Sunglass with multistage stop function and attachment fitting thereof

An attachment fitting for a sunglass freely attachable and detachable to glasses, the attachment fitting comprising:

• a shaft strip, extending in a rod-shaped, to which a sunglass plate is attachable to both ends;
• a base through which the shaft strip passes and rotatable with respect to the shaft strip;
• a base contacting strip contacting one end of the base and fixed so as not to rotate with respect to the shaft strip;
• and
• an elastic receiving strip contacting another end of the base by way of an elastic body and fixed so as not to rotate with respect to the shaft strip;
• wherein
• a ridge part and a valley part of a shape engaging with each other are arranged on ends of the base and the base contacting strip that contact each other along an outer periphery in an alternately continuing manner;
• the elastic body is elastically held between the base and the elastic receiving strip;
• the base contacting strip is pressed towards the base by an elastic force of the elastic body, and held in a stable state with one ridge part engaging with the other valley part;
• and
• when the shaft strip rotates in conjunction with the movement of pushing up/pushing down the sunglass plate, the base contacting strip rotates integrally with the shaft strip while contacting the base, and at the same time, the base contacting strip moves in an axial direction away from the base against the elastic force of the elastic body, and further, the base contacting strip moves in the axial direction towards the base in accordance with a biasing force of the elastic body and again engages the base to return to the stable state, thereby allowing the sunglass plate attached to both ends of the shaft strip to be freely raised upwards and lowered downwards and to be freely stopped in stages.