Protection device of automatic instrument

The utility model discloses a protective device of an automatic instrument, comprising two protective covers, the inner walls of the two protective covers are both fixedly connected with two chutes, the inner walls of the two chutes are both slidably connected with slide bars, one end of each slide bar, which is located on the inner wall of the chute, is fixedly connected with a buffer spring, andthe other end of each slide bar is located on the outer wall of the chute. The other ends of the buffer springs are fixedly connected to the inner walls of the protective covers, the other ends of the multiple sliding rods are fixedly connected with the same glass observation mirror, and the outer walls, located on the outer sides of the glass observation mirrors, of the two protective covers arefixedly connected with fixing rings. According to the glass observation mirror, the sliding grooves, the sliding rods and the buffer springs are arranged, and when the glass observation mirror is impacted, the sliding rods on