BIO-SIGNAL MEASURING DEVICE
FIG5 is a schematic diagram showing a third example of the bio-signal and feed power distribution means
Next, as a third example of the bio-signal and feed power distribution means 300, in the case of AC power feed, as shown in FIG5, a low-pass filter 312 is used for the signal transfer circuit 310, and a high-pass filter 324 and a rectifying circuit 325 are used for the power transfer circuit 320.
schematic diagram
327
switching control means
310
signal transfer circuit
210
battery
325
rectifying circuit
100
bio-signal processing circuit
326
switching circuit
324
high-pass filter
320
power transfer circuit
312
low-pass filter
200
charging circuit
['1. A bio-signal measuring device comprising: a bio-signal measuring instrument which is used in a state of being mounted to a living body, wherein the bio-signal measuring instrument includes a battery as an internal power source and a charging circuit for the battery, a plurality of electrodes which are brought into contact with a skin surface of a human body at the time of bio-signal measurement and are connected to a predetermined power feeder at the time of charging of the battery, a bio-signal processing circuit which processes bio-signals detected at the electrodes in a predetermined manner, and bio-signal and feed power distribution means, the bio-signal processing circuit and the charging circuit are switchably connected to the electrodes through the bio-signal and feed power distribution means, at the time of the bio-signal measurement, the bio-signals detected at the electrodes are supplied to the bio-signal processing circuit through the bio-signal and feed power distribution means, and at the time of the charging of the battery, feed power which is supplied from the power feeder is supplied to the charging circuit through the bio-signal and feed power  distribution means.', '2. The bio-signal measuring device according to claim 1, wherein the bio-signal and feed power distribution means includes a signal transfer circuit and a power transfer circuit, the signal transfer circuit leads the bio-signal to the bio-signal processing circuit at the time of the bio-signal measurement and blocks a flow of the feed power to the bio-signal processing circuit at the time of the charging of the battery, and the power transfer circuit leads the feed power to the charging circuit at the time of the charging of the battery and blocks a flow of the bio-signal to the charging circuit at the time of the bio-signal measurement.', '4. The bio-signal measuring device according to claim 2, wherein in a case where the feed power which is supplied from the power feeder is an alternating current, a low-pass filter is used for the signal transfer circuit and a highpass filter and a rectifying circuit are used for the power transfer circuit.', '8. The bio-signal measuring device according to any one of claims 1 to 7, wherein a two-contact switching circuit having a first contact which connects the electrode to the bio-signal processing circuit and a second contact which connects the electrode to the charging circuit is used for the bio-signal and feed power distribution means, and the first contact side is closed at the time of the bio-signal measurement and the second contact side is closed at the time of the charging of the battery.']