Sturdy print-in-place draw latch

prusaprinters

<p>This is a small but sturdy latch that can be printed in place. It has a flat surface for your printing pleasure. No supports, no rafts, no brim. Just the way we like it.</p> <p>This kind of latch is typically called tension latch, toggle latch, toggle clamp, pull latch or others. However, I like the name draw latch most for this kind of latch.</p> <p>Tolerances are between 0,2 and 0,3 mm. I printed it with a lower middle-class delta printer (FLSUN QQ-S) with a resolution of 0,15. The key to a printing success is slight under-extrusion, especially on the first layer. The snapshot of the printed sample (straight from the printer, no post-processing) shows that I overdid the underextrusion a bit.</p> <p>In terms of sturdiness: print thick shells (I did 1,2mm), infill is only of secondary importance</p> <p>This latch can be attached with up to four screws, at maximum M3. Glueing is also conceivable.</p> <p>A nice addition to a standard latch is an integrated geometry at the moving parts that fixes the toggle and restricts movement in undesirable directions (see little nibs in dimensions drawing). I believe this is best possible with additive manufacturing.</p> <p>Benefits of this model:</p> <ul> <li>print-in-place (for the glory of 3D printing)</li> <li>sturdy (... for a 3D printed latch made of plastics)</li> <li>compact dimensions</li> <li>integrated guiding geometry</li> <li>somewhat visually pleasing</li> </ul> <p>Drawbacks of this model:</p> <ul> <li>not sturdy (... compared to non-printed, non-plastic latches)</li> <li>subpar printers might have issues with the tolerances</li> </ul> <p>I have not tested this latch much. However, both of my use case were satisfactory.</p> <p>Designed with FreeCAD, quickly rendered with CADRays.</p> <p>Conceivably Engineering - Little competence, big smiles.</p> <h3>Print Settings</h3> <p><strong>Printer:</strong></p> <p>FLSUN QQ-S</p> <p class="detail-setting rafts"><strong>Rafts: </strong> <div><p>No</p></div> <p><strong>Supports:</strong></p> <p>No</p> <p class="detail-setting resolution"><strong>Resolution: </strong> <div><p>0.15</p></div> <p><strong>Infill:</strong></p> <p>Depends on your application.</p> <p><strong>Filament:</strong></p> Janbex Grey, Basicfil black PLA </p></p> Category: Parts