I like to get back rubs and have my back scratched.  Unfortunately, my wife stubbornly refuses to rub or scratch my back every night until I fall to sleep.  So I thought it would be nice if someone invented a robotic arm that could be attached to the headboard of the bed and would scratch my back for me.

The robotic back scratcher should have a rotating cuff so that it can scratch the user’s back while the user is lying on their stomach or on their side (and can scratch to the left or to the right depending on which side of the bed you’re on).

The robotic “hand” should be equipped with pressure sensors so that it automatically maintains the right position; if the user moves, the “hand” should follow, maintaining contact with the user’s back.

The “fingers” should have retractable “nails,” and the amount of pressure applied should be adjustable, so the user can choose between a light back scratch and a deep tissue massage.  (For safety, the maximum pressure when the “fingernails” are extended will be less than when they are retracted.)  Another option to consider is the ability to use a flexible “palm” instead of individual fingers.

The direction of motion should be adjustable, so the user can choose between a path that is primarily circular, side-to-side, up-and-down, or fully randomized.  The range should also be adjustable, to accommodate user preference and backs of different sizes.

The pressure and path of motion should be somewhat randomized, to make the experience more “natural” and keep it from being too repetitive.  The degree of randomness should be independently adjustable for each setting, based on user preference.

Finally, the robot should be equipped with Bluetooth so that the operation and settings can be controlled via a smartphone app.  The app should provide on-the-fly adjustments, but also allow user preferences to be saved and recalled to support different users and/or different moods.

Anyone want to build this for me?