Adjustable chair arm

The utility model discloses an adjustable chair arm, include mounting components, install the handrail assembly on mounting components and install the adjusting part on handrail assembly, mounting components includes mounting disc and ring gear, and the mounting disc includes the disk body and extend the axis of rotation from the disk body center along the direction of perpendicular to disk body,and the ring gear is fixed in the axis of rotation, and the ring gear includes cylindrical circle body and the latch of interval distribution on circle body circumference wall, the handrail assembly cover is established in the axis of rotation, the adjusting part includes push rod, compression spring and lock claw, and the push rod is installed in handrail assembly, and the compression spring cover is established on the push rod, and rotationally install in handrail assembly at the middle part of lock claw, and the one end of lock claw links to each other with the terminal of push rod, and theother end of lock claw is