WO2021167437A1

WO2021167437A1 - Hinge structure for in-folding type flexible display device

Info

Publication number: WO2021167437A1
Application number: PCT/KR2021/002272
Authority: WO
Inventors: 박현민; 이성준
Original assignee: (주)에이유플렉스
Priority date: 2020-02-23
Filing date: 2021-02-23
Publication date: 2021-08-26

Abstract

The present invention relates to a hinge structure for an in-folding type flexible display device, in which, a hinge, installed in an in-folding type display device having a display panel installed on an inner folded surface in the display device of which the center is folded, comprises, in the central part thereof, a folding panel part composed of a pair of auxiliary panels and a pair of connection panels such that when an in-folding type foldable smartphone is folded, more space is secured between the pair of folded auxiliary panels than the pair of folded connection panels and thus, the display panel is folded in a rounded manner rather than in a flat manner.

Description

Hinge structure for in-folding type flexible display device

The present invention relates to a hinge structure for an in-folding-type flexible display device, and more specifically, as a hinge installed in an in-folding-type display device in which a display panel is installed on an inner surface folded in a display device in which the center is folded, A folding panel part composed of a pair of auxiliary panels and a connection panel is configured in the center, so that a wider space is secured between a pair of folded auxiliary panels than a pair of folded connection panels when an in-folding type foldable smartphone is folded. It relates to a hinge structure for an in-folding type flexible display device that allows a display panel to be folded roundly without being flat.

The mobile terminal may be configured to perform various functions. Examples of such various functions include data and voice communication functions, a function to take a picture or video through a camera, a voice storage function, a function to play music files through a speaker system, and a function to display images or videos.

Some mobile terminals include an additional function capable of running a game, and some mobile terminals are implemented as multimedia devices. Furthermore, recent mobile terminals can receive a broadcast or multicast signal to view a video or television program.

Efforts to support and increase the functions of current mobile terminals in addition to the above functions are continuing. The above-mentioned efforts include addition and improvement of software or hardware as well as change and improvement of structural components forming the mobile terminal.

In general, in a mobile terminal, a display module displays information processed in the mobile terminal. For example, when the mobile terminal is in a call mode, a user interface (UI) or graphic user interface (GUI) related to a call is displayed.

In addition, when the mobile terminal is in a video call mode or a photographing mode, a photographed and/or received image or UI or GUI is displayed. The display module includes a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, and a 3D display. ), and so on.

Among them, a flexible display (or flexible LCD) is currently being studied in earnest due to the advantage of being able to change its shape at will. However, it seems that it will be a long time before we can carry a completely paper-like display like a scroll, as shown in current science fiction films.

Therefore, a transitional form will be used a lot until the development of the flexible display proceeds and the use is activated in earnest, and this form will not be much different from the current terminal structure. In addition, when a flexible display currently being developed is used in a mobile terminal, there is a need to describe its use form and its protection method.

Patent documents similar to the hinge structure for a mobile communication device in which the flexible display panel according to the present invention is installed include Publication No. 10-2015-0096827, (title of the invention hinge device and foldable display device having the same).

According to the present invention, in a mobile communication terminal in which a flexible display panel is installed on two upper panels connected to each other so that they can be folded, a stable folding operation can be performed with respect to the folding unit while a pair of panels are folded or unfolded, and , A flexible display panel that is configured to support the pair of unfolded panel parts so that they do not rotate more than 180 degrees when the panel part is fully unfolded 180 degrees to prevent damage to the flexible display panel installed on the surface of the pair of upper panels is installed An object of the present invention is to provide a hinge structure for an in-folding type flexible display device.

In addition, a sufficient gap is formed between a pair of auxiliary panels in a folded state in which the in-folding type hinge structure on which the flexible display panel is installed is formed to prevent strong stress from being generated in the folded portion of the flexible display panel.

In order to achieve the above object, the hinge structure for an in-folding type flexible display device according to the present invention,

a folding part base body 40 having a tilt rotation part 70 and an elastic actuator 60 installed therein;

a folding panel part 50 connected to the tilt rotation part 70 and the elastic actuator 60 installed on the folding part base body 40;

each upper panel 10 connected to each connection panel 54 of the folding panel unit 50, respectively; Each of the upper panel 10 is coupled to the case 14, the lower surface of the case 14 is configured to be covered by the case cover (18),

The folding part base body 40 is provided with an elastic actuator 60 including a gear bar 62 and a tilt rotation part 70 including a first rotation part 72 and a second rotation part 74,

The folding panel part 50 is composed of a pair of auxiliary panels 52 and each connection panel 54 coupled to each upper panel 10 of the present invention,

The auxiliary panel 52 and the connection panel 54 are connected by a gear module 90,

In the gear module 90, one

fixed gear

92, 94 is installed on each of the auxiliary panel 52 and the connection panel 54, and one rotation gear 96 is installed between the fixed gears 92 and 94. ) is composed of each of the

fixed gears

92 and 94 and gear engagement,

A sliding guide 98 is installed on the connection panel 54,

The gear bar 62 is fitted to the sliding guide 98 and is configured to slide along the sliding guide 98 when the gear bar 62 rotates,

When the folding panel part 50 installed on the folding part base body 40 is folded, it is combined with the second rotation part 74 of the tilt rotation part 70 and the folding of a pair of auxiliary panels 52 stops,

The pair of gear bars 62 are rotated while sliding while being inserted into the sliding guide 98 installed on the rear surface of the connection panel 52,

Each of the auxiliary panels 52 and each of the connecting panels 54 connected by the gear module 90 are folded to have a narrower interval than the folded interval of the pair of auxiliary panels 52,

A dust prevention groove 78 is formed in the upper side edge of the second rotating part 74, and a dust prevention rod 79 protruding from the body 76 is disposed in close contact with the dust prevention groove 78, It is characterized in that the second rotation part (74) prevents dust from entering through the dust prevention groove (78) when rotating in the first rotation part (72).

The hinge structure for an in-folding type flexible display device according to the present invention installs a folding panel part that is folded and unfolded consisting of a pair of auxiliary panels and a connection panel on a base body located in the center, and consists of a pair of auxiliary panels and a connection panel. In the folded state, the gap between the pair of folded auxiliary panels positioned at the bottom is wider than the pair of folded connection panels, so that the folded part in the folded state of the flexible display panel is located between the folded auxiliary panels with wide spacing There is a remarkable effect of preventing the folded portion of the flexible display panel from being damaged.

1 is a perspective view showing an unfolded state of the hinge structure for an in-folding type flexible display device according to the present invention.

2 is a perspective view showing a folded state of the hinge structure for an in-folding type flexible display device according to the present invention.

3 is a perspective view illustrating a hinge structure for an in-folding type flexible display device according to the present invention, which is further folded than in FIG. 2 .

4 is a perspective view illustrating a fully folded state of the hinge structure for an in-folding type flexible display device according to the present invention.

5 is an exploded perspective view illustrating an exploded hinge structure for an in-folding type flexible display device according to the present invention.

6 is a perspective view illustrating a folding part base body and an elastic driving part installed on the folding part base body in the hinge structure for an in-folding type flexible display device according to the present invention.

7 is an exploded perspective view showing a state in which the folding part base body is disassembled in the hinge structure for an in-folding type flexible display device according to the present invention.

8 is a perspective view showing an exploded state and an assembled state of the elastic driving part of the first embodiment separated from the folding part base body according to the present invention.

9 is a perspective view showing a second embodiment of the elastic driving part according to the present invention.

10 is a perspective view showing a third embodiment of the elastic driving part according to the present invention.

11 is a perspective view showing a fourth embodiment of the elastic driving part according to the present invention.

12 is a perspective view showing a fifth embodiment of the elastic driving part according to the present invention.

13 is a perspective view illustrating a state in which a gear bar is removed from FIG. 6 in order to explain a tilt rotation part in a hinge structure for an in-folding type flexible display device according to the present invention.

14 is an exploded perspective view showing the disassembled tilt rotation unit installed on the folding unit base body according to the present invention.

15 is a perspective view illustrating a state in which a tilt rotation unit is installed on a folding unit base body according to the present invention.

16 is a perspective view illustrating a state in which the tilt rotation unit installed on the folding unit base body according to the present invention is tilted by about 1/2.

17 is a perspective view showing a state in which all the tilt rotation parts installed on the folding part base body according to the present invention are rotated and tilted.

18 is a perspective view illustrating the rear surface of the folding panel part connected to the elastic driving part of the folding part base body according to the present invention.

19 is an exploded perspective view showing a partially disassembled gear module connecting the auxiliary panel and the connecting panel of the folding panel according to the present invention.

FIG. 20 is a perspective view showing states in which the folding panel part is installed on the folding part base body according to the present invention.

21 is a perspective view showing a state in which a panel for connection is installed to slide on a gear bar of an elastic actuator installed on a base body of a folding part according to the present invention, and an auxiliary panel is installed in the tilt rotation part.

22 is a perspective view showing a state in which the folding panel part is installed on the folding part base body according to the present invention.

23 is a perspective view illustrating a state in which the folding panel part is installed on the folding part base body according to the present invention as viewed from below.

24 is a perspective view showing a state in which the folding panel part installed on the folding part base body according to the present invention is folded.

25 is a perspective view showing a state in which the folding panel part installed on the folding part base body according to the present invention is folded following FIG. 24 .

26 is a perspective view showing a state in which the folding panel part installed on the folding part base body according to the present invention is fully folded.

27 is a perspective view of the folding panel part installed on the folding part base body according to the present invention, viewed from a different angle;

28 is a view showing each part of the folding panel part installed on the folding part base body according to the present invention.

FIG. 29 is a cross-sectional view illustrating a section in which part A is cut in FIG. 29 .

FIG. 30 is a perspective view illustrating a cross-section of part B in FIG. 29 .

FIG. 31 is a cross-sectional view illustrating a cross-section of a portion B in FIG. 29 .

FIG. 32 is a cross-sectional view illustrating a cross-section at which part C is cut in FIG. 29 .

FIG. 33 is a cross-sectional view illustrating a cross-section of a portion D in FIG. 29 .

34 is a cross-sectional view illustrating a modified example of a hinge structure for an in-folding type flexible display device according to the present invention as viewed from the side.

35 is a perspective view illustrating a state in which a movement guide for guiding movement of an auxiliary panel and a connection panel of the present invention is installed in the hinge structure for an in-folding type flexible display device according to the present invention.

36 is a perspective view illustrating a state in which a movement guide for guiding movement of an auxiliary panel and a connection panel according to the present invention is separated.

37 is a perspective view showing the state of the movement guide according to the present invention.

38 is a perspective view showing a state in which the first body and the second body of the movement guide according to the present invention are separated.

FIG. 39 is a perspective view showing a state in which the first body and the second body of the movement guide according to the present invention are separated, as viewed from the opposite direction to FIG. 38 .

**Explanation of the symbols of the main parts of the drawing**

6: flexible display panel 10: upper panel

40: folding part base 52: auxiliary panel

54: connection panel 60: elastic actuator

62: gear bar 69: magnet

70: tilt rotation part

72: first rotating part 74: second rotating part

78: dust prevention groove 79: dust prevention zone

80: dust barrier 92, 94: fixed gear

96: rotary gear 98: sliding guide

1 is a perspective view showing an unfolded state of the hinge structure for an in-folding type flexible display device according to the present invention. 2 is a perspective view showing a folded state of the hinge structure for an in-folding type flexible display device according to the present invention. 3 is a perspective view illustrating a hinge structure for an in-folding type flexible display device according to the present invention, which is further folded than in FIG. 2 . 4 is a perspective view illustrating a fully folded state of the hinge structure for an in-folding type flexible display device according to the present invention.

1 to 4, in the hinge structure for an in-folding type flexible display device according to the present invention, the folding panel part 50 is installed in the center, and the upper panel 10 is the folding panel part 50 on the left and right, respectively. ) is combined with

On the upper panel 10 and the folding panel part 50 of the present invention, a flexible display panel 6 on which a moving image or the like is displayed is configured to be installed.

As described above, the hinge structure according to the present invention is of an infolding type in which the flexible display panel 6 is disposed inside the folded upper panel 10 while a pair of the upper panel 10 and the folding panel part 50 are folded. Applies to display devices.

Referring to FIG. 5 , the hinge structure for an in-folding type flexible display device according to the present invention includes a folding part base body 40 in which a tilt rotation part 70 and an elastic actuator 60 (see FIG. 6 ) of the present invention are installed. ), the folding panel part 50 connected to the tilt rotation part 70 and the elastic actuator 60 installed in the folding part base body 40 of the present invention, and each connection panel of the folding panel part 50 of the present invention Each upper panel 10 connected to the 54, each upper panel 10 of the present invention is coupled to the case 14, and the lower surface of the case 14 of the present invention is on the case cover 18. made to be covered by

6 is a perspective view illustrating a folding part base body and an elastic driving part installed on the folding part base body in the hinge structure for an in-folding type flexible display device according to the present invention. 7 is an exploded perspective view showing a state in which the folding part base body is disassembled in the hinge structure for an in-folding type flexible display device according to the present invention.

6 and 7, the folding unit base body 40 according to the present invention includes an elastic actuator 60 including a gear bar 62, a first rotating unit 72, and a second rotating unit 74. A tilt rotation unit 70 is provided.

Two elastic actuators 60 are installed in the folding part base body 40 of the present invention, and two tilt rotation parts 70 are installed in each elastic actuator 60, and the folding part base body ( 40) at the center of the separate tilt rotation unit 70 is installed.

Referring to FIG. 8 , the elastic actuator 60 according to the present invention is coupled to the actuator body 64 like the shaft 65 and rotates at the same time as the rotating cam 66 and the rotating cam 66 rotate. It is configured to include a moving cam 67 moving in a direction away from the rotation cam 66, and the moving cam 67 of the present invention is installed in contact with the coil spring 68 and is attached to the coil spring 68 of the present invention. It is configured to receive an elastic force by

In the front portion of the shaft 65 of the present invention, gears 63 are installed to be toothed with each other, and each gear 63 is geared with the teeth of each gear bar 62 .

A total of two magnets 69 are installed on the upper surface of the actuator body 64 of the present invention, one each, and the auxiliary panel 52 made of a metal material of the folding panel unit 50 according to the present invention is the one of the present invention. It is configured to be coupled to the magnet 69 by magnetic force.

9, according to the second embodiment of the elastic driving part according to the present invention, the configuration of the rotation cam 66 of the first embodiment is omitted, and the shape of the rotation cam 66 of the first embodiment is a gear ( 163) is formed on the rear side of the gear 163 has the same configuration as the rotation cam.

When the gear 163 of the present invention rotates, the moving cam 67 is pushed back and is configured to receive an elastic force by the coil spring 68 at the same time.

Referring to FIG. 10 , in the third embodiment of the elastic driving part according to the present invention, the shaft 165 of the present invention is cut in the longitudinal direction. That is, the shape cut perpendicular to the longitudinal direction of the shaft of the present invention does not have a shape of a circle having the same distance from the center of the circle to the circumference, but a shape in which a portion of the circumference is cut in a straight line.

When the pair of shafts 165 of the present invention are positioned as in (a) and rotate to become (b), the left and right sides of the spring 168 are stretched outward in the direction indicated by the arrow from the center, and the elastic force acts. .

A central shaft 166 is configured to be positioned between the pair of shafts 165 of the present invention.

Referring to FIG. 11 , according to the fourth embodiment of the elastic driving part according to the present invention, the support part 267 formed by insert injection is installed instead of the central shaft 166 of the third embodiment.

When the pair of shafts 165 of the present invention are positioned as in (a) and rotate to become (b), the left and right sides of the spring 168 are stretched outwardly as indicated by arrows in the left and right directions from the center, respectively, so that the elastic force acts. do.

Referring to FIG. 12 , according to the fifth embodiment of the elastic driving part according to the present invention, a rotation cam is formed on the rear portion of the gear 163 , and a rotation cam is also formed on the rear portion of the teeth of the gear bar 62 . It has a configuration in which a total of four rotation cams are formed.

Each of the four shafts 265 of the present invention is connected to the two gears 163 and the rotation cams of the rear teeth of the gear bar 62 are fitted. One shaft 265 is inserted into each opening of the moving cam 167 having four openings according to the present invention, and a coil spring 68 is disposed at the rear of the moving cam 167 of the present invention.

When the gear bar 62 and the gear 163 of the present invention rotate, the moving cam 167 is pushed back and is configured to compress the coil spring 68.

13 is a perspective view illustrating a state in which a gear bar is removed from FIG. 6 in order to explain a tilt rotation part in a hinge structure for an in-folding type flexible display device according to the present invention. 14 is an exploded perspective view showing the disassembled tilt rotation unit installed on the folding unit base body according to the present invention.

Referring to FIGS. 13 and 14 , five tilt rotation units 70 are installed in the folding unit base body 40 of the present invention.

The tilt rotation part 70 of the present invention includes a body 76, a first rotation part 72 connected to the body 76 of the present invention and rotating around the connected part of the body 76, and a first rotation part of the present invention ( It is connected to 72) and consists of a second rotating part (74) which rotates along the first rotating part (72).

A dust prevention groove 78 is formed in the upper side edge of the second rotating part 74 of the present invention, and a dust prevention rod 79 formed to protrude from the body 76 of the present invention is installed in the dust prevention groove 78. It is disposed in close contact and serves to prevent dust from entering through the dust prevention groove 78 when the second rotating part 74 of the present invention rotates in the first rotating part 72 .

The dust prevention groove 78 and the dust prevention zone 79 of the present invention also serve to control the trajectory in which the second rotating part 74 of the present invention rotates.

15 is a perspective view illustrating a state in which a tilt rotation unit is installed on a folding unit base body according to the present invention. 16 is a perspective view illustrating a state in which the tilt rotation unit installed on the folding unit base body according to the present invention is tilted by about 1/2. 17 is a perspective view showing a state in which all the tilt rotation parts installed on the folding part base body according to the present invention are rotated and tilted.

15 to 17 , the tilt rotation part 70 of the present invention is connected to the first rotation part 72 and rotates by being connected to the body 76 of the present invention and connected to the first rotation part 72 of the present invention. It is composed of a second rotation part 74 which rotates along a first rotation part 72 .

The second rotation part 74 of the tilt rotation part 70 according to the present invention is combined with the auxiliary panel 52 of the folding panel part 50 of the present invention, and the folding panel part 50 of the present invention is unfolded or folded. When you do an action, you move together.

Between the tilt rotation part 70 located in the center of the folding part base body 40 of the present invention and the other tilt rotation part 70 adjacent thereto, a dust prevention wall 80 for preventing dust from penetrating into the interior is installed.

In addition, a dust prevention groove 78 is formed in the upper side edge of the second rotation part 74 constituting the tilt rotation part 70 of the present invention, so that the track on which the second rotation part 74 of the present invention moves is prevented from dust It is controlled by the groove 78 and the dust barrier 79 and at the same time prevents the external dust from penetrating into the folding part base body 40 between the dust barrier wall 80 .

18 is a perspective view illustrating the rear surface of the folding panel part connected to the elastic driving part of the folding part base body according to the present invention. 19 is an exploded perspective view showing a partially disassembled gear module connecting the auxiliary panel and the connecting panel of the folding panel according to the present invention.

18 and 19, the folding panel part 50 according to the present invention is composed of a pair of auxiliary panels 52 and each connection panel 54 coupled to each upper panel 10 of the present invention. do.

The auxiliary panel 52 and the connecting panel 54 of the present invention are connected by a gear module 90 .

In the gear module 90 of the present invention, fixed gears 92 and 94 are installed in each of the auxiliary panel 52 and the connection panel 54 of the present invention, and between the fixed gears 92 and 94 of the present invention. One rotary gear 96 is constituted by gear engagement with each of the fixed gears 92 and 94 of the present invention.

A sliding guide 98 is installed on the connecting panel 54 of the present invention. The sliding guide 98 of the present invention is configured to slide along the sliding guide 98 of the present invention when the gear bar 62 of the present invention is fitted and the gear bar 62 of the present invention rotates.

Referring to FIG. 20 , the sliding guide 92 fitted with the gear bar 62 of the present invention is configured to be coupled to the rear surface of the connecting panel 54 of the present invention.

Referring to FIG. 21 , the auxiliary panel 52 of the present invention located on the left side is configured to be coupled to the second rotation unit 74 of the five tilt rotation units 70 located on the left side.

22 is a perspective view showing a state in which the folding panel part is installed on the folding part base body according to the present invention. 23 is a perspective view illustrating a state in which the folding panel part is installed on the folding part base body according to the present invention as viewed from below.

22 and 23 , the second rotation part 74 of the tilt rotation part 70 installed on the folding part base 40 of the present invention is combined with the auxiliary panel 52 of the present invention.

The gear bar 62 of the elastic actuator 60 of the present invention is inserted into the sliding guide 98 installed on the rear surface of the connecting panel 54 of the present invention to slide.

The rear surfaces of the auxiliary panel 52 and the connection panel 54 of the present invention are configured to be connected to each other by the gear module 90 of the present invention.

24 is a perspective view showing a state in which the folding panel part installed on the folding part base body according to the present invention is folded. 25 is a perspective view showing a state in which the folding panel part installed on the folding part base body according to the present invention is folded following FIG. 24 . 26 is a perspective view showing a state in which the folding panel part installed on the folding part base body according to the present invention is fully folded.

24 to 26, the folding panel part 50 installed on the folding part base body 40 according to the present invention is folded while being combined with the second rotation part 74 of the tilt rotation part 70 of the present invention and folded. The folding of the pair of auxiliary panels 52 is stopped.

Then, a pair of gear bars 62 of the present invention are inserted into the sliding guide 98 installed on the rear surface of the connection panel 52 and rotate while sliding, and each auxiliary panel 52 and the gear module 90 of the present invention. Each of the connecting panels 54 connected to each other is configured to be folded so as to have a narrower interval than the folded interval of a pair of auxiliary panels 52 .

27 is a perspective view of the folding panel part installed on the folding part base body according to the present invention, viewed from a different angle; 28 is a view showing each part of the folding panel part installed on the folding part base body according to the present invention.

27 and 28, a pair of auxiliary panels 52 according to the present invention are folded so that a pair of folded connection panels 54 of the present invention are folded inward more than a pair of folded auxiliary panels 52. Even after stopping the operation, the fixed gear 94 fixed to the connection panel 54 of the present invention continues to rotate in a gear-engaged state with the rotary gear 96, so that it is folded further inward than the pair of auxiliary panels 52. is composed

Each connection panel 54 of the present invention is coupled to a pair of upper panels 10, respectively, and each upper panel 10 is coupled to each case 14 to constitute the flexible display device of the present invention. .

When the user of the present invention folds the pair of upper panels 10 combined with the case 14 according to the present invention, the pair of connecting panels 54 combined with the upper panel 10 is more than the pair of auxiliary panels 52 Since they are folded closer to each other inward, the gap between the folded pair of connecting panels 54 is narrower than that of the folded pair of auxiliary panels 52 .

FIG. 29 is a cross-sectional view illustrating a section in which part A is cut in FIG. 28 .

Referring to FIG. 29 , the flexible display panel 6 of the present invention is disposed on the auxiliary panel 52 and the connection panel 54 of the folding panel unit 50 .

The first rotation part 72 of the tilt rotation part 70 of the present invention is connected to the lower end of the body 76 and rotates, and the second rotation part 64 having a round shape is in the round groove of the first rotation part 72. It is configured to rotate while sliding along the first rotating part 72 of the present invention in the fitted state.

Since the dust prevention band 79 is fitted in the dust prevention groove 78 of the second rotation part 74 of the present invention, the rotation range and trajectory of the second rotation part 74 of the present invention are limited while rotating is composed to

The dust prevention groove 78 and the dust prevention bar 79 of the second rotating part 74 of the present invention is a stopper that prevents the folding panel part 50 of the present invention from being folded in the opposite direction when it is fully unfolded. also plays a role

FIG. 30 is a perspective view illustrating a cross-section of a portion B in FIG. 28 . FIG. 31 is a cross-sectional view illustrating a cross-section of a portion B in FIG. 28 .

30 and 31 , the gear bar 62 according to the present invention slides attached to the connecting panel 54 of the present invention while the folding panel part 50 of the present invention is folded or unfolded. It is fitted to the guide 98 and is configured to slide.

FIG. 32 is a cross-sectional view illustrating a cross-section taken along a portion C of FIG. 28 .

Referring to FIG. 32 , when the auxiliary panel 52 and the connecting panel 54 according to the present invention are completely folded, the gap between the folded pair of connecting panels 54 is greater than the distance between the folded pair of auxiliary panels 52 . made more narrow.

This is that the length of the support 194 of the fixed gear 94 of the gear module 90 coupled to the connecting panel 54 of the present invention is greater than the support 192 of the fixed gear 92 coupled to the auxiliary panel 52. It is configured to be long, and when the folding panel part 50 of the present invention is completely folded, the gap between the folded pair of connecting panels 54 is narrower than the gap between the folded pair of auxiliary panels 52 .

FIG. 33 is a cross-sectional view illustrating a cross-section at which part D is cut in FIG. 28 .

Referring to FIG. 33 , the first rotating part 72 of the present invention is connected to the body 76 coupled to the base body 40 to be in a rotatable state.

The side surface of the first rotating part 72 of the present invention has a round configuration. The second rotating part 74 of the present invention has a round groove formed on the side thereof, and the round side of the first rotating part 72 of the present invention is inserted into the round shaped groove of the second rotating part 74 to rotate. do.

The second rotating part 74 of the present invention is configured to have a cylindrical shape, and a flat surface is configured to engage the auxiliary panel 52 of the present invention.

When the pair of second rotation parts 74 of the present invention are fully unfolded, the first rotation part 72 also serves as a stopper preventing movement in the opposite direction when the pair of second rotation parts 74 are fully unfolded.

The sectional views shown in (b) and (c) of FIG. 34 are structural views showing a modified example of the sectional view of (a).

The number of gears of the fixed gears 92 and 94 of the gear module 90 of the present invention, the length of the fixed gear supports 192 and 194, or the number of gears of the rotary gear 96 of the present invention are adjusted. It is possible to change the shape and angle in which the auxiliary panel 52 is finally folded.

35 is a perspective view illustrating a state in which a movement guide for guiding movement of an auxiliary panel and a connection panel of the present invention is installed in the hinge structure for an in-folding type flexible display device according to the present invention. 36 is a perspective view illustrating a state in which a movement guide for guiding movement of an auxiliary panel and a connection panel according to the present invention is separated. 37 is a perspective view showing the state of the movement guide according to the present invention. 38 is a perspective view showing a state in which the first body and the second body of the movement guide according to the present invention are separated. FIG. 39 is a perspective view showing a state in which the first body and the second body of the movement guide according to the present invention are separated, as viewed from the opposite direction to FIG. 38 .

35 to 39, a movement guide for guiding the movement of the connecting panel 54 and the auxiliary panel 52 of the present invention while the hinge structure for an in-folding type flexible display device according to the present invention is folded or unfolded is installed

The movement guide of the present invention is composed of a first body 110 in which a groove 112 is formed and a second body 120 in which a protrusion 122 is installed.

The first body 110 of the present invention is attached to the connection panel 54, the second body 120 of the present invention is attached to the auxiliary panel 52, and the protrusion 122 of the second body 120 is fitted into the groove 112 of the first body 110, and the projection 122 of the present invention is fitted into the groove 112 to control the movement.

Therefore, the movement of the auxiliary panel 52 and the connecting panel 54 of the present invention is also limited so that the protrusion 122 of the second body 120 of the present invention moves in the groove 112 of the first body 110. is composed

The distance at which the protrusion 122 of the second body 120 of the present invention can move in the groove 112 of the first body 110 is modified by changing the length, width, thickness, etc. of the protrusion 122 and the groove 112 . Adjustable.

Although the preferred embodiment of the present invention has been described using specific terms in the above, such description is for illustrative purposes only, and it is obvious that various changes and changes can be made without departing from the spirit and scope of the following claims. it's a thing Such modified embodiments should not be understood separately from the spirit and scope of the present invention, but should fall within the scope of the claims appended hereto.

Claims

a folding part base body 40 having a tilt rotation part 70 and an elastic actuator 60 installed therein;

a folding panel part 50 connected to the tilt rotation part 70 and the elastic actuator 60 installed on the folding part base body 40;

each upper panel 10 connected to each connection panel 54 of the folding panel unit 50, respectively;

Each of the upper panels (10) is coupled to the case (14), and the lower surface of the case (14) is a hinge structure for an infolding type flexible display device, characterized in that it is configured to be covered by a case cover (18) .
The method of claim 1,

The folding part base body 40 is provided with an elastic actuator 60 including a gear bar 62 and a tilt rotation part 70 including a first rotation part 72 and a second rotation part 74. A hinge structure for an in-folding type flexible display device.
The method of claim 1,

The folding panel part 50 is composed of a pair of auxiliary panels 52 and each connection panel 54 coupled to each upper panel 10 of the present invention,

The auxiliary panel 52 and the connection panel 54 are connected by a gear module 90,

In the gear module 90, one fixed gear 92, 94 is installed on each of the auxiliary panel 52 and the connection panel 54, and one rotation gear 96 is installed between the fixed gears 92 and 94. ) is composed of each of the fixed gears 92 and 94 and gear engagement,

A sliding guide 98 is installed on the connection panel 54,

The sliding guide 98 is fitted with the gear bar 62 and is configured to slide along the sliding guide 98 when the gear bar 62 rotates. for hinge structure.
The method of claim 1,

When the folding panel part 50 installed on the folding part base body 40 is folded, it is combined with the second rotation part 74 of the tilt rotation part 70 and the folding of a pair of auxiliary panels 52 stops,

The pair of gear bars 62 are rotated while sliding while being inserted into the sliding guide 98 installed on the rear surface of the connection panel 52,

Each of the auxiliary panels 52 and each of the connecting panels 54 connected by the gear module 90 is configured to be folded so as to have a narrower interval than the folded interval of the pair of auxiliary panels 52 A hinge structure for an in-folding type flexible display device.
The method of claim 1,

A dust prevention groove 78 is formed in the upper side edge of the second rotating part 74, and a dust prevention rod 79 protruding from the body 76 is disposed in close contact with the dust prevention groove 78, A hinge structure for an in-folding type flexible display device, characterized in that when the second rotating part (74) rotates in the first rotating part (72), dust is prevented from entering through the dust preventing groove (78).