CN209826554U

CN209826554U - Vacuum cleaner with a vacuum cleaner head

Info

Publication number: CN209826554U
Application number: CN201890000237.1U
Authority: CN
Inventors: 梁仁圭; 高武铉; 柳廷玩; 张大号
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2017-04-20
Filing date: 2018-04-19
Publication date: 2019-12-24
Anticipated expiration: 2028-04-19
Also published as: AU2018256172A1; KR20190080855A; TW201838576A; KR102118447B1; KR102312151B1; AU2022200215B2; KR102227459B1; DE112018000186T5; AU2022200215A1; TWI685323B; JP6845924B2; AU2020201882A1; KR102552402B1; KR20200058364A; KR20210030916A; KR20180118026A; JP2019528917A

Abstract

The disclosed vacuum cleaner includes: a cleaner main 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 a partial opening of a front portion, and a rotary cleaning unit disposed inside the housing such that at least a portion thereof is 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 a fiber wire and a metal wire disposed on an outer circumferential surface of the nozzle body.

Description

Vacuum cleaner with a vacuum cleaner head

Technical Field

The present disclosure relates to a structure capable of preventing static electricity generated in a vacuum cleaner from being transferred 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 installed inside a cleaner body and separates the dust from the air for collection.

Such vacuum cleaners are classified into canister type cleaners, upright type cleaners, stick type cleaners, hand type cleaners, robot cleaners, and the like. In the canister type cleaner, a suction nozzle for sucking dust is provided separately from a cleaner body and is connected to the cleaner body by a connection means. For an upright cleaner, the suction nozzle is rotatably coupled to the cleaner body. Stick cleaners and hand-held cleaners are used in a state in which a user holds a cleaner body with a hand. However, the suction motor of the stick type cleaner is disposed near the suction nozzle (lower center) and the suction motor of the hand type cleaner is disposed near the grip portion (upper center). The robot cleaner travels by itself due to the autonomous traveling system so as to perform cleaning by itself.

The suction nozzle refers to a portion that is in contact with the floor to directly suck dust and air. A suction force generated in a suction motor installed inside the cleaner body is transmitted 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 agitator). The rotary cleaning unit scrapes (or sweeps off dust from) the floor or carpet in a rotary manner so as to improve cleaning performance.

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

However, there is a problem in that the generated static electricity is transferred to the user along the cleaner body or the electric wire. In particular, in the case of a stick type cleaner or a hand-held type cleaner, since a user grips the cleaner main body, static electricity may be directly transferred to the user.

Among the prior art documents, korean patent laid-open publication No.10-2012-0027357 (3/21/2012) and the like disclose a configuration for preventing generation or transmission of static electricity. However, since the above-mentioned patent only defines the properties of the filament as sheet resistance, there is a limitation in the large number of applications to vacuum cleaners.

SUMMERY OF THE UTILITY MODEL

Technical problem

An 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 being transferred to a user.

Another aspect of the present disclosure is to provide a vacuum cleaner having a configuration capable of preventing deterioration of cleaning performance or overload of a suction motor due 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.

Technical scheme

A vacuum cleaner according to the present disclosure may include a rotary cleaning unit configured to clean a floor by a rotary operation. The rotary cleaning unit may include a rotatable nozzle body, and a fiber wire and a metal wire disposed on an outer circumferential surface of the nozzle body.

The vacuum cleaner may include: a cleaner main 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, at least a portion of a front surface of which is open. The rotary cleaning unit may be disposed inside the housing, and at least a portion thereof may be exposed through a front opening of the housing.

The nozzle body is rotatably mounted within the housing and has a cylindrical shape.

The metal wire may include a fiber wire and a conductive coating layer coated on an outer circumferential surface of the fiber wire.

The conductive coating may be formed of brass or covellite (Cu9S 5).

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

The wires may have an average thickness of 220 to 260 dTex.

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

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

The resistance of the single wire may be 100k omega or less.

The individual wires preferably have a tensile strength of 3.5cN/dTex (hundredths of newtons per dTex) or greater.

The single wire may have a tensile elongation of 33% to 45%.

The surface resistance value of the rotary cleaning unit may be 1 × 10²To 1X 10³Ω/10cm。

The wire may have a resistance coefficient value of 1 x 10^-1To 1X 10^-2Ω/10cm。

Each of the fiber filaments and the metal filaments may be formed by winding a bundle of wires.

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

A center of the fiber wire and a center of the metal wire may be fixed to the bridge, and both ends of each of the fiber wire and the metal wire may extend outward from the center of the nozzle body.

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

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

The rotary cleaning unit may include a band portion provided with the filament and an antistatic portion provided with the filament and the metal wire.

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

The band part and the antistatic part may have the same width.

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

The metallic 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 in surface contact with the support member.

The mutual contact surface between the support member and the supporter may be inclined with respect to the length direction of the nozzle body.

The support member may include: a bearing mounted around an axis 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 that of the nozzle body, and the supporter may be disposed between the nozzle body and the bearing cover.

The stent may include: a nozzle body coupling portion having a circular shape coupled to the end portion of the nozzle body; an extension extending into the mouth body from the mouth body coupling portion along an inner peripheral surface of the mouth body; and a surface contact portion protruding from an inner circumferential surface of the nozzle body coupling portion, in surface contact with the bearing cap.

The extensions and the surface contact may be alternately arranged.

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

The stent may include: a nozzle body coupling portion having a circular shape coupled to the end portion of the nozzle body; an extension extending into the mouth body from the mouth body coupling portion along an inner peripheral surface of the mouth body; and a shaft coupling portion extending from the extension portion toward the shaft so as to be coupled to the shaft transmitting the driving force generated by the driving unit to the nozzle body.

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

Advantageous effects

According to the present disclosure having the above-described structure, the wire provided on the rotary cleaning unit may be used as a passage for charging or neutralizing static electricity generated in the fiber filaments. Thus, static electricity generated in the filament can be discharged or eliminated by the wire before being delivered to the user.

In addition, the present disclosure may provide an optimal average thickness of the conductive coating layer or an optimal average thickness of the wire in order to prevent deterioration of cleaning performance due to an overload of the anti-static structure or the suction motor.

In addition, the present disclosure may improve the reliability of the antistatic structure by providing optimal physical property values of the metal wires.

Drawings

Fig. 1 is a perspective view of a vacuum cleaner according to one embodiment of the present disclosure.

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 front view of the suction nozzle of figure 1.

Fig. 6 is a view illustrating a state in which the 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 perspective view of the housing.

Fig. 10 is a sectional view of the suction nozzle taken along line I-I' of fig. 7.

Fig. 11 is a sectional view taken along line II-II' of fig. 7.

Fig. 12 is a view illustrating a state where the first side cover of the suction nozzle is removed.

Fig. 13 is an exploded perspective view of the drive unit.

Fig. 14 is a sectional view illustrating the driving unit cut along the rotation axis of the rotary cleaning unit.

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

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

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

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

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

Fig. 20 is a sectional view illustrating another example of the 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 the first bracket coupled to the rotary cleaning unit.

Detailed Description

Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the exemplary drawings. For the sake of brief description with reference to the drawings, the same or similar reference numerals will be provided for the same or equivalent parts, and the description thereof will not be repeated. In describing the present disclosure, if a detailed description of related known functions or configurations is considered to unnecessarily divert the gist of the present disclosure, the description has been omitted, but will be understood by those skilled in the art.

It will be understood that, although the terms "first," second, "" A, B, (a), (b), etc. may be used herein to describe various elements of embodiments of the disclosure, these terms are generally only used to distinguish one element from another, and the nature, order, or sequence of elements is not limited by these terms. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "connected" or "coupled" to another element, there are no intervening elements present.

Referring to fig. 1, a vacuum cleaner 1 according to an embodiment of the present disclosure may include: a cleaner main body 10 having a suction motor (not shown) therein for generating a suction force; a suction nozzle 100 through which air containing 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, and the dust container 12 stores therein dust separated from air. Accordingly, dust introduced through the suction nozzle 100 can be stored in the dust container 12 via the extension pipe 17.

A handle 13 for a user to grip may be provided on the 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 part 15 for receiving the battery therein. The battery receiving part 15 may be provided in a lower portion of the handle 13. A battery (not shown) may be connected to the nozzle 100 to supply power to the nozzle 100.

Hereinafter, the suction nozzle 100 will be described in more detail.

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, fig. 4 is a side 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 perspective view of a housing, fig. 10 is a sectional view of the suction nozzle taken along line I-I 'of fig. 7 and fig. 11 is a sectional view taken along line II-II' of fig. 7.

Referring to fig. 2 to 11, the suction nozzle 100 includes a housing 110, a connection pipe 120, and a rotary cleaning unit 130.

The housing 110 includes a body portion 111, and a cavity 112 is formed in the body portion 111. The main body 111 may be provided with a front opening 111a through which air containing contaminants is drawn. The air introduced through the front opening 111a by the suction force generated in the cleaner body 10 may move to the connection pipe 120 via the chamber 112.

The front opening 111a extends in the left-right direction of the housing 110. The front opening 111a may extend up to the front of the housing 110 and the bottom of the housing 110. This will result in ensuring that there is a sufficient suction area, thereby cleaning evenly even that part of the floor adjacent to the wall surface.

The housing 110 may further include an inner tube 1112 in communication with the front opening 111 a. The suction force generated in the cleaner body 10 may allow external air to move into the internal flow path 1112a of the inner pipe 1112 through the front opening 111 a.

The housing 110 may further include a driving unit 140, and the driving unit 140 serves to supply 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 a 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 main body 111. At least a portion of the rotary cleaning unit 130 may be exposed to the outside through the front opening 111 a. The rotary cleaning unit 130 may rub the floor while rotating by the driving force transmitted from the driving unit 140, thereby shaking (sweeping, scraping) the contaminants. In addition, the outer circumferential surface of the rotary cleaning unit 130 may be made of fabric such as lint or felt material. Therefore, foreign substances such as dust accumulated on the floor may be caught in the outer circumferential surface of the rotary cleaning unit 130 while the rotary cleaning unit 130 is rotated, thereby being effectively removed.

The body part 111 may cover at least a portion of an upper side of the rotary cleaning unit 130. The inner circumferential surface of the main body part 111 may have a curved shape corresponding to the shape of the outer circumferential surface of the rotary cleaning unit 130. Accordingly, the main body 111 can perform a function of preventing foreign substances swept from the floor while the rotary cleaning unit 1309 is rotated from moving upward.

The housing 110 may further include side covers 115 and 116 covering both sides of the cavity 112. Side covers 115 and 116 may be disposed on both side surfaces of the rotary cleaning unit 130.

The side covers 115 and 116 include a first side cover 115 disposed at one side of the rotary cleaning unit 130 and a second side cover 116 disposed at the other side of the rotary cleaning unit 130. The first side cover 115 may be fixedly coupled with the driving unit 130.

The suction nozzle 100 further includes a rotation support 150, and the rotation support 150 is provided on the second side cover 116 for rotatably supporting the rotary cleaning unit 130. The rotation support part 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 sectional view of fig. 10, the rotary cleaning unit 130 may rotate in a counterclockwise direction. That is, the rotary cleaning unit 130 is rotated in such a manner that foreign substances or impurities are pushed from a contact point with the floor toward the inner pipe 112. Accordingly, foreign substances swept by the rotary cleaning unit 130 from the floor are moved toward the inner pipe 1112 and are sucked into the inner pipe 1112 by a suction force. As the rotary cleaning unit 130 rotates backward with respect to the contact point with the floor, the cleaning efficiency may be improved.

The chamber 112 may be provided with a partition member 160. The partition member 160 may extend from the top to the bottom of the case 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 where the rotary cleaning unit 130 is located and a second region 112b where the inner pipe 1112 is located. As illustrated in fig. 10, the first region 112a may be disposed in a front portion of the chamber 212 and the second region 112b may be disposed in a rear portion of the chamber 212.

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. Accordingly, when the rotary cleaning unit 130 rotates, the first extension wall 161 may rub the rotary cleaning unit 130 to sweep out foreign substances caught in the rotary cleaning unit 130.

The first extension wall 161 may extend along the rotation axis of the rotary cleaning unit 130. That is, a 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. Accordingly, the first extension wall 161 may remove foreign substances caught in the rotary cleaning unit 130 while preventing foreign substances on the floor from being introduced into the first region 112a of the chamber 112. Since 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 111a due to the rotation of the rotary cleaning unit 130.

In addition, the first extension wall 161 may prevent hairs or yarns caught in the rotary cleaning unit 130 from being introduced into the first region 112a of the chamber 112, thereby preventing such hairs or yarns from being wound around the rotary cleaning unit 130. That is, the first extension wall 161 may perform an anti-wind function.

The partition member 160 may also be 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. Accordingly, when the rotary cleaning unit 130 rotates, the second extension wall 165 may rub the rotary cleaning unit 130 like the first extension wall 161 in order to sweep away foreign substances caught in 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 substances caught in the rotary cleaning unit 130 may be performed only with the first extension wall 161 without the second extension wall 162. 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 auxiliary-separating foreign substances that have not been removed from the rotary cleaning unit 130 with the first extension wall 161.

Hereinafter, the flow of air inside the case 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 so that external air flows 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 at a lower side of the rotary cleaning unit 130 and upper flow paths F2 and F3 formed at an upper side of the rotary cleaning unit 130.

A lower flow path F1 is formed at the lower side of the rotary cleaning unit 130. Specifically, the lower flow path F1 is connected to the inner flow path 1112a from the front opening 111a via the lower side of the rotary cleaning unit 130 and the second region 112 b.

Upper flow paths F2 and F3 are formed at an 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 via the upper side of the rotary cleaning unit 130 within the first region 112a and the second region 112 b. Thus, the upper flow paths F2 and F3 may engage the lower flow path F1 in the second region 112 b.

The upper flow paths F2 and F3 include a first upper flow path F2 formed at one side of the housing 110 and a second upper flow path F3 formed at 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.

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

The first lower groove 161a is formed by recessing a portion of the inner circumferential surface of the first extension wall 161 (that is, the surface of the first extension wall 161 that contacts the rotary cleaning unit 130). In addition, the first lower groove 161a may extend along the circumferential direction of the rotary cleaning unit 130.

The first upper groove 165a is formed by partially recessing the inner circumferential surface of the second extension wall 165 (that is, the surface of the second extension wall 165 that contacts the rotary cleaning unit 130). The first upper groove 165a may extend along the circumference of the rotary cleaning unit 130.

The first lower groove 161a may be connected to the first upper groove 165a, and a first upper flow path F2 is formed along the first lower groove 161a and the first upper groove 165 a. 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 161 a.

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 drive unit 140 along the circumference of the drive unit 140. The driving unit 140 may be cooled by the air flowing along the first upper flow path F2.

As illustrated, 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 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-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 narrows. Therefore, the flow rate of the air may be reduced or the flow of the air may be blocked, thereby causing insignificant cooling performance of the driving 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 increases, and therefore the flow velocity of the air may increase. However, the function of the anti-rotation cleaning unit 130 by the first and second extension walls 161 and 165 being entangled by hairs or the like may be deteriorated. Therefore, the width a in the left-right direction should have an appropriate value and may be smaller than the length of the drive unit. For example, the width a of the first upper groove 165a in the left-right direction may be 5mm to 10mm, but is not limited thereto.

As illustrated in fig. 11, toward the inside of the chamber 112, 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 become narrower and narrower. 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 at the front opening 111a side, d2 at the first upper groove 165a and d3 at the first lower groove 161 a. The separation distance has increasingly smaller values from d1 to d3 (d1> d2> d 3). For example, d1 may be 3mm, d2 may be 2.7mm and d3 may be 2 mm. With this feature, the flow rate of air can be reduced toward the front opening 111a of the upper side of the rotary cleaning unit 130, which can prevent foreign 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 may be formed in the first extension wall 161 and a second upper groove 165a may be formed in the second extension wall 165.

The second lower groove 161a is formed on the inner circumferential surface of the first extension wall 161 (that is, the surface of the first extension wall 161 that contacts the rotary cleaning unit 130) at a position adjacent to the second side cover 116. The second lower groove 161b is different from the first lower groove 161a in the formation position of the second lower groove 161b, and the rest is substantially the same.

The second upper groove 165b is formed on the inner circumferential surface of the second extension wall 165 (that is, the surface of the second extension wall 165 contacting the rotary cleaning unit 165) at a position adjacent to the second side cover 116. The second upper groove 165b is connected to the second lower groove 161b, and a second upper flow path F3 is formed along the second lower groove 161b and the second upper groove 165 b. 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 161 b.

The second lower groove 161b and the second upper groove 165b may be formed to surround the rotation support part 150. Accordingly, the second upper flow path F3 may be formed along the peripheral edge of the rotary support 150, and the rotary support 150 may 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 present disclosure is not limited to this feature. A width a of each of the second lower groove 161b and the second upper groove 165b in the left-right direction may be the same as a width a of each of the first lower groove 161a and the first upper groove 165a in the left-right direction.

Similarly as in 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 be reduced toward the inner side of the chamber 112. Therefore, a detailed description thereof will be omitted.

The partition member 160 may also be 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. Since the first and second lower grooves 161a and 161b are formed in the first extension wall 161, the third extension wall 163 may be partially exposed at the first region 112 of the chamber 112.

As such, the housing 110 is provided with not only the lower flow path F1 provided at the lower side of the rotary cleaning unit 130 but also the first upper flow path F2 provided at the upper side of the rotary cleaning unit 130, which results in that the driving unit 140 can be cooled efficiently. The housing 110 is also provided with a second upper flow path F3, which results in efficient cooling of the rotary support 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 case 110 and the other side of the connection pipe 120 is connected to the extension pipe 17.

The connection tube 120 may be provided with a detachable button 122 for manipulating the mechanical coupling with the extension tube 17. The user can couple or decouple 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 hinge-coupled to the first connection member 113a so as to be vertically rotatable.

The case 110 may be provided with connection members 113a and 113b for hinge-coupling with the connection pipe 120. The connection members 113a and 113b may be formed to surround the inner tube 1112. The connection members 113a and 113b may include a first connection member 113a and a second connection member 113b 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 the other side of the second connection member 113b may be coupled to the body part 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 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 113 a. 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 connection member 113 a. Accordingly, the rotation center of the connection pipe 120 may be formed higher than the central axis C of the first connection member 113 a.

The first connecting member 113a may be rotatably connected to the second connecting member 113 b. Specifically, the first connection member 113a can be rotatable in the length direction as the rotation axis.

The suction nozzle 100 may further include an auxiliary hose 123, and the auxiliary hose 123 connects the connection pipe 120 and the inner pipe 1112 of the housing 110 to each other. Accordingly, the air 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 may be rotated. In addition, the first connection member 113a may have a shape surrounding at least a portion of the auxiliary hose 123 to protect the auxiliary hose 123.

The nozzle 100 may also include front wheels 117a and 117b that move during cleaning. The front wheels 117a and 117b may be rotatably disposed on the 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 111a, and may be provided rearward of the front opening 111 a.

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

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

The support member 119 may be provided with an extension 1192 extending to the rear thereof. The extension 1192 can be rotatably coupled to the rear wheel 118. In addition, the extension 1192 may support the first and second connection members 113a and 113b at lower sides thereof.

The rotation axis 118a of the rear wheel 118 may be disposed rearward with respect to the center 124a of the hinge shaft 124. This results in an increased stability of the housing, thereby preventing the housing 110 from tipping over during cleaning.

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

Fig. 12 is a view illustrating a state where a first side cover of the suction nozzle is 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 a rotation shaft of the rotary cleaning unit.

Referring to fig. 12 to 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 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 driving force and a motor support 141. The motor 143 may comprise a BLDC motor. A Printed Circuit Board (PCB)1432 for controlling the motor 143 may be provided at one side of the motor 143.

The motor 143 may be coupled to the motor support 141 by a coupling member such as a bolt. The motor 143 may be provided with a coupling hole 1434 for coupling with the motor support 141 using a bolt.

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

The motor 143 may be inserted into the gear part 145. For this purpose, a cavity may be formed in the gear portion 145. The gear portion 145 may be coupled to the motor support 141 by bolts. For this purpose, a coupling hole 1454 may be formed at one side of the gear portion 145. The gear portion 145 and the motor 143 may be integrally coupled to the motor support 141, thereby reducing vibration generated by the motor 143 during operation.

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

In addition, the inner circumferential surface of the motor supporter 141 is spaced apart from the PCB 1432 of the motor 143. Therefore, even when static electricity generated in the body part 111 is transferred to the driving unit 140, the static electricity is naturally discharged without reaching the PCB 1432 of the motor 143, so that the PCB 1432 of the motor 143 can be protected.

The motor supporter 141 is spaced apart from the inner circumferential surface of the first side cap 115. Therefore, a cooling flow path for cooling the driving unit 140 may be ensured.

The driving unit 140 may further include a cover 147 surrounding the gear portion 145. The cover 147 has a 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 rotary cleaning unit 130. The shaft 148 may transmit the driving force transmitted through the gear portion 145 to the rotary cleaning unit 130. Accordingly, the rotary cleaning unit 130 may rotate.

Drive unit 140 may also include a bearing 149 mounted on cover 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 the weight of the shaft 148 itself and a load applied to the shaft 48. Therefore, the shaft 148 can be smoothly rotated.

The shaft 148 includes a fixing member 1482 fixed to the rotary cleaning unit 130. Accordingly, the shaft 148 may rotate together with the rotary cleaning unit 130 in a fixed state. Accordingly, the shaft 148 may rotate the rotary cleaning unit 130 using the driving force transmitted by the motor 143 and the gear part 145.

Hereinafter, a configuration of the rotary cleaning unit 130 that can prevent static electricity from being transferred to a user will be described.

Fig. 15 is a conceptual diagram illustrating an example of the rotary cleaning unit 130.

The rotary cleaning unit 130 includes a nozzle body 131, a fiber layer 134, a fiber wire 132, and a metal wire 133.

The nozzle body 131 has a hollow cylindrical shape. The cavity 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 in the housing 110 (see fig. 2, etc.). The nozzle body 131 is provided on an inner circumferential surface thereof with at least one protrusion 131a, 131 b. When the rotary cleaning unit 130 is mounted in the housing, the protrusions 131a, 131b of the nozzle body 131 are engaged with the driving unit 140 (see fig. 13). 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 a 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 making a product having a predetermined sectional area by injecting a raw material and pressing it in one direction. On the other hand, plastic may be injected in the shape of the nozzle body 131. Injection refers to a molding method of making a product according to a mold shape by injecting 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, it is necessary to ensure minimum durability. The minimum thickness of the nozzle body 131 for ensuring minimum durability may vary depending on the material. Here, the thickness of the nozzle body 131 refers to a difference between an outer diameter and an inner diameter of the nozzle body.

Plastics are weaker than metals. Therefore, the minimum thickness of plastic for ensuring minimum durability should be greater than the minimum thickness of 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 applied to the motor 143 (see fig. 12) for rotating the nozzle body 131 also increases. In addition, the increased thickness of the nozzle body 131 causes an increase in material cost.

In this regard, the nozzle body 131 is preferably formed of a metal material rather than a plastic material. In particular, since an aluminum extruded product is light in weight and has sufficient strength among metals, 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, the rotary cleaning unit 130 may not be provided with the fiber layer 134 according to design, and in this case, the fiber wires 132 and the metal wires 133 may be directly coupled to the outer circumferential surface of the nozzle body 131.

The fiber wires 132 and the metal wires 133 are disposed on the outer circumferential surface of the nozzle body 131. The metal wires 133 are organic conductive fibers. The fiber filaments 132 and the wire 133 may be coupled to the nozzle body 131 or the fiber layer 134. Fig. 15 illustrates a configuration in which the fiber wires 132 and the metal wires 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 filaments 132 may be completely planted without any distinction or as a whole, and the metal filaments 133 may be sparsely planted between the fiber filaments 132. Subsequently, the number ratio or the area ratio between the fiber wires 132 and the metal wires 133 will be described.

The fiber wires 132 and the metal wires 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 wire 132 and the metal wire 133 are rotated together with the nozzle body 131. The fiber wires 132 and the metal wires 133 collide with the floor or the carpet so that debris, dust, etc. existing on the floor or the carpet can be swept away.

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 is generated due to friction during the collision. If the fiber wire 132 is provided only on the outer circumferential surface of the rotary cleaning unit 130 without the metal wire 133, static electricity is transmitted to the handle 13 (see fig. 1) or the user even along the cleaner body 10 (see fig. 1) or a line in the cleaner body 10.

However, when the wire 133 is disposed on the rotary cleaning unit 130 as exemplified in the present disclosure, the wire 133 having conductivity may allow static electricity generated from the fiber wire 132 to be discharged or eliminated therethrough. Since the wire 133 serves as a charging path connected to a floor or a carpet or to remove static electricity, the static electricity can be prevented from being transferred to a user. It was examined that when the rotary cleaning unit was provided with only the fiber wire 132 and no wire 133, the electrostatic capacity was about 8kV, and when the rotary cleaning unit was provided with both the fiber wire 132 and the wire 133, the electrostatic capacity was reduced to 1.6 kV.

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

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

In order to manufacture the rotary cleaning unit 130, the wire 133 must be manufactured first. These manufactured wires 133 should be planted on the nozzle body 131 or the fiber layer 134 together with the fiber wires 132.

Referring to fig. 16, in order to manufacture the metal wire 133, a very long fiber wire 133a is first prepared. The filaments 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 133 b. The conductive coating 133b may be formed of brass or covellite (Cu9S 5).

The average thickness of the conductive coating 133b is preferably 0.3 μm to 1.0 μm. The average thickness a of the conductive coating 133b refers to the remainder of the radius of the fiber filament 133a removed from the radius of the wire 133. If the average thickness of the conductive coating 133b is less than 0.3 μm, it is difficult to sufficiently prevent static electricity. This is because the wire 133 is not provided with sufficient conductivity. In contrast, if the average thickness of the conductive coating 133b exceeds 1.0 μm, friction with the floor or carpet to be cleaned excessively increases, making it difficult to smoothly perform cleaning.

Next, the fiber filament 133a with the conductive coating 133b is cut to have a length suitable for planting. Several (a bundle of) cut strands (a bunch, i.e., cut fiber filaments) are twisted together to completely form one wire 133.

Finally, the metal filaments 133 are planted on the fiber layer 134 together with the fiber filaments 132. The fiber yarn 132 planted together with the metal yarn 133 is formed by twisting a bundle of yarns. The fiber layer 134 is formed with a plurality of planting portions 135a, 135b in which the fiber wires 132 and the metal wires 133 are planted. The planting portions 135a, 135b are provided to be spaced apart from each other. Each planting portion 135a, 135b is provided with a hole 135a and a bridge 135b spanning the hole 135 a.

The apertures 135a of the planting portions 135a, 135b are divided into two parts by a bridge 135 b. When the fiber wire 132 and the wire 133 to be planted on one planting part 135a, 135b are inserted into one side hole to pass through the other side hole, the center of the fiber wire 132 and the center of the fiber wire 133 are at positions where they intersect with the bridge 135 b. Both ends of each of the fiber wire 132 and the metal wire 133 extend away from the center of the nozzle body 131.

The fiber wires 132 and the metal wires 133 are supported by the support 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 wire 132 and the center of the wire 133 may be fixed to the bridge 135b by the support 136.

The support 136 may determine the arrangement of the fiber wires 132 and the metal wires 133. For example, the support portion 136 may extend along a length direction of the nozzle body 131, along a circumferential direction of the nozzle body 131, or along a spiral direction of the nozzle body 131. Accordingly, the fiber wires 132 and the metal wires 133 are arranged to extend along the length, circumferential direction, or helical direction of the nozzle body 131.

When an object charged with positive (+) or negative (-) polarity is approaching, the wire 133 generates opposite charges of negative polarity or positive polarity and instantaneously neutralizes static electricity by corona discharge. The wire 133 has an effect of eliminating static electricity by corona discharge.

In addition, since the wire 133 includes the conductive coating 133b formed of the blue chalcocite, the wire 133 has antibacterial and deodorizing properties provided by the blue chalcocite. For example, the wire 133 has an antibacterial action against staphylococcus aureus, klebsiella pneumoniae, escherichia coli, pseudomonas aeruginosa, and the like.

In addition, the wire 133 has heat storage performance and electromagnetic wave absorption performance provided by the blue chalcocite. The heat storage property means absorbing sunlight or near infrared rays and converting them into heat 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 wires 133 is preferably in the range of 220 to 260 dTex. If the average thickness of the wires 133 is less than 220dTex, the wires 133 are sparsely arranged on the outer circumferential surface of the fiber layer 134, which may cause a reduction in cleaning performance. In addition, sealing cannot be sufficiently performed, and thus dust may be tangled between the wires 133. In contrast, when the average thickness of the wire 133 exceeds 260dTex, the wire 133 is closely adhered to the body part 111 (see FIG. 2) of the suction nozzle, thereby excessively increasing the load of the suction motor. In addition, friction with the floor or carpet to be cleaned is excessively increased, thereby making it difficult to smoothly perform cleaning.

Preferably, the number ratio of the metal wires 133 to the sum of the fiber wires 132 and the metal wires 133 is 2.5% or more. For example, if the sum of the number of the fiber wires 132 and the metal wires 133 is 200, the number of the metal wires 133 is preferably 5 or more. If the number ratio of the wires 133 is 2.5% or less, the function of preventing the transmission of static electricity or removing static electricity cannot be sufficiently realized. On the other hand, when the number ratio of the wires 133 is increased, the effect of preventing the transmission of static electricity or removing static electricity is improved, but the improvement is not large. In addition, when the number ratio of the wires 133 reaches 25%, the effect of preventing the static electricity from being transferred or removing the static electricity is saturated.

Both the fiber filaments 132 and the metal filaments 133 have a certain thickness. Therefore, although the planting parts 134a, 135b are spaced apart from each other, the fiber wires 132 and the metal wires 133 planted on the planting parts 135a, 135b cover the outer circumferential surface of the nozzle body 131. Since the fiber wires 132 and the metal wires 133 cover the outer circumferential surface of the nozzle body 131, the number ratio of the metal wires 133 almost coincides with the area ratio. Therefore, it is preferable that the area ratio of the wire 133 occupied on the outer circumferential surface of the nozzle body 131 is 2.5% or more. The technical meaning of the lower limit or saturation of the effect of preventing the transfer or removal of static electricity is replaced by the technical meaning mentioned above with respect to the quantity ratio.

The resistance of one strand (string) of the wire 133 is preferably 100k omega or less. The fact that the resistance of the wire 133 is not infinite means that the wire 133 has conductivity. However, if the resistance of one strand 133 of the wire 133 exceeds 100k Ω, the effect of preventing the transmission or removal of static electricity is deteriorated.

The surface resistance value of the rotary cleaning unit 130 including the wire 133 is preferably 1 × 10²To 1X 10³Omega/10 cm. In addition, the resistance coefficient value of the wire 133 is preferably 1 × 10^-1To 1X 10^-2Omega/10 cm. The meaning of the surface resistance value and the meaning of the resistance coefficient value are replaced by the description of the meaning of the resistance of the single wire 133.

The individual wires 133 preferably have a tensile strength of 3.5cN/dTex (hundredths of newtons per dTex) or greater. The tensile strength is a numerical value representing mechanical durability and reliability of the wire 133.

The tensile elongation of the single wire 133 is preferably 33% to 45%. When the rotary cleaning unit 130 rotates, the wires 133 are tangled with the carpet to be cleaned. Therefore, the wire 133 must have a tensile elongation value of 33% or more in order to perform cleaning while being entangled with the carpet to be cleaned. However, if the tensile elongation of the wires 133 exceeds 45%, only the length of some of the wires 133 on the rotary cleaning unit 130 may be excessively extended, so that an uneven outer circumferential surface may be formed, thereby causing deterioration in cleaning performance.

The specific gravity of the wire 133 may be 1.05 to 1.20g/cm³And the process moisture regain may be 4.5% or less. These conditions are to ensure the best effect of preventing the transmission or removal of static electricity and the best 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 belt portion 237 and an antistatic portion 238. The band portion 237 and the antistatic portion 238 are distinguished according to which one of the fiber wire 132 (see fig. 16) and the metal wire 133 (see fig. 16) is planted thereon.

The band 237 is provided with filaments 132. The wires 133 are not planted on the band portions 237.

The antistatic part 238 is provided with the fiber wires 132 and the metal wires 133. In the above-described number ratio and area ratio of the wires 133, each denominator is the sum of the belt portion 237 and the antistatic portion 238.

Referring to fig. 17, the band portion 237 extends along the longitudinal direction of the nozzle body 231. The plurality of band portions 237 are spaced apart from each other. The antistatic portion 238 is disposed between the belt portions 237. Each of the antistatic parts 238 extends along the length direction of the nozzle body 231, like the belt part 237. The antistatic parts 238 are spaced apart from each other.

The separations between the band portions 237 are equal to each other. In addition, the antistatic parts 238 are equally spaced from each other. The separation between the tape portion 237 and the antistatic portion 238 may be the same as or different from each other. The tape portion 237 and the antistatic portion 238 may further include a dye coating.

In fig. 17, unexplained reference numerals 231a and 231b denote protrusions, and 234 denotes a fiber layer.

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

The band portion 337 extends along the circumferential direction of the nozzle body 331. The plurality of belt portions 337 are spaced apart from each other. The antistatic portion 338 is disposed between the band portions 337. Each antistatic portion 238 also extends along the circumferential direction of the nozzle body 331 as with the band portion 337. The antistatic parts 338 are spaced apart from each other.

The width of the band portions 337 and the separation therebetween are equal to each other. In addition, the width of the antistatic parts 338 and the separation therebetween are equal to each other. The widths of the tape portion 337 and the antistatic portion 338 and the separation between the tape portion 337 and the antistatic portion 338 may be the same as or different from each other. The tape portion 337 and the antistatic portion 338 may further include a dye coating.

In fig. 18, unexplained reference numerals 331a and 331b denote protrusions, and 334 denote fiber layers.

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

The band part 437 extends in the spiral direction of the nozzle body 431. The plurality of band parts 437 are spaced apart from each other. The antistatic portion 438 is disposed between the band portions 437. Each antistatic portion 438 also extends in the spiral direction of the nozzle body 431, like the belt portions 437. The antistatic parts 438 are spaced apart from each other.

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

The width of the band portions 437 and the separation therebetween are equal to each other. In addition, the width of the antistatic parts 438 and the separation therebetween are equal to each other. The widths of the band parts 437 and the antistatic parts 438 and the separation between the band parts 437 and the antistatic parts 438 may be the same as or different from each other. The band portions 437 and the antistatic portions 438 may also include a dye coating.

In fig. 19, unexplained reference numerals 431a and 431b denote protrusions, and 434 denote fiber layers.

Hereinafter, another example of the suction nozzle 510 will be described.

Fig. 20 is a sectional view illustrating another example of the suction nozzle 510, and fig. 21 is an enlarged sectional view of a portion a of fig. 20.

The structure in which the driving unit 540 is provided with the brushless dc (bldc) motor and is disposed at one side of the rotary cleaning unit 530 has been described above. However, the driving unit 540 may be provided with a DC motor 543 instead of the BLDC motor. In particular, the DC motor 543 is advantageous in that it is cheaper than a BLDC motor.

If the size of the DC motor 543 is large, it may be insufficient in space to mount the DC motor 543 on one side of the rotary cleaning unit 530. In this case, as illustrated in fig. 20, the DC motor 543 may be installed inside (in the cavity) the nozzle body 531. The driving force generated by the DC motor 543 may be transmitted to the nozzle body 531 through the shaft 548, the gear 545, and the like.

A cover 547 may be formed to surround the DC motor 543 and the gear 545. The cover 547 is coupled to an outer periphery of the DC motor 543 and supports the DC motor 543.

A motor case 542 surrounding the DC motor 543, the gear 545, the cover 547, the shaft 548, and the like is formed. The DC motor 543, the gear 545, the cover 547, the shaft 548, and the like are accommodated in the motor case 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 (regardless of the shape or arrangement thereof) that rotatably supports the nozzle body 631.

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 for suppressing noise and scratch generation. Since the brackets 546a and 546b rotate together with the nozzle body 531, it is also understood that the rotary cleaning unit 530 includes the brackets 546a and 546 b.

The bearing portions 549a, 544 and the rotation support portion 550 illustrated in fig. 20 rotatably support the mouth body 531 so as to be incorporated into the concepts of the support members 549a, 544 and 550, respectively. Hereinafter, the bracket 546a provided between the bearing portions 549a, 544 and the nozzle body 531 and the bracket 546b provided between the rotation support portion 550 and the nozzle body 531 will be described in order. The two brackets 546a and 546b may be referred to as a first bracket 546a and a second bracket 546b to distinguish them from each other.

The bearing portions 549a, 544 are provided around the shaft 548, and rotate together with the shaft 548. Bearing portions 549a, 544 include a bearing 549a and a bearing cover 544.

The bearing portion 549a is provided around the shaft 548, and supports the rotating shaft 548. The bearing 549a is used to fix the shaft 548 at a predetermined position and rotate the shaft 548 while supporting the weight of the shaft 548 and the load of the shaft 48.

The bearing 549a may be installed at every position where the shaft 548 needs to be supported. Fig. 20 illustrates three bearings 549a, 549b, and 549c disposed about a shaft 548.

Bearing cover 544 protects bearing 549 a. Bearing cap 544 is mounted around bearing 549 a. However, no bearing cover 544 is provided for each bearing 549 a. For example, only some of the bearings 549a, 549b, and 549c may be provided with bearing caps 544.

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

The first bracket 546a is coupled to an end portion of the nozzle body 531 to suppress noise and scratches from being generated due to friction between the end portion of the nozzle body 531 and the bearing 549 a. The first bracket 546a is press-fitted into an end portion of the nozzle body 531 in a length 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 with an adhesive.

The first bracket 546a is disposed between the spout body 531 and the carrier cap 544. This is because the first bracket 546a can suppress generation of noise and scratches due to friction between the nozzle body 531 and the bearing cover 544.

The first bracket 546a is formed from 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 scratches due to friction between different materials can be suppressed. However, the same material does not mean exactly the same material.

When the first bracket 546a is coupled to the nozzle body 531, the first bracket 546a is in contact with the bearing portions 549a, 544. More specifically, the first bracket 546a is in surface contact with the outer circumferential surface of the bearing cover 544. Thus, the bearing cap 544 and the first bracket 546a are provided with mutual contact surfaces S1, S2. The mutual contact surfaces S1, S2 refer to at least one of a surface S1 (see fig. 21) of the bearing cap 544 that contacts the first bracket 546a and a surface S2 (see fig. 21) of the first bracket 546a that contacts the bearing cap 544.

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

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

From a three-dimensional point of view, the mutual contact surfaces S1, S2 may have a shape corresponding to the lateral surface of a truncated cone. In this case, the radius of the mutual contact surfaces S1, S2 may gradually increase from the center of the nozzle body 531 to the outside along the length direction. As the radius of the mutual contact surfaces S1, S2 gradually increases, the mutual contact surfaces S1, S2 are inclined with respect to the lengthwise direction of the nozzle body 531.

Brackets 546a and 546b may 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 so as to surround the rotation support portion 550 is formed.

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

The second bracket 546b is physically connected to a shaft 548, and the shaft 548 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 hole (not shown) corresponding to the shaft 548, and the shaft 548 may be inserted into the groove or hole.

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 546 b. The rotation support 550 may be fixed to rotate with respect to the nozzle body 531 or rotate together with the nozzle body 531. When the rotation support 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 support 550.

The rotation support 550 may be formed of an injection molded plastic material. Therefore, when the rotation support 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 support 550 and the mouth main body 531, the generation of noise and scratches can be suppressed. This is because the second bracket 546b is formed of the same material as that of the rotation support portion 550. However, the same material does not mean exactly the same material.

The second bracket 546b includes a nozzle body coupling portion 546b1, an extension portion 546b2, and a shaft coupling portion 546b 3.

The nozzle body coupling portion 546b1 is formed in a circular shape so as to be coupled to an end portion of the nozzle body 531. The nozzle body coupling portion 546b1 is formed in a shape to surround the inner and outer circumferential surfaces 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 546b2 extends from the spout body coupling portion 546b1 to the inside of the spout body 531 along the inner peripheral surface of the spout body 531. The extension 546b2 may contact the inner circumferential surface of the mouth body 531.

The extended portion 546b2 may press the inner peripheral surface of the nozzle body 531 in the radial direction (thickness direction from the inner peripheral surface to the outer peripheral surface). For example, if the distance between two opposite portions of the extension 546b2 (the distance including the thickness of the extension 546b 2) is larger than the inner diameter of the nozzle body 531, the two portions of the extension 546b2 may press the inner peripheral surface of the nozzle body 531 in the radial direction. Since the extension 546b2 presses the inner peripheral surface of the nozzle body 531, the second bracket 546b is prevented from being arbitrarily separated from the nozzle body 531.

The shaft coupling portion 546b3 extends from the extension portion 546b2 toward the shaft 548 to couple to the shaft 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 548 may be formed in the shaft coupling portion 546b 3. The shaft 548 may be inserted into a groove or hole and the driving force may be transmitted through the polygonal structure.

As described above, the nozzle main body 531 is provided with the protrusions 531a and 531b (see fig. 22). The protrusions 531a and 531b protrude from an inner circumferential surface of the nozzle body 531 and extend in a length direction of the nozzle body 531.

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

To prevent this, the extension 546b2 and the protrusions 531a and 531b of the second bracket 546b should contact 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 extension 546b2 presses the protrusions 531a and 531b in the rotational direction of the nozzle body 531, and thus the driving force can be transmitted finally. For this purpose, the protrusions 531a, 531b and the extension 546b2 must be located on the same plane. Here, the same plane refers to an inner circumferential surface of the nozzle body 531.

In fig. 20 and 21, unexplained reference numeral 515 denotes a side cover.

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

The nozzle body 531 of the rotary cleaning unit 530 is coupled to the first bracket 546 a. When the first bracket 546a is in surface contact with 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 546a 3.

The nozzle body coupling portion 546a1 is formed in a circular shape so as to be coupled to an end portion of the nozzle body 531. The nozzle body coupling portion 546a1 is formed to surround the inner and outer circumferential surfaces 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 546a2 extends from the nozzle body coupling portion 546a1 to the inside of the nozzle body 531 along the inner peripheral surface of the nozzle body 531. The extension 546a2 may contact the inner circumferential surface of the nozzle body 531.

A plurality of extensions 546a2 may be provided. For example, fig. 22 exemplarily illustrates that the first bracket 546a is provided with four extensions 546a 2. Each of the extended portions 546a2 may press the inner peripheral surface of the nozzle body 531 in the radial direction (thickness direction from the inner peripheral surface to the outer peripheral surface).

When the distance between the opposing extensions 546a2 (the distance including the thickness of the extension 546b 2) is larger than the inner diameter of the nozzle body 531, the two extensions 546b2 may press the inner circumferential surface of the nozzle body 531 in the radial direction. Since the two extension portions 546a2 press the inner peripheral surface of the nozzle body 531, the first bracket 546a can be prevented from being arbitrarily separated from the nozzle body 531.

The structure in which the extension 546a2 contacts the protrusions 531a and 531b of the nozzle body 531 so as to press the protrusions 531a and 531b in the rotational direction is also applicable to the second bracket 546 b.

The surface contact portion 546a3 protrudes from the inner peripheral surface of the nozzle body coupling portion 546a 1. Surface contact portion 546a3 is in surface contact with bearing portions 549a, 544 to support rotation of shaft 548 and 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 546a 3. Therefore, the description is used instead of the description of the structure of the surface contact portion 546a3 formed to be inclined or extended to the outside.

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 546a 3. 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, while the surface contact 546a3 is not a closed curve.

The extension portions 546a2 and the surface contact portions 546a3 may be alternately arranged to evenly distribute the force applied to the surface contact portions 546a3 in response to supporting the nozzle body 531 and the force required to prevent the first support 546a from being arbitrarily separated from the nozzle body 531 to the first support 546 a.

In fig. 22, unexplained reference numeral 534 denotes a fiber layer, 537 denotes a tape portion, and 538 denotes an antistatic portion.

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

[ Industrial Applicability ]

The present disclosure is applicable to industries related to vacuum cleaners.

Claims

1. A vacuum cleaner, characterized in that the vacuum cleaner comprises:

a cleaner main 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 housing; and

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 includes:

a nozzle body rotatably coupled to an interior of the housing, the nozzle body having a cylindrical shape; and

a plurality of filaments and a plurality of wires, the plurality of filaments and the plurality of wires are disposed on an outer peripheral surface of the nozzle main body.

2. The vacuum cleaner of claim 1, wherein each wire comprises:

fiber yarn; and

a conductive coating disposed on an outer peripheral surface of the fiber filament.

3. The vacuum cleaner of claim 2, wherein the conductive coating comprises brass or covellite (Cu9S 5).

4. The vacuum cleaner of claim 2, wherein the conductive coating has an average thickness of 0.3 to 1.0 μ ι η.

5. The vacuum cleaner of claim 1, wherein the plurality of wires have an average thickness of 220 to 260 decitex (dTex).

6. The vacuum cleaner of claim 1, wherein a ratio of the number of the plurality of wires to a total number of the plurality of fiber wires and the plurality of wires is greater than or equal to 2.5%.

7. The vacuum cleaner of claim 1, wherein a ratio of an area of the plurality of wires to a total area of the outer peripheral surface of the nozzle body is greater than or equal to 2.5%.

8. The vacuum cleaner of claim 1, wherein an electrical resistance of an individual wire of the plurality of wires is less than or equal to 100k Ω.

9. The vacuum cleaner of claim 1, wherein individual wires of the plurality of wires have a tensile strength greater than or equal to 3.5 hundredths of a newton per decitex (cN/dTex).

10. The vacuum cleaner of claim 1, wherein a tensile elongation of an individual wire of the plurality of wires corresponds to 33% to 45% of a length of the individual wire.

11. The vacuum cleaner of claim 1, wherein the rotary cleaning unit has a surface resistance value of 1 x 10²To 1X 10³Ω/10cm。

12. The vacuum cleaner of claim 1, wherein the plurality of wires have a resistivity value of 1 x 10^-1To 1X 10^-2Ω/10cm。

13. The vacuum cleaner of claim 1, wherein the rotary cleaning unit further comprises:

a fiber layer surrounding the outer peripheral surface of the nozzle body; and

a support configured to support the plurality of fiber wires and the plurality of metal wires,

wherein the fiber layer includes a plurality of planting portions spaced apart from one another, each planting portion configured to receive a portion of the plurality of fiber filaments and a portion of the plurality of metal filaments,

wherein each planting portion comprises an aperture and a bridge spanning the aperture,

wherein each fiber wire comprises a bundle of wires wound around each other and each metal wire comprises a bundle of wires wound around each other,

wherein the center of each fiber wire and the center of each wire are coupled to the bridge,

wherein an end of each fiber wire and an end of each metal wire extend outward from a center of the nozzle body, and

wherein the support portion includes an adhesive cured between the nozzle body and the fiber layer, the support portion extending in at least one of a length direction of the nozzle body, a circumferential direction of the nozzle body, or a spiral direction of the nozzle body.

14. The vacuum cleaner of claim 1, wherein the rotary cleaning unit comprises:

a webbing portion including the plurality of filaments; and

an antistatic part including both the plurality of fiber wires and the plurality of metal wires, and

wherein the band portion and the antistatic portion each extend in at least one of a length direction of the nozzle body, a circumferential direction of the nozzle body, or a spiral direction of the nozzle body.

15. A vacuum cleaner, characterized in that the vacuum cleaner comprises:

a cleaner main 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 housing; and

a rotary cleaning unit located inside the housing, configured to rotate relative to the housing, and including a nozzle body rotatably coupled to the inside of the housing, at least a portion of the rotary cleaning unit being exposed through the opening of the housing,

a support member configured to be inserted into at least one end portion of the nozzle body and configured to rotatably support the nozzle body, the support member containing a material different from that of the nozzle body, and

a bracket configured to be coupled to the at least one end portion of the nozzle body and configured to contact the support member, and

wherein a contact surface between the support member and the supporter is inclined with respect to a length direction of the nozzle body.

16. The vacuum cleaner of claim 15, further comprising a shaft located inside the nozzle body and extending in the length direction of the nozzle body,

wherein the support member includes:

a bearing surrounding the shaft, an

A bearing cap that surrounds the bearing and contains a material different from that of the nozzle body, and

wherein the bracket is located between the nozzle body and the bearing cap.

17. 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 portion of the nozzle body;

an extension protruding from the mouth body coupling portion toward the mouth body and further extending into the mouth body along an inner peripheral surface of the mouth body; and

a surface contact portion protruding from an inner circumferential surface of the nozzle body coupling portion and configured to contact the bearing cap, and

wherein the extension portions and the surface contact portions are alternately arranged along the inner peripheral surface of the nozzle body coupling portion.

18. The vacuum cleaner of claim 15, wherein the suction nozzle includes a side cover configured to cover the at least one end portion of the nozzle body,

wherein the support member includes a rotation support portion coupled to the side cover of the suction nozzle, configured to be inserted into the at least one end portion of the nozzle body, and configured to rotatably support the nozzle body, and

wherein the holder is located between the nozzle body and the rotation support.

19. The vacuum cleaner of claim 18, further comprising:

a driving unit configured to generate a force for rotating the nozzle body; and

a shaft located inside the nozzle body, extending in the length direction of the nozzle body, and configured to transmit a force from the driving unit to the nozzle body,

wherein, the support includes:

a shaft coupling portion extending from the extension toward the shaft and configured to be coupled to the shaft.

20. The vacuum cleaner of claim 15, wherein the nozzle body includes a protrusion protruding from an inner peripheral surface of the nozzle body,

wherein the protrusion extends along the length direction of the nozzle body, and

wherein the stand is configured to contact the protrusion and provide pressure to the protrusion in a rotational direction of the nozzle body.