Patent ID: 11919324
Assignee: KABUSHIKI KAISHA PILOT CORPORATION
Field: Other consumer goods (Other fields)
Classification: CPC B | IPC B

Claim 3:
4. The soft-member attachment structure according to claim 2, wherein:
an inward projection projecting inside the attachment hole is formed on the inner circumferential surface of the attachment hole,
an outward projection projecting outside the attachment portion is formed on an outer circumferential surface of the attachment portion,
when the attachment portion is inserted into the attachment hole, the outward projection rides over the inward projection to lock the outward projection and the inward projection to each other, and
the inner core is held in a position corresponding to the inner circumferential surface of the attachment hole to sandwich the attachment portion between the outer circumferential surface of the inner core and the inward projection of the attachment hole.