KR101285837B1 - portable electronic equipment having hinge module - Google Patents

Abstract

The present invention is to allow a dual type liquid crystal panel (LCD panel) forming a portable electronic device to be opened and closed relative to the hinge module (hinge module),
A portable electronic device having a hinge module according to an embodiment of the present invention includes a hinge module mounted at edges of a first liquid crystal panel, a second liquid crystal panel, and a fold edge of the first liquid crystal panel and the second liquid crystal panel, respectively. In the portable electronic device provided with a hinge module for connecting the first and second liquid crystal panel to be formed in the same plane or folded and overlapping in a relative rotation by the rotation,
The hinge module described above,
A housing mounted to the hinge coupler formed to face the folding portions of the first and second liquid crystal panels, respectively;
A first fixed shaft fixed to the first liquid crystal panel through the housing and to which the rolling cam is mounted;
A second fixed shaft accommodated in the housing and disposed in parallel with the first fixed shaft, to which the fixed coupling is mounted;
A flow shaft separated from the second fixed shaft and fixed to the second liquid crystal panel through the housing coaxially with the second fixed shaft;
A pair of cam gears mounted on one end of the first fixed shaft and the second fixed shaft, respectively, and rotating the first and second fixed shafts at a constant angular velocity;
A cam plate coupled to the first fixed shaft and the second fixed shaft so as to be movable in an axial direction and relatively rotating the first and second fixed shafts by a camp profile formed on a contact surface with the cam gear;
Oldham, which is mounted between the second fixed shaft and the flow shaft, moves the shaft apart from the axis of the second fixed shaft due to the cam motion of the rolling cam when the first and second fixed shafts rotate due to the relative rotation of the first and second liquid crystal panels. Couplings,
Pressing means for elastically supporting the cam gear and the cam plate to expand or maintain the first and second liquid crystal panels.

Description

Portable electronic equipment having hinge module

The present invention relates to a portable electronic device provided with a hinge module, and more particularly, a dual type liquid crystal panel (LCD panel) constituting the portable electronic device is rotated relative to and opened by a hinge module. The present invention relates to a portable electronic device provided with a hinge module.

The above-mentioned portable electronic device refers to a device made of a mobile phone as well as a general portable terminal such as a laptop computer, an electronic dictionary, a PDA, and the like.

In general, a portable electronic device such as a folding cell phone or an electronic dictionary is configured such that a plate-shaped first liquid crystal panel and a second liquid crystal panel can be rotated relative to each other by a hinge module for integrally connecting them.

On the other hand, in the case of a clamshell mobile phone, a hinge module is designed to rotate the first and second liquid crystal panels by 360 degrees, and the hinge module has a main body part (referring to the first liquid crystal panel) and a folder part (second liquid crystal panel). It is not equipped with a locking device of the) is a sense of stability when the actual angle is adjusted. In view of these problems, a pair of gears engaged with each other are provided in the hinge part, but the number of parts increases, the structure becomes complicated, and the thickness increases, contrary to the trend of slimming portable electronic devices, and the hinge module is moved to the outside. Due to the exposed structure, the appearance is deteriorated, and when the liquid crystal panel is opened and closed, the display unit may be rotated to be approached and spaced apart from each other.

As a result, in the case of a portable electronic device in which a display unit is provided in a pair of liquid crystal panels that are rotated and opened relative to each other by a hinge module, when the liquid crystal panel is deployed, two display units are jointly connected to form a single large screen. There is a need for a hinge module suitable for an electronic device.

Embodiment of the present invention, in the dual-type liquid crystal panel that is rotated relative to the opening and closing by the hinge module, the hinge module compact structure can ensure the maximum display size when the liquid crystal panel is deployed, the hinge when the liquid crystal panel opening and closing The present invention relates to a portable electronic device equipped with a hinge module that facilitates semi-automatic operation of the module.

An embodiment of the present invention, by reducing the size and thickness of the hinge module to actively respond to the trend of slimming of electronic devices, because the hinge module is built in the liquid crystal panel is a portable electronic device equipped with a hinge module to increase the appearance beauty Related to the appliance.

Embodiment of the present invention relates to a portable electronic device equipped with a hinge module to ensure the durability by reducing the shaking of the fixed shaft and the flow shaft even when a large load is applied to the hinge module.

A portable electronic device having a hinge module according to an embodiment of the present invention includes a hinge module mounted at edges of a first liquid crystal panel, a second liquid crystal panel, and a fold edge of the first liquid crystal panel and the second liquid crystal panel, respectively. In the portable electronic device provided with a hinge module for connecting the first and second liquid crystal panel to be formed in the same plane or folded and overlapping in a relative rotation by the rotation,

The hinge module described above,

A housing mounted to the hinge coupler formed to face the folding portions of the first and second liquid crystal panels, respectively;

A first fixed shaft fixed to the first liquid crystal panel through the housing and to which the rolling cam is mounted;

A second fixed shaft accommodated in the housing and disposed in parallel with the first fixed shaft, to which the fixed coupling is mounted;

A flow shaft separated from the second fixed shaft and fixed to the second liquid crystal panel through the housing coaxially with the second fixed shaft;

A pair of cam gears mounted on one end of the first fixed shaft and the second fixed shaft, respectively, and rotating the first and second fixed shafts at a constant angular velocity;

A cam plate coupled to the first fixed shaft and the second fixed shaft so as to be movable in an axial direction and relatively rotating the first and second fixed shafts by a camp profile formed on a contact surface with the cam gear;

Oldham, which is mounted between the second fixed shaft and the flow shaft, moves the shaft apart from the axis of the second fixed shaft due to the cam motion of the rolling cam when the first and second fixed shafts rotate due to the relative rotation of the first and second liquid crystal panels. Couplings,

And pressing means for pressing and elastically supporting the cam gear and the cam plate so as to expand or maintain the first and second liquid crystal panels.

According to a preferred embodiment, the above-mentioned Oldham coupling,

Protruding portion is formed on one side is mounted to the flow shaft, and the first coupling is a cam cam and cam movement when rotating the first and second fixed shaft,

A first sliding groove in which the protrusion is slid is formed on one side, and the second sliding groove in which the protrusion is formed in one side of the fixed coupling includes a second coupling formed on the other side in a direction perpendicular to the first sliding groove. Is done.

It is mounted to the end of the first fixed shaft and the flow shaft described above, and comprises a forming spring to prevent the shaking of the first fixed shaft and the flow shaft during the relative rotation of the first and second liquid crystal panel.

Is formed on the inner side of the housing described above, when the flow shaft is spaced apart from the axis of the first fixed shaft due to the cam motion of the rolling cam according to the rotation of the first and second fixed shaft, due to the sliding of the first and second coupling A recess for receiving the protrusion.

The aforementioned pressing means,

A pair of compression coil springs respectively installed on the first and second fixed shafts to axially move the cam plate against the cam gear in a axial direction, and a first coupling from the rolling cam and the flow shaft from the first fixed shaft; It consists of a pair of retaining rings, each of which prevents breakaway.

The cloud cam mentioned above,

The first cam surface is in surface contact with the first contact surface of the first coupling to maintain the overlapped state of the first and second liquid crystal panels, and the first contact surface is perpendicular to the first contact surface to maintain the developed state of the first and second liquid crystal panels. And a second cam surface in surface contact with the second contact surface to be retained, and a coupling receiving groove accommodating the second coupling when the first and second liquid crystal panels are deployed or overlapped.

The housing described above,

When the first and second liquid crystal panel is deployed includes a slot formed in one side to accommodate the flow axis is moved from the shaft spaced apart from the axis of the second fixed shaft.

Portable electronic device equipped with a hinge module according to an embodiment of the present invention configured as described above has the following advantages.

Due to the small size of the hinge module that opens and closes the dual rotating liquid crystal panel, the size of the LCD screen can be secured to the maximum when the liquid crystal panel is deployed, and the semi-automatic operation of the hinge module can be smoothly opened and closed to improve product reliability. Can be.

In addition, due to the compact structure of the hinge module, it actively responds to the trend of slimming of the electronic device, and the built-in hinge module does not protrude from the liquid crystal panel, thereby increasing the appearance beauty.

In addition, even when a large load is applied to the hinge module, it is possible to secure durability by preventing breakage and damage by reducing the shaking of the fixed shaft and the flow shaft.

1 is a perspective view of a portable electronic device equipped with a hinge module according to an embodiment of the present invention;
2 is a perspective view of a hinge module in a portable electronic device having a hinge module according to an embodiment of the present invention;
3 is an exploded perspective view of the hinge module shown in FIG.
4 (a, b, c) is a view for explaining the operation of the hinge module in a portable electronic device equipped with a hinge module according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to illustrate the present invention in detail so that those skilled in the art can easily carry out the invention. And does not mean that the technical idea and scope of the invention are limited.

1 to 4 (a, b, c) is a portable electronic device equipped with a hinge module according to an embodiment of the present invention, a first liquid crystal panel (liquid crystal panel), a second liquid crystal panel, The portable electronic device includes a hinge module for connecting the first and second liquid crystal panels so that the first and second liquid crystal panels are formed to be coplanar or folded and overlapped by a hinge module mounted at edges of the first liquid crystal panel and the second liquid crystal panel, respectively. In the device,

The hinge module 10 described above,

A housing 15 mounted to the hinge coupling portions 13 and 14 formed to face the folding portions of the first and second liquid crystal panels 11 and 12, respectively;

A first fixed shaft 18 fixed to the first liquid crystal panel 11 through the coupling hole 16 of the housing 15 and to which the rolling cam 17 is mounted;

A second fixed shaft 20 accommodated in the housing 15 and disposed in parallel with the first fixed shaft 18, on which the fixed coupling 19 is mounted;

A flow shaft 21 formed separately from the second fixed shaft 20 and fixed to the second liquid crystal panel 12 through the housing 15 coaxially with the second fixed shaft 20;

A pair of cam gears mounted on one end of each of the first fixed shaft 18 and the second fixed shaft 20 to rotate the first and second fixed shafts 18 and 20 at a constant angular speed. (22,23)

It is formed by the camp profiles (24, 25) which are axially movable along the first fixed shaft (18) and the second fixed shaft (20) and formed on the mutually contact surfaces with the cam gears (22, 23). A cam plate 26 for relatively rotating the 1,2 fixed shafts 18 and 20,

Mounted between the second fixed shaft 20 and the flow shaft 21, when the first and second fixed shafts 18 and 20 are rotated due to the relative rotation of the first and second liquid crystal panels 11 and 12, Oldham's coupling 27 for moving the shaft 21 apart from the axis of the second fixed shaft 20 due to the cam motion of the rolling cam 17;

Pressing means for elastically supporting the cam gears 22 and 23 and the cam plate 26 to expand or maintain the first and second liquid crystal panels 11 and 12 is provided.

At this time, the above-mentioned Oldham coupling 27,

Protruding portion 28 is formed on one side is mounted to the flow shaft 21, the first coupling 29 and the cam cam 17 and the cam movement when the first and second fixed shafts 18 and 20 rotate;

The first sliding groove 30 in which the protrusion 28 slides is formed on one side, and the second sliding groove 32 in which the protrusion 31 formed in one side of the fixed coupling 19 slides is the first sliding groove. It comprises a second coupling 33 formed on the other side in a direction perpendicular to the (30).

The first fixed shaft 18 and the flow shaft 21 is mounted to the end of the first fixed shaft 18 and the flow shaft 21, and interlocked when the first and second liquid crystal panels 11 and 12 rotate relative to each other. Forming spring (34) to prevent the shaking of the.

It is formed on one side of the interior of the housing 15 described above, the flow shaft 21 is the first fixed shaft 18 due to the cam motion of the rolling cam 17 in accordance with the rotation of the first and second fixed shafts (18, 20) In the case of spaced apart from the axis of the (1), includes a recess 35 for receiving the projections due to the sliding of the first and second couplings (29, 33).

The aforementioned pressing means,

A pair of compression coil springs (locus springs) installed on the first and second fixed shafts 18 and 20 to press the cam plates 26 to the cam gears 22 and 23 so as to be movable in the axial direction, respectively. 36 and 37, and a pair of retaining rings 38 and 39 to prevent the first coupling 29 from leaving the cloud cam 17 and the flow shaft 21 from the first fixed shaft 18, respectively. )

The above-mentioned cloud cam 17,

A first cam surface 41 which is in surface contact with the first contact surface 40 of the first coupling 29 to maintain an overlapped state of the first and second liquid crystal panels 11 and 12, and the first and second liquid crystal panels A second cam surface 43 which is in surface contact with the second contact surface 42 which is perpendicular to the first contact surface 40 so as to maintain the deployed state of the first and second liquid crystal panels 11, 12. 12 is made up of a coupling receiving groove 44 for receiving the second coupling 33 when it is deployed or overlapped.

The housing 15 described above,

When the first and second liquid crystal panels 11 and 12 are deployed, a slot 45 is formed through one side to receive the flow shaft 21 which is axially moved apart from the axis of the second fixed shaft 20. ).

In the drawings, reference numeral 50 denotes a cover mounted to the opening of the housing 15.

Hereinafter, the opening and closing of a portable electronic device equipped with a hinge module according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The first and second liquid crystal panels 11 and 12 described above are coupled so as to be rotated and opened relative to each other by the hinge module 10. The display unit is formed on the first liquid crystal panel 11 and the second liquid crystal panel 12 is connected. An operation unit such as a keypad may be formed on the first display panel, but preferably, the first display unit 11a is formed on the first liquid crystal panel 11, and the second display unit 12a is formed on the second liquid crystal panel 12. In the form of

When the first and second liquid crystal panels 11 and 12 are expanded at an angle of 180 °, the first and second display parts 11a and 12a form the same plane, and thus, the first and second display parts 11a and 12a. Can be combined symmetrically to form one large display. The first and second display units 11a and 12a may have a form such as a touch screen, and may be used as information output means or information input means.

4 (a, b, c) shows the hinge module 10 when the first and second liquid crystal panels 11 and 12 are folded, the semi-automatic operation state based on the bending point, and the 180 ° angle is developed. It is a figure which shows each operation state.

In FIG. 4A, the above-described first liquid crystal panel 11 and the second liquid crystal panel 12 are operated by semi-automatic operation of the hinge module 10 (operated by the elastic force of the compression coil springs 36 and 37). It shows a case in which the overlapping state is completely folded in the thickness direction, wherein the angle formed by the first and second liquid crystal panels 11 and 12 is 0 °.

At this time, the cam gear is engaged to the cam plate 26 by the elastic force of the compression coil springs 36 and 37 which are respectively installed on the first fixed shaft 18 and the second fixed shaft 20 and are generated in the axial direction. It is pressed against the (22, 23) in the axial direction. That is, when the first and second liquid crystal piles 11 and 12 are rotated relative to each other, the first fixing is performed by the camp profiles 24 and 25 formed on the mutual contact surfaces of the cam gears 22 and 23 and the cam plate 26. When the rolling cam 17 mounted on the shaft 18 and the first coupling 29 mounted on the flow shaft 21 are out of the bending point, the first and second liquid crystal piles 11 and 12 are compressed coil springs. It is automatically folded by the elastic force of (36,37) (this is called "semi-automatic operation" of the hinge module 10).

In this case, the first and second liquid crystal panels 11 and 12 may maintain the overlapped state elastically and stably (that is, the compressed coil springs may be used to switch the overlapped state of the first and second liquid crystal panels 11 and 12). The superposition state remains stable except when the external force acts to exceed the elastic force of 36,37).

The second cam surface 43 formed on the outer surface of the rolling cam 17 mounted on the first fixed shaft 18 and the second formed on the outer surface of the first coupling 29 mounted on the flow shaft 21. The contact surface 42 is kept in close contact with each other. At this time, since the flow shaft 21 is located inside the slot 45 formed in the housing 15 (referring to a side closer to the first fixed shaft 18), the flow shaft 21 passes through the coupling hole 16 of the housing 15. The distance between the first fixed shaft 18 and the flow shaft 21 located in the slot 45 of the housing 15 can maintain "L1".

In FIG. 4 (b), the first and second liquid crystal panels 11 and 12 are folded at a 180 ° angle by semi-automatic operation of the hinge module 10, or the first and second liquid crystal panels 11, 12) is an intermediate step of switching to be folded by the semi-automatic operation of the hinge module 10 in the deployed state, wherein the first and second liquid crystal panels (11, 12) is 135 degrees .

In this case, the first liquid crystal panel 11 mounted on the first fixed shaft 18 and the second liquid crystal panel 12 mounted on the flow shaft 21 are rotated relative to each other to be deployed or folded. Therefore, the flow shaft 21 is spaced apart on the basis of the first fixed shaft 18 to move the shaft. That is, due to the cam motion of the rolling cam 17 mounted on the first fixed shaft 18 and the Oldham coupling 27 mounted on the flow shaft 21 so as to be in contact with the rolling cam 17, the flow shaft 21 is connected to the second fixed shaft ( Move the shaft apart on the axis of 20). At this time, the protrusion due to the cam movement of the first and second couplings 29 and 33 forming the oldham coupling 27 is accommodated in the recess 35 formed on the inner side of the housing 15.

The first fixed shaft 18 is rotated in the counterclockwise direction and at the same time the flow shaft 21 is rotated in the clockwise direction, the edge of the first and second cam surfaces 41 and 43 of the cloud cam 17 intersect. When the edge portion where the portion intersects the first and second contact surfaces 40 and 42 of the first coupling 29 is in contact (called a bending point), the first coupling 29 mounted to the flow shaft 21 is provided. Protruding portion (28) of the slide along the second sliding groove 32 of the second coupling 33 in a direction away from the first fixed shaft (18).

As a result, the flow shaft 21 is moved to the outside of the slot 45 formed in the housing 10 (referring to the side away from the first fixed shaft 18), so that the coupling hole 16 of the housing 15 is moved. The distance between the first fixed shaft 18 penetrating through the flow shaft 21 located in the slot 45 of the housing 15 can maintain "L2" (where L1 < L2).

FIG. 4 (c) shows a case in which the above-described first liquid crystal panel 11 and the second liquid crystal panel 12 are deployed at 180 ° by semi-automatic operation of the hinge module 10. In this case, the first and second liquid crystal panels 11 and 12 The angle formed by the liquid crystal panels 11 and 12 is 180 degrees. That is, since the first and second liquid crystal panels 11 and 12 are expanded at 180 ° to form the same plane, the size of the LCD screen may be as large as possible.

At this time, the first cam surface 41 formed on the outer surface of the rolling cam 17 mounted on the first fixed shaft 18 and the outer side surface of the first coupling 29 mounted on the flow shaft 21 are formed. The first contact surface 40 is maintained in close contact with each other. At this time, since the flow shaft 21 is located inside the slot 45 formed in the housing 15 (referring to a side closer to the first fixed shaft 18), the flow shaft 21 passes through the coupling hole 16 of the housing 15. The distance between the first fixed shaft 18 and the flow shaft 21 located in the slot 45 of the housing 15 can maintain "L3" (where L1 = L3).

At this time, except for the case where an external force exceeding the elastic force of the compression coil springs 36 and 37 is applied to switch the developed state of the first and second liquid crystal panels 11 and 12, the angle is developed at 180 °. I can keep a stable state.

As described above, the first and second liquid crystal panels 11 and 12 are switched to the unfolded state in the overlapped state by the semi-automatic operation of the hinge module 10, or the first and second liquid crystal panels 11 and 12 are When the transition from the deployed state to the overlapping state, by the forming spring 34 mounted on the first fixed shaft 18 and the flow shaft 21 can be kept firm by preventing their shaking. Thus, even when a relatively large load is applied to the first fixed shaft 18 and the flow shaft 21, durability can be secured by preventing breakage and damage.

As described above, according to a portable electronic device having a hinge module according to an embodiment of the present invention, the size of the liquid crystal panel may be increased when the liquid crystal panel is deployed due to the small size of the hinge module that opens and closes the dual type liquid crystal panel that is rotated relative to each other. You can get as much as you can. When opening and closing the liquid crystal panel, the semi-automatic operation of the hinge module is smoothly performed. Since the compact hinge module is embedded in the liquid crystal panel, it is advantageous for the slim design of electronic devices and the appearance can be increased. Even when a large load is applied to the hinge module, the shaking of the fixed shaft and the flow shaft can be reduced.

10; Hinge module
12; 2nd liquid crystal panel
14; The hinge-
16; Joiner
18; 1st fixed shaft
20; 2nd fixed shaft
22; Cam gear
24; Camp profile
26; Cam plate
28; projection part
30; First Sliding Groove
32; 2nd sliding groove
34; Forming spring
36; Compression Coil Springs
38; Fixed ring
40; First contact surface
42; Second contact surface
44; Coupling Receiving Groove

Claims (7)

The first and second liquid crystal panels are developed in a relative rotation by a first hinge panel, a second liquid crystal panel, and a pair of hinge modules mounted on both edges of the folding portions of the first liquid crystal panel and the second liquid crystal panel, respectively. In the portable electronic device having a hinge module for connecting to form the same plane or folded to overlap:
The hinge module 10,
A housing 15 opposite to the folding portions of the first and second liquid crystal panels 11 and 12, and mounted to the hinge coupling portions 13 and 14 formed to open the outside thereof;
A first fixed shaft 18 fixed to the first liquid crystal panel 11 through the housing 15 and on which the rolling cam 17 is mounted;
A second fixed shaft 20 accommodated in the housing 15 and disposed in parallel with the first fixed shaft 18, on which the fixed coupling 19 is mounted;
A flow shaft 21 formed separately from the second fixed shaft 20 and fixed to the second liquid crystal panel 12 through the housing 15 coaxially with the second fixed shaft 20; ,
A pair of cam gears 22 mounted on one end of the first fixed shaft 18 and the second fixed shaft 20, respectively, and rotating the first and second fixed shafts 18 and 20 at a constant angular speed. 23)
To the camp profiles (24, 25) are axially coupled along the first fixed shaft (18) and the second fixed shaft (20), the cam gears (22, 23) formed in contact with each other A cam plate 26 for relatively rotating the first and second fixed shafts 18 and 20 by
Mounted between the second fixed shaft 20 and the flow shaft 21, the cloud cam when the first and second fixed shafts (18, 20) rotate by the relative rotation of the first and second liquid crystal panels (11, 12) Oldham coupling 27 for eccentrically moving the flow shaft 21 in the direction perpendicular to the axis of the second fixed shaft 20 due to the cam motion of (17),
When the first and second liquid crystal panels 11 and 12 are deployed, the cloud cam 17 and the Oldham coupling 27 are eccentrically moved in a direction perpendicular to an axis of the second fixed shaft 20 by the cloud cam 17 and the Oldham coupling 27. Slot 45 is formed through the one side of the housing to guide the flow shaft 21,
A pair of pressurizing members movably press the cam gears 22 and 23 and the cam plate 26 in the axial direction so as to expand or maintain the first and second liquid crystal panels 11 and 12. Compression coil springs (36,37),
And a pair of retaining rings 38 and 39 for preventing the rolling cam 17 and the first coupling 29 from being separated from the first fixed shaft 18 and the flow shaft 21, respectively. Portable electronic device provided with a hinge module. The method of claim 1, wherein the Oldham coupling 27,
Protruding portion 28 is formed on one side in the vertical direction in the axial direction is mounted to the flow shaft 21, the first coupling cam cam movement and the cam when the first and second fixed shaft rotation;
The first sliding groove 30 is formed on one side of the protrusion 28 is slid in the vertical direction with respect to the axial direction, the second sliding sliding the protrusion 31 formed on one side of the fixed coupling 19 Portable electronic device with a hinge module, characterized in that the groove (32) comprises a second coupling (33) formed on the other side in the direction perpendicular to the first sliding groove (30). According to claim 1, wherein the first fixed shaft and the flow shaft is mounted to the end, the adjacent to the slot and the relative rotation of the first and second liquid crystal panel eccentrically moved in a direction perpendicular to the first fixed shaft Portable electronic device provided with a hinge module, characterized in that it comprises a forming spring to prevent the shaking of the flow shaft. According to claim 1, It is formed on the inner side of the housing 15, the flow shaft 21 is due to the cam motion of the rolling cam 17 in accordance with the rotation of the first and second fixed shaft (18, 20) When the spaced apart from the axis of the first fixed shaft 18 in the lateral direction, it characterized in that it comprises a recess 35 for receiving the projections 28 due to the sliding of the first and second couplings (29, 33) Portable electronic device provided with a hinge module. delete The cloud cam according to any one of claims 1 to 4,
A first cam surface 41 which is in surface contact with the first contact surface 40 of the first coupling 29 so as to maintain an overlapped state of the first and second liquid crystal panels 11 and 12; A second cam surface 43 which is in surface contact with the second contact surface 42 which maintains a direction perpendicular to the first contact surface 40 so as to maintain an expanded state of the liquid crystal panels 11 and 12; 2 is a portable electronic device equipped with a hinge module, characterized in that the liquid crystal panel (11, 12) is formed of a coupling receiving groove (44) for accommodating the second coupling (33) when deployed or overlapped. delete

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