Watch-typed heartbeat sensing device

• US 6,950,695 B2
• Filed: 07/30/2003
• Issued: 09/27/2005
• Est. Priority Date: 07/30/2003
• Status: Expired due to Fees

• Current Assignee: Yu-Yu Chen
• Original Assignee: Yu-Yu Chen
• Inventors: Chen, Yu-Yu
• Primary Examiner(s): Jastrzab, Jeffrey R.
• Application Number:
  US10/629,700
• Publication Number:
  US 20050027200A1
• Time in Patent Office: 790 Days
• Field of Search: 600/300, 600/502, 600/503, 600/509, 600/519, 600/520, 600/547, 968/886, 368/278, 368/281, 368/282, 368/283, 340/539.12, 128/903
• US Class Current: 600/509
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/02444 Details of sensor A61B5/02427 takes precedence
• CPC Class Codes: A61B 5/0245 by using sensing means generating electric signals, i.e. ECG signals
• CPC Class Codes: A61B 5/681 Wristwatch-type devices

Abstract

A watch-typed heartbeat sensing device includes a casing which defines a hollow space for the mounting of a circuit board provided with a plurality of contacts and a control circuit. The casing has two ends, a first end being mounted with a first pair of conductors which includes an inner plate and an outer plate, the two plates respectively connecting to a first and second contacts of the circuit board, a second end being mounted with a second pair of conductors which comprises an inner plate and an outer plate, the two plates respectively connecting to a third and fourth contacts of the circuit board. When a user puts on the heartbeat sensing device, the inner plates contacts wrist of the user, and when he puts his other hand on the heartbeat sensing device and touches the outer plates, two pairs of heartbeat signals are generated and transmitted to the circuit board, so that the heartbeat of the user is calculated and displayed.

Claims

1. A watch-typed heartbeat sensing device for detecting at least one heartbeat signal of a user, comprising:

a casing having an internal hollow space a first end, and a second end;

a watch band with two ends respectively connected to the first end and the second end of the casing;

a circuit board mounted in the hollow space of the casing, the circuit including a first contact, a second contact, a third contact, a fourth contact and a control circuit, the control circuit including;

a first pre-amplifier having a first input terminal connected to the first contact of the circuit board and a second input terminal connected to the third contact of the circuit board for generating a first differential signal at an output terminal thereof;

a second pre-amplifier having a first input terminal connected to the second contact of the circuit board and a second input terminal connected to the fourth contact of the circuit board for generating a second differential signal at an output terminal thereof;

a differential amplifier having first and second differential signal input terminals, the first differential signal input terminal being connected to the output terminal of the first pre-amplifier for receiving the first differential signal, the second differential signal input terminal being connected to the output terminal of the second pre-amplifier for receiving the second differential signal, the differential amplifier generating a differential output signal at an output terminal thereof based on the difference between the first differential signal and the second differential signal;

a microprocessor coupled the output terminal of the differential amplifier for receiving the differential output signal, the microprocessor calculating and then outputting a heartbeat signal; and

a display coupled to the microprocessor for receiving the heartbeat signal therefrom and displaying the heartbeat signal;

a first pair of conductors mounted at the first end of the casing, the first pair of conductors including an inner plate and an outer plate respectively electrically connected to the first contact and the second contact of the circuit board; and

a second pair of conductors mounted at the second end of the casing, the second pair of conductors including an inner plate and an outer plate and respectively electrically connected to the third contact and the fourth contact of the circuit board;

wherein when the casing is put on a wrist of one hand of the user by means of the watch band, the inner plate of the first pair of conductors and the inner plate of the second pair of conductors contact the wrist of the user, and when the user puts his other hand onto the casing of the heartbeat sensing device and contacts the outer plate of the first pair of conductors and the outer plate of the second pair of conductors, thereby two pairs of heartbeat signals are generated respectively at the first pair of conductors and the second pair of conductors and transmitted to the control circuit of the circuit board.

2. The watch-typed heartbeat sensing device as claimed in claim 1, wherein the control circuit further comprises a filter which is connected between the differential amplifier and the microprocessor for filtering the noise of the differential output signal received from the differential amplifier.

3. The watch-typed heartbeat sensing device as claimed in claim 2, wherein the control circuit further comprises a shaping circuit which is connected between the filter and the microprocessor for shaping the heartbeat signal received from the filter.

4. The watch-typed heartbeat sensing device as claimed in claim 1, wherein the inner plate and the outer plate of the first pair of conductors is integrally formed on a bottom surface and an upper surface of the watch band and adjacent to the first end of the casing.

5. The watch-typed heartbeat sensing device as claimed in claim 1, wherein the inner plate and the outer plate of the second pair of conductors is integrally farmed on a bottom surface and an upper surface of the watch band and adjacent to the second end of the casing.