Autonomous mobile cleaner and method for moving the same

{
  "publication_number": "US8713748B2",
  "country": "US",
  "kind": "B2",
  "title": "Autonomous mobile cleaner and method for moving the same",
  "abstract": "Disclosed are an autonomous mobile cleaner, and a method for moving the same. A user's intention may be estimated based on a size and a direction of a tensile strength applied to the air pipe, and a cleaner body may move according to the user's intention. This can allow the cleaner to autonomously move. Besides, the autonomous mobile cleaner can always and precisely detect a user's operation without having interference with obstacles, using a displacement of the air pipe. Further, the fabrication costs can be reduced and displacements in all directions can be calculated, by using a hall sensor and a magnet member. Further, a user's efforts to operate the cleaner can be minimized, and can be prevented damages of the air pipe, a connection part between the air pipe and the cleaner body, etc. due to an excessive force.",
  "claims": [
    "1. An autonomous mobile cleaner, comprising: a cleaner body; a suction unit having a handle, and configured to suck foreign materials thereinto; an air pipe configured to connect the cleaner body and the suction unit to each other, and configured to guide the foreign materials into the cleaner body; a sensing unit provided at a connection part between the air pipe and the cleaner body, and configured to output a sensing signal by sensing a size and a direction of a tensile strength applied to the air pipe; and a control unit configured to move the cleaner body based on the sensing signal, wherein the cleaner body includes a connection pipe at one side thereof, so that the air pipe can be connected to the connection pipe, and wherein the sensing unit includes: a hall sensor installed in the connection pipe; and a magnet member installed in the air pipe to correspond to the hall sensor.",
    "2. The autonomous mobile cleaner of claim 1, further comprising: driving wheels installed at a lower part of the cleaner body, and configured to move the cleaner body; and a driving unit having a driving motor, and configured to operate the driving wheels by operating the driving motor based on a driving signal.",
    "3. The autonomous mobile cleaner of claim 2, wherein the control unit is configured to calculate a displacement of the air pipe based on the sensing signal, and to generate the driving signal based on the calculated displacement.",
    "4. The autonomous mobile cleaner of claim 3, wherein the driving signal indicates a signal for forward or backward moving the cleaner body, or a signal for rotating or stopping the cleaner body.",
    "5. The autonomous mobile cleaner of claim 4, wherein the control unit controls a distance between a user and the cleaner body to be within a prescribed value, based on the calculated displacement.",
    "6. The autonomous mobile cleaner of claim 1, wherein the hall sensor is formed in two, and the two hall sensors are installed in the connection pipe in directions perpendicular to each other.",
    "7. An autonomous mobile cleaner, comprising: a cleaner body having a connection pipe at one side thereof, and having driving wheels at a lower part thereof; a suction unit having a handle, and configured to suck foreign materials thereinto; an air pipe connected to the connection pipe, and configured to guide the foreign materials into the cleaner body; a sensing unit configured to output a sensing signal by sensing a size and a direction of a tensile strength applied to the air pipe, and comprised of a hall sensor installed in the connection pipe, and a magnet member installed in the air pipe to correspond to the hall sensor; a control unit configured to calculate a displacement of the air pipe using the sensing signal, and configured to generate a driving signal based on the calculated displacement; and a driving unit configured to operate the driving wheels based on the driving signal.",
    "8. The autonomous mobile cleaner of claim 7, wherein the control unit controls a distance between a user and the cleaner body to be within a prescribed value, by forward or backward moving the cleaner body, or by rotating or stopping the cleaner body.",
    "9. The autonomous mobile cleaner of claim 7, wherein the hall sensor is formed in two, and the two hall sensors are installed in the connection pipe in directions perpendicular to each other.",
    "10. A method for moving an autonomous mobile cleaner, in an autonomous mobile cleaner comprising a sensing unit comprised of a hall sensor installed at a connection pipe provided at one side of a cleaner body, and a magnet member installed at an air pipe to correspond to the hall sensor, the method comprising: sensing, by the hall sensor, a size and a direction of a tensile strength applied to the air pipe; calculating a displacement of the air pipe based on the size and the direction of the tensile strength; and moving the cleaner body based on the calculated displacement.",
    "11. The method of claim 10, wherein the step of moving the cleaner body includes: operating a driving motor provided in the cleaner body based on the calculated displacement; and operating driving wheels installed at a lower part of the cleaner body by the driving motor.",
    "12. The method of claim 10, wherein the step of moving the cleaner body is a step of forward or backward moving the cleaner body, or rotating or stopping the cleaner body.",
    "13. The autonomous mobile cleaner of one of claim 2, wherein the cleaner body includes a connection pipe at one side thereof, so that the air pipe can be connected to the connection pipe.",
    "14. The autonomous mobile cleaner of one of claim 3, wherein the cleaner body includes a connection pipe at one side thereof, so that the air pipe can be connected to the connection pipe.",
    "15. The autonomous mobile cleaner of one of claim 4, wherein the cleaner body includes a connection pipe at one side thereof, so that the air pipe can be connected to the connection pipe.",
    "16. The autonomous mobile cleaner of one of claim 5, wherein the cleaner body includes a connection pipe at one side thereof, so that the air pipe can be connected to the connection pipe.",
    "17. The autonomous mobile cleaner of claim 8, wherein the hall sensor is formed in two, and the two hall sensors are installed in the connection pipe in directions perpendicular to each other.",
    "18. The method of claim 11, wherein the step of moving the cleaner body is a step of forward or backward moving the cleaner body, or rotating or stopping the cleaner body."
  ],
  "description_excerpt": "1. Field of the Invention The present disclosure relates to an autonomous mobile cleaner, and particularly, to an autonomous mobile cleaner capable of autonomously moving by estimating a user's operation intention, and a method for moving the same. 2. Background of the Invention Generally, a cleaner such as a vacuum cleaner and a steam cleaner is an apparatus for sucking air including foreign materials such as dust using a suction motor installed in a body, then removing the foreign materials using a filter, etc. in the body, and then discharging the filtered air to the outside. Such cleaner may be categorized into a canister type where a suction nozzle for sucking dust is separately provided from a body to thus be connected to a connection device, and an upright type where a suction nozzle is rotatably connected to a body. Generally, the cleaner comprises a cleaner body having a suction body, a suction nozzle configured to suck foreign material-included air disposed on the floor, and an air pipe configured to guide air sucked into the suction nozzle to the cleaner body. The cleaner body moves along the suction nozzle while the suction nozzle is moved by a user.\n\nIn order to move the cleaner, the user should have a force corresponding to a frictional force of the cleaner body with respect to the floor. This may cause a difficulty in moving the cleaner. That is, the user should directly move the cleaner body or should move the cleaner by pulling the air pipe, because a power system for autonomous movement of the cleaner is not provided at the cleaner body.",
  "cpc": [
    "A47L 9/28",
    "A47L 5/36",
    "A47L 9/24",
    "A47L 9/242",
    "A47L 9/2805",
    "A47L 9/2852",
    "B25J 13/08",
    "G01D 5/145"
  ],
  "ipc": [
    "A47L 5/36",
    "A47L 9/28"
  ],
  "assignees": [
    "LG ELECTRONICS INC"
  ],
  "inventors": [
    "YOON SANGHO",
    "PARK JAEHARK"
  ],
  "filing_date": "2013-02-20",
  "publication_date": "2014-05-06",
  "grant_date": "2014-05-06",
  "priority_date": "2012-02-21",
  "application_number": "US-201313771916-A",
  "family_id": "47754279",
  "citations": [
    "JPH02209017A",
    "JPH0492634A",
    "US7043794B2"
  ]
}