Chair seat board and chair including same

1. A chair seat board ( 100 ) comprising:

a frame unit ( 40 ) having a plurality of frames ( 41 , 42 , 43 , 44 ) configured in a hollow shape, respectively, and implemented to allow independent movement; and

a support unit configured to support the frame unit ( 40 ) while being coupled to the frame unit ( 40 ) on a lower side of the frame unit ( 40 ),

wherein the support unit includes a first support plate ( 10 ) consisting of a first central support plate ( 11 ) and side support plates ( 12 - 1 , 12 - 2 ) disposed on both sides of the first central support plate ( 11 ); a second support plate ( 20 ) coupled to an upper portion of the first support plate ( 10 ) and consisting of a second central support plate ( 21 ) and a limiting plate ( 22 ) disposed on an upper surface of one side of the second central support plate ( 21 ); and a third support plate ( 30 ) coupled to an upper portion of the second support plate ( 20 ) and consisting of a plurality of leg support plates ( 31 , 32 ) and a plurality of hip support plates ( 33 , 34 ) formed to correspond to the plurality of frames ( 41 , 42 , 43 , 44 ).

2. The chair seat board ( 100 ) according to claim 1 , wherein a thickness of the second central support plate ( 21 ) is implemented to increase as it progresses from one side on which the limiting plate ( 22 ) is disposed to a side of the second central support plate opposite the limiting plate.

3. The chair seat board ( 100 ) according to claim 1 , wherein each of the plurality of leg support plates ( 31 , 32 ) and the plurality of hip support plates ( 33 . 34 ) is provided with recesses ( 31 - 3 , 33 - 3 ) on at least some areas, and each of the plurality of frames ( 41 . 42 , 43 , 44 ) is provided with central plates ( 41 - 2 , 43 - 2 ) having central spheres ( 41 - 3 , 43 - 3 ) coupled to at least some areas of a lower surface.

4. The chair seat board ( 100 ) according to claim 3 , wherein the central spheres ( 41 - 3 , 43 - 3 ) coupled to the central plates ( 41 - 2 , 43 - 2 ) are accommodated in the recesses ( 31 - 3 , 33 - 3 ), so that a coupling between the third support plate ( 30 ) and the frame unit ( 40 ) is implemented.

5. The chair seat board ( 100 ) according to claim 4 , wherein the plurality of leg support plates ( 31 , 32 ) and the plurality of hip support plates ( 33 , 34 ) are provided with a plurality of spring groups ( 31 - 1 , 31 - 2 , 33 - 1 , 33 - 2 ) arranged to correspond to at least some areas of borders of the plurality of frames ( 41 , 42 , 43 , 44 ), and

wherein omnidirectional movement of the central spheres ( 41 - 3 , 43 - 3 ) in the recesses ( 31 - 3 , 33 - 3 ) and flexible movement of the plurality of frames ( 41 , 42 , 43 , 44 ) relative to the spring groups ( 31 - 1 , 31 - 2 , 33 - 1 , 33 - 2 ) are combined with each other to achieve independent movement of the plurality of frames ( 41 , 42 , 43 , 44 ).

6. The chair seat board ( 100 ) according to claim 1 , further comprising a memory foam ( 50 ) configured to cover the frame unit ( 40 ) coupled to the support unit.

7. The chair seat board ( 100 ) according to claim 6 , wherein the memory foam ( 50 ) is composed of a plurality of leg memory foams ( 51 , 52 ) and a plurality of hip memory foams ( 53 , 54 ) configured to correspond to the plurality of leg support plates ( 31 , 32 ) and the plurality of hip support plates ( 33 , 34 ), wherein the plurality of hip memory foams ( 53 , 54 ) are implemented such that a strength of the area corresponding to a sciatic or sit-bone site is greater than that of the other areas.

8. The chair seat hoard ( 100 ) according to claim 7 , wherein the plurality of leg memory foams ( 51 , 52 ) are implemented such that a strength of a front-end part thereof is less than that of the plurality of hip memory foams ( 53 , 54 ), and wherein an end of the front-end part of the plurality of leg memory foams ( 51 , 52 ) is formed to bend downward.

9. A chair ( 1000 ) comprising: the chair seat board ( 100 ) according to claim 1 : and a chair backboard ( 200 ) coupled to one side of the chair seat board ( 100 ).