Vacuum Cleaner

Abstract

A vacuum cleaner is disclosed. The vacuum cleaner includes a suction nozzle comprising a rotating cleaner positioned in front of the suction port, a vacuum cleaner body equipped with a first motor that generates suction force, and a distance sensing sensor coupled to the suction nozzle. The distance sensing sensor detects the distance to a wall surface located in front of the suction nozzle, and if this distance (distance value) is less than or equal to a reference value, the rotational speed of the first motor is increased. Accordingly, when the suction nozzle touches the wall surface and cannot move forward, the suction force is instantaneously increased so that foreign substances such as dust can be effectively sucked up from the corners of the wall, and the battery can be used effectively.

Description

Technology Field

[0001] The present invention relates to a vacuum cleaner comprising a suction nozzle equipped with a suction port and a vacuum cleaner body that generates suction force at the suction port. Background Technology

[0002] A vacuum cleaner is a device designed to draw dust and other debris into the interior through a difference in air pressure.

[0003] A vacuum cleaner may comprise a vacuum cleaner body and a suction nozzle. A motor is provided inside the vacuum cleaner body, and this motor can generate suction force as it rotates. The suction force generated inside the vacuum cleaner body is transmitted to the suction nozzle, and external dust and other debris can be sucked into the vacuum cleaner through the suction nozzle.

[0004] Vacuum cleaners can be classified into canister type, upright type, hand / stick type, etc., depending on their shape.

[0005] In a canister-type vacuum cleaner, a wheeled vacuum cleaner body is provided separately from the suction nozzle, and the vacuum cleaner body and the suction nozzle are connected through a hose.

[0006] An upright type vacuum cleaner consists of a vacuum cleaner body and a suction nozzle combined with a mop handle.

[0007] Handheld and stick-type vacuum cleaners are equipped with a handle on the main body so that the user can hold and use the main body. In handheld vacuum cleaners, the main body and the suction nozzle are located relatively close together, while in stick-type vacuum cleaners, the suction nozzle is located relatively far away from the main body.

[0008] In addition, vacuum cleaners include robotic vacuums, which are designed to move autonomously and suck up dust and other debris using various sensors.

[0009] A means for wiping or sweeping the floor can be combined with the suction nozzle of the vacuum cleaner.

[0010] In relation to such vacuum cleaners, Korean Registered Patent No. 1248733 (hereinafter referred to as 'Prior Art 1') discloses a vacuum cleaner including a suction nozzle. A rotating agitator is coupled to the suction nozzle of Prior Art 1, and a brush is coupled to the outer surface of the agitator. When the agitator rotates, the brush shakes off foreign matter from the floor surface, and the foreign matter is drawn into the suction port of the suction nozzle.

[0011] As another prior art, Korean Registered Patent No. 1903238 (hereinafter, 'Prior Art 2') discloses a vacuum cleaner having a rotating cleaning unit. The outer surface of the rotating cleaning unit of Prior Art 2 may be made of a fabric such as felt or felt, and foreign substances such as dust accumulated on the floor surface during the rotation of the rotating cleaning unit can be effectively removed by being caught on the outer surface of the rotating cleaning unit.

[0012] As such, when a vacuum cleaner is equipped with means such as the agitator of prior art 1 or the rotary cleaner of prior art 2, foreign matter on the floor surface can be effectively removed when the suction nozzle moves.

[0013] However, if the suction nozzle touches the wall and cannot advance, the agitator of prior art 1 or the rotating cleaner of prior art 2 cannot come into direct contact with foreign matter at the corner of the wall, so cleaning may not be performed effectively.

[0014] Specifically, in the case of prior art 2, the bottom of the rotating cleaner comes into contact with the floor surface. At this time, since the rotating cleaner is positioned between the space at the corner of the wall (the space in front of the rotating cleaner) and the space behind the rotating cleaner, foreign matter at the corner of the wall may not be properly sucked into the suction port.

[0015] In the case of Prior Art 1, brushes are formed only on a part of the outer surface of the agitator, so the front space of the agitator and the rear space of the agitator are connected to each other, but since the suction force is not concentrated, it may take a considerable amount of time to suck up all foreign substances. Prior art literature

[0016] Korean Registered Patent KR 10-1248733 B1 (Registration Date: 2013.03.22.) Korean Registered Patent KR 10-1903238 B1 (Registration Date: 2018.09.20.) The problem to be solved

[0017] The present disclosure describes a vacuum cleaner having a path such that, when a suction nozzle including a rotating cleaner rotating in front of a suction port comes into contact with a wall and cannot advance forward, the suction force generated at the suction port is concentrated and transmitted to a specific point in the space in front of the rotating cleaner.

[0018] The present disclosure describes a vacuum cleaner having a path through which a suction force formed at a suction port during rotation of a rotary cleaner can be transmitted to the front space of the rotary cleaner without interruption.

[0019] The present disclosure describes a vacuum cleaner in which the direction in which suction force acts can be changed in a path where foreign matter can move when the rotary cleaner rotates.

[0020] The present disclosure describes a vacuum cleaner capable of effectively detecting a wall surface and controlling the suction force accordingly.

[0021] The present disclosure describes a vacuum cleaner capable of increasing the suction force at the suction opening of the suction nozzle before the suction nozzle touches a front wall. means of solving the problem

[0022] According to one aspect of the subject matter described in this application, a vacuum cleaner comprises a vacuum cleaner body and a suction nozzle connected to the vacuum cleaner body. The vacuum cleaner body and the suction nozzle may be connected through a connecting pipe.

[0023] The above suction nozzle comprises a nozzle head and a rotary cleaner.

[0024] A suction port is provided on the bottom surface of the nozzle head portion.

[0025] The above-mentioned rotary cleaner is rotatably coupled to the nozzle head portion with respect to a first rotation axis parallel to the left-right direction. The above-mentioned rotary cleaner is located in front of the suction port.

[0026] The above vacuum cleaner body is equipped with a first motor. The first motor rotates inside the vacuum cleaner body so as to generate a suction force at the suction port.

[0027] According to one aspect of the subject matter described in this application, the rotary cleaner comprises a core, a fluffy, and a first fluid path.

[0028] The above core is formed in a cylindrical shape with the first rotation axis as the central axis.

[0029] The above fluffy comprises one or more of a brush and a textile. The above fluffy is formed to be bonded to the outer circumference of the core and to come into contact with the bottom surface.

[0030] The first Euro above crosses the fluffy and is formed along the first axis of rotation and an inclined direction, and is formed in the shape of a concave groove.

[0031] The outer surface of the above-mentioned rotary cleaner is covered by the above-mentioned fluff, except for the above-mentioned first fluid path.

[0032] In the above rotary cleaner, the first path is formed as a single line.

[0033] The above first Euro includes a first boundary surface and a second boundary surface.

[0034] The first boundary surface forms the boundary between the first Euro and the Fluffy. The first boundary surface is formed in a spiral shape.

[0035] The second boundary surface forms the boundary between the first Euro and the Fluffy on the opposite side of the first boundary surface. The second boundary surface is formed in a spiral shape.

[0036] The second boundary surface is located behind the first boundary surface based on the rotational direction of the rotary cleaner.

[0037] In the cross-section of the above-mentioned rotary cleaner, the first boundary surface and the second boundary surface are formed perpendicular to the outer surface of the core.

[0038] In some implementations, the gap between the inner end of the first boundary surface and the inner end of the second boundary surface is greater than 3 times the height of the first boundary surface and less than 4 times.

[0039] In some implementations, the core has an outer diameter of 35 to 40 mm and a length of 210 to 230 mm.

[0040] In some implementations, the first Euro has a width of 15 to 25 mm and a depth of 3 to 7 mm.

[0041] The first above-mentioned Euro is formed in a spiral shape, and has a constant width and depth along the longitudinal direction.

[0042] In some implementations, the angle between the first normal plane that meets the front end of the first boundary plane among the normal planes of the outer surface of the rotary cleaner and the second normal plane that meets the rear end of the second boundary plane among the normal planes of the outer surface of the rotary cleaner may be 0 to 45°.

[0043] The first boundary surface includes a first front end forming a front end and a first rear end forming a rear end, based on the rotational direction of the rotary cleaner.

[0044] The second boundary surface includes a second front end forming a front end and a second rear end forming a rear end, based on the rotational direction of the rotary cleaner.

[0045] In some implementations, the reference line connecting the first front end and the second rear end is formed parallel to the first axis of rotation.

[0046] The nozzle head portion includes a first guide channel and a second guide channel.

[0047] The first induction path forms a space extending along a direction parallel to the first rotation axis from the intake port.

[0048] The second induction channel forms a space extending from the intake port in the opposite direction of the first induction channel.

[0049] In some implementations, the rear portion of the rotary cleaner is exposed toward the suction port, the first induction channel, and the second induction channel in an area lower than the first rotation axis.

[0050] The nozzle head portion comprises an upper housing, a lower housing, a first side wall, a second side wall, and an inner wall.

[0051] The upper housing includes an upper cover formed along a direction parallel to the first rotation axis and covering the upper side of the rotation cleaner.

[0052] The lower housing is located below the upper housing, and the suction port is formed at the center front in the left-right direction.

[0053] The first side wall shields one side of the rotary cleaner and is coupled to the upper housing and the lower housing.

[0054] The second side wall shields the side of the rotary cleaner on the opposite side of the first side wall and is coupled to the upper housing and the lower housing.

[0055] The inner wall is formed along a direction parallel to the first rotation axis and contacts the rotating cleaner from behind. The upper end of the inner wall is connected to the bottom surface of the upper housing, and the lower corner is formed higher than the rotating cleaner.

[0056] The lower end of the inner wall may be lower than the first rotation axis.

[0057] The front edge of the upper cover may be located further forward than the rotary cleaner and may be formed parallel to the first rotation axis.

[0058] The first side wall and the second side wall are formed with a lower front corner that is inclined or in the shape of an inclined curve.

[0059] In some embodiments, a second flow path stepped inwardly is formed at the bottom of the outer surface of the first side wall, and a third flow path stepped inwardly is formed at the bottom of the outer surface of the second side wall.

[0060] In some embodiments, the rotary cleaner comprises: the core; and an outer surface layer coupled to the outer surface of the core.

[0061] The above outer surface layer comprises a fluffy region forming the fluffy; and a first flow path region forming the first flow path.

[0062] When the outer surface layer is spread flat, the fluffy region forms a parallelogram, and the first flow path region is formed along one side of the fluffy region.

[0063] According to one aspect of the subject matter described in the present application, the vacuum cleaner comprises a distance sensing sensor.

[0064] The distance sensing sensor is coupled to the suction nozzle and configured to detect the distance to a wall surface located in front of the suction nozzle.

[0065] In some implementations, the rotational speed of the first motor is configured to increase when the distance value detected by the distance sensing sensor is less than or equal to a reference value.

[0066] The distance sensing sensor described above is composed of an optical sensor and can be located on the upper side of the center of the left-right direction of the suction nozzle.

[0067] The above suction nozzle is further formed to include a connecting neck and a nozzle neck portion.

[0068] The above connecting neck is formed in the shape of a tube and is connected to the above cleaning body.

[0069] The nozzle neck portion is formed in the shape of a tube and extends rearward from the nozzle head portion. The nozzle neck portion is rotatably coupled to the connecting neck around a second rotation axis.

[0070] The distance sensing sensor can be coupled to the upper side of the nozzle neck at a point higher than the top of the nozzle head.

[0071] In some implementations, the distance from the front end of the suction nozzle to the distance sensing sensor may be 50 to 70 mm, and the reference value may be 120 to 140 mm.

[0072] According to one aspect of the subject matter described in the present application, the vacuum cleaner comprises a second motor.

[0073] The second motor is coupled to the suction nozzle to rotate the rotary cleaner.

[0074] In some implementations, the rotational speed of the second motor may be configured to increase when the distance value detected by the distance sensing sensor is less than or equal to a reference value. Effects of the invention

[0075] In some embodiments, a first channel is formed in the shape of a concave groove on the outer surface of the rotary cleaner, and the first channel is formed along a first rotation axis and an inclined direction across the fluffy. The outer surface of the rotary cleaner is covered by the fluffy except for the first channel, and the first channel in the rotary cleaner is formed as a single line. When the rotary cleaner rotates, the front space of the rotary cleaner communicates with the suction port through the first channel, and the suction force of the suction port can be concentratedly transmitted to a specific point in the front space of the rotary cleaner through the first channel, and the suction of foreign matter can be effectively achieved even when the suction nozzle is located at a corner of the wall.

[0076] In some embodiments, the first flow path includes a first boundary surface and a second boundary surface, and a reference line connecting the first front end of the first boundary surface and the second rear end of the second boundary surface is parallel to the first rotation axis of the rotary cleaner. Accordingly, the suction force generated at the suction port during the rotation of the rotary cleaner can be transmitted to the front space of the rotary cleaner without interruption.

[0077] In some implementations, a distance sensing sensor is formed in the suction nozzle, and the rotational speed of the first motor of the vacuum cleaner body is configured to increase when the distance value detected by the distance sensing sensor is less than or equal to a reference value. Accordingly, a vacuum cleaner can be provided that instantaneously increases the suction power upon detection of a wall surface, thereby enabling rapid suction of foreign matter from the corners of the wall and efficient use of the battery.

[0078] In some implementations, the distance sensing sensor may be an optical sensor. The distance from the front of the suction nozzle to the distance sensing sensor is shorter than a reference value, wherein the reference value is determined by considering the normal movement speed of the vacuum cleaner's suction nozzle and the time it takes for a change in suction power to be transmitted from the vacuum cleaner body to the suction nozzle. Accordingly, the suction power at the suction nozzle can be increased just before the suction nozzle touches the front wall, allowing for efficient cleaning while minimizing energy consumption (battery capacity). Brief explanation of the drawing

[0079] FIG. 1 is a perspective view illustrating a vacuum cleaner according to one embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating the main body of a vacuum cleaner. FIG. 2 schematically illustrates the locations of the components provided in the main body of the vacuum cleaner. Figure 3 is a diagram illustrating the usage state of a vacuum cleaner. FIG. 4a is a perspective view illustrating a suction nozzle according to one embodiment of the present invention. Fig. 4b is a side view illustrating the suction nozzle of Fig. 4a. Fig. 5 is an exploded perspective view illustrating the suction nozzle of Fig. 4a. FIG. 6 is a schematic cross-sectional view of the suction nozzle at A-A' in FIG. 4a. FIG. 6 schematically shows the direction of movement of air entering the suction port. Figure 7 is a front view of the suction nozzle. Figure 8 is a drawing of the suction nozzle viewed from below. Figure 9 is a drawing illustrating a rotary cleaner. Figure 10a is a drawing showing the core of a rotary cleaner. Figures 10b and 10c, respectively, are drawings illustrating the unfolded outer surface layer forming a rotary cleaner. FIG. 10d is a cross-section of the outer surface layer of FIG. 10c. FIG. 11a is a cross-section along B-B' in FIG. 9, FIG. 11b is a cross-section along C-C' in FIG. 9, and FIG. 11c is a cross-section along D-D' in FIG. 9. FIG. 13a is a drawing illustrating a rotary cleaner according to one embodiment, and FIG. 13b is a side view illustrating the rotary cleaner of FIG. 13a. Figures 12 (a), (b), (c), (d), (e), (f), (g), and (h) are schematic drawings illustrating the rotation of a rotating cleaner while in contact with the bottom surface and the front wall surface. Figures 14 (a), (b), (c), and (d) are each drawings of the suction nozzle in contact with the front wall viewed from below, schematically showing the direction and path of air movement. Figures 15 (a), (b), (c) and (d) are drawings of the suction nozzles in contact with the front wall and the left wall, respectively, viewed from below, and schematically show the direction and path of air movement. Figures 16 (a), (b), (c), and (d) are drawings of the suction nozzles in contact with the front wall and right wall, respectively, viewed from below, and schematically show the direction and path of air movement. FIG. 17 is a side view of the suction nozzle, schematically illustrating the front wall surface being detected by a distance sensor. FIGS. 18a, FIGS. 18b, and FIGS. 18c are drawings of the suction nozzle viewed from above, each schematically illustrating the front wall surface being detected by a distance sensor. Specific details for implementing the invention

[0080] Hereinafter, in order to explain the present invention more specifically, embodiments according to the present invention will be described in more detail with reference to the accompanying drawings. Throughout the detailed description, the same reference numerals indicate the same components.

[0081] FIG. 1 is a perspective view illustrating a vacuum cleaner (1) according to one embodiment of the present invention.

[0082] FIG. 2 is a cross-sectional view illustrating a vacuum cleaner body (30). FIG. 2 schematically illustrates the locations of the components provided in the vacuum cleaner body (30).

[0083] The vacuum cleaner (1) is configured to suck up external air and / or foreign substances such as dust, hair, etc.

[0084] In one embodiment, the vacuum cleaner (1) comprises a vacuum cleaner body (30) and a suction nozzle (10). The vacuum cleaner (1) may further comprise a connecting pipe (20), and the vacuum cleaner body (30) and the suction nozzle (10) may be connected through the connecting pipe (20).

[0085] The suction nozzle (10) is equipped with a suction port (101), which is a hole (inlet) into which external air and foreign matter are introduced (see FIG. 6). External air and foreign matter are first introduced through the suction port (101) of the suction nozzle (10), and then move to the vacuum cleaner body (30) via the connecting pipe (20).

[0086] A detailed description of the suction nozzle (10) will be given later.

[0087] The vacuum cleaner body (30) is configured to generate suction power.

[0088] To this end, the vacuum cleaner body (30) includes a first motor. The first motor (31) rotates inside the vacuum cleaner body (30) so that a suction force is formed at the suction port (101).

[0089] In one embodiment, the motors described in the embodiment of the present invention, including the first motor (31), may be made of a BLDC motor or a stepper motor, etc.

[0090] A fan is connected to the rotation shaft (31a) of the first motor (31) of the vacuum cleaner body (30), and accordingly, air flow is generated when the first motor (31) rotates.

[0091] As the first motor (31) and the fan coupled to the first motor (31) rotate around the rotation axis (31a) inside the vacuum cleaner body (30), a pressure difference can be generated between the inside and outside of the vacuum cleaner body (30), and accordingly, suction force can be generated in the vacuum cleaner body (30).

[0092] The connecting pipe (20) connects the vacuum cleaner body (30) and the suction nozzle (10). The connecting pipe (20) is formed in the shape of a pipe or tube and forms a passage through which external air introduced through the suction port (101) moves toward the vacuum cleaner body (30).

[0093] The connecting pipe (20) may be made of a relatively rigid material so as not to be unintentionally bent or deformed. The connecting pipe (20) may be made of plastic or metal, or may include these.

[0094] The connecting pipe (20) is formed by including a first connecting part (21) and a second connecting part (22).

[0095] The first connecting part (21) can form the inlet of the connecting pipe (20) through which external air flows into the connecting pipe (20), and the second connecting part (22) can form the outlet of the connecting pipe (20) through which air inside the connecting pipe (20) exits toward the main body (30).

[0096] The first connecting part (21) and the second connecting part (22) can form both ends of the connecting pipe (20).

[0097] In one embodiment, the vacuum cleaner body (30) can be fixedly coupled to the second connecting part (22) of the connecting pipe (20). That is, the vacuum cleaner body (30) and the connecting pipe (20) can be formed so that they are fixed to each other without moving separately. In this case, the vacuum cleaner (1) can be formed in the form of a 'stick-type vacuum cleaner'.

[0098] In another embodiment, the vacuum cleaner body (30) may be connected to the second connecting part (22) of the connecting pipe (20) via a separate means. For example, a separate hose that can be flexibly bent may be connected between the connecting pipe (20) and the vacuum cleaner body (30). That is, the vacuum cleaner (1) may be configured so that the vacuum cleaner body (30) and the connecting pipe (20) can move independently. In this case, the vacuum cleaner (1) may be formed in the form of a 'canister-type vacuum cleaner'.

[0099] In the following description, the vacuum cleaner body (30) is fixed to the second connecting part (22) of the connecting pipe (20) and the suction nozzle (10) is fixed to the first connecting part of the connecting pipe (20), as shown in FIG. 1.

[0100] In one embodiment, the vacuum cleaner body (30) may comprise a handle (32), a dust bin (33), a main body suction port (34), and a battery (35). The vacuum cleaner body (30) may be equipped with a control unit (38).

[0101] A handle (32) is formed on one side of the vacuum cleaner body (30). The handle (32) is shaped so that a user can stably grip it with their hand. The handle (32) may be formed on the side facing the main body suction port (34) (the side opposite the main body suction port (34)). If the main body suction port (34) is formed on the front of the vacuum cleaner body (30), the handle (32) may be formed on the rear of the vacuum cleaner body (30).

[0102] In the main body (30) of the vacuum cleaner, an operating button (36) for operating the vacuum cleaner (1) may be provided at a position adjacent to the handle (32).

[0103] The dust bin (33) is a container designed to collect foreign substances, such as dust, separated from the air inside the vacuum cleaner body (30). Here, foreign substances, such as dust, that have entered the vacuum cleaner body (30) can be separated from the air by a cyclone method. Then, the air separated from the dust, etc. inside the vacuum cleaner body (30) can be discharged to the outside of the vacuum cleaner body (30) through a separate outlet (37).

[0104] The dust bin (33) can be detachably connected to the vacuum cleaner body (30). The dust bin (33) can be made transparent so that the dust collected inside can be visually checked from the outside.

[0105] The battery (35) is configured to supply power to each component forming the vacuum cleaner (1). The battery (35) can supply power to the first motor (31) of the vacuum cleaner body (30) and can also supply power to the second motor (470) of the suction nozzle (10).

[0106] The main body suction port (34) forms the inlet of the main body (30) through which air, dust, etc. flow into the main body (30). The main body suction port (34) may be formed in a shape that protrudes outward from the main body (30).

[0107] The second connecting part (22) of the connecting pipe (20) can be fixedly connected to the main body suction port (34).

[0108] The control unit (38) is configured to control the operation of the vacuum cleaner (1) and to control the operation of each component of the vacuum cleaner (1). This control unit (38) may include a Central Processing Unit. For control by the control unit (38), the vacuum cleaner (1) may be provided with a storage medium in which an application program is stored, and the control unit (38) may be configured to control the vacuum cleaner (1) by running the application program according to information input to the vacuum cleaner (1), information output from the vacuum cleaner (1), information obtained from the vacuum cleaner (1), etc.

[0109] Figure 3 is a drawing showing the usage state of the vacuum cleaner (1).

[0110] FIG. 4a is a perspective view illustrating a suction nozzle (10) according to one embodiment of the present invention.

[0111] FIG. 4b is a side view showing the suction nozzle (10) of FIG. 4a from the opposite side.

[0112] FIG. 5 is an exploded perspective view showing the suction nozzle (10) of FIG. 4a.

[0113] FIG. 6 is a cross-sectional view schematically illustrating the suction nozzle (10) of FIG. 4a.

[0114] The first direction (X), the second direction (Y), and the third direction (Z), which are the directions described in the embodiment of the present invention, are each orthogonal directions to one another. The first direction (X) may be the front direction of the vacuum cleaner (1), the second direction (Y) may be the left direction of the vacuum cleaner (1), and the third direction (Z) may be the upper direction of the vacuum cleaner (1). The first direction (X) and the second direction (Y) may be directions parallel to the bottom surface (B), and the third direction (Z) may be a direction perpendicular to the bottom surface (B).

[0115] In the embodiments of the present invention, the front-rear direction may be a direction parallel to the first direction (X), the left-right direction may be a direction parallel to the second direction (Y), and the up-down direction may be a direction parallel to the third direction (Z).

[0116] The user (U) can use the vacuum cleaner (1) while holding the vacuum cleaner body (30), at which time the connecting pipe (20) is positioned at an angle toward the lower front side of the user (U), and the suction nozzle (10) can be positioned on the floor surface (B) in front of the user (U). In this state, the use of the vacuum cleaner (1) can be a natural state of use of the vacuum cleaner (1).

[0117] In one embodiment, the suction nozzle (10) may be structured to be suitable for sucking up dust, etc. while placed on the front floor surface (B) of the user (U). To this end, the suction nozzle (10) may be structured so that the front and rear directions are distinguished from each other, and the upper and lower directions are also distinguished from each other.

[0118] Assuming that the suction nozzle (10) is placed on a flat bottom surface (B) along the horizontal direction, the front direction (first direction (X)) and left direction (second direction (Y)) of the suction nozzle (10) may each be directions parallel to the horizontal direction, and the upper direction (third direction (Z)) of the suction nozzle (10) may be a direction parallel to the vertical direction.

[0119] The suction nozzle (10) can be formed in a left-right symmetrical shape.

[0120] As described above, the suction nozzle (10) is formed by including a suction port (101).

[0121] The suction port (101) may be the first inlet through which dust, etc. enters the vacuum cleaner (1), and the suction nozzle (10) may be formed in various structures within the scope of having such a suction port (101).

[0122] In one embodiment, the suction nozzle (10) may comprise a nozzle housing (11) and a connecting neck (300).

[0123] In addition, the suction nozzle (10) is formed to include a rotary cleaner (400).

[0124] The nozzle housing (11) may be placed on the floor and configured to move along the floor surface (B). At this time, the suction port (101) may be formed on the bottom surface of the nozzle housing (11).

[0125] In order to facilitate the smooth movement of the nozzle housing (11) placed on the floor surface, a plurality of wheels (casters (180)) may be formed on the bottom surface of the nozzle housing (11).

[0126] The nozzle housing (11) may be formed to include a nozzle head portion (100) and a nozzle neck portion (200). The nozzle head portion (100) may form the front part of the nozzle housing (11), and the nozzle neck portion (200) may form the rear part of the nozzle head portion (100).

[0127] The suction port (101) can be formed on the bottom surface of the nozzle head part (100).

[0128] The nozzle neck portion (200) is formed in the shape of a tube and extends from the rear of the nozzle head portion (100) in a rearward direction. In the nozzle housing (11), the nozzle neck portion (200) is a part that is coupled with the connecting neck (300), and the nozzle neck portion (200) can be rotatably coupled with the connecting neck (300).

[0129] A rotary cleaner (400) is provided in the suction nozzle (10). The rotary cleaner (400) is generally formed in the shape of a roller and is rotatably coupled to the nozzle housing (11) (nozzle head part (100)) with respect to its central axis (first rotation axis (R1)). The rotary cleaner (400) can be coupled to the bottom surface of the nozzle housing (11) (nozzle head part (100)) in front of the suction port (101). (See FIG. 1, etc.)

[0130] A motor (second motor (470)) may be provided inside the suction nozzle (10) to rotate the rotary cleaner (400).

[0131] Fluffy (420), including a brush and / or cloth, is formed on the outer surface of the rotary cleaner (400). The fluffy (420) of the rotary cleaner (400) can be positioned to be in contact with the floor surface (B) or very close to the floor surface (B), and as the rotary cleaner (400) rotates, it can sweep or adsorb dust and other debris from the floor toward the suction port (101).

[0132] A first channel (430) in the shape of a concave groove is formed on the outer surface of the rotary cleaner (400). The first channel (430) forms a passage through which air and / or foreign matter travels. In particular, the first channel (430) forms a passage through which foreign matter located on the front bottom surface (B) of the rotary cleaner (400) travels to the suction port (101) located at the rear of the rotary cleaner (400).

[0133] The connecting neck (300) is a part that is connected to the connecting pipe (20) at the suction nozzle (10). The connecting neck (300) is detachably connected to the first connecting part (21). The connecting neck (300) may be formed in the shape of a tube, and its interior is in communication with the suction port (101) and also in communication with the interior of the connecting pipe (20).

[0134] The connecting neck (300) may be provided with a button (310) for separating it from the connecting pipe (20) connected thereto.

[0135] Dust and other particles introduced from the suction nozzle (10) into the suction port (101) can move toward the connecting pipe (20) through the inside of the nozzle neck portion (200) and the inside of the connecting neck (300). A separate corrugated pipe (170) may be inserted into the nozzle housing (11) (particularly, the nozzle neck portion (200)) and the inside of the connecting neck (300). When such a corrugated pipe (170) is provided, dust introduced into the suction port (101) moves toward the connecting pipe (20) through the inside of the corrugated pipe (170).

[0136] The connecting neck (300) forms the rear part of the suction nozzle (10) and can be formed at the rear of the nozzle housing (11).

[0137] As described above, the nozzle housing (11) (nozzle neck portion (200)) and the connecting neck (300) are rotatably coupled to each other. The nozzle housing (11) (nozzle neck portion (200)) and the connecting neck (300) are rotatably coupled to each other with respect to a second rotation axis (R2). The second rotation axis (R2) can be formed parallel to the bottom surface (B).

[0138] Figure 7 is a front view of the suction nozzle (10).

[0139] FIG. 8 is a drawing of the suction nozzle (10) viewed from below.

[0140] The nozzle head portion (100) comprises an upper housing (110), a lower housing (120), a first side wall (130), a second side wall (140), and an inner wall (150).

[0141] The nozzle head part (100) can be formed in a left-right symmetrical shape.

[0142] The upper housing (110) includes an upper cover (111).

[0143] The upper cover (111) is formed long along the second direction (Y). In the second direction (Y), the length of the upper cover (111) is formed slightly longer than the length of the rotary cleaner (400).

[0144] The upper cover (111) may have a cross-section that is uniform along the second direction (Y). The upper cover (111) may have an inner surface that is concave and may have a curvature corresponding to (identical or similar to) the curvature of the outer surface of the rotary cleaner (400).

[0145] The upper cover (111) is located on the upper side of the rotary cleaner (400). The inner surface of the upper cover (111) may come into contact with the outer surface of the rotary cleaner (400), or the inner surface of the upper cover (111) may be spaced apart from the outer surface of the rotary cleaner (400) by a narrow gap.

[0146] The shear edge (111a) of the upper cover (111) can be formed in a straight line along the second direction (Y). That is, the shear edge (111a) of the upper cover (111) can be formed parallel to the second direction (Y) (or the first rotation axis (R1)).

[0147] Based on the front-rear direction (first direction (X)), the front edge (111a) of the upper cover (111) may be in the same phase as the front edge of the rotary cleaner (400), or may be located behind the front edge of the rotary cleaner (400) or in front of the front edge of the rotary cleaner (400).

[0148] The upper housing (110) may include a rear cover (112).

[0149] In the upper housing (110), when the upper cover (111) forms the front part, the rear cover (112) forms the rear part.

[0150] The rear cover (112) is attached to the rear of the upper cover (111). The rear cover (112) is formed long along the second direction (Y), and the length of the rear cover (112) in the second direction (Y) may be the same as or similar to the length of the upper cover (111).

[0151] The rear cover (112) forms a part that is fixedly connected to the nozzle neck part (200) in the upper housing (110).

[0152] The lower housing (120) is generally formed to be long along the second direction (Y). In the second direction (Y), the length of the lower housing (120) is slightly longer than the length of the rotary cleaner (400).

[0153] The lower housing (120) forms the bottom surface of the nozzle head part (100) and also forms the bottom surface of the nozzle housing (11).

[0154] The lower housing (120) is located on the lower side of the upper housing (110) and is fixed to the upper housing (110).

[0155] The lower housing (120) is located at the rear of the rotary cleaner (400). As the lower housing (120) is fixed to the upper housing (110), a suction port (101) is provided between the lower housing (120) and the rotary cleaner (400). That is, the suction port (101) is provided in the front part of the lower housing (120). In particular, the suction port (101) is provided in the center of the lower housing (120) in the left-right direction.

[0156] The first side wall (130) is formed to shield one side of the rotary cleaner (400) and is fixedly connected to the upper housing (110) and the lower housing (120).

[0157] The second side wall (140) shields the side of the rotary cleaner (400) on the opposite side of the first side wall (130) and is fixedly connected to the upper housing (110) and the lower housing (120).

[0158] When the first side wall (130) forms the left side of the nozzle head part (100), the second side wall (140) forms the right side of the nozzle head part (100).

[0159] The first side wall (130) is formed to include a first inclined portion (132). The first inclined portion (132) forms the lower front corner of the first side wall (130) and may be formed in an inclined or curved shape. The first inclined portion (132) may be formed in a shape that faces backward as it faces downward.

[0160] The second side wall (140) is formed to include a second inclined portion (142). The second inclined portion (142) forms the lower front corner of the second side wall (140) and may be formed in an inclined or curved shape. The second inclined portion (142) may be formed in a shape that faces backward as it faces downward.

[0161] In one embodiment, a second flow path (131) is formed in the first side wall (130), and a third flow path (141) is formed in the second side wall (140).

[0162] The second channel (131) may be provided with a portion of the outer surface of the first side wall (130) stepped inward. That is, the outer surface of the first side wall (130) at the portion where the second channel (131) is formed forms a concave shape inward.

[0163] The second Euro (131) can be formed along the entire length of the front-rear direction (first direction (X)) from the first side wall (130). The second Euro (131) extends to the first inclined section (132).

[0164] Accordingly, when the first side wall (130) is in close contact with the wall surface of the interior, the first side wall (130) is spaced apart from the wall surface of the interior at least at the point where the second flow path (131) is formed, and air can be exchanged between the outside and inside of the suction nozzle through the second flow path (131).

[0165] The first Euro (430) may be formed at the bottom of the first side wall (130), and for this purpose, the bottom portion of the first side wall (130) is formed in a stepped shape inwardly.

[0166] The third channel (141) may be provided with a portion of the outer surface of the second side wall (140) stepped inward. That is, the outer surface of the second side wall (140) at the portion where the third channel (141) is formed forms a shape that is concave inward.

[0167] The third Euro (141) can be formed along the entire length of the front-rear direction (first direction (X)) from the second side wall (140). The third Euro (141) extends to the second inclined section (142).

[0168] Accordingly, when the second side wall (140) is in close contact with the wall surface of the interior, the second side wall (140) is separated from the wall surface of the interior at least at the point where the third flow path (141) is formed, and air can be exchanged between the outside and inside of the suction nozzle through the third flow path (141).

[0169] A third Euro (141) may be formed at the bottom of the second side wall (140), and for this purpose, the bottom portion of the second side wall (140) is formed in a stepped shape inwardly.

[0170] The inner wall (150) is generally provided inside the nozzle head portion (100). The inner wall (150) is formed lengthwise along the second direction (Y), which is parallel to the first rotation axis (R1). The front surface of the inner wall (150) is flat or curved. The front surface of the inner wall (150) can contact the outer surface of the rotation cleaner (400) at the rear of the rotation cleaner (400).

[0171] The upper corner (152) of the inner wall (150) is joined and fixed to the bottom surface of the upper housing (110).

[0172] The lower corner (151) of the inner wall (150) is formed higher than the bottom of the rotary cleaner (400). That is, when the suction nozzle (10) is placed on the bottom surface (B), the inner wall (150) is formed so as not to block the space between the rotary cleaner (400) and the suction port (101), and is formed so as to allow communication between the space where the rotary cleaner (400) is located and the suction port (101) through the bottom of the inner wall (150).

[0173] In one embodiment, the lower corner (151) of the inner wall (150) may be lower than the first rotation axis (R1).

[0174] In one embodiment, the nozzle head portion (100) is provided with a first guide channel (102) and a second guide channel (103).

[0175] The first induction channel (102) forms a space extending from the intake port (101) along a direction parallel to the first rotation axis (R1). The second induction channel (103) forms a space extending from the intake port (101) along a direction opposite to that of the first induction channel (102). That is, the first induction channel (102) and the second induction channel (103) are formed on opposite sides of the intake port (101). When the first induction channel (102) is provided on the left side of the intake port (101), the second induction channel (103) is provided on the right side of the intake port (101).

[0176] The first guiding path (102) and the second guiding path (103) form a path that guides foreign substances toward the suction port (101).

[0177] The first induction channel (102) and the second induction channel (103) may be formed by a lower housing (120) and an inner wall (150). The front surface of the lower housing (120) may form the rear wall surface of the first induction channel (102) and the second induction channel (103), and the bottom surface of the rear portion of the inner wall (150) may form the upper wall surface of the first induction channel (102) and the second induction channel (103).

[0178] Based on the second direction (Y), the lengths of the first guide channel (102) and the second guide channel (103) are sufficient to guide foreign matter into the suction port (101). To this end, based on the second direction (Y), the length of the first guide channel (102) may be at least 1 / 4 of the length of the rotary cleaner (400), or at least 1 / 3 of the length. Additionally, based on the second direction (Y), the length of the second guide channel (103) may be at least 1 / 4 of the length of the rotary cleaner (400), or at least 1 / 3 of the length.

[0179] In one embodiment, the rear portion of the rotary cleaner (400) is exposed toward the suction port (101), the first induction channel (102), and the second induction channel (103) in an area lower than the first rotation axis (R1).

[0180] In one embodiment, with respect to the second direction (Y), the total length of the first guide channel (102), the suction port (101), and the second guide channel (103) may be equal to or greater than the length of the rotary cleaner (400).

[0181] In another embodiment, with respect to the second direction (Y), the total length of the first guide channel (102), the suction port (101), and the second guide channel (103) may be slightly smaller than the length of the rotary cleaner (400).

[0182] FIG. 9 is a drawing illustrating a rotary cleaner (400).

[0183] FIG. 10a is a drawing showing the core (410) of a rotary cleaner (400).

[0184] FIGS. 10b and FIGS. 10c are drawings illustrating the unfolded appearance of the outer surface layer (415) forming the rotary cleaner (400).

[0185] FIG. 10d is a cross-section of the outer surface layer (415) of FIG. 10c.

[0186] FIG. 11a is a cross-section along B-B' in FIG. 9, FIG. 11b is a cross-section along C-C' in FIG. 9, and FIG. 11c is a cross-section along D-D' in FIG. 9.

[0187] FIG. 12a is a drawing showing a rotary cleaner (400) according to one embodiment, and FIG. 12b is a side view showing the rotary cleaner (400) of FIG. 12a.

[0188] The rotary cleaner (400) is rotatably coupled to the nozzle head portion (100) with respect to a first rotation axis (R1) parallel to the left and right directions. The rotary cleaner (400) is positioned in front of the suction port (101).

[0189] The rotary cleaner (400) comprises a core (410), a fluffy (420), and a first flow path (430).

[0190] The core (410) is formed as a cylinder with the first rotation axis (R1) as the central axis. The core (410) can have a cross-section (outer surface) that is uniform along the second direction (Y).

[0191] The core (410) may be made of a relatively hard material, and the core (410) may be made of plastic and / or metal material.

[0192] Fluffy (420) is formed to be attached to the outer surface of the core (410) and to come into contact with the bottom surface.

[0193] The fluffy (420) can be made of a material that is sufficiently soft and plush compared to the core (410). When the rotating cleaner (400) comes into contact with the floor surface and rotates, the core (410) maintains its shape, and the fluffy (420) can change its shape while in contact with the floor surface.

[0194] Fluffy (420) is made of one or more of a brush and a textile.

[0195] The term "textile" as described in the embodiments of the present invention refers to a product made from fibers. Textiles may include materials such as yarn, woven fabric, knitted fabric, lace, mesh, felt, cotton, and paper, as well as products made from these materials.

[0196] The brush described in the embodiments of the present invention may be made of the same shape and material as a conventional brush. The brush may be made of a combination of bristles, a combination of short threads, a combination of fibers, or a combination of fine pins, etc. The 'fibers' described below may be replaced with bristles, threads, and / or pins, unless otherwise specifically limited.

[0197] Fluffy (420) can be made of a brush, or of textile, or of a combination of a brush and textile.

[0198] In one embodiment, the fluffy (420) may be made of flannel.

[0199] When the fluffy (420) is made of a brush, each fiber (421) constituting the fluffy (420) (brush) is formed in a shape that protrudes radially from the outer surface of the core (410).

[0200] In the fluffy (420), each fiber (421) may be formed in a densely packed form. In one embodiment, each fiber (421) may be densely packed so that at least a portion thereof may touch an adjacent fiber (421). In another embodiment, the fibers (421) may be densely packed so that the spacing between them is equal to or smaller than the diameter of each fiber (421).

[0201] The diameter of each fiber (421) constituting the fluffy (420) (brush) can vary. For example, the diameter of the fiber (421) constituting the fluffy (420) can vary from a few micrometers to several hundred micrometers.

[0202] The fluffy (420) is formed to have a predetermined thickness (radial thickness of the rotary cleaner (400)). The fluffy (420) may be formed to have a predetermined thickness range over its entire area.

[0203] The first Euro (430) forms a space as a concave groove (valley) on the outer surface of the rotary cleaner (400).

[0204] The first Euro (430) forms a space that crosses Fluffy (420).

[0205] The first Euro (430) may be a space from which the fiber (421) forming the fluffy (420) is excluded.

[0206] In an embodiment of the present invention, the outer surface of the rotary cleaner (400) may be covered entirely with fluffy (420), except for the first flow path (430). That is, the configuration forming the outer surface of the rotary cleaner (400) may only include the first flow path (430) and fluffy (420).

[0207] The first Euro (430) can be formed from the left end to the right end of the rotary cleaner (400).

[0208] The first flow path (430) may be formed such that its longitudinal direction is inclined with respect to the first rotation axis (R1). In one embodiment, the first flow path (430) may be formed in a spiral shape. That is, the first flow path (430) may form a spiral shape centered on the first rotation axis (R1).

[0209] In the rotary cleaner (400) according to an embodiment of the present invention, the first fluid path (430) is formed as a single line. That is, all first fluid paths (430) formed on the outer surface of the rotary cleaner (400) are connected in the form of a single line without parts being separated from each other.

[0210] The first Euro (430) includes a first boundary surface (431) and a second boundary surface (432).

[0211] The first boundary surface (431) is a surface that forms the boundary between the first Euro (430) and Fluffy (420). The first boundary surface (431) is formed in a spiral shape.

[0212] The second boundary surface (432) is a surface that forms the boundary between the first Euro (430) and Fluffy (420) on the opposite side of the first boundary surface (431). The second boundary surface (432) is also formed in a spiral shape.

[0213] The second boundary surface (432) is located behind the first boundary surface (431) based on the rotational direction of the rotary cleaner (400).

[0214] In an embodiment of the present invention, the rotary cleaner (400) may be configured to rotate in a rolling manner toward the front of the suction nozzle (10). When viewed from the left side of the suction nozzle (10), the rotary cleaner (400) may rotate counterclockwise, and when viewed from the right side of the suction nozzle (10), the rotary cleaner (400) may be configured to rotate clockwise.

[0215] The rotation of the rotary cleaner (400) enables foreign matter located on the front bottom surface of the rotary cleaner (400) to be quickly moved to the rear space of the rotary cleaner (400) (particularly, the suction port (101)).

[0216] In one embodiment, when viewed from a cross-section of the rotary cleaner (400), the first boundary surface (431) and the second boundary surface (432) are formed perpendicular to the outer surface of the core (410). That is, on the cross-section of the rotary cleaner (400), the first boundary surface (431) and the second boundary surface (432) are formed along the radial direction of the rotary cleaner (400).

[0217] By forming the first boundary surface (431) and the second boundary surface (432) in this manner, when a suction force (or negative pressure) is applied along the first flow path (430), the suction force (or negative pressure) does not move out of the first flow path (430) and can be applied intensively only on the first flow path (430), and additionally, foreign substances moving through the first flow path (430) can move quickly and effectively along the path formed by the first flow path (430).

[0218] The rotary cleaner (400) of the vacuum cleaner (1) according to an embodiment of the present invention needs to be formed to have a size and shape most suitable for adsorbing and transporting foreign substances, and also the first flow path (430) of the rotary cleaner (400) needs to be formed to have a size and shape most suitable as a passage through which suction force (or negative pressure) acts and foreign substances move.

[0219] Taking these points into consideration, in an embodiment of the present invention, the distance between the inner end of the first boundary surface (431) (the part closest to the core (410)) and the inner end of the second boundary surface (432) (the part closest to the core (410)) may be greater than 3 times and less than 4 times the height of the first boundary surface (431).

[0220] And the core (410) may have an outer diameter in the range of 35 to 40 mm and a length in the range of 210 to 230 mm. In one embodiment, the core (410) may have an outer diameter of about 38 mm and a length of about 222 mm.

[0221] Additionally, the first channel (430) may have a width (inner width, d3) in the range of 15 to 25 mm and a depth (d4) in the range of 3 to 7 mm. In one embodiment, the first channel (430) may have a width (inner width, d3) of about 21 mm and a depth (d4) of about 6 mm.

[0222] If the width (d3) and depth (d4) of the first channel (430) are too large, the area of ​​the fluffy (420) is relatively reduced, which may impair the adsorption and transport of dust and the like by the fluffy (420) and prevent the suction force from acting intensively on the first channel (430). Additionally, if the width and depth of the first channel (430) are too small, it may be difficult to transport foreign substances through the first channel (430) or it may take too much time to clean. In an embodiment of the present invention, the first channel (430) is constructed as described above to resolve these problems.

[0223] The first Euro (430) can have a constant width and depth along its length.

[0224] As described above, the first flow path (430) and the first boundary surface (431) and the second boundary surface (432), which are the two sides of the first flow path (430), may be formed in a spiral shape. In an embodiment of the present invention, the first flow path (430) may be formed in a spiral shape that rotates the rotary cleaner (400) about one full rotation or in a spiral shape that is slightly less than one full rotation, and this will be explained below.

[0225] In one embodiment, the angle between the first normal plane (S1) that meets the front end of the first boundary plane (431) among the normal planes of the outer surface of the rotary cleaner (400) and the second normal plane (S2) that meets the rear end of the second boundary plane (432) among the normal planes of the outer surface of the rotary cleaner (400) may be 0 to 45°. (See FIG. 12a and FIG. 12b)

[0226] The first boundary surface (431) includes a first front end (431a) and a first rear end (431b) that form both ends. The first front end (431a) is the portion that forms the front end of the first boundary surface (431) with respect to the rotational direction of the rotary cleaner (400). The first rear end (431b) is the portion that forms the rear end of the first boundary surface (431) with respect to the rotational direction of the rotary cleaner (400).

[0227] The second boundary surface (432) includes a second front end (432a) and a second rear end (432b) that form both ends. The second front end (432a) is the portion that forms the front end of the second boundary surface (432) with respect to the rotational direction of the rotary cleaner (400). The second rear end (432b) is the portion that forms the rear end of the second boundary surface (432) with respect to the rotational direction of the rotary cleaner (400).

[0228] The reference line (RL) connecting the first front end (431a) and the second rear end (432b) can be formed parallel to the first rotation axis (R1). (See FIG. 9)

[0229] The rotary cleaner (400) can be formed by combining an outer surface layer (415) with the outer surface of the core (410). Before being combined with the core (410), the outer surface layer (415) can be spread out flat.

[0230] The outer surface layer (415) may consist of a base region (417) and a fluffy region (420') fixedly coupled to the base region (417).

[0231] The base area (417) may be in the form of a thin cloth, net, or film. The area of ​​the base area (417) may correspond (same or similar) to the area of ​​the outer surface of the core (410).

[0232] The fluffy area (420') forms fluffy (420).

[0233] The fluffy region (420') is made of fiber (421) and is formed on the outer surface of the base region (417). The fluffy region (420') may be formed integrally with the base region (417), or may be formed separately and then fixedly coupled to the base region (417).

[0234] The outer surface layer (415) may be formed to include a first flow path region (430') that forms a first flow path (430). The first flow path region (430') may be an area (space) outside the base region (417) where a fluffy region (420') is not formed.

[0235] As the inner surface of the base area (417) is fixedly coupled to the outer surface of the core (410), the outer surface layer (415) forms the fluffy (420) and the first flow path (430).

[0236] In one embodiment, the outer surface layer (415) may be formed such that it does not have the first flow area (430') and only has the fluffy area (420'), or only has the base area (417) and the fluffy area (420').

[0237] In one embodiment, the flattened outer surface layer (415) may be formed in a rectangular shape. In this case, the length of the horizontal side of the outer surface layer (415) may be equal to the length (d2) of the rotary cleaner (400), and the length of the vertical side of the outer surface layer (415) may be equal to the circumference length (circumference length, d1) of the outer surface of the core (410).

[0238] When the outer surface layer (415) is joined to the outer surface of the core (410), the lower horizontal side (E1) and the upper horizontal side (E2) of the outer surface layer (415) are joined so that they come into contact with each other, and the outer surface layer (415) can form a fluffy (420) and a first flow path (430).

[0239] Again, when the first flow path area (430') is formed as a single straight line in the outer surface layer (415) which is formed in a rectangular shape, the first flow path area (430') is formed in a shape that crosses the outer surface layer (415) diagonally.

[0240] Accordingly, the fluffy area (420') is divided into two areas centered around the first Euro area (430'). That is, the fluffy area (420') is divided into a first fluffy area (420a) in the shape of a triangle and a second fluffy area (420b) in the shape of another triangle. (See FIG. 10b)

[0241] In another embodiment, the flattened outer surface layer (415) may be formed in the shape of a parallelogram. In this case, the length of one relatively long side of the outer surface layer (415) may be equal to the length of the first flow path (430) (length of the first flow path region (430')), and the length of the other relatively short side of the outer surface layer (415) may be equal to the length of the circumference (d1) of the outer surface of the core (410). When the outer surface layer (415) is joined to the outer surface of the core (410), the two relatively long sides (E3, E4) are joined so that they come into contact with each other, and the outer surface layer (415) may form the fluffy (420) and the first flow path (430).

[0242] In addition, at this time, the first flow path area (430') may be formed along one corner of the fluffy area (420'). That is, the fluffy area (420') may be formed in the shape of a parallelogram, and the first flow path area (430') may also be formed in the shape of a long parallelogram and formed at the corner of the fluffy area (420').

[0243] Therefore, when the outer surface layer (415) is formed in the shape of a parallelogram, the fluffy region (420') can be formed as a single region, which is advantageous for manufacturing the outer surface layer (415), and also prevents problems such as the fluffy (420) being partially separated or partially overlapping when the outer surface layer (415) is combined with the core (410).

[0244] Figures (a), (b), (c), (d), (e), (f), (g) and (h) of FIG. 13 are schematic drawings illustrating the rotation of a rotating cleaner (400) while it is in contact with the bottom surface (B) and the front wall surface (W1).

[0245] Figures 14 (a), (b), (c) and (d) are each drawings of the suction nozzle (10) in contact with the front wall, viewed from below, and schematically show the direction and path of air movement.

[0246] When viewing the rotary cleaner (400) from the second direction (Y), the first boundary surface (431) appears in a projected form in the second direction (Y), and the first boundary surface (431) is generally formed in a circular shape. However, the first boundary surface (431) does not form a perfect circle, and the first front end (431a) and the first rear end (431b), which are the two ends of the first boundary surface (431), form a circle that is slightly spaced apart from each other.

[0247] Additionally, when viewing the rotary cleaner (400) from the second direction (Y), the second boundary surface (432) appears in a projected form in the second direction (Y), and the second boundary surface (432) is generally formed in a circular shape. However, the second boundary surface (432) does not form a perfect circle, and the two ends of the second boundary surface (432), the second front end (432a) and the second rear end (432b), form a circle that is slightly spaced apart from each other.

[0248] However, when viewing the rotary cleaner (400) from the second direction (Y), the first front end (431a) and the second rear end (432b) may be formed at points that coincide with each other.

[0249] The lower end of the rotary cleaner (400) contacts the floor surface along the second direction (Y), and the first space (A1), which is the space on the floor immediately in front of the rotary cleaner (400), and the second space (A2), which is the space on the floor immediately behind the rotary cleaner (400), are blocked by the rotary cleaner (400). The second space (A2) corresponds to the space where the suction port (101), the first guiding channel (102), and the second guiding channel (103) are located.

[0250] When the suction nozzle (10) moves forward, the rotary cleaner (400) moves forward together with the suction nozzle (10) while rolling and rotating. Accordingly, foreign matter in the first space (A1) is adsorbed to or swept away by the outer surface of the rotary cleaner (400) and moves toward the second space (A2), and can be sucked into the suction port (101).

[0251] The vacuum cleaner (1) should be designed to effectively suck up foreign substances, such as dust accumulated at the bottom corner of the wall. That is, even when the suction nozzle (10) touches the front wall and cannot advance further, foreign substances in the first space (A1) must move toward the second space (A2) and then be sucked into the suction port (101).

[0252] Since the rotary cleaner (400) according to the embodiment of the present invention has a first flow path (430) formed on its outer surface, communication between the first space (A1) and the second space (A2) is effectively achieved through the first flow path (430). Accordingly, the suction force (or negative pressure) of the second space (A2) is effectively transmitted toward the first space (A1), and foreign matter located in the first space (A1) is effectively moved toward the second space (A2).

[0253] This is explained below.

[0254] When the suction nozzle (10) is in close contact with the front wall (W1), the suction force (or negative pressure) acting at the suction port (101) is mainly transmitted toward the first space (A1) through the first passage (430), and at this time, external air is drawn in toward the center from both the left and right sides (first inclined section (132) and second inclined section (142)) of the first space (A1) by the negative pressure formed on the first space (A1). The smooth inflow of external air toward the first space (A1) helps the action of the suction force (negative pressure) on the first passage (430).

[0255] As described above, the inner wall (150) can be in close contact with the back surface of the rotary cleaner (400).

[0256] When the second rear end (432b) is located at the rearmost part of the rotating cleaner (400), the line connecting the second rear end (432b) to the first rotation axis (R1) is parallel to the horizontal direction, and the second front end (432a) is located at the rear of the rotating cleaner (400) at a lower point than the second rear end (432b). (See FIG. 13 (a)) The second rear end (432b) may be located higher than the bottom of the inner wall (150) and the second front end (432a) may be located lower than the bottom of the inner wall (150). At this time, the suction force formed at the suction port (101) is transmitted toward the first passage (430) in the lower part, and foreign matter in the first space (A1) can move to the second space (A2) through the first passage (430) and be sucked into the suction port (101). That is, the direction of action of the suction force in the first Euro (430) coincides with the direction of rotation of the rotary cleaner (400).

[0257] When the rotating cleaner (400) rotates (counterclockwise), and the second rear end (432b) rotates 45° counterclockwise (see Fig. 13 (b)), the second rear end (432b) rotates 90° (see Fig. 13 (c)), the second rear end (432b) rotates 135° (see Fig. 13 (d)), and the second rear end (432b) rotates 180° (see Fig. 13 (e)), the suction force formed at the suction port (101) is transmitted toward the first passage (430) in the lower part, and foreign matter in the first space (A1) can move through the first passage (430) to the second space (A2) and be sucked into the suction port (101). That is, the direction of action of the suction force in the first Euro (430) coincides with the direction of rotation of the rotary cleaner (400).

[0258] When the rotating cleaner (400) rotates further (counterclockwise) so that the second rear end (432b) rotates 225° (see (f) in FIG. 13), a portion of the suction force formed at the suction port (101) is transferred to the first flow path (430) in the lower portion, and another portion of the suction force formed at the suction port (101) is transferred to the first flow path (430) in the upper portion.

[0259] At this time, in the first Euro (430), some of the direction of action of the suction force coincides with the rotational direction of the rotary cleaner (400), and other parts are opposite to the rotational direction of the rotary cleaner (400). That is, a partial transition occurs in the direction in which the suction force acts.

[0260] When the rotary cleaner (400) rotates further (counterclockwise) so that the second rear end (432b) rotates 270° (see (g) in FIG. 13), the second rear end (432b) comes into contact with the bottom surface, and the suction force formed at the suction port (101) is not transmitted to the first flow path (430) in the lower part, but to the first flow path (430) in the upper part. That is, the direction of action of the suction force in the first flow path (430) is opposite to the rotation direction of the rotary cleaner (400).

[0261] When the rotary cleaner (400) rotates further (counterclockwise) so that the second rear end (432b) rotates 315° (see (h) in FIG. 13), a portion of the suction force formed at the suction port (101) is transferred to the first flow path (430) in the lower portion, and another portion of the suction force formed at the suction port (101) is transferred to the first flow path (430) in the upper portion.

[0262] That is, in the first Euro (430), some of the directions of action of the suction force coincide with the rotational direction of the rotary cleaner (400), and other parts are opposite to the rotational direction of the rotary cleaner (400).

[0263] Thus, according to the vacuum cleaner (1) and rotary cleaner (400) of the embodiment of the present invention, communication between the first space (A1) and the second space (A2) is established through the first flow path (430) at all rotation angles of the rotary cleaner (400), so that foreign matter in the first space (A1) can be effectively and quickly sucked into the suction port (101).

[0264] Additionally, in a portion of the rotation section of the rotary cleaner (400), the direction in which the suction force acts in the first path (430) is changed. Accordingly, the suction force can act in different directions in the first space (A1), turbulence can be effectively generated in the first space (A1), and the mobility of dust in the first space (A1) can be increased. Due to these features, foreign matter in the first space (A1) can be introduced into the suction port (101) more quickly and effectively through the first path (430).

[0265] Figures 15 (a), (b), (c) and (d) are drawings of the suction nozzle (10) in contact with the front wall (W1) and the left wall (W2), respectively, viewed from below, and schematically show the direction and path of air movement.

[0266] Figures 16 (a), (b), (c) and (d) are drawings of the suction nozzle (10) in contact with the front wall (W1) and the right wall (W3), respectively, viewed from below, and schematically show the direction and path of air movement.

[0267] When the suction nozzle (10) is in close contact with the front wall (W1) and the left wall (W2), the suction force (or negative pressure) acting at the suction port (101) is mainly transmitted to the first space (A1) through the first passage (430), and at this time, external air is drawn in from both the left and right sides of the first space (A1) toward the center by the negative pressure formed on the first space (A1).

[0268] On the left side of the suction nozzle (10), external air flows into the first space (A1) through the second flow path (131) and the first inclined section (132), and on the right side of the suction nozzle (10), external air flows into the first space (A1) through the second inclined section (142).

[0269] In particular, external air flowing in through the second flow path (131) and the first inclined section (132) from the left side of the suction nozzle (10) increases the fluidity (mobility) of foreign matter located in the left corner of the first space (A1) (the corner formed by the front wall, the left wall, and the floor), and helps such foreign matter to be sucked in through the first flow path (430).

[0270] When the suction nozzle (10) is in close contact with the front wall (W1) and the right wall (W3), the suction force (or negative pressure) acting at the suction port (101) is mainly transmitted toward the first space (A1) through the first passage (430), and at this time, external air is drawn in toward the center from both the left and right sides of the first space (A1) by the negative pressure formed on the first space (A1).

[0271] On the right side of the suction nozzle (10), external air flows into the first space (A1) through the third path (141) and the second inclined section (142), and on the left side of the suction nozzle (10), external air flows into the first space (A1) through the first inclined section (132).

[0272] In particular, external air flowing in through the third channel (141) and the second inclined section (142) from the right side of the suction nozzle (10) increases the fluidity (mobility) of foreign matter located in the right corner of the first space (A1) (the corner formed by the front wall, the right wall, and the floor), and helps such foreign matter to be sucked in through the first channel (430).

[0273] Smooth inflow of external air into the first space (A1) helps the action of suction force (negative pressure) on the first path (430).

[0274] FIG. 17 is a side view of the suction nozzle (10), schematically illustrating the front wall surface being detected by the distance sensing sensor (500).

[0275] FIGS. 18a, FIGS. 18b, and FIGS. 18c are drawings of the suction nozzle (10) viewed from above, respectively, schematically illustrating the front wall surface being detected by the distance sensing sensor (500).

[0276] In one embodiment, the vacuum cleaner (1) comprises a distance sensing sensor (500).

[0277] The distance sensing sensor (500) is coupled to the suction nozzle (10) and configured to detect the distance to a wall surface located in front of the suction nozzle (10).

[0278] A distance sensing sensor (500) is formed in the suction nozzle (10) to detect the relative distance to an object (e.g., a wall) located in front of the suction nozzle (10). The distance sensing sensor (500) can be formed in various ways within a range capable of detecting the relative distance between the point where the distance sensing sensor (500) is formed and the wall.

[0279] The distance sensing sensor (500) may be composed of a light sensor, may be composed of an infrared sensor, or may be a distance sensor such as a LIDAR sensor. For example, the distance sensing sensor (500) may be configured to emit electromagnetic energy (e.g., visible light, infrared, or radio waves) and detect the reflection of the emitted energy.

[0280] The distance sensing sensor (500) may comprise a light-emitting part that emits light and a light-receiving part into which reflected light is incident. The distance sensing sensor (500) may be a ToF sensor.

[0281] The distance sensing sensor (500) detects the distance (d5, which may be a horizontal distance from the wall or an inclined distance from the wall) from the distance sensing sensor (500) to the wall surface (W1).

[0282] In one embodiment, the rotational speed of the first motor (31) is configured to increase when the distance value detected by the distance sensing sensor (500) is less than or equal to a reference value.

[0283] The distance value detected by the distance detection sensor (500) is transmitted to the control unit (38), and the control unit (38) controls the rotational speed of the first motor (31) according to the distance value and reference value. The control unit (38) can control the first motor (31) so that its rotational speed increases when the distance value detected by the distance detection sensor (500) is less than or equal to the reference value. For example, when the distance value is less than or equal to the reference value, the control unit (38) can immediately control the rotational speed of the first motor (31) to increase by 50% or to double.

[0284] In an embodiment of the present invention, when the distance value is greater than the reference value, that is, when the power (W) is 40W in the normal usage state of the vacuum cleaner (1), when the distance value is less than or equal to the reference value, the power of the vacuum cleaner can be made to 60W by increasing the rotational speed of the first motor (31).

[0285] In an embodiment of the present invention, the distance sensing sensor (500) is formed at a position such that it can accurately measure the relative distance with respect to the front wall surface (W1), and also accurately predict the movement time and distance of the suction nozzle (10) until the suction nozzle (10) comes into contact with the front wall and movement is stopped after the front wall surface (W1) is detected by the distance sensing sensor (500).

[0286] When the first rotation axis (R1) is parallel to the front wall surface (W1), the distance to the front wall detected by the distance sensor (500) becomes the same or similar throughout the entire section of the suction nozzle (10) along the second direction (Y).

[0287] In the case where the first rotation axis (R1) is not parallel to the front wall surface (W1), for example, the first side wall (130) is located closer to the front wall than the second side wall (140), the distance to the front wall surface (W1) detected by the distance sensor (500) is longer than the distance between the first side wall (130) and the front wall surface (W1) and shorter than the distance between the second side wall (140) and the front wall surface (W1). However, in order for the suction nozzle (10) to come into contact with the front wall surface (W1) and not advance further forward, the entire front part of the suction nozzle (10) must come into contact with the front wall.

[0288] In the case where the first rotation axis (R1) is not parallel to the front wall surface (W1), for example, the second side wall (140) is located closer to the front wall surface (W1) than the first side wall (130), the distance to the front wall surface (W1) detected by the distance sensor (500) is shorter than the distance between the first side wall (130) and the front wall surface (W1) and longer than the distance between the second side wall (140) and the front wall surface (W1). However, even in this case, in order for the suction nozzle (10) to come into contact with the front wall surface (W1) and not advance further forward, the entire front part of the suction nozzle (10) must come into contact with the front wall.

[0289] In order to predict the travel time and travel distance of the suction nozzle (10) relatively accurately until the advance of the suction nozzle (10) is prevented by the front wall surface (W1) in all directions in which the suction nozzle (10) faces, in an embodiment of the present invention, the distance sensing sensor (500) may be located above the center of the left and right directions of the suction nozzle (10).

[0290] In addition, taking this into consideration, the distance sensing sensor (500) can be coupled to the upper side of the nozzle neck portion (200) at a point higher than the top of the nozzle head portion (100).

[0291] In order to install a distance sensing sensor (500) in the suction nozzle (10), the suction nozzle (10) may be provided with a case (520) to which the distance sensing sensor (500) is fixed and a PCB board (510), and a small hole (221) through which the electromagnetic energy (visible light, infrared light, or radio waves, etc.) of the distance sensing sensor (500) passes may be formed in the suction nozzle (10).

[0292] In one embodiment, the reference value is made longer than the distance from the front end of the suction nozzle (10) to the distance sensing sensor (500). That is, the distance sensing sensor (500) detects the front wall (W1) before the front end of the suction nozzle (10) touches the front wall (W1), and the rotational speed of the first motor (31) by the control unit (38) is increased.

[0293] The distance from the front end of the suction nozzle (10) to the distance sensing sensor (500) may be in the range of 50 to 70 mm, and the reference value may be in the range of 120 to 140 mm. In one embodiment, the distance from the front end of the suction nozzle (10) to the distance sensing sensor (500) may be approximately 65 mm, and the reference value may be 130 mm.

[0294] When the control unit (38) determines that the distance value detected by the distance detection sensor (500) is less than or equal to the reference value, the control unit (38) can immediately increase the rotational speed of the first motor (31), and accordingly, the suction power inside the vacuum cleaner body (30) can be increased instantaneously. However, since the first motor (31) is provided in the vacuum cleaner body (30) and the vacuum cleaner body (30) is connected to the suction nozzle (10) through the connecting pipe (20), it takes some time for the increased suction power of the vacuum cleaner body (30) to be transmitted to the suction nozzle (10) (the suction port (101) of the suction nozzle (10)). In one embodiment, from the point in time when the rotational speed of the first motor (31) begins to increase, the increased suction power of the vacuum cleaner body is transmitted to the suction nozzle (10), and the time required for the suction power of the suction nozzle (10) to increase may be about 0.23 s (sec) (time of change in suction power).

[0295] Meanwhile, when using a normal vacuum cleaner, the movement speed of the suction nozzle (10) (the speed of the suction nozzle being pushed and moved by the user) may be about 500 mm / s.

[0296] Accordingly, when the variation time of the suction power of the suction nozzle (10) is 0.23 s and the moving speed of the suction nozzle (10) is 500 mm / s, the moving distance of the suction nozzle (10) until the variation (increase) of the suction power in the suction nozzle (10) is completed is 115 mm.

[0297] At this time, as described above, when the reference value is 130 mm, the suction force of the suction nozzle (10) can be increased just before the front end of the suction nozzle (10) touches the front wall, and the suction nozzle (10) can suck up foreign matter by the increased suction force.

[0298] When the suction nozzle (10) moves backward and is separated from the front wall (W1), the distance sensing sensor (500) can detect the backward movement of the suction nozzle (10), and at this time, the control unit (38) can reduce the rotational speed of the first motor (31) again.

[0299] In one embodiment, the rotational speed of the second motor (470) may be increased when the distance value detected by the distance sensing sensor (500) is less than or equal to a reference value. When a front wall is detected by the distance sensing sensor (500), the control unit (38) may increase the rotational speed of the first motor (31) to increase the suction force at the suction port (101), and may also increase the rotational speed of the second motor (470) to increase the rotational speed of the rotating cleaner (400).

[0300] When the rotational speed of the rotary cleaner (400) increases, the movement of foreign matter through the first path (430) can be carried out more quickly, and uniform cleaning can be carried out more quickly in the entire area of ​​the first space (A1) along the second direction (Y).

[0301] When the suction nozzle (10) moves backward and is separated from the front wall (W1), the distance sensor (500) can detect the backward movement of the suction nozzle (10), and at this time, the control unit (38) can reduce the rotational speed of the second motor (470) again.

[0302] Although specific embodiments of the present invention have been described and illustrated above, the present invention is not limited to the described embodiments, and those skilled in the art will understand that various modifications and variations can be made to other specific embodiments without departing from the spirit and scope of the present invention. Accordingly, the scope of the present invention should not be determined by the described embodiments but by the technical concept described in the claims. Explanation of the symbols

[0303] 1: Vacuum cleaner 10: Suction nozzle 11: Nozzle housing 20: Connecting pipe 30: Vacuum cleaner body 31: 1st motor 32: Handle 33: Dustbin 34: Main body suction port 35: Battery 100: Nozzle head section 101: Inlet 102: 1st guidance path 103: 2nd guidance path 110: Upper housing 111: Upper cover 120: Lower housing 130: First side wall 131: 2nd Euro 132: 2nd Slope 140: Second side wall 141: Third Euro 142: Second slope section 150: Inner wall 200: Nozzle neck section 300: Connecting neck 500: Distance sensing sensor 400: Rotary cleaner 410: Core 415: Outer surface layer 420: Fluffy 421: Fiber 430: 1st Euro 431: 1st Boundary 432: Second boundary surface 431a: First forward end 432a: Second front end 431b: First rear end 432b: Second rear end 470: Second motor S1: First normal plane S2: Second normal plane R1: First rotation axis R2: Second rotation axis RL: Baseline

Claims

Claim 1 A vacuum cleaner comprising: a nozzle head portion having a suction port provided on the bottom surface, and a rotating cleaner located in front of the suction port and rotatably coupled to the nozzle head portion; a vacuum cleaner body connected to the suction nozzle and having a first motor that rotates to form a suction force in the suction port; and a distance sensing sensor coupled to the suction nozzle and configured to detect a distance to a wall surface located in front of the suction nozzle, wherein the rotational speed of the first motor is configured to increase when the distance value detected by the distance sensing sensor is less than or equal to a reference value, and the rotating cleaner comprises: a cylindrical core having a first rotation axis parallel to the left-right direction as a central axis; a fluffy coupled to the outer circumference of the core and configured to contact the bottom surface; and a first flow path that crosses the fluffy and is in the form of a concave groove along the direction inclined with the first rotation axis, wherein in the rotating cleaner, the first flow path is formed as a single line and is configured to rotate the rotating cleaner approximately once. Claim 2 A vacuum cleaner according to claim 1, wherein the distance sensing sensor is composed of an optical sensor and is located on the upper side of the left-right center of the suction nozzle. Claim 3 A vacuum cleaner according to claim 1, wherein the suction nozzle comprises: a connecting neck formed in a tubular shape and connected to the main body of the vacuum cleaner; and a nozzle neck portion formed in a tubular shape and extending rearward from the nozzle head portion and rotatably coupled to the connecting neck around a second rotation axis, and the distance sensing sensor is coupled to the upper side of the nozzle neck portion at a point higher than the top of the nozzle head portion. Claim 4 A vacuum cleaner according to claim 1, comprising a connecting pipe coupled between the suction nozzle and the main body of the vacuum cleaner, wherein the distance from the front end of the suction nozzle to the distance sensing sensor is 50 to 70 mm and the reference value is 120 to 140 mm. Claim 5 A vacuum cleaner according to claim 1, comprising a second motor coupled to the suction nozzle to rotate the rotary cleaner, wherein the rotational speed of the second motor is configured to increase when the distance value detected by the distance sensing sensor is less than or equal to a reference value. Claim 6 A vacuum cleaner according to claim 1, wherein the fluffy comprises one or more of a brush and a textile, and the outer surface of the rotary cleaner is covered by the fluffy except for the first fluid path. Claim 7 A vacuum cleaner according to claim 6, wherein the first channel comprises a first boundary surface forming the boundary between the first channel and the fluffy; and a second boundary surface forming the boundary between the first channel and the fluffy on the opposite side of the first boundary surface, wherein in a cross-section of the rotary cleaner, the first boundary surface and the second boundary surface are formed perpendicular to the outer surface of the core. Claim 8 A vacuum cleaner according to claim 7, wherein the gap between the inner end of the first boundary surface and the inner end of the second boundary surface is greater than 3 times the height of the first boundary surface and less than 4 times. Claim 9 A vacuum cleaner according to claim 6, wherein the core has an outer diameter of 35 to 40 mm and a length of 210 to 230 mm, and the first fluid path has a width of 15 to 25 mm and a depth of 3 to 7 mm. Claim 10 In paragraph 6, the first Euro is formed in a spiral shape, and the width and depth are constant along the longitudinal direction, a vacuum cleaner. Claim 11 A vacuum cleaner according to claim 6, wherein the first channel comprises: a first boundary surface formed spirally, which forms the boundary between the first channel and the fluffy; and a second boundary surface formed spirally, which is parallel to the first boundary surface behind the first boundary surface with respect to the rotational direction of the rotary cleaner, and which forms the boundary between the first channel and the fluffy, and wherein the angle between the first normal plane that meets the front end of the first boundary surface among the normal planes of the outer surface of the rotary cleaner and the second normal plane that meets the rear end of the second boundary surface among the normal planes of the outer surface of the rotary cleaner is 0 to 45°. Claim 12 In claim 6, the first channel comprises: a first boundary surface formed spirally, which forms the boundary between the first channel and the fluffy; and a second boundary surface formed spirally, which is parallel to the first boundary surface behind the first boundary surface with respect to the rotational direction of the rotary cleaner, and which forms the boundary between the first channel and the fluffy, wherein the first boundary surface comprises a first front end forming a front end and a first rear end forming a rear end with respect to the rotational direction of the rotary cleaner, and the second boundary surface comprises a second front end forming a front end and a second rear end forming a rear end with respect to the rotational direction of the rotary cleaner, and a reference line connecting the first front end and the second rear end is parallel to the first rotation axis, a vacuum cleaner. Claim 13 A vacuum cleaner according to claim 6, wherein the nozzle head portion comprises: a first guide channel forming a space extending along a direction parallel to the first rotation axis from the suction port; and a second guide channel forming a space extending along a direction opposite to the first guide channel from the suction port, and the rear portion of the rotary cleaner is exposed toward the suction port, the first guide channel, and the second guide channel in an area lower than the first rotation axis. Claim 14 In claim 6, the nozzle head portion comprises: an upper housing including an upper cover formed along a direction parallel to the first rotation axis and covering the upper side of the rotating cleaner; a lower housing located below the upper housing, with the suction port formed at the center front end in the left-right direction; a first side wall shielding one side of the rotating cleaner and coupled to the upper housing and the lower housing; a second side wall shielding the side of the rotating cleaner on the opposite side of the first side wall and coupled to the upper housing and the lower housing; and an inner wall formed along a direction parallel to the first rotation axis, contacting the rotating cleaner from behind, with its upper end coupled to the bottom surface of the upper housing, and its lower corner higher than the rotating cleaner, a vacuum cleaner. Claim 15 In paragraph 14, a vacuum cleaner in which the lower end of the inner wall is lower than the first rotation axis. Claim 16 In paragraph 14, the front edge of the upper cover is located further forward than the rotary cleaner and is parallel to the first rotation axis, a vacuum cleaner. Claim 17 A vacuum cleaner according to claim 14, wherein the first side wall and the second side wall are formed in a shape of a sloped or sloped curve at the lower front corner, a second flow path stepped inwardly is formed at the lower end of the outer surface of the first side wall, and a third flow path stepped inwardly is formed at the lower end of the outer surface of the second side wall. Claim 18 In claim 6, the rotary cleaner comprises: the core; and an outer surface layer coupled to the outer surface of the core, wherein the outer surface layer comprises a fluffy region forming the fluffy; and a first flow path region forming the first flow path, and when the outer surface layer is spread flat, the fluffy region forms a parallelogram and the first flow path region is formed along one side of the fluffy region, a vacuum cleaner.

Images