Prompt: create a mechanical sketch of the design of the working principle belowThe handheld sewing machine, designed in a stapler-like configuration, employs a single-thread mechanism. Upon application to fabric layers and activation of the handle, a needle initiates penetration, forming a loop. Subsequently, a miniature U-shaped fastener, akin to a staple, is deployed to secure the loop, thereby creating a rudimentary stitch. This design facilitates rapid and provisional repairs, eliminating the necessity for a conventional sewing machine.