US 12,226,018 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 Hojae Jung, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Nov. 6, 2020, as Appl. No. 17/091,299.
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 2021/0307531 A1, Oct. 7, 2021
Int. Cl. A47C 21/04 (2006.01); A47C 20/04 (2006.01); A47C 23/00 (2006.01); A47C 23/043 (2006.01); A47C 23/34 (2006.01); A47C 27/05 (2006.01); A47C 27/06 (2006.01); A47C 27/10 (2006.01); A47C 27/14 (2006.01); A47C 31/00 (2006.01); A47C 31/12 (2006.01); A61G 7/018 (2006.01); D06F 60/00 (2009.01); F24F 8/108 (2021.01)
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)] 12 Claims
OG exemplary drawing
 
1. A bed, comprising:
a mattress having a first layer and a second layer provided over the first layer, the first layer having a plurality of adjustable cushions, wherein each adjustable cushion includes:
a case,
a plurality of elastic cushions provided on the case,
a drive coupled to the case, and
a plurality of driving gears configured to transmit a force from the drive to the plurality of elastic cushions such that a firmness of the adjustable cushion is adjusted when the drive is operated,
wherein each elastic cushion includes:
a first elastic member,
a second elastic member,
a first case coupled to the first elastic member,
a transmission gear configured to be engaged with the plurality of driving gears, and
a screw penetrating the first case such that, when the transmission pear rotates, the first case rises or descends along the screw such that a height difference between the first and second elastic members changes,
wherein the second elastic member surrounds the first elastic member and is provided on a second case, and the first case is provided inside of the second case.