| 摘要 |
PURPOSE:To mount an oil-based ball-point pea refill being easy to obtain on the market, without enlarging a full length of a writing utensil, by making it possible to hold doubly an ink chamber and the ball-point pen refill by making an ink tank have a bag-shaped inner tube part projecting into the ink chamber, and by using the ink chamber for a direct liquid type writing body and the refill for am oil-based ball-point pen. CONSTITUTION:In a so-called direct liquid type writing utensil which has am ink tank 4 storing ink directly in the rear part of a holder tube 1 and has a pen tip 2 at the fore end of the holder tube 1, a bag-shaped inner tube part 5 is formed toward the front of am ink chamber 4a from the rear end of the ink tank 4. In the inner hole 6 of the inner tube part 5, the rear part of a ball- point pen refill 12 is held, while a tip 12a of a ball-point pen is/so provided at the rear end of the holder tube 1 as to be exposed. Besides, a transparent exposing part 3 is provided in the front of the ink task 4, while a rear holder tube 10 having integrally a plng 11 for folding the refill to the rear end of which the fore end of the tip 12a of the ball-point pen piercing it through is fixed is fitted on the outer periphery of the ink tank 4. |
