| 摘要 |
A retractable post assembly with alarm function is disclosed. The retractable post assembly includes: a stationary post being a column member; a moveable post being a column member and moveably sleeved with the stationary post; and an alarm device, such as an air whistle, an electrically-controlled buzzer unit, and an electrically-controlled alarm lamp unit, installed in the retractable post assembly at a proper location. When the moveable post is making a relative movement with respect to the stationary post, the alarm device senses the movement and raises an alarm accordingly. |
