US 11,896,131 B2
Bed
Deukwon Lee, Seoul (KR); Minkyu Oh, Seoul (KR); Yongnam Kim, Seoul (KR); Daewoong Kim, Seoul (KR); Seongwoo An, Seoul (KR); Yanghwan No, Seoul (KR); and Keunho Ju, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Nov. 12, 2020, as Appl. No. 17/096,648.
Claims priority of application No. 10-2020-0042008 (KR), filed on Apr. 7, 2020; application No. 10-2020-0042009 (KR), filed on Apr. 7, 2020; application No. 10-2020-0042010 (KR), filed on Apr. 7, 2020; application No. 10-2020-0042012 (KR), filed on Apr. 7, 2020; application No. 10-2020-0042015 (KR), filed on Apr. 7, 2020; application No. 10-2020-0042018 (KR), filed on Apr. 7, 2020; application No. 10-2020-0042019 (KR), filed on Apr. 7, 2020; application No. 10-2020-0042020 (KR), filed on Apr. 7, 2020; and application No. 10-2020-0042021 (KR), filed on Apr. 7, 2020.
Prior Publication US 2021/0307530 A1, Oct. 7, 2021
Int. Cl. A61G 7/002 (2006.01); A61G 7/015 (2006.01); A47C 21/04 (2006.01); A47C 20/04 (2006.01); A47C 27/06 (2006.01); A47C 23/00 (2006.01); D06F 60/00 (2009.01); A47C 31/00 (2006.01); A47C 23/34 (2006.01); A47C 27/05 (2006.01); A47C 31/12 (2006.01); A61G 7/018 (2006.01); F24F 8/108 (2021.01); A47C 27/10 (2006.01); A47C 27/14 (2006.01); A47C 23/043 (2006.01)
CPC A47C 21/044 (2013.01) [A47C 20/041 (2013.01); A47C 23/002 (2013.01); A47C 23/34 (2013.01); A47C 27/053 (2013.01); A47C 27/064 (2013.01); A47C 27/065 (2013.01); A47C 31/008 (2013.01); A47C 31/12 (2013.01); D06F 60/00 (2013.01); A47C 21/048 (2013.01); A47C 23/043 (2013.01); A47C 27/05 (2013.01); A47C 27/10 (2013.01); A47C 27/14 (2013.01); A47C 31/123 (2013.01); A61B 2562/0247 (2013.01); A61G 7/018 (2013.01); A61G 2203/12 (2013.01); A61G 2203/34 (2013.01); F24F 8/108 (2021.01)] 23 Claims
OG exemplary drawing
 
1. A bed, comprising
a mattress having a prescribed width and a prescribed length, the mattress having a plurality of cushion cases,
wherein each cushion case of the plurality of cushion cases includes:
a plurality of cushions provided in the cushion case,
a drive coupled to the cushion case, and
a plurality of drive gears configured to transmit a force from the drive to the plurality of cushions such that a firmness of the cushions in the cushion case are adjusted when the drive is operated,
wherein each cushion includes:
a first elastic member,
a second elastic member surrounding the first elastic member,
a screw configured to change a height of the first elastic member with respect to the second elastic member when the screw is rotated, and
a transmission gear configured to rotate the screw and configured to engage with at least one drive gear of the plurality of drive wars,
wherein the drive includes at least one of an actuator or a motor, and the plurality of drive gears include:
a first gear coupled to a rotation shaft of the drive,
at least one second gear engaged with the first gear, and
a plurality of third gears provided between adjacent transmission gears,
wherein the second gear is engaged with at least one third gear or the transmission gear.