Automatic Door Close Apparatus for protect the destroy of the Spring and Stamp Certification Unit thereof with waterproof, dustproof, windproof, mothproof function

摘要

The present invention relates to a door closing device for automatically closing a door with a spring, comprising: a support; a door coupled to the support and provided to be movable between an open position and a closed position to be opened and closed with respect to the support; a spring having one end coupled to the support and the other end coupled to the door to provide an elastic deformation force to allow the door to return to the closed position; and a wire coupled to the inside of the spring with a length set to limit the opening of the spring beyond the open position. According to the present invention, in a structure in which the door is automatically closed by the tension spring, the user excessively opens the door to exceed the elastic range of the tension spring, thereby limiting the opening range of the door to prevent loss of function and damage of the spring. It is possible to automatically close the door while guiding the door opening and closing process more stably.