Patent ID: 6982930
Filing Date: 2006-01-03
Classification: A61B,G04G

Abstract:
1. A wristwatch with the function of sensing heart pulses comprising: a) a watch housing made of nonconductive material, the watch housing having a crystal at the front side thereof; b) a liquid crystal display positioned under the crystal of the watch housing; c) a voltage sensor for detecting the voltage frequency change created by blood circulation within a human body, the voltage sensor having a plurality of components disposed on a circuit board under the liquid crystal display; d) a bottom cover made of conductive material and positioned at the bottom side of the watch housing, at least a conducting connection element being interposed between the bottom cover and the circuit board for creating an electric connection such that the bottom cover serves as a first electric terminal in close contact with the wrist of a first hand of a watch wearer; e) a wristband made of nonconductive material and attached to both ends of the watch housing; f) two conductive rubber strips positioned at the top of the wristband, the conductive rubber strips each having a conducting pin at both ends of the watch housing for creating an electric connection between the conductive rubber strips and the circuit board of the voltage sensor such that the conductive rubber strips serves as a second electric terminal to permit the contact with two fingers of a second hand of the watch wearer; and g) three inductors disposed within the voltage sensor, the inductors being coupled with both conductive rubber strips of the second electric terminal and the bottom cover of the first electric terminal so that the detected voltage change frequency undergoes a static electric filtration by means of the inductors and is transmitted to a filter shaping circuit for creating signals that are brought into a central processing unit with an internal or an external amplifying circuit and then amplified by the amplifying circuit for central processing unit to perform the processing and the calculating actions thereof whereby the processed result of the heart pulse rate in beats per minute can be presented on the liquid crystal display.