Electrodes for measuring biosignals, biosignal measuring device, and biosignal measuring method

Abstract

To provide a technique to inhibit discomfort felt by a subject when an electrode for biological signal measurement is brought into contact with the subject's skin.SOLUTION: An electrode 50 for brain wave measurement (an electrode for biological signal measurement) which acquires a brain wave (a biological signal) by being brought into contact with a subject's head 99 (skin) comprises: projection parts 60 which project from a base 51; and electrode parts 80 provided at at least the tip portions of the projection parts 60 to acquire the brain wave. The projection parts 60 are configured of elastic members and a specific heat of the elastic members at 30°C is 1500 J / kg°C - 1900 J / kg°C.SELECTED DRAWING: Figure 4

Claims

1. A biosignal measuring electrode that is placed in contact with the skin of a subject to acquire biosignals, A protruding part that extends from the base, A conductive part provided at least at the tip portion of the protruding part for acquiring the biological signal, It has, The aforementioned protrusion is made of an elastic material, The specific heat of the elastic member at 30°C is 1500 J / kg°C or more and 1900 J / kg°C or less. The volume of each of the aforementioned protrusions is 0.3 mm ３ ~131mm ３ And, The aforementioned elastic member is made of silicone rubber, The aforementioned silicone rubber contains fillers, The filler comprises at least one of silica particles, alumina particles, and carbon black. An electrode for measuring biosignals, wherein the content of at least one of silica particles, alumina particles, and carbon black relative to the entire silicone rubber, or the total content of the sum thereof when multiple are included, is 20% by mass or more and 50% by mass or less.

2. The electrode for measuring biosignals according to claim 1, wherein the protruding portion has the shape of a cone or the tip of a cone removed.

3. The height of the aforementioned protrusion is 0.5 mm to 20 mm. The width of the bottom surface of the aforementioned protrusion is 2 mm to 5 mm. The electrode for measuring biosignals according to claim 1.

4. The electrode for measuring biosignals according to claim 1, wherein the base portion and the protruding portion are integrally formed.

5. The conductive portion is provided in an area extending at least 10% in the height direction from the tip portion of the protruding portion, as described in claim 1, for measuring biosignals.

6. The electrode for measuring biosignals according to claim 1, wherein the conductive portion is provided only at the tip of the protruding portion.

7. The conductive portion comprises a first conductive portion covering the tip of the protruding portion and a second conductive portion covering the surface of the base portion on which the protruding portion is provided, wherein the first conductive portion and the second conductive portion are connected, the electrode for measuring biosignals according to claim 1.

8. The electrode for measuring biosignals according to claim 7, wherein the first conductive portion is formed at the tip of the protruding portion by further providing a conductive material on top of a conductive material commonly provided on the base portion and the protruding portion.

9. The biosignal measuring electrode according to claim 7, wherein the conductive material constituting the first conductive part and the conductive material constituting the second conductive part are different.

10. The conductive part has a signal line that outputs the biological signal acquired by the conductive part to the outside, The electrode for measuring biosignals according to claim 7, wherein the signal line is connected to the second conductive part, passes through the inside of the base, and is output to the outside.

11. The electrode for measuring biosignals according to claim 1, wherein the elastic member includes a conductive material.

12. The biosignal measuring electrode according to claim 1, wherein the biosignal is an electroencephalogram.

13. A biosignal measuring device comprising an electrode for measuring biosignals as described in claim 1.

14. A method for measuring electroencephalograms by attaching the biosignal measuring device described in claim 13 to the head of a subject.

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