TW201838576A - Vacuum cleaner - Google Patents

Abstract

A vacuum cleaner of the present disclosure includes 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, wherein the suction nozzle includes a housing having at least part of a front portion opened, and a rotary cleaning unit disposed inside the housing, having at least part thereof exposed through the opening of the housing, and configured to clean a floor by a rotating operation, wherein the rotary cleaning unit includes a cylindrical nozzle body rotatably installed inside the housing, and fiber filaments and metal filaments disposed on an outer circumferential surface of the nozzle body.

Description

 Vacuum cleaner  

The present invention relates to a structure capable of preventing static electricity generated in a vacuum cleaner from being transmitted to a user.

The vacuum cleaner refers to a device that sucks dust and air by suction generated by a suction motor installed inside the main body of the cleaner and separates the dust from the air for collection.

Such vacuum cleaners are classified into canister vacuum cleaners, upright vacuum cleaners, stick vacuum cleaners, hand-held vacuum cleaners, and cleaning robots. In the case of a canister vacuum cleaner, a suction nozzle for sucking dust is provided separately from the main body of the cleaner, and is connected to the main body of the cleaner through a connecting device. For an upright vacuum cleaner, the suction nozzle is rotatably coupled to the cleaner body. The stick cleaner and the hand-held vacuum cleaner are used in a state where the user grasps the main body of the cleaner by hand. However, the suction motor of the stick cleaner is placed close to the suction nozzle (lower center), while the suction motor of the hand-held vacuum cleaner is placed close to the grip (upper center). Thanks to the autonomous travel system, the cleaning robot can walk on its own to perform the cleaning itself.

A suction nozzle refers to a portion that comes into contact with the floor to directly suck dust and air. The suction force generated in the suction motor installed inside the cleaner body is transmitted to the suction nozzle, and the suction force is transmitted to suck dust and air into the suction nozzle.

The suction nozzle is provided with a rotary cleaning unit (or agitator). The rotary cleaning unit scrapes (or cleans) dust from the floor or carpet in a rotating manner, thereby improving the cleaning effect. The brush is attached to the rotating cleaning unit to cause it to rub against the floor or carpet.

When the brush causes friction with the floor, static electricity is naturally generated due to friction. In particular, when the brush rubs against the carpet, the frequency of generation of static electricity will further increase.

However, the problem is that the static electricity generated will be transmitted to the user along the vacuum cleaner body or wire. Especially in the case of using a stick cleaner or a hand-held vacuum cleaner, since the user holds the vacuum cleaner body, static electricity is directly transmitted to the user.

In the prior art document, a configuration for preventing generation or transfer of static electricity is disclosed in Korean Patent Publication No. 10-2012-0027357 (March 21, 2012). However, since the above patent only defines the properties of the filament as a sheet resistance, basically its application to the vacuum cleaner is limited.

An object of the present invention is to provide a vacuum cleaner having a structure capable of preventing static electricity generated by rotation of a rotary cleaning unit from being transmitted to a user.

Another object of the present invention is to provide a vacuum cleaner having a structure capable of preventing deterioration or overload of a cleaning effect of a suction motor due to an antistatic structure.

Another aspect of the present invention is to provide a vacuum cleaner having a configuration capable of improving the reliability of an antistatic structure.

A vacuum cleaner according to the present invention may include a rotary cleaning unit configured to sweep the floor through a rotating operation. The rotary cleaning unit may include a nozzle body that is rotatable, and a plurality of fiber filaments and a plurality of metal filaments disposed on an outer circumferential surface of the nozzle body.

The vacuum cleaner may include a cleaner body having a suction motor disposed inside thereof and a handle disposed outside thereof; and a suction nozzle connected to the cleaner body.

The suction nozzle can include a housing having at least a portion of a front surface thereof. The rotary sweep unit can be disposed within the housing and at least a portion thereof can be exposed through the front opening of the housing.

The nozzle body may be rotatably mounted inside the housing and have a cylindrical shape.

Each of the metal filaments may include a fiber filament; and a conductive coating applied to an outer circumferential surface of the fiber filament.

The conductive coating may be formed of brass or sillimanite (Cu ₉ S ₅ ).

The conductive coating may have an average thickness of 0.3 to 1.0 microns.

Each metal filament may have an average thickness of 220 to 260 deci-Tex (dTex).

The ratio of the number of the metal filaments to the sum of the fiber filaments and the metal filaments may be 2.5% or more.

The area ratio of the metal filament on the outer circumferential surface of the nozzle body may be 2.5% or more.

The resistance of a single metal filament may be 100 kΩ or less.

The tensile strength of a single metal filament may be 3.5 cN/dTex (centiNewtons/minutetex) or higher.

The tensile elongation of the single metal filaments may range from 33 to 45%.

The surface resistance value of the rotary cleaning unit may be 1 × 10 ² to 1 × 10 ³ Ω/10 cm.

The metal filaments may have a resistivity of from 1 × 10 ^-1 to 1 × 10 ^-2 Ω/10 cm.

Each of the fiber filaments and the metal filaments can be formed by twisting into a bundle of wires.

The rotary cleaning unit may further include a fiber layer disposed to surround the outer circumferential surface of the nozzle body. The fibrous layer may be provided with a plurality of planting portions spaced apart from each other such that the fibrous filaments and the metal filaments are planted therein. Each of the planting portions may be provided with a hole and a bridge member traversing the hole.

The center of the fiber filament and the center of the metal filament may be fixed to the bridge member, and both ends of the fiber filament and the metal filament may extend away from the center of the nozzle body.

The rotary cleaning unit may further include a support portion supporting the fiber filaments and the metal filaments. The support portion may be disposed between the nozzle body and the fibrous layer and formed by curing an adhesive.

The support portion may extend along the length, circumferential direction, or spiral direction of the nozzle body.

The rotary cleaning unit may include a strip portion provided with the fiber filaments; and an antistatic portion provided with both the fiber filaments and the metal filaments.

The strip portion and the antistatic portion may extend along the length, circumferential direction, or spiral direction of the nozzle body.

The strip portion and the antistatic portion may have the same width.

The nozzle body may be formed of an extruded metal material.

The metal material may include aluminum.

The suction nozzle may include: a support member inserted into at least one end of the nozzle body to rotatably support the nozzle body, and formed of a material different from a material of the nozzle body; a bracket An end coupled to the nozzle body to contact the surface of the support member.

The mutually contacting surface between the support member and the bracket may be inclined with respect to the longitudinal direction of the nozzle body.

The support member may include a bearing mounted around a shaft member extending along a length direction of the nozzle body, and a bearing cover disposed to surround the bearing and formed of a material different from the nozzle body, and The bracket may be disposed between the nozzle body and the bearing cap.

The bracket may include: a nozzle body coupling portion having a circular shape to be coupled with an end portion of the nozzle body; and an extending portion from the nozzle body coupling portion along an inner circumferential surface of the nozzle body Extending into the nozzle body; and a surface contact portion projecting from an inner circumferential surface of the nozzle body coupling portion to be in contact with the bearing cap surface.

The extension portion and the surface contact portion may be alternately arranged.

The support member may include a rotation supporting portion coupled to one side cover of the suction nozzle and inserted into one end of the nozzle body to rotatably support the nozzle body, and the bracket may be disposed at The nozzle body is between the rotating support portion.

The bracket may include: a nozzle body coupling portion having a circular shape to be coupled with an end portion of the nozzle body; and an extending portion from the nozzle body coupling portion along an inner circumferential surface of the nozzle body Extending into the nozzle body; and a shaft member connecting portion extending from the extension toward the shaft member for coupling to a shaft member that transmits a driving force generated from the driving unit to the nozzle body.

The nozzle body may be provided with a projection protruding from an inner circumferential surface of the nozzle body. The protrusion may extend along a length direction of the nozzle body, and the bracket may be in contact with the protrusion to press the protrusion in a rotation direction of the nozzle body.

1‧‧‧Vacuum cleaner

10‧‧‧ Vacuum cleaner body

12‧‧‧dust container

13‧‧‧handle

15‧‧‧Battery housing

17‧‧‧ Extension tube

100‧‧‧ suction nozzle

110‧‧‧shell

111‧‧‧ body part

111a‧‧‧ front opening

1112‧‧‧Inside

1112a‧‧‧Internal flow path

112‧‧‧ chamber

112a‧‧‧First area

112b‧‧‧Second area

113a‧‧‧First connecting member

113b‧‧‧Second connection member

114‧‧‧Hinged holes

115‧‧‧ side cover, first side cover

116‧‧‧ side cover, second side cover

117a‧‧‧ front wheel

117b‧‧‧ front wheel

118‧‧‧ Rear wheel

118a‧‧‧Rotary axis

119‧‧‧Support members

1192‧‧‧Extension

120‧‧‧Connecting tube

122‧‧‧Removable button

123‧‧‧Auxiliary hose

124‧‧‧Hinged shaft

124a‧‧‧Center of hinge shaft

130‧‧‧Rotary cleaning unit

131‧‧‧The main body of the nozzle

131a‧‧‧Protruding

131b‧‧‧Protruding

132‧‧‧Fiber filament

133‧‧‧Metal filament

133a‧‧‧Fiber filament

133b‧‧‧conductive coating

134‧‧‧Fiber layer

135a‧‧‧planting parts, holes

135b‧‧‧planting parts, bridge parts

136‧‧‧Support section

140‧‧‧Drive unit

141‧‧‧Motor support

143‧‧‧Motor

1432‧‧‧Printed circuit board

1434‧‧‧Coupled holes

145‧‧‧ Gear section

1454‧‧‧Coupled holes

147‧‧‧ Cover part

148‧‧‧ shaft parts

1482‧‧‧Fixed components

149‧‧‧ bearing

150‧‧‧Rotary support section

160‧‧‧Separate components

161‧‧‧First extension wall

161a‧‧‧first upper groove

161b‧‧‧First lower groove

163‧‧‧ Third extension wall

165‧‧‧Second extension wall

165a‧‧‧Second upper groove

165b‧‧‧second lower groove

230‧‧‧Rotary cleaning unit

231‧‧‧ nozzle body

231a‧‧‧Protruding

231b‧‧‧Protruding

234‧‧‧Fiber layer

237‧‧‧ strip section

238‧‧‧Antistatic part

330‧‧‧Rotary cleaning unit

331‧‧‧ nozzle body

331a‧‧‧Protruding

331b‧‧‧Protruding

334‧‧‧Fiber layer

Section 337‧‧‧

338‧‧‧Antistatic part

430‧‧‧Rotary cleaning unit

431‧‧‧Sucker body

431a‧‧‧Protruding

431b‧‧‧Protruding

434‧‧‧Fiber layer

437‧‧‧ strip section

438‧‧‧Antistatic part

510‧‧‧ suction nozzle

515‧‧‧ side cover

516‧‧‧ side cover

530‧‧‧Rotary cleaning unit

531‧‧‧ nozzle body

531a‧‧‧Protruding

531b‧‧‧Protruding

534‧‧‧Fiber layer

537‧‧‧ strip section

538‧‧‧Antistatic part

540‧‧‧ drive unit

542‧‧‧Motor housing

543‧‧‧DC motor

545‧‧‧ Gears

544‧‧‧Support members, bearing parts, bearing caps

546a‧‧‧ bracket, first bracket

546a1‧‧‧ nozzle body coupling part

546a2‧‧‧Extension

546a3‧‧‧Surface contact

546b‧‧‧ bracket, second bracket

546b1‧‧‧ nozzle body coupling part

546b2‧‧‧Extension

546b3‧‧‧ shaft coupling part

547‧‧‧ Cover part

548‧‧‧Axis parts, rotating shaft parts

549a‧‧‧Support members, bearing parts, bearings

549b‧‧‧ bearing

549c‧‧‧ bearing

550‧‧‧Support members, rotating support parts

A‧‧‧Width, average thickness

C‧‧‧ center axis

F1‧‧‧ lower flow path

F2‧‧‧upper flow path, first upper flow path

F3‧‧‧upper flow path, second upper flow path

S1‧‧‧Contacts

S2‧‧‧Contacts

1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention; FIG. 2 is a perspective view of the suction nozzle of FIG. 1, FIG. 3 is a plan view of the suction nozzle of FIG. 2, and FIG. Figure 5 is a front view of the suction nozzle of Figure 1; Figure 6 is a view illustrating a state in which the rotary cleaning unit is removed from the suction nozzle of Figure 5; Figure 7 is a view of Figure 1 FIG. 8 is an exploded perspective view of the suction nozzle of FIG. 1; FIG. 9 is an exploded perspective view of the housing; FIG. 10 is a suction nozzle taken along line I-I' of FIG. Figure 11 is a cross-sectional view taken along line II-II' of Figure 7; Figure 12 is a view illustrating a state in which the first side cover of the suction nozzle is removed; and Figure 13 is an exploded perspective view of the drive unit Figure 14 is a cross-sectional view illustrating a driving unit cut along a rotating shaft member of the rotary cleaning unit; Figure 15 is a conceptual view illustrating an example of a rotary cleaning unit; Figure 16 is a conceptual view illustrating a manufacturing process of the rotary cleaning unit; Is a conceptual diagram illustrating another embodiment of a rotary cleaning unit; FIG. 18 is a diagram illustrating another embodiment of a rotary cleaning unit Figure 19 is a conceptual view illustrating another embodiment of the rotary cleaning unit; Figure 20 is a cross-sectional view showing another embodiment of the suction nozzle; Figure 21 is an enlarged cross-sectional view of a portion A of Figure 20; A conceptual diagram of the rotating cleaning unit and the first bracket coupled to the rotary cleaning unit.

Hereinafter, the embodiments of the present invention will be described in detail by referring to the accompanying 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 numerals, and the description thereof will not be repeated. In describing the present invention, if a detailed description of a related known function or structure is considered unnecessary, such description is omitted, and it is also understood by those skilled in the art.

It should be understood that the terms first, second, A, B, (a), (b), etc. may be used herein to describe various elements of the embodiments of the invention. However, these terms are generally only used to distinguish one element from another, and the nature, order, or order of the elements is not limited by the term. It will be understood that when an element is referred to as "connected" or "coupled" to another element, the element can be connected to the other element or the intermediate element. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, there is no intermediate element.

1 is a perspective view of a vacuum cleaner in accordance with an embodiment of the present invention.

Referring to FIG. 1, a vacuum cleaner 1 according to an embodiment of the present invention includes a cleaner body 10 having a suction motor (not shown) for generating a suction force, and a suction nozzle 100 through which the suction is performed. The suction nozzle 100 sucks air containing dust; and an extension pipe 17 that connects the suction nozzle 100 and the cleaner body 10 to each other.

Although not shown in the drawings, the suction nozzle 100 can be directly connected to the cleaner body 10 without the extension tube 17.

The cleaner body 10 may include a dust collecting container 12 for storing dust separated from the air. Therefore, the dust sucked through the suction nozzle 100 can be stored in the dust collecting container 12 via the extension pipe 17.

The handle 13 gripped by the user may be disposed outside the cleaner body 10. The user can perform cleaning while grasping 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 housing 15 for accommodating the battery. The battery housing portion 15 may be disposed at a lower portion of the handle 13. A 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.

Figure 2 is a perspective view of the suction nozzle of Figure 1; Figure 3 is a plan view of the suction nozzle of Figure 2; Figure 4 is a side view of the suction nozzle of Figure 1; Figure 5 is a suction suction of Figure 1. Figure 6 is a view illustrating a state in which the rotary cleaning unit is detached from the suction nozzle of Figure 5; Figure 7 is a bottom view of the suction nozzle of Figure 1; Figure 8 is a suction of Figure 1. FIG. 9 is an exploded perspective view of the housing; FIG. 10 is a cross-sectional view of the suction nozzle taken along line II' of FIG. 7; and FIG. 11 is along II-II of FIG. 'Split view taken from the line.

Referring to FIGS. 2 to 11 , the suction nozzle 100 includes a housing 110 , a connecting tube 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 111a through which air containing dirt is sucked. The air taken in through the front opening 111a can be moved to the connecting pipe 120 via the chamber 112 by the suction force generated by the cleaner body 10.

The front opening 111a extends in the left-right direction of the housing 110. The front opening 111a may extend to the front of the housing 110 and the bottom of the housing 110. This will ensure that it has sufficient suction area to evenly sweep a portion of the floor adjacent to the wall surface.

The housing 110 may also include an inner tube 1112 that communicates with the front opening 111a. The suction generated in the cleaner body 10 may allow outside air to move into the internal flow path 1112a of the inner tube 1112 through the front opening 111a.

The housing 110 may further include a driving unit 140 for supplying a driving force for rotating the rotating 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 drive unit 140 will be described in detail with reference to FIG.

The rotary cleaning unit 130 can be housed in the chamber 112 of the body portion 111. At least a portion of the rotary cleaning unit 130 may be exposed to the outside through the front opening 111a. The rotary cleaning unit 130 can rub the floor while rotating the driving force transmitted by the driving unit 140, thereby shaking (sweeping, scraping) the dirt. In addition, the outer circumferential surface of the rotary cleaning unit 130 may be made of a fabric such as cotton, flannel, or felt material. Therefore, while the rotary cleaning unit 130 is rotated, foreign matter such as dust accumulated on the floor may adhere to the outer circumferential surface of the rotary cleaning unit 130, thereby being effectively removed.

The body portion 111 may cover at least a portion of the upper side of the rotary cleaning unit 130. The inner circumferential surface of the main body portion 111 may have a curved shape to correspond to the shape of the outer circumferential surface of the rotary cleaning unit 130. Therefore, the main body portion 111 can perform a function of preventing the foreign matter swept from the floor from moving upward when the rotary cleaning unit 130 is rotated.

The housing 110 may further include a side cover 115 and a side cover 116 that cover both sides of the chamber 112. The side cover 115 and the side cover 116 may be disposed on both side surfaces of the rotary cleaning unit 130.

The side cover 115 and the side cover 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 the other side of the rotary cleaning unit 130. The first side cover 115 may be fixedly coupled to the drive unit 140.

The suction nozzle 100 further includes a rotation support portion 150 disposed on the second side cover 116 to rotatably support the rotary cleaning unit 130. The rotation support portion 150 may be inserted into the other side of the rotary cleaning unit 130 to rotatably support the rotary cleaning unit 130.

Referring to the cross-sectional view of FIG. 10, the rotary cleaning unit 130 can be rotated in the counterclockwise direction. That is, the cleaning unit 130 is rotated to rotate foreign matter or foreign matter from the contact point with the floor toward the inner tube 1112. Therefore, the foreign matter swept away from the floor by the rotary cleaning unit 130 will move toward the inner tube 1112, and is sucked into the inner tube 1112 by suction. The cleaning efficiency can be improved by rotating the cleaning unit 130 to rotate backward with respect to the contact point of the floor.

The chamber 112 may be provided with a separating member 160. The partition member 160 may extend from the top to the bottom of the housing 110.

The partition member 160 may be disposed between the rotary cleaning unit 130 and the inner tube 1112. The partition member 160 may divide the chamber 112 of the housing 110 into a first region 112a provided with the rotary cleaning unit 130 and a second region 112b provided with the inner tube 1112. As shown in FIG. 10, the first region 112a may be disposed at the front of the chamber 112, and the second region 112b may be disposed at the rear of the chamber 112.

The partition member 160 may be provided with a first extension wall 161. The first extension wall 161 may extend such that at least a portion thereof is in contact with the rotary cleaning unit 130. Therefore, when the rotary cleaning unit 130 rotates, the first extension wall 161 may rub the rotation cleaning unit 130 to sweep away the foreign matter adhering to the rotary cleaning unit 130.

The first extension wall 161 may extend along a rotation axis of the rotary cleaning unit 130. That is, the contact point between the first extension wall 161 and the rotary cleaning unit 130 may be formed along the rotation axis of the rotary cleaning unit 130. Therefore, the first extension wall 161 can remove foreign matter adhering to the rotary cleaning unit 130 and at the same time prevent foreign matter on the floor from being introduced into the first region 112a of the chamber 112. When the foreign matter is prevented from entering the first region 112a of the chamber 112, the rotation of the cleaning unit 130 can prevent the foreign matter from being discharged to the front portion of the casing 110 through the front opening 111a.

In addition, the first extension wall 161 may prevent hair or yarn adhering to the rotary cleaning unit 130 from being introduced into the first region 112a of the chamber 112, thereby preventing such hair or yarn from being wound around the rotary cleaning unit 130. That is, the first extension wall 161 can perform an anti-wrap function.

The partition member 160 may be further provided with a second extension wall 165. Similar to the first extension wall 161, the second extension wall 165 may extend such that at least a portion thereof is in contact with the rotary cleaning unit 130. Therefore, when the rotary cleaning unit 130 rotates, the second extension wall 165 can frictionally rotate the cleaning unit 130 like the first extension wall 161, thereby sweeping away foreign matter adhering to the rotary cleaning unit 130. On the other hand, the second extension wall 165 has the same function as the first extension wall 161, and the function of sweeping the foreign matter adhered to the rotary cleaning unit 130 can be performed only through the first extension wall 161 without the second extension wall 165. Therefore, the second extension wall 165 may not be included in the structure of the housing 110.

The second extension wall 165 may be disposed higher than the first extension wall 161. Therefore, the second extension wall 165 has a function of being permeable to the first extension wall 161 to perform secondary separation of the foreign matter not removed from the rotary cleaning unit 130.

Hereinafter, the flow of air inside the housing 110 will be described.

A plurality of suction flow paths F1, F2, and F3 are formed in the main body portion 111 of the suction nozzle 100, which causes external air to flow into the inner tube of the main body portion 111.

The plurality of suction flow paths F1, F2, and F3 include a lower flow path F1 formed on the lower side of the rotary cleaning unit 130 and upper flow paths F2 and F3 formed on the upper side of the rotary cleaning unit 130.

The lower flow path F1 is formed in the lower side of the rotary cleaning unit 130. Specifically, the lower flow path F1 is connected to the internal flow path 1112a from the front side opening 111a via the lower side of the rotary cleaning unit 130 and the second area 112b.

The upper flow path F2 and the upper flow path F3 are formed in the upper side of the rotary cleaning unit 130. Specifically, the upper flow path F2 and the upper flow path F3 may be connected to the internal flow path 1112a via the upper side of the rotary cleaning unit 130 and the second area 112b in the first area 112a. Therefore, the upper flow path F2 and the upper flow path F3 may be connected to the lower flow path F1 in the second region 112b.

The upper flow path F2 and the upper flow path F3 include a first upper flow path F2 formed in one side of the housing 110 and a second upper flow path F3 formed in the other side of the housing 110. Specifically, the first upper flow path F2 is disposed adjacent to the first side cover 115, and the second upper flow path F3 is disposed adjacent to the second side cover 116.

In order to form the first upper flow path F2, the first lower groove 161a may be formed in the first extension wall 161, and the first upper groove 165a may be formed in the second extension wall 165.

The first lower groove 161a is formed by causing a portion of the inner circumferential surface of the first extension wall 161, that is, a surface of the first extension wall 161 that is in contact with the rotary cleaning unit 130, and a recess. In addition, the first lower groove 161a may extend in the circumferential direction of the rotary cleaning unit 130.

The first upper groove 165a is formed by recessing a portion of the inner circumferential surface of the second extension wall 165, that is, the surface of the second extension wall 165 that is in contact with the rotary cleaning unit 130. The first upper groove 165a may extend in the circumferential direction of the rotary cleaning unit 130.

The first lower groove 161a is connected to the first upper 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 extension 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 a portion of the driving unit 140 along the periphery of the driving unit 140. The drive unit 140 may be cooled by air flowing along the first upper flow path F2.

As shown, the first lower groove 161a and the first upper groove 165a may have the same width A in the left-right direction, but the present invention is not limited thereto. The width A of each of the first lower groove 161a and the first upper groove 165a in the left-right direction may have a predetermined value. When the width A in the left-right direction is small, the width of the first upper flow path F2 is narrowed. Therefore, it will be possible to reduce the flow rate of the air or to prevent the flow of the air, resulting in an insignificant cooling performance of the drive unit 140. On the other hand, when the width A in the left-right direction is large, the width of the first upper flow path F2 is increased, and thus the flow rate of air may increase. However, the anti-winding function of the hair or the like of the rotary cleaning unit 130 caused by the first extension wall 161 and the second extension wall 165 may be lowered. Therefore, the width A in the left and right direction should have an appropriate value and may be smaller than the length of the driving unit 140. For example, the width A of the first upper groove 165a in the left-right direction may be 5 to 10 mm, but is not limited thereto.

As shown in Fig. 11, the separation 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 be narrowed toward the inner side of the chamber 112. Specifically, the separation distance between the inner circumferential surface of the chamber 112 and the upper side of the rotary cleaning unit 130 is d1 on the front opening 111a side, d2 at the first upper groove 165a, and the first lower groove in the first upper groove 165a. At 161a, it is d3. The separation distance gradually decreases from d1 to d3 (d1>d2>d3). For example, d1 may be 3 mm, d2 may be 2.7 mm, and d3 may be 2 mm. With this feature, it is possible to reduce the flow rate of the air toward the front opening 111a on the upper side of the rotary cleaning unit 130, which can prevent the foreign matter 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. In order to form the second upper flow path F3, a second lower groove 161b is formed in the first extension wall 161, and a second upper groove 165b is formed in the second extension 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 extension wall 161, that is, a surface of the first extension wall 161 that is in contact with the rotary cleaning unit 130. The second lower recess 161b is substantially the same except that it is different from the first lower recess 161a at a position where the second lower recess 161b is formed.

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 extension wall 165, that is, a surface of the second extension wall 165 which is in contact with the rotary cleaning unit 130. 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 extension 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 support portion 150. Therefore, the second upper flow path F3 can be formed along the circumference of the rotation support portion 150, and the rotation support portion 150 can be cooled by the air flowing along the second upper flow path F3.

The second lower groove 161b and the second upper groove 165b may have the same width A in the left-right direction, but the invention is not limited thereto. The width A of the second lower groove 161b and the second upper groove 165b in the left-right direction is the same as the width A of the first lower groove 161a and the first upper groove 165a in the left-right direction.

As with the first upper flow path F2, the separation 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 decrease toward the inner side of the chamber 112. Therefore, a detailed description thereof will be omitted.

The partition member 160 may be further provided with a third extension wall 163 coupled to the first extension wall 161. The third extension wall 163 may be coupled to a rear surface of the first extension wall 161 to support the first extension wall 161. When the first lower groove 161a and the second lower groove 161b are formed in the first extension wall 161, the third extension wall 163 may be partially exposed at the first region 112a of the chamber 112.

Thus, the housing 110 not only has the lower flow path F1 disposed in the lower side of the rotary cleaning unit 130, but also has the first upper flow path F2 disposed in the upper side of the rotary cleaning unit 130, which can effectively cool the driving unit 140. The housing 110 is also provided with a second upper flow path F3, which can effectively cool the rotary support portion 150.

The connecting tube 120 can connect the housing 110 and the extension tube 17 (see Fig. 1). That is, one side of the connection pipe 120 is connected to the casing 110, and the other side of the connection pipe 120 is connected to the extension pipe 17.

The connecting tube 120 can be provided with a detachable button 122 that is used to manipulate the mechanical connection with the extension tube 17. The user can connect or disconnect the connecting tube 120 and the extension tube 17 by operating the detachable button 122.

The connecting tube 120 may be rotatably coupled to the housing 110. Specifically, the connecting pipe 120 may be hinged to the first connecting member 113a so as to be vertically rotatable.

The housing 110 may be provided with a connecting member 113a and a connecting member 113b for articulating with the connecting tube 120. The connecting member 113a and the connecting member 113b may be formed to surround the inner tube 1112. The connecting member 113a and the connecting member 113b may include a first connecting member 113a and a second connecting member 113b that are directly coupled to the connecting tube 120. One side of the second connection member 113b may be coupled to the first connection member 113a, and the other side of the second connection member 113b may be coupled to the body portion 111.

As shown in FIG. 8, a hinge hole 114 is formed in the first connecting member 113a, and a hinge shaft 124 inserted into the hinge hole 114 may be disposed on the connecting pipe 120. However, unlike the illustrated embodiment, the hinge hole 114 may be formed in the connecting tube 120, and the hinge shaft 124 may be formed on the first connecting member 113a. The hinge hole 114 and the hinge shaft 124 may be collectively referred to as a "hinge portion."

The center 124a of the hinge shaft 124 may be disposed higher than the central axis C of the first connecting member 113a. Therefore, the center of rotation of the connecting pipe 120 can be formed higher than the central axis C of the first connecting member 113a.

The first connection member 113a may be rotatably coupled to the second connection member 113b. Specifically, the first connecting member 113a is rotatable in the longitudinal direction as an axis of rotation.

The suction nozzle 100 may further include an auxiliary hose 123 that connects the connection pipe 120 and the inner tube 1112 of the housing 110 to each other. Therefore, the air introduced into the casing 110 can flow toward the cleaner body 10 along the auxiliary hose 123, the connecting pipe 120, and the extension pipe 17 (see Fig. 1) (see Fig. 1).

The auxiliary hose 123 may be made of a flexible material such that the connecting tube 120 can be rotated. In addition, the first connecting member 113a may have a shape surrounding at least a portion of the auxiliary hose 123 to protect the auxiliary hose 123.

The suction nozzle 100 may also include front wheels 117a and 17b for moving during cleaning. The front wheels 117a and 117b may be rotatably disposed on a bottom surface of the housing 110. The front wheels 117a and 117b may be disposed in a pair on both sides of the front opening 111a, and may be disposed at the rear of the front opening 111a.

The sweeper body 100 can also include a rear wheel 118. The rear wheel 118 may be rotatably disposed on a bottom surface of the housing 110 and disposed rearward of the front wheels 117a and 117b.

The housing 110 may further include a support member 119 disposed on a lower side of the body portion 111. The support member 119 can support the body portion 111. The front wheels 117a and 117b can be rotatably coupled to the support member 119.

The support member 119 may be provided with an extension portion 1192 extending to the rear thereof. The extension portion 1192 can be rotatably coupled to the rear wheel 118. Further, the extending portion 1192 may support the first connecting member 113a and the second connecting member 113b on the lower sides of the first connecting member 113a and the second connecting member 113b.

The rotation shaft 118a of the rear wheel 118 may be disposed rearward with respect to the center 124a of the hinge shaft 124. This improves the stability of the housing to prevent the housing 110 from flipping during cleaning.

Hereinafter, a detailed configuration of the drive unit 140 will be described.

Figure 12 is a view illustrating a state in which the first side cover of the suction nozzle is removed; Figure 13 is an exploded perspective view of the drive unit; and Figure 14 is a cross-sectional view illustrating the drive unit cut along the rotation axis of the rotary cleaning unit .

Referring to FIGS. 12 through 14, a driving unit 140 for rotating the rotary cleaning unit 130 is coupled to the main body portion 111 of the housing 110. At least a portion of the drive unit 140 may be inserted into one side of the rotary cleaning unit 130.

The drive unit 140 includes a motor 143 and a motor support 141 for generating a driving force. Motor 143 may include a brushless direct current (BLDC) motor. A printed circuit board (PCB) 1432 for controlling the motor 143 may be disposed on one side of the motor 143.

The motor 143 can be coupled to the motor support 141 through a coupling member such as a bolt. The motor 143 may be provided with a coupling hole 1434 that uses a bolt to couple with the motor support 141.

The drive unit 140 may also include a gear portion 145 for transmitting the driving force of the motor 143.

The motor 143 can be inserted into the gear portion 145. To this end, a hollow portion may be formed inside the gear portion 145. Gear portion 145 can be coupled to motor support 141 via a bolt. To this end, the coupling hole 1454 may be formed in one side of the gear portion 145. Gear portion 145 and motor 143 may be integrally coupled to motor support 141 to reduce the generation of vibrations of motor 143 during operation.

The motor support 141 may be made of polycarbonate. Polycarbonate materials are characterized by high insulation and impact resistance. Therefore, the motor support 141 can resist external impact and prevent externally generated static electricity or the like from being transmitted to the motor 143.

Moreover, the inner circumferential surface of the motor support 141 is spaced apart from the printed circuit board 1432 of the motor 143. Therefore, even when static electricity generated in the main body portion 111 is transmitted to the driving unit 140, the static electricity can be naturally discharged without reaching the printed circuit board 1432 of the motor 143, which can protect the printed circuit board 1432 of the motor 143.

The motor support 141 is spaced apart from the inner circumferential surface of the first side cover 115. Therefore, the cooling flow path for cooling the drive unit 140 can be ensured.

The drive unit 140 may further include an outer cover portion 147 that encloses the gear portion 145. The outer cover portion 147 has a function of protecting the gear portion 145.

The drive unit 140 also includes a shaft 148 that is coupled to the gear portion 145, and the shaft member 148 is coupled to the rotary sweep unit 130. The shaft member 148 can transmit the driving force transmitted through the gear portion 145 to the rotary cleaning unit 130. Accordingly, the rotary cleaning unit 130 can be rotated.

The drive unit 140 may further include a bearing 149 mounted on the outer cover portion 147. The bearing 149 can be coupled to the shaft member 148 to secure the shaft member 148 at a predetermined position and can rotate the shaft member 148 while supporting the weight of the shaft member 148 itself and the load applied to the shaft member 148. Accordingly, the shaft member 148 can rotate smoothly.

The shaft member 148 includes a fixing member 1482 that is fixed to the rotary cleaning unit 130. Therefore, the shaft member 148 can be rotated together with the rotary cleaning unit 130 in a fixed state. Therefore, the shaft member 148 can rotate the rotary cleaning unit 130 by using the driving force transmitted by the motor 143 and the gear portion 145.

Hereinafter, a configuration of the rotary cleaning unit 130 capable of preventing static electricity from being transmitted to the user will be described.

Fig. 15 is a conceptual diagram illustrating an example of a rotary cleaning unit.

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 the direction of the rotation axis of the rotary cleaning unit 130.

The nozzle body 131 is rotatably mounted inside the housing 110 (see FIG. 2 and the like). The nozzle body 131 is provided with at least one protruding portion 131a, 131b on its inner circumferential surface. When the rotary cleaning unit 130 is mounted in the housing 110, the protruding portions 131a, 131b of the nozzle body 131 are engaged with the driving unit 140 (see Fig. 13). Therefore, the nozzle body 131 can receive the rotational driving force from the driving unit 140.

The nozzle body 131 may be formed of metal (extruded material) or plastic material (injected material), but the material of the nozzle body 131 is not particularly limited in the present invention. The metal can be extruded into the shape of the nozzle body. Extrusion refers to a molding process for producing a product having a predetermined cross-sectional area by injecting a raw material and extruding it in one direction. On the other hand, the plastic can be sprayed into the shape of the nozzle body 131. Injection refers to a molding method of producing a product according to the shape of a mold by injecting a raw material into one of an upper mold and a lower mold and pressing it with another.

Since the nozzle body 131 rotates at a high speed, it is necessary to ensure minimum durability. The minimum thickness of the nozzle body 131 for ensuring the minimum durability may vary depending on the material. Here, the thickness of the nozzle body 131 means the difference between the outer radius and the inner radius of the nozzle body.

The strength of the plastic is weaker than that of the metal. Therefore, the minimum thickness of the plastic used to ensure minimum durability should be greater than the minimum thickness of the metal. When the minimum thickness of the nozzle body 131 is large, the weight of the nozzle body 131 becomes relatively heavy, and thus the load of the motor 143 (see FIG. 12) for rotating the nozzle body 131 is also increased. Moreover, the increased thickness of the nozzle body 131 will result in an increase in material cost.

In this regard, the nozzle body 131 is preferably formed of a metallic material rather than a plastic material. In particular, since the aluminum extruded product is light in weight and has sufficient strength in the metal, it is suitable as a 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 the design, the rotary cleaning unit 130 may have no fiber layer 134, and in this case, the fiber filaments 132 and the metal filaments 133 may be directly coupled to the outer circumferential surface 131 of the nozzle body.

The fiber filaments 132 and the metal filaments 133 are disposed on the outer circumferential surface of the nozzle body 131. The metal filaments 133 are organic conductive fibers. The fiber filaments 132 and metal filaments 133 may be coupled to the nozzle body 131 or to the fiber layer 134. FIG. 15 illustrates an arrangement 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 grown on the fiber layer 134 may be randomly arranged. The fiber filaments 132 can be implanted without any difference or uniformity, and the metal filaments 133 can be sparsely implanted between the fiber filaments 132. The 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 140, the fiber filaments 132 and the metal filaments 133 rotate together with the nozzle body 131. The fiber filaments 132 and the metal filaments 133 collide with the floor or carpet so that debris, dust, and the like present on the floor or carpet can be removed.

When the rotary cleaning unit 130 rotates, the fiber filaments 132 and the floor (or carpet) to be cleaned collide with each other, and static electricity caused by friction is generated during the collision. If the fiber filaments 132 are provided only on the outer circumferential surface of the rotary cleaning unit 130 without the metal filaments 133, the static electricity is even transmitted to the handle 13 along the wires in the cleaner body 10 or the cleaner body 10 (see Fig. 1). Or user (see Figure 1).

However, as shown in the present invention, when the metal filaments 133 are provided on the rotary cleaning unit 130, the conductive metal filaments 133 can allow the static electricity generated by the fiber filaments 132 to be discharged or eliminated therethrough. Since the metal filament 133 is used as a charging path for connection to a floor or carpet or for removing static electricity, it is possible to prevent static electricity from being transmitted to the user. It can be seen from the inspection that when the rotary cleaning unit is provided only with the fiber filaments 132 and no metal filaments 133, the electrostatic capacity is about 8 kV, but when the rotary cleaning unit 130 is provided with both the fiber filaments 132 and the metal filaments 133, The electrostatic capacity was reduced to 1.6 kV.

The fiber filaments 132 may be formed of nylon. The metal filaments 133 may include fiber filaments 133a (see FIG. 16) such as nylon and a conductive coating 133b (see FIG. 16). The fiber filaments 133a contained in the metal filaments 133 may be made of the same material or a different material as that of the fiber filaments 132 implanted on the nozzle body 131 or the fiber layer 134. Metal filaments 133 will be described in more detail with reference to FIG.

FIG. 16 is a conceptual diagram illustrating a manufacturing process of the rotary cleaning unit 130.

In order to manufacture the rotary cleaning unit 130, the metal filaments 133 must first be manufactured. These metal filaments 133 should be implanted with the fiber filaments 132 into the nozzle body 131 or the fibrous layer 134.

Referring to Fig. 16, in order to manufacture the metal filament 133, very long fiber filaments 133a are first prepared. The fiber filament 133a may be formed of nylon.

Subsequently, a conductive material is coated on the outer circumferential surface of the fiber filament 133a to form a conductive coating 133b. The conductive coating 133b may be formed of brass or sillimanite (Cu ₉ S ₅ ).

The average thickness of the conductive coating 133b is preferably from 0.3 to 1.0 μm. The average thickness A of the conductive coating layer 133b means the remainder of the radius of the fiber filament 133a removed from the radius of the metal filament 133. If the average thickness of the conductive coating 133b is thinner than 0.3 μm, it is difficult to sufficiently prevent static electricity. This is because sufficient conductivity is not provided to the metal filaments 133. Conversely, if the average thickness of the conductive coating 133b exceeds 1.0 μm, the friction with the floor or carpet to be cleaned will excessively increase, making it difficult to perform cleaning smoothly.

Next, the fiber filaments 133a having the conductive coating 133b are cut into lengths suitable for planting. A plurality of (one bundle) cut wires (filaments, i.e., cut fiber filaments) are twisted together to completely form a metal filament 133.

Finally, metal filaments 133 are implanted onto fiber layer 134 along with fiber filaments 132. The fiber filaments 132 implanted together with the metal filaments 133 are formed by passing a bundle of wires. The fiber layer 134 is formed with a plurality of planting portions 135a, 135b planted with the fiber filaments 132 and the metal filaments 133. The planting portions 135a, 135b are disposed in a manner spaced apart from each other. Each of the planting portions 135a, 135b is provided with a hole 135a and a bridge member 135b that traverses the hole 135a.

The hole 135a of the planting portion 135a, 135b is divided into two by the bridge member 135b. When the fiber filaments 132 and the metal filaments 133 planted on one of the planting portions 135a, 135b are inserted into one side hole to traverse the other side hole, the center of the fiber filament 132 and the center of the metal filament 133 are Place them where they encounter the bridge 135b. Both ends of each of the fiber filaments 132 and the metal filaments 133 extend away from the center of the nozzle body 131.

The fiber filaments 132 and the metal filaments 133 are supported by the support portion 136. The support portion 136 is formed between the nozzle body 131 and the fiber layer 134. The fiber layer 134 is formed to surround the nozzle body 131, and the support portion 136 is formed by curing the adhesive between the nozzle body 131 and the fiber layer 134. The center of the fiber filaments 132 and the center of the metal filaments 133 may be fixed to the bridge member 135b through the support portion 136.

The support portion 136 can determine the arrangement of the fiber filaments 132 and the metal filaments 133. For example, the support portion 136 may extend along the longitudinal direction of the nozzle body 131, extend in the circumferential direction of the nozzle body 131, or extend in the spiral direction of the nozzle body 131. Therefore, the fiber filaments 132 and the metal filaments 133 may be disposed to extend in the longitudinal direction, the circumferential direction, or the spiral direction of the nozzle body 131.

When an object with a positive (+) or negative (-) polarity approaches, the metal filament 133 will generate a negative charge of negative polarity or positive polarity and instantaneously neutralize static electricity by corona discharge. The metal filament 133 has an effect of eliminating static electricity caused by corona discharge.

Further, since the metal filaments 133 include the conductive coating layer 133b formed of lanolinite, the metal filaments 133 have antibacterial and deodorizing properties provided by the lanolinite. For example, the metal filaments 133 have an antibacterial effect against Staphylococcus aureus, Klebsiella pneumoniae, Escherichia coli, Pseudomonas aeruginosa and the like.

Moreover, the metal filaments 133 have heat storage properties and electromagnetic wave absorption properties provided by the lanolinite. Thermal storage means that it absorbs sunlight or near-infrared rays and converts it into heat. Electromagnetic wave absorption performance refers to absorption of electromagnetic waves emitted from a mobile terminal or the like and conversion thereof into thermal energy.

The average thickness of the metal filaments 133 is preferably in the range of 220 to 260 decitex (deci-Tex or dexi-Tex). If the average thickness of the metal filaments 133 is less than 220 decitex, the metal filaments 133 are sparsely disposed on the outer circumferential surface of the fiber layer 134, which may result in a decrease in cleaning performance. In addition, the sealing may not be sufficiently performed, so that dust may be entangled between the metal filaments 133. Conversely, when the average thickness of the metal filaments 133 exceeds 260 dtex, the metal filaments 133 are closely attached to the main body portion 111 (see FIG. 2) of the suction nozzle 100, so that the suction motor is excessively loaded. increase. Moreover, the friction with the floor or carpet to be cleaned is excessively increased, making it difficult to perform the cleaning smoothly.

The ratio of the metal filaments 133 to the total number of the fiber filaments 132 and the metal filaments 133 is preferably 2.5% or more. For example, if the total 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 electrostatic transmission or removing static electricity cannot be sufficiently achieved. On the other hand, when the number ratio of the metal filaments 133 is increased, the effect of preventing electrostatic transmission or removing static electricity is increased, but the increase is not large. Moreover, when the ratio of the number of the metal filaments 133 reaches 25%, the effect of preventing electrostatic transmission or removing static electricity will be saturated.

Both the fiber filaments 132 and the metal filaments 133 have a certain thickness. Therefore, although the planting portions 135a, 135b are spaced apart from each other, 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 ratio of the number of the metal filaments 133 is almost the same as the area ratio. Therefore, it is preferable that the area ratio of the metal filaments 133 on the outer circumferential surface of the nozzle body 131 is 2.5% or more. The technical significance of the lower limit or saturation of the effect of preventing electrostatic transmission or removal of static electricity is replaced by the above-mentioned quantitative ratio.

The electric resistance of one strand (wire) of the metal filament 133 is preferably 100 kΩ or less. The resistance of the metal filament 133 is not infinite, meaning that the metal filament 133 has electrical conductivity. However, if the electric resistance of one strand 133 of the metal filament 133 exceeds 100 k?, the effect of preventing electrostatic transmission or removing static electricity will be deteriorated.

The surface resistance value of the rotary cleaning unit 130 including the metal filaments 133 is preferably in the range of 1 × 10 ² to 1 × 10 ³ Ω / 10 cm. Further, the specific resistance value of the metal filament 133 is preferably in the range of 1 × 10 ^-1 to 1 × 10 ^-2 Ω/10 cm. The meaning of the surface resistance value and the meaning of the specific resistance value are replaced by the meaning of the meaning of the resistance of the single metal filament 133.

The tensile strength of the single metal filament 133 is preferably 3.5 cN/dTex (centiNewton/minute Tex) or higher. The tensile strength is a numerical value indicating the mechanical durability and reliability of the metal filament 133.

The tensile elongation of the single metal filament 133 is preferably from 33 to 45%. When the rotary cleaning unit 130 rotates, the metal filaments 133 are wound around the carpet to be cleaned. Therefore, the metal filaments 133 must have a tensile elongation value of 33% or more to be cleaned while being entangled with the carpet to be cleaned. However, if the tensile elongation of the metal filaments 133 exceeds 45%, only the length of some of the metal filaments 133 on the rotary cleaning unit 130 may be too long to easily form an uneven outer circumferential surface, which may result in deteriorated cleaning performance. .

The metal filaments 133 may have a specific gravity of 1.05 to 1.20 g/cm ³ and a process moisture regain ratio of 4.5% or less. These conditions are to ensure the best effect of preventing static electricity transmission or static electricity removal and optimum cleaning performance.

Hereinafter, various examples of the rotary cleaning unit 130 will be described.

FIG. 17 is a conceptual diagram illustrating another example of the rotary cleaning unit 230.

The rotary cleaning unit 230 includes a strip portion 237 and an antistatic portion 238. The strip portion 237 and the antistatic portion 238 differ depending on which of the fiber filaments 132 (see Fig. 16) and the metal filaments 133 (see Fig. 16) are planted thereon.

The strip portion 237 is provided with a filament 132. The metal filaments 133 are not implanted into the strip portion 237.

The antistatic portion 238 is provided with a fiber filament 132 and a metal filament 133. In the number ratio and area ratio of the above metal filaments 133, each denominator is the sum of the strip portion 237 and the antistatic portion 238.

Referring to FIG. 17, the strip portion 237 extends along the length direction of the nozzle body 231. The plurality of strip portions 237 are spaced apart from each other. An antistatic portion 238 is disposed between the strip portions 237. Each antistatic portion 238 extends along the length direction of the nozzle body 231 like the strip portion 237. The antistatic portions 238 are spaced apart from one another.

The intervals between the strip portions 237 are equal to each other. Moreover, the intervals between the antistatic portions 238 are equal to each other. The spacing between the strip portion 237 and the antistatic portion 238 may be the same or different from each other. Strip portion 237 and antistatic portion 238 may further comprise a dye coating.

In Fig. 17, unillustrated reference numerals 231a and 231b denote projections, and 234 denotes a fiber layer.

FIG. 18 is a conceptual diagram illustrating another example of the rotary cleaning unit 330.

The strip portion 337 extends in the circumferential direction of the nozzle body 331. The plurality of strip portions 337 are spaced apart from each other. The antistatic portion 338 is disposed between the strip portions 337. Like the strip portion 337, each antistatic portion 338 also extends along the circumferential direction of the nozzle body 331. The antistatic portions 338 are spaced apart from one another.

The width of the strip portion 337 and the interval therebetween are equal to each other. Moreover, the width of the antistatic portion 338 and the interval therebetween are equal to each other. The width of the strip portion 337 and the antistatic portion 338 and the interval between the strip portion 337 and the antistatic portion 338 may be the same or different from each other. Strip portion 337 and antistatic portion 338 may further comprise a dye coating.

In Fig. 18, unillustrated reference numerals 331a and 331b denote projections, and 334 denotes a fiber layer.

FIG. 19 is a conceptual diagram illustrating another example of the rotary cleaning unit 430.

The strip portion 437 extends in the spiral direction of the nozzle body 431. The plurality of strip portions 437 are spaced apart from each other. Antistatic portion 438 is disposed between strip portions 437. Like the strip portion 437, each antistatic portion 438 also extends in the spiral direction of the nozzle body 431. The antistatic portions 438 are spaced apart from one another.

The strip portion 437 and the antistatic portion 438 extend in the spiral direction. Therefore, when the rotary cleaning unit 430 is viewed from the front, the strip portion 437 is formed in an inclined shape, and the antistatic portion 438 is disposed between the strip portions 437 in an inclined state.

The width of the strip portion 437 and the interval therebetween are equal to each other. Moreover, the width of the antistatic portion 438 and the interval therebetween are equal to each other. The width of the strip portion 437 and the antistatic portion 438 and the spacing between the strip portion 437 and the antistatic portion 438 may be the same or different from each other. Strip portion 437 and antistatic portion 438 can further include a dye coating.

In Fig. 19, unillustrated reference numerals 431a and 431b denote protrusions, and 434 denotes a fiber layer.

In the following, another embodiment of the suction nozzle 510 will be described.

Figure 20 is a cross-sectional view showing another embodiment of the suction nozzle; and Figure 21 is an enlarged cross-sectional view of a portion A in Figure 20.

The structure in which the drive unit 540 is provided with a brushless direct current (BLDC) motor and disposed on one side of the rotary cleaning unit 530 has been described above. However, the drive unit 540 may be provided with a DC motor 543 instead of a brushless DC motor. In particular, the DC motor 543 has the advantage that it is less expensive than a brushless DC motor.

If the size of the DC motor 543 is large, it may be insufficient in space to mount the DC motor 543 in one side of the rotary cleaning unit 530. In this case, as shown in FIG. 20, the direct current motor 543 can be mounted inside the hollow body 531 (hollow portion). The driving force generated by the DC motor 543 can be transmitted to the nozzle body 531 through the shaft member 548, the gear 545, and the like.

The cover portion 547 may be formed to surround the DC motor 543 and the gear 545. The cover portion 547 is coupled to the circumference of the DC motor 543 and supports the DC motor 543.

The motor housing 542 is formed to surround the direct current motor 543, the gear 545, the outer cover portion 547, the shaft member 548, and the like. The DC motor 543, the gear 545, the outer cover portion 547, the shaft member 548, and the like are housed inside the motor housing 542.

The nozzle body 531 is rotatably supported by the support members 549a, 544, and 550. Here, the support members 549a, 544, and 550 are concepts including each configuration that rotatably supports the nozzle body 531 regardless of its shape or configuration.

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 different materials. The suction nozzle 510 includes a bracket 546a and a bracket 546b to suppress generation of noise and scratches. Since the bracket 546a and the bracket 546b rotate together with the nozzle body 531, it can be understood that the rotary cleaning unit 530 includes the bracket 546a and the bracket 546b.

The bearing portions 549a, 544, and the rotation support portion 550 shown in Fig. 20 rotatably support the nozzle body 531 to be included in the concepts of the support members 549a, 544, and 550, respectively. Hereinafter, the bracket 546a disposed between the bearing portions 549a, 544 and the nozzle body 531, and the bracket 546b disposed between the rotation support portion 550 and the nozzle body 531 will be sequentially described. The two brackets 546a and 546b may be referred to as a first bracket 546a and a second bracket 546b to distinguish each other.

Bearing portions 549a, 544 are disposed about shaft 548 for rotation with shaft member 548. The bearing portions 549a, 544 include a bearing 549a and a bearing cap 544.

A bearing 549a is disposed around the shaft member 548 to support the rotating shaft member 548. The bearing 549a is used to secure the shaft member 548 to a predetermined position and rotate the shaft member 548 while supporting the weight of the shaft member 548 and the load of the shaft member 548.

The bearing 549a can be mounted at each position where the support of the shaft member 548 is required. Figure 20 illustrates three bearings 549a, 549b, and 549c disposed about the shaft member 548.

Bearing cap 544 protects bearing 549a. Bearing cap 544 is mounted around bearing 549a. However, a bearing cap 544 is not provided for each bearing 549a. For example, the bearing cap 544 may be provided only on a part of the bearings 544a, 549b, 549c.

The bearing cap 544 is formed of a material different from the nozzle body 531. It has been described that the nozzle body 531 can be formed of an extruded metal material. On the other hand, the bearing cap 544 can be formed from an injection molded plastic material.

The first bracket 546a is coupled to the end of the nozzle body 531 to suppress noise and scratches due to friction between the end of the nozzle body 531 and the bearing 549a. The first bracket 546a is press-fitted into the end of the nozzle body 531 or attached to the nozzle body 531 through the adhesive in the longitudinal direction of the nozzle body 531 (the horizontal direction or the extending direction of the shaft member 548 in FIG. 20). The end.

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 noise and scratches due to friction between the nozzle body 531 and the bearing cap 544.

The first bracket 546a is formed of an injection molded plastic material. This is because when the first bracket 546a and the bearing cap 544 are made of the same material, noise and scratch due to friction between different materials can be suppressed. However, the same material does not mean the exact same material.

When the first bracket 546a is coupled to the nozzle body 531, the first bracket 546a is in contact with the support portions 549a, 544. In more detail, the first bracket 546a is in surface contact with the outer circumferential surface of the bearing cover 544. Therefore, the bearing cap 544 and the first bracket 546a are provided with mutually contacting surfaces S1, S2. The mutual contact faces S1, S2 refer to at least one of the surface S1 of the bearing cap 544 (see FIG. 21) in contact with the first bracket 546a and the surface S2 (see FIG. 21) of the first bracket 546a in contact with the bearing cap 544. .

Referring to Fig. 21, the mutual contact surfaces S1, S2 of the bearing cap 544 and the first bracket 546a are inclined with respect to the longitudinal direction of the nozzle body 531. If the mutual contact surfaces S1, S2 between the bearing cap 544 and the first bracket 546a are parallel to the longitudinal direction of the nozzle body 531, the positions of the bearing 549a and the bearing cap 544 are not fixed during the rotation of the shaft member 548. Therefore, the shaft 548 may move along the length direction of the nozzle body 531.

Therefore, in order to fix the positions of the bearing 549a and the bearing cap 544 during the rotation of the shaft member 548, the mutual contact surfaces S1, S2 between the first bracket 546a and the bearing cap 544 are preferably inclined with respect to the longitudinal direction of the nozzle body 531. .

From a three-dimensional perspective, the mutually contacting surfaces S1, S2 may have a shape corresponding to the sides of the circular frustum. In this case, the radius of the mutually contacting surfaces S1, S2 may gradually increase from the center of the nozzle body 531 to the outside in the longitudinal direction. As the radii of the mutually contacting surfaces S1, S2 gradually increase, the mutual contact surfaces S1, S2 are inclined with respect to the longitudinal direction of the nozzle body 531.

Brackets 546a and 546b can be coupled to both sides of the nozzle body 531, respectively. Referring to FIG. 20, a second bracket 546b coupled to the left side of the nozzle body 531 is formed to surround the rotation support portion 550.

The rotary support portion 550 is coupled to the side cover 516 of the suction nozzle 510. The rotation support portion 550 is inserted into one end portion of the nozzle body 531 to rotatably support the nozzle body 531.

The second bracket 546b is physically coupled to a 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 member 548, and the shaft member 548 may be inserted into the groove or the hole.

The driving force of the DC motor 543 can be transmitted to the nozzle body 531 through the shaft member 548, the gear 545, and the second bracket 546b. The rotation support portion 550 may be fixed to rotate relative to the nozzle body 531 or to rotate together with the nozzle body 531. When the rotation support portion 550 rotates together with the nozzle body 531, the driving force of the direct current motor 543 can be transmitted to the nozzle body 531 through the shaft member 548, the gear 545, the second bracket 546b, and the rotation support portion 550.

The rotary support portion 550 may be formed of an injection molded plastic material. Therefore, when the rotary support 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 provided between the rotation support portion 550 and the nozzle body 531, generation of noise and scratch can be suppressed. This is because the second bracket 546b is formed of the same material as the rotation support portion 550. However, the same material does not mean the exact same material.

The second bracket 546b includes a nozzle body coupling portion 546b1, an extension portion 546b2, and a shaft coupling portion 546b3.

The nozzle body coupling portion 546b1 is formed in a circular shape coupled to the end of the nozzle body 531. The nozzle body coupling portion 546b1 is formed to surround the inner circumferential surface and the outer circumferential surface of the nozzle body 531. The nozzle body 531 is sandwiched between a portion surrounded by the nozzle body 531 and a portion surrounding the nozzle body 531.

The extending portion 546b2 extends from the nozzle body coupling portion 546b1 to the inside of the nozzle body 531 along the inner circumferential surface of the nozzle body 531. The extended portion 546b2 may be in contact with the inner circumferential surface of the nozzle body 531.

The extending portion 546b2 can 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). For example, if the distance between the opposite portions of the extended portion 546b2 (including the distance of the thickness of the extended portion 546b2) is larger than the inner diameter of the nozzle body 531, the two portions of the extended portion 546b2 may be pressed in the radial direction. The nozzle body 531 has a circumferential surface. Since the extending portion 546b2 squeezes the inner circumferential surface of the nozzle body 531, it is possible to prevent any separation of the second bracket 546b from the nozzle body 531.

The shaft coupling portion 546b3 extends from the extension portion 546b2 toward the shaft member 548 to be coupled to the shaft member 548. The shaft coupling portion 546b3 may be disposed between the rotation support portion 550 and the driving unit 540. A polygonal groove or hole corresponding to the shaft member 548 may be formed in the shaft coupling portion 546b3. The shaft member 548 can be inserted through a groove or a hole, and the driving force can be transmitted through the polygonal structure.

As described above, the nozzle body 531 is provided with the protruding portions 531a and 531b (see Fig. 22). The protruding portions 531a, 531b protrude from the inner circumferential surface of the nozzle body 531 and extend along the longitudinal direction of the nozzle body 531.

If the second bracket 546b is rotated 360 degrees with respect to the nozzle body 531, the driving force may not be sufficiently transmitted to the nozzle body 531. For example, the nozzle body 531 can be idling. This is because the driving force is transmitted to the nozzle body 531 through the second bracket 546b.

In order to prevent this, the extended portion 546b2 of the second bracket 546b and the protruding portions 531a and 531b should be in contact with each other. Even if the second bracket 546b and the nozzle body 531 are rotated by a predetermined angle with respect to each other, the extending portion 546b2 presses the protruding portions 531a and 531b in the rotational direction of the nozzle body 531, and thus the driving force can be finally transmitted. To this end, the projections 531a, 531b and the extension portion 546b2 must be on the same plane. Here, the same plane refers to the inner circumferential surface of the nozzle body 531.

In FIGS. 20 and 21, an unillustrated reference numeral 515 denotes a side cover.

22 is a conceptual diagram of a rotary sweep unit 530 and a first bracket 546a coupled to the rotary sweep unit 530.

The nozzle body 531 of the rotary cleaning unit 530 is coupled to the first bracket 546a. When the first bracket 546a is in contact with the surface of the bearing cover 544, the nozzle body 531 is rotatably supported by the bearing cover 544.

The first bracket 546a includes a nozzle body coupling portion 546a1, an extension portion 546a2, and a surface contact portion 546a3.

The nozzle body coupling portion 546a1 is formed in a circular shape that is coupled to the end of the nozzle body 531. The nozzle body coupling portion 546a1 is formed to surround the inner circumferential surface and the outer circumferential surface of the nozzle body 531. The nozzle body 531 is sandwiched between a portion surrounded by the nozzle body 531 and a portion surrounding the nozzle body 531.

The extension portion 546a2 extends from the nozzle body coupling portion 546a1 along the inner circumferential surface of the nozzle body 531 toward the inside of the nozzle body 531. The extended portion 546a2 may be in contact with the inner circumferential surface of the nozzle body 531.

The extension portion 546a2 can be provided in plural. For example, FIG. 22 exemplarily illustrates that the first bracket 546a is provided with four extension portions 546a2. Each of the extending portions 546a2 can 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 the distance between the opposite extending portions 546a2 (the distance including the thickness of the extending portion 546a2) is larger than the 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 direction. . Since the two extending portions 546a2 press the inner circumferential surface of the nozzle body 531, the first bracket 546a and the nozzle body 531 can be prevented from being arbitrarily separated.

The structure in which the extended portion 546a2 is in contact with the protruding portions 531a and 531b of the nozzle body 531 to press the protruding portions 531a and 531b in the rotational direction can 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 546a1. The surface contact portion 546a3 is in surface contact with the bearing portions 549a, 544 to support rotation of the shaft member 548 and the bearing portions 549a, 544. The mutual contact surfaces S1, S2 between the first bracket 546a and the bearing cap 544 have been described (see Fig. 21). 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 formed to be inclined or extended toward the outside is replaced with the foregoing description.

A plurality of surface contact portions 546a3 may be provided. 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 each other. The mutual contact surface S1 of the bearing cap 544 is a closed curve, and the surface contact portion 546a3 is not a closed curve.

The extension portion 546a2 and the surface contact portion 546a3 may be alternately disposed to be uniformly applied to the surface contact portion 546a3 in response to a force required to support the nozzle body 531 and a force required to prevent the first bracket 546a from being arbitrarily separated from the nozzle body 531. The first bracket 546a is given.

In Fig. 22, unillustrated reference numeral 534 denotes a fiber layer, 537 denotes a strip portion, and 538 denotes an antistatic portion.

The above vacuum cleaner is not limited to the configurations and methods of the above embodiments, but the embodiments may be constructed by selectively combining all or part of the embodiments, so that various modifications or changes can be made.

According to the invention having the above structure, the metal filaments provided on the rotary cleaning unit can be used as a passage for charging or neutralizing static electricity generated in the 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.

Furthermore, the present invention can provide an optimum average thickness of the conductive coating or an optimum average thickness of the metal filaments to prevent deterioration of cleaning performance due to an antistatic structure or an overload of the suction motor.

Furthermore, the present invention can improve the reliability of the antistatic structure by providing the optimum physical property value of the metal filament.

Claims (20)

 A vacuum cleaner comprising: a vacuum cleaner body; and a suction nozzle connected to the vacuum cleaner body, wherein the suction nozzle comprises: a casing defining an opening at a front portion of the casing; and a a rotary cleaning unit located inside 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 the housing, and wherein the rotary cleaning unit comprises: a nozzle body rotatably coupled to the interior of the housing, the nozzle body having a cylindrical shape; and a plurality of fiber filaments and a plurality of metal filaments disposed on an outer circumferential surface of the nozzle body .    The vacuum cleaner of claim 1, wherein each of the metal filaments comprises: a fiber filament; and a conductive coating disposed on an outer circumferential surface of the fiber filament.   The vacuum cleaner of claim 2, wherein the conductive coating comprises brass or sillimanite (Cu ₉ S ₅ ).  The vacuum cleaner of claim 2, wherein the conductive coating has an average thickness of 0.3 to 1.0 μm.    The vacuum cleaner of claim 1, wherein the plurality of metal filaments have an average thickness of 220 to 260 decitex (dTex).    The vacuum cleaner of claim 1, wherein the ratio of the number of the plurality of metal filaments to the total number of the plurality of filaments plus the plurality of metal filaments is greater than or equal to 2.5%.    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%.    The vacuum cleaner of claim 1, wherein the single metal filament of the plurality of metal filaments has a resistance of less than or equal to 100 kΩ.    The vacuum cleaner of claim 1, wherein the tensile strength of one of the plurality of metal filaments is greater than or equal to 3.5 centiNewtons per decibel (cN/dTex).    The vacuum cleaner of claim 1, wherein the tensile elongation of one of the plurality of metal filaments corresponds to 33 to 45% of the length of the single metal filament.   The vacuum cleaner according to claim 1, wherein the rotary cleaning unit has a surface resistance value of 1 × 10 ² to 1 × 10 ³ Ω/10 cm. The vacuum cleaner according to claim 1, wherein the plurality of metal filaments have a specific resistance value of from 1 × 10 ^-1 to 1 × 10 ^-2 Ω/10 cm.  The vacuum cleaner of claim 1, wherein the rotary cleaning unit further comprises: a fiber layer surrounding the outer circumferential surface of the nozzle body; and a support portion configured to support the plurality of roots a fiber filament and the plurality of metal filaments, wherein the fiber layer comprises a plurality of planting portions 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 Wherein each of the planting portions comprises a hole and a bridge member traversing the hole, wherein each of the fiber filaments comprises a bundle of wires wound with each other, and each of the metal filaments The root includes a bundle of filaments entangled with each other, wherein a center of each of the filaments and a center of each of the filaments are coupled to the bridge, wherein each of the filaments One end of the root and one end of each of the metal filaments extend outward from the center of the nozzle body, and wherein the support portion is included between the nozzle body and the fiber layer An adhesive, the support portion in a longitudinal direction of the nozzle body, a circumferential direction of the nozzle body, and a helical direction of the nozzle body at least one upper extension.    The vacuum cleaner of claim 1, wherein the rotary cleaning unit further comprises: a belt portion including the plurality of fiber filaments; and an antistatic portion comprising the plurality of fiber filaments and a plurality of the plurality of metal filaments; wherein each of the strip portion and the antistatic portion is in a length direction of the nozzle body, a circumferential direction of the nozzle body, and a spiral of the nozzle body Extending at least one of the directions.    A vacuum cleaner comprising: a vacuum cleaner body; and a suction nozzle connected to the vacuum cleaner body, wherein the suction nozzle comprises: a casing defining an opening at a front portion of the casing; and a a rotary sweeping unit located inside the housing and configured to rotate relative to the housing and including a nozzle body rotatably coupled to the interior of the housing, at least a portion of the rotary sweeping unit transmitting The opening of the housing is exposed; a support member configured to be inserted into at least one end of the nozzle body and configured to rotatably support the nozzle body, the support member comprising a different nozzle a material of the material of the body, and a bracket configured to be coupled to the at least one end of the nozzle body and configured to contact the support member, and wherein a contact surface between the support member and the bracket is opposite It is inclined in a longitudinal direction of the nozzle body.    The vacuum cleaner of claim 15, wherein the vacuum cleaner further comprises a shaft member located inside the nozzle body and extending in the length direction of the nozzle body, wherein the support member Further comprising: a bearing surrounding the shaft member; and a bearing cap surrounding the bearing and comprising a material different from the material of the nozzle body, and wherein the bracket is disposed on the nozzle body and the bearing cap between.    The vacuum cleaner of claim 16, wherein the bracket comprises: a nozzle body coupling portion having a circular shape and configured to be coupled to the at least one end of the nozzle body; An extension portion protruding from the nozzle body coupling portion toward the nozzle body and extending further into the nozzle body along an inner circumferential surface of the nozzle body; and a surface contact portion from the nozzle body An inner circumferential surface of the coupling portion protrudes and is configured to contact the bearing cap, and wherein the extension portion and the surface contact portion are alternately arranged along the inner circumferential surface of the nozzle body coupling portion.    The vacuum cleaner of claim 15, wherein the suction nozzle comprises a side cover configured to cover the at least one end of the nozzle body, wherein the support member further comprises a rotation support portion a rotating support portion coupled to the side cover of the suction nozzle and configured to be inserted into the at least one end of the nozzle body and configured to rotatably support the nozzle body, and wherein The bracket is located between the nozzle body and the rotating support portion.    A vacuum cleaner according to claim 18, further comprising: a driving unit configured to generate a force for rotating the nozzle body; and a shaft member located inside the nozzle body and along the The length of the nozzle body extends and is configured to transfer force from the drive unit to the nozzle body, wherein the bracket includes: a nozzle body coupling portion having a circular shape and configured An at least one end portion coupled to the nozzle body; an extension portion protruding from the nozzle body coupling portion toward the nozzle body and extending further along the inner circumferential surface of the nozzle body to the nozzle body And a shaft coupling portion extending from the extension toward the shaft and configured to be coupled to the shaft.    The vacuum cleaner of claim 15, wherein the nozzle body comprises a protrusion protruding from an inner circumferential surface of the nozzle body, wherein the protrusion is along the nozzle body The lengthwise extension, and wherein the bracket is configured to contact the projection and provide pressure to the projection along a direction of rotation of the nozzle body.