| 摘要 |
The present invention relates to a drainage trap for preventing odour and sewage from flowing back to the inside while discharging the sewage. The drainage trap is to prevent malfunction caused since an opening and closing structure of a rotation cover is caught due to scale and improves a restoration force of the opening and closing structure of the rotation cover formed in the drainage trap by using a wire. The drainage trap includes a body, wherein a lower end is formed in a slope unit and the body is formed as a penetrated pipe, and a rotary mounting unit on one side of the body. A rotation unit is formed in the rotary mounting unit, and a rotary cover is hinged to block an outlet of the body. An elliptical wire is mounted on the rotary cover and the body. A small diameter part of the wire is mounted to be attached to the body and the rotary cover, and a large diameter part of the wire is unoccupied so that the rotary cover maintains a closed state on the body and is elastically opened or closed since the gap of the wire becomes narrow when the rotary cover is open. |
