch part which are rotationally fixed on the rotating seat, the connecting, the rotary seat is provided with communicating holes corresponding to the positions of the linkage rods, a flat spring is further connected between the connecting seat and the rotary seat, the connecting seat drives the rotary seat, the rotating plate and the driving rod to rotate together when rotating, and the driving rod pushes or pulls the driving part to move along the transverse direction of the rotary seat, so that the linkage rods drive the connecting seat to move in the transverse direction of the rotary seat by means of rotation of the first rotating support part, and accordingly the distance between the connecting seats on two transverse sides of the spindle is changed.

2. The foldable display device of claim 1, wherein the rotating base comprises a base body, a rotating part extending from the base body and rotatably fixed on the main shaft, and a fitting part formed in the base body and extending away from the rotating part; the matching part comprises a part formed on the base body and a part formed by extending outwards from the transverse edge of the base body.

3. The foldable display device according to claim 2, wherein the engaging portion comprises a receiving portion formed by a recess for assembling the driving member, a limiting portion formed by extending upward from two longitudinal sides of the receiving portion and then bending and extending oppositely for limiting the driving member, engaging flanges formed at two longitudinal outer edges of the receiving portion for matching with the connecting base, and a first rotation engaging portion for fixing the first rotation support portion.

4. The foldable display device according to claim 3, wherein the transmission member comprises a plate body portion, a fastening hole provided on the plate body portion and having a first opening at a lateral outer side thereof, and a third rotation engagement portion provided at an end of the plate body portion away from the fastening hole to rotatably fix the third rotation support portion; the driving rod comprises a driving end which is rotatably arranged at the upper shaft end of the main shaft and is buckled in the buckling hole of the transmission piece.

5. The foldable display device of claim 4, wherein the connecting base comprises a main body and matching grooves extending upwards from two longitudinal sides of the main body and then vertically bending and extending oppositely to form matching flanges which are matched with and slide on the matching flanges of the rotating base, wherein housings are respectively fixed on the connecting base at two lateral sides of the main shaft, the housings at two lateral sides of the main shaft rotate through folding operation of a user to drive the connecting base to rotate, a rubber sleeve is attached to the matching grooves, a track groove is formed in the rubber sleeve, and the matching flanges are inserted into the track grooves and can slide.

6. The foldable display device of claim 5, wherein the transmission member further comprises a mounting cavity disposed between the fastening hole and the third rotation engaging portion, a second opening is disposed in the mounting cavity facing the position limiting portion of the rotation base, a state control element is mounted in the mounting cavity, and a state control groove matched with the state control element is disposed in the position limiting portion corresponding to the second opening.

7. The foldable display device of claim 6, wherein the status control member comprises a base portion disposed in the mounting cavity, a holding end portion extending out of the second opening of the mounting cavity from the base portion, and an elastic member clamped between one end of the base portion and an inner wall of the mounting cavity, the status control slot comprises an open status slot and a closed status slot, and the holding end portion respectively holds in the open status slot and the closed status slot in the open and closed statuses.

8. The folding display device of claim 1, wherein the spindle includes a shaft body, and a fixing groove, a gear groove and a damping groove formed at two ends of the shaft body in a recessed manner, the fixing groove and the gear groove form a first partition therebetween, the gear groove and the damping groove form a second partition therebetween, the damping groove forms a third partition outside, the third partition is cut off to form a notch, and a pair of the rotating shafts are inserted into and pass through the damping groove, the gear groove and the partition groove from the notch.

9. The foldable display device as claimed in claim 8, wherein a pair of gears engaged with each other are fixed on the rotating shaft in the gear groove, a spring, a first damping block and a second damping block are sleeved on the rotating shaft in the damping groove, and a fixing device is fixed on the bar-shaped body and the rotating plate at the fixing groove position and the transverse direction position of the main shaft.

10. The folding display apparatus of claim 9, wherein the folding hinges are formed with projections projecting in a direction transverse to the positions of the fixing grooves, respectively; the fixing device comprises a fixed female seat and a fixed male seat, the main shaft, each strip-shaped body and the rotating plate respectively correspond to one fixed female seat or one fixed male seat, the fixed male seat and the fixed female seat are connected with each other and can rotate, the fixed male seat and the fixed female seat are arranged at intervals, the fixed female seat and the fixed male seat respectively comprise a seat base, a lower spacing part arranged at the bottom of the seat base to accommodate the lug, and a screw hole penetrating through the seat base and communicated to the lower spacing part, the fixed female seat further comprises a lower spacing part, an upper spacing part and an arc-shaped groove located between the upper spacing part and the lower spacing part, which are formed by extending from the two longitudinal ends of the seat base, and the fixed male seat further comprises arc-shaped blocks which are formed by extending from the two longitudinal ends of the seat base and are matched with the arc-shaped groove to rotate.

11. A folding handset, characterized in that it comprises a folding display device according to any one of claims 1 to 10.

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