| 摘要 |
1287818 Stud and socket fastening Mc- SHERRY ASSOCIATES 22 April 1970 [23 April 1969 10 July 1969] 19330/70 Heading E2B [Also in Division F2] A fastener comprises a head 31 with two resilient flexible connectors 33, 34 joining the head to two arms which are flexibly connected in order that they are collapsed or collapsible between the connectors for insertion into an aperture in a member or members and are expandible to an extended over-centre position beyond the aperture and retained by pressure exerted by the connectors. In a modification, Fig. 12, toggle arms 112, 113 extend from an actuator 127 which is integral with a head covering 132 with recesses which acommodate head parts 122, 123 on flexible connectors 115, 116. when the actuator is inserted in the aperture and expands the toggle arms 112, 113. In a further modification the head covering is omitted. In further modifications the fastener is provided with toggle arms with interengaging gear teeth or the toggle arms are connected by a pivot pin to a plunger for extending the arms or a screw passing through openings in the ends of the arms expands the arms and is then tightened to tension the connection or the connectors are attached to a threaded stem and a nut is tightened thereon to tension the connection. The fastener may have more than two toggle arms. The head of the fastener may take the form of a container, Fig. 26, not shown, or two fasteners may be joined by a head part and the form of a rod and used for spacing two panels. The fastener may be moulded from synthetic resin material.
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