JP2008119454A - In-bed temperature controlling apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus which enables a sufficient sleeping to be achieved in such a manner that the variation of a sleeping cycle during sleeping is detected to keep an optimal in-bed temperature in response to the sleeping cycle. <P>SOLUTION: This in-bed temperature controlling apparatus is constituted of a sleeping depth judging means 2, a temperature measuring means 3, a temperature regulating means 4, and a temperature controlling means 5. That is, a sleeping depth is judged from a detailed biomedical signal of a subject by the sleeping depth judging means 2. Also, a temperature in bed is measured by the temperature measuring means 3 consisting of a temperature sensor such as a thermistor. Temperature regulating sheets 7a and 7b are controlled by the temperature controlling means 5 in such a manner that the temperature in bed may be regulated to a proper temperature in response to the sleeping depth at the time of sleeping. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an in-bed temperature management apparatus that maintains a sleep environment so that a comfortable sleep can be realized by managing the in-bed temperature to an optimum temperature.

  The number of people with insomnia currently occupies about 20% of the people, and three shift workers account for 20% of workers. It is difficult to secure a comfortable sleep represented by a good sleep and deep sleep in a workplace where the work system such as three shifts is irregular or a workplace where late night work is forced. It is difficult to secure a comfortable sleep in many cases where mental stress is applied including these situations, and ensuring a comfortable and sufficient sleep is an important issue in modern times.

  As a method for obtaining a comfortable sleep, environmental temperature management at the time of going to bed has been attracting attention along with improvement of bedding such as pillows and beds. Needless to say, it is desirable to sleep in a temperature environment that is not too hot and not too cold to get a comfortable sleep, but keeping the entire room at the right temperature is an effective way to get a comfortable sleep. It is believed that.

  However, if the entire room is kept at a temperature suitable for sleeping, there is a problem that it takes a great deal of energy and cost to manage the room. Therefore, proposals have been made to obtain a comfortable sleep by keeping the temperature in the bed at a predetermined temperature.

  In the conventional methods of managing the temperature in the bed and ensuring a comfortable sleep, there are many examples in which the temperature in the bed is maintained at a certain level. Even when it is not constant, it is often controlled by using a timer such as slightly lowering the temperature at midnight, and these methods do not take into account changes in the body related to the sleep cycle during sleep, so you get a good night's sleep and deep sleep It's hard to say the best way to do it.

  As described above, the conventional method of controlling the temperature of the entire room has a problem that it takes a great deal of energy and cost for the management. In addition, the conventional method for managing the temperature in the bed is a method for obtaining a comfortable and sufficient sleep by keeping the inside of the bed at a predetermined temperature using a timer or the like. It's hard to say that it's the best way to get comfortable and adequate sleep because it doesn't take into account.

  In view of the above, the present invention provides a device that can achieve a comfortable and sufficient sleep by detecting a change in the sleep cycle during sleep and maintaining an optimal bed temperature corresponding to the sleep cycle. The purpose is to do.

  In order to achieve the above object, a temperature management device in the bed of the first solving means of the present invention includes a sleep depth determination unit that determines the sleep depth during sleep, a temperature measurement unit that measures the temperature in the bed, The temperature control means for adjusting the temperature in the bed and the temperature control means for controlling the temperature in the bed according to the sleep depth determined by the sleep depth determination means.

  According to said 1st solution means, the temperature management apparatus in the bed of this invention is equipped with the sleep depth determination means which determines sleep depth, and temperature control is carried out to the optimal bed temperature for the sleep depth obtained from the determination result. A comfortable and sufficient sleep can be obtained when the means is maintained using the temperature adjusting means.

  The second solving means of the present invention is the bed temperature management device of the first solving means, wherein the temperature control means manages the temperature within the bed corresponding to the sleep depth determined in advance. The sleep depth of the subject and the bed temperature at that time are measured in advance, and the temperature can be controlled based on the data to achieve sleep and deep sleep.

  The third solving means of the present invention is the bed temperature management apparatus of the first solving means, wherein the control means controls to lower the bed temperature when shifting to a deeper sleep depth. It is a feature, and it is possible to obtain a good sleep and deep sleep by setting the temperature in the bed suitable for different sleep depths.

  The fourth solving means of the present invention is the temperature management device in the bed of the first solving means, wherein the temperature control means increases the temperature when entering the bed and lowers the temperature when sleeping. Prompt sleep can be achieved.

  The fifth solving means of the present invention is the temperature management device in the bed of the first solving means, wherein the temperature control means increases the temperature in the bed when waking up and promotes awakening. And can wake up comfortably.

  The sixth solving means of the present invention is the temperature management device in the bed of the first solving means, wherein the sleep depth determining means detects a heartbeat signal from a subject using a heartbeat signal detecting means, and is detected. A heart rate intensity signal is calculated from the heart rate signal, a variance value of data within a predetermined time of the calculated heart rate intensity signal is calculated, and a sleep depth is determined from the value of the variance value.

  The seventh solving means of the present invention is the bed temperature management apparatus according to the sixth solving means, wherein the heartbeat signal detecting means detects a biological signal by means of a biological signal detecting means arranged under the body of the subject. It comprises a detected differential pressure sensor and a biological signal detecting means, and extracts a heartbeat signal from the detected biological signal.

  An eighth solving means of the present invention is the bed temperature management apparatus according to the seventh solving means, wherein the biological signal detecting means includes a slight differential pressure sensor and a biological signal detecting unit, A biological signal is detected by detecting a pressure change of the air accommodated in the inside using a slight differential pressure sensor.

  A ninth solving means of the present invention is the bed temperature management apparatus according to the sixth solving means, wherein the heartbeat signal detecting means is a sphygmomanometer or a sphygmomanometer worn on the wrist or upper arm. And

  A tenth solving means of the present invention is the bed temperature management apparatus of the first solving means, wherein the temperature adjusting means is a temperature adjusting sheet having heating and cooling functions.

  An eleventh solving means of the present invention is the bed temperature management apparatus according to the first solving means, wherein the temperature control sheet is formed with a passage through which air or liquid can circulate, and is formed in the passage. A temperature-controlled gas or liquid is circulated.

  A twelfth solving means of the present invention is the bed temperature management apparatus according to the first solving means, wherein the temperature adjusting means includes a blowing means for blowing the temperature-controlled air into the bed. .

  As described above, the temperature management device in the bed of the present invention is configured to determine the sleep depth of the subject in real time and adjust the temperature in the bed to an optimum temperature with respect to the obtained sleep depth determination value. Therefore, it is possible to realize the temperature management in the bed that can realize comfortable and sufficient sleep according to the transition of the sleep depth overnight.

  Therefore, unlike conventional bed temperature devices that maintain a constant temperature, it is configured to work in conjunction with the change in sleep depth, so that it is possible to maintain an optimal bed temperature for the bedridden and useless. It is possible to manage the temperature in the bed, which can realize comfortable and sufficient sleep without using energy.

BEST MODE FOR CARRYING OUT THE INVENTION

  The apparatus according to the first embodiment of the present invention will be described in detail with reference to FIGS. In addition, this invention is not limited by a present Example.

  FIG. 1 is an explanatory view for explaining the temperature control device in the bed according to the first embodiment of the present invention. As shown in FIG. 1, the in-bed temperature management device 1 includes a sleep depth determination unit 2, a temperature measurement unit 3, a temperature adjustment unit 4, and a temperature control unit 5.

  The biological signal detection unit 21 of the sleep depth determination unit 2 detects a minute biological signal of the subject without restraining the subject, extracts a heartbeat signal from the output signal, and determines the sleep depth from the variance value of the intensity of the heartbeat signal. To do. The step of determining the sleep depth will be described in detail later.

  The temperature measuring means 3 is a temperature sensor such as a thermistor. In this embodiment, the temperature measuring means 3 is provided near the head or the feet in the bed as shown in FIG. You may provide not only in said location but other site | parts vicinity. The output of the temperature measuring means 3 is input to a temperature control means 5 described later.

  The temperature adjusting means 4 is a device including a heat source or a cooling source for adjusting the temperature in the bed to an appropriate temperature according to the sleep depth during sleep, and the output controller 6 is controlled according to an instruction from the temperature control means 5. The temperature of the temperature control sheets 7a and 7b arranged on the bed 10 is adjusted. Although the bedding such as a futon is not shown in FIG. 1, the temperature of the temperature control sheets 7 a and 7 b is actually adjusted while the subject is covered with the bedding.

  FIG. 4 is an explanatory view showing details of the temperature adjusting means 4 and the temperature adjusting sheets 7a and 7b. Inside the temperature control sheets 7 a and 7 b, a passage through which air or liquid can circulate is provided, and the temperature control sheets 7 a and 7 b are connected to the pump 71. A temperature controller 72 for heating or cooling the gas or liquid delivered from the pump 71 is provided, and the temperature-adjusted sheet 7a, 7b is circulated through the temperature-adjusted gas or liquid in the passage of the temperature-adjusted sheet 7a, 7b. The temperature of 7b is kept at a predetermined temperature. Further, the output controller 6 adjusts the temperature adjustment sheets 7a and 7b so that each temperature is appropriate when the set temperatures are different.

  The temperature control unit 5 receives the output of the sleep depth value of the sleep depth determination unit 2 and performs control so that the bed temperature is optimal for the sleep depth stored in advance. That is, the difference between the current output of the temperature measuring means 3 and the target bed temperature is confirmed, and the bed temperature adjusting means 4 is operated so as to approach the target temperature. The temperature of the temperature control sheets 7a and 7b can be arbitrarily set by the output controller 6, and for example, it is possible to operate so that only one of the temperature control sheet 7a and the temperature control sheet 7b operates. . For example, in the seasons other than the summer, it is sufficient to operate only the temperature control sheet 7a provided on the legs, but in the summer, the cooling of the head is also effective for comfortable sleep. 6 can be used to operate the temperature control sheet 7b provided on the head.

  Next, the configuration of the sleep depth determination unit 2 and the method for determining the sleep depth will be described with reference to the configuration diagram of the sleep depth determination unit 2 in FIG.

  The biological signal detection means 21 is a detection means for detecting a minute biological signal of the subject without restraining the subject, and the biological signal detection means 21 so that the signal can be processed in a later processing step by the signal amplification shaping means 22. Amplifies the signal detected in step 1, and removes unnecessary signals such as respiration by a band-pass filter.

  The biological signal detection means 21 includes a pressure sensor 21a and a pressure detection tube 21b, and constitutes a biological signal detection means that does not restrain the subject. The pressure sensor 21a is a sensor that detects minute fluctuations in pressure. In this embodiment, a low-frequency condenser microphone type is used. However, the pressure sensor 21a is not limited to this, and has an appropriate resolution and dynamic range. If it is.

  The low-frequency condenser microphone used in this example is replaced with a general acoustic microphone that does not consider the low-frequency area. This is a significant improvement and is suitable for detecting minute pressure fluctuations in the pressure detection tube 21b. In addition, it is excellent for measuring minute differential pressure, has a resolution of 0.2 Pa and a dynamic range of about 50 Pa, and is several times the performance of a fine differential pressure sensor using a ceramic that is normally used. It is suitable for detecting a minute pressure applied to the pressure detection tube 21b through a biological signal through the body surface. The frequency characteristic shows an almost flat output value between 0.1 Hz and 20 Hz, and is suitable for detecting minute biological signals such as heartbeat and respiration rate.

  As the pressure detection tube 21b, a tube having an appropriate elasticity is used so that the internal pressure changes corresponding to the pressure fluctuation range of the biological signal. Further, in order to transmit the pressure change to the fine differential pressure sensor 21a at an appropriate response speed, it is necessary to appropriately select the volume of the hollow portion of the pressure detection tube 21b. When the pressure detection tube 21b cannot satisfy the appropriate elasticity and the volume of the hollow portion at the same time, the hollow portion of the pressure detection tube 21b is loaded with a core wire having an appropriate thickness over the entire length of the tube so that the volume of the hollow portion is appropriately set. Can take.

  The pressure detection tube 21b is disposed on a hard sheet 29a laid on the bed 6, and a cushion sheet 29b having elasticity is laid thereon, on which a subject lies. Note that the pressure detection tube 21b may have a structure in which the position of the pressure detection tube 21b is stabilized by being incorporated in the cushion sheet 29b or the like. Note that the bedding such as a futon is not shown here.

  In the present embodiment, two sets of biological signal detection means 21 are provided, one of which detects a biological signal of a part of the subject's chest and the other of which detects a part of the subject's buttocks, thereby Although it is configured to stably detect the biological signal regardless of the posture, the pressure detection tube 21a may be disposed only in one of the chest region and the buttocks region.

  The biological signal detected by the biological signal detection means 21 is a signal in which various vibrations emitted from a human body are mixed, and includes a heartbeat signal, a respiratory signal, a turnover signal, and the like. The biological signal detected by the biological signal detection means 21 is amplified by the signal amplification shaping means 22, and an appropriate signal shaping process is performed by further removing signals that are clearly abnormal levels.

  The output signal of the signal amplification and shaping means 22 includes various signals generated by the living body such as heartbeat, respiration, and body movement, and the heartbeat signal detection means 23 detects the heartbeat signal using a bandpass filter.

  The heart rate intensity signal is detected by the automatic gain control means 24 and the signal intensity calculation means 25. The automatic gain control means 24 is a so-called AGC circuit that automatically performs gain control so that the output of the heartbeat signal detection means 23 falls within a predetermined signal level range. The gain value (coefficient) at this time is used as the signal intensity. It outputs to the calculating means 25. For gain control, for example, the gain is set so that the amplitude of the output signal decreases when the peak value of the signal exceeds the upper threshold, and the gain is increased when the peak value falls below the lower threshold. is doing.

  The signal strength calculation means 25 calculates the signal strength from the gain control coefficient applied to the biological signal in the automatic gain control means 24. It is preferable to set a function indicating the signal strength so that the gain value obtained from the AGC circuit is set to be small when the signal size is large and to be large when the signal size is small.

  The heart rate intensity variance calculating means 26 is a means for calculating a variance value of the heart rate intensity signal as an index value for determining the sleep depth. In the heart rate intensity variance calculating means 26, the variance value (standard deviation) of the 60-second data of the heart rate obtained by the signal intensity calculating means 25 is calculated. The heart rate intensity data is measured every second, and the data for 60 seconds, that is, the variance value of 60 heart rate intensity data, is determined from that point. As a result, time-series data at intervals of 1 second of variation (dispersion value) in heart rate intensity is obtained. Here, the variance value indicates a so-called statistical variance, and a standard deviation may be used instead of the variance.

  The present inventor has confirmed that the variance value of the heart rate intensity obtained by the heart rate intensity variance calculating means 26 is highly correlated with the sympathetic nervous system component of the autonomic nervous system. The sleep state is managed by the autonomic nervous system. From this, it is clear that the dispersion value of the heart rate intensity is highly correlated with the sleep depth. As a result of experiments, it has been found that the deeper the sleep, the smaller the sympathetic nervous system component of the autonomic nervous system. Thus, by measuring the dispersion value of the heart rate intensity and the sleep depth at the same time, the relationship between the dispersion value of the heart rate intensity and the sleep depth can be obtained. That is, it is possible to know the dispersion value of the heart rate intensity corresponding to the break of each sleep depth by comparing the value of each sleep depth and the dispersion value of the heart rate intensity such as REM sleep, shallow non-REM sleep, deep non-REM sleep, etc. Therefore, the sleep depth is determined using this value. The sleep depth calculation means 27 determines the sleep depth at an appropriate time interval, for example, an interval of about 10 to 30 minutes.

  Measurement data such as sleep depth values and heart rate intensity data determined by the sleep depth calculation means 27 and determination data are output to the data storage / output means 28 to be displayed on a monitor device (not shown) or printed on a printing device.

  In the above-described embodiment, an example in which a hollow tube is used as the biological signal detection means has been described. However, the air mat shown in FIG. 3 can also be used as the detection means. Here, the biological signal detection means 9 has an air tube 9b connected to one end of an air mat 9a in which air is sealed, and is connected to a slight differential pressure sensor 9c. As the fine differential pressure sensor 9c, the same sensor as that described in the case of the biological signal detection means using the hollow tube shown in FIG. 2, that is, the fine differential pressure sensor 21a can be used.

  Next, operation | movement of the temperature control apparatus 1 in the bed of this invention is demonstrated. The sleep depth determination means 2 detects a biological signal including the heartbeat and breathing of the subject, calculates the intensity of the heartbeat signal extracted from the biological signal, and calculates the variance value of the 60-second data of the heartbeat signal intensity. Ask. The sleep depth is determined using the variance value of the heartbeat intensity signal as an index. The determination of the sleep depth is performed every second and is output to the temperature control means 5.

  The temperature control means 5 measures the optimal temperature in the bed corresponding to the sleep depth in advance for the subject and stores the data in the temperature control means 5. That is, for each user, the temperature at which the user according to each sleep depth feels that a comfortable sleep has been obtained is measured and stored in the temperature control means 5. Or it is good also as a structure which can set the management temperature in each sleep depth and can select temperature by a user.

  The temperature control means 5 outputs an instruction to the temperature adjustment means 4 using the optimum temperature corresponding to the sleep depth detected by the sleep depth determination means 2 as a target value for temperature control. The temperature control means 5 operates the temperature adjustment means 4 while confirming the output of the temperature detection means 3 until it matches the target value for temperature control.

  Next, the relationship between the sleep depth obtained by the sleep depth determination means 2 and the operation of the temperature control means 5 will be described. There are two types of sleep: REM sleep in a semi-wake state and non-REM sleep stage in deep sleep state. Non-REM sleep also has a division from the first stage to the fourth stage, and the sleep depth is changed from the first stage to the fourth stage. Deepen. Overnight sleep is a REM sleep state after falling asleep, followed by a sleep cycle of about 90 cycles of non-REM sleep from the first stage to the fourth stage and then becoming a deep REM sleep state and then becoming a REM sleep state again. Appears in a minute cycle. The sleep depth determination means 2 determines the sleep depth of this sleep cycle and sends the information to the temperature control means 5, and the temperature control means 5 performs temperature control that provides the optimal bed temperature at the sleep depth of the subject. There are three types of temperature control during sleep, sleep, and awakening.

  At the time of falling asleep, the temperature control means 5 performs temperature control in which the temperature in the bed is raised above the body temperature for a certain time and the temperature is gradually lowered. It is known that when the subject's deep body temperature falls, it becomes easier to fall asleep, and the temperature control means 5 raises the bed's internal temperature to raise the subject's deep body temperature, and then gradually lowers the bed's temperature. In this way, the temperature in the bed is controlled to promote the sleep of the subject. At the time when the sleep depth determination means 2 determines that the sleep state is entered, the temperature control means 5 ends the control at the time of falling asleep.

  The deep body temperature of the subject who is in a sleep state changes according to the sleep depth. Deep body temperature decreases during deep sleep, and deep body temperature increases when sleep becomes shallow. The bed temperature rises due to the effect of heat released outside the body when the deep body temperature decreases as the subject's sleep deepens. In addition, body movement such as turning over is lost during deep sleep, and heat tends to be accumulated in the bed, and the temperature in the bed tends to rise rapidly. As a result, since the release of heat from the body surface of the subject stops, the deep body temperature does not decrease and the depth of sleep is prevented from deepening, often resulting in a transition to a shallow sleep depth and arousal. The temperature control means 5 makes it possible to maintain the optimal deep body temperature corresponding to the sleep depth of the subject by controlling the temperature in the bed gradually to decrease as the sleep depth increases.

  A comfortable awakening is essential when waking up, and for that purpose, temperature control is required to awaken by raising the body temperature. In addition, if it occurs abruptly after deep sleep, an unpleasant feeling remains at the time of awakening, so it is desirable to gradually awaken from a deep sleep depth to a shallow sleep depth. Therefore, the temperature control means 5 performs control to gradually increase the temperature in the bed when the scheduled wake-up time approaches. As a result, the deep body temperature of the subject gradually rises and the sleep depth becomes shallow, so that the subject can be easily and comfortably awakened by stimulation such as indoor lighting or outside light or sound (alarm).

  When the season is summer, it is known that cooling the head can provide a comfortable sleep. For this reason, it is desirable to drive so as to send cool air to the temperature control sheet 7b of the head. Therefore, it is preferable to switch the output controller 6 so that cold air reaches the head. In this case, the cold air is supplied to both the temperature control sheet 7a disposed at the head and leg portions and the temperature control sheet 7b disposed at the head.

  The temperature control sheets 7a and 7b in the above-described embodiments are controlled so as to reach a predetermined temperature by passing the temperature-controlled air or liquid through the temperature control sheets 7a and 7b. Alternatively, for example, a temperature control may be performed by incorporating a Peltier element into the temperature control sheets 7a and 7b. In that case, the temperature control means 5 and the output controller 6 play a role of controlling the value of the current flowing through the Peltier element.

  In the second embodiment of the present invention, as shown in FIG. 5, the in-bed temperature management apparatus 1 includes a sleep depth determination means 2, a temperature measurement means 3, a temperature adjustment means 8, and a temperature control means 5.

  As shown in FIG. 5, the temperature adjusting means 8 of the second embodiment is composed of a blower 81 and a temperature adjuster 82, and an outlet 83 of the blower 81 is disposed in the bedding 10a. In FIG. 5, the ejection port 83 is configured to blow air into the bedding 10 a at two locations of the foot portion and the head portion, but may be configured to be provided only in one of them. The temperature adjusting means 8 is connected to the temperature control means 5, adjusts the temperature of the air blown by the temperature adjuster 82 in accordance with the instructions of the temperature control means 5, and the bed is made by the air sent from the outlet 83 into the bed. Adjust the temperature inside.

  The configuration and operation of the sleep depth determination means 2 are the same as those in the first embodiment, and detailed description thereof is omitted. The sleep depth determination means 2 detects a biological signal including the heartbeat and breathing of the subject, calculates the intensity of the heartbeat signal extracted from the biological signal, and calculates the variance value of the 60-second data of the heartbeat signal intensity. The sleep depth is determined using the variance value of the heart rate intensity signal as an index. The determination of the sleep depth is performed every second and is output to the temperature control means 5.

  The temperature value determined according to the sleep depth determination means 2 is output to the temperature control means 5, and the temperature control means 5 outputs the set temperature in the bed to the temperature adjustment means 8. The air whose temperature is adjusted at 82 is sent out from the outlet 83 into the bed. Air blowing is performed until the temperature in the bed measured by the temperature measuring means 3 matches the indicated value of the temperature control means 5. As a result, since the temperature in the bed is maintained at an optimum temperature corresponding to the sleep depth, it is possible to obtain a sleep or a deep sleep.

  The in-bed temperature management apparatus 1 according to the third embodiment of the present invention includes a sleep depth determination unit 2, a temperature measurement unit 3, temperature adjustment units 4 and 8, and a temperature control unit 5. In other words, the temperature adjusting sheets 7a and 7b of the temperature adjusting means 4 and the blower 81 to the bed of the temperature adjusting means 8 are both provided.

  A passage through which air or liquid can circulate is formed inside the temperature adjustment sheet 7a, 7b of the temperature adjustment means 4, and the temperature-adjusted gas or liquid is circulated in the passage of the temperature adjustment sheet 7a, 7b. Thus, the temperature of the temperature control sheets 7a and 7b is kept at a predetermined temperature.

  The temperature control sheets 7a and 7b are less affected by the indoor air temperature and can maintain a stable temperature. However, the temperature in the bed may change abruptly due to movement of the bedding 10a hung on the subject. is there. The temperature adjusting means 4 provided with the temperature adjusting sheets 7a and 7b has a problem that it is difficult to change the temperature suddenly and cannot cope with the rapid temperature change in the bed.

  The temperature adjusting means 8 is a temperature adjusting means that directly jets temperature-adjusted air into the bed, so that the temperature-adjusted air is rapidly sent into the bed from the outlet 83 of the blower 81. By doing so, it becomes possible to quickly return the temperature in the bed to the set temperature of the temperature control means 5.

  In the description of the above-described embodiment, a biological signal is detected from vibration of an air tube or an air mat laid under the user's body as a heartbeat signal detecting means for detecting a sleep depth, and the heartbeat signal is detected from the biological signal. Although the detecting means is used, it may be a pulse meter or a sphygmomanometer attached to the wrist or the upper arm, and a type of outputting data every moment. The output signal can be handled as signal data equivalent to the heartbeat signal.

  The conventional method of controlling the temperature of the entire room has a problem that it takes a great deal of energy and cost for the management. In addition, in the conventional method for managing the temperature in the bed, a method using a timer or the like is not the best method for obtaining a good sleep and deep sleep because the sleep cycle during sleep is not taken into consideration.

  In view of the above, the present invention provides an apparatus that can achieve sleep and deep sleep by detecting a change in the sleep cycle during sleep and maintaining an optimal bed temperature corresponding to the sleep cycle. It is possible to live a healthy life physically and mentally by obtaining a comfortable sleep. In addition, there is an advantage that less energy is used compared to the method of heating the entire room. In view of the above, there are significant effects on society in terms of health management and energy saving.

  It is explanatory drawing which shows the structure of the temperature control apparatus in the bed of a 1st Example.   It is explanatory drawing which shows the structure of a sleep depth determination means.   It is a block diagram which shows another biological signal detection means.   It is explanatory drawing which shows the detail of a temperature control means.   It is explanatory drawing which shows the structure of the temperature management apparatus in the bed of a 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bed temperature control apparatus 2 Sleep depth determination means 3 Temperature measurement means 4 Temperature adjustment means 5 Temperature control means 6 Output controller 7a, 7b Temperature adjustment sheet 8 Temperature adjustment means 9 Biosignal detection means 9a Air mat 9b Air tube 9c Slight difference Pressure sensor 10 Bed 10a Bedding 21 Biological signal detection means 21a Slight differential pressure sensor 21b Pressure detection tube 22 Signal amplification shaping means 23 Heart rate signal detection means 24 Automatic gain control (AGC) means 25 Signal intensity calculation means 26 Heart rate intensity dispersion calculation means 27 Sleep depth calculation means 28 Data storage / output means 29a Hard sheet 29b Cushion seat 71 Pump 72 Temperature controller 81 Blower 82 Temperature controller 83 Spout

Claims (12)

A sleep depth determination means for determining a sleep depth while sleeping;
Temperature measuring means for measuring the temperature in the bed,
Temperature adjusting means for adjusting the temperature in the bed,
A bed temperature management apparatus comprising temperature control means for controlling the bed temperature according to the sleep depth determined by the sleep depth determination means.   The in-bed temperature management apparatus according to claim 1, wherein the temperature control means manages the temperature in the bed corresponding to the sleep depth determined in advance.   The in-bed temperature management apparatus according to claim 1, wherein the control unit performs control so as to lower the in-bed temperature when shifting to a deeper sleep depth.   2. The temperature control device in a bed according to claim 1, wherein the temperature control means increases the temperature in the bed when entering the bed, and decreases the temperature in the bed during sleep.   2. The bed temperature management apparatus according to claim 1, wherein the temperature control means promotes awakening by raising the temperature in the bed when waking up.   The sleep depth determination means detects a heartbeat signal from a subject using a heartbeat signal detection means, calculates a heartbeat intensity signal from the detected heartbeat signal, and calculates a variance value of data within a predetermined time of the calculated heartbeat intensity signal. The in-bed temperature management device according to claim 1, wherein the sleep depth is calculated and the sleep depth is determined from the dispersion value.   The heartbeat signal detecting means detects a biological signal by means of a biological signal detecting means arranged under the body of the subject, and includes a detected differential pressure sensor and a biological signal detecting means, and the heartbeat signal is detected from the detected biological signal. The temperature management device in a bed according to claim 6, wherein the temperature is extracted.   The biological signal detection means includes a fine differential pressure sensor and a biological signal detection unit, and detects a biological signal by detecting a change in pressure of air stored in the biological signal detection unit with the fine differential pressure sensor. The in-bed temperature management device according to claim 7.   The in-bed temperature management apparatus according to claim 6, wherein the heartbeat signal detecting means is a pulse meter or a blood pressure monitor attached to a wrist or an upper arm.   The in-bed temperature management apparatus according to claim 1, wherein the temperature adjusting means is a temperature adjusting sheet having heating and cooling functions.   The temperature control sheet according to claim 10, wherein the temperature control sheet is formed by providing a passage through which air or liquid can circulate, and circulates the temperature-controlled gas or liquid in the passage. apparatus.   The in-bed temperature management apparatus according to claim 1, wherein the temperature adjusting unit includes a blowing unit that blows the temperature-controlled air into the bed.

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