CN113027079A

CN113027079A - Paint roller and using method

Info

Publication number: CN113027079A
Application number: CN202110153545.6A
Authority: CN
Inventors: 黄建国
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2021-06-25
Also published as: CN109403595A; CN109403595B

Abstract

The invention provides a paint roller and a using method thereof, and relates to the field of buildings. This paint roller, including cylinder and handle, the cylinder sets up on hand, it has the spraying device to inlay on the cylinder, and the surface of cylinder is provided with rotatable rotation wheel, and the inside of handle is the cavity form, and serves of handle is provided with steering mechanism, fixed connection between steering mechanism and the cylinder, still is provided with the feed cylinder on the handle arm of handle. This paint roller is through setting up feeding mechanism, utilizes the inside electric putter of feeding mechanism to drive the piston and cooperates to make the piston carry out the work of pull, and cooperation check valve and non return device can make paint load the inside that enters into spraying device through the cooperation of pipe and material pipe behind the inside that enters into the feed cylinder, compare with current paint roller, need not make paint adhere to paint roller's inside in the inside that inserts the paint kettle repeatedly with paint roller.

Description

Paint roller and using method

The invention relates to a divisional application of a paint roller, which has an application date of 2018, 10 and 19 months and an application number of CN201811219795. X.

Technical Field

The invention relates to the technical field of buildings, in particular to a paint roller and a using method thereof.

Background

The paint roller is a tool commonly used for painting in home decoration at present, and the working mode of the paint roller is that the paint roller is placed in a paint bucket and then is painted on a wall, so that the painting work is carried out.

But the working mode of the existing paint roller is backward, and the following defects exist, which causes the inconvenience when the existing paint roller is used:

1. the inside of putting into the paint kettle with the cylinder that current paint roller need relapse makes paint attach to its surface, and this leads to current paint kettle very waste time and energy when using, and is very inconvenient to the paint that is located the paint kettle bottom also hardly makes it attach to the paint roller completely, causes the waste of raw materials.

2. When the existing paint bucket is used, partial paint of the paint bucket can drip due to gravity when being smeared, the environment during decoration can be seriously influenced, and meanwhile, the waste of the paint can be caused.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a paint roller, which solves the problems of backward working mode and inconvenient use of the prior paint roller in the background technology.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a paint roller, includes cylinder and handle, and the cylinder sets up on hand, it has spraying device to inlay on the cylinder, and the surface of cylinder is provided with rotatable rotation wheel, and the inside of handle is the cavity form, and one of handle is served and is provided with steering mechanism, fixed connection between steering mechanism and the cylinder, still be provided with the feed cylinder on the handle arm of handle, the feed cylinder passes through the inner chamber intercommunication of pipe with the handle, still run through on hand and be provided with the material pipe, the one end of material pipe runs through the inside that enters into the cylinder and communicates with spraying device, fixed mounting has feeding mechanism in the inner chamber of handle, material pipe and pipe communicate through feeding mechanism.

Preferably, the bearing is inlayed to the surface of cylinder, and the surface of bearing and the inner wall welding of rotating the wheel rotate the surface of wheel and personally submit the mat surface setting, and the spraying device comprises shower nozzle and defeated material bucket, and shower nozzle and defeated material bucket run through the setting respectively in the front of cylinder and the one end of cylinder.

Preferably, a nozzle is arranged on the spray head in a penetrating mode, a cavity enabling two ends of the nozzle to be communicated is formed in the nozzle, a discharge pipe is arranged on one side of the spray head in a penetrating mode, the other end of the discharge pipe is communicated with the material conveying barrel, and one end of the material pipe is connected to the material conveying barrel in an inserting mode and communicated with an inner cavity of the material conveying barrel.

Preferably, the cavity consists of a section of truncated cone-shaped chamber and a section of cylindrical chamber communicated with the truncated cone-shaped chamber, and the nozzles are equidistantly arranged on the spray head at intervals of 2 cm.

Preferably, the inside of cylinder and the below fixed mounting that is located the shower nozzle have air-dry the device, air-dry the device and include the intake pipe, the intake pipe runs through the one end that sets up at the cylinder, the one end of intake pipe and the input port intercommunication of miniature negative pressure pump, miniature negative pressure pump fixed mounting is at the inner chamber of cylinder, and communicates through the trachea between the delivery outlet of miniature negative pressure pump and the box body, the box body is inlayed on the cylinder and is located the below of shower nozzle, and the rectangle air outlet of rectangular shape is seted up in the front of box body.

Preferably, the top of handle is inlayed and is had the hook-shaped pole, the one end of hook-shaped pole runs through the one end of cylinder and extends to the inner chamber of cylinder, the hook-shaped pole inserts one of cylinder and serves the welding and have the connecting plate, there is miniature step motor one side of connecting plate through bolt fixed mounting, the external fixed surface of miniature step motor output end installs the connecting piece, the connecting piece includes go-between and connecting rod, the connecting rod is the annular welding on the curved surface of go-between, and the connecting rod keeps away from the one end welding of go-between on the inner wall of cylinder, the fixed cup joint of go-between.

Preferably, feeding mechanism includes the shell, and the inside welding of shell has the inner bag, and material pipe and pipe all insert the inside of inner bag, and are provided with the check valve on the pipe, and the inside of material pipe is provided with non return device, and the bottom of inner bag is run through and is provided with the sleeve pipe, and sheathed tube inside slidable mounting has the piston, the bottom of piston and electric putter's top fixed connection, fixed connection between electric putter's bottom and the inner wall bottom of shell.

Preferably, non return device includes the rubber sleeve, and the inside slidable mounting of rubber sleeve has the rubber buffer, and has seted up the through-hole on the rubber sleeve, and the through-hole is located the top of rubber buffer, and the inside of rubber sleeve and the below that is located the rubber buffer is provided with the rubber ring, and the rubber buffer overlap joint is in the top of rubber ring.

Preferably, a control panel is arranged on the handle and is electrically connected with the electric push rod, the miniature negative pressure pump and the miniature stepping motor respectively.

(III) advantageous effects

The invention provides a paint roller. The method has the following beneficial effects:

1. this paint roller is through setting up feeding mechanism, utilizes the inside electric putter of feeding mechanism to drive the piston and cooperates to make the piston carry out the work of pull, and cooperation check valve and non return device can make paint load the inside that enters into spraying device through the cooperation of pipe and material pipe behind the inside that enters into the feed cylinder, compare with current paint roller, need not make paint adhere to paint roller's inside in the inside that inserts the paint kettle repeatedly with paint roller.

2. This paint roller is through improving the cylinder, and paint no longer adheres to the surface at the cylinder, makes this paint roller can not appear paint because the condition that drips appears in gravity in the in-process of using, thereby it leads to the raw materials extravagant to have solved current paint and take place to drip easily to cause certain influence to workman's operational environment.

3. This kind of paint roller is through improving the cylinder, through set up spraying device on the cylinder to make paint spray the wall on, thereby make worker's people can avoid the problem that paint falls when carrying out work, and the spraying also more even.

4. This paint roller sets up a can pivoted rotation wheel through the surface at the cylinder to make the cylinder remove more light convenience at the in-process that carries out the spraying, rotate the wheel simultaneously and also make spraying device not contact with the wall, avoided the wall to block up the nozzle on the spraying device.

5. This paint roller is through setting up steering mechanism, controls through step motor and makes steering mechanism drive the cylinder and rotate, and the direction that can make the spraying device spraying after the cylinder rotates changes to make the user can carry out the spraying work of paint to the wall of each angle or roof, application range is wider.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the drum of the present invention;

FIG. 3 is a side cross-sectional view of a showerhead of the present invention;

FIG. 4 is a partial cross-sectional view of the handle of the present invention;

FIG. 5 is a sectional view showing the structure of the feeding device of the present invention;

fig. 6 is a cross-sectional view of the construction of the no-return device of the present invention.

The device comprises a roller 1, a handle 2, a spraying device 3, a spray head 301, a feed delivery cylinder 302, a steering mechanism 4, a rotating wheel 5, a feed cylinder 6, a control panel 7, a feed pipe 8, a bearing 9, a nozzle 10, a cavity 11, a discharge pipe 12, an air drying device 13, an air inlet pipe 131, a micro negative pressure pump 132, a box 133, an air pipe 134, an air outlet 135, a hook-shaped rod 14, a connecting plate 15, a micro stepping motor 16, a connecting piece 17, a connecting ring 171, a connecting rod 172, a feeding mechanism 18, a housing 181, an inner container 182, a sleeve 183, a piston 184, an electric push rod 185, a conduit 19, a check valve 20, a check device 21, a rubber sleeve 211, a rubber.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a paint roller, as shown in figures 1, 2 and 4, comprising a roller 1 and a handle 2, wherein the roller 1 is arranged on the handle 2, a control panel 7 is arranged on the handle 2, a spraying device 3 is embedded on the roller 1, a rotatable rotating wheel 5 is arranged on the outer surface of the roller 1, the interior of the handle 2 is hollow, a steering mechanism 4 is arranged at one end of the handle 2, the steering mechanism 4 is fixedly connected with the roller 1, a charging barrel 6 is also arranged on a handle arm of the handle 2, the charging barrel 6 is used for filling paint, the top of the charging barrel 6 is open and is provided with a sealing cover in a threaded manner, an air hole communicated with air is arranged at the top of the sealing cover, a check valve is also arranged in the air hole, so that the outside air can enter, the inside air and the paint cannot be discharged through the air hole, the charging barrel 6 is communicated with the inner cavity of the handle 2 through, still run through on the handle 2 and be provided with material pipe 8, the one end of material pipe 8 runs through the inside that enters into cylinder 1 and communicates with spraying device 3, fixed mounting has feeding mechanism 18 in the inner chamber of handle 2, material pipe 8 and pipe 19 communicate through feeding mechanism 18, when using, at first pour paint into the inside of feed cylinder 6 into, then closed sealed lid, control feeding mechanism 18 through control panel 7 and carry the inside of spraying device 3 with paint, through spraying device 3 with paint on the wall, can need not dip in paint repeatedly on cylinder 1, it is simple and convenient during the operation, and can also avoid paint to appear the phenomenon that drips smearing the in-process.

As shown in fig. 2 and 3, a bearing 9 is embedded on the outer surface of the roller 1, the outer surface of the bearing 9 is welded with the inner wall of the rotating wheel 5, the outer surface of the rotating wheel 5 is arranged in a rough surface manner, the rotating wheel 5 is sleeved on the outer surface of the roller 1 through the arrangement of the bearing 9, and the roller 1 can easily move on the wall under the condition that the roller 1 does not rotate, the spraying device 3 comprises a spraying head 301 and a material conveying barrel 302, the spraying head 301 and the material conveying barrel 302 are respectively arranged on the front surface of the roller 1 and one end of the roller 1 in a penetrating manner, a nozzle 10 is arranged on the spraying head 301 in a penetrating manner, a cavity 11 which enables two ends of the nozzle 10 to be communicated is arranged on the nozzle 10, a discharging pipe 12 is arranged on one side of the spraying head 301 in a penetrating manner, the other end of the discharging pipe 12 is communicated with the material conveying barrel 302, one end of the material pipe 8 is inserted on the material conveying barrel 302 and is communicated with the inner cavity of the material conveying barrel, and the nozzles 10 are arranged on the spray head 301 at equal intervals of 2 cm, through which paint passes during use.

As shown in fig. 2, the inside of the roller 1 and the below fixed mounting that is located the shower nozzle 301 have air-dry device 13, air-dry device 13 includes intake pipe 131, intake pipe 131 runs through the one end that sets up at the roller 1, the one end of intake pipe 131 communicates with the input port of miniature negative pressure pump 132, miniature negative pressure pump 132 fixed mounting is in the inner chamber of roller 1, and communicate through trachea 134 between the delivery outlet of miniature negative pressure pump 132 and the box 133, the box 133 is inlayed on the roller 1 and is located the below of shower nozzle 301, and rectangular air outlet 135 of rectangular shape is seted up on the front of box 133, miniature negative pressure pump 132 is controlled by control panel 7 and is started.

The top of handle 2 is inlayed and is had hook-shaped pole 14, hook-shaped pole 14's one end runs through the one end of cylinder 1 and extends to the inner chamber of cylinder 1, hook-shaped pole 14 inserts one of cylinder 1 and serves the welding and have connecting plate 15, there is miniature step motor 16 one side of connecting plate 15 through bolt fixed mounting, the outer fixed surface of miniature step motor 16 output end installs connecting piece 17, connecting piece 17 includes connecting ring 171 and connecting rod 172, connecting rod 172 is the annular welding on the curved surface of connecting ring 171, and the connecting rod 172 is kept away from the one end welding of connecting ring 171 on the inner wall of cylinder 1, the fixed external surface at miniature step motor 16 output shaft of connecting ring 171 of cup joint, miniature step motor 16 is controlled by control panel.

As shown in fig. 5, the feeding mechanism 18 includes a housing 181, an inner container 182 is welded inside the housing 181, the material tube 8 and the conduit 19 are both inserted into the inner container 182, a check valve 20 is disposed on the conduit 19, a check device 21 is disposed inside the material tube 8, a sleeve 183 is disposed at the bottom of the inner container 182 in a penetrating manner, a piston 184 is slidably disposed inside the sleeve 183, the bottom of the piston 184 is fixedly connected to the top end of an electric push rod 185, and the bottom end of the electric push rod 185 is fixedly connected to the bottom of the inner wall of the housing 181.

As shown in fig. 6, the non-return device 21 includes a rubber sleeve 211, a rubber plug 212 is slidably mounted inside the rubber sleeve 211, a through hole is formed in the rubber sleeve 211, the through hole is located above the rubber plug 212, a rubber ring 213 is disposed inside the rubber sleeve 211 and below the rubber plug 212, the rubber plug 212 is lapped above the rubber ring 213, and the control panel 7 is electrically connected to the electric push rod 185. When the paint spraying device is used, firstly paint coating is poured into the interior of the material cylinder 6, the paint poured into the interior of the material cylinder 6 enters the inner container 182 through the material pipe 8, then the sealing cover of the material cylinder 6 is closed to seal the material cylinder 6, when the paint is required to be coated, the control panel 7 opens the electric push rod 185, after the electric push rod 185 is opened, the electric push rod 185 makes reciprocating telescopic motion, the electric push rod 185 pushes the piston 184 to work when working, when the electric push rod 185 extends to push the piston 184 to move upwards, the paint entering the interior of the inner container 182 through the material pipe 8 is hydraulically raised, and due to the limitation of the check valve on the sealing cover, the paint cannot be discharged through the air hole, so the paint enters the interior of the guide pipe 19 through the check device 21 and finally reaches the interior of the spraying device 3, and the paint pushes the rubber plug 212 of the check device 21 to move upwards under the, when the rubber stopper 212 moves upwards and exceeds the position of the through hole, paint enters the inside of the conduit 19 through the through hole, the electric push rod 185 shortens to drive the piston 184 to move downwards, when the piston 184 moves downwards, the pressure in the space inside the inner container 182 is increased and reduced, so that the paint inside the barrel 6 enters the inside of the inner container 182 through the material pipe 8, and outside air enters the inside of the barrel 6 through the air hole in the sealing cover, and when the piston 184 moves downwards, the rubber stopper 212 moves downwards, and when the rubber stopper 212 moves downwards, the rubber stopper 212 overlaps the rubber ring 213, so that the rubber sleeve 211 is blocked by the matching of the rubber stopper 212 and the rubber ring 213, and the paint entering the inside of the conduit 19 cannot enter the inner container 182 again.

After paint entered into spraying device 3's inside through pipe 19, paint at first can enter into the inside of defeated feed cylinder 302, enter into the inside of shower nozzle 301 through defeated feed cylinder 302, after paint entered into the inside of shower nozzle 301, can enter into the inside of nozzle 10, the design of cavity in the nozzle 10, make paint hydraulic pressure reinforcing behind the inside that gets into the nozzle, thereby make more powerful when paint sprays out, can effectually avoid when spraying because pressure is not enough, lead to paint the phenomenon that the low falls to appear.

When paint is sprayed, the roller 1 is attached to a wall, the nozzle of the spraying device 3 is aligned to the wall 10, then the paint is conveyed to the inside of the spraying device 3 through the feeding mechanism 18, the paint is sprayed out through the spraying device 3, the paint is sprayed onto the wall through the spraying device 3, so that the paint is attached to the wall, and after the paint is sprayed, the air drying device 13 is used for quickly drying the paint (when the air drying device 13 works, the micro negative pressure pump 132 generates suction force, so that air enters the inside of the micro negative pressure pump 132 through the air inlet pipe 131, then enters the inside of the box body 133 through the air pipe 134, and is discharged through the rectangular air outlet 135 on the box body 133 to dry the paint, the width of the rectangular air outlet 135 is the same as that of the nozzle 10 of the spraying device 3, so that the sprayed paint can all have the same air drying effect), the drying speed of the paint is increased, and the condition that the humidity of the paint is heavier and falls is avoided.

And this paint roller is through setting up miniature step motor 16, and miniature step motor 16 cooperation connecting piece 17 drives roller 1 and rotates to can adjust the direction of spraying device 3 on the roller 1, when the spraying of paint is carried out to the roof to needs, start through miniature step motor 16 and drive go-between 171 and rotate, thereby go-between 171 drives connecting rod 172 and makes roller 1 rotate, has reached the pivoted purpose of adjusting roller 1.

The outer surface of the roller 1 is movably provided with a rotating wheel 5 through a bearing, so that the roller can move on the wall more flexibly under the condition of not rotating.

To sum up, this kind of paint roller is through setting up feeding mechanism 18, utilizes feeding mechanism 18 inside electric putter 185 to drive piston 184 and cooperates to make piston 184 carry out the work of pull, and cooperation check valve 20 and non return device 21, can make paint load enter into the inside of feed cylinder 6 after the inside through the cooperation of pipe 8 and material pipe 19 and enter into the inside of spraying device 3, compare with current paint roller, need not make paint adhere to the inside of paint roller in the inside of repeated paint roller inserting the paint bucket.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a paint roller, includes cylinder (1) and handle (2), and cylinder (1) sets up on handle (2), its characterized in that: the spraying device is characterized in that a spraying device (3) is inlaid in the roller (1), a rotatable rotating wheel (5) is arranged on the outer surface of the roller (1), the interior of the handle (2) is hollow, a steering mechanism (4) is arranged at one end of the handle (2), the steering mechanism (4) is fixedly connected with the roller (1), a charging barrel (6) is further arranged on a handle arm of the handle (2), the charging barrel (6) is communicated with the inner cavity of the handle (2) through a conduit (19), a material pipe (8) is further arranged on the handle (2) in a penetrating mode, one end of the material pipe (8) penetrates into the interior of the roller (1) and is communicated with the spraying device (3), a feeding mechanism (18) is fixedly arranged in the inner cavity of the handle (2), and the material pipe (8) is communicated with the conduit (19) through the feeding mechanism (18);

the outer surface of the roller (1) is embedded with a bearing (9), the outer surface of the bearing (9) is welded with the inner wall of the rotating wheel (5), the outer surface of the rotating wheel (5) is arranged in a rough surface mode, the spraying device (3) is composed of a spray head (301) and a material conveying barrel (302), and the spray head (301) and the material conveying barrel (302) are respectively arranged on the front surface of the roller (1) and one end of the roller (1) in a penetrating mode;

a spray nozzle (10) penetrates through the spray head (301), a cavity (11) enabling two ends of the spray nozzle (10) to be communicated is formed in the spray nozzle (10), a discharge pipe (12) penetrates through one side of the spray head (301), the other end of the discharge pipe (12) is communicated with the material conveying barrel (302), and one end of a material pipe (8) is inserted into the material conveying barrel (302) and communicated with an inner cavity of the material conveying barrel (302);

an air drying device (13) is fixedly mounted inside the roller (1) and below the spray head (301), the air drying device (13) comprises an air inlet pipe (131), the air inlet pipe (131) penetrates through one end of the roller (1), one end of the air inlet pipe (131) is communicated with an input port of the miniature negative pressure pump (132), the miniature negative pressure pump (132) is fixedly mounted in an inner cavity of the roller (1), an output port of the miniature negative pressure pump (132) is communicated with the box body (133) through an air pipe (134), the box body (133) is embedded in the roller (1) and is located below the spray head (301), and a long-strip-shaped rectangular air outlet (135) is formed in the front surface of the box body (133);

a hook-shaped rod (14) is inlaid at the top end of the handle (2), one end of the hook-shaped rod (14) penetrates through one end of the roller (1) and extends into an inner cavity of the roller (1), a connecting plate (15) is welded to one end, inserted into the roller (1), of the hook-shaped rod (14), a micro stepping motor (16) is fixedly installed on one side of the connecting plate (15) through a bolt, a connecting piece (17) is fixedly installed on the outer surface of the output end of the micro stepping motor (16), the connecting piece (17) comprises a connecting ring (171) and a connecting rod (172), the connecting rod (172) is annularly welded on the curved surface of the connecting ring (171), one end, far away from the connecting ring (171), of the connecting rod (172) is welded on the inner wall of the roller (1), and the connecting ring (171);

the feeding mechanism (18) comprises a shell (181), an inner container (182) is welded in the shell (181), a material pipe (8) and a guide pipe (19) are inserted into the inner container (182), a check valve (20) is arranged on the guide pipe (19), a check device (21) is arranged in the material pipe (8), a sleeve (183) penetrates through the bottom of the inner container (182), a piston (184) is slidably arranged in the sleeve (183), the bottom of the piston (184) is fixedly connected with the top end of an electric push rod (185), and the bottom end of the electric push rod (185) is fixedly connected with the bottom of the inner wall of the shell (181);

the non-return device (21) comprises a rubber sleeve (211), a rubber plug (212) is slidably mounted inside the rubber sleeve (211), a through hole is formed in the rubber sleeve (211), the through hole is located above the rubber plug (212), a rubber ring (213) is arranged inside the rubber sleeve (211) and below the rubber plug (212), and the rubber plug (212) is lapped above the rubber ring (213);

the cavity (11) consists of a section of truncated cone-shaped cavity and a section of cylindrical cavity communicated with the truncated cone-shaped cavity, and the nozzles (10) are equidistantly arranged on the spray head (301) at intervals of 2 cm;

the handle (2) is provided with a control panel (7), and the control panel (7) is respectively and electrically connected with the electric push rod (185), the micro negative pressure pump (132) and the micro stepping motor (16).

2. A paint roller and method of use according to claim 1 wherein: when paint is sprayed, the roller (1) is attached to a wall, a nozzle of the spraying device (3) is aligned with the wall in a facing mode (10), then the paint is conveyed to the inside of the spraying device (3) through the feeding mechanism (18) and sprayed out through the spraying device (3) to be sprayed, the paint is sprayed onto the wall through the spraying device (3), the paint is attached to the wall, and an air drying device (13) is used for quickly drying the paint after the paint is sprayed;

when the air drying device (13) works, the micro negative pressure pump (132) generates suction, so that air enters the interior of the micro negative pressure pump (132) through the air inlet pipe (131), then enters the interior of the box body (133) through the air pipe (134), and is discharged through the rectangular air outlet (135) in the box body (133) to air-dry paint, the width of the rectangular air outlet (135) is the same as that of the spray head (10) of the spraying device (3), so that the sprayed paint can be uniformly subjected to air-drying effect, the drying speed of the paint is increased, and the condition that the humidity of the paint is heavy and falls is avoided;

the paint roller is provided with the micro stepping motor (16), the micro stepping motor (16) is matched with the connecting piece (17) to drive the roller (1) to rotate, so that the direction of the spraying device (3) on the roller (1) can be adjusted, when the roof is required to be sprayed with paint, the micro stepping motor (16) is started to drive the connecting ring (171) to rotate, the connecting ring (171) drives the connecting rod (172) to rotate the roller (1), and the aim of adjusting the rotation of the roller (1) is fulfilled;

the outer surface of the roller (1) is movably provided with a rotating wheel (5) through a bearing, so that the roller can move on the wall more flexibly under the condition of not rotating.