Grip auxiliary machinery hand

The utility model discloses a grip auxiliary machinery hand, dactylotheca and sub -arm, the corresponding staff forearm of sub -arm can be fixed in on the staff forearm, the dactylotheca embolias in the finger, correspond in the dactylotheca and indicate that face department is provided with the fingertip sensor, correspond nail face department and be equipped with the touch switch, be provided with control chip, pulling device on the sub -arm, fingertip sensor, touch switch and pulling device are connected with the control chip electricity respectively, the pulling device passes through the driving rope and is connected with the dactylotheca, when the staff needs grip, indicate that the face gives fingertip sensor pressure, drive pulling device corotation pulling driving rope, and then give the dactylotheca pulling force to the supplementary grip that provides, when the staff need be relieveed, nail face contact touch switch, touch switch transmission signal to control chip, the reversal of control chip cont