US 12,295,537 B2
Robot cleaner with ascending/descending guides
Woo Hong, Seoul (KR); and Sangik Lee, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/914,543
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Nov. 3, 2020, PCT No. PCT/KR2020/015185
§ 371(c)(1), (2) Date Sep. 26, 2022,
PCT Pub. No. WO2021/201364, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 10-2020-0039960 (KR), filed on Apr. 1, 2020.
Prior Publication US 2023/0146907 A1, May 11, 2023
Int. Cl. A47L 9/04 (2006.01); A47L 9/28 (2006.01)
CPC A47L 9/0494 (2013.01) [A47L 9/0405 (2013.01); A47L 9/0477 (2013.01); A47L 9/2852 (2013.01); A47L 2201/04 (2013.01); A47L 2201/06 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A robot cleaner comprising:
a cleaner body equipped with a circuit substrate and a driving wheel of which driving is controlled by the circuit substrate;
a cleaning nozzle mounted inside an opening portion opening downwardly in a lower portion of the cleaner body, and configured to ascend or descend relative to the cleaner body according to changes in a height of a cleaning surface on which the cleaner body travels;
a plurality of ascending/descending guides comprised in the cleaning nozzle and configured to guide the ascending or the descending of the cleaning nozzle;
a plurality of support portions comprised in the cleaner body and configured to support the plurality of ascending/descending guides, respectively, so that the plurality of ascending/descending guides pass through the plurality of support portions, respectively, and move in an upward or downward direction; and
a plurality of auxiliary ascending/descending guides comprised in the cleaning nozzle to be arranged below the plurality of ascending/descending guides, and configured to guide vertical ascending or descending of the cleaning nozzle.