Files for the exercise dumbbell head prosthetic

Materials

<h2>Introduction</h2>Ayúdame3D is developing a new type of prosthesis with interchangeable heads that allow for engaging in sports activities:→ Dumbbell exercises Holding a dumbbell requires:<ol><li>A sturdy head that can support weight (between 1 and 5kg).</li><li>A head that can open and close quickly to switch between different dumbbells.</li><li>ESSENTIAL: A head that won't open or release the dumbbell while the exercise is being performed: → This could lead to serious injuries.</li></ol>Forearm of a sports prosthesis developed by Ayúdame3D:<img src="https://dm81t6ktzqzp3.cloudfront.net/files/3c2e1f2175d1429b90e3a1f1cb9fbe0d/iYlx9D111SeY8l0hopPxBw" /> <h2>Current status</h2>Ayúdame3D is using a metal clamp that attaches to the forearm using an M10 screw and allows gripping the dumbbell handle.<img src="https://dm81t6ktzqzp3.cloudfront.net/files/453f17bc66994a37a5b4b543981e9d55/irpA15ocl6KdBBzrHfiV8Q" /> Inconveniences<ul><li>It cannot be manufactured using our 3D printers.</li><li>The system for opening and closing the clamp is secure but slow. → It disrupts the exercise rhythm when switching from one dumbbell to another.</li></ul>To open and close the head, you have to screw and unscrew the butterfly nut along the entire M8 screw (red arrow):<img src="https://dm81t6ktzqzp3.cloudfront.net/files/e96f65c687cd4e37baa4941d723e2123/1apBKQ2GBaGC0NUzQvftFA" /> <h2>What do we need?</h2><ul><li>A design for a robust head that can withstand forces of up to 8-10kg.</li><li>Secure but quick-release closure that can be manipulated with one hand.</li><li>A design that can be manufactured using FDM 3D printers.</li><li>A head that can be attached to a prosthesis but can be removed for interchangeability (e.g., for performing a different type of exercise).</li></ul>
 
<h2>Winners</h2>The winners of this non-for-profit challenge will earn 2,000 karma points and one custom-made trophy by us: <img src="https://dm81t6ktzqzp3.cloudfront.net/files/a3b59854d6e446a1870606896ca2869e/StSqGHpMHHvsjap48fM1DQ" />