| 摘要 |
A bowler's dual position wrist and finger control device is disclosed. The device comprises a hand plate and a forearm plate pivotally linked by a double position hinge mechanism. The double position hinge mechanism angularly disposes the hand plate and forearm plate to each other and limits any backward angular movement beyond this limit, thereby restricting the backward movement of a bowler's hand during delivery of a bowling ball. The double position hinge mechanism allows the user to pre-select two such angles of disposition and limitation in the same plane, and to chose between them by positioning a release lever up or down. The invention further discloses the use of finger supports secured to the hand plate to provide additional support for the bowler. In the preferred embodiment the finger supports are laterally pivotable about the hand plate to enable the user to adjust the supports to a comfortable position.
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