DE112017001064B4 - Vacuum cleaner - Google Patents

Abstract

A vacuum cleaner, comprising:a cleaner body (10) whose center of gravity is located at a position further back than its center of rotation;a pair of moving wheels (60) provided on both side surfaces of the cleaner body (10) and constructed around the cleaner body (10) to be kept rotatable and also to be turned for driving; anda rear wheel unit (2170) provided on a lower surface of the cleaner body (10) and configured to elastically hold the cleaner body (10) at a position further back than the pair of moving wheels (60), wherein the rear wheel unit (2170 ) includes:a holding part (2171) rotatably installed on the lower surface of the cleaner body (10) and rotated in a rotation direction of the cleaner body (10);an elastic portion (2713) constructed to extend from one side of the holding part (2171) and being elastically deformed by being in contact with the lower surface of the cleaner body (10) when the holding part (2171) is rotated;a rotating member (2173) connected to the holding part (2171) is shaft-coupled and installed so as to be rotatable about a rotation axis perpendicular to a rotation axis of the holding member (2171);a rear wheel (2174) installed on the rotation member (2173) and rolling while in contact with the ground;installation projections (2711) formed on both side surfaces of one end of the holding member (2171) and rotatably coupled to the cleaner body (10), a base recess portion (311b) formed to be recessed and the rear wheel unit (2170) is formed on a lower surface of the cleaner body (10), and a wheel installation section (311c) in which the installation projection (2711) of the rear wheel unit (2170) is shaft-coupled and installed so as to be rotatable, inside the base recess portion (31 1b), an opening portion (2712) opened between a pair of the installation projections (2711) being formed on the holding part (2171), and the elastic portion (2713) from one end of the opening portion (2712) is opened toward the lower surface of the cleaner body (10), wherein the elastic portion (2713) is formed in a plate shape and can extend so as to be elastically deformed when in contact with a lower surface of the cleaner body (10) is.

Description

Background technology

In general, a vacuum cleaner is a device that sucks dust and foreign substances on a surface to be cleaned using a suction motor provided inside a main body and then filters the dust and foreign substances inside the main body.

The vacuum cleaner described above can be divided into an upright vacuum cleaner in which a suction nozzle is connected to a main body to be moved together with the main body, and a canister vacuum cleaner in which the suction nozzle is connected by a connecting pipe, a handle, a hose and the like Main body is connected to be classified.

In Korean KR 10 2012 0 004 100 A (published on January 12, 2012) a vacuum cleaner is disclosed as a document of the prior art.

The EP 2 305 089 A1 discloses an electric cleaning device. The WO 01/35 807 A1 discloses a caster roller assembly for a vacuum cleaner. The DE 10 2007 043 725 A1 relates to a mobile vacuum cleaner and a swivel castor of a mobile vacuum cleaner. The US 5,479,676 A reveals a vacuum cleaner.

epiphany

Technical problem

The present invention is directed to a vacuum cleaner which is enabled to be maintained in a stably maintained state while stopped.

Likewise, the present invention is directed to a vacuum cleaner having a rear wheel unit that resiliently holds the vacuum cleaner when the vacuum cleaner is stopped.

Also, the present invention is directed to a vacuum cleaner that prevents a cleaner body from being excessively rotated or tipped over due to an abnormal situation while the vacuum cleaner is being used.

Also, the present invention is directed to a vacuum cleaner that easily detects a change in an angle of a cleaner body to detect a stopped or running state of the vacuum cleaner.

Also, the present invention is directed to a vacuum cleaner that allows its rotation direction to be easily changed when the vacuum cleaner is used.

Technical solution

The invention is defined in the independent claim. Dependent claims describe preferred embodiments.

According to one aspect of the present invention, there is provided a vacuum cleaner comprising: a pair of moving wheels provided on both side surfaces of a cleaner body and constructed to rotatably hold the cleaner body and also to be rotated for driving; and a rear wheel unit provided on a lower surface of the cleaner body and configured to elastically hold the cleaner body at a position further back than the pair of moving wheels, the rear wheel unit including a holding part rotatably installed on the lower surface of the cleaner body and is rotated in a rotation direction of the cleaner body; an elastic portion constructed to extend from a side of the holding member and to be elastically deformed by being in contact with the lower surface of the cleaner body when the holding member is rotated; a rotary member shaft-coupled to the holding part and installed so as to be rotatable about a rotation axis perpendicular to the rotation axis of the holding part; and a rear wheel installed on the rotating member and capable of rolling while in contact with the ground.

The rear wheel unit may be arranged at a center between the moving wheels.

The elastic portion may be curved toward the lower surface of the cleaner body and may be elastically deformed by being pressed by the rotation of the cleaner body when the vacuum cleaner is stopped while driving.

An opening portion may be formed on the holding member, and the elastic portion may be curved from an end of the opening portion toward a lower surface of the cleaner body.

A rotary installation portion formed into a shape corresponding to that of the rotary member and accommodating the rotary member may be formed on the holding member, and a rotary hole through which a rotary shaft passes as a rotation axis of the rotary member may be formed at a center of the rotary installation portion .

An upper surface of the rotating member may be opened, and a shaft hub to which the rotating shaft is shaft-coupled may be formed at a center of the opened upper surface.

The vacuum cleaner may further include a wheel receiving portion recessed from an outer surface of the rotating member toward the rotating hub and configured to receive the rear wheel.

The vacuum cleaner may further include: a wheel motor assembly provided on the cleaner body and configured to rotate the moving wheels; a detection part provided inside the cleaner body and configured to detect an inclination of the cleaner body; and a PCB configured to drive the wheel motor assembly according to the inclination detected by the detecting part, and the cleaner body can be rotated so that its second half portion comes closer to the ground when the vacuum cleaner is stopped while driving.

The cleaner body can be rotated in a normal direction when the vacuum cleaner is running and can be rotated in a reverse direction when the vacuum cleaner is stopped so that the rear wheel unit is in contact with the floor.

The wheel motor assembly can be driven such that the lower surface of the cleaner body is maintained in a parallel state to the floor when the vacuum cleaner is traveling.

Beneficial effects

According to the vacuum cleaner according to the embodiment of the present invention, the following results can be expected.

In the vacuum cleaner according to the embodiment of the present invention, the cleaner body is rotatably supported by the moving wheels, and the detecting part for detecting the posture of the cleaner body, i.e., its inclination or rotation angle, is provided inside the cleaner body. And since the suction hose is connected to the upper portion of the cleaner body, when the user pulls the suction hose to move the vacuum cleaner, the cleaner body is tilted, and the moving wheels are driven by the detecting part that detects the tilt.

Therefore, although the user does not pull and move the cleaner body, the cleaner body can be moved automatically by a simple operation that moves the suction hose, and thus it can be moved following the user as the user moves, thereby improving the user convenience.

Also, a first half portion and a second half portion of the base which form the bottom of the vacuum cleaner can be allowed to be tilted so that the rotation of the vacuum cleaner can be performed more easily, and thus the detection part can detect the rotation of the cleaner body even when the user applies a small force, and the cleaner body can drive.

Specifically, the second half portion of the cleaner body is held in the stopped state by the rear wheel unit to always maintain a target angle, and thus the determination of the stopped and running states can be accurately performed by a change in an angle of the vacuum cleaner.

And since the cleaner body is elastically held by the rear wheel unit while in the stop state, the cleaner body can be rotated and can be in a straight movable state by an elastic force of the rear wheel unit even though the user pulls the vacuum cleaner with the small force. to use the vacuum cleaner.

And when the cleaner body is in the stopped state, the cleaner body is supported on three points by the moving wheels and the rear wheel unit and can be kept in the stable state.

Also, the second half portion of the cleaner body is elastically supported by the rear wheel unit, and the cleaner body can be prevented from being excessively rotated. Consequently, the cleaner body can always maintain a fixed angular range, and the inclination or rotation of the cleaner body can be detected more accurately.

Since the center of gravity is located in the second half portion, the cleaner body can be rotated when driving the vacuum cleaner is stopped. At this point, the rear wheel unit can elastically hold the second half portion of the cleaner body. Therefore, shock generated when the cleaner body is rotated can be alleviated and the cleaner body can be prevented from being in direct contact with the ground.

Also, the rear wheel unit may include the rear wheel, wherein the rotating member can be rotated in a direction intersecting with the rotating shaft in a direction in which the cleaner body is tilted, and which can be rolled while in contact with the cleaner body surface is. Therefore, when the travel direction of the cleaner body is rotated and changed while the rear wheel is in contact with the ground and it is kept in the stable state, the cleaner body can easily change the direction by the rotation of the rotary member. Consequently, the user can effectively change the direction with the small force, and thus the usability and operability of the vacuum cleaner can be improved.

In the vacuum cleaner according to the embodiment of the present invention, since the center of gravity of the cleaner body is located in the second half portion, the cleaner body can be rotated around the moving wheel and can be kept in the stably held state by being in contact with the ground.

And since the center of gravity is located in the second half portion, the cleaner body can be rotated and can be in the inclined state when the driving of the vacuum cleaner is stopped, and when the cleaner body is driven, its angle change takes place by the rotation, and thus The stopped or moving state of the vacuum cleaner can be precisely determined.

Also, the detection part for detecting the position of the cleaner body, i.e. its inclination or rotation angle, is provided inside the cleaner body. And since the vacuum cleaner has a structure in which the suction hose is connected to the upper portion of the cleaner body, when the user pulls the suction hose to move the vacuum cleaner, the cleaner body is tilted, and the moving wheel is controlled by the sensing part, which detects the situation captured, driven.

Therefore, even if the user does not pull the cleaner body itself to move the cleaner body, the cleaner body can be driven by a simple operation such as moving the suction hose, and the cleaner body can be driven following the user when the user moves , and thus the ease of use can be improved.

In particular, since the cleaner body can be stopped while always keeping the inclination of the cleaner body constant regardless of the presence or absence of the dust or the amount of the dust, the reliability of the detecting part in detecting the inclination can be improved.

Description of the drawings

• 1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention;
• 2 is a view showing a state in which a cleaner body and a suction unit are separated;
• 3 is a view showing a state in which a dust container is separated from the cleaner body;
• 4 Fig. 10 is a view showing a state in which a cover member of the cleaner body is opened;
• 5 is an exploded perspective view of the cleaner body;
• 6 Fig. 10 is an exploded perspective view illustrating a state in which a pre-filter assembly according to the embodiment of the present invention is opened;
• 7 is a cross-sectional view of the cleaner body;
• 8th is a top view of the cleaner body from which the cover member is removed;
• 9 Fig. 10 is an exploded perspective view showing a coupling structure of the cleaner body, a moving wheel and a detecting part viewed in one direction;
• 10 Fig. 10 is an exploded perspective view showing the coupling structure of the cleaner body, a moving wheel and a detecting part viewed from another direction;
• 11 Fig. 10 is a side view showing an installed state between the cleaner body and a wheel gear assembly;
• 12 is a side view of the cleaner body;
• 13 is a bottom view of the cleaner body;
• 14 Fig. 10 is an exploded perspective view illustrating a coupling structure of a rear wheel unit according to the embodiment of the present invention;
• 15 Fig. 10 is a cross-sectional view showing an operating state of the rear wheel unit;
• 16 Fig. 10 is a rear view showing a state in which a back cover of the cleaner body is opened;
• 17 Fig. 10 is an exploded perspective view illustrating a coupling structure of a battery and a filter according to the embodiment of the present invention;
• 18 is a cross-sectional view of the cleaner body before the battery is installed;
• 19 Fig. 10 is a cross-sectional view of the cleaner body in a state where the battery is installed;
• 20 is a perspective view of the cover member;
• 21 is an exploded perspective view of the cover member;
• 22 Fig. 10 is a partial cross-sectional view showing a coupling structure of the cover member and an obstacle detection member;
• 23 is an exploded perspective view illustrating a coupling structure of a lock assembly according to the embodiment of the present invention;
• 24 is a perspective view illustrating a state before the lock assembly is operated;
• 25 is a cross-sectional view showing the state before the lock assembly is operated;
• 26 is a perspective view showing an operating state of the lock assembly;
• 27 is a cross-sectional view showing the operating state of the lock assembly;
• 28 Fig. 10 is a plan view of the cover member in which a display according to the embodiment is in an OFF state;
• 29 Fig. 10 is a plan view of the cover member in which a display according to the embodiment is in an ON state;
• 30 Fig. 10 is a perspective view showing a state in which the cover member is opened;
• 31 Fig. 10 is an exploded perspective view illustrating a coupling structure of a connection assembly according to the embodiment of the present invention;
• 32 Fig. 10 is a cross-sectional view showing a state of the connection assembly while the cover member is closed;
• 33 Fig. 10 is a cross-sectional view showing the state of the connection assembly while the cover member is opened;
• 34 is an enlarged view of an A section in 30 ;
• 35 Fig. 10 is a partial perspective view illustrating a structure of a cover member coupling portion and an arrangement of a display cable according to the embodiment of the present invention;
• 36 Fig. 10 is a view illustrating a cable arrangement state in a cover base of the cover member;
• 37 is a view showing a coupling structure of the wire with the cleaner body;
• 38 is a perspective view of the dust container;
• 39 is an exploded perspective view of the dust container;
• 40 Fig. 10 is an exploded perspective view illustrating a coupling structure of an upper cover and a lower cover of the dust container viewed from one side;
• 41 Fig. 10 is a cross-sectional view showing a state in which the top cover is opened;
• 42 Fig. 10 is an exploded perspective view illustrating the coupling structure of the top cover and the bottom cover of the dust container as viewed from another side;
• 43 Fig. 10 is a cross-sectional view showing a state in which the bottom cover is opened;
• 44 Fig. 10 is an exploded perspective view showing a coupling structure of the bottom cover and a dust compaction unit;
• 45 is an enlarged view of a B section in 41 ;
• 46 is a cross-sectional view showing a flow of air and dust in the cleaner body;
• 47 is a top view showing the flow of air and dust in the cleaner body;
• 48 is a view showing a stop state of the cleaner body;
• 49 is a view showing a driving state of the cleaner body;
• 50 is a view illustrating an obstacle bypass driving state of the cleaner body;
• 51 is a view illustrating a detection area of the obstacle detection element;
• 52 is a view illustrating a wall surface driving state of the cleaner body;
• 53 is a bottom view of a cleaner body according to the embodiment of the present invention;
• 54 Fig. 10 is an exploded perspective view illustrating a coupling structure of a rear wheel unit according to the embodiment of the present invention;
• 55 is an exploded perspective view of the rear wheel assembly;
• 56 Fig. 10 is a cross-sectional view showing an operating state of the rear wheel unit;
• 57 is a bottom view showing an operating state of the rear wheel unit;
• 58 Fig. 10 is a view showing a state in which a body part of the cleaner body is inclined forward;
• 59 Fig. 10 is a view showing a state in which the cleaner body is tilted backward;
• 60 is a view showing a structure of a holding part;
• 61 is a view sequentially illustrating a method in which a battery is coupled to the cleaner body; and
• 62 is a view sequentially illustrating a process in which a battery is separated from the cleaner body.

Mode of operation of the invention

Reference will now be made in detail to the embodiments of the present disclosure, examples of which are shown in the accompanying drawings. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, alternative embodiments included in other regressive inventions or falling within the spirit and scope of the present disclosure may be readily derived by addition, modification, and removal and will fully convey the concept of the invention to those skilled in the art.

1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention. And 2 is a view showing a state in which a cleaner body and a suction unit are separated.

As shown in the drawings, a vacuum cleaner 1 according to an embodiment of the present invention includes a cleaner body 10 and a suction unit 20.

A motor for generating suction is provided inside the cleaner body 10. And when the motor is driven and the suction force is generated, the suction unit 20 can direct air containing dust into the cleaner body 10.

The suction unit 20 may include a suction part 21 for sucking the dust on a surface to be cleaned, for example a floor surface, and a connecting part for connecting the suction part 21 to the cleaner body 10. The connecting part may include an extension pipe 22 connected to the suction part 21, a handle 23 connected to the extension pipe 22, and a suction hose 24 connecting the handle 23 to the cleaner body 10.

A fitting portion 241 that improves airtightness when connected to a connector 401 of the cleaner body 10 may be provided on the suction hose 24.

The fitting portion 241 may serve to install/disconnect the suction hose 24 to the connector 401. The fitting portion 241 may be formed in multiple stages as shown in the drawings.

The cleaner body 10 includes a body part 30 and a cover member 40, which form an entire exterior.

The cleaner body 10 may further include a motion wheel 60 rotatably coupled to the body portion 30. A pair of motion wheels 60 may be provided and may be coupled to both sides of the body part 30, respectively. And the moving wheel 60 holds the body part so that it is rotatable about a rotation center of the moving wheel 60.

A gripping portion 41 that is gripped by a user may be provided on the cover member 40. The user can grasp the gripping portion 41 when lifting or tilting the body part 30 or opening and closing the cover member 40.

A back cover 314 that can be opened and closed may be provided on a rear surface of the body part 30. The back cover 314 can be designed to cover a space in the To open and close the interior of the body part 30, in which a battery unit 38 and a filter unit 39 are accommodated.

The cleaner body 10 further comprises a dust container 50 in which the dust sucked by the suction unit 20 is stored. The dust container 50 may be formed in a cylindrical shape as shown in the drawings, but is not limited to this. And the dust container 50 may be separably provided on a front surface of the body part 30.

And 3 is a view showing a state in which the dust container is separated from the cleaner body 10. And 4 is a view showing a state in which the cover member of the cleaner body 10 is opened.

As shown in the drawings, the dust container 50 may be separably installed on a receiving part 32 formed in a first half portion of the body part 30. The dust container 50 may form a part of the front surface of the body part 30 while installed on the receiving part 32. And the dust container 50 can be installed or separated by opening and closing the cover member 40.

A suction opening 511 through which the dust is sucked may be provided on the dust container 50. The suction port 511 may be arranged on an upper surface portion of the dust container 50. Consequently, the air introduced through the suction port 511 is directed downward and then moved to a dust collecting space inside the dust container 50.

The dust container 50 may be separably installed on the body part 30. The dust collection space in which the dust introduced through the suction port 511 is collected may be formed inside the dust container 50.

The dust container 50 may be provided on a front side of the body part 30, and at least a part of a side surface portion of the dust container 50 may be formed of a transparent material to enable the user to inspect the dust collected in the dust collection space.

When the dust container 50 sits on the receiving part 32, the side surface portion may be exposed through the front surface of the body part 30. At this point, an exposed portion of the dust container 50 is formed from a transparent upper end of the side surface portion of the dust container 50 to its lower end, and thus the entire dust collection space can be inspected without separating the dust container 50.

A dust separation structure that separates the dust from the air sucked by the suction unit 20 may be provided inside the dust container 50, and the dust separated by the dust separation structure may be collected in a lower portion of the dust container 50.

The connector 401 is directly connected to the suction hose 24 and the air containing the dust can be introduced through it. That is, one side of the connector 401 is coupled to the suction hose 24, and its other side is coupled to the suction port 511. Therefore, the connector 401 connects the suction hose 24 to the suction opening 511.

The connector 401 can be in connection with the dust container 50. Consequently, the air introduced into the suction hose 24 can be introduced into the dust container 50 via the connector 401.

The suction opening 511 through which the dust is introduced may be provided on one side of the dust container 50. As shown in the drawings, the suction port 511 may be provided in an upper portion of the dust container 50. And the suction port 511 may be formed to face forward. Here, the term “forward” may be a section where the suction hose 24 is arranged based on the cleaner body 10.

As shown in the drawings, the connector 401 may be disposed at the upper portion of the dust container 50. Since both the suction port 511 and the connector 401 are disposed at the upper portion of the dust container 50, a passage length of the air introduced from the suction hose 24 can be minimized.

The cleaner body 10 further includes the cover element 40, which is movably provided on the body part 30. The cover member 40 may form at least a portion of an upper surface of the cleaner body 10 and may be configured to open and close an upper surface of the body portion 30. At this point, a rear end of the cover member 40 may be shaft-coupled to the body part 30 to be rotatable, and thus the user can open the cover member 40 by grasping and rotating the gripping portion 41.

The connector 401 may be provided on the cover member 40. Therefore, the connector 401 can be used together with the cover element 40 be moved. The cover element 40 can shield at least one side of the dust container 50. The cover member 40 may shield at least one side of the dust container 50 and may also be coupled to the dust container 50. The cover member 40 can be coupled to the dust container 50 when it is closed and can be separated from the dust container 50 when it is opened. For example, the cover member 40 may be coupled to the upper portion of the dust container 50.

While the cover member 40 is in a closed state, the fitting portion 241 of the suction hose 24 connected to the connector 401 of the cover member 40 may communicate with the suction port 511 of the dust container 50. Therefore, the dust and air sucked by the suction unit 20 can pass through the connector 401 of the cover member 40 and then be introduced into the dust container 50 through the suction port 511.

And while the cover member 40 is in an opened state, the fitting portion 241 of the suction hose 24 can be kept in a connected state with the connector 401 of the cover member 40, and the cover member 40 and the dust container 50 can be separated. Therefore, while the cover member 40 is in the opened state, the dust container 50 may be separable from the receiving part 32.

Hereafter, the cleaner body 10 will be described more specifically.

5 is an exploded perspective view of the cleaner body 10. And 6 is an exploded perspective view illustrating a state in which a pre-filter assembly according to the embodiment of the present invention is opened. And 7 is a cross-sectional view of the cleaner body 10. And 8th is a top view of the cleaner body 10 from which the cover member is removed.

As shown in the drawings, the cleaner body 10 includes the body part 30 and the cover member 40, and may be configured such that the dust container 50 is installed on the body part 30.

And the body part 30 may include a base 31 that forms a bottom of the cleaner body 10 and provides a space in which the dust container 50, the battery unit 38, the filter unit 39 and a main motor 35 are installed.

The base 31 may include a first half portion 312, a middle portion 311, and a second half portion 313, may be formed to have a predetermined width, and thus may provide the space in which the dust container 50, the battery unit 38, the filter unit 39 and so on are installed.

The middle portion 311 may be formed in a flat surface shape and may be disposed between the first half portion 312 and the second half portion 313. At this point, the first half portion 312 and the second half portion 313 may be formed to extend obliquely on the base of the middle portion 311, and may be formed to extend in a direction away from an end of the middle portion 311 , gradually become higher.

A terminal installation portion 311a on which a power supply terminal 307 is disposed may be formed at an end of the center portion 311, i.e., a position adjacent to the moving wheel 60. The terminal installation portion 311a may be formed to be recessed so that its lower surface is opened, and may also be formed to be connected to a terminal of a charging device when the battery unit 38 of the vacuum cleaner 1 is charged.

And a rear wheel unit 70 may be provided at a position of the middle portion 311 adjacent to the second half portion 313. The rear wheel unit 70 can prevent the cleaner body 10 from tipping backwards while the vacuum cleaner 1 is in use. The rear wheel unit 70 can allow the base 31 to be held at a fixed angle while in a stopped state. For this purpose, the rear wheel unit 70 may be configured to be in contact with the ground and the center portion 311 while the cleaner body 10 is in the stopped state of not running, with the cleaner body 10 being elastically held.

The first half portion 312 is formed at a front end of the middle portion 311. The first half portion 312 extends from one end of the middle portion 311 to be inclined upward, and the accommodating part 32 constituting the space for accommodating the dust container 50 may be provided in the first half portion 312.

The receiving part 32 may include a lower surface portion 321 forming its lower surface and a peripheral portion 322 extending upward along the periphery of the lower surface portion 321. The Perimeter portion 322 is formed to be opened forward so that the dust container 50 is installed therein.

A compaction motor assembly 323 for driving a dust compaction unit 56 inside the dust container 50 may be provided between the lower surface portion 321 and the first half portion 312. When the dust container 50 is installed on the receiving part 32, the compaction motor assembly 323 and the dust compaction unit 56, which will be described in detail below, are connected to each other, and thus the dust compaction unit 56 is in a drivable state.

The compression motor assembly 323 may include a compression motor 323a that provides rotational power and a compression gear 323b connected to a rotation shaft of the compression motor 323a. The compression gear 323b may be disposed at a position eccentric to one side from a center of the lower surface portion 321. And an opened lower surface hole 321a may be formed in the lower surface portion 321, and a first transmission gear 591 described later may be disposed on the lower surface hole 321a when the dust container 50 is attached. Therefore, when the dust container 50 is installed, the compression gear 323b is coupled to the first transmission gear 591 to transmit power of the compression motor 323a.

A front wheel 312a may be installed on a lower surface of the first half portion 312. The front wheel 312a is arranged a little further to a front than a center of the first half portion 312 and allows the cleaner body 10 to be easily moved over an obstacle when the obstacle, such as a carpet or a door sill, is in front of the cleaner body 10. that is being moved. And when the cleaner body 10 is tilted forward, the front wheel 312a can be rotated in a contact state with the ground, so that the cleaner body 10 is prevented from tipping forward.

The second half portion 313 may also be formed such that it slopes upward from a rear end of the middle portion 311. Therefore, when the cleaner body 10 starts moving forward to drive, the vacuum cleaner 1 is tilted using the moving wheel 60 as an axis, and thus the cleaner body 10 is rotated slightly.

And at least a part of a rear opening 317 that is opened and closed by the rear cover 314 may be formed on the second half portion 313. The back cover 314 forms the same curved surface as that of a lower trim 315 and an upper trim 37, which form an exterior of each of the second half portion 313 and the cleaner body 10 while shielding the rear opening 317. The back cover 314 may be formed as a part of the second half portion 313 so that it has the same slope or curved surface as that of the second half portion 313.

The back cover 314 may form part of the rear surface of the body part 30. And a lower end of the back cover 314 may be rotatably coupled to the second half portion 313 and may open and close the rear opening 317 by rotation. And a vent through which the air separated from the dust while passing through the interior of the cleaner body 10 is discharged may be formed on the back cover 314, and thus the air from which the dust is filtered can be discharged .

Meanwhile, a base frame is installed at a center of the base 31. The base frame is configured to divide a space in which the dust container 50 is disposed into a space in which the main motor 35 is provided and a space in which the battery unit 38 and the filter unit 39 are provided.

In particular, the base frame may include a lower frame 33 and an upper frame 34.

The lower frame 33 is installed in the middle portion 311 and may include a first barrier 331 dividing a part of an interior space of the body part 30 front and rear, and a pair of side walls 332 each extending from both ends of the first barrier 331. include. And the main motor 35, a wheel motor assembly 63, the compression motor assembly 323, an obstacle detection element 44 and a main PCB 301 (PCB: printed circuit board) for controlling a general drive of the vacuum cleaner 1 may be provided on a front surface of the first barrier 331.

A lower receiving member 300 may be provided on the front surface of the first barrier 331. The lower receiving member 300 may be formed such that its center is recessed to hold a side surface of the dust container 50 when the dust container 50 is installed. And the main PCB 301 installed on the front surface of the first barrier 331 is, can be accommodated inside the lower receiving element 300.

A noise filter 302 for removing noise of the input power supplied to the main PCB 301 is provided on a rear surface of the first barrier 331. The noise filter 302 may be an EMI filter (EMI: electromagnetic interference suppression).

At this point, a first barrier hole 331a serving as a passage for the air is formed on the first barrier 331 between the main PCB 301 and the noise filter 302. Therefore, the main PCB 301 and the noise filter 302 can be naturally cooled by the air passing through the first barrier hole 331a.

The lower frame 33 is opened upward and downward while installed on the base 31, and the upper frame 34 is installed at an upper end of the lower frame 33. And the upper frame 34 shields an opened upper surface of the lower frame 33 and forms the space in which the battery unit 38 and the filter unit 39 are housed. And the space in which the main motor 35 for sucking the air is provided is also formed.

In particular, the upper frame 34 may include a cover plate 341, a second barrier 342 and a second sidewall 343.

The second barrier 342 divides an upper space of the body part 30 into a front portion and a rear portion, and forms on its front side a space in which a pre-filter assembly 36 connected to the dust container 50 is provided, and also forms a space on its rear side to which the main motor 35 is provided.

And a second barrier hole 342a may be formed on the second barrier 342, and thus fine dust can be filtered while the air that has passed through the dust container 50 passes through the pre-filter assembly 36 when the main motor 35 is driven, and the filtered air passes through, while it passes through the pre-filter arrangement 36, the main motor 35.

A front barrier wall 344 extending forward is formed at both ends of the second barrier 342 and forms a space in which the prefilter assembly 36 is received.

The pre-filter assembly 36 may include a pre-filter housing 361 in close contact with the dust container 50 and a pre-filter body 362 coupled to the pre-filter housing 361 and in which a filter element 363 is received.

The pre-filter housing 361 and the pre-filter body 362 may form a space therein to accommodate the filter element 363 while coupled to each other, and may also be rotatably coupled to each other to be opened and closed. Therefore, the filter element 363 can be installed on or separated from the pre-filter body 362 after the pre-filter housing 361 is opened.

The filter element 363 serves to secondarily filter the fine dust that is not filtered by the dust container 50 in which the dust and foreign substances are primarily filtered, and is designed to filter the fine dust in the air introduced into the main motor 35 , to remove. Meanwhile, the air that has passed through the filter element 363 and the main motor 35 can cool the battery unit 38 and can then be discharged to the outside after the fine dust is tertiary filtered in the filter unit 39, which will be described in detail.

The pre-filter assembly 36 is described with reference to 6 described in more detail. The pre-filter assembly 36 has a structure in which the filter element 363 is accommodated in the pre-filter body 362 and is shielded by the pre-filter housing 361.

The pre-filter housing 361 may be exposed forward while the pre-filter assembly 36 is installed on the upper frame 34. And a front surface of the pre-filter case 361 is formed to have a curved surface corresponding to an outer surface of the dust container 50. Therefore, when the dust container 50 is installed on the body part 30, the exposed front surface of the pre-filter housing 361 surrounds and supports the outer surface of the dust container 50. At this point, the front surface of the pre-filter housing 361 may be formed to be inclined and thereby according to one Inclination state of the dust container 50 is in contact with the outer surface of the dust container 50. Therefore, when the dust container 50 is installed, the dust container 50 can be maintained in a stably maintained state due to the front surface of the pre-filter case 361.

A filter hole 361a is formed in a position of the pre-filter housing 361 corresponding to a discharge opening 512 of the dust container 50. The filter hole 361a may be formed to have a size and a shape corresponding to those of the discharge opening 512. And a housing seal 361b, which is in close contact with a The circumference of the discharge opening 512 is formed around the filter hole 361a, so that the dust container 50 and the pre-filter housing 361 are in close contact with each other, and thus the air is prevented from escaping.

A locking groove 361c is further formed on the pre-filter housing 361. The locking groove 361c accommodates an upper latch 57 arranged to protrude from the outer surface of the dust container 50 when the dust container 50 is installed on the body part 30. Therefore, the lock groove 361c may be formed to correspond to a protruding shape of the upper lock 57.

A first restriction portion 361d, which allows the pre-filter body 362 to be kept in a closed state, may be formed on both side surfaces of the pre-filter case 361. The first restriction portion 361d may be formed in a recessed shape to accommodate a second restriction portion 362c described later, and a restriction projection 361e may be formed on the first restriction portion 361d to protrude.

Meanwhile, a housing seal 361g may be further provided on a periphery of an opened rear end of the pre-filter housing 361. The housing seal 361g may be in close contact with a front surface of the second barrier 342 and may allow the air passing through the pre-filter assembly 36 to pass through the second barrier hole 342a without escaping.

A first rotary coupling portion 361f may be formed at a lower end of the pre-filter housing 361. The first rotary coupling portion 3 61f serves to enable the pre-filter case 361 and the pre-filter body 362 to be rotatably connected, and a pair of the first rotary coupling portions 361f may protrude from the lower end of the pre-filter case 361. And a second rotary coupling portion 362e may be disposed between the pair of first rotary coupling portions 361f, and the first rotary coupling portions 361f may be shaft-coupled to both ends of the second rotary coupling portion 362e.

The pre-filter body 362 may include a body vent 362a having a front surface opened and a rear surface formed in a vent shape and in close contact with the second barrier 342, and a body flange 362b extending along a periphery of the body vent 362a and the pre-filter housing 361 accommodates.

If necessary, a seal may be provided on the periphery of the body ventilation grille 362a so that the second barrier 342 and the pre-filter body 362 are in intimate contact with each other in an airtight manner. And the body ventilation grille 362a may be formed in the ventilation grille shape so that the air introduced through the filter hole 361a passes through the filter element 363 and then passes through the second barrier hole 342a.

The body flange 362b may be in close contact with an outer surface of the pre-filter housing 361, and may be formed such that a width of its lower end is larger than that of its upper end and its side surface is inclined to enable the pre-filter housing 361 to be inclined state is coupled. And the second restriction portion 362c fitted on the first restriction portion 361d may be formed on both side surfaces of the body flange 362b.

The second restriction portion 362c may be formed to protrude forward from both sides of the body flange 362b, and may be formed in a shape that is accommodated in the first restriction portion 361d. And a restriction hole 362d is formed on the second restriction portion 362c. The restriction hole 362d serves to allow the restriction projection 361e to be inserted therein when the second restriction portion 362c is accommodated in the second restriction portion 362c, thereby allowing the pre-filter case 361 and the pre-filter body 362 to be kept in a closed state.

And the second rotational coupling portion 362e may be formed at the lower end of the body flange 362b. The second rotary coupling portion 362e is rotatably coupled to the first rotary coupling portion 361f and is also formed such that the pre-filter housing 361 and the pre-filter body 362 are rotated about the first rotary coupling portion 361f and the second rotary coupling portion 362e, respectively. Therefore, the pre-filter case 361 can be opened and closed by rotating around a lower end of the pre-filter body 362, and can replace the filter element 363 after the pre-filter body 362 is opened.

Various types of filters that can collect a variety of fine dust may be used as the filter element 363, and the filter element 363 may be formed in a shape that is accommodated in an interior space of the pre-filter body 362.

The pre-filter assembly 36 can be installed on the upper frame 34 while receiving the filter element 363, can hold the dust container 50 while installed on the upper frame 34, and can allow the air that has passed through the dust container 50 is filtered secondarily and then fed to the main motor 35.

A pair of second sidewalls 343 may extend rearwardly from a rear surface of the second barrier 342. The second side walls 343 may form the space in which the main motor 35 is arranged, and may also form a space in which a sub PCB 305 is arranged.

Specifically, the main motor 35 may be provided between the pair of second side walls 343, and the sub PCB 305 may be installed on an outer surface of one of the second side walls 343. That is, the main motor 35 and the sub PCB 305 can, as in 8th shown, each be installed in the rooms that are divided based on the second side walls 343.

Meanwhile, the second barrier hole 342a may be formed in a region between the pair of second side walls 343. Therefore, all the air passing through the second barrier hole 342a can pass through the main motor 35.

And a plate hole 341a may be formed on the cover plate 341 constituting a bottom of the upper frame 34. The plate hole 341a may be formed in an area between the pair of second side walls 343. Therefore, the air introduced into the space for accommodating the main motor 35 through the second barrier hole 342a can be introduced into the space formed on the lower frame 33 to accommodate the battery unit 38 through the plate hole 341a, and can Cool battery unit 38.

The main motor 35 is provided in a space formed by the upper frame 34 and further disposed on a rear side as a center of gravity of the body part 30 and a center of the moving wheel 60. Consequently, due to an installation structure of the main motor 35, a load is applied so that a rear end of the body part 30 is lowered by a weight of the main motor 35 while no external force is provided.

And since the main motor 35 is arranged longitudinally in forward and backward directions, the center of gravity of the body part 30 can be arranged further to a rear than the rotation center of the moving wheel 60 and can provide a torque for rotating the body part 30 in the clockwise direction.

Meanwhile, the main motor 35 has a structure in which a fan and a motor are coupled inside a casing to guide the flow of air. Various structures that force the air flow can be applied as such a structure of the main engine 35.

And the main motor 35 can be installed and fixed to the upper frame 34 through a motor holding member 351. The motor holding member 351 may be formed of a rubber material or a material having elasticity, can reduce vibrations generated when the main motor 35 is driven, and thus can reduce noise.

An engine cover 352 surrounding at least a part of the main engine 35 may be further provided on a rear side of the main engine 35. A plurality of holes may be formed on the motor cover 352, and thus the air forcibly blown from the main motor 35 can pass through. And a sound absorbing material may be further provided between the engine cover 352 and the main engine 35 and may reduce the noise generated when the main engine 35 is driven.

And the main motor 35 is arranged in the space formed by the upper frame 34 so that it leans on a side on which the sub PCB 305 is provided. That is, the main motor 35 is disposed adjacent to one of the pair of second side walls 343 on which the sub PCB 305 is installed. Consequently, a relatively wide space can be formed between the main motor 35 and one of the second side walls 343 remote from the sub PCB 305.

At least a part of the board hole 341a may be exposed through a region between the main motor 35 and the second side wall 343 spaced from the sub PCB 305. Also, the first barrier hole 331a may be formed in a region having the same extension line as that of the plate hole 341a.

Therefore, the air discharged by the main engine 35 can be discharged through the engine cover 352. Since one of both lateral directions is blocked by the adjacent second side wall 343, the air naturally flows through a space between the other second side wall 343, each of which has the plate hole 341a. Since the air is allowed to flow smoothly to the first barrier hole 331a, the flow noise can be reduced.

Meanwhile, a frame cover 36 may be provided on the upper frame 34. The frame cover 36 may be configured to shield an opened upper surface of the upper frame 34. Therefore, while the frame cover 36 is installed, the space in which the main motor 35 is accommodated can be sealed, and all the air that passes through the second barrier hole 342a by driving the main motor 35 can pass through the main motor 35 and then can to the plate hole 341a.

Meanwhile, the sub PCB 305 may be provided on one of the pair of second side walls 343. The sub-PCB 305 controls the drive of a sub-motor 201 that drives a stirrer inside the suction unit 20. A BLDC motor (BLDC motor: brushless direct current motor), which is inexpensive and easy to control, can be used as the sub motor 201, and the sub PCB 305 can reduce a voltage of the input power, making it suitable for the sub motor 201 is, and can then supply the input power to the secondary motor 201.

The sub PCB 305 may be provided in a separate space of the upper frame 34 apart from the main PCB 301 and thus may be installed if necessary. That is, when the sub motor 201 is not provided on the suction unit 20, the sub PCB 305 cannot be installed, and thus the main PCB 301 can be used normally.

Meanwhile, an upper portion of the cleaner body 10 may be formed by the upper decoration 37. The upper ornament 37 can shield an opened upper portion of the base 31 and thus shield internal elements installed on the base 31. And the upper ornament 37 forms a part of an exterior of the upper surface of the cleaner body 10 and forms an upper exterior of the cleaner body 10 except its portion shielded by the cover member 40, the moving wheel 60 and the dust container 50.

And the upper ornament 37 may be coupled to the lower ornament 315 described below, and may form a part of an exterior of a side surface of the cleaner body 10 by being coupled to the lower ornament 315.

9 Fig. 10 is an exploded perspective view showing a coupling structure of the cleaner body 10, the moving wheel and a detecting part viewed in one direction. 10 Fig. 10 is an exploded perspective view showing the coupling structure of the cleaner body 10, the moving wheel and the detecting part viewed from a different direction. 11 is a side view showing an installed state between the cleaner body 10 and a gear assembly. And 12 is a side view of the cleaner body 10.

As shown in the drawings, a pair of side portions 316 formed to extend upward are formed at both side ends of the base 31, respectively. The side portions 316 may provide a space in which the moving wheel 60 and the wheel motor assembly 63 for driving the moving wheel 60 are installed. The pair of side portions 316 may be provided on both of the left and right sides, and a structure in which the wheel motor assembly 63 is installed may be the same as that in which the moving wheel 60 is installed.

Each of the side portions 316 may extend to a position higher than the center of the moving wheel 60 and may be made smaller than the moving wheel 60. A wheel hub 316a in which the moving wheel 60 is rotatably installed may be provided at a center of each of the side portions 316. The wheel hub 316a may extend from the side portion 316 toward the center of the moving wheel 60. While the moving wheel 60 is installed on the wheel hub 316a, the moving wheel 60 can be rotated by the wheel motor assembly 63 and a wheel gear 64. And the cleaner body 10 can also be in a rotatable state using the wheel hub 316a as an axle.

And the wheel motor assembly 63 may be provided on a lateral side of the wheel hub 316a. When the motion wheel 60 is installed on the wheel hub 316a, the wheel motor assembly 63 can be shielded by the motion wheel 60. That is, the wheel motor assembly 63 may be provided in a space formed between the side portion 316 and the moving wheel 60.

The wheel motor assembly 63 may include a wheel motor 632, a wheel motor housing 631, and a plurality of movable gears (not shown) provided inside the wheel motor housing 631 to transmit power to the wheel gear 64.

The wheel motor 632 can be constructed with a BLCD motor whose rotation is easy to control and which is lightweight. And the plurality of movable gears connecting a rotation shaft of the wheel motor 632 to the wheel gear 64 of the moving wheel 60 slow down the rotation of the wheel motor 632 and then transmit the rotation to the moving wheel 60.

Meanwhile, the wheel motor assembly 63 may be installed further on a back side than the rotation center of the moving wheel 60. Specifically, a housing installation groove 633 recessed inward may be formed on the wheel motor housing 631. The housing installation groove 633 is recessed in a shape corresponding to the wheel hub 316a and formed to accommodate at least a part of the wheel hub 316a. That is, while the wheel motor assembly 63 is installed, the housing installation groove 633 is installed to surround a second half portion of an outer surface of the wheel hub 316a and is disposed on a back side of the wheel hub 316a. Therefore, the wheel motor assembly 63 can enable the center of gravity of the cleaner body 10 to be located on a more rearward side while being installed on the cleaner body 10.

And the wheel motor 632 is arranged at a lower portion of the wheel motor housing 631, and the plurality of movable gears are arranged above the wheel motor 632. That is, since the wheel motor 632, which is relatively heavy, is arranged on the lower side, the center of gravity of the cleaner body 10 can be arranged on a further lower side.

The lower ornament 315, which forms the exterior of the body part 30 exposed to the outside of the moving wheel 60, may be installed on the side portion 316. The bottom ornament 315 may be formed along at least a portion of a perimeter of the motion wheel 60, may be formed to have a curved surface that continues to a curved surface of the motion wheel 60, and thus may form a smooth exterior.

A plurality of reinforcing ribs 316b extending vertically may be further formed on an inner surface of the side portion 316, i.e., a surface opposite to a surface on which the wheel hub 316a is formed. Since the plurality of reinforcing ribs 316b are formed, the side portion 316 can be prevented from being damaged by a load applied laterally. And the moving wheel 60 can be kept in a stably coupled state.

Meanwhile, a detection part 306 may be further provided on a side of the inner surface of the side portion 316. The detection part 306 can detect a moving state or a position of the cleaner body 10 and can control the driving of the moving wheel 60. The detection part 306 serves to detect the movement of the cleaner body 10 and may include a gyro sensor or an acceleration sensor, which is typically widely used. Of course, instead of the gyro sensor or the acceleration sensor, various sensors or devices that detect the movement of the cleaner body 10 may be used as the detecting part 306.

The detection part 306 may be installed on an upper portion of the inner surface of the side portion 316. The detection part 306 may include a detection PCB 360a on which the gyro sensor is mounted and a detection part fixing member 306b that fixes the detection PCB 360a, and is installed on the side portion 316. And a pair of fixing hooks 306c may be provided on the detection part fixing member 306b, and may be inserted into and fixed in detection part fixing holes 316c formed on the side portion 316.

Meanwhile, the sensing PCB 360a may be configured to control the drive of the wheel motor 632 provided on both sides thereof. That is, a structure for controlling the gyro sensor and the wheel motor 632 may be constructed with a PCB.

As described above, the detection part 306 may be installed and fixed to the side portion 316, and an installation position of the detection part 306 may be arranged on a side distant from the rotation center of the moving wheel 60 used as the rotation shaft of the cleaner body 10 is. Therefore, when the cleaner body 10 is driven or stopped, an angle of rotation, i.e. an inclination of the cleaner body 10, can be effectively detected.

While the cleaner body 10 is in the stopped state, its center of gravity is located behind the center of the moving wheel 60. Therefore, the cleaner body 10 is maintained in a state intended to rotate clockwise based on the center of the moving wheel 60. And the cleaner body 10 is maintained in a state of being held by the rear wheel unit 70 in contact with the ground. Consequently, a lower surface of the cleaner body 10, in particular the first half ten section 312, are held at a predetermined angle.

In this state, the detection part 306 determines whether the cleaner body 10 is driven or stopped by the inclination of the cleaner body 10, i.e. the angle of the first half section 312.

In particular, the wheel motor assembly 63, the battery unit 38 and the main motor 35 may be arranged behind the center of the moving wheel 60. Therefore, the center of gravity G of the cleaner body 10 is located further to a back than the rotation center C of the moving wheel 60, and thus the cleaner body 10 is naturally in the state in which it is intended to rotate clockwise based on the center of the moving wheel 60.

And the second half portion 313 of the cleaner body 10 can be held by the rear wheel unit 70 installed in the second half portion 313 of the base 31. Therefore, the cleaner body 10 can be prevented from being excessively rotated clockwise and can be stably maintained at a target angle α.

Specifically, due to a characteristic of the vacuum cleaner 1, the dust is accumulated in the dust container 50 after the vacuum cleaner 1 is used. Taking this fact into account, the center of gravity of the cleaner body 10 is always located in its second half portion and is held by the rear wheel unit 70, and thus the cleaner body 10 can maintain a constant inclination with respect to the ground regardless of an amount of dust while stopped condition is.

When the detecting part 306 detects an angle of the first half portion 312 in this state and confirms that the first half portion 312 maintains the target angle α, it is determined that the cleaner body 10 maintains a fixed position in the stopped state. Therefore, the main PCB 301 controls that the wheel motor assembly 63 is not operated, thereby maintaining the stopped state of the cleaner body 10.

Meanwhile, when the user grasps the handle 23 and moves forward to use the vacuum cleaner 1, the cleaner body 10 is tilted due to a position of the handle 23. That is, the cleaner body 10 is rotated counterclockwise so that the first half portion 312 is moved further downward.

At this point, the detection part 306 detects a change in the angle of the first half portion 312 and, according to the change in the angle, determines a fact that the movement of the vacuum cleaner 1 begins. Therefore, the main PCB 301 can determine that the cleaner body 10 is moved, and thus can rotate the moving wheel 60 by driving the wheel motor assembly 63.

And when the movement of the cleaner body 10 is stopped again, the cleaner body 10 is rotated to an initial state by the center of gravity, and the detecting part 306 checks a fact that the angle of the first half portion 312 coincides with the target angle α in the stopped state. Therefore, the main PCB 301 can determine that the movement of the cleaner body 10 is completed and can control the wheel motor assembly 63 to stop it.

Meanwhile, the lower surface of the cleaner body 10, that is, the middle portion 311, the first half portion 312 and the second half portion 313 of the base 31, as shown in FIG 11 shown have a predetermined angle. The angle of each of the middle section 311, the first half section 312 and the second half section 313 can be set in various ways. Hereafter, the angle of the base 31 in the stopped state of the cleaner body 10 will be described.

For example, the first half portion 312 may be formed such that it is inclined at an angle of 27° with respect to the ground. The first half portion 312 can hardly collide with the ground by allowing the first half portion 312 to have the angle of 27° even when the suction hose 24 is pulled and the cleaner body 10 is rotated. Of course, the first half portion 312 may be in contact with the ground due to unexpected operation. In this case, the movement of the cleaner body 10 can be smoothly performed by rolling movement of the front wheel 312a. Likewise, due to the inclination of the first half portion 312, the first half portion 312 can be easily moved over the carpet, door sill, or the like while the cleaner body 10 is being driven.

And the center portion 311 may be formed to be inclined at an angle of 7° with respect to the ground while the cleaner body 10 is in the stopped state. When the moving wheel 60 is rotated by the drive of the wheel motor 632, and thus the cleaner body 10 is moved, the cleaner body 10 is rotated by an angle of approximately 7° in the counterclockwise direction. While the cleaner body 10 is being driven, the middle section 311 is therefore in a hori zontal state to the floor, and thus the bottom of the vacuum cleaner 1 can be prevented from being trapped by foreign substances or the like in a room.

And the second half portion 313 may be formed to be inclined at an angle of 10° with respect to the ground while the cleaner body 10 is in the stopped state. Therefore, the cleaner body 10 can be rotated clockwise around the center of gravity of the cleaner body 10 which is eccentric to a back side while the cleaner body 10 is in the stopped state and then can be placed on the ground.

That is, in the stopped state, the cleaner body 10 is already in a state in which its second half portion 313 is displaced downward due to the center of gravity, and thus can be stably moved by the rear wheel unit 70 regardless of the amount of dust stored in the dust container 50 maintained state.

Also, due to the inclined second half portion 313, the second half portion 313 can be prevented from colliding with the ground when the suction hose 24 is pulled and the cleaner body 10 is rotated, and thus the rotation of the cleaner body 10 can be prevented from being restricted.

Meanwhile, the moving wheel 60 may include a wheel frame 61 rotatably installed on the wheel hub 316a of the side portion 316 and to which the wheel gear 64 is installed, and whose wheel trim 62 forms an exterior of the moving wheel 60 by being coupled to an outer surface of the wheel frame 61 is.

The wheel frame 61 forms a substantial framework of the moving wheel 60 and performs the rolling motion while in contact with the ground, and a plurality of ribs 611 for reinforcing overall strength may be radially provided on its inner surface and on its outer surface. Also, a wheel gear installation portion 612 to which the wheel gear 64 is attached is formed at a center of the wheel frame 61. The wheel gear 64 may be rotatably installed on the wheel hub 316a while being attached to the wheel frame 61.

Meanwhile, a wheel hole 621 is formed at a center of the wheel ornament 62, and a coupling member through which the wheel gear 64 and the wheel frame 61 are coupled can be fixed through the wheel hole 621. And a wheel cap 623 may be installed on the wheel opening 621 and may shield the wheel opening 621.

Meanwhile, the cleaner body can be 10 in 12 can be divided into a front and a back by a vertical extension line Lv extending vertically to the ground (or ground surface) based on the rotation center C of the moving wheel 60.

And the cleaner body 10 can be divided into a top and a bottom by a horizontal extension line LH extending horizontally with the ground (or ground surface) on a base between the main motor 35 and the battery unit 38.

The cleaner body 10 can be divided into four areas, i.e. four squares, by the vertical extension line Lv and the horizontal extension line LH.

Hereinafter, main structures of the cleaner body 10 will be described based on the vertical extension line Lv and the horizontal extension line LH.

The main motor 35 can be arranged in a first quadrant of the cleaner body 10, i.e. on a back side of the vertical extension line Lv and a top side of the horizontal extension line LH. And the battery unit 38 may be arranged in a fourth quadrant of the cleaner body 10, i.e. on a back side of the vertical extension line Lv and a bottom side of the horizontal extension line LH. And a hole formed at a position where the connector 401 or the suction hose 24 is connected may be disposed in a second quadrant of the cleaner body 10, that is, on a front side of the vertical extension line Lv and the top of the horizontal extension line LH . And at least a part of a lower surface of the dust container 50 may be arranged in a third quadrant of the cleaner body 10, i.e. on the front of the vertical extension line Lv and the bottom of the horizontal extension line LH.

Due to such an arrangement, the center of gravity G of the entire cleaner body 10 can be arranged on the back of the vertical extension line Lv. At this time, the center of gravity G may be located on any of the top and bottom of the horizontal extension line LH. However, the center of gravity G should be located at a position where a rear end of the cleaner body 10 or the rear wheel unit 70 is rotatable to be in contact with the ground.

Also, the center of gravity G may be arranged such that the rear end of the cleaner body 10 or the rear wheel unit 70 is in contact with the ground regardless of the amount of dust collected in the dust container 50 by the use of the vacuum cleaner 1 while the vacuum cleaner 1 is stopped condition is.

Likewise, the wheel motor arrangement 63 can also be arranged on the back of the vertical extension line Lv, so that the center of gravity G is more easily arranged on the back.

13 is a bottom view of the cleaner body 10. And 14 is an exploded perspective view showing a coupling structure of a rear wheel unit 70. And 15 is a cross-sectional view showing an operating state of the rear wheel unit 70.

As shown in the drawings, the rear wheel unit 70 may be provided on the base 31. A base recess portion 311b recessed inwardly is formed at the rear end of the center portion 311 of the base 31. And a wheel installing portion 311c for installing the rear wheel unit 70 is formed at a front end of each of both side surfaces of the base recess portion 311b.

The rear wheel unit 70 is in contact with the ground while the cleaner body 10 is not moved, and allows the cleaner body 10 to be held in a fixed position. And the rear wheel unit 70 is in contact with the ground while the cleaner body 10 is rotated, so that the first half portion 312 is raised, also provides elasticity for the backward rotation of the cleaner body 10, and thus can prevent the cleaner body 10 from being excessively rotated or overturned becomes.

The rear wheel unit 70 may include a wheel carrier 71 and a rear wheel 72. The wheel carrier 71 allows the rear wheel 72 to be rotatably installed and also in contact with a lower surface of the base 31, thereby providing a predetermined elasticity.

Specifically, the wheel carrier 71 may include a pair of legs 73 provided on both left and right sides, a wheel receiving portion 74 connecting front ends of the legs 73 and to which the rear wheel 72 is installed, and an elastic portion 75 provided between the Legs 73 are provided and are in contact with the base 31 to provide elasticity.

The legs 73 serve to install the wheel carrier 71 and may be provided on both sides spaced apart from each other, and a leg projection 731 protruding outward may be formed at an upper end of each of the legs 73. The leg protrusion 731 may be inserted inside the wheel installation portion 311c, and the wheel carrier 71 may be installed to be rotatable using the leg protrusion 731 as an axle.

The wheel receiving portion 74 is provided at the front end of each of the pair of legs 73 and configured to connect between the pair of legs 73. And the wheel receiving portion 74 is formed in a shape that is opened downward and provides a space in which the rear wheel 72 is received. And a shaft installation portion 741 to which a rotation shaft 721 of the rear wheel 72 is rotatably connected may be further formed at each of both ends of the wheel receiving portion 74. Therefore, the rear wheel 72 can be rotated while accommodated inside the wheel receiving portion 74.

The elastic portion 75 is provided between the legs 73 and may extend from a first half portion of each of the legs 73 toward its second half portion. And the elastic portion 75 may extend with a predetermined curvature so that its extension end is directed toward the base 31. Also, the elastic portion 75 may be formed in a plate shape, and may extend so as to be elastically deformed when in contact with the base 31.

The extension end of the elastic portion 75 may be in contact with the base 31 while the vacuum cleaner 1 is stopped. At this time, the rear wheel 72 may be in contact with the rear wheel 72. Therefore, the cleaner body 10 can be supported by the pair of moving wheels 60 and the rear wheel 72 disposed behind the moving wheel 60, and can be maintained in a stable state.

And when the cleaner body 10 is rotated by the cleaner body 10 using the moving wheel 60 as an axis, the elastic portion 75 can be elastically deformed and thus can prevent the cleaner body 10 from being excessively rotated or overturned. And when the vacuum cleaner 1 is moved and then stopped and thus an external force that rotates the vacuum cleaner 1 is removed, the cleaner body 10 is moved back to its original position due to a restoring force of the elastic portion 75.

Meanwhile, the connection installation section 31 is 1a, which allows the supply terminal 307 is installed and is exposed downward, formed on a side of the base 31 corresponding to the power supply terminal 307. The terminal installation portion 311a is formed such that its lower surface is opened and the power supply terminal 307 can be provided therein. And the terminal installation portion 311a may be disposed adjacent to one of the moving wheels 60. Accordingly, by receiving and attaching the moving wheel 60 to the charging device, the power supply terminal 307 and the charging device can be aligned with each other.

16 is a rear view showing a state in which the back cover of the cleaner body 10 is opened. And 17 is an exploded perspective view illustrating a coupling structure of a battery and a filter according to the embodiment of the present invention.

As shown in the drawings, the back cover 314 may be provided on a rear surface of the cleaner body 10. The back cover 314 may be rotatably installed on the base 31 and may be configured to open and close the rear opening 317 formed by the base 31 and the top trim 37 by its rotation.

A back cover restricting portion 314a, which is selectively attached to a rear end of the upper ornament 37, may be formed at an upper end of the back cover 314. Therefore, the back cover 314 can be opened and closed by an operation of the back cover restricting portion 314a.

And a cover rotating shaft 314b is formed to protrude from each of both sides of the lower end of the back cover 314. The cover rotation shaft 314b may be coupled to the base 31, and the back cover 314 may open and close the rear opening 317 by rotating around the cover rotation shaft 314b when the back cover 314 is opened and closed.

Meanwhile, a space in which a filter and the battery unit 38 are provided may be provided in the second half portion of the cleaner body 10, i.e., behind the center of the moving wheel 60. And the space in which the filter unit 39 and the battery unit 38 are housed may be defined by the lower frame 33. The lower frame 33 includes the first barrier 331 and the first side wall 332, and the space in which the filter unit 39 and the battery unit 38 are provided can be formed by coupling between the base 31 and the upper frame 34.

The filter unit 39 may include a filter case 391 forming an exterior and a filter element 392 provided inside the filter case 391. The filter element 392 serves to filter ultrafine dust (which is defined as particles smaller than dust and particulate matter) contained in the air that has passed through the dust container 50 and the main motor 35, and in general can be a HEPA filter can be used as the filter element 392. Of course, if necessary, various types of filters that filter the ultrafine dust can be used as the filter element 392.

The filter case 391 may be disposed at an upper portion of the space, and may be formed to be in contact with a lower surface of the upper frame 34 while in an installed state. Therefore, all the air introduced into the room through the plate hole 341a of the upper frame 34 can be purified while passing through the filter unit 39, can cool the battery unit 38, and then can be discharged to the outside.

Some of the air introduced into the room through the plate hole 341a can be moved forward through the first barrier hole 331a of the first barrier 331 and can cool the noise filter 302 and the main PCB 301 during the above-described process.

A filter handle 393 may be formed at a rear end of the filter housing 391. The filter handle 393 can be exposed when the back cover 314 is opened, and thus, by grasping and pulling the filter handle 393, the user can separate the filter unit 39 from the room.

And a filter groove 394 may be formed on each of both side surfaces of the filter case 391. The filter groove 394 may extend from the rear end of the filter housing 391 in a longitudinal direction and may be inserted into a filter guide 333 formed on the second side wall 343.

That is, when the filter case 391 is installed in the room, the filter case 391 is inserted while aligning the filter grooves 394 between the filter guides 333 formed on both side surfaces thereof. Therefore, the filter housing 391 can be completely inserted into the space along the filter guides 333. In this state, the filter case 391 can be maintained in an installed state so that it is in contact with the lower surface of the upper frame 34.

The battery unit 38 can supply electrical power necessary to drive the vacuum cleaner 1. The battery unit 38 can be constructed with a secondary cell that is rechargeable and dischargeable. Of course, a power cable (not shown) for supplying mains power may be separately connected to the battery unit 38.

Meanwhile, although not shown, in the case of a model in which the battery unit 38 is not provided, a cable reel (not shown) on which an electric wire for supplying the electric power is wound may be provided in place of the battery unit 38. The center of gravity can be moved backwards using the cable roller.

The battery unit 38 may include a battery case 381 and a secondary cell 383 accommodated inside the battery case 381. The secondary cell 383 may be arranged to be aligned within the battery case 381.

The battery case 381 may be formed in a size to be accommodated in the space, and a battery ventilation grill 381a may be formed on its upper surface and its lower surface corresponding to the back cover 314. Therefore, the air that has passed through the filter unit 39 and is introduced into the room can cool the secondary cell 383 while passing through an inside of the battery case 381 via the battery ventilation grill 381a.

And a battery handle 382, which is gripped by the user when the battery unit 38 is inserted into or withdrawn from the space, may be formed on a rear surface of the battery case 381. And battery grooves 384 may be formed on both side surfaces of the battery case 381. The battery grooves 384 may be recessed from both of the side surfaces of the battery case 381 and may extend rearwardly from its front ends.

A battery guide 334 formed in a lower portion of the first side wall 332 is inserted into the battery groove 384. When the battery pack 38 is installed, the battery guide 334 can be inserted along the battery groove 384, and thus the battery pack 38 can be installed correctly.

Meanwhile, a battery restriction portion 335 and a battery restriction member 336 may be provided on the battery guides 334 on both sides of the first side wall 332, respectively. The battery restriction portion 335 and the battery restriction member 336 may serve to enable the battery unit 38 to be held in an installed state inside the space, may be arranged at positions facing each other, and may be formed by battery restriction grooves 385 formed on both side surfaces of the battery case 381 are captured and restricted.

Specifically, the battery restriction portion 335 may include a first elastic portion 335a formed by cutting a part of the first side wall 332 and a first restriction projection 335b formed at one end of the first elastic portion 335a. Therefore, while the battery pack 38 is inserted, the first elastic portion 335a can be elastically deformed, and when the battery pack 38 is fully inserted, the first restricting portion 335b is caught and restricted by the battery restricting grooves 385, and thus can restrict one side of the battery pack 38.

Meanwhile, the battery restriction member 336 is installed and fixed to the first side wall 332 facing the battery restriction portion 335. A side hole 334a formed in a shape corresponding to the battery restriction member 336 is opened on the first side wall 332 on which the battery restriction member 336 is installed. And a restriction member fixing portion 334b to which a periphery of the battery restriction member 336 is fitted and fixed may be formed at the side hole 334a. Therefore, the battery restricting member 336 can be installed and fixed by fitting, and a hook can be formed at one end of the restricting member fixing portion 334b, and thus the battery restricting member 336 can be kept in a fixed state.

The battery restriction member 336 may be formed of a different type of material than that of the battery restriction portion 335. For example, the battery restriction portion 335 may be formed integrally with the lower frame 33 and may be injection molded from an ABS material. And the battery restriction member 336 may be injection molded from a POM material. The battery restriction member 336 and the battery restriction section 335 may be separately formed from materials different from each other thus prevent damage to a restriction portion when the battery unit 38 is installed and can be coupled more effectively.

The battery restriction member 336 may include a restriction member flange 336a formed in a square shape corresponding to the side hole 334a. The restriction member flange 336a can be held in an installed and fixed state to the side hole 334a by a periphery of the battery restriction portion 335. And the battery restriction member 336 may include a second elastic portion 336b and a second restriction projection 336c.

The second elastic portion 336b and the second restriction projection 336c may be formed into shapes corresponding to the first elastic portion 335a and the first restriction projection 335b. That is, the second elastic portion 336b may be formed by cutting an inside of the battery restricting member 336, may extend to a predetermined length, and may have elasticity. And the second restriction projection 336c may be formed at one end of the elastic extension portion 336b.

Therefore, while the battery pack 38 is inserted, the second elastic portion 336b can be elastically deformed, and when the battery pack 38 is fully inserted, the second restricting projection 336c can be captured and restricted by the battery restricting grooves 385, and thus can restrict the battery pack 38.

Meanwhile, a battery terminal 331b connected to the battery unit 38 while the battery unit 38 is fully inserted may be provided at a lower end of the first barrier 331. The battery terminal 331b may protrude in an insertion direction of the battery unit 38 and may be configured to be coupled to a front surface of the battery unit 38. And the battery terminal 331b may be electrically connected to the battery unit 38 and may supply the electric power for driving the internal elements of the vacuum cleaner 1.

A holder 371 may be provided over the rear opening 317 shielded by the back cover 314. The holder 371 serves to fix, install and accommodate the extension pipe 22 when the vacuum cleaner 1 is not in use, and may be formed such that an opening 371a formed therein becomes narrower from its opening top toward its bottom.

And the holder 371 may be molded separately from the upper ornament 37 and may be inserted into and installed in the upper ornament 37. And the holder 371 can additionally be fixed to the body part 30 by a holder fixing member 371b, and can be prevented from being damaged when a shock and a load are generated due to the installation of the extension pipe 22. The holder 371 may be formed of a metallic material. The holder 371 may be formed by die casting and may have higher strength.

18 is a cross-sectional view of the cleaner body 10 before the battery is installed. And 19 is a cross-sectional view of the cleaner body 10 in a state where the battery is installed.

As in 18 As shown, before the battery unit 38 is installed, the battery restriction portion 335 and the battery restriction member 336 are disposed at positions facing each other. And the first elastic portion 335a and the second elastic portion 336b are in a state in which the external force is not applied to them, and the first restricting projection 335b and the second restricting projection 336c are in a state protruding into an interior of the lower frame 33 .

In this state, the user can open the back cover 314 to expose the space and then can install the battery pack 38. After the back cover 314 is opened, the battery unit 38 is inserted inside the room. At this point, the battery pack can be slidably inserted while the battery guide 334 and battery groove 384 are aligned. When the battery unit 38 is fully inserted, the front surface of the battery unit 38 can be coupled to the battery terminal 331b and can supply the electric power to the internal elements of the cleaner body 10.

While the battery unit 38 is fully inserted and installed, the front surface of the battery unit 38 is as shown in 19 shown in a contact state with the first barrier 331. While the battery unit 38 is inserted, the first elastic portion 335a and the second elastic portion 336b are elastically deformed outward. And in a state where the battery unit 38 is inserted, the first restriction projection 335b and the second restriction projection 336c may be inserted into the battery restriction grooves 385 provided on both side surfaces of the battery case 381 are formed, and can be kept in a fixed state.

20 is a perspective view of the cover element. And 21 is an exploded perspective view of the cover element. And 22 is a partial cross-sectional view showing a coupling structure of the cover member and the obstacle detection member.

As shown in the drawings, the cover member 40 may form the upper portion of the cleaner body 10 and may be formed to have a structure that shields an upper end of the upper ornament 37 and an upper end of the dust container 50.

The cover member 40 may generally include a cover base 42 and an outer cover 43. The cover base 42 forms a lower surface of the outer cover 43 and substantially shields the dust container 50 and the opened upper surface of the body part 30.

A cover member coupling portion 421 is formed at a rear end of the cover base 42, and the cover member coupling portion 421 may be shaft-coupled to an upper end of the body part 30, particularly the rear end of the upper ornament 37. And a connection hole 422 connected to the connector 401 may be formed at a front end of the cover base 42.

The obstacle detection element 44 may be provided on the cover base 42. The obstacle detection element 44 serves to check an obstacle while the cleaner body 10 is driven, and may be arranged along a front surface of the cover base 42.

A plurality of obstacle detection elements 44 may be provided at a center of the front surface of the cover base 42, i.e. both left and right sides based on the connector 401. That is, two obstacle detection elements 44 may be provided on the left and right sides respectively based on the center of the cover base 42, and each of the obstacle detection elements 44 may be formed to have a detection range of about 25° using a laser sensor 441. And the plurality of obstacle detection elements 44 may be arranged such that adjacent obstacle detection elements 44 are directed in directions different from each other.

The obstacle detection elements 44 may include front sensors 44b and 44c and side sensors 44a and 44d. The front sensors 44b and 44c serve to detect the obstacle that is in front of the cleaner body 10. When the obstacle appears in front of the cleaner body 10 while the cleaner body 10 is being driven, the front sensors 44b and 44c detect the obstacle. And the side sensors 44a and 44d serve to detect the obstacle located on a side side of the cleaner body 10. When the obstacle appears on the side side adjacent to the cleaner body 10 while the cleaner body 10 is being driven, the side sensors 44a and 44d detect the obstacle. In particular, the side sensors 44a and 44d, through a combination of the front sensors 44b and 44c, enable the cleaner body 10 to be driven without colliding with a corner of a wall surface.

Specifically, the front sensors 44b and 44c may be disposed on both of the left and right sides of the connector 401, respectively, and may be disposed to emit light in a diagonal direction between the front and side sides. That is, as in 22 As shown, centers of the front sensors 44b and 44c may be disposed at positions rotated clockwise and counterclockwise by 45° with respect to a center of the connector 401. Therefore, the centers of the front sensors 44b and 44c can form an angle of 90° with respect to each other.

And since the detection range of each of the obstacle detection elements 44 is about 25°, an undetected area S is generated between the front sensors 44b and 44c. The unrecognized area S can have an angle of 65°. The non-detected area S is in an area where the suction hose 24 can be disposed while the cleaner body 10 is driven, and which prevents the suction hose 24 from being considered as the obstacle by the front sensors 44b and 44c. That is, even if the user moves the suction hose 24 while performing a cleaning operation, the front sensors 44b and 44c can be prevented from erroneously recognizing the suction hose 24 as the obstacle, and thus the cleaner body 10 can be prevented from being abnormal is driven.

The side sensors 44a and 44d are arranged further on a back side than the front sensors 44b and 44c and are arranged to emit the light toward the side side of the cleaner body 10. That is, the side sensors 44a and 44d can be arranged on both sides based on the connector 401 to form an angle of approximately 90°. Therefore, the side sensors 44a and 44d can detect the obstacle appearing on the side side of the cleaner body 10.

Meanwhile, each of the side sensors 44a and 44d may be configured to have a shorter detection distance than that of each of the front sensors 44b and 44c. For example, each of the front sensors 44b and 44c may be configured to have a detection distance L1 of about 600 mm toward the front, and each of the side sensors 44a and 44d may be configured to have a detection distance L2 of about 350 mm mm towards the lateral side.

Since the obstacle located at the front of the cleaner body 10 has a high probability of obstructing the cleaner body 10 while the cleaner body 10 is being driven, it is necessary to detect the obstacle located at a large distance. In the case of the obstacle located on the side side, there is a small possibility of it obstructing the cleaner body 10 while the cleaner body 10 is being driven and when a distant object located on the side side acts as the obstacle is detected, it may be impossible for the cleaner body 10 to be driven normally.

In particular, when the detection distance L2 of each of the side sensors 44a and 44d is set shorter than the L1 of each of the front sensors 44b and 44c, the cleaner body 10 can easily avoid a wall surface or a corner when passing the wall surface or the corner.

Meanwhile, the obstacle detection elements 44 may include the laser sensor 441 and a sensor substrate 442 on which the laser sensor 441 is installed. Elements for driving or controlling the laser sensor 441 may further be installed on the sensor substrate 442. Of course, instead of the laser sensor 441, various devices such as an ultrasonic sensor, a proximity sensor and a vision camera that detect the obstacle located on the front may be used as the obstacle detection element 44.

And a locking arrangement 80 that allows the cover member 40 to be selectively restricted may be further provided between the cover base 42 and the outer cover 43. The locking arrangement 80 may include a pressure element 81 and a main connection 83 and a sub-connection 84 which are locked together with the pressure element 81.

The outer cover 43 forms an exterior of the cover member 40 and forms an exterior of the upper portion of the cleaner body 10 while the cover member 40 is closed. The connector 401 connected to the fitting portion 241 of the suction hose 24 is formed at the front end of the outer cover 43. The connector 401 is connected to the connection hole 422 and allows the dust and air sucked by the suction unit 20 to be introduced toward the dust container 50.

A detection hole 431 may be formed on the base of the connector 401 on a front surface of the outer cover 43. The detection hole 431 may be opened at a position corresponding to the laser sensor 441, and may be formed so that the light for detecting the obstacle is transmitted and received therethrough.

Meanwhile, the detection hole 431 may be opened at a position corresponding to each of the front sensors 44b and 44c and the side sensors 44a and 44d, and may be formed such that both of its inner side surfaces are inclined. Consequently, the light can be emitted in a fixed angular range.

And if necessary, a hole cover 432 formed of a material through which light of the laser sensor 441 is transmitted and shielding the detection hole 431 may be further provided at the detection hole 431. A plurality of detection holes 431 may be formed at the same height and may be arranged at mutually symmetrical positions based on the connector 401. As described above, the detection holes 431 and the obstacle detection elements 44 may be disposed on a front surface of the cover member 40 that is not shielded from the body part 30 but is exposed forward to detect the obstacle while the cleaner body 10 is driven.

The gripping portion 41 may be formed on an upper surface of the outer cover 43. The gripping portion 41 may extend from a side of the connector 401 to a rear end of the outer cover 43. And the pressing member 81, which is pressed by the user to selectively restrict the cover member 40, may be provided at the gripping portion 41. By operating the pressure member 81, a cover restriction projection 843 can be selected protrude towards both sides of the cover element 40 and can selectively restrict the cover element 40 to the body part 30.

23 is an exploded perspective view illustrating a coupling structure of a lock assembly according to the embodiment of the present invention.

As shown in the drawing, the lock structure 80 may include the pressure member 81 pressed by the user, a transmission member 82 that transmits the operation of the pressure member 81, the main link 83 rotated by the transmission member 82, and the sub-link 84. which is moved horizontally by the rotation of the main link 83.

The pressing member 81 may be accommodated inside the gripping portion 41 and may be arranged to be vertically movable. The gripping portion 41 may be formed by coupling a gripping portion cover 411 to a gripping portion body 412, and the pressing member 81 may be installed on the gripping portion body 412. A cover opening 411a may be formed on the gripping portion cover 411, and the pressing member 81 may be exposed through the cover opening 411a.

A transmission member installation portion 811 extending downward is formed on a lower surface of the pressure member 81. The transmission member 82 is installed on the transmission member installation portion 811. The transmission element 82 and the pressure element 81 can be shaft-coupled to each other. When the pressing member 81 is moved vertically, the transmitting member 82 can be moved vertically together while being rotated to a predetermined angle.

And the inclined transmission member portion 821 may be formed on a lower surface of the transmission member 82. The inclined transmission member portion 821 serves to be in contact with the main link 83, which will be described later, and to move the main link 83, and is formed such that its width increases upward from its lower end to form an inclined surface .

The main link 83 and the sub-link 84 may be coupled and locked together, and a pair of the main links 83 and a pair of the sub-links 84 may be provided on both of the left and right sides based on a center of the cover base 42, respectively. That is, the main connections 83 and the sub-connections 84 may include a first main connection 83a and a first sub-connection 84a based on 23 are provided on the left side, and a second main connection 83b and a second sub connection 84b provided on the right side.

The main connection 83 may be rotatably coupled to the cover base 42 through a mounting boss 85. The main connection 83 includes a passage portion 831 through which the fastening boss 85 passes, a first extension portion 832 extending from the passage portion 831 toward its center where the transmission element 82 is disposed, and a second extension portion 833 extending from the passage portion 831 Passage section 831 extends in a direction vertical to the first extension section 832.

Meanwhile, a connection portion 834 formed at the first extension portion 832 of each of the first main connection 83a and the second main connection 83b may be formed overlapping with each other. An extension portion hole 834b and an extension portion projection 834a rotatably coupled to each other are formed on the first extension portions 832, and thus the first main connection 83a and the second main connection 83b can be locked with each other.

Likewise, an inclined extension portion surface 834c corresponding to the inclined transmission member portion 821 is formed at an end of the first extension portion 832, i.e., its side in contact with the transmission member 82. The inclined extension portion surface 834c is held in a contact state with the inclined transmission member portion 821, and the inclined transmission member portion 821 is vertically moved according to the vertical movement of the transmission member 82 along the inclined extension portion surface 834c, and thus the first extension portion 832 can be moved back and forth. The first main link 83a and the second main link 83b can be rotated according to the forward and backward movement of the first extension portion 832.

The auxiliary connection 84 can be rotatably coupled to one end of the second extension section 833. That is, the first sub-connection 84a and the second sub-connection 84b are each connected to ends of the pair of the second Extension sections 833 coupled. And connection holes 833a may be formed at the ends of the second extension portions 833, and connection projections 841a coupled into the connection holes 833a may be formed on the first sub-connection 84a and the second sub-connection 84b. Therefore, when the main link 83 is rotated, the sub-link 84 can be locked therewith.

A connection guide 823 may be formed on the cover base 42. The connection guide 423 is formed at a position corresponding to each of the first sub-connection 84a and the second sub-connection 84b, and a space in which the first sub-connection 84a and the second sub-connection 84b are accommodated is formed therein. The connection guide 423 may be formed in the form of a pair of ribs and may guide the sub-link 84 to be movable while the sub-link 84 is disposed therebetween.

Each of the first sub-connection 84a and the second sub-connection 84b may include a third extension portion 841 received in the connection guide 423 and a fourth extension portion 842 vertically curved from the third extension portion 841. And the cover restricting projection 843 that projects laterally may be formed on the third extension portion 841.

An inclined surface 843a may be formed on a side surface of the cover restriction projection 843. The inclined surface 843a may be formed such that its width is increased from its lower end toward its upper end. Therefore, while the cover member 40 is closed, the inclined surface 843a of the cover restriction projection 843 can be inserted inwardly while in contact with a side wall of the upper trim 37, and then can protrude outward to be restricted when it has a projection restriction hole 376 (in 28 ) of the upper decoration 37 reached. For this purpose, an upper end of the cover restricting projection 843 may be formed in a flat shape.

And a protrusion entrance 424 through which the cover restricting protrusion 843 is inserted and retracted may be formed on a side surface of the cover base 42 corresponding to a position of the connection guide 423. When the second sublink 84b is moved horizontally, the cover restriction projection 843 can be inserted and retracted through the projection entrance 424. The cover restriction portion 843 is passed through the protrusion restriction hole 376 (in 28 ) of the body portion 30 is captured and restrained while protruding from the projection entrance 424 and allows the cover member 40 to be maintained in a closed state.

However, although not shown, an elastic member such as a spring may be provided on the pressure member 81 and/or the main link 83 and/or the sub-link 84. Due to the elastic member, the cover restricting projection 843 can be kept in a protruding state while no external force is provided by user operation.

24 is a perspective view illustrating a state before the lock assembly is operated. And 25 is a cross-sectional view showing the state before the lock assembly is operated.

As shown in the drawings, the transmission member 82 can be maintained in the contact state with the main link 83 while the pressure member 81 is not operated by the user. At this point, the transmission member 82 is disposed on the uppermost side, and the inclined transmission member portion 821 is in a contact state with the inclined extension portion surface 834c.

Likewise, an inclined guide surface 822 may also be formed at a lower end of the transmission element 82. The inclined guide surface 822 may be in contact with a transmission member guide 412a formed on the cover base 42. That is, when the transfer member 82 is moved downward, the transfer member 82 allows the inclined guide surface 822 to be moved along the transfer member guide 412a. At this point, the transmission member guide 412a extends to cross the main link 83 vertically, and thus the transmission member 82 can be moved in a direction crossing the main link 83 when moved downward, and can operate the main link 83.

At this point, the first main link 83a and the second main link 83b are kept on the same extension line, and the main link 83 is kept in a state in which no external force is applied. The cover restriction projection 843 is passed through the projection restriction hole 376 (in 28 ) of the body part 30 in a captured and restricted state while protruding from the projection entrance 424, thus allowing the cover member 40 to be maintained in the closed state.

In this state, the user presses the pressing member 81 to open the cover member 40. Due to the operation of the pressing member 81, the main link 83 and the sub-link 84 are locked with each other, and the cover member 40 is in an openable state.

26 is a perspective view showing an operating state of the locking arrangement. And 27 is a cross-sectional view showing the operating state of the locking arrangement.

As shown in the drawings, when the user presses the pressing member 81, the transmitting member 82 is moved downward. At this point, the transmission member 82 can be rotated by a rotating shaft 81 1a formed on the transmission member installation portion 811, and can vertically press the main link 83. At this point, in order to prevent the transmission member 82 from being excessively rotated or separated, a pair of separation protection projections 824 may protrude from an upper end of the transmission member 82 so that they are spaced from each other at a predetermined distance, and a separation protection rib 812 of the pressure member 81 can be arranged between the separation protection projections 824.

When the transmission member 82 is moved downward while the inclined transmission member portion 821 is in contact with the inclined extension portion surface 834c, the inclined extension portion surface 834c performs relative movement along the inclined transmission member portion 821. That is, the first extension portion 832 is pushed forward. At this point, since the first main link 83a and the second main link 83b are connected to each other, the first extension portion 832 is also moved forward together.

When the first extension portion 832 is moved forward, the main link 83 is rotated using the passage portion 831 as an axis, and the second extension portions 833 are moved in a direction to come closer to each other. Therefore, the first sub-link 84a and the second sub-link 84b connected to the second extension portion 833 are moved horizontally inward. Due to the horizontal movement of the sub-link 84, the cover restriction portion 843 formed on the sub-link 84 is also moved toward an interior of the projection entrance 424.

In this state, since the cover restriction projection 843 is disposed inside the cover member 40, the restriction can be achieved by the projection restriction hole 376 (in 28 ) of the body part 30 can be solved. Therefore, the user can rotate the cover member 40 while grasping the gripping portion 41 of the cover member 40, and can open an interior of the body part 30, or can separate the dust container 50 from the body part 30.

However, as in 26 shown, a display 45 for displaying an operating state of the vacuum cleaner 1 may be provided on the cover element 40. The display 45 may be configured to display information on an upper surface of the cover member 40, and may be disposed on a side side of the gripping portion 41 so that the user can easily check a condition of the vacuum cleaner 1 from an upper surface while using it Vacuum cleaner 1 used.

The display 45 may be formed of various types such as a liquid crystal display, a combination of multiple LEDs, and a seven-segment, and may be formed to allow the information to be visible. The display 45 may be defined as a single structure for outputting an image, and may also be defined to include a display PCB 451 on which the display 45 is mounted.

The display 45 may be installed on the cover base 42 and may be formed to be shielded from the outer cover 43. At this point, all or part of the outer cover 43 may be formed to transmit light. Therefore, when the display 45 shielded by the outer cover 43 is operated, the information can be displayed on an outside through the outer cover 43.

For this purpose, the entire outer cover 43 can be made of a material that transmits the light. Otherwise, only a part thereof corresponding to the display 45 may be formed to transmit light. Of course, an opening may be formed on the outer cover 43, and the display 45 may be installed at the opening to be exposed directly to the outside or to be shielded by a separate transparent cover.

The display 45 may be installed and attached to an upper surface of the cover base 42. The display 45 may be connected to the main PCB 301 through a display cable 452. Therefore, the display 45 can be operated by the electric power and information transmitted from the main PCB 301.

The display 45 can display the operating status of the vacuum cleaner 1 and can be designed, for example, to display a remaining battery value of the battery unit 38 or an operating time with the current remaining battery value. Likewise, the display 45 can display an abnormal operating state of the vacuum cleaner 1 or information about a replacement of the dust container 50 or the like.

28 is a top view of the cover member in which a display according to the embodiment is in an OFF state. And 29 is a top view of the cover member in which a display according to the embodiment is in an ON state.

Referring to the drawings, while the vacuum cleaner 1 is not operated, the display 45 is in an OFF state. In this state the display will appear as in 28 shown, is covered by the outer cover 43 and is therefore invisible from the outside, and only an exterior of the outer cover 43 can be exposed.

When an operation of the vacuum cleaner 1 starts by a user operation, the display 45 is turned on, and an image output on the display 45 can be visible through the outer cover 43. That is, when the display 45 becomes bright due to output of the image on the display 45, light from the display 45 can pass through the outer cover 43 and thus the image on the display 45 can be visible to the outside.

The display 45 can display a state of the battery unit 38 of the vacuum cleaner 1 in the form of an image. The user can check the condition of the battery unit 38 through the image displayed on the display 45, and can decide to charge the battery unit 38 or perform a cleaning operation.

Of course, the display 45 may display a variety of information other than the state of charge of the battery unit 38.

30 is a perspective view showing a state in which the cover member is opened. And 31 is an exploded perspective view illustrating a coupling structure of a connection assembly according to the embodiment of the present invention.

As shown in the drawings, the cover member coupling portion 421 is formed at the rear end of the cover member 40, and the cover member coupling portion 421 can be coupled into a cover member coupling hole 372 formed in the upper ornament 37 of the body part 30. When the cover member coupling portion 421 is coupled into the cover member coupling hole 372, the cover member 40 can be rotatably installed. The cover member 40 can be rotated using the cover member coupling portion 421 as an axis, and can open and close the interior of the body part 30.

The cover member 40 can also be opened and closed when the dust container 50 is separated. If the cover member 40 is kept in an opened state during such operation, the dust container 50 can be separated more easily.

In particular, since a structure to which the fitting portion 241 of the suction hose 24 is installed is provided at a front end of the cover member 40, the cover member 40 is naturally structurally closed due to a weight of the suction hose 24.

In this state, the connecting assembly 90 connecting the rear end of the cover member 40 to an interior of the upper trim 37 may be provided to maintain the opened state of the cover member 40.

The connection assembly 90 may include a rotary joint 91 installed on the cover member coupling portion 421, a slider 92 coupled to the rotary joint 91 so as to be slidably moved when the rotary joint 91 is rotated, and a spring 93 supporting the slider 92 elastic holds, include.

The rotary joint 91 may include a rotary portion 911 rotatably installed on the cover member coupling portion 421, and holding portions 912 extending from both side ends of the rotary portion 911 to be spaced apart from each other.

The rotating portion 911 may be inserted between a pair of the cover member coupling portions 421, and a rotating shaft 911a, which laterally protrudes from each of both side ends of the rotating portion 911, may be inserted into a rotating shaft hole 421a provided on the cover member coupling portion Section 421 is designed to be used. Therefore, the rotary joint 91 can be rotatable about the rotary shaft 911a and can be rotated when the cover member 40 is opened and closed.

The holding portions 912 may extend while being spaced apart from each other, and a space portion 913 in which one end of the slider 92 is received may be formed between the pair of holding portions 912. A slider fixing portion 912a and a holding projection 912b may be formed at ends of the pair of holding portions 912, respectively.

The slider attachment portion 912a protrudes toward the opposite end of the holding portion 912 and is disposed inside the space portion 913. The slider attachment portion 912a may be inserted into a slider attachment groove 921 of the slider 92. And the slider fixing portion 912a may be a rotation shaft of the slider 92 or a rotation shaft of the rotary joint 91.

The holding projection 912b is formed to laterally protrude from the end of the holding portion 912 along its outer surface. The holding projection 912b may protrude outwardly and may be selectively captured and restricted by an engaging projection 375a inside a connector assembly receiving portion 373 described later when the cover member 40 is opened and closed.

Meanwhile, a holding slot 912c may be formed at each of the ends of the holding portions 912. The holding slot 912c allows the ends of the holding portions 912 to be easily elastically deformed when the holding projection 912b and the engaging projection 375a are engaged with each other.

A rear end of the slider 92 is disposed inside the space portion 913, and its front end can be received in the connection assembly receiving portion 373 formed on the body part 30.

The slider fixing groove 921 recessed inwardly may be formed on each of the left and right side surfaces of the slider 92. The slider fixing groove 921 is formed to open rearwardly and is configured to receive the slider fixing portion 912a formed in a wave shape. And the slider 92 can be locked with the rotary connection 91.

And a slider guide 922 may be formed on a front side of the slider fixing groove 921. The slider guide 922 may extend from one end of the slider fixing groove 921 to an end of the slider 92. The slider guide 922 has a pair of ribs provided on both its left and right sides, respectively, accommodates a guide rib 374a described later, and allows the slider 92 to be easily moved.

And a spring hole 923 recessed inwardly is formed on a rear surface of the slider 92. The spring 93 may be inserted into and installed in the spring hole 923, may be compressed or elastically deformed according to the movement of the slider 92, and may impart an elastic force to the slider 92.

Meanwhile, the connection assembly receiving portion 373 may be formed on the upper ornament 37. The connection assembly receiving portion 373 may be provided on the upper surface of the body part 30 and may be formed to have a size that allows the slider 92 and the rotary joint 91 to be inserted and retracted.

Specifically, a slider receiving portion 374 in which the slider 92 is received may be formed at a center inside the connector assembly receiving portion 373. And the guide rib 374a is formed to protrude from each of both wall surfaces of the slider receiving portion 374. The guide rib 374a may protrude to be inserted into the slider guide 922 and may be formed to extend in an insertion direction of the slider 92. Therefore, the guide rib 374a and the slider guide 922 prevent the slider 92 from being separated and allow the slider 92 to be slidably moved along a specified route when the slider 92 is slidably moved forward and backward.

A connection receiving portion 375 into which the rotary joint 91 is selectively inserted may be further formed on the connection assembly receiving portion 373. The connection receiving portion 375 may be disposed on a rear side of the slider receiving portion 374, may provide a space in which the rotary joint 91 is received, and may be opened rearwardly.

The engaging projection 375a, which protrudes inward, may be formed to protrude from an inner wall surface of the slider receiving portion 375. The engagement projection 375a can hold the holding projection 912b formed on the holding portion 912 while the cover member 40 is opened and the rotary joint 91 is retracted, and can allow the rotary joint 91 to be maintained in a retractable state.

At this point, the engaging projection 375a may protrude so as to be inclined at a predetermined angle, and thus may enable the rotary joint 91 to be held in an inclined state when the holding projection 912b is held. That is, when the engaging projection 375a holds the holding projection 912b, the cover member 40 can be allowed to be held in the inclined state and thus maintained in the opened state.

And an opened and closed state of the cover member 40 can be determined by holding the holding projection 912b by the engaging projection 375a or moving over the engaging projection 375a in accordance with the rotation operation of the cover member 40 by the user.

32 is a cross-sectional view showing a state of the connection assembly while the cover member is closed.

Referring to the drawing, a state of the connection assembly 90 while the cover member 40 is in a closed state will be described. While the cover member 40 is in the closed state, the cover member 40 shields the opened upper surface of the body part 30. A lower end of the cover member 40 is in contact with a lower end of the upper ornament 37, and the connection assembly 90 of the cover member 40 is in a state restricted by the upper ornament 37.

And the slider 92 and the rotary joint 91 are in an inserted state inside the joint assembly receiving portion 373 of the upper ornament 37, and the rotary joint 91 is held in a horizontal state with the slider 92 or on the same extension line as that of the slider 92.

Since the slider 92 is fully inserted into the slider receiving portion 374 at this point, the spring 93 is in a maximally compressed state. Therefore, when the user releases the restriction of the lock assembly 80 to open the cover member 40, the slider 92 can be pushed by the elastic force of the spring 93, and thus a force in a rotation direction of the cover member 40 can be naturally applied.

In this state, the user presses the pressing member 81 and operates the lock assembly 80 to open the cover member 40, and thus the restriction of the cover member 40 and the body part 30 is released and the cover member 40 is in an openable state. And the user can grasp the gripping portion 41, can rotate the cover member 40, and then open the cover member 40.

33 is a cross-sectional view showing the state of the connection assembly while the cover member is opened. And 34 is an enlarged view of an A section in 30 .

Referring to the drawings, the state of the connection assembly 90 while the cover member 40 is in the opened state will be described. When the cover member 40 is opened by the user, the cover member 40 can be rotated clockwise using the cover member coupling portion 421 as an axis, and thus can be opened.

At this point, the rotary joint 91 rotatably coupled to the cover member coupling portion 421 is also rotated together, and the slider 92 connected to the rotary joint 91 becomes slidably backward (to a right side in 33 ) moves by guiding the slider guide 922 and the guide rib 374a. When the slider 92 is moved, the spring 93, which elastically holds the slider 92, provides the elastic force, and thus the slider 92 can be moved more easily.

And the rotary link 91 is moved horizontally along the slider 92 to pull and retract the slider 92 and at the same time rotated counterclockwise. At this point, the holding projection 912b of the rotary joint 91 is in contact with the engaging projection 375a on the joint assembly receiving portion 373.

When the cover member 40 is fully opened by the user, the rotary joint 91 may be in a state in 33 and 34 is shown. At this point, by the rotation operation of the cover member 40 by the user, the holding projection 912b can pass through the engaging projection 375a, and the holding portion 912 is elastically deformed so that the holding projection 912b is moved over the engaging projection 375a.

In this state, the opening of the cover element 40 can be stopped. Even if the user releases the gripping portion 41, the holding projection 912b is in contact with the engaging projection 375a, and thus the rotary joint 91 can be held at the target angle. Therefore, the cover member 40 can maintain the opened state at the target angle. While the cover member 40 is opened, the user can separate or install the dust container 50 or can perform any necessary operations in the body part 30.

However, if in the in 33 and 34 In the state shown, if the intention is to close the cover member 40 again, the user can grasp the gripping portion 41 and can press the cover member 40, and thus the cover member 40 can be closed while rotating it in the counterclockwise direction.

At this point, at a moment when the counterclockwise rotation of the cover member 40 begins, the holding projection 912b can be moved over the engaging projection 375a by a force applied by the user, and the holding portion 912 can be elastically deformed so that the holding projection 912b is easily moved .

The cover element 40 is in one 32 shown state when it is fully rotated and closed. When the cover member 40 is closed, the cover restriction projection 843 of the lock assembly 80 is inserted and restricted inside the projection restriction hole 376, and the cover member 40 can be maintained in the closed state.

Meanwhile, the display cable 452 may be guided into the body part 30 through a cover member coupling portion 46 extending rearwardly from a rear end of the cover member 40. The display cable 452 is guided along an interior of the cover member coupling portion 46 so that it is not exposed to the outside. And since the display cable 452 is led into the body part 30 through a rear end of the cover member coupling portion 46, which is a rotation center of the cover member 40, it is possible to prevent the display cable 452 from being exposed and also to prevent the display cable 452 is damaged even though an opening and closing operation of the cover element 40 is carried out continuously.

35 Fig. 10 is a partial perspective view showing a structure of the cover member coupling portion and an arrangement of the display cable according to the embodiment of the present invention.

A structure of the cover member coupling portion 46 will be described in detail with reference to the drawing. A pair of the cover member coupling portions 46 may extend rearwardly from both the left and right sides, may be inserted into the cleaner body 10, and may be rotatably coupled.

The cover member coupling portion 46 may include a curved portion 461 extending downward from the rear end of the cover base 42 in a predetermined length and an extending portion 462 extending rearwardly from one end of the curved portion 461.

A curved portion hole 463 into which the rotating shaft 911a of the rotating portion 911 of the rotating joint 91 is inserted may be formed on an inner surface of each of the curved portions 461 provided on both left and right sides. Therefore, one end of the rotary joint 91 may be disposed in a space between a pair of curved portions 461 and may be rotatably coupled to the inner surface of the curved portion 461.

And a cover rotation shaft 464 may be formed on both side ends of the extension portion 462. The cover rotation shaft 464 may protrude outward from an outer surface of the extension portion 462 and may be shaft-coupled to the cover member coupling hole 372 of the upper ornament 37. Therefore, the cover member 40 can be rotated about one end of the cover member coupling portion 46, i.e., the cover rotation shaft 464, and can be opened and closed by rotation.

Meanwhile, the cover member coupling portion 46 has a guide space 465 recessed therein. The guide space 465 may be formed from a front end of the cover member coupling portion 46 to its rear end. And a cable hole 466 may be formed at a rear end of the guide space 465, that is, the rear end of the cover member coupling portion 46.

Therefore, while the cover member 40 is rotatably coupled to the upper ornament 37, the cover member coupling portion 46 is inserted into an ornament hole 377 of the upper ornament 37. And in this state, the cover member coupling portion 46 can allow an interior of the cover member 40 and an interior of the body part 30 to communicate with each other.

The display cable 452 may be arranged at the guide space 465 of the cover element coupling section 46. The display cable 452 may be routed along the cover member coupling portion 46, may pass through the cable hole 466, and may then be inserted into the body portion 30. And the display cable 452 inserted into the body part 30 can be connected to the main PCB 301. Of course, the display cable 452 may be connected to another PCB or power supply element in the body part 30 instead of the main PCB 301.

Meanwhile, a plurality of reinforcing sections 467 may also be formed in the guide space 465. Each of the plurality of reinforcing portions 467 may be formed in a rib shape, and the plurality of reinforcing portions 467 may be formed in an extension direction of the cover member coupling portion 46 and a direction intersecting therewith.

And a stopper 47 may be provided between a space between the cover member coupling portions 46 provided on both of the left and right sides. The stopper 47 may be in contact with an outer surface of the upper ornament 37 while the cover member 40 is fully opened, when a rotation operation is performed to open the cover member 40, the cover member 40 can be restricted from being excessively rotated, and can thus preventing the rotary connection 91 from being broken or separated.

36 is a view showing a cable arrangement state in a cover base of the cover member.

As shown in the drawing, the locking assembly 80 may be disposed on the cover base of the cover member 40. The locking arrangement 80 may include the pressure element 81, the transmission element 82, the main connection 83 and the sub-connection 84. At this point, the pressing member 81 may be installed and fixed to the gripping portion 41, and the remaining structures of the lock assembly 80 other than the gripping portion 41 may be arranged to interact with each other on the cover base 42.

And the plurality of obstacle detection elements 44 may be disposed on the front surface of the cover member 40. The obstacle detection elements 44 serve to check an obstacle while the cleaner body 10 is driven, and may be arranged along the front surface of the cover base 42.

The plurality of obstacle detection elements 44 may be provided on both of the left and right sides based on a center of the front surface of the cover base 42, i.e., the connector 401. That is, two obstacle detection elements 44 may be provided on the left and right sides, respectively, based on the center of the cover base 42. The front surface of the cover member 40 may be rounded, and the plurality of obstacle detection elements 44 may be formed to emit light beams or ultrasonic waves for detecting the obstacle in a direction vertical to a tangent line of the front surface of the cover member 40. The obstacle detection element 44 may include a vision camera or a laser sensor, an optical sensor or an ultrasonic sensor, which can detect the obstacle arranged in a traveling direction of the vacuum cleaner 1 or a position adjacent thereto.

The obstacle detection elements 44 may include a plurality of sensor substrates 442 for operation of the sensor or a detection device, and a detection element cable 443 may be connected to each of the plurality of sensor substrates 442. Supplying electric power and transmitting a detected signal for operation of the obstacle detection element 44 may be performed through the detection element cable 443.

A plurality of sensing element cables 443 may be provided to connect the plurality of sensor substrates 442, and may be routed along an inner periphery of the cover base 42 to a back side on which the cover element coupling portion 46 is disposed. At this point, the sensing element cables 443 may be fixed into a bundle by a cable guide member 443a such as a contraction tube, an adhesive tape or a cable tie, and may pass through the cover member coupling portion 46 in this state. That is, the cable guide member 443a may be disposed at a portion passing through at least the cover member coupling portion 46.

At this point, the sensing element cables 443 can be routed through one (the left in 36 ) of the pair of cover member coupling portions 46 disposed at the rear end of the cover base 42 are guided into the body portion 30. Therefore, the detection element cables 443 can be prevented from being damaged even though the cover member 40 is continuously operated to be opened, and they can be easily arranged in the body part 30 by passing through the cover element coupling section 46 can be guided.

Meanwhile, the display 45 and the display PCB 451 may be disposed on the upper surface of the cover base 42. Of course, the display 45 and the display PCB 451 can be installed and fixed on a rear surface of the outer cover 43 of the cover member 40.

The display PCB 451 may be installed and fixed on the upper surface of the cover base 42, and the display 45 may be installed on the display PCB 451. The display 45 may include a light guide 45a that is in contact with the back surface of the outer cover 43, and a plurality of LED holes 45b may be installed on the light guide 45a. And LEDs (not shown) may be accommodated in the plurality of LED holes 45b and may be turned on and off independently. Therefore, the remaining battery value of the battery unit 38 can be displayed by light guided by the LED holes 45b and transmitted to the outer cover 43.

Meanwhile, the display cable 452 may be installed on the display PCB 451. The display cable 452 may be constructed with multiple wires and may be fixed into a bundle by a cable guide member 452a which is the same as the cable guide member 443a. The cable guide member 452a may be disposed at a portion that passes at least through the cover member coupling portion 46. And the display cable 452 can be guided into the body part 30 through the cover member coupling portion 46. At this point the display cable 452 can be passed through the other one (the one on the right in 36 ) of the pair of cover element coupling portions 46 instead of the one through which the sensing element cable 443 is passed. That is, the detection element cable 443 and the display cable 452 can be separately routed through the pair of cover element coupling portions 46 provided at the rear end of the cover base 42.

37 is a view showing a coupling structure of the wire with the cleaner body.

As shown in the drawing, the detection element cable 443 and the display cable 452 can be guided into the body part 30 through the pair of cover element coupling portions 46 without exposing the cables to the outside even when the cover element 40 is operated to be opened and closed by the rotation become.

The detection element cable 443 inserted into the body part 30 can be guided to a side of the body part 30 where the moving wheel 60 is installed. And the detection element cable 443 may be connected to the detection part 306 installed on the body part 30. Therefore, an obstacle detection signal detected by the obstacle detection element 44 can be transmitted to and processed in the detection part 306, and the travel of the cleaner body 10 can also be controlled by controlling the driving of the moving wheel 60.

At this point, the connectors 443b that are connectable to each other can be provided at one end of the detection element cable 443 and on one side of the detection part 306, and thus the detection element cable 443 and the detection part 306 can be connected by a simple operation connecting the connectors 443b. get connected.

And the display cable 452 inserted into the body part 30 may be connected to the battery unit 38 installed on the lower frame 33 while being inserted into the body part 30, or may be connected to another PCB or device , which can provide the information about the remaining battery value of the battery unit 38.

That is, the information about the remaining battery value of the battery unit 38 and the electric power transmitted to the display 45 in a connected state of the display cable 452, and thus operation information of the battery unit 38 can be transmitted to the user.

Of course, a connector 452b may also be provided at one end of the display cable 452 to be easily coupled to a target object.

38 is a perspective view of the dust container. And 39 is an exploded perspective view of the dust container.

As shown in the drawings, the dust container 50 serves to separate and store the dust in the air introduced by the suction unit 20, and the sucked air can in turn pass through a first cyclone 54 and a second cyclone 55, which Separating the dust from the air in a cyclonic process, filtered, can then be discharged through the discharge opening 512 and can be introduced into the interior of the body part 30.

The dust container 50 may include a transparent case 53 formed generally in a cylindrical shape, an upper cover 51 that opens and closes an opened upper end of the transparent case 53, and a lower cover 52 that opens an opened lower end of the transparent Housing 53 opens and closes. And the first cyclone 54, the second cyclone 55, an inner case 544, the dust compacting unit 56, a guide unit 543 and so on may be accommodated in the transparent case 53.

Specifically, the top cover 51 forms an exterior of an upper surface of the dust container 50 and is formed to be shielded from the cover member 40 while installed on the body part 30. And the suction port 511 is formed on a front side of the dust container 50. The suction port 511 is formed to be in communication with the connector 401 while the cover member 40 is closed, so that the air containing the dust sucked by the suction unit 20 is introduced into the inside of the dust container 50.

And although not shown in detail, a passageway 518 is provided inside the top cover 51 so that the air introduced through the suction port 511 is guided along its outer periphery and flows downward along an inner surface of the transparent case 53. At this point, the flowing air can be discharged in a direction along the inner surface of the transparent case 53 through the top cover 51 and can be rotated along a circumference of the transparent case 53 while rotating spirally.

The discharge port 512 is formed on a back side of the top cover 51 facing the suction port 511. The discharge port 512 is an outlet through which air from which the dust is filtered while passing through the first cyclone 54 and the second cyclone 55 inside the dust container 50 is discharged to the outside of the dust container 50. The air in the dust container 50 can be directed to the discharge port 512 through the passageway 518 provided inside the top cover 52. And the discharge port 512 may be in contact with the filter hole 361a of the pre-filter assembly 36 and may be inserted into the body part 30 through the filter hole 361a.

Meanwhile, a dust container handle 513 retractable upward may be provided on an upper surface of the top cover 52. The dust container handle 513 may include a handle portion 513a that extends transversely to be gripped by the user and a side extension portion 513b that vertically extends from each of both ends of the handle portion 513a. The side extension portion 513b may be inserted inside the top cover 52. At this point, the handle portion 513a may be in close contact with the upper surface of the top cover 52. While the dust container 50 is installed, the dust container handle 513 is maintained in an inserted state due to its own weight and does not interfere with the cover member 40 when the cover member 40 is opened and closed.

And a cover insertion portion 514 extending downward along a circumference of the top cover 51 is formed at a lower end of the top cover 52, and an upper seal 515 is provided on the top cover insertion portion 514 to seal the transparent case 53 while the top cover 51 is installed on the transparent case 53. And the top cover 51 is maintained in a coupled state with the transparent case 53 by the top latch 57 which will be described later.

The bottom cover 52 may be formed in a corresponding shape to shield an opened bottom surface of the transparent case 53. A lower seal 523 is provided at a periphery of the lower cover 52 so that it is in close contact with the transparent case 53 while the lower cover 52 is closed, thereby sealing between the transparent case 53 and the lower cover 52.

And a transmission gear 59 may be provided at a center of the lower cover 52. The transmission gear 59 connects the compaction motor assembly 323 to the dust compaction unit 56 and transmits power so that the dust compaction unit 56 is driven by the drive of the compaction motor assembly 323.

One side of the lower cover 52 can be shaft-coupled to the lower end of the transparent case 53, and thus the lower cover 52 can be opened and closed by rotation to remove the dust. And the bottom cover 52 is held in the coupled state with the transparent case 53 by a bottom latch 58 described below. Therefore, the lower cover 52 can be selectively opened and closed by operating the lower latch 58.

And the first cyclone 54 is designed to filter the dust and foreign substances from the introduced air, and also to allow the air from which the dust and foreign substances are filtered to be introduced inside. The first cyclone 54 may include a cylindrical filter screen 541 having a plurality of holes and a dust filter 542 provided outside or inside the filter screen 541.

Therefore, the air introduced along the transparent housing 53 can be filtered by the filter unit 39, and the filtered air can be introduced into the interior of the filter screen 541, then can fall down, can pass through the guide unit 543, and can be in a first dust collecting space 501, which formed in a lower portion of the dust container 50. Meanwhile, the fine dust not filtered by the filter unit 39 may pass through the filter unit 39 and may be introduced into the second cyclone 55 to be separated therein.

The second cyclone 55 may include a plurality of sleeves 551 received inside the filter screen 541 and formed in a conical shape which becomes narrower towards the bottom. An upper end and a lower end of each of the sleeves 551 may be opened so that the fine dust is separated and discharged downward while the sucked air inside the sleeve 551 is rotated and the air from which the fine dust is separated flows up. The fine dust separated from the sleeve 551 can be stored in a second dust collection space 502, which is separate from the first dust collection space 501.

An inlet opening 551a through which the air is introduced may be formed at an upper portion of the sleeve 551. A guide vane 552 formed in a spiral shape along the inner circumference of the sleeve 551 is provided at the inlet port 551a to form a rotating flow of the introduced air.

A dip tube 553, on which an outlet opening 553a for discharging the air separated from the fine dust in the sleeve 551 is formed, is provided at the upper portion of the sleeve 551. The dip tube 553 shields an opened upper surface of the sleeve 551, and the outlet port 553a may be disposed at a center of the sleeve 551. And a cyclone cover 554 forming an upper surface of the second cyclone 55 is provided. The cyclone cover 554 is designed such that it is in communication with the outlet openings 553a of a plurality of dip tubes 553. The dip tube 553 and the cyclone cover 554 may be integrally formed, and the guide wing 552 may also be integrally formed with the dip tube 553. And the cyclone cover 554 may be coupled to and attached to the top cover or may be attached to the upper end of the transparent housing 53.

The air discharged upward through the outlet opening 553a of the dip tube 553 may flow through the top cover 52, may flow along an interior of the body part 30 through the discharge opening 512, and then may be discharged to the outside of the body part 30 through the back cover 314 .

The inner case 544 can hold the first cyclone 54 and the second cyclone 55, and can also divide the first dust collection space 501 and the second dust collection space 502. The inner case 544 may be formed into a cylindrical shape of which an upper surface and a lower surface are opened, and a diameter of its lower portion may be made smaller than that of its upper portion. Therefore, a space between the inner case 544 and the transparent case 53 may be defined as the first fine dust collection space 501 in which the dust separated by the first cyclone 54 is stored, and a space inside the inner case 544 may be defined as the second dust collection space 502 , in which the dust separated from the second cyclone 55 is stored.

An upper portion of the inner casing 544 is formed such that its diameter becomes narrower downward and also formed such that it receives a lower portion of the sleeve 551. And the guide unit 543 may be provided at the upper portion of the inner case 544.

The guide unit 543 serves to allow the air separated from the dust by the first cyclone 54 to be moved downward while rotating spirally, and may include a guide base 543a installed outside the inner case 544. and a wing 543b protruding from the guide base 543a.

The guide base 543a may be formed in a cylindrical shape and may be disposed outside the inner case 544. The guide base 543a may be coupled to the inner housing 544 or may be formed integrally with the inner housing 544. And the guide base 543a may be installed outside the inner case 544 so as to be rotatable. And the guide base 543a may be formed integrally with the dust compacting unit 56.

The vane 543b may be formed along a periphery of an outer surface of the base 31, and may be inclined such that a flow direction of the dust and air is forced into a spiral shape. At this point, a plurality of blades 543b may be arranged so that adjacent blades 543b at least partially overlap with each other as viewed from a top, and the dust and air may flow downward through a passage formed between adjacent blades 543b.

The dust guided by the wing 543b can pass through the wing 543b and then be stored in the first dust collection space 501. And the dust stored in the first dust collection space 501 cannot flow back in a backward direction but may remain in the first dust collection space 501 due to a structure of the vanes 543b which are formed to be inclined and vertically overlapped with each other.

Specifically, a backflow protection portion 531 is formed on the inner surface of the transparent case 53 corresponding to a portion of the vane 543b. The backflow protection portion 531 may be disposed at a predetermined regular interval along an inner circumference of the transparent case 53. The backflow protection portion 531 may be formed in a fin shape extending in a direction crossing the vane 543b.

Therefore, some of the dust flowing back in the first dust collecting space 501 collides with the backflow protection portion 531 during a process in which the blade 543b is rotated. Therefore, the dust does not pass through the blade 543b, falls down again, and then becomes primary condensed. That is, some of the dust that continuously flows upward repeatedly falls down through the vane 543b and the backflow preventing portion 531 and is then compacted while colliding with other dust.

The dust compacting unit 56 is provided at a lower portion of the inner case 544 and is configured to compact the dust stored inside the first dust collecting space 501 by rotation, thereby reducing a volume of the dust.

In particular, the dust compaction unit 56 may include a rotation section 561 and a pressure section 562. The rotating portion 561 is formed in a cylindrical shape and installed outside the inner case 544. The rotation portion 561 can be rotated independently according to a coupling state with the inner case 544, and can be configured to be rotated together with the inner case 544. Of course, the rotation portion 561 can also be rotated together with the guide unit 543 when coupled to the guide unit 543.

The pressure portion 562 may be formed to traverse the first dust collecting space 501 from a side of the rotation portion 561 to the inner surface of the transparent case 53. The pressure portion 562 may further be formed in a plate shape corresponding to a cross section of the first dust collecting space 501, and may divide an interior of the first dust collecting space 501. An inner wall (not shown) extending inwardly to overlap with the pressure portion 562 may be formed inside the first dust collecting space 501. The dust stored in the first dust collection space 501 can be compacted by normal and backward rotation of the pressure section 562 between the pressure section 562 and the inner wall. That is, the dust stored in the first dust collecting space 501 is secondarily compacted by the rotation of the pressure section 562.

A plurality of ventilation holes 562a may be formed on the printing portion 562 to resolve the resistance of air that may be generated when the printing portion 562 is rotated, and also to resolve a pressure imbalance between spaces divided by the printing portion 562. And the decoration member 563, which is in contact with the inner surface of the transparent case 53, may be installed at an extension end of the printing portion 562. The decorative member 563 may be formed in a square shape that is in surface contact with the transparent case 53, and may shield between the printing portion 562 and the transparent case 53. And the decorative member 563 may be formed of a wear-resistant material and may be formed of a lubricating material to allow the smooth rotation of the pressing portion 562.

Meanwhile, a pair of holding ribs 532 may be formed on an outer peripheral surface of the transparent case 53. The holders 532 may be formed to extend from an upper end of the transparent case 53 to its lower end. The holding ribs 532 may be formed to extend from an upper end of the transparent housing 53 to its lower end. And the holding ribs 532 are in contact with both of the left and right side ends of the opened front surface of the body part 30 when the Dust container 50 is installed, and carry out the exact installation of the dust container 50.

40 is an exploded perspective view illustrating a coupling structure of the top cover and the bottom cover of the dust container as viewed from one side. And 41 is a cross-sectional view showing a state in which the top cover is opened. And 42 is an exploded perspective view illustrating the coupling structure of the top cover and the bottom cover of the dust container as viewed from another side. And 43 is a cross-sectional view showing a state in which the bottom cover is opened.

As shown in the drawings, the top cover 51 and the bottom cover 52 may be installed at the upper end and the lower end of the transparent case 53, respectively, to shield the transparent case 53.

The top cover 51 can be held in a restricted state to the transparent case 53 by the top latch 57. And when it is necessary to disassemble and clean or maintain internal elements of the dust container 50, the top cover 51 can be separated from the transparent case 53 by operating the top latch 57.

The upper latch 57 may be installed on an upper latch installation portion 533 formed at the upper end of the transparent case 53. At this point, a lock rotation shaft 571 protruding from each of the two side surfaces of the upper lock 57 can be inserted into and installed in a lock hole 533a of the upper lock installation portion 533, and thus the upper lock 57 can be operated to be rotated.

And a lock spring 572 may be provided between the upper lock installation portion 533 and the upper latch 57 under the lock rotation shaft 571, and a lower portion of the upper latch 57 may be elastically supported by a spring installation portion 573 and a spring guide 533b.

The upper latch 57 may extend further than the upper end of the transparent case 53, and a hook portion 574 protruding in a hook shape may be formed at its extension end. The hook portion 574 can be inserted into a hook restriction portion 516 of the top cover 51 to be caught and restricted to each other while the top cover 51 is being installed.

An upper protrusion 517 may be formed on a side of the top cover 51 facing the hook restricting portion 516, and an upper groove 534 into which the upper protrusion 517 is inserted is correspondingly formed on an upper end of the inner surface of the transparent case 53 .

While the top cover 51 is installed, one end of the top cover 51 is fixed by a coupling between the top projection 517 and the top groove 534, and the other end of the top cover 51 is fixed by the top latch 57, and thus the top cover 51 is maintained in an installed state. And to separate the top cover 52, the restriction of one end of the top cover 51 is released by operating the top latch 57, and then the top projection 517 and the top groove 534 are separated from each other.

The lower cover 52 can be kept in a closed state by the lower latch 58, and the first dust collection space 501 and the second dust collection space 502 can be opened by opening the lower cover 52, and thus the dust in the first dust collection space 501 and the second Dust collection room 502 can be removed.

A lower cover shaft 521 is formed at one end of the lower cover 52. The lower cover shaft 521 is rotatably coupled to a lower cover coupling portion 535 formed at the lower end of the transparent case 53. Consequently, when the lower cover 52 is opened and closed, the lower cover 52 is rotated about an axis of the lower cover 52.

And the lower latch 58 is provided at the other end of the transparent case 53 corresponding to the lower cover coupling portion 535. The bottom latch 58 may be installed to be vertically displaceable, and thus the bottom cover 52 may be selectively restricted.

Specifically, a lower lock installation portion 536 is formed at the lower end of the transparent case 53 facing the upper lock installation portion 533. The lower lock installation portion 536 may be provided with a pair of protruding rips pen, and a locking slot 536a extending vertically is formed therein.

A housing catching portion 537 is formed between the projecting ribs of the lower lock installation portion 536. The case catching portion 537 protrudes from the lower end of the transparent case 53, and a lower hook 522 of the lower cover 52 can be caught and restrained while the lower cover 52 is closed.

And the lower lock 58 is formed recessed so that the lower lock installation portion 536 is received therein, and a lock projection 581 protruding inward is formed on each of both sides of an inner surface of the lower lock 58 and inserted into the lock slot 536a. Therefore, the lower latch 58 can be installed so that it is vertically movable while being installed on the lower latch installation portion 536.

And a pressing portion 582 extending downward may be formed on a recessed interior of the lower latch 58. The pressing portion 582 is in contact with the lower hook 522 formed on the lower cover 52 and is formed to have an inclined surface 582a. When the lower latch 58 is moved downward, the pressing portion 582 presses the lower hook 522 so that the lower hook 522 is separated from the case catching portion 537 and thus the lower cover 52 is opened.

An inclined surface 522a may be formed at an upper end of the lower hook 522. While the lower cover 52 is closed, the inclined surface 522a of the lower hook 522 is in contact with the inclined surface 582a of the pressing portion 582. In this state, when the lower latch 58 is moved downward, the pressing portion 582 presses the inclined surface 522a of the lower hook 522 and thus the lower hook 522 is elastically deformed. Therefore, the lower hook 522 can be detached from the case catching portion 537 due to the elastic deformation of the lower hook 522.

44 is an exploded perspective view showing a coupling structure of the bottom cover and a dust compaction unit. And 45 is an enlarged view of a B section in 41 .

As shown in the drawings, a bearing 593 may be installed at a center of the bottom cover 52. And the first transmission gear 591 may be provided on a lower surface of the lower cover 52. The first transmission gear 591 may be connected to the compression motor assembly 323 such that it is rotatable. When the dust container 50 is placed on the receiving part 32, the first transmission gear 59 is naturally connected to the compression motor assembly 323 so that it is rotatable.

A rotation shaft 591a of the first transmission gear 591 may be installed to pass through the bearing 593 and may be easily rotated by the bearing 593. And a second transmission gear 592 is disposed on an upper surface of the lower cover 52 and formed to be connected to the rotation shaft 591a of the first transmission gear 591 through the bearing 593. Consequently, the second transmission gear 592 can be rotated together with the first transmission gear 591.

The second transmission gear 592 is formed in a circular plate shape, and a plurality of gear portions 592a are formed along its circumference. The plurality of gear portions 592a may be coupled to a gear coupling projection 561a formed on an inner peripheral surface of the rotation portion 561 of the dust compaction unit 56.

That is, in an assembly operation of the dust container 50, when the lower cover 52 is closed while the dust compaction unit 56 is installed, the gear portion 592a of the second transmission gear 592 is matched with the gear coupling projection 561a of the dust compaction unit 56, and thus the dust compaction unit 56 can be driven.

Meanwhile, a coupling portion 592b may be formed in a center of an upper surface of the second transmission gear 592, and a receiving groove 592c in which a seal plate 594 sits may be formed outside the coupling boss 592b.

And a seal installation projection 592d is formed on a lower surface of the second transmission gear 592. A transmission gear seal 597 is installed on the seal installation projection 592d. The transmission gear seal 597 can be sealed by being in contact with the inner peripheral surface of the rotating portion 561. At this point, the transmission gear seal 597 is integral with the second transmission gear 592 coupled and they are rotated together when the second transmission gear 592 is rotated.

The seal plate 594 is formed in a circular plate shape, and an inner seal 595 that shields an opened lower surface of the inner case 544 is installed thereon. The inner seal 595 may be integrally coupled to seal installation portions 594a and 594b formed at an upper end of the seal plate 594. The inner seal 595 may be formed in a shape that corresponds to an opening of the inner housing 544.

The inner seal 595 may include a first seal portion 595a formed in a circular plate shape to be in contact with an opened lower end of the inner case 544, and a second seal portion 595b provided above the first seal portion 595a and into the interior of the inner case 544 is inserted to be in contact with an inner surface of the inner housing 544 and can seal the opening of the inner housing 544 in a fixed state.

The seal installation portions 594a and 594b include a first protruding portion 594a that protrudes from an upper surface of the seal plate 594 and a second protruding portion 584b that projects vertically outward from the first protruding portion 594a. Both the first protruding portion 594a and the second protruding portion 594b are inserted into a lower surface of the inner seal 595 and can firmly fix the inner seal 595 to the seal plate 594.

Meanwhile, a support rib 394c inserted into the receiving groove 592c may be formed on a lower surface of the seal plate 594. The support rib 594c is formed to be movable while being inserted into the receiving groove 592c.

And a shaft coupling hole 594d in which a shaft coupling member 596 for coupling the seal plate 594 to the second transmission gear 592 is fixed is formed at a center of the seal plate 594. The shaft coupling member 596 can be fixed through the shaft coupling hole 594d and the coupling boss 592b of the second transmission gear 592.

At this point, the coupling boss 592b is formed higher than the seal plate 594, and thus the shaft coupling member 596 does not press against the seal plate 594. Therefore, the seal plate 594 can be installed so that it is freely rotatable even while coupled to the second transmission gear 592 becomes.

That is, when the compression motor assembly 323 is driven while the dust container 50 is installed, the first transmission gear 591 and the second transmission gear 592 are rotated, and the rotation portion 561 gear-coupled to the second transmission gear 592 is also rotated, and thus can the dust compaction unit 56 can be driven.

At this point, since the seal plate 594 fitted to the second transmission gear 592 is coupled to be freely rotatable above the second transmission gear 592, the stopped state can be maintained even when the second transmission gear 592 is rotated. Therefore, the inner seal 595 installed on the seal plate 594 can be maintained in a state in which the lower surface of the inner case 544, i.e., the second dust collecting space 502, is shielded.

Hereinafter, the flow of dust and air in the vacuum cleaner when the main motor is driven will be described.

46 is a cross-sectional view showing a flow of air and dust in the cleaner body 10. And 47 is a top view showing the flow of air and dust in the cleaner body 10.

As shown in the drawings, when the user operates the vacuum cleaner 1, the driving of the main motor 35 starts, and the air containing the dust can be sucked by the suction unit 20 by a suction force generated by the main motor 35 .

The air containing the dust can be sucked through the connector 401 of the cleaner body 10 and then sucked into the dust container 50 through the suction port 511 of the dust container 50. And in the dust container 50, the dust and fine dust are separated by the first cyclone 54 and the second cyclone 55, and then are collected in the first dust collection room 501 and the second dust collection room 502, respectively.

Specifically, the air containing the dust introduced through the suction port 511 is introduced through the passageway 518 between the dust container 50 and the filter screen 541. At this point, the air and dust flowing through the passageway 518 flow in are directed while being rotated along an inner wall of the dust container 50.

As the flowing dust and air pass through the dust filter 542 and the filter screen 541, the dust may be primarily filtered and the filtered air may be introduced into a space inside the filter screen 541. And the separated dust falls down, passes through the guide unit 543, and then is stored in the first dust collection room 501. The dust collected in the first dust collection room 501 can be double-compacted by the dust compaction unit 56, the guide unit 543 and the backflow protection section 531 and then stored in the first dust collection room 501.

Meanwhile, the air that is filtered while passing through the dust filter 542 and the filter screen 541 is introduced into the inside of the sleeve 551 through the inlet port 551a of the sleeve 551. At this point, the air introduced into the sleeve 551 through the guide vane 552 disposed on one side of the inlet opening 551a forms a vortex flow along an inner wall of the sleeve 551.

In this process, the fine dust and the air are separated, and the fine dust is secondarily filtered. The fine dust separated in the sleeve 551 can fall down through an opened lower surface of the sleeve 551 and can be stored in the second dust collecting space 502. And the filtered air flows upward through the outlet opening 553a of the dip tube 553 and then flows outside the dust container 50 through the discharge opening 512.

The particulate matter in the air discharged through the discharge opening 512 may be secondarily filtered as the air passes through the pre-filter assembly 36. And the air which has passed through the pre-filter assembly 36 flows to an interior of the upper frame 34 and passes through the main motor 35. The air which has passed through the main motor 35 flows down through the plate hole 341a and passes through the filter unit 39 which is attached the lower frame 33 is installed.

As the air passes through the filter unit 39, the ultrafine dust contained in the air can be separated. Finally, the ultrafine dust can also be filtered tertiarily. Most of the filtered air is used to cool the battery unit 38 under the filter unit 39 and then discharged rearward through the back cover 314.

And some of the air that has passed through the filter unit 39 passes through the first barrier hole 331a. In this process, the noise filter 302 and the main PCB 301 are cooled. The air that cools the noise filter 302 and the main PCB 301 may be discharged from the inside of the body part 30 naturally or may be discharged through the back cover 314.

Meanwhile, in order to empty the dust container 50 after using the vacuum cleaner 1, first the pressing member 81 is pressed to operate the lock assembly 80 and the cover member 40 is opened. When the cover member 40 is fully opened, the cover member 40 is maintained in the opened state by the connecting assembly 90.

In this state, the dust container 50 is separated from the body part 30, and then the lower cover 52 can be opened by operating the lower latch 58. When the lower cover 52 is opened, all dust in the first dust collection space 501 and the second dust collection space 502 can be removed. And for cleaning and inspecting the dust container 50, the top cover 51 can also be opened by operating the upper latch 57, and thus internal elements of the dust container 50 can be separated and then cleaned and inspected.

After the dust container 50 is emptied, the dust container 50 is reinstalled on the body part 30, and then the cover member 40 is closed by rotating the cover member 40.

Meanwhile, when the vacuum cleaner 1 is used, the user moves it while gripping the handle 23. In this method, the driving of the cleaner body 10 can be controlled.

48 is a view showing a stop state of the cleaner body 10.

As shown in the drawing, while the cleaner body 10 is not moving and is in the stopped state, the center of gravity G of the cleaner body 10 is located further to a rear than the rotation center C of the moving wheel 60.

In this state, the cleaner body 10 is intended to be rotated clockwise (in a normal direction) based on the rotation center C of the moving wheel 60, and the second half portion 313 of the base 31 is lowered and the first half portion 312 is raised.

At this point, the rear wheel unit 70, which is in contact with the ground, prevents the second half portion 313 of the base 31 from excessively is lowered, the base 31 keeps elastic and allows the cleaner body 10 to be maintained in the stable state.

That is, both the moving wheel 60 and the rear wheel 70 are in contact with the ground, and the cleaner body 10 is supported on three points. Also, the back of the cleaner body 10, where the center of gravity is located, is in a lowered state, and thus the cleaner body 10 can maintain the stable position in the stopped state.

Therefore, the first half portion of the cleaner body 10 can be maintained at the target angle α regardless of the presence or absence of the dust in the dust container 50 or the amount of the dust. In this state, the detection part 306 can detect a position of the cleaner body 10 through its angle.

That is, the detecting section 306 confirms that the first half section 312 is held at the target angle α, determines that the cleaner body 10 is not moved and is maintained in the stopped state, and thus allows the wheel motor 632 not to be driven and is maintained in the stopped state.

49 is a view showing a driving state of the cleaner body 10.

As shown in the drawing, when the user moves forward while grasping the handle 23 to perform the cleaning operation, the suction hose 24 connected to the handle 23 is pulled. And since the connector 401 connected to the suction hose 24 is disposed on the cover member 40, the force is applied to a position above the rotation center C of the moving wheel 60. Consequently, the cleaner body 10 is rotated counterclockwise (in the reverse direction) by the torque based on the rotation center C of the moving wheel 60.

An angle β between the first half portion 312 and the ground can be changed according to an amount of force applied to the connector 401, but is smaller than the target angle α in the stopped state of the cleaner body 10. And even if that applied to the connector 401 Force becomes larger, the first half portion 312 is not in direct contact with the ground due to the front wheel 312a, and the front wheel 312a is in contact with the ground, and the vacuum cleaner 1 can be moved stably.

For example, while the vacuum cleaner 10 is being driven stably, the middle portion 311 is in a horizontal state with the ground. And due to the counterclockwise movement of the cleaner body 10, the first half portion 312 forms an angle of 20° with respect to the ground, and the second half portion 313 forms an angle of 10°. In this state, the cleaner body 10 can be operated ideally. However, the angle of the cleaner body 10 can be changed according to a current pulling force or a condition of the floor.

The detecting part 306 detects the position of the cleaner body 10 and determines the rotation of the moving wheel 60. When the angle β between the first half portion 312 and the ground is smaller than the target angle α, the detecting part 306 drives the wheel motor 632 and rotates the moving wheel 60 Counterclockwise. Due to the rotation of the moving wheel 60, the cleaner body 10 can be moved forward.

At this point, the detection part 306 can immediately drive the wheel motor 632 at the moment when the detected angle becomes smaller than the target angle α. If necessary, the wheel motor 632 may be driven when a change value detected by the detecting part 306 exceeds a specified range (e.g., 1° to 2°).

Meanwhile, since the detecting part 306 can detect a change in the angle β between the first half portion 312 and the ground, a rotation speed of the wheel motor assembly 63 can be controlled in proportion to the change in the angle. For example, when the angle β between the first half portion 312 and the ground quickly becomes smaller, a rotation speed of the wheel motor 632 also becomes faster, and thus the cleaner body 10 can be moved forward at a high speed. And as the angle β between the first half portion 312 and the ground decreases relatively slowly, the speed of the wheel motor 632 may become relatively slower.

As a distance from the user becomes closer due to the forward movement of the cleaner body 10, the force applied to the connector 401 may become smaller or eliminated. When the force applied to the connector 401 is removed, the cleaner body 10 is rotated clockwise based on a rotation center of the moving wheel 60 and is in the in 46 shown condition. At this point, the detecting part 306 can confirm that the angle between the first half portion 312 and the ground is the target angle α, and thus can stop driving the wheel motor assembly 63.

Therefore, when the user moves while grasping the handle 23 to use the vacuum cleaner 1, the force is applied to the connector 401 and the cleaner body 10 is moved forward. And as the cleaner body 10 moves forward and the distance to the user becomes closer, the force applied to the connector 401 becomes weaker. When the force applied to the connector 401 becomes weaker, the cleaner body 10 is stopped while rotating clockwise due to the center of gravity.

Meanwhile, in a state in which the vacuum cleaner 1 is driven, the angle between the lower surface of the dust container 50 or the first half portion 312 and the floor (the floor surface) is smaller than the target angle (α <target angle <β), the Drive of the wheel motor 63 can be slowed down. That is, a predetermined speed is maintained up to the target angle, and its deceleration begins when the detected angle reaches the target angle, and the wheel motor assembly 63 is stopped when the detected angle is the target angle. Of course, the determination of the angle can be achieved based on the middle section 311 and the second half section 313 instead of the first half section 312.

When such a process is repeated, the cleaner body 10 follows the user according to the user's movement, and thus, although the user does not perform a separate operation to move the cleaner body 10, independent movement can be achieved.

Since the first half portion 312 is formed to be inclined, the cleaner body 10 can be effectively moved over the door sill or obstacle when the door sill or obstacle is on its front while being driven. That is, even in a situation where the obstacle is generated, the cleaner body 10 can be driven stably and can be continuously moved over the obstacle.

And when it is necessary to move over a high obstacle or the user lifts the handle 23, the cleaner body 10 is rotated clockwise based on the center of the moving wheel 60, and thus the second half portion 313 can be moved toward the ground . At this point, the rear wheel unit 70 is in the contact state with the ground and can prevent the second half portion 313 from being excessively lowered or overturned. And the rear wheel unit 70 elastically holds the second half portion 313 so that the cleaner body 10 in the in 46 The state shown is when the external force is removed from the cleaner body 10.

Meanwhile, the cleaner body 10 can detect the obstacle O while being driven. When the obstacle O is detected, the cleaner body 10 can be driven while avoiding the obstacle by controlling the drive of the moving wheel 60.

50 is a view showing an obstacle avoidance driving state of the cleaner body.

When the cleaner body is driven as shown in the drawing or the traveling starts from the stopped state, the obstacle O can be detected by the obstacle detection element 44. The plurality of obstacle detection elements 44 are provided on the front surface of the cover member 40 formed in the curved surface shape. After the obstacle detection element 44 detects the obstacle O that is within a specified angular range, obstacle bypass driving is performed.

For example, as shown in the drawing, when the obstacle O is detected by the front sensor 44c of the obstacle detection element 44 while the cleaner body 10 is being driven, a location of the obstacle O is calculated by the main PCB 301 or the detection PCB 360a .

And when the position of the obstacle O is calculated, the main PCB 301 may allow one of the moving wheels 60 arranged on both of the left and right sides, which is closer to the obstacle O, to be rotated faster, thereby determining a direction of travel of the cleaner body 10 is changed to bypass the obstacle O.

At this point, the main PCB 301 can drive only one of the wheel motors 632 arranged on both sides, and can also bypass the obstacle O by making a rotation speed of each of the wheel motors 632 different from each other or making their rotation direction different.

And the rotation speed of each of the wheel motors 632 may be decelerated according to a distance from the obstacle detected by the obstacle detection element 44. That is, when the obstacle O is detected from a long distance, the speed of the wheel motors 632 may become relatively slower, and when the obstacle O is detected from a short distance, the speed of the wheel motors 632 may become relatively faster.

As described above, even if the separate operation to bypass the obstacle O is not performed, it is possible to drive while the obstacle O is actively avoided by the obstacle detection element 44.

In the embodiment of the present invention, the forward movement of the cleaner body 10 has been described. However, since the second half portion 313 also has an inclined state, the cleaner body 10 can be automatically moved backward according to a change in the angle of the second half portion 313.

51 is a view showing a detection area of the obstacle detection element.

As shown in the drawing, the obstacle detection element 44 detects the obstacle that is within a specified detection distance L. For example, the obstacle detection element 44 may have a detection distance of approximately 650 mm.

At this point, the detection distance L of the obstacle detection element 44 can be set to a distance at which the ground is not detected when the cleaner body 10 is rotated counterclockwise and the front wheel 312a is in contact with the ground.

If the detection distance L is too long, there is a problem that the ground may be detected as the obstacle when the first half portion 312 of the cleaner body 10 is rotated counterclockwise. In contrast, if the detection distance L is too short, the bypass movement should be performed very quickly after the obstacle located in front of the cleaner body 10 is detected, and thus inconvenience to the user may occur even if the bypass movement is carried out, the obstacle cannot be completely avoided.

The obstacle detection element 44 can therefore have the fixed detection distance L at which the ground is not detected when the cleaner body 10 is rotated, and driving can be performed while effectively avoiding the obstacle.

Meanwhile, since the obstacle detection element 44 is disposed on the front surface of the cover member 40, which is the foremost end of the cleaner body 10, an emission angle of the obstacle detection element 44 can be set so that even if an angle of the cleaner body 10 is changed, the ground does not can be detected, and the obstacle can be detected effectively.

For example, when the obstacle detecting element 44 is provided on a lower surface of the cleaner body 10 or in a deep position, the light emitted from the obstacle detecting element 44 cannot other than be directed to the ground, and a detection error may be generated due to detection of the ground . In particular, due to a characteristic of the cleaner body 10 being rotated, it is important to select a position at which the obstacle is distinguished while not detecting the floor.

52 is a view illustrating a wall surface driving state of the cleaner body 10.

As shown in the drawing, the cleaner body 10 can be moved along a wall surface of a room or furniture to perform the cleaning operation. When the cleaner body 10 is moved along the wall surface, the cleaner body 10 should detect the wall surface, should be moved along the wall surface without bypassing the wall surface, and then should be rotated after completely escaping the corner.

For this purpose, the obstacle detection element 44 can be set up in such a way that the front sensors 44b and 44c and the side sensors 44a and 44d have detection distances L1 and L2 that are different from one another. The detection distance L1 of the front sensors 44b and 44c can be set longer than the L2 of the side sensors 44a and 44d. For example, if each of the front sensors 44b and 44c has a detection distance L1 of about 650 mm, each of the side sensors 44a and 44d may be configured to have a detection distance L2 of about 300 mm.

When the detection distance L2 of each of the side sensors 44a and 44d is the same or longer than the L1 of each of the front sensors 44b and 44c, the wall surface is too far away due to the detection distance L2 of each of the side sensors 44a and 44d and the front sensors 44b and 44c cannot detect the wall surface. Finally, a situation occurs in which all of the front sensors 44b and 44c and the side sensors 44a and 44d cannot detect, and thus the wall surface cannot be detected. Therefore, when the detection distance L2 of each of the side sensors 44a and 44d is shorter so that the cleaner body 10 is located closer to the wall surface, the front sensors 44b and 44c and the side sensors 44a and 44d detect the wall surface at the same time.

Meanwhile, when the front sensors 44b and 44c and the side sensors 44a and 44d simultaneously detect the obstacle while the cleaner body 10 is being moved, the obstacle can be regarded as the wall surface, and thus the cleaner body 10 can be moved along the wall surface without the bypass movement . That is, driving is performed while maintaining a state in which the front sensors 44b and 44c and the side sensors 44a and 44d detect the wall surface.

When the cleaner body 10 is continuously moved along the wall surface and then the absence of the obstacle is determined by the front sensors 44b and 44c and the absence of the obstacle is also determined by the side sensors 44a and 44d, it is determined that the cleaner body 10 is a corner has passed the wall surface, and the cleaner body 10 can be moved in a direction of the corner.

At this point, after the absence of the obstacle is also determined by the side sensors 44a and 44d, the cleaner body 10 can be further moved forward a predetermined distance and then rotated. That is, the cleaner body 10 can be rotated after completely passing the corner, and thus a rear portion of the cleaner body 10 can be prevented from colliding with the wall surface.

The present invention may have various other embodiments besides the embodiment described above.

The remaining construction of another embodiment of the present invention, except for a part, will be the same as that of the embodiment described above, and like terms refer to like or corresponding elements and their repeated description will be omitted.

53 is a view illustrating a state in which a body part of the cleaner body according to another embodiment of the present invention is inclined forward. And 54 is a view showing a state in which the cleaner body is tilted backward. And 55 is a view showing a structure of a holding member according to another embodiment of the present invention.

53 is a bottom view of a cleaner body according to another embodiment of the present invention. And 54 is an exploded perspective view illustrating a coupling structure of a rear wheel unit according to another embodiment of the present invention. And 55 is an exploded perspective view of the rear wheel assembly.

As shown in the drawings, a rear wheel unit 2170 may be provided on the base 31. A base recess portion 31 1b recessed inwardly is formed at a rear end of the center portion 311 of the base 31. And a wheel installing portion 311c for installing the rear wheel unit 2170 is formed at a front end of each of both side surfaces of the base recess portion 311b.

The rear wheel unit 2170 is in contact with the ground while the cleaner body 10 is not moved, and allows the cleaner body 10 to be maintained at a fixed position. And the rear wheel unit 2170 is in contact with the ground while the cleaner body 10 is rotated, so that the first half portion 312 is raised, also provides elasticity for the backward rotation of the cleaner body 10, and thus can prevent the cleaner body 10 from being excessively rotated or overturned becomes.

The rear wheel unit 2170 may include a holding part 2171 and a wheel part 2172. The holding part 2171 may be installed on a lower surface of the cleaner body 10, and can elastically hold the cleaner body 10 when the cleaner body 10 is inclined. And the wheel part 2172 is installed on the holding part and may be designed to be rolled while in contact with the ground.

Specifically, the holding part 2171 may be formed in a shape accommodated in the base receiving portion 311b. And an installation protrusion 2711 may be formed on both side surfaces of one end of the holding part 2171. The installation projection 2711 may be formed to protrude on both sides, and may be rotatably inserted and installed in the wheel installation portion 311c. Therefore, the holding part 2171 is formed to be rotatable around the installation projection 2711 while being installed on the base recess portion 311b.

And an opening portion 2712 may be formed between the installation projections 2711, and the elastic portion 2713 may be formed inside the opening portion 2712. The opening section 2712 can be designed like this may be formed to pass through the holding part 2171, and the elastic portion 2713 may be disposed at an inner portion of the opening portion 2712.

A plurality of reinforcing ribs 2713a may be formed at one end of the opening portion 2712, and can prevent the holding part 2171 from being deformed or broken even if the elastic portion 2713 is deformed. The plurality of reinforcing ribs 2713a may be continuously disposed between the installation projections 2711, and may also be disposed to be spaced apart at regular intervals.

The elastic portion 2713 may be provided inside the opening portion 2712 and may extend rearward from a front end of the holding part 2171. And the elastic portion 2713 may extend to be rounded with a predetermined curvature so that its extension end is directed toward the base 31. Also, the elastic portion 2713 may be formed in a plate shape and may extend so as to be elastically deformed when in contact with the base 31.

The elastic portion 2713 may be formed to extend from a front of an interior of the opening portion 2712 toward its rear, and may also be formed to be rounded upward with a curvature. And the elastic portion 2713 may be formed in a plate shape with a predetermined thickness, and may be formed such that its extension end faces the lower surface of the cleaner body 10. Therefore, when the cleaner body 10 is inclined, the lower surface of the cleaner body 10 can press the elastic portion 2713, and the elastic portion 2713 can hold the cleaner body 10 from its bottom while being elastically deformed.

Specifically, the extension end of the elastic portion 2713 may be in contact with the base 31 while the cleaner body 10 is in a stopped state. At this point, a rear wheel 2174 may be in contact with the ground. Therefore, the cleaner body 10 can be supported by the pair of moving wheels 60 and the rear wheel 2174 provided behind the moving wheels 60 and thus maintained in a stable state. The rear wheel 2174 may be disposed between the pair of moving wheels 60 and may be disposed further to a rear than the moving wheels 60, and thus the cleaner body 10 is supported at three points on the floor and can be maintained in a stably maintained state.

And at a moment when the cleaner body 10 is stopped during movement, the center of gravity of the cleaner body 10 is arranged on a back side, and the cleaner body 10 can be rotated in a direction in which the second half portion of the cleaner body 10 is lowered. Therefore, the elastic portion 2713 and the base 31 can be in contact with each other by the rotation of the cleaner body 10, and the elastic portion 2713 can be elastically deformed and thus elastically hold the second half portion of the vacuum cleaner.

In such a state, the second half portion of the cleaner body 10 can be maintained in the stable state, and even if the second half portion of the cleaner body 10 is suddenly rotated in the direction in which the second half portion of the cleaner body 10 is lowered, an impact on the cleaner body may occur 10 applied shock can be mitigated. And due to the elastic deformation of the elastic portion 2713, the cleaner body 10 can be prevented from being excessively rotated or overturned even though the moving and stopping of the cleaner body 10 are repeatedly performed. Even if the cleaner body 10 whose second half portion is heavy is moved and then stopped, the second half portion of the cleaner body 10 can be prevented from directly colliding with the ground, and thus damage to the cleaner body 10 can be prevented and impact noise can also be prevented become.

Even while no external force is applied to the cleaner body 10 for operating the cleaner body 10, the cleaner body 10 can always be held at a constant angle due to an elastic force provided by the elastic portion 2713. That is, the cleaner body 10 can always be maintained at a constant inclination based on the stopped state, so that a change in inclination is easily and immediately detected when an operation for moving the vacuum cleaner 10 is performed.

Meanwhile, while the cleaner body 10 is moved, the holding part 2171 is changed from the stopped state to a rotating state around the installation projection 2711, and the rear wheel 2174 is in contact with the ground, but the elastic portion 2713 is in a state spaced apart from the base 31 , and thus the elastic force is not provided to the cleaner body 10 does not and has no influence on the movement or driving of the cleaner body 10.

Of course, when the holding part 2171 is rotated to a target angle or more, one end of the holding part 2171 interferes with the base recess portion 311b or the base 31, and thus the holding part 2171 cannot be rotated further. Therefore, in the case where the cleaner body 10 is rotated to the target angle or further when it is rotated so that its first half portion is lowered while being driven, the rear wheel 2174 can be spaced from the ground.

Meanwhile, a rotary installation portion 2714 to which the wheel part 2172 is installed may be formed on the holding part 2171. The rotary installation portion 2714 may be formed on a lower surface of the holding part 2171, and may be disposed further on a back side than the opening portion 2712. And the rotary installation portion 2714 may be formed to be recessed, thereby receiving the wheel portion 2172 therein. Therefore, the wheel part 2172 can be installed while being housed inside the rotary installation portion 2714.

And a rotation hole 2715 may be formed on the rotation installation portion 2714. The rotation hole 2715 may be formed at a center of the rotation installation portion 2714, and may be formed to pass through the holding part 2171. A head receiving rib 2715a for receiving a shaft head 2751 of a rotating shaft 2175 may be further formed around the rotating hole 2715 of an upper surface of the holding part 2171. Also, the shaft head 2751 can be attached by a fitting operation, a gluing operation or a separate connection operation.

And further, a contact rib 2715b may be formed around the rotation hole 2715 of the lower surface of the holding part 2171. The contact rib 2715b is formed to protrude downward and also to be in contact with an upper surface of a rotary member 2173. Therefore, the rotating member 2173 can be spaced from a lower surface of the holding part 2171, and friction and interference when the rotating member 2173 is rotated can be minimized.

The wheel part 2172 may include the rotating member 2173 on which the rear wheel 2174 is installed, and the rotating shaft 2175 that allows the rotating member 2173 to be rotatably installed on the holding part 2171.

The rotation shaft 2175 may be installed in the rotation hole 2715. The rotating shaft 2175 serves to install and fix the rotating member 2173 as a member of the wheel part 2172, and may be installed so as to pass from its upper surface to its lower surface through the holding part 2171.

The shaft head 2751 may be formed at an upper end of the rotating shaft 2175, and a shaft 2752 extending downward may be formed at a center of the shaft head 2751. The shaft 2752 may extend a predetermined length to be inserted and installed in the rotary member 2173, and may be formed to have a size smaller than a diameter of the rotary hole 2715.

The shaft 2752 is inserted into the rotating hole 2173, and the rotating member 2173 may be configured to be rotatable around the shaft 2752. A restriction groove 2752a may be formed on a circumference of the shaft 2752. The restriction groove 2752a may be coupled to a restriction projection of the rotating member 2173, and may allow the shaft 2752 not to be separated from the rotating member 2173 but to be maintained in a coupled state.

The rotating member 2173 can be rotated in a direction intersecting with a rolling direction of the rear wheel 2174, and can allow the cleaner body 10 to change its direction easily. For this purpose, the rotating member 2173 may be installed inside the rotating installation portion 2714. And the upper surface of the rotating member 2173 may be formed into a circular flat surface shape corresponding to a shape of the rotating installation portion 2714.

The rotating member 2173 may be formed such that its upper surface is opened, and a shaft hub 2731 into which the rotating shaft 2175 is inserted may be formed at its center. The shaft hub 2731 is formed to have an inner diameter slightly larger than a diameter of the rotary shaft 2175, so that the rotary member 2173 is rotatable about the rotary shaft 2175.

A restriction projection 2731a, which is restricted in the restriction groove 2752a, may be formed inside the shaft hub 2731. The restriction projection 2731a may be formed at a position corresponding to the restriction groove 2752a while the rotation shaft 2175 is fully inserted. And the rotating shaft 2175 can be captured and restricted by the restricting projection 2731a from being separated, and thus can be formed such that that it can be rotated inside the shaft hub 2731.

Meanwhile, a shaft holding projection 2731b that projects upward may be formed on a lower surface inside the shaft hub 2731. The shaft holding projection 2731b is formed to protrude upward, thereby holding a lower end of the rotating shaft 2175 while the rotating shaft 2175 is fully inserted. Therefore, the rotating shaft 2175 can be prevented from being excessively inserted into the shaft hub 2731, and also can be allowed to maintain the restricting projection 2731a and the restricting groove 2752a in a mutually restricted state at an accurate position.

A plurality of rotary member reinforcing ribs 2732 may be formed radially along an outer circumference of the shaft hub 2731. The plurality of rotating member reinforcing ribs 2732 extend from the shaft hub 2731 to a periphery of the rotating member 2173 and may be arranged to rotate at regular angles centered on the shaft hub 2731. Each of the plurality of rotary member reinforcing ribs 2732 may be formed to have the same height as that of the shaft hub 2731 and cannot interfere with the rotary installation portion 2714 when the rotary member 2173 is rotated.

Meanwhile, a wheel receiving portion 2733 may be formed to be recessed at an end of the rotating member 2173 away from the shaft hub 2731. The wheel receiving portion 2733 may be formed in a direction facing the elastic portion 2713, and may be formed to be recessed from a side surface of the rotating member 2173. The wheel receiving portion 2733 may be opened up and down, and the rear wheel 2174 may be accommodated therein.

A lower end of the rear wheel 2174 may be disposed on a lower side than a lower end of the rotating member 2173 while being accommodated in the wheel receiving portion 2733, and the rear wheel 2174 may be rolled while being installed on the rotating member 2173.

And a wheel installation groove 2734 may be formed at a lower end of the wheel receiving portion 2733. The wheel installation groove 2734 may be formed at positions on both sides of the wheel receiving portion 2733 opposing each other, and may allow the rear wheel 2174 to be inserted and installed from its bottom toward its top. The wheel installation groove 2734 may be formed to correspond to a wheel shaft 2741 of the rear wheel 2174, and may enable the wheel shaft 2741 to be fitted, installed and fixed to the rotating member 2173.

Of course, a diameter of an opened lower end of the wheel installing portion 311c may be made a little smaller than that of the wheel shaft 2741, if necessary, and an inner diameter of the wheel installing portion 311c may be made a little larger than the diameter of the wheel shaft 2741, so that the rear wheel 2174 may be rotatably installed and attached to the wheel receiving portion 2733.

The rear wheel 2174 may be rotatably installed on the rotating member 2173 and may be formed to protrude further downward than the lower end of the rotating member 2173 and thus may be in contact with the ground. Therefore, the rear wheel 2174 can be rolled while in contact with the ground, and thus can allow the cleaner body 10 to be moved smoothly.

The rear wheel 2174 may include the wheel shaft 2741, a wheel bearing 2742 and a contact portion 2743. The wheel shaft 2741 serves as a rotation center of the rear wheel 2174 and may be formed to pass through a central portion of the rear wheel 2174 to protrude in both directions. And the wheel shaft 2741 may be installed and fixed to the wheel installation portion 311c of the rotating member 2173.

The wheel bearing 2742 is installed and fixed on the wheel shaft 2741 and connects the contact portion 2743 to the wheel shaft 2741 to be rotatable. Therefore, the contact portion 2743 can be rotated around the wheel shaft 2741.

The contact portion 2743 forms an outer periphery of the rear wheel 2174 and may be installed and fixed to an outside of the wheel bearing 2742. And the contact portion 2743 may be formed of a rubber or urethane material, and may be formed to be rolled when in contact with the ground.

Meanwhile, the contact portion 2743 in the rear wheel 2174 can be installed and fixed directly to the wheel shaft 2741 without the wheel bearing 2742. And the wheel shaft 2741 and the contact portion 2743 may be integrally formed. In this case, the wheel shaft 2741 may be rotatably installed on the rotating member 2173, and in the rear wheel 2174, the wheel shaft 2741 and the contact portion 2743 are rotated together.

The rear wheel 2174 may be in contact with a floor surface, ie, a surface to be cleaned, while the cleaner body 10 is stopped or tilted at a predetermined angle. In this state, the rear wheel 2174 can be rotated when the cleaner body 10 is moved, and thus can enable the cleaner body 10 to be moved more smoothly.

When the user changes a direction of the cleaner body 10 while the rear wheel 2174 is in contact with the surface to be cleaned, the rotating member 2173 can be rotated, and the rear wheel 2174 can be kept in the contact state with the surface to be cleaned, and thus can enable that the change of direction and the movement of the cleaner body 10 are carried out more easily. Of course, the movement of the cleaner body 10 and its change of direction due to its rotation can be performed simultaneously by the rotation of each of the rotating member 2173 and the rear wheel 2174. Even in such a state, the cleaner body 10 can be maintained in the stably maintained state.

Hereafter, an operating state of the rear wheel unit 2170 will be described in detail with reference to the drawing.

56 is a cross-sectional view showing an operating state of the rear wheel unit. And 57 is a bottom view showing an operating state of the rear wheel unit.

As shown in the drawings, the cleaner body 10 is rotated about its rotation center according to the moving or stopping state of the cleaner body 10. And the rear wheel unit 2170 may selectively be in contact with the surface to be cleaned according to the rotation of the cleaner body 10.

When the rear wheel unit 2170 is in contact with the surface to be cleaned, the rear wheel unit 2174 may be rolled while in contact with the surface to be cleaned. And the rear wheel unit 2170 can be rotated counterclockwise around the installation boss 2711.

The elastic portion 2713 is in contact with the lower surface of the cleaner body 10 by the rotation of the rear wheel unit 2170 and can be in an in 56 be the condition shown. As shown in the drawing, the elastic portion 2713 is in a state not deformed with a relatively large curvature.

In this state, when a moving speed of the cleaner body 10 becomes slower or its moving state is changed to the stopped state, the second half portion of the cleaner body 10 comes closer to the surface to be cleaned. When the cleaner body 10 is inclined so that its second half portion comes closer to the surface to be cleaned, the elastic portion 2713 holds a lower surface of the base 31 while being elastically deformed. That is, the second half portion of the cleaner body 10 can be elastically held by elastic deformation of the elastic portion 2713, and thus can be held so as not to collide with the surface to be cleaned.

Meanwhile, while the rear wheel unit 2170 is in contact with the surface to be cleaned, the change in direction of the cleaner body 10 may also be permitted. While the cleaner body 10 is stopped or the second half portion of the cleaner body 10 is in contact with the surface to be cleaned and thus lowered, the rear wheel 2174 can be rolled in the contact state with the ground.

In this state, when the direction of the cleaner body 10 is changed, the rotating member 2173 is rotated clockwise or counterclockwise around the rotating shaft 2175. Therefore, even when the rear wheel unit 2170 is in contact with the surface to be cleaned and thus is in the stable maintained state, the rotation operation and the change of direction of the cleaner body 10 can be easily performed.

The present invention may have various other embodiments besides the embodiment described above.

The remaining construction of yet another embodiment of the present invention, except a part thereof, will be the same as the embodiment described above, and like terms refer to like or corresponding elements and their repeated description will be omitted.

58 is a view illustrating a state in which a body part of the cleaner body is inclined forward. And 59 is a view showing a state in which the cleaner body is tilted backward. And 60 is a view showing a structure of a holding part.

Referring to 58 until 60 A cleaner body 1000 includes a body part 1110, a moving wheel 1120 and a battery 1130.

A dust container 1105 in which the dust sucked by a suction unit 1160 is stored may be provided on the body part 1110. A pair of motion wheels 1120 may each be coupled to both sides of the body part 1110. The battery 1130 may be separably coupled to the body part 1110.

A portion of the cleaner body 1000 in which a connector 1103 is installed can be defined as a front based on a straight line V passing through a rotation center of the moving wheel 1120, and a portion thereof in which the battery 1130 is disposed is can be defined as a back. Likewise, the case where the body part 1110 is rotated forward is a case where the body part 1110 is shown in the drawing (referring to 58 ) is rotated counterclockwise, and the case in which the body part 1110 is rotated backward is a case in which the body part 1110 is rotated clockwise (referring to 59 ).

The cleaner body 1000 may further include a drive part for driving the moving wheels 1120. And the cleaner body 1000 can control the driving of the moving wheels 1120 by a control part according to detection information of a detection part for detecting the movement of the cleaner body 1000.

When the detection part is in an OFF state, the moving wheels 1120 cannot be driven. In this case, the body part 1110 is tilted according to a position of a center of gravity. For example, if the center of gravity of the body part 1110 is on a front side of the straight line V passing through the center of rotation of the moving wheel 1120, the body part 1110 becomes as shown in 58 shown, inclined forward, and when the center of gravity of the body part 1110 is located on a rear side of the straight extending line V, the body part 1110 becomes as shown in 59 shown tilted backwards.

When the detection part is turned on, the control part can control the driving of the moving wheels 1120 so that the center of gravity of the body part 1110 is located on the straight line V passing through the rotation center of the moving wheel 1120. In this case, a lower surface B of the body part 1110, as in 59 shown, also be spaced from a ground surface G.

The cleaner body 1000 may further include a rear wheel unit 1140. The rear wheel unit 1140 may be disposed on a rear side of the lower surface of the body portion 1110 and may serve to limit an angle at which the body portion 1110 is tilted backward.

The rear wheel unit 1140 may further include an extension portion 1144. An auxiliary wheel 1142 may be rotatably connected to one side of the extension portion 1144. The other side of the extension portion 1144 may be rotatably connected to the body portion 1110 by a rotation shaft 1146. And the extension portion 1144 can be rotated up or down within a range a-a'.

The rear wheel unit 1140 may further include an elastic member 1150. For example, the elastic member 1150 may be a torsion spring. One end 1152 of the elastic member 1150 may be held by the body part 1110, and its other end 1153 may be held by the extension portion 1144. The elastic member 1150 can apply an elastic force so that the extension portion 1144 is rotated clockwise in the drawing.

When the body part 1110 is tilted forward to the maximum, a front portion of the lower surface B of the body part 1110 may be in contact with the ground surface G. Thus, a maximum forward rotation angle of the body part 1110 can be limited.

On the other hand, when the body part 1110 is tilted backward, the rear wheel unit 1140 may be in contact with the ground surface G. Consequently, a maximum reverse rotation angle of the body part 1110 can be limited. Therefore, the body part 1110 can be prevented from tipping forward or backward.

The lower surface B of the body part 1110 can form a predetermined angle θ with respect to the ground surface G when the body part 1110 is maximally tilted backwards. At this point, the angle θ between the lower surface B of the body part 1110 and the ground surface G may be about 17° to 20°.

A cover 1131 may be provided on the battery 1130. While the battery 1130 is installed on the body part 1110, the cover 1131 may be exposed to the outside. Therefore, the cover 1131 can form at least a part of the body part 1110. Likewise, the user can connect/disconnect the battery 1130 to the body part 1110 without disassembling the body part 1110.

Hereafter, a method in which the battery 1130 is installed on or separated from the body part 1110 will be described in detail. However, the following descriptions are limited to the cases where the center of gravity of the body part 1110 is located at the front when the battery 1130 is separated from the body part 1110, and the center of gravity of the body part 1110 is located at the rear when the battery 1130 with the body part 1110 is coupled.

61 is a view sequentially illustrating a method in which a battery is coupled to the cleaner body.

61A is a view illustrating a state in which the battery 1130 is separated from the body part 1110, and 61B is a view illustrating a state in which the battery 1130 is coupled to the body part 1110, and 61C is a view illustrating a state in which the body part 1110 is tilted backward.

A battery coupling portion 1107 to which the battery 1130 is coupled is formed on the body part 1110. The battery coupling portion 1107 may be formed by recessing a part of the body part 1110.

The battery coupling portion 1107 is formed on a bottom of the body part 1110, and thus the battery 1130 is coupled to the bottom of the body part 1110. For example, while the battery 1130 is installed on the body part 1110, the center of gravity of the battery 1130 may be located on a lower side than the rotation center of the moving wheel 1120.

Therefore, since the center of gravity of the battery 1130 can be shifted downward when the battery 1130 is coupled to the body part 1110, the driving stability of the cleaner body 1000 can be improved.

When the battery 1130 is coupled to the bottom of the body part 1110, an advantage is that the driving stability of the cleaner body 1000 is improved. However, since the battery 1130 should be coupled to the bottom of the body part 1110, it may be inconvenient for the user to dock the battery 1130.

However, while the battery 1130 is separated from the body part 1110, the center of gravity of the body part 1110 may be located on a front side of the straight line passing through the center of the moving wheel 1120. Therefore, when the battery 1130 is separated from the body part 1110, the body part 1110 can be tilted forward around the motion wheel 1120.

When the body part 1110 is inclined, the front portion of the lower surface of the body part 1110 comes into contact with the ground surface. At this point, the battery coupling portion 1107 is directed obliquely upward. Therefore, the user can easily dock the battery 1130.

The battery 1130 can be coupled in an oblique direction with respect to the body part 1110 through a coupling guide portion provided at the battery coupling portion 1107. In particular, an insertion direction S of the battery 1130 can form an acute angle with respect to the straight line V and also the ground surface. Therefore, when the front portion of the lower surface of the body part 1110 is in contact with the ground surface, the insertion direction S of the battery 1130 forms the acute angle with respect to the ground surface.

When the battery 1130 is coupled to the body part 1110, the center of gravity of the body part 1110 may be shifted rearward. That is, while the battery 1130 is coupled to the body part 1110, the center of gravity of the body part 1110 may be located at the rear of the straight line passing through the center of the motion wheel 1120.

In other words, when the battery 1130 is coupled to the body part 1110, the body part 1110 can be tilted backward about the motion wheels 1120. At this point, the rear wheel unit 1140 is selectively in contact with the ground surface. At this point, the lower surface B of the body part 1110 forms a predetermined angle θ with respect to the ground surface G.

62 is a view sequentially illustrating a process in which a battery is separated from the cleaner body.

In particular poses 62A represents a state before the battery 1130 is separated from the body part 1110, and 62B represents a state in which the battery is separated from the body part 1110.

To disconnect the battery 1130 from the body part 1110, the user may directly apply a force to the body part 1110 and may tilt the body part 1110 forward. Then the user can disconnect the battery 1130 in a direction opposite to the insertion direction S.

When the battery 1130 is separated from the body part 1110, the center of gravity of the body part 1110 is shifted forward again. Therefore, the body part 1110 can be maintained in a forward inclined state.

As described above, in the vacuum cleaner of the present invention, while the battery 1130 is installed on the body part 1110, the body part 1110 can be rotated backwards, and thus the lower surface of the body part 1110 can be spaced from the floor surface. That is, the body part 1110 can be supported on two points when moving by the movement wheels 1120. In this case, the cleaner body 1000 can climb over an obstacle more easily, and since the driving friction acting on the moving wheels 1120 can be reduced, a labor required when the user moves the cleaner body 1000 can also be reduced.

When the battery 1130 is separated from the body part 1110, the center of gravity of the body part 1110 is moved forward, and the body part 1110 is rotated forward, and thus the battery coupling portion 1107 provided on a rear bottom of the body part 1110 is moved upward. Consequently, the user can easily couple the battery 1130 to the battery coupling portion 1107.

The vacuum cleaner according to the embodiment of the present invention is characterized by comprising: a cleaner body; a moving wheel provided on the cleaner body and configured to rotatably hold the cleaner body; a wheel motor assembly provided on the cleaner body and configured to rotate the moving wheel; a suction hose constructed to connect a suction part for sucking dust to the cleaner body; a suction unit in which the suction hose is connected to the cleaner body at a position spaced from a rotation center of the moving wheel; a detection part provided inside the cleaner body and configured to detect an inclination of the cleaner body; and a PCB configured to drive the wheel motor assembly when the inclination of the cleaner body detected by the detecting part deviates from a target angle, with a center of gravity of the cleaner body based on the rotation center of the moving wheel at an opposite to a connection position of the suction hose Page is arranged.

The cleaner body may include a base constructed to form a bottom of the cleaner body, and the base may include a first half portion disposed further on a front side than the rotation center of the moving wheel and configured to be inclined, whereby it is gradually spaced from the ground towards its front.

A front wheel, which is selectively in contact with the ground according to the rotation of the cleaner body, may be installed in the first half portion.

The base may include a second half portion disposed further forward than the center of rotation of the moving wheel and configured to be inclined, thereby gradually spaced from the ground toward its front side.

A rear wheel unit, which is selectively in contact with the ground according to the rotation of the cleaner body, may be installed in the second half portion.

The rear wheel unit may include: a leg rotatably installed on the base; a rear wheel installed at an extension end of the leg to be rotatable; and an elastic portion constructed to extend from a side of the rear wheel so that it is inclined or has a curvature, and is formed such that its extension end is in contact with a lower surface of the base and according to rotation of the leg is elastically deformed.

A battery unit configured to supply electric power for driving the cleaner may be provided on the cleaner body, and the battery unit may be disposed further to the rear than the rotation center of the moving wheel.

A main motor for supplying a suction force is provided on the cleaner body, and the main motor may be disposed further at a rear than the rotation center of the moving wheel.

The detection part may include a gyro sensor.

The vacuum cleaner may include an obstacle detection element provided on a front surface of the cleaner body and configured to detect an obstacle located in front of it.

The obstacle detection element may include a laser sensor.

Multiple obstacle detection elements can be arranged on the same extension line and can also be arranged such that they are directed in different directions from one another.

The cleaner body may include: a body part on which a dust container for storing sucked dust separated from air is installed; and a cover member provided on the body portion to be openable and closed and configured to selectively shield an upper surface of the dust container, and the obstacle detection member may be provided on a rounded front surface of the cover member.

A pair of motion wheels may be provided on either side of the body member, and the wheel motor assembly may be connected to each of the pair of motion wheels to independently drive the motion wheels.

The PCB can drive one of the wheel motor assemblies when the obstacle detection element detects the obstacle.

The PCB may control the wheel motor assemblies to have different speeds from each other when the obstacle detection element detects the obstacle.

The PCB may control the wheel motor assemblies to rotate in opposite directions when the obstacle detection element detects the obstacle.

A base frame for dividing an interior of the body part into a front portion and a rear portion may be installed inside the body part, and the dust container for collecting the dust may be installed on a front of the base frame.

The base frame may include: a lower frame on which is installed a battery unit constructed to supply the electric power for driving the cleaner; and an upper frame installed at an upper end of the lower frame and constructed to form a space in which the main motor for providing suction is housed.

A pair of first side walls may be provided on the upper frame, and the main motor may be disposed between the pair of first side walls so that air intake and discharge operations of the main motor are performed in forward and reverse directions.

A sub motor for supporting the suction operation may be provided on the suction part, and a sub PCB for driving the sub motor may be provided on an outer surface of the first side wall.

The main motor may be arranged to be inclined to one of the pair of first side walls, and a plate hole for discharging the air may be formed on a lower surface of the side upper frame.

A barrier hole through which the air introduced through the plate hole passes may be formed on a front surface of the lower frame, and the PCB may be installed on a front surface of the barrier hole, and a noise filter for removing noise of the supplied electric power may be installed be provided on their rear surface.

A rear opening communicating with a space of the lower frame may be formed on a rear surface of the cleaner body, and a rear cover for opening and closing the rear cover may be provided on the cleaner body.

The lower frame may be arranged to be spaced apart thereby providing a space in which the battery unit is installed, and may include a pair of second side walls for guiding an insertion and retraction operation of the battery unit, and a battery restriction groove formed through the second side wall may be formed on both side surfaces of the battery unit.

A battery restriction portion protruding to be insertable into the battery restriction groove may be formed on one of the pair of second side walls, and a battery restriction member separately shaped to be insertable into the battery restriction groove may be installed on the other thereof.

The vacuum cleaner may further include: the dust container seated in the cleaner body and constructed to collect the sucked dust, and the dust container may include a transparent housing formed in a cylindrical shape and constructed to collect the dust in the to separate and store sucked in air; a top cover constructed to form the upper surface of the dust container and having a suction port and a discharge port; and a bottom cover constructed to open and close an opened bottom surface of the dust container.

The lower cover may include: a lower cover shaft coupled to a lower end of the transparent case to be rotatable; and a lower hook attached to a position corresponding to the lower cover shaft corresponds to, is provided to be captured and restricted by a case catching portion provided at a lower end of the transparent case so that the lower cover is kept in a closed state.

A lower lock installation portion disposed on lower and upper sides of the transparent case, and a lower latch installed on the lower lock installation portion so as to be movable up and down and configured to press the lower hook when it is moved downward, thereby disengaging the coupling with the housing capture portion, may be included.

An upper surface of the hook and a lower end of the lower latch that is in contact with the upper surface of the hook may be inclined.

The vacuum cleaner may further include an inner housing formed in a cylindrical shape and provided inside the dust container, and the inner housing may include a first dust collecting space between the inner housing and the dust container and a second dust collecting space inside the inner housing for collecting the dust collect.

The vacuum cleaner may further include: a compression motor assembly provided on a side of the cleaner body in which the dust container is installed; a transmission gear provided on the bottom cover and connected to the compression motor assembly when the dust container is installed; and a dust compacting unit provided on the inner housing and coupled to the transmission gear to be rotated and thereby compact the dust in the first dust collecting space.

The transmission gear may include a first transmission gear provided on a lower surface of the lower cover and connected to the compression motor assembly, and a second transmission gear coupled to a rotation shaft of the first transmission gear and provided on an upper surface of the lower cover to be connected to the dust compaction unit, and a bearing through which the rotation shaft of the first transmission gear passes and is coupled may be provided on the lower cover.

A seal plate seated on an upper surface of the second transmission gear, an inner seal installed and attached to the seal plate to seal an opened lower surface of the inner cover, and a shaft coupling member passing through the seal plate and attached to the second transmission gear , so that the seal plate is installed to be rotated independently, can be provided.

The inner seal may include a first seal portion formed in a circular plate shape to be in contact with an opened lower end of the inner case, and a second seal portion provided above the first seal portion and in contact with an inner surface of the inner case. include.

The top cover may be separably installed on an opened top surface of the transparent case, and may have a protruding top projection and a recessed top groove each formed at an inner top end of the transparent cover and the top cover to be coupled with each other , and a top latch for restricting an end of the top cover may be provided at an upper end of the transparent case facing the top groove.

An upper lock installation portion may be formed on an outer surface of the transparent case, and the upper lock may be rotatably installed on the upper lock installation portion so as to extend higher than the upper end of the transparent case, thereby being selectively captured and restricted by the top cover becomes.

The cleaner body may include: a body part in which the dust container for separating and storing the dust in the suction air is separately installed; and a cover member installed on the body portion to be rotatable and configured to selectively shield an upper portion of the dust container.

A connector connected to the suction unit and in communication with the suction port of the dust container while the cover member is closed may be provided on the cover member.

A locking arrangement, which selectively protrudes in both lateral directions by user operation and is restricted by the body part, may be provided on the cover member.

The lock assembly may include: a pressing member pressably installed on an outer surface of a gripping portion formed on the cover member to be grasped by the user; a transmitting member that is moved up and down to transmit a printing operation of the printing member; a pair of main links in contact with the transmission member and rotated by the transmission member; and a sublink connected to the main link to reciprocate linearly and one end of which is inserted into or withdrawn from the cover member to be captured and restrained by the body part.

The main connection may include: a passage portion rotatably shaft-coupled from both sides of the transmission member; a first extension portion configured to extend from the passage portion toward the transmission member and having an inclined surface in contact with an inclined lower end of the transmission member; and a second extension portion configured to extend in a direction perpendicular to the first extension portion and to which the auxiliary connection is shaft-coupled.

A connection guide that receives the sub-connection and guides the movement of the sub-connection may be formed on the cover member, and an entrance through which one end of the sub-connection is inserted and withdrawn may be opened on a side surface of the cross member corresponding to the connection guide.

A connection assembly that connects the cover member to the body part to enable the cover member to be maintained in an open state may be provided between the cover member and the body part.

A cover member coupling portion extending to be rotatable together with the body part may be formed at one end of the cover member, and one end of the connecting assembly may be rotatably installed on the cover member coupling portion and its other end may be slidably installed on the body part .

The connection assembly may include: a rotary connection, one end of which is rotatably installed on the cover member; a slider rotatably installed at the other end of the rotary joint and received on one side of the body member for linearly reciprocating when the cover member is opened and closed; and an elastic member provided between the cover member and the slider to elastically hold the slider.

A connection assembly receiving portion that is opened in a rotating shaft direction of the cover member and accommodates at least a part of the slider, and a rotating joint may be formed on the body part.

A slider guide, which is in contact with both side surfaces of the slider to guide a linear reciprocating movement of the slider, may be formed on the connection assembly receiving portion.

A pair of holding portions spaced apart from each other may be formed on the rotary joint, and the pair of holding projections may include slider fixing portions constructed to protrude in mutually facing directions to be rotatably coupled to the slider; a holding projection configured to project outwardly to be captured and restricted by an engaging projection projecting from the connector assembly receiving portion; and a holding slot cut from an end of the holding projection to a space between the slider fixing portion and the holding projection, which is configured to impart elasticity to the holding projection.

The engaging projection may be formed at a position that engages with the holding projection while the cover member is opened at a target angle, may hold the holding projection, and thus may restrict rotation of the cover member.

A holder through which a projection formed on one side of the suction unit is captured and restricted and the suction unit is held may be provided on the cleaner body, and the holder may be formed of a metallic material and then may be coupled to the cleaner body.

And the vacuum cleaner according to the embodiment of the present invention may include: a cleaner body; a pair of moving wheels provided on both side surfaces of the cleaner body and constructed to rotatably hold the cleaner body and also to be rotated for driving; a wheel motor assembly provided on the cleaner body and constructed to drive the movement to turn veins; a detection part provided inside the cleaner body and configured to detect an inclination of the cleaner body; a PCB configured to drive the wheel motor assembly according to the inclination of the cleaner body detected by the detecting part; and a rear wheel unit provided on a lower surface of the cleaner body and configured to elastically hold the cleaner body on a rear side of the pair of moving wheels.

The cleaner body may include: a center portion constructed to form a lower surface of the cleaner body; a first half portion constructed to extend upwardly inclined from a front end of the center portion; and a second half portion constructed to extend upwardly inclined from a rear end of the center portion, and the rear wheel unit may be provided in the center portion.

The cleaner body can be rotated such that an angle between the center portion and the floor is smaller when the vacuum cleaner is traveling than when the vacuum cleaner is stopped while traveling.

The rear wheel unit may be further provided on a rear side as a rotation center of the moving wheel.

The wheel motor assembly may be driven such that the center portion is maintained in a parallel state with the floor while the vacuum cleaner is traveling.

The cleaner body can be rotated so that its lower surface is arranged to be inclined with respect to the floor when the vacuum cleaner is stopped while driving.

A main motor disposed further on a rear side than a rotating shaft of the moving wheels and driven to suck dust, and a battery that provides electric power for driving the main motor, and the wheel motor assembly may be provided in the cleaner body, and the battery may be be arranged further on a back than the rotating shaft of the movement wheels.

The detection part may include a gyro sensor.

The rear wheel unit may be arranged at a center between the moving wheels.

The rear wheel unit may be compressed by the cleaner body when the vacuum cleaner is stopped while driving.

The cleaner body can be rotated in a normal direction when the vacuum cleaner is running and can be rotated in a reverse direction when the vacuum cleaner is stopped so that the rear wheel unit is in contact with the floor.

A wheel receiving portion formed to be recessed and receiving the rear wheel unit may be formed on the lower surface of the cleaner body.

A shaft installation portion to which an upper end of the rear wheel unit is shaft-coupled and rotatably installed thereon may be formed inside the wheel receiving portion.

An elastic member may be provided between the wheel receiving portion and the rear wheel unit, and the rear wheel unit may be elastically held to the cleaner body by the elastic member.

The rear wheel unit may have a wheel bracket rotatably installed on the lower surface of the cleaner body; and a rear wheel rotatably installed at an extension end of the wheel mount and rotated while in contact with the ground.

An elastic portion, which is pressed by the lower surface of the cleaner body upon rotation of the cleaner body and is thus elastically deformed, may be formed on the wheel holder.

The wheel mount may include: a pair of legs, and may also include a leg projection constructed to protrude from an upper end of each of the legs and shaft-coupled to the lower surface of the cleaner body; and a wheel receiving portion constructed to form a space for receiving the rear wheel by connecting lower ends of the legs.

Industrial applicability

According to the embodiments, user-friendliness can be improved, thus the present invention has high industrial applicability.

Claims (13)

Vacuum cleaner, which has: a cleaner body (10), the focus of which is a position further back than its center of rotation; a pair of moving wheels (60) provided on both side surfaces of the cleaner body (10) and constructed to rotatably hold the cleaner body (10) and also to be rotated for driving; and a rear wheel unit (2170) provided on a lower surface of the cleaner body (10) and configured to elastically hold the cleaner body (10) at a position further back than the pair of moving wheels (60), the rear wheel unit ( 2170) includes: a holding part (2171) rotatably installed on the lower surface of the cleaner body (10) and rotated in a rotation direction of the cleaner body (10); an elastic portion (2713) constructed to extend from one side of the holding part (2171) and to be elastically deformed by being in contact with the lower surface of the cleaner body (10) when the holding part (2171) is rotated; a rotating member (2173) shaft-coupled to the holding part (2171) and installed so as to be rotatable about a rotation axis perpendicular to a rotation axis of the holding part (2171); a rear wheel (2174) installed on the rotating member (2173) and rolling while in contact with the ground; Installation projections (2711) formed on both side surfaces of one end of the holding member (2171) and rotatably coupled to the cleaner body (10), a base recess portion (311b) formed to be recessed and the rear wheel unit (2170 ) is formed on a lower surface of the cleaner body (10), and a wheel installation portion (311c) in which the installation projection (2711) of the rear wheel unit (2170) is shaft-coupled and installed so as to be rotatable, inside the base recess portion (31 1b), wherein an opening portion (2712) opened between a pair of the installation projections (2711) is formed on the holding part (2171), and the elastic portion (2713) is formed from one end of the opening portion (2712) is opened toward the lower surface of the cleaner body (10), wherein the elastic portion (2713) is formed in a plate shape and can extend so that it is elastically deformed when it comes into contact with a lower surface of the cleaner body (10). is. Vacuum cleaner after Claim 1 , wherein the cleaner body (10) comprises: a middle portion (311) forming a lower surface of the cleaner body (10); a first half portion (312) inclined and extending upward from a front end of the center portion (311); and a second half portion (313) inclined and extending upward from a rear end of the center portion (311), and wherein the rear wheel unit (2170) is provided in the center portion (311). Vacuum cleaner after Claim 1 , wherein the rear wheel unit (2170) is arranged at a center between the moving wheels (60). Vacuum cleaner after Claim 1 , wherein the elastic portion (2713) is curved toward the lower surface of the cleaner body (10) and is elastically deformed by a compressive force caused by rotation of the cleaner body (10) when the vacuum cleaner is stopped during driving. Vacuum cleaner after Claim 1 , wherein a plurality of reinforcing ribs (2713a) formed in a direction intersecting with the elastic portion (2713) are formed at one end of the elastic portion (2713) connected to the opening portion (2712). Vacuum cleaner after Claim 1 , wherein a rotary installation portion (2714) formed in a shape corresponding to that of the rotary member (2173) and accommodating the rotary member (2173) is formed on the holding part (2171), and a rotary hole (2715) through which a rotation shaft (2175) as a rotation axis of the rotation member (2173) is formed at a center of the rotation installation portion (2714). Vacuum cleaner after Claim 6 , wherein an upper surface of the rotating member (2173) is opened, and a shaft hub (2731) to which the rotating shaft (2175) is shaft-coupled is formed at a center of the opened upper surface. Vacuum cleaner after Claim 7 , wherein a plurality of rotary member reinforcing ribs extending from the shaft hub (2731) to a circumference of the rotary member (2173) and arranged radially are formed on the opened upper surface of the rotary member (2173). Vacuum cleaner after Claim 7 , further comprising a wheel receiving portion (2733) recessed from an outer surface of the rotating member (2173) toward the rotating shaft (2175) and configured to receive the rear wheel (70). Vacuum cleaner after Claim 1 , further comprising: a wheel motor assembly provided on the cleaner body (10) and configured to rotate the moving wheels (60); a detection part (306) provided inside the cleaner body (10) and configured to detect an inclination of the cleaner body (10); and a printed circuit board (PCB) configured to drive the wheel motor assembly according to the inclination detected by the detecting part (306), wherein the cleaner body (10) is rotated so that its second half portion (313) comes closer to the ground when the vacuum cleaner is stopped as if the vacuum cleaner is moving. Vacuum cleaner after Claim 10 , wherein the cleaner body (10) is rotated in a normal direction when the vacuum cleaner is running and is rotated in a reverse direction when the vacuum cleaner is stopped so that the rear wheel unit is in contact with the floor. Vacuum cleaner after Claim 10 , wherein the wheel motor assembly is driven such that the lower surface of the cleaner body (10) is maintained in a parallel state to the floor when the vacuum cleaner is traveling. Vacuum cleaner after Claim 2 , wherein the cleaner body (10) is rotated such that an inclination angle between the center portion (311) and the floor when the vacuum cleaner is running is smaller than the inclination angle when the vacuum cleaner is stopped.

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