Case Study 03

Modular Phone Case

A three-part product architecture using snap-fit and press-fit interfaces to combine protection, grip, modularity, and a camera privacy feature.

Modular Phone Case

Assembly is part of the design.

The case study is organized component by component so each design decision can be seen independently—no four-image collage.

The source material supports a three-part architecture: inner case, outer shell, and camera slider.

01
Outer shell

Start with the protective outer architecture.

The perforated outer shell provides the modular protective layer and side-grip concept.

Outer shellModular protection
Phone case outer shell
02
Inner case

Create the phone-fitting base.

The inner case is responsible for primary phone fit and supports the interface used by the slider feature.

Inner casePhone fit
Phone case inner case
03
Assembly

Bring the shell and inner case together.

The architecture uses a snap-fit relationship rather than screws or loose fasteners.

Snap-fitNo loose fasteners
Phone case assembled housing
04
Camera slider

Add the privacy feature as a separate component.

The camera slider press-fits into the inner-case slot and moves to cover the camera.

Press-fitCamera privacy
Phone case camera slider
05
Integrated concept

Review the assembled product.

The three-part system combines the inner case, optional protective shell, and camera slider into a single product architecture.

3 partsDFADFAM
Completed modular phone case
Architecture
3

Total parts. No conventional fasteners.

The concept minimizes part count and assembly steps through snap-fit and press-fit interfaces.

Next validation — not completed

The portfolio identifies tolerance/fit study, drop and impact testing, and material/process selection as future validation activities. They remain clearly labeled as next steps rather than completed tests.