KR20180118026A - Vacuum cleaner - Google Patents

Abstract

According to the present invention, a vacuum cleaner, comprising: a cleaner main body having an inner suction motor and having an outer handle; and a suction nozzle connected to the cleaner main body. The suction nozzle comprises: a housing of which at least a portion of a front side is opened; and a rotary cleaning unit installed inside the housing, of which at least a portion is exposed through the opened portion of the housing, and formed to clean a floor surface by rotation. The rotary cleaning unit comprises: a cylindrical nozzle body installed to be rotated inside the housing; and fiber wool and metal wool disposed on the outer circumferential surface of the nozzle body.

Description

Vacuum cleaner {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.

A vacuum cleaner refers to a device that sucks dust and air by using a suction force generated from a suction motor mounted inside the cleaner body, and separates and collects dust from the air.

Such a vacuum cleaner is divided into a canister cleaner, an upright cleaner, a stick cleaner, a handy cleaner, and a robot cleaner. In the case of the canister cleaner, a suction nozzle for suctioning dust is provided separately from the cleaner main body, and the cleaner main body and the suction nozzle are connected to each other by the connecting device. In the case of the upright cleaner, the suction nozzle is rotatably connected to the cleaner main body. In the case of the stick cleaner and the handy cleaner, the user uses the cleaner body while holding it by hand. However, in the case of the stick cleaner, the suction motor is disposed close to the suction nozzle (lower center), and in the case of the handy vacuum cleaner, the suction motor is disposed close to the grip (upper center). The robot cleaner runs itself by self-running system and performs cleaning by itself.

The suction nozzle refers to a portion that touches the floor and directly sucks dust and air. The suction force generated in the suction motor mounted inside the cleaner main body is transmitted to the suction motor, and the suction force sucks dust and air into the suction nozzle.

The suction nozzle is equipped with a rotary cleaning unit (or an agitator). The rotating sweeper scatters the dust in the floor or carpet while rotating to improve the cleaning performance. A brush is attached to the rotary cleaning part, which causes friction with the floor or carpet.

When the sole rubs against the floor, a static electricity due to friction naturally occurs. Especially, when the brush is in contact with the carpet, the frequency of the static electricity increases.

The problem is that the generated static electricity is transmitted to the user by riding on the cleaner main body or wires. Especially, in the case of the stick cleaner or the handy cleaner, since the user grasps the cleaner main body, there is a possibility that the static electricity is directly transmitted to the user.

Among the prior art documents, Korean Patent Laid-Open Publication No. 10-2012-0027357 (March 21, 2012) and the like disclose configurations for preventing generation or transmission of static electricity. However, since the above-mentioned patent simply defines the physical properties of the filament only as sheet resistance, there is a limit to be practically applied to a vacuum cleaner.

Korean Patent Laid-Open Publication No. 10-2012-0027357 (March 21, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention 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 in cleaning performance or overload of the suction motor due to an antistatic structure.

Another object of the present invention is to provide a vacuum cleaner having a structure capable of enhancing the reliability of the anti-static structure.

The vacuum cleaner of the present invention includes a rotary cleaning unit configured to clean the bottom surface by a rotating operation. The rotary cleaning unit includes a rotatable nozzle body, and a fiber fin and a metal fin disposed on an outer circumferential surface of the nozzle body.

The vacuum cleaner includes a vacuum cleaner main body having a suction motor inside and a handle on the outside; And a suction nozzle connected to the cleaner main body.

The suction nozzle includes a housing at least a part of which is opened, and the rotation cleaning part is installed inside the housing, and at least a part of the rotation cleaning part is exposed through an open part of the housing.

The nozzle body is rotatably installed inside the housing and has a cylindrical shape.

Wherein the metal moiety is a fiber moiety; And a conductive coating layer coated on an outer circumferential surface of the fiber simulator.

The conductive coating layer is formed of brass or digenite (Cu ₉ S ₅ ).

The average thickness of the conductive coating layer is 0.3 to 1.0 mu m.

The average thickness of the metal foil is 220 to 260 dTex (deci-Tex).

And the ratio of the number of the metal microstructures to the sum of the metal microstructures and the metal microstructures is at least 2.5%.

The area ratio of the metal fins on the outer peripheral surface of the nozzle body is at least 2.5%.

The electrical resistance of the metal strands is 100 k? Or less.

The tensile strength of the metal sheath is not less than 3.5 cN / dTex (centi Newton / deci-Tex).

The tensile elongation of the metal aggregate is 33 to 45%.

The surface cleaning value of the rotary cleaning part is 1 × 10 ² to 1 × 10 ³ Ω / 10 cm.

The resistivity of the metal foil is 1 x 10 < ^-1 > to 1 x 10 < ^-2 >

The fiber wool and the metal wool are each formed by twisting a bundle.

Wherein the rotary cleaning unit further comprises a fiber layer formed so as to surround an outer circumferential surface of the nozzle body, wherein the fibrous layer is formed with a plurality of flocked portions that are capable of flocking the fiber wool and the metal wool, Lt; / RTI > bridge.

The center of the fiber simulation and the center of the metal simulation are fixed to the bridge, and both ends of the fiber simulation and the metal simulation extend in a direction away from the center of the nozzle body.

The rotary cleaning unit may further include a supporting portion formed to support the fiber wool and the metal wool, and the supporting portion is disposed between the nozzle body and the fiber layer and is formed by curing the adhesive.

The support portion extends along a longitudinal direction, a circumferential direction, or a spiral direction of the nozzle body.

Wherein the rotary cleaning unit comprises: a strap part composed of the fiber strands; And an antistatic portion composed of the fiber wool and the metal wool.

The strap portion and the anti-static portion extend along a longitudinal direction, a circumferential direction, or a spiral direction of the nozzle body.

The strap portion and the anti-static portion have the same width.

The nozzle body is formed of an extruded metal material.

The metal material includes aluminum.

Wherein the suction nozzle includes: a support member inserted into at least one end of the nozzle body to rotatably support the nozzle body, the support member being formed of a material different from that of the nozzle body; And a bracket coupled to an end of the nozzle body and in surface contact with the support member.

The mutual contact surfaces of the support member and the bracket are formed to be inclined with respect to the longitudinal direction of the nozzle body.

The support member includes: a bearing installed around a shaft extending along a longitudinal direction of the nozzle body; And a bearing cover formed to surround the bearing and formed of a material different from the nozzle body, and the bracket is disposed between the nozzle body and the bearing cover.

Wherein the bracket includes: a nozzle body coupling portion having a circular shape to be engageable with an end portion of the nozzle body; An extension extending from the nozzle body coupling part to the inside of the nozzle body along the inner circumferential surface of the nozzle body; And a surface contact portion protruding from the inner circumferential surface of the nozzle body engagement portion and in surface contact with the bearing cover.

The extending portion and the surface contacting portion are alternately arranged.

Wherein the support member includes a rotation support coupled to a side cover of the suction nozzle and inserted into one end of the nozzle body to rotatably support the nozzle body, Respectively.

Wherein the bracket includes a nozzle body engaging portion formed in a circular shape so as to be engageable with an end portion of the nozzle body; An extension extending from the nozzle body coupling part to the inside of the nozzle body along the inner circumferential surface of the nozzle body; And a shaft coupling portion extending from the extension portion toward the shaft so as to be coupled to a shaft that transmits the driving force generated from the driving portion to the nozzle body.

Wherein the nozzle body has a protrusion protruding from the inner circumferential surface of the nozzle body, the protrusion extending along the longitudinal direction of the nozzle body, the bracket contacting the protrusion so as to press the protrusion in the rotational direction of the nozzle body, do.

According to the present invention having the above-described structure, the metallic wool included in the rotary cleaning part serves as a charging passage for neutralizing static electricity generated in the fiber wool. Therefore, the static electricity generated in the metal wool can be discharged or de-energized through the metal wool before being transmitted to the user.

In addition, the present invention can provide an optimal average thickness of the conductive coating layer or an optimum average thickness of the metal foil, thereby preventing the cleaning performance due to the anti-static structure or the surplus portion of the suction motor.

Further, the present invention can provide the optimum physical property value of the metal model to improve the reliability of the antistatic structure.

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.
Fig. 4 is a side view of the suction nozzle of Fig. 1; Fig.
Fig. 5 is a front view of the suction nozzle of Fig. 1; Fig.
FIG. 6 is a view showing a state in which the rotary cleaning unit is removed from the suction nozzle of FIG. 5;
7 is a bottom view of the suction nozzle of Fig.
Fig. 8 is an exploded perspective view of the suction nozzle of Fig. 1; Fig.
9 is an exploded perspective view of the housing.
10 is a sectional view of the suction nozzle cut along the line I-I of FIG.
11 is a cross-sectional view taken along the line II-II of FIG.
12 is a view showing a state in which the first side cover of the suction nozzle is removed.
13 is an exploded perspective view of the driving unit.
FIG. 14 is a cross-sectional view of the driving part cut along the rotation axis of the rotary cleaning part. FIG.
15 is a conceptual view showing an example of a rotary cleaning unit.
16 is a concept showing a manufacturing process of the rotary cleaning part.
17 is a concept showing another example of the rotation cleaning unit.
18 is a conceptual view showing still another example of the rotation cleaning unit.
FIG. 19 is a conceptual view showing still another example of the rotary cleaning unit.
20 is a sectional view showing another example of the suction nozzle.
21 is an enlarged cross-sectional view of portion A of Fig.
22 is a conceptual view of a first cleaning unit and a first cleaning unit coupled to the cleaning unit.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be " connected, " " coupled, " or " connected. &Quot;

1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention.

1, a vacuum cleaner 1 according to an embodiment of the present invention includes a vacuum cleaner body 10 having a suction motor (not shown) for generating a suction force therein, And an extension pipe 17 connecting the vacuum cleaner main body 10 and the suction nozzle 100.

Although not shown, the suction nozzle 100 may be directly connected to the cleaner main body 10 without the extension pipe 17.

The cleaner main body 10 may include a dust container 12 storing dust separated from the air. Accordingly, the dust introduced through the suction nozzle 100 can be stored in the dust container 12 through the extension pipe 17.

A handle 13 may be provided on the outer side of the cleaner main body 10 for holding the user. The user can perform the cleaning while gripping the handle 13.

The cleaner main body 10 is provided with a battery (not shown), and the cleaner main body 10 may include a battery receiving portion 15 in which the battery (not shown) is received. The battery receiving portion 15 may be provided at a lower portion of the handle 13. The battery (not shown) may be connected to the suction nozzle 100 to supply power to the suction nozzle 100.

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

Fig. 2 is a perspective view of the suction nozzle of Fig. 1, Fig. 3 is a top 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. 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 suction nozzle of Fig. 10 is a cross-sectional view of the suction nozzle cut along the line I-I 'in FIG. 7, and FIG. 11 is a cross-sectional view taken along line II-II' in 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 in which a chamber 112 is formed. The main body 111 may have a front opening 111a for sucking air containing contaminants. The air introduced through the front opening 111a by the suction force generated in the cleaner main body 10 can be moved to the connection pipe 120 through the chamber 112. [

The front opening 111a extends in the left and right direction of the housing 110 and extends to the front of the housing 110 as well as the bottom of the housing 110. [ Accordingly, since the suction area can be sufficiently secured, it is possible to evenly clean the floor surface to the portion adjacent to the wall surface.

The housing 110 may further include an inner pipe 1112 communicating with the front opening 111a. External air can be moved to the internal flow path 1112a of the internal pipe 1112 through the front opening 111a by the suction force generated in the cleaner main body 10. [

The housing 110 may further include a driving unit 140 for providing power for rotating the rotary cleaning unit 130. The driving unit 140 may be inserted into one side of the rotary cleaning unit 130 to transmit power to the rotary cleaning unit 130. The driving unit 140 will be described in detail with reference to FIG.

The rotary cleaning unit 130 may be accommodated in the chamber 112 of the main body 111. At least a part of the rotary cleaning unit 130 may be exposed to the outside through the front opening 111a. The rotary cleaning unit 130 rotates by the driving force transmitted through the driving unit 140 and rubs against the floor surface, thereby removing contaminants. In addition, the outer circumferential surface of the rotary cleaning unit 130 may be formed of a woven fabric or a felt material. Accordingly, foreign substances such as dust accumulated on the bottom surface of the rotary cleaning unit 130 can be effectively removed by being inserted into the outer circumferential surface of the rotary cleaning unit 130.

The main body 111 may cover at least a part of the upper side of the rotary cleaning part 130. The inner circumferential surface of the main body 111 may have a curved shape corresponding to the outer circumferential surface of the rotary cleaning unit 130. Accordingly, the main body 111 can perform the function of preventing the foreign matter shaken from the floor from rising by rotating the rotary cleaning part 130.

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

The side covers 115 and 116 include a first side cover 115 provided at one side of the rotary cleaning unit 130 and a second side cover 116 provided at the other side of the rotary cleaning unit 130. The driving unit 140 may be fixed to the first side cover 115.

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

The rotary cleaning unit 130 may rotate in a counterclockwise direction with reference to the sectional view of FIG. That is, the rotary cleaning unit 130 rotates so as to push toward the inner pipe 1112 at a point of contact with the bottom surface. Accordingly, the foreign matter shaken from the bottom surface of the rotary cleaning unit 130 is moved toward the internal pipe 1112, and is sucked into the internal pipe 1112 by the suction force. Cleaning efficiency can be improved by rotating the rotary cleaning unit 130 backward with respect to the contact point with the floor surface.

The chamber 112 may be provided with a partition member 160. The partition member 160 may extend from the upper side of the chamber of the housing 110 downward.

The partition member 160 may be provided between the rotary cleaning unit 130 and the inner pipe 1112. The partitioning member 160 is divided into a first region 112a in which the rotary cleaning unit 130 is provided and a second region 112b in which the inner pipe 1112 is provided Can be divided. 10, the first region 112a may be provided at a front portion of the chamber 212, and the second region 112b may be provided at a rear portion of the chamber 212. As shown in FIG.

The partition member 160 may include a first extending wall 161. The first extension wall 161 may extend to contact at least a part of the rotary cleaning unit 130. Accordingly, when the rotary cleaning unit 130 rotates, the first extending wall 161 rubs against the rotary cleaning unit 130 to remove foreign matter adhering to 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 rotation cleaning unit 130 may be formed along the rotation axis direction of the rotation cleaning unit 130. Accordingly, the first extension wall 161 not only removes foreign matter adhering to the rotary cleaning unit 130 but also prevents foreign substances on the floor from flowing into the first region 112a of the chamber 112 have. Foreign matter is prevented from flowing into the first region 112a of the chamber 112 and foreign matter is discharged to the front of the housing 110 through the front opening 111a by the rotation of the rotary cleaning unit 130, Can be prevented.

The first extension wall 161 prevents the hair or the thread attached to the rotary cleaning unit 130 from flowing into the first area 112a of the chamber 112, It is possible to prevent the hair or the yarn from being wound around. That is, the first extending wall 161 may perform an anti-tangle function.

The partition member 160 may further include a second extending wall 165. The second extending wall 165 may extend to contact at least a part of the rotary cleaning part 130, like the first extending wall 161. Accordingly, when the rotary cleaning part 130 rotates, the second extending wall 165 rubs against the rotary cleaning part 130 like the first extended wall 161, and the foreign matter attached to the rotary cleaning part 130 . The second extending wall 165 has the same function as the first extending wall 161 and the first extending wall 161 without the second extending wall 165 allows the rotation cleaning unit 130 So that the second extending wall 165 may not be included in the structure of the housing 110. In this case,

The second extending wall 165 may be disposed above the first extending wall 161. Accordingly, the second extending wall 165 has a function of secondarily separating foreign matter not separated by the first extending wall 161 from the rotary cleaning unit 130.

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

A plurality of suction passages F1, F2 and F3 are formed in the main body 111 of the suction nozzle 100 to allow external air to move to the internal piping of the main body 111. [

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

The lower flow path F1 is formed on 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 through the lower side of the rotary cleaning unit 130 and the second region 112b.

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

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. As shown in FIG.

A first lower groove 161a may be formed in the first extending wall 161 and a first upper groove 165a may be formed in the second extending wall 165 to form the first upper flow path F2. May be formed.

The first lower groove 161a is formed by recessing the inner circumferential surface of the first extension wall 161, that is, a part of the surface of the first lower groove 161a which abuts the rotation cleaning part 130. [ In addition, the first lower groove 161a may extend along the circumferential direction of the rotary cleaning unit 130.

The first upper groove portion 165a is formed by recessing an inner circumferential surface of the second extending wall 165, that is, a portion of a surface contacting the rotation cleaning portion 130. Also, the first upper groove portion 165a may extend along the circumferential direction of the rotary cleaning unit 130.

The first lower groove portion 161a is connected to the first upper groove portion 165a and the first upper flow channel F2 is formed along the first lower groove portion 161a and the first upper groove portion 165a . If the second extending wall 165 is not provided in the suction nozzle 100, the first upper flow path F2 may be formed only by the first lower groove 161a.

The first lower groove portion 161a and the first upper groove portion 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 driving unit 140 may be configured to surround the driving unit 140, 0.0 > F2. ≪ / RTI >

The width A in the left-right direction of the first lower groove portion 161a and the first upper groove portion 165a may be equal to each other as illustrated, but the present invention is not limited thereto. The width A of the first lower groove portion 161a and the first upper groove portion 165a in the transverse direction may be a predetermined size. When the width A in the lateral direction is small, the width of the first upper flow path F2 is narrowed, so that the amount of air flow may be small or the flow of air may be interrupted, so that the cooling performance of the driving unit 140 may be insignificant have. On the contrary, when the width A in the left-right direction is large, the flow amount of the air can be increased because the width of the first upper flow path F2 is increased. However, The anti-tangle function of the hair of the rotation cleaning unit 130 by the cleaning unit 165 may be degraded. Therefore, the width A in the lateral direction should be an appropriate size, and may be formed to have a smaller width than the length of the driving unit. For example, the width A of the first upper groove portion 165a in the left-right direction may be 5 to 10 mm, but the present invention is not limited thereto.

11, the distance between the inner peripheral surface of the chamber 112 and the upper side of the rotary cleaning unit 130 in the first upper flow path F2 may become narrower toward the inner side of the chamber 112 . Specifically, the 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 top groove portion 165a, And d3 in the lower trench 161a. And has a smaller value 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. Due to such a feature, the flow velocity of the air can be reduced in the upper side of the rotary cleaning unit 130 toward the front opening 111a, so that foreign matter is discharged forward by the rotation of the rotary cleaning unit 130 The phenomenon can be suppressed.

Next, the second upper flow path F3 will be described. A second lower groove 161b is formed in the first extending wall 161 and a second upper groove 165b is formed in the second extending wall 165 to form the second upper flow path F3. .

The second lower groove 161b is formed at a position adjacent to the second side cover 116 on the inner circumferential surface of the first extending wall 161, The second lower groove 161b is different from the first lower groove 161a at a position where the second lower groove 161b is formed, and the remaining components are substantially the same.

The second upper groove portion 165b is formed at a position adjacent to the second side cover 116 on the inner circumferential surface of the second extending wall 165, The second upper groove portion 165b is connected to the second lower groove portion 161b and the second upper flow channel F3 is formed along the second lower groove portion 161b and the second upper groove portion 165b do. Meanwhile, when the suction nozzle 100 is not provided with the second extending wall 165, the second upper flow path F3 may be formed only by the second lower groove 161b.

The second lower groove portion 161b and the second upper groove portion 165b may be formed to surround the rotation support portion 150. [ Accordingly, the second upper flow path F3 may be formed along the periphery of the rotation support part 150, and the rotation support part 150 may be cooled by the air flowing along the second upper flow path F3, .

The width A in the transverse direction of the second lower groove 161b and the second upper groove 165b may be equal to each other as shown in the drawing, but the present invention is not limited thereto. The width A of the second lower groove 161b in the left and right direction and the width A of the second upper groove 165b in the left and right direction are set to be equal to each other in the width direction between the first lower groove 161a and the first upper groove 165a (A) in the left-right direction.

The 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 decreases toward the inner side of the chamber 112 as in the first upper flow path F2 Can be narrowed. A detailed description thereof will be omitted.

The partition member 160 may further include a third extending wall 163 that engages with the first extending wall 161. And may be coupled to the back surface of the first extending wall 161 to support the first extending wall 161. The first extension wall 161 and the second lower groove 161b are formed in the first extension wall 161 so that the third extension wall 163 is formed in the first region 112a of the chamber 112, May be exposed.

The housing 110 is provided with a first flow path F2 provided on the upper side of the rotary cleaning unit 130 as well as a lower flow path F1 provided on the lower side of the rotary cleaning unit 130, The rotation of the rotary support part 150 can be efficiently performed by providing the second upper flow path F3.

The connection pipe 120 may connect the extension pipe 17 (see FIG. 1) to the housing 110. That is, one side of the connection pipe 120 is connected to the housing 110, and the other side of the connection pipe 120 is connected to the extension pipe 17.

The connection pipe 120 may be provided with a detachable button 122 for operating mechanical coupling with the extension pipe 17. The user can engage or disengage the connection pipe 120 and the extension pipe 17 by operating 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 rotatable up and down.

The housing 110 may be provided with connecting members 113a and 113b for hinging the connecting pipe 120. [ The connection members 113a and 113b may be formed to surround the inner pipe 1112. [ The connection members 113a and 113b may include a first connection member 113a and a second connection member 113b which are directly connected to the connection pipe 120. [ One side of the second linking member 113b may engage with the first linking member 113a and the other side of the second linking member 113b may engage with the main body 111. [

8, a hinge hole 114 is formed in the first connection member 113a and a hinge shaft 124 inserted in the hinge hole 114 may be provided in the connection pipe 120 have. However, a hinge hole may be formed in the connection pipe 120 and a hinge shaft may be formed in the first connection member 113a. The hinge hole 114 and the hinge shaft 124 may collectively be referred to as a " hinge portion ".

The center 124a of the hinge shaft 124 may be disposed above the center axis C of the first linking member 113a. Accordingly, the rotation center of the connection pipe 120 may be formed above the center axis C of the first connection member 113a.

The first linking member 113a may be rotatably connected to the second linking member 113b. Specifically, the first linking member 113a can rotate about the longitudinal axis.

The suction nozzle 100 may further include an auxiliary hose 123 connecting the connection pipe 120 and the internal pipe 1112 of the housing 110. 1) through the auxiliary hose 123, the connection pipe 120, and the extension pipe 17 (see FIG. 1), so that the air sucked into the housing 110 passes through the auxiliary hose 123, . ≪ / RTI >

The auxiliary hose 123 may be made of a flexible material so that the connection pipe 120 can be rotated. In addition, the first connection member 113a may be formed to cover at least a part of the auxiliary hose 123 to protect the auxiliary hose 123.

The suction nozzle 100 may further include front wheels 117a and 117b for movement during cleaning. The front wheels 117a and 117b may be rotatably mounted on the bottom surface of the housing 110. [ The front wheels 117a and 117b may be disposed on both sides of the front opening 111a and may be disposed behind the front opening 111a.

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

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

The supporting member 119 may be provided with an extending portion 1192 extending backward. The rear wheel 118 may be rotatably coupled to the extended portion 1192. In addition, the extension 1192 can support the first connection member 113a and the second connection member 113b from the lower side.

The rotational axis 118a of the rear wheel 118 may be disposed behind the center 124a of the hinge shaft 124. [ Accordingly, since the stability of the housing 110 is improved, overturning of the housing 110 during cleaning can be prevented.

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

FIG. 12 is a view showing a state where the first side cover of the suction nozzle is removed, FIG. 13 is an exploded perspective view of the driving part, and FIG. 14 is a sectional view of the driving part cut along the rotation axis of the rotary cleaning part.

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

The driving unit 140 includes a motor 143 and a motor supporter 141 for generating a driving force. The motor 143 may include a BLDC motor. A printed circuit board (PCB) 1432 for controlling the motor 143 may be provided on one side of the motor 143.

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

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

The motor 143 may be inserted into the gear portion 145. For this purpose, a hollow may be formed inside the gear portion 145. The gear portion 145 may be bolted to the motor supporter 141, and a coupling hole 1454 may be formed at one side of the gear portion 145. The gear portion 145 and the motor 143 are fastened to the motor supporter 141 so that the gear 143 and the motor 143 are integrated to reduce the occurrence of vibration during operation of the motor 143. [

The motor supporter 141 may be made of polycarbonate. The polycarbonate material is characterized by high insulation and impact resistance. Therefore, the motor supporter 141 is resistant to external impact, and it is possible to reduce the transmission of static electricity generated from the outside to the motor 143.

The inner circumferential surface of the motor supporter 141 is spaced apart from the PCB 1432 of the motor 143. Accordingly, even when static electricity generated in the main body 111 is transmitted to the driving unit 140, static electricity can be discharged naturally without reaching the PCB 1432 of the motor 143, To protect the PCB 1432 of FIG.

The motor supporter 141 is spaced apart from the inner circumferential surface of the first side cover 115. Accordingly, a cooling channel for cooling the driving unit 140 can be secured.

The driving unit 140 may further include a cover unit 147 surrounding the gear unit 145. The cover portion 147 has a function of protecting the gear portion 145.

The driving unit 140 further includes a shaft 148 connected to the gear unit 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 rotation cleaning unit 130 can be rotated.

The driving unit 140 may further include a bearing 149 mounted on the cover unit 147. The bearing 149 is connected to the shaft 148 to fix the shaft 148 at a predetermined position and supports the shaft 148 while supporting the self weight of the shaft 148 and the load applied to the shaft 148. [ . As a result, the shaft 148 can smoothly rotate.

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

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

FIG. 15 is a conceptual view showing an example of the rotation cleaning unit 130. FIG.

The rotary cleaning unit 130 includes a nozzle body 131, a fiber layer 134, a fiber wool 132, and a metal wool 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 installed inside the housing 110 (see Fig. 2, etc.). The nozzle body 131 has at least one protrusion 131a and 131b on its inner circumferential surface. The protrusions 131a and 131b of the nozzle body 131 are engaged with the driving unit 140 (see FIG. 13) when the rotary cleaning unit 130 is installed inside the housing. Accordingly, the nozzle body 131 can receive rotational driving force from the driving unit.

The nozzle body 131 may be formed of a metal (extruded material) or a plastic (injection molded) material, but the material of the nozzle body 131 is not particularly limited in the present invention. The metal may have the shape of the nozzle body by extrusion. Extrusion refers to a molding method in which a raw material is put into a mold and a pressure is applied in one direction to produce a product having a constant sectional area. On the other hand, the plastic can have the shape of the nozzle body 131 by injection. Injection refers to a molding method in which a raw material is put into one of an upper mold and a lower mold, and pressed with the other one to make a product according to the shape of the mold.

Since the nozzle body 131 rotates at high speed, minimum durability must be ensured. 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 means the difference between the outer radius and the inner radius of the nozzle body.

The strength of the plastic is less than the strength of the metal. Therefore, the minimum thickness of the plastic for minimum durability should be greater than the minimum thickness of the metal. If the minimum thickness of the nozzle body 131 is large, the weight of the nozzle body 131 becomes relatively heavy, so that the load applied to the motor 143 (see FIG. 12) for rotating the nozzle body 131 also increases. Also, the increase in the thickness of the nozzle body 131 causes an increase in the material cost.

In this respect, the nozzle body 131 is preferably made of a metal material rather than a plastic material. Particularly, since the aluminum extruded material is light and strong enough in the metal, it is suitable as the material of the nozzle body 131.

The fibrous layer 134 is formed to surround the outer circumferential surface of the nozzle body 131. According to the design, the spin cleaning unit 130 may not include the fiber layer 134. In this case, the fiber wool 132 and the metal wool 133 may be directly coupled to the outer circumferential surface of the nozzle body 131 .

The fiber wool 132 and the metal wool 133 are disposed on the outer peripheral surface of the nozzle body 131. The metal foil 133 is an organic conductive fiber. The fiber wool 132 and the metal wool 133 may be coupled to the nozzle body 131 or to the fiber layer 134. 15 shows a configuration in which the fiber wool 132 and the metal wool 133 are planted in the fiber layer 134. In Fig.

The fiber wool 132 and the metal wool 133 fabricated in the fiber layer 134 may be randomly arranged. The fibrous hairs 132 may be buried without any distinction or unity, and the fibrous hairs 133 may be sparsely popped between the fibrous hairs 132. The number ratio or area ratio of the fiber wool 132 and the metal wool 133 will be described later.

The fiber wool 132 and the metal wool 133 extend in the 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 wool 132 and the metal wool 133 rotate together with the nozzle body 131. The fiber wool (132) and the metal wool (133) collide with the floor surface or the carpet and shake out debris, dust, etc. existing in the bottom surface or the carpet.

When the rotary cleaning unit 130 is rotated, the fiber curls 132 and the floor (or carpet) to be cleaned collide with each other, and static electricity due to friction is generated in the process. 1) and the wire or the like inside the vacuum cleaner body 10 (see Fig. 1) if the outer peripheral surface of the rotary cleaning part 130 is made of only the fiber wool 132 without the metal wool 133, And the user.

However, when the metal wool 133 is provided in the rotary cleaning unit 130 as in the present invention, the metal wool 133 has conductivity, so that the static electricity generated by the wool wool 132 is discharged through the metal wool 133 Can be de-electrified. Since the metallic wool 133 serves as a charging passage connected to the floor or carpet or acts as a static eliminator, static electricity can be prevented from being transmitted to the user. If the electrostatic capacity is about 8 kV when the rotary cleaning part is composed of only the fiber wool 132 without the metal wool 133 but the rotary cleaning part 130 includes both the fiber wool 132 and the metal wool 133, kV, respectively.

The fiber wool 132 may be formed of nylon. The metal mesh 133 may include a fiber mesh 133a (see FIG. 16) such as nylon and the conductive coating layer 133b (see FIG. 16). The fiber wool 133a included in the metal wool 133 may be the same as or different from the material of the fiber wool 132 formed in the nozzle body 131 or the fiber layer 134. [ The metal stud 133 will be described in more detail with reference to Fig.

16 is a conceptual view showing a manufacturing process of the rotary cleaning unit 130. FIG.

In order to manufacture the rotary cleaning unit 130, the metal wool 133 must first be manufactured and the metal wool 133 must be worn together with the fiber wool 132 in the nozzle body 131 or the fiber layer 134. [

Referring to FIG. 16, in order to fabricate the metal wool 133, a very long fiber wool 133a is first prepared. The fiber wool 133a may be formed of nylon.

Next, a conductive material is coated on the outer peripheral surface of the fiber cores 133a to form a conductive coating layer 133b. The conductive coating layer 133b may be formed of brass or digenite (Cu ₉ S ₅ ).

The average thickness of the conductive coating layer 133b is preferably 0.3 to 1.0 mu m. The average thickness A of the conductive coating layer 133b refers to the remainder excluding the radius of the fiber mesh 133a in the radius of the metal mesh 133. [ If the average thickness of the conductive coating layer 133b is thinner than 0.3 占 퐉, it is difficult to sufficiently prevent static electricity. This is because sufficient conductivity is not provided to the metal oxide 133. On the other hand, if the average thickness of the conductive coating layer 133b exceeds 1.0 占 퐉, the friction with the bottom surface or the carpet to be cleaned becomes excessively large, making it difficult to smoothly clean.

Next, the fiber tufts 133a having the conductive coating layer 133b are cut to a length suitable for forming. A single metal hair 133 is completed when twisted or twisted threads are gathered.

Finally, the metal foil 133 is buried in the fiber layer 134 together with the fiber wool 132. The fiber wool 132 to be worn together with the metal wool 133 is also formed by twisting a fiber bundle. The fiber layer 134 is formed with a plurality of flocked portions 135a and 135b capable of forming the fiber wool 132 and the metal wool 133. Each of the flocked parts 135a and 135b are disposed apart from each other. Each of the forming parts 135a and 135b is composed of a hole 135a and a bridge 135b across the hole 135a.

The holes 135a of the forming portions 135a and 135b are divided into two by the bridge 135b. When the fiber wool 132 and the metal wool 133 to be worn on one of the hairs 135a and 135b are inserted into one hole and passed through the other hole, the center of the fiber wool 132 and the center of the metal wool 133 Lt; RTI ID = 0.0 > 135b. ≪ / RTI > Both ends of the fiber wool 132 and the metal wool 133 extend in the direction away from the center of the nozzle body 131. [

The fiber wool (132) and the metal wool (133) are supported by the support part (136). The support portion 136 is formed between the nozzle body 131 and the fibrous layer 134. The fibrous layer 134 is formed so as to surround the nozzle body 131 and the support part 136 is formed by curing the adhesive between the nozzle body 131 and the fibrous layer 134. The center of the fiber wool 132 and the center of the metal wool 133 can be fixed to the bridge 135b by the support portion 136. [

The support 136 can determine the placement of the fiber wool 132 and the metal wool 133. For example, the support portion 136 may extend along the longitudinal direction of the nozzle body 131, extend along the circumferential direction of the nozzle body 131, or extend along the helical direction of the nozzle body 131 . Accordingly, the fiber wool 132 and the metal wool 133 can be disposed to extend along the longitudinal direction, the circumferential direction, or the spiral direction of the nozzle body 131.

When an object charged with a positive or negative polarity is approached, the metal oxide 133 is formed so as to generate an opposite charge of negative or positive polarity and neutralize the static electricity instantaneously by corona discharge. The metal wool 133 has the effect of eliminating the static electricity by the corona discharge.

Furthermore, since the metal wool 133 includes the conductive coating layer 133b formed of dicenite, it has the antibacterial and deodorizing performance provided by the dying knight. For example, the metallic hair 133 has antimicrobial activity against yellow staphylococcus, pneumococcus, E. coli, and P. aeruginosa.

In addition, the metal wool 133 has the heat storage performance and the electromagnetic wave absorption performance provided by the dike knight. The heat storage performance means the absorption of sunlight or near infrared rays and conversion into heat energy. The electromagnetic wave absorption performance refers to the absorption of electromagnetic waves emitted from a mobile terminal or the like and conversion into heat energy.

The average thickness of the metal wool 133 is preferably 220 to 260 dTex (deci-Tex or dexi-Tex). If the average thickness of the metal wool 133 is thinner than 220 dTex, the metal wool 133 is sparsely arranged on the outer peripheral surface of the fiber layer 134, thereby lowering the cleaning performance. Further, the sealing may not be sufficiently performed, and dust may be generated between the metal fins 133. On the contrary, when the average thickness of the metal wool 133 exceeds 260 dTex, the suction force of the suction motor is excessively increased due to close contact with the main body 111 (see Fig. 2) of the suction nozzle. Also, friction with the floor or the carpet to be cleaned becomes excessively large, making it difficult to clean the floor smoothly.

It is preferable that the number ratio (number ratio) of the metal wool 133 to the sum of the fiber wool 132 and the metal wool 133 is 2.5% or more. For example, if the sum of the number of the fiber wool 132 and the number of the metal wool 133 is 200, the number of the metal wool 133 is preferably 5 or more. If the number of metal fins 133 is less than 2.5%, the prevention of static electricity transmission or the function of static electricity elimination is not sufficiently achieved. On the other hand, if the number ratio of the metal fins 133 increases, the effect of preventing the transmission of static electricity or the effect of static electricity increases, but the increase is not large. Also, when the number ratio of the metal fins 133 reaches 25%, the effect of preventing static electricity transmission or the effect of static elimination is saturated.

Both the fiber wool 132 and the metal wool 133 have a certain thickness. The fiber wool 132 and the metal wool 133 formed on the flocking parts 135a and 135b cover the outer circumferential surface of the nozzle body 131 even though the flocking parts 135a and 135b are spaced apart from each other. Since the fiber wool 132 and the metal wool 133 cover the outer peripheral surface of the nozzle body 131, the number ratio of the metal wool 133 substantially coincides with the area ratio. Accordingly, the area ratio occupied by the metal wool 133 on the outer peripheral surface of the nozzle body 131 is preferably 2.5% or more. The technical significance of the lower limit, the prevention of static electricity transmission, or the saturation of the static electricity elimination effect is replaced by the one described in the previous section.

The electrical resistance of one strand of the metal wool 133 is preferably 100 k? Or less. The fact that the metal oxide 133 is not infinite in electrical resistance means that the metal oxide 133 has conductivity. However, if the electric resistance of one strand 133 of the metal wool 133 exceeds 100 k ?, the effect of preventing static electricity from being transmitted or the effect of static electricity erosion will be deteriorated.

It is preferable that the surface cleaning value of the rotary cleaning part 130 including the metal pattern 133 is 1 x 10 ² to 1 x 10 ³ ? / 10 cm. It is also preferable that the resistivity of the metal wool 133 is 1 × 10 ^-1 to 1 × 10 ^-2 Ω / 10 cm. The significance of the surface resistance value and the meaning of the resistivity value are replaced with the description of the meaning of the electrical resistance of one strand 133.

The tensile strength of one strand of the metal wool 133 is preferably 3.5 cN / dTex (centi Newton / deci-Tex) or more. The tensile strength is a numerical value indicating the mechanical durability and reliability of the metal wool 133.

The tensile elongation of one strand of the metal wool 133 is preferably 33 to 45%. When the rotary cleaning unit 130 is rotated, the metal wool 133 is tangled with the carpet to be cleaned. Therefore, the metal wool 133 must have a tensile elongation value of 33% or more so that the cleaning can be performed while tangling with the carpet to be cleaned. However, when the metal wool 133 is more than 45%, only some metal wool 133 may be excessively extended in the rotary cleaning part 130 to form a non-uniform outer circumferential surface, which may cause deterioration of cleaning performance .

The specific gravity of the metal wool 133 may be 1.05 to 1.20 g / cm < ³ >, and the process water content may be 4.5% or less. These conditions are to ensure optimum electrostatic discharge prevention or electrostatic discharge effect and optimal cleaning performance.

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

17 is a conceptual view showing another example of the rotation cleaning unit 230. FIG.

The rotary cleaning part 230 includes a strap part 237 and an anti-static part 238. The strap portion 237 and the static electricity prevention portion 238 are distinguished according to whether the fiber wool 132 (see FIG. 16) and the metal wool 133 (see FIG. 16) are formed.

The strap portion 237 is composed of a fiber wool 132. The metal wool 133 is not buried in the strap portion 237.

The anti-static portion 238 is composed of a fiber wick 132 and a metal worm 133. The respective denominators in the number ratio and the area ratio of the metal wool 133 described above are values obtained by adding the strap portion 237 and the anti-static portion 238 together.

Referring to FIG. 17, the strap portion 237 extends along the longitudinal direction of the nozzle body 231. The plurality of strap portions 237 are spaced apart from each other. An anti-static portion 238 is disposed between each strap portion 237. Each of the antistatic parts 238 also extends along the longitudinal direction of the nozzle body 231 like the strap part 237. Each of the anti-static portions 238 is disposed apart from each other.

The intervals between the strap portions 237 are equal to each other. Also, the intervals between the respective anti-static portions 238 are equal to each other. The spacing between the strap portion 237 and the anti-static portion 238 may be the same or different. The strap portion 237 and the anti-static portion 238 may further include a dye coating layer.

Reference numerals 231a and 231b, which are not shown in FIG. 17, denote protrusions, and 234 denotes a fiber layer.

FIG. 18 is a conceptual view showing another example of the rotation cleaning unit 330. FIG.

The strap portion 337 extends along the circumferential direction of the nozzle body 331. The plurality of strap portions 337 are spaced apart from each other. An anti-static portion 338 is disposed between each strap portion 337. Each antistatic portion 338 also extends along the circumferential direction of the nozzle body 331 like the strap portion 337. Each of the anti-static portions 338 is disposed apart from each other.

The widths and intervals of the strap portions 337 are equal to each other. Also, the width and the interval of the respective anti-static portions 338 are equal to each other. The strap portion 337 and the static electricity prevention portion 338 may have the same width or different intervals. The strap portion 337 and the anti-static portion 338 may further include a dye coating layer.

Reference numerals 331a and 331b, which are not shown in FIG. 18, denote protrusions, and 334 denotes a fiber layer.

FIG. 19 is a conceptual view showing another example of the rotation cleaning unit 430. FIG.

The strap portion 437 extends along the spiral direction of the nozzle body 431. The plurality of strap portions 437 are spaced apart from each other. An anti-static portion 438 is disposed between each strap portion 437. Each of the antistatic parts 438 also extends along the spiral direction of the nozzle body 431 like the strap part 437. Each of the anti-static portions 438 is disposed apart from each other.

The strap portion 437 and the static electricity prevention portion 438 extend along the spiral direction so that the strap portion 437 is inclined when the rotary cleaning portion 430 is viewed from the front, As shown in Fig.

The widths and intervals of the strap portions 437 are equal to each other. Also, the widths and the intervals of the respective anti-static portions 438 are equal to each other. The width and spacing of the strap portion 437 and the static electricity prevention portion 438 may be the same or different. The strap portion 437 and the antistatic portion 438 may further include a dye coating layer.

Reference numerals 431a and 431b, not shown in FIG. 19, denote protrusions, and 434, a fiber layer.

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

20 is a sectional view showing another example of the suction nozzle 510. Fig. 21 is an enlarged cross-sectional view of portion A of Fig.

It has been described that the driving unit 540 is provided with a brushless DC (BLDC) motor and the driving unit 540 is disposed at one side of the rotary cleaning unit 530. However, the driving unit 540 may include a DC motor 543 instead of the BLDC motor. In particular, DC motor 543 has the advantage of being less expensive than BLDC motor.

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

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

The motor housing 542 is formed to enclose the DC motor 543, the gear 545, the cover portion 547, the shaft 548, and the like. The DC motor 543, the gear 545, the cover portion 547, the shaft 548, and the like are 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 that include both the structure in which the nozzle body 531 is rotatably supported regardless of its shape and arrangement.

If the support members 549a, 544, and 550 and the nozzle body 531 are formed of different materials, noise and scratches may occur due to friction between different materials. In order to suppress the generation of noise and scratches, the suction nozzle 510 includes brackets 546a and 546b. Since the brackets 546a and 546b are rotated together with the nozzle body 531, it can also be understood that the rotary cleaning unit 530 includes the brackets 546a and 546b.

The bearing portions 549a and 544 and the rotation support portion 550 shown in Fig. 20 rotatably support the nozzle body 531 and are included in the concept of the support members 549a, 544 and 550, respectively. A bracket 546a disposed between the bearing portions 549a and 544 and the nozzle body 531 and a bracket 546b disposed between the rotation support portion 550 and the nozzle body 531 are sequentially Explain. The two brackets 546a and 546b may be referred to as a first bracket 546a and a second bracket 546b for mutual distinction.

The bearing portions 549a and 544 are installed around the shaft 548 to rotate with the shaft 548. The bearing portions 549a and 544 include a bearing 549a and a bearing cover 544.

The bearing 549a is mounted around the shaft 548 to support the rotating shaft 548. The bearing 549a serves to fix the shaft 548 in a fixed position and to rotate the shaft 548 while supporting the weight of the shaft 548 and the load of the shaft 548. [

The bearing 549a can be installed at each position where the support of the shaft 548 is required. In FIG. 20, three bearings 549a, 549b, and 549c are shown mounted around the shaft 548. As shown in FIG.

The bearing cover 544 is formed to protect the bearing 549a. The bearing cover 544 is installed around the bearing 549a. However, the bearing cover 544 is not provided for each bearing 549a. For example, a bearing cover 544 may be provided for only a portion of the plurality of bearings 549a, 549b, and 549c.

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

The first bracket 546a is coupled to the end of the nozzle body 531 to suppress the generation of noise and scratches due to the friction between the end of the nozzle body 531 and the bearing 549a. The first bracket 546a is pressed against the end of the nozzle body 531 along the longitudinal direction of the nozzle body 531 in the horizontal direction or the extending direction of the shaft 548, (Not shown).

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 mutual friction between the nozzle body 531 and the bearing cover 544.

The first bracket 546a is formed of a plastic injection molding. This is because if the first bracket 546a is made of the same material as the bearing cover 544, noise and scratches due to friction between different materials can be suppressed. However, the term "homogeneous material" does not mean completely the same material.

As the first bracket 546a is coupled to the nozzle body 531, the first bracket 546a contacts the bearing portions 549a and 544. More specifically, the first bracket 546a comes into surface contact with the outer peripheral surface of the bearing cover 544. Therefore, the bearing cover 544 and the first bracket 546a have mutual contact surfaces S1 and S2. The mutual contact surfaces S1 and S2 are the surfaces of the bearing cover 544 in contact with the first bracket 546a and the surface of the first bracket 546a in contact with the bearing cover 544 21 of S2).

21, the mutual contact surfaces S1, S2 of the bearing cover 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 and S2 between the bearing cover 544 and the first bracket 546a are parallel to the longitudinal direction of the nozzle body 531, the bearing 549a and the bearing The position of the cover 544 is not fixed. Thereby, the shaft 548 may move along the longitudinal direction of the nozzle body 531.

Therefore, in order to fix the positions of the bearings 549a and 544 during the rotation of the shaft 548, the mutual contact surfaces S1 and S2 of the first bracket 546a and the bearing cover 544 contact the nozzle body 531 ) In the longitudinal direction.

From the three dimensional viewpoint, the mutual contact surfaces S1 and S2 may have a shape corresponding to a side surface of a circular truncated cone. In this case, the radiuses of the mutual contact surfaces S1 and S2 may gradually increase from the center of the nozzle body 531 toward the outer side along the longitudinal direction. The mutual contact surfaces S1 and S2 are inclined with respect to the longitudinal direction of the nozzle body 531 as the radii of the mutual contact surfaces S1 and S2 gradually expand.

The brackets 546a and 546b may be coupled to both sides of the nozzle body 531, respectively. Referring to FIG. 20, the second bracket 546b coupled to the left side of the nozzle body 531 is formed so as to surround the rotation support unit 550.

The rotation support portion 550 is engaged with the side cover 516 of the suction nozzle 510. The rotation support part 550 is inserted into one end of the nozzle body 531 so as to rotatably support the nozzle body 531.

The second bracket 546b is physically connected to a shaft 548 that transmits the driving force of the DC motor 543. [ For example, a polygonal groove (not shown) or a hole (not shown) corresponding to the shaft 548 may be formed in the second bracket 546b, and a shaft 548 may be inserted into the groove or hole .

The driving force of the DC motor 543 can be transmitted to the nozzle body 531 through the shaft 548, the gear 545, and the second bracket 546b. The rotation support part 550 may be fixed to rotate relative to the nozzle body 531 or rotate together with the nozzle body 531. The driving force of the DC motor 543 is transmitted to the nozzle body 531 through the shaft 548, the gear 545, the second bracket 546b, and the rotation support portion 550, (Not shown).

The rotation support part 550 may be formed of a plastic injection molding. Accordingly, when the rotary support 550 and the nozzle body 531 are in direct contact with each other, noise and scratches due to friction between different materials occur. Since the second bracket 546b is disposed between the rotary support 550 and the nozzle body 531, it is possible to suppress the generation of noise and scratches. This is because the second bracket 546b is formed of the same material as the rotation support portion 550. However, the term "homogeneous material" does not mean completely the same material.

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

The nozzle body coupling portion 546b1 is formed in a circular shape so as to be engageable with the end portion of the nozzle body 531. [ The nozzle body coupling portion 546b1 is formed so as to surround the inner peripheral surface and the outer peripheral surface of the nozzle body 531. [ The nozzle body 531 is sandwiched between a portion enclosed by the nozzle body 531 and a portion enclosing the nozzle body 531.

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

The extension portion 546b2 can press the inner peripheral surface of the nozzle body 531 in the radial direction (the thickness direction from the inner peripheral surface to the outer peripheral surface). For example, if the distance between two opposing portions of the extension portion 546b2 (the distance including the thickness of the extension portion 546b2) is larger than the inner diameter of the nozzle body 531, the two portions of the extension portion 546b2 The inner peripheral surface of the nozzle body 531 can be pressed in the radial direction. The extension portion 546b2 presses the inner circumferential surface of the nozzle body 531 so that the second bracket 546b can be prevented from being arbitrarily disengaged from the nozzle body 531. [

The shaft engaging portion 546b3 extends from the extension portion 546b2 toward the shaft 548 to be engaged with the shaft 548. [ The shaft engaging portion 546b3 may be disposed between the rotation supporting portion 550 and the driving portion 540. [ A polygonal groove or hole corresponding to the shaft 548 may be formed in the shaft engaging portion 546b3. The shaft 548 can be inserted with the groove or hole, and the driving force can be transmitted through the polygonal structure.

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

The driving force may not be sufficiently transmitted to the nozzle body 531 if the second bracket 546b relatively rotates 360 degrees relative to the nozzle body 531. [ For example, the nozzle body 531 may be idle. And the driving force is transmitted to the nozzle body 531 through the second bracket 546b.

In order to prevent such a phenomenon, the extended portion 546b2 of the second bracket 546b and the protrusions 531a and 531b should be in contact with each other. Even if the second bracket 546b and the nozzle body 531 relatively rotate relative to each other by a predetermined angle, the extension portion 546b2 can transmit the driving force by pressing the protrusions 531a and 531b in the rotating direction of the nozzle body 531 Because. For this purpose, the protruding portions 531a and 531b and the extending portion 546b2 should be located on the same plane. Here, the same plane indicates the inner circumferential surface of the nozzle body 531.

Reference numeral 515, which is not shown in Figs. 20 and 21, indicates a side cover.

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

The nozzle body 531 of the rotating cleaning unit 530 is coupled to the first bracket 546a. As the first bracket 546a comes into 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 engagement portion 546a1, an extension portion 546a2, and a surface contact portion 546a3.

The nozzle body engaging portion 546a1 is formed in a circular shape so as to be engageable with the end portion of the nozzle body 531. [ The nozzle body coupling portion 546a1 is formed so as to surround the inner peripheral surface and the outer peripheral surface of the nozzle body 531. [ The nozzle body 531 is sandwiched between a portion enclosed by the nozzle body 531 and a portion enclosing the nozzle body 531.

The extension portion 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 portion 546a2 may be in contact with the inner peripheral surface of the nozzle body 531. [

A plurality of extension portions 546a2 may be provided. For example, in FIG. 22, the first bracket 546a is shown having four extensions 546a2. Each of the extending portions 546a2 can press the inner peripheral surface of the nozzle body 531 in the radial direction (the thickness direction from the inner peripheral surface to the outer peripheral surface).

The two extended portions 546a2 are formed on the inner peripheral surface of the nozzle body 531 so that the distance between the two extended portions 546a2 facing each other (the distance including the thickness of the extended portion 546a2) is larger than the inner diameter of the nozzle body 531. [ In the radial direction. It is possible to prevent the first bracket 546a from being arbitrarily disengaged from the nozzle body 531 because the two extended portions 546a2 press the inner peripheral surface of the nozzle body 531. [

The structure in which the extension portion 546a2 is in contact with the projection portions 531a and 531b of the nozzle body 531 and the extension portion 546a2 presses the projection portions 531a and 531b in the rotating direction is also applied to the first bracket 546a .

The surface contact portion 546a3 protrudes from the inner peripheral surface of the nozzle body engaging portion 546a1. The surface contact portion 546a3 is in surface contact with the bearing portions 549a and 544 to support the rotation of the shaft 548 and the bearing portions 549a and 544. [ The mutual contact surfaces (S1, S2, refer to FIG. 21) between the first bracket 546a and the bearing cover 544 have been described above. 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, which is inclined or extends toward the outer side, is replaced with the above description.

A plurality of the surface contact portions 546a3 may be provided. For example, in FIG. 22, the first bracket 546a is shown as having four surface-contacting portions 546a3. In this case, the surface contact portions 546a3 may be disposed apart from each other. The contact surface S1 of the bearing cover 544 is a closed curve whereas the surface contact portion 546a3 is not a closed curve.

The force applied to the surface contact portion 546a3 by the nozzle body 531 of the surface contact portion 546a3 and the force required to prevent the first bracket 546a from being separated from the nozzle body 531 at random The extension portions 546a2 and the surface contact portions 546a3 may be alternately arranged so as to be evenly distributed to the bracket 546a.

22, reference numeral 534 denotes a fiber layer, 537 denotes a strap portion, and 538 denotes an antistatic portion.

The vacuum cleaner described above is not limited to the configuration and the method of the embodiments described above, but all or a part of the embodiments may be selectively combined so that various modifications may be made to the embodiments.

Claims (30)

A vacuum cleaner main body having a suction motor inside and a handle on the outside; And
And a suction nozzle connected to the cleaner main body,
The suction nozzle
A housing having at least a portion of a front side thereof opened; And
And a rotation cleaning unit installed inside the housing, at least a part of which is exposed through an opened portion of the housing, and configured to clean the floor surface by a rotation operation,
The rotation-
A cylindrical nozzle body rotatably installed inside the housing; And
And a fibrous hair and a metal hair arranged on an outer circumferential surface of the nozzle body. The method according to claim 1,
The metal moiety,
Fiber Mo; And
And a conductive coating layer coated on an outer circumferential surface of the fiber simulator. 3. The method of claim 2,
Wherein the conductive coating layer is formed of brass or digenite (Cu ₉ S ₅ ). 3. The method of claim 2,
Wherein the conductive coating layer has an average thickness of 0.3 to 1.0 mu m. The method according to claim 1,
Wherein the average thickness of the metal foil is 220 to 260 dTex (deci-Tex). The method according to claim 1,
Wherein the ratio of the number of the metal foams to the sum of the metal foams and the metal foams is 2.5% or more. The method according to claim 1,
Wherein an area ratio of the metal mold on the outer peripheral surface of the nozzle body is 2.5% or more. The method according to claim 1,
Wherein the electrical resistance of the metal wool strand is 100 k? Or less. The method according to claim 1,
Wherein the tensile strength of the metal wool strand is not less than 3.5 cN / dTex (centi Newton / deci-Tex). The method according to claim 1,
And the tensile elongation of the metal aggregate is 33 to 45%. The method according to claim 1,
Wherein a surface resistance value of the rotary cleaning unit is 1 x 10 2 to 1 x 10 3 Ω / 10 cm. The method according to claim 1,
Wherein the resistivity value of the metal foil is 1 x 10 < -1 > to 1 x 10 < -2 > [Omega] / 10 cm. The method according to claim 1,
Wherein the fiber wool and the metal wool are each formed by twisting a bundle. The method according to claim 1,
The rotary cleaning unit may further include a fiber layer formed to surround an outer peripheral surface of the nozzle body,
Wherein the fibrous layer is formed with a plurality of fibrous hairs and a plurality of hairs capable of forming the metal hairs apart from each other,
Wherein each of the bristles comprises a hole and a bridge across the hole. 15. The method of claim 14,
The center of the fiber simulation and the center of the metal simulation are fixed to the bridge,
And both ends of the fiber wool and the metal wool extend in a direction away from the center of the nozzle body. 15. The method of claim 14,
Wherein the rotary cleaning unit further includes a support portion formed to support the fiber wool and the metal wool,
Wherein the support portion is disposed between the nozzle body and the fibrous layer, and is formed by curing the adhesive. 17. The method of claim 16,
Wherein the support portion extends along a longitudinal direction, a circumferential direction, or a spiral direction of the nozzle body. The method according to claim 1,
The rotation-
A strap portion composed of the fiber strands; And
And an antistatic portion formed of the fiber wool and the metal wool. 19. The method of claim 18,
Wherein the strap portion and the anti-static portion extend along a longitudinal direction, a circumferential direction, or a spiral direction of the nozzle body. 20. The method of claim 19,
Wherein the strap portion and the anti-static portion have the same width. The method according to claim 1,
Wherein the nozzle body is formed of an extruded metal material. 22. The method of claim 21,
Wherein the metal material comprises aluminum. The method according to claim 1,
The suction nozzle
A support member inserted into at least one end of the nozzle body to rotatably support the nozzle body, the support member being formed of a material different from that of the nozzle body; And
And a bracket coupled to an end of the nozzle body and in surface contact with the support member. 24. The method of claim 23,
Wherein a contact surface between the support member and the bracket is inclined with respect to a longitudinal direction of the nozzle body. 24. The method of claim 23,
Wherein the support member comprises:
A bearing installed around a shaft extending along a longitudinal direction of the nozzle body; And
And a bearing cover formed to surround the bearing and formed of a material different from that of the nozzle body,
Wherein the bracket is disposed between the nozzle body and the bearing cover. 26. The method of claim 25,
The bracket
A nozzle body coupling part having a circular shape to be engageable with an end of the nozzle body;
An extension extending from the nozzle body coupling part to the inside of the nozzle body along the inner circumferential surface of the nozzle body; And
And a surface contact portion protruding from an inner circumferential surface of the nozzle body coupling portion and in surface contact with the bearing cover. 27. The method of claim 26,
Wherein the extending portion and the surface contacting portion are alternately arranged. 24. The method of claim 23,
Wherein the support member comprises:
And a rotation support portion coupled to a side cover of the suction nozzle and inserted into one end of the nozzle body to rotatably support the nozzle body,
Wherein the bracket is disposed between the nozzle body and the rotation support portion. 29. The method of claim 28,
The bracket
A nozzle body coupling portion formed in a circular shape so as to be engageable with an end portion of the nozzle body;
An extension extending from the nozzle body coupling part to the inside of the nozzle body along the inner circumferential surface of the nozzle body; And
And a shaft coupling portion extending from the extension portion toward the shaft so as to be coupled to a shaft that transmits the driving force generated from the driving portion to the nozzle body. 24. The method of claim 23,
Wherein the nozzle body has a protrusion protruding from an inner circumferential surface of the nozzle body,
The protrusion extends along the longitudinal direction of the nozzle body,
Wherein the bracket is in contact with the protrusion so as to press the protrusion in the rotational direction of the nozzle body.

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