| 摘要 |
PROBLEM TO BE SOLVED: To properly absorb an excessive strength on penmanship by writing, and reduce the wear of a ball due to a frictional resistance, and a liquid leakage by forming a soft barrel of a flexible material to rigid one, and is suitable for writing. SOLUTION: For a flexible ball-point pen, a flexible ink tube 1 wherein a ball 2 which is the same as a conventional ball-point pen, is used. Then, for a flexible barrel 3, an appropriate material such as rubber or a synthetic soft resin of a flexible operation to rigid and flexible resin suitable for writing is used, and the flexible barrel 3 is formed to be detachable. When an excessive strength on penmanship due to writing is applied to a ball 2, a flexible operation is formed by combining with the flexible ink tube 1. By this constitution, a frictional resistance of the ball 2 by an expressive strength on penmanship, and a fine natural oscillation due to the unevenness of a paper surface are properly absorbed, and the wear of the ball 2 and a liquid leakage are reduced. Also, when the hardness of the flexible barrel 3 is changed, a writing feeling from a light and flexible feeling to a hard writing feeling can be selected. |
