Suction nozzle of dust collector

Abstract

The vacuum cleaner nozzle of the present invention comprises: a nozzle cover; a suction inlet which is formed in the nozzle cover and into which air containing dust flows; the first stirrer is accommodated in the suction nozzle cover body and is combined to be capable of rotating relative to the suction nozzle cover body; the second stirrer is linked with the first stirrer to rotate; and an agitator motor that applies a rotational force to the first agitator; the rotation speed of the first agitator is more than 10 times greater than the rotation speed of the second agitator, and therefore, even if foreign matters with large sizes are not clamped by the agitators, the foreign matters can be moved to the suction inlet side to be cleaned.

Description

Technical Field

[0001] The present invention relates to a vacuum cleaner nozzle, and more specifically, to a vacuum cleaner nozzle that sucks up dust from the ground by rotating two agitators in the same direction. Background Technology

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

[0003] The suction nozzle is the part that contacts the ground and directly sucks in dust and air. The suction force generated by the suction motor installed inside the vacuum cleaner body is transmitted to the suction motor, and through this suction, dust and air are drawn into the suction nozzle.

[0004] The suction nozzle is equipped with an agitator. The agitator improves cleaning performance by scraping away dust from the floor or carpet while rotating.

[0005] On the other hand, US Patent US7243393B2 discloses a vacuum cleaner nozzle with two agitators.

[0006] The vacuum cleaner nozzle uses two agitators to increase the suction power of dust.

[0007] However, the two agitators in the vacuum cleaner nozzle rotate at a speed ratio of 3:1, so the agitator positioned at the front also has a high rotational speed. Therefore, there is a limitation that surface pressure cannot be generated between the agitator positioned at the front and the surface being cleaned.

[0008] Additionally, if the front-mounted agitator encounters a large object, the object may become stuck in the agitator and cannot be pushed into the suction port. In this case, the user has to lift the vacuum cleaner nozzle and bring the suction port close to the large object to clean it.

[0009] In addition, there are limitations in that the agitator can only be detached from the front for replacement and cleaning. Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] The present invention is proposed to improve the problems existing in the conventional vacuum cleaner nozzles as described above, and its purpose is to provide a vacuum cleaner nozzle that can suck up large foreign objects.

[0012] In addition, the purpose is to provide a vacuum cleaner nozzle that can increase suction by creating surface pressure between the front agitator and the surface being cleaned.

[0013] In addition, the purpose is to provide a vacuum cleaner nozzle that allows both agitators to be separated, thereby enabling the agitators to be replaced according to the cleaning environment and the agitators to be cleaned when contamination occurs.

[0014] Technical solutions to the problem

[0015] To achieve the objectives described above, the vacuum cleaner nozzle of the present invention includes: a nozzle cover; an intake port formed in the nozzle cover, into which dust-containing air flows; a first agitator housed within the nozzle cover and configured to rotate relative to the nozzle cover; a second agitator rotating in conjunction with the first agitator; and an agitator motor applying a rotational force to the first agitator; wherein the rotational speed of the first agitator is more than 10 times greater than the rotational speed of the second agitator.

[0016] Therefore, the vacuum cleaner nozzle of the present invention also includes a speed reducer that connects the first agitator and the second agitator, and includes at least one gear.

[0017] At this time, the second agitator can be configured to be further away from the intake port than the first agitator.

[0018] The vacuum cleaner nozzle of the present invention further includes a connecting tube, which is connected to the nozzle cover and has a flow path inside that communicates with the suction port, so that dust flows toward the vacuum cleaner body; the second agitator can be configured to be further away from the connecting tube than the first agitator.

[0019] That is, the second agitator can be positioned further forward than the first agitator.

[0020] Therefore, the present invention can improve cleaning performance by reducing the rotational speed of the second agitator disposed at the front.

[0021] On the other hand, the diameter of the first agitator can be larger than the diameter of the second agitator.

[0022] Furthermore, the rotation direction of the first agitator can be the same as that of the second agitator.

[0023] On the other hand, the vacuum cleaner nozzle of the present invention may also include an agitator cover, the agitator cover being detachably coupled to the nozzle cover, wherein the first agitator and the second agitator are coupled to the agitator cover.

[0024] At this time, the reducer can be housed within the agitator cover.

[0025] Furthermore, the agitator motor can be housed inside the first agitator. This reduces the overall volume of the vacuum cleaner nozzle of the present invention.

[0026] On the other hand, the agitator cover can be separated from the second agitator while still engaged with the first agitator.

[0027] At this time, the second agitator may include: a second agitator body; and a locking part, which is housed inside the second agitator body and engages with the agitator cover.

[0028] At this time, the locking part may include: a locking cover housed inside the second agitator, with at least one locking platform formed on the inner circumferential surface of the locking cover; a stop member that is axially movable along the locking cover and inserted into the agitator cover; and a spring that applies a restoring force to the locking part.

[0029] Additionally, the agitator cover may include a push button; if an external force is applied to the push button, the push button will release the agitator cover from the locking part.

[0030] Therefore, the user can separate the second agitator from the agitator cover by pressing the push button.

[0031] The agitator cover can be separated from the nozzle cover by rotating it at a predetermined angle relative to the nozzle cover, with the first agitator as the axis, based on the state in which it is attached to the nozzle cover.

[0032] Therefore, after separating the second agitator from the agitator cover, the user can detach the first agitator from the nozzle cover by rotating the agitator cover.

[0033] Invention Effects

[0034] As described above, in the vacuum cleaner nozzle according to the present invention, the agitator disposed at the front also rotates under the driving force of the motor, and rotates by a high reduction ratio to generate a large force, thus having the effect of moving large foreign objects toward the suction port side for cleaning without them getting stuck in the agitator.

[0035] In addition, by introducing a reducer with a high reduction ratio and making the front agitator rotate at a lower speed than the rear agitator, surface pressure can be formed between the cleaned surface and the agitator, thereby improving suction performance.

[0036] In addition, users can easily press the push button to detach the front agitator, and by rotating the cover, they can easily detach the rear agitator from the nozzle cover.

[0037] Therefore, the agitator can be replaced according to the cleaning environment, and the agitator can be cleaned when contamination occurs. Attached Figure Description

[0038] Figure 1 This is a perspective view illustrating a vacuum cleaner nozzle according to an embodiment of the present invention.

[0039] Figure 2 yes Figure 1 A bottom view.

[0040] Figure 3 yes Figure 1 A sectional view.

[0041] Figure 4 yes Figure 1 Side view.

[0042] Figure 5 This is a cross-sectional view illustrating the connection relationship between the agitator cover and the second agitator in a vacuum cleaner nozzle according to an embodiment of the present invention.

[0043] Figure 6 This is a side view illustrating the state of rotation of the agitator cover in a vacuum cleaner nozzle with the second agitator separated, according to an embodiment of the present invention.

[0044] Figure 7 This is a diagram illustrating the state in which the agitator cover of a vacuum cleaner nozzle is separated from the nozzle cover body according to an embodiment of the present invention.

[0045] Figure 8 This is a perspective view illustrating the agitator cover in a vacuum cleaner nozzle according to an embodiment of the present invention.

[0046] Figure 9 This is a diagram illustrating the speed reducer in a vacuum cleaner nozzle according to an embodiment of the present invention.

[0047] Figure 10 It is a graph showing the cleaning performance of a vacuum cleaner nozzle. Detailed Implementation

[0048] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0049] This invention can be modified and has various embodiments; therefore, specific embodiments are shown in the accompanying drawings and described in detail in the description. This is not intended to limit the invention to the specific embodiments, but should be interpreted to include all modifications, equivalents, and substitutions within the spirit and scope of the invention.

[0050] Figure 1 A perspective view of a vacuum cleaner nozzle illustrating an embodiment of the present invention is shown. Figure 2 It shows Figure 1 The bottom view, Figure 3 It shows Figure 1 sectional view, Figure 4It shows Figure 1 Side view.

[0051] Reference Figures 1 to 4 The vacuum cleaner nozzle 1 of the present invention is described below.

[0052] As an example, the vacuum cleaner nozzle 1 in this embodiment can be connected to a handheld vacuum cleaner or a canister vacuum cleaner for use.

[0053] In addition, the term "floor" or "surface to be cleaned" in this instruction manual can be understood not only as the floor of a living room or room, but also as a surface to be cleaned, such as a carpet.

[0054] That is, the vacuum cleaner nozzle 1 can be detachably connected to the vacuum cleaner body (not shown) or the extension tube (not shown). Since the vacuum cleaner nozzle 1 is connected to the vacuum cleaner body (not shown) or the extension tube (not shown), the user can use the vacuum cleaner nozzle 1 to clean the floor. At this time, the vacuum cleaner body (not shown) with the vacuum cleaner nozzle 1 connected can separate dust from the air using a multi-cyclone method.

[0055] The vacuum cleaner nozzle 1 can receive power from the vacuum cleaner body (not shown) and operate. Specifically, the vacuum cleaner nozzle 1 can receive power from a battery (not shown) disposed in the vacuum cleaner body (not shown) and operate.

[0056] Since the vacuum cleaner body (not shown) connected to the vacuum cleaner nozzle 1 includes a suction motor (not shown), the suction force generated by the suction motor (not shown) can be applied to the vacuum cleaner nozzle 1.

[0057] Therefore, in this embodiment, the vacuum cleaner nozzle 1 can suck up foreign objects and air from the ground and guide them to the vacuum cleaner body (not shown).

[0058] A vacuum cleaner nozzle 1 according to an embodiment of the present invention includes a nozzle cover 100, a first agitator 200, a second agitator 300, an agitator cover 400, and a connecting pipe 500.

[0059] For reference, the directions used in this invention are explained below.

[0060] In this invention, the direction of the vacuum cleaner nozzle 1 can be defined using the suction port 121 as a reference. Specifically, using the suction port 121 as a reference, the direction in which the first agitator 200 is disposed can be referred to as the front of the vacuum cleaner nozzle 1, and the opposite direction can be referred to as the rear. In addition, using the state in which the vacuum cleaner nozzle 1 is placed on the ground (the surface to be cleaned) as a reference, the direction away from the ground can be referred to as the upper (upper side), and the direction closer to the ground can be referred to as the lower (lower side).

[0061] The nozzle cover 100 can be fitted with a first agitator 200 and a second agitator 300, and can form the appearance of a vacuum cleaner nozzle 1. Specifically, the nozzle cover 100 can be fitted with the first agitator 200 and the second agitator 300 via an agitator cover 400. Furthermore, the nozzle cover 100 can be combined with the agitator cover 400 to form the shape of the vacuum cleaner nozzle 1. In addition, a connecting tube 500 can be connected to the nozzle cover 100.

[0062] The nozzle cover 100 may include an upper cover 110.

[0063] Specifically, the upper cover 110 may include at least one surface with a predetermined curvature corresponding to the shape of the first agitator 200 and the shape of the second agitator 300.

[0064] The nozzle cover 100 may include a lower cover 120, which is combined with the upper cover 110 to internally accommodate a first agitator 200 and a second agitator 300.

[0065] At this time, the lower cover 120 can be configured to face the ground when the nozzle cover 100 is placed on the ground (the surface to be cleaned).

[0066] A suction port 121 may be formed in the nozzle cover 100. Specifically, a suction port 121 may be formed in the lower cover 120. The suction port 121 refers to a space in which air, including dust, can flow in. With the configuration described above, if the suction motor (not shown) of the vacuum cleaner body (not shown) is activated, dust and air present around the ground can be sucked into the flow path of the vacuum cleaner nozzle 1 through the suction port 121.

[0067] A printed circuit board (not shown) for controlling the agitator motor (not shown) can be installed inside the nozzle cover 100.

[0068] Additionally, the nozzle cover 100 may have a flow path that communicates with the suction port 121 and guides the air flowing in from the suction port 121 to the vacuum cleaner body (not shown).

[0069] The flow path can be configured inside the nozzle cover 100. The lower end of the flow path can be connected to the suction port 121, and the upper end of the flow path can be connected to the inside of the connecting tube 500.

[0070] The lower cover 120 may be equipped with at least one caster 123. For example, a pair of casters 123 may be symmetrically arranged on the lower cover 120. As an example, the pair of casters 123 may be arranged on the lower side of the lower cover 120 on the outer side in the left-right direction. With this configuration, even if the user's operating force is concentrated on one side of the vacuum cleaner nozzle in the left-right direction, the casters 123 can still roll and move along the ground.

[0071] As a result, in this invention, even if the user pushes or pulls the vacuum cleaner nozzle 1, the casters 123 can still roll along the ground, thus improving the user's operational power.

[0072] The caster 123 can be rotatably attached to the lower cover 120 and roll along the ground (the surface being cleaned).

[0073] At least a portion of the caster 123 may be exposed to the outside of the nozzle cover 100.

[0074] With the configuration described above, when the vacuum cleaner nozzle 1 is placed on the ground, the casters 123 can contact the ground. Therefore, when the vacuum cleaner nozzle 1 is moved by the user, the friction between the nozzle cover 100 and the ground can be reduced and the mobility of the vacuum cleaner nozzle 1 can be improved.

[0075] The connecting tube 500 can be rotatably connected to the nozzle cover 100. As an example, the nozzle cover 100 can be provided with a hinge axis that is connected to the first steering part 510, and the first steering part 510 can rotate (pivot) around the hinge axis.

[0076] This configuration ensures that the connecting tube 500 can rotate at a sufficient angle. In addition, the rear of the upper cover 110 is curved and forms downwards, which has the advantage of reducing the overall height of the vacuum cleaner nozzle 1 and also being able to clean low-height areas such as beds or sofas.

[0077] On the other hand, the vacuum cleaner nozzle 1 may have an air damper 124 to improve the suction power of the vacuum cleaner nozzle 1, and may have an air damper cover 125 to protect the air damper 124.

[0078] An air damper 124 can be provided to block the flow of air from the rear to the front when the vacuum cleaner nozzle 1 generates suction. In addition, the air damper 124 can prevent dust from flowing backward between the vacuum cleaner nozzle 1 and the surface being cleaned and instead being sucked into the suction port 121, so that the vacuum cleaner nozzle 1 can effectively suck up the dust on the surface being cleaned.

[0079] This damper 124 is provided to be disposed on the nozzle cover 100 and in contact with the surface to be cleaned. Furthermore, the damper 124 can apply a supporting force to the surface to be cleaned and maintain seamless contact with it. That is, the damper 124 can provide elastic support for the surface to be cleaned.

[0080] Furthermore, the damper 124 can be positioned adjacent to the suction inlet 121 of the nozzle cover 100. The damper 124 is positioned behind the suction inlet 121 of the nozzle cover 100 and can block the flow of air from the rear to the front when the vacuum cleaner nozzle 1 generates suction.

[0081] The damper 124 can be set behind the suction port 121 of the nozzle cover 100 along the left and right direction of the nozzle cover 100.

[0082] When the vacuum cleaner nozzle 1 is not placed above the surface being cleaned, a portion of the air vent 124 is formed to protrude from the lower side of the vacuum cleaner nozzle 1.

[0083] On the other hand, when the nozzle cover 100 is placed on the surface to be cleaned, the damper 124 is supported (pressed) against the surface and elastically deformed. That is, the damper 124 can come into contact with the surface to be cleaned before at least one of the wheels 540 and casters 123 of the nozzle cover 100 comes into contact with it. Furthermore, if at least one of the wheels 540 and casters 123 comes into contact with the surface to be cleaned, the damper 124 is pressed against the surface and elastically deformed.

[0084] Here, the damper 124 is compressed in a direction perpendicular to the surface being cleaned, so that it can be extended and elastically deformed in the front-back direction. Specifically, the damper 124 is compressed in a direction perpendicular to the surface being cleaned, so that it can be extended rearward and contact the damper cover 125 described later.

[0085] The damper 124 can be formed into a hollow shape and combined with the lower cover 120, or combined with the lower cover 120 to form a space with a hollow inner side.

[0086] The damper 124 is formed with a thicker part that collides with the obstacle, thereby preventing the damper 124 from deforming excessively when it collides with the obstacle.

[0087] An air vent cover 125 is disposed on the nozzle housing 100 to protect the air vent 124. The air vent cover 125 is formed in the left-right direction and is disposed behind the air vent 124 of the nozzle housing 100, covering at least a portion of the air vent 124. This air vent cover 125 is provided to block the upper space of the air vent 124, preventing a portion of the rear end of the air vent 124 from colliding with obstacles. That is, it prevents obstacles placed on the surface being cleaned from colliding with the air vent 124 when the vacuum cleaner nozzle 1 travels rearward.

[0088] The damper cover 125 can be configured to be spaced apart from the damper 124 in the front-to-back direction.

[0089] On the other hand, in the vacuum cleaner nozzle 1 of the present invention, the two agitators 200 and 300 can be attached to the nozzle cover 100 by an agitator cover 400. Specifically, in the vacuum cleaner nozzle 1 of the present invention, a first agitator 200 and a second agitator 300 can be attached to the agitator cover 400, and the agitator cover 400 can be detachably attached to the nozzle cover 100.

[0090] The relationship between the first agitator 200, the second agitator 300, and the agitator cover 400 will be explained later.

[0091] The agitator cover 400 is detachably attached to the nozzle cover 100 and incorporates a first agitator 200 and a second agitator 300. Additionally, a speed reducer 460 can be accommodated inside the agitator cover 400.

[0092] The specific structure of the agitator cover 400 will be explained later.

[0093] The connecting tube 500 forms a flow path communicating with the suction port 121, so that the nozzle cover 100 and the extension tube (not shown) or the nozzle cover 100 and the vacuum cleaner body (not shown) are connected.

[0094] The connecting tube 500 is connected to the nozzle cover 100 and forms a flow path inside that communicates with the suction port 121, which allows dust to flow towards the vacuum cleaner body (not shown).

[0095] The connecting pipe 500 includes a pipe 505, a first turning part 510, a second turning part 520, and a third turning part 530.

[0096] The tube 505 may have an internal flow path that communicates with the suction port 121. The tube 505 is combined with the nozzle cover 100, thereby communicating with the flow path inside the nozzle cover 100.

[0097] The tube 505 can be formed of a deformable material. Specifically, the tube 505 can be formed of a bendable material. Therefore, the tube 505 can be bent and deformed as the first turning portion 510, the second turning portion 520 and the third turning portion 530 of the connecting tube 500 rotate.

[0098] The first steering portion 510 is hinged to the nozzle cover 100 in at least a portion of the internal receiving tube 505.

[0099] The first turning part 510 can be formed into a hollow shape, so that the tube 505 passes through the interior. A hinge part is provided on one side, which is hinged to the nozzle cover 100, and the other side is rotatably connected to the second turning part 520.

[0100] With this configuration, when the user places the vacuum cleaner nozzle 1 on the ground and picks up or puts down the vacuum cleaner body (not shown), the vacuum cleaner body (not shown) and the connecting tube 500 can rotate around the rotation axis.

[0101] With this configuration, the user can easily move the vacuum cleaner nozzle 1 forward or backward.

[0102] The second steering unit 520 can be rotatably coupled to the first steering unit 510, and can be hingedly coupled to the third steering unit 530.

[0103] Specifically, the second steering part 520 is formed in a hollow shape, so that the tube 505 passes through the interior, one side is rotatably connected to the first steering part 510, and the other side is hinged to the third steering part 530.

[0104] The inner circumferential surface of one side of the second steering portion 520 can accommodate and engage the other end of the first steering portion 510. At this time, a platform can be formed at the other end of the first steering portion 510, thereby preventing the separation of the first steering portion 510 and the second steering portion 520.

[0105] The second steering section 520 is formed in a cylindrical shape and can be combined to allow it to rotate circumferentially about a central axis passing through the interior of the second steering section 520. That is, the second steering section 520 can rotate relative to the first steering section 510 in the circumferential direction of the tube.

[0106] With this configuration, the second steering unit 520 can rotate when the user places the vacuum cleaner nozzle 1 on the ground and rotates the vacuum cleaner body (not shown). When cleaning narrow spaces such as under beds or furniture where the vacuum cleaner nozzle can reach, the vacuum cleaner body (not shown) can be placed horizontally to clean the floor while the user is lying down.

[0107] With this configuration, the user can push or pull the vacuum cleaner body (not shown) to make the vacuum cleaner nozzle 1 reciprocate while the vacuum cleaner body (not shown) is placed horizontally on the surface to be cleaned.

[0108] On the other hand, the direction in which the first steering portion 510 rotates (pivots) relative to the nozzle cover 100 can intersect with the direction in which the second steering portion 520 rotates (slides) relative to the first steering portion 510.

[0109] Therefore, the vacuum cleaner nozzle 1 of the present invention has the advantage that the connecting tube 500 combines the rotation direction of the first turning part 510 and the rotation direction of the second turning part 520 and can be bent at various angles.

[0110] The wheel 540 may include a cylindrical or disc-shaped wheel body and a tire surrounding the outer circumference of the wheel body. With this configuration, the driving performance of the vacuum cleaner nozzle 1 can be improved by increasing the ground contact between the wheel 540 and the surface being cleaned.

[0111] Even if the user applies force instantly, the Wheel 540 can absorb the impact.

[0112] The wheel 540 can roll along the ground (the surface being cleaned) by the user's operation. When the vacuum cleaner nozzle 1 is attached to the surface being cleaned as the suction motor (not shown) operates, the wheel 540 can also roll along the surface being cleaned when the user applies force, thereby assisting the vacuum cleaner nozzle 1 to move back and forth. Therefore, the wheel 540 increases the user's ease of operation.

[0113] Therefore, users can easily move the vacuum cleaner nozzle 1 regardless of the material of the surface being cleaned.

[0114] The third steering portion 530 is rotatably coupled to the second steering portion 520. For example, the third steering portion 530 is formed in a tube-like shape, and a hinge portion that is hinged to the second steering portion 520 may be provided on one side of the third steering portion 530 in the longitudinal direction.

[0115] A rotatable second steering part 520 may be provided between the rotation axis of the first steering part 510 and the rotation axis of the third steering part 530, which are arranged in parallel with each other.

[0116] With this configuration, even when the vacuum cleaner body is placed horizontally on the surface being cleaned, the user can operate the vacuum cleaner nozzle by pushing or pulling the vacuum cleaner body.

[0117] As a result, the connecting tube 500 of the present invention can be rotated through three rotating axes and can be bent at various angles, thus having the advantage of making the user's operation easier.

[0118] The other side of the third steering unit 530 can be detachably attached to an extension tube (not shown) or a vacuum cleaner body (not shown).

[0119] on the other hand, Figure 5 A cross-sectional view is shown to illustrate the connection relationship between the agitator cover and the second agitator in a vacuum cleaner nozzle according to an embodiment of the present invention. Figure 6 A side view is shown to illustrate the state of rotation of the agitator cover with the second agitator separated. Figure 7 A diagram is shown illustrating the state in which the agitator cover of a vacuum cleaner nozzle is separated from the nozzle cover body according to an embodiment of the present invention. Figure 8 A perspective view of an agitator cover in a vacuum cleaner nozzle, illustrating an embodiment of the present invention, is shown. Figure 9 A diagram is shown illustrating a speed reducer in a vacuum cleaner nozzle according to an embodiment of the present invention.

[0120] Reference Figures 5 to 9 The first agitator 200, the second agitator 300, and the agitator cover 400 will be described below.

[0121] The first agitator 200 is disposed on the nozzle housing 100 and serves to separate foreign objects from the object being cleaned. The first agitator 200 can be rotatably attached to the nozzle housing 100. The first agitator 200 can be positioned further forward than the connecting tube 500.

[0122] The first agitator 200 can be formed in a cylindrical shape and can be arranged in the left-right direction along the nozzle cover 100. That is, the length direction (axial direction) of the first agitator 200 can be arranged to intersect the front-back direction of the vacuum cleaner nozzle 1.

[0123] A brush or a component that increases friction may be provided on the outer peripheral surface of the first agitator 200.

[0124] The first agitator 200 can receive rotational power from an agitator motor (not shown). The agitator motor (not shown) can be housed within the first agitator 200. For example, the agitator motor (not shown) and the first agitator 200 can be connected to transmit power via a clutch structure, spline engagement, or at least one gear.

[0125] The first agitator 200 can guide external dust and air to the suction inlet 121 by rotation. The first agitator 200 can rotate in a direction that moves towards the suction inlet 121 on its outer peripheral surface facing the ground. In other words, based on the view of the vacuum cleaner nozzle 1 from the left side, the first agitator 200 can rotate counterclockwise. With the configuration described above, external dust and air can be guided towards the suction inlet 121 while rubbing against the first agitator 200.

[0126] On the other hand, the first agitator 200 can be interchangeably attached to the nozzle cover 100. Specifically, the first agitator 200 can be attached to the agitator cover 400, which can be detachably attached to the nozzle cover 100.

[0127] Therefore, depending on the cleaning environment, the first agitator 200 can be replaced and the cleaning can be performed.

[0128] The second agitator 300 is disposed on the nozzle cover 100 and functions together with the first agitator 200 to separate foreign objects from the object being cleaned. The second agitator 300 can be rotatably coupled to the nozzle cover 100.

[0129] The second agitator 300 can be positioned further forward than the first agitator 200. That is, the second agitator 300 can be positioned further away from the suction port 121 than the first agitator 200. Furthermore, the second agitator 300 can be positioned further away from the connecting pipe 500 than the first agitator 200.

[0130] The second agitator 300 is cylindrical and can be arranged in the left-right direction along the nozzle cover 100. That is, the length direction (axial direction) of the second agitator 300 can be arranged in a direction parallel to the length direction (axial direction) of the first agitator 200.

[0131] In this embodiment, the diameter of the second agitator 300 is smaller than the diameter of the first agitator 200, but it is not limited thereto.

[0132] The outer peripheral surface of the second agitator 300 can be formed of a material that can increase friction.

[0133] The second agitator 300 can receive rotational power from the first agitator 200. Specifically, the second agitator 300 can receive the rotational force of the first agitator 200 through a reducer 460 disposed inside the agitator cover 400. Therefore, the second agitator 300 can rotate in conjunction with the first agitator 200.

[0134] At this time, the ratio of the rotational speed of the first agitator 200 to the rotational speed of the second agitator 300 can be determined according to the gear ratio of the reducer 460. Specifically, the rotational speed of the first agitator 200 can be more than 10 times greater than the rotational speed of the second agitator 300. For example, when the rotational speed of the first agitator 200 is 3500 rpm, the rotational speed of the second agitator 300 can be 350 rpm or less. Furthermore, preferably, when the rotational speed of the first agitator 200 is 3500 rpm, the rotational speed of the second agitator 300 can be 50 rpm or more and 150 rpm or less.

[0135] With this configuration, the second agitator 300 can be rotated by driving an agitator motor (not shown), which can increase the difference in rotational speed between the first agitator 200 and the second agitator 300.

[0136] As a result, it has the advantage of applying high surface pressure in the second agitator 300, which enables it to maintain a higher suction force for foreign objects.

[0137] That is, as described above, when the agitator positioned at the front rotates rapidly, the agitator cannot press the surface being cleaned sufficiently and rotate to remove foreign objects; it only has the effect of removing foreign objects twice by simply using two agitators.

[0138] In contrast, the second agitator 300 of the present invention rotates slowly, thus pressing the surface to be cleaned firmly and rotating it, thereby vigorously removing foreign objects.

[0139] Therefore, for foreign objects that are difficult to clean by high-speed rotation, the second agitator 300 can remove them first to make cleaning easier, and the first agitator 200 can then perform additional cleaning, thereby cleaning the surface to be cleaned.

[0140] In addition, when cleaning relatively large foreign objects with existing vacuum cleaner nozzles that only have a high-speed rotating agitator, the foreign object may get stuck between the agitator and the ground and the agitator cannot remove it, or the agitator may stop rotating. As a result, the user needs to perform additional cleaning actions to clean it.

[0141] In contrast, the present invention has the advantage that although the second agitator 300 rotates at a slow speed, it can rotate with great force, and even if a relatively large foreign object is stuck between the second agitator 300 and the ground, it can move it toward the suction port 121.

[0142] The second agitator 300 can guide external dust and air to the suction port 121 by rotation. The second agitator 300 can rotate in the same direction as the first agitator 200. That is, the outer peripheral surface of the second agitator 300 facing the ground can rotate in the direction of movement toward the suction port 121. With this configuration, external dust and air rub against the second agitator 300, thereby being guided in the direction of both the first agitator 200 and the suction port 121.

[0143] on the other hand, Figure 10 A graph is shown illustrating the relationship between the rotational speed of the second agitator 300 and its cleaning performance.

[0144] Reference Figure 10 As the rotational speed of the second agitator 300 increases, its ability to remove foreign objects improves. Furthermore, it maintains its cleaning performance even at speeds exceeding a specified rotational speed. For example, as... Figure 10 As shown, the cleaning performance of the vacuum cleaner nozzle 1 can be maintained at a rotation speed of 350 rpm or higher. This can be seen as the result that the faster the second agitator 300 rotates, the faster it removes foreign objects.

[0145] On the other hand, refer to Figure 10 It can be seen that as the rotational speed of the second agitator 300 increases, its ability to pick up carpets decreases. When the surface to be cleaned, such as a carpet, has bristles, friction may increase in its relationship with the second agitator 300. As the rotational speed of the second agitator 300 increases, the second agitator 300 and the carpet adhere to each other, thereby reducing the airflow towards the suction inlet 121. Consequently, when the surface to be cleaned is made of materials such as carpet, as the rotational speed of the second agitator 300 increases, the foreign object suction performance of the vacuum cleaner nozzle 1 may decrease.

[0146] Therefore, as described in this invention, when the second agitator 300 is rotated at 350 rpm or less (preferably 50 rpm or more and 150 rpm or less), it has the effect of minimizing the reduction in carpet pickup performance and maintaining cleaning performance against foreign objects.

[0147] On the other hand, the second agitator 300 can be interchangeably coupled to the nozzle cover 100. Specifically, the second agitator 300 can be detachably coupled to the agitator cover 400 and the nozzle cover 100.

[0148] Specifically, the second agitator 300 may include a second agitator body 310 and a locking part 320.

[0149] The second agitator body 310 can be formed into a hollow cylindrical shape. This configuration can minimize the weight of the vacuum cleaner nozzle 1.

[0150] The locking part 320 can be accommodated inside the second agitator body 310 and engaged with the agitator cover 400. Specifically, the locking part 320 can be splinedly engaged with the second agitator connection part 440 of the agitator cover 400, thereby being able to receive power applied through the reducer 460.

[0151] The locking part 320 includes a locking cover 321, a stop 322, a spring 323, and a locking part cover 324.

[0152] The locking cover 321 is housed inside the second agitator body 310. For example, the locking cover 321 is formed in a cylindrical shape and can be inserted into and engaged with a groove formed on the inner circumferential surface of the second agitator body 310.

[0153] The stop 322 can be configured to move axially along the locking cover 321 and insert into the agitator cover.

[0154] Specifically, the stop 322 includes an insertion portion 322a, which is configured such that its axial end engages with a splined engagement with a groove 441 formed in the second agitator connection portion 440. In this case, the axial end of the stop 322 can be configured to be inserted in accordance with the shape of the groove 441.

[0155] In addition, the stop 322 is provided with a stop body 322b that extends axially from the insertion portion 322a in a cylindrical shape. The other axial side of the stop body 322b may include a support portion 322c, which protrudes radially outward from the outer peripheral surface of the stop body 322b so as to receive elastic force by the spring 323.

[0156] Spring 323 can apply a restoring force to stop 322. Specifically, when the force applied to stop 322 is released, spring 323 can return stop 322 to its original position.

[0157] The locking cover 324 engages with the locking housing 321 to prevent the stop 322 from disengaging. Specifically, the locking cover 324 can hook into the locking housing 321 to accommodate the stop 322 internally. Therefore, even if the stop 322 moves toward the agitator cover 400 under the action of the spring 323, the range of movement of the stop 322 can be limited.

[0158] With this configuration, if the push button 450 (described later) is pressed by the user, the stop 322 moves, thereby disengaging the second agitator 300 and the agitator cover 400.

[0159] Therefore, with the agitator cover 400 and the nozzle cover 100 separated from each other, the second agitator 300 can be separated from the nozzle cover 100.

[0160] Therefore, the second agitator 300 can be replaced and cleaned depending on the cleaning environment. Additionally, it has the advantage of being able to separate and clean the second agitator 300.

[0161] The agitator cover 400 can be detachably attached to the nozzle cover 100. Specifically, the agitator cover 400 can be attached to one side of the nozzle cover 100 in the left-right direction. That is, one side of the nozzle cover 100 in the left-right direction can be formed in an open form and attached to the agitator cover 400, while the other side of the nozzle cover 100 in the left-right direction can be formed in a closed form.

[0162] Therefore, the agitator cover 400 can form the appearance of the vacuum cleaner nozzle 1 together with the nozzle cover 100, and the internal space where the agitator cover 400 and the nozzle cover 100 are combined can accommodate the first agitator 200 and the second agitator 300.

[0163] The agitator cover 400 includes a cover body 410, a first agitator connection part 420, a gearbox 430, a second agitator connection part 440, and a push button 450.

[0164] The cover body 410 covers one side of the nozzle cover 100 in the left-right direction. For example, the cover body 410 can be formed into a flat plate shape that covers one side of the nozzle cover 100 in the left-right direction. In this case, the shape of the cover body 410 can be formed as a symmetrical (mirror image) shape to a part of the other side of the nozzle cover 100 in the left-right direction opposite to the cover body 410.

[0165] The first agitator connection part 420 can be inserted into the interior of the first agitator 200 and connected to the agitator motor (not shown), thereby being able to receive power from the agitator motor (not shown).

[0166] Specifically, the first agitator connection 420 includes: an agitator insertion part 421, which is coupled to the inner circumferential surface of the first agitator 200 and is coupled together with the first agitator 200; and a shaft coupling part 422, which is coupled to the shaft spline of the agitator motor (not shown) and rotates together with the shaft of the agitator motor (not shown).

[0167] Therefore, the first agitator connection 420 can be connected to the agitator motor (not shown) to receive power from the agitator motor (not shown) and rotate together with the first agitator 200.

[0168] A reducer 460 can be accommodated inside the agitator cover 400. Specifically, a reducer 460 consisting of at least one gear can be accommodated inside the gearbox 430 of the agitator cover 400.

[0169] That is, the gearbox 430 can be combined with the cover body 410 to form a space inside that can accommodate the reducer 460.

[0170] The gearbox 430 can be formed to protrude into the interior of the nozzle cover 100. That is, the gearbox 430 can protrude into the first agitator 200 and the second agitator 300.

[0171] The gearbox 430 may include: an input gearbox 431 that houses a gear that is coaxially mounted with and rotates together with the first agitator connection 420; an output gearbox 432 that houses at least a portion of the second agitator connection 440; and a connecting gearbox 433 that connects the input gearbox 431 and the output gearbox 432.

[0172] Therefore, the rotation of the gear housed inside the gearbox 430 allows the power applied from the agitator motor (not shown) to be transmitted to the second agitator 300, while preventing interference with other components in the process.

[0173] On the other hand, at least one guide rib 434 that guides and engages with the nozzle cover 100 can be formed on the outer surface of the gearbox 430. Specifically, the guide rib 434 can be formed on the outer surface of the input gearbox 431 and protrudes circumferentially with the shaft connection portion 422 as the origin.

[0174] The guide ribs 434 can support each other with the guide ribs (not shown) formed on the nozzle cover 100. Specifically, when the agitator cover 400 is attached to the nozzle cover 100, the guide ribs of the nozzle cover 100 can be disposed between the cover body 410 and the guide ribs 434. Furthermore, when two or more guide ribs 434 are formed, the spacing between the guide ribs 434 is at least greater than the spacing between the guide ribs of the nozzle cover 100. Therefore, during the attachment or detachment of the agitator cover 400 from the nozzle cover 100, the user can rotate the agitator cover 400 to move the guide ribs of the nozzle cover 100 through the space between the guide ribs 434. On the other hand, when the agitator cover 400 and the nozzle cover 100 are attached, the guide ribs 434 of the agitator cover 400 and the guide ribs of the nozzle cover 100 can support each other, thereby preventing the agitator cover 400 from detaching.

[0175] Therefore, the agitator cover 400 can be separated from the nozzle cover 100 by rotating it at a predetermined angle relative to the nozzle cover 100 with the first agitator 200 as the axis, based on the state in which it is engaged with the nozzle cover 100.

[0176] The second agitator connection portion 440 can be coupled to the second agitator 300 to transmit the rotational force applied from the agitator motor and transmitted through the reducer 460 to the second agitator 300. Specifically, the second agitator connection portion 440 can be housed within the gearbox 430 and splinedly coupled to the second agitator 300. For example, the second agitator connection portion 440 may have gear teeth formed on its outer peripheral surface to receive rotational power, and a coupling groove 441 for splined coupling to the second agitator 300 may be formed at the center of rotation. As an example, the coupling groove 441 may be formed in the shape of a quadrilateral groove, but is not limited thereto.

[0177] If an external force is applied to the push button 450, the push button 450 can disengage the second agitator 300 and the second agitator connection 440. Specifically, the push button 450 pushes the locking part 320 accommodated in the connecting groove 441 under the action of external force, thereby disengaging the second agitator 300 and the second agitator connection 440.

[0178] On the other hand, the axial end of the push button 450 includes a button portion 451, which is formed in the shape of a plate and together with the cover body 410 constitutes the shape of the vacuum cleaner nozzle 1. The button portion 451 is pressed by the user. As an example, the button portion 451 can be circular or elliptical.

[0179] At this time, the button part 451 can be accommodated in the button receiving hole 411 formed in the cover body 410. At this time, the button receiving hole 411 is formed in a position facing the second stirrer connection part 440. A spring 454 is provided between the button part 451 and the second stirrer connection part 440, so that when the push button 450 is pressed, the push button can be reset to its original position.

[0180] Furthermore, a locking portion 452 may be formed circumferentially at the radially outer end of the button portion 451, and the locking portion 452 is formed by bending and extending toward the inside of the vacuum cleaner nozzle 1. In this case, the locking portion 452 may be formed in a shape where its diameter gradually increases as it moves away from the button portion 451. On the other hand, the button receiving hole 411 may be formed in a shape where its diameter gradually decreases as it approaches the outer side of the vacuum cleaner nozzle 1.

[0181] With this configuration, it is possible to prevent the button part 451 from moving outward more than the cover body 410 when it is pressed and moves outward to the outside of the vacuum cleaner nozzle 1 under the restoring force of the spring 454.

[0182] Additionally, the push button 450 may include a push portion 453, which moves in a stroke when an external force is applied to press the locking portion 320. Specifically, the push portion 453 is formed to protrude from the inner side (inner direction of the vacuum cleaner nozzle 1) of the button portion 451. If an external force is applied and the button portion 451 is pressed, the push portion 453 can move together with the button portion 451, thereby passing through the second agitator connection portion 440 and pressing the locking portion 320.

[0183] With this configuration, if the pushing part 453 presses the locking part 320, the connection between the agitator cover 400 and the second agitator 300 is released, thereby allowing the agitator cover 400 and the second agitator 300 to be separated.

[0184] Therefore, according to the present invention, the user can separate the second agitator 300 and the agitator cover 400 by simply pressing the push button 450.

[0185] Furthermore, after the second agitator 300 and the agitator cover 400 are separated, the agitator cover 400 can be rotated to separate only the second agitator 300 from the nozzle cover 100.

[0186] That is, the agitator cover 400 can be separated from the second agitator 300 while it is engaged with the first agitator 200.

[0187] Therefore, according to the present invention, the user can easily separate the second agitator 300 from the nozzle cover 100, thus having the advantage of being able to replace the second agitator 300 to match the cleaning environment, and being able to clean the contaminated second agitator 300.

[0188] The reducer 460 includes at least one gear, thereby enabling rotational power connection between the first agitator 200 and the second agitator 300. Specifically, the reducer 460 may include: an input gear 461, which is directly connected to or rotates through the shaft of an agitator motor (not shown); and a connecting gear 462, which connects the input gear 461 and the second agitator connection 440.

[0189] At this time, the rotational speed ratio of the first agitator 200 and the second agitator 300 can be set according to the gear ratio between the input gear 461 and / or the connecting gear 462 and the second agitator connection part 440. In particular, in the present invention, it is preferable to set the gear ratio such that the rotational speed of the first agitator 200 is more than 10 times faster than the rotational speed of the second agitator 300.

[0190] On the other hand, in this embodiment, the connecting gear 462 is composed of three gears, but it is not limited to this and can be configured in various combinations of gears to set the gear ratio.

[0191] The above description, through specific embodiments of the present invention, is only for illustrating the present invention. The present invention is not limited thereto, and obviously, the present invention can be modified or improved by those skilled in the art.

[0192] Simple variations or modifications of this invention are all within the scope of this invention, and the specific scope of protection of this invention will be further clarified by the scope of the appended claims.

Claims

1. A vacuum cleaner nozzle, characterized in that, include: The nozzle cover; An intake port is formed in the nozzle cover, through which dust-laden air flows in; A first agitator is housed within the nozzle housing and is configured to rotate relative to the nozzle housing. as well as The second agitator rotates in conjunction with the first agitator. The rotational speed of the first agitator is more than 10 times greater than that of the second agitator.

2. The vacuum cleaner nozzle according to claim 1, characterized in that, It also includes a speed reducer that connects the first agitator and the second agitator, and includes at least one gear.

3. The vacuum cleaner nozzle according to claim 1, characterized in that, It also includes an agitator motor that applies a rotational force to the first agitator.

4. The vacuum cleaner nozzle according to claim 1, characterized in that, The second agitator is configured to be further away from the intake port than the first agitator.

5. The vacuum cleaner nozzle according to claim 1, characterized in that, It also includes a connecting tube, which is connected to the nozzle cover. A flow path communicating with the suction port is formed inside the connecting tube, so that dust flows toward the vacuum cleaner body. The second agitator is configured to be further away from the connecting pipe than the first agitator.

6. The vacuum cleaner nozzle according to claim 1, characterized in that, The diameter of the first agitator is larger than the diameter of the second agitator.

7. The vacuum cleaner nozzle according to claim 1, characterized in that, The rotation direction of the first agitator is the same as that of the second agitator.

8. The vacuum cleaner nozzle according to claim 1, characterized in that, It also includes an agitator cover, which is detachably attached to the nozzle housing, and the first agitator and the second agitator are attached to the agitator cover.

9. The vacuum cleaner nozzle according to claim 8, characterized in that, It also includes a speed reducer that connects the first agitator and the second agitator, and includes at least one gear; The speed reducer is housed within the agitator cover.

10. The vacuum cleaner nozzle according to claim 8, characterized in that, It also includes an agitator motor that applies a rotational force to the first agitator; The agitator motor is housed inside the first agitator.

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