Self-running cleaning apparatus

• US 5,109,566 A
• Filed: 06/28/1990
• Issued: 05/05/1992
• Est. Priority Date: 06/28/1990
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Corporation)
• Inventors: Eguchi, Osamu, Terai, Haruo, Yabuuchi, Hidetaka, Kondoh, Shinji, Kobayashi, Yasumichi
• Primary Examiner(s): MOORE, CHRISTOPHER K
• Time in patent office: 677 Days
• Field of Search: 15/319, 15/339, 15/340.1, 15/340.2, 180/167, 180/168, 180/169, 901/1
• US Class Current: 15/319
• CPC Class Codes: A47L 11/4011 Regulation of the cleaning machine by electric means; Control systems and remote control systems therefor
• CPC Class Codes: A47L 11/4061 Steering means; Means for avoiding obstacles; Details related to the place where the driver is accommodated
• CPC Class Codes: A47L 2201/022 Recharging of batteries
• CPC Class Codes: A47L 2201/04 Automatic control of the travelling movement; Automatic obstacle detection

Abstract

A zone of a floor to be cleaned is subdivided into a plurality of blocks, the position of each block is memorized in a memory of a self-running cleaning apparatus, and the status of each block such that a wall or an obstacle is placed on the block or the block is passed by the cleaning apparatus thereon is also memorized in the memory. The cleaning apparatus moves across the blocks having neither wall nor obstacle thereon and which have not been passed by the cleaning apparatus on the basis of a predetermined priority order in running direction.

Claims

1. A self-running cleaning apparatus comprising:

a cleaning unit comprising;

a cleaner,

means for moving said cleaning unit,

means for steering said moving means,

obstacle detection means for detecting obstacles preventing movement of said cleaning unit and outputting obstacle signals indicative thereof,

direction detection means for detecting direction of movement of said cleaning unit and outputting direction signals indicative thereof,

means for determining a distance of movement of said cleaning unit from a starting position and outputting distance signals indicative thereof,

memory means for storing data relating to dimensional features of a predetermined area,

means for, in accordance with said data, said obstacle signals, said detection signals and said distance signals, controlling said moving means and said steering means to enable said cleaning unit to evade said obstacles and to return to said starting position, and

a power source for supplying electric power to said cleaning unit; and

charging means, disposed separate from said cleaning unit, for charging said power source when said cleaning unit is in said starting position.

3. A self-running cleaning apparatus in accordance with claim 1 or 2, further comprising induction coupling means for coupling power from said charging means to said power source.

4. A self-running apparatus in accordance with claim 1 or 2, said cleaner comprising a suction nozzle having a long side and a short side, the length of said long side being substantially equal to the diameter of a bottom surface of said cleaning unit.

5. A self-running cleaning apparatus in accordance with claim 1 or 2, said control means comprising a microcomputer including a main processor and subprocessors.

6. A self-running cleaning apparatus in accordance with claim 1 or 2, said cleaning apparatus further comprising a timer operating in accordance with predetermined periodic times set therein.

9. A self-running cleaning apparatus in accordance with claim 1 or 2, wherein

said cleaning apparatus further comprises a search coil for detecting a magnetic field of said charging means and for guiding said cleaning apparatus to said charging means.

2. A self-running cleaning apparatus comprising:

a cleaning unit comprising;

a cleaner,

means for moving said cleaning unit,

means for steering said moving means,

obstacle detection means for detecting obstacles preventin movement of said cleaning unit and outputting obstacle signals indicative thereof,

direction detection means for detecting direction of movement of said cleaning unit and outputting direction signals indicative thereof,

means for determining a distance of movement of said cleaning unit from a starting position and outputting distance signals indicative thereof,

memory means for storing data relating to dimensional features of a predetermined area,

means for, in accordance with said data, said obstacle signals, said direction signals and said distance signals, controlling said moving means and said steering means to enable said cleaning unit to evade said obstacles and to return to said starting position,

hose connection means for connecting a suction hose to said cleaner, and

a power source for supplying electric power to said cleaning unit; and

charging means, disposed separate from said cleaning unit, for charging said power source when said cleaning unit is in said starting position.

7. A self-running cleaning apparatus in accordance with claim 2, said self-running cleaning apparatus further comprising air path changing means for causing said cleanser to clean using said suction hose connected to said hose connection means and preventing said cleaner from using said suction nozzle to clean.

8. A self-running cleaning apparatus in accordance with claim 2, said self-running cleaning apparatus further comprising sensor means for sensing a pulling force imposed on said suction hose, movement of said cleaning unit being controlled in accordance with an output of said sensor means.