发条装置

例句：

1. 1. The clock has a spring mechanism that makes it easy to wind up.
   这台钟有一个弹簧机制，使上弦变得很容易。
2. 2. The spring-loaded switch is designed to automatically turn on when the door is opened.
   弹簧加载的开关设计成当门打开时自动开启。
3. 3. The spring-loaded bolt keeps the door securely locked.
   弹簧加载的螺栓使门安全地锁定。