CN115363474A

CN115363474A - Rotary brush for suction port body, and electric vacuum cleaner

Info

Publication number: CN115363474A
Application number: CN202210405447.1A
Authority: CN
Inventors: 吉田真浩
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2021-05-18
Filing date: 2022-04-18
Publication date: 2022-11-22
Also published as: JP2022177601A

Abstract

The rotary brush for the suction port body includes a shaft body and a cleaning element provided around the shaft body. The cleaning member includes: a plurality of soft brushes extending in the axial direction at a predetermined central angle in the circumferential direction around the axial center of the shaft body; and more than one hard brush which is arranged among the soft brushes and extends along the axial center direction. The plurality of soft brushes are configured to include crimped fibers having a cross section other than a circular shape. The one or more hard brushes are configured to include linear fibers having higher rigidity than the plurality of soft brushes. The height of the one or more other hard brushes in the rotation radius direction is lower than the height of the plurality of soft brushes in the rotation radius direction.

Description

Rotary brush for suction port body, and electric vacuum cleaner

Technical Field

The present invention relates to a rotary brush for a suction port body and a suction port body including the rotary brush.

Background

As a suction port body of a conventional electric vacuum cleaner, there is a suction port body provided with a motor-driven or turbine-driven rotary brush.

For example, a rotary brush (rotary cleaning element) described in japanese patent application laid-open No. 2009-11374 is configured such that when a cloth of the cleaning element is wound around an outer peripheral surface of a rod-shaped core rod and integrally fixed, a brush row formed of high pile and a brush row formed of low pile are substantially parallel to an axial center of the core rod. The high pile is composed of straight fibers having high rigidity, and the low pile is composed of straight fibers having high stretchability.

Disclosure of Invention

When a carpet is cleaned using a suction inlet body provided with a rotary brush of jp 2009-11374 a, although the surface of the carpet is rubbed with a pile to sweep out dirt, the pile is made of linear fibers having high rigidity, and therefore it is difficult to remove cotton-like dirt among fibers entering the surface of the carpet. In addition, when cleaning a floor, it is difficult to obtain a floor wiping effect of removing dirt (for example, scab-like dirt) adhering to the floor surface and cleaning the floor by using long nap formed of linear fibers having high rigidity.

An object of one embodiment of the present invention is to provide a rotary brush for an intake port body formed in consideration of the above circumstances, and an intake port body including the rotary brush.

One aspect of the present invention is to provide a rotary brush for a suction port body, including: a shaft body rotatably mounted in the vicinity of the suction port in the suction port main body; and a cleaning member provided around the shaft body, wherein the cleaning member includes: a plurality of soft brushes extending in the axial direction at a predetermined central angle in the circumferential direction around the axial center of the shaft body; and one or more hard brushes that are provided between the plurality of soft brushes and extend in the axial direction, the plurality of soft brushes including crimped fibers having a cross section other than a circular shape, the one or more hard brushes including linear fibers having a higher rigidity than the plurality of soft brushes,

the height of the one or more hard brushes in the direction of the rotation radius is lower than the height of the plurality of soft brushes in the direction of the rotation radius.

According to the rotary brush for a suction port body of one embodiment of the present invention, high dust removal performance can be obtained with respect to a surface to be cleaned.

Drawings

Fig. 1 is a perspective view of a first embodiment of an electric vacuum cleaner of the present invention as viewed from the rear on the right side.

Fig. 2 is a perspective view of the suction port body of the first embodiment as viewed from the front on the left side.

Fig. 3 is a perspective view of the suction port body of the first embodiment as viewed from the bottom side.

Fig. 4 is a plan view of the suction port body according to the first embodiment with the rear cover of the upper housing portion removed.

Fig. 5 is a left side sectional view of a part of the suction port body of the first embodiment.

Fig. 6 is a partial sectional view taken along line I-I of fig. 4.

Fig. 7 is a three-sided view of a shaft body of the rotary brush of the suction port body according to the first embodiment.

Fig. 8 is a cross-sectional view of the rotary brush of the suction port body of the first embodiment.

Fig. 9 is a cross-sectional view of a rotary brush of a suction port body of the second embodiment.

Detailed Description

The present invention will be described in further detail below with reference to the accompanying drawings. The following description is illustrative in all respects and should not be construed as limiting the invention.

(first embodiment)

Fig. 1 is a perspective view of a first embodiment of an electric vacuum cleaner of the present invention as viewed from the rear on the right side. In fig. 1, the front, rear, left, right, and up-down directions of the electric vacuum cleaner viewed from the user during use (during cleaning) are indicated by arrows, and the following description of the electric vacuum cleaner will be made based on the front, rear, left, and up-down directions.

< integral construction of electric vacuum cleaner >

As shown in fig. 1, the electric vacuum cleaner 1 of the first embodiment is a cyclone-type stick-type electric vacuum cleaner including a cleaner main body 10, a suction port body 60, and an extension pipe 50 that hermetically connects the cleaner main body 10 and the suction port body 60. Further, the suction port body 60 may be directly connected to the cleaner main body 10 without the extension pipe 50, and may be used as a hand-held electric cleaner.

The cleaner body 10 includes a driving device 20, a dust collecting device 30 detachably provided in the driving device 20, and a battery 40 as a power source detachably provided in the driving device 20.

The drive device 20 includes: an electric component housing section 21 for housing an electric blower, a control board, and the like, not shown; a handle 22 connected to the rear end of the electric component housing 21; an operation switch part 23 arranged on the upper part of the handle 22; a battery mounting portion 24 provided below the electrical component housing portion 21; a pipe portion 25 is provided so as to protrude forward from the upper front end of the electric component housing portion 21. A dust collecting device 30 is detachably attached along the lower end edge of the pipe portion 25 and the front end edge of the electrical component housing portion 21. Further, the central axis of the dust collecting device 30 is installed in parallel with the central axis of the pipe portion 25. In the present embodiment, the dust collecting device 30 and the pipe portion 25 are positioned in a positional relationship in which the pipe portion 25 is located above and the dust collecting device 30 is located below, but a positional relationship in which the pipe portion 25 is located below and the dust collecting device 30 is located above may be employed.

The dust collecting device 30 includes a dust collecting container part 31 and a filter part 32 detachably attached to the dust collecting container part 31.

The dust collection container portion 31 is provided with an introduction passage 31a for introducing air containing dust into the interior thereof in the peripheral portion.

According to the electric vacuum cleaner 1, when the electric blower is driven by operating the operation switch unit 23, dust on the floor surface is sucked into the interior of the vacuum cleaner body 60 from a suction port 62b (see fig. 3) described later, together with air, and the air containing the dust flows into the pipe portion 25 of the drive device 20 of the vacuum cleaner body 10 through the extension pipe 50. The air containing dust flowing into the pipe portion 25 flows into the dust collecting container portion 31 through the introduction passage 31a of the dust collecting device 30, and relatively large first dust is centrifugally separated from the air and accumulated in the dust collecting container portion 31.

The air containing the second dust smaller than the first dust flows from the inside of the dust collection container unit 31 into the inside of the filter unit 32 and is trapped. The air from which dust has been removed by the filter unit 32 flows into the electric component housing unit 21 of the drive device 20, and is discharged to the outside through an exhaust port 21a provided on the right side surface of the electric component housing unit 21.

In the electric vacuum cleaner 1, an electric wiring system is provided between the driving device 20 and the suction port body 60, and during operation, electric power of the battery 40 is supplied to and driven by a driving motor 89, described later, of the suction port body 60, and the rotary brush 80 is rotated by the driving motor 89 (see fig. 3 and 4). This point will be described in detail later.

Constitution of inhalation oral body

Fig. 2 is a perspective view of the suction port body of the first embodiment viewed from the front on the left side, and fig. 3 is a perspective view of the suction port body of the first embodiment viewed from the bottom side. Fig. 4 is a plan view of the suction port body according to the first embodiment with the rear cover of the upper housing portion removed, fig. 5 is a left side sectional view of a part of the suction port body according to the first embodiment, and fig. 6 is a sectional view of the part of fig. 4 taken along the line I-I. In fig. 2 to 6, the front, rear, left, right, and up-down directions of the suction port body viewed from the user during use (during cleaning) are indicated by arrows, and the following description of the suction port body will be made based on the front, rear, left, right, and up-down directions.

As shown in fig. 1 to 6, the suction port body 60 includes: a suction port body 61 having a suction port 62b at a bottom 62a and moving in a front-rear direction on a floor surface; a connection part 90 provided at the rear of the suction port body 61; a cylindrical communication portion 70 (see fig. 4 and the like) provided in the suction port main body 61 so as to communicate the suction port with the connection portion 90; a rotary brush 80 provided in the vicinity of the suction port 62b in the suction port body 61 and rotatable about a rotation axis in the left-right direction; and a drive motor 89 (see fig. 4) for rotating the rotary brush 80 in a direction to scrape dust on the floor surface into the cylindrical communicating portion 70.

As shown in fig. 1 to 6, the suction port body 61 has a lower casing portion 62 constituting a bottom portion 62a and an upper casing portion 65 provided on the lower casing portion 62.

The lower case portion 62 has a front portion 62c extending in the left-right direction and a rear portion 62d projecting rearward from a left-right intermediate portion of a rear end of the front portion 62c, and the front portion 62c and the rear portion 62d constitute a bottom portion 62a (see fig. 3 to 5).

In the front portion 62c of the lower housing portion 62, a suction port 62b extending in the left-right direction is provided substantially in the front half, and substantially in the rear half is a mounting portion on which the drive motor 89, the cylindrical communication portion 70, and the like are mounted (see fig. 3 to 4).

A bumper 62ca is provided at the front end of the front portion 62c, a left side wall 62cb and a right side wall 62cc continuous from the bumper 62ca are provided at the left and right edges of the front portion 62c, and left and right ribs 62ce, 62cf (see fig. 6) for supporting the left and right ends of the rotating brush 80 are provided inside the left side wall 62cb and the right side wall 62 cc.

Further, a pair of raising cloths 62cg are provided on the left and right sides of the suction port 62b on the lower surface of the bottom portion 62a of the lower case portion 62, and raising brushes 62ch are provided in the vicinity of the rear of the suction port 62 b. Thus, during floor cleaning, the left and right sides and the rear side of the suction port 62b are surrounded by the pair of the raising cloths 62cg and the raising brushes 62ch, thereby increasing the suction force in front of the suction port 62 b.

Further, a rear roller 62da (see fig. 3) is provided on the lower surface side of the rear portion 62d of the lower case 62 so as to be rotatable about the axial center in the left-right direction.

The upper case portion 65 includes: a rotary brush cover 66 provided on a front half portion of the front portion 62c of the lower housing portion 62 in such a manner as to cover an upper portion of the periphery of the rotary brush 80; and a rear cover 67 provided on a rear half portion of the front portion 62c of the lower case portion 62 so as to cover the drive motor 89, the cylindrical communication portion 70, and the like. Further, the rotating brush cover 66 and the rear cover 67 are separate members, respectively.

As shown in fig. 2 and 4 to 6, in the upper case portion 65, the rotating brush cover 66 includes a curved plate portion 66a located above the rotating brush 80 and a left side wall 66b provided at a left end portion of the curved plate portion 66a, and a front end edge 66aa of the curved plate portion 66a is coupled to an inner side of the bumper 62 ca. The right side wall of the suction port body 61 is entirely formed by the right side wall 62cc of the lower casing portion 62.

The curved plate portion 66a of the rotary brush cover 66 has a rear end edge 66ab in a direction perpendicular to the bottom portion 62a, and an end of the rear end edge 66ab has a bent portion 66ax (see fig. 5) bent rearward.

The curved plate portion 66a has an arc portion 66ay at a portion forward of the rear end edge 66ab, and has a plurality of locking holes 66az (see fig. 4) provided at predetermined intervals in the left-right direction on the rear end edge 66ab side of the arc portion 66 ay.

In order to accommodate the cylindrical communication portion 70 described later and the joint portion 91 of the connecting portion 90 described later, the intermediate portion 67a of the rear cover 67 in the left-right direction is raised, and the intermediate portion 67a is opened rearward. Further, a plurality of locking claws 67b (see fig. 5) that lock with the plurality of locking holes 66az of the rotary brush cover 66 are provided at the front end edge of the rear cover 67.

The cylindrical communicating portion 70 is a portion that communicates and connects the rotary brush housing chamber 66R and the suction port 62b inside the rotary brush cover 66 as the suction port main body 61 to the joint portion 91 of the connecting portion 90. The cylindrical communication portion 70 has a front opening 70a that is long in the left-right direction on the suction port 62b side and a cylindrical rear opening 70b on the connection portion 90 side (see fig. 5). The cylindrical communication portion 70 will be described in further detail later.

As shown in fig. 1 to 5, the connecting portion 90 includes the joint portion 91 rotatably connected to the rear opening portion 70b of the cylindrical communication portion 70 about a first axis P1 in the front-rear direction, and a tube portion 92 rotatably connected to the joint portion 91 about a second axis P2 in the left-right direction.

The joint 91 has a first member 91a and a second member 91b.

The first member 91a has a cylindrical portion 91aa on the front side, which fits into the rear opening portion 70b of the cylindrical communication portion 70 so as to be rotatable about the first axis P1, and a concave curved sliding surface portion 91ab on the rear side, which supports the lower portion of the base end portion 92a of the tube portion 92 so as to be slidable.

The second member 91b has a concave curved sliding surface portion 91ba, and the concave curved sliding surface portion 91ba is coupled to the rear end of the cylindrical portion 91aa of the first member 91a and slidably presses the convex curved surface portion 92aa above the base end portion 92a of the tube portion 92.

In the connecting portion 90, the joint portion 91 is rotatable in a range of about 180 ° in the left-right direction about the first axial center P1 with respect to the cylindrical communication portion 70, and the tube portion 92 is rotatable in a range of about 90 ° in the front-rear direction (a range from a substantially horizontal state to a substantially vertical state) about the second axial center P2 with respect to the joint portion 91.

As shown in fig. 5, the cylindrical communication portion 70 is constituted by two members, a front member 71 and a rear member 75.

In the cylindrical communication portion 70 in which the front member 71 and the rear member 75 are assembled by a plurality of screws, the front member 71 is disposed on the front side and the rear member 75 is disposed on the rear side.

The rear member 75 extends in the left-right direction, and has a cylindrical rear opening 70b at a left-right intermediate portion thereof. The axis of the rear opening 70b is disposed on the first axis P1.

The rear member 75 has a recessed portion 75a recessed rearward and extending in the left-right direction in a recessed shape in front of the rear opening portion 70b, and a semi-cylindrical portion 75b provided to connect to a left-right intermediate portion of the recessed portion 75 a. The intermediate portion of the recessed portion 75a in the left-right direction is provided in connection with the lower portion of the rear opening 70b, and the semi-cylindrical portion 75b is provided in connection with the upper portion of the rear opening 70b.

The front member 71 is a plate-like member that covers the front upper edge side of the recessed portion 75a of the rear member 75 from the front.

In the cylindrical communication portion 70 formed by combining the front member 71 and the rear member 75, the front opening portion 70a includes: an upper edge portion 70ax (lower edge portion of the front member 71) joined to the rear edge 66ab of the rotating brush cover 66; and a lower edge portion 75x (lower edge portion 75x of the rear member 75) joined to the bottom portion 62a of the lower housing portion 62 (see fig. 5).

In the cylindrical communication portion 70, the front opening portion 70a extends in the left-right direction, and the rear opening portion 70b is cylindrical, and is provided at a position intermediate in the left-right direction and higher than the height position of the front opening portion 70a from the bottom portion 62a (see fig. 5).

As shown in fig. 5, according to the suction port body 60 of the present embodiment, the joint portion between the rear end edge 66ab of the rotary brush cover 66 and the upper edge portion 70ax of the front opening portion 70a of the cylindrical communicating portion 70 is provided at a height position substantially equal to the height position of the rotation axis P3 of the rotary brush 80 from the bottom portion 62 a. In the present embodiment, the lower end surface of the bent portion 66ax of the rear end edge 66ab of the rotary brush cover 66 constituting the coupling portion is provided at a height position substantially equal to the height position of the rotation axis P3 of the rotary brush 80 from the bottom portion 62 a.

Accordingly, the brushes of the rotating brush 80 are in sliding contact with the lower end surfaces of the bent portions 66ax of the rear end edge 66ab of the rotating brush cover 66, and dust adhering to the brushes can be scraped off (see fig. 5). More specifically, the periphery of the rear portion of the rotating brush 80 (the peripheral rear portion) is in sliding contact with the lower end surface of the bent portion 66ax of the rear end edge 66ab of the rotating brush cover 66, and dust adhering to the peripheral portion of the rotating brush 80 can be scraped off. This point will be described in detail later.

< construction of rotating Brush and periphery thereof >

Fig. 7 is a three-sided view of a shaft body of a rotating brush in the suction port body of the first embodiment, and fig. 8 is a cross-sectional view of the rotating brush in the suction port body of the first embodiment. In fig. 7, the left side view is a right side view of the shaft body of the rotary brush, the right side view is a left side view of the shaft body of the rotary brush, and the figures therebetween are plan views of the shaft body of the rotary brush. In fig. 7, the left-right direction is defined in a state where the rotary brush 80 is attached to the suction port body 61 of the present embodiment shown in fig. 1 to 6.

As shown in fig. 3 and 5 to 8, the rotary brush 80 includes: a shaft body 81 rotatably attached to the vicinity of the suction port 62b in the suction port body 61; and a cleaning element provided around the shaft 81. In fig. 3 and 6, the cleaning implement of the rotary brush 80 is not shown.

As shown in fig. 5 to 7, the shaft body 81 includes: a substantially cylindrical shaft main body 81a having a plurality of spiral dovetail grooves 81as extending in a longitudinal direction at a peripheral portion thereof; a pair of

covers

81b and 81c fitted to openings at both ends of the shaft body 81 a; and a pair of pin-shaped core portions 81d fixed to the pair of

lid bodies

81b, 81c so as to be disposed on the axial center (third axial center P3) of the shaft main body 81 a.

Further, a plurality of protrusions for forming a dovetail groove are provided around the shaft main body 81a, and a dovetail groove 81as is formed in each protrusion. In the present embodiment, dovetail grooves 81as (8 dovetail grooves 81as in total) are provided at a center angle of 45 ° around the third axis P3 of the shaft main body 81 a. Note that, the dovetail groove (the groove having a narrow front side (opening side) and a wide back side (deep side) when viewed in cross section) of the present embodiment is formed in an inverted T shape (see fig. 5), but may have another shape such as a chevron shape.

The pair of

cover members

81b and 81c are fitted and fixed so as to cover both ends of the shaft main body 81a, and the pair of core portions 81d (see fig. 6) are fixed to the centers thereof. The left cover 81b is integrally connected to a pulley 81ba provided around the core 81 d.

The pair of core portions 81d are provided with bearing

members

81f and 81g at positions outside the pair of

lid members

81b and 81c with a bearing 81e interposed therebetween.

In the suction port main body 61, a space on the suction port 62b side and a space on the pulley 81ba side of the rotary brush 80 are partitioned by a partition wall 66 ba. This makes it difficult for dust sucked into the space on the suction port 62b side to enter the space on the pulley 81ba side.

The pulley 81ba of the rotary brush 80 and another pulley 86 fixed to an output shaft 89a of the drive motor 89 are coupled by a Timing belt (Timing belt) 87, and the power of the drive motor 89 is transmitted to the rotary brush 80 by a pulley/belt mechanism M. Instead of the pulley/belt mechanism M, a plurality of gears may be used to transmit the power of the drive motor 89 to the rotary brush 80.

The rib 62ce and the rib 65ce for fitting and holding the bearing portion 81f on the left side of the rotary brush 80 are provided on the left side of the suction port 62b of the suction port body 61. In addition, the rib 62cf for fitting and holding the bearing member 81g on the right side of the rotary brush 80 is provided on the right side of the suction port 62b of the suction port body 61. Thereby, the pulley 81ba of the pulley/belt mechanism M rotates, and the left core 81d, the left cover 81b, the shaft main body 81a, the right cover 81c, and the right core 81d rotate. At this time, the left and

right bearing members

81f and 81g do not rotate.

As shown in fig. 5 and 8, in the case of the present embodiment, the cleaning element of the rotary brush 80 is composed of 4 soft brushes 85a, 2 hard brushes 85b, and 2 squeegees 85c. In fig. 5, the sectional shapes of the soft brush 85a and the hard brush 85b are shown in a simplified manner.

The 4 soft brushes 85a are provided so as to extend in the direction of the third axis P3 at a central angle of 90 ° in the circumferential direction around the third axis P3 of the shaft body 81.

The 2 hard brushes 85b are provided so as to extend in the direction of the third axis P3 at every 180 ° in the circumferential direction around the third axis P3 of the shaft body 81.

The 2 rubber scrapers 85c are provided so as to extend in the direction of the third axis P3 at every 180 ° in the circumferential direction around the third axis P3 of the shaft body 81.

Therefore, in the rotating brush 80, the soft brush 85a, the hard brush 85b, the soft brush 85a, the squeegee 85c, the soft brush 85a, the hard brush 85b, the soft brush 85a, and the squeegee 85c are arranged in this order in the rotating direction (arrow a direction) of the rotating brush 80 or in the opposite direction.

As shown in fig. 8, the soft brush 85a has: an elongated base piece portion 85aa attached to the dovetail groove 81as of the shaft body 81; and bristles 85ab provided on the base plate portion 85aa and made of crimped fibers having a shape other than a circular cross section.

The cross section is not circular (irregular), and may be any cross section having a corner, and examples thereof include a star shape, a gear shape, a Y shape, a cross shape, and a triangular shape. The crimped fiber is a fiber in which each fiber is in a crimped state, and if the fiber is a resin fiber, the crimped fiber can be obtained by heating. In the present embodiment, "super-profiled crimped fiber" is used as the profiled crimped fiber (profiled crimped fiber) having a cross section other than a circular shape, but other profiled crimped fibers may be used. The "super-hetero crimp fiber" includes, for example, "SOLOTEX (ソロテックス, registered trademark) Octa (オクタ, registered trademark)" manufactured by Teijin Fr onit, and has a hollow 8-fin cross-sectional shape and crimpability.

The bristles 85ab of the soft brush 85a are formed into a bulky, lightweight three-dimensional mesh-like group of irregularly-shaped crimped fibers by intertwining irregularly-shaped crimped fibers that are twisted in a complex manner. Therefore, the brush bristles 85ab circumferentially extend to such an extent as to contact or approach the adjacent hard brush 85b and squeegee 85c (see fig. 8).

The height H1 of the soft brush 85a in the rotation radius direction from the dovetail groove 81as is set to a height to the extent that the tip end of the brush 85ab is in sliding contact with the bent portion 66ax of the rear end edge 66ab of the rotary brush cover 66 in the suction port body 61 when the rotary brush 80 is rotated in the arrow a direction. As shown in fig. 7 and 8, the ends of the brush 85ab of the soft brush 85a are pressed by the

caps

81b and 81c provided at the ends of the shaft 81, and the ends of the brush 85ab protrude toward the

caps

81b and 81c. This makes it difficult for fibrous dust such as hair to be caught by the

lid members

81b and 81c.

The hard brush 85b has: an elongated base seat portion 85ba attached to the dovetail groove 81as of the shaft body 81; and a first hard brush portion 85bb and a second hard brush portion 85bc provided on the base seat portion 85 ba.

The first hard brush portion 85bb and the second hard brush portion 85bc are constituted by linear fibers having higher rigidity than the bristles 85ab of the soft brush 85a.

Further, the second hard brush portion 85bc is formed of second linear fibers having higher rigidity than the first linear fibers forming the first hard brush portion 85bb, and is adjacent in the circumferential direction along the first hard brush portion 85 bb. At this time, the second hard brush portion 85bc is provided at a position closer to or in contact with the surface to be cleaned, i.e., at a position on the rotational direction side (arrow direction side) than the first hard brush portion 85bb (see fig. 8). In the present embodiment, the volume ratio of the second hard brush portion 85bc in the hard brush 85b is about 10%, but may be increased to about 50%.

Further, a height H2 of the hard brush 85b from the dovetail groove 81as in the rotational radial direction, that is, a height H2 of the first hard brush portion 85bb and the second hard brush portion 85bc from the dovetail groove 81as in the rotational radial direction is set to be lower than the height H1 of the soft brush 85a. Thereby, a space is formed on the tip side of the hard brush 85b between the two soft brushes 85a.

The rubber blade 85c has a base end 85ca of the dovetail groove 81as attached to the shaft body 81 and a tip end 85cb in the rotational radial direction.

The height H3 of the rubber blade 85c from the dovetail groove 81as in the rotational radius direction is set to be lower than the height H1 of the soft brush 85a. Thereby, a space is formed around the rubber blade 85c. In the present embodiment, the height H3 of the squeegee 85c is set to be lower than the height H2 of the hard brush 85b, but may be the same.

According to the rotary brush 80 configured as described above, since the trash is easily caught by the three-dimensional mesh-like group of the irregularly shaped crimped fibers (the soft brush 85 a) formed by intricately winding the irregularly shaped crimped fibers, the cotton-like trash among the fibers entering the carpet surface can be effectively removed. In addition, the soft brush 85a made of the three-dimensional mesh-like irregularly-shaped crimped fiber group can easily obtain a floor wiping effect as compared with a brush made of linear fibers, and can easily remove fibrous dust such as hair and pet hair wound around the rotary brush 80, thereby improving the sealing property around the suction port 62b and the dust suction performance at a deep portion in the suction port body 60. The deep part referred to herein means, for example, a gap between floor plates and a gap between tatami and tatami.

Further, since an appropriate space is formed by lowering the height of the hard brush 85b between the soft brushes 85a, the granular waste on the carpet easily enters the space and is sent to the suction port. Further, by providing the squeegee 85c between the soft brushes 85a, the sealing property around the suction port 62b can be adjusted, and the front dust suction performance and the deep dust suction performance of the suction port body 60 can be balanced. Further, the front dust suction performance and the deep dust suction performance of the suction port body 60 are in a trade-off relationship. When the sealing property of the rotary brush 80 is improved, the dust suction force from the front of the suction port body 60, that is, the front dust suction performance is deteriorated, and the deep dust suction performance is improved, and when the sealing property of the rotary brush 80 is lowered, the dust suction force from the front of the suction port body 60, that is, the front dust suction performance is improved, and the deep dust suction performance is deteriorated.

Further, since the front end portion of the soft brush 85a located at the rear portion around the rotating rotary brush 80 is in sliding contact with the lower end surface of the bent portion 66ax of the rear end edge 66ab of the rotary brush cover 66, dust adhering to the soft brush 85a can be scraped off (see fig. 5). At this time, even if dust which has entered the soft brush 85a and is difficult to remove, when the soft brush 85a comes into sliding contact with the lower end surface of the bent portion 66ax, the mesh of the net having the three-dimensional mesh structure is expanded, and the dust is sucked and removed. Further, since the soft brush 85a that scrapes dust on the floor surface comes into contact with the bent portion 66ax when moving to the rearmost position, the dust is effectively removed from the soft brush 85a by a synergistic effect of the centrifugal force, the airflow from the suction port 62b toward the front opening 70a, and the hitting effect by the contact with the bent portion 66 ax.

When the rotary brush 80 rotates, the front end of the hard brush 85b may be in sliding contact with the lower end surface of the bent portion 66ax of the rear end edge 66ab of the rotary brush cover 66. The tip end portions of the soft brushes 85a and the hard brushes 85b may slightly slide on the inner surface of the rotary brush cover 66 and the inner surface of the bumper 62ca, or may not contact at all. The height H3 of the rubber blade 85c is set to be low so as not to contact with the components of the suction port body 61 at all.

(second embodiment)

Fig. 9 is a cross-sectional view of a rotary brush of a suction port body of the second embodiment. In fig. 9, the same elements as those in fig. 8 are denoted by the same reference numerals.

As shown in fig. 8, a rotary brush 180 according to a second embodiment is provided with a hard brush 185c instead of the squeegee 85c of the rotary brush 80 according to the first embodiment, and the other configuration is substantially the same as that of the first embodiment.

In the second embodiment, the other hard brush 185c is composed of the first fibers for the first hard brush portion 85bb or the second fibers for the second hard brush portion 85bc of the hard brush 85b of the first embodiment.

The height H4 of the other hard brush 185c in the rotation radius direction from the dovetail groove 81as is set to be lower than the height H1 of the soft brush 85a, and is set to be approximately the same as the height H2 of the hard brush 85 b.

The rotary brush 180 of the second embodiment is also capable of adjusting the sealing property around the suction port 62b, similarly to the rotary brush 80 of the first embodiment, and thereby achieving a balance between the front dust suction performance and the deep dust suction performance of the suction port body 60 (see fig. 5).

(third embodiment)

In the first and second embodiments (see fig. 8 and 9), the case where 4 soft brushes 85a are provided at equal intervals (center angle 90 °) in the circumferential direction around the shaft body 81 is exemplified, but 3 soft brushes 85a may be provided at equal intervals (center angle 120 °) in the circumferential direction around the shaft body 81. In this case, the hard brush 85b may be provided between 2 adjacent soft brushes, or other hard brushes 185c may be provided.

In this configuration, since the interval between the 2 adjacent soft brushes 85a is widened, the space on the tip side of the hard brush 85b or the tip side of the other hard brush 185c can be widened, and the sealing property around the suction port 62b can be adjusted even in this way, so that the front dust suction performance and the deep dust suction performance of the suction port body 60 can be balanced.

(other embodiments)

In the first to third embodiments, the stick-type electric vacuum cleaner 1 is exemplified, but the rotating brush for the suction port body of the first to third embodiments can be applied to the suction port body of a suction canister-type electric vacuum cleaner or an upright-type electric vacuum cleaner.

(conclusion)

As has been described above, in the above-mentioned,

(1) A rotary brush for a suction port body according to one aspect of the present invention includes: a shaft body rotatably mounted in the vicinity of the suction port in the suction port main body; and a cleaning member provided around the shaft body, wherein the cleaning member is provided with a cleaning hole,

the cleaning member includes: a plurality of soft brushes extending in the axial direction at a predetermined central angle in the circumferential direction around the axial center of the shaft body; and one or more hard brushes that are provided between the plurality of soft brushes and extend in the axial direction, the plurality of soft brushes including crimped fibers having a cross section other than a circular shape, the one or more hard brushes including linear fibers having a higher rigidity than the plurality of soft brushes,

With this configuration, the following effects (i) to (v) can be obtained.

(i) The tip ends of the plurality of soft brushes positioned on the outermost side in the rotational radius direction of the rotating brush can strongly slide and contact the surface to be cleaned (carpet, floor, etc.). Therefore, especially, the effect of scraping off dust on the carpet surface can be obtained, and especially the following effects can be obtained: the plurality of soft brushes including crimped fibers (irregularly crimped fibers) having a cross section other than a circular shape can wind cotton-like waste in fibers entering the carpet surface, which is difficult to remove with a brush made of linear fibers. That is, the irregularly-shaped crimped fibers are not circular in cross section but are not straight and twisted in a complicated manner, and cotton waste is easily caught by a three-dimensional meshed irregularly-shaped crimped fiber group (soft brush) formed by complicated entanglement, and therefore, even cotton waste among fibers entering the surface of the carpet can be effectively removed. Further, when cleaning a carpet using a suction port body provided with a rotary brush of japanese patent application laid-open No. 2009-11374, lint may be pushed into fibers on the carpet surface.

(ii) The three-dimensional mesh-like irregularly-shaped crimped fiber group of the plurality of soft brushes also comes into contact with the surface of the floor, and therefore the contact area is increased as compared with a brush made of linear fibers. Therefore, even dirt adhering to the floor surface is removed cleanly, and the floor wiping effect is easily obtained.

(iii) Since the three-dimensional mesh-like irregularly-shaped crimped fiber group constituting the plurality of soft brushes is located at the outermost position in the rotational radius direction of the rotary brush, it is difficult for fibrous dust such as hair and pet hair to enter the inside (root side) of the irregularly-shaped crimped fiber group and become entangled. Therefore, even if the fibrous dust is wound around the rotary brush, the wound fibrous dust can be easily loosened and removed, and maintenance work can be reduced. In the rotary brush of jp 2009-11374 a, both the high pile and the low pile include linear fibers radiating from the rotation axis, and therefore, fibrous dust such as hair and pet hair enters the root side of the linear fibers and is easily and strongly entangled. Therefore, it is difficult to unwind the fibrous dust wound around the rotating brush at the time of maintenance and it takes time to remove it.

(iv) Since the plurality of soft brushes are formed of the three-dimensional mesh-like irregularly-shaped crimped fiber group, the density of each soft brush is higher than that of a brush formed of linear fibers, and as a result, the sealing property around the suction port is improved, and the dust suction performance at the deep portion in the suction port body is improved.

(v) By providing one or more hard brushes having a lower height (shorter length) in the rotation radius direction than the plurality of soft brushes between the plurality of high-density soft brushes, an appropriate space is secured between the plurality of soft brushes, and therefore, granular waste on the carpet enters the space and is easily conveyed to the suction port. If the cleaning implement is constituted only by the high-density soft brush, the pressure is increased and the suction port body is sucked to the floor surface, so that the operability is lowered, and there is a case where the granular waste on the carpet is crushed by the soft brush and is hard to be sent into the suction port. In addition, the granular dust entering the fibers on the surface side of the carpet can be scraped off by one or more hard brushes.

The rotary brush for the suction port body according to one embodiment of the present invention may be configured as described below, or may be appropriately combined.

(2) The cleaning element further comprises one or more rubber blades disposed between the plurality of soft brushes at a position different from the one or more hard brushes,

the height of the at least one rubber blade in the rotational radial direction may be lower than the height of the plurality of soft brushes in the rotational radial direction.

According to this configuration, by providing one or more rubber scrapers between the plurality of high-density soft brushes, the sealing performance around the suction port can be adjusted, and the front dust suction performance and the deep dust suction performance of the suction port body can be balanced. This ensures sufficient front dust suction performance for sucking dust by pressing the front end of the suction port body against the wall, and suppresses a reduction in operability caused by the suction port body adhering to the carpet surface.

In addition, the more than one rubber scraper blade can obtain the knocking effect of knocking the garbage on the surface of the carpet.

(3) The cleaning element further comprises one or more other hard brushes arranged between the plurality of soft brushes at a position different from the one or more hard brushes,

the one or more other hard brushes may have a height in the rotational radius direction lower than the height in the rotational radius direction of the plurality of soft brushes.

According to this configuration, similarly to the above (2), the sealing performance around the suction port can be adjusted, and the front portion dust suction performance and the deep portion dust suction performance of the suction port body can be balanced.

(4) The one or more hard brushes may each include a first hard brush portion extending in the axial direction and a second hard brush portion adjacent to the first hard brush portion in the circumferential direction, and the second hard brush portion may include second fibers having higher rigidity than first fibers constituting the first hard brush portion.

According to this configuration, the hard brush can be configured by two types of fibers (first and second fibers) having different rigidities.

(5) An intake body according to an aspect of the present invention includes: a suction port body having a suction port at a bottom thereof; and the rotating brush is rotatably arranged near the suction port in the suction port main body.

In this case, when the shaft body moves in the front-rear direction, the rotating brush may rotate in a direction in which a lower portion of the periphery of the rotating brush moves rearward, and the second hard brush portion of the one or more hard brushes may approach or contact the surface to be cleaned before the first hard brush portion.

According to this configuration, since the garbage can be scraped by the hard brush so as to start the transition from the second hard brush portion having high rigidity to the first hard brush portion, high garbage scraping performance can be obtained.

A preferred embodiment of the present invention further includes an embodiment in which any one of the above-described embodiments is combined.

The present invention may be modified in various ways in addition to the above embodiments. These variations should not be construed as falling outside the scope of the present invention. The invention is intended to include all modifications within the scope and meaning equivalent to the claims.

Claims

1. A rotary brush for a suction body, comprising: a shaft body rotatably mounted in the vicinity of the suction port in the suction port main body; and a cleaning member provided around the shaft body, wherein the cleaning member is provided with a cleaning hole,

the cleaning member includes: a plurality of soft brushes extending in the axial direction at a predetermined central angle in the circumferential direction around the axial center of the shaft body; and more than one hard brush arranged among the soft brushes and extending along the axial center direction,

the plurality of soft brushes are composed of crimped fibers having a cross section other than a circular shape,

the one or more hard brushes are composed of linear fibers having higher rigidity than the plurality of soft brushes,

2. The rotary brush for a suction port body according to claim 1,

the cleaning element further comprises one or more rubber blades disposed between the plurality of soft brushes at a position different from the one or more hard brushes,

the height of the one or more rubber scrapers in the rotating radius direction is lower than the height of the plurality of soft brushes in the rotating radius direction.

3. The rotary brush for a suction port body according to claim 1,

the cleaning element further comprises one or more other hard brushes arranged between the plurality of soft brushes at a position different from the one or more hard brushes,

the one or more other hard brushes have a height in the rotational radial direction lower than the height of the plurality of soft brushes in the rotational radial direction.

4. A rotary brush for a suction port body as claimed in any one of claims 1 to 3,

the at least one hard brush has a first hard brush portion extending in the axial direction and a second hard brush portion adjacent to the first hard brush portion in the circumferential direction,

in the one or more hard brushes, the second hard brush part includes second fibers having higher rigidity than the first fibers constituting the first hard brush part.

5. An intake body, comprising: a suction inlet body having a suction inlet at the bottom; and the rotary brush for a suction inlet body according to any one of claims 1 to 4, which is rotatably provided in the vicinity of the suction inlet in the suction inlet body.

6. The suction port body as set forth in claim 5,

when the shaft body moves in the front-rear direction, the rotating brush rotates in a direction in which a lower portion of the periphery of the rotating brush moves rearward, and the second hard brush portion according to claim 4 of the one or more hard brushes approaches or contacts the surface to be cleaned before the first hard brush portion.

7. An electric vacuum cleaner, comprising: a cleaner main body which sucks air containing external dust by a built-in electric blower; and the suction port body of claim 5 or 6, which is connected to the cleaner main body directly or via an extension pipe.