Snap and Lock Strap for CMF Phone 2

Introducing the Snap and Lock Strap — a fully 3D printed wearable with a clever snap-and-twist locking mechanism that allows you to carry your CMF Phone 2 hands-free! This durable, lightweight solution is your perfect companion whether you are running errands, out exploring or powering through your daily workout. Appended in the preview pane above is a GIF displaying the functionality (with a mini box substitute since I don’t have the phone:)

Design

The design incorporates 2 different mechanisms:

1) Adjustable strap with functioning buckle.

For the strap, I uses a series of hinges in a linear distribution to be printed directly, taking advantage of the fact that FDM allows for short bridges to be fabricated, without bonding to the surrounding objects. The buckle directly interfaces with the chain links, allowing them to be fed through the ends, pulled over an extruded ledge and finally having one link completely enclosed via the buckle head (a strong 2 point locking system).

2) Turn and lock mechanism interface for phone interface.

For the utility interface, I designed a form of bayonet lock with bending ledges (acting as a form of spring) used in trinity to allow for a stable and controlled locking mechanism. This can be added directly onto the desired utility while the counterpart is affixed to the strap.

Assembly and Usage

To assemble, snap the different strap components into place (as indicated in the appended image).

For usage, simply feed the band into the buckle and seal in place (once wrapped around arm). Mechanism 2 can be activated even when the strap is already on your arm (quick and easy addition and removal system)!

Printing

On all parts, I used the following:

• 15% infill
• 0.1mm layer height
• Automatically painted on supports
• Organic support structure
• No brim

Step 5: Explore and Advance

All good products require extensive field testing and rely on the feedback of users to achieve perfection.

I look forward to your reviews and wish you much success with this new Snap and Lock Strap printable!