JPH0631728B2 - Watches - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wristwatch capable of detecting a skin potential level and knowing an awake state.

[Prior art and its problems]

2. Description of the Related Art Conventionally, for example, there is a device in which a posture detection device such as a mercury contact is attached to a hair band to prevent a drowsy driving, and an alarm sound is generated when the posture is collapsed. However, according to this, there is a drawback that an alarm sound is generated when an object is picked up or when the user looks down at some time. Further, since the hair band is worn, the user feels uncomfortable and the hair is disturbed. [Purpose] The present invention provides a skin potential by providing electrodes on a part of the wrist watch band and the palm or palm. By detecting the level, it is possible to know the arousal state reliably and without feeling discomfort of electrode attachment,
Moreover, the present invention provides a wristwatch capable of accurately detecting drowsiness and waking up even if the skin potential level varies widely among individuals.

〔Example〕

First, the relationship between sleep and the skin potential level (hereinafter referred to as SPL) will be described. Recently, research on sleep has been positively promoted, and it has been found that SPL sensitively reacts to changes in arousal level such as during sleep periods. In particular, S on the palm surface or the palm surface relative to the wrist
As shown in Fig. 1, PL decreases sharply during the sleep period,
It is known that the level is low during sleep and high when awake.

The present invention detects an awake state from this SPL. In FIGS. 2 and 3, 1 is a skin potential level display unit, 2 is a time display unit, and 3 is a start switch for SPL measurement. Reference numeral 4 is a watch band, which can be attached to the arm by hook-and-loop fasteners 5 and 5. The first electrode 6 is provided at a position in contact with the inside of the wrist. Reference numeral 7 denotes a jack into which a plug 9 provided at the tip of the lead wire of the second electrode 8 attached to the tip of the little finger can be inserted when measuring SPL.

In FIG. 5, reference numeral 10 denotes an amplifier which receives the signals from the electrodes 6 and 8 and detects the SPL of the palm of the little finger with reference to the inside of the wrist. A display control circuit 11 samples the SPL every 10 seconds and displays the SPL for the past 10 minutes on the display unit 1. 12 is a comparison circuit,
The reference voltage Vr and SPL are compared, and an output is generated when SPL becomes equal to or lower than the reference voltage Vr. Reference numeral 13 is an alarm device, and 14 is a resistor for adjusting the alarm volume.

Next, the operation will be described. Normally, the plug 9 shown in FIG. 4 is used as a wristwatch with the electrode 8 removed and removed.

When it is necessary to prevent a drowsiness such as when driving a car or studying, the electrode 8 is attached to the tip of the little finger as shown in FIG.
Insert the jack into the jack 7 and press the start switch 3. By pressing the start switch 3, power is supplied to the circuit shown in FIG. The electrode 6 in FIG.
Is in contact with the palm of the little finger, the amplifier 10 of FIG.
From the above, the SPL of the palm part based on the wrist is detected and supplied to the display control circuit 11. This SPL is sampled every 10 seconds and displayed on the display unit 1. On the display unit 1, the reference voltage Vr is displayed as the reference line 1 in FIG.
Therefore, the user can objectively know his / her wakefulness. When SPL becomes equal to or lower than the reference voltage Vr, it is regarded as a sleeping state, an output is generated from the comparison circuit 12, and an alarm sound is generated from the alarm device 13.

Since the SPL varies from person to person, the reference voltage Vr can be appropriately set with the button 15.

FIG. 6 shows an example of supplying a voltage to the electrodes 6 and 8 to stimulate the skin instead of an alarm sound during the sleep onset period. 16 is a booster circuit that generates a voltage for skin stimulation, 18 is a switching circuit, and 19 is A switching circuit, 20 is a gate circuit, 21 is an inverter, and 22 is a flip-flop circuit.

In the above configuration, the switching circuit 19 generates a timing pulse having a constant cycle, and the amplifier 10 and the gate circuit 2
Select 0 alternately. Every time amplifier 10 is selected, S
PL is detected and compared with the reference voltage Vr in the comparison circuit 12. When SPL becomes lower than the reference voltage, the comparison circuit 1
The flip-flop circuit 22 is set by the output of 2 and the gate circuit 20 is opened. Therefore, by the timing pulse, the switching circuit 18 is turned on when the amplifier 10 is in the inoperative state, the output voltage of the booster circuit 16 is supplied to the electrodes 6 and 8, the skin is stimulated, and drowsiness is prevented.

Note that a lamp or the like may be caused to emit light as an alarm instead of the alarm sound or skin stimulation.

In the above example, the SPL of the palm of the little finger is detected,
Not limited to this, the SPL of the palm or the palm of another finger may be detected.

〔effect〕

According to the present invention, the electrode is provided on the portion of the watch band that contacts the inner side of the wrist, so that the skin potential level can be detected without the discomfort of wearing the electrode, and it does not hinder work, driving, or the like. Moreover, by adjusting the reference voltage, it is possible to accurately detect the dozing state from the skin potential level with large individual differences, and it is possible to wake up with an alarm.
It is possible to prevent snooze without malfunction.

Also, by displaying the skin potential level and the reference voltage,
The user can objectively know his / her wakefulness and can set the optimum reference voltage while confirming himself / herself.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the relationship between the awake state and the skin potential level, FIG. 2 is a front view showing an embodiment of the present invention, FIG. 3 is a right side view of FIG. 2, and FIG. 2 is a front view showing a state in which the wristwatch of FIG. 2 is worn, FIG. 5 is a block diagram showing an example of a circuit configuration, and FIG. 6 is a block diagram showing a circuit configuration of another embodiment. 1 ... Display unit 4 ... Band 6 ... First electrode 8 ... Second electrode 10 ... Amplifier 12 ... Comparison circuit 13 ... Alarm device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Susumu Ikuma 4-1-1 Taihei, Sumida-ku, Tokyo Inside Seikosha Co., Ltd. (56) Bibliography Sho-54-19775 (JP, U) Volume 8 P.4-6, June 30, 1981 Edited and published by Biofeedback Research Group Medical Electronics and Biotechnology, P. 327-P. 333 Volume 18 Issue 5 1980

Claims (2)

[Claims] 1. A first part of a watch band that contacts the inside of the wrist.
Is provided, a second electrode that comes into contact with the palm part or the palm part is provided, and a detection device that detects the skin potential level by the signals from the first electrode and the second electrode is provided. A comparison circuit is provided which compares the output signal with the reference voltage and produces an output when the output signal becomes equal to or lower than the reference voltage, and an alarm device which receives an output from the comparison circuit and issues an alarm is provided. A wrist watch having an adjusting device for adjusting. 2. A first part of the watch band that contacts the inside of the wrist.
Is provided, a second electrode that comes into contact with the palm part or the palm part is provided, and a detection device that detects the skin potential level by the signals from the first electrode and the second electrode is provided. A comparison circuit is provided which compares the output signal with the reference voltage and produces an output when the output signal becomes equal to or lower than the reference voltage, and an alarm device which receives an output from the comparison circuit and issues an alarm is provided. A wristwatch provided with an adjusting device for adjusting and a display device for displaying an output signal from the detecting device and the reference voltage.