| 摘要 |
PROBLEM TO BE SOLVED: To stably obtain jerking to impart adequate resistance to turning action without using the spring characteristic of the elastic sliding member itself by disposing the member to be arranged in a compressed state between a bearing part and abutment part in the spacing part in the state that a shaft is inserted into the bearing part. SOLUTION: A temple 3 is joined with the bearing part 11 of a barrel type having a shaft hole 12 at the end of a wraparound endpiece side 2. The outer peripheral surface near the axial central part of the bearing part 11 is provided with a recessed groove 13 and the annular elastic sliding member 14 by a rubber-like elastic body is fitted into this recessed groove 13. The elastic sliding member 14 is set to a diametral size (outside diameter and the dimensions of a cross-sectional shape) having a compression margin for the spacing between the bearing part 11 and the abutment part 9 and is put into a compressed state by being held between the bearing part 11 and the abutment part 9 in the state of passing the shaft hole 12 of the bearing part 11 and the shaft 8. The jerking of the turning action may be obtained by the sliding resistance generated in the abutment sliding region between the elastic sliding member 14 and the abutment part 9 when the temple 3 is turned relative to the wraparound endpiece 2.
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