HuddleWrist Padded Bumper — a shock absorber for the Apple Watch
Quarterbacks take hits, and the watch on their wrist takes them too. I designed a padded TPU bumper that wraps the Apple Watch running HuddleWrist, absorbing impact at the edges and holding a raised lip above the screen so the glass never meets the turf first.
3D Product Design
CAD Model
TPU 95A
FDM Prototyping
GD&T (ASME Y14.5)
Prototype
3D-Printed Bumper
FDM test print. Open windows keep the Digital Crown and side button free to click and rotate, and end openings let the band connectors pass through.
On the Wrist
Fit check on an Apple Watch Series 3 (38 mm) running HuddleWrist. The screen stays fully readable for the play call.
Design Specs
- Fits
- Apple Watch Series 3, 38 mm aluminum (case 38.60 × 33.30 × 11.40 mm)
- Bumper size
- 38.80 × 44.10 × 12.90 mm, about 3 g
- Screen stand-off
- Front lip stands 1.50 mm above the cover glass and overhangs the glass edge by 1.00 mm all around
- Wall
- 2.50 mm TPU wall with 0.25 mm fit clearance per side
- Material
- TPU, Shore 95A: flexible enough to soak up impact, stiff enough to hold the watch. No metal or ferromagnetic content.
- Openings
- Digital Crown window (11.00 mm), side button window (13.00 mm), speaker/mic slot (14.00 × 4.00 mm). Back sensor and charging interface stay uncovered.
- Bands
- 29.00 mm end openings; installs from the back with the bands attached
- Prototype print
- FDM TPU 95A, 3 perimeters, 0.20 mm layers, printed back face down