| 摘要 |
An anchor adapted for insertion in a hole through the wall. The wall includes inner and outer surfaces with the hole extending inwardly through the wall from the outer surface of the wall to the inner surface of the wall. The anchor comprises a head, a body, and a passage through the head and body into which a fastener, such as a screw, is adapted to be inserted. The passage has a central longitudinal axis. A surface on the head is engageable with the outer surface of the wall when the body of the anchor is inserted in the hole. At least one resiliently flexible leg extends axially of the body and terminates in a free end moveable generally radially inward and outward relative to the central axis of the body. The anchor also has a holder adjacent to the free end of the leg. The holder projects laterally outwardly from the leg. The leg is adapted to resiliently flex generally radially inwardly as the body is inserted in the hole to a point where the holder exits the hole on the inside surface of the wall. The leg, thereafter, is adapted to resiliently snap generally radially outwardly to a locking position where the holder extends beyond the hole and overlaps the inside surface of the wall to prevent the body from being pulled back through the hole. The distance between the wall-engaging surface of the head and the holder is essentially identical to the thickness of the wall so that when the holder is in the locking position the anchor cannot be moved axially with respect to the hole in the wall.
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