Electronic device

An electronic device comprising:

• a viewing frame;
• a window disposed in the viewing frame;
• a projector configured to direct light toward the window;
• and
• a securement arm extending from the viewing frame, the securement arm comprising:
• a first portion including a first electronic component;
• a joint;
• a second portion including a second electronic component, the second portion coupled to the first portion at the joint, the second portion having a resting position;
• a biasing member having a preload and configured to resist a movement of the second portion away from the resting position;
• and
• an adjustment member configured to adjust the preload.

A head-mountable device comprising:

• a frame;
• an optically transparent window secured to the frame;
• a first securement arm extending from the frame;
• and
• a second securement arm extending from the frame, each of the first securement arm and the second securement arm comprising:
• a first portion coupled to the frame;
• a second portion;
• a joint coupling the second portion to the first portion;
• a biasing member providing a force resisting a rotation of the second portion away from the frame;
• and
• an adjustment member configured to adjust the force.