THE APPLICATION OF MAGNETIC FEATURES THE HIGH EFFICIENCY OF A CAR DOOR OPENING AND CLOSING DEVICE

摘要

The present invention relates to an automatic opening and closing device enabling a user to open and close a vehicle door easily and simply, capable of obtaining excellent performance, and capable of remarkably reducing an installation space and expenses as a magnetic feature is properly utilized when opening and closing a vehicle door. Namely, in the automatic opening and closing device (A) for the vehicle door of the present invention, the structure of the automatic opening and closing device (A) for the vehicle door is characterized by forming a locking bracket (100) containing iron (Fe) or iron materials capable of being attracted by a magnet to be protruded from the inner side of the vehicle door (10) at a predetermined height; installing a permanent magnet (200), which is capable of maintaining the closed state of the vehicle door by pulling the locking bracket (100) made of iron by a magnetic force, on an inner wall of a fuel reception space (20) where the locking bracket faces; and installing an electromagnet, which enables the locking bracket (100) stuck to the permanent magnetic to be separated from the permanent magnet by eliminating a magnetic force by counteraction between both magnetics when electricity is applied by the operation of a switch by a driver, on the outer periphery of the permanent magnetic (200).