Torsion-type automatic door closer

Abstract

The invention discloses a torsion-type automatic door closer, comprising a triangle positioner arranged on a doorframe, a stressed seat arranged on a door leaf and a bent torsion shaft, wherein, the extended end of the triangle positioner is provided with a torsion tube which can be provided with a torsion spring, and the stressed seat is provided with a shaft hole; the bent torsion shaft is the muff coupling type; a pressure spring is arranged in a muff coupling hole, and a torsion spring is arranged in the torsion tube; one end of the bent torsion shaft is inserted into a rotary drum, and the other end thereof is inserted into the stressed seat. One end of the torsion spring is fixed on the rotary drum, and the other end thereof is fixed on the bent shaft. The invention has simple structure and high stability. The mounting position of the stressed seat is far away from the door shaft, and the movable moment arm is bigger when an automatic door works, thus, the door closing effect is better.

Description

technical field [0001] The present invention relates to doors for houses. Background technique [0002] Existing house door all is made up of door frame, door leaf and door. When closing the door, it is very inconvenient to rely on people to push the door by hand. Especially in public places, the opening and closing of the door is frequent, and the situation that the door should be closed but not closed often occurs, which brings a lot of inconvenience to people's life and work. In order to realize automatic door closing, a spring can also be hung on the door leaf, but in this way, not only the door leaf is damaged but also unsightly, and the noise generated when closing the door is relatively large. Door closers on the market are various at present, each has advantages and disadvantages, and the automatic door closer of the present invention is different in structure from existing door closers on the market. Contents of the invention [0003] The purpose of the present...

AI Technical Summary

Problems solved by technology

It is very inconvenient to push the door by hand when closing the door

Especially in public places, the door is frequently opened and closed, and the door is often closed but not closed, which brings a lot of inconvenience to people's life and work.

In order to realize automatic door closing, a spring can also be hung on the door leaf, but in this way, the door leaf is not only damaged but also unsightly, and the noise generated when closing the door is relatively large

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