SUPPORT FOR CHAIR

Abstract

A support for a chair includes: a base plate (110); support plates (120, 130), of which one sides are rotatably coupled to the base plate (110); and a first hinge (150) which connects the base plate (110) and the support plates (120, 130) to be rotatable, wherein the base plate (110) is supported by a seat portion (11) of a chair (10) and the support plates (120, 130) are supported by a back portion (12) of the chair (10) while the base plate (110) and the support plates (120, 130) are unfolded at a first maximum unfolding angle (θ1m) and support the upper body of a user.

Description

TECHNICAL FIELD

The present disclosure relates to a support for a chair, particularly, a support for a chair that is mounted on a chair in use.

TECHNICAL FIELD

In generally, a chair, which is a tool that is used for a person to sit, is composed of a seat that supports the hips when a user sits, and a seat back that is disposed at the rear of the seat and supports the waist of a user. In some cases, legs are additionally provided under the seat or a neck support is additionally provided, and they are configured in various ways in accordance with the use purposes, for example, the legs are fixed or are provided with casters at the lower end to be easily moved and the neck support supports the head of a user.

Various waist support technologies for supporting the waist when a user sits on such a chair have been disclosed.

For example, there is a waist support that protrudes at both sides with a predetermined depth at the center of a seat back so that the waist is seated when a user leans the back against the seat back.

Since such a waist support supports only the waist of a sitting user, it has limitation in terms of comfort or convenience and has technological limitation that it cannot completely remove a load that is applied to a waist.

Meanwhile, airplanes, long-distance buses (expressway buses and cross-country buses), express trains of transportation are being increasingly frequently used due to diversification of life, work, etc. of modern people.

Since the reclining angles of the seat backs of the seats in airplanes, long-distance buses (expressway buses and cross-country buses), express trains are limited, when a user sits for a long time, a large load is applied to the waist, the sitting comfort is poor, and there is also inconvenience.

Further, when a user moves a long distance in the seat in an airplane, a bus, a car, an express trains, etc., the load of the upper body is transmitted to the hips, so there is a problem that the sitter feels pain due to pressure on the hips by such transmission of a load.

Disclosure

Technical Problem

The present disclosure has been made in an effort to solve the problems described above in the related art and an objective of the support for a chair according to the present disclosure is to provide a support for a chair that,

first, provide a sitting comfort as if a user obliquely lies on a bed even when sitting on a chair, thereby being able to provide excellent sitting comfort and comfort,

second, can remarkably reduce a load that is applied to the waist or prevent a load from being applied to the waist when sitting,

third, can provide sitting comfort like obliquely lying when sitting for a long time in a seat with a small gap, particularly, in an airplane, a long-distance bus, a car, an express train, etc., thereby being able to provide excellent ease and comfort,

fourth, can remove a pain due to pressure on the hips by the load of the upper body transmitted to the hips when moving in a seat in an airplane, a bus, a car, an express train, etc, and

fifth, can minimize the volume and reduce the thickness because it can be folded after used, thereby being able to remarkably improve convenience for carrying and keeping the product.

Technical Solution

In order to achieve the objective of the present disclosure, a support for a chair (a back and waist support for a chair), which is a support for a chair that is mounted on a chair including a seat and a seat back to support the rear of the upper body of a user, includes: a base plate of which the lower end is supported on the seat of the chair; a support plate of which a first side is rotatably coupled to the base plate and a second side is supported on the seat back, and that supports the rear of the upper body of a user in close contact with the rear of the upper body of the user; and a first hinge that is connected to the upper end of the base plate and the first side of the support plate, thereby rotatably connecting the base plate and the support plate, in which the base plate and the support plate are folded or unfolded by the first hinge, and when the base plate and the support plate are unfolded at a first maximum unfolding angle with the base plate supported on the seat of the chair and the support plate supported on the seat back of the chair and the weight of the upper body of a user is applied, the base plate and the support plate maintain the first maximum unfolding angle, thereby supporting the upper body of the user.

Advantageous Effects

A support for a chair having this configuration according to the present disclosure has the following effects.

First, there is an effect that it is possible to provide a sitting comfort as if a user obliquely lies on a bed even when sitting on a chair, thereby being able to provide excellent sitting comfort and comfort.

Second, there is another effect that it is possible to remarkably reduce a load that is applied to the waist, and in some case, it is possible to prevent a load from being applied to the waist when sitting.

Third, there is an effect that it is possible to provide sitting comfort like obliquely lying when sitting for a long time in a seat with a small gap, particularly, in an airplane, a long-distance bus, a car, an express train, etc., thereby being able to provide excellent ease and comfort.

Fourth, there is an effect that it is possible to remove a pain due to pressure on the hips by the load of the upper body transmitted to the hips when moving in a seat in an airplane, a bus, a car, an express train, etc.

Fifth, there is an effect that it is possible to minimize the volume and reduce the thickness because it can be folded after used, thereby being able to remarkably improve convenience for carrying and keeping the product.

DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view of a support 100 for a chair according to an embodiment of the present disclosure and a state view in which the support is mounted.

FIG. 2 is an exemplary view of a use state in which a user uses the support 100 for a chair according to an embodiment of the present disclosure.

FIG. 3 is an exemplary view of a use state when a second support plate 130 is folded and used as a two-stage support 100 in the support 100 for a chair according to an embodiment of the present disclosure.

FIG. 4 is a perspective view seen from the inside of the support 100 for a chair according to an embodiment of the present disclosure.

FIG. 5 is an exploded perspective view of FIG. 4.

FIG. 6 is an operation view of the support 100 for a chair according to an embodiment of the present disclosure.

FIG. 7 is an operation view in which a base plate 110 is folded in the support 100 for a chair according to an embodiment of the present disclosure.

FIG. 8 is an operation view in which the second support plate 130 is folded with the base plate 110 folded in the support 100 for a chair according to an embodiment of the present disclosure.

FIG. 9 is an exemplary view of a use state when a support plate is configured one support plate 120 and the support 100 for a chair according to an embodiment of the present disclosure is configured as a two-stage support as a modified example.

MODE FOR INVENTION

Next, a preferred embodiment of a support for a chair of the present disclosure is described in detail with reference to the accompanying drawings.

The support for a chair of the present disclosure is technically a waist support for a chair, etc.

The “outside” of the support 100 described in the specification is a direction facing a user and the “inside” of the support 100 is a direction facing a chair.

A support 100 for a chair (a back and waist support 100 for a chair) according to an embodiment of the present disclosure, which is a support 100 for a chair that is mounted on a chair 10 including a seat 11 and a seat back 12 to support the rear (the back, the waist, or the back and waist) of the upper body of a user, includes: a base plate 110 of which the lower end is supported on the seat 11 of the chair 10; a support plate 120, 130 of which a first side (a lower end when mounted on a chair) is rotatably coupled to the base plate 110 and a second side (an upper end when mounted on a chair) is supported on the seat back 12, and that supports the rear (in detail, the back and the waist) of the upper body of a user in close contact with the rear (in detail, the back and the waist) of the upper body of the user; and a first hinge 150 that is connected to the upper end 111 of the base plate 110 and the first side (lower end) of the support plate 120, 130, thereby rotatably connecting the base plate 110 and the support plate 120, 130.

Further, the first plate 110 and the support plate 120, 130 are folded or unfolded by the first hinge 150. When the base plate 110 and the support plate 120, 130 are folded, they can be fully folded inward such that the insides come in contact with each other. When the base plate 110 and the support plate 120, 130 are unfolded at a first maximum unfolding angle θ1 with the base plate 110 supported on the seat 11 of the chair 10 and the support plate 120, 130 supported on the seat back 12 of the chair 10 and the weight of the upper body of a user is applied, the base plate 110 and the support plate 120, 130 maintain the first maximum unfolding angle θ1, that is, are not folded at an angle larger than the first maximum unfolding angle θ1, thereby supporting the upper body of the user.

When a user leans on the support 100 with the hips on the seat 11, the back and waist of the user are both supported, and particularly, the back is supported much, whereby it is possible to reduce or completely remove the load applied to the waist when the user sits and it is possible to achieve an effect that the user is like obliquely lying on a bed while sitting on a chair.

In particular, when a user sits in a seat with a small gap in an airplane, a long-distance bus, a car, an express train, etc., the user can obliquely sit and lie, whereby there is an advantage that ease and comfort can be provided and it is possible to reduce or remove a load that is applied to the waist when sitting. Further, this effect may be increased in a chair 10 with a neck support 13.

Further, since the support 100 can be folded and unfolded, it is possible to fold the base plate 110 on the support plate 120, 130 after using the support 100, so there is an advantage that it is possible to reduce the volume and thickness and easily and conveniently carry and stow the support.

In particular, since the base plate 110 and the support plate 120, 130 are thin plates, they can be kept in a handbag or a backpack, so convenience for keeping and carrying is further improved.

It is preferable that the base plate 110 and the support plate 120, 130 are made of a synthetic resin material. Accordingly, it is possible to reduce the weight of the product, so there is an advantage that portability is further improved.

Since the support 100 is light, has a small volume, and is thin, it is possible to carry and move the support 100 in a handbag or a backpack and then simply take out and use the support 100 when sitting in an airplane, a long-distance bus, an express train, etc., so convenience of use is remarkably improved.

The first maximum unfolding angle θ1m is an obtuse angle (an angle larger than 90° and smaller than 180°).

Preferably, the first maximum unfolding angle θ1m is an obtuse angle of 120˜160°. More preferably, an unfolding angle of 130˜150° is formed. More preferably, an unfolding angle of 135° is formed.

The unfolding operation is stopped by contact of the upper end 111 of the base plate 110 and the first side (lower end) of the support plate 120, 130, whereby the first maximum unfolding angle θ1m is maintained.

Further, the support further includes a stopper 141 protruding from the upper end 111 of the base plate 110 or the first side (the lower end in the drawings) of the support plate 120, 130 to set the first maximum unfolding angle θ1m between the base plate 110 and the support plate 120, 130.

Further, when the stopper 141 is formed at the base plate 110, the support plate 120, 130 is stopped at the stopper 141, whereby the first maximum unfolding angle θ1m is formed. When the stopper 141 is formed at the support plate 120, 130, the base plate 110 is stopped at the stopper 141, whereby the first maximum unfolding angle θ1m is formed.

Although an example in which the stopper 141 is formed at the upper end 111 of the base plate 110 in the embodiment shown in the figures, the present disclosure is not limited thereto and it is apparent that the case in which the stopper is formed at the lower end of the support plate 120, 130 (in detail, the lower end 122 of a first support plate 120) is also included in an embodiment of the present disclosure.

The stopper 141 integrally protrudes from the upper end 111 of the base plate 110 toward the support plate 120, 13.

Accordingly, since the stopper 141 integrally protrudes from the upper end 111 of the base plate 110, depending on which view is selected, it may be considered that the upper end 111 of the base plate 110 protrudes and the protruding upper end 111 of the base plate 110 and the lower end 122 of the support plate 120, 130 (or the first support plate 120) are stopped by coming in contact with each other, whereby the first maximum unfolding angle θ1m is formed.

When the first support plate 120 and the second support plate 130 are unfolded, the upper end of the first support plate 120 and the lower end 132 of the second support plate 130 come in contact with each other, whereby the unfolding operation is stopped. Accordingly, the first support plate 120 and the second support plate 130 maintain a maximum unfolded state, that is, a second maximum unfolding angle θ2m.

Accordingly, there is an advantage that the second maximum unfolding angle θ2m is set and maintained by the configuration of the two support plates 120 and 130 themselves.

As shown in FIGS. 1 to 8, the support plate 120, 130 is composed of a plurality of support plates 120 and 130 that are rotatably connected to each other by one or more second hinges 160.

The first side (lower end) of any one of the plurality of support plates 120 and 130 is rotatably coupled to the base plate 110, the second side (upper end in the figures) of the other one of the plurality of support plates 120 and 130 is supported on the seat back 12, and the plurality of support plates 120 and 130 are unfolded and support the rear of the upper body of a user in close contact with the rear (waist and back) of the upper body of the user.

As shown in FIGS. 1 to 8, in the support 100 for a chair according to an embodiment of the present disclosure (referred to as a three-stage support 100 in the specification), the support plate 120, 130 includes a first support plate 120 rotatably connected to the base plate 110 by the first hinge 150 and a second support plate 130 rotatably connected to the first support plate 130 by the second hinge 160.

In this configuration, the first side (lower end 122) of the first support plate 120 is rotatably coupled to the base plate 110, the second side (upper end) of the second support plate 130 is supported on the seat back 12 of the chair 10, the first and second support plates 120 and 130 are connected by the second hinge 160 to be able to be unfolded and folded with respect to each other, and the first and second support plates 120 and 130 are unfolded and support the rear of the body of a user in close contact with the rear (waist and back) of the upper body of the user. The base plate 110 and the first support plate 120 are folded or unfolded by the first hinge 150. The base plate 110 and the first support plate 120 are unfolded at the first maximum unfolding angle θ1m, whereby the base plate 110 is supported on the seat 11 of the chair 10. When the weight of the upper body of a user is applied to the first and second support plates 120 and 130 with the first and second support plates 120 and 130 unfolded and the second support plate 130 supported on the seat back 12 of the chair 10, the base plate 110 and the first support plate 120 maintain the first maximum unfolding angle θ1m (i.e. are not unfolded at an angle larger than the first maximum unfolding angle θ1), and the first support plate 120 and the second support plate 130 maintain the second maximum unfolding angle θ2m, thereby supporting the upper body of the user.

Even though a plurality of support plates 120 and 130 are provided, as described above, the maximum unfolding angle θ1m is an obtuse angle (angle larger than 90° and smaller than 180°).

The maximum unfolding angle θ1m is an obtuse angle of 120˜160°, preferably, is an unfolding angle of 130˜150°, and more preferably, an unfolding angle of 135°. This is because stable and easy sitting comfort is provided.

The support 100 further includes a stopper 141 protruding from the upper end 111 of the base plate 110 or the lower end 122 of the first support plate 120 to set the first maximum unfolding angle θ1m between the base plate 110 and the first support plate 120, which was described above.

When the stopper 141 is formed at the base plate 110, the first support plate 120 is stopped at the stopper 141, thereby forming the first maximum unfolding angle θ1m, and when the stopper 141 is formed at the first support plate 120, the base plate 110 is stopped at the stopper 141, thereby forming the first maximum unfolding angle θ1m, which was also described above.

In the support 100 for a chair according to an embodiment of the present disclosure, the base plate 110 and the second support plate 130 can be folded to be sequentially stacked with the first support plate 120 therebetween that is positioned at the center of three plates 110, 120 and 130. Accordingly, there is an advantage that it is possible to minimize the three-step support 100 and reduce the thickness thereof.

When the first support plate 120 and the second support plate 130 are unfolded, they are unfolded such that the outer surfaces 120b and 130b of the first and second support plates 120 and 130, respectively, form the same plane.

Accordingly, the first and second support plates 120 and 130 that support the back of a user are flat, so the user can more comfortably lean.

In this case, the second maximum unfolding angle θ2m of the first support plate 120 and the second support plate 130 is 180°.

When the first support plate 120 and the second support plate 130 are unfolded, the upper end of the first support plate 120 and the lower end 132 of the second support plate 130 come in contact with each other, whereby the unfolding operation is stopped. Accordingly, the first support plate 120 and the second support plate 130 maintain a maximum unfolded state, that is, a second maximum unfolding angle θ2m.

Accordingly, there is an advantage that the second maximum unfolding angle θ2m is set and maintained by the configuration of the two support plates 120 and 130 themselves.

Further, the base plate 110 is folded with respect to the first support plate 120 such that the inner surface 120a of the first support plate 120 and the inner surface 110a of the base plate 110 come in close contact with each other or face each other, and then the second support plate 130 is folded with respect to the first support plate 120 such that the inner surface 130a of the second support plate 130 and the outer surface of the base plate 110 come in close contact with each other or face each other, whereby the first support plate 120, the base plate 110, and the second support plate 130 are sequentially stacked and folded in that order.

Further, base reinforcement ribs 115 are formed on the inner surface 110a of the base plate 110, first reinforcement ribs 125 are formed on the inner surface 120a of the first support plate 120, and second reinforcement ribs 135 are formed on the inner surface 130a of the second support plate 130.

An edge 114 protrudes inward along the edge of the base plate 110, a pair of protruding edges 124 protrudes along the left and right edges of the first support plate 120, and a pair of second protruding edges 134 protrude along the left and right edges of the second support plate 130. Further, the base plate 110 is folded with respect to the second support plate 130 such that the edge 114 is positioned inside the first protruding edge 124, and the second support plate 130 is folded with respect to the first support plate 120 such that the second protruding edge 134 covers the base plate 110 in close contact with the first protruding edge 124 with the base plate 110 folded. Accordingly, the first support plate 120, the base plate 110, and the second support plate 130 are sequentially stacked and folded in that order.

Further, the edge 114 of the base plate 110 is composed of a side edge 114a protruding along the left and right edges and a lower end edge 114b protruding along the edge of the lower end of the base plate 110, and reinforcement rib seat grooves 116 for accommodating the first reinforcement ribs 125 are concavely formed at the lower end edge 114b.

The first hinge 150 includes a first hinge bottom bracket 151 formed at the upper end of the base plate 110, a first hinge top bracket 152 formed at the lower end 122 of the first support plate 120, and a first hinge pin 153 connecting the first hinge bottom bracket 151 and the first hinge top bracket 152. The first hinge may further include a first nut 154 that is thread-fastened to the first hinge pin 153.

The second hinge 160 includes a second hinge bottom bracket 161 formed at the upper end of the first support plate 120, a second hinge top bracket 162 formed at the lower end 132 of the second support plate 130, and a second hinge pin 163 connecting the second hinge bottom bracket 161 and the second hinge top bracket 162. The second hinge pin 153 may further include a second nut 164 that is thread-fastened to the second hinge pin 153.

Meanwhile, as shown in FIG. 9, according to a modified embodiment of the support 100 for a chair according to an embodiment of the present disclosure, it ma be composed of two plates, that is, the base plate 110 and the first support plate 120 (which is referred to as a two-step support in the specification), and of course, this case is also included in the technical range of the present disclosure.

Any of the two-stage support 100 and the three-stage support 100 are included in the technical range of the present disclosure. The two-stage support 100 and the three-stage support 100 just selected and used by a user on the basis of the size of a chair or the size of the user's body.

Meanwhile, the use example shown in FIG. 3 is an example in which a three-stage support 100 is composed of three plates, that is, the base plate 110 and the first and second support plates 120 and 130 and only the base plate 110 and the first support plate 120 are used as the support 100 by folding the second support plate 130.

It was exemplified that the support plate 120, 130 is composed of two support plates 120 and 130 in the support 100 for a chair according to an embodiment of the present disclosure, but the present disclosure is not limited thereto, and the case in which the support is composed of three support plates or four support plates is included in the technical range of the present disclosure, and all cases are included in the technical range of the present disclosure regardless of the number of sections.

Next, the operation of the support 100 for a chair having the above configuration according to an embodiment of the present disclosure is described.

First, the operation of folding and using is described.

The support 100 is unfolded by maximally unfolding the base plate 110 at the first maximum unfolding angle θ1m and folding the second support plate 130 at the second maximum unfolding angle θ2m.

The lower end of the base plate 110 is supported on the seat 11 and the upper end of the second support plate 130 is supported on the seat back 12, whereby the support 100 is mounted on the chair 10.

As shown in FIG. 2, when a user obliquely lies such that the waist is positioned substantially at the boundary between the base plate 110 and the first support plate 120 and the back is positioned at the first and second support plates 120 and 130, the user feels very comfortable and easy like lying on a bed with a back seat erected.

In this case, a partial load F1 of the weight of the user is applied substantially at the boundary between the base plate 110 and the first support plate 120, but even if the load F1 is applied, the first maximum unfolding angle θ1m can be maintained. Further, another load F2 of the user is applied substantially at the boundary between the first support plate 120 and the second support plate 130, but even if the load F2 is applied, the second maximum unfolding angle θ2m can be maintained.

Reference numeral θ1 is a first unfolding angle θ1 that is the angle made between the base plate 110 and the first support plate 120, and reference numeral θ2 is a second unfolding angle θ2 that is the angle made between the first support plate 120 and the second support plate 130.

Next, a folding operation of keeping or carrying is described.

First, the base plate 110 is folded (FIG. 7(b)) in the state in which the base plate 110 and the second support plate 130 are both unfolded (FIG. 7(a)). As shown in FIG. 7(b), the base plate 110 is fully inserted between the first protruding edges 124 at the right side inside the first support plate 120.

Next, the second support plate 130 is folded with the base plate 110 folded (FIG. 8(a)), whereby the support is fully folded (FIG. 8(b)). As shown in FIG. 8(b), when the second support plate 130 is folded, the second protruding edge 134 and the first protruding edge 124 are in contact with each other, whereby a neat externals shape is formed.

A preferred embodiment according to the present disclosure was described above, but it is apparent to those skilled in the art that the present disclosure may be implemented in other concrete ways without changing the spirit or necessary features of the present disclosure other than the embodiment described above. Accordingly, it should be understood that the embodiment described above is not limitative, but exemplary.

The scope of the present disclosure is defined by the following claims rather than the above detailed description, and all of changes and modifications obtained from the meaning and range of claims and equivalent concepts should be construed as being included in the scope of the present disclosure.

Claims

1. A support (100) for a chair that is mounted on a chair (10) including a seat (11) and a seat back (12) to support the back of a user, the support (100) comprising: a base plate (110) of which a lower end is supported on the seat (11) of the chair (10);a support plate (120, 130) of which a first side is rotatably coupled to the base plate (110) and a second side is supported on the seat back (12), and that supports the rear of the upper body of a user in close contact with the rear of the upper body of the user; anda first hinge (150) rotatably connecting the base plate (110) and the support plate (120, 130),wherein the base plate (110) and the support plate (120, 130) are folded or unfolded by the first hinge (150), and when the base plate (110) and the support plate (120, 130) are unfolded at a first maximum unfolding angle (θ1m) with the base plate (110) supported on the seat (11) of the chair (10) and the support plate (120, 130) supported on the seat back (12) of the chair (10) and the weight of the upper body of a user is applied, the base plate (110) and the support plate (120, 130) maintain the first maximum unfolding angle (θ1m), thereby supporting the upper body of the user.

2. The support of claim 1, wherein an upper end (111) of the base plate (110) and the first side of the support plate (120, 130) are stopped by coming in contact with each other, whereby the first maximum unfolding angle (θ1m) is maintained.

3. The support of claim 1, wherein the support plate (120, 130) is composed of a plurality of support plates (120) and (130) that are rotatably connected to each other by one or more second hinges (160), and the first side of any one of the plurality of support plates (120) and (130) is rotatably coupled to the base plate (110), the second side of the other one of the plurality of support plates (120) and (130) is supported on the seat back (12), and the plurality of support plates (120) and (130) are unfolded and support the rear of the upper body of a user in close contact with the rear of the upper body of the user.

4. The support of claim 3, wherein the support plates (120) and (130) include: a first support plate (120) rotatably connected to the base plate (110) by the first hinge (150); anda second support plate (130) rotatably connected to the first support plate (130) by the second hinge (160),the first side of the first support plate (120) is rotatably coupled to the base plate (110), and the second side of the second support plate (130) is supported on the seat back (12) of the chair (10),the first and second support plates (120) and (130) are connected by the second hinge (160) to be able to be unfolded and folded with respect to each other,the first and second support plates (120) and (130) are unfolded and support the rear of the body of a user in close contact with the rear of the upper body of the user,the base plate (110) and the first support plate (120) are folded or unfolded by the first hinge (150),the base plate (110) and the first support plate (120) are unfolded at the first maximum unfolding angle (θ1m), whereby the base plate (110) is supported on the seat (11) of the chair (10), andwhen the weight of the upper body of a user is applied to the first and second support plates (120) and (130) with the first and second support plates (120) and (130) unfolded and the second support plate (130) supported on the seat back (12) of the chair (10), the base plate (110) and the first support plate (120) maintain the first maximum unfolding angle (θ1m), and the first support plate (120) and the second support plate (130) maintain a second maximum unfolding angle (θ2m), thereby supporting the upper body of the user.

5. The support of claim 4, wherein the base plate (110) and the second support plate (130) can be folded to be sequentially stacked with the first support plate (120) therebetween that is positioned at a center.

6. The support of claim 2, further comprising a stopper (141) protruding from the upper end (111) of the base plate (110) or the first side of the support plate (120, 130) to set the first maximum unfolding angle (θ1m) between the base plate (110) and the support plate (120, 130).

7. The support of claim 6, wherein when the stopper (141) is formed at the base plate (110), the support plate (120, 130) is stopped at the stopper (141), whereby the first maximum unfolding angle (θ1m) is formed, and when the stopper (141) is formed at the support plate (120, 130), the base plate (110) is stopped at the stopper (141), whereby the first maximum unfolding angle (θ1m) is formed.

8. The support of claim 6, wherein when the first support plate (120) and the second support plate (130) are unfolded, the first and second support plates are unfolded such that outer surfaces (120b) and (130b) of the first and second support plates (120) and (130), respectively, form the same plane.

9. The support of claim 4, wherein base reinforcement ribs (115) are formed on an inner surface (110a) of the base plate (110), first reinforcement ribs (125) are formed on an inner surface (120a) of the first support plate (120), andsecond reinforcement ribs (135) are formed on an inner surface (130a) of the second support plate (130).

10. The support of claim 4, wherein an edge (114) protrudes inward along an edge of the base plate (110), a pair of protruding edges (124) protrudes along left and right edges of the first support plate (120),a pair of protruding edges (134) protrudes along left and right edges of the second support plate (130), and the base plate (110) is folded with respect to the second support plate (130) such that the edge (114) is positioned inside the first protruding edge (124), and the second support plate (130) is folded with respect to the first support plate (120) such that the second protruding edge (134) covers the base plate (110) in close contact with the first protruding edge (124) with the base plate (110) folded, whereby the first support plate (120), the base plate (110), and the second support plate (130) are sequentially stacked and folded in that order.