Acupuncture device for continuous needle insertion by acupuncture and having adjustable needle insertion depth

The invention discloses an acupuncture device for continuous needle insertion by acupuncture and having adjustable needle insertion depth. The acupuncture device comprises a needle gun and a needle case, the needle case is detachably connected to the needle gun, the needle case has a lateral needle outlet having a gradually narrowed width, the needle gun includes a gun body, a trigger, a percussion rod and a percussion spring, the gun body is provided with a plug interface, the plug interface is adapted to an outer contour of the lateral needle outlet of the needle case, the gun body is further provided with a pipe extending through the front and rear ends thereof, the pipe is in line with the lateral needle outlet, the percussion rod is slidably connected to the pipe, and the front end has a permanent magnet firing-pin head, an adjustment mechanism for restricting the insertion depth of the percussion rod into the the gun body at the end thereof, the percussion spring is sleeved on the percussion rod, and th