RU2364310C1 - Unit of dust head for vacuum cleaner (versions) - Google Patents

Abstract

FIELD: items of private and domestic use. ^ SUBSTANCE: unit of dust head is provided for usage in vacuum cleaner and contains head case, allowing contaminations suction port, rotary drum, located in head case with ability of rotation and allowing projections, implemented on its outside peripheral surface and allowing form, selected from group, containing in essence form of bars, hone or loop, and also its any combination, and element restricting rotation for limitation of rotary drum rotation. At movement of head case by treated surface drum is brought into rotation by frictional force of projections by treated surface. In version of implementation unit of dust head contains head case, allowing contaminations suction port, couple of rotary drums, which are located in head case with ability of rotation and each of them allows projections, implemented on its external peripheral surface, and restricting rotation component for limiting of rotation of each of pairs of rotary drums. At movement of head case by treated surface couple of drums is brought into rotation by frictional force of projections by treated surface. Rotation restricting component is implemented with providing of rotation ability of drum from couple and with prevention of rotation of the second drum, when head case id moved in none direction, and with providing of rotation ability of the second drum and with prevention of the first drum rotation, when head case is moved backwards. ^ EFFECT: providing of effective removing from treated surface of thin contaminations. ^ 11 cl, 22 dwg

Description

BACKGROUND OF THE INVENTION

Technical field

This invention relates to a vacuum cleaner, and in particular to a suction nozzle assembly for a vacuum cleaner.

Description of the prior art

Typically, a vacuum cleaner contains a suction nozzle assembly that, together with air, can draw contaminants from a surface to be cleaned.

The suction nozzle assembly has a dirt-suction hole that faces the surface to be cleaned and draws dirt from it. When working in a vacuum cleaner with a vacuum generator, which ensures the creation of a suction force, the impurities present on the surface being cleaned are drawn in through the impurity suction hole. The term “contaminants” is used herein in a collective sense to refer to dust, dirt, particles, debris, and other similar material that may be entrained by the vacuum cleaner with the air drawn in.

However, when cleaning a surface such as a carpet, using only a suction force may be ineffective to remove fine dirt such as human hair, pet hair, etc. For the effective removal of human hair, pet hair, etc. it is preferable that such contaminants can be collected in a lump and then directed to the contamination suction hole.

SUMMARY OF THE INVENTION

The present invention is proposed to eliminate the above disadvantages and other problems associated with a conventional device. An aspect of the present invention is to provide a suction nozzle assembly for a vacuum cleaner that efficiently draws in fine impurities, such as human hair, pet hair, etc., from a surface to be cleaned.

The aforementioned aspect and / or other property of the present invention can essentially be achieved by providing a suction nozzle assembly for a vacuum cleaner that includes a nozzle body having a dirt-suction hole and a rotary drum located rotatably at the dirt-suction hole of the nozzle body and having protrusions formed on its outer peripheral surface, and when the nozzle body moves along the surface to be cleaned, the drum is driven into rotation by the friction force of the indicated heights UPOV on the surface to be cleaned.

In addition, the suction nozzle assembly may comprise a rotation restricting member designed to limit rotation of the drum.

The rotation restricting member may be configured to allow the drum to rotate in only one direction.

The rotation restricting element may comprise a ratchet wheel integral with the drum and a ratchet dog located in the nozzle body to ensure that the ratchet wheel rotates in only one direction.

The rotation restricting member may be configured to allow rotation of the drum as the nozzle body advances forward.

In addition, a rotation restricting member may be configured to rotate the drum clockwise and counterclockwise within a predetermined angle.

The rotary drum may include a housing and a cleaning element located on the drum housing and having protrusions.

The protrusions can be made essentially in the form of rods, bars or loops.

The protrusions can be made essentially in the form of a bar, and some of them can be made essentially in the form of a bar with grooves.

The suction nozzle assembly may include a brush rotatably located on one side of the rotary drum in the nozzle body.

In accordance with another aspect of the present invention, the suction nozzle assembly for a vacuum cleaner may include a nozzle body having a dirt-sucking hole and a pair of rotary drums that are rotatably located at the dirt-sucking hole of the nozzle body and have protrusions formed on its outer peripheral surface, and when the nozzle body moves along the surface to be cleaned, a pair of drums is driven into rotation by the friction force of these protrusions on the surface to be cleaned surface.

The suction nozzle assembly may comprise a rotation restricting member for restricting the rotation of each of the pair of rotary drums.

The rotation restricting member may be configured to allow rotation of the first drum from the pair and to prevent rotation of the second drum when the nozzle body moves in one direction, and to enable rotation of the second drum and to prevent rotation of the first drum when the nozzle body moves in the opposite direction .

The rotation restricting element may comprise a ratchet wheel integral with each of the pair of rotary drums and a ratchet dog located in the nozzle body to limit rotation of the ratchet wheel.

Other objectives, advantages and characteristic properties of the present invention will be apparent from the following detailed description with reference to the accompanying drawings of preferred embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and / or other aspects and advantages of the present invention will be apparent and more apparent from the following description of embodiments discussed in conjunction with the accompanying drawings, in which:

1 is a partial perspective view of a vertical type vacuum cleaner together with a suction nozzle assembly in accordance with an exemplary embodiment of the present invention;

figure 2 depicts a bottom view of a vacuum cleaner of the vertical type shown in figure 1;

figure 3 depicts a section of the brush block node of the suction nozzle shown in figure 2, along the line III-III;

FIGS. 4A and 4B are cross-sectional views of another rotation restricting member used in the rotary drum shown in FIG. 3, FIG. 4A illustrates the drum in a rotational state and FIG. 4B illustrates the drum in a state where rotation is not possible.

figure 5 depicts a section of another limiting rotation of the element used in the drum shown in figure 3;

figa and 6B depict views in perspective view of the housing of the rotary drum shown in figure 3;

Fig.7 depicts a perspective view of a removing element of the rotary drum shown in Fig.3;

FIG. 8 is an enlarged perspective view of a portion of a removal member shown in FIG. 7 in a circle X;

figa-9F depict partial views in perspective of various protrusions of the removing element of the rotary drum shown in figure 3;

figure 10 depicts a perspective view of another removing element of the rotary drum shown in figure 3;

11 is a bottom view of a suction nozzle assembly in accordance with another embodiment of the present invention;

12 is a bottom view of a suction nozzle assembly in accordance with yet another embodiment of the present invention;

figa and 13B depict schematic views illustrating the operation of the rotary drum shown in Fig;

Fig.14 depicts a schematic conceptual view of the node of the suction nozzle shown in Fig.12, containing another limiting rotation of the element.

It should be understood that in all the drawings, the same reference numbers indicate the same parts, assemblies, and structures.

DETAILED DESCRIPTION OF EXAMPLE OPTIONS

Below is a detailed description of some, given as an example of embodiments of the present invention with reference to the accompanying drawings.

The terms defined in this description, for example the detailed design and elements, contribute to a comprehensive understanding of the present invention. Thus, it is obvious that the present invention can be carried out without these specific concepts. In addition, well-known functions or constructions have been removed for clarity and conciseness in describing exemplary embodiments of the present invention.

Figure 1 depicts a perspective view of the node 1 of the suction nozzle in accordance with a variant implementation of the present invention, which is located in a vacuum cleaner of a vertical type, and figure 2 depicts a bottom view of the node 1 shown in figure 1.

In accordance with FIGS. 1 and 2, the suction nozzle assembly 1 for a vacuum cleaner in accordance with an embodiment of the present invention comprises a nozzle body 2 and a brush unit 10.

The nozzle body 2 is made with a dirt suction channel (not shown). The brush unit 10 is located at the front end of the nozzle body 2. In addition, the body 2 of the nozzle is made with a pair of wheels 4, providing movement of the node 1 on the surface to be cleaned. The nozzle body 2 is connected to the vacuum cleaner body 5.

This embodiment relates to a suction nozzle assembly 1 used in a vertical type vacuum cleaner. Thus, when a vacuum generator (not shown) located in the housing 5 of the vertical type vacuum cleaner creates a suction force, the dirt is drawn from the surface to be cleaned through the dirt suction hole 14 of the block 10.

Block 10 is located at the front end of the nozzle body 2. On the lower surface of the brush unit 10, a dirt suction hole 14 is made, which is in fluid communication with the dirt suction channel of the nozzle body 2. In this case, the block 10 can be configured to rotate relative to the body 2 of the nozzle by a predetermined angle.

In accordance with figure 2 and 3, the brush unit 10 comprises a brush 13, a rotary drum 20 and a casing 11.

At the suction soiling of the opening 14 of the casing 11, a brush 13 is located rotatably, which contains a plurality of bristles made on its surface to come into contact with the surface being cleaned. Therefore, when the brush 13 is rotated, dirt can be removed from the surface being cleaned.

In front of the brush 13, a rotary drum 20 is rotatably located in the casing 11, which collects fine impurities, such as human hair, animal hair, etc., from the surface being cleaned into a lump, and then directs it to the brush 13. The rotary drum 20 contains a limiting rotation of the element 29, the housing 50 (see Fig.6A) and the cleaning element 60 (see Fig.7).

The rotation restricting member 29 can be configured to allow the drum 20 to rotate in the first direction and to prevent it from rotating in the opposite direction to the first, depending on the direction of movement of the assembly 1. Alternatively, the rotation restricting member 29 can be configured to allow rotation in both directions within a given angle. The rotation restricting member 29 may be located at least on one side of the drum body 50.

FIG. 3 shows a ratchet mechanism 30 as one example of a rotation restricting member 29, wherein this ratchet mechanism is configured to rotate the drum 20 in only one direction. The ratchet mechanism 30, shown in FIG. 3, comprises a ratchet wheel 31 coaxially with the drum 20 for rotation in one piece with it, and a ratchet dog 33, which is located on one side of the ratchet wheel 31 either in the housing 11 or in the housing 2 nozzles. The ratchet dog 33 is rotationally prevented despite rotation of the drum 20.

The ratchet wheel 31 is made with many inclined teeth 32 located on its outer peripheral surface. When the ratchet wheel 31 senses a force in the direction of inclination of each of the teeth 32, the teeth 32 are not engaged with the ratchet dog 33, while the ratchet wheel 31 can rotate. When the ratchet wheel 31 receives the force in the opposite direction, the vertical side 32a of any of the teeth 32 of the ratchet wheel 31 engages with the ratchet dog 33 so that the ratchet wheel 31 cannot rotate. In other words, the rotary drum 20 can rotate in the direction of the inclined surface 32b of the teeth 32 of the ratchet wheel 31, but cannot rotate in the opposite direction. Thus, FIG. 3 shows a ratchet wheel 31, which is clockwise (in the direction of arrow B) engaged with the dog 33, while the drum 20 does not rotate, but in a counterclockwise direction (in the opposite direction arrow B) the ratchet wheel 31 is not engaged with the ratchet dog 33, while the rotary drum 20 rotates. In other words, as shown in FIG. 3, when the node 1 is advanced forward (in the direction of arrow A), the drum 20 rotates counterclockwise, as shown by arrow B. However, when the node 1 is pulled back (in the opposite direction to arrow A), the drum 20 does not rotate.

4A and 4B show another ratchet mechanism 40 as a rotation restricting member. 4A, the ratchet wheel 41 of the ratchet mechanism 40 is similar to the ratchet wheel 31 of the above ratchet mechanism 40, however, the ratchet dog 43 is configured to move up and down. Thus, when the ratchet wheel 41 receives the force in a clockwise direction, as shown in FIG. 4B by the arrow F, the vertical side 42a of any of the teeth 42 of the ratchet wheel 41 engages with the ratchet dog 43, so that the ratchet wheel 41 cannot rotate . When the ratchet wheel 41 receives the force in a counterclockwise direction (in the direction of arrow D) shown in Fig. 4A, the inclined sides of the teeth 42 of the ratchet wheel 41 are not engaged with the ratchet dog 43, while the ratchet wheel 41 can rotate.

In the above statement, the ratchet mechanisms 30 and 40 are configured so that when the unit 1 is advanced forward (in accordance with arrows A and C in FIGS. 3 and 4A), the drum 20 rotates and when the unit 1 is pulled back (in accordance with arrow E on figv), the drum 20 does not rotate. Alternatively, ratchet mechanisms 30 and 40 can be performed in the opposite way. In other words, the mechanisms 30 and 40 are designed so that when the node 1 is advanced forward, the drum 20 does not rotate, and when the node 1 is pulled back, the drum 20 rotates.

On the other hand, the rotation restricting member 29 may be configured such that the rotary drum 20 can rotate within a predetermined angle. In other words, the drum 20 cannot rotate continuously, but can rotate a predetermined angle in the first direction, and can also rotate in the opposite direction to the first direction by the same angle. Turning to FIG. 5, an example of an element 29 of the above construction is illustrated.

In accordance with Fig. 5, the element 29 comprises a rotary wheel 45 and a stop 46. The rotary wheel 45 is made coaxially with the rotary drum 20 to ensure rotation in one piece with it (see Fig. 2). Grooves 45a are formed on the outer peripheral surface of the rotating wheel 45, inside of which a stop 46 is located, which is attached to the casing 11 of the assembly 1 so that the stop 46 does not rotate when the drum 20 rotates. Thus, the rotation range of the wheel 45 is limited by a stop 46, which is located inside one of the grooves 45a of the wheel 45. In accordance with FIG. 5, the wheel 45 has five grooves 45a, and the stop 46 is located inside any of the five grooves 45a. Thus, the rotary drum 30, made in one piece with the wheel 45, can rotate clockwise and counterclockwise (in accordance with arrow G in FIG. 5) within a predetermined angle defined by the groove 45a of the wheel 45 and the stop 46.

The drum body 50 and 50 ′ may be in the form of a hexagonal column or a round cylinder, as shown in FIGS. 6A and 6B. The drum body 50 and 50 'may be removable or integrally with the ratchet wheel 31 and 41 or the rotary wheel 45 of the rotation restricting member 29. In this embodiment, the ratchet wheel 31 and 41 and the rotary wheel 45 are separate from the housing 50 and 50 'drum.

The cleaning element 60 collects fine impurities, such as human hair, animal hair, etc., from the surface being cleaned into a lump, and then directs the collected fine impurities to the dirt-sucking hole 14.

The cleaning element 60 is inserted into the drum body 50 and 50 'and is made of a base 61 and a plurality of protrusions 62. The base 61 is made in the form of a hexagonal column or a round cylinder corresponding to the shape of the drum body 50 and 50'. Figures 7 and 10 show a rotation restricting member 60 and 60 'with a hexagonal column base 61.

The protrusions 62 come into contact with the surface to be cleaned, collect fine impurities from the surface to be cleaned into a lump, and then direct it to the dirt-absorbing hole 14 (see FIG. 2). The protrusions 62 can have a variety of forms that allow you to perform the above functions.

Turning now to FIG. 7, a cleaning member 60 is illustrated with a plurality of protrusions 62 having a substantially rod shape. A plurality of rod-shaped protrusions 62 may be arranged in various patterns. 7, a plurality of protrusions 62 are arranged in three rows on one side surface of the base 61 in the form of a hexagonal tubular member. In accordance with Fig. 8, each of the protrusions 62 is made in the form of a mountain peak with a ball. However, these are only exemplary embodiments that are not restrictive, therefore, the protrusions 62, which are essentially rod-shaped, can be made with any shape.

Turning to FIGS. 9A-9F, the protrusions 63, 64, 65, 66, 67, substantially in the form of a bar, are illustrated. As used herein, the term “bar shape” refers to the shape of the protrusions that extend upward from the base 61 in the form of an elongated rectangular parallelepiped. Many of the protrusions 63, 64, 65, 66, 67 and 68 in the form of a bar can be arranged in various patterns. In accordance with FIG. 9A, a plurality of bars 63 are parallel to the axis of rotation (see CL axis 2 and FIG. 7) of the rotary drum 20. According to FIG. 9B, the bars 64 are arranged in a substantially V-shape, and in accordance with FIG. 9C, the bars 65 are inclined relative to the center of rotation of the drum 20. In accordance with FIG. 90, the bars 66 are arranged in a row on one side surface of the hexagonal tubular base member 61. In this case, the bars 66 are symmetrically tilted to the center line 61a single side surface hex annogo tubular base member 61.

In accordance with FIGS. 9E and 9F, the protrusions 63 and 64 in the form of a bar are arranged in a similar manner to that shown in FIGS. 9A and 9B, except that some protrusions 67 and 68 are made in the form of a bar with grooves. As used herein, the term “grooved block” refers to the shape of a bar split into pieces in the direction of the length of the bar. 9E and 9F, each of the bars 67 and 68 is split into three parts, however, such a solution is provided only as an example of implementation and is not restrictive.

In addition, the plurality of protrusions 69 may be substantially loop-shaped, as illustrated in FIG. 10. 10, a plurality of hinge-shaped protrusions 69 are arranged in two rows on each side surface of the base 61 of the hexagonal tubular member.

In the above construction, the cleaning member 60 is separate from the drum brush 50. Alternatively, the cleaning member 60 may be integral with the drum body 50.

In addition, the cleaning element 60 may be made of an elastic material, such as rubber, urethane, etc. In particular, a plurality of protrusions 63, 64, 65, 66, 67, and 68 of the removal member may be made of felt.

In accordance with figure 2 and 3, the casing 11 supports the brush 13 and the rotary drum 20 to ensure rotation and has a dirt-suction hole 14, fluidly connected to the dirt-suction channel of the nozzle body 2.

The following is a description of the operation of the node 1 in accordance with an embodiment of the present invention with reference to FIGS. 2 and 3.

When the user turns on the vacuum cleaner and advances the assembly 1, that is, advances the brush unit 10 in the direction of the arrow A shown in FIG. 3, the brush 13 rotates, and the impurities are drawn into the assembly 1 from the surface being cleaned through the opening 14.

When the assembly 1 moves forward, the rotary drum 20 located in front of the brush 13 rotates counterclockwise (see arrow B) due to friction against the surface being cleaned. At this moment, the ratchet wheel 31 of the ratchet mechanism 30 of the rotary drum 20 is not engaged with the ratchet dog 33, therefore, the rotary drum 20 can rotate counterclockwise. When the drum 20 rotates counterclockwise, fine impurities on the surface being cleaned move to the brush 13.

However, when the user pulls the assembly 1, that is, pulls the brush unit 10 in the direction opposite to the arrow A shown in FIG. 3, the rotary drum 20 does not rotate. In other words, when the assembly 1 moves in the opposite direction of arrow A, the rotary drum 20 receives a force that causes it to rotate clockwise due to friction against the surface being cleaned. However, the ratchet wheel 31 of the ratchet mechanism 30 of the rotary drum 20 is engaged with the ratchet dog 33 so that the drum 20 cannot rotate in a clockwise direction and is held stationary. When pulling the node 1, when the rotary drum 20 is locked, many protrusions 63 of the drum 20 wipe the surface to be cleaned, collecting fine impurities, such as human hair, animal hair, etc. After collecting fine impurities through a plurality of protrusions 63 into a lump, the collected fine impurities are easily drawn into the suction soiling hole 14 due to the suction force.

In the above description, the assembly 1 comprises a brush 13, however, such a solution is provided only as an exemplary embodiment and is not restrictive. Alternatively, the assembly 1 according to an embodiment of the present invention may not include a brush 13.

11 is a bottom view of the suction nozzle assembly 100 for a vacuum cleaner without a brush.

In accordance with Fig. 11, the assembly 100 comprises a nozzle body 101 and a rotary drum 120. The housing 101 is made with a dirt-sucking hole 102 and supports the rotary drum 120 to provide rotation.

Contaminants are drawn into the suction port 102 by a suction force created by a vacuum generator (not shown). The dirt suction hole 102 may be configured such that dirt can be drawn in from the front and rear of the rotary drum 120, as shown in FIG. In other words, the rotary drum 120 may be located in the middle of the suction contamination of the hole 102.

In addition, although not shown, the dirt-sucking hole 102 can only be made in front of the rotary drum 120; alternatively, it can be performed only at the rear of the rotary drum 120.

Since the design and operation of the rotary drum 120 are similar to the design and operation of the rotary drum 20 of the assembly 1 in accordance with the above embodiment, their detailed description is not given.

12 is a bottom view of a suction nozzle assembly 200 of a vacuum cleaner in accordance with another embodiment of the present invention.

In accordance with Fig. 12, the node 200 in accordance with the presented embodiment of the invention comprises a nozzle body 201 and a pair of rotary drums 221 and 222.

The nozzle body 201 is made with a dirt suction channel (not shown) flowing in communication with the vacuum cleaner body (not shown). On the lower surface of the nozzle body 201, a dirt suction hole 202 is made through which the dirt is drawn.

In the opening 202 of the nozzle body 201, a pair of rotary drums 221 and 222 are rotated, which wipe the surface to be cleaned and cause fine dirt, such as human hair and / or animal hair, to collect in a lump on the surface to be cleaned and drawn into the hole 202. Thus, a pair of rotary drums 221 and 222 can be located in the middle of the hole 202, so that a maximum suction force can be applied between them.

Each of the pair of rotary drums 221 and 222 comprises a rotation restricting member 231 and 232, a housing, and a retracting member. The rotation restricting elements 231 and 232, the drum body and the cleaning element are similar to the elements of the above embodiment, therefore, their detailed description is not given.

However, rotation restricting members 231 and 232 of the suction nozzle assembly 200 in accordance with this embodiment are configured such that when one of the pair of rotary drums 221 and 221 rotates, the other rotary drum is stationary. On figa and 13B shows the design of limiting the rotation of the elements 231 and 232.

In accordance with FIGS. 12, 13A and 13B, the first rotation restricting member 231 is aligned with the first rotary drum 221, i.e., the front drum 221 of the pair of drums 221 and 222, and rotates the first rotary drum 221 counterclockwise (see arrow K in FIG. 13B), but prevents clockwise rotation. The second rotation restricting member 232 is aligned with the second rotary drum 222, that is, the rear drum of the pair of rotary drums 221 and 222, rotates the second rotary drum 222 clockwise (see arrow I in FIG. 13A) and prevents counterclockwise rotation .

Thus, if the first and second rotation restricting elements 231 and 232 constitute parts of the ratchet mechanism, as illustrated in FIGS. 13A and 13B, then the first ratchet wheel 233 of the first drum 221 is arranged to rotate counterclockwise and to prevent rotation clockwise. The second ratchet wheel 237, mounted coaxially with the second rotary drum 222, is arranged to provide clockwise rotation and prevent counterclockwise rotation.

The following is a description of the operation of the node 200 of the vacuum cleaner having the above construction, with reference to Fig.12, 13A and 13B.

13B illustrates the operation of the first and second rotation restricting members 231 and 232 located at each of a pair of rotary drums 221 and 222 when the assembly 200 is advanced.

When the user pushes the assembly 200 forward, as shown by arrow J in FIG. 13, the first and second rotary drums 221 and 222 tend to rotate counterclockwise due to friction against the surface being cleaned. The first rotation restricting member 231 allows the first rotary drum 221 to rotate counterclockwise (see arrow K), so that when the assembly 200 moves forward, the first rotary drum 221 rotates counterclockwise. However, the second rotation restricting member 232 prevents the second drum 222 from rotating clockwise, so that when the assembly 200 moves forward, the second rotary drum 222 is held stationary.

Since when the user moves the assembly 200 forward in the direction of arrow J, the second rotary drum 222 is held stationary, the plurality of protrusions 242 formed on the outer periphery of the second drum 222 wipe the surface to be cleaned, collecting fine dirt into a lump. At the same time, the first rotary drum 221 rotates counterclockwise, in the direction of arrow K, thereby pushing out the contaminants that must be collected in the lump using the second rotary drum 222 into the suction hole of the contamination 202. This circumstance leads to the effective retraction of fine impurities by the assembly 200.

On the other hand, FIG. 13A illustrates the operation of the first and second rotation restricting elements 231 and 232 located at each of the pair of rotary drums 221 and 222 when the user pulls the vacuum cleaner assembly 200 back.

When the user pulls the assembly 200 backward in the direction of arrow H, the first and second rotary drums 221 and 222 tend to rotate clockwise (see arrow I) due to friction against the surface being cleaned. The first rotation restricting member 231 prevents the rotation of the first rotary drum 221 clockwise, so that when the assembly 200 moves backward, the first rotary drum 221 is held stationary. However, the second rotation restricting member 232 allows the second drum 222 to rotate clockwise, so that when the assembly 200 moves backward, the second rotary drum 222 rotates clockwise.

Thus, since when the user pulls the assembly 200 back, in the direction of arrow H, the first rotary drum 221 is held stationary, the plurality of protrusions 241 formed on the outer periphery of the first drum 221 wipe the surface to be cleaned, collecting fine dirt into a lump. At the same time, the second rotary drum 222 rotates in a clockwise direction, in the direction of arrow I, thereby pushing out the contaminants that must be collected into the lump using the first rotary drum 221 into the dirt-sucking hole 202.

Thus, if the node 200 is made with a pair of rotary drums 221 and 222, as in this embodiment, one rotary drum 221 or 222 collects dirt, and the other rotary drum 222 or 221 pushes the collected dirt into the suction hole 202. Therefore, the node 200 with a pair of rotary drums 221 and 222 can more effectively draw fine dirt from the surface being cleaned than the node 1 with one rotary drum, as described above.

FIG. 14 is a conceptual view schematically illustrating an assembly 200 that includes a rotation restricting member different from that of the suction nozzle assembly shown in FIG. 12 with a pair of rotary drums 221 and 222.

In accordance with FIG. 14, a rotation restricting member in accordance with this embodiment comprises first and second rotation restricting parts 251 and 252 that are located in nozzle body 201 (see FIG. 12) and are designed to prevent rotation of the first and second rotary drums 261 and 262. Each of the first and second rotary drums 261 and 262 comprises a plurality of protrusions 261a and 262a that are inclined in the direction of rotation of the drum 261 and 262 and are made of felt. In other words, the plurality of protrusions 261a on the first rotary drum 261 are inclined so that when the first drum 261 rotates counterclockwise, the protrusions 261a are not captured by the first rotation restricting portion 251. The protrusions 262a on the second rotary drum 262 are inclined so that when the second drum 262 rotates clockwise, the protrusions 262a are not captured by the second rotation restricting part 252.

Thus, as illustrated in FIG. 14, when the user advances the assembly 200 (see FIG. 12) forward, in the direction of arrow L, the first and second rotary drums 261 and 262 perceive a force forcing them to rotate counterclockwise (see arrow M), the protrusions 261a of the first rotary drum 261 are not captured by the first rotation restricting portion 251, so that the first rotary drum 261 rotates counterclockwise. However, the protrusions 262a of the second rotary drum 262 are captured by the second rotation restricting part 252, so that the second rotary drum 262 does not rotate counterclockwise and is held stationary.

On the other hand, when the user pulls the assembly 200 back, the first and second rotary drums 261 and 262 experience a force forcing them to rotate clockwise, while the protrusions 261a of the first rotary drum 261 are gripped by the first rotation restricting portion 251, therefore, the first rotary drum 261 does not rotate counterclockwise and is held stationary. However, the protrusions 262a of the second rotary drum 262 are not captured by the second rotation restricting portion 252, therefore, the second rotary drum 262 rotates clockwise.

When the first and second drums 261 and 262 rotate in the direction of inclination of the protrusions 261a and 262a, the felt protrusions 261a and 262a on the outer peripheral surface of each of the first and second drums 261 and 262 are elastically deformed by the first and second rotation restricting parts 251 and 152, and then restored in the initial state. However, when the first and second drums 261 and 262 rotate in the direction opposite to the inclination of the protrusions 261a and 262a, the first and second rotation restricting parts 251 and 252 are caught in the lower portions of the protrusions 261a and 262a of the first and second drums 261 and 262, so that the drums 261 and 262 cannot rotate.

As described above, the suction nozzle assembly for a vacuum cleaner in accordance with an embodiment of the present invention comprises a rotary drum that can rotate due to friction against a surface to be cleaned while advancing and pulling off the suction nozzle assembly, which results in efficient retraction of fine impurities such as human hair, wool animals, etc., from the surface being cleaned.

The suction nozzle assembly for a vacuum cleaner in accordance with an embodiment of the present invention comprises a rotary drum that can rotate in one direction and remains stationary in the opposite direction, so that it can easily collect fine dirt into a lump on the surface to be cleaned and draw it into the lump subtle pollution.

The suction nozzle assembly for a vacuum cleaner in accordance with an embodiment of the present invention comprises a pair of rotary drums such that when the said assembly is advanced or retracted, one rotary drum rotates and the other remains stationary. Thus, the suction nozzle assembly can effectively draw fine dirt from the surface to be cleaned.

Although embodiments of the present invention have been described, those skilled in the art may make changes and modifications to these options that may appear to them as the basic concepts of the invention are understood. Thus, it is intended that the appended claims be construed as including the foregoing embodiments and all such changes and modifications that fall within the spirit and scope of the invention.

Claims (11)

1. The site of the suction nozzle for a vacuum cleaner containing
nozzle body having a dirt suction hole,
a rotary drum located rotatably in the nozzle body and having protrusions formed on its outer peripheral surface and having a shape selected from the group consisting essentially of the shape of the rods, bar or loop, as well as any combination thereof, and
a rotation restricting member for limiting rotation of the rotary drum,
moreover, when the nozzle body moves along the surface to be cleaned, the drum is driven into rotation by the friction force of these protrusions on the surface to be cleaned. 2. The assembly of claim 1, wherein the rotation restricting member is configured to rotate the drum in only one direction. 3. The node according to claim 2, in which the rotation-limiting element comprises a ratchet wheel integral with the rotary drum, and a ratchet dog located in the nozzle body to ensure that the ratchet wheel rotates in only one direction. 4. The node according to claim 3, in which the limiting rotation of the element is made with the possibility of rotation of the drum when moving the nozzle body forward. 5. The assembly according to claim 1, wherein the rotation restricting member is configured to rotate the drum clockwise and counterclockwise within a predetermined angle. 6. The node according to claim 1, in which the rotary drum comprises a housing and a cleaning element located on the drum housing and having protrusions. 7. The assembly according to claim 1, further comprising a brush located on one side of the rotary drum at the suction soiling of the nozzle body opening so as to rotate. 8. A suction nozzle assembly for a vacuum cleaner comprising a nozzle body having an impurity suction hole, a pair of rotary drums that are rotatable in the nozzle body and each of which has protrusions formed on its outer peripheral surface, and
a rotation restricting member for limiting the rotation of each of the pair of rotary drums,
moreover, when the nozzle body moves along the surface to be cleaned, a pair of drums is driven into rotation by the friction force of these protrusions on the surface to be cleaned,
wherein the rotation restricting member is configured to allow rotation of the first drum from the pair and to prevent rotation of the second drum when the nozzle body moves in one direction, and to enable rotation of the second drum and to prevent rotation of the first drum when the nozzle body moves in the opposite direction . 9. The assembly of claim 8, wherein the rotation restricting member comprises a ratchet wheel integral with each of the pair of rotary drums and a ratchet dog located in the nozzle body to limit rotation of the ratchet wheel. 10. The node of claim 8, in which each of the pair of rotary drums contains a housing and a cleaning element located on the drum housing and having protrusions. 11. The node of claim 10, in which the protrusions have a shape selected from the group containing essentially the shape of the rods, bar or loop, as well as any combination thereof.

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