Abstract: A damper mechanism includes an outer pipe and an inner member. The outer pipe has first inward convex portions, second inward convex portions, and concave grooves extending along the axial direction and alternately formed in the circumferential direction at the inner periphery thereof. Outward convex portions are formed in the circumferential direction at a plurality of portions on the outer periphery of the inner member. An elastic body is provided between the outer pipe and the inner member. The elastic body includes thick wall portions and thin wall portions. The thick wall portion is provided between one side face of the outward convex portion and the first inward convex portion. The thin wall portion is provided between the other side face of the outward convex portion and the second inward convex portion.

Abstract: A damper mechanism includes an outer pipe and an inner member. The outer pipe has first inward convex portions, second inward convex portions, and concave grooves extending along the axial direction and alternately formed in the circumferential direction at the inner periphery thereof. Outward convex portions are formed in the circumferential direction at a plurality of portions on the outer periphery of the inner member. An elastic body is provided between the outer pipe and the inner member. The elastic body includes thick wall portions and thin wall portions. The thick wall portion is provided between one side face of the outward convex portion and the first inward convex portion. The thin wall portion is provided between the other side face of the outward convex portion and the second inward convex portion.

Abstract: A heart pulse rate measuring system comprises a casing, a pair of rod-shaped grip sensors extending outwardly from the opposite sides of the casing for sensing a heart pulse signal, and an electric circuit for calculating a heart pulse rate from the sensed heart pulse signal. Each of the grip sensors is composed of two conductive cylindrical electrodes arranged in an axially aligned relationship and electrically insulated from each other for obtaining a pulse rate utilizing the potentials at four points in a user's body. The electric circuit includes a differential amplifier, having a ground connection to one of the two electrodes of each sensor and two inputs for the remaining electrodes. A filter is used to eliminate noise from the output of the differential amplifier, and a computer calculates the heart rate from the output of the filter.

Abstract: A small portable-type apparatus for checking pulse or heart rate of a person engaged in exercise. Therefore, the apparatus according to the present invention can be used as a pulsimeter or a cardiometer according to the state of a person in motion. The apparatus is provided with a heart sensor having a plurality of cone-shaped conductive rubber electrodes to differentially detect an electrocardiowave voltage signal generated from three different places near the heart and a pulse sensor having a matching infrared-ray emitting diode and infrared-ray receiving phototransistor to detect the light reflected from the blood flowing through capillary vessels under the finger pad. The apparatus additionally functions as a stopwatch or a timer as selected by a mode-selector switch.