| 摘要 |
A first rigid elongated plate has first and second ends, a first end being hingedly attached to a first end of a rigid link to swing freely towards and away from one side of the link within a predetermined included first arc. A second rigid elongated plate, having first and second ends, is hingedly attached to the other end of the link to swing freely towards and away from the one link side within a predetermined included second arc. A flexible envelope encloses the first and second plates and the link to retain the plates and link in end to end hinged relation. Strap members transversely extend from the envelope and are wrappable around the user's hand, wrist, and forearm to hold the envelope, plates, and link in supporting relation thereto. Each hinge attachment comprises a pair of longitudinally extending, normally offset, transversely spaced legs extending from one of the abutting hinged ends and the other of the abutting hinged ends has a longitudinally extending tongue slidable between the transversely spaced legs. The legs and tongue slidably engage the surfaces of the adjoining link and plate thus limiting the hinged movement between the adjoining link and plate beyond that point where the legs and tongue contact the respective surfaces of the adjoining member.
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