KR20150060497A - Robot cleaner - Google Patents

Abstract

According to an embodiment of the present invention, provided is a robot cleaner which collects dusts on the bottom into the center by a cleaning tool having integrated functions of a side brush and a main brush, and absorbs the dust with a strong absorption force by an absorbing part with small cross section area. Provided is a robot cleaner which can guide foreign materials with large diameter into the absorbing part without interference of the cleaning tool, and effectively absorbs the foreign materials. The robot cleaner according to an embodiment of the present invention includes a body including a fan motor and a dust collection device, and including an absorbing part for absorbing foreign materials to a base; and a cleaning tool formed on the bottom of the base, and extended to one side of the front of the base from the absorbing part to guide the foreign materials to the absorbing part, wherein the cleaning tool can be moved by an outer force.

Description

Robot cleaner {Robot cleaner}

The present invention relates to a robot cleaner having improved cleaning efficiency.

The robot cleaner is a device that performs a cleaning operation by suctioning foreign matter such as dust from a floor surface while traveling the cleaning area by itself without user's operation. The robot cleaner detects distances to obstacles such as furniture, office supplies, and walls installed in the cleaning area through the distance sensor and selectively drives the left and right motor of the robot cleaner to clean the cleaning area while changing directions.

The robot cleaner is provided with a suction portion on the bottom surface, and sucks dust on the bottom surface through the suction portion. On the suction side, a main brush is rotatably provided to pick up dust on the floor surface. The robot cleaner may further include a side brush. The side brushes are provided on both sides of the front side of the robot cleaner, and collect dust and the like at a position where the main brush can not approach. The dust collected at the center by the side brush can be picked up by the main brush and sucked through the suction portion. The cleaning area of the robot cleaner can be extended by the side brush as described above.

According to an embodiment of the present invention, it is possible to provide a robot cleaner that collects dust on a floor surface at a central portion thereof and allows the suction portion to be sucked with a strong suction force by a small-sized cross-sectional area. Also, it is possible to provide a robot cleaner which can be guided to the suction portion and be effectively sucked even in the case of a foreign substance having a large diameter without interference by a cleaning tool.

A robot cleaner according to an embodiment of the present invention includes a main body having a fan motor and a dust collecting device, and having a suction portion on a bottom surface thereof; And a cleaning tool provided on a bottom surface of the main body and extending from the suction side to a front side of the main body for guiding foreign matter on the bottom surface to the suction side.

The cleaning tool is located at a position where one side is located on the suction side and the other side is adjacent to the outer diameter of the main body.

The cleaning tool is provided to be able to flow by an external force.

The suction portion is provided with a door, and the door moves in conjunction with the cleaning tool.

When one side of the cleaning tool moves to the outside of the base by an external force, the door moves together with the cleaning tool to expand the suction part.

The cleaning tool may include: a first cleaning tool extending from the suction unit side to the front left side of the main body to guide foreign matter on the floor surface to the suction unit side; And a second cleaning tool extending from the suction unit side to the front right side of the main body to guide foreign substances on the floor surface to the suction unit side.

The cleaning tool is a brush assembly including a belt having a brush on an outer peripheral surface thereof.

The brush assembly includes a first pulley mounted on the suction side and a second pulley mounted on a front side of the main body, and the belt is wound around the first pulley and the second pulley.

Wherein the belt includes a first part located on a side of the center of the body and a second part located on a side opposite to a center of the base, the belt being configured such that the first part moves from the front of the body to the inlet side Rotate.

And the belt is tilted so that the second part does not touch the bottom surface.

The belt contact portion of the first pulley and the belt contact portion of the second pulley are mounted at an angle to the outside of the main body at a predetermined angle.

A part of the brush provided on the belt is located inside the suction portion.

The cleaning tool is a blade made of a flexible rubber material.

The outer surface of the blade is provided with a coating or irregularities for easily collecting foreign matter on the bottom surface.

And a slit through which the air discharged from the dust collecting device passes is formed on the bottom surface of the main body positioned above the blade.

The cleaning tool is a roller brush provided with a spiral brush on its outer peripheral surface.

The suction passage is partitioned by a guide so that the foreign substances gathered by the cleaning tool are sucked smoothly.

A robot cleaner according to an embodiment of the present invention includes: a main body having a suction unit for sucking foreign matter on a floor; A fan motor provided in the main body and generating a suction force; A dust collecting device in which foreign matter contained in the air sucked through the suction portion is separated and accommodated; And a plurality of cleaning tools provided on a bottom surface of the main body for guiding a foreign object on the bottom surface to the suction unit side, wherein a shortest distance between any one of the plurality of cleaning tools and another adjacent cleaning tool As the distance from the suction part increases.

One side of the cleaning tool is provided so that the distance between one side of another adjacent cleaning tool can be distanced by an external force.

The cleaning tool is rotatably provided around a rotation axis provided on the other side.

The suction unit is provided with a door, and the door moves together with the cleaning tool.

And the area of the suction portion is expanded or reduced by the door.

When the external force applied to the cleaning tool is removed, the distance between one side of the cleaning tool and another adjacent cleaning tool is restored to the original state by the elastic member .

The cleaning tool comprising: a first cleaning tool having one side positioned on the suction side and the other side positioned on the front right side of the main body; And a second cleaning tool, one side of which is positioned on the suction side and the other side is positioned on the front left side of the main body.

The first cleaning tool and the second cleaning tool are formed symmetrically with each other.

A robot cleaner according to an embodiment of the present invention includes a main body having a fan motor and a dust collecting device and having a suction portion formed on a bottom surface thereof and a cleaning tool provided on a bottom surface of the main body to pick up foreign matter on the bottom surface and guide the suctioned portion toward the suction portion Wherein the cleaning tool includes a first cleaning tool extending from a side of the suction unit to a front right side of the main body and a second cleaning tool extending from a suction side of the main body to a front left side of the main body, The first cleaning tool or the second cleaning tool is pressed by a foreign matter positioned between the first cleaning tool and the second cleaning tool so that the first cleaning tool or the second cleaning tool is rotatable around the rotation axis.

The suction portion is provided with a door, and the door interlocks with the movement of the first cleaning tool or the second cleaning tool to expand or contract the area of the suction portion.

When the cleaning tool is pressed and rotated in one direction about the rotation axis, the door expands the opening area of the suction unit.

And an elastic member for applying an elastic force to the cleaning tool such that the cleaning tool rotates in the other direction when an external force applied to the cleaning tool is removed.

The cleaning tool is a brush assembly having a brush formed on the outer circumferential surface of the belt.

The belt is tilted so that a part of the brush assembly moving forward from the rear of the main body does not touch the bottom surface.

The cleaning tool is a roller brush provided with a spiral brush on its outer peripheral surface.

According to an embodiment of the present invention, the cleaning tool having the unified functions of the side brush and the main brush is arranged in the V-shape on the bottom surface of the robot cleaner, so that the dust on the bottom surface can be effectively collected toward the suction portion. A guide is provided on the suction side so that collected dust or the like can be sucked by a high suction force in the middle of the suction portion. The cleaning tool may be provided to be flowable such that foreign objects of large diameter may be sucked through the suction portion without being interfered by the cleaning tool. The suction opening can be expanded or contracted by a door that moves in conjunction with the cleaning tool.

1 is a view illustrating a robot cleaner according to an embodiment of the present invention
2 is a view illustrating a main body of a robot cleaner according to an embodiment of the present invention.
3 is a view illustrating a state where a brush is mounted on a bottom surface of a robot cleaner according to an embodiment of the present invention.
4 is a view illustrating a foreign matter pickup area of the robot cleaner according to an embodiment of the present invention.
5 is a view illustrating a tilted brush assembly of a robot cleaner according to an embodiment of the present invention.
6 is a view showing a state where a blade is mounted on a bottom surface of a robot cleaner according to an embodiment of the present invention.
7 is a view illustrating a slit formed on the upper surface of the robot cleaner according to an embodiment of the present invention.
8 is a view illustrating a state where a roller brush is mounted on a bottom surface of a robot cleaner according to an embodiment of the present invention.
9 is a view illustrating a suction path of a robot cleaner according to an embodiment of the present invention.
10 is a bottom view of a robot cleaner according to another embodiment of the present invention.
11A is a view showing a state in which a brush assembly of a robot cleaner according to another embodiment of the present invention rotates to extend a suction portion.
11B is a view showing a part of the second rail of the robot cleaner according to another embodiment of the present invention.
12 is a view showing a rail part of a robot cleaner according to another embodiment of the present invention.
13 is a view showing a suction portion of a robot cleaner according to another embodiment of the present invention.

Hereinafter, a robot cleaner according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a view illustrating a robot cleaner according to an embodiment of the present invention. FIG. 2 is a view illustrating a main body of a robot cleaner according to an embodiment of the present invention. FIG. 2 is a view showing a state where a brush is mounted on a bottom surface of the robot cleaner according to an embodiment of the present invention.

1 to 3, a robot cleaner 1 according to an embodiment of the present invention includes a cover 2 and a main body 3. The cover 2 can cover the upper portion of the main body 3. A bumper 20 may be provided on the side of the robot cleaner 1. The external impact applied to the robot cleaner 1 by the bumper 20 can be buffered. A sensor (not shown) may be provided on a side surface of the robot cleaner 1 to detect an obstacle located in the vicinity of the robot cleaner 1. [

The robot cleaner 1 can be driven by the wheel 43. [ The wheels 43 may be provided on both left and right sides of the robot cleaner 1, respectively. When the bottom surface of the robot cleaner 1 is provided in a circular shape, the wheels 43 may be provided on both the left and right sides of the center point of the robot cleaner 1, respectively. The wheel 43 can be driven by a motor. The wheel 43 rotates clockwise or counterclockwise so that the robot cleaner 1 can be driven in various directions.

The robot cleaner 1 may further include a caster 44 capable of traveling in all directions. The casters 44 may be provided on the front or rear of the robot cleaner 1. [ The bottom surface of the robot cleaner 1 can be stably supported by the two wheels 43 and one or more casters 44. [ Further, the direction of the robot cleaner 1 can be smoothly switched by the casters 44 that can be moved in all directions.

The main body 3 may include a fan motor 40, a dust collector 41, and a suction passage 42. The main body 3 may include a fan motor 40, a dust collecting device 41 and a base 4 on which the suction passage 42 is installed. The suction unit 45 may be formed on the base 4. The suction unit 45 formed on the base 4 and the dust collecting apparatus 41 can be connected by the suction flow path 42. [

The fan motor 40 generates a suction force. The foreign matter contained in the air sucked by the fan motor 40 can be accommodated in the dust collecting device 41. [ The foreign matter can be separated and accommodated in the dust collecting apparatus 41 while passing through the foreign matter collecting apparatus 41 introduced through the suction unit 45 formed in the base 4. [ The separated air can be discharged from the dust collecting device 41.

As the dust collecting device 41, a cyclone dust collecting device may be provided. The cyclone dust collector 41 generates a swirling airflow to separate air and foreign matter by a centrifugal force. The separated air is discharged to the outside, and the dust collecting device 41 can accumulate foreign matter. When foreign matter accumulates to some extent in the dust collecting apparatus 41, the user can separate the dust collecting apparatus 41 and discard foreign matters inside.

A cleaning tool may be provided on the bottom surface of the base 4. The cleaning tool includes a first cleaning tool having one side positioned on the side of the suction unit 45 and the other side extending toward the front right side of the base 4 and a second cleaning tool having one side positioned on the suction unit 45 side and the other side disposed on the front left side And a second cleaning tool. The other side of the first cleaning tool and the other side of the second cleaning tool may be arranged so as to be as far as possible in the base 4. [ For example, the shortest distance between the other side of the first cleaning tool and the other side of the second cleaning tool may be equal to or close to the diameter of the base 4.

The cleaning tool may be a brush assembly 30, 30 'provided in a conveyor belt manner. The brush assemblies 30 and 30 'can pick up foreign matters on the bottom surface and move them toward the suction unit 45 formed on the base 4. [ The foreign matter moved toward the suction portion 45 can be moved to the dust collecting device 41 through the suction flow path 42 by the suction force of the fan motor 40. [

The brush assembly 30, 30 'may include a first brush assembly 30 and a second brush assembly 30'. One side of the first brush assembly 30 and one side of the second brush assembly 30 'are disposed adjacent to each other so that the other side of the first brush assembly 30 and the other side of the second brush assembly 30' . The first brush assembly 30 and the second brush assembly 30 'may be arranged in a V-shape.

One side of the first brush assembly 30 and one side of the second brush assembly 30 'may be positioned on the suction side 45 side. The other side of the first brush assembly 30 and the other side of the second brush assembly 30 'may be arranged to be as close as possible to the outer diameter of the base 4, That is, the other side of the first brush assembly 30 and the other side of the second brush assembly 30 'may be positioned as far as possible in the left-right direction. The other side of the first brush assembly 30 and the other side of the second brush assembly 30 'are arranged so as to be spaced apart as much as possible, so that the region where the foreign substance can be picked up by the brush assemblies 30 and 30' can be widened.

For example, the other side of the brush assembly 30, 30 'may be located in front of or behind the wheel 43. That is, the brush assembly 30, 30 'may extend from the suction portion 45 side to the front or rear of the wheel 43.

The first brush assembly 30 may include pulleys 31 and 32 and a belt 33 connected to the motor. The pulleys (31, 32) include a first pulley (31) and a second pulley (32). The first pulley 31 may be provided on the side of the suction unit 45 formed on the base 4. The second pulley 32 may be provided so as to be close to the outer diameter of the base 4 located on the right side of the bottom surface of the base 4. [ The second pulley 32 may be positioned so as to be adjacent to a point where the diameter of the second pulley 32 extending in the left-right direction on the bottom surface of the base 4 meets the outer diameter of the base 4. The belt 33 can be wound on the first pulley 31 and the second pulley 32. [

The belt 33 may be formed of a stretchable rubber material. A brush (34) may be provided on the outer circumferential surface of the belt (33). The brush 34 may be provided along the extending direction of the belt 33. When the belt 33 is rotated by the pulleys 31 and 32, the brush 34 moves in the moving direction of the belt 33 and picks up the foreign matter on the bottom surface and guides the foreign matter to the suction part 45 side.

The pulleys 31 and 32 can be rotated counterclockwise by the motor. When the pulleys 31 and 32 are rotated in the counterclockwise direction by the motor, the belt 33 can be rotated counterclockwise by the pulleys 31 and 32.

A part of the belt 33 located on the inner side P of the base 4 about the pulleys 31 and 32 is referred to as a first part A and a part of the belt 33 located on the inner side P of the base 4 about the pulleys 31 and 32 The first part A moves from the front to the rear of the robot cleaner 1 and the second part B moves from the robot cleaner 1 to the robot cleaner 1, In the rear direction.

The first part A moves toward the suction part 45 from the front of the robot cleaner 1 and the second part B moves toward the front of the robot cleaner 1 from the suction part 45 side . Foreign substances on the bottom surface can be picked up by the brush 34 provided in the first part A and guided to the suction part 45 side. The foreign matter guided to the suction portion 45 side can be introduced into the dust collecting device 41 through the suction flow path 42 by the suction force of the fan motor 40. [

Similarly, the second brush assembly 30 'may include pulleys 31', 32 'and a belt 33' connected to the motor. The pulleys 31 ', 32' include a first pulley 31 'and a second pulley 32'. The first pulley 31 'may be provided on the side of the suction unit 45 formed on the base 4. The second pulley 32 'may be provided so as to be close to the outer diameter of the base 4 located on the left side in the bottom surface of the base 4. [ The second pulley 32 'may be positioned so as to be adjacent to a point where the diameter extending in the left-right direction on the bottom surface of the base 4 meets the outer diameter of the base 4. The second pulley 32 of the first brush assembly 30 and the second pulley 32 'of the second brush assembly 30' may be positioned so as to be as far as possible from each other on the bottom surface of the base 4. The belt 33 'can be wound on the first pulley 31' and the second pulley 32 '.

The belt 33 'may be made of a stretchable rubber material. A brush 34 'may be provided on the outer circumferential surface of the belt 33'. The brush 34 'may be provided along the extending direction of the belt 33'. When the belt 33 'is rotated by the pulleys 31' and 32 ', the brush 34' moves in the moving direction of the belt 33 ', picks up the foreign matter on the bottom surface and guides it to the suction part 45 side .

The pulleys 31 'and 32' can be rotated clockwise by the motor. When the pulleys 31 'and 32' are rotated clockwise by the motor, the belt 33 'can be rotated clockwise by the pulleys 31' and 32 '.

A part of the belt 33 'located on the inner side of the base 4 around the pulleys 31' and 32 'is referred to as a first part A' The first part A 'moves from the front to the rear of the robot cleaner 1 and the second part B' moves from the front to the rear of the robot cleaner 1 when a part of the belt 33 ' 'Can be moved forward from the rear of the robot cleaner 1.

The first part A 'moves toward the suction part 45 side from the front of the robot cleaner 1 and the second part B' moves toward the front of the robot cleaner 1 from the suction part 45 side . Foreign matter on the bottom surface can be picked up by the brush 34 provided in the first part A 'and guided to the suction part 45 side. The foreign matter guided to the suction portion 45 side can be introduced into the dust collecting device 41 through the suction flow path 42 by the suction force of the fan motor 40. [

Although the first brush assembly 30 is rotated in the counterclockwise direction and the second brush assembly 30 'is rotated in the clockwise direction in the above description, the first brush assembly 30 is rotated in the clockwise direction Or the second brush assembly 30 'may rotate in a counterclockwise direction. When the first brush assembly 30 rotates in the clockwise direction, the foreign substance on the bottom surface may be picked up by the second part B and guided to the suction unit 45. [ When the second brush assembly 30 'rotates in the counterclockwise direction, the foreign substance on the bottom surface may be picked up by the second part B' and guided to the suction part 45. It is preferable that the foreign substance on the bottom surface is picked up by the first part A of the first brush assembly 30 and the first part A 'of the second brush assembly 30' . ≪ / RTI > Hereinafter, the first brush assembly 30 rotates in the counterclockwise direction to pick up foreign substances on the bottom surface by the first part A, and the second brush assembly 30 ' A ') is picked up on the bottom surface will be described.

4 is a view illustrating a foreign matter pickup area of the robot cleaner according to an embodiment of the present invention.

Referring to FIG. 4, the robot cleaner 1 according to the embodiment of the present invention can be cleaned in a wide area by the brush assemblies 30 and 30 '. Foreign substances on the floor located at the front P based on the traveling direction of the robot cleaner 1 may be picked up by the brush assemblies 30 and 30 'provided in a V shape and guided to the suction unit 45 side.

In the conventional robot cleaner, a wheel is provided on both sides of the robot cleaner. The wheels were provided on both sides of the center of the robot cleaner for stable running of the robot cleaner. The roller brush was mounted on the suction side of the robot cleaner located on the front or rear side of the robot cleaner to pick up foreign matters on the floor. The suction portion and the brush are provided in front of or behind the robot cleaner so as not to be interfered by the wheel.

According to the conventional robot cleaner, the foreign substance located on the bottom surface corresponding to the length of the roller brush provided on the suction portion side is picked up and sucked through the suction portion, so that the bottom surface can be cleaned. When the robot cleaner is provided in a circular shape, the extending length of the roller brush located forward or rearward of the robot cleaner in the left-right direction is smaller than the diameter of the robot cleaner. Therefore, the area of the bottom surface that can be cleaned by the roller brush while the robot cleaner travels is smaller than the area of the bottom surface that the robot cleaner travels while traveling.

Therefore, in order to improve cleaning efficiency of the robot cleaner, a side brush was installed in front of the robot cleaner. The side brush was provided at the front of the robot cleaner and rotated to collect foreign matter into the center of the robot cleaner. Large, smooth contaminants can be effectively collected by the side brush to the center of the robot cleaner, but lightweight, bulky dust or hair could adhere to the side brush and reduce cleaning performance. Also, there was a case where the dust on the bottom surface was pushed out to the outside of the robot cleaner. The side brush protruding outward is caught by the obstacle, and the robot cleaner can not travel.

The robot cleaner 1 according to an embodiment of the present invention is provided with a circular robot cleaner and includes a brush assembly 30, 30 'extending in a V-shape on the bottom surface thereof to pick up a foreign material on a floor surface having a large area, can do. The first pulleys 31 and 31 'positioned on the suction unit 45 side and the belts 33 and 33' are rotated on the second pulleys 32 and 32 'adjacent to the left and right sides of the diameter of the robot cleaner 1, And the foreign matter on the bottom surface can be picked up by the brushes 34, 34 'provided on the belt 33, 33'. The belts 33 and 33 'provided with the brushes 34 and 34' extend adjacent to both sides of the diameter of the robot cleaner 1 so that the area of the bottom surface on which foreign matter is picked up by the brush assemblies 30 and 30 ' Can be close to the area of the bottom surface where the robot cleaner 1 travels while traveling. As compared with the conventional robot cleaner, the robot cleaner 1 according to the embodiment of the present invention can pick up and clean foreign objects located on the floor of a large area. Foreign substances picked up by the first parts A and A 'of the brush assemblies 30 and 30' can be guided to the suction part 45 side and sucked into the dust collecting device 41. [

Since the foreign material is guided to the suction unit 45 by the V-shaped cleaning tool as described above, the area of the suction unit 45 can be made smaller than the area of the suction unit formed in the conventional robot cleaner. When the area of the suction portion becomes smaller, it is possible to have a larger suction force by the same plate fan motor. Accordingly, since a larger suction force can be generated without using a fan motor having a large output, a robot cleaner with improved cleaning performance can be manufactured without increasing the manufacturing cost of the robot cleaner.

Meanwhile, the suction portion 45 is formed to be wider than the area of the cross section of the suction passage 42, so that fine dusts floating on the outer side R of the cleaning tool can be sucked by the cleaning tool.

5 is a view illustrating a tilted brush assembly of a robot cleaner according to an embodiment of the present invention.

Referring to FIG. 5, the brush assemblies 30 and 30 'may be provided in a tilted manner to prevent the robot cleaner 1 from obstructing the running of the robot cleaner 1 according to an embodiment of the present invention. The brush assemblies 30 and 30 'can be tilted so that the portion of the robot cleaner 1, which obstructs the traveling of the robot cleaner 1, does not touch the bottom surface.

The first brush assembly 30 may be rotated counterclockwise. The first part (A) of the first brush assembly (30) moves from the front to the rear of the robot cleaner (1). A frictional force is generated between the first part A and the bottom surface to push the bottom surface backward and move the robot cleaner 1 forward. However, in the case of the second part B, frictional force for moving the robot cleaner 1 backward is generated between the robot cleaner 1 and the bottom surface while moving forward from the rear of the robot cleaner 1. [ The frictional force between the second part B and the bottom surface hinders the robot cleaner 1 from running. In the case of the second part B, foreign matter on the bottom surface is not sucked and guided to the suction part 45 side, and foreign substances can be pushed out of the robot cleaner 1.

The first pulley 31 and the second pulley 32 may be mounted so that the belt contacting portion where the belt 33 is wound and tilted is inclined at a predetermined angle so that the second part B does not contact the bottom surface. For example, the belt contact portions of the first pulley 31 and the second pulley 32 may be inclined at a predetermined angle so as to face the outside of the robot cleaner 1. The belt 33 wound around the first pulley 31 and the second pulley 32 can be tilted along the inclination angle of the pulleys 31 and 32. The first part A of the first brush assembly 30 is brought into contact with the bottom surface to pick up foreign matter on the bottom surface and guide it to the suction part 45 side. The second part B of the first brush assembly 30 is spaced apart from the bottom surface and does not interfere with the running of the robot cleaner 1. [ As a result, the robot cleaner 1 can be smoothly driven.

A portion of the brush 34 positioned on the first pulley 31 side is provided on the suction side of the suction unit 45 so that the belt 34 contacts the first pulley 31, As shown in FIG. A part of the brush 34 is positioned inside the suction portion 45, so that the performance of separating the foreign matters attached to the brush 34 by the suction force of the fan motor 40 can be improved.

Similarly, the second brush assembly 30 'may rotate clockwise. The first part A 'of the second brush assembly 30' moves from the front to the rear of the robot cleaner 1. A frictional force is generated between the first part A 'and the bottom surface to push the bottom surface backward and move the robot cleaner 1 forward. However, in the case of the second part B ', a frictional force for moving the robot cleaner 1 backward is generated between the robot cleaner 1 and the floor surface while moving forward from the rear of the robot cleaner 1. The frictional force between the second part B 'and the bottom surface hinders the robot cleaner 1 from running. Further, in the case of the second part B ', foreign matter on the bottom surface is not sucked and guided to the suction part 45 side, and the foreign matter can be pushed out of the robot cleaner 1.

The first pulley 31 'and the second pulley 32' are mounted such that the belt abutting portion to which the belt 33 'is wound is contacted is inclined at a predetermined angle so that the second part B' . For example, the belt contact portions of the first pulley 31 'and the second pulley 32' may be inclined at an angle to face the outside of the robot cleaner 1. The belt 33 'wrapped around the first pulley 31' and the second pulley 32 'can be tilted along the inclination angle of the pulleys 31' and 32 '. The first part A 'of the second brush assembly 30' contacts the bottom surface to pick up foreign matter on the bottom surface and guide it toward the suction part 45 side. The second part B 'of the second brush assembly 30' is spaced apart from the bottom surface and does not interfere with the running of the robot cleaner 1. As a result, the robot cleaner 1 can be smoothly driven.

At this time, the belt contact portion of the first pulley 31 'is inclined to the outside of the robot cleaner 1 at a predetermined angle, so that a part of the brush 34' positioned on the first pulley 31 ' 45). ≪ / RTI > A part of the brush 34 'is positioned inside the suction part 45, so that the performance of separating the foreign substance attached to the brush 34' by the suction force of the fan motor 40 can be improved.

As described above, since the portion of the brush assembly 30, 30 ', which obstructs the running of the robot cleaner 1, is rotated without touching the bottom surface, the robot cleaner 1 can be rotated The vehicle 1 can run smoothly. In addition, cleaning efficiency can be improved by preventing the foreign material on the floor surface from being pushed outside the robot cleaner 1 by the brush assemblies 30 and 30 '. Since a part of the brushes 34 and 34 'is located inside the suction portion 45, the performance of separating the foreign matter attached to the brushes 34 and 34' by the suction force of the fan motor 40 can be improved.

FIG. 6 is a view showing a state where a blade is mounted on a bottom surface of a robot cleaner according to an embodiment of the present invention. FIG. 7 is a view showing a state where a slit is formed on the upper surface of the robot cleaner according to an embodiment of the present invention Fig.

Referring to FIGS. 6 and 7, the cleaning tool provided on the bottom surface of the robot cleaner 1 according to an embodiment of the present invention may be a blade 50, 50 '. The blades 50, 50 'include a first blade 50 and a second blade 50'. One side of the first blade 50 and one side of the second blade 50 'may be positioned on the suction side 45 side. The other side of the first blade 50 and the other side of the second blade 50 'may be arranged to be spaced as far as possible in the left-right direction. For example, the other side of the first blade 50 and the other side of the second blade 50 'may be positioned so as to be adjacent to a point where the diameter extending in the lateral direction in the base 4 meets the outer diameter of the base 4 . Thus, the first blade 50 and the second blade 50 'can be arranged in a V-shape so as to be spaced further from the rear side where the suction portion 45 is located to the front side.

The blades 50 and 50 'may be made of a flexible material. For example, the blades 50 and 50 'may be made of a rubber material. The surfaces of the blades 50 and 50 'may be coated or uneven so that foreign substances on the bottom surface can be easily collected.

As the robot cleaner 1 travels forward, the foreign substances on the bottom surface located inside the blades 50, 50 'where the center of the base 4 is located are removed by the blades 50, 50' ) Side. The foreign matter guided to the suction portion 45 side can be sucked by the suction force of the fan motor 40. [

A slit 46 may be formed in the base 4. The slits 46 may be formed at positions corresponding to the positions of the blades 50 and 50 '. The air exhausted from the dust collecting device 42 of the robot cleaner 1 can be transferred to the inside of the blades 50 and 50 'through the slit 46. The air transferred to the inside of the blades 50 and 50 'moves along the inside of the blades 50 and 50' to move the foreign materials located inside the blades 50 and 50 'toward the suction part 45 have. Thus, the foreign matter on the bottom surface can be smoothly moved toward the suction portion 45 side and sucked by the blades 50, 50 '.

8 is a view illustrating a state where a roller brush is mounted on a bottom surface of a robot cleaner according to an embodiment of the present invention.

Referring to FIG. 8, a cleaning tool provided in the robot cleaner 1 according to an embodiment of the present invention may be roller brushes 60 and 60 '. The roller brushes 60 and 60 'include a first roller brush 60 and a second roller brush 60'. One side of the first roller brush 60 and one side of the second roller brush 60 'may be positioned on the suction side 45 side. The other side of the first roller brush 60 and the other side of the second roller brush 60 'may be arranged to be spaced as far as possible in the left-right direction. For example, the other side of the first roller brush 60 and the other side of the second roller brush 60 'are positioned so as to be adjacent to a point where the diameter extending in the lateral direction in the base 4 meets the outer diameter of the base 4 . Thus, the first roller brush 60 and the second roller brush 60 'may be arranged in a V-shape such that they are spaced further from the rear of the suction portion 45 to the front.

The roller brushes 60 and 60 'may be rotatable about the extending direction of the roller brushes 60 and 60'. Brushes 61 and 61 'may be provided on the outer peripheral surfaces of the roller brushes 60 and 60' in a spiral shape. Flow paths 62 and 62 'are formed between adjacent helical brushes 61 and 61' so that the suction force of the fan motor 40 can be transmitted to the other side of the roller brushes 60 and 60 '. The foreign matter floated by the brushes 61 and 61 'can move toward the suction portion 45 through the flow paths 62 and 62' formed between the adjacent helical brushes 61 and 61 '. Thus, foreign matter on the bottom surface can be smoothly moved toward the suction portion 45 side and sucked by the roller brushes 60 and 60 '.

9 is a view illustrating a suction path of a robot cleaner according to an embodiment of the present invention.

Referring to FIGS. 4 and 9, guides 47 and 47 'may be provided in the suction passage 42 of the robot cleaner 1 according to an embodiment of the present invention. The flow paths on the suction portion 45 side can be partitioned into a plurality of channels by the guides 47 and 47 '. For example, the guides 47 and 47 'may include a first guide 47 and a second guide 47'. The suction unit 45 is guided by the guides 47 and 47 'to the first suction unit 450, the second suction unit 451 and the third suction unit 451, respectively, located on both right and left sides of the first suction unit 450 452, respectively.

The flow rate of the air sucked through the suction portion 45 can be concentrated by the guides 47 and 47 'to a specific portion. For example, when the foreign object is collected at the center of the suction unit 45 by the V-shaped cleaning tool, the air is introduced into the suction channel 42 through the first suction unit 450, 47, 47 '. The first suction portion 450 may be formed to have the widest opening in order to allow a large amount of air to flow into the suction flow path 42 side through the first suction portion 450. The foreign matter collected by the cleaning tool can be sucked smoothly through the first suction portion 450. [ Fine dust or the like floating around the cleaning tool by the cleaning tool can be sucked through the second suction part 451 and the third suction part 452. [

The suction force of the fan motor 40 is concentrated in the middle portion by providing the guides 47 and 47 'on the side of the suction portion 45 as described above, so that the foreign substances and the like can be more efficiently sucked.

10 is a bottom view of a robot cleaner according to another embodiment of the present invention.

Referring to FIG. 10, a robot cleaner 1 'according to another embodiment of the present invention may be provided with a cleaning tool on one side of a base 4'.

The cleaning tool is similar to the vacuum cleaner 1 according to the embodiment of the present invention and includes a first cleaning tool having one side positioned on the suction side 48 side and the other side extending to the front right side of the base 4 ' And a second cleaning tool positioned on the suction side 48 side and the other side extending to the front left side. The other side of the first cleaning tool and the other side of the second cleaning tool may be disposed as far as possible in the base 4 'so that the robot cleaner 1' can travel while picking up foreign objects in a wide area.

One side of the first cleaning tool and the one side of the second cleaning tool positioned adjacent to each other may be provided apart from each other on the suction portion 48 side. The foreign object disposed in front of the robot cleaner 1 'may be sucked through the suction unit 48 located between one side of the first cleaning tool and one side of the second cleaning tool. The distance between one side of the first cleaning tool and one side of the second cleaning tool may be variable. If the one side of the first cleaning tool and the one side of the second cleaning tool are spaced from each other, the area of the suction unit 48 can be enlarged.

With this configuration, even when a relatively large foreign object is positioned in front of the robot cleaner 1 ', it can be sucked through the widened suction portion 48 without interference from the cleaning tool.

The cleaning tool may be a brush assembly 70, 70 'provided in a conveyor belt manner. The brush assembly 70, 70 'includes a first brush assembly 70 and a second brush assembly 70'. One side of the first brush assembly 70 and one side of the second brush assembly 70 'are disposed adjacent to each other and the other side is spaced apart and disposed in a substantially V-shape. The robot cleaner 1 according to the present invention can be applied similarly.

The first brush assembly 70 and the second brush assembly 70 'may be provided so as to vary the position on the base 4' so as not to interfere with the foreign objects disposed in front of the robot cleaner 1 '.

Since the structure of the second brush assembly 70 'is similar to that of the first brush assembly 70, the structure of the first brush assembly 70 will be described below.

The first brush assembly 70 includes pulleys 71 and 72 and a belt 74 connected to the motor. The belt 74 may be wound around the pulleys 71 and 72 to be rotatable. The belt 74 may be mounted with a brush 75 and rotated together with the belt 74.

The pulleys 71 and 72 include a first pulley 71 and a second pulley 72. The first pulley 71 and the second pulley 72 may be mounted on the plate 73. A first pulley 71 may be mounted on one side of the plate 73 and a second pulley 72 may be mounted on the other side.

The plate 73 is positioned such that the first pulley 71 is located on the side of the suction portion 48 formed on the bottom surface of the base 4'and the second pulley 72 is located on the right side of the bottom of the base 4 ' May be mounted on the bottom surface of the base 4 'so as to be adjacent to the outer diameter of the base 4.

The second pulley 72 may be rotatably mounted on the base 4 '. The second pulley 72 is fixed at a specific position adjacent to the outer diameter of the base 4 'and can rotate in one direction. The second pulley 72 can rotate in a counterclockwise direction and the belt 74 wound on the second pulley 72 can be rotated counterclockwise by the second pulley 72. [ When the belt 74 rotates in the counterclockwise direction, foreign substances on the bottom surface can be picked up by the brush 75 mounted on the belt 74 and collected toward the suction portion 48 side.

The first pulley 71 can rotate counterclockwise together with the second pulley 72. At least one of the first pulley 71 and the second pulley may be rotated by receiving a driving force from a driving source provided in the main body 2. [ For example, the first pulley 71 can be manually and counterclockwise rotated by the belt 74 that is rotated counterclockwise by the second pulley 72 without receiving the driving force.

The first pulley 71 may be provided as a free end. That is, the first pulley 71 is not fixed at a specific point on the bottom surface of the base 4 ', but can be provided so that the position of the first pulley 71 can be varied on the base 4'. When the first pulley 71 is fixed to the plate 73, one side of the plate 73 on which the first pulley 71 is mounted is provided as a free end, and the other side, on which the second pulley 72 is mounted, May be provided as a fixed end fixed to a specific point of the first end 4 '.

The first brush assembly 70 may be provided so as to be pressed and moved by a foreign matter positioned in the front. For example, it may be pressurized by the foreign matter of the first brush assembly 70 and rotated about the second pulley 72. When the first brush assembly 70 is rotated about the second pulley 72, the position of the first pulley 71 in the base 4 'can be varied. The plate 73 rotates around the second pulley 72 located on the other side of the plate 73 and the first pulley 71 located on one side of the plate 73 is rotated around the second pulley 72 It is possible to move from the center side of the suction portion 48 to the outside.

The second brush assembly 70 'may be operated similarly to the first brush assembly 70. The second brush assembly 70 'may be configured to rotate the first pulley 71' along a portion of the circumference about the second pulley 72 '.

Although the first and second pulleys 71 and 72 are mounted on one plate 73 in the above description, the first brush assembly 70 may be in the form of the first pulley 71 and the second pulley 72, 2 pulleys 72 are mounted on one plate 73. In this case,

The belt 74 wrapped around the first pulley 71 and the second pulley 72 is not loosened unless the first pulley 71 and the second pulley 72 are mounted on the plate 73. [ The pulley 71 may be provided to be movable along a part of the circumference centered on the second pulley 72.

For example, one side of the first brush assembly 70 is provided as a free end and the other side is provided as a fixed end, and one side of the first brush assembly 70 can be moved along a part of the circumference centered on the fixed end Respectively.

FIG. 11A is a view showing a state in which a brush assembly of a robot cleaner according to another embodiment of the present invention rotates and a suction part is widened. FIG. 11B is a side view of a robot cleaner according to another embodiment of the present invention. And a part of a part thereof.

11A and 11B, a rail portion for guiding the movement of the first pulley 71 is provided on the bottom surface of the base 4 '. When the first brush assembly 70 rotates along the second pulley 72, the first brush assembly 70 may be guided along the rail portion.

Only when the diameter of the foreign matter positioned forward in relation to the running direction of the robot cleaner 1 is larger than the distance between the first brush assembly 70 and the second brush assembly 71 located on the suction part 48 side, An elastic member may be further provided to provide elastic force to the first brush assembly 70 so that the brush assembly 70 can rotate in the counterclockwise direction C1 about the second pulley 72. [ When foreign matter having a diameter larger than the distance between the first brush assembly 70 and the second brush assembly 71 is sucked through the suction unit 48, the first brush assembly 70 is rotated by the elastic force of the elastic member It can rotate in the clockwise direction (C2) around the second pulley 72 and return to the original position.

The resilient member provides an elastic force such that the first pulley 71 side of the first brush assembly 70 is positioned adjacent to the center portion of the suction portion 48. When the first brush assembly 70 is pressed by the foreign material positioned in front of the first brush 70, the first brush assembly 70 rotates counterclockwise (C1) around the second pulley 72 .

When the first brush assembly 70 is rotated in the counterclockwise direction C1 about the second pulley 72, the interval between the first brush assembly 70 and the second brush assembly 70 ' . The gap between the first brush assembly 70 and the second brush assembly 70 'does not change at the side of the second pulleys 72 and 72', but the amount of change in distance before and after the rotation increases toward the first pulleys 71 and 71 ' .

When the foreign substance is sucked through the suction unit 48 and the pressing force of the first brush assembly 70 is removed, the first brush assembly 70 is rotated clockwise around the second pulley 72 by the elastic force of the elastic member The first pulley 71 can be returned to the home position before the rotation so that the first pulley 71 is located on the side of the center portion of the suction portion 48. [

In the case of the second brush assembly 70 ', similarly to the case of the first brush assembly 70, when the second brush assembly 70' is pressed by foreign matter, the second brush assembly 70 ' 2 ' clockwise about the pulley 72 '. When the second brush assembly 70 rotates in the clockwise direction C2 ', the gap between the first brush assembly 70 and the second brush assembly 70' on the suction side 48 side is distant. So that the first pulley 71 'is positioned on the center side of the suction unit 48 by the elastic member when the foreign substance is sucked through the suction unit 48 and the pressing force of the second brush assembly 70' It is possible to return to the home position before the rotation.

Hereinafter, an embodiment of the rail portion structure for guiding the movement of the first brush assembly 70 when the first brush assembly 70 rotates will be described.

12 is a view showing a rail part of a robot cleaner according to another embodiment of the present invention.

12, the rail unit according to an embodiment of the present invention includes a first rail 76 provided at one side of the first brush assembly 70 and a second rail 77 provided at the bottom of the base 4 ' ). The first rail 76 may extend along the direction in which the first brush assembly 70 extends. The second rail 77 may be provided to extend in the left-right direction.

The first brush assembly 70 is movable in a plane parallel to the base 4 '. In the plane in which the first pulley 71 and the second pulley 72 of the first brush assembly 70 are positioned, the left and right direction in which the suction portion 48 extends is referred to as the x-axis direction, If the vertical direction is the y-axis direction, the copper line of the first pulley 71 of the first brush assembly 70 can be divided into the x-axis direction and the y-axis direction.

The first rail 76 may be provided to guide movement in the x-axis and y-axis directions, and the second rail 77 may be provided to guide movement in the x-axis direction. The first pulley 71 and the second pulley 77 can simultaneously move in the x-axis and y-axis directions.

The first rail 76 and the second rail 77 may be connected by a connecting member 78. One side of the connecting member 78 can be slidably positioned on the first rail 76 and the other side can be slidably positioned on the second rail 77. When the first brush assembly 70 rotates about the second pulley 72, the connecting member 78 can move in the x-axis direction along the second rail 77, The position of the connecting member 78 can be varied.

The connecting member 78 includes a first head portion 781 slidably positioned in the first rail 76 and a second head portion 782 slidably positioned in the second rail 77 . The first head portion 781 and the second head portion 782 may be connected by a connecting portion 780. The diameters W3 and W4 of the first head portion 781 and the second head portion 782 may be greater than the diameter W2 of the connecting portion 780. [

The first rail 76 may extend along at least a portion of a straight line connecting the center of the first pulley 71 of the first brush assembly 70 to the center of the second pulley 72. The first rail 76 may be provided on one side of the plate 73.

The first rail 76 may include first guide portions 761 and 761 'mounted on the plate 73 and second guide portions 762 and 762' bent from the first guide portion 761 . The plate 73 may be equipped with two first guide portions 761 and 761 'positioned to be opposed to each other, and the ends of the second guide portions 762 and 762' may be bent to face each other.

An opening 760 may be provided between the second guide portions 762 and 762 '. The width W1 of the opening 760 may be formed to be larger than the diameter W2 of the connecting portion 780 and smaller than the diameter W3 of the first head portion 781. [ The first head portion 781 may be interfered by the second guide portions 762 and 762 'and not be separated from the first rail portion 76.

The second rail portion 77 may be provided so as to have a structure similar to that of the first rail portion 76. The second rail part 77 may be provided on one side of the base 4 'so as to extend in the x-axis direction. The second rail part 77 includes two first guide parts 771 and 771 'mounted on one surface of the base 4' and second guide parts 772 and 772 'bent from the first guide parts 771 and 771' do. The end portions of the second guide portions 772 and 772 'may be bent so as to face each other.

An opening 770 may be formed between the second guide portions 772 and 772 '. The width W5 of the opening 770 is formed to be larger than the diameter W2 of the connecting portion 78 and smaller than the diameter W4 of the second head portion 782. [ The second head portion 782 may be interfered by the second guide portions 772 and 772 'and may not be released from the second rail portion 77.

With this structure, as the first brush assembly 70 rotates about the second pulley 72, the connecting member 78 is guided by the second rail portion 77 so as to move in the left-right direction, that is, x And the position of the connecting member 78 in the first racetrack 77 can be varied, so that the first brush assembly 70 does not interfere with the movement of the first brush assembly 70.

The first brush assembly 70 can be provided with an elastic force by the elastic member 79 so that one side where the first pulley 71 is located is directed toward the center side of the suction unit 48. [ For example, the elastic member 79 is provided on the second rail portion 77 so that the elastic member 79 can provide an elastic force so that the connecting member 78 is located on the center side of the suction portion 48, unless an external force is applied. The elastic member 79 may be provided on the first rail 76 or the second rail 77.

The second brush assembly 70 'may also be provided with an elastic force so as to be positioned on the center side of the suction portion 48 by an elastic member similar to the first brush assembly 70. [ For example, one side of the first brush assembly 70 may be positioned on the center side of the suction unit 48 by receiving an elastic force from the right side to the left side, and one side of the second brush assembly 70 ' And may be positioned on the center side of the suction unit 48 by receiving an elastic force toward the right side.

The diameters of the foreign materials positioned in front of the first brush assembly 70 and the second brush assembly 70 'are set to be smaller than the diameters of the first brush assembly 70 and the second brush assembly 70' ', The first brush assembly 70 can be pressed to the right side and the second brush assembly 70' can be pressed to the left side by the foreign matter. The first brush assembly 70 can rotate about the second pulley 72 and the connecting member 78 is guided by the first rail 76 and the second rail 77, Movement of the assembly 70 may not be interfered.

For example, in the case of the first brush assembly 70, the connection member 78 can move along the second rail portion 77 to the outer diameter side of the base 4 ' The position of the connecting member 78 in the one rail portion 76 can be moved to the upper right side. Similarly, in the case of the second brush assembly 70, the connecting member can be moved to the outer diameter side of the base along the second rail portion by the front foreign material, and the position of the connecting member at the first rail portion is moved to the upper left .

Thus, the first brush assembly 70 and the second brush assembly 70 'are pressed by the foreign matter positioned in front of the first brush assembly 70 and the second brush assembly 70' So that the suction portion 48 side can be spaced apart. In this way, the suction unit 48 positioned between the first brush assembly 70 and the second brush assembly 70 'can be widely secured. Foreign matter having a large diameter can be sucked through the wide suction portion 48.

13 is a view showing a suction portion of a robot cleaner according to another embodiment of the present invention.

Referring to FIG. 13, the suction unit 48 of the robot cleaner 1 'according to another embodiment of the present invention can be opened and closed by doors 49a and 49b. The doors 49a and 49b include a second door 49b that moves in conjunction with the movement of the first door 49a and the second brush assembly 70 'that move in conjunction with the operation of the first brush assembly 70 .

The first door 49a may be interlocked with the first brush assembly 70 so as to move. In detail, the first door 49a is allowed to cooperate with the movement of the first brush assembly 70 to move in the x-axis direction. The second door 49b can cooperate with the movement of the second brush assembly 70 to move in the x-axis direction.

When an external force is not applied to the first brush assembly 70 and the second brush assembly 70 'and the distance between the first door 49a and the second door 49b is D1, When the assembly 70 or the second brush assembly 70 'is pressed respectively, the first door 49a moves to the right P2 and the second door 49b moves to the left P2' The distance between the second door 49a and the second door 49b may be D2 that is longer than D1. The distance D2 between the first door 49a and the second door 49b may be equal to or larger than the diameter of the foreign object sucked through the suction unit 48. [

The foreign substances may be sucked in a state where the distance between the first door 49a and the second door 49b is D1 when the diameter of the foreign matter disposed in front of the robot cleaner 1 is not large. When the diameter of the foreign object located in front of the robot cleaner 1 is large, the doors 49a and 49b move in the right or left direction due to foreign substances, and the distance between the doors 49a and 49b can be distanced to D2. The suctioned portion 48 is expanded by the remote doors 49a and 49b and a foreign substance having a large diameter can be sucked through the extended suction portion 48. [

As described above, the foreign matter having a diameter equal to or less than D1 can be sucked through the suction portion 48 between the doors 49a and 49b without interference by the brush assemblies 70 and 70 ' The brush assemblies 70 and 70 'are pressed so that the interval between the brush assemblies 70 and 70' located on the suction unit 48 side is increased. The doors 49a and 49b are moved to the left or right by interlocking with the brush assemblies 70 and 70 'so that the distance between the doors 49a and 49b can be as large as the diameter of the foreign object, So that foreign matter can be sucked through the portion 48.

Foreign matter having a diameter equal to or smaller than D1 can be sucked in through a narrow suction unit 48 with a large suction force and foreign matter having a diameter equal to or greater than D1 is supplied to the brush assemblies 70, Can be sucked through the suction part (48) widened in accordance with the diameter of the foreign object without being interfered with by the foreign matter (70 ').

After the large diameter foreign object is sucked, the first brush assembly 70 and the second brush assembly 70 'can be returned to their original positions by the elastic force of the elastic member. The doors 49a and 49b together with the first brush assembly 70 and the second brush assembly 70 'may be returned to the original position and the distance between the doors 49a and 49b may be D1. That is, the first door 49a moves to the left P1 and the second door 49b moves to the right P1 'so that the distance between the doors 49a and 49b can be D1.

The brush assembly 70, 70 'is movable so that foreign matter having a larger diameter than the gap between the brush assemblies 70, 70' moves toward the suction portion 48 without interference of the brush assembly 70.70 ' . The width of the suction portion 48 can be varied by the doors 49a and 49b moved in conjunction with the operation of the brush assemblies 70 and 70 'so that the foreign matter having a large diameter can be sucked by the suction portion 48 have. The relatively small foreign matter can be sucked through the narrow suction portion 48, thereby increasing the suction force and improving the performance.

In the above description, both the first brush assembly and the second brush assembly are provided so as to be able to move by an external force, and the first door and the second door are interlocked with the operation of the first brush assembly and the second brush assembly, respectively, Either the first brush assembly or the second brush assembly may be provided to be movable so that either the first door or the second door may be interlocked to move. The shape of the rail and the connecting member for guiding the movement of the first brush assembly or the second brush assembly is not limited to the above description. It is also possible that the roller brush is provided so as to be able to flow by the external force from the bottom surface of the main body.

1: Robot cleaner 2: Cover
3: Main body 4: Base
30: Brush assembly 31: First pulley
32: second pulley 33: belt
34: Brush 40: Fan motor
41: dust collecting device 42:
45: suction portion 46: slit
48: Suction part 49a, 49b: Door
50: blade 60: roller brush
70: first brush assembly 70 ': second brush assembly
71: first pulley 72: second pulley
73: plate 74: belt
75: Brush 76: 1st leg part
77: second rail 78 connecting member
79: Elastic member

Claims (32)

A fan motor and a dust collecting device; And
And a cleaning tool provided on a bottom surface of the main body and extending from a side of the suction unit to a front side of the main body to guide foreign matter on the bottom surface to the suction unit side. The method according to claim 1,
Wherein the cleaning tool is located at a position where one side is located on the suction side and the other side is located at a point adjacent to the outer diameter of the main body. The method according to claim 1,
Wherein the cleaning tool is provided to be movable by an external force. The method of claim 3,
Wherein the suction unit is provided with a door, and the door moves in conjunction with the cleaning tool. 5. The method of claim 4,
Wherein the door moves together with the cleaning tool to expand the suction portion when one side of the cleaning tool moves to the outside of the base by an external force. The method according to claim 1,
The cleaning tool may include: a first cleaning tool extending from the suction unit side to the front left side of the main body to guide foreign matter on the floor surface to the suction unit side; And
And a second cleaning tool extending from a side of the suction unit to a front right side of the main body and guiding a foreign object on a bottom surface to the suction unit side. The method according to claim 6,
Wherein the cleaning tool is a brush assembly including a belt having a brush on an outer peripheral surface thereof. 8. The method of claim 7,
Wherein the brush assembly includes a first pulley mounted on the suction side and a second pulley mounted on a front side of the main body, the belt being wound around the first pulley and the second pulley. 9. The method of claim 8,
Wherein the belt includes a first part located on a side of the center of the body and a second part located on a side opposite to a center of the base, the belt being configured such that the first part moves from the front of the body to the inlet side Rotating robot cleaner. 10. The method of claim 9,
And the belt is tilted so that the second part does not touch the bottom surface. 11. The method of claim 10,
Wherein the belt contact portion of the first pulley and the belt contact portion of the second pulley are mounted at an angle to the outside of the main body. 11. The method of claim 10,
Wherein a portion of the brush provided on the belt is located inside the suction portion. The method according to claim 1,
Wherein the cleaning tool is a blade made of a flexible rubber material. 14. The method of claim 13,
Wherein the outer surface of the blade is provided with a coating or irregularities for easily collecting foreign substances on the bottom surface. 14. The method of claim 13,
And a slit through which the air discharged from the dust collecting device passes is formed on a bottom surface of the main body positioned on the upper portion of the blade. The method according to claim 1,
Wherein the cleaning tool is a roller brush provided with a spiral brush on an outer circumferential surface thereof. The method according to claim 1,
Wherein the suction unit is partitioned by a guide so as to smoothly suck foreign matter gathered by the cleaning tool. A main body provided with a suction portion for sucking foreign substances on the bottom surface;
A fan motor provided in the main body and generating a suction force;
A dust collecting device in which foreign matter contained in the air sucked through the suction portion is separated and accommodated; And
And a plurality of cleaning tools provided on a bottom surface of the main body for guiding a foreign object on the bottom surface to the suction unit side,
Wherein the shortest distance between any one of the plurality of cleaning tools and the adjacent one of the cleaning tools is located away from the suction part. 19. The method of claim 18,
Wherein one side of the cleaning tool is provided so that a distance between one side of another adjacent cleaning tool can be distanced by an external force. 20. The method of claim 19,
Wherein the cleaning tool is rotatably provided around a rotation axis provided on the other side. 19. The method of claim 18,
Wherein the suction unit is provided with a door, and the door moves together with the cleaning tool. 22. The method of claim 21,
And the area of the suction portion is expanded or reduced by the door. 19. The method of claim 18,
When the external force applied to the cleaning tool is removed, the distance between one side of the cleaning tool and another adjacent cleaning tool is restored to the original state by the elastic member robotic vacuum. 24. The method of claim 23,
The cleaning tool comprising: a first cleaning tool having one side positioned on the suction side and the other side positioned on the front right side of the main body; And
And a second cleaning tool having one side positioned on the suction side and the other side positioned on the front left side of the main body. 25. The method of claim 24,
Wherein the first cleaning tool and the second cleaning tool are symmetrical to each other. A robot cleaner comprising: a main body having a fan motor and a dust collecting device and having a suction part formed on a bottom surface thereof; and a cleaning tool provided on a bottom surface of the main body to pick up foreign materials on the bottom surface,
The cleaning tool includes a first cleaning tool extending from the suction unit side to the front right side of the main body and a second cleaning tool extending from the suction side side to the front left side of the main body,
Wherein the first cleaning tool or the second cleaning tool is pressed by a foreign matter positioned between the first cleaning tool and the second cleaning tool so that the first cleaning tool or the second cleaning tool is rotatable about a rotation axis. 27. The method of claim 26,
Wherein the suction portion is provided with a door and the door is interlocked with the movement of the first cleaning tool or the second cleaning tool to expand or contract the area of the suction portion. 28. The method of claim 27,
Wherein the door extends the opening area of the suction unit when the cleaning tool is pressed and rotated in one direction about the rotation axis. 27. The method of claim 26,
Further comprising an elastic member for applying an elastic force to the cleaning tool such that the cleaning tool rotates in the other direction when an external force applied to the cleaning tool is removed. 27. The method of claim 26,
Wherein the cleaning tool is a brush assembly having a brush formed on the outer peripheral surface of the belt. 31. The method of claim 30,
Wherein the belt is tilted so that a part of the brush assembly moving forward from the rear of the main body does not touch the bottom surface. 27. The method of claim 26,
Wherein the cleaning tool is a roller brush provided with a spiral brush on an outer circumferential surface thereof.

Images