| 摘要 |
A releasably lockable joint which is particularly intended for use as the knee joint of an orthopaedic leg support comprises first and second members (10, 11) pivoted together for relative flexing movement and having faces (13,14) which abut to prevent movement of the joint beyond the unflexed position. A sliding detent (20) in a slot (19) in the member (11) is resiliently biased into engagement with a lock surface (17) of a recess or shoulder (17, 18) in the adjoining end of the member (10) to lock the joint in the unflexed position. The detent (20) is actuated by a release (26) which is preferably in the form of an external ring pivoted to the front edge of the second member (11) and connected at an intermediate position to the detent (20) by means of a pivot pin (28). Preferably the detent (20) exerts a wedging action on the lock face (17) so as to minimise play as the joint wears in service. The joint may be provided as a separate sub-assembly for fitting to plain steels. The joint can be used by patients requiring a ring-catch, bar lock or cable release mechanism without alteration to any operating part except the release member. |
