| 摘要 |
PROBLEM TO BE SOLVED: To enhance working efficiency by simplifying a structure and facilitating assembly. SOLUTION: A coil spring 16 is housed in a compressed state between the front end side of the elastic member housing part of a temple 8 and the contact surface 26 of a cover 20. A two-folded leaf spring 18 is housed in the recessed part of the cover 20 in the state of opening the base end side direction of the temple 8. One end at the two opened front ends of the leaf spring 18 engages with the difference in level on the base of the elastic member housing part to prevent the sliding and removing of the cover 20 in the base end side direction of the temple 8. The outer end face 10a on the base end side of the cover 20 comes into contact with the front end face 6a of a wraparound endpiece 6 in a wearing state. When the temple 8 is further spread beyond the wearing state, the cover 20 is pressed by the front end face 20a of the wraparound endpiece 6 to slide to the front end side along the guiding member of the temple 8 by overcoming the spring force of the coil spring 16 while compressing the coil spring 16. |
