KR20240174208A - Vacuum cleaner head - Google Patents

Abstract

The present invention relates to a vacuum cleaner head, and more specifically, to a vacuum cleaner head in which the area of a suction slit of a head casing through which foreign substances are sucked is blocked by a first blocking portion of a first rotor and a second blocking portion of a second rotor to concentrate suction force on an open surface, and the area of the open surface changes as the second rotor moves, thereby further amplifying the suction force, and the position of the open surface moves as the first and second rotors rotate, so that the suction slit covers the entire surface.

Description

Vacuum cleaner head {Vacuum cleaner head}

The present invention relates to a vacuum cleaner head, and more specifically, to a vacuum cleaner head in which the area of a suction slit of a head casing through which foreign substances are sucked is blocked by a first blocking portion of a first rotor and a second blocking portion of a second rotor to concentrate suction force on an open surface, and the area of the open surface changes as the second rotor moves, thereby further amplifying the suction force, and the position of the open surface moves as the first and second rotors rotate, so that the suction slit covers the entire surface.

In general, a vacuum cleaner is a device that sweeps or scatters foreign substances such as dust or hair present in the cleaning area, and then sucks in the scattered foreign substances such as dust or hair using suction power to clean the area to be cleaned.

A conventional vacuum cleaner used to clean floors in homes, offices, or businesses consists of a head that sucks in foreign substances, a motor that generates suction, a dust collector that collects dust and debris in one place, and a connecting part that connects the head and the dust collector.

For the head part that can be detached and replaced on the vacuum cleaner suction inlet, there is a general head that can easily clean a wide area, a crevice head that can clean narrow gaps such as window frames or door gaps, and a brush head that is suitable for various usage environments such as the gap between the top of a storage unit and furniture.

In the case of a general head formed with a long width, there is an advantage in that it can easily clean a wide area. Therefore, a general head is used when cleaning a wide floor surface such as a living room, bedroom, or performance hall. However, there is a disadvantage in that the suction power generated by the motor is distributed over the wide area of the general head, so when sucking up dust or heavy foreign substances stuck to the floor, the suction power is insufficient, and the cleaning effect is reduced.

In the case of a crevice head that can easily clean the gaps between window frames or furniture, the suction area is narrower than that of a regular head. Since the suction power generated by the motor is concentrated on a narrow area, there is an advantage of having higher suction power. However, when cleaning a wide space with a narrow crevice head, the user has to move the vacuum cleaner suction more than a regular head and clean it, and when cleaning for a long time, the weight of the vacuum cleaner causes fatigue and discomfort in the body such as the arms and waist.

Also, when looking at the air flow inside the vacuum cleaner, in a conventional vacuum cleaner, foreign substances pass through the cleaner head and connection to reach the dust collector, and the dust collector is equipped with a filter to filter out dust contained in the air. The motor that sucks in air is located at the back of the dust collector. Therefore, while cleaning, foreign substances such as dust and hair accumulate in the filter inside the dust collector, blocking the suction holes of the motor, which reduces the suction power of the vacuum cleaner. In order to increase the reduced suction power to a certain level, if the rotation speed of the motor is increased, the power consumption of the vacuum cleaner increases and there is a disadvantage of generating loud noise.

In the case of cordless vacuum cleaners or robot vacuum cleaners that use batteries to operate the motor, the battery capacity must be increased to match the increased power consumption. Cordless vacuum cleaners used for easy cleaning have the disadvantage of causing inconvenience to users due to the heavy weight of the battery, and the increased power consumption shortens the usage time and requires frequent charging.

Therefore, it is necessary to develop a vacuum cleaner head that can remove dust and foreign substances stuck to a wide floor surface with strong suction power, while not putting a strain on the body during long-term cleaning, and maintaining constant suction power to reduce power consumption.

KR 20-0243532 (Y1) 2001.08.08. KR 10-2020-0117358 (A) 2020.10.14.

In order to solve the above problems, the present invention provides a vacuum cleaner head in which the area of a suction slit of a head casing that comes into contact with a surface to be cleaned and sucks in foreign substances is partially blocked by a first blocking portion of a first rotor to reduce the area into which foreign substances are sucked, thereby enhancing suction power, and in which, as the first rotor rotates, an open surface into which foreign substances are sucked covers the entire area of the suction slit, thereby enabling cleaning of a wide area, and in which the first opening of the first rotor can be covered with a second blocking portion as much as the user needs, thereby enabling amplification of suction power while using the same suction motor.

Another object of the present invention is to provide a vacuum cleaner head which, by connecting a first rotor and a second rotor with splines to transmit the rotation of the first rotor to the second rotor while moving the second rotor axially with respect to the first rotor and reducing the suction area, provides a suction force stronger than the maximum suction force provided by the suction motor of the cleaner when a strong suction force is required.

Another object of the present invention is to provide a vacuum cleaner head in which a user can manually or electrically control an opening/closing regulator that changes the suction area, thereby allowing the user to strengthen or weaken the suction power when necessary.

Another object of the present invention is to provide a vacuum cleaner head that allows a user to change the relative positions of a plurality of rotors that rotate synchronously, thereby controlling suction power without changing the rotational power of the motor.

In order to achieve the above object, the present invention comprises: a first rotor (100) in which first openings (110) for sucking in foreign substances and first blocking sections (120) for blocking the inflow of foreign substances are alternately arranged, and which is rotated by a rotary motor (130); a second rotor (200) which is arranged inside the first rotor (100), has the same rotational axis as the first rotor (100), rotates synchronously with the first rotor (100), and in which second openings (210) for sucking in foreign substances and second blocking sections (220) for blocking the inflow of foreign substances are alternately arranged; A head casing (300) is formed with a suction pipe (330) that moves foreign substances sucked into the interior to a dust collector, and a suction slit (310) through which the first rotor (100) and the second rotor (200) are exposed; and the overlapping area of the first opening (110) and the second opening (210) is changed within the suction slit (310) according to the axial position of the second rotor (200).

In addition, the first rotor (100) of the present invention has a spline (140) formed thereon that transmits rotational force to the second rotor (200); and the second rotor (200) moves in the axial direction of the spline (140) by an external force.

In addition, the second rotor (200) of the present invention has a boss (250) formed into which the spline (140) is inserted.

In addition, a coupling hole (260) is formed at one end of the second rotor (200) of the present invention; an opening/closing regulator (270) having a coupling pin (271) inserted into the coupling hole (260) is provided; and the second rotor (200) slides within the first rotor (100) by an external force applied to the opening/closing regulator (270).

In addition, a sliding member (320) that guides the reciprocating movement of the opening/closing regulator (270) is formed in the head casing (300) of the present invention.

In addition, due to the axial movement of the second rotor (200) of the present invention, the second blocking portion (220) covers the area where the first opening (110) and the suction slit (310) overlap; foreign substances are sucked in the open surface (311), which is an area of the suction slit (310) that is not covered by either the first blocking portion (120) or the second blocking portion (220).

In addition, the first rotor (100) and the second rotor (200) of the present invention have a cylindrical shape, and the first opening (110) and the second opening (210) have a spiral shape.

The vacuum cleaner head according to the present invention partially blocks the area of a suction slit of a head casing that comes into contact with a surface to be cleaned and sucks in foreign substances, with a first blocking portion of a first rotor, thereby reducing the area into which foreign substances are sucked, thereby enhancing suction power, and as the first rotor rotates, the open surface through which foreign substances are sucked covers the entire area of the suction slit, thereby enabling cleaning of a wide area. In addition, since the first opening of the first rotor can be covered with a second blocking portion as much as the user needs, there is an effect of being able to amplify suction power while using the same suction motor.

In addition, the present invention has the effect of providing a suction force stronger than the maximum suction force provided by the suction motor of the vacuum cleaner when a strong suction force is required by reducing the suction area while transmitting the rotation of the first rotor to the second rotor by connecting the first rotor and the second rotor with a spline and moving the second rotor in the axial direction with respect to the first rotor.

In addition, the present invention has the effect of allowing the user to manually or electrically control the opening/closing regulator that changes the suction area, thereby allowing the user to strengthen or weaken the suction power when necessary.

Furthermore, the present invention has the effect of controlling suction power without changing the rotational power of the motor by allowing the user to change the relative positions of a plurality of rotors that rotate synchronously.

Figure 1 is a bottom perspective view of the vacuum cleaner head of the present invention.
Figure 2 shows a head casing in a vacuum cleaner head of the present invention, (a) is a bottom perspective view, and (b) is a front perspective view.
Figure 3 is a perspective view showing a first rotor in a vacuum cleaner head of the present invention.
Fig. 4 is a perspective view showing a second rotor in the vacuum cleaner head of the present invention.
FIG. 5 is a cross-sectional view showing a second rotor of another embodiment of the vacuum cleaner head of the present invention.
Figure 6 is a cross-sectional view of a vacuum cleaner head according to the present invention in which the second rotor is accommodated inside the first rotor.
Figure 7 is a cross-sectional view of a vacuum cleaner head according to the present invention in which the second blocking portion does not block the area where the first opening and the suction slit overlap.
Figure 8 is a cross-sectional view of a vacuum cleaner head according to the present invention, in which the area where the first opening and the suction slit overlap is blocked by the second blocking portion, and (a) and (b) are cross-sectional views of a state in which the areas of the open surfaces have different opening rates.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the attached drawings so that a person skilled in the art can easily implement the present invention.

Referring to FIGS. 1 to 8, the vacuum cleaner head according to the present invention relates to a vacuum cleaner head capable of cleaning a wide area with strong suction power by reducing the area on which the suction power is applied and strengthening the suction power while moving the location of the area on which the suction power is applied so that the suction power is applied to the entire suction slit (310).

A first opening (110) for sucking in foreign substances and a first blocking portion (120) for blocking the inflow of foreign substances are alternately arranged, and a first rotor (100) rotated by a rotary motor (130);

A second rotor (200) arranged inside the first rotor (100), having the same rotational axis as the first rotor (100) and rotating synchronously with the first rotor (100), and having a second opening (210) for sucking in foreign substances and a second blocking portion (220) for blocking the inflow of foreign substances alternately arranged;

It includes a head casing (300) in which a suction pipe (330) is formed to move foreign substances sucked into the interior to a dust collector, and a suction slit (310) through which the first rotor (100) and the second rotor (200) are exposed.

Depending on the type and characteristics of the foreign substance, the adhesive strength attached to the surface to be cleaned varies, and if the foreign substance is sticky or strongly adhered to the surface to be cleaned, a stronger suction force is required to suck up the foreign substance. However, it is inevitable that a suction motor that functions with strong suction force has a large weight and volume.

Accordingly, the present invention reduces the area over which suction force is generated in order to improve suction power with the same suction motor without increasing the output of the suction motor, thereby concentrating the suction power more on that area, so that foreign substances strongly adhered to the surface to be cleaned can be removed and suctioned, and the location of the area over which suction power is concentrated is varied so that enhanced suction power can be applied to all areas touched by the head of the present invention.

To this end, the vacuum cleaner head of the present invention has a suction slit (310) formed in the head casing (300) forming the outer shape, through which foreign substances are introduced, and the first blocking portion (120) of the first rotor (100) inserted into the interior of the head casing (300) blocks a portion of the area of the suction slit (310) so that foreign substances can be sucked into the interior only through the first opening (110). Accordingly, the suction force is not applied to the suction slit (310) blocked by the first blocking portion (120), and the suction force of the suction motor is concentrated in the area where the first opening (110) and the suction slit (310) overlap, so that a stronger suction force is applied, thereby allowing even foreign substances with strong adhesiveness to be separated from the surface to be cleaned and sucked in.

In addition, as the first rotor (100) rotates, the position of the area where the first opening (110) and the suction slit (310) overlap is changed, but the entire area of the suction slit (310) overlaps the first opening (110). Therefore, as the first rotor (100) rotates, the enhanced suction force acts on the entire area of the suction slit (310), so that a suction motor with the same capacity (output) can exhibit a more powerful suction performance, and there is an effect in which the area for sucking foreign substances is not reduced but is preserved as is.

Furthermore, the head of the present invention has a second rotor (200) accommodated inside the first rotor (100), so that the first opening (110) of the first rotor (100) is covered by the second blocking portion (220) of the second rotor (200), thereby reducing the suction area. Therefore, the suction force is further amplified in the area where the first opening (110) and the second opening (210) of the second rotor (200) overlap. The suction force is further amplified because the first blocking portion (120) of the first rotor (100) covers a portion of the area of the suction slit (310), and the second blocking portion (220) of the second rotor (200) covers the first opening (110) of the first rotor (100). And, the user can control the degree of amplification of the suction force by adjusting the range in which the second blocking portion (220) covers the first opening (110) by reciprocating the second rotor (200) in the axial direction.

The vacuum cleaner head according to the present invention sweeps over the surface to be cleaned and sucks in foreign substances (objects to be cleaned) such as hair and dust present on the surface to be cleaned through the suction slit (310) of the head casing (300). The suction force is generated by a suction motor provided in the main body of the cleaner and applied to the suction slit (310). In addition, the foreign substances are sucked in an area overlapping the first opening (110) of the first rotor (100), the second opening (210) of the second rotor (200), and the suction slit (310).

The present invention relates to a head for sucking up foreign substances by coming into contact with a surface to be cleaned in a vacuum cleaner. The vacuum cleaner to which the present invention is applied may be a corded vacuum cleaner or a cordless vacuum cleaner, and the present invention may also be applied to a robot vacuum cleaner without modifying the spirit of the present invention.

Referring to FIGS. 1 and 2, the head casing (300) forming the outer shape of the vacuum cleaner head of the present invention has a suction slit (310) formed on the lower surface to suck foreign substances into the interior through the suction slit (310), and the foreign substances sucked into the interior are moved to a dust collector through a suction pipe (330) formed at the rear end of the head casing (300).

The above suction slit (310) is a passage through which foreign substances are introduced, and since it comes into contact with the surface to be cleaned and sucks up foreign substances, it is preferable to form it with a large surface area so that a large amount of foreign substances can be sucked up for cleaning efficiency. Normally, when a user cleans, the vacuum cleaner head is pushed forward, so in order to clean a large area in one forward movement, the suction slit (310) is formed with a wide width in a direction perpendicular to the moving direction of the vacuum cleaner head. Accordingly, since the suction slit (310) is formed wide in the axial direction indicated in FIG. 1, a large area can be cleaned in one forward movement with strong suction power. The axial direction illustrated in FIG. 1 means the axis along which the first rotor (100) and the second rotor (200) rotate. In addition, the spline (140) protrudes in the rotational axis direction of the first rotor (100) and the second rotor (200), so that the second rotor (200) slides in the axial direction.

When the first rotor (100) and the second rotor (200) are assembled inside the head casing (300), the parts entering and exiting the head casing (300) are the suction slit (310) and the suction pipe (330). Foreign substances from the outside are introduced inside through the suction slit (310), and foreign substances from the inside of the head casing (300) are discharged to the outside (dust collector) through the suction pipe (330).

The above head casing (300) is formed with a sliding member (320) that guides the opening/closing regulator (270) to reciprocate in the width direction (axial direction shown in FIG. 1) of the suction slit (310). The opening/closing regulator (270) is provided on the second rotor (200), but is fitted into the sliding member (320) so as not to rotate together with the second rotor (200). The sliding member (320) is formed in a step shape to prevent the opening/closing regulator (270) from rotating even when it receives the rotational force of the second rotor (200).

Referring to FIGS. 1, 3, and 6, a first rotor (100) is fitted inside the head casing (300). The first rotor (100) is formed in a cylindrical shape that forms an empty space inside, with a configuration for reducing the area of the suction slit (310) to enhance suction force.

On the outer surface of the first rotor (100), a first opening (110) is formed to allow foreign substances to enter and exit the inside and outside of the first rotor (100), and a first blocking portion (120) is formed to block foreign substances from entering and exiting the inside and outside of the first rotor (100). The first opening (110) and the first blocking portion (120) are arranged alternately.

And the first opening (110) and the first blocking portion (120) are continuously formed in a spiral shape along the outer surface of the first rotor (100).

As the first blocking portion (120) reduces the open area of the suction slit (310), the suction force generated by the suction motor does not act on the entire area of the suction slit (310), but acts only on the area not blocked by the first opening (110) and the second opening (210) described later.

The above first rotor (100) rotates by receiving power from a rotary motor (130). The rotary motor (130) can be placed inside or outside the head casing (300) and can transmit power to the first rotor (100) through a pulley or directly.

Since the first opening (110) and the first blocking portion (120) are formed in a spiral shape, the position where they overlap with the suction slit (310) changes as the first rotor (100) rotates by the rotary motor (130). As the first rotor (100) rotates, the position where the first blocking portion (120) blocks the suction slit (310) changes, and the position of the area where the first opening (110) and the suction slit (310) overlap changes. At a certain moment, the area where the first opening (110) and the suction slit (310) overlap is a part of the entire area of the suction slit (310), but as the first rotor (100) rotates, the area where the first opening (110) and the suction slit (310) overlap covers the entire area of the suction slit (310).

The first rotor (100) is formed with a spline (140) that transmits rotational power to the second rotor (200). The spline (140) is formed to protrude in the axial direction along which the first rotor (100) rotates, and is fixedly connected to the first rotor (100), so that the spline (140) rotates together with the first rotor (100). The shape of the spline (140) is formed in a cross shape as an embodiment of the present invention, but may also have a shape that is rotated in the direction of rotation by a boss (250) formed on the second rotor (200) but moves in the axial direction.

As illustrated in FIGS. 1, 4, and 6, the second rotor (200) is a rotor for further reducing the suction area by additionally covering the first opening (110) of the first rotor (100) to amplify the suction force. According to one embodiment of the present invention, the second rotor (200) is accommodated inside the first rotor (100) so that the first rotor (100) surrounds the second rotor (200), but in another embodiment, the first rotor (100) may be accommodated inside the second rotor (200).

The second rotor (200) is provided with a second opening (210) that allows foreign substances to enter and exit the inside and outside of the second rotor (200), and a second blocking portion (220) that prevents foreign substances from entering and exiting the inside and outside of the second rotor (200). The second opening (210) and the second blocking portion (220) are arranged alternately.

The second opening (210) and the second blocking portion (220) are continuously formed in a spiral shape along the outer surface of the second rotor (200).

A boss (250) into which the spline (140) is inserted is formed on one side of the second rotor (200). The boss (250) forms a structure that engages with the spline (140) in the rotational direction, and transmits the rotation of the spline (140) to the second rotor (200). Therefore, when the first rotor (100) rotates by receiving power from the rotary motor (130), the second rotor (200) also rotates through the spline (140).

As one embodiment of the present invention, the rotary motor (130) rotates the first rotor (100) and transmits rotational power to the second rotor (200) through the spline (140). However, as another embodiment, the second rotor (200) may be rotated and the rotational power may be transmitted to the first rotor (100) through the spline (140).

The boss (250) is rotated along the spline (140) to transmit rotational power to the second rotor (200), but slips in the axial direction. Accordingly, the second rotor (200) moves relative to the first rotor (100).

In order to move the second rotor (200), the second rotor (200) is equipped with an opening/closing regulator (270). As shown in FIG. 4, a coupling pin (271) is formed on the opening/closing regulator (270), and the coupling pin (271) is inserted into a coupling hole (260) formed at one end of the second rotor (200), and a coupling step (272) is formed on the coupling pin (271) so that the coupling pin (271) does not fall out of the coupling hole (260). The coupling step (272) is formed with a larger diameter than the coupling hole (260) so that it cannot pass through the coupling hole (260).

When the above-mentioned opening/closing regulator (270) is moved, the second rotor (200) slides in the axial direction as shown in Fig. 6. At this time, even if the second rotor (200) is moved in the axial direction, it forms a locking structure with the first rotor (100) in the rotational direction, so that the second rotor (200) rotates together with the first rotor (100).

The above-mentioned opening/closing regulator (270) is independent of the rotation of the second rotor (200) and does not receive the rotational power of the second rotor (200). The opening/closing regulator (270) and the second rotor (200) are pin-connected, but a slight amount of play is provided or a bearing is installed, so that even if the second rotor (200) rotates, the opening/closing regulator (270) does not rotate and is positioned in the sliding member (320) of the head casing (300).

As illustrated in FIG. 5, the second blocking portion (220) of another embodiment of the second rotor (200) accommodated inside the first rotor (100) may extend in thickness into the inside of the second rotor (200) to fill the center thereof. In this shape, the second opening (210) is a hollow surface (240) that continues to be empty all the way to the inside, and the second blocking portion (220) becomes a body surface (230) that is filled all the way to the inside. Here, the second opening (210) and the second blocking portion (220) denote the outer surface of the second rotor (200), and the hollow surface (240) and the body surface (230) denote the inner space of the second rotor (200).

Foreign substances that have entered the interior of the rotor through the second opening (210) move along the boundary of the body surface (230) of the second blocking portion (220) to the hollow surface (240), thereby preventing the foreign substances from being quickly discharged to the suction pipe (330) and from being held inside the second rotor (200) by guiding the foreign substances to the shortest flow path within the second rotor (200).

At this time, the body surface (230) may not be completely filled up to the center (rotation axis) of the second rotor (200), but may form a surface that is the boundary between the edge of the hollow surface (240) and the body surface (230), and the center may be partially excluded. The cross section of the body surface (230) may be formed in a square or triangular shape.

When the second rotor (200) is accommodated inside the first rotor (100), the second blocking part (220) is pressed so that there is no clearance with the first blocking part (120). That is, the outer surface of the second blocking part (220) is pressed so that there is no clearance with the first blocking part (120). If clearance occurs between the first blocking part (120) and the second blocking part (220), suction power leaks through the gap, making it difficult to amplify the suction power through reduction of the open area, which is an effect of the present invention. However, even if the first blocking part (120) and the second blocking part (220) are pressed so that slippage is allowed, the second rotor (200) moves relative to the first rotor (100).

The head according to the present invention strengthens the suction force by concentrating it on a certain area rather than evenly distributing the suction force generated by the suction motor over the entire area of the suction slit (310) and changes the location of the area where the suction force acts so as to cover the entire area of the suction slit (310).

To this end, a portion of the area of the suction slit (310) is closed by the first blocking portion (120), so that the suction power of the suction motor is concentrated only in the area where the suction slit (310) and the first opening (110) overlap, thereby sucking in foreign substances with a more enhanced suction power.

And by rotating the first rotor (100), the area where the first blocking portion (120) closes the suction slit (310), and the area where the suction slit (310) and the first opening (110) overlap, cover the entire area of the suction slit (310). Here, the term 'cover' is used to mean that a specific area is a part of the suction slit (310) at some moment, but the entire area of the suction slit (310) is scanned as the first rotor (100) rotates.

Since the shape of the first rotor (100) is fixed, the area where the first opening (110) and the suction slit (310) overlap does not change. Therefore, even if the suction force is strengthened by the first blocking portion (120) covering a part of the suction slit (310), the strengthened suction force does not change and has a fixed value.

In order to strengthen the suction force and control the degree of amplification thereof, the present invention provides a second rotor (200) inside the first rotor (100) as shown in FIGS. 6 and 8. The second rotor (200) further reduces the area where the first opening (110) and the suction slit (310) overlap through the second blocking portion (220) to further amplify the suction force, and by varying the area where the reduction occurs, the degree of amplification of the suction force is controlled. For reference, in this specification, the enhancement of the suction force by the first blocking portion (120) covering the suction slit (310) is expressed as 'strengthening', and the enhancement of the suction force by the second blocking portion (220) covering the area where the first opening (110) and the suction slit (310) overlap is expressed as 'amplification'.

And as illustrated in FIGS. 7 and 8, an area in the entire area of the suction slit (310) where the suction of foreign substances is blocked by at least one of the first blocking portion (120) or the second blocking portion (220) is referred to as a blocking surface (312), and an area where the suction of foreign substances is performed because the entire area of the suction slit is not covered by either the first blocking portion (120) or the second blocking portion (220) is referred to as an open surface (311). The open surface (311) is an area where the first opening (110) and the second opening (210) overlap and is located within the suction slit (310). In addition, the position of the open surface (311) changes as the first rotor (100) and the second rotor (200) rotate or according to the axial position of the second rotor (200). The blocking surface (312) is a darkly shaded area in the drawing, and the open surface (311) is a shallower shaded area than the blocking surface (312) in the drawing. The blocking surface (312) and the open surface (311) are shaded in one area in the drawing, but this is for the convenience of illustration, and the blocking surface (312) and the open surface (311) are formed in the entire area of the suction slit (310).

While the first rotator (100) rotates, the area of the first blocking portion (120) covering the suction slit (310) is fixed, while the second blocking portion (220) can vary the area of the open surface (311), so that the degree of amplification of the suction power is adjusted. Accordingly, if the user wants to obtain a stronger suction power by considering the characteristics and adhesiveness of foreign substances attached to the surface to be cleaned, the user can proceed with cleaning by further reducing the area of the open surface (311).

In the present invention, an opening/closing controller (270) is provided to control the area of the open surface (311), and the user controls how much of the area where the second blocking portion (220) overlaps the first opening (110) and the suction area is covered by the opening/closing controller (270).

First, the opening/closing regulator (270) is fitted into the sliding member (320) and moves axially back and forth. As the opening/closing regulator (270) moves, the position of the second rotor (200) moves so that the second blocking portion (220) covers the area where the first opening (110) and the suction slit (310) overlap. Accordingly, the area of the open surface (311), which is the area of the suction slit (310) where neither the first blocking portion (120) nor the second blocking portion (220) is covered, is reduced, and since the suction force acts only on the reduced open surface (311), the suction force can be further amplified. The user can select how much to reduce the area of the open surface (311) by considering the strength of the suction force to be amplified.

At this time, the above-mentioned opening/closing regulator (270) can be moved back and forth by the user's hand, or can be controlled electrically using an actuator, motor, etc. In the case of controlling the opening/closing regulator (270) electrically, it is preferable to have an operating button (not shown) for controlling the electric device around a handle (not shown) having a vacuum cleaner control button.

In the case of manually adjusting the opening/closing regulator (270), a structure such as a bolt passing through or a structure for extracting a blade from a cutter knife can be used to fix the opening/closing regulator (270) to the adjusted position. This prevents the opening/closing regulator (270) adjusted manually or electrically from changing its position due to interference from vibrations generated during cleaning.

As a specific usage form of the second rotor (200), as shown in Fig. 7, the second blocking portion (220) may be in a state where the first opening (110) is not covered. The first blocking portion (120) of the first rotor (100) covers a part of the suction slit (310), and the second blocking portion (220) does not cover the area where the first opening (110) and the suction slit (310) overlap. The open surface (311) becomes the area where the first opening (110) and the suction slit (310) overlap, so that the suction force is concentrated and strengthened.

In another usage form, as shown in Fig. 8, the area where the first opening (110) and the suction slit (310) overlap may be partially covered by the second blocking portion (220). The area covered by the second blocking portion (220) is adjusted according to the degree to which the user amplifies the suction power. Fig. 7(b) is a usage form in which the area of the open surface (311) is further reduced compared to Fig. 7(a). In the case of Fig. 7(b), the suction power is further amplified compared to Fig. 7(a).

In this way, the present invention focuses the suction force on the area where the first opening (110) and the suction slit (310) overlap by covering a portion of the suction area with the first blocking portion (120), and the extent to which the enhanced suction force is amplified can be controlled by the user adjusting the extent to which the second blocking portion (220) covers the overlapping area.

And, the first rotor (100) and the second rotor (200) rotate with the power of the rotary motor (130), so that the position of the open surface (311) covers the entire area of the suction slit (310), so that an effect of strengthened and amplified suction force is generated over the entire area of the suction slit (310), and the user can conveniently perform cleaning with strong suction force.

100: 1st rotor 110: 1st opening 120: 1st blocking part 130: Rotating motor 140: Spline
200: Second rotor 210: Second opening 220: Second blocking part 230: Body surface 240: Hollow surface
250: Boss 260: Joint 270: Open/close regulator 271: Joint pin 272: Joint step
300: Head casing 310: Suction slit 311: Open surface 312: Blocking surface
320: Sliding hole 330: Suction tube

Claims (7)

A first opening (110) for sucking in foreign substances and a first blocking portion (120) for blocking the inflow of foreign substances are alternately arranged, and a first rotor (100) rotated by a rotary motor (130);
A second rotor (200) arranged inside the first rotor (100), having the same rotational axis as the first rotor (100) and rotating synchronously with the first rotor (100), and having a second opening (210) for sucking in foreign substances and a second blocking portion (220) for blocking the inflow of foreign substances alternately arranged;
A head casing (300) is formed with a suction pipe (330) that moves foreign substances sucked inside to a dust collector, and a suction slit (310) through which the first rotor (100) and the second rotor (200) are exposed;
The overlapping area of the first opening (110) and the second opening (210) is changed within the suction slit (310) depending on the axial position of the second rotor (200).
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In the first paragraph,
A spline (140) that transmits rotational power to the second rotor (200) is formed on the first rotor (100);
The above second rotor (200) is moved in the axial direction of the spline (140) by an external force.
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In the second paragraph,
A boss (250) into which the spline (140) is inserted is formed in the second rotor (200);
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In the first paragraph,
A joining hole (260) is formed at one end of the second rotor (200);
An opening/closing regulator (270) is provided, in which a joining pin (271) is formed to be inserted into the above joining hole (260);
The above second rotor (200) slides within the first rotor (100) by an external force applied to the opening/closing regulator (270).
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In paragraph 4,
A sliding member (320) that guides the reciprocating movement of the opening/closing regulator (270) is formed in the above head casing (300).
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In the first paragraph,
The second blocking portion (220) covers the area where the first opening (110) and the suction slit (310) overlap due to the axial movement of the second rotor (200);
In the above suction slit (310) area, the foreign substance is sucked in through the open surface (311), which is an area that is not covered by either the first blocking section (120) or the second blocking section (220);
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In the first paragraph,
The above first rotor (100) and second rotor (200) are cylindrical in shape,
The first opening (110) and the second opening (210) have a spiral shape.
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