Patent ID: 8920641

Claim:
An end-cap structure of an oil filter for vehicles, comprising a base cap having a mounting hole in a central portion thereof, and a hook cap installed in the mounting hole so as to be movable upwards or downwards, the hook cap comprising: a hollow body provided to be open on a lower end thereof and closed on an upper end thereof; a contact flange protruding outwards from the hollow body so that when the hook cap moves upwards, the contact flange comes into contact with a lower surface of the base cap so as to limit the upward movement of the hook cap, and a sealing against external oil is formed between the hook cap and the base cap; a vertical support part extending from a perimeter of the hollow body and from an upper end of the contact flange, with a locking protrusion provided on an upper end of the vertical support part so that when the hook cap moves downwards, the locking protrusion comes into contact with an upper surface of the base cap so as to limit the downward movement of the hook cap, and a bypass is formed between the vertical support part and the hollow body, the bypass passing through the contact flange; and wherein the vertical support part comprises an auxiliary protrusion protruding outwards so that when the hook cap moves upwards, the auxiliary protrusion comes into contact with the upper surface of the base cap, thus preventing the hook cap from being arbitrarily moved downwards.