WO2022154445A1

WO2022154445A1 - Hinge for foldable display device, having anti-clearance structure

Info

Publication number: WO2022154445A1
Application number: PCT/KR2022/000508
Authority: WO
Inventors: 이성준; 박현민
Original assignee: (주)에이유플렉스
Priority date: 2021-01-12
Filing date: 2022-01-11
Publication date: 2022-07-21
Also published as: KR20220102081A

Abstract

The present invention relates to a hinge for a foldable display, having an anti-clearance function. More specifically, the junction at which a foldable hinge mounted in the center of a foldable display device and a panel body in which a display panel is mounted are connected to each other is likely to suffer a clearance due to a small gap, and in this context, the present invention provides a hinge for a foldable display device, having an anti-clearance function capable of preventing the connected portion of the foldable hinge and the panel body from rattling due to such a clearance.

Description

Hinge for foldable display with anti-gaps function

The present invention relates to a hinge for a foldable display having a gap prevention function. More specifically, the portion where the foldable hinge installed in the center of the foldable display device and the panel body where the flexible display panel is installed is connected to each other is fine. It relates to a hinge for a foldable display device having a play preventing function that prevents a gap between the foldable hinge and a panel body from being shaken due to the gap, which is likely to occur due to the gap.

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 not only changes and improvements of structural components forming the mobile terminal, but also additions and improvements of software or hardware.

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 movies.

Therefore, a transitional form will be used a lot until the development of the flexible display progresses and its 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 on 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).

The present invention provides a stopper arm for controlling the folding rotation range to prevent a panel body connected to a foldable hinge located in the center of a foldable display device from shaking slightly when folding or unfolding, and a gear for preventing shaking An object of the present invention is to provide a hinge for a foldable display device having a play preventing function configured to connect the arm to a play preventing arm connected to a panel body.

In order to achieve the above object, a hinge for a foldable display device having a gap prevention function according to the present invention includes a hinge body (70);

a pair of anti-playout arms 22 connected to the left and right sides of the hinge body 70 to rotate;

a pair of gear arms 30 and a pair of stopper arms 50 connected to the gap prevention arm 22 to rotate together;

When the pair of stopper arms 50 are fully unfolded, the pair of stopper arms 50 are rotated 180 degrees by the stopper 52,

The pair of gear arms 30 is characterized in that the force is applied in the opposite direction to the direction in which the pair of stopper arms 50 apply the force to the play prevention arm 22,

A first fixed friction plate 42 and a second fixed friction plate 44 that are installed in close contact with the front surface of the pair of gear arms 30 are disposed,

Between the first and second fixed friction plates 44, a rotation friction plate 44 that rotates simultaneously when the gear arm 30 rotates is installed,

In the gear arm 30, the rear part of the gear is configured with a cam part 32 formed of mountains and valleys,

The cam portion 32 of the gear arm 30 is engaged with a moving cam 36 having a cam portion 37 formed of a mountain and a valley, and the moving cam 36 of the present invention includes a spring 38 and a spring 38 that apply an elastic force. ) characterized in that it is configured to be connected with the bracket 40 supporting the

Rotating rails 74 are installed on the left and right sides of the hinge body 70, respectively, and a rotating plate 72 that is inserted into the rotating rail 74 of the present invention to rotate is installed, and the rotating plate 72 of the present invention is a gear 76 ) and the connecting gear unit 78 and gear-coupled,

The connecting gear portion 78 is characterized in that it is coupled with the play prevention arm 22 of the present invention.

The hinge for a foldable display device having a play preventing function according to the present invention has a remarkable effect of preventing the panel body connected to the foldable hinge located in the center of the foldable display device from shaking slightly when the folding or unfolding operation is performed. there is

In the present invention, the stopper arm for controlling the rotation range and the gear arm for preventing shaking are configured to be connected together with the anti-play arm, so that the central foldable hinge and the panel body are connected to each other from shaking.

When the foldable display device of the present invention is folded, the auxiliary panel attached to the rotating plate is configured to go inside, and the folded portion of the flexible display panel is located between the pair of auxiliary panels, so that the folded portion of the flexible display panel has a large diameter in a circular shape. can be configured, so that the possibility of damage even when the flexible display panel is folded is significantly lowered.

1 is a perspective view illustrating a state in which a flexible display panel is separated from a foldable display device in which a hinge for a foldable display having a gap prevention function according to the present invention is installed.

2 is a perspective view illustrating a state in which one panel body and an auxiliary panel are separated from the hinge for a foldable display having a gap prevention function according to the present invention.

3 is an enlarged perspective view showing a part of the hinge for a foldable display having a gap prevention function according to the present invention, in which one side of the auxiliary panel is separated.

4 is a perspective view illustrating a state in which the hinge for a foldable display having a gap prevention function according to the present invention is being folded.

5 is an enlarged perspective view illustrating a state in which the hinge for a foldable display having a play preventing function according to the present invention is being folded.

6 is a perspective view showing a state in which the hinge for a foldable display having a gap prevention function according to the present invention is completely folded.

7 is a perspective view illustrating a state in which the hinge for a foldable display having a gap prevention function according to the present invention is installed on the hinge base.

8 is a perspective view illustrating a hinge for a foldable display having a gap prevention function according to the present invention.

9 is an exploded perspective view showing an exploded state of the hinge for a foldable display having a gap prevention function according to the present invention.

10 is an exploded perspective view illustrating an exploded state of the friction plate part in the hinge for a foldable display having a play preventing function according to the present invention.

11 is a plan view viewed from above the elastic part installed behind the 4-axis gear part of the present invention.

12 is a front view of a pair of stopper arms moving in the hinge for a foldable display having a gap prevention function according to the present invention.

13 is a perspective view illustrating a moving state of the 4-axis gear unit to which the friction plate unit is attached according to the present invention.

14 is a front view of the movement of the 4-axis gear unit to which the friction plate unit is attached according to the present invention as viewed from the front.

15 is an exploded perspective view illustrating a state in which a gear arm and a stopper arm are connected to a play preventing arm in the hinge for a foldable display having a play preventing function according to the present invention.

16 is a perspective view and a side cross-sectional view showing the direction in which a gear arm and a stopper arm apply a force from the play preventing arm in a state in which a pair of play preventing arms are fully unfolded in the hinge for a foldable display having a play preventing function according to the present invention.

17 is a perspective view and a side cross-sectional view showing the direction in which a gear arm and a stopper arm apply a force from the play preventing arm while a pair of play preventing arms are being folded in the hinge for a foldable display having a play preventing function according to the present invention.

18 is a perspective view and a side cross-sectional view showing a direction in which a gear arm and a stopper arm apply a force from the play preventing arm in a state in which a pair of play preventing arms are fully folded in the hinge for a foldable display having a play preventing function according to the present invention.

19 is a front view of the stopper arm and the anti-playout arm moving while the pair of anti-gaps arms are all folded in the hinge for a foldable display having a play preventing function according to the present invention.

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

4: flexible display panel 10: panel body

12: auxiliary panel 22: anti-gaps arm

23: fitting groove 30: gear arm

31: wing 36: moving cam

38: spring 40: bracket

50: stopper arm 52: stopper

70: hinge body 72: rotating plate

74: rotary rail 76: gear

78: connecting gear unit

Referring to FIG. 1 , in the foldable display device according to the present invention, a foldable hinge is configured at the center, and a panel body 10 is configured on both sides of the foldable hinge, respectively.

Each panel body 10 of the present invention is attached to a flexible display panel 4 on which moving pictures, images, etc. are displayed.

2 is a perspective view illustrating a state in which one panel body and an auxiliary panel are separated from the hinge for a foldable display having a gap prevention function according to the present invention. 3 is an enlarged perspective view showing a part of the hinge for a foldable display having a gap prevention function according to the present invention, in which one side of the auxiliary panel is separated.

2 and 3, the auxiliary panel 12 is attached to the rotating plate 72 of the foldable hinge of the present invention. The panel body 10 is connected to the anti-gaps arm 22 of the present invention.

4 is a perspective view illustrating a state in which the hinge for a foldable display having a gap prevention function according to the present invention is being folded. 5 is an enlarged perspective view illustrating a state in which the hinge for a foldable display having a play preventing function according to the present invention is being folded.

4 and 5 , when the device for a foldable display according to the present invention is folded, the auxiliary panel 12 is moved inside.

6 is a perspective view showing a state in which the hinge for a foldable display having a gap prevention function according to the present invention is completely folded. 7 is a perspective view illustrating a state in which the hinge for a foldable display having a gap prevention function according to the present invention is installed on the hinge base.

6 and 7, three hinges are installed on the hinge base 18 of the foldable hinge of the present invention.

Referring to FIG. 8 , the hinge for a foldable display having a play preventing function according to the present invention includes a pair of play preventing arms 22, which rotate in opposite directions at the same time, and when the play preventing arms 22 of the present invention rotate together. It is composed of a rotating plate 72 that rotates while sliding along the rotating rail 74 .

Referring to FIG. 9 , the hinge for a foldable display having a play preventing function according to the present invention includes a hinge body 70 and a pair of play preventing arms 22 connected to the left and right of the hinge body 70 of the present invention to rotate. ), a pair of gear arms 30 and a pair of stopper arms 50 that are connected to and rotate together with the anti-play arm 22 of the present invention.

A pair of anti-play arm 22 according to the present invention slides along the stopper arm 50 and the gear arm 30 when rotating to be folded or unfolded.

The pair of stopper arms 50 of the present invention are configured such that, when fully unfolded, the angle unfolded by the stopper 52 becomes 180 degrees.

A first fixed friction plate 42 and a second fixed friction plate 46 installed in close contact with the front surface of the pair of gear arms 30 of the present invention are disposed, and between the first and second fixed friction plates 44 of the present invention A rotary friction plate 44 that rotates at the same time as the gear arm 30 rotates is installed.

A cam part 32 formed of mountains and valleys is configured at the rear of the gear part 33 of the gear arm 30 according to the present invention, and the cam part 32 of the gear arm 30 of the present invention is a cam part ( 37) is engaged with the formed moving cam 36, and the moving cam 36 of the present invention is configured to be connected with a spring 38 applying an elastic force and a bracket 40 supporting the spring 38.

Rotating rails 74 are installed on the left and right sides of the hinge body 70 of the present invention, respectively, a rotating plate 72 that is inserted into the rotating rail 74 of the present invention to rotate is installed, and the rotating plate 72 of the present invention is a gear (76) and the connecting gear portion (78) and gear-engaged.

The connecting gear portion 78 of the present invention engages with the play prevention arm 22 of the present invention.

Referring to FIG. 10 , the friction plate according to the present invention includes a first fixed friction plate 42 and a second fixed friction plate 44 that are installed in close contact with the front surface of the gear part 33 of the pair of gear arms 30 of the present invention. ) is disposed, and between the first and second fixed friction plates 44 of the present invention is connected to the gear part 33 of the gear arm 30, and the rotation friction plate 44 rotates simultaneously when the gear part 33 rotates. ) is installed.

Due to the configuration of the friction plate portion of the present invention, it is possible to perform a free-stop function for the pair of gear arms 30 to stop at an angle desired by the user.

A pair of gear arms 30 according to the present invention always rotates in opposite directions to each other at the same angle. This is because the pair of gear arms 30 is constituted by a four-axis gear portion composed of two gears 34 between the gear portion 33 of each gear arm 30 and the pair of gear portions 33 .

11, the rear part of the gear part 33 of the gear arm 30 according to the present invention is configured with a cam part 32 formed of mountains and valleys, and the cam part 32 of the gear arm 30 of the present invention is a valley. A cam portion 37 composed of an acid is engaged with the formed moving cam 36, and the moving cam 36 of the present invention is connected to a spring 38 applying an elastic force and a bracket 40 supporting the spring 38. is made up

Referring to FIG. 12 , when the pair of stopper arms 50 according to the present invention are fully unfolded, the pair of stopper arms 50 constitute 180 degrees by the stopper 52 and are unfolded in a straight line.

When the pair of stopper arms 50 according to the present invention are all folded, each stopper arm 50 forms a right angle with the ground by the stopper 52 . Accordingly, the pair of stopper arms 50 of the present invention are arranged parallel to each other.

13 is a perspective view illustrating a moving state of the 4-axis gear unit to which the friction plate unit is attached according to the present invention. 14 is a front view of the movement of the 4-axis gear unit to which the friction plate unit is attached according to the present invention as viewed from the front.

13 and 14, when the pair of stopper arms 50 of the present invention are fully unfolded to be 180 degrees, the pair of gear arms 30 are configured to rotate more than 180 degrees.

This is at the point where the pair of gear arms 30 are rotated in opposite directions by 180 degrees or more, the convex and concave mountains of the cap part 32 formed on the rear surface of the gear part 33 of each gear arm 30 of the present invention. This is because the elastic force by the spring 38 is applied to the moving cam 36 so as to mesh with the concave trough and the convex ridge of the cam portion 37 of the moving cam 36 of the present invention by the trough.

And, when the pair of stopper arms 50 of the present invention are each folded by 90 degrees so that they are parallel to each other, the pair of gear arms 30 are each configured to rotate beyond the range in which the pair of stopper arms 50 are folded. .

This is at a point where the pair of gear arms 30 are rotated in opposite directions to each other beyond the range in which the pair of stopper arms 50 are rotated and folded, respectively, of the gear portion 33 of each gear arm 30 of the present invention. The elastic force by the spring 38 is applied to the moving cam 36 so that the convex and concave ridges of the cap part 32 formed on the rear surface engage the concave ridges and convex ridges of the cam part 37 of the moving cam 36 of the present invention. This is because it is designed to be

15, the wing part 31 of the gear arm 30 and the wing part 51 of the stopper arm 50 are provided in the fitting grooves 23 on the left and right of the play preventing arm 22 according to the present invention, respectively. The gear arm 30 and the stopper arm 50 are also configured to rotate to be folded or unfolded at the same time when the pair of gap prevention arms 22 are rotated to be folded or unfolded while being inserted.

The pair of stopper arms 50 and the stopper 52 of the present invention are made to be 180 degrees to each other in the state of the pair of anti-gaps 22 in the unfolded state, and to be parallel to each other in the folded state.

That is, the stopper arm 50 and the stopper 52 of the present invention rotate in the opposite direction to each other only up to 90 degrees when a pair of play prevention arms 22 are unfolded in a straight line at 180 degrees to each other, when folded. It controls the scope.

The gear arm 30 according to the present invention, which receives elastic force by the spring 38 of the present invention, is in the downward direction of each anti-play arm 22 in a state in which a pair of anti-play arms 22 are unfolded to be 180 degrees to each other. A force (elastic force) is applied, and in a state in which the pair of anti-play arms 22 according to the present invention are fully folded by 90 degrees in opposite directions, respectively, the elastic force is continuously applied in the direction in which the pair of anti-play arms 22 are rotated to be folded. apply

In this way, in the state in which the pair of anti-gathering arms 22 according to the present invention is unfolded or folded to the point where rotation is stopped by the stopper arm 50 and the stopper 52, the pair of gear arms 30 according to the present invention ) continues to apply an elastic force to the anti-play arm 22 in the same direction as the direction in which the anti-play arm 22 rotates.

Because of this configuration, the play preventing arm 22 of the present invention is shaken due to play between the fitting groove 23 of the play preventing arm 22 and the wing portion 51 of the stopper arm 50 in the fully unfolded or fully folded state. blur is prevented.

Referring to FIG. 16 , the wing portion 51 of the stopper arm 50 fitted in the fitting groove 23 of the play prevention arm 22 in a state in which the pair of anti-playout arms 22 according to the present invention is fully unfolded and fitted There is a fine gap between the grooves 23, and play is likely to occur.

In the pair of anti-play arm 22 according to the present invention, in addition to the stopper arm 50, the gear arm 30 is connected to the anti-play arm 22, and as shown in (b), the gear arm 30 has a spring 38 ) by pressing the stopper arm 50 in the downward direction as shown by the arrow by the elastic force of Shaking due to the gap between them is prevented.

Referring to FIG. 17 , the wing part 31 is inserted into the fitting groove 23 of the play prevention arm 22 while the pair of play prevention arms 22 according to the present invention are folded and the gear arm 30 is folded together. An elastic force is applied to the play prevention arm 22 in the direction of the arrow.

Referring to FIG. 18 , in a state in which a pair of anti-play arm 22 according to the present invention is fully folded to the extent permitted by the stopper 52 for controlling the rotation range of the stopper arm 50, the anti-play arm 22 Due to the minute gap between the wing portion 51 and the fitting groove 23 of the stopper arm 50 fitted in the silver fitting groove 23, it is easy to generate a minute shake.

In addition to the stopper arm 50 of the pair of anti-play arm 22 according to the present invention, the gear arm 30 is connected to the anti-play arm 22 .

And, as shown in (b), the gear arm 30 exerts a pressing force in the direction in which the pair of play prevention arms 22 are further folded as shown by the arrow by the elastic force of the spring 38. In a state in which the play prevention arm 22 is fully folded, shaking due to the gap between the fitting groove 23 and the

wing portions

51 and 31 is prevented.

Referring to FIG. 19 , since the wing 51 of the stopper arm 50 of the present invention is fitted in the fitting groove 23 of the anti-play arm 22 and slides, the range in which the anti-play arm 22 of the present invention rotates. is controlled by the stopper arm 50 and the stopper 52 .

A pair of anti-gaps arm 22 according to the present invention constitutes an angle of 180 degrees to each other in the fully unfolded state, and is configured to be folded by an angle of 90 degrees in the opposite direction, respectively.

The anti-play arm 22 of the present invention is also connected to the stopper arm 50, and the pair of anti-play arm 22 according to the present invention stops the folding or unfolding operation by the stopper 52 of the stopper arm 50. Even in one state, an elastic force is applied so that the play prevention arm 22 is further folded or unfolded by the gear arm 30 .

The hinge for a foldable display device having a play preventing function according to the present invention has a structure in which a foldable hinge located in the center is connected to a panel body and a play preventing arm is connected to a stopper arm that controls the rotation range of the panel body and slides In the present invention, the anti-gaps arm prevents shaking caused by the minute gap between the stopper arm and the sliding part, thereby providing a structure for providing the user with a foldable smartphone with no shaking of the panel body.

As mentioned above, although the present invention has been described with limited configuration and drawings, the technical spirit of the present invention is not limited thereto, and by those of ordinary skill in the art to which the present invention pertains, the technical spirit of the present invention and the following Various modifications and variations will be possible within the scope of equivalents of the claims to be described.

Claims

hinge body (70);

a pair of anti-playout arms 22 connected to the left and right sides of the hinge body 70 to rotate;

a pair of gear arms 30 and a pair of stopper arms 50 connected to the gap prevention arm 22 to rotate together;

When the pair of stopper arms 50 are fully unfolded, the pair of stopper arms 50 are rotated 180 degrees by the stopper 52,

The pair of gear arms (30) is a foldable display device having a play preventing function, characterized in that the pair of stopper arms (50) apply a force in a direction opposite to the direction in which the force is applied to the play preventing arm (22) dragon hinge.
The method of claim 1,

A first fixed friction plate 42 and a second fixed friction plate 44 that are installed in close contact with the front surface of the pair of gear arms 30 are disposed,

A hinge for a foldable display device having a play preventing function, characterized in that a rotary friction plate (44) that rotates simultaneously when the gear arm (30) rotates is installed between the first and second fixed friction plates (44).
The method of claim 1,

In the gear arm 30, the rear part of the gear is configured with a cam part 32 formed of mountains and valleys,

The cam portion 32 of the gear arm 30 is engaged with a moving cam 36 having a cam portion 37 formed of a mountain and a valley, and the moving cam 36 of the present invention includes a spring 38 and a spring 38 that apply an elastic force. ) A hinge for a foldable display device having a play preventing function, characterized in that it is connected to the bracket 40 supporting the .
The method of claim 1,

Rotating rails 74 are installed on the left and right sides of the hinge body 70, respectively, and a rotating plate 72 that is inserted into the rotating rail 74 of the present invention to rotate is installed, and the rotating plate 72 of the present invention is a gear 76 ) and the connecting gear unit 78 and gear-coupled,

The connecting gear unit (78) is a hinge for a foldable display device having a play preventing function, characterized in that it is coupled with the play preventing arm (22) of the present invention.