Reverse Engineering: Mechanical Product - Visual Analysis

This is a picture of the button you push at the bottom of the pen to start writing with it.

This is a picture of the tip of the pen that comes out when you push down on the button at the bottom of the pen.

Product Analysis:

Visual Analysis:

Some Visual Design Elements of this pen are that it's a black color, very smooth, it has a straight line shape, and has lines if you reflect it on light.

Some Visual Design Principles that the pen follows are balance because it can stand up and not move when placed flat on a surface and unity because the springs, the pen, and the case all work as one.