retracable
Retracable refers to the ability of an object or mechanism to be drawn back or pulled in. This concept is fundamental to many everyday items and complex engineering solutions. In a mechanical context, a retracable feature allows something to extend or deploy and then be safely and efficiently stowed away. This is often achieved through the use of springs, gears, or hydraulic systems.
A common example is a retracable ballpoint pen, where the writing tip can be extended for use
The design of retracable mechanisms prioritizes reliability, durability, and ease of operation. Safety is also a