The present invention relates generally to a device or apparatus for cleaning the surface of an electronic device screen, such as a touch screen.

BACKGROUND

Hand-held computing devices and smart phones have become increasingly popular in recent years. One common problem with these devices is that the interface or screen can easily become dirty due to being routinely touched. The same problem occurs with the displays of the navigation and audio systems or multimedia touch screens in motor vehicles such as cars, buses and airplanes. This does not only detracts from the appearance of the device and obscures the viewability of the screen, but may also make the device less responsive to user input due to interference.

One approach to address this problem has been to clean the screen of these devices such as smartphones and tablets, and of various electronic devices such as LED screen televisions with a microfiber cloth manually. However, manual cleaning articles and devices do not provide an effective cleaning.

US 2014/0165315 A1 discloses a cleaning device for cleaning screens of electronic devices. The device includes a roller encompassed by a housing with a retractable cover. The roller has a tacky, adhesive surface. In order to clean the surface of a screen a user holds the device and rolls the roller manually across the screen to be cleaned. The cleaning performance of this device is not sufficient as it makes use of a manual rolling action with a roller.

US 2012/0192372 A1 discloses a device or apparatus for wiping and/or cleaning an electronic screen. The device or apparatus comprises a blade and a blade fabric to clean the display screens of electronic devices. The user manually cleans a screen by wiping it with the blade fabric. A manual cleaning with only wiping by utilizing a hand movement does not provide an effective cleaning. Moreover the disclosed device does not allow an easy replacement of the blade fabric as it is secured, such as by gluing, taping, etc., to a portion of the device or apparatus.

Thus, there remains a need in the art for an improved article or device for cleaning electronic device screens that does not require cleaning efforts of their users to achieve an improved cleaning and that is simple to use, easy to carry and inexpensive to produce.

It is an aim of the present invention to provide a small, compact cleaning device or apparatus for cleaning the screens of various electronic devices which alleviates the above problems, and which greatly increases the quality of cleaning, while also decreasing the time required to achieve clean screens.

SUMMARY

Based on the foregoing, it is a primary object of the present invention is to provide a cleaning device and apparatus which improves cleaning efficiency by automation the screen cleaning procedure.

One another object of the present invention is to provide a cleaning device and apparatus which provides a better screen cleaning effect.

Another object of the present invention is to provide a motorized cleaning device and apparatus in which the drive means is fully or partly enclosed inside the cleaning roller where it can be protected from dust, moisture, and other foreign substances.

Another object of the present invention is to provide a cleaning device and apparatus which can be easily cleaned and be reusable. Another object of the present invention is to provide a motorized cleaning device and apparatus which is constructed in such a manner that the drive means can be easily reached for repair and replacement.

Still another object of the present invention is to provide a rechargeable cleaning device and apparatus.

Another object of the present invention is to provide a compact device and apparatus which can be stored in a user’s pocket or bag or a glove box of a motor vehicle.

Other objects and advantages of the present invention will become apparent and obvious from a study of the following description and the accompanying drawings which are merely illustrative of such invention.

One aspect of the present invention relates to a motorized cleaning device for cleaning a surface, comprising at least one cleaning roller, a cover element for covering and supporting at least a part of the at least one cleaning roller and means for rotatably mounting the at least one cleaning roller inside the cover element. The cleaning device further comprising: drive means for driving the at least one cleaning roller, wherein the drive means comprise a motor , a cleaning cloth positioned on the exterior of the at least one cleaning roller, for cleaning a surface on which the at least one cleaning roller rolls.

Another aspect of the present invention relates to a motorized cleaning device for cleaning a surface, comprising at least one cleaning roller, a cover element for covering and supporting at least a part of the at least one cleaning roller and means for rotatably mounting the at least one cleaning roller inside the cover element. The cleaning device further comprising: drive means for driving the cleaning rollers, wherein the drive means comprise a motor and a rechargeable battery for supplying power to the motor; a cleaning cloth positioned on the exterior of the cleaning rollers, for cleaning a surface on which the cleaning rollers roll; wherein the first cleaning roller includes a motor housing in which the motor is mounted in a non-rotatable manner and the second cleaning roller includes a battery housing in which the rechargeable battery is mounted in a non-rotatable manner, wherein the drive means includes a drive shaft configured for engaging and rotating the first cleaning roller, wherein the battery housing includes a female component configured for engaging and rotating the second cleaning roller.

One another aspect of the present invention relates to a motorized cleaning apparatus for cleaning a surface, comprising at least one cleaning roller, a cover element for covering and supporting at least a part of the at least one cleaning roller and means for rotatably mounting the at least one cleaning roller inside the cover element, drive means for driving the at least one cleaning roller, wherein the drive means comprise a motor, a cleaning cloth positioned on the exterior of the at least one cleaning roller, for cleaning a surface on which the at least one cleaning roller rolls further comprising a lower cover element.

BRIEF DESCRIPTION OF FIGURES

Figure 1 is a perspective view of an embodiment of the cleaning device.

Figure 2 is an exploded view of an embodiment of the cleaning device.

Figure 3a is a side view of an embodiment of the cleaning device.

Fig 3b is a cross sectional view of an embodiment of the first cleaning roller of the cleaning device.

Figure 4a is a front view of an embodiment of the cleaning device. Figure 4b is a cross sectional view of an embodiment of the first and second cleaning rollers.

Figure 5a is a perspective view of a hollow roller tube of an embodiment of the cleaning device.

Figure 5b is a cross sectional view of a hollow roller of an embodiment of the cleaning device. Figure 6a is a perspective view of an embodiment of the cleaning device.

Figure 6b is a cross sectional front view of an embodiment of the cleaning device.

Figure 7a is a front view of an embodiment of the cleaning device during the release of the cleaning rollers.

Figure 7b is a side view of an embodiment of the cleaning device during the release of the cleaning rollers. REFERENCE NUMBERS

100 Cleaning device 410 Motor

120 Upper cover element 420 Electrical conductor means

121 Front wall 430 Drive shaft

122 Rear wall 440 Rechargeable battery

123 Top part 450 Electrical conductor means

130 End cap 460 Conductor part

131 Sleeve portion 461 Coupling means 40 Bearing 500 Gear arrangement 00 First cleaning roller 510a , Large gear

520a 10 Cleaning cloth 510b , Small gear

520b 11 Hollow roller tube 530 Mounting shaft 12 Hollow inner tube 540 Gear carrier 13 Hollow outer tube 541 Gear journal

220 Bore 550 Gear bearing

221 Front opening 600 Shaft carrier

222 Rear opening 610 Compartment

230 Motor housing 620 Bar

231 Motor housing shaft 630 Circuit card holder

232 Bore 700 Lower cover element

233 Protrusion 710 Roller housing

234 Bearing 720 Brush

240 Internal constraint 730 Base portion

A, B Compartment 731 Bottom surface

300 Second cleaning roller

310 Cleaning cloth

311 Hollow roller tube 312 Hollow inner tube

313 Hollow outer tube

320 Bore

321 Front opening

322 Rear opening

330 Battery housing

331 Female component

332 Male component

333 Front shaft of the battery housing

334 Bore

335 Rear shaft of the battery housing

DETAILED DESCRIPTION OF THE INVENTION

The detailed description set forth below in connection with the appended drawings is intended as a description of various embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced. The detailed description includes specific details for the purpose of providing an understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without these specific details.

The present invention relates generally to a cleaning device or apparatus for cleaning surfaces, for example the screen of an electronic or computerized device, such as a touch screen of a smartphone or a multimedia touch screen in a car. The device is conveniently sized and shaped to be easily and comfortably carried or transported by a user, such as in the user’s bag. The device is also configured to have a no sharp edge to touch onto the screen during cleaning. The cleaning device (100) of the present invention generally includes at least one cleaning roller (200, 300), an upper cover element (120) for covering at least a part of the at least one cleaning roller (200, 300) and means for rotatably mounting the at least one cleaning roller (200, 300) inside the upper cover element (120). The cleaning apparatus of the present invention generally includes the cleaning device (100) and a lower cover element (700) for protecting the cleaning device (100) from dirt and smudge and cleaning the at least one cleaning roller (200, 300).

The cleaning device (100) is intended to be held between the user’s thumb and index finger thereby allowing accurate control of the cleaning device (100) during operation. The upper cover element (120) is sized appropriately for gripping by the fingers and/or the hand of a user. The upper cover element (120) may be made of any suitable material that is hard and solid, such as plastic, metal, such as aluminium or steel, etc. The upper cover element (120) covers at least a part of the at least one cleaning roller (200, 300). Thus the upper cover element (120) enables a user to control the cleaning device (100) by the hand of a user. The upper cover element (120) also protects the cleaning roller (200, 300) from dirt and smudge. The upper cover element (120) may be a one-piece molded part having a front wall (121) and a rear wall (122) extending downwardly from a rectangular top part (123). The upper cover element (120) has sufficient sizes to accommodate one or more cleaning roller(s) (200, 300). In an embodiment of the present invention the cleaning device (100) has more than one cleaning rollers (200, 300) positioned in a desired orientation. In a preferred embodiment of the present invention the cleaning rollers (200, 300) are preferably positioned in parallel to one another. Thus the upper cover element (120) has a substantially rectangular top part (123) to cover at least a part of the cleaning rollers (200, 300). The at least one cleaning roller (200, 300) is rotatably mounted to the upper cover element (120) of the cleaning device (100). The means for rotatably mounting the at least one cleaning roller (200, 300) may comprise at least one end cap (130) disposed at one end of the cleaning roller (200, 300), at least one bearing (140) in which respective end cap (130) is disposed and at least one mounting shaft (530, 540) rotatably journaled in respective bearing (140) and projecting axially from one end of the at least one cleaning roller (200, 300). The at least one end cap (130) includes a sleeve portion (131) having an outside diameter approximately equal to the inside diameter of respective bearing (140) and should preferably provide a snug fit. In a similar manner the at least one bearing (140) has an outside diameter approximately equal to the inside diameter of respective cleaning roller (200, 300). The bearing (140) provides a stable rotation of the at least one cleaning roller (200, 300).

In one embodiment at least one cleaning roller (200, 300) is mounted inside the upper cover element (120) through the front wall (121) at one end and through the rear wall (122) at the other end. In order to avoid the hard upper cover element (120) from scratching the screen surface during cleaning operation, the outer surface of the at least one cleaning roller (200, 300) should project a radial distance beyond the edges of the upper cover element (120). There is a gap between the exterior of the at least one cleaning roller (200, 300) and the inside surface of the upper cover element (120) to allow the cleaning roller (200, 300) to freely rotate. The at least one cleaning roller (200, 300) has an hollow roller tube (211, 311) and a cleaning cloth (210, 310) positioned on the exterior of the hollow roller tube (211, 311). The cleaning cloth (210, 310) can directly rolls across the screen and cleans it during cleaning operation. The microfiber cloth is especially useful for cleaning fingerprints and smudges from a screen of an electronic device. The cleaning cloth (210) may potentially include any suitable fabric or cloth for cleaning the surface of a screen without scratching or damaging it. According to many preferred embodiments, the cleaning cloth (210) comprises a microfiber material. The microfiber may be made of high gloss (glossy) thread fibers having a sleek, smooth and satin-like feel. The microfiber cleaning cloth (210) may comprise a combination of polyester and polyamide fibers, such as split corrugated fibers, which may be in ranges from about 20% to about 30% polyamide fiber and from about 70% to about 80%polyester. In a preferred embodiment the microfiber cleaning cloth (210) comprises ultra microfiber cloth material such as ultra-microfiber nonwoven fabric and elastomer. The hollow roller tube (211, 311) of at least one cleaning roller (200, 300) is preferably around nine to fifteen centimeters in length and has an outer diameter of around three to five centimeters.

The cleaning device (100) includes a drive means for driving the at least one cleaning roller (200, 300). The drive means of the present invention enables the at least one cleaning roller (200, 300) to be driven at speeds of 300-500 rpm and preferably 300-400 rpm, which decreases cleaning time and improves cleaning.

FIGS. 1-5 illustrate a preferred embodiment of the present invention. FIG. 2 provides a perspective view of the device embodiment of the present invention including two cleaning rollers, i.e. a first cleaning roller (200) and a second cleaning roller (300) configured to rotate in opposite directions and means for rotatably mounting these cleaning rollers (200, 300) inside the upper cover element (120). According to this embodiment, the first cleaning roller (200) and the second cleaning roller (300) have complementary roles during a cleaning operation. For example, the first cleaning roller (200) can roll in the direction of the translational movement of the cleaning device (100) on the surface, that is transferred by the user’s hand during cleaning operation and the second cleaning roller (300) can roll in the opposite direction to this translational movement. The cleaning rollers (200 and 300) rolling in opposite directions when in contact with the surface provides a better cleaning effect.

The present invention provides a motorized cleaning device (100) in which drive means is partly or fully enclosed inside the cleaning roller (200) where it can be protected from dust, moisture, and other foreign substances. Moreover self-contained drive means leads to a compact cleaning device and enables an easy control of the cleaning device by a user.

FIG. 4b illustrates a cross-sectional view of the first cleaning roller (200). The first cleaning roller (200) has a centrally located bore (220) extending through at least a part of the entire cleaning roller (200) so as to provide at least one opening (221, 222) at one end of the first cleaning roller (200). The drive means includes a motor (410). The motor (410) is preferably a gear motor. The motor (410) is preferably mounted inside the bore (220) of the first cleaning roller (200) and it is non-rotatable relative to the first cleaning roller (200). As the motor (410) is enclosed inside the cleaning roller (200), it can be protected from dust, moisture, and other foreign substances and it does not take up a lot of space. The first cleaning roller (200) includes a motor housing (230). The motor housing (230) is non-rotatable relative to the hollow roller tube (211) of the first cleaning roller (200). The motor (410) is fixedly disposed inside the motor housing (230) to avoid rotation. The motor housing (230) has a shaft (231) extending axially outward from the front opening (221) at the front end of the first cleaning roller (200). A bearing (234) may be placed inside the motor housing (230) to stabilize the shaft (231). A hollow bore (232) passes through the center of the shaft (231) of the motor housing (230). The hollow bore (232) may be employed in routing electrical conductor means (420) to the motor (410). In one embodiment the shaft (231) of the motor housing (230) has a protrusion (233) configured to link the electrical conductor means (420). The motor housing (230) can be rigidly fastened to the inside the cleaning roller (200), preferably to an internal constraint (240). The internal constraint (240) may define two compartments (A, B) inside the cleaning roller (200), one of which is for the motor housing (220).

The drive means also includes a drive shaft (430) for engaging and rotating the first cleaning roller (200). The drive shaft (430) extends axially from the motor (410) to the internal constraint (240) of the first cleaning roller (200). The drive shaft (430) is frictionally engaged with the internal constraint (240) of the first cleaning roller (200). Thus torque is applied by the drive shaft (430), to rotate the first cleaning roller (200). The present invention also provides a cleaning device (100) having a rechargeable battery (440) as the power supply. The rechargeable battery (440) is partly or fully enclosed inside the cleaning roller (300) where it can be protected from dust, moisture, and other foreign substances. FIG. 4b illustrates a cross-sectional view of the device embodiment of the present invention including two cleaning rollers (200, 300). The second cleaning roller (300) has a centrally located bore (320) extending through at least a part of the entire second roller (300) so as to provide at least one opening (321, 322) at one end of the second cleaning roller (300). The rechargeable battery (440) is preferably mounted inside the bore (320) of the second cleaning roller (300) and it is non-rotatable relative to the second cleaning roller (300). As the rechargeable battery (440) is enclosed inside the cleaning roller (300), it can be protected from dust, moisture, and other foreign substances and it does not take up a lot of space. The second cleaning roller (300) includes a battery housing (330). The battery housing (330) is preferably has one female component (331) and one male component (332). The female component (331) frictionally engages with the hollow roller tube (311) and rotatable relative to the hollow roller tube (311) of the second cleaning roller (300). In other words, the female component (331) rotates with the rotation of the hollow roller tube (311). The battery housing (330) has a front shaft (333) extending axially outward from the opening (321) at the front end of the second cleaning roller (300). The male component (332) and the front shaft (333) are non-rotatable relative to the hollow roller tube (311). The rechargeable battery (440) is fixedly disposed inside the male component (332) of the battery housing (330) to avoid rotation. A hollow bore (334) passes through the center of the front shaft (333) of the battery housing (330). The hollow bore (334) may be employed in routing electrical conductor means (450) from the rechargeable battery (440) to the motor (410). In one embodiment the front shaft (333) of the battery housing (330) has a protrusion (336) configured to link the electrical conductor means (450).

The first cleaning roller (200) and the second cleaning roller (300) are connected to a gear arrangement (500). The particular transmission shown in the drawing figures is an example of only one type of gearing transmission that may be employed with the motorized cleaning device of the present invention. The gear arrangement (500) includes two pairs of gears (510a, 510b, 520a, 520b), each of which includes a large gear (510a, 520a) and small gear (510b, 520b), two mounting shafts (530) and a gear carrier (540). The mounting shaft (530) of the second cleaning roller (300) may be the rear shaft (335) of the battery housing (330) extending axially outward from the opening (322) at the rear end of the second cleaning roller (300).

The gear carrier (540) supports the pair of gears (510a, 510b, 520a, 520b) and the mounting shafts (530). The gear carrier (540) is preferably disposed exteriorly of the rear end of each cleaning roller (200, 300) and fixedly secured to the rear wall (122) of the upper cover element (120). The mounting shafts (530) extend axially outward from the rear openings (222, 322) of the cleaning rollers (200, 300) to the gear carrier (550). The mounting shaft (530) of the first cleaning roller (200) is frictionally engaged with the hollow roller tube (211) of the first cleaning roller (200) at one end while it is mounted for rotation with the first large gear (510a) at the other end. Thus, torque is applied to the first large gear (510a) by the mounting shaft (530), to rotate the first large gear (510a). The first large gear (510a) meshes with a first small gear (510b) which may be a pinion gear. The mounting shaft (530) of the second cleaning roller is mounted for rotation with the second large gear (520a) at one end and it is frictionally engaged with the inside of the female component (331) of the battery housing (330) of the second cleaning roller (300) at the other end. Thus, torque is applied to the mounting shaft (530) by the second large gear (520a), to rotate the second cleaning roller (300). The second large gear (520a) meshes with a second small gear (520b) which may be a pinion gear and the second small gear (520b) meshes with the first small gear (510b). The gear carrier (550) supports the ends of the mounting shafts (530) in respective gear journals (531). With the particular drive transmission shown in the drawing figures, rotation of the drive shaft (430) rotates the first cleaning roller (200) and the mounting shaft (530) of the first cleaning roller (200). The mounting shaft (530) drives the first large gear (510a). Rotation of the first large gear (510a) is also transmitted to rotation of the second large gear (520a) in opposite direction through the first and second small gears (510b and 520b). Rotation of the second large gear (520a) causes the rotation of the mounting shaft (530) and the second cleaning roller (300). The gear arrangement also includes gear bearings (550) in which respective gear is disposed

As illustrated in FIG. 5a and 5b in a preferred embodiment, the hollow roller tube (211, 311) of at least one cleaning roller (200, 300) includes a hollow inner tube (212,

312) and a hollow outer tube (213, 313) mounted on the outer surface of the hollow inner tube (212, 312). The hollow roller tube (211, 311) is preferably made of flexible plastic material. In this specific embodiment the hollow inner tube (212, 312) and the hollow outer tube (312, 313) are configured in that the hollow inner tube (212, 312) receives the hollow outer tube (213, 313) in a snap-on fit. This configuration also provides that the hollow inner tube (212, 312) and the the hollow outer tube (213,

313) are easily separable from each other without breaking one of its components. This also leads an easy placement of the cleaning cloth (210, 310) onto respective hollow outer tube (213, 313) and removal of it for changing with a new one when needed.

According to many preferred embodiments, the cleaning cloth (210, 310) substantially or entirely covers the outer face of the hollow roller tube (211, 311) such that the cleaning device (100) can clean the screen surface in effective manner and regardless of the direction of rolling. Thus the cleaning cloth (210, 310) is preferably in the form of a hollow tube mounted on the outer surface of the hollow roller tube (210, 310).

The cleaning device (100) may comprise a shaft carrier (600) enabling the at least one cleaning roller (200, 300) to be fixedly secured to the front wall (121 ) of the upper cover element (120). The shaft carrier (600) supports the shaft (231) of the motor housing (230) and the front shaft (333) of the battery housing (330) at the front end of the cleaning rollers (200, 300). The shaft carrier (600) has means to releasably mount the shaft (231) of the motor housing (230) and the front shaft (333) of the battery housing (330). The means includes compartments (610) in which the ends of the shafts (231, 333) are residing. For example, the protrusion (233) of the shaft (231) of the motor housing (230) and the protrusion of the front shaft (333) of the battery housing (330) are placed in the compartments (610). The means also include a clips mechanism in order to secure and/or release the shafts (231 , 333) and so the cleaning rollers (200, 300). The clips mechanism includes a bar (620) in order to easily release the shafts (231 , 333) from the shaft carrier (600) and the upper cover element (120) when pressed by a user for releasing the at least one cleaning roller (200, 300). FIG.5 illustrates the release of the cleaning rollers (200, 300).

There is also a conductor part (460) to form a link between the electrical conductor means (450) from the battery (440) and the electrical conductor means (420) to the motor (410). The shaft carrier (600) also supports the conductor part (460). The conductor part (460) may function as a bridge between the rechargeable battery (440) inside the second cleaning roller (300) and the motor inside the first cleaning roller (200). The conductor part (460) has coupling means (461) enabling them to couple to the shafts (231 , 333). These means may be in the form of hooks inserted into the protrusions (233, 336) of the shafts (231, 333). The shaft carrier (600) is connected to a circuit card holder (630) positioned above the at least one cleaning roller (200, 300).

The present invention also provides a lower cover element (700) to cover an open part of the cleaning device (100). The lower cover element (700) is configured to keep the at least one cleaning roller (200, 300) clean and free of debris during the cleaning device (100) is not in a cleaning operation i.e, when the cleaning device (100) is closed by the lower cover element (700). FIG.6a and 6b illustrate the cleaning device closed by the lower cover element, i.e. in a closed position. The lower cover element (700) is also configured to clean the at least one cleaning roller (200, 300) at the same time. The lower cover element (700) has at least one roller housing (710) for the at least one cleaning roller (200, 300). The roller housing (710) is generally configured to accommodate a cleaning roller (200, 300). The roller housing (710) is preferably in the form of a roller cradle to accommodate a part of the cleaning roller (200, 300). The cleaning device (100) and the lower cover element (700) is configured that when the cleaning device (100) is covered/closed by the lower cover element (700) the at least one cleaning roller (200, 300) can still rotate inside the roller housing (710). There is a gap between the exterior of the cleaning roller (200, 300) and the inside wall of the roller housing (710) to allow the cleaning roller (200, 300) to freely rotate within the roller housing (710). The roller housing (710) has brushes (720) to clean the at least one cleaning roller (200, 300) when the cleaning device (100) is covered/closed by the lower cover element (700). The brushes (720) are preferably in a line form extending longitudinally and of substantially circular shape on the surface of the roller housing (710). In one preferred embodiment the there are two line of brushes (720) in the lower cover element (700). The brushes (720) engages the cleaning cloth (210, 310) of the cleaning roller (200, 300) when the lower cover element (700) is in closed position and they can clean the cleaning cloth (210, 310) by rotation of the cleaning roller (200, 300) inside the roller housing (710) when the cleaning device (100) is operated at the same time. The brushes (720) can be, for example, made of nylon, plastic, or an elastomer.

The lower cover element (700) includes a base portion (730) to rest the cleaning device on a flat surface. Thus the base portion (730) has flat bottom surface (731) to rest the cleaning device. The base portion generally has a small dimension in compliance with the upper cover element (120) which may be defined by one or more height and width dimensions when viewing its front face or back (or rear) face, and by one or more depth dimensions when viewed on the left or right sides. The lower cover element (700) may potentially be a variety of shapes.

The at least one cleaning device (100) is first placed into the lower cover element (700). In this position, once the cleaning rollers (200, 300) are in place, they can freely rotate during operation and clean the cleaning rollers (200, 300). When it is time to use the cleaning device (100) is removed away from the lower cover element (700) so as to expose the cleaning rollers (200, 300). The cleaning device (100) is rolled on a surface to clean it. When the user is done cleaning the screen, the user puts the cleaning device (100) back into the lower cover element (700) and clean the cleaning rollers (200, 300) again. The dirt and smudge collected inside the lower cover element (700) can be thrown away. The cleaning apparatus of the present invention can be stored in a user’s pocket or bag or glove box of a motor vehicle for its next use.

In order to clean the cleaning roller (200, 300) of the cleaning device (100), the cleaning cloth (210, 310) is removed from the cleaning roller (200, 300) . This can easily be made with taking the snap-fit hollow outer tube (213, 313) together with the cleaning cloth (210, 310) after releasing the cleaning roller (200, 300) from the upper cover element (120) as illustrated in FIG. 7b. The cleaning cloth (210, 310) can be changed with a new one. In an alternative embodiment the cleaning cloth (210, 310) is reusable and can be again inserted onto the cleaning roller (200, 300) after being washed with water.

While the present invention has been disclosed with reference to certain embodiments, it will be apparent that modifications and variations are possible without departing from the spirit and scope of the invention as defined in the appended claims. Furthermore, it should be appreciated that all examples in the present disclosure, while illustrating embodiments of the invention, are provided as non-limiting examples and are, therefore, not to be taken as limiting the various aspects so illustrated. The present invention is intended to have the full scope defined by the language of the following claims, and equivalents thereof. Accordingly, the drawings and detailed description are to be regarded as illustrative and not as restrictive.