Patent ID: 11896131
Assignee: LG ELECTRONICS INC.
Field: Furniture, games (Other fields)
Classification: CPC A  D  F | IPC A  D  F

Claim 0:
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.