JPS6143057B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Exercises such as marathon running are extremely effective for improving physical fitness, but excessive exercise is dangerous and may even be fatal. In order to prevent this danger, it is effective to constantly monitor the pulse. However, conventional pulse meters are not only expensive, but also large and complicated to operate, making it difficult to easily monitor pulses during exercise. Also, to measure pulse rate,
A light source and a photoelectric element are used to detect pulse waves from a fingertip, an earlobe, a radial artery, etc., but detection using an earlobe is the least affected by body movement. Therefore, the present invention detects the pulse wave of the earlobe and applies a signal with a pitch or frequency corresponding to the pulsation period to the earphone, so that the pulse wave can be constantly monitored by the person himself/herself during exercise without the need for an indicator or the like. The purpose of the present invention is to provide a simple, lightweight, small-sized, and inexpensive pulse meter that can monitor the pulse rate. When performing an exercise such as a marathon, the earphone input signal is intermittent at a desired cycle to indicate the running pace, and the pulse monitor wearer can adjust the pace by matching the exercise cycle, that is, the pace, to the intermittent sound. Regulation and pulse monitoring can be performed by the same device.

FIG. 1 is a diagram showing a state in which a pulse meter according to an embodiment of the present invention is attached while running, in which a pulse wave detector 1 consisting of a light source and a photoelectric element and an earphone 2 are attached to an ear loop and suspended around the ear. , these are connected by lead wires 4 to a main body 3 attached to the waist. Figure 2,
FIG. 3 is a side view and a front view of the above-mentioned detector 1, earphone 2, and ear ring 5. The ear ring 5 is made by bending a hollow metal or synthetic resin tube into a substantially C-shape as shown in the figure. A lead wire is passed through the hollow part, and the lead wire of the earphone 2 is drawn out from one end, and the detector 1 is attached to the other end. As shown in the cross-sectional view in FIG. 4, the pulse wave detector 1 includes a light source 6 such as a photodiode and a photoelectric element 7 such as a photoconductor.
are attached to both ends of a C-shaped spring 8 so that they face each other, and the light source and photoelectric element are each surrounded by a light shielding pad 9. That is, the ear loop 5 is placed on the earlobe 1 as shown in FIG.
0, the earphone 2 is inserted into the ear canal, and the light source 6 and photoelectric element 7 are inserted into the lower part of the earlobe for use.

5 is a front view of the main body 3, and FIG. 6 is a diagram showing the configuration of its signal processing circuit. When the light source 6 is turned on by the power battery housed in the main body, the light source passes through the earlobe 10. enters the photoelectric element 7, and the element outputs a signal having a pulsation component corresponding to the pulse wave as shown in FIG. 7a. The output is amplified by the band amplifier 11 in FIG. 6 to become a nearly sinusoidal wave with the same frequency p as the pulse wave as shown in FIG. is converted into a rectangular wave having an amplitude v and a constant time width w. Since this output is applied to the low frequency converter 13, a substantially smooth DC output having a level q proportional to the frequency p is sent out, as shown in FIG. 7d, and flows to the resistor 14 and ammeter 15. Therefore, the ammeter 15 can indicate the pulse rate per minute.

Moreover, the output of FIG. 7d is from comparators 16, 17, 18
The output voltages of the potentiometers 19, 20, and 21 are compared with each other. The above potentiometer is connected to a positive power supply voltage from terminal 22,
Each comparator provides an output signal when the output d is greater than the output of the potentiometer. Furthermore, resistors 23, 24, and 25 are connected in series to the power supply terminal 22, and the voltage of the resistor 25 controls a voltage-controlled variable frequency oscillator 26, and a switch circuit 2 is connected in parallel with the resistor 24.
7 is connected, and a switch circuit 28 is connected in parallel with the series circuit of resistors 23 and 24.
The above switch circuits are respectively closed at the outputs of 6 and 17. That is, when the switch circuits 27 and 28 are both open, the lowest voltage is applied to the oscillator 26, so for example, the seventh
As shown in Figure e, a very low audio frequency output is sent out. However, when the switch circuit 27 is closed, the control voltage is increased and the output frequency of the oscillator 26 is increased, and when the switch circuit 28 is closed, the frequency is further increased. Switch circuit 29, 30
The output of the oscillator 26 is applied to the earphone 2 through the parallel circuit and the volume controller 31, and the output of the comparator 18 closes the switch circuit 29, and sends out a low frequency signal as shown in FIG. The switch circuit 30 is controlled by the output of the oscillator 32. Therefore, the switch circuit 27,2
When both circuits 8 and 29 are open, the output e of the oscillator 26 is interrupted by the output of the oscillator 32, and a signal as shown in Figure 8g is applied to the earphone 2, and when the switch circuit 27 is closed, this The 8th traffic light
It is converted as shown in Figure _g1 , and when the switch circuit 28 is further closed, it becomes as shown in Figure _g2 . And switch circuit 2
When 9 is also closed, a continuous signal as shown in Fig. _8g3 is applied to the earphone.

Therefore, the comparator 16 outputs an output at the lower limit of the normal pulse rate, and the comparator 17 outputs an output at the upper limit, and when the pulse rate increases further and reaches a dangerous state, the comparator 18 also outputs an output. If the potentiometers 19, 20, and 21 are set so as to send out the sound, under normal conditions, you can run while listening to the intermittent sound of the regular pitch through the earphone ₂ as shown in Figure 8g1. can. That is, by adjusting the oscillator 32 so that the frequency shown in FIG. 8 matches the desired running pace, the user can easily run at a constant speed by matching the pace to the above-mentioned intermittent sound. Moreover, if the pulse rate abnormally decreases, the output of the comparator 16 disappears and the switch circuit 27 is opened, so that the pitch decreases as shown in FIG. circuit 2
7 and 28 close and the pitch rises like g ₂ . Furthermore, when the pulse rate increases to a dangerous level, the switch circuit 29 is also closed, resulting in a continuous sound as shown in Figure _8g3 , which can be easily distinguished.
Note that the voltage of the power supply terminal 22 causes the switch circuits 27, 2
a changeover switch 33 for closing 8, 29;
34 and 35 are provided, it is possible to confirm the sound in advance by generating signals such as g, g ₁ , g ₂ and g ₃ in Fig. 8 by operating these switches. can. Furthermore, when the ammeter 15 is omitted, the main body 3 can be made extremely small and lightweight, so that it can also be attached to the ear ring 5 described above.

As described above with respect to the embodiments, the present invention is such that a pulse detector is attached to the earlobe and a sound corresponding to the detected pulse rate is heard through earphones. For this reason, by attaching the detector and earphones to your ears, you can run a marathon or perform other exercises while monitoring your pulse.If an abnormality is detected, appropriate measures can be taken immediately, thereby reducing the risk of exercise. can be extremely effectively prevented. Moreover, since it is worn on the ear and the sound is heard by the ear, it is possible to perform various exercises without any trouble, and if necessary, it can be used to adjust the pace of running or other exercises by constantly generating intermittent sounds. .

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a state in which a pulse meter according to an embodiment of the present invention is attached and running, FIG. 2 is a side view of a part of the pulse meter shown in FIG. 1, and FIG. 3 is a front view of the pulse meter shown in FIG.
Fig. 4 is a cross-sectional view of the detector attached to the earlobe, Fig. 5 is a front view of the main body of the pulse meter in Fig. 1, and Fig. 6 is a diagram showing the configuration of the signal processing circuit in the embodiment of the present invention. , FIG. 7, and FIG. 8 are waveform diagrams illustrating the operation of the signal processing circuit of FIG. 6.
In the figure, 1 is a pulse wave detector, 2 is an earphone, 3 is a main body, 4 is a lead wire, 5 is an ear ring, 6 is a light source, 7 is a photoelectric element, 8 is a spring, 9 is a light shielding pad, and 10 is a It's an earlobe.

Claims (1)

[Claims] 1. A light source, a photoelectric element, and an earphone, which are arranged opposite to each other on both sides of the earlobe, are attached to one ear ring, and the photoelectric element is generated by light transmitted from the light source through the earlobe and incident on the photoelectric element. A pulse meter comprising: a signal processing circuit that sends out an audio frequency signal having a pitch corresponding to the pulsation period of the output sent out from the element; and the output of the signal processing circuit is added to the earphone.