| 摘要 |
PROBLEM TO BE SOLVED: To obtain a writing instrument without getting tired in fingers even by a writing work for a long time without biasedly acting a force on a specific position of the finger in a deviated manner. SOLUTION: A model of the writing instrument having the same shapes as writing instrument bodies 10, 12 except a grip 20 of the instrument to be manufactured is prepared, and a portion corresponding to the grip 20 is covered with a stamp member. This model is grasped substantially in the same state as in the case of writing by a user, and the member is separated from the model after the member is cured. Then, a female mold is formed of gypsum or the like from the separated member, silicone or the like is cast in the mold, cured to form the grip 20. This grip 20 is mounted at the bodies 10, 12. Thus, the instrument having the grip 20 adapted to the grip intrinsic to the user is completed. |
