Cleaner nozzle

Abstract

The present invention relates to a cleaner nozzle comprising: a nozzle housing having a suction port formed on the lower surface thereof; a first agitator rotatably coupled to the nozzle housing; a second agitator rotatably coupled to the rear of the suction port; and a second agitator link having one side coupled to the nozzle housing and the other side coupled to a rotary shaft of the second agitator, thereby maintaining a constant gap between the nozzle housing and the ground to maintain suction efficiency.

Description

Vacuum cleaner nozzle {NOZZLE FOR CLEANER}

[0001] The present invention relates to a vacuum cleaner nozzle, and more particularly, to a vacuum cleaner nozzle that sucks up dust from a floor surface by rotating two agitators.

[0002]

[0003] A vacuum cleaner is a device that uses the suction power generated by a suction motor installed inside the body of the vacuum cleaner to suck in dust and air, separate the dust from the air, and collect it.

[0004] The suction nozzle refers to the part that touches the floor and directly sucks up dust and air. The suction power generated by the suction motor mounted inside the vacuum cleaner body is transmitted to the suction motor, which then draws dust and air into the suction nozzle.

[0005] An agitator is installed in the suction nozzle. The agitator rotates to scrape away dust from the floor or carpet, improving cleaning performance.

[0006] Meanwhile, Korean Patent Publication No. KR2022-0073810A discloses a vacuum cleaner head having a front agitator and a rear agitator.

[0007] The above cleaner head has a suction chamber between a front agitator and a rear agitator, and the front agitator and the rear agitator can rotate in opposite directions to guide dust into the suction chamber.

[0008] However, the aforementioned vacuum cleaner head has identical front and rear agitators, making it impossible to lay the vacuum cleaner body and pipe close to the ground. Consequently, the vacuum cleaner head is limited in its ability to clean deep areas beneath low furniture, such as sofas or beds.

[0009] In addition, the above-mentioned vacuum cleaner head has a limitation in that it requires relatively high motor output and consumes a lot of power because it must rotate two agitators of the same diameter, so that power is distributed evenly across the two agitators.

[0010] Additionally, if the vacuum cleaner head is pressurized by the weight of the vacuum cleaner body or the user's operating force during the cleaning process, the two agitators with the same output and rotating in opposite directions may come into contact with the floor, increasing friction and causing the agitator rotation to stop. In this case, a large load is applied to the motor, potentially causing it to break.

[0011]

[0012] The present invention was created to improve the problems of the conventional vacuum cleaner nozzles as described above, and its purpose is to provide a vacuum cleaner nozzle in which the vacuum cleaner body and the pipe connecting the vacuum cleaner body and the vacuum cleaner nozzle can be laid close to the ground.

[0013] Additionally, the purpose is to provide a vacuum cleaner nozzle capable of lowering the required motor output while rotating two agitators.

[0014] In addition, the purpose is to provide a vacuum cleaner nozzle that can prevent a large load from being applied to the motor due to friction between the agitator and the ground even when the vacuum cleaner nozzle is pressed downward during the cleaning process.

[0015] In addition, the purpose is to provide a vacuum cleaner nozzle that can maintain suction efficiency through a configuration that maintains a constant gap between the nozzle housing and the ground.

[0016]

[0017] In order to achieve the above-described purpose, a cleaner nozzle according to the present invention may include: a nozzle housing having a suction port formed on a lower surface; a first agitator rotatably coupled to the nozzle housing; a second agitator rotatably coupled to a rear portion of the suction port; and a second agitator link having one end coupled to the nozzle housing and the other end coupled to a rotational axis of the second agitator.

[0018] Additionally, it may include a torsion spring coupled to one side of the second agitator link and applying a restoring force to the rotation of the second agitator link.

[0019] Additionally, the second agitator link may include a link body; and a support portion protruding from the link body and supporting an arm of the torsion spring.

[0020] Meanwhile, the nozzle housing includes a side wall covering both longitudinal sides of the second agitator, and a guide hole for limiting the up-and-down movement of the second agitator may be formed in the side wall.

[0021] Meanwhile, the second agitator includes a suction path forming surface surrounding at least a portion of the suction path forming surface, and the gap between the lower end of the suction path forming surface and the ground may be greater than 2.0 mm and less than 5.0 mm.

[0022] Alternatively, the second agitator comprises a suction path forming surface surrounding at least a portion of the second agitator, wherein the second agitator can move away from the ground when the lower end of the suction path forming surface approaches the ground.

[0023] Alternatively, the second agitator may move away from the upper portion of the suction path forming surface when the lower portion of the suction path forming surface is away from the ground.

[0024] The above second agitator can maintain contact with the ground.

[0025] Meanwhile, a sealing member surrounding an area in which the second agitator link rotates on the side wall may be included.

[0026] In addition, the side wall includes a gear coupling portion in which a gear that applies power to the first agitator is coupled; and a link receiving portion including an area in which the second agitator link rotates; and the sealing member can partition the gear coupling portion and the link receiving portion.

[0027] Meanwhile, the diameter of the first agitator may be larger than the diameter of the second agitator.

[0028] Additionally, the diameter of the first agitator may be at least twice the diameter of the second agitator.

[0029]

[0030] As described above, according to the vacuum cleaner nozzle of the present invention, the diameters of the two agitators are configured differently so that an inclined surface can be formed on the upper surface of the nozzle housing, thereby allowing the pipe to be laid toward the agitator with a smaller diameter, lowering the overall height of the vacuum cleaner nozzle and keeping the pipe close to the ground. Therefore, there is an effect that allows the vacuum cleaner nozzle to be pushed deep into furniture with a low lower space to clean it.

[0031] Additionally, by varying the diameters of the two agitators, the torque applied to the smaller agitator can be reduced, thereby lowering the output required by the motor. This, in turn, has the effect of reducing the amount of power consumed by the vacuum cleaner nozzle.

[0032] When the vacuum cleaner nozzle is pressed downward, the caster and the second agitator are strongly pressed against the ground, which can reduce the increase in friction between the first agitator and the ground. Accordingly, there is an effect of preventing a large load from being applied to the motor due to friction between the first agitator and the ground.

[0033] In addition, by maintaining a constant distance between the nozzle housing and the ground, there is an effect of preventing negative pressure loss around the suction port and maintaining suction efficiency.

[0034]

[0035] FIG. 1 is a perspective view illustrating a vacuum cleaner according to one embodiment of the present invention.

[0036] FIG. 2 is a perspective view illustrating a vacuum cleaner nozzle according to one embodiment of the present invention.

[0037] Figure 3 is a bottom view of Figure 1.

[0038] Figure 4 is a cross-sectional view of Figure 3.

[0039] FIG. 5 is an exploded view illustrating a side wall of a vacuum cleaner nozzle according to one embodiment of the present invention.

[0040] FIG. 6 is an enlarged view illustrating a second agitator link of a vacuum cleaner nozzle according to one embodiment of the present invention.

[0041] FIG. 7a is a drawing showing a second agitator link according to one embodiment of the present invention rotating in one direction.

[0042] FIG. 7b is a drawing showing a second agitator link according to one embodiment of the present invention rotated in a different direction.

[0043]

[0044] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0045] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. This is not intended to limit the invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0046]

[0047] FIG. 1 is a perspective view illustrating a cleaner according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a cleaner nozzle according to an embodiment of the present invention. FIG. 3 is a bottom view illustrating FIG. 1. FIG. 4 is a cross-sectional view illustrating FIG. 3. FIG. 5 is an exploded view illustrating a side wall of a cleaner nozzle according to an embodiment of the present invention. FIG. 6 is an enlarged view illustrating a second agitator link of a cleaner nozzle according to an embodiment of the present invention. FIG. 7A is a view illustrating a state in which a second agitator link according to an embodiment of the present invention rotates in one direction. FIG. 7B is a view illustrating a state in which a second agitator link according to an embodiment of the present invention rotates in another direction.

[0048]

[0049] Referring to FIGS. 1 to 7, the vacuum cleaner nozzle (1) of the present invention is described as follows.

[0050] The vacuum cleaner nozzle (1) of this embodiment can be used by being connected to, for example, a handheld vacuum cleaner or a canister-type vacuum cleaner.

[0051] Additionally, in this specification, “ground” may be understood to mean not only the floor surface of a living room or room, but also a clean surface such as a carpet.

[0052] That is, the cleaner nozzle (1) can be detachably connected to the cleaner body (2) or the connecting pipe (3). As the cleaner nozzle (1) is connected to the cleaner body (2) or the connecting pipe (3), the user can clean the floor using the cleaner nozzle (1). At this time, the cleaner body (2) to which the cleaner nozzle (1) is connected can separate dust in the air in a multi-cyclone manner.

[0053] The vacuum cleaner nozzle (1) can be operated by receiving power from the vacuum cleaner body (2). Specifically, the vacuum cleaner nozzle (1) can be operated by receiving power from a battery (not shown) provided in the vacuum cleaner body (2).

[0054] The vacuum cleaner body (2) to which the vacuum cleaner nozzle (1) is connected includes a suction motor (not shown), so that the suction force generated by the suction motor (not shown) can be applied to the vacuum cleaner nozzle (1).

[0055] Therefore, in this embodiment, the cleaner nozzle (1) can perform the role of sucking in foreign substances and air from the floor surface and guiding them to the cleaner body (2).

[0056] A vacuum cleaner nozzle (1) according to one embodiment of the present invention includes a nozzle housing (100), a side cover (200), a first agitator (300), and a second agitator module (400).

[0057] For reference, the direction used in the present invention is explained as follows.

[0058] In the present invention, the direction of the cleaner nozzle (1) can be defined based on the suction port (121). Specifically, the direction in which the first agitator (300) is arranged based on the suction port (121) can be referred to as the front of the cleaner nozzle (1), and the direction in which the second agitator (410) is arranged based on the suction port (121) can be referred to as the rear of the cleaner nozzle (1). In addition, based on the state in which the cleaner nozzle (1) is placed on the floor (ground) (the state in which the first agitator (300) and the second agitator (410) are in contact with the floor), the direction away from the ground can be referred to as upward (upper side), and the direction approaching the ground can be referred to as downward (lower side).

[0059] The nozzle housing (100) may include an upper surface (110), a lower surface (120), and a pair of opposing side walls (130). Components of the cleaner nozzle (1) may be accommodated in the space surrounded by the upper surface (110), the lower surface (120), and the pair of side walls (130).

[0060] The nozzle housing (100) may be equipped with a first agitator (300) and a second agitator (410) and may form the outer shape of a cleaner nozzle (1). In addition, a connecting pipe (3) may be coupled to the nozzle housing (100). The nozzle housing (100) may accommodate an agitator motor (not shown). A gear and a second agitator link (430) may be coupled to the nozzle housing (100). Side covers (200) may be coupled to both sides of the nozzle housing (100).

[0061]

[0062] The upper surface (110) may include a first agitator cover portion (111) that surrounds at least a portion of the first agitator (300) and a connecting tube coupling portion (112) to which the connecting tube (3) is coupled.

[0063] The first agitator cover (111) may be formed to cover the upper or front side of the first agitator (300). A front guide surface (122) may be coupled to the front lower part of the first agitator (300).

[0064] And, the connecting pipe joint (112) can be placed at the rear of the first agitator cover (111).

[0065] In addition, the connecting pipe joint (112) may include a joint (112a) into which the connecting pipe (3) is inserted and a motor receiving portion (112b) into which an agitator motor (not shown) is received.

[0066] A connecting pipe (3) can be connected to the connecting portion (112a). The connecting portion (112a) can be formed to protrude and extend from the upper surface (110). Specifically, based on a state in which the first agitator (300) and the second agitator (410) are in contact with the floor surface (ground) (a state in which the cleaner nozzle (1) is placed on the floor surface), the connecting pipe connecting portion (112) can be formed to protrude and extend from the upper surface (110) in a direction perpendicular to the floor surface (a direction perpendicular to the lower surface (120).

[0067] The motor receiving portion (112b) may be positioned adjacent to the coupling portion (112a). The motor receiving portion (112b) may be positioned between the side wall (130) and the coupling portion (112a). The motor receiving portion (112b) may accommodate an agitator motor (not shown). The agitator motor (not shown) may be connected to a gear positioned on the side wall (130) to apply power to the first agitator (300).

[0068]

[0069] Based on the state in which the first agitator (300) and the second agitator (410) are in contact with the floor surface (ground), the upper surface (110) of the nozzle housing (100) can be formed to be inclined at a predetermined angle with the ground.

[0070] Specifically, based on the state in which the first agitator (300) and the second agitator (410) are in contact with the floor surface (ground), the upper surface (110) may be formed such that one side where the first agitator (300) is placed is further from the ground than the other side where the second agitator (410) is placed.

[0071]

[0072] The nozzle housing (100) may include a lower surface (120) on which a first agitator (300) and a second agitator (410) are arranged.

[0073] At this time, the lower surface (120) can be placed to face the ground while the nozzle housing (100) is placed on the floor surface (ground).

[0074] A suction port (121) may be formed in the nozzle housing (100). Specifically, a suction port (121) may be formed in the lower surface (120) of the nozzle housing (100). The suction port (121) refers to a space through which air containing dust can be introduced. With this configuration, when the suction motor (not shown) of the cleaner body (2) is operated, dust and air existing around the ground can be sucked into the flow path of the cleaner nozzle (1) through the suction port (121).

[0075] Inside the nozzle housing (100), a printed circuit board (not shown) for controlling an agitator motor (not shown) may be installed.

[0076] Additionally, a path may be formed in the nozzle housing (100) that communicates with the suction port (121) and guides air flowing in from the suction port (121) to the cleaner body (2).

[0077] At this time, the suction path forming surface (420) to be described later may be placed between the suction port (121) and the second agitator (410) to form a portion of the space where air is sucked in. That is, the air may be sucked in along the suction path forming surface (420) and flow into the cleaner body (2).

[0078] The euro can be placed inside the nozzle housing (100), the lower end of the euro can be connected to the suction port (121), and the upper end of the euro can be connected to the connecting pipe (3).

[0079] At this time, the flow path connecting the suction port (121) and the connecting pipe (3) can be formed approximately along the vertical direction. With this configuration, the path through which air containing dust is sucked can be minimized, and there is an advantage in that the loss of flow rate can be minimized.

[0080]

[0081] A front guide surface (122) may be formed on the nozzle housing (100). The front guide surface (122) may be formed on the lower surface (120) of the nozzle housing (100). The front guide surface (122) may be positioned at the front lower portion of the nozzle housing (100). The front guide surface (122) may be the part that first covers the upper portion of dust in the driving direction when the cleaner moves forward.

[0082] The front guide surface (122) may have a downward slope from the front to the rear end. The lower end of the front guide surface (122) may be arranged to be spaced apart from the ground. For example, the gap between the lower end of the front guide surface (122) and the ground may be 2.0 mm or less. The rear end of the front guide surface (122) may be formed closer to the ground than the front. The front guide surface (122) may be formed so that the gap from the ground becomes narrower as it goes from the front toward the suction port (121).

[0083] Meanwhile, the front guide surface (122) can be elastically deformed by being supported by a foreign substance located on the ground. For example, the front guide surface (122) can be formed of an elastic material. Alternatively, the front guide surface (122) can be formed so that the thickness becomes thinner toward the lower portion. Accordingly, even if the size of the foreign substance is larger than 2.0 mm during forward movement, it can pass through the lower portion of the front guide surface (122). Through this configuration, the front guide surface (122) can form a surface pressure. That is, the front guide surface (122) can improve the suction power of the cleaner. In addition, the front guide surface (122) can prevent dust from escaping to the front of the cleaner nozzle (1).

[0084]

[0085] Meanwhile, a caster receiving portion (122a) may be formed on the lower surface (120) of the nozzle housing (100). The caster receiving portion (122a) may mean a space that can expose at least a portion of the caster (123) to the outside.

[0086] Specifically, the caster receiving portion (122a) may be formed on the front guide surface (122). The caster receiving portion (122a) may be arranged in front of the first agitator (300). In addition, the caster receiving portions (122a) may be arranged in pairs at a predetermined distance from the left and right ends of the front guide surface (122).

[0087] With this configuration, the caster (123) can be placed in front of the first agitator (300). Therefore, when an external force is applied during a cleaning operation, the caster (123) can support the nozzle housing (100), and there is an effect of preventing excessive external force from being applied to the first agitator (300) and / or the second agitator (410), thereby preventing the load applied to the agitator motor (not shown) from increasing.

[0088] The caster receiving portion (122a) is rotatably coupled to the caster (123) and can be provided to be rotatable relative to the lower surface (120) of the nozzle housing (100).

[0089] Additionally, the caster receiving portion (122a) may be formed in a shape capable of receiving at least a portion of the caster (123). The caster receiving portion (122a) may be formed in a shape that surrounds both sides of the caster (123) at a constant interval.

[0090] The caster receiving portion (122a) may further include a shaft. The shaft may be rotatably coupled to the nozzle housing (100). The shaft may be disposed in the internal space of the nozzle housing (100). That is, the shaft may be disposed in the space formed between the lower surface (120) and the upper surface (110) of the nozzle housing (100).

[0091] The shaft (123a) can be formed along a direction perpendicular to the lower surface (120). Therefore, when the cleaner nozzle (1) is placed on the floor, the caster (123) can rotate around a rotation axis perpendicular to the ground.

[0092] Accordingly, according to the present invention, the caster (123) can rotate around a rotation axis perpendicular to the ground. With this configuration, there is no restriction on the direction in which the caster (123) can move.

[0093] In addition, the direction in which the caster (123) can roll can be changed not only when the user moves the vacuum cleaner nozzle (1) forward and backward, but also when the user moves it left and right or diagonally. Accordingly, there is an effect of improving the user's operating ability.

[0094]

[0095] The caster (123) is rotatably connected to the caster receiving portion (122a) and is placed on the lower surface (120) so as to roll along the floor surface (ground).

[0096] A plurality of casters (123) may be provided on the lower surface (120). For example, the casters (123) may be arranged in pairs spaced apart from each other in the left and right directions on the lower surface (120). Each caster (123) may be rotatably coupled to the nozzle housing (100) by a caster shaft (123d).

[0097] At least a portion of the caster (123) may be arranged inside the nozzle housing (100) in combination with the caster receiving portion (122a). Additionally, at least a portion of the caster (123) may be exposed to the outside of the nozzle housing (100).

[0098] With this configuration, when the cleaner nozzle (1) is placed on the ground, the caster (123) can come into contact with the ground. Therefore, when the cleaner nozzle (1) is moved by the user's operation, the friction between the nozzle housing (100) and the ground can be reduced, and the mobility of the cleaner nozzle (1) can be improved.

[0099] The caster (123) may be placed at the front lower portion of the nozzle housing (100). When the cleaner nozzle (1) is placed on the ground, the front end of the caster (123) may be placed to protrude further forward than the front end of the nozzle housing (100).

[0100] The caster (123) can act as a support point while maintaining contact with the ground when the rear portion of the cleaner nozzle (1) is raised while in contact with the ground. This reduces the friction between the nozzle housing (100) and the ground while the rear portion of the cleaner nozzle (1) is raised, thereby enabling driving.

[0101]

[0102] The nozzle housing (100) may include a pair of opposing side walls (130). The pair of side walls (130) may be arranged in a direction perpendicular to the ground when the cleaner nozzle (1) is placed on the ground. The pair of side walls (130) may be formed on both sides of the nozzle housing (100) to form a space for accommodating the first agitator (300) and the second agitator (410). The side walls (130) may be covered by the side cover (200). That is, the side walls (130) may be arranged between the first agitator (300) or the second agitator (410) and the side cover (200). The side walls (130) may be formed to cover both longitudinal sides of the second agitator (410).

[0103] A gear (131a) and a second agitator link (430) may be arranged on the side wall (130). Specifically, the gear (131a) and the second agitator link (430) may be coupled to the outer surface of the side wall (130) facing the side cover (200). In addition, an insertion groove (132b) into which a sealing member (450) is inserted may be formed on the outer surface of the side wall (130). On the other hand, a first agitator (300) and an agitator motor (not shown) may be coupled to the inner surface disposed toward the inside of the nozzle housing (100).

[0104]

[0105] The side wall (130) may include a gear coupling portion (131) and a link coupling portion (132).

[0106] A gear (131a) can be coupled to the gear coupling portion (131). A first agitator (300) and an agitator motor (not shown) can be coupled to the inner surface of the gear coupling portion (131).

[0107] A second agitator link (430) can be coupled to the link coupling portion (132). Specifically, one side of the second agitator link (430) can be rotatably coupled to the link coupling portion (132).

[0108] A guide hole (132a), an insertion groove (132b), and a fixed support portion (132c) can be formed in the link joint (132).

[0109] First, a guide hole (132a) may be formed in the link coupling portion (132). That is, a guide hole (132a) may be formed in the side wall (130). The guide hole (132a) may be formed in the shape of a groove having a constant width and length in the side wall (130). At this time, the guide hole (132a) may guide the up and down movement of the other side of the second agitator link (430). In addition, the guide hole (132a) may limit the rotational movement of the second agitator link (430). Accordingly, while the second agitator (410) moves up and down, its movement path may be physically limited by the wall surface of the guide hole (132a). The link coupling portion (132) may be communicated with the outside through the guide hole (132a).

[0110] An insertion groove (132b) may be formed in the link connecting portion (132) surrounding the rotation radius of the second agitator link (430). A sealing member (450) to be described later may be inserted into the insertion groove (132b). Meanwhile, the side cover (200) may include a cover protrusion (not shown) to be inserted into the insertion groove (132b). The shape of the cover protrusion (not shown) may be formed to correspond to the shape of the insertion groove (132b).

[0111] That is, when the side cover (200) is coupled to the nozzle housing (100), the cover protrusion (not shown) can be inserted into the insertion groove (132b). Through this, the gear coupling portion (131) and the link coupling portion (132) can be separated.

[0112] A fixed support member (132c) that supports an arm of a torsion spring (440) may be arranged on the side wall (130). One of a pair of arms of the torsion spring (440) may be fixed to the fixed support member (132c). The fixed support member (132c) may be formed to protrude from the side wall (130).

[0113]

[0114] Meanwhile, the cleaner nozzle (1) may include a side cover (200). The side covers (200) may be arranged on the left and right sides of the nozzle housing (100), respectively, to form the exterior of the cleaner nozzle (1). The side covers (200) may be arranged in pairs facing each other. The pair of side covers (200) may be formed perpendicular to the ground when the nozzle housing (100) is placed on the ground. The side covers (200) may be detachably coupled to the nozzle housing (100). The side covers (200) may be formed to cover the side wall (130) of the nozzle housing (100). The side covers (200) form a side space (S) together with the side wall (130), and may accommodate a gear (131a) and a second agitator link (430) in the side space (S).

[0115] The side cover (200) may include a cover protrusion (not shown). When the side cover (200) is coupled to the nozzle housing (100), the cover protrusion (not shown) may be inserted into the insertion groove (132b). At this time, a sealing member (450) may be positioned between the cover protrusion (not shown) and the insertion groove (132b). Through this, the cover protrusion (not shown) may seal the link coupling portion (132).

[0116]

[0117] The first agitator (300) is installed in the nozzle housing (100) and serves to separate foreign substances from the object to be cleaned. The first agitator (300) may be positioned forward of the cleaner nozzle (1). The first agitator (300) may be rotatably coupled to the nozzle housing (100).

[0118] The first agitator (300) is formed in a cylindrical shape and can be arranged along the left-right direction of the nozzle housing (100). That is, the longitudinal direction (axial direction) of the first agitator (300) can be arranged in a direction intersecting the front-back direction of the cleaner nozzle (1).

[0119] The outer surface of the first agitator (300) may be provided with a brush or a member capable of increasing friction.

[0120] The first agitator (300) is equipped with at least one gear to receive rotational power from an agitator motor (not shown).

[0121] The first agitator (300) can guide external dust and air to the suction port (121) by rotation. The first agitator (300) can be rotated in a direction in which the outer surface facing the ground moves toward the suction port (121). In other words, when looking at the vacuum cleaner nozzle (1) from the left side of the vacuum cleaner nozzle (1), the first agitator (300) can be rotated counterclockwise. With this configuration, external dust and air can be guided toward the suction port (121) by friction with the first agitator (300).

[0122] Meanwhile, the first agitator (300) can be replaceably connected to the nozzle housing (100). Therefore, the first agitator (300) can be replaced and cleaned depending on the cleaning environment.

[0123]

[0124] Second Agitator Module

[0125]

[0126] Meanwhile, the second agitator module (400) can be configured so that the second agitator (410) can move in the up and down direction.

[0127] The second agitator module (400) may include a second agitator (410), a suction path forming surface (420), a second agitator link (430), a torsion spring (440), and a sealing member (450).

[0128]

[0129] The second agitator (410) is installed in the nozzle housing (100) and serves to separate foreign substances from the object to be cleaned. The second agitator (410) may be positioned at the rear of the cleaner nozzle (1). The second agitator (410) may be rotatably coupled to the nozzle housing (100).

[0130] The second agitator (410) is formed in a cylindrical shape and can be arranged along the left-right direction of the nozzle housing (100). That is, the longitudinal direction (axial direction) of the second agitator (410) can be arranged in a direction intersecting the front-back direction of the cleaner nozzle (1).

[0131] The outer surface of the second agitator (410) may be provided with a brush or a member capable of increasing friction. The material of the second agitator (410) may be formed differently from the material of the first agitator (300). That is, the member may be formed of a different material from the member provided on the outer surface of the first agitator (300). For example, the member provided on the second agitator (410) may be formed of a material that is softer than the member provided on the first agitator (300).

[0132] The second agitator (410) can be rotated by friction with the floor surface (ground). Alternatively, the second agitator (410) can be rotated by power provided by an agitator motor (not shown). The second agitator (410) can guide external dust and air to the intake port (121) by rotation.

[0133] Meanwhile, the second agitator (410) can be replaceably connected to the nozzle housing (100). Therefore, the second agitator (410) can be replaced and cleaned depending on the cleaning environment.

[0134] Moreover, since the cleaner nozzle (1) of the present invention can replace both the first agitator (300) and the second agitator (410), it has the effect of maximizing cleaning efficiency by creating various agitator combinations depending on the condition of the ground or the cleaning environment.

[0135] At least a portion of the second agitator (410) may be surrounded by a suction path forming surface (420). As the second agitator (410) rotates, dust on the floor may be collected and moved toward the suction port (121). At this time, the suction path forming surface (420) arranged between the second agitator (410) and the suction port (121) forms a path through which air passes, and air including dust may flow along the suction path forming surface (420) to the cleaner body (2).

[0136] Meanwhile, a second agitator link (430) may be coupled to one longitudinal side of the second agitator (410). The second agitator (410) may move up and down through the rotation of the second agitator link (430).

[0137]

[0138] The suction path forming surface (420) may cover at least a portion of the second agitator (410). The suction path forming surface (420) may have an arc-shaped cross-section. The suction path forming surface (420) may be formed as a curved surface and may be formed to have a curvature corresponding to the outer circumference of the second agitator (410).

[0139] The suction path forming surface (420) can be arranged between the suction port (121) and the second agitator (410). The suction path forming surface (420) can be arranged between the first agitator (300) and the second agitator (410).

[0140] When the second agitator link (430) rotates in one direction, the second agitator (410) may be brought closer to the upper end of the suction path forming surface (420). On the other hand, when the second agitator link (430) rotates in the other direction, the second agitator (410) may be moved away from the upper end of the suction path forming surface (420).

[0141] Additionally, the lower part of the suction path forming surface (420) may be positioned apart from the ground. At this time, the gap (a) between the lower part of the suction path forming surface (420) and the ground may be formed to be greater than 2.0 mm and less than 5.0 mm.

[0142] This means that when the gap (a) is 2.0 mm or less, the size of foreign matter (bolts, nuts) according to European energy regulations (2.53.0 mm) or the size of foreign matter (rice grains, lentils) according to CMR standards (2.02.5 mm) may not pass through, which may result in a decrease in foreign matter suction performance. In other words, foreign matter according to standards may not flow smoothly into the suction port (121).

[0143] On the other hand, if the gap (a) exceeds 5.0 mm, there is a problem that the space of the suction path becomes too wide, and the negative pressure formed by the suction motor (not shown) cannot be effectively maintained. This may cause the surface pressure to decrease due to the deterioration of the sealing performance, and the suction performance of the cleaner nozzle (1) to deteriorate.

[0144] Therefore, by forming the gap (a) between the lower part of the suction path forming surface (420) and the ground to be greater than 2.0 mm and less than 5.0 mm, it is possible to achieve optimal suction efficiency and pickup performance by maintaining negative pressure around the suction port while allowing passage of standard foreign substances.

[0145]

[0146] The second agitator link (430) is coupled with the second agitator (410) to move the second agitator (410) in the up and down direction.

[0147] One side of the second agitator link (430) may be rotatably coupled to the nozzle housing (100). The other side of the second agitator link (430) may be coupled to the rotational axis of the second agitator (410). The second agitator link (430) may be arranged at the link coupling portion (132) of the side wall (130).

[0148] The second agitator link (430) can rotate about one side coupled to the nozzle housing (100) as an axis. At this time, when the second agitator link (430) rotates in one direction, the second agitator (410) can move upward and away from the ground. On the other hand, when the second agitator link (430) rotates in the opposite direction, the second agitator (410) can move downward and closer to the ground.

[0149] Accordingly, the second agitator link (430) can adjust the upper and lower position of the second agitator (410) according to the driving state of the cleaner nozzle (1) and the cleaning environment.

[0150] For example, when the vacuum cleaner nozzle (1) is driven on a carpet, the nozzle housing (100) can come into close contact with the carpet. The second agitator link (430) can rotate in one direction to move the second agitator (410) upward. This can prevent the vacuum cleaner nozzle (1) from coming into close contact with the carpet and blocking the air flow passage. In other words, by maintaining an appropriate gap between the nozzle housing (100) and the carpet, the surface pressure can be kept constant.

[0151] On the other hand, if the user pulls the vacuum cleaner nozzle (1) to drive backward, the rear of the nozzle housing (100) may be lifted. The second agitator link (430) may rotate in the opposite direction to move the second agitator (410) downward. This allows the vacuum cleaner nozzle (1) to maintain a constant distance from the ground.

[0152]

[0153] The second agitator link (430) may include a link body (430a), a cover part (430b) to which a torsion spring (440) is coupled, and a support part (430c) that supports an arm of the torsion spring (440).

[0154] The link body (430a) may be a rod-shaped body that extends in the longitudinal direction. One side of the link body (430a) may be coupled to the nozzle housing (100), and the other side may be coupled to the rotational axis of the second agitator (410).

[0155] First, the cover part (430b) may be formed to protrude outwardly from the link body (430a) along the rotational axis direction of the second agitator link (430). A torsion spring (440) may be coupled to the outer circumference of the cover part (430b). The torsion spring (440) may be arranged in a structure in which it is wound multiple times along the outer circumference of the cover part (430b). In addition, the cover part (430b) may accommodate a shaft for rotation therein.

[0156] The support member (430c) can support the arm of the torsion spring (440). The support member (430c) can be formed to protrude from the second agitator link (430) and support the arm of the torsion spring (440). The support member (430c) can be formed to protrude from the link body (430a) in a direction perpendicular to the longitudinal direction of the link body (430a). The support member (430c) can be arranged adjacent to the cover member (430b). The support member (430c) can be arranged between a portion of the link body (430a) coupled to the rotational axis of the second agitator (410) and the cover member (430b).

[0157] Additionally, a hole through which the arm of the torsion spring (440) can pass may be formed in the support member (430c). Accordingly, the support member (430c) can transmit the restoring force of the torsion spring (440) to the second agitator link (430).

[0158] The torsion spring (440) may be coupled to one side of the second agitator link (430). The torsion spring (440) may be coupled to the cover portion (430b) of the second agitator link (430). The torsion spring (440) may include a pair of arms. One arm of the torsion spring (440) may be fixed to the second agitator link (430). The other arm of the torsion spring (440) may be fixed to the nozzle housing (100). Specifically, one arm of the torsion spring (440) may be coupled to the support portion (430c). The other arm of the torsion spring (440) may be coupled to the fixed support portion (132c) protrudingly formed on the side wall (130).

[0159] Accordingly, the torsion spring (440) can apply a restoring force to the rotation of the second agitator link (430). When the second agitator link (430) rotates in one direction, the angle between the two arms of the torsion spring (440) can decrease. At this time, the torsion spring (440) can apply a force to cause the second agitator link (430) to rotate in the opposite direction of one direction, i.e., in the other direction.

[0160] On the other hand, if the second agitator link (430) rotates in a different direction, the angle between the two arms of the torsion spring (440) may increase. The torsion spring (440) may apply a force to cause the second agitator link (430) to rotate in the opposite direction, i.e., in one direction.

[0161] Meanwhile, the second agitator module (400) may include a sealing member (450) surrounding an area where the second agitator link (430) rotates on the side wall (130). The sealing member (450) may separate a gear coupling portion (131) where the gear is coupled and a link coupling portion (132) where the second agitator link (430) is coupled. Specifically, at least a portion of the sealing member (450) may be arranged between the gear (131a) and the second agitator link (430).

[0162] The sealing member (450) can be inserted into the insertion groove (132b) formed in the side wall (130). The sealing member (450) can be placed between the cover protrusion (not shown) of the side cover (200) and the insertion groove (132b) while the side cover (200) is coupled to the nozzle housing (100). Accordingly, the area surrounded by the sealing member (450) can be sealed.

[0163]

[0164] Meanwhile, the sealing member (450) can divide the side space (S) surrounded by the side cover (200) and the side wall (130) into two spaces. Specifically, the sealing member (450) is arranged between the side wall (130) and the side cover (200), and can divide the side space (S) into a first space (S1) and a second space (S2). Here, the first space (S1) may refer to a space including a gear coupling portion (131). In addition, the second space (S2) may refer to a space including a link coupling portion (132).

[0165] The sealing member (450) can prevent dust that may enter through the guide hole (132a) from entering the first space (S1) where the gear is accommodated.

[0166] The sealing member (450) may be formed of an elastic material. For example, it may be formed of rubber or silicone. The sealing member (450) may be configured to be detachable. The sealing member (450) may be inserted into and coupled to an insertion groove (132b) formed in the side wall (130). This facilitates maintenance or replacement of the sealing member (450).

[0167]

[0168] Meanwhile, in the vacuum cleaner nozzle (1) according to the embodiment of the present invention, the diameter (D1) of the first agitator and the diameter (D2) of the second agitator are different. Specifically, the diameter (D1) of the first agitator is larger than the diameter (D2) of the second agitator.

[0169] In this way, when the diameter (D1) of the first agitator is larger than the diameter (D2) of the second agitator, the torque of the second agitator (410) having a smaller diameter is smaller than the torque of the first agitator (300).

[0170] Additionally, as the diameter (D2) of the second agitator decreases, the rotational inertia generated during rotation decreases. Accordingly, the second agitator (410) can be manually rotated through the frictional force generated by contact with the floor surface.

[0171] For example, the diameter (D1) of the first agitator may be more than twice the diameter (D2) of the second agitator. When the diameter ratio of the first agitator (300) and the second agitator (410) is more than twice, the first agitator (300) can perform the main suction function through a relatively wide rotational area, while the second agitator (410) can perform an auxiliary rotational role based on its lightweight structure and small rotational inertia.

[0172] Therefore, compared to rotating two agitators having the same diameter, when the diameter (D2) of the second agitator is smaller than the diameter (D1) of the first agitator as in the present invention, the motor output required to rotate the first agitator (300) may be lower.

[0173] Specifically, when the diameter (D2) of the second agitator is reduced by half, the rotational inertia can be reduced by approximately 75% because the rotational inertia decreases in proportion to the square of the diameter. Accordingly, the frictional force generated by the second agitator (410) upon contact with the floor surface also decreases, and the motor output required to drive the first agitator (300) can be reduced by approximately 15 to 20%.

[0174]

[0175] In addition, the diameter (D1) of the first agitator is provided to be larger than the diameter (D2) of the second agitator, so that an incline can be formed on the upper surface (110) of the nozzle housing (100) covering the upper portions of the first agitator (300) and the second agitator (410).

[0176] In particular, when the diameter (D1) of the first agitator is more than twice the diameter (D2) of the second agitator, a steeper slope can be formed on the upper surface (110) of the nozzle housing (100) covering the two agitators. This is because the greater the difference in diameter between the first agitator (300) and the second agitator (410), the greater the difference in the upper heights of the two agitators.

[0177] That is, when the first agitator (300) and the second agitator (410) are placed on the floor (ground), the height of the top of the first agitator (300) is higher than the height of the top of the second agitator (410), and a height difference may also occur in the nozzle housing (100) covering it, and a slope may be formed connecting them.

[0178]

[0179] Although the present invention has been described in detail through specific examples, this is for the purpose of specifically explaining the present invention, and the present invention is not limited thereto, and it is clear that the present invention can be modified or improved by a person having ordinary knowledge in the relevant field within the technical spirit of the present invention.

[0180] All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

Claims

1. Nozzle housing with a suction port formed on the lower surface; A first agitator rotatably coupled to the nozzle housing; a second agitator rotatably coupled to the rear of the suction port; and A second agitator link having one end coupled to the nozzle housing and the other end coupled to the rotational axis of the second agitator; A vacuum cleaner nozzle including:

2. In paragraph 1, A torsion spring coupled to one side of the second agitator link and applying a restoring force to the rotation of the second agitator link; A vacuum cleaner nozzle including:

3. In paragraph 2, The above second agitator link is, Link body; and A support member protruding from the link body and supporting the arm of the torsion spring; A vacuum cleaner nozzle including:

4. In paragraph 1, The above nozzle housing, Side walls covering both longitudinal sides of the second agitator; Including, A vacuum cleaner nozzle characterized in that a guide hole is formed in the side wall to limit the up-and-down movement of the second agitator.

5. In paragraph 1, A suction flow path forming surface surrounding at least a portion of the second agitator; Including, A vacuum cleaner nozzle characterized in that the gap between the lower part of the suction path forming surface and the ground is greater than 2.0 mm and less than 5.0 mm.

6. In paragraph 1, A suction flow path forming surface surrounding at least a portion of the second agitator; Including, The above second agitator is, A vacuum cleaner nozzle characterized in that when the lower part of the suction path forming surface approaches the ground, it moves away from the ground.

7. In paragraph 1, A suction flow path forming surface surrounding at least a portion of the second agitator; Including, The above second agitator is, A vacuum cleaner nozzle characterized in that when the lower part of the suction path forming surface moves away from the ground, it moves away from the upper part of the suction path forming surface.

8. In paragraph 7, The above second agitator is, A vacuum cleaner nozzle characterized by maintaining contact with the ground.

9. In paragraph 4, A cleaner nozzle characterized by including a sealing member surrounding an area in which the second agitator link rotates on the side wall.

10. In paragraph 9, The above side wall, A gear coupling part in which a gear that applies power to the first agitator is coupled; and A link receiving portion including an area in which the second agitator link rotates; Including, The above sealing member, A vacuum cleaner nozzle characterized by dividing the gear coupling portion and the link receiving portion.

11. In paragraph 1, A vacuum cleaner nozzle, characterized in that the diameter of the first agitator is larger than the diameter of the second agitator.

12. In paragraph 11, A vacuum cleaner nozzle, characterized in that the diameter of the first agitator is at least twice the diameter of the second agitator.

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