| 摘要 |
A composite writing instrument comprising a writing instrument mechanism having a plurality of refills and a rod-like delivery mechanism, said composite writing instrument comprising a middle shaft provided between a front shaft and a rear shaft, return springs having one ends stopped at said middle shaft to bias said refills, respectively, backward; sliding cams mounted at rear portions of said refills and stopped at the other ends of said return springs to be biased backward, a cam body having at a front portion a cam operating portion which presses the rear end of either of said sliding cams to selectively advance said refills, and comprising an engaging portion engaged with said middle shaft so that said engaging portion is slidably moved in the direction of said front shaft and is rotatable, said cam body being formed with a helical groove in an inner periphery at the rear portion thereof, a guide tube fitted rotatably with said cam body and formed with a guide groove in the axial direction, and a slider provided within said guide tube and comprising an engaging projection in engagement with the helical groove of said cam body, said slider holding a rod-like article and being slidable in the axial direction along the groove of the guide tube.
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