US 12,303,092 B2
Cleaning unit comprising agitator
Woo Hong, Seoul (KR); Sangik Lee, Seoul (KR); and Jongho Park, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/597,930
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jul. 24, 2020, PCT No. PCT/KR2020/009748
§ 371(c)(1), (2) Date May 16, 2022,
PCT Pub. No. WO2021/020812, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 10-2019-0092683 (KR), filed on Jul. 30, 2019.
Prior Publication US 2023/0180981 A1, Jun. 15, 2023
Int. Cl. A47L 9/04 (2006.01); A47L 9/28 (2006.01)
CPC A47L 9/0477 (2013.01) [A47L 9/0494 (2013.01); A47L 9/2805 (2013.01); A47L 9/2847 (2013.01); A47L 2201/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cleaning unit comprising:
a power module;
a body part rotatably connected to the power module and includes a first through-hole defined in an outer circumferential surface thereof;
a shaft that is inserted into a hollow hole of the body part in a lengthwise direction of the body part and performs a reciprocating motion in the body part in the length wise direction of the body part;
a brush assembly in contact with the outer circumferential surface of the body part along the lengthwise direction of the body part;
a first cam extending from a surface of the brush assembly in contact with the outer circumferential surface of the body part toward an outer circumferential surface of the shaft through the first through-hole; and
a second cam extending from the outer circumferential surface of the shaft toward the first cam,
wherein one of the first cam and the second cam is provided at one side thereof with an inclined surface that is inclined along the length wise direction of the body part, and
wherein a remaining one of the first cam and the second cam presses the inclined surface as the shaft performs the reciprocating motion, so that the brush assembly moves upward and downward in a radial direction of the shaft.