| 摘要 |
<p>Disclosed is a double chuck type mechanical pencil and an internal writing mechanism thereof comprising a feed chuck (9) for feeding a normal lead, and a tip chuck (5) for holding the tip of a lead for reducing a residual lead. The double chuck type mechanical pencil comprises a lead tank (13) provided movably in a longitudinal direction within a barrel, a feed chuck connected to the lead tank to feed leads, a chuck ring (10) loosely fitted in the feed chuck, a sleeve provided externally of the feed chuck, a chuck spring (11) provided between the sleeve and the lead tank, an inner tube (12) provided externally of the sleeve and movable integrally with the sleeve, a cushion spring (15) provided between the inner tube and the barrel, a tip chuck provided on the end part of the inner tube, a tip ring (6) provided externally of the tip chuck, and a tip spring (7) provided between the tip chuck and the inner tube. <IMAGE></p> |
