US 12,302,802 B2
Hand-push leaf suction machine with automatic outage function for toppling
Guangqian Dai, Zhejiang (CN)
Assigned to SHAOXING SHANGYU GUANYE ELECTRICAL APPLIANCE CO., LTD., Zhejiang (CN)
Appl. No. 17/628,186
Filed by SHAOXING SHANGYU GUANYE ELECTRICAL APPLIANCE CO., LTD., Zhejiang (CN)
PCT Filed May 15, 2020, PCT No. PCT/CN2020/090413
§ 371(c)(1), (2) Date Jan. 18, 2022,
PCT Pub. No. WO2021/164140, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 202010109560.6 (CN), filed on Feb. 22, 2020.
Prior Publication US 2022/0377989 A1, Dec. 1, 2022
Int. Cl. A01G 20/47 (2018.01); A47L 5/28 (2006.01); A47L 9/00 (2006.01); A47L 9/14 (2006.01); A47L 9/22 (2006.01); A47L 9/28 (2006.01); A47L 9/32 (2006.01)
CPC A01G 20/47 (2018.02) [A47L 5/28 (2013.01); A47L 9/009 (2013.01); A47L 9/1409 (2013.01); A47L 9/22 (2013.01); A47L 9/2868 (2013.01); A47L 9/2884 (2013.01); A47L 9/2889 (2013.01); A47L 9/325 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A handle-push leaf suction machine with an automatic outage function for toppling, comprising:
a housing (1) provided with an air duct (11), a fan (2) fixedly arranged in the housing (1), a dust collecting box (4), two ground wheels (5) arranged on two sides of the housing (1) and supported on ground, two auxiliary wheels (6) arranged on two sides of the housing (1) and supported on the ground, and a push handle (7) arranged at a rear end of the housing (1),
wherein the dust collecting box (4) is arranged at a front end of the housing (1), with a lower surface close to the ground; the height of a blade of the fan (2) is in the middle of a height direction of the dust collecting box (4); the air duct (11) comprises an air inlet passage (111), one end of the air duct is close to the ground and another end of the air duct is connected with the blade of the fan (2), and an air outlet passage (112), one end of the air outlet passage is connected with the blade of the fan (2) and the other end of the air outlet passage is connected with the dust collecting box (4); the air outlet passage (112) is connected with the top of a side surface of the duct collecting box (4) close to the fan (2); the two auxiliary wheels (6) are arranged on two sides of a lower end of the air inlet passage (111);
wherein a micro switch (8) connected with a motor of the fan (2) in series is arranged inside the housing (1); elongated slots (12) are formed in two sides of the housing (1); a wheel axle (13) with two ends passing through the elongated slots (12) are movably arranged inside the elongated slots (12); the two ground wheels (5) are arranged at two ends of the wheel axle (13); a linkage mechanism (9) located between the wheel axle (13) and the micro switch (8) and realizing turning on and turning off of the micro switch (8) is arranged inside the housing (1); when the two ground wheels (5) and the two auxiliary wheels (6) are supported on the ground, the wheel axle (13) slides to the top of the elongated slots (12) and drive the linkage mechanism (9) to press an on-off key of the micro switch (8) to turn on the micro switch (8);
wherein the rear end of the housing (1) is provided with two supporting legs (15); and
when the housing (1) tilts backwards the two supporting legs (15) and the push handle (7) are supported on the ground, the wheel axle (13) slides off to the bottom of the elongated slots (12) under gravity;
wherein the linkage mechanism (9) further comprising a rotating sleeve (91) rotatably connected in the housing (1), a push arm (92) integrally arranged on the rotating sleeve (91) and resisting against top of the wheel axle (13), and a pressing arm (93) integrally arranged on the rotating sleeve (91), wherein the pressing arm is capable of pressing the on-off key of the micro switch (8) after rotation; and when the wheel axle (13) slides to the top of the elongated slots (12), the wheel axle (13) drives the push arm (92) to rotate and drives the pressing arm (93) to press the on-off key of the micro switch (8).