Roller blind for car has section of cap comprising first sub-section with slightly large attack angle, and second sub-section with low attack angle touching spires of spring

摘要

Cap has section (21) introduced in end of spring; section (22) ensuring fixing of cap at end of spring; and section (23) attaching cap to housing. Section (22) has groove (221) with development (222) avoiding spires to escape from groove. Introduction part has first sub-part (211) with attack angle of 30 deg , and second sub-part (212) with small attack angle so as to touch spring spires. An Independent claim is also included for the description of the cap attaching roller to spiral spring.