The final aim of our study is to construct the quantitative evaluation system of sensorimotor integration function of a hand during grip motion. Quantitative evaluation is demanded on rehabilitation facilities for early recovery. Sensorimotor integration function of a hand is necessary when a patient grips objects. We had designed the quantitative evaluation system of sensorimotor integration function during grip motion by using a flexible object. The evaluation system has two characteristics of "deformation-voltage" and "deformation-force". In this paper, we design and verify a new grip device to solve two problems in the conventional device. Firstly, the difficulty of grip in the conventional device was high, because the conventional device had complicated characteristic. Secondly, the spring characteristic of grip device cannot be changed easily. The result of verification shows that two technical problems in the new device are solved.
