JP2000320849A - Body warmer - Google Patents

Abstract

(57) [Problem] With this kind of conventional warming device, it takes time and effort to dispose a piezoelectric film on a heat insulating material, and a position where a heating element and a piezoelectric sensor are initially disposed during crimping by a hot press. There is a problem that the accuracy of the human body detection is reduced due to being fixed. SOLUTION: A sheet-shaped heat conducting means 13 provided with a human body detecting means 12 is used, and it takes time and effort to dispose a piezoelectric sensor as in the related art, or a positional shift occurs when fixing. It is possible to provide a warming tool that can be fixed easily without any trouble.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric carpet, an electric blanket, an electric cushion, a floor heater and the like.

[0002]

2. Description of the Related Art A conventional warming device is disclosed in Japanese Unexamined Utility Model Publication No. 2-98484.
In general, as shown in FIG. 17, a heating element 2 such as a cord-shaped tubing heater and a polyvinylidene fluoride (PVDF) are provided on a fibrous heat insulating material 1 such as a needle punch felt as shown in FIG. ), A film-shaped piezoelectric sensor 3 for detecting a human body is uniformly disposed, and a heat-sealing sheet 4 and a surface cloth 5 such as a non-woven fabric are disposed thereon, and the heat-sealing sheet 4 is melted by hot pressing. The heat insulator 2 and the piezoelectric film 3 are fixed by pressing the heat insulating material 1 and the surface cloth 5 while the body 6 is formed. Reference numeral 7 denotes a control unit that controls energization of the heating element 2. Note that the heat bonding sheet 4 may be formed by laminating an aluminum soaking plate 8.

[0003]

However, in the above-described conventional method of fixing a warming tool, it takes time and effort to dispose the piezoelectric film 3 on the heat insulating material 1, and the heating element 2 is pressed during hot pressing. In addition, the heating element 2 and the piezoelectric sensor 3 are not uniformly arranged because the piezoelectric sensor 3 is fixed at a position shifted from the position where the piezoelectric sensor 3 was initially arranged, and the accuracy of human body detection is reduced. In addition, the piezoelectric sensor 3 and the aluminum soaking plate 8 are arranged, so that there is a problem that the number of components is large and the working efficiency at the time of manufacturing is poor.

An object of the present invention is to solve such a conventional problem, and it is a first object of the present invention to simplify a method of fixing a warming tool and to provide a warming tool without displacement.

It is a second object of the present invention to reduce the number of parts and improve the working efficiency during manufacturing.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a heat-generating means, a temperature detecting means arranged in close proximity to the heat-generating means, and a sheet-like sheet provided with a human body detecting means. And a control means for detecting loading / non-loading of a user on the upper surface of the main body based on an output signal of the human body detecting means, and controlling energization to the heating means. It is. Since the sheet-shaped heat conducting means provided with the human body detecting means is used, it is troublesome to dispose the piezoelectric sensor 3 as in the related art, and a positional shift occurs when the piezoelectric sensor 3 is fixed. In addition, it is possible to provide a warming device that can be easily fixed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to solve the above-mentioned problems, the invention of claim 1 uses a sheet-like heat conducting means provided with a human body detecting means. It is possible to provide a warming device that can be easily fixed without taking time and effort during installation and without causing a displacement during fixing.

The invention according to claim 2 uses a human body detecting means provided with a sheet-like heat conducting means. Since the human body detecting means also serves as the heat conducting means, a piezoelectric sensor is provided as in the prior art. This eliminates the need for troublesome work during installation and does not cause displacement during fixing, as well as reducing the number of parts and improving the working efficiency during manufacturing.

A third aspect of the present invention is a piezoelectric sensor in which the human body detecting means is formed by molding and polarizing a piezoelectric material in which a sintered powder of a piezoelectric ceramic is mixed with a rubber elastic organic base material. High-temperature durability is improved as compared with a piezoelectric sensor made of an organic polymer material such as polyvinylidene fluoride used.

According to a fourth aspect of the present invention, the piezoelectric sensor has a center electrode, a piezoelectric material, and an outer electrode formed into a coaxial cable shape, and has a greater degree of freedom in arrangement than a conventional film-shaped piezoelectric sensor. Yes, easy to arrange.

According to a fifth aspect of the present invention, the piezoelectric sensor is formed by arranging a piezoelectric material between a plurality of planar electrodes having thermal conductivity and forming the piezoelectric material into a sheet shape. And the planar electrode can be used also as the heat conducting means, so that the number of parts can be reduced and the working efficiency at the time of manufacturing can be improved. Further, the sensitivity can be improved because the thickness can be formed into a thin sheet shape.

According to the invention of claims 6 to 8, the human body detection means has a plurality of planar electrodes having thermal conductivity and is configured to be able to be used also as heat conduction means, so that the number of parts is reduced. In addition, work efficiency during manufacturing can be improved.

According to a ninth aspect of the present invention, the heat generating means and the temperature detecting means are embedded in a base made of a soft foam having heat insulation and compressibility by integral foam molding.
When the main body is formed, the heat generating means and the temperature detecting means can be easily fixed without causing a positional shift. Also, when the user is loaded on the upper surface of the main body, the base material is compressed and the thermal conductivity is increased, and the heat of the main body below and around the user loading surface moves to the user via the heat conducting means, and If no user is loaded on the upper surface, the base material acts as a heat insulating material, so that the user is warmer when heating, and wasteful power consumption can be suppressed when not heating.

According to a tenth aspect of the present invention, the control means detects a body motion component based on the user's heartbeat and breathing on the upper surface of the main body from the output signal of the human body detecting means, and controls the energization to the heating means. Thus, the accuracy of detecting the loading / unloading of the user is improved.

[0015]

1 to 1 show an embodiment of the present invention.
This will be described with reference to FIG.

(Embodiment 1) The invention of Embodiment 1 will be described with reference to FIGS.

FIG. 1 is an external view of a warming device according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional configuration diagram at a position XX 'in FIG. On the back side of the front surface material 9, a linear heating means 10 and a temperature detecting means 11 are arranged in a plane in a predetermined pattern.
The temperature detecting means 11 is provided so as to be close to the heat generating means 10. Reference numeral 12 denotes a human body detecting means, which is composed of a cable-shaped piezoelectric sensor. The human body detection means 12 is provided on a sheet-like heat conduction means 13. Between the heat conducting means 13 and the heat generating means 10 and the temperature detecting means 11, a base material 1 made of a soft foamed resin such as polyurethane having heat insulating and compressive properties.
4 and a heat insulating layer 1 made of a soft foamed resin such as polyurethane with a predetermined thickness below the heat conducting means 13.
5 is provided on the upper part of the back material 16 to form the main body 17. At this time, the main body 17 is integrally formed by foaming a soft foamed resin such as polyurethane between the surface material 9 and the heat conducting means 13 and between the heat conducting means 13 and the back material 16. Reference numeral 18 denotes control means for controlling the temperature of the main body 17, which controls energization of the heating means 10 by signals from the temperature detection means 11 and the human body detection means 12. The heat generating means 10, the temperature detecting means 11, and the heat conducting means 13 are arranged with a predetermined distance.

The heat conducting means 13 is constituted by laminating and bonding an aluminum sheet 19 and a reinforcing sheet 20 for reinforcing the aluminum sheet 19. The human body detecting means 12 is the aluminum sheet 1
9 and the reinforcing sheet 20. The thickness of the aluminum sheet 19 ranges from 5 μm to 100 μm. A reinforcing sheet such as polyethylene, polyester, or polypropylene is laminated on both sides or one side of the aluminum sheet 19. By using the aluminum sheet 19 as the heat conducting means 13, high heat conductivity can be realized at low cost. However, in order to ensure performance, it is necessary to secure a thickness of at least 5 μm or more. On the other hand, in order to secure flexibility as a constituent material, it is desirable that the thickness be conversely within 100 μm. In addition, the bending durability of the aluminum sheet 19 can be ensured by the reinforcing sheet 20, and the aluminum sheet 19 can be prevented from being divided by a repeated load.

The same material may be used for the base material 14 and the heat insulating layer 15. However, the thickness of the heat insulating layer 15 may be made larger than the base material 14, or a material having a higher heat insulating property than the base material 14 may be used. 1
5 may be used. In addition, the base material 14 is better than the heat insulating layer 15.
May be made more compressible.

FIG. 3 is a sectional view of the human body detecting means 12. As shown in FIG.
This is a piezoelectric sensor formed by laminating and forming a piezoelectric material 22, an outer electrode 23, and a protective coating layer 24 coaxially around and forming a polarization treatment. The piezoelectric material 22 is a mixture of a rubber elastic organic base material and a sintered powder of piezoelectric ceramic. For example, chlorinated polyethylene is used as the rubber elastic body, and a sintered powder of lead zirconate titanate is used as the piezoelectric ceramic. The particle size of the sintered powder is 10 to 300 μm. The sintered powder of lead zirconate titanate (1500 parts by weight) is sufficiently mixed with a roll so as to uniformly disperse the powder in chlorinated polyethylene 100, formed into a predetermined thickness by a press machine, pelletized, and extruded by an extruder. The tubing process is performed to form a coaxial shape together with the center electrode 21, the outer electrode 23, and the coating layer 24, and a polarization process is performed at a predetermined voltage. The outer electrode 23 is a ground electrode for signal derivation and also has a role of an electric shield. Since it is a coaxial cable-shaped piezoelectric sensor,
As shown in FIG. 1, when the heat conducting means 13 is disposed, it can be easily disposed in a meandering manner, and does not need to be folded back.
There is more freedom in arrangement than a film-like sensor that is generally used. In addition, the human body detecting means 12 has a configuration in which both ends thereof are disposed to the control means 18 and the central electrodes 21 and the outer electrodes 23 at both ends are electrically connected to each other in the control means 18 to perform signal processing. Detection means 1
Redundancy is provided so that a signal can be derived from at least one of both ends even if 2 is disconnected in the middle. Further, a configuration may be provided in which the control unit 18 detects conduction of the center electrode 21 or the outer electrode 23 of the human body detection unit 12 to determine disconnection.

FIG. 4 is a block diagram of a warming tool according to the first embodiment of the present invention. As shown in FIG. 4, the control means 18 is the human body detecting means 1.
2, a filter unit 25 for filtering a signal in a predetermined frequency region from the output signal, an amplitude calculator 26 for calculating the amplitude of the output signal of the filter unit 25 per unit time, and an output signal of the power-on and amplitude calculator 26. Is greater than or equal to a preset value, a timer section 27 for starting timekeeping, and energizing the heating means 10 while the timer section 27 is counting, and energizing the heating means 10 when the timer section 27 times out. The power supply control unit 39 for stopping the operation and the temperature setting unit 29 for setting and storing the set temperature of the heating means 10 are provided. Body 17
In order to detect an output signal based on the user's operation on the upper surface and reduce the influence of unnecessary electrical noise, the filter unit 25 is configured to filter a signal of, for example, 10 Hz or less. The control means 18 may be configured to electrically shield the whole.

Next, the operation will be described. As shown in FIG. 2, the human body detecting means 12 is provided in the heat conducting means 13 in advance, and when the main body 17 is formed, it takes time and effort to dispose the piezoelectric sensor 3 as in the related art, It can be easily fixed without causing any problem. Further, between the surface material 9 and the heat conducting means 13 and the heat conducting means 13
Since the main body 17 is integrally formed by foaming a soft foamed resin such as polyurethane between the back material 16 and the backing material 16, the heat generating means 10 and the temperature detecting means 11 may be displaced when the main body 17 is formed. It can be fixed easily without performing. Further, the piezoelectric sensor as the human body detecting means 12 is formed by forming the center electrode 21, the piezoelectric material 22, and the outer electrode 23 into a coaxial cable shape, and has a greater degree of freedom in arrangement than the conventional film-shaped piezoelectric sensor 3. There is easy to arrange.

Next, FIG. 5 shows a cross-sectional configuration diagram when the warming device of the first embodiment is used. If the user sits on the upper surface of the main body 17 or lays down during warming, the base material 14 made of the soft foamed resin is compressed and deformed by the user's own weight. The heat-generating means 10 and the temperature detecting means 11
Is close to the heat conducting means 13. The fact that the user sits on the main body 17 and warms up means that the heat of the main body moves toward the user. According to the embodiment, not only the seating surface but also heat of a wide range of the main body around the seating surface is transferred to the user via the heat conducting means 13. The heat of the wide area of the main body 17 is transferred to the user, so that the main body 1
The temperature of 7 drops. When the temperature of the main body 17 decreases, the temperature detecting means 11 detects the temperature decrease and controls the heating means 10 via the control means 18 so as to increase the duty ratio.

When the user gets off the main body 17, the base material 14
Is restored to the initial shape, so that the heat generating means 10 and the temperature detecting means 11 have a certain distance from the heat conducting means 13. By forming the heat generating means 10 and the temperature detecting means 11 at a predetermined distance from the heat conductive means 13, the heat conductive means 13 can be prevented from functioning as a heat sink when not in use, and unnecessary energy consumption can be prevented. . In addition, heat obtained by increasing the duty ratio during use is supplied to the user and stored in the main body at the same time. When the user descends from the main body, the heat stored in the main body causes the heat generating means 1 to generate heat.
The duty ratio of 0 is suppressed below the duty ratio before use. Since the heat insulating layer 15 is provided below the heat conducting means 13, heat dissipation to the floor surface is suppressed.

Also, based on the output signal of the human body detecting means 12, the loading / non-loading of the user on the upper surface of the main body is detected and the energization to the heating means 10 is controlled. No power is supplied to the heating means 10. Even if the power of the main body is forgotten to be turned off, the non-loading is detected and the heating means 10 is detected.
Stop the power supply to the power supply to prevent unnecessary power supply.

FIG. 6 shows, from the top, the output V of the filter unit 25 and the amplitude calculator 2 when the warming device of the first embodiment is used and not used.
6, an output D of 6, an on / off state of energization to the heating means 10,
In the characteristic diagram showing the duty ratio P to the heat generating means 10, the vertical axis represents the above-described characteristic amounts and the horizontal axis represents time t. From time t in FIG.
When the power of the main body is turned on in step 1, the timer section 27 for keeping the power supply to the heat generating means 10 starts counting time. During the time counting operation of the timer section 27, the power supply to the heat generating means 10 is turned on by the power supply control section 39. The time-up time of the timer unit 27 is T0
And After the power is turned on at time t <b> 1, P rises, and then stabilizes at the duty ratio P <b> 0 according to the set temperature set by the temperature setting unit 29.

At time t2, when the user mounts on the main body 17, the base material 14 is compressed by the loading operation and the human body detecting means 12 is pressed.
Receives a deformation, and outputs a voltage signal corresponding to the acceleration due to the deformation. At this time, since the base material 14 made of a soft foamed resin such as polyurethane has a higher compressive deformation property than the heat insulating material 1 such as a needle punch felt used in the conventional warming device, the base material may be loaded by the user. When the material 14 is compressed, the human body detecting means 12 undergoes greater deformation, so that a large voltage signal can be output from the human body detecting means 12. Further, since the heat insulating layer 15 also has a compressive deformation property,
The heat insulating layer 15 is also compressed by the loading of the user,
As compared with the configuration having only four, the amount of deformation of the human body detecting means 12 can be further amplified, a larger voltage signal can be output from the human body detecting means 12, and the sensitivity of the human body detecting means 12 is improved. Thereby, in the signal processing by the control means 18, the amplification factor can be suppressed, the influence of unnecessary electrical noise can be reduced, and a warming device with good heat insulation can be realized.

The output signal of the human body detecting means 12 is filtered by the filter unit 25, and the amplitude calculating unit 26 calculates the amplitude D of the filtered signal within a unit time. If D is equal to or greater than the preset set value D0, the timer unit 27 is reset and time measurement is started again. Thereafter, an operation due to the user's body movement or the like occurs within T0, and when D becomes D0 or more again, the timer unit 27 resets the time measurement and starts a new time measurement. When the user descends from the main body 17 at time t3 and the time T0 elapses, the timer 27 times out at time t4, and the power supply to the heat generator 10 is stopped by the power supply controller 39. Thereafter, when the user mounts on the main body 17 again at time t5, D becomes greater than or equal to D0 due to the operation at the time of loading, the timer 27 starts counting time, and the power supply to the heat generating means 10 is turned on by the power supply controller 39.

Even if an object other than a human body such as a desk or a chair is loaded on the upper surface of the main body, there is no operation like a human body.
As described above, the power supply to the heat generating means 10 is not performed. Therefore, in the case of a generally used load detection type human body sensor, even if an object other than a person is mounted on the upper surface of the main body, erroneous detection may occur due to the weight of the object and unnecessary energization may be performed. In the warming device, the loading of the user is detected based on the operation of the human body, so that the human body can be detected by distinguishing the person from the object, and there is no erroneous detection and unnecessary power supply is not performed.

Due to the above-described heat transfer, the duty ratio P is increased when the user is loaded, and is reduced when the user is not loaded, as shown in FIG.

The conventional warming device uses a piezoelectric sensor made of an organic polymer material such as polyvinylidene fluoride as a human body detecting means, but the crystal structure of the organic polymer material changes at high temperatures, and the sensitivity changes with time. Becomes unstable.
For example, if left at a high temperature of 100 ° C. for a long time, the molecular crystal of polyvinylidene fluoride oriented in the direction in which the voltage is generated is disturbed, and the crystal structure changes. For this reason, the generated voltage gradually decreases. For this reason, in a warming implement intended to control the energization of the heat generating means by detecting the human body movement, the sensitivity of the human body detection means decreases over time during the generation of heat, so that the human body movement cannot be detected. On the other hand, in the warming implement of Example 1, the heat resistance of the lead zirconate titanate sintered powder is 300 ° C to 350 ° C.
Even when left at 0 ° C., the polarized crystal structure does not change. Therefore, the detection of the human body movement can be stably maintained.

By the above operation, the sheet-like heat conducting means 13 provided with the human body detecting means 12 is used, and it takes time and effort to dispose the piezoelectric sensor 3 as in the prior art.
It is possible to provide a warming device that can be easily fixed without causing a positional shift at the time of fixing.

The human body detecting means 12 is a piezoelectric material 2 in which a sintered ceramic powder is mixed with a rubber elastic organic base material.
This is a piezoelectric sensor formed by molding and polarization processing, and has higher durability at high temperatures than the conventional piezoelectric sensor 3 made of an organic polymer material such as polyvinylidene fluoride.

The piezoelectric sensor 12 is formed by forming the center electrode 21, the piezoelectric material 22, and the outer electrode 23 into a coaxial cable shape, and has a greater degree of freedom in arrangement than the conventional film-shaped piezoelectric sensor 3. Easy to arrange.

Further, the main body 17 is constructed by embedding the heat generating means 10 and the temperature detecting means 11 in a base material 14 made of a soft foam having heat insulating and compressive properties and by integral foam molding. The heat generating means 10 and the temperature detecting means 11 can be easily fixed without causing a positional shift when molding the resin. Further, when the user is loaded on the upper surface of the main body 17, the base material 14 is compressed and the thermal conductivity is increased, so that the heat of the main body below and around the user loading surface moves to the user via the heat conducting means 13. However, if no user is loaded on the upper surface of the main body 17, the base material 14 acts as a heat insulating material, so that the user is warmer when warming up and suppresses unnecessary power consumption when not warming up. Can be.

The control of the amount of heat generated by the heat generating means 10 is not limited to the control of the duty ratio, but may be another control method. Also,
In the first embodiment, a sintered powder of lead zirconate titanate is used as the piezoelectric material 22. However, the piezoelectric material 22 has a high heat resistance and a property of generating a voltage with respect to a pressure load due to the orientation of the crystal structure by polarization (piezoelectric property). The same result as described above can be obtained even when a sintered powder of lead titanate having the above formula (1) is used.

In the first embodiment, the heat conducting means 13 is constituted by using the aluminum sheet 19, but the heat conducting means 13
May be constituted by using a carbon sheet, and it is possible to improve the usability by having high thermal conductivity, high durability against repeated loads, and flexibility. Further, the weight can be reduced.

Further, an automatic heating mode in which the human body detecting means 12 detects the loading / unloading of the user and controls the energization of the heating means 10, and the energization of the heating means 10 manually without using the human body detecting means 12 Control means 1 for selecting a warming mode selection unit which allows the user to select a manual warming mode for turning on / off
8, it is possible to improve usability.

In the first embodiment, the human body detecting means 12
Is disposed on the base material 14 on the back side of the surface material 9, but the human body detecting means 12 may be disposed on the heat conducting means 13 or the heat insulating layer 15.

Further, as shown in FIG. 6, since the duty ratio P changes depending on the operation of the human body, the configuration may be such that the loading / non-loading of the user is detected based on the change in the duty ratio and the heating means 10 is controlled.

When the control means 18 detects the loading of the user based on the output signal of the human body detecting means 12, the heating means 1
A configuration having a high temperature control mode in which 0 is controlled at a high temperature for a predetermined time may be adopted, and the quick warming property is improved. In this case, it may be configured such that the control and safety 18 detects the room temperature, and if the detected room temperature is equal to or lower than the predetermined temperature, the control is performed in the high-temperature control mode. An easy-to-use heating tool that saves power can be realized.

In the first embodiment, the timer 27 is activated by turning on the power and the power supply to the heating means 10 is turned on. However, after the power is turned on, the timer 27 does not operate and the human body detecting means 12 When the loading is detected from the non-loading of the user, the timer unit 27 may be operated to turn on the power supply to the heat generating means 10, and unnecessary time from when the power is turned on until the loading of the user is detected may be unnecessary. There is no electricity and power can be saved.

(Embodiment 2) The invention of Embodiment 2 will be described with reference to FIG. FIG. 7 is a cross-sectional configuration diagram of the warming tool of the second embodiment. As shown in FIG. 7, the warming tool of the second embodiment is configured using a one-wire heater wire 30 having both a heat generating function and a temperature detecting function. By integrating the heat generating function and the temperature detecting function, the temperature of the main body temperature can be controlled more quickly by directly detecting the temperature of the heat generating means in which the temperature of the main body is apt to significantly decrease.

In addition, by increasing the temperature detection capability,
In addition to simply controlling the duty ratio in response to temperature changes using the temperature detection function, the system detects the presence or absence of a user by actively detecting the change in duty ratio, controls the temperature setting, and turns on or off the power supply. It is also possible to plan.

(Embodiment 3) The invention of Embodiment 3 will be described with reference to FIG. FIG. 8 is a configuration diagram of a warming tool according to the third embodiment. As shown in FIG. 8, in the third embodiment, the main body 17 is divided into a plurality of warming sections 17a, 17b, and each warming section 17a, 17b is provided.
1-wire type heater wires 30a, 30b having both functions of a heat generation function and a temperature detection function, and heat conducting means 13a, 13b
(Not shown), the human body detecting means 12a, 12
b, heat conducting means 13a, 13b (not shown), substrate 14
a, 14b (not shown), and the control unit 18 controls each heating unit 17 based on the output signals of the human body detection units 12a, 12b.
The configuration is such that the loading / non-loading of the user on the upper surface of each of the heaters a and 17b is detected, and the energization to the one-wire heater wires 30a and 30b is controlled for each heating section. Each heating section 17a, 1
The sectional structure of 7b is the same as that of the second embodiment, and is as shown in FIG. Note that the number of heating sections is not limited to two as described above, and three or more sections may be provided.

According to the above configuration, the main body 17 is divided into a plurality of heating sections 17a and 17b, and the energization is controlled by detecting the loading / non-loading of the user for each heating section. Can be.

(Embodiment 4) Embodiment 4 will be described with reference to FIGS. FIG. 9 is an external view of a warming tool according to the fourth embodiment, and FIG. 10 is a cross-sectional configuration diagram at a YY ′ position in FIG. The fourth embodiment is different from the first embodiment in that the human body detecting means 12 is configured by arranging a piezoelectric material 32 between a plurality of thermally conductive planar electrodes 31a and 31b and forming the piezoelectric material 32 into a sheet shape. This is the point that the planar electrodes 31a and 31b also serve as the heat conducting means 13, that is, the heat conducting means 13 is disposed on the human body detecting means 12. The piezoelectric material 32 is made of the same material as the piezoelectric material 22 of the first embodiment. Also,
The sheet electrodes 31a and 31b are made of the aluminum sheet 19 of the first embodiment.
And the same members. Note that other configurations are the same as those of the first embodiment, and thus detailed description is omitted. Further, the energizing operation according to the above configuration is the same as that of the first embodiment, and therefore detailed description is omitted.

According to the above configuration, the piezoelectric sensor as the human body detecting means 12 has a plurality of thermally conductive planar electrodes 31a,
Since the piezoelectric member is formed by forming a sheet between the piezoelectric members 31b, the piezoelectric sensor is not shifted and fixed, and the planar electrodes 31a, 31b of the human body detecting means 12 are not fixed.
Also serves as the heat conducting means 13, so that the number of parts is reduced,
Work efficiency during manufacturing can be improved.

Further, since the piezoelectric sensor can be formed into a sheet shape with a small thickness, the usability is improved and the sensitivity is improved.

When a cable-shaped piezoelectric sensor as in the first embodiment is used as the human body detecting means 12, the arrangement density of the piezoelectric sensor must be increased in order to increase the detection capability of detecting the loading / unloading of the user. However, if the density is high, the feeling of use is impaired and the weight of the main body increases. On the other hand, in the fourth embodiment, since the sheet-shaped piezoelectric sensor is used as the human body detection means 12, the entire body can be reliably used as the detection area, and the detection capability is improved.

Further, as in the first embodiment, the human body detecting means 12
Is a piezoelectric sensor formed by molding and polarizing a piezoelectric material 32 obtained by mixing a sintered powder of a piezoelectric ceramic with an organic base material of a rubber elastic body, and is made of a conventional organic polymer material such as polyvinylidene fluoride. High-temperature durability is improved as compared with the piezoelectric sensor 3.

In the fourth embodiment, the planar electrodes 31a, 3a
Although the aluminum sheet is used for 1b, the invention is not limited to the aluminum sheet, and other conductive members having good thermal conductivity may be used. For example,
It may be constituted by using a sheet-like conductive rubber containing carbon, and it is possible to improve the feeling of use and the sensitivity of the human body detecting means 12 by having flexibility.

Although aluminum sheets are used for both the planar electrodes 31a and 31b, only one of the electrodes is formed of an aluminum sheet, and the other is printed with a conductive paste on the surface of the piezoelectric material 32, or a metal material is deposited. May be performed to form an electrode, and the sensitivity can be improved because the thickness can be further reduced. Although the aluminum sheets are used for the planar electrodes 31a and 31b, the sheet electrodes may be formed using a sheet-like conductive rubber containing carbon. Sensitivity can be improved.

Further, it is also possible to use a comb-shaped electrode instead of the planar electrodes 31a and 31b to further improve the flexibility.

(Embodiment 5) The invention of Embodiment 5 will be described with reference to FIG. FIG. 11 is a cross-sectional configuration diagram of the warming tool of the fifth embodiment. As shown in FIG. 11, in the fifth embodiment, the human body detecting means 12 includes a plurality of heat conductive planar electrodes 31a and 31b.
And a compressible insulating layer 33 disposed between the planar electrodes 31a and 31b.
It is configured such that the capacitance between 1b changes.
The sheet electrodes 31a and 31b may be made of an aluminum sheet as in the fourth embodiment.

With the above configuration, when a user is placed on the upper surface of the main body 17, the insulating layer 33 is compressed and the planar electrodes 31a, 31b are compressed.
The control means 18 detects the loading / non-loading of the user based on the increase in the capacitance between them, and controls the energization to the heating means 10. Since the planar electrodes 31a and 31b also serve as the heat conducting means 13, the number of components is reduced as in the fourth embodiment.
Work efficiency during manufacturing can be improved.

In the fifth embodiment, the planar electrode 31b may be provided between the heat insulating layer 15 and the back surface member 16, and the heat insulating layer 15 may also serve as the insulating layer 33, thereby further reducing the number of parts. Can be. (Embodiment 6) The invention of Embodiment 6 will be described with reference to FIG. FIG. 12 is a cross-sectional configuration diagram of the warming tool of the sixth embodiment. As shown in FIG. 12, in the sixth embodiment, a pressure-sensitive conductive material 34 is provided between a plurality of planar electrodes 31a and 31b having thermal conductivity, and the sheet-like material is formed. It is configured such that the electric resistance between the electrodes 31b changes. Planar electrode 3
Aluminum sheets 1a and 31b may be used similarly to the fourth embodiment.

With the above configuration, when the user is placed on the upper surface of the main body 17, the pressure-sensitive conductive material 34 is compressed and the planar electrodes 31a, 3a
Control means 18 based on a decrease in the electrical resistance between
Detects the loading / non-loading of the user and controls the energization of the heating means 10. The planar electrodes 31a and 31b are connected to the heat conducting means 1.
3, the number of parts can be reduced and the working efficiency at the time of manufacturing can be improved as in the fourth embodiment.

(Embodiment 7) The invention of Embodiment 7 will be described with reference to FIG. FIG. 13 is a cross-sectional configuration diagram of the warming tool of the seventh embodiment. As shown in FIG. 13, in the seventh embodiment, a plurality of gaps 3 are provided between a plurality of planar electrodes 31a and 31b having thermal conductivity.
5 and a spacer portion 36 are provided, formed into a sheet shape, and configured to conduct between the planar electrodes 31a and 31b by pressurization. The sheet electrodes 31a and 31b may be made of an aluminum sheet as in the fourth embodiment.

With the above configuration, when the user is placed on the upper surface of the main body 17, the gap 35 is compressed and the planar electrodes 31a, 31b are compressed.
The control unit 18 detects the loading / non-loading of the user based on the conduction between the units, and controls the power supply to the heating unit 10.
Since the planar electrodes 31a and 31b also serve as the heat conducting means 13, it is possible to reduce the number of parts and improve the working efficiency during manufacturing, as in the fourth embodiment.

(Embodiment 8) The invention of Embodiment 8 will be described with reference to FIGS. FIG. 14 is a block diagram of a warming tool according to the eighth embodiment.
A filter 37 for filtering a body motion component based on the heartbeat or respiration of the human body from an output signal of the human body detecting means 12, a smoothing unit 38 for smoothing the output signal of the filter 37, a smoothing unit 38, An energization control unit 3 that controls energization of the heating unit 10 based on output signals of the detection unit 11 and the temperature setting unit 29
9, a heartbeat respiration calculator 40 for calculating at least one of the heart rate and the respiration rate based on the output signal of the smoothing unit 38, and a display unit 41 for displaying the calculation result of the heartbeat respiration calculator 40. It is in. The filtering characteristics of the filter unit 37 are bandpass characteristics of 1 to 10 Hz when detecting a heartbeat, and 0.1 to 1 Hz when detecting respiration. Here, for simplicity of description, the filter unit 37 has a configuration having bandpass characteristics for detecting a heartbeat.

The operation of the above configuration will be described below. FIG. 15 is a characteristic diagram illustrating an output signal of the filter unit 37 according to the eighth embodiment. In FIG. 15A, the vertical axis represents the output V of the filter unit 25, and the horizontal axis represents time t. Further, FIG.
It is an enlarged view of S part of (a). FIG. 16 is a characteristic diagram showing, from the top, the output signal Vs of the smoothing unit 38 and the on / off state of energization to the heating means 10 according to the eighth embodiment. The vertical axis represents each characteristic amount, and the horizontal axis represents time. is there. When the user rests on the main body 17 as shown in FIG. 15A, a periodic fine signal appears on the output V of the filter unit 37. This signal is based on a body motion component based on the heartbeat of the human body as shown in FIG. The output V of the filter unit 37 is
8 for smoothing. Then, as shown in FIG. 16, when the user is put on the main body 17 and the output Vs of the smoothing unit 38 is equal to or more than a preset set value Vs0, the energization to the heating unit 10 is turned on by the energization control unit 39. If the user is not loaded on the main body 17, Vs is less than Vs0, and the power supply to the heating means 10 is turned off by the power supply controller 39. Even if an object such as a desk or a chair other than a human body is loaded on the upper surface of the main body, there is no heartbeat like a human body, so that Vs does not become Vs0 or more, and power is not supplied to the heating means 10. In this way, a human body can be detected by distinguishing a person from an object, and there is no erroneous detection and unnecessary power supply is not performed.

In the first embodiment, the power supply to the heat generating means 10 is performed until the timer section 27 times out after the user gets off the main body 17.
In FIG. 16, as shown in FIG. 16, the power supply to the heating means 10 can be turned off as soon as the user gets off the main body 17, and there is no unnecessary power supply after the user gets off the main body 17.

The heart rate / respiration calculating unit 40 calculates the heart rate based on the output signal of the smoothing unit 38, and the calculation result is displayed on the display unit 41. The heart rate may be determined by, for example, calculating an autocorrelation coefficient or performing frequency analysis. Display unit 4
In 1, not only the calculation result is displayed, but also a configuration may be adopted in which, for example, if the calculation result is out of the predetermined range, a warning is issued assuming that the user has an abnormality.

In the eighth embodiment, the filter unit 37 has a band-pass characteristic for detecting a heartbeat. However, the filter unit 37 has a band-pass characteristic for detecting a respiration, and the heating means 10 is controlled by the presence or absence of a body motion signal due to the respiration. It is good also as composition which controls energization to.

By the above operation, the control means 18 detects a body motion component based on the heartbeat and breathing of the user on the upper surface of the main body from the output signal of the human body detection means 12 and controls the energization to the heating means 10. Therefore, the accuracy of detecting loading / unloading of the user is improved.

Further, since the heart rate and the respiration rate are calculated and displayed from the body motion component based on the detected heart rate and respiration, it is useful for health management.

In order to distinguish a large body motion component due to a change in the posture of the user or a movement of a limb from a fine body motion component based on a heartbeat or breathing, the power supply control unit 39 sets Vs0.
A larger set value Vs1 is provided, and when Vs is Vs0 or more,
If it is less than Vs1, the user is at rest, and if Vs is equal to or more than Vs1, it is determined that a large body motion has occurred, and Vs is Vs.
If it is less than 0, it may be determined to be absent.
In the case of this configuration, the power supply control unit 39 turns on the power supply to the heat generating means 10 when it is determined that the user is in a resting state, and immediately before the heat generating means 10 when it is determined that a large body movement has occurred.
The state of current supply to the heating means 10 is maintained, and if it is determined that the apparatus is absent, the power supply to the heating means 10 is turned off. If the determination that the user is in the resting state continues for a predetermined time or more, the user may be determined to be in a dozing state, and the power may be supplied to the heat generating unit 10 at a low temperature or the power may be turned off.

In the warming implements of the first to eighth embodiments, a heat insulating material layer having excellent compressive deformation may be provided on the upper surface of the main body 17, and when the user is not on the warming implement. By the high heat retention effect, unnecessary energy consumption can be prevented. When the user is placed on the heating device, the base material 14 in the main body is also compressed and deformed by the user's own weight while being compressed. The same operation and effect as those of the first embodiment can be obtained.

Further, an overlay made of a heat insulating material excellent in compressive deformation and a raised portion may be placed on the upper surface of the main body 17. With this configuration, it is possible to reduce power consumption when not in use due to the heat insulating properties of the overlay, and when in use, the overlay is compressed and deformed by the user's own weight, and heat conduction from the main body at the user's seating surface It can secure the property. In addition, by separating the heat insulating material layer on the upper surface of the heating device as described above from the main body 17 and forming the heat insulating layer on the upper overlay used for mounting on the upper surface of the main body 17, it is possible to configure without increasing the thickness of the main body.

Further, in the warming implements of the first to eighth embodiments, an air conditioner, an audiovisual device, or the like is used by using a detection signal of loading / unloading of the user by the warming implement via a wired or wireless communication means. It may be configured to control another device, and energy saving of the entire device including the warming tool can be achieved.

[0072]

As is apparent from the above embodiment, according to the first aspect of the present invention, since the sheet-like heat conducting means provided with the human body detecting means is used, a piezoelectric sensor as in the prior art is used. It is possible to provide a warming device that can be easily fixed without taking time and effort when arranging the device, and without causing a positional shift when the device is fixed.

According to the second aspect of the present invention, the human body detecting means provided with the sheet-like heat conducting means is used.
Since the human body detection means also serves as the heat conduction means, it does not take time and effort to dispose the piezoelectric sensor as in the past, and does not cause positional displacement when fixing, and also reduces the number of parts, Work efficiency during manufacturing can be improved.

According to the third aspect of the present invention, there is provided a piezoelectric sensor in which the human body detecting means is formed by molding and polarizing a piezoelectric material in which a sintered powder of a piezoelectric ceramic is mixed with a rubber elastic organic base material. Therefore, the high-temperature durability is improved as compared with a piezoelectric sensor made of an organic polymer material such as polyvinylidene fluoride which is generally used.

According to the fourth aspect of the present invention, since the piezoelectric sensor is formed by forming the center electrode, the piezoelectric material, and the outer electrode into a coaxial cable shape, the piezoelectric sensor is arranged more than a conventional film-shaped piezoelectric sensor. There is a high degree of freedom in installation and installation is easy.

According to the fifth aspect of the present invention, the piezoelectric sensor is formed by arranging a piezoelectric material between a plurality of planar electrodes having thermal conductivity and forming the piezoelectric material into a sheet shape. The sensor is not displaced and fixed, and the planar electrode can also be used as a heat conducting means, reducing the number of components, improving work efficiency during manufacturing, and forming a thin sheet-like thickness The sensitivity can be improved.

According to the invention of claims 6 to 8, since the human body detecting means has a plurality of heat conductive planar electrodes and is configured to be able to be used also as the heat conducting means, the components The number of points can be reduced, and the working efficiency at the time of manufacturing can be improved.

According to the ninth aspect of the present invention, the heat generating means and the temperature detecting means are made of a heat-insulating material by integral foam molding.
Since the heat generating means and the temperature detecting means are buried in a base made of a soft foam having compressibility, the heat generating means and the temperature detecting means can be easily fixed without causing a positional shift when the main body is formed. Also, when there is loading of the user on the upper surface of the main body, the base material is compressed and the thermal conductivity increases, and the heat of the main body below the user loading surface and the surrounding body moves to the user via the heat conducting means,
If there is no loading of the user on the upper surface of the main body, the base material acts as a heat insulating material, and when the user takes heat, it is warmer,
When not heating, wasteful power consumption can be suppressed.

Further, according to the tenth aspect of the present invention, the control means detects a body motion component based on the heartbeat and breathing of the user on the upper surface of the main body from the output signal of the human body detection means and controls the energization to the heating means. Therefore, the accuracy of detecting loading / unloading of the user is improved.

[Brief description of the drawings]

FIG. 1 is an external view of a warming tool according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional configuration diagram of the heating device.

FIG. 3 is a cross-sectional configuration diagram of a human body detection unit of the warming device.

FIG. 4 is a block diagram of the heating device.

FIG. 5 is a cross-sectional configuration diagram when the warming device is used.

FIG. 6 shows the output V of the filter unit, the output D of the amplitude calculation unit, and the energization of the heating means when the warming device is used or not used.
Characteristic diagram showing the OFF state and the duty ratio P to the heating means

FIG. 7 is a sectional configuration diagram of a warming tool according to a second embodiment of the present invention.

FIG. 8 is a configuration diagram of a warming tool according to a third embodiment of the present invention.

FIG. 9 is an external view of a warming tool according to a fourth embodiment of the present invention.

FIG. 10 is a sectional configuration diagram of a warming tool according to a fourth embodiment of the present invention.

FIG. 11 is a cross-sectional configuration diagram of a warming tool according to a fifth embodiment of the present invention.

FIG. 12 is a sectional configuration diagram of a warming tool according to a sixth embodiment of the present invention.

FIG. 13 is a cross-sectional configuration diagram of a warming tool according to a seventh embodiment of the present invention.

FIG. 14 is a block diagram of a warming tool according to an eighth embodiment of the present invention.

FIG. 15 (a) is a characteristic diagram showing an output signal of a filter unit of the heating device, and FIG. 15 (b) is an enlarged view of a portion S in FIG.

FIG. 16 is a characteristic diagram showing an output signal Vs of a smoothing unit of the warming device and an on / off state of energization to a heating unit.

FIG. 17 is an external view of a conventional warming device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Heat generation means 11 Temperature detection means 12 Human body detection means (piezoelectric sensor) 13 Heat conduction means 14 Base material 15 Heat insulation layer 17 Main body 17a, 17b Heating part 18 Control means 21 Center electrode 22 Piezoelectric material 23 Outer electrode 31a, 31b Planar electrode Reference Signs List 32 piezoelectric material 33 insulating layer 34 pressure-sensitive conductive material 35 void 36 spacer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Biao Nagai 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Masahiko Ito 1006 Odaka Kadoma Kadoma City, Osaka Matsushita Electric Industrial Co. ( 72) Inventor Yuko Fujii 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Satoshi 1006 Odaka Kazuma Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. 1006 Kadoma Kadoma, Matsushita Electric Industrial Co., Ltd. (72) Inventor Takahiko Yamakita 1006 Kadoma Kadoma, Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. F-term (reference) in Denki Sangyo Co., Ltd. 3K058 AA42 AA73 AA81 AA92 AA95 BA02 BA03 CA03 CA22 CA37 CA93 CB 02 CB23 CB27 CB35 CE02 CE12 CE19 CE22 CE25 CF01 GA03 3L072 AA01 AB04 AC02 AD02 AD17 AD19 AE05 AF06 AF11 AG02

Claims (10)

[Claims] A main body having a heat generating means, a temperature detecting means disposed in close proximity to the heat generating means, and a sheet-like heat conducting means provided with a human body detecting means; and the human body detecting means. And a control means for controlling the energization of the heating means by detecting whether or not the user has loaded or unloaded on the upper surface of the main body based on the output signal of the main body. 2. A main body comprising: a heat generating means; a temperature detecting means disposed adjacent to the heat generating means; a human body detecting means provided with a sheet-like heat conducting means; And a control means for controlling the energization of the heating means by detecting whether or not the user has loaded or unloaded on the upper surface of the main body based on the output signal of the main body. 3. The warming-up device according to claim 1, wherein the human body detecting means is a piezoelectric sensor formed by molding and polarizing a piezoelectric material in which a sintered ceramic powder is mixed with an organic base material of a rubber elastic body. Utensils. 4. The warming tool according to claim 3, wherein the piezoelectric sensor has a center electrode, a piezoelectric material, and an outer electrode formed into a coaxial cable shape. 5. The heater according to claim 3, wherein the piezoelectric sensor is formed by arranging a piezoelectric material between a plurality of planar electrodes having thermal conductivity and forming the piezoelectric material into a sheet shape. 6. The human body detecting means is arranged such that an insulating layer is provided between a plurality of planar electrodes having thermal conductivity, and the capacitance between the planar electrodes is changed by pressurization. The warming tool according to claim 2. 7. A human body detecting means, wherein a pressure-sensitive conductive material is disposed between a plurality of thermally conductive planar electrodes to form a sheet, and the electric resistance between the planar electrodes changes by pressing. The warming tool according to claim 2, wherein the warming tool is configured to perform heating. 8. A human body detecting means, wherein a plurality of gaps and spacers are provided between a plurality of thermally conductive planar electrodes and formed into a sheet shape, and the planar electrodes are electrically connected by pressurization. The warming tool according to claim 2, wherein 9. The main body has a heat generating means and a temperature detecting means buried in a base made of a soft foam having heat insulation and compressibility by integral foam molding. When there is loading, the base material is compressed and the thermal conductivity increases, and the heat of the main body below and around the user loading surface moves to the user via the heat conducting means, and the user loads the upper surface of the main body. The warming tool according to any one of claims 1 to 8, wherein the base material acts as a heat insulating material when the heating element is not provided. 10. A control device according to claim 1, wherein said control means detects a body motion component based on a user's heartbeat and breathing on the upper surface of said main body from an output signal of said human body detection means, and controls energization of said heating means. The warming tool according to claim 1.