Mopping extension for a robotic vacuum

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of provisional patent application Ser. No. 62/092,802, filed Dec. 16, 2014 by the first named inventor and provisional patent application Ser. No. 62,155,733, filed May 1, 2015 by the first named inventor.

FIELD OF INVENTION

This invention relates to automated robotic devices. More particularly, this invention relates to robotic floor cleaning devices.

BACKGROUND OF INVENTION

The following is a tabulation of some prior art that presently appears relevant:

U.S. Patent Documents

More efficient methods for cleaning are continuously sought after to meet consumer demands. This can be seen in robotic floor cleaning devices through software changes, such as improved navigation systems and hardware changes including stronger and more energy efficient motors, improved brush designs, improved debris storage containers, etc. Robotic floor cleaning devices also generally specialize in different functions, such as mopping, vacuuming, or polishing.

In prior art, separate robotic devices for vacuuming and mopping floors were introduced individually. Each of these apparatuses has only one function (mopping or vacuuming), which means that in order to thoroughly clean a work surface, a user would need to have a combination of devices and run them one after the other. This practice has a relatively high cost of ownership, high level of maintenance required, and long time to completion of a given workspace. A need exists for a method to provide vacuuming and mopping functions in a single robotic device.

SUMMARY OF INVENTION

It is a goal of the present invention to provide both mopping functionality and vacuuming functionality in a single robotic floor cleaning device.

It is a goal of the present invention to provide a comprehensive autonomous floor-cleaning method that is less expensive than currently available robotic systems.

It is a goal of the present invention to increase the cleaning effectiveness of a vacuuming robot.

It is a goal of the present invention to eliminate the need for multiple floor-cleaning robots to thoroughly clean an area.

It is a goal of the present invention to minimize the amount user maintenance required in using robotic systems to clean floors.

It is a goal of the present invention to provide a solution that minimizes the amount of time required to complete a comprehensive floor-cleaning job.

The present invention achieves the aforementioned objectives through a removable mopping extension that can be attached to an automated robotic vacuum to expand the vacuum's functionalities. With the extension, the device mops surfaces concurrently while vacuuming, increasing cleaning efficiency.

A mopping extension may be installed in a dedicated compartment in the chassis of an automated robotic vacuum. A cloth positioned on the mopping extension is dragged along the work surface as the automated robotic vacuum drives through the area. In some embodiments, nozzles direct fluid from a cleaning fluid reservoir to the mopping cloth. The dampened mopping cloth may further improve cleaning efficiency. In some embodiments, the mopping extension further comprises a means for moving back and forth in a horizontal plane parallel to the work surface during operation. In some embodiments, the mopping extension further comprises a means for moving up and down in a vertical plane perpendicular to the work surface to engage or disengage the mopping extension.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 illustrates an overhead view of the underside of a mopping extension embodying features of the present invention.

FIG. 2 illustrates an overhead view of a mopping extension showing the internal components embodying features of the present invention.

FIG. 3 illustrates an overhead view of a mopping extension with ultrasonic oscillators embodying features of the present invention.

FIG. 4A illustrates an overhead view of a mopping extension with eccentric rotating mass vibration motors to provide vibrations to the mopping extension embodying features of the present invention.

FIG. 4B illustrates a perspective view of an eccentric rotating mass vibration motor embodying features of the present invention.

FIG. 5 illustrates the insertion of a mopping extension into a compartment in the chassis of a robotic vacuum embodying features of the present invention.

FIG. 6 illustrates a side view of a robotic vacuum with a motor to move a mopping extension to move back and forth during operation embodying features of the present invention.

FIG. 7A illustrates a side view of a robotic vacuum with a mechanism for engaging and disengaging a mopping extension in an engaged position embodying features of the present invention.

FIG. 7B illustrates a side view of a robotic vacuum with a mechanism for engaging and disengaging a mopping extension in a disengaged position embodying features of the present invention.

FIG. 8A illustrates a side view of a robotic vacuum with an alternative mechanism for engaging and disengaging a mopping extension in a disengaged position embodying features of the present invention.

FIG. 8B illustrates a side view of a robotic vacuum with an alternative mechanism for engaging and disengaging a mopping extension in an engaged position embodying features of the present invention.

FIG. 9A illustrates a side view of a robotic vacuum with a mopping extension attached in a disengaged position embodying features of the present invention.

FIG. 9B illustrates a side view of a robotic vacuum with a mopping extension attached in an engaged position embodying features of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The present invention proposes a mopping extension unit for an automated robotic vacuum to enable the device to simultaneously vacuum and mop work surfaces. The provisioned mopping extension would improve the cleaning effectiveness of a robotic vacuum and eliminates the need for a dedicated mopping robot to run after a dedicated vacuuming robot.

A detachable mopping extension that may be installed inside a dedicated compartment with the chassis of a robotic floor cleaning device is provisioned. Referring to FIG. 1, an overhead view of the underside of a detachable mopping extension 100 is illustrated. The mopping extension may be attached to the chassis of a robotic floor cleaning device (not shown). The mopping extension is comprised of a frame 101 that supports a removable mopping cloth 102 and a latch 103 to secure and release the mopping extension to and from the robotic floor cleaning device.

Referring to FIG. 2, the internal components of the mopping extension 200 are illustrated. The frame 201 supports the mop components. As mentioned previously, a latch 203 secures the mopping extension to the chassis of the robotic device and may be released to detach the mopping extension. In some embodiments, the mopping extension further comprises a refillable fluid reservoir 204 that stores cleaning fluid to be dispersed by nozzles 205 onto the mopping cloth 202. In some embodiments, the nozzles continuously deliver a constant amount of cleaning fluid to the mopping cloth. In some embodiments, the nozzles periodically deliver predetermined quantities of cleaning fluid to the cloth.

Referring to FIG. 3, in some embodiments, the mopping extension 300 further comprises a set of ultrasonic oscillators 306 that vaporize fluid from the reservoir 304 before it is delivered through the nozzles 305 to the mopping cloth 302. Metal electrodes 307 provide power from a main battery (not shown) of the robotic device to the ultrasonic oscillators. In some embodiments, the ultrasonic oscillators vaporize fluid continuously at a low rate to continuously deliver vapor to the mopping cloth. In some embodiments, the ultrasonic oscillators turn on at predetermined intervals to deliver vapor periodically to the mopping cloth.

In some embodiments, the mopping extension further comprises a means to vibrate the mopping extension during operation. Referring to FIG. 4A, a mopping extension 400 with eccentric rotating mass vibration motors 408 is illustrated. Referring to FIG. 4B, a close up perspective view of an eccentric rotating mass vibration motor 408 is illustrated. Eccentric rotating mass vibration motors rely on the rotation of an unbalanced counterweight 409 to provide vibrations to the mopping extension.

Referring to FIG. 5, a corresponding robotic vacuum to which the mopping extension may be attached is illustrated. The mopping extension 500 fits into a compartment 510 on the underside of the robotic vacuum 511 such that as the robotic vacuum drives, the mopping extension may be caused to make contact with the work surface.

In some embodiments, the mopping extension further comprises a means to move the mopping extension back and forth in a horizontal plane parallel to the work surface during operation. Referring to FIG. 6, a side elevation view of a robotic vacuum with a mechanism for moving the mopping extension back and forth is illustrated. An electric motor 612 positioned inside the chassis of the robotic vacuum 611 transfers movements to the mopping extension 600 through a rod 613 to tabs 614 on the mopping extension.

In some embodiments, the mopping extension further comprises a means to engage and disengage the mopping extension during operation by moving the mopping extension up and down in a vertical plane perpendicular to the work surface. In some embodiments, engagement and disengagement may be manually controlled by a user. In some embodiments, engagement and disengagement may be controlled automatically based on sensory input. Referring to FIG. 7A, a side view of a robotic vacuum 711 with a means for engaging and disengaging the mopping extension 700 is illustrated. (The mopping extension is shown not attached to the robotic vacuum in this example to more clearly show details; another example in which the mopping extension is attached will be provided later.) An electric servomotor 715 positioned within the chassis of the robotic vacuum pushes forward and pulls back wedges 716 that raise and lower springs 717 to which the mopping extension 700 may be attached. When the wedges are pulled back, as shown in FIG. 7A, the mopping extension, when attached, will be engaged. Referring to FIG. 7B, when the wedges 716 are pushed forward in a direction 718 by the electric servomotor 715, the springs 717 are raised and the mopping extension 700 is disengaged.

Referring to FIG. 8A and FIG. 8B, an alternate method for engaging and disengaging the mopping extension is illustrated. An oval wheel 819 positioned in the chassis of the robotic vacuum 811 is turned by an electric motor 820, which causes the wheel to push down a plate 821. When the wheel is not pushing the plate down, springs 817 are not pushed down and the mopping extension 800 is not engaged. Referring to FIG. 8B, when the wheel 819 is pushing down the plate 821, the springs 817 are pushed down which lowers the mopping extension 800, engaging it.

Referring to FIGS. 9A and 9B, a robotic vacuum 911 with a mopping extension 900 attached is illustrated. In FIG. 9A, the springs 917 are not lowered and the mopping extension 900 is in a disengaged position, where the mopping extension cannot make contact with the work surface 922. Referring to FIG. 9B, the springs 917 are lowered and the mopping extension 900 is in an engaged position, such that the mopping extension makes contact with the work surface 922.