WO2021187832A1

WO2021187832A1 - Support for chair

Info

Publication number: WO2021187832A1
Application number: PCT/KR2021/003167
Authority: WO
Inventors: 황종성
Original assignee: 황종성
Priority date: 2020-03-19
Filing date: 2021-03-15
Publication date: 2021-09-23
Also published as: KR20210117588A; CN115243585A; KR102381128B1; US20230120809A1

Abstract

The present invention relates to a support for a chair, the support comprising: 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, and accordingly, there is an advantage of providing excellent seating feeling and comfort.

Description

chair pedestal

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair pedestal, and more particularly, to a chair pedestal used by being placed on a chair.

In general, a chair is a device used for a person to sit on, and a seat for supporting the buttocks when seated and a backrest provided at the rear of the seat to support the user's waist are configured, and in some cases, legs or legs under the seat The neckrest is additionally configured, the legs are fixed or casters are provided at the bottom to facilitate movement, and the neckrest is configured in various ways depending on the purpose of use, such as supporting the user's head.

In such a chair, various lumbar support technologies for supporting the lower back when the user sits on the chair are disclosed.

For example, there is a technology such as a lumbar support so that the waist is seated when the user leans on the back by protruding on both sides to have a certain depth in the center of the backrest.

Since such a lumbar support supports only the waist of a seated user, there is a limit in comfort or convenience, and there is also a technical limit in that it cannot completely remove the load acting on the waist.

On the other hand, the frequency of using airplanes, long-distance buses (express buses, intercity buses), and high-speed trains among transportation means is increasing due to the diversification of modern people's lives and work.

Chairs provided on airplanes, long-distance buses (express buses, intercity buses), and high-speed trains have limitations in the size of the angle at which the backrest is reclined. .

In addition, when sitting in a chair provided in an airplane, bus, car, high-speed train, etc., and moving for a long distance, the load of the upper body is transferred to the hip, and there is a problem in that the seated person suffers from the pressure of the buttocks due to the transfer of the load.

The present invention was created to solve the problems of the prior art as described above, and the object of the chair pedestal according to the present invention is,

First, it is possible to provide a feeling of sitting as if lying at an angle on a bed just by sitting in a chair, and thus to provide superior seating and comfort;

Second, when seated, the load acting on the waist should be significantly reduced or the load acting on the waist should not be received at all,

Third, especially in the case of sitting for a long time in a narrow spaced chair such as an airplane, a long-distance bus, a car, or a high-speed train, it is possible to provide excellent comfort and comfort by providing a sitting feeling lying at an angle,

Fourth, when sitting on a chair provided in an airplane, bus, car, high-speed train, etc., when moving for a long distance, it is possible to remove the pain caused by the pressure of the buttocks caused by the load of the upper body being transferred to the buttocks,

Fifth, it is to provide a chair support that is suitable to be foldable after using the support so that the volume can be minimized and the thickness can be reduced, and thus the portability and storage of the product can be significantly improved.

The present inventor's chair pedestal (back and lumbar support for a chair) for achieving the above object is placed on a chair comprising a seat part and a backrest part to support the user's back as a chair pedestal. , a base plate whose lower end is supported on the seat part of the chair, one side is rotatably coupled to the base plate, the other side is supported on the backrest part, and is in close contact with the user's upper body back to support the user's upper body back It is configured to include a support plate and a first hinge rotatably connecting the base plate and the support plate, wherein the base plate and the support plate are folded or unfolded by the first hinge, and the base plate and the support plate are first 1 When the user's upper body weight acts in a state in which the base plate is supported on the seat part of the chair and the support plate is supported on the backrest part of the chair in a state of being unfolded at the maximum unfolding angle, the base plate and the support plate are first It is characterized in that by maintaining the maximum unfolding angle, the upper body of the user is supported.

The seat pedestal of the present invention having the above configuration has the following effects.

First, there is an effect of providing a feeling of sitting as if lying on a bed at an angle just by sitting on a chair, and as a result, there is an effect of providing superior seating and comfort.

Second, it is possible to significantly reduce the load acting on the waist when sitting, and in some cases, there is an effect that the load itself does not receive the load itself at all.

Third, especially in the case of sitting for a long time in a chair with a narrow space such as an airplane, a long-distance bus, a car, a high-speed train, etc., it is possible to provide a sitting feeling lying at an angle, thereby providing excellent comfort and comfort.

Fourth, there is an effect that can remove the pain caused by the pressure of the buttocks caused by the load of the upper body being transferred to the buttocks during long-distance movement while sitting on a chair provided in an airplane, bus, automobile, high-speed train, etc.

Fifth, the pedestal can be folded after use to minimize the volume and reduce the thickness, and as a result, the portability and storability of the product can be significantly improved.

1 is a perspective view of a pedestal 100 for a chair according to an embodiment of the present invention and a state diagram mounted on the chair.

Figure 2 is an exemplary view of the use state in which the user is using the chair pedestal 100 according to an embodiment of the present invention.

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

Figure 4 is a perspective view viewed from the inner surface of the pedestal 100 for a chair according to an embodiment of the present invention.

5 is an exploded perspective view of FIG. 4 ;

6 is an operation diagram of the pedestal 100 for a chair according to an embodiment of the present invention.

7 is an operation diagram in which the base plate 110 is folded in the pedestal 100 for a chair according to an embodiment of the present invention.

8 is an operation diagram in which the second support plate 130 is folded in a state in which the base plate 110 is folded in the pedestal 100 for a chair according to an embodiment of the present invention.

9 is a modified example of the pedestal 100 for a chair according to an embodiment of the present invention, an example of a state of use when the support plate is configured as a two-stage pedestal when only one support plate 120 is configured. It is also

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the pedestal for a chair according to the present invention will be described in detail.

The chair support according to the present invention is strictly a chair back and waist support.

The "outside" of the pedestal 100 described herein is a direction facing the user, and the "inside" of the pedestal 100 is a direction facing the chair.

A chair support 100 (a chair back and a back support 100) according to an embodiment of the present invention is a chair 10 configured to include a seat portion 11 and a back support portion 12 . A chair pedestal 100 for supporting the user's upper body back (back, waist, or back and waist) by being placed on the , one side (the lower end as a standard when mounted on a chair) is rotatably coupled to the base plate 110 , and the other side (the upper end as a standard when placed on a chair) is supported by the backrest 12 . The

support plates

120 and 130 that are in close contact with the back of the user's upper body (specifically, the back, the waist) and support the back of the user's upper body (specifically, the back, the waist), and the base plate ( A first hinge 150 that is connected to the upper end 111 of 110 and one side [lower end] of the

support plates

120 and 130 to rotatably connect the base plate 110 and the

support plates

120 and 130 is configured including characterized by being

In addition, the base plate 110 and the

support plates

120 and 130 are folded or unfolded by the first hinge 150 , and when the base plate 110 and the

support plates

120 and 130 are folded, the inside is in contact with each other. The base plate 110 is supported by the seat portion 11 of the chair 10 in a state in which the base plate 110 and the

support plates

120 and 130 are unfolded at a first maximum unfolding angle θ1m. When the user's upper body weight acts in a state in which the

support plates

120 and 130 are supported by the backrest 12 of the chair 10, the base plate 110 and the

support plates

120 and 130 are at the first maximum unfolding angle. The upper body of the user is supported by maintaining (θ1m), that is, not to open at an angle greater than the first maximum unfolding angle (θ1).

When the user's buttocks are leaned on the pedestal 100 while the seat portion 11 is over, the user's back and waist are supported at the same time. In particular, by supporting more of the back, the load acting on the waist when seated is reduced or Alternatively, it can be removed completely, and the effect can be realized as if you were lying on a bed at an angle while sitting on a chair.

In particular, when sitting for a long time in a narrow spaced chair such as an airplane, a long-distance bus, a car, or a high-speed train, it can provide comfort and comfort because it can be seated at an angle, and also reduces the load on the lower back when seated. or it can be eliminated. And, in the case of the chair 10 with the neck support 13, this effect may appear larger.

In addition, by implementing the pedestal 100 in a configuration that can be folded and unfolded, the base plate 110 can be folded into the

support plates

120 and 130 after using the pedestal 100 so that the volume can be made thin and compact after use, It has the advantage of being easy and convenient to carry and store.

In particular, since the base plate 110 and the

support plates

120 and 130 are thin plates, they can be stored in a handbag or backpack, so storageability and portability are further improved.

The base plate 110 and the

support plates

120 and 130 are preferably made of a synthetic resin material. According to this, the weight of the product can be reduced, and there is an advantage that portability is further improved.

As described above, since the pedestal 100 is light in weight, small in volume, and thin, it can be easily taken out and used when seated on an airplane, long-distance bus, high-speed train, etc. will improve dramatically.

The first maximum unfolding angle θ1m is characterized in that it is an obtuse angle (an angle greater than 90° and smaller than 180°).

Preferably, the first maximum unfolding angle (θ1m) is characterized in that the obtuse angle of 120 ~ 160 °. More preferably, an unfolding angle of 130 to 150 ° is formed. More preferably, an unfolding angle of 135 degrees is formed.

The first maximum unfolding angle θ1m is maintained as the upper end 111 of the base plate 110 and one side (lower end) of the

support plates

120 and 130 come into contact with each other to stop the unfolding operation.

And, the upper end 111 of the base plate 110 or one side (the lower end in reference to the drawing) of the

support plate

120 or 130 is formed to protrude, so that the second between the base plate 110 and the

support plates

120 and 130 . 1 The stopping part 141 for setting the maximum unfolding angle θ1m is further included.

In addition, when the stopping part 141 is formed on the base plate 110, the

support plates

120 and 130 are stopped by the stopping part 141 to form a first maximum unfolding angle θ1m, When the stopping part 141 is formed on the

support plates

120 and 130 , the base plate 110 is stopped by the stopping part 141 to form a first maximum unfolding angle θ1m.

Although the embodiment disclosed in the drawings discloses an example in which the stopping part 141 is formed on the upper end 111 of the base plate 110, it is not limited thereto and the lower end of the support plates 120 and 130 (specifically, the first support The lower end 122 of the plate 120] belongs to the embodiment of the present invention, of course.

The stopping part 141 is integrally formed to protrude from the upper end 111 of the base plate 110 toward the

support plates

120 and 130 .

Accordingly, since the stopping part 141 is integrally formed to protrude from the upper end 111 of the base plate 110, depending on the example, the upper end 111 of the base plate 110 is formed to protrude, and the protruding base plate It can also be seen that the upper end 111 of 110 and the lower end 122 of the support plates 120 and 130 (or the first support plate 120 ) are contacted and stopped to form a first maximum unfolding angle θ1m.

When the first support plate 120 and the second support plate 130 are unfolded, the upper end 121 of the first support plate 120 and the lower end 132 of the second support plate 130 contact each other Accordingly, the first support plate 120 and the second support plate 130 maintain the maximum unfolded state, that is, the second maximum unfolding angle θ2m is maintained by stopping the unfolding operation.

According to this, there is an advantage in that the second maximum unfolding angle θ2m can be set and maintained by the configuration of the two

support plates

120 and 130 itself.

1 to 8 , the

support plates

120 and 130 include a plurality of

support plates

120 and 130 rotatably connected to each other by one or more second hinges 160 .

One side (lower end) of any one of the plurality of

support plates

120 and 130 is rotatably coupled to the base plate 110, and the other side of the other one of the plurality of support plates 120 and 130 (based on the drawing shown) is the upper end) is supported by the backrest 12, and the plurality of

support plates

120 and 130 are spread out and in close contact with the back (waist, etc.) of the user's upper body, characterized in that it supports the back of the user's upper body. .

1 to 8, in the chair support 100 (referred to herein as a three-stage support 100) according to an embodiment of the present invention, the

support plates

120 and 130 include the A first support plate 120 rotatably connected to the base plate 110 by a first hinge 150 and a second hinge 160 rotatably connected to the first support plate 130 It is configured to include a second support plate (130).

Here, one side (lower end 122) of the first support plate 120 is rotatably coupled to the base plate 110, and the other side (top) of the second support plate 130 is the chair 10. is supported on the back 12 of It is in close contact with the back (waist, etc.) of the user's upper body to support the back of the user's body, and 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 spread out at a first maximum unfolding angle θ1m so that the base plate 110 is supported by the seat part 11 of the chair 10, and the In a state in which the second support plate 130 is supported by the backrest 12 of the chair 10 in a state in which the first and

second support plates

120 and 130 are unfolded, the upper body weight of the user is determined by the first and

second support plates

120 and 130 . When acting on , the base plate 110 and the first support plate 120 maintain the first maximum unfolding angle θ1m (that is, do not unfold at an angle greater than the first maximum unfolding angle θ1) ], it is characterized in that the first support plate 120 and the second support plate 130 support the upper body of the user by maintaining the second maximum unfolding angle (θ2m).

Even when the

support plates

120 and 130 are configured in plurality as described above, the first maximum unfolding angle θ1m forms an obtuse angle (an angle greater than 90° and smaller than 180°).

The first maximum unfolding angle θ1m is an obtuse angle of 120 to 160°, preferably an unfolding angle of 130 to 150°, and even more preferably an unfolding angle of 135°. This is because it provides a stable and comfortable seating experience.

And, the upper end 111 of the base plate 110 or the lower end 122 of the first support plate 120 is formed to protrude, so that the first maximum between the base plate 110 and the first support plate 120 . As described above, the stopping part 141 for setting the unfolding angle θ1m is further included.

In addition, when the stopping part 141 is formed on the base plate 110 , the first support plate 120 is stopped by the stopping part 141 to form a first maximum unfolding angle θ1m, and , when the stopping part 141 is formed on the first support plate 120 , the base plate 110 is stopped by the stopping part 141 to form a first maximum unfolding angle θ1m. It is also the same as described above.

In the pedestal 100 for a chair according to an embodiment of the present invention, the base plate 110 and the second support plate with the first support plate 120 positioned in the center among the three

plates

110 , 120 , 130 . It is characterized in that the plate 130 can be folded so as to be sequentially stacked. According to this, there is an advantage in that the volume of the three-stage pedestal 100 can be minimized and the thickness can be made thin.

When the first support plate 120 and the second support plate 130 are unfolded, the

outer surfaces

120b and 130b of each of the first and

second support plates

120 and 130 are unfolded to form the same surface.

Accordingly, when the first and

second support plates

120 and 130 supporting the user's back are flat and reclined, it can be more comfortable.

Here, the second maximum unfolding angle (θ2m) of the first support plate 120 and the second support plate 130 is characterized in that 180 °.

When the first support plate 120 and the second support plate 130 are unfolded, the upper end 121 of the first support plate 120 and the lower end 132 of the second support plate 130 contact each other Thus, the unfolding operation is stopped, so that the first support plate 120 and the second support plate 130 maintain the maximum unfolded state, that is, the second maximum unfolding angle θ2m is maintained.

support plates

120 and 130 itself.

Then, the base plate 110 is folded with respect to the first support plate 120 so that the inner surface 120a of the first support plate 120 and the inner surface 110a of the base plate 110 are in close contact with or face each other. and the first support plate 120 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 contact or face each other in a state in which the base plate 110 is folded. It is characterized in that the second support plate 130 is folded and stacked sequentially in the order of the first support plate 120 , the base plate 110 and the second support plate 130 .

In addition, a base reinforcing rib 115 is formed on the inner surface 110a of the base plate 110 , and a first reinforcing rib 125 is formed on the inner surface 120a of the first support plate 120 , , a second reinforcing rib 135 is formed on the inner surface 130a of the second support plate 130 .

A rim 114 protrudes inward along the edge of the base plate 110, and a pair of first dol frames 124 protrude along the left and right edges of the first support plate 120, A pair of second dol-frames 134 are protruded along the left and right edges of the second support plate 130 , and the base plate 110 is positioned so that the rim 114 is positioned inside the first dol-rim 124 . ) is folded with respect to the second support plate 130 , and in a state in which the base plate 110 is folded, the second stone frame 134 is in close contact with the first stone frame 124 to cover the base plate 110 . 2 By folding the support plate 130 with respect to the first support plate 120 , the first support plate 120 , the base plate 110 and the second support plate 130 are sequentially stacked and folded in the order of characterized.

And, 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 edge 114b protruding along the bottom edge of the base plate 110, , The lower edge 114b is characterized in that the reinforcing rib seating groove 116 for accommodating the first reinforcing rib 125 is formed in a concave shape.

The first hinge 150 includes a first hinge lower bracket 151 formed on the upper end of the base plate 110 and a first hinge upper bracket 152 formed on the lower end 122 of the first support plate 120 . ) and a first hinge pin 153 for hinge-connecting the first hinge lower bracket 151 and the first hinge upper bracket 152 . In addition, the first hinge pin 153 and the first nut 154 screw-fastened may be further included.

The second hinge 160 includes a second hinge lower bracket 161 formed on the upper end of the first support plate 120 and a second hinge upper bracket formed on the lower end 132 of the second support plate 130 . 162 and a second hinge pin 163 for hinge-connecting the second hinge lower bracket 161 and the second hinge upper bracket 162 . In addition, the second hinge pin 153 and the second nut 164 screw-fastened may be further included.

Meanwhile, as shown in FIG. 9 , according to a modified embodiment of the chair pedestal 100 according to an embodiment of the present invention, two plates, that is, the base plate 110 and the first support plate 120 . Of course, it may be configured by (referred to as a two-stage pedestal in the present specification), and of course, it falls within the technical scope of the present invention in this case as well.

In any case, the two-stage pedestal 100 or the three-stage pedestal 100 falls within the technical scope of the present invention. It is nothing more than what the user chooses and uses according to the size.

On the other hand, in the example shown in FIG. 3 , the three-stage pedestal 100 is constituted by three plates, that is, the base plate 110 and the first and

second support plates

120 and 130 , and the second support plate 130 . This is an example of using only the base plate 110 and the first support plate 120 as the pedestal 100 by folding the .

In the pedestal 100 for a chair according to an embodiment of the present invention, the

support plates

120 and 130 are described as being composed of two

support plates

120 and 130 by way of example, but the present invention is not limited thereto, and three support plates are not limited thereto. Alternatively, even if it consists of four support plates, it falls within the technical scope of the present invention, and all of them fall within the technical scope of the present invention regardless of the number of divisions.

Next, the operation of the chair support 100 according to an embodiment of the present invention having the above configuration will be described.

First, the operation of unfolding and using will be described.

The base plate 110 is spread out as much as possible at the first maximum unfolding angle θ1m, and the second support plate 130 is spread out as much as possible at the second maximum unfolding angle θ2m to unfold the pedestal 100 .

The lower end of the base plate 110 is supported on the seat portion 11 , and the upper end of the second support plate 130 is supported on the backrest portion 12 to be placed on the chair 10 .

As shown in FIG. 2 , the user's waist is approximately located at the boundary between the base plate 110 and the first support plate 120 , and the user's back lies on the first and

second support plates

120 and 130 . Cotton users feel very comfortable and comfortable as if they were lying on a bed with the back upright.

At this time, a partial load F1 of the user's body weight acts on the boundary between the base plate 110 and the first support plate 120, and even if this load F1 acts, the first maximum unfolding angle θ1m is maintained as it is. A user's other load F2 acts on the boundary between the first support plate 120 and the second support plate 130, and even if this load F2 acts, the second maximum unfolding angle θ2m ) can be maintained as it is.

Reference numeral θ1 denotes a first unfolding angle θ1 that is an angle formed between the base plate 110 and the first support plate 120, and reference number θ2 denotes the first support plate 120 and the second support plate 120 The second unfolding angle θ2 is an angle formed between the plates 130 .

Next, a folding operation for storage or portability will be described.

First, in a state in which both the base plate 110 and the second support plate 130 are unfolded (FIG. 7 (a)), the base plate 110 is folded (FIG. 7 (b)). As shown in (b) of FIG. 7 , the base plate 110 fits between the first dol frames 124 on the inner row side of the first support plate 120].

Next, in a state in which the base plate 110 is folded (FIG. 8 (a)), when the second support plate 130 is folded, all of the pedestals are folded (FIG. 8 (b)). As shown in (b) of FIG. 8 , when the second support plate 130 is folded, the second dol-frame 134 and the first dol-frame 124 come into contact with each other to form a neat appearance.

As described above, preferred embodiments according to the present invention have been reviewed, and it is common knowledge in the technical field that the present invention can be implemented in other specific forms without changing the technical spirit or essential features in addition to the above-described embodiments. It is self-evident to those who have Therefore, it should be understood that the above-described embodiments are illustrative and not restrictive.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

Claims

A chair pedestal 100 for supporting a user's back by being placed on a chair 10 comprising a seat portion 11 and a backrest portion 12,

a base plate 110 whose lower end is supported by the seat portion 11 of the chair 10;

One side is rotatably coupled to the base plate 110, the other side is supported by the backrest 12, and is in close contact with the user's upper body back to support the user's upper body back support plates (120, 130) and,

and a first hinge 150 for rotatably connecting the base plate 110 and the support plates 120 and 130,

The base plate 110 and the support plates 120 and 130 are folded or unfolded by the first hinge 150,

In a state in which the base plate 110 and the support plates 120 and 130 are unfolded at a first maximum unfolding angle θ1 m, the base plate 110 is supported by the seat portion 11 of the chair 10 and the support plates 120 and 130 ) is supported by the backrest 12 of the chair 10, and when the user's upper body weight acts, the base plate 110 and the support plates 120 and 130 maintain the first maximum angle of unfolding θ1m. , A chair support for supporting the user's upper body.
The method according to claim 1,

The upper end 111 of the base plate 110 and one side of the support plates 120 and 130 come into contact with each other to stop the unfolding operation, so that the first maximum unfolding angle θ1m is maintained.
The method according to claim 1,

The support plates 120 and 130 are,

Consists of a plurality of support plates 120 and 130 rotatably connected to each other by one or more second hinges 160,

One side of any one of the plurality of support plates 120 and 130 is rotatably coupled to the base plate 110 , and the other side of the other side of the plurality of support plates 120 and 130 is supported on the backrest 12 , ,

The plurality of support plates (120, 130) are spread out and come in close contact with the back of the user's upper body to support the back of the user's upper body.
4. The method according to claim 3,

The support plates 120 and 130 are,

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 a second hinge 160,

One side of the first support plate 120 is rotatably coupled to the base plate 110 , and the other side of the second support plate 130 is supported by the backrest 12 of the chair 10 ,

The first and second support plates 120 and 130 are connected by a second hinge 160 so that they can be unfolded and folded to each other,

The first and second support plates 120 and 130 are spread out and in close contact with the back of the user's upper body to support the back of the user's body,

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 spread out at a first maximum unfolding angle θ1m so that the base plate 110 is supported by the seat portion 11 of the chair 10 , and the first ,2 In a state in which the second support plate 130 is supported by the backrest 12 of the chair 10 in a state in which the support plates 120 and 130 are unfolded,

When the user's upper body weight acts on the first and second support plates 120 and 130, the base plate 110 and the first support plate 120 maintain a first maximum unfolding angle θ1m, The first support plate (120) and the second support plate (130) maintain a second maximum angle of unfolding (θ2m) to support the upper body of the user.
5. The method according to claim 4,

A chair pedestal, characterized in that it can be folded such that the base plate 110 and the second support plate 130 are sequentially stacked around the first support plate 120 located in the center.
3. The method according to claim 2,

It is formed to protrude from the upper end 111 of the base plate 110 or one side of the support plates 120 and 130 to set the first maximum unfolding angle θ1m between the base plate 110 and the support plates 120 and 130. The pedestal for a chair, characterized in that it further includes a stopping part (141).
7. The method of claim 6,

When the stopping part 141 is formed on the base plate 110, the support plates 120 and 130 are stopped by the stopping part 141 to form a first maximum unfolding angle θ1m,

When the stopping part 141 is formed on the support plates 120 and 130, the base plate 110 is stopped by the stopping part 141 to form a first maximum unfolding angle θ1m. pedestal for a chair.
7. The method of claim 6,

When the first support plate 120 and the second support plate 130 are unfolded, each of the outer surfaces 120b and 130b of the first and second support plates 120 and 130 is unfolded to form the same surface. pedestal for a chair.
5. The method according to claim 4,

A base reinforcement rib 115 is formed on the inner surface 110a of the base plate 110,

A first reinforcing rib 125 is formed on the inner surface 120a of the first support plate 120,

A chair pedestal, characterized in that a second reinforcing rib (135) is formed on the inner surface (130a) of the second support plate (130).
5. The method according to claim 4,

A rim 114 is formed to protrude inward along the edge of the base plate 110,

A pair of first stone frames 124 protrude along the left and right edges of the first support plate 120,

A pair of second dol frames 134 are protruded along the left and right edges of the second support plate 130,

The base plate 110 is folded with respect to the second support plate 130 so that the rim 114 is located inside the first dol frame 124,

In a state in which the base plate 110 is folded, the second support plate 130 is attached to the first support plate 120 so that the second stone frame 134 is in close contact with the first stone frame 124 and covers the base plate 110 . By folding against

The first support plate (120), the base plate (110) and the second support plate (130) are sequentially stacked and folded in order.