Patent ID: 7467551

Claim:
A device for measuring grip strength, comprising: a checking unit received in a base and having a shaft, a cable wrapped on the shaft and including a first end and a second end which is connected to a spring; a disk connected to an end of the shaft and including a plurality of protrusions extending radially outward from a periphery thereof and recesses defined between the protrusions; a detection member located beside the disk and the protrusions movable through the detection member; a transferring unit connected to the base and including a fixed part and an operation unit movably connected to the fixed part, a rod movable with the operation unit and connected to the first end of the cable, the shaft being rotated when the operation unit is pulled to lift the rod and the first end of the cable, the disk rotated with the shaft so as to rotate the disk the detection member detecting the protrusions passing therethrough to calculate a force applied to the operation unit, and a biasing unit 9 which returns the rod 8 .