VACUUM CLEANER

• US 20170245707A1
• Filed: 02/28/2017
• Published: 08/31/2017
• Est. Priority Date: 02/29/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: SON, Jungkyu, NAM, Bohyun, PARK, Jaeyong, BAE, Sehwan, SEO, Jonghyun, LEE, Jinwoo
• Granted Patent: US 10,575,690 B2
• Time in Patent Office: Days
• CPC Class Codes: A47L 2201/04 Automatic control of the travelling movement; Automatic obstacle detection
• CPC Class Codes: A47L 5/362 of the horizontal type, e.g. canister or sledge type
• CPC Class Codes: A47L 9/0081 Means for exhaust-air diffusion; Means for sound or vibration damping
• CPC Class Codes: A47L 9/009 Carrying-vehicles; Arrangements of trollies or wheels; Means for avoiding mechanical obstacles
• CPC Class Codes: A47L 9/102 Dust separators cyclones A47L9/16
• CPC Class Codes: A47L 9/12 Dry filters
• CPC Class Codes: A47L 9/22 Mountings for motor fan assemblies
• CPC Class Codes: A47L 9/242 Hose or pipe couplings
• CPC Class Codes: A47L 9/2805 Parameters or conditions being sensed
• CPC Class Codes: A47L 9/2852 Elements for displacement of the vacuum cleaner or the accessories therefor, e.g. wheels, casters or nozzles
• CPC Class Codes: A47L 9/2857 User input or output elements for control, e.g. buttons, switches or displays
• CPC Class Codes: A47L 9/2884 Details of arrangements of batteries or their installation
• CPC Class Codes: A47L 9/2894 Details related to signal transmission in suction cleaners
• CPC Class Codes: A47L 9/32 Handles

Abstract

Provided is a vacuum cleaner including a cleaner body disposed at a position distant from the ground; moving wheels rotatably installed at both sides of the cleaner body and configured to rotatably support the cleaner body; a dust container installed at a front surface of the cleaner body located at a front of the moving wheels and configured to collect suctioned dust; and a suction hose connected to the front surface of the cleaner body and through which the dust is suctioned, wherein a center of gravity of the cleaner body is located at a rear side further than a vertical extension line of a rotating center of the moving wheels, and a rear end of the cleaner body becomes closer to the ground when travel of the vacuum cleaner is stopped.

Claims

1. A vacuum cleaner comprising:

a cleaner body;

wheels rotatably installed at both sides of the cleaner body and configured to rotatably support the cleaner body;

a suction hose connected to a front surface of the cleaner body and configured to guide dust to the cleaner body; and

a dust container detachably coupled at a front portion of the cleaner body and located forward of the wheels, the dust container being configured to receive suctioned dust,

wherein a center of gravity of the cleaner body is located rearward of a vertical extension line that extends vertically from a rotating center of the wheels, and

wherein the cleaner body is configured to rotate about the wheels such that a rear end of the cleaner body is closer to ground based on the vacuum cleaner being stationary as compared to the vacuum cleaner being moved in a forward direction.

2. The vacuum cleaner according to claim 1, further comprising a main motor that is located within the cleaner body and is configured to generate suction force, wherein the main motor is located rearward of the vertical extension line.

3. The vacuum cleaner according to claim 1, wherein a bottom surface of the cleaner body includes a center portion, a first half portion that is inclined upward from a front end of the center portion in the forward direction, and a second half portion that is inclined upward from a rear end of the center portion in a rearward direction.

4. The vacuum cleaner according to claim 3, wherein the first half portion includes a front wheel that is configured to rotate based on making contact with the ground or an object.

5. The vacuum cleaner according to claim 3, wherein the second half portion includes a rear wheel unit that is configured to make contact with the ground based on the cleaner body being rotated in a first direction such that the second half portion becomes closer to the ground.

6. The vacuum cleaner according to claim 5, wherein the rear wheel unit includes an elastic portion that provides an elastic force to the second half portion based on the cleaner body being rotated in the first direction.

7. The vacuum cleaner according to claim 5, wherein the rear wheel unit is located rearward of the wheels, and the wheels and the rear wheel unit provide a three-point support to the cleaner body based on the vacuum cleaner being stationary.

8. The vacuum cleaner according to claim 3, wherein the cleaner body includes side portions that extend vertically upward from both side ends of the center portion, and wherein the wheels are provided at each of the side portions.

9. The vacuum cleaner according to claim 3, wherein the cleaner body is configured to rotate in a first direction based on the vacuum cleaner initiating travel in the forward direction, and to maintain the center portion in a substantially parallel state with the ground while the vacuum cleaner is travelling.

10. The vacuum cleaner according to claim 1, wherein the cleaner body includes a seating portion configured to accommodate the dust container, the seating portion including an inclination such that an upper end of the dust container is directed rearward.

11. The vacuum cleaner according to claim 1, further comprising a cover member that is configured to be rotatably opened and closed and that is provided at an upper surface of the cleaner body, the cover member being configured to cover an upper portion of the dust container based on the cover member being in a closed state.

12. The vacuum cleaner according to claim 11, wherein the cover member includes a connector to which the suction hose is connected, the suction hose being in communication with a suction port of the dust container via the connector.

13. The vacuum cleaner according to claim 1, wherein the cleaner body is configured to rotate such that an angle between a front end of the cleaner body and the ground is greater based on the vacuum cleaner being stationary as compared to the vacuum cleaner travelling in the forward direction.

14. The vacuum cleaner according to claim 1, wherein the cleaner body is configured to rotate such that an angle between a rear end of the cleaner body and the ground decreases based on the vacuum cleaner being stationary as compared to the vacuum cleaner travelling in the forward direction.

15. The vacuum cleaner according to claim 1, wherein a bottom surface of the cleaner body is maintained in a substantially parallel state with the ground based on the vacuum cleaner travelling in the forward direction.

16. The vacuum cleaner according to claim 1, wherein the suction hose is connected to the cleaner body at a location that is forward of and vertically higher than a rotating shaft of the wheels, and the cleaner body is configured to rotate about the wheels based on the suction hose being pulled by a user.

17. The vacuum cleaner according to claim 1, wherein the cleaner body is configured to, based on the cleaner body starting to move in the forward direction, rotate such that a front end of the cleaner body becomes farther from the ground.

18. A vacuum cleaner comprising:

a cleaner body;

wheels rotatably installed at both sides of the cleaner body and configured to rotatably support the cleaner body;

a suction hose connected to a front surface of the cleaner body and configured to guide dust to the cleaner body; and

a dust container detachably coupled at a front portion of the cleaner body and located forward of the wheels, the dust container being configured to receive suctioned dust,

wherein a center of gravity of the cleaner body is located rearward of a vertical extension line that extends vertically from a rotating center of the wheels,

wherein the cleaner body is configured to rotate about the wheels such that a rear portion of the cleaner body is closer to ground based on the vacuum cleaner being stationary as compared to the vacuum cleaner moving in a forward direction, and

wherein the wheels and a rear end of the cleaner body provide a three-point support to the cleaner body based on the vacuum cleaner being stationary.

19. The vacuum cleaner according to claim 18, wherein a rear portion of the cleaner body includes a rear wheel unit that is configured to contact the ground based on the vacuum cleaner being stationary.

20. The vacuum cleaner according to claim 19, wherein the rear wheel unit is positioned rearward of a center point between the wheels.