| 摘要 |
A fastening device comprises a hollow box-shaped container-guide (12) inside which a shaft-like fastening member is rotatably received. The fastening member is provided with at least one projecting, eccentric tongue (24), which is inclined with respect to the axis (a) of the shaft, or is preferably shaped according to a section of a helicoid. The fastening member is rotatable between a position in which the locking tongue (24) is contained inside the hollow container (12) and a position in which it projects from it to grip into the walls of a hole which receives the container, or against the wall of a panel. A head (22) of the fastening member (14) can be maneuvered from the outside and has two abutments which collaborate with abutments integral with a head (18) of the container in order to define the completely retracted position of the tongue or tongues and the completely extracted position of the same. The container can be realized in various forms.
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