Cleaning machine nozzle

Abstract

The invention relates to a cleaning machine nozzle comprising: a nozzle housing; a first stirrer rotatably coupled to the nozzle housing; a second stirrer rotatably coupled to the nozzle housing; a suction port which is formed between the first stirrer and the second stirrer and into which air containing dust flows; and a connection pipe in which a flow path communicating with the suction port is formed, the diameter of the first stirrer is different from the diameter of the second stirrer, the upper side surface of the nozzle housing is formed so as to be inclined at a prescribed angle with respect to the ground, and the overall height of the cleaner nozzle is reduced by putting down the connection pipe in the direction of the stirrer having a small diameter.

Description

Technical Field

[0001] The present invention relates to a nozzle for a cleaning machine, and more particularly to a nozzle for a cleaning machine which rotates two agitators to suck dust on a bottom surface. Background Art

[0002] A vacuum cleaner is a device that uses suction force generated by a suction motor installed inside a cleaning machine body to suck in dust and air, and separates dust from the air to collect dust.

[0003] The suction nozzle is a part that directly sucks in dust and air by contacting the bottom. The suction force generated by the suction motor installed inside the cleaning machine body is transmitted to the suction motor, and the dust and air are sucked into the suction nozzle due to the suction force.

[0004] The suction nozzle is provided with an agitator, which improves the cleaning performance by rotating to suck out the dust from the bottom or the carpet.

[0005] On the other hand, Korean Patent Publication No. KR2022-0073810A discloses a cleaning head including a front agitator and a rear agitator.

[0006] The cleaning head is provided with a suction chamber between the front agitator and the rear agitator, and the front agitator and the rear agitator rotate in opposite directions to each other to introduce dust into the suction chamber.

[0007] However, the front and rear agitators of the cleaning head are the same size, so the cleaning machine body and the pipe cannot be laid down close to the ground. Therefore, there is a limitation that the space under low furniture such as sofas and beds that the cleaning head can enter cannot be cleaned deep.

[0008] In addition, the cleaning head as described above needs to rotate two agitators of the same diameter, so that the power is evenly distributed to the two agitators, so a relatively high motor output power is required, which has the limitation of generating more power consumption.

[0009] In addition, when the cleaning head is pressed by the load of the cleaning machine body or the operating force of the user during cleaning, the two agitators with the same output power and rotating in opposite directions contact the bottom, causing increased friction, and the rotation of the agitators may stop. In this case, a large load is generated on the motor, causing the motor to be damaged. Summary of the invention

[0010] Technical issues

[0011] The present invention is developed to improve the problems of the conventional cleaning machine nozzle as described above, and an object of the present invention is to provide a cleaning machine nozzle that can be laid down with a cleaning machine body and a pipe connecting the cleaning machine body and the cleaning machine nozzle close to the ground.

[0012] Another object of the present invention is to provide a cleaning machine nozzle that can rotate two agitators while reducing the required motor output power.

[0013] Another object of the present invention is to provide a cleaning nozzle that can prevent a large load on a motor from being generated due to friction between an agitator and a floor surface even if the cleaning nozzle is pressed downward during cleaning.

[0014] Means of solving problems

[0015] In order to achieve the above-mentioned purpose, the cleaning machine nozzle of the present invention includes: a nozzle shell; a first agitator, which can be rotatably combined with the above-mentioned nozzle shell; a second agitator, which can be rotatably combined with the above-mentioned nozzle shell; a suction port, which is formed between the above-mentioned first agitator and the above-mentioned second agitator, allowing air containing dust to flow in; and a connecting pipe, which forms a flow path connected to the above-mentioned suction port.

[0016] At this time, the diameter of the first agitator is different from the diameter of the second agitator, and the upper side surface of the nozzle housing is formed to be inclined at a predetermined angle relative to the ground based on a state in which the first agitator and the second agitator are in contact with the ground.

[0017] At this time, the diameter of the first agitator disposed in the front is larger than the diameter of the second agitator disposed in the rear. Therefore, the cleaning machine body and the pipe connecting the cleaning machine body and the cleaning machine nozzle can be laid down backward.

[0018] On the other hand, a suction port may be formed between the first agitator and the second agitator. In this case, casters are arranged at predetermined intervals at both ends of the suction port in the length direction. That is, the casters may be arranged between the first agitator and the second agitator.

[0019] On the other hand, the cleaning machine nozzle of the present invention further comprises a caster receiving portion rotatably coupled to the caster, and the caster receiving portion is relatively rotatable relative to the lower side of the nozzle housing. Therefore, with the rotation of the caster receiving portion, the cleaning machine nozzle can be assisted to move forward and backward and in all directions.

[0020] On the other hand, the cleaning machine nozzle of the present invention includes: a virtual caster passing surface, which passes through the rotation center of a pair of the above-mentioned casters along the vertical direction; a virtual agitator passing surface, which passes through the rotation axis of the above-mentioned second agitator along the vertical direction; and a virtual connecting pipe connecting surface, which passes through the hinge axis that hinges the above-mentioned connecting pipe and the above-mentioned nozzle housing along the vertical direction, and the above-mentioned connecting pipe connecting surface can be arranged between the above-mentioned wheel passing surface and the above-mentioned agitator passing surface.

[0021] The cleaning machine nozzle of the present invention comprises: a connecting pipe joint part, which is formed by protruding from the upper side of the nozzle shell in a direction perpendicular to the ground based on the state that the first agitator and the second agitator contact the ground, and is hingedly connected to the connecting pipe.

[0022] On the other hand, the connecting pipe may include: a pipe having a flow path formed inside thereof and communicating with the suction port; a first turning portion which accommodates at least a portion of the pipe inside thereof and is hingedly connected to the nozzle housing; a second turning portion which is hingedly connected to the first turning portion; and a third turning portion which is rotatably connected to the second turning portion.

[0023] At this time, the second steering portion may include a locking portion that is combined with the third steering portion to limit the rotation of the third steering portion.

[0024] Furthermore, the cleaning machine nozzle of the present invention further comprises: a connecting pipe coupling portion formed at the rear side of the nozzle housing and coupled to the locking portion to release the coupling between the locking portion and the third deflection portion.

[0025] Therefore, when the locking portion is coupled to the connecting pipe coupling portion, based on the state in which the first agitator and the second agitator are in contact with the ground, at least a portion of the connecting pipe is disposed closer to the ground than the upper end of the first agitator.

[0026] Effects of the Invention

[0027] As described above, according to the cleaning machine nozzle of the present invention, the diameters of the two agitators are formed to be different, and an inclined surface can be formed on the upper side of the nozzle shell, thereby the pipe can be tilted toward the agitator with a smaller diameter, the overall height of the cleaning machine nozzle is reduced, and the pipe is kept close to the ground. Therefore, even for furniture with a low height in the lower space, the cleaning machine nozzle can be pushed deep into the space for cleaning.

[0028] In addition, by making the diameters of the two agitators different, the torque applied to the agitator with a smaller diameter is reduced, thereby reducing the output power required by the motor. Therefore, the power consumed by the cleaning machine nozzle can be reduced.

[0029] When the cleaning machine nozzle is applied downward, the caster and the second agitator can be less strongly pressed to the ground, and the friction between the first agitator and the ground can be reduced. Therefore, it is possible to prevent the motor from being subjected to a large load due to the friction between the first agitator and the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a perspective view for explaining a cleaning machine according to an embodiment of the present invention.

[0031] Figure 2 This is a perspective view for explaining a cleaning machine nozzle according to an embodiment of the present invention.

[0032] Figure 3 yes Figure 1 Bottom view of .

[0033] Figure 4 It is used for Figure 3 A cross-sectional view illustrating the position of the connecting pipe joint in FIG.

[0034] Figure 5 It is used for Figure 3 A cross-sectional view illustrating the caster storage portion in FIG.

[0035] Figure 6 This is a diagram for explaining the positional relationship between a virtual caster passing surface, a virtual agitator passing surface, and a virtual connecting pipe connecting surface in a cleaning machine nozzle according to an embodiment of the present invention.

[0036] Figure 7 This is a diagram for explaining the turning direction of the connection pipe in the cleaning machine nozzle according to one embodiment of the present invention.

[0037] Figure 8 It is a bottom view for explaining a connecting pipe in a cleaning machine nozzle according to an embodiment of the present invention.

[0038] Fig. 9 It is a partially enlarged view for explaining a locking portion and a connecting pipe coupling portion in a cleaning machine nozzle according to an embodiment of the present invention.

[0039] Fig.10 It is a side view for explaining the combined state of the locking part and the connecting pipe coupling part in the cleaning machine nozzle according to one embodiment of the present invention. DETAILED DESCRIPTION

[0040] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0041] The present invention can be implemented in various changes and can have various embodiments. Specific embodiments are illustrated in the drawings and specifically described in detail. The present invention is not limited to specific embodiments, but includes all changes, equivalents and substitutes belonging to the concept and technical scope of the present invention.

[0042] Figure 1 A perspective view for explaining a cleaning machine according to an embodiment of the present invention is shown. Figure 2 A perspective view of a cleaning machine nozzle for explaining an embodiment of the present invention is shown. Figure 3 Show Figure 2 Bottom view of Figure 4 A cross-sectional view is shown for explaining the position of the connecting pipe joint portion in the cleaning machine nozzle according to one embodiment of the present invention. Figure 5 A cross-sectional view for explaining a caster housing portion in a cleaning machine nozzle according to an embodiment of the present invention is shown.

[0043] Reference Figures 1 to 5 , the cleaning machine nozzle 1 of the present invention is described as follows.

[0044] As an example, the cleaning machine nozzle 1 of this embodiment can be connected to a handheld cleaning machine or a tank cleaning machine for use.

[0045] In addition, the "bottom surface" in this specification refers not only to the bottom surface of a living room or a room, but also to clean surfaces such as carpets.

[0046] That is, the cleaning machine nozzle 1 can be detachably connected to the cleaning machine body 2 or the extension tube 3. The cleaning machine nozzle 1 is connected to the cleaning machine body 2 or the extension tube 3, so that the user can clean the bottom surface using the cleaning machine nozzle 1. At this time, the cleaning machine body 2 connected to the cleaning machine nozzle 1 is a multi-cyclone type, which can separate dust in the air.

[0047] The cleaning machine nozzle 1 can be operated by being powered by the cleaning machine body 2. Specifically, the cleaning machine nozzle 1 can be operated by being powered by a battery (not shown) provided in the cleaning machine body 2.

[0048] The cleaning machine body 2 connected to the cleaning machine nozzle 1 includes a suction motor (not shown), and thus suction force generated by the suction motor (not shown) is applied to the cleaning machine nozzle 1 .

[0049] Therefore, in the present embodiment, the cleaning machine nozzle 1 performs the function of sucking foreign matter and air on the bottom surface and guiding them to the cleaning machine body 2 .

[0050] A cleaning machine nozzle 1 according to an embodiment of the present invention includes a nozzle housing 100 , a first agitator 200 , a second agitator 300 and a connecting pipe 400 .

[0051] For reference, the directions used in the present invention are described below.

[0052] The present invention can define the direction of the cleaning machine nozzle 1 based on the suction port 121. Specifically, based on the suction port 121, the direction where the first agitator 200 is arranged is called the front of the cleaning machine nozzle 1, and based on the suction port 121, the direction where the second agitator 200 is arranged is called the rear of the cleaning machine nozzle 1. In addition, based on the state where the cleaning machine nozzle 1 is placed on the bottom surface (ground) (the state where the first agitator 200 and the second agitator 300 are in contact with the bottom surface), the direction away from the bottom surface is called the upper side (upper side), and the direction close to the bottom surface is called the lower side (lower side).

[0053] The nozzle housing 100 has the first agitator 200 and the second agitator 300 installed therein, which may constitute the outer shape of the cleaning machine nozzle 1. In addition, the connection pipe 400 may be coupled to the nozzle housing 100.

[0054] The nozzle housing 100 may include an upper side surface 110 of the nozzle housing 100 for coupling with the connection pipe 400. The connection pipe coupling portion 130 may be protrudingly formed on the upper side surface 110. Also, the connection pipe coupling portion 130 may be hinge-coupled with the connection pipe 400.

[0055] The upper side surface 110 of the nozzle housing 100 is formed to be inclined at a predetermined angle with respect to the ground surface, based on a state in which the first agitator 200 and the second agitator 300 are in contact with the bottom surface (ground surface).

[0056] Specifically, based on the state in which the first agitator 200 and the second agitator 300 contact the bottom surface (ground), the side of the upper side 110 where the first agitator 200 is arranged is farther from the ground than the other side where the second agitator 300 is arranged.

[0057] Therefore, according to this embodiment, there is an advantage that the rear height of the nozzle housing 100 can be reduced. When the rear height is lowered, the connection pipe 400 hingedly coupled to the nozzle housing 100 is rotatable at a larger angle toward the rear side of the cleaning machine nozzle 1. In this case, the height from the ground to the uppermost end of the connection pipe 400 can be lowered. As described above, the lower the height from the ground to the uppermost end of the connection pipe 400, the easier it is to introduce the cleaning machine nozzle into the narrow space below the furniture or chair, etc., which has the effect of widening the area that can be cleaned.

[0058] The nozzle housing 100 may include a lower side 120 where the first agitator 200 and the second agitator 300 are arranged.

[0059] At this time, the lower side surface 120 is arranged to face the bottom surface in a state where the nozzle housing 100 is placed on the bottom surface (ground).

[0060] The nozzle housing 100 is formed with a suction port 121. Specifically, the suction port 121 is formed on the lower side 120 of the nozzle housing 100. The suction port 121 indicates a space into which air containing dust can flow. With such a structure, when a suction motor (not shown) of the cleaning machine body 2 is operated, dust and air located around the bottom surface are sucked into the flow path of the cleaning machine nozzle 1 through the suction port 121.

[0061] A printed circuit board (not shown) for controlling an agitator motor (not shown) is provided inside the nozzle housing 100 .

[0062] In addition, a flow path that communicates with the suction port 121 and guides the air flowing in from the suction port 121 to the cleaning machine body 2 is formed in the nozzle housing 100 .

[0063] The flow path is disposed inside the nozzle housing 100 , a lower end of the flow path may communicate with the suction port 121 , and an upper end of the flow path may be connected to the connection pipe 400 .

[0064] At this time, the flow path connecting the suction port 121 and the connection pipe 400 is formed substantially along the up-down direction. With such a structure, there are advantages that the path for sucking in air containing dust can be minimized and the flow loss can be minimized.

[0065] The nozzle housing 100 has a caster receiving hole 122 formed therein. Specifically, the caster receiving hole 122 is formed on the lower side surface 120 of the nozzle housing 100. The caster receiving hole 122 indicates a space in which at least a part of the caster 124 is exposed to the outside.

[0066] The caster receiving hole 122 may be disposed between the first agitator 200 and the second agitator 300. In addition, the caster receiving hole 122 is disposed as a pair at a predetermined distance on both side ends in the left-right direction of the suction port 121. That is, the pair of caster receiving holes 122 are disposed on both sides of the left-right direction of the lower side surface 120 with the suction port 121 as the center.

[0067] With such a structure, the caster receiving hole 122 arranges the caster 124 between the first agitator 200 and the second agitator 300. Therefore, the following effects are achieved: when an external force is applied during the cleaning operation, the caster 124 can support the nozzle housing 100, and it is possible to prevent an excessive external force from being applied to the first agitator 200 and / or the second agitator 300, thereby preventing an increase in the load applied to the agitator motor (not shown).

[0068] In addition, a distance is provided between the suction port 121 and the caster housing hole 122 , thereby having the advantage of preventing dust flowing toward the suction port 121 from flowing into the caster housing hole 122 .

[0069] The caster receiving hole 122 is formed in a manner that the caster 124 can rotate relative to each other. For example, the caster receiving hole 122 can be formed in a circular or elliptical hole shape. Therefore, even if the caster receiving portion 123 and the caster 124 rotate around a rotation axis perpendicular to the ground, interference with the lower side surface 120 can be prevented.

[0070] The caster housing portion 123 and the caster 124 are rotatably coupled to each other and are relatively rotatable with respect to the lower side surface 120 of the nozzle housing 100 .

[0071] The caster storage part 123 may be disposed in the internal space of the nozzle housing 100. That is, the caster storage part 123 may be disposed in the space formed between the lower side surface 120 and the upper side surface 110 of the nozzle housing 100. At this time, the shaft 123a provided in the caster storage part 123 is rotatably coupled to the nozzle housing 100. The shaft 123a of the caster storage part 123 may be formed in a direction perpendicular to the lower side surface 120. Therefore, with the cleaning machine nozzle 1 placed on the bottom surface as a reference, the caster storage part 123 can rotate around the rotation axis perpendicular to the bottom surface.

[0072] In addition, the caster storage portion 123 may be formed in a manner to store at least a portion of the caster 124. For example, the caster storage portion 123 may be formed with a covering surface 123b formed along a direction perpendicular to the axis 123a (a direction parallel to the lower side surface 120). In addition, the caster storage portion 123 may be formed with a side wall surface 123c extending vertically downward from the above-mentioned covering surface 123b. In addition, the caster shaft 123d constituting the rotation axis of the caster 124 may be combined with the above-mentioned side wall surface 123c. In this case, the caster shaft 123d may be formed along a direction parallel to the extension direction of the lower side surface 120 (a direction parallel to the bottom surface).

[0073] Therefore, according to the present invention, the caster housing 123 can rotate with the rotation axis perpendicular to the bottom surface as a reference. With such a structure, there is an effect that the restriction of the caster 124 in the rolling direction is eliminated.

[0074] Therefore, according to the present invention, no matter the user moves the cleaning machine nozzle 1 in the front-to-back direction, the left-to-right direction, or the diagonal direction, the caster housing 123 can change the rolling direction of the caster 124 while rotating.

[0075] As a result, in the present invention, even if the user pushes or pulls the cleaning machine nozzle 1 in different directions, the caster 124 can change directions and roll along the bottom surface, thereby having an effect of improving the user's operating force.

[0076] The caster 124 is rotatably coupled to the caster housing 123 and is disposed on the lower side surface 120 so as to roll along the bottom surface (ground).

[0077] The lower side surface 120 is provided with a plurality of casters 124. For example, the casters 124 are arranged in a pair at a distance from each other along the left-right direction on the lower side surface 120. In this case, the suction port 121 may be arranged between the pair of shafts.

[0078] Each caster 124 is rotatably coupled to the caster housing portion 123 via a caster shaft 123 d.

[0079] At least a portion of the caster 124 is coupled to the caster housing 123 and is disposed inside the nozzle housing 100. In addition, at least a portion of the caster 124 is exposed to the outside of the nozzle housing 100 through the caster housing hole 122.

[0080] With such a structure, when the cleaning machine nozzle 1 is placed on the bottom surface, the caster 124 can contact the bottom surface. Therefore, when the cleaning machine nozzle 1 is moved by the user's operation, the friction between the nozzle housing 100 and the bottom surface can be reduced, and the mobility of the cleaning machine nozzle 100 can be improved.

[0081] On the other hand, a virtual caster passing surface C may be formed which passes through the rotation centers of the pair of casters and extends in a direction perpendicular to the bottom surface.

[0082] On the other hand, in this embodiment, a foreign matter blocking portion 125 may be further disposed on the outer contour of the caster receiving hole 122 .

[0083] The foreign matter blocking portion 125 is formed into a shape that increases friction or is formed of a material that increases friction. As an example, the foreign matter blocking portion 125 may be formed into a shape that protrudes and forms a plurality of fine protrusions. As another example, the foreign matter blocking portion 125 may be formed of a rubber material. Therefore, the foreign matter blocking portion 125 can block foreign matter from passing through the surface of the foreign matter blocking portion 125.

[0084] The foreign matter blocking portion 125 may be disposed on the lower side surface 120 and may be configured in a shape surrounding at least a portion of the caster receiving hole 122. For example, the foreign matter blocking portion 125 may be formed in a horseshoe shape protruding toward the suction port 121. With such a structure, it is possible to block dust moved by the rotation of the first agitator 200 and the second agitator 300 from flowing into the caster receiving hole 122.

[0085] On the other hand, the connecting pipe joint 130 is formed by protruding and extending from the upper side surface 110. Specifically, based on the state in which the first agitator 200 and the second agitator 300 are in contact with the bottom surface (ground) (the state in which the cleaning machine nozzle 1 is placed on the bottom surface), the connecting pipe joint 130 is formed by protruding and extending from the upper side surface 110 in a direction perpendicular to the bottom surface (a direction perpendicular to the lower side surface 120).

[0086] Specifically, the connection pipe coupling portion 130 is formed to protrude and extend from the inclined surface 113 in a direction perpendicular to the bottom surface (a direction perpendicular to the lower side surface 120 ).

[0087] The connecting pipe joints 130 are formed as a pair in a symmetrical shape on the upper side surface 110. And the connecting pipe 400 can be rotatably coupled between the pair of connecting pipe joints 130. Specifically, the pair of connecting pipe joints 130 can be hingedly coupled to the connecting pipe 400. That is, the pair of connecting pipe joints 130 can each be provided with a hinge axis coupled to the connecting pipe 400, and the connecting pipe 400 can be rotated (pivoted) around the hinge axis.

[0088] At this time, the upper end of the connection pipe joint 130 is arranged farther from the ground than the upper surface of the nozzle housing 100. That is, when the cleaning machine nozzle 1 is placed on the bottom surface, the connection pipe joint 130 is arranged farther from the ground than the upper end of the upper side surface.

[0089] With such a structure, a sufficient angle at which the connection pipe 400 can rotate can be ensured. In addition, the upper side surface 110 is formed to be inclined downward in the direction of the second agitator 300, so when the connection pipe 400 rotates toward the second agitator 300, the connection pipe 400 can be arranged close to the bottom surface (approximately parallel to the bottom surface). Therefore, the overall height of the cleaning machine nozzle 1 can be reduced, which has the advantage of being able to clean low-height areas such as beds and sofas that can be accessed.

[0090] On the other hand, a virtual connection pipe connection surface P may be formed so that a hinge axis for hinge-connecting the connection pipe 400 and the nozzle housing 100 passes in a direction perpendicular to the ground.

[0091] The connection pipe fixing part 140 is formed at the rear side of the nozzle housing 100 and is detachably connected to the connection pipe 400. Specifically, the connection pipe fixing part 140 is formed to protrude from the rear end of the upper side 110 and is connected to the locking part 432 provided on the connection pipe 400.

[0092] For example, the connection pipe fixing portion 140 may be formed to protrude in a hook shape to be inserted and coupled with the locking portion 432 .

[0093] With such a structure, the connection pipe fixing part 140 can combine the nozzle housing 100 and the connection pipe 400. Therefore, the connection pipe 400 coupled to the connection pipe coupling part 130 and the connection pipe fixing part 140 is restricted from rotating (pivoting) in the left and right directions.

[0094] At the same time, the connecting pipe fixing part 140 is coupled to the locking part 432 to release the fixing of the second turning part 430 and the third turning part 440 described later. Specifically, the connecting pipe fixing part 140 is coupled to the locking part 432 to release the combination of the locking part 432 and the third turning part. The fixing and releasing of the second turning part 430 and the third turning part 440 by the locking part 432 will be described later.

[0095] The first agitator 200 is provided in the nozzle housing 100 and plays a role of separating foreign matter from the cleaning object. The first agitator 200 is arranged at the front of the cleaning machine nozzle 1. The first agitator 200 is rotatably coupled to the nozzle housing 100.

[0096] The first agitator 200 is formed in a cylindrical shape and is arranged along the left-right direction of the nozzle housing 100. That is, the longitudinal direction (axial direction) of the first agitator 200 is arranged in a direction intersecting the front-rear direction of the cleaning machine nozzle 1.

[0097] The outer peripheral surface of the first agitator 200 is provided with a brush or a member capable of increasing friction.

[0098] The first agitator 200 may include at least one gear and may receive rotational power from an agitator motor (not shown).

[0099] The first agitator 200 guides external dust and air to the suction port 121 by rotating. The first agitator 200 rotates in a direction in which the outer peripheral surface opposite to the bottom surface moves toward the suction port 121. In other words, the first agitator 200 rotates counterclockwise with respect to the left side of the cleaning machine nozzle 1 when the cleaning machine nozzle 1 is viewed. With such a structure, external dust and air rub against the first agitator 200 and are guided to the direction of the suction port 121.

[0100] On the other hand, the first agitator 200 is replaceably coupled to the nozzle housing 100. Therefore, the first agitator 200 can be replaced and cleaned according to the cleaning environment.

[0101] The second agitator 300 is provided at the nozzle housing 100 and plays a role of separating foreign matter from the cleaning object. The second agitator 300 is arranged at the rear of the cleaning machine nozzle 1. The second agitator 300 is rotatably coupled to the nozzle housing 100.

[0102] The second agitator 300 is formed in a cylindrical shape and arranged along the left-right direction of the nozzle housing 100. That is, the longitudinal direction (axial direction) of the second agitator 300 is arranged in a direction intersecting the front-rear direction of the cleaning machine nozzle 1.

[0103] The outer peripheral surface of the second agitator 300 is provided with a brush or a member capable of increasing friction.

[0104] The second agitator 300 has at least one gear and receives rotational power from a agitator motor (not shown). At this time, the first agitator 200 and the second agitator 300 receive power from a agitator motor. As an example, the first agitator 200 and the second agitator 300 are connected by a belt and receive power from the agitator motor. As another example, the first agitator 200 and the second agitator 300 are connected to each other by at least one gear and receive power from the agitator motor.

[0105] The second agitator 300 guides external dust and air to the suction port 121 by rotating. At this time, the second agitator 300 and the first agitator 200 may rotate in opposite directions.

[0106] That is, the second agitator 300 rotates in a direction in which the outer peripheral surface opposite to the bottom surface moves toward the suction port 121. In other words, the second agitator 300 can rotate in a clockwise direction based on the time when the cleaning machine nozzle 1 is viewed from the left side of the cleaning machine nozzle 1. With such a structure, external dust and air rub against the first agitator 200 and are guided toward the suction port 121.

[0107] With such a structure, dust around the suction port 121 is gathered toward the suction port 121 by the first agitator 200 and the second agitator 300 , and is sucked in by the suction force of the cleaning machine body 2 and removed from the bottom surface.

[0108] On the other hand, the second agitator 300 is replaceably coupled to the nozzle housing 100. Therefore, the second agitator 300 can be replaced according to the cleaning environment to perform cleaning.

[0109] Furthermore, in the cleaning machine nozzle 1 of the present invention, the first agitator 200 and the second agitator 300 are both replaceable, so that various agitator combinations can be formed according to the state of the bottom surface or the cleaning environment, thereby maximizing the cleaning efficiency.

[0110] On the other hand, in the cleaning machine nozzle 1 of the embodiment of the present invention, the diameter of the first agitator 200 is different from the diameter of the second agitator 300. Specifically, the diameter of the first agitator 200 is greater than the diameter of the second agitator 300.

[0111] When the diameter of the first agitator 200 is larger than that of the second agitator 300, the torque of the second agitator 300 having a smaller diameter is smaller than that of the first agitator 200. That is, the rotational power required to rotate the second agitator 300 is smaller than the power used to rotate the first agitator 200.

[0112] Therefore, when the diameter of the second agitator 300 is smaller than the diameter of the first agitator 200 as in the present invention, the motor output required to rotate the two agitators is lower than when two agitators having the same diameter are rotated.

[0113] Therefore, according to the present invention, two agitators can be rotated by one agitator motor (not shown) while reducing the output power required by the motor. Therefore, it has the effect of reducing the power consumed by the cleaning machine nozzle and reducing the load applied to the motor.

[0114] In addition, the diameter of the first agitator 200 is greater than the diameter of the second agitator 300, so that an inclination can be formed on the upper side 110 of the nozzle housing 100 covering the upper part of the first agitator 200 and the second agitator 300. That is, when the first agitator 200 and the second agitator 300 are placed on the bottom surface (ground), the height of the upper end of the first agitator 200 is higher than the height of the upper end of the second agitator 300, and a height difference is also generated in the nozzle housing 100 covering them, and an inclination connecting them is formed. That is, the first agitator cover 111 covering the vertical upper side of the first agitator 200, the second agitator cover 112 covering the vertical upper side of the second agitator 300, and the inclined surface 113 connecting the first agitator cover 111 and the second agitator cover 112 are formed on the upper side 110 of the nozzle housing 100 of the present invention.

[0115] With such a structure, when the connecting pipe 400 rotates toward the second agitator 300, the position where the connecting pipe 400 and the nozzle housing 100 meet can be lowered. Therefore, the present invention has the following effects: the connecting pipe 400 can be laid close to the ground to reduce the overall height of the cleaning machine nozzle 1.

[0116] on the other hand, Figure 6 A diagram for explaining the positional relationship between a virtual caster passing surface, a virtual agitator passing surface, and a virtual connecting pipe connecting surface in a cleaning machine nozzle according to an embodiment of the present invention is shown.

[0117] Reference Figure 6 In this embodiment, a virtual agitator passing surface A is formed which passes through the rotation axis (rotation center) of the second agitator 300 in a direction perpendicular to the bottom surface (ground).

[0118] Next, the arrangement relationship between the agitator passing surface A, the connecting pipe connecting surface P, and the caster passing surface C and the effects thereof will be described.

[0119] In the cleaning machine nozzle 1 of one embodiment of the present invention, the connecting pipe connection surface P is arranged between the caster passing surface C and the agitator passing surface A.

[0120] Here, the connection pipe connection surface P may be a virtual surface extending the point where the connection pipe joint portion 130 and the connection pipe 400 are connected to each other in a direction perpendicular to the ground. In other words, based on the state where the cleaning machine nozzle 1 is placed on the ground (bottom surface), the connection pipe connection surface P may be a virtual surface extending in a direction perpendicular to the ground through the first steering axis X.

[0121] When the user operates the cleaning machine body 2, the extension tube 3 and the connection tube 400 can press or pull up the nozzle housing 100 as the user pushes and pulls the cleaning machine body 2. At this time, the user's pressing operation force is transmitted to the nozzle housing 100 through the extension tube 3 and the connection tube 400, and the nozzle housing 100 moves on the bottom surface (ground) by the user's operation force.

[0122] At this time, the user's operating force is applied through the point where the connection pipe joint portion 130 and the connection pipe 400 are connected to each other, and is applied downward in a direction perpendicular to the ground along the connection pipe joint portion 130 to be transmitted to the nozzle housing 100. That is, the connection pipe connection surface P indicates the position and direction where the user's operating force is applied.

[0123] On the other hand, the caster passing surface C may be a virtual surface formed along a direction perpendicular to the ground through the rotation center of the pair of casters 124. Such a caster passing surface C may be a virtual surface formed along a direction perpendicular to the ground through the point where the pair of casters 124 contact the bottom surface (ground).

[0124] Therefore, the caster passing surface C can indicate the position and direction in which the cleaning machine nozzle 1 presses the bottom surface due to the load of the cleaning machine nozzle 1 and the operation force of the user.

[0125] On the other hand, the agitator passing surface A may be a virtual surface extending in a direction perpendicular to the ground through the rotation axis of the second agitator. Such agitator passing surface A may be a virtual surface formed in a direction perpendicular to the ground through a line of the second agitator 300 contacting the bottom surface (ground).

[0126] Therefore, the agitator passing surface A can indicate the position and direction in which the cleaner nozzle 1 presses the bottom surface due to the load of the cleaner nozzle 1 and the operation force of the user.

[0127] Therefore, the connection pipe connection surface P is arranged between the caster passing surface C and the agitator passing surface A, so the pressing force (operation force) of the user is applied to the caster 124 and the second agitator 300 .

[0128] With such a structure, when the cleaning machine nozzle 1 is pressed downward by the user's operating force, the caster 124 and the second agitator 300 are pressed toward the ground, which can relatively reduce the friction between the first agitator 200 and the ground. Therefore, it has the effect of preventing a large load on the agitator motor due to the friction between the first agitator 200 and the ground.

[0129] On the other hand, when the caster 124 and the second agitator 300 are pressed toward the ground, the second agitator 300 may receive smaller frictional resistance with the ground than the first agitator 200 .

[0130] Specifically, the first agitator 200 and the second agitator 300 obtain the same torque from one agitator motor. At this time, when the diameter of the first agitator 200 is larger than the diameter of the second agitator 300, the torque generated by the friction between the first agitator 200 and the ground is larger than the torque generated by the friction between the second agitator 300 and the ground.

[0131] For example, when the friction force (F1) between the first agitator 200 and the ground is the same as the friction force (F2) between the second agitator 300 and the ground (F1=F2), the distance (r1) between the rotation center of the first agitator 200 and the ground is greater than the distance between the rotation center r2 of the second agitator 300 and the ground (r1>r2), and therefore the torque (r1#F1) generated by the friction between the first agitator 200 and the ground is greater than the torque (r2#F2) generated by the friction between the second agitator 300 and the ground.

[0132] Therefore, if the first agitator 200 rubs against the ground, the second agitator 300 rotates even in a condition where the rotation is stopped.

[0133] Therefore, according to the present invention, the diameter of the second agitator 300 is made smaller than the diameter of the first agitator 200, and the second agitator 300 is pressed by the operating force of the user, thereby rotating the second agitator 300 even when cleaning a bottom surface with a large friction force such as a mat or a carpet. Therefore, the cleaning machine nozzle 1 of the present invention can also easily move forward or backward on a bottom surface such as a mat or a carpet, and can prevent an overload from being applied to the agitator motor.

[0134] Figure 7 A diagram for explaining the turning direction of a connecting pipe in a nozzle of a cleaning machine according to an embodiment of the present invention is shown. Figure 8 A bottom view for explaining a connecting pipe in a nozzle of a cleaning machine according to an embodiment of the present invention is shown. Fig. 9 A partial enlarged view for explaining a locking portion and a connecting pipe coupling portion in a cleaning machine nozzle according to an embodiment of the present invention is shown. Fig.10A side view is shown for explaining a state in which a locking portion and a connecting pipe coupling portion are coupled in a cleaning machine nozzle according to an embodiment of the present invention.

[0135] Reference Figures 7 to 10 , a connecting pipe 400 according to an embodiment of the present invention is described as follows.

[0136] The connection pipe 400 forms a flow path communicating with the suction port 121 , and connects the nozzle housing 100 and the extension pipe 3 or the nozzle housing 100 and the cleaning machine body 2 .

[0137] The connecting pipe 400 includes a pipe 410 , a first turning portion 420 , a second turning portion 430 , and a third turning portion 440 .

[0138] The tube 410 may have a flow path formed therein that communicates with the suction port 121. The tube 410 is coupled to the nozzle housing 100 and may communicate with the flow path inside the nozzle housing 100.

[0139] The tube 410 is formed of a deformable material. Specifically, the tube 410 is formed of a bendable material. Therefore, the tube 410 is bent and deformed according to the rotation of the first turning portion 420, the second turning portion 430, and the third turning portion 440 of the connection tube 400.

[0140] The first deflection portion 420 accommodates at least a portion of the tube 410 therein and is hingedly coupled to the nozzle housing 100 .

[0141] The first turning portion 420 is formed in a hollow shape, with the tube 410 passing through the interior, one side of which is hingedly connected to the connecting tube connecting portion 130 , and the other side of which is hingedly connected to the second turning portion 430 .

[0142] At this time, the axis about which the first turning portion 420 rotates is arranged in a direction parallel to the bottom surface (ground) relative to the connection pipe coupling portion 130 .

[0143] With such a structure, when the user places the cleaning machine nozzle 1 on the bottom surface and lifts or lowers the cleaning machine body 2, the cleaning machine body 2 and the connecting pipe 400 can rotate around the hinge axis.

[0144] In addition, the direction of the hinge axis (hereinafter referred to as the 'first steering axis (X)') connecting the first steering portion 420 and the connecting pipe coupling portion 130 and the direction of the hinge axis (hereinafter referred to as the 'second steering axis (Y)') connecting the first steering portion 420 and the second steering portion 430 may be perpendicular to each other.

[0145] With such a structure, when the user places the cleaning machine nozzle 1 on the bottom surface and moves the cleaning machine body 2 to the left and right, the cleaning machine body 2 and the connecting pipe 400 can rotate around the second steering axis.

[0146] The direction in which the first turning portion 420 rotates (pivots) relative to the nozzle housing 100 can intersect with the direction in which the second turning portion 430 rotates relative to the first turning portion 420. Therefore, the cleaning machine nozzle 1 of the present invention has the advantage that the connecting tube 400 can be bent at various angles by combining the rotation directions of the first turning portion 420 and the second turning portion 430.

[0147] The second steering portion 430 is hingedly coupled to the first steering portion 420 and is relatively rotatably coupled to the third steering portion 430 .

[0148] Specifically, the second turning portion 430 is formed in a hollow shape so that the tube 410 can pass through the inside, one side of the second turning portion 430 is hingedly connected to the first turning portion 420, and the other side of the second turning portion 430 is relatively rotatably connected to the third turning portion 440.

[0149] The second turning portion 430 is provided with a locking portion 431. The locking portion 431 is fixedly coupled to the second turning portion 430 and inserted into the third turning portion 440 for coupling with the linear movement. For example, the locking portion 431 includes a plate-shaped stopper 431a which is inserted into the third turning portion 440 by the linear movement. The stopper 431a is arranged at a position that can be coupled to the connecting pipe fixing portion 140.

[0150] The stopper 431a is released from the third turning portion 430 according to the position of the connecting tube 400. When the connecting tube 400 is not rotated to a specific position, the stopper 431a is configured to protrude in the direction of the third turning portion 430. In addition, when the stopper 431a is engaged with the connecting tube fixing portion 140 according to the rotation of the connecting tube 400, the stopper 431a is pulled toward the nozzle housing 100 and released from the third turning portion 430. On the other hand, the stopper 431a is connected to a spring (not shown) and can be restored to the direction of the third turning portion 430 when the connection between the connecting tube fixing portion 140 and the stopper 431a is released.

[0151] The third turning portion 440 is rotatably coupled to the second turning portion 430. For example, the third turning portion 440 is formed in a tube-like shape, and the inner circumferential surface of one side of the third turning portion 440 receives the other end of the second turning portion 430 and is coupled. At this time, a protrusion is formed at the other end of the second turning portion 430, so that the second turning portion 430 and the third turning portion 440 can be prevented from being separated.

[0152] The third steering portion 440 rotates with the other end of the second steering portion 430 as the rotation axis. At this time, the rotation axis of the third steering portion 440 (hereinafter referred to as the 'third steering axis (Z)') may be perpendicular to the direction of the first steering axis (X) and the direction of the second steering axis (Y).

[0153] With such a structure, when the user places the cleaning machine nozzle 1 on the bottom surface and rotates the cleaning machine body 2, the third steering part 440 rotates. Thus, when cleaning a narrow space such as the bottom of a bed or furniture where the cleaning machine nozzle can enter, the user can lay down the cleaning machine body 2 in a prone position to clean the bottom surface.

[0154] As a result, the connection pipe 400 of the present invention can be rotated through three rotation axes and can be bent at various angles for convenient operation by the user.

[0155] The other side of the third deflection portion 440 is detachably coupled to the extension pipe 3 or the cleaning machine body 2 .

[0156] The third turning portion 440 forms a flow path through which air can flow. As an example, the third turning portion 440 can accommodate the tube 410 therein. As another example, the third turning portion 440 forms a space communicating with the tube 410 therein.

[0157] The third turning portion 440 is formed with a stopper receiving portion (not shown) for the stopper 431a to be inserted into. For example, although not shown, the stopper receiving portion (not shown) may be formed in a square groove shape to receive the plate-shaped stopper 431a.

[0158] When the stopper 431 a is engaged with the stopper receiving portion (not shown), the relative rotation of the third turning portion 440 with respect to the second turning portion 430 is restricted.

[0159] With such a structure, even if the user turns the cleaning machine body 2 at a position where the third deflection portion 440 does not need to rotate, the third deflection portion 440 does not rotate and the cleaning machine nozzle 1 as a whole does not rotate.

[0160] The present invention has been described in detail above through specific embodiments, but this is only used to specifically illustrate the present invention and the present invention is not limited thereto. It is obvious that those skilled in the art can modify or improve the present invention within the technical concept of the present invention.

[0161] Simple deformation and modification of the present invention are all included in the field of the present invention, and the specific protection scope of the present invention can be clearly understood through the attached claims.

Claims

1. A cleaning machine nozzle, characterized in that: It includes: Nozzle housing; A first agitator rotatably coupled to the nozzle housing; a second agitator rotatably coupled to the nozzle housing; a suction port formed between the first agitator and the second agitator to allow air containing dust to flow in; and a connecting pipe having a flow path connected to the suction port, The diameter of the first stirrer is different from the diameter of the second stirrer. The upper side surface of the nozzle housing is formed to be inclined at a predetermined angle to the ground, based on a state in which the first agitator and the second agitator are in contact with the ground.

2. The cleaning machine nozzle according to claim 1, characterized in that: The diameter of the first agitator is greater than the diameter of the second agitator.

3. The cleaning machine nozzle according to claim 1, characterized in that: The cleaning machine nozzle further includes casters, which are arranged between the first agitator and the second agitator and are arranged at predetermined intervals at both side ends in the longitudinal direction of the suction port.

4. The cleaning machine nozzle according to claim 3, characterized in that: The cleaning machine nozzle also includes a caster storage portion, which can be rotatably combined with the caster. The caster housing portion is rotatable relative to the lower side surface of the nozzle housing.

5. The cleaning machine nozzle according to claim 3, characterized in that: include: A virtual caster passing surface, which passes through the rotation centers of the pair of casters in a vertical direction; a virtual agitator passing plane which passes through the rotation axis of the second agitator in a vertical direction; and a virtual connecting pipe connection surface, through which a hinge axis for hinge-joining the connecting pipe and the nozzle housing passes in a vertical direction, The connecting pipe connection surface is arranged between the caster passing surface and the agitator passing surface.

6. The cleaning machine nozzle according to claim 1, characterized in that: The first agitator and the second agitator rotate in opposite directions.

7. The cleaning machine nozzle according to claim 1, characterized in that: include: The connecting pipe joint part is formed on the upper side of the nozzle housing and protrudes in a direction perpendicular to the ground, based on the state in which the first agitator and the second agitator contact the ground, and is hingedly connected to the connecting pipe.

8. The cleaning machine nozzle according to claim 7, characterized in that: Based on a state in which the first agitator and the second agitator are in contact with the ground, an upper end portion of the connection pipe joint portion is arranged farther from the ground than an upper surface of the nozzle housing.

9. The cleaning machine nozzle according to claim 7, characterized in that: The connecting pipe comprises: a pipe having a flow path formed therein and communicating with the suction port; a first turning portion, which receives at least a portion of the tube and is hingedly connected to the nozzle housing; A second steering portion, which is hingedly connected to the first steering portion; and A third steering portion is rotatably coupled to the second steering portion. The second turning portion comprises: A locking portion is coupled to the third steering portion to restrict rotation of the third steering portion.

10. The cleaning machine nozzle according to claim 9, characterized in that: The cleaning machine nozzle further comprises a connecting pipe fixing portion, which is formed at the rear side of the nozzle housing and is connected to the locking portion to release the combination of the locking portion and the third deflection portion.

11. The cleaning machine nozzle according to claim 10, characterized in that: When the locking portion is coupled to the connecting pipe fixing portion, based on a state in which the first agitator and the second agitator are in contact with the ground, at least a portion of the connecting pipe is disposed closer to the ground than an upper end portion of the first agitator.

Images