Chin-rest and base folding arrangement for an ophthalmic instrument

摘要

A base support arm is provided for an ophthalmic instrument with a moveable optics head. The base support arm is configured so that the support arm must be deployed to stabilize the instrument before the instrument head can be moved sideways in a manner that could otherwise destabilize the instrument. In addition, an angled chin-rest assembly pivot axis is provided that moves the chin-rest assembly from a compactly folded shape into a position that is suitable for supporting the patient's head. The support arm is linked to the chin-rest assembly pivot by a linkage or other mechanism so that movement of the support arm also unfolds the chin-rest assembly and ensures that the chin-rest assembly cannot be unfolded without deploying the support arm.

主权项

1. An arrangement of a base and folding chin-rest for an ophthalmic instrument including:
an ophthalmic instrument that includes a base, a moveable ophthalmic instrument head and a chin-rest assembly; a chin-rest assembly that includes a forehead rest and a chin-rest to stabilize the subject's head, and a means to rotate the chin-rest assembly to fold closely against the moveable ophthalmic instrument head without needing to detach the base, the moveable ophthalmic instrument head, or the chin-rest assembly, and wherein the chin-rest assembly rotates around one front corner of the base of the instrument and the projection of the chin-rest assembly rotation axis passes through a point near the top of the chin-rest assembly above the other front corner of the instrument such that the chin-rest assembly rotates backwards and downwards as it is rotated into the transport position; and a support arm which fits within or compactly against the base for transport, then folds or slides out to stabilize the ophthalmic instrument when the moveable instrument head is moved sideways in use.