Structural principle and application of self-locking device of automatic telescopic cable reel and tracheal reel: Automatic telescopic cable reel is suitable for winding cable, which has the advantages of simple structure, safety and reliability, long service life and easy installation and use.

The automatic telescopic cable reel and the tracheal reel are located between the left and right shells through the fixed shaft, the reel spring, and the self-locking pawl, the two sides of the drum are provided with reels, wherein: the coil spring and the self-locking pawl are respectively provided on both sides of the inside of the drum, the inner end of the spring is fixed connected to the fixed shaft, the outer end is fixed connected with the drum wall, the self-locking pawl is set on the fixed seat fixed connected to the fixed shaft, the return spring is provided between the self-locking pawl and the pawl seat, and the curved inner teeth are provided on the drum corresponding to the tip of the self-locking pawl, The tip of the self-locking pawl is mated to the curved inner teeth.

In the process of pulling out the cable and the trachea, the drum rotates, when the pawl and the arc inner teeth to the reel, release the hand, the pawl blocks the drum so that the wire and the trachea remain locked and cannot be recycled, when it is necessary to recycle, pull the wire and trachea outward, so that the pawl crosses the arc-shaped inner teeth of the drum, at this time, driven by the internal coil spring, the wire and the trachea are recycled. When the reel you need is fixed to the equipment and lift, you need to remove the self-locking pawls to ensure that the wires and tubing in the reel move smoothly with the equipment.