CN110675746B

CN110675746B - Folding display device and folding mobile phone

Info

Publication number: CN110675746B
Application number: CN201910789479.4A
Authority: CN
Inventors: 董杰; 刘建军; 孙小梨
Original assignee: Shenzhen Everwin Precision Technology Co Ltd
Current assignee: Shenzhen Everwin Precision Technology Co Ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2021-07-02
Anticipated expiration: 2039-08-26
Also published as: CN110675746A

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 synchronizing mechanism 30 assembled on the foldable hinge, and a distance varying device 40 hinged on the foldable hinge.

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

The hinge strip 10 comprises a main shaft 11 positioned in the middle, at least one strip-shaped body 12 respectively hinged on two sides of the main shaft 11, and a rotating plate 13 hinged on the outer side of the strip-shaped body 12.

The spindle 11 includes a shaft body 111, a fixing groove 112, a gear groove 114, a damping groove 115, a first partition 117 between the fixing groove 112 and the gear groove 114, a second partition 118 between the gear groove 114 and the damping groove 115, and a third partition 119 outside the damping groove 115, wherein the fixing groove 112, the gear groove 114, and the damping groove 115 are recessed in this order.

The inner side surface of the fixing groove 112 of the main shaft 11, the inner side surfaces of the bar-shaped body 1 and the rotating plate 13 are in the same horizontal plane, the hinge strips 10 are respectively provided with a convex block 101 in a protruding manner in the transverse direction of the position of the fixing groove 112, and the convex blocks 101 are provided with screw holes 102. The spindle 11, the bar 12 and the lug 101 on the rotating plate 13 are in the same straight line in the transverse direction.

Referring to fig. 2 and 16, the free end of the main shaft 11 protrudes outward to form a hinge portion 127, hinge grooves 128 are formed on both lateral sides of the hinge portion 127, hinge protrusions 129 and hinge grooves 135 hinged in the hinge grooves 128 are respectively formed on both lateral sides of the free end of the bar-shaped body 12 of the main shaft 11, and hinge protrusions hinged in the hinge grooves 135 of the bar-shaped body 12 are formed on the free end of the rotating plate 13. The

hinge grooves

128, 135 are movably hinged to the hinge protrusion 129 by bolts (not numbered). Two strip bodies 12 and a rotating plate 13 are respectively hinged on two sides of the main shaft 11 in sequence. The design of the hinge structure at the free end of the hinge strip 10 is described in detail in the patent application CN201920305522.0, and will not be described in detail here.

The fixing device 20 includes a fixed female seat 21 and a fixed male seat 22 rotating in cooperation with the fixed female seat 21. Each of the female and male fixed

seats

21, 22 includes a seat base 211, a lower clearance portion 212 opened at the bottom of the seat base 211 for accommodating the bump 101, an upper clearance portion 213 opened at the top of the seat base 211, and a screw hole 214 penetrating the seat base 211 and communicating the upper and

lower clearance portions

212, 213. The lower limit portion 215, the upper limit portion 216 and the arc-shaped groove 217 between the upper limit portion 215 and the lower limit portion 216 are respectively formed at two longitudinal ends of the seat base 211 of the female fixed seat 21 in an extending manner, and the upper limit portion 215 and the lower limit portion 216 at the two longitudinal ends of the female fixed seat 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 fixed seat 21 are opposite and are arranged in a point symmetry manner. The fixed male seat 22 further comprises arc-shaped blocks 219 formed by extending from the two longitudinal ends of the seat 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 the fixed male seat 22 extend along opposite directions in the transverse direction and are arranged in point symmetry. The arcuate segments 219 snap into the arcuate slots 217 and are rotatable within the arcuate slots 217.

The female fixing seat 21 and the male fixing seat 22 of the fixing device 20 are screwed on the protrusion 101 of the hinge strip 10 by a bolt or a screw (not shown), the protrusion 101 is fitted into the lower avoiding portion 212, the bolt passes through the screw hole 214 and is locked in the screw hole 102 of the protrusion 101, and a nut portion of the bolt is accommodated in the upper avoiding portion 213. A fixed female seat 21 is arranged on the convex block 101 of the main shaft 11, a fixed male seat 22 matched with the fixed female seat 21 is arranged on the strip-shaped body 12 close to the main shaft 11, and by analogy, a fixed female seat 21 or a fixed male seat 22 is fixed on the rotating plate 13 positioned at the outermost side, but the fixed female seat 21 or the fixed male seat 22 fixed on the rotating plate 13 only needs to be provided with an arc-shaped groove 217 or an arc-shaped block 219 at one longitudinal end of the seat base 211.

Referring to fig. 4 and 8, after the fixing groove 112 of the spindle 11 is concavely formed, a connection portion 113 is formed at the bottom of the fixing groove 112, and an inner surface of the connection portion 113 is located on the same horizontal plane as that of the bar-shaped body 12 and the rotating plate 13 in the unfolded state. The thickness of the connecting portion 113 is small, the force required to be carried by the spindle 11 is large, and the strength of the connecting portion 113 is not enough to support, so that a fixing hole 120 is provided at a position corresponding to the shaft body 111 at both sides of the fixing groove 112 and the first partition 117, a reinforcing rod 15 is inserted above the fixing groove 112, both ends of the reinforcing rod 15 are fixed in the fixing hole 120, and the reinforcing rod 15 is located above the fixing device 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 will main shaft 11, the bar 12 and change the fixed fixing device 20 of board 13, fixing device 20 realizes right through the mutual rotation of fixed female seat 21 and fixed public seat 22 main shaft 11, the bar 12 and change the roughness of board 13 intermediate position department, avoid folding hinge's main shaft 11, the bar 12 and change the unable relative position that keeps of board 13 and produce unsmooth problem.

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

A pair of shaft holes 121 arranged transversely are respectively arranged in the transverse direction on the first and

second partition parts

117, 118 at the longitudinal two ends of the gear groove 114 of the main shaft 11, the transverse two sides of the gear groove 114 are provided with protection parts 122 for coating the transverse side surfaces of the gear groove 114, and the transverse two sides of the gear groove 114 close to the first partition part 117 are provided with notches 1141 for connecting the variable pitch device 40.

The pair of shafts 31 are respectively sleeved in the pair of shaft holes 121, the pair of gears 35 are fixed on the pair of shafts 31 and located in the gear grooves 114, and the pair of gears 35 are engaged with each other. When the pair of rotating shafts 31 are driven by the pitch varying device 40 to rotate, the gears move along with the relative movement of the rotating shafts 31, so that the synchronization of the rotating amplitudes of the pair of rotating 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.

A notch 125 is formed by cutting the folded inner side surface of the free end of the main shaft 11 in the longitudinal direction, and the third partition 119 penetrates a part of the shaft hole 121 at a position corresponding to the third partition 121, that is, the shaft hole 121 penetrates the third partition 119 and the second partition 118 in the longitudinal direction, and the first partition 117 is not penetrated. The pair of shaft holes 121 are respectively aligned on the same line. The second partition portion 118 is located on one side of the damping groove 115 and protrudes to form a resisting portion 123, at least a part of the shaft hole 121 is located on and penetrates through the resisting portion 123, and the second partition portion 118 is located on one side of the damping groove 115 and located on the outer edge of the resisting portion 123 and provided with a rotating hole 124. The notch 125 has a pair of arc grooves 126 formed below the shaft hole 121. The stopping portion 123 may also be formed to extend longitudinally from the third partition 119 at one side of the damping groove 115.

The damping groove 115 is provided with a spring 32 sleeved outside the rotating shaft 31, a first damping block 33 sleeved outside the rotating shaft 31, and a second damping block 34 fixed on the rotating shaft 31 and matched with the first damping block 33. The spring 32 is clamped between the third partition 119 and the first damping block 33, and the rear end of the second damping block 34 abuts against the abutting portion 123. The first damping block 33 includes a main body portion (not shown), through holes (not shown) formed on two lateral sides of the main body portion for the two rotating shafts 31 to pass through, and a concave-convex matching structure formed on one longitudinal side of the through holes, i.e., the first damping block 33 is integrally sleeved on the rotating shafts 31. The second damping piece 34 has two, is fixed in respectively in pivot 31 is last and along with pivot 31's rotation rotates, second damping piece 34 corresponds the unsmooth cooperation structure of first damping piece 33 is equipped with corresponding unsmooth cooperation structure, through spring 32's elastic pressure makes first damping piece 33 with the unsmooth cooperation structure of second damping piece 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, the pitch varying device 40 includes a rotating base 41, a driving rod 46 capable of rotating in the rotating hole 124 of the spindle 11, a transmission member 47 disposed in the rotating base 41 and driven by the driving rod 46, a connecting base 43 capable of moving relative to the rotating base 41, and a linkage 44 for driving the connecting base 43 to move by the transmission member 47.

As shown in fig. 10 to 12, the rotating base 41 includes a base 411, a rotating portion 412 extending from one lateral side of the base 411 and fixed to the rotating shaft 31, a mating portion 415 formed by recessing the base 411 and extending in a direction away from the rotating portion 412, and a first engaging portion 416 formed on a back surface of the base 411 opposite to the mating portion 415. The fitting portion 415 is partially recessed and formed on the housing 411, and is partially extended from the housing 411. The engaging portion 415 includes a recessed receiving portion 421, a limiting portion 422 formed by extending upward from two longitudinal sides of the receiving portion 421 and then bending and extending oppositely, engaging flanges 423 formed on two outer edges of the receiving portion 421, a communicating hole 424 penetrating the receiving portion 421, a first rotating engaging portion 425 penetrating the engaging portion 415 and located at one longitudinal end of the communicating hole 424, a state control groove 426 opened on one limiting portion 422, and a column 427 located on the back of the housing 411. The communication hole 424 includes a narrow portion 4242 on the side of the first rotation-fitting portion 425 and a wide portion 4241 on the side away from the first rotation-fitting portion 425, and the wide portion 4241 has a width larger than that of the narrow portion 4242. The state control slots 426 include deployment state slots 4261, closure state slots 4262, and isolation protrusions 4263 between the deployment state slots 4261 and the closure state slots 4262.

The drive rod 46 includes a shaft end 461 rotatable about the rotation aperture 124 and a drive end 462 engaging the drive member 47. The shaft end 461 comprises a shaft structure extending towards one longitudinal side and sleeved in the rotating hole 124, the shaft end 461 is located at the outer side of the abutting portion 123, a gap exists between the shaft end 461 and the second damping block 34, and the second damping block 34 does not interfere with the rotation of the shaft end 461. The driving end 462 includes a post-like structure formed at the end.

The linkage rod 44 includes first, second and third

rotation branch portions

441, 442, 443 arranged in sequence, and the first and third

rotation branch portions

441, 443 are respectively located at two ends of the second rotation branch portion 442. The first rotation support portion 441 is fixed to the first rotation engagement portion 425 of the rotation base 41 by a rivet.

The transmission member 47 includes a plate body 471, a latch hole 472 provided in the plate body 471 and having a first opening 473 on a lateral outer side thereof, a third rotation matching portion 474 provided at an end of the plate body 471 away from the latch hole 472 and riveted to the third rotation supporting portion 443 by a rivet, a stopper 475 provided on one side of the third rotation matching portion 474, and an installation cavity 477 provided between the latch hole 472 and the third rotation matching portion 474. The mounting chamber 477 is provided with a second opening 476 at a longitudinally outer side.

The connecting seat 43 includes a main body 431, a fitting groove 432 formed by extending upward from both longitudinal sides of the main body 431 and then bending and extending vertically and oppositely, a fixing hole 433 formed by extending from the longitudinal outer side of the fitting groove 432, a rubber sleeve 434 sleeved in the fitting groove 432, a track groove 435 formed by attaching the rubber sleeve 434 in the fitting groove 432, a riveting column 436 arranged on the inner surface of the main body 431, a second rotation fitting portion 438 arranged at the rear end of the inner surface of the main body 431, and a flat spring 437 with one end fixed on the riveting column 436. The other end of the flat spring 437 is fixed to the column 427 of the rotating plate 41, and at least one pair of the flat springs 437 is provided. The second rotation branch portion 442 of the linkage lever 44 is fixed to the second rotation matching portion 438 of the connecting seat 43 by a rivet, and the first, second and third

rotation branch portions

441, 442 and 443 can rotate around the first rotation matching portion 425, the second rotation matching portion 438 and the third rotation matching portion 474, respectively.

The installation cavity 477 of the transmission member 47 is installed with a status control member 45, and the status control member 45 includes a base portion 451 disposed in the installation cavity 477, a holding end 453 extending out of the second opening 476 of the installation cavity 477 from the base portion 451, and an elastic member 452 clamped between one end of the base portion 451 and the inner wall of the installation cavity 477. The elastic member 452 is positioned by a positioning post (not shown) provided on an inner wall of the mounting cavity 477, the elastic member 452 provides an elastic force to the state control member 45, so that the abutting end 453 maintains an outward supporting force, and the abutting end 453 is switched between the open state groove 4261 and the closed state groove 4262 of the state control groove 426 of the swivel 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 the pitch varying device 40 is assembled, the shaft end 461 of the driving rod 46 is sleeved in the rotating hole 124 on the outer side of the stopping part 123; the rotating parts 412 at the two longitudinal ends of the rotating base 41 are respectively positioned in the gear groove 114, the arc-shaped groove 126 of the notch 125 and the gear groove 114, the rotating shaft 31 is inserted into the hole structure on the rotating part 412 and the shaft hole 121 on the third partition part 119 from one end of the notch 125 and extends into the damping groove 115, at this time, the spring 32 and the first and second damping

blocks

33, 34 are respectively sleeved outside the rotating shaft 31, and the second damping block 34 abuts against the abutting part 123; the rotating shaft 31 is continuously pushed to make the rotating shaft 31 pass through the shaft hole 121 on the second partition part 118 and extend to the gear groove 114, and meanwhile, a pair of gears 35 and a rotating part 412 are sleeved on the rotating shaft 31, and the rotating shaft is continuously pushed to be inserted into the shaft hole 121 on the first partition part 117.

The rotating plate 13 includes a rotating plate base 131, a widened portion 132 extending from both longitudinal sides of the rotating plate base 131 in a transverse direction, longitudinal end portions 133 formed at both longitudinal ends of the rotating plate base 131, and second engaging portions 134 formed on outer side surfaces of the longitudinal end portions 133 and engaged with the first engaging portions 416. When the rotating base 41 is assembled on the spindle 11, the first engaging portion 416 and the second engaging portion 134 are engaged with each other and can achieve a limit and move relatively when the rotating base 41 rotates.

Before the rotating base 41 is assembled to the main shaft 11, the pitch changing device 40 needs to be assembled as follows:

the other end of the flat spring 437 fixed to the rivet post 436 of the connecting base 43 is fixed to the post 427 on the back surface of the rotating base 41, and the second rotation support 442 of the link lever 44 is rotatably fixed to the second rotation engagement portion 438 of the connecting base 43 or the first rotation support 441 is fixed to the first rotation engagement portion 425 of the rotating base 41. The track groove 435 of the connecting seat 43 is sleeved outside the matching flanges 423 at both sides of the matching portion of the rotating seat 41, and the track groove 435 is covered with the rubber sleeve 434 to enable the two to smoothly slide in a matching manner, thereby avoiding noise.

Fixing the state control element 45 in the installation cavity 477 of the transmission element 47, then installing the transmission element 47 in the accommodating part 421 of the rotating seat 41, wherein the limiting parts 422 at two sides of the accommodating part 421 limit the position of the transmission element 47 in the longitudinal direction, and the abutting end 453 is elastically matched with the state control groove 426; at this time, the third rotation branch portion 443 of the link lever 44 is rotatably fixed to the third rotation engagement portion 474 of the transmission member 47. The first, second and third

rotation branch parts

441, 442 and 443 and the first, second and third

rotation matching parts

425, 438 and 474 may be combined by a hole and a column structure, or riveted in two hole structures.

The driving end 462 of the driving rod 46 is clipped into the clipping hole 472 of the driving member 47, and the driving rod 46 extends out along the first opening 473 at one side of the clipping hole 472. The rotating portion 412 of the gear slot 114 extends along the notch 1141 of the gear slot 114.

The pitch varying device 40 further includes a cover plate 48, and the cover plate 48 is fixed above the accommodating portion 421 of the rotating base 41 by screws to fix the transmission member 47 on the rotating base 41.

The operation principle of the pitch-changing device of the application is as follows, when the connecting seat 43 is driven by the casing (such as a mobile phone casing) connected with the connecting seat to rotate, the rotating plate 13 drives the hinge strip 10 to rotate together, the rotating plate 13 and the rotating seat 41 move relatively through the first and

second occlusion parts

416 and 134, and simultaneously the driving rod 46 rotates along with the rotating plate, the driving end 462 of the driving rod 46 drives the transmission member 47 to move in the accommodating part 421 of the rotating seat 41, so that the driving rod 44 on the transmission member 47 drives the connecting seat 43 to move, and the movement of the connecting seat 43 can enable the casing fixed on the connecting seat 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, the flat spring 437 provides a connection and elastic force between the connection holder 43 and the rotation holder 41. The flat 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 the state control member 45 with the state control groove 426 provided on the rotary 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

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.