CN114203053A

CN114203053A - Display device

Info

Publication number: CN114203053A
Application number: CN202210064339.2A
Authority: CN
Inventors: 张家豪; 王宗元; 刘君欢; 朱厚坤; 朱红
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-03-18
Anticipated expiration: 2042-01-20
Also published as: CN114203053B

Abstract

The application discloses display device belongs to and shows technical field. The display device may include: flexible display panel, first casing, second casing, reel and spacing subassembly. The winding drum is provided with a first limiting part and a limiting assembly, and the first limiting part can be clamped with a second limiting part in the limiting assembly. When the display device is impacted, the central rod in the limiting assembly can be kept still under the action of inertia because the elastic element is arranged in the limiting assembly. So, in the striking moment, well core rod among the spacing subassembly can be to the inner wall motion that is close to first locating part in the reel for the second locating part and the first locating part joint that cup joint on the core rod, can be in the striking very big slew velocity who slows down the reel in the twinkling of an eye, make the reel and the probability that curly display substrate took place to separate lower, the effectual display substrate that curls that has reduced collides and receives the probability of damage with the second casing, and then the effectual life that has improved display device.

Description

Display device

Technical Field

The application relates to the technical field of display, in particular to a display device.

Background

With the development of display technology, more and more display devices are being equipped with flexible display panels such as folding display screens or sliding display screens. The display device provided with the flexible display panels can realize the switching of the physical size of the display device, and greatly improves the use experience of users.

The display device provided with the sliding and rolling display screen can adjust the display size of the display device in a rolling and sliding mode. For example, the display device equipped with the roll-up display screen may further include: the display device comprises a housing for providing support for the roll-to-roll display screen, and a roller for engaging a portion of the roll-to-roll display screen. Wherein, when the spool rotated, can drive smooth roll display screen rolling or expand, and then can let display device realize the adjustment to showing the size.

However, when the display device equipped with the sliding and rolling display screen is impacted, the sliding and rolling display screen is easily separated from the scroll and collides with the housing, so that the sliding and rolling display screen is easily damaged, and the service life of the display device is short.

Disclosure of Invention

The embodiment of the application provides a display device. The problem that the service life of the display device in the prior art is short can be solved, the technical scheme is as follows:

in one aspect, there is provided a display device including:

a flexible display panel having a flat display substrate and a curled display substrate;

a first housing for supporting the flat display substrate;

a second housing slidably coupled to the first housing;

the two ends of the winding drum are connected with the second shell, the curled display substrate is attached to the outer wall of the winding drum after bypassing the winding drum, and the inner wall of the winding drum is provided with a first limiting piece;

and, be located spacing subassembly in the reel, the both ends of spacing subassembly all with the second casing is connected, spacing subassembly includes: the elastic element is connected with the end part of the central rod, and the second limiting piece is sleeved on the central rod;

wherein the spacing assembly is configured to: after the second shell body is impacted, the elastic element drives the central rod to move towards the inner wall of the winding drum, so that the first limiting part is connected with the second limiting part in a clamping mode.

Optionally, the first retaining member includes a plurality of protrusions distributed around a circumferential array in the drum, and the second retaining member includes a plurality of claws distributed around an axial center line of the central rod;

the end part of the clamping jaw departing from the central rod is located between two adjacent bulges, and is connected with the first limiting part in a clamping mode through the second limiting part when the clamping jaw abuts against the bulges.

Optionally, the reel is configured to: when the second shell slides in the direction departing from the first shell, the second shell rotates around the first direction to drive the curled display substrate to unfold;

when the end part of the clamping jaw deviates from the central rod is located between the first bulge and the second bulge, the end part of the clamping jaw deviates from the central rod and is abutted to the second bulge, the first bulge and the second bulge are any two adjacent bulges in the bulges, and the first bulge and the second bulge are distributed around the first direction.

Optionally, the protrusion is a ratchet tooth, and the tooth profile of the ratchet tooth is any one of an asymmetric triangle, an asymmetric arc and an asymmetric trapezoid.

Optionally, the number of the elastic elements is two, first ends of the two elastic elements are respectively connected with two ends of the central rod, and second ends of the two elastic elements are connected with the second shell.

Optionally, the limiting assembly further comprises: the first ends of the two connecting rods are respectively connected with the second ends of the two elastic elements, and the second ends of the two connecting rods are connected with the second shell.

Optionally, the elastic element is an extension spring.

Optionally, the display device further includes: and the tensioning assembly is connected with the first shell and is connected with one side of the curled display substrate, which deviates from the plane display substrate.

Optionally, the tensioning assembly comprises: a guide shaft and a tension belt;

one end of the tensioning belt is fixedly connected with one side of the curled display substrate, the other end of the tensioning belt is wound around the guide shaft and then fixedly connected with the first shell.

Optionally, the display device further includes: the driving motor is fixed on the first shell, and the transmission assembly is respectively connected with the driving motor and the second shell;

wherein the drive motor is configured to: the transmission assembly drives the second shell to slide towards a direction departing from the first shell, or slide towards a direction close to the first shell.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

a display device, comprising: flexible display panel, first casing, second casing, reel and spacing subassembly. The winding drum is provided with a first limiting part and a limiting assembly, and the first limiting part can be clamped with a second limiting part in the limiting assembly. When the display device is impacted, the second shell can move towards the direction of the first shell, and the central rod in the limiting assembly can be kept still under the action of inertia due to the elastic element arranged in the limiting assembly. So, in the striking moment, well core rod among the spacing subassembly can be to the inner wall motion that is close to first locating part in the reel for the second locating part and the first locating part joint that cup joint on the core rod, can be in the striking very big slew velocity who slows down the reel in the twinkling of an eye, make the reel and the probability that curly display substrate took place to separate lower, the effectual display substrate that curls that has reduced collides and receives the probability of damage with the second casing, and then the effectual life that has improved display device.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of a display device provided in the related art;

FIG. 2 is a schematic cross-sectional view at A-A' shown in FIG. 1;

fig. 3 is a schematic view of a display device provided in the related art when being hit;

fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;

FIG. 5 is a schematic cross-sectional view of a spool and stop assembly provided in accordance with an embodiment of the present application;

FIG. 6 is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure showing a roll in response to an impact;

FIG. 7 is a schematic cross-sectional view at B-B' shown in FIG. 6;

fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present disclosure, in which a rolled display substrate is unrolled;

fig. 9 is a schematic structural diagram of a rolled display substrate of a display device according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a winding drum and a second limiting member according to an embodiment of the present disclosure;

FIG. 11 is a schematic cross-sectional view of another spool and stop assembly provided in accordance with an embodiment of the present application;

fig. 12 is a schematic structural diagram of another display device provided in an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In the related art, please refer to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a display device provided in the related art, and fig. 2 is a schematic cross-sectional diagram at a-a' shown in fig. 1. The display device 00 includes: the display screen comprises a sliding and rolling display screen 01, a first shell 02, a second shell 03 and a reel 04.

The sliding and rolling display screen 01 is a flexible display panel, and the plane part of the sliding and rolling display screen 01 is fixedly connected with the first shell 02. The first housing 02 may provide a supporting force to the flat portion of the roll display 01.

The second housing 03 and the first housing 02 are slidably connected. By applying a force to the second housing 03, sliding between the first housing 02 and the second housing 03 occurs.

Both ends of spool 04 all are connected with second casing 03 to second casing 03 can drive spool 04 and take place to rotate. The outer wall of the reel 04 may be attached to the curled portion of the sliding-rolling display panel 01, and the curled portion of the sliding-rolling display panel 01 may apply a certain pressing force to the reel 04. Therefore, when the reel 04 rotates, the sliding-rolling display screen 01 can be driven to roll or unwind.

In this way, when the display device 00 needs to unfold the roll-sliding display screen 01, the user can apply a leftward acting force F1 to the second housing 03, the second housing 03 slides in a direction away from the first housing 02, and the roll shaft 04 is driven to rotate clockwise under the attaching action of the curled portion of the roll-sliding display screen 01, so that the curled portion of the roll-sliding display screen 01 can be unfolded, and the area of the display surface of the roll-sliding display screen 01 displayed in the display device 00 is increased. When the display device 00 needs to roll the roll-sliding display screen 01, a user can apply an acting force opposite to the acting force F1 to the second housing 03, the second housing 03 slides in a direction close to the first housing 02, and under the attaching effect of the curled portion of the roll-sliding display screen 01, the reel 04 is driven to rotate in the counterclockwise direction, so that the curled portion of the roll-sliding display screen 01 can be rolled, and the area of the display surface of the roll-sliding display screen 01 displayed in the display device 00 is reduced.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating a display device provided in the related art when being impacted. When the display device 00 is subjected to the impact force F2, the winding shaft 04 is driven to rotate counterclockwise by the engaging action of the curled portion of the sliding-winding display screen 01, and the winding shaft 04 rotates at a higher speed after being subjected to the impact force F2. However, the pressing force applied to the winding shaft 04 by the winding portion of the display screen 01 is limited, and when the winding shaft 04 rotates in the counterclockwise direction at a high speed, the winding shaft 04 contracts the winding portion of the display screen 01 at a low speed, so that the winding portion of the display screen 01 may be separated from the winding shaft 04. As such, a portion of the rolled portion of the sliding display panel 01, which is separated from the winding shaft 04, may collide with the second housing 03, so that the sliding display panel 01 is easily damaged, and the service life of the display device 00 is reduced.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. The display device 000 may include: the flexible display panel 100, the first housing 200, the second housing 300, the roll 400, and the spacing assembly 500.

The flexible display panel 100 has a flat display substrate 101 and a rolled display substrate 102. The flat display substrate 101 cannot be curled, and the curled display substrate 102 can be rolled in the display device 000. Here, when the display device 000 is in the rolled state, display can be performed only by the flat display substrate 101; when the display device 000 is in the expanded state, display can be performed not only by the flat display substrate 101 but also by the display substrate 102 being rolled.

The first housing 200 is used to support the flat display substrate 101. Here, the first housing 100 and the flat display substrate 101 are fixedly connected.

The second housing 300 is slidably coupled to the first housing 200, and by applying a force to the second housing 300, relative sliding between the first housing 200 and the second housing 300 can be generated.

Both ends of the winding drum 400 are connected to the second housing 300, the inner wall of the winding drum 400 has a first stopper 401, and the curled display substrate 102 is attached to the outer wall of the winding drum 400 after bypassing the winding drum 400. Thus, when the second housing 300 receives an acting force, the winding drum 400 can be driven to rotate under the attaching action of the curled display substrate 102, so that the curled display substrate 102 can be wound or unwound. Fig. 4 is a schematic structural view of the display device 000 after the rolled display substrate 102 is partially unrolled.

The position-limiting assembly 500 may be located inside the winding drum 400, and in order to clearly see the structure of the position-limiting assembly 500 inside the winding drum 400, please refer to fig. 5, in which fig. 5 is a schematic cross-sectional view of a winding drum and a position-limiting assembly according to an embodiment of the present invention. Both ends of spacing subassembly 500 all are connected with second casing 300, and spacing subassembly 500 includes: the elastic member comprises a central rod 501, an elastic element 502 connected with the end of the central rod 501, and a second retaining member 503 sleeved on the central rod 501.

Wherein, the spacing assembly 500 is configured to: after the second housing 300 receives the impact force, the elastic element 502 drives the central rod 501 to move toward the inner wall of the winding drum 400, so that the first limiting member 401 is clamped with the second limiting member 503.

In the embodiment of the present application, please refer to fig. 6 and 7, fig. 6 is a schematic cross-sectional view of a spool when a display device provided by the embodiment of the present application is impacted, and fig. 7 is a schematic cross-sectional view at B-B' shown in fig. 6. When the display device 000 is impacted, the second housing 300 is impacted by the impact force, and the second housing 300 moves toward the first housing 200. At this time, since the elastic element 502 is disposed in the spacing assembly 500, the central rod 501 in the spacing assembly 500 is kept still by inertia. Thus, at the moment of impact, the central rod 501 in the limiting assembly 500 moves towards the inner wall of the winding drum 400, so that the second limiting member 503 sleeved on the central rod 501 is engaged with the first limiting member 401. Therefore, the second limiting part 503 and the first limiting part 401 are clamped to act, so that the rotating speed of the winding drum 400 can be greatly reduced at the moment of impact, the probability of separation of the winding drum 400 and the curled display substrate 102 is low, the probability of damage caused by collision of the curled display substrate 102 and the second shell 300 is effectively reduced, and the service life of the display device 000 is effectively prolonged.

In summary, the display device provided in the embodiment of the present application includes: flexible display panel, first casing, second casing, reel and spacing subassembly. The winding drum is provided with a first limiting part and a limiting assembly, and the first limiting part can be clamped with a second limiting part in the limiting assembly. When the display device is impacted, the second shell can move towards the direction of the first shell, and the central rod in the limiting assembly can be kept still under the action of inertia due to the elastic element arranged in the limiting assembly. So, in the striking moment, well core rod among the spacing subassembly can be to the inner wall motion that is close to first locating part in the reel for the second locating part and the first locating part joint that cup joint on the core rod, can be in the striking very big slew velocity who slows down the reel in the twinkling of an eye, make the reel and the probability that curly display substrate took place to separate lower, the effectual display substrate that curls that has reduced collides and receives the probability of damage with the second casing, and then the effectual life that has improved display device.

It should be noted that, at the moment that the display device 000 is impacted, the elastic element can move the center rod close to the inner wall of the winding drum, so that the first limiting member 401 is clamped with the second limiting member 503, and the rotation speed of the winding drum 400 can be greatly reduced. After the display device 000 is hit, the elastic element 502 may rebound to return to the initial state to drive the central rod 501 to return to the initial position (i.e., the central axis of the central rod 501 is overlapped with the axial axis of the roller), so that the first limiting member 401 and the second limiting member 503 are released from the engagement relationship. Thus, the first casing 200 and the second casing 300 can still slide normally after the display device 000 is impacted without manually releasing the clamping relationship between the first limiting member 401 and the second limiting member 503, so that the curled display substrate 102 can still be rolled or unfolded normally.

In this application, please refer to fig. 8 and 9, fig. 8 is a schematic structural diagram of a rolled display substrate of a display device according to an embodiment of the present application, and fig. 9 is a schematic structural diagram of a rolled display substrate of a display device according to an embodiment of the present application. The display device 000 further includes: and the tensioning assembly 600, wherein the tensioning assembly 600 is connected with the first shell 200 and is connected with the side of the curled display substrate 102, which faces away from the flat display substrate 101. Here, the tension assembly 600 may allow the rolled display substrate 102 to apply a certain pressing force to the roll 400, so that the rolled display substrate 102 may be wound or unwound by the cooperation of the tension assembly 600 and the roll 400.

In the embodiment of the present application, the tension assembly 600 may include: a guide shaft 601 and a tension band 602.

The guide shaft 601 is fixed within the display device 000 and is slidable within the display device 000.

One end of the tension belt 602 is fixedly connected to a side of the curled display substrate 102 away from the flat display substrate 101, and the other end of the tension belt 602 is fixedly connected to the first housing 200 after bypassing the guide shaft 601. As an example, one end of the tension band 602 is bonded to the side of the rolled display substrate 102 facing away from the flat display substrate 101 through a pressure sensitive adhesive, and the tension band 602 is bonded to only a portion of the side of the rolled display substrate 102 facing away from the flat display substrate 101, so that the tension assembly 600 can be ensured to roll or unwind the rolled display substrate 102. The other end of the tension band 602 is fixedly connected to the first housing 200 by a snap screw.

In this case, the guide shaft 601 in the tension assembly 600 can move within the display device 000. Therefore, when the side of the rolled display substrate 102 facing away from the flat display substrate 101 is fixed to the tension belt 602, and the other end of the tension belt 602 is fixed to the first housing 200 by bypassing the guide shaft 601, the tension belt 602 will always tension the rolled display substrate 102, so that the rolled display substrate 102 will always apply a pressing force to the winding drum 400.

Thus, as shown in fig. 8, when the second housing 300 slides away from the first housing 200, the second housing 300 can drive the guiding shaft 601 to move toward the winding drum 400 through the winding drum 400, the winding display substrate 102 and the tension belt 602, so that the winding display substrate 102 between the guiding shaft 601 and the winding drum 400 can be transferred between the winding drum 400 and the first housing 200 by the rotating winding drum 400, and the winding display substrate 102 in the display device 000 can be unwound.

As shown in fig. 9, when the second housing 300 slides to a direction approaching the first housing 200, the second housing 300 may drive the guiding shaft 601 to move away from the winding drum 400 through the winding drum 400, the winding display substrate 102 and the tension belt 602, so that the winding display substrate 102 between the winding drum 400 and the first housing 200 may be transferred between the guiding shaft 601 and the winding drum 400 by the rotating winding drum 400, and the winding display substrate 102 in the display device 000 may be wound.

It should be noted that the movement principle of the tension assembly 600 is similar to that of a pulley. For example, the guide shaft 601 in the tension assembly 600 is equivalent to a movable pulley in a pulley block, and the guide shaft 601 and the tension belt 602 in the tension assembly 600 are equivalent to a connecting rope for connecting the movable pulley in the pulley block.

Optionally, the tension band 602 may be made of Polyimide (PI), and the tension band 602 may also be made of other flexible materials in other possible implementations, which is not limited in this application.

In the embodiment of the present application, as shown in fig. 7, the first retaining member 401 includes a plurality of protrusions 401a distributed around the circumferential array in the drum 400, and the second retaining member 503 includes a plurality of claws 503a distributed around the axial center line of the central rod 501. When not impacted, there is a gap between the plurality of claws 503a in the second stopper 503 and the plurality of protrusions 401a in the first stopper 401.

When the end of the claw 503a departing from the central rod 501 is located between two adjacent protrusions 401a and abuts against the protrusions 401a, the first limiting member 401 is clamped with the second limiting member 503.

In the embodiment of the present application, when the display device 000 is impacted, at the moment of the impact, the central rod 501 in the limiting assembly 500 moves toward the inner wall of the winding drum 400, so that the claws 503a of the second limiting members 503 sleeved on the central rod 501 move close to the protrusions 401a in the winding drum 400, and further, part of the claws 503a away from the end of the central rod 501 is located between two adjacent protrusions 401a in the winding drum 400. In this case, a part of the latch 503a facing away from the end of the central rod 501 may abut against the protrusion 401a to allow the first stopper 401 to engage with the second stopper 503, thereby allowing the rotation speed of the spool 400 to be rapidly reduced at the moment of impact.

It should be noted that after the partial latch 503a away from the end of the central rod 501 can completely abut against the protrusion 401a, the rotation speed of the winding drum 400 is reduced to zero, and the winding drum 400 stops rotating. In this manner, the protection of the rolled display substrate 102 in the display device 000 by the spacing assembly 500 is completed.

In the present application, the protrusion 401a of the first limiting member 401 is a ratchet tooth, and the tooth profile of the ratchet tooth is any one of an asymmetrical triangle, an asymmetrical circular arc, and an asymmetrical trapezoid. Here, the shape of the claw 503a may also be an asymmetric shape that is the same as the shape of the protrusion 401 a. The distance between the part of the claw 503a facing away from the end of the central rod 501 and the two protrusions 401a of the first stopper 401 is smaller than or equal to the distance between the part of the claw 503a facing away from the end of the central rod 501 and one of the two protrusions 401 a.

The plurality of protrusions 401a of the first stopper 401 may be integrated with the drum 400 or may be separately assembled, which is not limited in the present application.

In the embodiment of the present application, please refer to fig. 10, and fig. 10 is a schematic structural diagram of a reel and a second limiting member provided in the embodiment of the present application. The roll 400 in the display device 000 is configured to: when the second housing 300 slides away from the first housing 200, the second housing rotates around the first direction R1 to drive the display substrate 102 to be unfolded; when the second housing 300 slides in a direction approaching the first housing 200, it rotates around the second direction R2 to wind the display substrate 102. In this application, the first direction R1 may be a clockwise direction, the second direction R2 may be a counterclockwise direction, and in other possible implementations, the first direction R1 may be a counterclockwise direction, and the second direction R2 may be a clockwise direction.

When the end of the claw 503a facing away from the central rod 501 is located between the first protrusion 4011 and the second protrusion 4012, the end of the claw 503a facing away from the central rod 501 abuts against the second protrusion 4012, the first protrusion 4011 and the second protrusion 4012 are any two adjacent protrusions 401a in the plurality of protrusions 401a, and the first protrusion 4011 and the second protrusion 4012 are distributed around the first direction R1. Here, when the first direction R1 is opposite to the second direction R2, the end of the pawl 503a facing away from the central rod 501 can abut against one of any two adjacent protrusions 401 a.

In the embodiment of the present application, when the display device 000 is impacted, the roll core 400 still rotates around the second direction R2 under the attaching action of the curled display substrate 102, and the central rod 501 moves towards the inner wall of the roll core 400, so that the claw 503a of the second stopper 503 is away from the end of the central rod 501 and located between the adjacent first protrusion 4011 and second protrusion 4012 in the roll core 400. In order to ensure that the end of the latch 503a facing away from the central rod 501 can abut against the first limiting member 401, thereby greatly slowing the rotation speed of the drum 400. It is necessary to ensure that the first 4011 and the second 4012 of the first stop 401 are distributed around the first direction R1, and that the first direction R1 is opposite to the second direction R2, so that the end of the catch 503a facing away from the central rod 501 can abut against the second 4012.

In the present application, there are various structures of the limiting assembly 500, and the embodiment of the present application is schematically illustrated by taking the following two alternative implementations as examples:

a first alternative implementation is shown in fig. 5. The number of the elastic elements 502 is two, first ends of the two elastic elements 502 are respectively connected with two ends of the center rod 501, and second ends of the two elastic elements 502 are both connected with the second housing 300. Here, the center rod 501 is located at the center of the roll 400, and the first end of the elastic element 502 is connected to the center rod 501, so the elastic element 502 is also located at the center of the roll 400.

In this case, no matter which direction the display device 000 is subjected to, the two elastic elements 502 can drive the central rod 501 to move towards the inner wall of the winding drum 400 close to the first limiting member 401 from each direction, and the end of the claw 503a of the second limiting member 503 sleeved on the central rod 501, which deviates from the central rod 501, can be abutted against the protrusion 401a, so that the first limiting member 401 is ensured to be clamped with the second limiting member 503. That is, no matter which direction the display device 000 falls from, the display device 000 can trigger the arrangement of the first stopper 401 and the second stopper 503 provided in the embodiment of the present application to be locked, so as to protect the rolled display substrate 102. Here, one elastic element 502 is disposed at each end of the center rod 501, and the two elastic elements 502 are spaced from the second limiting member 503 by the same distance. Thus, the first end of the elastic element 502 can drive the central rod 501 to move towards the inner wall of the winding drum 400 close to the first limiting member 401 in the same direction, and the distance between the elastic element 502 on the two sides of the second limiting member 503 and the central rod 501 is the same, so that the second limiting member 503 and the first limiting member 401 are better in clamping effect.

Referring to fig. 11, fig. 11 is a schematic cross-sectional view of another reel and a limiting assembly according to an embodiment of the present disclosure. The spacing assembly 500 further comprises: two connecting rods 504, first ends of the two connecting rods 504 are respectively connected with second ends of the two elastic elements 502, and second ends of the two connecting rods 504 are both connected with the second housing 300. Here, the connecting rod 504 and the center rod 501 are both located at the center of the roll 400, and the elastic member 502 is also located at the center of the roll 400.

In this case, no matter which direction the display device 000 is subjected to, the two elastic elements 502 can drive the central rod 501 to move towards the inner wall of the winding drum 400 close to the first limiting member 401 from each direction, and the end of the claw 503a of the second limiting member 503 sleeved on the central rod 501, which deviates from the central rod 501, can be abutted against the protrusion 401a, so that the first limiting member 401 is ensured to be clamped with the second limiting member 503. That is, no matter which direction the display device 000 falls from, the display device 000 can trigger the arrangement of the first stopper 401 and the second stopper 503 provided in the embodiment of the present application to be locked, so as to protect the rolled display substrate 102. Here, two connecting rods 504 are distributed on both sides of the second limiting member 503, and the distance between the two connecting rods 504 is the same as the distance between the second ends of the elastic members 502. Thus, the first end of the elastic element 502 can drive the central rod 501 to move towards the inner wall of the winding drum 400 close to the first limiting member 401 in the same direction, and the distance between the two elastic elements 502 connected to the first ends of the two connecting rods 504 that drive the central rod 501 to move is the same, so that the second limiting member 503 and the first limiting member 401 are better in clamping effect.

It should be noted that, on the premise of ensuring that the clamping effect of the second limiting member 503 and the first limiting member 401 is good, the number and the positions of the connecting rods 504 and the elastic elements 502 may be combined in various ways. For example, the two connecting rods 504 can be divided, and an elastic member 502 is disposed at the divided position of the connecting rod 504. Thus, the position limiting assembly 500 may further include: four elastic elements 502, four connecting rods 504. This is not limited in this application.

For both of the above alternative implementations, the resilient element 502 in the spacing assembly 500 is an extension spring. In order to ensure that the limiting assembly 500 does not deviate from the center of the winding drum 400 during the use of the display device 000, the second limiting member 503 deviates from the center of the winding drum 400, and the clamping effect between the second limiting member 503 and the first limiting member 401 is poor, and the stiffness coefficient of the spring needs to be restricted to a certain extent.

In the embodiment of the present application, the stiffness coefficient of the spring may be defined according to a relationship between the magnitude of the tensile force and the stiffness coefficient of the spring. Here, the relationship between the tensile force and the stiffness coefficient of the elastic member 502 can be represented by the formula: f₄₀₂₂Kx, (k: stiffness, x: elongation) was obtained. For example, if the size of the display device 000 is determined, the size of the roll 400 may also be determined, so the elongation is a fixed value. Then, according to the formula of the momentum conservation principle, the pulling force of the elastic element 502 can be represented by the formula: f₄₀₂₂t ═ mv, (t: time, m: mass, v: velocity) was obtained. Thus, F can be obtained according to the landing time of the display device 000, the quality of the display device 000 and the landing speed of the display device 000₄₀₂₂In turn, the stiffness coefficient of the resilient element 502.

In this application, please refer to fig. 12, where fig. 12 is a schematic structural diagram of another display device provided in an embodiment of the present application. The display device 000 may further include: the driving motor 700 is fixed on the first housing 200, and the transmission assembly 800 is connected with the driving motor 700 and the second housing 300 respectively. Here, the transmission assembly 800 may be a structure capable of transmitting power by various pulleys and pulleys, so that the driving motor 700 may slide the second housing 300 with respect to the first housing 200 through the transmission assembly 800. For example, the transmission assembly 800 is a rack and pinion transmission mechanism, and may also be a lead screw nut transmission mechanism, which is not limited in this embodiment of the present application.

Wherein the driving motor 700 is configured to: the transmission assembly 800 drives the second housing 300 to slide away from the first housing 200 or to slide close to the first housing 200.

In the embodiment of the present application, when the driving motor 700 drives the second housing 300 to slide away from the first housing 200 through the transmission assembly 800, the second housing 300 drives the guiding shaft 601 to slide toward the winding drum 400, so that the winding drum 400 rotates around the first direction R1 under the attaching effect of the rolled display substrate 102, so that the rolled display substrate 102 in the display device 000 is unfolded; when the driving motor 700 drives the second housing 300 to slide toward the direction close to the first housing 200 through the transmission assembly 800, the second housing 300 drives the guide shaft 601 to slide toward the direction away from the winding drum 400, so that the winding drum 400 rotates around the second direction R2 under the attaching effect of the curled display substrate 102, so that the curled display substrate 102 in the display device 000 is wound.

It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.

In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.

Claims

1. A display device, comprising:

a first housing for supporting the flat display substrate;

a second housing slidably coupled to the first housing;

2. The display device of claim 1, wherein the first retaining member comprises a plurality of protrusions distributed in a circumferential array within the drum, and the second retaining member comprises a plurality of detents distributed about an axial center line of the central rod;

3. The display device of claim 2, wherein the reel is configured to: when the second shell slides in the direction departing from the first shell, the second shell rotates around the first direction to drive the curled display substrate to unfold;

4. The display device according to claim 3, wherein the protrusion is a ratchet tooth having a tooth shape of any one of an asymmetrical triangle, an asymmetrical circular arc, and an asymmetrical trapezoid.

5. The display device according to claim 1, wherein the number of the elastic elements is two, and first ends of the two elastic elements are respectively connected to two ends of the center rod, and second ends of the two elastic elements are both connected to the second housing.

6. The display device of claim 5, wherein the spacing assembly further comprises: the first ends of the two connecting rods are respectively connected with the second ends of the two elastic elements, and the second ends of the two connecting rods are connected with the second shell.

7. A display device as claimed in claim 5 or 6, characterised in that the elastic element is a tension spring.

8. The display device according to any one of claims 1 to 6, characterized in that the display device further comprises: and the tensioning assembly is connected with the first shell and is connected with one side of the curled display substrate, which deviates from the plane display substrate.

9. The display device of claim 8, wherein the tension assembly comprises: a guide shaft and a tension belt;

10. The display device according to any one of claims 1 to 6, characterized in that the display device further comprises: the driving motor is fixed on the first shell, and the transmission assembly is respectively connected with the driving motor and the second shell;