Abstract: A backrest safety mechanism is disclosed. The backrest safety mechanism includes a backrest frame, a seat frame, and an angle-adjusting device. A side of the angle-adjusting device is connected to the backrest frame, and another side of the angle-adjusting device is connected to the seat frame. When the backrest frame is located at a front limiting position or a rear limiting position, limiting structures respectively disposed on the backrest frame and the seat frame abut against each other.
Abstract: A backrest safety mechanism is disclosed. The backrest safety mechanism includes a backrest frame, a seat frame, and an angle adjusting device. A side of the angle adjusting device is connected to the backrest frame, and another side of the angle adjusting device is connected to the seat frame. When the backrest frame is located at a front limiting position or a rear limiting position, limiting structures respectively disposed on the backrest frame and the seat frame abut against each other.