ROTARY BRUSH, NOZZLE AND VACUUM CLEANER

Abstract

A rotary brush (20) for a cleaner (50) includes: a base member (21) having a first groove (21E), into which a cleaning body (24) is inserted, the base member being rotatable about a rotational axis; and a cap member (22) fixed to a first end portion of the base member in the axial direction and having a second groove (22E), into which the cleaning body (24) is also inserted. The cap member has a recessed portion (22C), into which a rotary member (16) is insertable.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Japanese patent application no. 2023-007465 filed on Jan. 20, 2023, the contents of which are fully incorporated herein by reference.

TECHNICAL FIELD

The techniques disclosed in the present specification relate to a rotary brush, a nozzle, and a vacuum cleaner (hereinafter, also referred to as simply “cleaner”).

BACKGROUND ART

Japanese Patent No. 3940910 discloses a rotary brush that comprises a rotary rotor, which is made of metal, and brackets, which are mounted on end portions of the rotary rotor. Cleaning bodies, such as blades or brushes, are inserted into helical-shaped grooves defined in the rotary rotor.

SUMMARY OF THE INVENTION

In Japanese Patent No. 3940910, the cleaning bodies are not provided on the brackets (cap members). More specifically, the cleaning bodies are not present at (along) the end portions of the rotary brush. However, if the cleaning bodies are not present at the end portions of the rotary brush, cleaning performance of the nozzle may decrease.

One non-limiting object of the present teachings is to disclose techniques for improving cleaning performance.

In one aspect of the present teachings, a rotary brush for a cleaner (e.g., a vacuum cleaner) may comprise: a base member having a first groove, into which a cleaning body is inserted, the base member being rotatable about a rotational axis; and a cap member fixed to a first end portion of the base member in the axial direction and having a second groove, into which the cleaning body is also inserted. The cap member may have a recessed portion, into which a rotary member is insertable.

Because the cleaning body or bodies may axially extend into and along the cap member, the axial length of the cleaning body or bodies can be increased without increasing the axial length of the rotary brush as compared to the above-noted prior art, thereby improving cleaning performance according to one or more of the techniques disclosed in the present specification.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an oblique view, viewed from the upper-left front, that shows a nozzle according to one embodiment of the present teachings.

FIG. 2 is a drawing, viewed from the left, of the nozzle according to the embodiment.

FIG. 3 is an oblique view, viewed from the lower-left rear, that shows the nozzle according to the embodiment.

FIG. 4 is an exploded, oblique view, viewed from the lower-left rear, that shows the nozzle according to the embodiment.

FIG. 5 is a drawing, viewed from below, of the nozzle according to the embodiment.

FIG. 6 is a drawing, viewed from below, of the nozzle according to the embodiment, in the state in which a lower case has been removed.

FIG. 7 is a drawing, viewed from below, of the nozzle according to the embodiment, in the state in which the lower case and a rotary brush have been removed.

FIG. 8 is an oblique view, viewed from the lower-right front, that shows the nozzle according to the embodiment, in the state in which the lower case and the rotary brush have been removed.

FIG. 9 is an oblique view, viewed from the upper-left front, that shows the rotary brush according to the embodiment.

FIG. 10 is an oblique view, viewed from the upper-right rear, that shows the rotary brush according to the embodiment.

FIG. 11 is a drawing, viewed from above, of the rotary brush according to the embodiment.

FIG. 12 is a drawing, viewed from the left, of the rotary brush according to the embodiment.

FIG. 13 is an oblique view, viewed from the upper-left front, that shows a left portion of the rotary brush according to the embodiment.

FIG. 14 is an oblique view, viewed from the upper-left front, that shows the left portion of the rotary brush according to the embodiment, in the state in which cleaning bodies have been removed.

FIG. 15 is an exploded, oblique view, viewed from the upper-left front, that shows a left portion of a rotary rotor and a bracket according to the embodiment.

FIG. 16 is an exploded, oblique view, viewed from the upper-right rear, that shows the left portion of the rotary rotor and the bracket according to the embodiment.

FIG. 17 is a cross-sectional view that shows the left portion of the rotary rotor and the bracket according to the embodiment.

FIG. 18 is an oblique view that shows a cleaner, which includes the nozzle according to the embodiment.

FIG. 19 is a cross-sectional view that shows a cleaner main body according to the embodiment.

DETAILED DESCRIPTION OF THE INVENTION

As was mentioned above, a rotary brush according to the present teachings may comprise: a base member having a first groove, into which a cleaning body is inserted, the base member being about a rotational axis; and a cap member fixed to a first end portion of the base member in the axial direction and having a second groove, into which the cleaning body is also inserted. The cap member may have a recessed portion (e.g., a through hole or blind hole), into which a rotary member (e.g., a drive shaft) is insertable.

According to the above-mentioned configuration, because the second groove is provided in the cap member, which is fixed to the first end portion of the base member, the cleaning body can be provided (extend) not only on (at, around, across) the base member but also on (at, around, across) the cap member. Because the cleaning body is present also on (at, around, across) the first end portion of the rotary brush, cleaning performance can be improved, because the cleaning body (or cleaning bodies in embodiments comprising a plurality of cleaning bodies disposed around the circumference of the base member) extend(s) over a greater axial length of the rotary brush than in an embodiment in which the cleaning body (bodies) ends (end) at the end of the base member. In addition, the recessed portion is provided in the cap member to receive the rotary member (drive shaft). Thus, when the rotary member, which is inserted into the recessed portion, rotates, the rotary brush rotates together therewith.

In one or more embodiments, the recessed portion may be provided such that it is recessed (it extends) from a first end surface of the cap member to the second (opposite) end portion of the cap member; e.g., the recessed portion is a through hole.

According to the above-mentioned configuration, the rotary member can be inserted into (and entirely through, if desired) the recessed portion, which is provided in the first end surface of the cap member.

In one or more embodiments, in the axial direction, the recessed portion and at least a portion of the second groove may overlap each other. In other words, a line extending radially from a center (rotational) axis of the cap member passes through both the recessed portion and the second groove.

According to the above-mentioned configuration, axial enlargement of the cleaning body (bodies) of the rotary brush is possible without axially extending the rotary brush.

In one or more embodiments, the first groove may be formed (extend) as far as (i.e. up to) the first end portion of the base member. The second groove may be formed (may extend) such that it connects with (e.g., abuts, is continuous with) the first groove.

According to the above-mentioned configuration, a single integral cleaning body is inserted into both the first groove and the second groove. In other words, the same (integral) cleaning body extends from the second groove into the first groove, thereby spanning the first and second grooves. Herein, the term “integral” means one continuous piece without a break.

In other words, one cleaning body may be inserted across one first groove and one second groove. In embodiments containing a plurality of cleaning bodies disposed around the circumference of the base member and engaged (fixed) in respective first grooves and second grooves, each of the cleaning bodies extends across a respective first groove and second groove.

According to the above-mentioned configuration, an increase in the number of the cleaning bodies (the part count) is curtailed.

In one or more embodiments, the first groove may be formed (extend) such that at least a portion thereof is bent or curved along the axial direction. The second groove may be formed (extend) in a straight shape.

According to the above-mentioned configuration, the cleaning body is disposed (extends) in a straight shape at (along) the first end portion of the rotary brush.

In one or more embodiments, the second groove may be formed such that it extends (e.g., straight) in the axial direction.

According to the above-mentioned configuration, the cleaning body is disposed (extends) such that it extends in the axial direction at the first end portion of the rotary brush.

In one or more embodiments, the width of the second groove may be larger than the width of the first groove.

According to the above-mentioned configuration, assembly work efficiency when the cleaning body is inserted into the second groove can be increased, because the wider width of the second groove(s) enables the cleaning body (bodies) to be inserted into the cap member more easily.

In one or more embodiments, the cap member may comprise a cap-body part, in which the second groove is provided (defined); and a flange part, which is disposed at a first end portion of the cap-body part. A first end portion of the cleaning body may make contact with (contact, abut) the flange part in the state in which the first end portion has been inserted into the second groove.

According to the above-mentioned configuration, the cleaning body is disposed (extends) as far as (up to) the first end portion of the cap-body part.

In one or more embodiments, the cap member may comprise a protruding part, which protrudes (preferably, axially protrudes) from the second end surface of the cap-body part. The protruding part may be inserted into an opening, which is provided in a first end surface of the base member.

According to the above-mentioned configuration, assembly work efficiency when the cap member is mounted on the first end portion of the base member can be increased. In addition, the fixing of the cap member and the base member to each other is stabilized.

In one or more embodiments, in the state in which the protruding part has been inserted into the opening, the first end surface of the base member and the second end surface of the cap-body part may oppose each other, and the second groove may connect with (axially abut, be continuous with) the first groove.

According to the above-mentioned configuration, in the state in which the cap member and the base member are stably fixed to each other, the first groove and the second groove are connected to (continuous with) each other; i.e. there is no gap between the first groove and the second groove.

In one or more embodiments, the cap member may comprise a projection part (radially projecting part), which opposes at least a portion of an outer surface of the base member in the state in which the protruding part has been inserted into the opening.

According to the above-mentioned configuration, when the cap member is mounted on (at) the first end portion of the base member, the cap member can be positioned in the circumferential direction on (relative to) the base member using the projection part.

In one or more embodiments, the projection part may be disposed (extend) more radially outward than the protruding part and may protrude (preferably, axially) from the cap-body part toward (over) the base member.

According to the above-mentioned configuration, the cap member can be easily positioned on (relative to) the base member.

In one or more embodiments, the base member may comprise a base-body part, which has the opening, and a rib part (or rib parts), which protrude(s) radially outward from an outer surface of the base-body part. At least two of the rib parts may be provided spaced apart in a circumferential direction, preferably in an equidistant manner. The projection part may be disposed (extend, preferably axially extend) between two rib parts that are adjacent to each other in the circumferential direction.

According to the above-mentioned configuration, the cap member is positioned on the base member in the rotational (circumferential) direction.

In one or more embodiments, within a plane orthogonal to the rotational axis, the shape of an inner surface of the recessed portion may be hexagonal, and the shape of an outer surface of the rotary member also may be hexagonal. In other words, the recessed portion and the rotary member preferably have complementary (matching) polygonal shapes so that rotation is efficiently and effectively transmittable from the rotary member to the rotary brush.

According to the above-mentioned configuration, relative rotation between the rotary brush and the rotary member is restrained (prevented). Thus, the rotary brush will rotate together with the rotary member.

Embodiment according to the present disclosure are explained below, with reference to the drawings, but the present disclosure is not limited to the disclosed embodiments. The structural elements of the embodiments explained below can be combined where appropriate. In addition, embodiments may be derived from the present teachings in which some of the structural elements are not used.

In the embodiments, positional relationships among parts will be explained using the terms “front,” “rear,” “up,” “down,” “left,” and “right.” Each of these terms indicates a relative position or a direction, using the center of a nozzle 1 as a reference.

Nozzle

FIG. 1 is an oblique view, viewed from the upper-left front, that shows the nozzle 1 according to a first representative, non-limiting embodiment of the present disclosure. FIG. 2 is a drawing, viewed from the left, of the nozzle 1 according to the embodiment. FIG. 3 is an oblique view, viewed from the lower-left rear, that shows the nozzle 1 according to the embodiment. FIG. 4 is an exploded, oblique view, viewed from the lower-left rear, that shows the nozzle 1 according to the embodiment. FIG. 5 is a drawing, viewed from below, of the nozzle 1 according to the embodiment.

The nozzle 1 comprises a main body 2, a joint 3, a coupling pipe 4, a bumper 5, rollers 9, a wiper 10, a motor 11, and a rotary brush 20.

The main body 2 has a suction port 6. A lower surface of the main body 2 is designed (configured) to oppose a surface to be cleaned. The suction port 6 is provided (defined) in the lower surface of the main body 2. The suction port 6 faces downward when the lower surface of the nozzle 6 is placed on a floor or other horizontal surface. The main body 2 is elongate in the left-right direction. In the left-right direction, the suction port 6 is preferably provided at a center portion of the main body 2, although the suction port 6 may be offset from the center in some embodiments of the present teachings. In the front-rear direction, the suction port 6 is provided at a front portion of the main body 2. Dust, debris, etc. present on the surface to be cleaned is suctioned into the suction port 6.

The main body 2 comprises a lower case 2A and an upper case 2B. The lower case 2A has the suction port 6. The lower surface of the main body 2 includes the lower surface of the lower case 2A. The upper case 2B is disposed more upward than the lower case 2A when the lower surface of the nozzle 6 is placed on a floor or other horizontal surface. An upper surface of the lower case 2A and the lower surface of the upper case 2B oppose each other. The lower case 2A and the upper case 2B are fixed to each other, e.g., by eight screws 8.

The lower case 2A supports the rollers 9 and the wiper 10 on the surface to be cleaned in a contactable manner. The rollers 9 roll on the surface to be cleaned. A plurality of the rollers 9 are provided. In the embodiment, the rollers 9 include front rollers 9A, which are disposed more forward than the suction port 6, and rear rollers 9B, which are disposed more rearward than the suction port 6. Two of the front rollers 9A are disposed in the left-right direction. Two of the rear rollers 9B are disposed in the left-right direction. The wiper 10 is disposed more rearward than the suction port 6 and protrudes downward from the lower surface of the main body 2 when the lower surface of the nozzle 6 is placed on a floor or other horizontal surface. An upper-end portion of the wiper 10 is fixed to the lower case 2A. A lower-end portion of the wiper 10 is designed (configured) to make contact with the surface to be cleaned. The wiper 10 collects (sweeps) dust on the surface to be cleaned that was not completely suctioned by the suction port 6. Thus, the suction port 6 can suction the dust collected (swept) by the wiper 10.

The joint 3 has a pipe shape. The joint 3 is coupled to a rear portion of the main body 2. The joint 3 is disposed such that it protrudes rearward from a rear portion of the main body 2. The joint 3 is coupled to the main body 2 in a pivotable manner. A pivot axis of the joint 3 extends in the left-right direction. The coupling pipe 4 is connected to the joint 3. The joint 3 is fixed to the coupling pipe 4, e.g., by two screws 8. The main body 2 is coupled to the coupling pipe 4 via the joint 3 in a pivotable manner.

The bumper 5 is designed (configured) to cushion impacts received by the main body 2 from objects around the main body 2. In other words, the bumper 5 obstructs (blocks) direct contact between the main body 2 and objects around the main body 2, and is preferably composed of an elastic material (e.g,, an elastomer) in order to absorb impacts, thereby reducing the effect of the impact on the main body 2. The bumper 5 is disposed such that it surrounds at least a portion of the main body 2. For example, a portion of the bumper 5 is disposed on (along) a front portion of the main body 2. In addition, another portion of the bumper 5 is disposed on (along) a left portion of the main body 2 and a further portion of the bumper 5 is disposed on (along) a right portion of the main body 2. Portions of the bumper 5 are also disposed on (along) a rear portion of the main body 2.

The rotary brush 20 is supported on the main body 2 in a rotatable manner. The rotary brush 20 rotates about the rotational axis, which extends in the left-right direction. The motor 11 generates a rotational force for rotating the rotary brush 20. The motor 11 is housed in the upper case 2B.

FIG. 6 is a drawing, viewed from below, of the nozzle 1 according to the embodiment, in the state in which the lower case 2A has been removed. FIG. 7 is a drawing, viewed from below, of the nozzle 1 according to the embodiment, in the state in which both the lower case 2A and the rotary brush 20 have been removed. FIG. 8 is an oblique view, viewed from the lower-right front, that shows the nozzle 1 according to the embodiment, in the state in which both the lower case 2A and the rotary brush 20 have been removed.

As shown in FIGS. 2, 4, 6, 7, and 8, the nozzle 1 comprises a power-transmission mechanism 12, which transmits, to the rotary brush 20, the rotational force generated by the motor 11. For example, the power-transmission mechanism 12 preferably comprises: a motor pulley 13, which is fixed to an output shaft of the motor 11; a drive pulley 14, which is disposed more forward than the motor pulley 13; a belt 15, which is looped around the motor pulley 13 and the drive pulley 14; and a drive shaft (rotary member) 16, which rotates together with the drive pulley 14.

The drive shaft 16 is supported on bearings 17 in a rotatable manner. The bearings 17 are held by the main body 2. The bearings 17 include a first bearing 17A, which is disposed more leftward than the drive pulley 14, and a second bearing 17B, which is disposed more rightward than the drive pulley 14. In other words, the drive pulley 14 is preferably sandwiched or interleaved between the first and second bearings 17A, 17B.

When the motor 11 is driven and causes the motor pulley 13 to rotate, the drive pulley 14, which is coupled to the motor pulley 13 via the belt 15, rotates synchronously with the motor pulley 13. The drive shaft 16 is coupled to a left portion of the rotary brush 20. The drive pulley 14 and the drive shaft 16 are fixed to each other and rotate together. Thus, when the drive pulley 14 rotates and thereby the drive shaft 16 rotates, the rotary brush 20, which is coupled to the drive shaft 16, also rotates. The drive shaft 16 functions as a rotary member that imparts (transmits) to the rotary brush 20 the rotational force generated by the motor 11.

A support shaft 18 (refer to FIG. 10) is provided at (extends axially from) a right (right end) portion of the rotary brush 20. The support shaft 18 is held by the main body 2. The right portion of the rotary brush 20 is supported on (in) the main body 2 via the support shaft 18 in a rotatable manner.

The lower case 2A comprises a rear-plate part 2C, which is disposed rearward of the rotary brush 20. The upper case 2B comprises guide-plate parts 2D, which are disposed on a left-end portion and a right-end portion, respectively, of the rear-plate part 2C. Each of the guide-plate parts 2D has a guide surface 2E. The guide surface 2E of each of the guide-plate parts 2D is tilted upward toward the center of the main body 2 in the left-right direction. The guide surface 2E of the guide-plate part 2D on the left side is tilted upward as it goes (extends) rightward. The guide surface 2E of the guide-plate part 2D on the right side is tilted upward as it goes (extends) leftward.

The rotary brush 20 rotates while at least portions of the rotary brush 20 are caused to make contact with the guide-plate parts 2D. There is a possibility that string-like foreign matter, such as hair and threads, are present on the surface to be cleaned. During cleaning of the surface, such string-like foreign matter on the surface may adhere to the rotary brush 20 and then be transferred into the interior of the main body 2 as the rotary brush 20 rotates. The string-like foreign matter transferred into the interior of the main body 2 makes contact with the guide-plate parts 2D. The guide-plate parts 2D scrape off the string-like foreign matter adhered to the rotary brush 20. The guide surfaces 2E guide the string-like foreign matter scraped off by the guide-plate parts 2D, preferably toward the center of the main body 2 in the left-right direction. The center of an internal passageway of the main body 2 passes through an internal passageway of the joint 3. The string-like foreign matter guided to the center of the main body 2 is suctioned into the coupling pipe 4 via the joint 3. Thus, entanglement of the string-like foreign matter around the rotary brush 20 is curtailed by the guide-plate parts 2D.

Rotary Brush

FIG. 9 is an oblique view, viewed from the upper-left front, that shows the rotary brush 20 according to the embodiment. FIG. 10 is an oblique view, viewed from the upper-right rear, that shows the rotary brush 20 according to the embodiment. FIG. 11 is a drawing, viewed from above, of the rotary brush 20 according to the embodiment. FIG. 12 is a drawing, viewed from the left, of the rotary brush 20 according to the embodiment. FIG. 13 is an oblique view, viewed from the upper-left front, that shows a left portion of the rotary brush 20 according to the embodiment.

The rotary brush 20 rotates about the rotational axis, which extends in the left-right direction. In the explanation above and below, the direction parallel to the rotational axis may be called the “axial direction” as appropriate, the radiating direction of the rotational axis may be called the “radial direction” as appropriate, and the direction that goes around the rotational axis may be called the “circumferential direction” or the “rotational direction” as appropriate. In addition, in the radial direction, a location that is proximate to or a direction that approaches the rotational axis is called “radially inward” as appropriate, and a location that is distant from or a direction that leads away from the rotational axis is called “radially outward” as appropriate.

The rotary brush 20 comprises: a base member 21; a first cap member 22, which is fixed to a left-end portion of the base member 21; a second cap member 23, which is fixed to a cap part 23B of the base member 21; cleaning bodies 24, such as blades, brushes, and the like, which are mounted on the base member 21 and the first cap member 22; and a sealing member 25.

FIG. 14 is an oblique view, viewed from the upper-left front, that shows a left portion of the rotary brush 20 according to the embodiment, in the state in which the cleaning bodies 24 have been removed. FIG. 15 is an exploded, oblique view, viewed from the upper-left front, that shows the left portion of the base member 21 and the first cap member 22 according to the embodiment. FIG. 16 is an exploded, oblique view, viewed from the upper-right rear, that shows the left portion of the base member 21 and the first cap member 22 according to the embodiment. FIG. 17 is a cross-sectional view that shows the left portion of the base member 21 and the first cap member 22 according to the embodiment.

The base member 21 rotates about the rotational axis, which extends in the left-right direction. The base member 21 is elongate in the left-right direction (axial direction). The central axis of the base member 21 and the rotational axis coincide with each other. The base member 21 is preferably made of metal. In the embodiment, the base member 21 is preferably made of aluminum or an aluminum alloy. The base member 21 is preferably manufactured according to an extrusion-molding method.

The base member 21 comprises: a base-body part 21A, which has a tube shape; rib parts 21B, which protrude radially outward from the outer surface of the base-body part 21A; recessed portions 21C, which are respectively provided between circumferentially-adjacent ones of the rib parts 21B; an opening 21D, which is provided in a left-end surface of the base-body part 21A; and first grooves 21E, into which the cleaning bodies 24 are respectively inserted.

The base-body part 21A has a tube shape. The base-body part 21A is elongate in the left-right direction (axial direction). A hole (central through hole) in the base-body part 21A extends in the left-right direction. The central axis of the base-body part 21A and the rotational axis coincide with each other. The rotational axis extends in the left-right direction such that it passes through the center of the hole of the base-body part 21A. The opening 21D is provided in the base-body part 21A. The opening 21D includes a left-end portion of the hole of the base-body part 21A.

As was noted above, the rib parts 21B protrude radially outward from the outer surface of the base-body part 21A. At least two of the rib parts 21B are provided spaced apart in the circumferential direction of the base-body part 21A, preferably in an equidistant manner. In the embodiment, four of the rib parts 21B are provided spaced apart (equidistantly) in the circumferential direction of the base-body part 21A, although in other embodiments, three rib parts 21B may be provided or four or more rib parts 21B may be provided. The rib parts 21B are elongate in the left-right direction (axial direction). The left-end portions of the rib parts 21B and the left-end portion of the base-body part 21A coincide with each other. The right-end portions of the rib parts 21B and the right-end portion of the base-body part 21A coincide with each other. The rib parts 21B are bent such that, when the rotary brush 20 rotates during cleaning of the surface to be cleaned, both end portions of the rib parts 21B in the left-right direction oppose the surface to be cleaned ahead of the central portion. During extrusion molding of the base member 21, the raw material of the base member 21 is twisted (bent, curved0 so as to bend the rib parts 21B as shown, e.g., in FIG. 15.

The recessed portions 21C are respectively provided between pairs of adjacent ones of the rib parts 21B in the circumferential direction. In the embodiment, four of the recessed portions 21C are provided spaced apart in (around) the circumferential direction of the base-body part 21A, preferably equidistantly.

The cleaning bodies 24 are respectively inserted into the first grooves 21E. The first grooves 21E are elongate in the left-right direction (axial direction). At least two of the first grooves 21E are provided spaced apart, preferably equidistantly, in (around) the circumferential direction of the base-body part 21A. In the embodiment, four of the first grooves 21E are provided spaced apart in the circumferential direction of the base-body part 21A. Naturally, the number of first grooves 21E is preferably equal to the number of cleaning bodies 24. In the embodiment, the first grooves 21E are formed (defined) in (inside, within) the rib parts 21B. In other words, one first groove 21E is formed (defined) in one (each) rib part 21B. The first grooves 21E are formed (extend) along the respective rib parts 21B. Each of the first grooves 21E is formed such that at least a portion thereof is bent or curved along the axial direction, as can be seen by viewing, e.g., FIGS. 10-11 with FIGS. 13-15. The first grooves 21E are formed (extend) as far as (up to) the left-end portion (left end) of the base member 21. The first grooves 21E also are formed (extend) as far as (up to) the right-end portion (right end) of the base member 21. The left-end portions of the first grooves 21E and the left-end portion of the base-body part 21A coincide with each other. The right-end portions of the first grooves 21E and the right-end portion of the base-body part 21A coincide with each other.

The second cap member 23 is fixed to a right-end portion of the base member 21 by a bonding agent, such as an adhesive, although mechanical fasteners also may be used. The second cap member 23 is made of a synthetic resin (polymer). As can be seen, e.g., in FIG. 10, the second cap member 23 comprises a holder part 23A, which holds the support shaft 18, and a cap part 23B, which is disposed around the holder part 23A. The holder part 23A has a recessed portion (hole, such as a blind hole or through hole) 23C, into which the support shaft 18 is inserted, and a pair of protruding parts 23D, which protrude in the axial direction such that they are disposed around the support shaft 18 in the radial direction.

The sealing member 25 is disposed around (encircles) a left-end portion of the cap part 23B. The sealing member 25 is or comprises a napped fabric, such as, e.g., fleece, felt or velvet. As the rotary brush 20 rotates, the sealing member 25 makes contact with the edge of the lower case 2A that defines a right-end portion of the suction port 6, as can be seen, e.g., in FIG. 5. As described above, there is a possibility that string-like foreign matter, such as hair or threads, are present on the surface to be cleaned. During cleaning of the surface, the sealing member 25 curtails (obstructs, hinders) the transfer (lateral movement) to the support shaft 18 side (the second cap member 23 side) of string-like foreign matter that has adhered to the rotary brush 20. Therefore, entanglement of the string-like foreign matter on the support shaft 18 or the second cap member 23 can be curtailed by the sealing member 25.

The first cap member 22 is fixed to the left-end portion of the base member 21 by a bonding agent, such as an adhesive, although mechanical fasteners also may be used. The first cap member 22 is also preferably made of a synthetic resin (polymer). As can be seen, e.g., in FIGS. 9 and 12-17, the first cap member 22 comprises: a cap-body part 22A; a flange part 22B, which is disposed on a left-end portion of the cap-body part 22A; rib parts 22G, which protrude radially outward from the outer surface of the cap-body part 22A; a recessed portion (hole, e.g., a through hole or blind hole) 22C, which is provided (defined) such that it is recessed (extends) rightward from a left-end surface of the cap-body part 22A; a protruding part 22D, which protrudes rightward (axially) from a right-end surface of the cap-body part 22A; second grooves 22E, into which the cleaning bodies 24 are respectively inserted; and a projection part 22F, which protrudes rightward (radially) from the cap-body part 22A.

The cap-body part 22A has a columnar shape. The central axis of the cap-body part 22A and the rotational axis coincide with each other. The flange part 22B is provided such that it protrudes radially outward from a left-end portion of the cap-body part 22A.

The rib parts 22G protrude radially outward from the outer surface of the cap-body part 22A. At least two of the rib parts 22G are provided spaced apart, preferably equidistantly, in the circumferential direction of the cap-body part 22A. In the embodiment, four of the rib parts 22G are provided spaced apart in the circumferential direction of the cap-body part 22A, although more or less rib parts 22G may be provided in other embodiments of the present teachings, as was discussed above. The rib parts 22G are elongate in the left-right direction (axial direction). Left-end portions of the rib parts 22G and a left-end portion of the cap-body part 22A coincide with each other. Right-end portions of the rib parts 22G and a right-end portion of the cap-body part 22A coincide with each other. The rib parts 22G are formed in a straight shape extending in the axial direction.

The drive shaft 16 is inserted into the recessed portion 22C. The recessed portion 22C is provided (defined) such that it is recessed (extends) from a left-end surface of the first cap member 22 toward a right-end portion of the first cap member 22. The central axis of the recessed portion 22C and the rotational axis coincide with each other. Within a plane orthogonal to the rotational axis, the shape of the inner surface of the recessed portion 22C is hexagonal. Within a plane orthogonal to the rotational axis, the shape of the outer surface of the drive shaft 16 is hexagonal. Thus, in the state in which the drive shaft 16 has been inserted into the recessed portion 22C, relative rotation between the rotary brush 20 and the drive shaft 16 is restrained (prevented), such that the rotary brush 20 will rotate together with the drive shaft 16.

The protruding part 22D protrudes rightward from a right-end surface of the cap-body part 22A in the axial direction. The central axis of the cap-body part 22A, the central axis of the protruding part 22D, and the rotational axis coincide with each other. The outer diameter of the protruding part 22D is smaller than the outer diameter of the cap-body part 22A. The protruding part 22D is inserted into the opening 21D, which is provided in a left-end surface of the base member 21. In the state in which the protruding part 22D has been inserted into the opening 21D, the left-end surface of the base member 21 and the right-end surface of the cap-body part 22A oppose each other.

The cleaning bodies 24 are respectively inserted into the second grooves 22E. The second grooves 22E are elongate in the left-right direction (axial direction). At least two of the second grooves 22E are provided spaced apart, preferably equidistantly, in the circumferential direction of the cap-body part 22A. In the embodiment, four of the second grooves 22E are provided spaced apart in the circumferential direction of the cap-body part 22A, although more or less second grooves 22E may be provided in other embodiments of the present teachings, as was discussed above. In the embodiment, the second grooves 22E are respectively formed in (inside, within) the rib parts 22G. In other words, one second groove 22E is formed in one (each) rib part 22G. The second grooves 22E are formed (extend) along the rib parts 22G. The second grooves 22E are formed in a straight shape such that they extend straight in the axial direction. The width of the second grooves 22E is preferably wider than the width of the first grooves 21E. The second grooves 22E are formed (extend) as far as (up to) the left-end portion (left end) of the cap-body part 22A (the rib parts 22G). The second grooves 22E are formed (extend) as far as (up to) the right-end portion (right end) of the cap-body part 22A (the rib parts 22G). Left-end portions of the second grooves 22E and the left-end portion of the cap-body part 22A coincide with each other. Right-end portions of the second grooves 22E and the right-end portion of the cap-body part 22A coincide with each other. In the left-right direction (axial direction), the recessed portion 22C and at least portions of the second grooves 22E overlap each other. In other words, lines extending radially from the rotational axis of the first cap member 22 will intersect both the recessed portion and the second grooves 22E.

The second grooves 22E are formed (configured, designed) such that they connect with (abut, are continuous with) the respective first grooves 21E. That is, in the state in which the protruding part 22D has been inserted into the opening 21D, the second grooves 22E connect with (abut, are continuous with) the respective first grooves 21E. In the circumferential direction, the locations of the right-end portions of the second grooves 22E and the locations of the left-end portions of the first grooves 21E respectively coincide with each other. In other words, one second groove 22E and one first groove 21E connect with each other. The four second grooves 22E respectively connect with the corresponding first grooves 21E.

One of the cleaning bodies 24 is inserted so as to extend across one of the first grooves 21E and one of the second grooves 22E. Thus, in the state in which the cleaning bodies 24 have been inserted into the respective second grooves 22E, the left-end portions (left ends) of the cleaning bodies 24 make contact with the flange part 22B. That is, the cleaning bodies 24 are disposed (extend) as far as (up to) the left-end portions (left ends) of the second grooves 22E.

The projection part 22F protrudes radially from the cap-body part 22A toward the base member 21. In other words, the projection part 22F is disposed more radially outward than the protruding part 22D. In the state in which the protruding part 22D has been inserted into the opening 21D, the projection part 22F opposes at least a portion of the outer surface of the base member 21. In the state in which the protruding part 22D has been inserted into the opening 21D, the projection part 22F opposes at least a portion of the outer surface of the base-body part 21A. In the embodiment, the projection part 22F is disposed between two circumferentially-adjacent rib parts 21B. That is, the projection part 22F is disposed in one of the recessed portions 21C of the base member 21, as can be seen in FIGS. 14 and 15. In the embodiment, there is only one projection part 22F. However, it is noted that, in other embodiments of the present teachings, the first cap member 22 may comprise a first projection part 22F, which is disposed in a first one of the recessed portions 21C, and a second projection part 22F, which is disposed in a second one of the recessed portions 21C.

The projection part 22F functions as a positioning member in the rotational (circumferential) direction when the first cap member 22 is mounted on the base member 21. Furthermore, when the first cap member 22 is mounted on the base member 21 such that the projection part 22F is disposed in one of the recessed portions 21C, the first grooves 21E and the second grooves 22E respectively connect with (abut, are continuous with) each other.

When the motor 11 is driven, the drive shaft 16 rotates. The drive shaft 16 is inserted into the recessed portion 22C. As described above, relative rotation between the rotary brush 20 and the drive shaft 16 is restrained (prevented). Thus, when the motor 11 is being driven thereby causing the drive shaft 16 to rotate, the rotary brush 20 rotates together with the drive shaft 16.

Because the first cap member 22 has the second grooves 22E, the cleaning bodies 24 are provided (extend) as far as (up to) the left-end portion (left end) of the rotary brush 20. Because the cleaning bodies 24 are present as far as the left-end portion (left end) of the rotary brush 20, the cleaning performance of the nozzle 1 can be improved.

Cleaner

FIG. 18 is an oblique view that shows a cleaner (vacuum cleaner, also known as a stick vacuum cleaner) 50, which comprises the nozzle 1 according to the above-described embodiment. As shown in FIG. 18, the cleaner 50 comprises: the nozzle 1; a cleaner main body 51; and a pipe 52, which physically and fluidly couples the nozzle 1 and the cleaner main body 51 to each other. The cleaner main body 51 comprises a handle 53, which is configured to be gripped by the user of the cleaner 50 during a cleaning operation. In the present embodiment, the cleaner 50 is a handheld vacuum cleaner that is configured for performing cleaning work while the handle 53 is gripped by the user.

The nozzle 1 is connected, physically and fluidly, to the cleaner main body 51 via the coupling pipe 4. The coupling pipe 4 of the nozzle 1 is connected to a first end portion of the pipe 52. The second end portion of the pipe 52 is connected to the cleaner main body 51.

FIG. 19 is a cross-sectional view that shows the cleaner main body 51 according to the embodiment. As shown in FIGS. 18 and 19, the cleaner main body 51 comprises: a housing 54; a motor 55, which is disposed in the interior of the housing 54; a fan 56, which is disposed in the interior of the housing 54; and a battery 57. The housing 54 comprises the handle 53.

A suction port 58 is provided at a front-end portion of the housing 54. Air-exhaust ports 59 are provided in side portions (side walls) of the housing 54. The second end portion of the pipe 52 is inserted into the suction port 58.

The motor 55 is an inner-rotor-type brushless motor. The motor 55 generates motive power that rotates the fan 56. The motor 55 is driven by electric power supplied from the battery 57.

The fan 56 is disposed more forward than the motor 55. The fan 56 is fixed to a rotor shaft of the motor 55. The fan 56 is rotated by the motor 55. The fan 56 generates a suction force in (at) the suction port 6 of the nozzle 1. When the fan 56 rotates, the suction force is generated in the suction port 58 of the housing 54. Owing to the generation of the suction force in the suction port 58 of the housing 54, a suction force is generated in the suction port 6 of the nozzle 1.

Owing to the generation of the suction force in the suction port 6 of the nozzle 1, dust, debris, etc. on the surface to be cleaned, together with air, is suctioned into the suction port 6. The air flows through the internal passageway of the main body 2 and the internal passageway of the joint 3 and, after having flowed through the internal passageway of the coupling pipe 4 and the internal passageway of the pipe 52, flows into the interior space of the housing 54 via the suction port 58.

A filter 60 is disposed between the suction port 58 and the fan 56. The filter 60 collects (catches, filters) dust, debris, etc. contained in the air. After the air that has passed through the filter 60 has flowed into the fan 56, it is exhausted from the air-exhaust ports 59.

Effects and Advantages of the Present Embodiments

As explained above, the rotary brush 20 comprises: the base member 21 having the first grooves 21E, into which the cleaning bodies 24 are respectively inserted, that the base member being rotatable about the rotational axis; and the first cap member 22 fixed to the left-end portion (first end portion) of the base member 21 in the axial direction and having the second grooves 22E, into which the cleaning bodies 24 are respectively inserted. The first cap member 22 has the recessed portion 22C, into which the drive shaft 16, which is the rotary member, is insertable.

According to the above-mentioned configuration, because the second grooves 22E are provided in the first cap member 22, which is fixed to the left-end portion of the base member 21, the cleaning bodies 24 can be provided not only on (along) the base member 21 but also on (along) the first cap member 22. Because the cleaning bodies 24 are also present on (extend across) the left-end portion of the rotary brush 20, cleaning performance can be improved owing to the increased axial length of the cleaning bodies 24 without increasing the axial length of the rotary brush 20. In addition, the recessed portion 22C is provided in the first cap member 22. Thus, when the drive shaft 16, which is inserted into the recessed portion 22C, rotates, the rotary brush 20 will also rotate.

In the embodiment, the recessed portion 22C is provided (defined) such that it is recessed (axially extends) from the left-end surface (first end surface) of the first cap member 22 to the right-end portion (second end portion or second end) of the first cap member 22.

According to the above-mentioned configuration, the drive shaft 16 is inserted into the recessed portion 22C, which is provided in the left-end surface of the first cap member 22.

In the embodiment, in the axial direction, the recessed portion 22C and at least portions of the second grooves 22E overlap each other.

According to the above-mentioned configuration, enlargement of the rotary brush 20 in the axial direction is curtailed.

In the embodiment, the first grooves 21E are formed (extend) as far as (up to) the left-end portion (first end portion or first end) of the base member 21. The second grooves 22E are formed such that they respectively connect with (abut, are continuous with) the first grooves 21E.

According to the above-mentioned configuration, one continuous (integral) cleaning body 24 can be inserted into both one of the first grooves 21E, and a corresponding one of the second grooves 22E.

Thus, in the embodiment, one of the cleaning bodies 24 is inserted (extends) across one of the first grooves 21E and one of the second grooves 22E. In other words, each of the cleaning bodies 24 extends across respective pairs of first grooves 21E in the base member 21 and second grooves 22E in the first cap member 22.

Therefore, according to the above-mentioned configuration, an increase in the number of the cleaning bodies 24 (the part count) can be avoided, because separate cleaning bodies are not required for each of the second grooves 22E in the first cap member 22.

In the embodiment, the first grooves 21E are formed (extend) such that at least a portion of each is bent or curved along the axial direction. The second grooves 22E are formed in a straight shape along the axial direction.

Therefore, according to the above-mentioned configuration, each of the cleaning bodies 24 is disposed (axially extends) in a straight shape at (along) the left-end portion (first end portion) of the rotary brush 20.

In the embodiment, the second grooves 22E are formed such that they each extend in the axial direction.

According to the above-mentioned configuration, the cleaning bodies 24 are disposed such that they each extend in the axial direction at (along) the left-end portion (first end portion) of the rotary brush 20.

In the embodiment, the width of the second grooves 22E is larger than the width of the first grooves 21E.

According to the above-mentioned configuration, assembly work efficiency when the cleaning bodies 24 are inserted into the respective second grooves 22E can be increased, because it becomes easier to insert the cleaning bodies 24 into the respective second grooves 22E.

In the embodiment, the first cap member 22 comprises the cap-body part 22A, in which the second grooves 22E are provided (defined); and the flange part 22B, which is disposed at a first end portion of the cap-body part 22A. The left-end portions (first end portions) of the cleaning bodies 24 make contact with the flange part 22B in the state in which the first end portions have been inserted into the second grooves 22E.

According to the above-mentioned configuration, the cleaning bodies 24 are disposed (extend) as far as (up to) the left-end portion (first end portion or first end) of the cap-body part 22A.

In the embodiment, the first cap member 22 comprises the protruding part 22D, which axially protrudes from the right-end surface (second end surface) of the cap-body part 22A. The protruding part 22D is inserted into the opening 21D, which is provided (defined) in the left-end surface (first end surface) of the base member 21.

According to the above-mentioned configuration, assembly work efficiency when the first cap member 22 is mounted on the left-end portion (first end portion) of the base member 21 can be improved. In addition, the fixing of the first cap member 22 and the base member 21 to each other is stabilized.

In the embodiment, in the state in which the protruding part 22D has been inserted into the opening 21D, the left-end surface (first end surface) of the base member 21 and the right-end surface (second end surface) of the cap-body part 22A oppose each other, and the second grooves 22E respective connect with (abut, are continuous with) the first grooves 21E.

According to the above-mentioned configuration, in the state in which the first cap member 22 and the base member 21 are stably fixed to each other, the first grooves 21E and the second grooves 22E are respectively connected to (abut, are continuous with) each other.

In the embodiment, the first cap member 22 comprises the projection part 22F, which opposes at least a portion of the outer surface of the base member 21 in the state in which the protruding part 22D has been inserted into the opening 21D.

According to the above-mentioned configuration, when the first cap member 22 is mounted on the first end portion of the base member 21, the first cap member 22 can be positioned on the base member 21 in the circumferential (rotational direction) using the projection part 22F that protrudes radially from the protruding part 22D.

In the embodiment, the projection part 22F is disposed more radially outward than the protruding part 22D and protrudes from the cap-body part 22A toward the base member 21.

According to the above-mentioned configuration, the first cap member 22 is easily positioned on the base member 21.

In the embodiment, the base member 21 comprises the base-body part 21A, which has the opening 21D, and the rib parts 21B, which protrude radially outward from the outer surface of the base-body part 21A. A plurality of the rib parts 21B is provided spaced apart in the circumferential direction. The projection part 22F is disposed between a pair of the rib parts 21B that are adjacent to each other.

According to the above-mentioned configuration, the first cap member 22 is positioned on the base member 21 in the rotational direction.

In the embodiment, within a plane orthogonal to the rotational axis, the shape of the inner surface of the recessed portion 22C is hexagonal, and the shape of the outer surface of the drive shaft 16 is hexagonal.

According to the above-mentioned configuration, relative rotation between the rotary brush 20 and the drive shaft 16 is restrained (prevented). Thus, the rotary brush 20 can rotate together with the drive shaft 16.

Other Embodiments

In another embodiment, a robot dust collector (robotic vacuum cleaner) and/or an upright vacuum cleaner and/or a canister vacuum cleaner may comprise the rotary brush 20 that was described above.

Representative, non-limiting examples of the present invention were described above in detail with reference to the attached drawings. This detailed description is merely intended to teach a person of skill in the art further details for practicing preferred aspects of the present teachings and is not intended to limit the scope of the invention. Furthermore, each of the additional features and teachings disclosed above may be utilized separately or in conjunction with other features and teachings to provide improved rotary brushes, nozzles and cleaners, such as vacuum cleaners.

Moreover, combinations of features and steps disclosed in the above detailed description may not be necessary to practice the invention in the broadest sense, and are instead taught merely to particularly describe representative examples of the invention. Furthermore, various features of the above-described representative examples, as well as the various independent and dependent claims below, may be combined in ways that are not specifically and explicitly enumerated in order to provide additional useful embodiments of the present teachings.

All features disclosed in the description and/or the claims are intended to be disclosed separately and independently from each other for the purpose of original written disclosure, as well as for the purpose of restricting the claimed subject matter, independent of the compositions of the features in the embodiments and/or the claims. In addition, all value ranges or indications of groups of entities are intended to disclose every possible intermediate value or intermediate entity for the purpose of original written disclosure, as well as for the purpose of restricting the claimed subject matter.

EXPLANATION OF THE REFERENCE NUMBERS

1 Nozzle

2 Main body2A Lower case2B Upper case2C Rear-plate part2D Guide-plate part2E Guide surface

3 Joint

4 Coupling pipe

5 Bumper

6 Suction port

8 Screw

9 Roller

9A Front roller9B Rear roller

10 Wiper

11 Motor

12 Power-transmission mechanism13 Motor pulley14 Drive pulley

15 Belt

16 Drive shaft (rotary member)

17 Bearing

17A Bearing

17B Bearing

18 Support shaft20 Rotary brush21 Base member21A Base-body part21B Rib part21C Recessed portion

21D Opening

21E First groove22 First cap member22A Cap-body part22B Flange part22C Recessed portion22D Protruding part22E Second groove22F Projection part22G Rib part23 Second cap member23A Holder part23B Cap part23C Recessed portion23D Protruding part24 Cleaning body25 Sealing member50 Cleaner (vacuum cleaner, stick vacuum cleaner)51 Cleaner main body

52 Pipe

53 Handle

54 Housing

55 Motor

56 Fan

57 Battery

58 Suction port59 Air-exhaust port

60 Filter

Claims

1. A rotary brush comprising: a base member having a first groove, into which a cleaning body is inserted, the base member being rotatable about a rotational axis; anda first cap member fixed to a first end portion of the base member in the axial direction and having a second groove, into which the cleaning body is also inserted;wherein the cap member has a recessed portion, into which a rotary member is insertable.

2. The rotary brush according to claim 1, wherein the recessed portion extends from a first end surface of the first cap member to a second end portion of the first cap member.

3. The rotary brush according to claim 2, wherein the recessed portion and at least a portion of the second groove overlap each other in the axial direction.

4. The rotary brush according to claim 1, wherein: the first groove extends up to the first end portion of the base member; andthe second groove is continuous with the first groove.

5. The rotary brush according to claim 4, wherein the cleaning body extends across the first groove and the second groove.

6. The rotary brush according to claim 5, wherein: the first groove includes a portion that is bent in the axial direction; andthe second groove has a straight shape.

7. The rotary brush according to claim 6, wherein the second groove extends in the axial direction.

8. The rotary brush according to claim 5, wherein the width of the second groove is larger than the width of the first groove.

9. The rotary brush according to claim 1, wherein: the first cap member comprises a cap-body part, in which the second groove is defined; and a flange part, which is disposed at a first end portion of the cap-body part; anda first end portion of the cleaning body makes contact with the flange part in the state in which the first end portion has been inserted into the second groove.

10. The rotary brush according to claim 9, wherein: the first cap member comprises a protruding part, which protrudes from a second end surface of the cap-body part in the axial direction; andthe protruding part is inserted into an opening, which is defined in a first end surface of the base member.

11. The rotary brush according to claim 10, wherein, in the state in which the protruding part has been inserted into the opening, the first end surface of the base member and the second end surface of the cap-body part oppose each other, and the second groove is continuous with the first groove.

12. The rotary brush according to claim 11, wherein the first cap member comprises a projection part, which opposes at least a portion of an outer surface of the base member in the state in which the protruding part has been inserted into the opening.

13. The rotary brush according to claim 12, wherein the projection part extends more radially outward than the protruding part and protrudes from the cap-body part toward the base member.

14. The rotary brush according to claim 13, wherein: the base member comprises a base-body part, which has the opening, and a plurality of rib parts, which protrude radially outward from an outer surface of the base-body part;the rib parts are spaced apart in a circumferential direction; andthe projection part is disposed between two of the rib parts that are adjacent to each other in the circumferential direction.

15. The rotary brush according to claim 1, wherein, within a plane orthogonal to the rotational axis, the shape of an inner surface of the recessed portion is hexagonal, and the shape of an outer surface of the rotary member is hexagonal.

16. The rotary brush according to claim 3, wherein: the first groove extends up to the first end portion of the base member;the second groove is continuous with the first groove;the cleaning body extends across the first groove and the second groove;the first groove includes a portion that is curved in the axial direction;the second groove has a straight shape extending in the axial direction; andthe width of the second groove is larger than the width of the first groove.

17. The rotary brush according to claim 16, wherein: the first cap member comprises a cap-body part, in which the second groove is defined; and a flange part, which is disposed at a first end portion of the cap-body part;a first end portion of the cleaning body makes contact with the flange part in the state in which the first end portion has been inserted into the second groove;the first cap member comprises a protruding part, which protrudes from a second end surface of the cap-body part in the axial direction;the protruding part is inserted into an opening, which is defined in a first end surface of the base member; andin the state in which the protruding part has been inserted into the opening, the first end surface of the base member and the second end surface of the cap-body part oppose each other, and the second groove is continuous with the first groove.

18. The rotary brush according to claim 17, wherein: the first cap member comprises a projection part, which opposes at least a portion of an outer surface of the base member in the state in which the protruding part has been inserted into the opening;the projection part extends more radially outward than the protruding part and protrudes from the cap-body part toward the base member;the base member comprises a base-body part, which has the opening, and a plurality of rib parts, which protrude radially outward from an outer surface of the base-body part;the rib parts are spaced apart in a circumferential direction;the projection part is disposed between two of the rib parts that are adjacent to each other in the circumferential direction; andwithin a plane orthogonal to the rotational axis, the shape of an inner surface of the recessed portion is hexagonal, and the shape of an outer surface of the rotary member is hexagonal.

19. A nozzle comprising: a main body, which has a lower surface configured to oppose a surface to be cleaned;the rotary brush according to claim 1, which is supported on the main body in a rotatable manner; anda motor configured to generate a rotational force for rotating the rotary brush.

20. A cleaner comprising: the nozzle according to claim 19; anda suction fan in fluid communication with the nozzle.