| 摘要 |
PROBLEM TO BE SOLVED: To provide a shaft cylinder member coupling structure of a writing utensil which can be easily assembled without considering a shaping accuracy of a screw thread to be formed on the shaft cylinder member.SOLUTION: At the inside of an inner cylinder 9 (a second shaft cylinder member), a first female screw section 9a and a second female screw section 9b of which the pitch of the screw thread and/or winding direction of the screw thread are/is different between at one end and at the other end are formed. One end of a connection cylinder 10 which connects a neck section 3 (a first shaft cylinder member) and a body section 3 (the second shaft cylinder member) is fixed to the inside of the neck section 3. A male screw section 10b formed on the other end of the connection cylinder 10 is screwed to the first female screw section 9a of the inner cylinder 9. An adjusting screw cylinder 11 which forms on its outer surface a male screw section 11a is screwed to the second female screw section 9b formed on the other end of the inner cylinder 9. The adjusting screw cylinder 11 is shifted forward and backward with respect to the inner cylinder 9, and the other end of the connection cylinder 10 integrated with the neck section 3 is brought into contact with one end of the adjusting screw cylinder 11, to align the neck section 3 with the inner cylinder 9 with respect to the axial rotation direction. |
