What is claimed is:
1. A swivel snap hook of synthetic resin including: a hook body having a hook extended from a base portion of the hook body; and a stopper piece having a front-end outside engaging face to be engaged with a front-end inside engaging face of a curved portion of the hook body, the front-end outside engaging face being extended up to the front-end inside engaging face, said stopper piece being elastically deformable with respect to a base end thereof as a fulcrum, wherein at least the front-end inside engaging face of the curved portion has a protrusion having a minute protruding height and protruded toward the front-end outside engaging face of the stopper piece.
2. A swivel snap hook of synthetic resin according to claim 1, wherein a minute portion of a tip end of the protrusion is molded integrally with the front-end outside engaging face of the stopper piece.
3. A swivel snap hook of synthetic resin including: a hook body having a hook extended from a base portion of the hook body; and a stopper piece having a front-end outside engaging face to be engaged with a front-end inside engaging face of a curved portion of the hook body, the front-end outside engaging face being extended up to the front-end inside engaging face, said stopper piece being elastically deformable with respect to a base end thereof as a fulcrum, wherein at least the front-end outside engaging face of the stopper piece has a protrusion having a minute height and protruded toward the front-end inside engaging face of the curved portion.
4. A swivel snap hook of synthetic resin according to claim 3, wherein a minute portion of a tip end of the protrusion on the front-end outside engaging face of the stopper piece is integrally molded with the front-end inside engaging face of the curved portion.
5. A swivel snap hook of synthetic resin according to claim 1 or 3, further including a rib-like protrusion provided below the front-end inside engaging face of the curved portion, the rib-like protrusion having an inside end face on an extension of a front-end inside face of the stopper piece.
6. A swivel snap hook of synthetic resin according to claim 5, wherein a height of the rib-like protrusion is slightly shorter than a gap between the stopper piece and the bottom face of the hook body.
7. A swivel snap hook of synthetic resin according to claim 5, wherein the rib-like protrusion is connected to the protrusion having a minute protruding height and protruded from the inside engaging face of the curved portion.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of recording data to an information storage medium comprising,
obtaining an optimal recording condition using an optimal power control area in a first information storage layer andor a second information storage layer; and
recording data to the first andor second information storage layers according to the obtained optimal recording condition, wherein:
the first information storage layer is adjacent to the second information storage layer,
the first information storage layer comprises a first optimal power control area and a first reserved area adjacent to the first optimal power control area,
the second information storage layer comprises a second optimal power control area and a second reserved area adjacent to the second optimal power control area,
a beginning or an end of the first optimal power control area of the first information storage layer is aligned with a beginning or an end of the second reserved area of the second information storage layer, and
a beginning or an end of the second optimal power control area of the second information storage layer is aligned with a beginning or an end of the first reserved area of the first information storage layer.
2. The method of claim 1, wherein the first and second optimal power control areas are recorded in opposite directions.