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    • 64. 发明公开
    • Magnetically releasable clamp
    • 磁性可释放夹
    • EP0621385A2
    • 1994-10-26
    • EP94301464.7
    • 1994-03-01
    • SECURITY TAG SYSTEMS, INC.
    • Hogan, Dennis L.
    • E05B67/22E05B73/00B65D55/10
    • E05B73/0052E05B67/003E05B73/0017Y10T24/14Y10T24/3976Y10T24/3993Y10T24/4614
    • A clamp includes a U-shaped member (10) having a pair of legs (14), with each leg having a cavity (16) in the side of the leg facing the other leg; and a clutch (11) for receiving and restraining the legs of the U-shaped member. Pads (20) are attached to the insides of the legs for clamping an article between the legs to deter the theft of such article. The clutch includes a housing (12) defining a pair of longitudinal channels (22) for respectively receiving the legs of the U-shaped member and a chamber (24) between the channels, with the chamber being open to the channels; two balls (26) disposed for movement within the chamber; a highly magnetically attractive plunger (28) disposed within and at one end (30) of the chamber: and a spring (38) for biasing the plunger to move into such contact with the balls as to force the balls against respective inclined surfaces (34, 36) disposed at the other end of the chamber for respectively guiding the balls toward different channels. When the legs of the U-shaped member are inserted into the channels so that the cavities are respectively adjacent the balls while the plunger is forcing the balls against the inclined surfaces, the inclined surfaces guide the balls respectively into the cavities and into contact with portions of the respective legs adjacent the respective cavities to thereby restrain the legs of the U-shaped member in the housing. To release the legs from the clutch, a magnet (48) is placed adjacent the one end (50) of the housing to magnetically attract the plunger and the balls toward the one end of the chamber and thereby release each ball from a locked position between the respective inclined surface and the portion of the leg that contacts the ball.
    • 夹具包括具有一对腿部(14)的U形构件(10),每个腿部在腿部侧面具有朝向另一腿部的腔体(16); 和用于接收和限制U形构件的腿的离合器(11)。 垫(20)连接到腿的内侧,用于夹持腿部之间的物品以防止这种物品被盗。 离合器包括限定用于分别容纳U形构件的腿部的一对纵向通道(22)和在通道之间的腔室(24)的壳体(12),腔室通向通道; 两个球(26),其设置用于在腔室内移动; 一个设置在腔室内和端部(30)内的高度磁力吸引的柱塞(28);以及一个弹簧(38),用于偏压柱塞以与球体接触以迫使球体抵靠相应的倾斜表面(34 ,36)设置在腔室的另一端,用于分别将球导向不同的通道。 当U形构件的腿部插入通道中,使得腔体分别邻近球体,而柱塞迫使球体抵靠倾斜表面时,倾斜表面将球体分别引导到腔体中并与部分 分别靠近相应的空腔,从而将U形构件的腿限制在壳体中。 为了从离合器释放腿部,将磁体(48)放置在壳体的一个端部(50)附近,以将柱塞和球体磁吸引到腔室的一端,从而将每个球从锁定位置 相应的倾斜表面和接触球的腿的部分。