The Capsule Vault is a compact and secure storage solution with a combination lock designed to complement the modular Travel Capsule, which is available in various sizes. It features a 4-digit combination lock mechanism with four numbered dials, offering 10,000 possible password combinations for enhanced security. The password can be fully customized by repositioning the outer dials during assembly, allowing for flexibility and personalization.
To unlock the vault, dial the correct combination, and the spring-loaded mechanism engages, allowing the cap to lock into the thread. This enables the thread to turn and the container to open. When the wrong code is dialed, the cap continues to slip, preventing the thread from engaging and keeping the container securely locked. To lock the vault, simply turn two of the dial rings in opposite directions, reactivating the locking mechanism.
Two options are available for the internal spring: a 3D-printed PLA spring or adapters for metal springs. Metal springs are recommended, as PLA springs will lose their elasticity after a short period of time due to constant compression (creep). The printed spring is intended solely as a temporary solution to get started quickly for testing and experimenting with the mechanism if metal springs are not immediately available.
For the prototype, I used metal springs sized 7.5 x 35.8 x 0.7 mm. Springs from Bambu Lab's Maker's Supply have also been tested and work well with this setup, particularly the 0.6 x 8 x 40 mm springs (BB017).
Metal spring (7.5mm x 35.8mm x 0.7 mm)
Attach the Cap
Place the cap on top of the assembly. It fits in two positions, so ensure the marking on the side of the cap aligns with your desired pin. When pushing down the cap, it will push out the center screw from the bottom. Hold the entire assembly in your hands during this step. If the assembly is lying on a flat surface, the screw on the bottom cannot be pushed out properly.
Secure with the Screw
Finally, screw in the center screw from the bottom to secure the entire assembly.
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