KR20200058364A - Vacuum cleaner - Google Patents

Abstract

According to the present invention, a vacuum cleaner includes: a cleaner main body having a suctioning motor on the inside and a handle on the outside; and a suctioning nozzle connected to the cleaner main body. The suctioning nozzle includes: a housing having a front side which is at least partially open; a rotary cleaning part installed inside the housing, having at least one part exposed through the open part of the housing, and formed to clean a floor surface through a rotation operation; a driving part inserted into one side of the rotary cleaning part to provide power for rotating the rotary cleaning part; and a rotary support part inserted into the other side of the rotary cleaning part to support the rotary cleaning part to be rotatable. The rotary cleaning part includes: a cylindrical nozzle body installed inside the housing to be rotatable; and a protrusion part protruding from the inner circumference surface of the nozzle body, and receiving power from the driving part. Therefore, the vacuum cleaner is capable of improving reliability of an antistatic structure by providing optimal material properties.

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.

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

These vacuum cleaners are classified into canister cleaners, upright cleaners, stick cleaners, handy cleaners, and robot cleaners. In the case of a canister cleaner, a suction nozzle for sucking dust is provided separately from the cleaner body, and the cleaner body and the suction nozzle are connected to each other by a connecting device. In the case of an upright cleaner, the suction nozzle is rotatably connected to the cleaner body. In the case of a stick cleaner and a handy cleaner, it is used in a state where the user holds the cleaner body by hand. However, in the case of a stick cleaner, the suction motor is disposed close to the suction nozzle (lower center), and in the case of a handy cleaner, the suction motor is disposed close to the grip (upper center). The robot cleaner cleans itself while driving itself through the autonomous driving system.

The suction nozzle refers to the part that directly touches the floor and inhales dust and air. The suction force generated by the suction motor mounted inside the cleaner body is transmitted to the suction motor, and dust and air are sucked into the suction nozzle by the suction force.

A rotary cleaning unit (or agitator) is installed on the suction nozzle. The rotating cleaning unit serves to improve the cleaning performance by scraping off the dust in the floor or carpet while rotating. A brush is attached to the rotary cleaning part, and this brush causes friction with the floor or carpet.

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

The problem is that the static electricity generated in this way is transmitted to the user through the cleaner body or the electric wire. In particular, in the case of a stick vacuum cleaner or a handy vacuum cleaner, since the user grasps the cleaner body, static electricity may be transmitted directly to the user.

Among the prior art documents, Korean Patent Publication No. 10-2012-0027357 (2012.03.21.), Etc., discloses structures that prevent the generation or transmission of static electricity. However, since the above patent simply defines the physical properties of the filament as sheet resistance, there is a limit to be practically applied to a vacuum cleaner.

Republic of Korea Patent Publication No. 10-2012-0027357 (2012.03.21.)

One object of the present invention is to propose a vacuum cleaner having a structure that can prevent the static electricity generated by the rotation of the rotary cleaning unit is transmitted to the user.

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

Another object of the present invention is to provide a vacuum cleaner having a configuration that can improve the reliability of the antistatic structure.

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

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

The suction nozzle includes a housing in which at least a portion of the front is opened, the rotary cleaning unit is installed inside the housing, and at least a portion is exposed through the opened portion of the housing.

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

The metal wool, fiber wool; And a conductive coating layer coated on the outer peripheral surface of the fiber wool.

The conductive coating layer is formed of brass or digenite (Cu9S5).

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

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

The ratio of the number of the metal wool to the sum of the fiber wool and the metal wool is 2.5% or more.

The area ratio of the metal cap on the outer circumferential surface of the nozzle body is 2.5% or more.

The electrical resistance of one strand of the metal wool is 100 kΩ or less.

The tensile strength of one strand of the metal wool is greater than or equal to 3.5 cN / dTex (centi Newton / deci-Tex).

The tensile elongation of one strand of the metal wool is 33 to 45%.

The surface resistance value of the rotary cleaning unit is 1 × 102 to 1 × 103 Ω / 10cm.

The specific resistance value of the metal wool is 1 × 10-1 to 1 × 10-2 Ω / 10cm.

The fiber hair and the metal hair are formed by twisting the bundles, respectively.

The rotary cleaning part further includes a fiber layer formed to surround the outer circumferential surface of the nozzle body, and the fiber layer is formed with a plurality of hair parts capable of wearing the fiber hair and the metal hair spaced apart from each other, and each of the hair parts has a hole and the hole. It consists of a bridge across.

The center of the fiber wool and the center of the metal wool are fixed to the bridge, and both ends of the fiber wool and the metal wool extend to face away from the center of the nozzle body.

The rotary cleaning part further includes a support part formed to support the fiber hair and the metal hair, and the support part is disposed between the nozzle body and the fiber layer, and is formed by curing of an adhesive.

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

The rotating cleaning unit, the strap portion made of the fiber wool; And an anti-static portion composed of the fiber wool and the metal wool.

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

The width of the strap portion and the antistatic portion are the same.

The nozzle body is formed of a metal extrudate.

The metal material includes aluminum.

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

The support member and the bracket are in contact with each other 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 the longitudinal direction of the nozzle body; And a bearing cover formed to surround the bearing and formed of a different material from the nozzle body, and the bracket is disposed between the nozzle body and the bearing cover.

The bracket, the nozzle body coupling portion having a circular shape to be coupled to the end of the nozzle body; An extension portion extending from the nozzle body coupling portion 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 coupling portion and making surface contact with the bearing cover.

The extension portion and the surface contact portion are alternately arranged.

The support member is coupled to a side cover of the suction nozzle, and includes a rotation support portion inserted into one end of the nozzle body to rotatably support the nozzle body, and the bracket includes the nozzle body and the rotation support portion. Is placed between.

The bracket includes a nozzle body coupling portion having a circular shape to be coupled to an end of the nozzle body; An extension portion extending from the nozzle body coupling portion 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 a driving force generated from the driving portion to the nozzle body.

The nozzle body has a protrusion protruding from the inner circumferential surface of the nozzle body, the protrusion extends along the longitudinal direction of the nozzle body, and the bracket contacts 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 configuration, the metal wool included in the rotating cleaning unit serves as a charging path for static electricity generated in the fiber wool or neutralizes it. Therefore, the static electricity generated in the metal wool may be discharged or destaticized through the metal wool before being delivered to the user.

In addition, the present invention can provide an optimum average thickness of the conductive coating layer or an optimum average thickness of the metal wool, thereby preventing deterioration of cleaning performance due to the antistatic structure or overload of the suction motor.

In addition, the present invention can improve the reliability of the antistatic structure by providing the optimum properties of the metal wool.

1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention.
FIG. 2 is a perspective view of the suction nozzle of FIG. 1.
FIG. 3 is a plan view of the suction nozzle of FIG. 2.
4 is a side view of the suction nozzle of FIG. 1.
5 is a front view of the suction nozzle of FIG. 1.
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. 1.
8 is an exploded perspective view of the suction nozzle of FIG. 1.
9 is an exploded perspective view of the housing.
10 is a cross-sectional view of the suction nozzle cut along line Ⅰ-Ⅰ` of FIG. 7.
11 is a cross-sectional view taken along line II-II of FIG. 7.
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.
14 is a cross-sectional view of the driving unit along the rotation axis of the rotary cleaning unit.
15 is a conceptual view showing an example of a rotary cleaning unit.
16 is a conceptual view showing a manufacturing process of the rotary cleaning unit.
17 is a conceptual view showing another example of the rotary cleaning unit.
18 is a conceptual view showing another example of the rotary cleaning unit.
19 is a conceptual view showing another example of the rotary cleaning unit.
20 is a cross-sectional view showing another example of the suction nozzle.
21 is an enlarged cross-sectional view of part A of FIG. 21.
22 is a conceptual diagram of a rotating cleaning unit and a first bracket coupled to the rotating cleaning unit.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing embodiments of the present invention, when it is determined that detailed descriptions of related well-known configurations or functions interfere with understanding the embodiments of the present invention, detailed descriptions thereof will be omitted.

In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to the other component, but another component between each component It should be understood that may be "connected", "coupled" or "connected".

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

Referring to FIG. 1, the vacuum cleaner 1 according to an embodiment of the present invention sucks air containing dust and a cleaner body 10 having a suction motor (not shown) for generating suction power therein. The suction nozzle 100 and the cleaner body 10 may include an extension pipe 17 connecting the suction nozzle 100.

Meanwhile, although not shown, the suction nozzle 100 may be directly connected to the cleaner body 10 without the extension tube 17.

The cleaner body 10 may include a dust container 12 in which dust separated from air is stored. Accordingly, dust introduced through the suction nozzle 100 may be stored in the dust container 12 through the extension tube 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 holding the handle 13.

A battery (not shown) may be provided in the cleaner body 10, and a battery accommodating portion 15 in which the battery (not shown) is accommodated may be provided in the cleaner body 10. The battery accommodating part 15 may be provided under 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.

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, Figure 6 Is a view showing a rotary cleaning unit removed 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, and FIG. 9 is an exploded perspective of the housing. Dogo, FIG. 10 is a cross-sectional view of the suction nozzle cut along I-I` in FIG. 7, and FIG. 11 is a cross-sectional view taken along II-II` in FIG. 7.

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. A front opening 111a for sucking air containing contaminants may be formed in the main body 111. The air introduced through the front opening 111a by the suction force generated by the cleaner body 10 may move through the chamber 112 to the connection pipe 120.

The front opening 111a may be formed to extend in the left-right direction of the housing 110, and may be formed to extend not only to the bottom portion of the housing 110 but also to the front portion of the housing 110. Accordingly, since the suction area can be sufficiently secured, it can be evenly cleaned from the bottom surface to the portion adjacent to the wall surface.

The housing 110 may further include an internal pipe 1112 communicating with the front opening 111a. Due to the suction force generated by the cleaner body 10, external air may move through the front opening 111a to the internal flow path 1112a of the internal pipe 1112.

The housing 110 may further include a driving unit 140 that provides power for rotating the rotary cleaning unit 130. The driving unit 140 may be inserted into one side of the rotating cleaning unit 130 to transmit power to the rotating cleaning unit 130. The driving unit 140 will be described in detail below 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 111a. The rotary cleaning unit 130 may rotate by the driving force transmitted through the driving unit 140 and rub with the bottom surface to shake off contaminants. In addition, the outer circumferential surface of the rotary cleaning unit 130 may be made of a fabric or felt material such as melt. Accordingly, foreign substances such as dust accumulated on the bottom surface of the rotary cleaning unit 130 may be effectively removed by being caught in the outer peripheral surface of the rotary cleaning unit 130.

The main body part 111 may cover at least a portion of the upper side of the rotary cleaning part 130. In addition, the inner circumferential surface of the body portion 111 may be formed in a curved shape to correspond to the outer circumferential surface shape of the rotary cleaning unit 130. Accordingly, the main body 111 may perform a function of preventing the foreign matter that is shaken off from the bottom surface by the rotation cleaning unit 130 rotating.

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 part 130.

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

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

The rotation cleaning unit 130 may rotate in a counterclockwise direction based on the cross-sectional view of FIG. 10. That is, the rotary cleaning unit 130 is rotated to push in the direction of the inner pipe 1112 at a point of contact with the bottom surface. Therefore, the foreign matter that the rotary cleaning unit 130 has brushed off from the bottom surface is moved to the inner pipe 1112, and is sucked into the inner pipe 1112 by suction force. The cleaning efficiency may be improved by rotating the rotating cleaning unit 130 backward based on a contact point with the bottom surface.

A partition member 160 may be provided in the chamber 112. The partition member 160 may be formed to extend from an upper side to a lower side of the chamber of the housing 110.

The partition member 160 may be provided between the rotary cleaning unit 130 and the internal pipe 1112. Accordingly, the partition member 160 moves the chamber of the housing 110 into a first area 112a in which the rotary cleaning unit 130 is provided and a second area 112b in which the internal piping 1112 is provided. Can be partitioned. As illustrated in FIG. 10, the first region 112a may be provided at the front portion of the chamber 112, and the second region 112b may be provided at the rear portion of the chamber 112.

The partition member 160 may include a first extension wall 161. The first extension wall 161 may be extended so that at least a portion of the rotary cleaning unit 130 contacts. Therefore, when the rotating cleaning unit 130 rotates, the first extension wall 161 may rub with the rotating cleaning unit 130 to shake off foreign substances attached to the rotating cleaning unit 130.

In addition, the first extension wall 161 may extend along the rotation axis of the rotation cleaning unit 130. That is, the contact point between the first extension wall 161 and the rotary cleaning unit 130 may be formed along the rotation axis direction of the rotary cleaning unit 130. Therefore, the first extension wall 161 can not only shake off foreign substances attached to the rotary cleaning unit 130, but also prevent foreign substances on the bottom surface from flowing into the first region 112a of the chamber 112. have. By blocking foreign matters from flowing into the first region 112a of the chamber 112, foreign matters are discharged to the front of the housing 110 through the front opening 111a by rotation of the rotary cleaning unit 130. Can be prevented.

In addition, the first extension wall 161 blocks the hair or thread attached to the rotary cleaning unit 130 from flowing into the first area 112a of the chamber 112, so that the rotary cleaning unit 130 To prevent the phenomenon of hair or thread winding. That is, the first extension wall 161 may perform an anti-tangle function.

The partition member 160 may further include a second extension wall 165. The second extension wall 165 may be extended so that at least a portion of the rotation cleaning unit 130 is in contact with the first extension wall 161. Therefore, when the rotating cleaning unit 130 rotates, the second extension wall 165 rubs with the rotating cleaning unit 130 like the first extension wall 161, and foreign matter attached to the rotating cleaning unit 130. Can shake off. Meanwhile, the second extension wall 165 is configured to have the same function as the first extension wall 161, and the rotation cleaning unit 130 can be used only with the first extension wall 161 without the second extension wall 165. Since it can perform the function of shaking off foreign substances attached to), the second extended barrier 165 may be included even if it is not included in the configuration of the housing 110.

The second extension wall 165 may be disposed above the first extension wall 161. Therefore, the second extension wall 165 has a function of secondarily separating foreign substances that are not separated by the first extension wall 161 in the rotary cleaning unit 130.

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

A plurality of suction flow paths F1, F2, and F3 in which external air is moved to the internal piping of the body portion 111 are formed in the body portion 111 of the suction nozzle 100.

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

The lower flow path F1 is formed under the rotary cleaning part 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 above the rotary cleaning unit 130. Specifically, the upper flow paths F2 and F3 may be connected to the inner flow path 1112a through 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 be joined to 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 on one side of the housing 110 and a second upper flow path F3 formed on the other side of the housing 110. Specifically, the first upper flow path F2 is disposed adjacent to the first side cover 115, and the second upper flow path F3 is disposed adjacent to the second side cover 116.

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

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

The first upper groove portion 165a is formed by recessing a portion of the inner circumferential surface of the second extension wall 165, that is, a portion that comes into contact with the rotary cleaning unit 130. In addition, the first upper groove portion 165a may be formed to 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 path F2 is formed along the first lower groove portion 161a and the first upper groove portion 165a. Is formed. Meanwhile, when the second extension 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 part 161a.

In addition, the first lower groove portion 161a and the first upper groove portion 165a may be formed to surround the driving unit 140. Accordingly, the first upper flow path F2 may be formed to surround at least a portion of the driving portion 140 along the circumference of the driving portion 140, and the driving portion 140 may include the first upper flow path ( It can be cooled by air flowing along F2).

The widths A in the left and right directions of the first lower groove portion 161a and the first upper groove portion 165a may be the same as illustrated, but are not limited to such features. The width A in the left-right direction of the first lower groove portion 161a and the first upper groove portion 165a may be formed in a predetermined size. When the width A of the left and right directions is small, since the width of the first upper flow path F2 is narrow, the flow amount of air may be small or the flow of air may be blocked, so the cooling performance of the driving unit 140 may be insignificant. have. Conversely, when the width A in the left-right direction is large, the flow rate of air may increase because the width of the first upper flow path F2 increases, but the first extension wall 161 and the second extension wall The anti-tangle function of hair or the like of the rotary cleaning unit 130 due to 165 may be deteriorated. Therefore, the width A in the left-right direction should be formed to an appropriate size, and may be formed to have a width smaller than the length of the driving unit. For example, the width A in the left and right directions of the first upper groove portion 165a may be formed in a range of 5 to 10 mm, but is not limited to such matters.

As illustrated in FIG. 11, the separation distance between the inner circumferential surface of the chamber 112 and the upper portion 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 separation distance between the inner circumferential surface of the chamber 112 and the upper portion of the rotary cleaning unit 130 is d1 at the front opening 111a side, d2 at the first upper groove portion 165a, and the first It may be formed of d3 in the lower groove portion (161a). It 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 this feature, the upper side of the rotary cleaning unit 130 may decrease the flow rate of air as it is closer to the front opening 111a, and accordingly, foreign matter is discharged forward by rotation of the rotary cleaning unit 130. The phenomenon can be suppressed.

Next, the second upper flow path F3 will be described. In order to form the second upper flow path F3, a second lower groove portion 161b is formed in the first extension wall 161, and a second upper groove portion 165b is formed in the second extension wall 165. Is formed.

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

The second upper groove portion 165b is formed at a position adjacent to the second side cover 116 at an inner circumferential surface of the second extension wall 165, that is, a surface in contact with the rotary cleaning unit 130. The second upper groove portion 165b is connected to the second lower groove portion 161b, and the second upper flow path F3 is formed along the second lower groove portion 161b and the second upper groove portion 165b. do. On the other hand, when the second extension wall 165 is not provided in the suction nozzle 100, the second upper flow path F3 may be formed only by the second lower groove portion 161b.

In addition, 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 circumference of the rotation support portion 150, and the rotation support portion 150 is cooled by air flowing along the second upper flow path F3. Can be.

The widths A in the left and right directions of the second lower groove portion 161b and the second upper groove portion 165b may be the same as illustrated, but are not limited to such characteristics. The width A in the left-right direction of the second lower groove portion 161b and the width A in the left-right direction of the second upper groove portion 165b are the first lower groove portion 161a and the first upper groove portion 165a. ) May be the same as the width A of the left and right directions.

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 is increased toward the inside of the chamber 112 as in the first upper flow path F2. It can be narrowed. A detailed description thereof will be omitted.

The partition member 160 may further include a third extension wall 163 coupled with the first extension wall 161. The third extension wall 163 may be coupled to the rear surface of the first extension wall 161 to support the first extension wall 161. The first lower wall portion 161a and the second lower groove portion 161b are formed in the first extended wall 161 to thereby form the third extended wall 163 in the first region 112a of the chamber 112. Some of the can be exposed.

As such, the housing 110 is provided with a lower flow path F1 provided on the lower side of the rotary cleaning unit 130, as well as a first upper flow path F2 provided on the upper side of the rotary cleaning unit 130, thereby driving the driving unit. Cooling of the 140 may be efficiently performed, and cooling of the rotation support 150 may be efficiently performed by providing the second upper flow path F3.

The connection pipe 120 may connect the housing 110 and the extension pipe 17 (see FIG. 1). That is, one side of the connection pipe 120 is connected to the housing 110, and 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 manipulating a mechanical coupling with the extension pipe 17. The user can combine or disconnect 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 hinged to the first connection member 113a to be rotatable in the vertical direction.

The housing 110 may be provided with connection members 113a and 113b for hinge connection with the connection pipe 120. The connecting 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 directly connected to the connection pipe 120. One side of the second connecting member 113b may be coupled to the first connecting member 113a and the other side of the second connecting member 113b may be coupled to the main body 111.

As shown in Figure 8, the first connection member 113a is provided with a hinge hole 114, and the connection pipe 120 can be provided with a hinge shaft 124 inserted into the hinge hole 114. have. However, unlike illustrated, a hinge hole may be formed in the connection pipe 120 and a hinge axis may be formed in the first connection member 113a. The hinge hole 114 and the hinge shaft 124 may be collectively called a “hinge part”.

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

The first connecting member 113a may be rotatably connected to the second connecting member 113b. Specifically, the first connecting member 113a may rotate in the longitudinal direction.

The suction nozzle 100 may further include an auxiliary hose 123 connecting the connection pipe 120 and the inner pipe 1112 of the housing 110. Accordingly, the air sucked into the housing 110 passes through the auxiliary hose 123, the connection pipe 120, and the extension pipe 17 (see FIG. 1) to the cleaner body 10 (see FIG. 1). Can move to

The auxiliary hose 123 may be made of a flexible material so that the connection pipe 120 can be rotated. In addition, the first connecting member 113a may be formed in a shape surrounding at least a portion 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 provided on the bottom surface of the housing 110. In addition, the front wheels 117a and 117b are provided as a pair, respectively provided on both sides of the front opening 111a, and may be disposed at the rear of the front opening 111a.

The suction nozzle 100 may further include a rear wheel 118. The rear wheel 118 is rotatably provided 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 under the body portion 111. The support member 119 may support the main body 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 part 1192 extending rearward. The rear wheel 118 may be rotatably coupled to the extension part 1192. In addition, the extension part 1192 may support the first connecting member 113a and the second connecting member 113b from the lower side.

The rotation shaft 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, the overturning of the housing 110 during cleaning may be prevented.

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

12 is a view showing a state in which 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 cross-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 rotation cleaning unit 130 is coupled to the main body 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 and a motor supporter 141 for generating 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. A fastening hole 1434 for fastening a bolt with the motor supporter 141 may be formed in the motor 143.

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

The motor 143 may be inserted inside the gear part 145. To this end, a hollow may be formed inside the gear part 145. The gear part 145 may be bolted to the motor supporter 141, and for this purpose, a fastening hole 1454 may be formed at one side of the gear part 145. By integrating the gear portion 145 and the motor 143 with the motor supporter 141, the occurrence of vibration during operation of the motor 143 can be reduced.

The motor supporter 141 may be made of polycarbonate material. The polycarbonate material is characterized by great insulation and impact resistance. Therefore, the motor supporter 141 is resistant to external shocks, and can reduce the transfer of static electricity generated from the outside to the motor 143.

In addition, the inner peripheral surface of the motor supporter 141 is spaced apart from the PCB 1432 of the motor 143. Accordingly, even when the static electricity generated in the main body 111 is transferred to the driving unit 140, the static electricity may not reach the PCB 1432 of the motor 143 and can be discharged naturally, so the motor 143 ) Can protect the PCB 1432.

In addition, the motor supporter 141 is spaced apart from the inner circumferential surface of the first side cover 115. Accordingly, a cooling passage for cooling the driving unit 140 may be secured.

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

The driving part 140 further includes a shaft 148 connected to the gear part 145, and the shaft 148 is connected to the rotation cleaning part 130. The shaft 148 may transmit a driving force transmitted through the gear part 145 to the rotation cleaning part 130. Accordingly, the rotary cleaning unit 130 may rotate.

The driving part 140 may further include a bearing 149 installed on the cover part 147. The bearing 149 is connected to the shaft 148 to fix the shaft 148 in a certain position, while supporting the weight of the shaft 148 and the load applied to the shaft 148, the shaft 148 Can rotate. Accordingly, the shaft 148 can rotate smoothly.

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

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

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

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 rotation axis direction of the rotary cleaning unit 130.

The nozzle body 131 is rotatably installed inside the housing 110 (see FIG. 2 and the like). The nozzle body 131 is provided with at least one protrusion (131a, 131b) on the inner peripheral surface. When the rotary cleaning unit 130 is installed inside the housing, the protrusions 131a and 131b of the nozzle body 131 are engaged with the driving unit 140 (see FIG. 13). Accordingly, the nozzle body 131 may receive rotational driving force from the driving unit.

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

Since the nozzle body 131 rotates at a high speed, minimum durability must be ensured. The minimum thickness of the nozzle body 131 to ensure the minimum durability may be different for each 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 plastic is less than that of metal. Therefore, the minimum thickness of the plastic should be thicker than the minimum thickness of the metal to ensure minimum durability. When the minimum thickness of the nozzle body 131 is thick, the weight is relatively heavy, so the load applied to the motor 143 (see FIG. 12) for rotating the nozzle body 131 is also increased. In addition, an increase in the 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, the aluminum extrusion molding is suitable as a material of the nozzle body 131 because it is light among metals and has sufficient strength.

The fiber layer 134 is formed to surround the outer peripheral surface of the nozzle body 131. However, according to the design, the rotary cleaning unit 130 may not include the fiber layer 134, and 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 circumferential surface of the nozzle body 131. The metal wool 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. In FIG. 15, the fiber wool 132 and the metal wool 133 show a configuration in which the fiber layer 134 is planted.

The fiber wool 132 and the metal wool 133 planted in the fiber layer 134 may be randomly arranged. The fibrous wool 132 may be trimmed without any distinction or uniformity, and the metallic wool 133 may be sparsely dressed between the fibrous wools 132. The number ratio or the 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 to face 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 off debris, dust, and the like present on the floor surface or the carpet.

When the rotating cleaning unit 130 rotates, the fiber wool 132 and the floor (or carpet) to be cleaned collide with each other, and static electricity is generated by friction in the process. If the outer circumferential surface of the rotary cleaning unit 130 is made of only the fiber wool 132 without the metal wool 133, the static electricity is carried on the handle of the cleaner body 10 (see FIG. 1) or a conductor therein (see FIGS. 13 and 1). And to the user.

However, when the metal wool 133 is provided on the rotary cleaning unit 130 as in the present invention, because the metal wool 133 has conductivity, the static electricity generated by the fiber wool 132 is discharged through the metal wool 133 or It can be eliminated. Since the metal wool 133 serves as a charge passage or a static electricity elimination role connected to the floor or carpet, it is possible to prevent the transfer of static electricity to the user. Experimentally, when the rotating cleaning unit is composed of only the fiber wool 132 without the metal wool 133, the amount of static electricity is about 8 kV, but if the rotating cleaning unit 130 includes both the fiber wool 132 and the metal wool 133, the amount of static electricity is 1.6. It was confirmed to decrease to kV.

The fiber wool 132 may be formed of nylon. The metal wool 133 may include a fiber wool such as nylon (133a, see FIG. 16) and a 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 fed into the nozzle body 131 or the fiber layer 134. The metal cap 133 will be described in more detail with reference to FIG. 16.

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

In order to manufacture the rotary cleaning unit 130, first, a metal bristle 133 must be manufactured, and the metal bristle 133 must be planted on the nozzle body 131 or the fiber layer 134 together with the fiber bristles 132.

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

Subsequently, a conductive material is coated on the outer circumferential surface of the fiber wool 133a to form a conductive coating layer 133b. The conductive coating layer 133b may be formed of brass or digenite (Cu9S5).

The average thickness of the conductive coating layer 133b is preferably 0.3 to 1.0 μm. The average thickness (A) of the conductive coating layer 133b refers to the rest of the metal wool 133, excluding the radius of the fiber wool 133a. If the average thickness of the conductive coating layer 133b is thinner than 0.3 μm, it is difficult to play a sufficient role in preventing static electricity. This is because sufficient conductivity is not provided to the metal wool 133. Conversely, when the average thickness of the conductive coating layer 133b exceeds 1.0 µm, friction with the floor or carpet to be cleaned becomes excessively large, making it difficult to clean smoothly.

Next, the fibrous hair 133a having the conductive coating layer 133b is cut to a suitable length for planting. When multiple (bundled) strands are collected and twisted (twist or twist thread), one metal wool 133 is completed.

Finally, the metal wool 133 is planted in the fiber layer 134 together with the fiber wool 132. The fiber wool 132, which is planted together with the metal wool 133, is also formed by twisting a fiber bundle. The fiber layer 134 is formed with a plurality of bristles 135a, 135b capable of grafting the fibrous hair 132 and the metal bristles 133. Each of the implant portions 135a and 135b are arranged to be spaced apart from each other. Each of the head portions 135a and 135b is composed of a hole 135a and a bridge 135b that traverses the hole 135a.

By the bridge 135b, the holes 135a of the implant portions 135a and 135b are divided into two. When the fiber wools 132 and the metal wools 133 to be implanted in one of the bristles 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 Is placed in a position where it meets the bridge 135b. In addition, both ends of the fiber wool 132 and the metal wool 133 extend to face away from the center of the nozzle body 131.

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

The support 136 may determine the arrangement of the fiber wool 132 and the metal wool 133. For example, the support 136 may extend along the longitudinal direction of the nozzle body 131, may extend along the circumferential direction of the nozzle body 131, or extend along the spiral direction of the nozzle body 131. It may be. Accordingly, the fiber wool 132 and the metal wool 133 may 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 + or-pole approaches, the metal wool 133 generates an opposite charge of the-or + pole, and is formed to instantly neutralize static electricity by corona discharge. The metal wool 133 has an effect of removing static electricity by corona discharge.

Furthermore, since the metal wool 133 includes a conductive coating layer 133b formed of diegenite, it has antibacterial and deodorizing performance provided by the diegenite. For example, the metal wool 133 has antibacterial performance against Staphylococcus aureus, pneumonia, E. coli, Pseudomonas aeruginosa, and the like.

In addition, the metal wool 133 has heat storage performance and electromagnetic wave absorption performance provided by dygenite. The heat storage performance means absorbing sunlight or near infrared rays and converting it into heat energy. The electromagnetic wave absorption performance refers to absorption of electromagnetic waves emitted from a mobile terminal or the like and conversion into thermal 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 cleaning performance is lowered because the metal wool 133 is sparsely disposed on the outer circumferential surface of the fiber layer 134. In addition, since the sealing is not sufficiently performed, dust may be generated between the metal wools 133. Conversely, when the average thickness of the metal wool 133 exceeds 260 dTex, the load of the suction motor is excessively increased due to close contact with the body portion 111 (see FIG. 2) of the suction nozzle. In addition, friction with the floor or carpet to be cleaned becomes excessively large, making it difficult to clean smoothly.

It is preferable that the 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 numbers of the fiber wool 132 and the metal wool 133 is 200, the number of the metal wool 133 is preferably 5 or more. When the number ratio of the metal wool 133 is lower than 2.5%, the static electricity transfer prevention or static electricity elimination function is not sufficiently exhibited. On the other hand, when the number ratio of the metal wool 133 increases, the effect of preventing static electricity transmission or the static electricity elimination increases, but the increase is not large. In addition, when the number ratio of the metal wool 133 reaches 25%, the effect of preventing static electricity transmission or static electricity elimination is saturated.

Both the fiber wool 132 and the metal wool 133 have a certain thickness. Therefore, even though it is said that the bristle parts 135a and 135b are spaced apart from each other, the fiber bristle 132 and the metal bristle 133 planted on the bristle parts 135a and 135b cover both the outer circumferential surfaces of the nozzle body 131. Since the fiber wool 132 and the metal wool 133 cover both the outer circumferential surfaces of the nozzle body 131, the number ratio of the metal wool 133 almost coincides with the area ratio. Accordingly, the area ratio of 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 transfer, or the saturation of the static electricity elimination effect is replaced with that described in the repair ratio above.

The electrical resistance of one strand of the metal wool 133 is preferably 100 kΩ or less. The fact that the metal cap 133 is not infinite in electrical resistance means that the metal cap 133 has conductivity. However, when the electrical resistance of one strand of the metal wool 133 exceeds 100 kΩ, the effect of preventing static electricity transmission or removing static electricity is reduced.

The surface resistance value of the rotary cleaning unit 130 including the metal wool 133 is preferably 1 × 102 to 1 × 103 Ω / 10cm. In addition, the resistivity of the metal wool 133 is preferably 1 × 10-1 to 1 × 10-2 Ω / 10cm. The meaning of the surface resistance value and the meaning of the specific resistance value are replaced with a description of the meaning of the electrical resistance of one strand of the metal wool 133.

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

And, the tensile elongation (tensile elongation) of one strand of the metal wool 133 is preferably 33 to 45%. When the rotating cleaning unit 130 rotates, 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 to perform cleaning while tangled with the carpet to be cleaned. However, when the metal wool 133 exceeds 45%, there is a concern that only some of the metal wool 133 in the rotary cleaning unit 130 may be excessively lengthened to form an uneven outer circumferential surface, which may cause a decrease in cleaning performance. Can be.

The specific gravity of the metal wool 133 may be 1.05 to 1.20 g / cm3, and the process moisture content may be 4.5% or less. These conditions are intended to secure optimal static electricity transfer prevention or static electricity elimination effect and optimum cleaning performance.

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

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

The rotating cleaning part 230 includes a strap part 237 and an antistatic part 238. The strap portion 237 and the anti-static portion 238 are divided according to which of the fibrous wool 132 (see FIG. 16) and the metal wool 133 (see FIG. 16) is implanted.

The strap portion 237 is composed of a fiber wool 132. The metal cap 133 is not worn on the strap portion 237.

The antistatic portion 238 is composed of a fiber wool 132 and a metal wool 133. In the number ratio and area ratio of the metal wool 133 described above, each denominator is a sum of both the strap portion 237 and the antistatic portion 238.

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 antistatic portion 238 is disposed between each strap portion 237. Each anti-static portion 238 also extends along the longitudinal direction of the nozzle body 231 like the strap portion 237. The antistatic parts 238 are spaced apart from each other.

The intervals between the strap portions 237 are the same. In addition, the intervals between the antistatic parts 238 are equal to each other. The distance between the strap portion 237 and the antistatic 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.

In Fig. 17, reference numerals 231a and 231b, which are not described, denote protrusions and 234, a fiber layer.

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

The strap portion 337 extends along the circumferential direction of the nozzle body 331. The plurality of strap portions 337 are disposed to be spaced apart from each other. An antistatic 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. The antistatic parts 338 are spaced apart from each other.

The width and spacing of each strap portion 337 are the same. In addition, the width and spacing of each antistatic portion 338 are the same. The width and spacing between the strap portion 337 and the antistatic portion 338 may be the same or different. The strap portion 337 and the anti-static portion 338 may further include a dye coating layer.

Reference numerals 331a and 331b not described in FIG. 18 denote projections, and 334 denotes a fibrous layer.

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

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

Since the strap portion 437 and the anti-static portion 438 extend along a spiral direction, the strap portion 437 is inclined when the rotating cleaning portion 430 is viewed from the front, and the anti-static portion 438 is It is arranged obliquely between.

The width and spacing of each strap portion 437 are the same. In addition, the width and spacing of each antistatic portion 438 are the same. The width and spacing between the strap portion 437 and the antistatic portion 438 may be the same or different. The strap portion 437 and the anti-static portion 438 may further include a dye coating layer.

In Fig. 19, reference numerals 431a and 431b, which are not described, denote protrusions and 434, a fiber layer.

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

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

It has been described that the driving unit 540 is provided with a brushless DC (BLDC) motor, and the driving unit 540 is disposed on 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, the DC motor 543 has an advantage that it is cheaper than the BLDC motor.

If the size of the DC motor 543 is large, space may be insufficient to be installed 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. 20. The driving force generated in the DC motor 543 may be transmitted to the nozzle body 531 through a shaft 548, a gear 545, and the like.

The cover part 547 may be formed to surround the DC motor 543 and the gear 545. The cover part 547 is coupled around the DC motor 543 and supports the DC motor 543.

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

The nozzle body 531 is rotatably supported by the support members 549a, 544, 550. Here, the support members 549a, 544, and 550 are concepts including all configurations for rotatably supporting the nozzle body 531 regardless of its shape or arrangement.

When the support members 549a, 544, 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 occurrence 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 rotating cleaning part 530 includes the brackets 546a and 546b.

Since the bearing parts 549a and 544 and the rotation support part 550 illustrated in FIG. 20 rotatably support the nozzle body 531, they are included in the concept of the support members 549a, 544, and 550, respectively. Hereinafter, the brackets 546a disposed between the bearing parts 549a and 544 and the nozzle body 531 and the brackets 546b disposed between the rotating support part 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 separation.

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

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

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

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, only a part of the plurality of bearings 549a, 549b, and 549c may be provided with a bearing cover 544.

The bearing cover 544 is formed of a material different from the nozzle body 531. It has been described above that the nozzle body 531 may be formed of a metal extrudate. On the other hand, the bearing cover 544 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 occurrence of noise and scratches due to friction between the end of the nozzle body 531 and the bearing 549a. The first bracket 546a is inserted into the end of the nozzle body 531 along the longitudinal direction of the nozzle body 531 (in the horizontal direction in FIG. 20 or in the extension direction of the shaft 548) or the nozzle body by an adhesive It may be bonded to the end of (531).

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

In addition, the first bracket 546a is formed of a plastic injection material. This is because the first bracket 546a should be formed of the same material as the bearing cover 544, so that the occurrence of noise and scratches due to friction between the different materials can be suppressed. However, the same material does not mean the same material.

As 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. Therefore, the bearing covers 544 and the first bracket 546a have mutual contact surfaces S1 and S2. The mutual contact surfaces (S1, S2) are the surfaces of the bearing cover 544 (S1 in FIG. 21) in contact with the first bracket 546a, and the surfaces of the first bracket 546a in contact with the bearing cover 544 (FIG. 21 of S2).

Referring to FIG. 21, the mutual contact surfaces S1 and 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 of 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 during the rotation of the shaft 548 The position of the cover 544 is not fixed. Accordingly, there is a fear that the shaft 548 moves along the longitudinal direction of the nozzle body 531.

Therefore, in order to fix the positions of the bearing 549a and the bearing cover 544 during the rotation process of the shaft 548, the mutual contact surfaces S1 and S2 of the first bracket 546a and the bearing cover 544 are the nozzle body 531 It is preferable to incline with respect to the longitudinal direction of).

In a three-dimensional view, 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 radius of the mutual contact surfaces S1 and S2 may gradually expand toward the outside from the center of the nozzle body 531 along the longitudinal direction. As the radii of the mutual contact surfaces S1 and S2 gradually expand, the mutual contact surfaces S1 and S2 are inclined with respect to the longitudinal direction of the nozzle body 531.

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

The rotation support 550 is coupled to the side cover 516 of the suction nozzle 510. The rotation support part 550 is inserted into one end of the nozzle body 531 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 hole (not shown) corresponding to the shaft 548 may be formed in the second bracket 546b, 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 546b. The rotation support 550 may be fixed to rotate relative to the nozzle body 531, or may be rotated together with the nozzle body 531. If the rotation support 550 is rotated with the nozzle body 531, the driving force of the DC motor 543 is the nozzle body through the shaft 548, the gear 545, the second bracket 546b and the rotation support 550 (531).

The rotation support 550 may be formed of a plastic injection molding. Therefore, when the rotary support 550 and the nozzle body 531 come into direct contact, noise and scratches due to friction between dissimilar materials are generated. Since the second bracket 546b is disposed between the rotation support 550 and the nozzle body 531, it is possible to suppress the occurrence of the noise and scratches. This is because the second bracket 546b is formed of the same material as the rotation support 550. However, the same material does not mean the same material.

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

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

The extension portion 546b2 extends from the nozzle body coupling portion 546b1 along the inner circumferential surface of the nozzle body 531 to the inside of the nozzle body 531. The extension portion 546b2 may contact the inner circumferential surface of the nozzle body 531.

The extension 546b2 may press the inner circumferential surface of the nozzle body 531 in the radial direction (thickness direction from the inner circumferential surface to the outer circumferential 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 greater than the inner diameter of the nozzle body 531, the two portions of the extension portion 546b2 The inner peripheral surface of the silver nozzle body 531 may be pressed in the radial direction. Since the extension portion 546b2 presses the inner circumferential surface of the nozzle body 531, it is possible to prevent the second bracket 546b from being randomly separated from the nozzle body 531.

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

As described above, the nozzle body 531 includes protrusions 531a, 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.

If the second bracket 546b rotates 360 degrees relative to the nozzle body 531, the driving force may not be sufficiently transmitted to the nozzle body 531. For example, a phenomenon in which the nozzle body 531 rotates may occur. This is because the driving force is transmitted to the nozzle body 531 through the second bracket 546b.

In order to prevent this phenomenon, the extension part 546b2 of the second bracket 546b and the protrusion parts 531a and 531b must be in contact. Even if the second bracket 546b and the nozzle body 531 are rotated at a predetermined angle, the extension portion 546b2 may eventually push the protrusions 531a and 531b in the rotational direction of the nozzle body 531 to transmit the driving force. Because. To this end, the projections 531a and 531b and the extension 546b2 should be located on the same plane. Here, the same plane refers to the inner peripheral surface of the nozzle body 531.

20 and 21, reference numeral 515 not described denotes a side cover.

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

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

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

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

The extension portion 546a2 extends from the nozzle body coupling portion 546a1 along the inner circumferential surface of the nozzle body 531 to the inside of the nozzle body 531. The extension 546a2 may contact the inner circumferential 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 illustrated as having four extensions 546a2. Each of the extensions 546a2 may press the inner circumferential surface of the nozzle body 531 in the radial direction (thickness direction from the inner circumferential surface to the outer circumferential surface).

If the distance between the two extensions 546a2 facing each other (distance including the thickness of the extension 546a2) is greater than the inner diameter of the nozzle body 531, the two extensions 546a2 are the inner circumferential surface of the nozzle body 531 Can be pressed in the radial direction. Since the two extensions 546a2 press the inner circumferential surface of the nozzle body 531, it is possible to prevent the first bracket 546a from being randomly separated from the nozzle body 531.

The extension 546a2 is in contact with the protrusions 531a, 531b of the nozzle body 531, and the structure in which the extensions 546a2 press the protrusions 531a, 531b in the rotational direction is also applied to the first bracket 546a. Can be.

The surface contact portion 546a3 protrudes from the inner circumferential surface of the nozzle body coupling portion 546a1. The surface contact portion 546a3 is in surface contact with the bearing portions 549a and 544 to support rotation of the shaft 548 and the bearing portions 549a and 544. Previously, the mutual contact surfaces S1 and S2 of the first bracket 546a and the bearing cover 544 have been described. The mutual contact surface S2 of the first bracket 546a corresponds directly to the surface contact portion 546a3. Therefore, the description of the structure of the surface contact portion 546a3 that is formed to be inclined or extends toward the outside direction is replaced by the previous description.

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

The force applied to the surface contact portion 546a3 as it supports the nozzle body 531 of the surface contact portion 546a3 and the force required to prevent any separation of the first bracket 546a from the nozzle body 531 are first applied. The extension portion 546a2 and the surface contact portion 546a3 may be alternately disposed to evenly distribute the bracket 546a.

Reference numeral 534 not illustrated in FIG. 22 denotes a fiber layer, 537 a strap portion, and 538 an antistatic portion.

The vacuum cleaner described above is not limited to the configuration and method of the above-described embodiments, and the above-described embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

Claims (13)

A cleaner body having a suction motor inside and a handle on the outside; And
It includes a suction nozzle connected to the cleaner body,
The suction nozzle,
A housing in which at least a portion of the front is opened and forms a chamber therein;
A rotating cleaning unit installed in the chamber, at least a part of which is exposed through the opened portion of the housing, and is formed to clean the bottom surface by a rotating operation; And
It is coupled to the housing, and includes a driving unit including a motor located on one side of the rotating cleaning unit and a gear unit transmitting power of the motor to the rotating cleaning unit,
The rotary cleaning unit,
A cylindrical nozzle body rotatably installed in the chamber; And
Protruding to have a rectangular cross-sectional shape from the inner circumferential surface of the nozzle body, and includes a protrusion extending linearly to both ends along the longitudinal direction of the nozzle body,
One side of the projection facing the circumferential direction of the nozzle body, a vacuum cleaner for engaging the driving portion to rotate the rotating cleaning portion.
According to claim 1,
The protrusions are provided in a plurality,
The plurality of protrusions are spaced apart from each other along the circumferential direction of the nozzle body.
According to claim 1,
The nozzle body, a vacuum cleaner formed of a metal extrusion molding.
The method of claim 4,
The metal material is a vacuum cleaner comprising aluminum.
According to claim 1,
The projection, the vacuum cleaner is pressed in the rotational direction of the nozzle body by the rotation of the gear portion.
According to claim 1,
The vacuum cleaner forming the driving portion and the projection portion by the rotation of the gear portion.
The method of claim 6,
The housing, in communication with the opening, includes an internal pipe formed on the rear side of the chamber,
The rotary cleaning unit is a vacuum cleaner that rotates to push in the direction of the inner pipe at the point of contact with the bottom surface.
The method of claim 7,
The housing further includes a first side cover and a second side cover that cover both sides of the chamber.
The method of claim 8,
The suction nozzle further includes a connection pipe connecting the cleaner body and the housing,
The housing, the vacuum cleaner further comprises a connecting member hinged to the connecting pipe.
The method of claim 9,
The connection pipe and the first connection member, a vacuum cleaner rotating in different directions.
The method of claim 10,
The suction nozzle,
A vacuum cleaner further comprising an auxiliary hose connecting the connection pipe and the internal pipe, and wrapping the first connection member so that at least a portion is exposed to the outside.
According to claim 1,
The suction nozzle,
A front wheel rotatably provided on the bottom surface of the housing; And
A vacuum cleaner further comprising a rear wheel disposed behind the front wheel.
According to claim 1,
The rotary cleaning unit,
A vacuum cleaner further comprising a fiber cap and a metal cap disposed on an outer circumferential surface of the nozzle body.

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