Compact Push-Lock Mechanism Design

I need a tiny locking system that clicks into place when pushed and pops free when pressed again. The whole idea is to keep it as simple as possible—ideally a single piece or just a couple of parts—so a snap-fit or flexure-based design is the natural fit.

Key points I must hit:
• Made from TPU, mould-ready and dimensioned for small-scale plastic production.
• No coil springs, pins, or multi-part latches; the geometry itself should do the work.
• Clear tactile feedback on both lock-in and release.
• Durable enough for regular, everyday use without losing its bite.
• Compact footprint so it can nest inside tight assemblies.

If you can translate those needs into a straightforward CAD model that I can send straight to the printer or mould shop—and back it up with a short explanation of how the flexure or snap works—then we’re set.

Deliverables:
1. 3D CAD files (STEP or similar) of the mechanism.
2. A brief drawing or note set showing dimensions, tolerances, and material call-outs.
3. Simple usage guide or animation that proves the push-to-lock / press-to-release cycle works.

Acceptance criteria: the part must lock with one press, unlock with a second press, survive at least several hundred cycles in TPU, and never rely on additional hardware to operate.