| 摘要 |
The invention concerns an actuating component (16) secured to the frame (5) of the door (2) and a locking component (25) borne by the sash (3) whereon the door frame is pivotally mounted. When the door is opened, one end (29) of the locking component is automatically urged to be engaged into a housing (31) of a fixed structure (12) of the heater so as to counter the vertical movement of the door-sash assembly (6). When the door is closed, the actuating component actuates the locking component (25) and releases the end of the locking component from the housing (31) of the fixed structure, thereby allowing the vertical movement of the door-sash assembly. |
