AU2020201882A1 - Vacuum cleaner - Google Patents

Vacuum cleaner Download PDF

Info

Publication number
AU2020201882A1
AU2020201882A1 AU2020201882A AU2020201882A AU2020201882A1 AU 2020201882 A1 AU2020201882 A1 AU 2020201882A1 AU 2020201882 A AU2020201882 A AU 2020201882A AU 2020201882 A AU2020201882 A AU 2020201882A AU 2020201882 A1 AU2020201882 A1 AU 2020201882A1
Authority
AU
Australia
Prior art keywords
nozzle body
cleaning unit
rotary cleaning
filaments
fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU2020201882A
Inventor
Daeho CHANG
Moohyun KO
Jungwan Ryu
Ingyu Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PCT/KR2018/004582 external-priority patent/WO2018194407A1/en
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Priority to AU2020201882A priority Critical patent/AU2020201882A1/en
Publication of AU2020201882A1 publication Critical patent/AU2020201882A1/en
Priority to AU2022200215A priority patent/AU2022200215B2/en
Abandoned legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/24—Hand-supported suction cleaners
    • A47L5/26—Hand-supported suction cleaners with driven dust-loosening tools
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/001—Cylindrical or annular brush bodies
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/001—Cylindrical or annular brush bodies
    • A46B13/006—Cylindrical or annular brush bodies formed by winding a strip tuft in a helix about the body
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/02—Brushes with driven brush bodies or carriers power-driven carriers
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/06—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by welding together bristles made of metal wires or plastic materials
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0427—Gearing or transmission means therefor
    • A47L9/0433—Toothed gearings
    • A47L9/0438—Toothed gearings with gears having orbital motion, e.g. planetary gearing
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0461—Dust-loosening tools, e.g. agitators, brushes
    • A47L9/0466—Rotating tools
    • A47L9/0477—Rolls
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2889—Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/30—Brushes for cleaning or polishing
    • A46B2200/3033—Household brush, i.e. brushes for cleaning in the house or dishes

Abstract

CW nte ovenWNRPortb|WDCCWDERW19982450_1.docx-3/16/2020 A vacuum cleaner, comprising: a cleaner body; and 5 a suction nozzle connected to the cleaner body, wherein the suction nozzle comprises: a housing defining an opening at a front portion of the housing, and a rotary cleaning unit located inside of the housing and 0 configured to rotate relative to the housing, at least a portion of the rotary cleaning unit being exposed through the opening of the housing, wherein the rotary cleaning unit comprises: a nozzle body rotatably coupled to an inside of the 5 housing, the nozzle body having a cylindrical shape; a strap portion that includes a plurality of fiber filaments; and an antistatic portion that includes both of a plurality of fiber filaments and a plurality of metal filaments, and 20 wherein the strap portion and the antistatic portion are alternately disposed along an outer circumferential surface of the nozzle body and extend in at least one of a lengthwise direction of the nozzle body, a circumferential direction of the nozzle body and a spiral direction of the nozzle body. 132,133 131a 131lb 134 132 133

Description

VACUUM CLEANER [Technical Field]
The present disclosure relates to a structure capable of preventing static electricity generated in a vacuum cleaner from 5 being transmitted to a user.
[Background]
A vacuum cleaner refers to a device that sucks dust and air using a suction force generated in a suction motor mounted inside a cleaner body and separates dust from the air for collection.
Such vacuum cleaners are divided into a canister cleaner, an upright cleaner, a stick cleaner, a handy cleaner, and a robot cleaner. For the canister cleaner, a suction nozzle for sucking dust is provided separately from a cleaner body, and connected to the cleaner body by a connecting device. For the upright cleaner, a suction nozzle is rotatably coupled to a cleaner body. The stick cleaner and the handy cleaner are used in a state where a user grips a cleaner body with a hand. However, a suction motor of the stick cleaner is disposed close to a suction nozzle (a lower center) and a suction motor of the handy cleaner is disposed close to a grip portion (an upper center). The robot cleaner travels by itself owing to an autonomous travel system so as to perform cleaning by itself.
A suction nozzle refers to a portion that is in contact with a floor to directly suck dust and air. A suction force generated in the suction motor mounted inside the cleaner body is transferred to the suction nozzle, and dust and air are sucked into the suction nozzle by the suction force.
The suction nozzle is provided with a rotary cleaning unit (or an agitator). The rotary cleaning unit scrapes (or sweeps) dust from a floor or carpet in a rotating manner so as to
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 2 improve a cleaning performance. A brush is attached to the rotary cleaning unit to cause friction against the floor or the carpet.
When the brush causes the friction against the floor, static electricity is naturally generated due to the friction. Especially, when the brush causes the friction against the carpet, a generation frequency of the static electricity further increases .
However, the problem is that the generated static electricity is transmitted to the user along the cleaner body or an electric wire. Especially, in the case of the stick cleaner or the handy cleaner, since the user grips the cleaner body, the static electricity is likely to be directly transmitted to the user .
Among prior art documents, Korean Patent Publication No.
10-2012-0027357 (Mar. 21, 2012) and the like disclose configurations for preventing the generation or transfer of the static electricity. However, since the above-mentioned patent simply defines the property of filaments only as sheet _0 resistance, there is a limit to be substantially applied to a vacuum cleaner.
It is desired to address or ameliorate one or more disadvantages or limitations associated with the prior art, or to at least provide a useful alternative.
[Summary]
According to the present invention there is provided a vacuum cleaner, comprising:
a cleaner body; and a suction nozzle connected to the cleaner body, wherein the suction nozzle comprises:
a housing defining an opening at a front portion of the
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 3 2020201882 16 Mar 2020 housing, and a rotary cleaning unit located inside of the housing and configured to rotate relative to the housing, at least a portion of the rotary cleaning unit being exposed through the opening of 5 the housing, wherein the rotary cleaning unit comprises:
a nozzle body rotatably coupled to an inside of the housing, the nozzle body having a cylindrical shape;
a strap portion that includes a plurality of fiber filaments; and an antistatic portion that includes both of a plurality of fiber filaments and a plurality of metal filaments, and wherein the strap portion and the antistatic portion are alternately disposed along an outer circumferential surface of the nozzle body and extend in at least one of a lengthwise direction of the nozzle body, a circumferential direction of the nozzle body and a spiral direction of the nozzle body.
[Brief Description of the Drawings]
Preferred embodiments of the present invention are hereinafter described, by way of non-limiting example only, with reference to the accompanying drawings, in which:
FIG. 1 is a perspective view of a vacuum cleaner in accordance with one embodiment of the present disclosure.
FIG. 2 is a perspective view of a suction nozzle of FIG. 1.
FIG. 3 is a planar view of the suction nozzle of FIG. 2.
FIG. 4 is a lateral view of the suction nozzle of FIG. 1.
FIG. 5 is a front view of the suction nozzle of FIG. 1.
FIG. 6 is a view illustrating a state in which a rotary cleaning unit is detached from the suction nozzle of FIG. 5.
FIG. 7 is a bottom view of the suction nozzle of FIG. 1.
FIG. 8 is an exploded perspective view of the suction
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 4 2020201882 16 Mar 2020 nozzle of FIG. 1.
FIG. 9 is an exploded perspective view of a housing.
FIG. 10 is a sectional view of the suction nozzle cut along the line 1-1' of FIG. 7.
FIG. 11 is a sectional view taken along the line 11-11' of
FIG. 7.
FIG. 12 is a view illustrating a state in which a first side cover of a suction nozzle is removed.
FIG. 13 is an exploded perspective view of a driving unit.
FIG. 14 is a sectional view illustrating the driving unit cut along a rotating shaft of a rotary cleaning unit.
FIG. 15 is a conceptual view illustrating an example of the rotary cleaning unit.
FIG. 16 is a conceptual view illustrating a fabricating process of the rotary cleaning unit.
FIG. 17 is a conceptual view illustrating another example of the rotary cleaning unit.
FIG. 18 is a conceptual view illustrating another example of the rotary cleaning unit.
_0 FIG. 19 is a conceptual view illustrating another example of the rotary cleaning unit.
FIG. 20 is a sectional view illustrating another example of a suction nozzle.
FIG. 21 is an enlarged sectional view of a portion A of
FIG. 20.
FIG. 22 is a conceptual view of the rotary cleaning unit and a first bracket coupled to the rotary cleaning unit. [Detailed Description]
One aspect of the present disclosure is to provide a vacuum cleaner having a structure capable of preventing static electricity generated by rotation of a rotary cleaning unit from
GWInterwovenWNRPortblWDCCWDERW19982450J.docx-3/16/2020
2020201882 16 Mar 2020
- 5 being transferred to a user.
Another aspect of the present disclosure is to provide a vacuum cleaner having a configuration capable of preventing deterioration in cleaning performance or overload of a suction motor owing to an antistatic structure.
Another aspect of the present disclosure is to provide a vacuum cleaner having a configuration capable of enhancing reliability of an antistatic structure.
A vacuum cleaner according to the present disclosure may include a rotary cleaning unit configured to clean a floor by a rotating operation. The rotary cleaning unit may include a rotatable nozzle body, and fiber filaments and metal filaments arranged on an outer circumferential surface of the nozzle body.
The vacuum cleaner may include a cleaner body having a suction motor provided inside thereof and a handle provided outside thereof, and a suction nozzle connected to the cleaner body .
The suction nozzle may include a housing having at least part of a front surface thereof opened. The rotary cleaning unit _0 may be provided inside the housing, and at least part thereof may be exposed through the front opening of the housing.
The nozzle body may be rotatably installed inside the housing and have a cylindrical shape.
The metal filament may include a fiber filament, and a conductive coating layer coated on an outer circumferential surface of the fiber filament.
The conductive coating layer may be formed of brass or digenite (Cu9S5).
The conductive coating layer may have an average thickness of 0.3 to 1.0 pm.
The metal filament may have an average thickness of 220 to
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 6 260 dTex (deci-Tex).
A number ratio of the metal filaments to the sum of the fiber filaments and the metal filaments may be 2.5% or more.
An area ratio of the metal filaments on the outer circumferential surface of the nozzle body may be 2.5% or more.
Electric resistance of the single metal filament may be 100 kQ or less.
Tensile strength of the single metal filament may be 3.5 cN/dTex (centi Newton/deci-Tex) or more.
A tensile elongation of the single metal filament may be 33 to 45%.
A surface resistance value of the rotary cleaning unit may be 1 x 102 to 1 x 103 Ω / 10 cm.
A specific resistance value of the metal filament may be 1 x 10-1 to 1 x 10-2 Ω / 10 cm.
Each of the fiber filament and the metal filament may be formed by twisting a bundle of threads.
The rotary cleaning unit may further include a fiber layer disposed to surround the outer circumferential surface of the _0 nozzle body. The fiber layer may be provided with a plurality of planting portions spaced apart from each other such that the fiber filaments and the metal filaments are planted therein.
Each of the planting portions may be provided with a hole and a bridge crossing the hole.
A center of the fiber filament and a center of the metal filament may be fixed to the bridge, and both ends of each of the fiber filament and the metal filament may extend away from a center of the nozzle body.
The rotary cleaning unit may further include a supporting portion supporting the fiber filaments and the metal filaments.
The supporting portion may be disposed between the nozzle body and the fiber layer and formed by curing an adhesive.
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 7 The supporting portion may extend along a lengthwise, circumferential or spiral direction of the nozzle body.
The rotary cleaning unit may include a strap portion provided with the fiber filaments, and an antistatic portion 5 provided with both the fiber filaments and the metal filaments.
The strap portion and the antistatic portion may extend along a lengthwise, circumferential, or spiral direction of the nozzle body.
The strap portion and the antistatic portion may have the 0 same width.
The nozzle body may be formed of an extrusion-molded metal
material.
The metal material may include aluminum.
The suction nozzle may include a support member inserted
into at least one end portion of the nozzle body to rotatably support the nozzle body and formed of a material different from that of the nozzle body, and a bracket coupled to the end portion of the nozzle body to be in surface-contact with the support member.
_0 A mutual contact surface between the support member and the bracket may be inclined with respect to the lengthwise direction of the nozzle body.
The support member may include a bearing installed around a shaft extending along the lengthwise direction of the nozzle body, and a bearing cover disposed to enclose the bearing and formed of a material different from that of the nozzle body, and the bracket may be disposed between the nozzle body and the bearing cover.
The bracket may include a nozzle body coupling portion having a circular shape to be coupled to the end portion of the nozzle body, an extending portion extending from the nozzle body coupling portion into the nozzle body along an inner
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 8 circumferential surface of the nozzle body, and a surfacecontact portion protruding from an inner circumferential surface of the nozzle body coupling portion to be in surface-contact with the bearing cover.
The extending portion and the surface-contact portion may be alternately arranged.
The support member may include a rotation supporting portion coupled to a side cover of the suction nozzle and inserted into one end portion of the nozzle body to rotatably 0 support the nozzle body, and the bracket may be disposed between the nozzle body and the rotation supporting portion.
The bracket may include a nozzle body coupling portion having a circular shape to be coupled to the end portion of the nozzle body, an extending portion extending from the nozzle body 5 coupling portion into the nozzle body along an inner circumferential surface of the nozzle body, and a shaft coupling portion extending from the extending portion toward the shaft so as to be coupled to a shaft that transmits a driving force generated from the driving unit to the nozzle body.
_0 The nozzle body may be provided with a protrusion protruding from an inner circumferential surface of the nozzle body. The protrusion may extend along a lengthwise direction of the nozzle body, and the bracket may come in contact with the protrusion so as to press the protrusion in a rotating direction of the nozzle body.
According to the present disclosure having the abovedescribed structure, metal filaments provided on a rotary cleaning unit can serve as a passage for charging or neutralizing static electricity generated in fiber filaments.
Therefore, the static electricity generated in the fiber filaments can be discharged or eliminated through the metal filaments before being transmitted to the user.
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 9 2020201882 16 Mar 2020
In addition, the present disclosure can provide an optimum average thickness of a conductive coating layer or an optimal average thickness of a metal filament, so as to prevent deterioration of a cleaning performance due to an antistatic structure or overload of a suction motor.
Further, the present disclosure can improve reliability of an antistatic structure by providing an optimal physical property value of the metal filament.
Hereinafter, some embodiments of the present disclosure will be described in detail with reference to exemplary drawings. For the sake of brief description with reference to the drawings, the same or equivalent components may be provided with the same or similar reference numbers, and description thereof will not be repeated. In describing the present disclosure, if a detailed explanation for a related known function or construction is considered to unnecessarily divert the gist of the present disclosure, such explanation has been omitted but would be understood by those skilled in the art.
It will be understood that although the terms first, _0 second, A, B, (a), (b), etc. may be used herein to describe various elements of the embodiments of the present disclosure. These terms are generally only used to distinguish one element from another, and nature, sequence or order of the element is not limited by the term. It will be understood that when an element is referred to as being connected with or coupled to another element, the element can be connected with the another element or intervening elements may also be present. In contrast, when an element is referred to as being connected with or coupled to another element, there are no intervening elements present.
FIG. 1 is a perspective view of a vacuum cleaner in accordance with one embodiment of the present disclosure.
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 10 2020201882 16 Mar 2020
Referring to FIG. 1, a vacuum cleaner 1 according to an embodiment of the present disclosure may include a cleaner body 10 having a suction motor (not shown) therein for generating a suction force, a suction nozzle 100 through which air containing 5 dust is sucked, and an extension pipe 17 connecting the suction nozzle 100 and the cleaner body 10 to each other.
Although not shown, the suction nozzle 100 may be directly connected to the cleaner body 10 without the extension pipe 17.
The cleaner body 10 may include a dust container 12 storing 0 therein dust separated from air. Accordingly, the dust introduced through the suction nozzle 100 may be stored in the dust container 12 via the extension pipe 17.
A handle 13 which the user grips may be provided on an outside of the cleaner body 10. The user can perform cleaning while gripping the handle 13.
The cleaner body 10 may be provided with a battery (not shown), and the cleaner body 10 may be provided with a battery receiving portion 15 for receiving the battery therein. The battery receiving portion 15 may be provided in a lower portion _0 of the handle 13. The battery (not shown) may be connected to the suction nozzle 100 to supply power to the suction nozzle 100 .
Hereinafter, the suction nozzle 100 will be described in detail.
FIG. 2 is a perspective view of a suction nozzle of FIG. 1,
FIG. 3 is a planar view of the suction nozzle of FIG. 2, FIG. 4 is a lateral view of the suction nozzle of FIG. 1, FIG. 5 is a front view of the suction nozzle of FIG. 1, FIG. 6 is a view illustrating a state in which a rotary cleaning unit is detached from the suction nozzle of FIG. 5, FIG. 7 is a bottom view of the suction nozzle of FIG. 1, FIG. 8 is an exploded perspective view of the suction nozzle of FIG. 1, FIG. 9 is an exploded
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 11 2020201882 16 Mar 2020 perspective view of a housing, FIG. 10 is a sectional view of the suction nozzle cut along the line 1-1' of FIG. 7, and FIG.
is a sectional view taken along the line 11-11' of FIG. 7.
Referring to FIGS. 2 to 11, the suction nozzle 100 includes 5 a housing 110, a connection pipe 120, and a rotary cleaning unit 130 .
The housing 110 includes a body portion 111 in which a chamber 112 is formed. The body portion 111 may be provided with a front opening Illa through which air containing contaminants 0 is sucked. The air introduced through the front opening Illa by a suction force generated in the cleaner body 10 may be moved to the connection pipe 120 via the chamber 112.
The front opening Illa extends in a left and right direction of the housing 110. The front opening Illa may extend 5 even up to the front of the housing 110 as well as the bottom of the housing 110. This may result in securing a sufficient suction area, thereby evenly cleaning even a portion of a floor adjacent to a wall surface.
The housing 110 may further include an internal pipe 1112 _0 communicating with the front opening Illa. The suction force generated in the cleaner body 10 may allow external air to move into an inner flow path 1112a of the internal pipe 1112 through the front opening Illa.
The housing 110 may further include a driving unit 140 for supplying a driving force for rotating the rotary cleaning unit 130. The driving unit 140 may be inserted into one side of the rotary cleaning unit 130 to supply the driving force to the rotary cleaning unit 130. The driving unit 140 will be described in detail with reference to FIG. 12.
The rotary cleaning unit 130 may be accommodated in the chamber 112 of the body portion 111. At least part of the rotary cleaning unit 130 may be externally exposed through the front
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 12 opening Illa. The rotary cleaning unit 130 may rub against the floor while being rotated by the driving force transferred from the driving unit 140, thereby shaking out (sweeping, scraping) contaminants. In addition, an outer circumferential surface of the rotary cleaning unit 130 may be made of fabric such as cotton flannel or a felt material. Accordingly, while the rotary cleaning unit 130 rotates, foreign substances such as dust accumulated on the floor may be stuck in the outer circumferential surface of the rotary cleaning unit 130 so as to 0 be effectively removed.
The body portion 111 may cover at least part of an upper side of the rotary cleaning unit 130. An inner circumferential surface of the body portion 111 may have a curved shape to correspond to the shape of the outer circumferential surface of 5 the rotary cleaning unit 130. Accordingly, the body portion 111 can perform a function of preventing foreign substances, which are swept from the floor while the rotary cleaning unit 1309 rotates, from being moved upward.
The housing 110 may further include side covers 115 and 116 _0 covering both sides of the chamber 112. The side covers 115 and
116 may be provided on both side surfaces of the rotary cleaning unit 130.
The side covers 115 and 116 include a first side cover 115 disposed on one side of the rotary cleaning unit 130 and a second side cover 116 disposed on another side of the rotary cleaning unit 130. The first side cover 115 may be fixedly coupled with the driving unit 140.
The suction nozzle 100 further includes a rotation supporting portion 150 provided on the second side cover 116 to 30 rotatably support the rotary cleaning unit 130. The rotation supporting portion 150 may be inserted into another side of the rotary cleaning unit 130 so as to rotatably support the rotary
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 13 cleaning unit 130.
The rotary cleaning unit 130 may rotate in a counterclockwise direction with reference to the sectional view of FIG. 10. That is, the rotary cleaning unit 130 rotates in a manner of pushing foreign substances or impurities from a contact point with the floor toward the internal pipe 112. Accordingly, the foreign substances swept away from the floor by the rotary cleaning unit 130 move toward the internal pipe 1112, and are sucked into the internal pipe 1112 by the suction force.
As the rotary cleaning unit 130 rotates backward with respect to the contact point with the floor, cleaning efficiency can be improved.
The chamber 112 may be provided with a partition member
160. The partition member 160 may extend from top to bottom of the housing 110.
The partition member 160 may be provided between the rotary cleaning unit 130 and the internal pipe 1112. The partition member 160 may divide the chamber 112 of the housing 110 into a first region 112a in which the rotary cleaning unit 130 is _0 provided and a second region 112b in which the internal pipe 1112 is provided. As illustrated in FIG. 10, the first region 112a may be provided in a front portion of the chamber 212, and the second region 112b may be provided in a rear portion of the chamber 212.
The partition member 160 may be provided with a first extending wall 161. The first extending wall 161 may extend such that at least part thereof is brought into contact with the rotary cleaning unit 130. Accordingly, when the rotary cleaning unit 130 rotates, the first extending wall 161 may rub against the rotary cleaning unit 130 to sweep away foreign substances stuck in the rotary cleaning unit 130.
The first extending wall 161 may extend along a rotating
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 14 shaft of the rotary cleaning unit 130. That is, a contact point between the first extending wall 161 and the rotary cleaning unit 130 may be formed along the rotating shaft of the rotary cleaning unit 130. Accordingly, the first extending wall 161 can 5 remove foreign substances stuck in the rotary cleaning unit 130 and simultaneously prevent the foreign substances on the floor from being introduced into the first region 112a of the chamber 112. As the foreign substances are prevented from being introduced into the first region 112a of the chamber 112, the foreign substances can be prevented from being discharged to the front of the housing 110 through the front opening Illa due to the rotation of the rotary cleaning unit 130.
In addition, the first extending wall 161 can prevent hair or yarn stuck in the rotary cleaning unit 130 from being introduced into the first region 112a of the chamber 112, so as to prevent such hair or yarn from being tangled around the rotary cleaning unit 130. That is, the first extending wall 161 may perform an anti-tangle function.
The partition member 160 may further be provided with a _0 second extending wall 165. The second extending wall 165, similar to the first extending wall 161, may extend such that at least part thereof is brought into contact with the rotary cleaning unit 130. Accordingly, when the rotary cleaning unit 130 rotates, the second extending wall 165 may rub against the rotary cleaning unit 130 like the first extending wall 161 so as to sweep away the foreign substances stuck in the rotary cleaning unit 130. On the other hand, the second extending wall 165 has the same function as the first extending wall 161 and the function of sweeping away the foreign substances stuck in the rotary cleaning unit 130 can be executed only by the first extending wall 161 without the second extending wall 165.
Therefore, the second extending wall 165 may not be included in
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 15 2020201882 16 Mar 2020 the structure of the housing 110.
The second extending wall 165 may be disposed higher than the first extending wall 161. Accordingly, the second extending wall 165 has a function of secondarily separating foreign substances which have not been removed from the rotary cleaning unit 130 by the first extending wall 161.
Hereinafter, a flow of air inside the housing 110 will be described.
A plurality of suction flow paths Fl, F2 and F3 are formed 0 in the body portion 111 of the suction nozzle 100 such that
external air flows into the internal pipe of the body portion
111.
The plurality of suction flow paths Fl, F2 and F3 include a
lower flow path Fl formed in a lower side of the rotary cleaning
unit 130, and upper flow paths F2 and F3 formed in an upper side of the rotary cleaning unit 130.
The lower flow path Fl is formed in the lower side of the rotary cleaning unit 130. Specifically, the lower flow path Fl is connected from the front opening Illa to the inner flow path _0 1112a via the lower side of the rotary cleaning unit 130 and the second region 112b.
The upper flow paths F2 and F3 are formed in the upper side of the rotary cleaning unit 130. Specifically, the upper flow paths F2 and F3 may be connected to the inner flow path 1112a 25 via the upper side of the rotary cleaning unit 130 within the first region 112a and the second region 112b. Accordingly, the upper flow paths F2 and F3 may join the lower flow path Fl in the second region 112b.
The upper flow paths F2 and F3 include a first upper flow 30 path F2 formed in one side of the housing 110 and a second upper flow path F3 formed in another side of the housing 110.
Specifically, the first upper flow path F2 is disposed adjacent
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 16 to the first side cover 115, and the second upper flow path F3 is disposed adjacent to the second side cover 116.
To form the first upper flow path F2, a first lower groove 161a may be formed in the first extending wall 161 and a first 5 upper groove 165a may be formed in the second extending wall
165 .
The first lower groove 161a is formed by recessing a part of an inner circumferential surface of the first extending wall 161, that is, a surface of the first extending wall 161 which is 0 in contact with the rotary cleaning unit 130. In addition, the first lower groove 161a may extend along a circumferential direction of the rotary cleaning unit 130.
The first upper groove 165a is formed by recessing a part of an inner circumferential surface of the second extending wall 5 165, that is, a surface of the second extending wall 165 which is in contact with the rotary cleaning unit 130. The first upper groove 165a may extend along the circumferential direction of the rotary cleaning unit 130.
The first lower groove 161a is connected to the first upper _0 groove 165a and the first upper flow path F2 is formed along the first lower groove 161a and the first upper groove 165a. Meanwhile, when the suction nozzle 100 is not provided with the second extending wall 165, the first upper flow path F2 may be formed only by the first lower groove 161a.
The first lower groove 161a and the first upper groove 165a may be formed to surround the driving unit 140. The first upper flow path F2 may be formed to surround at least part of the driving unit 140 along a periphery of the driving unit 140. The driving unit 140 may be cooled by air which flows along the first upper flow path F2.
The first lower groove 161a and the first upper groove 165a may have the same width A in the left and right direction, as
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 17 illustrated, but the present disclosure is not limited to this feature. The width A of each of the first lower groove 161a and the first upper groove 165a in the left and right direction may have a predetermined value. When the width A in the left and right direction is small, the width of the first upper flow path F2 is narrowed. Accordingly, a flow rate of air may be reduced or a flow of air may be blocked so as to cause an insignificant cooling performance of the driving unit 140. On the other hand, when the width A in the left and right direction is large, the width of the first upper flow path F2 is increased and accordingly the flow rate of air may be increased. However, an anti-tangle function of hair or the like of the rotary cleaning unit 130 by the first extending wall 161 and the second extending wall 165 may be degraded. Therefore, the width A in the left and right direction should have an appropriate value, and may be smaller than a length of the driving unit. For example, the width A of the first upper groove 165a in the left and right direction may be 5 to 10 mm, but is not limited thereto .
_0 As illustrated in FIG. 11, a spaced distance between the inner circumferential surface of the chamber 112 and the upper side of the rotary cleaning unit 130 in the first upper flow path F2 may become narrower toward the inner side of the chamber 112. Specifically, the spaced distance between the inner circumferential surface of the chamber 112 and the upper side of the rotary cleaning unit 130 is dl at the side of the front opening Illa, d2 at the first upper groove 165a, and d3 at the first lower groove 161a. The spaced distance has a smaller value from dl to d3 (dl> d2> d3). For example, dl may be 3 mm, d2 may be 2.7 mm, and d3 may be 2 mm. With such a feature, a flow rate of air may be reduced toward the front opening Illa in the upper side of the rotary cleaning unit 130, which may prevent foreign
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 18 2020201882 16 Mar 2020 substances from being discharged to the front due to the rotation of the rotary cleaning unit 130.
Hereinafter, the second upper flow path F3 will be described. To form the second upper flow path F3, a second lower groove 161b is formed in the first extending wall 161 and a second upper groove 165b is formed in the second extending wall 165 .
The second lower groove 161b is formed at a position adjacent to the second side cover 116 on the inner circumferential surface of the first extending wall 161, that is, a surface of the first extending wall 161 which is in contact with the rotary cleaning unit 130. The second lower groove 161b is different from the first lower groove 161a in position where the second lower groove 161b is formed, and the remaining components are substantially the same.
The second upper groove 165b is formed at a position adjacent to the second side cover 116 on the inner circumferential surface of the second extending wall 165, that is, the surface of the second extending wall 165 which is in _0 contact with the rotary cleaning unit 165. The second upper groove 165b is connected to the second lower groove 161b and the second upper flow path F3 is formed along the second lower groove 161b and the second upper groove 165b. On the other hand, when the suction nozzle 100 is not provided with the second extending wall 165, the second upper flow path F3 may be formed only by the second lower groove 161b.
The second lower groove 161b and the second upper groove
165b may be formed to surround the rotation supporting portion 150. Accordingly, the second upper flow path F3 may be formed 30 along a periphery of the rotation supporting portion 150, and the rotation supporting portion 150 may be cooled by air which flows along the second upper flow path F3.
C:WlnterwovenWNRPortblWDCCWDERW19982450J.docx-3/16/2020
2020201882 16 Mar 2020
- 19 The second lower groove 161b and the second upper groove 165b may have the same width A in the left and right direction, but the present disclosure is not limited to this feature. The width A of each of the second lower groove 161b and the second upper groove 165b in the left and right direction may be the same as the width A of each of the first lower groove 161a and the first upper groove 165a in the left and right direction.
A spaced distance between the inner circumferential surface of the chamber 112 and the upper side of the rotary cleaning unit 130 in the second upper flow path F3 may be decreased toward the inner side of the chamber 112, similar to that in the first upper flow path F2. Therefore, detailed description thereof will be omitted.
The partition member 160 may further be provided with a third extending wall 163 that is coupled to the first extending wall 161. The third extending wall 163 may be coupled to a rear surface of the first extending wall 161 to support the first extending wall 161. As the first lower groove 161a and the second lower groove 161b are formed in the first extending wall _0 161, the third extending wall 163 may be partially exposed at the first region 112a of the chamber 112.
As such, the housing 110 is provided with not only the lower flow path Fl provided in the lower side of the rotary cleaning unit 130 but also the first upper flow path F2 provided 25 in the upper side of the rotary cleaning unit 130, which may result in efficiently cooling the driving unit 140. The housing 110 is also provided with the second upper flow path F3, which may result in efficiently cooling the rotation supporting portion 150.
The connection pipe 120 may connect the housing 110 and the extension pipe 17 (see FIG. 1). That is, one side of the connection pipe 120 is connected to the housing 110 and another
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 20 side of the connection pipe 120 is connected to the extension pipe 17.
The connection pipe 120 may be provided with a detachable button 122 for manipulating mechanical coupling with the extension pipe 17. The user can couple or separate the connection pipe 120 and the extension pipe 17 by manipulating the detachable button 122.
The connection pipe 120 may be rotatably connected to the housing 110. Specifically, the connection pipe 120 may be hinge0 coupled to a first connection member 113a so as to be vertically rotatable .
The housing 110 may be provided with connection members 113a and 113b for hinge-coupling with the connection pipe 120. The connecting members 113a and 113b may be formed to surround the internal pipe 1112. The connection members 113a and 113b may include a first connection member 113a and a second connection member 113b which are directly connected to the connection pipe 120. One side of the second connection member 113b may be coupled to the first connection member 113a and another side of _0 the second connection member 113b may be coupled to the body portion 111.
As illustrated in FIG. 8, a hinge hole 114 is formed in the first connection member 113a, and a hinge shaft 124 inserted into the hinge hole 114 may be provided on the connection pipe 25 120. However, unlike the illustrated embodiment, a hinge hole may be formed in the connection pipe 120 and a hinge shaft may be formed on the first connection member 113a. The hinge hole 114 and the hinge shaft 124 may collectively be referred to as hinge portion.
A center 124a of the hinge shaft 124 may be disposed higher than a center axis C of the first connection member 113a.
Accordingly, a rotation center of the connection pipe 120 may be
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 21 2020201882 16 Mar 2020 formed higher than the center axis C of the first connection member 113a.
The first connection member 113a may be rotatably connected to the second connection member 113b. Specifically, the first 5 connection member 113a may be rotatable along a lengthwise direction as a rotation axis.
The suction nozzle 100 may further include an auxiliary hose 123 connecting the connection pipe 120 and the internal pipe 1112 of the housing 110 to each other. Accordingly, air 0 introduced into the housing 110 may flow toward the cleaner body 10 (see FIG. 1) along the auxiliary hose 123, the connection pipe 120, and the extension pipe 17 (see FIG. 1) .
The auxiliary hose 123 may be made of a flexible material so that the connection pipe 120 can rotate. In addition, the 5 first connection member 113a may have a shape of enclosing at least part of the auxiliary hose 123 to protect the auxiliary hose 123.
The suction nozzle 100 may further include front wheels 117a and 117b for movement during cleaning. The front wheels _0 117a and 117b may be rotatably provided on a bottom surface of the housing 110. The front wheels 117a and 117b may be provided as a pair located at both sides of the front opening Illa and may be disposed at the rear of the front opening Illa.
The suction nozzle 100 may further include a rear wheel
118. The rear wheel 118 may be rotatably provided on the bottom surface of the housing 110 and disposed behind the front wheels 117a and 117b.
The housing 110 may further include a support member 119 provided at the lower side of the body portion 111. The support 30 member 119 may support the body portion 111. The front wheels 117a and 117b may be rotatably coupled to the support member 119 .
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 22 The support member 119 may be provided with an extending portion 1192 extending to the rear thereof. The extending portion 1192 may be rotatably coupled to the rear wheel 118. In addition, the extending portion 1192 may support the first connection member 113a and the second connection member 113b at a lower side of them.
A rotating shaft 118a of the rear wheel 118 may be disposed at the rear relative to the center 124a of the hinge shaft 124. This may result in improving stability of the housing, thereby preventing the housing 110 from being overturned during cleaning.
Hereinafter, the detailed configuration of the driving unit
140 will be described.
FIG. 12 is a view illustrating a state in which a first side cover of a suction nozzle has been removed, FIG. 13 is an exploded perspective view of the driving unit, and FIG. 14 is a sectional view illustrating the driving unit cut along the rotating shaft of the rotary cleaning unit.
Referring to FIGS. 12 to 14, the driving unit 140 for _0 rotating the rotary cleaning unit 130 is coupled to the body portion 111 of the housing 110. At least part of the driving unit may be inserted into one side of the rotary cleaning unit 130 .
The driving unit 140 includes a motor 143 for generating a 25 driving force and a motor supporter 141. The motor 143 may include a BLDG motor. A printed circuit board (PCB) 1432 for controlling the motor 143 may be provided on one side of the motor 143.
The motor 143 may be coupled to the motor supporter 141 by coupling members such as bolts. The motor 143 may be provided with coupling holes 1434 for coupling with the motor supporter
141 using the bolts.
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 23 The driving unit 140 may further include a gear portion 145 for transmitting the driving force of the motor 143.
The motor 143 may be inserted into the gear portion 145.
For this purpose, a hollow may be formed inside the gear portion 5 145. The gear portion 145 may be coupled to the motor supporter
141 by bolts. For this purpose, coupling holes 1454 may be formed in one side of the gear portion 145. The gear portion 145 and the motor 143 may be integrally coupled to the motor supporter 141 so as to reduce generation of vibration during an 0 operation of the motor 143.
The motor supporter 141 may be made of polycarbonate. The polycarbonate material is characterized in view of high insulation and impact resistance. Therefore, the motor supporter 141 can be strong against external impact and prevent externally-generated static electricity and the like from being transferred to the motor 143.
Also, an inner circumferential surface of the motor supporter 141 is spaced apart from the PCB 1432 of the motor 143. Accordingly, even when static electricity generated in the _0 body portion 111 is transmitted to the driving unit 140, the static electricity can be naturally discharged without reaching up to the PCB 1432 of the motor 143, which may result in protecting the PCB 1432 of the motor 143.
The motor supporter 141 is spaced apart from an inner circumferential surface of the first side cover 115.
Accordingly, a cooling flow path for cooling the driving unit
140 can be secured.
The driving unit 140 may further include a cover portion
147 enclosing the gear portion 145. The cover portion 147 has a 30 function of protecting the gear portion 145.
The driving unit 140 further includes a shaft 148 connected to the gear portion 145 and the shaft 148 is connected to the
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 24 rotary cleaning unit 130. The shaft 148 may transfer the driving force transmitted through the gear portion 145 to the rotary cleaning unit 130. Accordingly, the rotary cleaning unit 130 can rotate .
The driving unit 140 may further include a bearing 149 mounted on the cover portion 147. The bearing 149 may be connected to the shaft 148 to fix the shaft 148 at a predetermined position and may rotate the shaft 148 while supporting a weight of the shaft 148 itself and a load applied to the shaft 148. Accordingly, the shaft 148 can rotate smoothly .
The shaft 148 includes a fixing member 1482 fixed to the rotary cleaning unit 130. Accordingly, the shaft 148 can rotate together with the rotary cleaning unit 130 in the fixed state.
Therefore, the shaft 148 can rotate the rotary cleaning unit 130 by using the driving force transmitted by the motor 143 and the gear portion 145.
Hereinafter, the configuration of the rotary cleaning unit
130 that can prevent static electricity from being transmitted _0 to the user will be described.
FIG. 15 is a conceptual view illustrating an example of the rotary cleaning unit 130.
The rotary cleaning unit 130 includes a nozzle body 131, a fiber layer 134, fiber filaments 132, and metal filaments 133.
The nozzle body 131 has a hollow cylindrical shape. The hollow of the nozzle body 131 is formed along a direction of the rotating shaft of the rotary cleaning unit 130.
The nozzle body 131 is rotatably installed inside the housing 110 (see FIG. 2, etc.). The nozzle body 131 is provided with at least one protrusion 131a, 131b on an inner circumferential surface thereof. The protrusion 131a, 131b of the nozzle body 131 is engaged with the driving unit 140 (see
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 25 2020201882 16 Mar 2020
FIG. 13) when the rotary cleaning unit 130 is installed inside the housing. Accordingly, the nozzle body 131 may receive a rotational driving force from the driving unit 140.
The nozzle body 131 may be formed of a metal (extruded material) or plastic material (injected material), but the material of the nozzle body 131 is not particularly limited in the present disclosure. The metal may be extruded into the shape of the nozzle body. Extrusion refers to a molding method of producing a product with a predetermined sectional area by injecting a raw material and pressing it in one direction. On the other hand, the plastic may be injected into the shape of the nozzle body 131. Injection refers to a molding method of producing a product according to a shape of a mold by injecting a raw material into one of an upper mold and a lower mold and pressing it using the other.
Since the nozzle body 131 rotates at a high speed, minimum durability must be ensured. A minimum thickness of the nozzle body 131 for ensuring the minimum durability may vary depending on a material. Here, the thickness of the nozzle body 131 refers _0 to a difference between an outer radius and an inner radius of the nozzle body.
Intensity of the plastic is weaker than that of the metal. Therefore, a minimum thickness of the plastic for ensuring the minimum durability should be greater than a minimum thickness of 25 the metal. When the minimum thickness of the nozzle body 131 is great, the weight of the nozzle body 131 becomes relatively heavy and accordingly a load applied to the motor 143 (see FIG. 12) for rotating the nozzle body 131 also increases. Also, the increased thickness of the nozzle body 131 causes an increase in 30 material costs.
In this respect, the nozzle body 131 is preferably formed of a metal material rather than a plastic material.
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 26 Particularly, since the aluminum-extruded product is light in weight and has sufficient intensity among metals, it is suitable as the material of the nozzle body 131.
The fiber layer 134 is formed to surround the outer circumferential surface of the nozzle body 131. In this case, depending on design, the rotary cleaning unit 130 may not be provided with the fiber layer 134, and in this case, the fiber filaments 132 and the metal filaments 133 may be coupled directly to the outer circumferential surface of the nozzle body 0 131.
The fiber filaments 132 and the metal filaments 133 are disposed on the outer circumferential surface of the nozzle body 131. The metal filament 133 is an organic conductive fiber. The fiber filaments 132 and the metal filaments 133 may be coupled to the nozzle body 131 or to the fiber layer 134. FIG. 15 illustrates a configuration in which the fiber filaments 132 and the metal filaments 133 are planted on the fiber layer 134.
The fiber filaments 132 and the metal filaments 133 planted on the fiber layer 134 may be randomly arranged. The fiber _0 filaments 132 may be fully planted without any distinction or unity, and the metal filaments 133 may be sparsely planted between the fiber filaments 132. A number ratio or area ratio between the fiber filaments 132 and the metal filaments 133 will be described later.
The fiber filaments 132 and the metal filaments 133 extend in a direction away from the center of the nozzle body 131. When the nozzle body 131 is rotated by the rotational driving force transmitted from the driving unit, the fiber filaments 132 and the metal filaments 133 rotate together with the nozzle body
131. The fiber filaments 132 and the metal filament 133 collide with a floor or a carpet such that debris, dust, etc. existing on the floor or the carpet can be swept out.
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 27 When the rotary cleaning unit 130 rotates, the fiber filaments 132 and the floor (or the carpet) to be cleaned collide with each other, and static electricity due to friction is generated during the collision. If only the fiber filaments
132 are provided on the outer circumferential surface of the rotary cleaning unit 130 without the metal filaments 133, static electricity is transferred even to the handle 13 (see FIG. 1) or the user along the cleaner body 10 (see FIG. 1) or a wire in the cleaner body 10.
However, when the metal filaments 133 are provided on the rotary cleaning unit 130 as illustrated in the present disclosure, the metal filaments 133 having conductivity may allow the static electricity generated by the fiber filaments 132 to be discharged or eliminated therethrough. Since the metal filaments 133 serve as a charging path connected to the floor or carpet or serve to remove static electricity, the static electricity can be prevented from being transmitted to the user. It has been checked that an electrostatic capacity is about 8 kV when the rotary cleaning unit is provided only with the fiber _0 filaments 132 without the metal filaments 133 but is reduced down to 1.6 kV when the rotary cleaning unit 130 is provided with both of the fiber filaments 132 and the metal filaments 133.
The fiber filament 132 may be formed of nylon. The metal 25 filament 133 may include a fiber filament 133a (see FIG. 16) such as nylon and a conductive coating layer 133b (see FIG. 16). The fiber filament 133a included in the metal filament 133 may be made of the same material as or a different material from the material of the fiber filament 132 planted on the nozzle body
131 or the fiber layer 134. The metal filament 133 will be described in more detail with reference to FIG. 16.
FIG. 16 is a conceptual view illustrating a process of
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 28 fabricating the rotary cleaning unit 130.
In order to fabricate the rotary cleaning unit 130, the metal filaments 133 must first be fabricated. These fabricated metal filaments 133 should be planted on the nozzle body 131 or the fiber layer 134 together with the fiber filaments 132.
Referring to FIG. 16, in order to fabricate the metal filament 133, a very long fiber filament 133a is first prepared. The fiber filament 133a may be formed of nylon.
Subsequently, a conductive material is coated on an outer circumferential surface of the fiber filament 133a to form the conductive coating layer 133b. The conductive coating layer 133b may be formed of brass or digenite (Cu9S5).
An average thickness of the conductive coating layer 133b is preferably 0.3 to 1.0 jL/m. An average thickness A of the conductive coating layer 133b refers to the remainder excluding a radius of the fiber filament 133a from a radius of the metal filament 133. If the average thickness of the conductive coating layer 133b is thinner than 0.3 jL/m, it is difficult to sufficiently prevent static electricity. This is because sufficient conductivity is not provided to the metal filament
133. On the contrary, if the average thickness of the conductive coating layer 133b exceeds 1.0 jL/m, friction against the floor or the carpet to be cleaned is excessively increased, making it difficult to smoothly perform cleaning.
Next, the fiber filament 133a having the conductive coating layer 133b is cut to have a length suitable to be planted. Several (a bundle) of the cut strands (threads, i.e., the cut fiber filaments) are twisted together to completely form one metal filament 133.
f inally, the metal filament 133 is planted on the fiber
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 29 2020201882 16 Mar 2020 layer 134 together with the fiber filament 132. The fiber filament 132 planted together with the metal filament 133 is formed by twisting a bundle of threads. The fiber layer 134 is formed with a plurality of planting portions 135a, 135b in which 5 the fiber filaments 132 and the metal filaments 133 are planted.
The planting portions 135a, 135b are disposed with being spaced apart from one another. Each planting portion 135a, 135b is provided with a hole 135a and a bridge 135b crossing the hole 135a.
The hole 135a of the planting portion 135a, 135b is divided into two by the bridge 135b. When the fiber filaments 132 and the metal filaments 133 to be planted on one planting portion 135a, 135b are inserted into one side hole to pass through another side hole, a center of the fiber filament 132 and a center of the fiber filament 133 are placed at a position where they meet the bridge 135b. Both ends of each of the fiber filament 132 and the metal filament 133 extend away from the center of the nozzle body 131.
The fiber filament 132 and the metal filament 133 are _0 supported by a supporting portion 136. The supporting portion
136 is formed between the nozzle body 131 and the fiber layer
134. The fiber layer 134 is formed so as to surround the nozzle body 131 and the supporting portion 136 is formed by curing an adhesive between the nozzle body 131 and the fiber layer 134.
The center of the fiber filament 132 and the center of the metal filament 133 may be fixed to the bridge 135b by the supporting portion 136.
The supporting portion 136 may decide the arrangement of the fiber filaments 132 and the metal filaments 133. For example, the supporting portion 136 may extend along a lengthwise direction of the nozzle body 131, extend along the circumferential direction of the nozzle body 131, or extend
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 30 along a spiral direction of the nozzle body 131. Accordingly, the fiber filaments 132 and the metal filaments 133 may be arranged to extend along the lengthwise, circumferential, or spiral direction of the nozzle body 131.
When an object charged with positive (+) or negative (-) polarity is approaching, the metal filament 133 generates opposite electric charge of negative or positive polarity and instantaneously neutralizes static electricity by corona discharge. The metal filament 133 has an effect of eliminating the static electricity by the corona discharge.
Furthermore, since the metal filament 133 includes the conductive coating layer 133b formed of digenite, the metal filament 133 has an antibacterial and deodorizing performance provided by the digenite. For example, the metal filament 133 has antibacterial effects against staphylococcus aureus, klebsiella pneumonia, E. coli, pseudomonas aeruginosa, and the like .
Also, the metal filament 133 has a heat storage performance and an electromagnetic wave absorption performance provided by _0 the digenite. The heat storage performance refers to absorbing sunlight or near-infrared rays and converting them into thermal energy. The electromagnetic wave absorption performance refers to absorbing electromagnetic waves emitted from a mobile terminal or the like and converting them into thermal energy.
The average thickness of the metal filament 133 is preferably in the range of 220 to 260 dTex (deci-Tex or dexiTex). If the average thickness of the metal filament 133 is thinner than 220 dTex, the metal filaments 133 are sparsely disposed on the outer circumferential surface of the fiber layer
134, which may cause a degradation of the cleaning performance.
Further, sealing may not be sufficiently performed, and thereby dust may be tangled between the metal filaments 133. On the
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 31 contrary, when the average thickness of the metal filament 133 exceeds 260 dTex, the metal filament 133 is closely adhered on the body portion 111 (see FIG. 2) of the suction nozzle and thereby a load of the suction motor is excessively increased.
Also, friction against the floor or carpet to be cleaned is excessively increased, making it difficult to smoothly perform the cleaning.
It is preferable that the number ratio of the metal filaments 133 to the sum of the fiber filaments 132 and the metal filaments 133 is 2.5% or more. For example, if the sum of the number of the fiber filaments 132 and the metal filaments 133 is 200, the number of the metal filaments 133 is preferably 5 or more. If the number ratio of the metal filaments 133 is 2.5% or less, the function of preventing the static electricity transmission or removing the static electricity cannot be sufficiently achieved. On the other hand, when the number ratio of the metal filaments 133 increases, the effect of preventing the static electricity transmission or removing the static electricity rises but the rise is not great. Also, when the _0 number ratio of the metal filaments 133 reaches 25%, the effect of preventing the static electricity transmission or removing the static electricity is saturated.
Both the fiber filament 132 and the metal filament 133 have a certain thickness. Therefore, although the planting portions
134a, 135b are spaced apart from one another, the fiber filaments 132 and the metal filaments 133 planted on the planting portions 135a, 135b cover the outer circumferential surface of the nozzle body 131. Since the fiber filaments 132 and the metal filaments 133 cover the outer circumferential surface of the nozzle body 131, the number ratio of the metal filaments 133 almost coincides with an area ratio. Accordingly, it is preferable that the area ratio occupied by the metal
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 32 filaments 133 on the outer circumferential surface of the nozzle body 131 is 2.5% or more. The technical significance of a lower limit or the saturation of the effect of preventing the static electricity transmission or removing the static electricity is replaced by that aforementioned in relation to the number ratio.
Electric resistance of one strand (thread) of the metal filament 133 is preferably 100 kQ or less. The fact that the electric resistance of the metal filament 133 is not infinite refers to that the metal filament 133 has conductivity. However, 0 if the electric resistance of one strand 133 of the metal filament 133 exceeds 100 kQ, the effect of preventing the static electricity transmission or removing the static electricity is deteriorated.
A surface resistance value of the rotary cleaning unit 130 including the metal filaments 133 is preferably in the range of x 102 to 1 x 103 Ω / 10 cm. Also, a specific resistance value of the metal filament 133 is preferably in the range of 1 χ 10-1 to 1 x 10-2 Ω / 10 cm. The meaning of the surface resistance value and the meaning of the specific resistance value are _0 replaced with the description of the meaning of the electric resistance of the single metal filament 133.
Tensile strength of the single metal filament 133 is preferably 3.5 cN / dTex (centi Newton / deci-Tex) or more. The tensile strength is a numerical value showing mechanical durability and reliability of the metal filament 133.
A tensile elongation of the single metal filament 133 is preferably 33 to 45%. When the rotary cleaning unit 130 rotate, the metal filaments 133 are tangled with the carpet to be cleaned. Therefore, the metal filament 133 must have a tensile 30 elongation value of 33% or more so as to perform the cleaning while tangling with the carpet to be cleaned. However, if the tensile elongation of the metal filament 133 exceeds 45%, only
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 33 2020201882 16 Mar 2020 some of the metal filaments 133 may excessively extend in length on the rotary cleaning unit 130 to be likely to form a nonuniform outer circumferential surface, which may cause deterioration of the cleaning performance.
A specific gravity of the metal filament 133 may be 1.05 to
1.20 g / cm3, and a process moisture regain may be 4.5% or less. These conditions are to ensure an optimal effect of preventing the static electricity transmission or removing the static electricity and an optimal cleaning performance.
Hereinafter, various examples of the rotary cleaning unit
130 will be described.
FIG. 17 is a conceptual view illustrating another example of a rotary cleaning unit 230.
The rotary cleaning unit 230 includes a strap portion 237 and an antistatic portion 238. The strap portion 237 and the antistatic portion 238 are distinguished according to which one of the fiber filament 132 (see FIG. 16) and the metal filament 133 (see FIG. 16) is planted thereon.
The strap portion 237 is provided with the fiber filament _0 132. The metal filament 133 is not planted on the strap portion
237 .
The antistatic portion 238 is provided with the fiber filament 132 and the metal filament 133. In the number ratio and the area ratio of the metal filaments 133 described above, each 25 denominator is the sum of the strap portion 237 and the antistatic portion 238.
Referring to FIG. 17, the strap portion 237 extends along the lengthwise direction of the nozzle body 231. The plurality of strap portions 237 are spaced apart from each other. An antistatic portion 238 is disposed between the strap portions 237. Each of the antistatic portions 238 extends along the lengthwise direction of the nozzle body 231, like the strap
C:WlnterwovenWNRPortblWDCCWDERW19982450J.docx-3/16/2020
2020201882 16 Mar 2020
- 34 portion 237. The antistatic portions 238 are spaced apart from each other.
Intervals between the strap portions 237 are equal to each other. Also, intervals between the antistatic portions 238 are equal to each other. Intervals between the strap portions 237 and the antistatic portions 238 may be the same as or different from each other. The strap portion 237 and the antistatic portion 238 may further include a dye coating layer.
In FIG. 17, unexplained reference numerals 231a and 231b denote protrusions, and 234 denotes a fiber layer.
FIG. 18 is a conceptual view illustrating another example of a rotary cleaning unit 330.
A strap portion 337 extends along a circumferential direction of the nozzle body 331. The plurality of strap portions 337 are spaced apart from each other. Antistatic portions 338 are disposed between the strap portions 337. Each antistatic portion 338 also extends along the circumferential direction of the nozzle body 331, like the strap portion 337. The antistatic portions 338 are spaced apart from each other.
_0 Widths of the strap portions 337 and intervals therebetween are equal to each other. Also, widths of the antistatic portions 338 and intervals therebetween are equal to each other. Widths of the strap portions 337 and the antistatic portions 338 and intervals between the strap portions 337 and the antistatic portions 338 may be the same as or different from each other.
The strap portion 337 and the antistatic portion 338 may further include a dye coating layer.
In FIG. 18, unexplained reference numerals 331a and 331b denote protrusions, and 334 denotes a fiber layer.
FIG. 19 is a conceptual view illustrating another example of a rotary cleaning unit 430.
A strap portion 437 extends along a spiral direction of the
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 35 nozzle body 431. The plurality of strap portions 437 are spaced apart from each other. Antistatic portions 438 are disposed between the strap portions 437. Each antistatic portion 438 also extends along the spiral direction of the nozzle body 431, like the strap portion 437. The antistatic portions 438 are spaced apart from each other.
The strap portion 437 and the antistatic portion 438 extend along the spiral direction. Accordingly, when viewing the rotary cleaning unit 430 from the front, the strap portions 437 are 0 formed in an inclined shape and the antistatic portions 438 are arranged in an inclined state between the strap portions 437.
Widths of the strap portions 437 and intervals therebetween are equal to each other. Also, widths of the antistatic portions 438 and intervals therebetween are equal to each other. Widths of the strap portions 437 and the antistatic portions 438 and intervals between the strap portions 437 and the antistatic portions 438 may be the same as or different from each other.
The strap portion 437 and the antistatic portion 438 may further include a dye coating layer.
_0 In FIG. 19, unexplained reference numerals 431a and 431b denote protrusions, and 434 denotes a fiber layer.
Hereinafter, another example of a suction nozzle 510 will be described.
FIG. 20 is a sectional view illustrating another example of 25 a suction nozzle 510, and FIG. 21 is an enlarged sectional view of a portion A of FIG. 20.
The structure that a driving unit 540 is provided with a brushless DC (BLDC) motor and disposed at one side of a rotary cleaning unit 530 has been described above. However, the driving 30 unit 540 may be provided with a DC motor 543 instead of the BLDC motor. In particular, DC motor 543 has an advantage in that it is less expensive than the BLDC motor.
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
- 36 2020201882 16 Mar 2020
If the DC motor 543 is large in size, it may be spatially insufficient to install the DC motor 543 in one side of the rotary cleaning unit 530. In this case, the DC motor 543, as illustrated in FIG. 20, may be installed inside (in a hollow of) a nozzle body 531. A driving force generated by the DC motor 543 may be transmitted to the nozzle body 531 through a shaft 548, a gear 545, and the like.
A cover portion 547 may be formed to enclose the DC motor
543 and the gear 545. The cover portion 547 is coupled to a circumference of the DC motor 543 and supports the DC motor 543.
A motor housing 542 is formed to enclose the DC motor 543, the gear 545, the cover portion 547, the shaft 548, and the like. The DC motor 543, the gear 545, the cover portion 547, the shaft 548, and the like are accommodated inside the motor housing 542.
The nozzle body 531 is rotatably supported by support members 549a, 544, and 550. Here, the support members 549a, 544, and 550 are conception that includes every configuration of rotatably supporting the nozzle body 631 regardless of a shape _0 or arrangement thereof.
If the support members 549a, 544, 550 and the nozzle body
531 are formed of different materials, noise and scratches may be caused due to friction between the different materials. The suction nozzle 510 includes brackets 546a and 546b to suppress 25 the generation of the noise and scratches. Since the brackets
546a and 546b are rotated together with the nozzle body 531, it may also be understood that the rotary cleaning unit 530 includes the brackets 546a and 546b.
A bearing portion 549a, 544 and a rotation supporting portion 550 illustrated in FIG. 20 rotatably support the nozzle body 531, so as to be included in the concept of the support members 549a, 544, and 550, respectively. Hereinafter,
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 37 description will be sequentially given of a bracket 546a disposed between the bearing portion 549a, 544 and the nozzle body 531 and a bracket 546b disposed between the rotation supporting portion 550 and the nozzle body 531. The two brackets
546a and 546b may be referred to as a first bracket 546a and a second bracket 546b for distinction from each other.
The bearing portion 549a, 544 is disposed around the shaft
548 to rotate together with the shaft 548. The bearing portion 549a, 544 includes a bearing 549a and a bearing cover 544.
The bearing 549a is disposed around the shaft 548 to support the rotating shaft 548. The bearing 549a serves to fix the shaft 548 to a predetermined position, and rotate the shaft 548 while supporting the weight of the shaft 548 and the load of the shaft 548.
The bearing 549a may be installed at each position where the support of the shaft 548 is required. FIG. 20 illustrates three bearings 549a, 549b, and 549c disposed around the shaft 548 .
The bearing cover 544 protects the bearing 549a. The _0 bearing cover 544 is installed around the bearing 549a. However, the bearing cover 544 is not provided for each bearing 549a. For example, only some of the bearings 549a, 549b, and 549c may be provided with the bearing cover 544.
The bearing cover 544 is formed of a material different from that of the nozzle body 531. It has been described that the nozzle body 531 may be formed of an extrusion-molded metal material. The bearing cover 544, on the other hand, may be formed of an injection-molded plastic material.
The first bracket 546a is coupled to an end portion of the 30 nozzle body 531 to suppress the generation of noise and scratches due to friction between the end portion of the nozzle body 531 and the bearing 549a. The first bracket 546a is pressC:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 38 fitted into the end portion of the nozzle body 531 in the lengthwise direction of the nozzle body 531 (a horizontal direction or an extending direction of the shaft 548 in FIG. 20) or attached on the end portion of the nozzle body 531 by an adhesive.
The first bracket 546a is disposed between the nozzle body
531 and the bearing cover 544. This is because the first bracket 546a can suppress the generation of noise and scratches due to friction between the nozzle body 531 and the bearing cover 544.
The first bracket 546a is formed of an injection-molded plastic material. This is because the generation of noise and scratches due to friction between different materials can be suppressed when the first bracket 546a and the bearing cover 544 are made of the same material. However, the same material does not mean the completely same material.
As the first bracket 546a is coupled to the nozzle body 531, the first bracket 546a is in contact with the bearing portion 549a, 544. More specifically, the first bracket 546a comes into surface-contact with an outer circumferential surface _0 of the bearing cover 544. Therefore, the bearing cover 544 and the first bracket 546a are provided with a mutual contact surface SI, S2. The mutual contact surface SI, S2 refers to at least one of a surface SI (see FIG. 21) of the bearing cover 544 which is in contact with the first bracket 546a, and a surface 25 S2 (see FIG. 21) of the first bracket 546a which is in contact with the bearing cover 544.
Referring to FIG. 21, the mutual contact surface SI, S2 of the bearing cover 544 and the first bracket 546a are inclined with respect to the lengthwise direction of the nozzle body 531. 30 If the mutual contact surface SI, S2 between the bearing cover 544 and the first bracket 546a is parallel to the lengthwise direction of the nozzle body 531, positions of the bearing 549a
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 39 and the bearing cover 544 are not fixed during the rotation of the shaft 548. Accordingly, the shaft 548 is likely to move along the lengthwise direction of the nozzle body 531.
Therefore, in order to fix the positions of the bearing
549a and the bearing cover 544 during the rotation of the shaft
548, the mutual contact surface SI, S2 between the first bracket 546a and the bearing cover 544 is preferably inclined with respect to the lengthwise direction of the nozzle body 531.
From a three-dimensional viewpoint, the mutual contact surface SI, S2 may have a shape corresponding to a side surface of a circular truncated cone. In this case, a radius of the mutual contact surface SI, S2 may gradually increase from the center of the nozzle body 531 toward the outside along the lengthwise direction. As the radius of the mutual contact surface SI, S2 gradually increases, the mutual contact surface SI, S2 is inclined with respect to the lengthwise direction of the nozzle body 531.
The brackets 546a and 546b may be coupled to both sides of the nozzle body 531, respectively. Referring to FIG. 20, the _0 second bracket 546b coupled to the left side of the nozzle body
531 is formed so as to enclose the rotation supporting portion 550 .
The rotation supporting portion 550 is coupled to a side cover 516 of the suction nozzle 510. The rotation supporting portion 550 is inserted into one end portion of the nozzle body 531 so as to rotatably support the nozzle body 531.
The second bracket 546b is physically connected to the shaft 548 that transmits the driving force of the DC motor 543. For example, the second bracket 546b may be provided with a polygonal groove (not shown) or a hole (not shown) corresponding to the shaft 548, and the shaft 548 may be inserted into the groove or hole.
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 40 The driving force of the DC motor 543 may be transmitted to the nozzle body 531 through the shaft 548, the gear 545, and the second bracket 546b. The rotation supporting portion 550 may be fixed to rotate relative to the nozzle body 531 or rotate together with the nozzle body 531. When the rotation supporting portion 550 rotates together with the nozzle body 531, the driving force of the DC motor 543 may be transmitted to the nozzle body 531 through the shaft 548, the gear 545, the second bracket 546b, and the rotation supporting portion 550.
The rotation supporting portion 550 may be formed of an injection-molded plastic material. Accordingly, when the rotation supporting portion 550 and the nozzle body 531 are in direct contact with each other, noise and scratches are caused due to friction between different materials. Since the second bracket 546b is disposed between the rotation supporting portion 550 and the nozzle body 531, the generation of the noise and scratches can be suppressed. This is because the second bracket 546b is formed of the same material as that of the rotation supporting portion 550. However, the same material does not mean _0 the completely same material.
The second bracket 546b includes a nozzle body coupling portion 546bl, an extending portion 546b2, and a shaft coupling portion 546b3.
The nozzle body coupling portion 546bl is formed in a circular shape so as to be coupled to the end portion of the nozzle body 531. The nozzle body coupling portion 546bl is formed in a shape of surrounding inner and outer circumferential surfaces of the nozzle body 531. The nozzle body 531 is sandwiched between a portion enclosed by the nozzle body 531 and 30 a portion enclosing the nozzle body 531.
The extending portion 546b2 extends from the nozzle body coupling portion 546bl to the inside of the nozzle body 531
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 41 along the inner circumferential surface of the nozzle body 531. The extending portion 546b2 may be in contact with the inner circumferential surface of the nozzle body 531.
The extending portion 546b2 may press the inner circumferential surface of the nozzle body 531 in a radial direction (a thickness direction from the inner circumferential surface to the outer circumferential surface). For example, if a distance between two opposing portions of the extending portion 546b2 (a distance including the thickness of the extending portion 546b2) is greater than an inner diameter of the nozzle body 531, the two portions of the extending portion 546b2 may press the inner circumferential surface of the nozzle body 531 in the radial direction. Since the extending portion 546b2 presses the inner circumferential surface of the nozzle body
531, the second bracket 546b can be prevented from being arbitrarily separated from the nozzle body 531.
The shaft coupling portion 546b3 extends from the extending portion 546b2 toward the shaft 548 to be coupled to the shaft 548. The shaft coupling portion 546b3 may be disposed between _0 the rotation supporting portion 550 and the driving unit 540. A polygonal groove or hole corresponding to the shaft 548 may be formed in the shaft coupling portion 546b3. The shaft 548 may be inserted with the groove or hole, and the driving force may be transmitted through the polygonal structure.
As described above, the nozzle body 531 is provided with protrusions 531a and 531b (see FIG. 22). The protrusions 531a and 531b protrude from the inner circumferential surface of the nozzle body 531 and extend along the lengthwise direction of the nozzle body 531.
If the second bracket 546b rotates relative to the nozzle body 531 by 360 degrees, the driving force may not be sufficiently transmitted to the nozzle body 531. For example,
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 42 the nozzle body 531 may run idle. This is because the driving force is transmitted to the nozzle body 531 through the second bracket 546b.
In order to prevent such a phenomenon, the extending portion 546b2 of the second bracket 546b and the protrusions
531a and 531b should be in contact with each other. Even if the second bracket 546b and the nozzle body 531 rotate relative to each other by a predetermined angle, the extending portion 546b2 presses the protrusions 531a and 531b in a rotating direction of 0 the nozzle body 531 and accordingly the driving force may eventually be transmitted. For this purpose, the protrusions 531a, 531b and the extending portion 546b2 must be located on the same plane. Here, the same plane refers to the inner circumferential surface of the nozzle body 531.
In FIGS. 20 and 21, unexplained reference numeral 515 denotes a side cover.
FIG. 22 is a conceptual view of the rotary cleaning unit
530 and the first bracket 546a coupled to the rotary cleaning unit 530.
_0 The nozzle body 531 of the rotary cleaning unit 530 is coupled to the first bracket 546a. The nozzle body 531 is rotatably supported by the bearing cover 544 as the first bracket 546a comes in surface-contact with the bearing cover 544 .
The first bracket 546a includes a nozzle body coupling portion 546al, an extending portion 546a2, and a surface-contact portion 546a3.
The nozzle body coupling portion 546al is formed in a circular shape so as to be coupled to the end portion of the 30 nozzle body 531. The nozzle body coupling portion 546al is formed to enclose the inner and outer circumferential surfaces of the nozzle body 531. The nozzle body 531 is sandwiched
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 43 between a portion enclosed by the nozzle body 531 and a portion enclosing the nozzle body 531.
The extending portion 546a2 extends from the nozzle body coupling portion 546al to the inside of the nozzle body 531 along the inner circumferential surface of the nozzle body 531. The extending portion 546a2 may be in contact with the inner circumferential surface of the nozzle body 531.
The extending portion 546a2 may be provided in plurality. For example, FIG. 22 exemplarily illustrates that the first bracket 546a is provided with four extending portions 546a2. Each extending portion 546a2 may press the inner circumferential surface of the nozzle body 531 in the radial direction (the thickness direction from the inner circumferential surface to the outer circumferential surface).
When a distance between the opposing extending portions
546a2 (a distance including the thickness of the extending portion 546a2) is greater than an inner diameter of the nozzle body 531, the two extending portions 546a2 may press the inner circumferential surface of the nozzle body 531 in the radial _0 direction. Since the two extending portions 546a2 press the inner circumferential surface of the nozzle body 531, the first bracket 546a can be prevented from arbitrarily separated from the nozzle body 531.
The structure in which the extending portions 546a2 are in contact with the protrusions 531a and 531b of the nozzle body
531 so as to press the protrusions 531a and 531b in the rotating direction may also be applied to the second bracket 546b.
The surface-contact portion 546a3 protrudes from the inner circumferential surface of the nozzle body coupling portion
54 6al. The surface-contact portion 546a3 is in surface-contact with the bearing portion 549a, 544 so as to support the rotation of the shaft 548 and the bearing portion 549a, 544. The mutual
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 44 contact surface SI, S2 (see FIG. 21) between the first bracket 546a and the bearing cover 544 have been described. The mutual contact surface S2 of the first bracket 546a corresponds to the surface-contact portion 546a3. Therefore, the description of the structure of the surface contact portion 546a3 that is formed to be inclined or extends toward the outside is replaced with the foregoing description.
The surface-contact portion 546a3 may be provided in plurality. For example, FIG. 22 exemplarily illustrates that the first bracket 546a is provided with four surface-contact portions 546a3. In this case, the surface-contact portions 546a3 may be spaced apart from one another. The mutual contact surface SI of the bearing cover 544 is a closed curve while the surfacecontact portion 546a3 is not a closed curve.
The extending portions 546a2 and the surface-contact portions 546a3 may be alternately arranged to evenly distribute a force applied to the surface-contact portion 546a3 in response to supporting the nozzle body 531 and a force required to prevent an arbitrary separation of the first bracket 546a from _0 the nozzle body 531 to the first bracket 546a.
In FIG. 22, unexplained reference numeral 534 denotes a fiber layer, 537 denotes a strap portion, and 538 denotes an antistatic portion.
The vacuum cleaner described above is not limited to the configurations and the methods of the embodiments described above, but the embodiments may be configured by selectively combining all or part of the embodiments so that various modifications or changes can be made.
The present disclosure can be applied to industries related 30 to a vacuum cleaner.
Throughout this specification and the claims which follow, unless the context requires otherwise, the word comprise, and
C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
2020201882 16 Mar 2020
- 45 variations such as comprises and comprising, will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.

Claims (1)

  1. [Claim 1]
    A vacuum cleaner, comprising:
    a cleaner body; and
    5 a suction nozzle connected to the cleaner body, wherein the suction nozzle comprises:
    a housing defining an opening at a front portion of the housing, and a rotary cleaning unit located inside of the housing and
    0 configured to rotate relative to the housing, at least a portion of the rotary cleaning unit being exposed through the opening of the housing, wherein the rotary cleaning unit comprises:
    a nozzle body rotatably coupled to an inside of the
    5 housing, the nozzle body having a cylindrical shape;
    a strap portion that includes a plurality of fiber filaments; and an antistatic portion that includes both of a plurality of fiber filaments and a plurality of metal filaments, and
    20 wherein the strap portion and the antistatic portion are alternately disposed along an outer circumferential surface of the nozzle body and extend in at least one of a lengthwise direction of the nozzle body, a circumferential direction of the nozzle body and a spiral direction of the nozzle body.
    25 [Claim 2]
    The vacuum cleaner of claim 1, wherein each metal filament comprises :
    a fiber filament; and a conductive coating layer disposed on an outer
    30 circumferential surface of the fiber filament.
    [Claim 3]
    C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
    - 47 2020201882 16 Mar 2020
    The vacuum cleaner of claim 2, wherein the conductive coating layer comprises brass or digenite (Cu9S5).
    [Claim 4]
    The vacuum cleaner of claim 2, wherein an average thickness
    5 of the conductive coating layer is from 0.3 to 1.0 jL/m.
    [Claim 51
    The vacuum cleaner of claim 1, wherein an average thickness of the plurality of metal filaments is from 220 to 260 deci-Tex (dTex) .
    0 [Claim 6]
    The vacuum cleaner of claim 1, wherein a ratio of a number of the plurality of metal filaments to a total number of the plurality of fiber filaments and the plurality of metal filaments is greater than or equal to 2.5%.
    5 [Claim 7]
    The vacuum cleaner of claim 1, wherein a ratio of an area of the plurality of metal filaments to a total area of the outer circumferential surface of the nozzle body is greater than or equal to 2.5%.
    20 [Claim 8]
    The vacuum cleaner of claim 1, wherein an electric resistance of a single metal filament of the plurality of metal filaments is less than or equal to 100 kQ.
    [Claim 9]
    25 The vacuum cleaner of claim 1, wherein a tensile strength of a single metal filament of the plurality of metal filaments is greater than or equal to 3.5 centi-Newton/deci-Tex (cN/dTex). [Claim 10]
    C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
    - 48 2020201882 16 Mar 2020
    The vacuum cleaner of claim 1, wherein a tensile elongation of a single metal filament of the plurality of metal filaments corresponds to 33 to 45% of a length of the single metal filament.
    5 [Claim 11]
    The vacuum cleaner of claim 1, wherein a surface resistance value of the rotary cleaning unit is from 1 χ 102 to 1 χ 103 Ω / 10 cm.
    [Claim 12]
    0 The vacuum cleaner of claim 1, wherein a specific resistance value of the plurality of metal filaments is 1x10-1 to 1 χ 10-2 Ω / 10cm.
    [Claim 13]
    The vacuum cleaner of claim 1, wherein the rotary cleaning 5 unit further comprises:
    a fiber layer that surrounds the outer circumferential surface of the nozzle body; and a supporting portion configured to support the plurality of fiber filaments and the plurality of metal filaments,
    20 wherein the fiber layer includes a plurality of planting portions that are spaced apart from each other, each planting portion being configured to receive a portion of the plurality of fiber filaments and a portion of the plurality of metal filaments,
    25 wherein each planting portion comprises a hole and a bridge that crosses the hole, wherein each fiber filament comprises a bundle of threads that twist around each other, and each metal filament comprises a bundle of threads that twist around each other,
    30 wherein a center of each fiber filament and a center of
    C:WlnterwovenWNRPortblWDCCWDERW19982450_1.docx-3/16/2020
    2020201882 16 Mar 2020
    - 49 each metal filament are coupled to the bridge, wherein an end of each fiber filament and an end of each metal filament extend outward from a center of the nozzle body, and
    5 wherein the supporting portion comprises an adhesive that is cured between the nozzle body and the fiber layer, the supporting portion extending at least one of in the lengthwise direction of the nozzle body, the circumferential direction of the nozzle body and the spiral direction of the nozzle body.
    0 [Claim 14]
    The vacuum cleaner of claim 1, wherein a plurality of strap portions are spaced apart from each other, and the antistatic portions are disposed between the strap portions.
    [Claim 15]
    5 The vacuum cleaner of claim 1, wherein the rotary cleaning unit further comprises a support member configured insert into at least one end portion of the nozzle body and configured to rotatably support the nozzle body, the support member comprising a material that
    20 is different from a material of the nozzle body, and a bracket configured to couple to the at least one end portion of the nozzle body and configured to contact the support member, wherein the nozzle body includes a protrusion that
    25 protrudes from an inner circumferential surface of the nozzle body, wherein the protrusion extends along the lengthwise direction of the nozzle body, and wherein the bracket is configured to contact the protrusion
    30 and to provide pressure to the protrusion in a rotation direction of the nozzle body.
AU2020201882A 2017-04-20 2020-03-16 Vacuum cleaner Abandoned AU2020201882A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2020201882A AU2020201882A1 (en) 2017-04-20 2020-03-16 Vacuum cleaner
AU2022200215A AU2022200215B2 (en) 2017-04-20 2022-01-14 Vacuum cleaner

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
KR10-2017-0051240 2017-04-20
KR20170051240 2017-04-20
KR10-2017-0096481 2017-07-28
KR1020170096481A KR102312151B1 (en) 2017-04-20 2017-07-28 Vacuum cleaner
PCT/KR2018/004582 WO2018194407A1 (en) 2017-04-20 2018-04-19 Vacuum cleaner
AU2018256172A AU2018256172A1 (en) 2017-04-20 2018-04-19 Vacuum cleaner
AU2020201882A AU2020201882A1 (en) 2017-04-20 2020-03-16 Vacuum cleaner

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
AU2018256172A Division AU2018256172A1 (en) 2017-04-20 2018-04-19 Vacuum cleaner

Related Child Applications (1)

Application Number Title Priority Date Filing Date
AU2022200215A Division AU2022200215B2 (en) 2017-04-20 2022-01-14 Vacuum cleaner

Publications (1)

Publication Number Publication Date
AU2020201882A1 true AU2020201882A1 (en) 2020-04-02

Family

ID=64100947

Family Applications (3)

Application Number Title Priority Date Filing Date
AU2018256172A Abandoned AU2018256172A1 (en) 2017-04-20 2018-04-19 Vacuum cleaner
AU2020201882A Abandoned AU2020201882A1 (en) 2017-04-20 2020-03-16 Vacuum cleaner
AU2022200215A Active AU2022200215B2 (en) 2017-04-20 2022-01-14 Vacuum cleaner

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AU2018256172A Abandoned AU2018256172A1 (en) 2017-04-20 2018-04-19 Vacuum cleaner

Family Applications After (1)

Application Number Title Priority Date Filing Date
AU2022200215A Active AU2022200215B2 (en) 2017-04-20 2022-01-14 Vacuum cleaner

Country Status (6)

Country Link
JP (1) JP6845924B2 (en)
KR (4) KR102312151B1 (en)
CN (1) CN209826554U (en)
AU (3) AU2018256172A1 (en)
DE (1) DE112018000186T5 (en)
TW (1) TWI685323B (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102312151B1 (en) * 2017-04-20 2021-10-14 엘지전자 주식회사 Vacuum cleaner
US10925454B2 (en) 2017-04-20 2021-02-23 Lg Electronics Inc. Vacuum cleaner
CN116211198A (en) 2018-04-30 2023-06-06 Lg电子株式会社 Suction nozzle of cleaner
KR20190125912A (en) 2018-04-30 2019-11-07 엘지전자 주식회사 Nozzle for cleaner
CN115989982A (en) * 2018-04-30 2023-04-21 Lg电子株式会社 Suction nozzle of cleaner
CN116269038A (en) 2018-04-30 2023-06-23 Lg电子株式会社 Suction nozzle of cleaner
WO2019212177A1 (en) 2018-04-30 2019-11-07 엘지전자 주식회사 Cleaner nozzle
KR102625905B1 (en) 2018-07-30 2024-01-18 엘지전자 주식회사 Nozzle for cleaner
JP2020110472A (en) * 2019-01-16 2020-07-27 日立グローバルライフソリューションズ株式会社 Vacuum cleaner
KR102246403B1 (en) 2019-12-03 2021-04-29 엘지전자 주식회사 Vacuum cleaner
KR20210069405A (en) 2019-12-03 2021-06-11 엘지전자 주식회사 Vacuum cleaner
KR102267510B1 (en) 2019-12-03 2021-06-18 엘지전자 주식회사 Vacuum cleaner
KR102267512B1 (en) 2019-12-03 2021-06-18 엘지전자 주식회사 Vacuum cleaner
KR20210069408A (en) 2019-12-03 2021-06-11 엘지전자 주식회사 Vacuum cleaner
KR20210090435A (en) 2020-01-10 2021-07-20 엘지전자 주식회사 Vacuum cleaner
KR20210148607A (en) * 2020-06-01 2021-12-08 삼성전자주식회사 Vacuum cleaner
EP3977893A1 (en) * 2020-10-01 2022-04-06 Koninklijke Philips N.V. Brush for use in a cleaning device for cleaning surfaces
KR20220074271A (en) * 2020-11-27 2022-06-03 삼성전자주식회사 cleaner
KR20230073646A (en) * 2021-11-19 2023-05-26 삼성전자주식회사 Cleaner head and cleaner including the same

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100384980B1 (en) * 1998-04-03 2003-06-02 마츠시타 덴끼 산교 가부시키가이샤 Rotational brush device and electric instrument using same
JP2000245662A (en) * 1999-03-02 2000-09-12 Matsushita Electric Ind Co Ltd Suction tool for vacuum cleaner, and vacuum cleaner
JP3594173B2 (en) * 1999-06-15 2004-11-24 東芝テック株式会社 Vacuum cleaner and its suction body
JP2002136457A (en) * 2000-10-31 2002-05-14 Matsushita Electric Ind Co Ltd Vacuum cleaner of exhaust circulation type
JP3080148U (en) * 2001-03-08 2001-09-14 一良 二村 Glasses fishing string with static electricity removal function
KR100550555B1 (en) * 2003-10-13 2006-02-10 엘지전자 주식회사 the Suction Apparatus of a Vacuum Cleaner
JP3839020B2 (en) * 2004-01-15 2006-11-01 シャープ株式会社 Vacuum cleaner brush assembly and rotating brush
JP2006204525A (en) * 2005-01-27 2006-08-10 Sanyo Electric Co Ltd Rotary brush for cleaner
JP2008194329A (en) * 2007-02-15 2008-08-28 Solotex Corp Rotating brush for vacuum cleaner
JP5263872B2 (en) * 2008-04-29 2013-08-14 株式会社コーワ Rotating rotor and vacuum cleaner suction tool
GB2470920A (en) 2009-06-09 2010-12-15 Dyson Technology Ltd Agitating menas for a cleaning head
GB2476810B (en) * 2010-01-08 2014-01-08 Dyson Technology Ltd Cleaner head for a vacuum cleaner
JP2013031550A (en) * 2011-08-02 2013-02-14 Toshiba Corp Rotary cleaning body, suction port body for vacuum cleaner, and vacuum cleaner
JP2013031551A (en) * 2011-08-02 2013-02-14 Toshiba Corp Vacuum cleaner and suction port body of the same
GB2498351B (en) * 2012-01-10 2014-06-18 Dyson Technology Ltd A cleaner head for a vacuum cleaner
KR101397486B1 (en) * 2012-07-27 2014-05-27 주식회사 디에이이에스산업 Cleaning towel using ultra-high tenacity yarn
GB201313707D0 (en) * 2013-07-31 2013-09-11 Dyson Technology Ltd Cleaner head for a vacuum cleaner
GB2524285B (en) * 2014-03-19 2016-12-07 Dyson Technology Ltd Cleaner head
KR102312151B1 (en) * 2017-04-20 2021-10-14 엘지전자 주식회사 Vacuum cleaner

Also Published As

Publication number Publication date
KR20180118026A (en) 2018-10-30
KR102312151B1 (en) 2021-10-14
KR20210030916A (en) 2021-03-18
AU2022200215A1 (en) 2022-02-10
KR20200058364A (en) 2020-05-27
JP2019528917A (en) 2019-10-17
DE112018000186T5 (en) 2019-09-19
JP6845924B2 (en) 2021-03-24
AU2022200215B2 (en) 2024-04-11
AU2018256172A1 (en) 2018-12-06
KR102118447B1 (en) 2020-06-26
TWI685323B (en) 2020-02-21
TW201838576A (en) 2018-11-01
KR102552402B1 (en) 2023-07-07
KR102227459B1 (en) 2021-03-15
KR20190080855A (en) 2019-07-08
CN209826554U (en) 2019-12-24

Similar Documents

Publication Publication Date Title
AU2022200215B2 (en) Vacuum cleaner
US11896194B2 (en) Vacuum cleaner
KR101903238B1 (en) Nozzle for cleaner
JP2019528917A5 (en)
US11540684B2 (en) Rolling brush assembly and dust collector with the same
AU2017389095B2 (en) Vacuum cleaner
CN107007212B (en) Cleaning device
KR20220098783A (en) vacuum cleaner head
AU2017380305B2 (en) Nozzle, for cleaner, and vacuum cleaner
KR102482580B1 (en) Nozzle and cleaner
US20220369877A1 (en) Vacuum cleaner
KR20160026435A (en) Electrostatic cleaner
KR102318287B1 (en) A vacuum cleaner
EP4070705B1 (en) Vacuum cleaner
US11517160B2 (en) Vacuum cleaner
JP2011005184A (en) Cleaning body
CN217659586U (en) Rolling brush and rolling brush assembly
KR20150130946A (en) Motor cleaner