Telescopic Spectacle Temple Nested Fingers Guidance

The patent implements a nested finger structure where four fingers are nested within each other in a telescopic arrangement. Each finger can slide relative to the others along a common axis while the orthogonal cross core guides their movement, preventing rotational misalignment and jamming. This nested configuration allows precise telescopic adjustment while maintaining reliability through the guiding mechanism.

The orthogonal cross core acts as an intermediary guiding element between the nested fingers. It provides precise geometric constraints that guide the sliding movement of all four fingers simultaneously, ensuring they move parallel to each other without rotation. This intermediary structure enables long fingers to maintain both ease of adjustment and high guidance precision.

The four fingers are nested within each other in a telescopic arrangement, with the orthogonal cross core positioned within this nested structure. When the temple is in the retracted position, the fingers completely enclose the core, making it invisible from the outside. This nested configuration maintains structural integrity while achieving clean aesthetics in the retracted state.