ELECTRIC WINDOW CLEANING DEVICE

Abstract

An electric window cleaning device includes an operating portion and a wiping portion which are attracted to both sides of a glass of a window by magnets, and are free to move along the glass by virtue of balls. The wiping portion includes a power mechanism and a power supply device. The power mechanism includes an output shaft, a rotary disc and a duster removably fixed to the rotary disc. The power device includes a switch and a battery which are electrically connected to the power mechanism. When the power mechanism is turned on, the output shaft rotates the rotary disc and the duster to clean the outer surface of the glass, as an user moves the operating portion which is attracted to the inner surface of the glass, the wiping portion will also move along the outer surface of the glass to perform cleaning operation.

Claims

1. An electric window cleaning device, comprising: an operating portion including a pedestal, a plurality of magnets and a plurality of balls, wherein the pedestal includes a handle and a bottom surface formed opposite to the handle, the magnets are disposed on the pedestal, the balls partially protrude from the bottom surface of the pedestal and are free to roll along the pedestal; and a wiping portion including a base, a plurality of magnets, a plurality of balls and a power mechanism, wherein the base includes a bottom surface, the magnets are disposed in the base, the balls partially protrude from the bottom surface of the base and are free to roll along the base, the power mechanism is supported on the base, and includes an output shaft for outputting rotational kinetic energy and a rotary disc rotated by the output shaft, a duster is fixed to an outer surface of the rotary disc; wherein the operating portion and the wiping portion are magnetically attracted to each other across a glass of a window by magnetic forces of the magnets and are attracted to an inner surface and an outer surface of the glass, respectively, when the power mechanism is turned on, the output shaft rotates the rotary disc and the duster to clean the outer surface of the glass, as an user moves the operating portion which is attracted to the inner surface of the glass, the wiping portion will move simultaneously along the outer surface of the glass to perform cleaning operation.

2. The electric window cleaning device as claimed in claim 1, wherein the operating portion further includes a connecting member which includes a spherical body and a connecting portion, the pedestal includes a spherical cavity and a cover removably fixed to the pedestal, the spherical body is disposed in the spherical cavity and rollably locked in spherical cavity by the cover, and the connecting portion is formed on an outer surface of the spherical body, inserted through the cover, and provided for connecting a rod.

3. The electric window cleaning device as claimed in claim 1, wherein each of the pedestal and the base is further provided with a plurality of receiving holes with a large upper diameter and a small lower diameter, the receiving holes are provided for accommodating the balls, each of the balls is rollably retained in a corresponding one of the receiving holes by a plug screwed in a large-diameter end of the corresponding one of the receiving holes, each of the plugs is provided with a semispherical cavity in one end thereof facing a corresponding one of the balls, and a plurality of small steel balls is disposed between the semispherical cavity and the corresponding one of the balls.

4. The electric window cleaning device as claimed in claim 1, wherein the wiping portion further comprises a power supply device which includes a switch, a battery and a power indicator light which form a loop.

5. The electric window cleaning device as claimed in claim 4, wherein the power supply device further comprises a socket which constitutes a part of the loop, the socket is provided for connecting an AC/DC convertor which is used to recharge the battery or supply power to the power mechanism and recharge the battery.

6. The electric window cleaning device as claimed in claim 1, wherein the power mechanism includes a motor for producing a rotational force, and a reduction gear box connected to a power outputting end of the motor to take the power of the motor, and the reduction gear box reduces a rotation speed and increases a torque of the motor, and then outputs via the output shaft.

7. The electric window cleaning device as claimed in claim 1, wherein the rotary disc is fixed to a rotary-disc shaft which is rotatably supported on a bearing fixed to the base, and the output shaft is inserted in the rotary-disc shaft to transmit rotational motion to the rotary disc via the rotary-disc shaft.

8. The electric window cleaning device as claimed in claim 1, wherein two hook and loop fasteners which are capable of being fastened to each other are attached to the outer surface of the rotary disc and a back surface of the duster, respectively, so that the duster is removably attached to the rotary disc.

9. An electric window cleaning device, comprising two wiping portions, each of the wiping portions including a base, a plurality of magnets, a plurality of balls and a power mechanism, wherein the base includes a bottom surface, the magnets are disposed in the base, the balls partially protrude from the bottom surface of the base and are free to roll along the base, the power mechanism is supported on the base, and includes an output shaft for outputting rotational kinetic energy and a rotary disc rotated by the output shaft, a duster is fixed to an outer surface of the rotary disc; wherein the two wiping portions are magnetically attracted to each other across a glass of a window by the magnets and are attracted to an inner surface and an outer surface of the glass, respectively, when the power mechanism is turned on, the output shaft rotates the rotary disc and the dusters to clean the inner and outer surfaces of the glass, as an user moves the wiping portion which is attracted to the inner surface of the glass, the wiping portion attached to the outer surface of the glass will move simultaneously along the outer surface to perform cleaning operation.

10. The electric window cleaning device as claimed in claim 9, wherein the base is further provided with a plurality of receiving holes with a large upper diameter and a small lower diameter, the receiving holes are provided for accommodating the balls, each of the balls is rollably retained in a corresponding one of the receiving holes by a plug screwed in a large-diameter end of the corresponding one of the receiving holes, each of the plugs is provided with a semispherical cavity in one end thereof facing a corresponding one of the balls, and a plurality of small steel balls is disposed between the semispherical cavity and the corresponding one of the balls.

11. The electric window cleaning device as claimed in claim 9, wherein the wiping portion further comprises a power supply device which includes a switch, a battery and a power indicator light which form a loop.

12. The electric window cleaning device as claimed in claim 11, wherein the power supply device further comprises a socket which constitutes a part of the loop, the socket is provided for connecting an AC/DC convertor which is used to recharge the battery or supply power to the power mechanism and recharge the battery.

13. The electric window cleaning device as claimed in claim 9, wherein the power mechanism includes a motor for producing a rotational force, and a reduction gear box connected to a power outputting end of the motor to take the power of the motor, and the reduction gear box reduces a rotation speed and increases a torque of the motor, and then outputs via the output shaft.

14. The electric window cleaning device as claimed in claim 9, wherein the rotary disc is fixed to a rotary-disc shaft which is rotatably supported on a bearing fixed to the base, and the output shaft is inserted in the rotary-disc shaft to transmit rotational motion to the rotary disc via the rotary-disc shaft.

15. The electric window cleaning device as claimed in claim 9, wherein two hook and loop fasteners which are capable of being fastened to each other are attached to the outer surface of the rotary disc and a back surface of the duster, respectively, so that the duster is removably attached to the rotary disc.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a cross sectional view of the invention showing that the electric window cleaning device is attached to the inner and outer surfaces of the glass of the window; and

[0015] FIG. 2 is a cross sectional of another embodiment of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.

[0017] Referring to FIG. 1, an electric window cleaning device 10 in accordance with the present invention comprises an operating portion 20 with a pedestal 21. A handle 22 is formed on the top of the pedestal 21 to facilitate the user to hold the operating portion 20 with one hand. The operating portion 20 further includes a plurality of magnets 23 which are separately embedded at different positions in the pedestal 21, and the purpose of the magnets 23 will be explained later. The pedestal 21 is further provided with a plurality of receiving holes 24 with a large upper diameter and a small lower diameter. Each of the receiving holes 24 is provided for accommodating a ball 25 which is rollably retained therein by a plug 26 screwed in a large-diameter end of a corresponding one of the receiving holes 24, in such a manner that the balls 25 partially protrude from a bottom surface 29 of the pedestal 21 to come into contact with an inner surface 71 of the glass 70 of the window in a point-to-point contact manner, so that the friction force between the operating portion 20 and the inner surface 71 is reduced so as to facilitate the operating portion 20 to slide on the inner surface 71. Besides, each of the plugs 26 is provided with a semispherical cavity 27 in one end thereof facing a corresponding one of the balls 25, and a plurality of small steel balls 28 is disposed between the cavity 27 and the corresponding one of the balls 25. Thus, each of the balls 25 can roll in any direction with the aid of the small steel balls 28 which have the effect of reducing friction, so that the operating portion 20 can move freely along the inner surface 71.

[0018] Another important part of this invention is a wiping portion 40 which is magnetically attracted to the operating portion 20 across the glass 70. As shown in FIG. 1, the wiping portion 40 includes a base 41 which is the same as the operating portion 20 and also provided with a plurality of magnets 42 and balls 43 at the corresponding positions, so that the operating portion 20 and the wiping portion 40 can be magnetically attracted to each other across the glass 70 by the magnets 23, 42, and are attracted to the inner surface 71 and an outer surface 72 of the glass 70, respectively. Meanwhile, the balls 25, 43 which protrude respectively from the bottom surface 29 of the pedestal 21 and a bottom surface 44 of the base 41 can roll freely along the inner surface 71 and the outer surface 72 of the glass 70, respectively. In the drawings, the reference number 45 represents the receiving holes, 46 represents the plug, 47 represents the cavities, 48 represents the small steel balls, which are the same as the corresponding elements of the operating portion 20.

[0019] The wiping portion 40 further includes a power mechanism 49 and a power supply device 50. The power mechanism 49 includes a motor 51 and a reduction gear box 52. The motor 51 produces a rotational force, and the reduction gear box 52 is connected to the power outputting end of the motor 51 to take the rotational force of the motor 51. The reduction gear box 52 reduces the rotation speed and increases the torque of the motor 51, and then outputs a rotational kinetic energy via an output shaft 53. The output shaft 53 is inserted into a rotary-disc shaft 62 to transmit the rotational kinetic energy to a rotary disc 54 connected to the latter. The rotary-disc shaft 62 is rotatably supported on a bearing 57 fixed to the base 41. A hook and loop fastener (Velcro) 55 is attached to an outer surface of the rotary disc 54, so that a duster 56 whose back surface is also provided with a hook and loop fastener (Velcro, not shown) can be attached to the rotary disc 54 to clean the glass 70 of the window, and the duster 56 can be removed for cleaning or replacement when it becomes dirty or broken after use overtime.

[0020] The power supply device 50 includes a switch 58, a socket 59 and a battery 60 which are disposed on the base 41 and electrically connected to the motor 51 to form a loop which will be closed when the switch 58 is On and will be opened when the switch 58 is Off, so as to stop or start the motor 51. The socket 59 is provided for connecting an AC/DC convertor (not shown), so that the battery 60 can be recharged by the AC/DC convertor to supplement the current consumed by the battery 60. Of course, the loop can also be slightly modified to use the convertor to supply current to the motor 51 and recharge the battery 60. In a preferred embodiment, the power supply device 50 further includes a power indicator light 61 which constitutes a part of the loop, and the power indicator light 61 is turned on or off when the switch 58 is On or Off, so as to provide a visual signal to let the user know whether the electric window cleaning device 10 is turned on or not.

[0021] As shown in FIG. 1, when the electric window cleaning device 10 is in use, the user should wet the duster 56 and spray cleaner on it, then the operating portion 20 and the wiping portion 40 are magnetically attracted to each other across the glass 70 by the magnets 23, 42, and are attracted to the inner surface 71 and an outer surface 72 of the glass 70, respectively, and then the switch 58 is turned on. When the switch 58 is On, the battery 60 is electrically connected to the circuit of the motor 51 to start the motor 51. The reduction gear box 52 reduces the rotation speed and increases the torque of the motor 51, and then the output shaft 53 drives the rotary disc 54 to rotate via the rotary-disc shaft 62, and as a result, the duster 56 fixed on the rotary disc 54 rotates simultaneously to clean the outer surface 72 of the glass. As the user manually moves the operating portion 20 which is attracted to the inner surface 71 of the glass 70 of the window, the wiping portion 40 attached to the outer surface 72 will also move simultaneously while performing cleaning operation until the entire outer surface 72 is completely cleaned.

[0022] Since the duster 56 is driven to rotate by the power mechanism 49, a friction at middle and low speeds will be produced with respect to the outer surface 72 to achieve a quick and efficient cleaning effect. Besides, the operating portion 20 and the wiping portion 40 can maintain a point-to-point contact with the inner and outer surfaces 71, 72 of the glass 70 of the window via the balls 25, 43 which are free to roll in any directions, which substantially reduces the friction resistance of the operating portion 20 and the wiping portion 40 with respect to the glass 70 of the window, so that the electric window cleaning device 10 can easily move on the surfaces of the glass 70 of the window and freely turn, so as to improve work efficiency.

[0023] As shown in FIG. 1, the operating portion 20 further includes a connecting member 31 which includes a spherical body 32 and a connecting portion 33. The spherical body 32 is disposed in a spherical cavity 30 of the handle 22, and is retained in a hollow cover 34 of the pedestal 21 and rollably locked in spherical cavity 30 by a retaining member, such as a screw (not shown). The connecting portion 33 is formed on an outer surface of the spherical body 32, inserted through the cover 34, and provided for connecting a rod 35, so that the rod 35 pivoted to the connecting portion 33 by a pivot member 36 can be folded with respect to the connecting member 31. Meanwhile, the connecting member 31 is freely rollable in the spherical cavity 30, so that the rod 35 can be used to move the operating portion 20, and the wiping portion 40 can also be moved in a simultaneous manner, which is convenient for carrying out the cleaning operation of the outer surface 72 of the glass 70 of the window without the help of a chair or a ladder. The rod 35 can be made of a telescopic rod whose length can be varied, or can be made of more than two rods which are connected by joints, so that the user can adjust the length as desired. The connecting member 31 is assembled to the pedestal 21 only when it is necessary to use the rod 35, and can be removed at ordinary times.

[0024] The invention is not limited to the abovementioned embodiments and may otherwise be of different forms. For example, as shown in FIG. 2, it can also in the form of the electric window cleaning device 10a which is provided with two wiping portions 40 which are attracted to each other across the glass 70 to simultaneously clean the inner surface 71 and the outer surface 72 of the glass 70 of the window.

[0025] While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.