Overview of the design
The box measures 80mm by 92mm and can fit in someone’s hand. When the input crank is turned on the back of the box, the top bar waves back and forth at the user. Decided to design the mechanism so that the input can be rotated fully 360° for ease of use by the user and in case a motor should get attached to the mechanism later.
Measurements
Input: 30mm
Coupler/Slotted: 175mm
Grounded Middle: 90mm
Nuts and Bolts: M4 (various lengths)
Slot Length: 70mm
IMAGES OF BLACK 3D PRINTED DESIGN