Patent ID: 8292821

Claim:
A wrist sphygmomanometer comprising: a cuff spring formed in a curved shape to fit the semicircle on the side of the pulsation part of the wrist, and having a mount portion outside; a cuff band including the cuff spring as a core, having an air bag disposed inside, and adapted to be wound around the wrist; and a sphygmomanometer main body mounted on the mount portion of the cuff spring, comprising a pressure pump for supplying air to the air bag, wherein the cuff spring further comprises a protrusion, wherein the protrusion protrudes inward at a nearly central position in a peripheral direction, and is adapted to be positioned between each of the two arteries passing through the pulsation part of the wrist when air is supplied to the air bag, wherein the cuff spring further comprises a reinforcing rib formed integrally with the protrusion to reinforce the protrusion.