US 11,718,947 B2
Laundry treatment machine
Junghyun Park, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 16/958,815
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Dec. 28, 2018, PCT No. PCT/KR2018/016890
§ 371(c)(1), (2) Date Jun. 29, 2020,
PCT Pub. No. WO2019/132602, PCT Pub. Date Jul. 4, 2019.
Claims priority of application No. 10-2017-0182267 (KR), filed on Dec. 28, 2017; application No. 10-2018-0005233 (KR), filed on Jan. 15, 2018; and application No. 10-2018-0053498 (KR), filed on May 10, 2018.
Prior Publication US 2021/0071340 A1, Mar. 11, 2021
Int. Cl. D06F 29/00 (2006.01); D06F 37/26 (2006.01); D06F 37/42 (2006.01); D06F 37/24 (2006.01); D06F 39/12 (2006.01); D06F 103/00 (2020.01); D06F 105/52 (2020.01); D06F 105/58 (2020.01); D06F 34/20 (2020.01); D06F 39/02 (2006.01); D06F 39/08 (2006.01)
CPC D06F 37/267 (2013.01) [D06F 37/26 (2013.01); D06F 37/42 (2013.01); D06F 34/20 (2020.02); D06F 37/24 (2013.01); D06F 39/022 (2013.01); D06F 39/08 (2013.01); D06F 39/083 (2013.01); D06F 39/12 (2013.01); D06F 2103/00 (2020.02); D06F 2105/52 (2020.02); D06F 2105/58 (2020.02)] 15 Claims
OG exemplary drawing
 
1. A laundry treatment machine comprising:
a water tank which stores water and has an open upper surface,
a first laundry tub which is rotated about a vertical axis in the water tank;
a second laundry tub which is detachably coupled to the first laundry tub, and is rotated integrally with the first laundry tub;
a locking unit which is provided in the second laundry tub and is movable between a lock position at which the locking unit engages with the first laundry tub and an unlock position at which the engagement between the locking unit and the first laundry tub is released;
a sensor operating unit which is disposed in the first laundry tub and is movable between a first position and a second position;
a sensor which is disposed in a predetermined structure fixed outside the first laundry tub and detects the sensor operating unit; and
a raising/lowering guide which guides the sensor operating unit so that the sensor operating unit is moved from the first position to the second position while being raised gradually,
wherein the sensor operating unit causes the sensor not to perform sensing at the first position and causes the sensor to perform sensing at the second position.