"Spring-loaded" refers to a mechanism that uses a spring to store energy and release it when needed. This design allows for quick and efficient movement, making it useful in various applications, such as toys, tools, and machinery. When the spring is compressed or stretched, it holds potential energy, which is released to perform work when the mechanism is activated. Common examples of spring-loaded devices include ballpoint pens, toy guns, and trapdoors. In these devices, the spring helps to create a force that propels an object or returns it to its original position. This functionality enhances performance and user experience in everyday items.