JPH0510807Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a blood flow detector, and in particular, it transmits light from one side of the finger to the other side.
The present invention relates to a blood flow detector that detects changes in the magnitude of absorption of the transmitted light by the finger.

[Prior art] Light is transmitted from one side of the fingertip to the other side, and the transmittance (reflectance) of this transmitted light is determined by the amount of blood flow in the finger.
There is a blood flow detector that measures biological information such as pulse and blood pressure by detecting changes in blood pressure, processing the signals, and calculating them.

FIG. 3 is a perspective view of a blood flow detector disclosed in Japanese Utility Model Application No. 60-15302. This is to bring a pair of light emitting/light receiving elements 4 into contact with the skin of the finger 6 and maintain that state. Two finger press plates 1 and 2 are connected by a shaft 3, a pair of light emitting/light receiving elements 4 is attached to one of the finger press plates 1 and 2, and a finger 6 is held between the fingers 6 by the force of a spring 5.

Figure 4A shows the second conventional example,
158803 is a perspective view of an optical sensor in which a light emitting element and a light receiving element are mounted on a flexible film substrate; FIG.

Ceramic fixing bases 11a and 12a are fixed onto a flexible film substrate 18, and a light emitting element 11 and a light receiving element 12 are mounted thereon.
The light emitting element 11 and the light receiving element 12 are connected to a lead wire 16, and the lead wire 16 is connected to the signal processing main body via a connector 17.

FIG. 4B is an explanatory diagram of the configuration of this optical sensor.
As shown in FIG. 4B, this optical sensor includes a light-emitting element 11 and a light-receiving element 12 arranged on a flexible film substrate 18 at a predetermined interval corresponding to the size of the finger 6. 11 and a light-receiving element 12, a transparent and flexible light-transmitting film 19 is attached to the film substrate 18.

This optical sensor is used in the manner shown in FIGS. 4C and 4D. FIG. 4C is a cross-sectional view taken along the line A-A in FIG. 4A, FIG. 4D is a cross-sectional view of the mounting, and FIG. 4E is a perspective view of the fixing tape. Fixed tape 20
is an example of Magic Tape (registered trademark),
A rectangular tape that has one side (female type or male type) of a removable adhesive consisting of a pair of members on the surface of one end of the tape, and the other side of the removable adhesive means on the back side of the other end of the tape. (female type or male type), and by overlapping one of the removable adhesive means on the other, the object to be fixed is fixed.

The optical sensor 21 is wrapped around the tip of the finger 6 so that the light emitting element 11 and the light receiving element 12 sandwich the tip of the finger 6 (FIG. 4C). Next, the fixing tape 20 shown in FIG. 4E is wrapped around the optical sensor 21 wrapped around the finger 6 to firmly fix the optical sensor 21 to the finger 6 (FIG. 4D).

The light emitting element 11 and the light receiving element 12 are connected to the lead wire 1
6, and the lead wire 16 is connected to the connector 1.
7 and is connected to the signal processing main body (not shown). When power is input, electricity flows through the lead wire 16 and the light emitting element 11 emits light (FIG. 4D).

The light generated by the emission passes through the finger 6 and irradiates the light receiving element 12 (FIG. 4D). Light receiving element 12
receives this light, and the lead wire 16 and connector 17
(FIG. 4D).
The signal processing unit detects the change in transmittance at this time, processes the signal, and then performs calculations to measure pulse rate, blood pressure, etc.

[Problems to be solved by the invention] The conventional blood flow detector is configured as described above. However, in the blood flow detector shown in Fig. 3, the finger 6 is simply held between the two finger press plates 1 and 2, so in the case of actual long-term measurement, the light-emitting element and light-receiving element may be misaligned. Moreover, the sensor often falls off from the finger 6, making accurate measurement difficult.

In the blood flow detector shown in FIGS. 4A to 4E,
Since the optical sensor is pasted with adhesive tape 20, the sensor will not fall off from the finger 6, but
There was a problem that accurate measurement was difficult because the pressure between the two sides was not reproducible and a predetermined pressure was not applied.

This invention was made to solve the above-mentioned problems, and it is an object of the present invention to provide a blood flow detector in which the sensor does not fall off from the finger and can apply a predetermined pressure.

[Means for Solving the Problems] The present invention provides a blood flow detector that transmits light from one side of a finger to the other side and detects a change in the amount of absorption of the transmitted light by the finger. It has the following parts.

(a) A biological optical sensor that is a strip-shaped device that includes a light-emitting element and a light-receiving element that are spaced apart in the longitudinal direction, and is curved at the tip of the finger and wrapped around the length of the finger.

(b) A tape that is applied over the biological optical sensor wrapped around the finger to fix the biological optical sensor to the finger.

(c) A holder that applies a predetermined pressure to the biological optical sensor and tape wrapped around the finger to hold the biological optical sensor on the finger with a constant pressure.

One side of the removable adhesive means consisting of a pair of members is provided on the back side of the surface of the tape to which the biological optical sensor is pasted, and when the finger is pinched, the removable adhesive of the holder The other of the removable adhesive means is provided at a portion that is touched by one of the means.

[Function] Since the tape is attached over the biological optical sensor wrapped around the finger to fix the biological optical sensor to the finger, the biological optical sensor is firmly fixed to the finger. In addition, one side of the removable adhesive means consisting of a pair of members is provided on the back side of the tape, and the other side of the removable adhesive means is provided on the holder. Fix firmly. Furthermore, since the holder pinches fingers or the like with a predetermined pressure, the pressure is reproducible and a predetermined pressure can be applied to the optical sensor or the like.

[Example] Hereinafter, an example of this invention will be described with reference to the drawings.

FIG. 1A constitutes the blood flow detector of this invention.
FIG. 1B is a plan view of a biological optical sensor attached to a tape, FIG. 1B is a back view thereof, and FIG. 1C is a sectional view taken along line CC in FIG. 1A.

In these figures, 30 is a biological optical sensor. The biological optical sensor 30 includes a light-emitting element 32 and a light-receiving element 33, which are spaced apart from each other in the longitudinal direction of a flexible film substrate 31. This optical sensor 30 is used by pasting it on the tape 34. The light emitting element 32 and the light receiving element 33 are each connected to a lead wire 35 and communicated with a signal processing main body (not shown) via a connector (not shown). Attached to the back side of the tape 34 is one side 36a (male or female part) of a pair of removable adhesive means, such as Magic Tape (registered trademark).

Next, the mounting method will be explained.

FIGS. 2A and 2B are schematic cross-sectional views showing the mounting method. The holder 37 is made up of two plates, one end of which is rotatably fixed to each other, and the other end is structured to hold the biological optical sensor and the finger 6 wrapped with tape. There is. The other side 36b (female part or male part) of Magic Tape (registered trademark), which is a removable adhesive means, is attached to each plate. The biological optical sensor 30 is wrapped around the tip of the finger 6 in the length direction so as to be curved, and then a tape 34 is pasted in the same direction over the tip of the finger 6.
is fixed. Light emitting element 32 and light receiving element 33
are facing each other with fingers 6 interposed therebetween. Place finger 6 etc. in holder 3
7, one side 36a (female or male part) of the magic tape attached to the holder 37 side is overlapped with the other side 36b (male or female part) of the magic tape attached to the optical sensor side (second B).
figure). In this way, the holder 37 firmly fixes the optical sensor or the like to the finger with a predetermined pressure. In addition, the light emitting element 30 and the light receiving element 33 will not shift or come out of the finger 6. As a result of this, reliable measurement data is obtained.

Incidentally, in the above-mentioned embodiment, a case has been described in which a magic tape is used as the removable adhesive means, but the invention is not limited to this.

[Effects of the invention] The blood flow detector according to the invention is configured as described above. Therefore, the light-emitting element and the light-receiving element will not shift or come off the finger. Moreover, the function of the holder allows the light-emitting element and the light-receiving element to be pressed against the finger with constant pressure. Therefore, there is an effect that accurate measurement values can be obtained.

[Brief explanation of drawings]

FIG. 1A is a plan view of the biological optical sensor attached to the tape, FIG. 1B is a back view of the tape, and FIG. 1C is a sectional view taken along line CC in FIG. 1A. FIGS. 2A and 2B are diagrams showing the method of attachment. FIG. 3 is a perspective view of a first conventional example of a blood flow detector. 4A and 4B are perspective views of a second conventional example of a blood flow detector. FIGS. 4C, 4D, and 4E are diagrams showing a method of attaching a second conventional blood flow detector to a finger. In the figure, 6 is a finger, 30 is a biological optical sensor, 3
1 is a flexible film substrate, 32 is a light emitting element,
33 is a light receiving element, 34 is a tape, 36a is a female or male part of the magic tape, 36b is a male or female part of the magic tape, and 37 is a holder. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) Transmitting light from one side of the finger to the other side;
In order to detect changes in the magnitude of absorption of this transmitted light by the finger, a band-shaped device is provided with a light-emitting element and a light-receiving element provided at intervals in the longitudinal direction, and is curved at the tip of the finger. , a biological optical sensor wrapped around the finger in the length direction; a tape pasted over the biological optical sensor wrapped around the finger to fix the biological optical sensor to the finger; and a tape attached to the biological optical sensor wrapped around the finger. a holder that applies a predetermined pressure to the optical sensor and the tape to hold the biological optical sensor on a finger with a constant pressure; a pair of members on the back side of the surface of the tape to which the biological optical sensor is attached; one of the removable adhesive means consisting of: the other of the removable adhesive means is provided at a portion of the holder that is touched by one of the removable adhesive means when the finger is pinched; flow detector. (2) The holder consists of two plates, one ends of which are rotatably fixed to each other,
The blood flow detector according to claim 1, which is a registered utility model and which holds the biological optical sensor and a finger wrapped with tape at the other end thereof.