Patent WO-2019160214-A1 (WO)
Title: Seat cushion using bellows air cell and sponge foam
Inventor: HAM EUI SHIN
IPC: A47C7/02
Filed: 2018-09-19
Abstract: The present invention relates to a seat cushion using a bellows air cell and a sponge foam. More particularly, the objective of the present invention is to enable sitting in a more comfortable state by means of an ergonomic sponge foam built in the bellows air cell that is applied to a cushioning structure such as a sofa, a chair, and a mattress, and a car seat so as to enable correct posture on a seat support part and a backrest part and to prevent fatigue even after a long sitting. The configuration of the present invention is achieved as follows: in a seat cushion (100) equipped with a bellows air cell (A1) which forms an air cushion layer by the supply of air through an air hose (H) to a support part (11) and a backrest part (12) of a seat (10) by means of an operation of an air supply pump (P), the bellows air cell (A1) includes: a supporting tube body (30) having a rectangular cross section and elongated in the longitudinal direction of the supporting part (11) and having a plurality of bellows air cells (A1) which are connected at equal intervals and communicate with each other through an air passage (A3); and a backrest tube body (40) having a rectangular cross section and elongated in the longitudinal direction of the backrest part (12) and having a plurality of bellows air cells (A1) which are connected at equal intervals and communicate with each other through the air passage (A3), wherein the respective bellows air cells (A1) are provided longitudinally with a joint (C) which surrounds the sponge foam (50) elongatedly formed longitudinally from the back direction, and fuses and embeds the both ends thereof surrounding the sponge foam (50), and air is injected into an internal cushion space (S) of the bellows air cell (A1), where the sponge foam (50) is embedded, by the operation of the air supply pump (P), to pressurize the sponge foam (50) and to expand the cushion space (S) of the bellows air cell (A1), thereby forming an air cushion layer. In addition, a pelvis fixing tube (31) is formed on the support tube body (30) so as to surround a part of the bellows air cell (A1), and a back supporting tube (41) is formed on a backrest tube body (40) to surround the plurality of bellows air cells (A1) in the lateral direction to be fused and fixed, such that the hoses branched from the air hose (H) are connected to each of the pelvis fixing tube (31) and the back support tube (41) to thereby form a second cushion layer from the outside of the bellows air cell (A1) according to air supply. Furthermore, a body fixing tube (45) having a fan shape and having an air moving path (A3) at the center thereof is fused and fixed to one side of the bellows air cell (A1) so that the hose branched from the air hose (H) is connected to the body fixing tube (45) in such a manner that the body fixing tube (45) is formed to expand toward the center of the backrest tube body (40) according to air supply. Finally, the bellows air cell (A1) of the support tube body (30) and the backrest tube body (40) forms a joint (C) for linearly fusing the tip ends of both ends thereof surrounding the sponge foam (50) longitudinally from the back direction, or facely fuses and fixes together the folded both ends surrounding the sponge foam (50) and the tip end thereof.