WO2023149763A1

WO2023149763A1 - Hinge device for foldable device

Info

Publication number: WO2023149763A1
Application number: PCT/KR2023/001632
Authority: WO
Inventors: 윤태중; 이정현
Original assignee: 주식회사 아이피엘랩스
Priority date: 2022-02-06
Filing date: 2023-02-06
Publication date: 2023-08-10
Also published as: KR102492937B1

Abstract

The present invention relates to a hinge device for a foldable device and, more specifically, to a hinge device for a foldable device, which can: rotate a first device and a second device which constitute the foldable device, about a single axis of rotation; support a flexible display on a single plane, when unfolded, and maximize a free space for folding, and thus can prevent damage to the flexible display; with a minimal configuration, provide the free space for folding and stably support the display on a single plane during unfolding; symmetrically rotate the first device and the second device without an additional component for synchronization; and fundamentally block inflow of foreign substances during a folding or unfolding process.

Description

Hinge device for foldable device

The present invention relates to a hinge device mounted on a foldable or unfolded portion of a foldable device. More specifically, the foldable device has a structure that is folded and unfolded by applying a flexible display, and a foldable hinge is provided in the center of the foldable device. The present invention relates to a hinge device capable of stably supporting a display while maintaining a flat state when unfolded while securing a free space.

Displays having a curved surface are being released from the conventional flat panel displays, such as the recent popularization of curved displays. In addition, displays that can be folded or unfolded like foldable devices are being mass-produced.

A foldable device is basically a device to which a flexible display panel is applied, and a display panel is not formed on a hard substrate such as a glass substrate as in conventional LCD and OELD, but a circuit element is formed on a substrate that can be bent to display an image even when bent. It is a device that can

Since these foldable devices are bendable or foldable devices, the foldable part is more likely to be damaged than the non-foldable part, and must be able to maintain the same flatness as the FPD during unfolding, that is, when unfolded.

However, conventional FPDs do not basically assume folding, so there is no folding structure, and a common hinge device can be a hinge. When a hinge device that simply folds or unfolds is directly applied to a flexible substrate such as a foldable display, There is a problem that the curvature is too small to secure enough durability to be applied in a practical environment, such as damaging the desired foldable display.

In order to solve this problem, a hinge device for a conventional foldable display device is disclosed in Korean Patent Registration No. 10-1875855, and in Patent No. 855, a flexible panel is provided as a first body, a second body, a first support, and a second body. It is supported through two supports, and the first body and the second body are connected in a foldable manner through a hinge member. Can be supported on a single plane. However, as a structure in which the first body and the second body are folded through different rotational axes and an empty space is formed between the first support and the second support, a structural structure that cannot support a flexible panel in one single plane there is a problem. For this reason, when folding/unfolding is repeated, fold marks inevitably occur at the folded portion of the flexible panel, and there is a problem in that a perfect flat panel cannot be formed during unfolding. In addition, since there are many essential components included in the hinge device, the operation is complicated, and since there are many rotating shafts, there is a possibility that the left and right bodies of the hinge device operate separately. In addition, in order to prevent this problem, a separate configuration is required, and durability is deteriorated as the first and second bodies are rotated to their respective rotation centers.

The present invention is to solve the above problems, and the first device and the second device constituting the foldable device can be rotated on one axis of rotation, and when unfolded, while supporting the flexible display on a single plane, when folded. Free space can be maximized to prevent damage to the flexible display, and with minimal configuration, free space during folding and a single plane during unfolding can stably support the display, and configuration for separate synchronization It is an object of the present invention to provide a hinge device for a foldable device capable of symmetrically rotating a first device and a second device without the need for a foldable device and completely blocking the inflow of foreign matter during folding or unfolding.

In order to achieve the above object, the hinge device for a foldable device of the present invention is a hinge device provided at a folding/unfolding portion of a foldable device including a first device and a second device. A first connection portion including a first protrusion pivotally connected to one end and two or more foldable link portions positioned on the first device, and a second protrusion pivotally connected to one end of the first device and an upper portion of the second device A second connection part including two or more foldable link parts located on the , a rotation part connecting the first connection part and the second connection part so that the first connection part and the second connection part rotate around one rotational axis between the first device and the second device; It includes a first fixing part rotatably connecting the first connection part and the first device, and a second fixing part rotatably connecting the second connection part and the second device.

In addition, the first protrusion and the second protrusion are characterized in that they overlap each other in an interdigitated shape between the first device and the second device to form a single plane when unfolded.

The pivoting part may connect the first connection part and the second connection part to be rotated around a rotation axis at a lower part of the display included in the foldable device when the folding or unfolding is performed.

In addition, the first fixing part and the second fixing part are characterized in that the first connection part and the second connection part are rotatably connected to each other inside the side surfaces of the first device and the second device facing each other.

The first connection part includes a second link part including a first protrusion pivotally connected to the second device and a first link part foldably connected to the second link part. It is characterized in that it consists of a fourth link portion including a second protrusion pivotally connected to one device and a third link portion foldably connected to the fourth link portion.

In addition, the shape of each contact surface of the first link part and the second link part, the second link part and the fourth link part, and the fourth link part and the third link part is either clockwise or counterclockwise when folded or unfolded. It is characterized in that it has an engaged shape in a tapered state having a certain inclination so that rotation is possible in only one direction.

In addition, in the first device and the second device, a moving path is guided so that the first link unit and the third link unit move rotatably during folding/unfolding at a portion in contact with the first link unit and the third link unit, respectively. It is characterized in that the guiding portion is provided.

In addition, the first link part and the third link part are pivotally connected through a first pivot connection part and a second pivot connection part provided below the first device and the second device, and the first link part and the third link part On one side of the upper portion, a first extension portion and a second extension portion are formed between the first device and the first link portion and between the second device and the third link portion to support the display included in the foldable device during folding/unfolding. characterized by

In addition, the first connection unit further includes a fifth link unit for rotatably connecting the first link unit and the second link unit between the first link unit and the second link unit, and the second connection unit connects the third link unit and the second link unit. A sixth link unit rotatably connecting the third link unit and the fourth link unit between the fourth link units is further included.

In addition, a first anti-rotation part extending below the first link part or the second link part is formed at one end or both ends of the fifth link part, and at one end or both ends of the sixth link part, a third link part or a second anti-rotation part is formed. A second anti-reverse rotation unit is formed extending below the 4-link unit, the first anti-reverse rotation unit and the second anti-reverse rotation unit form a single plane when unfolded, and are included in the foldable device during folding or unfolding. It is characterized in that it moves only to the lower part of the displayed display.

In addition, long holes having a constant length in the horizontal direction are formed in the first and third link parts, and protrusions coupled to the long holes are formed in the second link part or the fifth link part coupled to the first link part. And, a protrusion coupled to the long hole portion is formed in the fourth link portion or the sixth link portion coupled to the third link portion, and is rotatably coupled.

In addition, a foreign matter prevention member made of a flexible material is inserted between the display included in the foldable device and the first connection part or the second connection part to prevent foreign matter from entering from the outside.

In addition, the foreign matter prevention member is characterized in that it is coupled through a close coupling portion for close contact with the second link portion and the fourth link portion during folding/unfolding.

According to the present invention having the configuration as described above, the flexible panel maintains the maximum curvature when the foldable device is folded, and when the foldable device is unfolded, it is possible to stably support the foldable device while maintaining a perfect single plane.

In addition, since the devices on both sides of the foldable device can rotate through one axis of rotation, synchronized folding or unfolding can be performed without a separate configuration.

In addition, stable rotation is possible without a separate configuration during folding/unfolding through a link structure directly connected to the foldable device.

In addition, inflow of foreign matter to the rear surface of the display can be fundamentally blocked through the hinge device during the folding or unfolding process.

1 is a perspective view of a hinge device for a foldable device according to an embodiment of the present invention;

2a and 2b are cross-sectional views of a hinge device for a foldable device according to the first embodiment of the present invention when folding/unfolding with and without a foreign matter prevention member;

3 is a cross-sectional view of a folding/unfolding hinge device for a foldable device according to a second embodiment of the present invention;

4 is a perspective view of a third embodiment of a hinge device for a foldable device according to the present invention;

5 is a perspective view of a fourth embodiment of a hinge device for a foldable device according to the present invention;

6 is an exploded cross-sectional view of a fourth embodiment of a hinge device for a foldable device according to the present invention;

7 is a plan view of a foldable device to which a hinge device for a foldable device of the present invention is applied;

8 is a diagram showing a positional relationship during folding/unfolding of a hinge device for a foldable device according to an embodiment of the present invention;

9 is a diagram showing an example of expanding an internal space when the hinge device for a foldable device according to the present invention is folded.

Hereinafter, a hinge device for a foldable device according to the present invention will be described in detail with reference to the drawings.

1 is a perspective view of a hinge device for a foldable device according to an embodiment of the present invention, and FIGS. 2a and 2b are cases in which a foreign matter prevention member is present and absent in a first embodiment of the hinge device for a foldable device according to the present invention. 3 is a cross-sectional view of a hinge device for a foldable device according to a second embodiment of the present invention when it is folded/unfolded, and FIG. 4 is a cross-sectional view of a hinge device for a foldable device according to the present invention. 5 is a perspective view of a hinge device for a foldable device according to a fourth embodiment of the present invention, and FIG. 6 is an exploded cross-sectional view of a hinge device for a foldable device according to a fourth embodiment of the present invention, and FIG. 7 is a perspective view of a third embodiment. is a plan view of a foldable device to which the hinge device for a foldable device of the present invention is applied, and FIG. 8 is a view showing a positional relationship during folding/unfolding of the hinge device for a foldable device according to an embodiment of the present invention. 9 is a diagram showing an example of expanding the internal space when the hinge device for a foldable device according to the present invention is folded.

The foldable device includes a flexible display, and when unfolded, that is, when unfolded, the display must be supported to maintain a flat state, and when folded, free space is provided so that the curvature of the folded part is maximized so that the display does not become sharp. need to secure However, conventional hinge devices are difficult to uniformly secure flatness during unfolding and have limitations in maintaining the maximum curvature of the display during folding. In addition, since the hinge device is not only complexly configured, but also the left and right bodies rotate around separate rotational axes around the hinge device, there is a problem in that folding/unfolding cannot be performed symmetrically.

The hinge device for a foldable device of the present invention is to solve this problem, and folds/unfolds the foldable device including the first device 10 and the second device 20 provided on both sides around the folded portion. In the hinge device provided at the portion, the first protrusion 150 pivotally connected to one end of the second device 20 within a preset angular range and the first protrusion 150 positioned on the side of the first device 10 to be foldable A first connection part 100 including two or more link parts connected to each other, a second protrusion part 250 pivotally connected to one end of the first device 10 within a preset angular range, and a second device 20 The second connection part 200 including two or more link parts that are foldably connected to each other located on the side, and the first connection part 100 and the second connection part between the first device 10 and the second device 20 ( 200) is connected so that it rotates around one axis of rotation; a first fixing portion 180 that rotatably connects the first connection portion 100 and the first device 10; and a second connection portion. It includes a second fixing part 280 that rotatably connects the 200 and the second device 20 .

The first connection part 100 of the present invention is pivotally connected to one upper end of the second device 20 through the first protrusion part 150 and includes two or more foldable link parts located on the side of the first device 10. do. Similarly, the second connection unit 200 is pivotally connected to one end of the upper portion of the first device 10 through the second protrusion 250 and includes two or more foldable link units located on the side of the second device 20. . In addition, the first fixing part 180 connecting the lower end of the first connection part 100 and the first device 10 and the second connecting part 180 connecting the lower end of the second connection part 200 and the second device 20. A fixing part 280 is included. The first fixing part 180 and the second fixing part 280 are the parts of the first device 10 and the second device 20, respectively, where the first device 10 and the second device 20 face each other. It is preferable that the first fixed coupling portion 14 and the second fixed coupling portion 24 are rotatably coupled to each other provided inside the side surface. This maintains stable rotation of the first connection part 100 and the second connection part 200 in the process of folding/unfolding the first device 10 and the second device 20 and is symmetrical to each other without a separate synchronization configuration. It can be made to turn negatively. In addition, there is an advantage in that the left and right sides of the rotation unit 300 are induced to rotate about one rotation axis C, and the display 30 of the foldable device can maintain the maximum curvature when folded. Of course, the first fixed coupling portion 14 and the second fixed coupling portion 24 may be located on the lower surfaces of the first device 10 and the second device 20, but the radius around which the rotating portion 300 rotates It is necessary to select a location taking into account.

In this way, the first connection unit 100 and the second connection unit connect the first device 10 and the second device 20 to each other, so that an intersection occurs between the first device 10 and the second device 20. will do That is, there are portions D that overlap each other, and a pivoting portion 300 is provided in the overlapping portion D to rotate around one rotation axis during folding/unfolding. In addition, to form a single plane during unfolding, that is, when the foldable device is unfolded, the portion D where the first connection portion 100 and the second connection portion 200 overlap each other is formed in an interdigitated shape. Of course, it is the same in other embodiments that the overlapping portions D are formed in an interlocking shape.

The first embodiment of the present invention is shown in FIGS. 2a and 2b, in which the first connection part 100 is composed of two link parts, a first link part 110 and a second link part 120, and the second connection part 200 ) is composed of two link parts, the third link part 210 and the fourth link part 220. The second link unit 120 is connected to the second device 20 through the first protrusion 150 and the fourth link unit 220 is connected to the first device 10 through the second protrusion 250 . The first link unit 110 is located on the side of the first device 10 but is not coupled to the first device 10, and has a shape in contact with each other when unfolded, as shown in FIGS. 2A and 2B. However, it is preferable to provide a guiding part 40 on the side of the first device 10 to naturally guide the first link part 110 during folding/unfolding in terms of stable folding/unfolding. Of course, even without the guiding portion 40, the second link portion 120 is coupled to the pivot portion 300 and the first fixing portion 180, and the first link portion 110 is foldable with the second link portion 120 There is no problem in folding/unfolding because it is tightly coupled. Although stable folding/unfolding is possible than the case without the guiding unit 40, the case without the guiding unit 40 is more advantageous in terms of securing the maximum curvature during folding. In addition, the guiding unit 40 may be installed on only one of the first device 10 and the second device 20, which may be applied in consideration of internal space utilization and stable folding/unfolding. 2a shows a state without the foreign matter prevention member 500, and FIG. 2b shows a state with the foreign matter prevention member 500. The state without the foreign matter prevention member 500 has the advantage of a simple configuration, but the possibility of foreign matter entering is high. There are disadvantages, and the state in which the foreign matter prevention member 500 is present has the advantage of being able to fundamentally prevent the inflow of foreign matter and improving the durability of the display 30, although the configuration is added.

The second embodiment of the present invention is shown in FIG. 3, and like the first embodiment, the first connection part 100 and the second connection part 200 each consist of two link parts. However, the first connection part 100 is coupled through the first coupling part 12 of the first device 10 and the first pivot connection part 130, and through the second device 20 and the first protrusion part 150. are combined Similarly, the second connection part 200 is coupled through the second coupling part 22 of the second device 20 and the second pivot connection part 230, and through the first device 10 and the second protrusion part 250. are combined

If the second embodiment of the hinge device for a foldable device of the present invention is described in more detail, the first connection part 100 includes a first link part 110 and a second link part 120, and the first link The unit 110 and the second link unit 120 are rotatably connected within a certain range. The first link unit 110 is connected to the first device 10 through the first pivot connection unit 130 and is rotated counterclockwise within a certain angle range in the example shown in the drawing. The second link unit 120 is connected to the second device 20 through the first protrusion 150 and is rotated counterclockwise within a predetermined angle range. The first link unit 110 and the second link unit 120 are rotatably connected through the first link connection unit 140 so as to be folded in the opposite direction of the plane on which the display 30 is provided within the first connection unit 100. do. Similar to the first connection unit 100, the second connection unit 200 also has a third link unit 210 connected to the second device 20 through a second pivot connection unit 230, and the fourth link unit 220 It is connected to the first device 10 through the second protrusion 250 . The third link unit 210 and the fourth link unit 220 are rotatably connected through the second link connection unit 240 so as to be folded in the opposite direction of the plane on which the display 30 is provided.

As described above, since the first connection unit 100 and the second connection unit 200 are connected across the first device 10 and the second device 20, the first connection unit 100 and the second connection unit 200 overlap each other. There is bound to be a part (D) that becomes. More specifically, the second link portion 120 of the first connection portion 100 and the fourth link portion 220 of the second connection portion 200 overlap each other on a single plane. In order to support the display 30 in a flat state, the first protrusion 150 of the second link unit 120 is inserted into the fourth link unit 220, and the fourth link unit 220 has a first protrusion 150. A groove having the same shape as that of the first protrusion 150 is formed. Similarly, a groove having the same shape as the second protrusion 250 of the fourth link unit 220 is formed in the second link unit 120 . Since they intersect each other in an interdigitated state, as shown in FIG. 7, in the hinge device for a foldable device of the present invention, the folded portion of the display 30 is not a single line segment, but a flat state in an interdigitated form, so that the conventional hinge device has It is possible to fundamentally prevent the occurrence of fold marks of the display 30 and support the entire display 30 without gap. In addition to this, the second link unit 120 passes through the first device 10 while being connected to the second device 20. If the first device 10 supports the second link unit 120 during unfolding, When folding, it is possible to prevent the first link unit 110 and the second link unit 120 from being folded by an external force applied to the display 30 . The fourth link unit 220 is also supported by the second device 20 on the same principle, so that the display 30 can be more firmly supported when unfolded.

One or more first protrusions 150 and one or more second protrusions 250 are provided, and the greater the number, the more firmly the first device 10 and the second device 20 can be fixed and fold marks can be minimized. There are advantages.

The display 30 of the foldable device is installed across the first device 10 and the second device 20, and includes the first connection part 100 and the second connection part 200 to secure the maximum curvature of the foldable part during folding. It is preferable that there is a site that is not bound in a certain region of .

The first connection part 100 and the second connection part 200 are rotatably connected to each other through the rotation part 300 . The pivoting part 300 is provided at the portion D where the first connection part 100 and the second connection part 200 overlap, and folds the first device 10 and the second device 20 around one rotational axis. /make it unfold. More specifically, after extending one end of the second link part 120 of the first connection part 100 and one end of the fourth link part 220 of the second connection part 200 to the lower part of the display 30, the extension It is preferable to provide the rotation part 300 at the site. In addition, by forming long holes 600 in the first link unit 110 and the third link unit 210, the first connection unit when folded is shorter than the distance between the first connection unit 100 and the second connection unit 200 when unfolded. Formation of curves in the display 30 can be prevented by increasing the distance between the terminal 100 and the second connection unit 200 when they are folded by L. It has a different form from the third embodiment shown in FIGS. 4 and 9, but performs the same function. That is, as shown in FIG. 9, the rotation axes of the first pivot connection part 130 and the second pivot connection part 230 are provided on the lower surfaces of the first device 10 and the second device 20 to form the first connection part ( 100) and the second connection portion 200 are folded, it is preferable to secure the separation distance L so that the length of the outer portion of the free space is greater than the length of the portion to which the display 30 is not coupled. Of course, any structure can be used as long as the length of the outer portion can be maintained to be greater than the length of the portion to which the display 30 is not coupled, and the same method as the third embodiment may be applied to the second embodiment.

The first link portion 110, the second link portion 120, the third link portion 210, and the fourth link portion 220 of the present invention have contact portions that come into contact with each other in a clockwise or counterclockwise direction. It is characterized by being rotated within a certain angle range in only one direction. When the contact portion is formed vertically, the contact portion must be spaced apart to allow each link portion to rotate, and this separation may cause crease marks on the display 30 . In order to solve this problem, it is preferable to form the contact part in a tapered state to have a certain slope or to form a curved protrusion and a curved groove so that it can rotate without separation.

For example, referring to the contacting portion of the first link unit 110 and the second link unit 120, the first link unit 110 and the second link unit 120 rotate to be folded to the lower part of the display 30. However, if the lower surface of the first link unit 110 has a long shape and the upper surface of the second link unit 120 has a long shape, on the contrary, when folded, it can rotate downward only to the top of the display 30. not folded In addition, since folding is possible without separation, the display 30 can be supported without gaps.

In addition, if a curved protrusion is formed on the first link part 110 and a curved groove is formed on the second link part 120 so that they come into contact with each other, rotation is possible without separation and smoother folding is possible, but the upper part of the display 30 Rotation is also possible, so a device to prevent this is required.

8 is a view explaining the positional relationship of each link unit of the hinge device for a foldable device according to the present invention when it is folded or unfolded. When the fourth link unit 220 is rotated to the center by a, the angle formed by the fourth link unit 220 and the first device 10 is b, and the angle formed by the first link unit 110 and the second link unit 120 is c, An angle between the first link unit 110 and the first device 10 is determined as d. That is, when the second link unit 120 and the fourth link unit 220 are rotated at a certain angle around the rotation unit 300, the other link units are also rotated in conjunction with each other. Therefore, since each link unit of the present invention is driven like a single rigid body, synchronization is achieved naturally without a separate configuration for synchronization, and structurally stable.

4 is a diagram showing a third embodiment of a hinge device for a foldable device of the present invention. Referring to this diagram, the third embodiment of the hinge device for a foldable device of the present invention will be described in more detail.

In the third embodiment, the first connection part 100 and the second connection part 200 are composed of three link parts, and a fifth link part 170 is provided between the first link part 110 and the second link part 120. and the sixth link unit 270 is inserted between the third link unit 210 and the fourth link unit 220 to maximize the free space inside the foldable device when the foldable device is completely folded to reduce the curvature of the display 30. There are advantages to maximizing retention. That is, when it is folded, the curvature of the display 30 can be maintained at a maximum, thereby preventing damage to the display 30 . In addition, when the first extension part 160 is provided on one side of the upper part of the first link part 110 and the first pivot connection part 130 is provided on the lower surface of the first device 10 to secure the separation distance L, the first There is an advantage in that the link part 110 can be rotated naturally and structurally weak parts can be reinforced. Of course, the second extension part 260 is also provided on one side of the upper part of the third link part 210. In addition, one side or both ends of the fifth link unit 170 and the sixth link unit 270 are formed extending downward from the first link unit 110 to the fourth link unit 220 to prevent reverse rotation. It is preferable to provide a first anti-reverse rotation unit 175 and a second anti-reverse rotation unit 275. In addition, if the fifth link unit 170 and the sixth link unit 270 each form a groove according to the shape of each link unit at the contact portion of the lower portions of the first device 10 and the second device 20, the maximum It can improve the curvature and has the advantage of being more stable.

5 shows a fourth embodiment of the present invention, but in the third embodiment, the long hole part 600 is applied to the first link part 110 and the second link part 210, and other configurations are the same.

The foreign matter prevention member 500 of the present invention is made of a bendable material configured to keep the display 30 flat during unfolding while preventing foreign substances from entering the rear surface of the display 30 during folding/unfolding, that is, made of flexible material. The foreign matter prevention member 500 is provided between the display 30, the first connection part 100, and the second connection part 200, and both ends extend to be inserted into the first device 10 and the second device 20. Even when the first link unit 110 and the third link unit 210 are separated, they are sealed to prevent foreign substances from entering the hinge device. In addition, the foreign matter prevention member 500 connects the second link part 120 and the fourth link part through the close coupling part 510 so as to be in close contact with the first connection part 100 and the second connection part 200 during folding/unfolding. When coupled to the 220, as shown in FIG. 7 during folding/unfolding, since it adheres to the first connection part 100 and the second connection part 200, a more uniform plane can be formed and free space can be maximized during folding. can be obtained with In addition, it goes without saying that the foreign matter prevention member 500 can also be applied to the first embodiment.

The cushioning material (not shown) of the present invention is made of an elastic material and is provided at a part where the first connection part 100 and the second connection part 200 contact the first device 10 and the second device 20 when folded. It is a structure that absorbs shock upon contact. This is a configuration to prevent the lower surfaces of the first device 10 and the second device 20 from being damaged when folding is performed with excessive force.

Claims

Folding/unfolding area of the foldable device including the first device and the second device

In the hinge device provided in,

A first protrusion and a first device pivotably connected to one end of the second device

A first connection portion including two or more foldable link portions located on the body;

A second protrusion and a second device pivotably connected to one end of the first device

A second connection portion including two or more foldable link portions located on the body;

The first connection part and the second connection part between the first device and the second device

A rotating part that connects to rotate around my axis of rotation;

A first fixing part rotatably connecting the first connection part and the first device;

Including a second fixing part for rotatably connecting the second connection part and the second device

become,

The first protrusion and the second protrusion fit each other between the first device and the second device.

It is arranged tightly and forms a single plane when unfolded to form a single plane included in the foldable device.

A hinge device for a foldable device, characterized in that for supporting a display.
In claim 1,

The hinge device for a foldable device, characterized in that the pivoting unit connects the first connection unit and the second connection unit to rotate around a rotation axis at a lower part of a display included in the foldable device when folding or unfolding.
In claim 1,

The hinge device for a foldable device, characterized in that the first fixing part and the second fixing part rotatably connect the first connecting part and the second connecting part, respectively, inside the side surface of the first device and the second device facing each other.
In claim 1,

The first connection part includes a second link part including a first protrusion pivotally connected to the second device and a first link part foldably connected to the second link part,

The second connection part comprises a fourth link part including a second protrusion pivotably connected to the first device and a third link part foldably connected to the fourth link part Hinge device for a foldable device, characterized in that .
In claim 5,

The shape of each contact surface of the first link part and the second link part, the second link part and the fourth link part, and the fourth link part and the third link part is either clockwise or counterclockwise when folded or unfolded. A hinge device for a foldable device, characterized in that it has a shape engaged in a tapered state with a certain inclination so that rotation is possible only in the direction of.
In claim 5,

In the first device and the second device, guiding guides a moving path so that the first link part and the third link part move rotatably during folding/unfolding at the part in contact with the first link part and the third link part, respectively A hinge device for a foldable device, characterized in that a portion is provided.
In claim 5,

The first link part and the third link part are pivotally connected through a first pivot connection part and a second pivot connection part provided below the first device and the second device, and the upper one side of the first link part and the third link part Characterized in that a first extension part and a second extension part supporting the display included in the foldable device are formed between the first device and the first link part and between the second device and the third link part during folding/unfolding. A hinge device for a foldable device.
In claim 5,

The first connection unit further includes a fifth link unit rotatably connecting the first link unit and the second link unit between the first link unit and the second link unit,

The hinge device for a foldable device further comprising a sixth link part for rotatably connecting the third link part and the fourth link part between the third link part and the fourth link part.
In claim 9,

A first anti-reverse rotation part extending to the lower part of the first link part or the second link part is formed at one end or both ends of the fifth link part,

A second anti-reverse rotation part extending to the lower part of the third link part or the fourth link part is formed at one end or both ends of the sixth link part,

The first anti-reverse rotation unit and the second anti-reverse rotation unit form a single plane when unfolded, and move only to the lower portion of the display included in the foldable device during folding or unfolding. Device.
In claim 5 or 9,

Long holes having a constant length in the horizontal direction are formed in the first link part and the third link part,

The second link part or the fifth link part coupled to the first link part has a protrusion coupled to the long hole part, and the fourth link part or the sixth link part coupled to the third link part has a protrusion coupled to the long hole part. A hinge device for a foldable device, characterized in that is provided and rotatably coupled.
In claim 1,

A hinge device for a foldable device, characterized in that a foreign matter prevention member made of a flexible material is inserted between the display included in the foldable device and the first connection part to the second connection part to prevent foreign matter from entering from the outside.
In claim 12,

The hinge device for a foldable device, characterized in that the foreign matter prevention member is coupled through a close coupling portion for close contact with the second link portion and the fourth link portion during folding/unfolding.