Clip On Sunglasses Case - One Handed Operation

This is a clip-on sunglasses case that can be opened and closed with one hand (this was a challenge for this design). 

This is more a concept design that was inspired by a friend's discussion
and I wanted to see if:

1. The case can be operated by a single hand,

2. You can operate the case with left and right hand,

3. The case has minimum parts and no assembly steps required,

4. Should have that satisfying "click" sound,

5. Should be ergonomically descent

What could be better?

1. Overall look

2. Some TPU inserts to prevent clip-on frame scratches and bouncing

3. Maybe the whole thing could be printed with TPU (Shore 85A? or Maybe 90A) - Tested result is "meh..."

4. Could be smaller, walls thinner (Additional optimization after making this concept.

5. Remove the need for supports

6. Try to avoid scratch marks on the internal part sidewall - design optimization

General post print notes:

• Assembly printed in place - no assembly required. 

• First use will require some support cleaning and multiple movements until the mechanism gains some movement tolerance.

Mandatory print settings: 

Wall loops: 4
Support: Yes (Tree support)
Recommended filament: ASA or ABS (but other should work...)
Print orientation: As in the pictures!


Disclaimer:

• You are responsible to ensure that your clip-on sunglasses are not damaged/scratched - this is only a concept design.