WATER PROOFING BOOTS STRUCTURE OF DOOR LOCK ACTUATOR OF AUTOMOBILES

摘要

PURPOSE: A water proofing boots structure improves a part of a water proofing boots so as to prevents a pumping effect when a lead shaft is inserted and drawn and the infiltration of moisture. CONSTITUTION: A water proofing boots(2) comprises an upper assembling part(21), a cylinder part(22) and a wrinkle part(23). The cylinder part(22) is inserted tightly into a front end part of a case. The wrinkle part(23) is formed between the assembling part(21) and the cylinder part(22). More than one protuberance part(24) is formed between the wrinkle part(23) and the cylinder part(22). An air hole(24a) is formed on one side of the protuberance part(24) to secure an allowance space. When a lead shaft is inserted/drawn into the water proofing boots(2) to stretch/shorten the wrinkle part(23), the protuberance part(24) reduces compression/suction action.