| 摘要 |
<p>A length adjustable arm of a pair of spectacles is disclosed. In the arm of this invention, a length adjusting member (200) is telescopically coupled to a fixed guide member (100) in a way such that it is axially slidable relative to the guide member (100) in opposite directions within a predetermined range. The total length of the two telescopically coupled members are thus adjustable. The adjusted length of the arm is held by a locking pin (300) removably seated in either locking seat (211) of a guide slot (210) of the length adjusting member (200). In another embodiment, a plurality of locking holes in place of the locking seats are formed on the fixed guide member along an axial direction, while a spring-biased ball in place of the locking pin in radially set on the length adjusting member and is normally and radially biased.</p> |
