| 摘要 |
A projector holder comprising a connecting element ( 2 ) which includes a coupling element ( 23 ) for connection of the projector holder to a supporting structure, and at least three arms ( 1 ) which are carried by the connecting element for rotation about mutually parallel axes and for radial displacement relative to said axes, so that a first end ( 10 ) of the arms ( 1 ) can be brought into alignment with threaded openings ( 42 ) in a wall ( 41 ) of a projector housing, wherein each arm ( 1 ) carries a coupling device ( 3 ) for connecting said first end of a respective arm to a nearby threaded opening ( 42 ) in the wall of said housing, and wherein the connecting element ( 2 ) is adapted to releasably secure the second end portions ( 12 ) of the connected arms. The coupling device ( 3 ) includes a screw ( 31 ) which extends through an opening ( 11 ) through the first end portion ( 10 ) of a respective arm ( 1 ) with a given degree of clearance, and two nuts ( 33, 34 ) which co-act with the thread on the screw ( 31 ) and each of which is mounted on a respective side of said arm ( 1 ), wherein the thread on the screw ( 31 ) is able to co-act with the thread in the opening ( 42 ) of the projector housing wall, such as to enable the screw ( 31 ) to be screwed to a desired depth in threaded openings ( 42 ) in said housing wall ( 41 ), wherein the nuts ( 33, 34 ) can be moved along the screw ( 31 ) in a manner to locate the arm ( 1 ) at a chosen distance from the housing wall ( 41 ) and such as to be tightened against said arm and therewith secure the screw ( 31 ) against rotation.
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