Orion AM worked with MTC under the AMable consortium to perform a Design for Additive Manufacturing (DfAM) review of an underwater camera housing. The design showed below was the design proposed by Orion AM.
Figure N°1 - NIMAS Underwater Camera Housing
Over Centre Clips / Toggle Latches
Available in various different strengths & configurations, including: solid, spring-loaded, safety release, adjustable length and lockable.
Quick & easy to operate
Figure N°2 - Latching Clips
1- Commonplace in many plastic applications, including in 3DP
2- May be separable or permanent, depending on the design of the snap fittings
3- Robustness of fittings is highly dependent on print orientation
Sliding Lid Concept
Key features: Sliding window assembly is constructed upside down and slid into place into a slot in the main housing. The window assembly is held in place by snap fits at the end of the slot, which can be pinched to release.
Advantages: Slot design constrains the window assembly in all directions without the need for any fasteners. The snap fit may be removed in favor of a single screw at the open end of the slot to hold the window in place.
Disadvantages: Insufficient downward pressure from above may prevent the assembly from holding pressure.
Push Fit Concept
Key features: Acrylic window fitted from above by pressing downwards, several snap fittings evenly distributed around housing and recessed seating for an acrylic window to achieve a tight fit.
Advantages: Internal components can be easily accessed by pinching the flexible limbs to release the window, and lifting it out, potential to assemble without any additional fasteners and manufacturable in a single part.
Disadvantages: Requires support material to print overhanging features.