| 摘要 |
1. A disengageable link mechanism between any two parts or members, consisting of at least one arm (3), terminating at one of its ends in a ball and socket joint (4) housed in a cage (6) in the form of a spherical cap and arranged in a support (1) having a bore (9) which opens into this cage and serves to house a member (12) which is subjected to an adjustable thrust, characterised in that this member consists of a ball (12) which, in the engaged position, enters a cavity (14a) formed in the ball and socket joint (4) of the arm (3), this member, in the engaged position, automatically returning the arm (3) to a precise position which is always absolutely the same. |
