EDC-Friendly Lightweight Utility Knife

This is a high-precision model designed to achieve controlled blade deployment resistance within minimal spatial constraints, while generating crisp mechanical feedback (audible "click" engagement). No supports requiredTool-free, glue-free, hardware-free assembly (1-minute completion) Design Concept:As part of a series of utility knife designs, this version prioritizes:Ultralight portability (pocket-ready dimensions) Slider button depresses resistance rack for smooth blade extensionRack spring force provides secure retention Update: New Optional Version - Reinforced Edition(Detailed changelog at end) Controlled blade resistance via micro-rack mechanism (prevents accidental deployment) Secondary cutting function (cord-cutting notch on blade spine in stored position,⌀4mm) Designed for standard blade dimensions (specific measurements shown in diagram), with allowable tolerances. Print Tolerance Specifications: 0.12 The internal elastic structure pushes the small gear into contact