Door control spring

Abstract

The invention relates to the technical field of door control springs, and discloses a door control spring. The door control spring comprises a shell, wherein the surface of the shell is movably connected with a connecting piece, a toothed plate is fixedly connected to the interior of the shell, the surface of the toothed plate is movably connected with an expansion and contraction wheel, the side, away from the toothed plate, of the expansion and contraction wheel is movably connected with an extrusion plate, the side, away from the expansion and contraction wheel, of the extrusion plate is movably connected with a compression spring, and a spring rod is movably connected to the interior of the expansion and contraction wheel. When the expansion and contraction wheel, the spring rod and the spring rod are not in contact, the spring rod loses limiting force and extends, at the moment, the friction force between teeth and the toothed plate and the extrusion plate is large, and the closing speed of a door body tends to be stable; and the elastic force of the compression spring is larger than the elastic force of the spring rod, the friction force between the teeth and the toothed plate and the extrusion plate is gradually reduced in the contraction process of the expansion and contraction wheel, so that the door body is opened in a more labor-saving mode, and the effects of being light in door opening force and more stable in door closing speed are achieved.

Description

technical field [0001] The invention relates to the technical field of door control springs, in particular to a door control sky spring. Background technique [0002] The door control spring is often used to control the opening and closing of the door body. With the continuous development of technology, in order to make the door body more anti-theft, the door body is made more and more heavy, and the door control spring is also developed. [0003] Although the traditional door control spring can play the role of supporting the door body, it can not play a role in assisting some heavier doors, making it more difficult for people to open it. It can be imagined that the heavier door body When closing, the traditional door control spring only plays a role of relief, and the door body has a large inertia when closing, resulting in an unstable closing speed; in addition, the existing door control spring needs to be lubricated inside after a period of use. However, oiling needs to...

AI Technical Summary

Problems solved by technology

[0003] Although the traditional door control spring can play the role of supporting the door body, it can not play a role in assisting some heavier doors, making it more difficult for people to open it. It can be imagined that the heavier door body When closing, the traditional door control spring only plays a role of relief, and the door body has a large inertia when closing, resulting in an unstable closing speed; in addition, the existing door control spring needs to be lubricated inside after a period of use. However, oiling needs to be operated regularly by humans. If people forget, it will reduce the service life of the door control spring. Therefore, the door control sky spring with lighter door opening force and more stable door closing speed came into being.

Images