Heartbeat rate indicator
First Claim
1. A heartbeat rate indicator comprising:
- a depressible detection electrode;
an amplifier connected to receive and amplify a signal from said detection electrode;
a filter connected to said amplifier for passing part of the amplified signal output from said amplifier;
an operation processing circuit connected to receive the filtered output signal from said filter for determining a heartbeat number;
display means for indicating the heartbeat number; and
switch means having a normally closed state for electrically connecting said detection electrode and one voltage potential of a power source to effect grounding of the detection electrode and being switchable to an open state upon depression of said detection electrode to effect measurement of the heartbeat.
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Accused Products
Abstract
A heartbeat rate indicator has a detection electrode on the surface of the housing such as a wristwatch case and the element of a circuit-input portion in which the existence of a switch connected to the detection electrode prevents the element from destroying with electrostatic charge produced at the moment of touching the detection electrode with the human body, the clothes or the like.
Because in the non-depression state of the detection electrode, the detection electrode is connected elastically through the switch to one terminal of a power source so that the electrostatic charge produced at the moment of touching the detection electrode with the human body discharges to the one terminal of the power source.
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Citations
9 Claims
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1. A heartbeat rate indicator comprising:
- a depressible detection electrode;
an amplifier connected to receive and amplify a signal from said detection electrode;
a filter connected to said amplifier for passing part of the amplified signal output from said amplifier;
an operation processing circuit connected to receive the filtered output signal from said filter for determining a heartbeat number;
display means for indicating the heartbeat number; and
switch means having a normally closed state for electrically connecting said detection electrode and one voltage potential of a power source to effect grounding of the detection electrode and being switchable to an open state upon depression of said detection electrode to effect measurement of the heartbeat. - View Dependent Claims (2)
- a depressible detection electrode;
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3. A heartbeat rate indicator comprising:
- a depressible detection electrode for detecting a cardio-electric potential signal;
circuit means having an operation processing means for determining a heartbeat number from the detected signal and display means for indicating said heartbeat number;
an electrically insulating member;
a lead member disposed on the surface of said insulating member and connected to one voltage potential of a power source;
a contact portion connected electrically to said detection electrode and being movable therewith; and
elastic means connected to said circuit means for electrically connecting said contact portion to said lead member when said detection electrode is not depressed to effect grounding of the detection electrode and for electrically disconnecting said contact portion from said lead member when said detection electrode is depressed to effect measurement of the heartbeat.
- a depressible detection electrode for detecting a cardio-electric potential signal;
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4. A heartbeat rate indicator for measuring and displaying the heartbeat rate of a person comprising:
- a detection electrode for detecting cardio-electric potential signals indicative of heartbeat rate from the skin surface of a person during use of the heartbeat rate indicator;
circuit means receptive of the cardio-electric potential signals for determining therefrom the heartbeat rate and for displaying information corresponding to the determined heartbeat rate; and
means coacting with the detection electrode for effecting the discharge of electrostatic charge accumulated on the person'"'"'s body prior to detection of the cardio-electric potential signals, the means coacting with the detection electrode comprising means for flowing the accumulated electrostatic charge in by-pass relationship with respect to the circuit means. - View Dependent Claims (5, 6, 7, 8, 9)
- a detection electrode for detecting cardio-electric potential signals indicative of heartbeat rate from the skin surface of a person during use of the heartbeat rate indicator;
Specification