Automatic door closer

Abstract

The invention relates to the technical field of timing door closing, in particular to an automatic door closer. The automatic door closer comprises a shell, a transmission gear, a door spindle and a piston, the transmission gear and the piston are installed in the shell, a connecting rotating shaft is arranged in the middle of the transmission gear, one end of the connecting rotating shaft is fixed to the transmission gear, the other end of the connecting rotating shaft extends out of the shell to be connected with the door spindle, the door spindle is further connected with a door, the door drives the door spindle to rotate when rotating, and the transmission gear is further driven to rotate. The automatic door closer is ingenious in design and reasonable in structure, can effectively solve the problem that a building door cannot be automatically closed in the prior art, and is suitable for wide application and popularization.

Description

technical field [0001] The invention relates to the technical field of timing door closing, in particular to an automatic door closer. Background technique [0002] After careful observation, the inventor has found a problem with potential safety hazards that exists widely in life, that is, the traditional gates of unit buildings or gates of unit workshops are relatively traditional due to the mechanical structure used for turning, such as using simple mechanical structures such as springs. When the door does not exceed 70 degrees, it can also close by itself. However, if the passage time needs to be longer, such as moving furniture, etc., it is necessary to push the door to more than 90 degrees, or even stick the door to the wall, so as not to hinder the passage. , but generally after the work is done, few people close the door manually. In this case, because the door exceeds 90°, the door will not close by itself. Small hidden danger; in the prior art, there are also some...

AI Technical Summary

Problems solved by technology

[0002] After careful observation, the inventor has found a problem with potential safety hazards that exists widely in life, that is, the traditional gates of unit buildings or gates of unit workshops are relatively traditional due to the mechanical structure used for turning, such as using simple mechanical structures such as springs. When the door does not exceed 70 degrees, it can also close by itself. However, if the passage time needs to be longer, such as moving furniture, etc., it is necessary to push the door to more than 90 degrees, or even stick the door to the wall, so as not to hinder the passage. , but generally after the work is done, few people close the door manually. In this case, because the door exceeds 90°, the door will not close by itself. Small hidden danger; in the prior art, there are also some gates that control the rotation through electronic structures at regular intervals, but on the one hand, the use of electronics needs to be connected to the circuit, resulting in a substantial increase in the cost of the gate. Very unstable, prone to breakage, and doesn't fit needs any better

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