Patent ID: 7374543

Claim:
A wrist sphygmomanometer formed in a curved shape to fit the semicircle on the side of the pulsation part of the wrist, comprising: a cuff spring having a mount portion outside; a cuff band including said cuff spring as a core, having an air bag disposed inside, and wound around the wrist; and a sphygmomanometer main body mounted on the mount portion of said cuff spring, comprising a pressure pump for supplying air to the air bag, wherein said cuff spring has a protrusion protruding inward formed at a nearly central position in the peripheral direction, said cuff spring has a slit formed at an arbitrary position in the axial direction so as to extend in a peripheral direction, and both sides of said slit in the axial direction of said cuff spring are formed having different curvatures with each other.