Device for measuring rigidity of small spring

The utility model relates to a device for measuring the rigidity of a small spring. The device comprises a left vertical plate, a stretching meter, a left pressing plate, a positioning rod, a right pressing plate, a spring compression mechanism and a displacement sensor, the extensometer is fixed on the left vertical plate, a stretching joint of the extensometer is in threaded connection or welded fixation through the left side of the support frame, and the support frame is fixedly connected with the left pressing plate; the tested spring is sleeved on the positioning rod, the left end of the positioning rod is inserted into the through hole of the left pressing plate, and the right end of the positioning rod is connected with the right pressing plate; the displacement sensor is fixedly arranged on the right side of the right pressing plate; and the output ends of the extensometer and the displacement sensor are connected with the operational circuit. Compared with the prior art, the device has the advantages