| 摘要 |
The frame fastener (2) is U-shaped with an outwardly bent support foot (12) at one end. The foot is enclosed by heel components (21) which are downwardly directed from the fastener main body, and has a hole (13) for a fixture screw. A reinforcement is formed as a bulb (14) between the fastener main body and the support foot, and can even serve as a control component for the lower end of the fastener support spring (4). The spring lower end has a recess (15) for the bulb (14). The spring is fixed by a rivet (16) on the frame fastener, and its tongues (5,6) are located at the fastener uper end. One tongue (5) is stirrup-shaped and encloses the other (6) which fits in a recess (18) in the upper part of the fastener. The stirrup-shaped tongue has a hole (19) which is aligned with a hole in the cover surface. If required, locking can occur by means of a plate screw through these two holes which can be brought together to form a slot. |
