JP6047354B2 - Mattress and control method thereof - Google Patents

Description

  The present invention relates to a mattress composed of a plurality of cells in which a support portion of a human body can be expanded and contracted, and a control method thereof, and more particularly, to a mattress having a wake-up function for inducing a user's awakening and a control method thereof. is there.

  Conventionally, as a mattress used for bedding or the like, for example, as described in Japanese Patent Application Laid-Open No. 2010-125280 (Patent Document 1), a mattress in which a support portion of a human body is configured by a plurality of cells is known. . In such a mattress, the effect of dispersing body pressure is improved by expanding and contracting the cells with air pressure or the like so that the surface shape conforms to the body shape of the user. Patent Document 1 describes that a wake-up function for waking up the user can be realized by stimulating the user's body with the expansion and contraction of these cells.

  By the way, in order to promote a more comfortable awakening, Japanese Patent Laid-Open No. 2000-316832 (Patent Document 2), Japanese Patent Laid-Open No. 2009-41939 (Patent Document 3), and Japanese Patent No. 4469747 (Patent Document 4) There has been proposed a wake-up device that activates an alarm or lighting based on the sleep state of the user. These wake-up devices described in Patent Documents 2 to 4 measure the number of body movements of the user during sleep, and determine that the sleep is shallow when the number of body movements increases. It is made into the structure where the user is awakened by operating.

  However, even when sleep is deep, body movements such as limb spasms may occur. Therefore, when the depth of sleep is determined based on the number of body movements, there is a risk of erroneous determination, and there is a possibility that an alarm or lighting may be activated when the user is in deep sleep. In addition, the alarm devices described in Patent Document 3 and Patent Document 4 have a problem in that sleep comfort is impaired because a detection device such as an acceleration sensor must be attached to the body in order to detect a user's body movement. It was.

JP 2010-125280 A JP 2000-316832 A JP 2009-41939 A Japanese Patent No. 4469747

  The present invention has been made in the background of the above-mentioned circumstances, and its solution is to detect a user's sleep state more accurately and to wake up the user comfortably. It is to provide a mattress and a control method thereof.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible.

According to a first aspect of the present invention relating to a mattress control method, a plurality of cells are disposed on a body pressure acting surface of a base that supports a user's body, and a fluid chamber formed inside the cell is provided. A mattress control method comprising pressure adjusting means for adjusting pressure, and changing the surface shape by expanding and contracting the cell using the pressure adjusting means, in a time range based on a preset wake-up time. The center axis of the user's body is detected based on the measurement result of the body pressure measuring means for measuring the body pressure applied to the cell within a certain wake-up time, and based on the displacement of the center axis of the user's body. this include a turn detecting step of detecting a turn of the user, when the turn of the user in the turn detection step is detected, the alarm process to induce awakening of the user Te A, and features.

  In the mattress control method according to the present invention, when the user turns over within a wake-up time that is close to a preset wake-up time, a wake-up process that induces the user's wake-up is performed. Here, turning over means, for example, a rough body movement such as a movement from a supine position to a lateral position, a movement from a lateral position to a supine position, or a movement of the central axis of the body as a whole. When a large body movement such as turning over is performed, the person is always awakened (halfway awakening). Therefore, by performing the wake-up process when the user turns over, the user's wake-up can be induced from a state of mid-wakening, and the user can be woken comfortably. In other words, the present invention is based on a completely new approach that has not been used in the past, and it has not been inferred from the number of body movements. In addition, by inducing awakening at the time of awakening midway, the user can be awakened at a more appropriate and accurate timing, and a more comfortable awakening can be promoted.

In addition, since the rollover is detected based on the measurement result of the body pressure measuring means for measuring the body pressure applied to the cell, it is not necessary to attach a special device such as an acceleration sensor to the user's body. It is possible to detect turning over without being restrained. As a result, it is possible to provide a good sleeping comfort. Furthermore, since the rollover is detected based on the displacement of the central axis of the user's body, it is possible to reliably detect the rollover that is the overall movement of the body by eliminating local fine body movements such as extremities. I can do it.

Incidentally, eyes embodiments of the cooled process is a various aspects of the possible adoption, for example, the cell may be stimulated pressurization and depressurization to the user's body, or activate an alarm, lighting May be turned on.

  According to a second aspect of the present invention relating to a mattress control method, in the first aspect of the present invention relating to the mattress control method, the cell is inflated and expanded using the pressure adjusting means in the waking step. By contracting, the user's body is stimulated.

  According to this aspect, an effective wake-up effect can be obtained by moving the cell up and down to give a direct stimulus to the user's body. The expansion and contraction modes of the cells are arbitrary. For example, all the cells may be moved up and down at the same time, or only the cell where the user's upper body and head are located may be moved up and down. good. Further, as the time elapses, the expansion amount of the cell may be increased stepwise, or the speed of expansion / contraction may be increased stepwise.

  A third aspect of the present invention relating to a mattress control method is the one described in the first or second aspect of the present invention relating to the mattress control method, wherein the bed leaving detection step detects the user's bed leaving, And a wake-up end step of ending the wake-up step when the user's bed is detected in the bed-off detection step. According to this aspect, when the user wakes up and gets off the mattress, the wake-up process can be automatically ended.

In the first aspect of the present invention relating to a mattress, a plurality of cells are disposed on a body pressure acting surface of a base body supporting a user's body, and the pressure of a fluid chamber formed inside the cell is adjusted. a pressure regulating means for, in a mattress to change the surface shape by expanding and contracting the cell with a pressure adjusting means, and the body pressure measuring means for measuring the body pressure applied to the front SL cells, bodily pressure It detects the center axis of the measurement results of the user based on the body measurement means, and turn detecting means for detecting a turn of the user based on the displacement of the center axis of said use's body, is set in advance and a time range based on the wake-up time in the alarm time when the turn of the user is detected in said turn detecting means, this including the alarm means to induce awakening of the user A, and features.

  According to the mattress having the structure according to the present invention, when the user turns over, the operation of the wake-up means is started. As a result, it is possible to wake up from a state of being awakened in the middle of turning over and to wake up the user comfortably. In particular, since the wake-up means is activated based on the rough body movement of the user turning over, for example, a structure that detects the depth of sleep based on the number of body movements, the malfunction caused by the fine body movement. There is no fear.

  According to a second aspect of the present invention relating to a mattress, in the first aspect of the present invention relating to the mattress, the wake-up means expands and contracts the cell using the pressure adjusting means. It stimulates the user's body. According to this aspect, an effective wake-up effect can be obtained by moving the cell up and down to give a direct stimulus to the user's body. The mode of cell expansion and contraction can be set arbitrarily.

  In the mattress and the control method thereof according to the present invention, the user's turning is detected to induce the user's awakening. Thus, based on the user's turning over, it is possible to wake up the user from a state of being awakened in the middle of turning over and to wake up the user more comfortably.

The perspective assembly drawing of the bed provided with the mattress of this invention. The top view of the mattress of this invention. III-III sectional drawing in FIG. The perspective view of a cell. Sectional drawing of the cell shown in FIG. Explanatory drawing of the system configuration | structure of the mattress of this invention. The top view of the electrostatic capacitance type sensor which comprises a body pressure sensor. VIII-VIII sectional drawing in FIG. Explanatory drawing for demonstrating the correspondence of a cell and a detection part. The flowchart which shows the control method of this invention. Explanatory drawing which shows the relationship between wake-up time and awakening time. The flowchart which shows a body pressure dispersion | distribution process. Cross-sectional explanatory drawing for demonstrating the operation | movement aspect of a body pressure dispersion | distribution process. Explanatory drawing for demonstrating the processing content of the rolling detection process. The flowchart which shows a rollover detection process. The flowchart which shows a center axis detection process. Explanatory drawing for demonstrating the operation | movement aspect of a wake-up process. The flowchart which shows a wake-up process.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, FIG. 1 shows a bed 12 having a mattress 10 structured according to the present invention. The bed 12 has a structure in which the mattress 10 is placed on the upper surface of the floor plate 16 in the bed main body 14. The mattress 10 includes a mattress main body 18 and a top mat 20.

  2 and 3 show the mattress 10. In FIG. 2, the top mat 20 is shown through. The mattress main body 18 includes a box-shaped housing portion 22 and a plurality of cells 24 accommodated in the housing portion 22. In the following description, unless otherwise specified, the vertical direction is the vertical direction in FIG. 2, the horizontal direction is the horizontal direction in FIG. 2, and the vertical direction is the vertical vertical direction. The vertical direction in 3 shall be said.

  The casing 22 is entirely formed of an elastic cushion material, and a bottom mat 28 as a base body is fitted in the lower opening of the frame 26, and the cushion is formed in the upper opening of the frame 26. A top mat 20 as a layer is fitted and formed.

  The frame 26 is an elastic member formed entirely of porous urethane foam, and a head side block 30 and a leg side block 32 arranged so as to be parallel to each other are a pair of side blocks. It is made into the structure connected by 34 and 34, and is exhibiting the rectangular frame shape in the up-down direction. The material for forming the frame body 26 is not particularly limited and is not limited to a foamable material. However, considering deformation followability when performing contact with the human body or raising the back, etc. It is desirable to be formed of a material having elasticity.

  The bottom mat 28 is a rectangular plate-like member that is thinner in the vertical direction than the frame body 26 and is formed of porous urethane foam in this embodiment. Further, the bottom mat 28 corresponds to the opening of the frame 26 in the shape viewed in the vertical direction. By accommodating such a bottom mat 28 in the lower opening of the frame body 26, a housing space 36 is formed inside the frame body 26.

  A plurality of cells 24 are accommodated in the accommodation space 36. As shown in FIGS. 4 and 5, the cell 24 is formed of, for example, a urethane film or the like, and has a substantially rectangular shape (rounded corners) whose corners are rounded in an arc shape in plan view (viewed in the height direction). It is a single bag or a balloon having a rectangular shape.

  A fluid chamber 42 is formed inside the cell 24. The fluid chamber 42 is substantially sealed from the outside, and communicates with the outside through a cylindrical port 44 penetrating through the bottom of the cell 24. Then, fluid such as air is supplied to and discharged from the fluid chamber 42 through the port 44, whereby the internal pressure of the fluid chamber 42 is adjusted, and the cell 24 is expanded and contracted. The fluid supplied to and discharged from the cell 24 is not limited to a gas such as air, and for example, a liquid such as water can be used.

  As shown in FIG. 3, such a cell 24 is disposed on the upper surface of the bottom mat 28, and the bottom surface is fixed to the bottom mat 28 at the center portion (around the port 44), and is attached to the bottom mat 28. It is supported so that it can tilt. As a result, the plurality of cells 24 are accommodated in the accommodation space 36 of the housing portion 22.

  As schematically shown in FIG. 6, seven cells 24 are arranged in the lateral direction of the mattress 10, and include seven cells 24 and one child controller 48. A cell unit 50 is configured. By arranging 21 sets of such cell units 50 in the longitudinal direction of the mattress 10, a total of 147 cells (7 × 21 sets) of cells 24 are arranged in the housing portion 22.

  The cell unit 50 includes a sub pipe 52 and a branch pipe 54 that branches from the sub pipe 52 for each cell 24 and is connected to the port 44 of the cell 24. Although not shown, the port 44 of the cell 24 is disposed through the bottom mat 28, and the branch conduit 54 is connected to the port 44. A cell drive valve 56 is provided on each branch pipe 54. The cell drive valve 56 is, for example, an electromagnetic valve, and is electrically connected to the slave controller 48 so that the communication and blocking of the branch pipe 54 can be selectively switched based on a control signal from the slave controller 48. It has become. Although not shown in detail, the child controller 48 is disposed on the side of the mattress 10. The cell driving valve 56 may be disposed, for example, in the bed main body 14 below the mattress 10, but by extending the branch pipe 54, the cell driving valve 56 and the slave controller 48 are connected to the seven cell driving valves 56. It may be arranged in a concentrated manner on the side of 10.

  The sub pipe lines 52 of the cell units 50 are connected to the main pipe line 60 extended from the pump device 58. The pump device 58 is provided with, for example, an air supply valve 62 and an exhaust valve 64 which are electromagnetic valves, and are connected to the main pipe line 60. The air supply valve 62 is connected to a pump 66 provided in the pump device 58. On the other hand, the exhaust valve 64 communicates with the atmosphere. Further, the pump device 58 is provided with a pressure gauge 68 and is connected to the main pipe line 60.

  The pump device 58 is provided with a parent controller 70. The parent controller 70 is electrically connected to the air supply valve 62, the exhaust valve 64, and the pump 66, and controls these operations based on control signals from a control device 74 described later. Furthermore, the master controller 70 is electrically connected to a pressure gauge 68 so that the internal pressure of the main pipe line 60 can be measured. Further, the parent controller 70 is electrically connected to the child controller 48 of each cell unit 50, and each cell drive valve 56 in each cell unit 50 is transmitted by transmitting a control signal to each child controller 48. The operation of is controlled. Furthermore, the pump device 58 is provided with a power supply device 72. The power supply device 72 is connected to the child controller 48 of each cell unit 50 and supplies driving power to the child controller 48 and the cell driving valve 56.

  Such a parent controller 70 of the pump device 58 is electrically connected to the control device 74. The control device 74 is a computer, a CPU (Central Processing Unit) 76, a ROM (Read Only Memory) 78, a RAM (Random Access Memory) 79, an input means 80, an output means 81, a drive circuit 82, A power supply circuit 102 and a timer means 104 described later are provided. The ROM 78 stores a control program based on a control method described later. The RAM 79 temporarily stores the calculated value of the control program, the measured value from the pressure gauge 68, and the like. The input unit 80 may be a keyboard, a mouse, or the like, or may be an operation device provided with a dedicated button. The output means 81 is a liquid crystal display, a CRT display, or the like. Then, the CPU 76 transmits a control signal to the master controller 70 of the pump device 58 through the drive circuit 82 based on the control program stored in the ROM 78, thereby supplying and discharging air to the main pipeline 60 and driving each cell. The operation of the valve 56 is controlled.

  Thus, for example, based on a control signal from the control device 74, the air supply valve 62 is opened and air is supplied from the pump 66 to the main pipeline 60, and some of the plurality of cell drive valves 56 are By selectively opening and communicating the fluid chamber 42 of the cell 24 with the main conduit 60, only the pressure of the fluid chamber 42 of the specific cell 24 communicating with the main conduit 60 is increased, and the cell 24 The height of can be increased. Further, the exhaust valve 64 is opened to communicate the main pipeline 60 with the atmosphere, and only the specific cell drive valve 56 is selectively opened to communicate the fluid chamber 42 of the cell 24 with the main pipeline 60. Only the pressure of the fluid chamber 42 of the specific cell 24 connected to the main pipe line 60 can be lowered, and the height of the cell 24 can be lowered. As described above, in the present embodiment, the pressure adjustment for adjusting the pressure of the fluid chamber 42 of the cell 24 includes the control device 74, the pump device 58, and the child controller 48 and the cell drive valve 56 of each cell unit 50. Means are configured.

  As shown in FIG. 3, the top mat 20 is fitted into the upper opening of the frame body 26 in which the plurality of cells 24 are accommodated in the accommodation space 36, and overlapped with the cells 24 in the accommodation space 36. Has been. The top mat 20 is substantially the same as the bottom mat 28 in the vertical direction, and has a rectangular plate shape that is thicker than the bottom mat 28. The top mat 20 has a laminated structure having a surface layer portion 84 as a first cushion layer and a back layer portion 86 as a second cushion layer, each of which is formed of porous urethane foam. In addition, although the surface layer part 84 and the back layer part 86 may be formed with the same material, the more comfortable sleeping can be exhibited by forming with the material from which an elastic modulus etc. differ.

  In the top mat 20, a body pressure sensor 88 as body pressure measuring means is provided between the surface layer portion 84 and the back layer portion 86. As the body pressure sensor 88, a load cell using a strain gauge or a magnetostrictor may be used, for example, a strain gauge may be disposed at the four corners of the top mat 20 to constitute a surface pressure distribution sensor. In this embodiment, as shown in FIG. 2, the body pressure sensor 88 is configured by the three sheet-like capacitive sensors 89 a to 89 c. As the capacitance type sensors 89a to 89c, conventionally known ones can be appropriately employed. Since the capacitance type sensors 89a to 89c have the same structure, the capacitance type sensors are hereinafter described. The outline will be described by taking 89a as an example.

  7 and 8 schematically show the capacitive sensor 89a. In FIG. 7, a dielectric layer 90 and a front-side base material 92 which will be described later are shown in a transparent manner, and a detection unit 100 which will be described later is indicated by a hatched square.

  The capacitive sensor 89a includes a dielectric layer 90, front side electrodes 01X to 16X as first electrode films, back side electrodes 01Y to 16Y as second electrode films, front side wirings 01x to 16x, and back side wirings 01y to 01y. 16y, a front-side base material 92, a back-side base material 94, a front-side wiring connector 96, a back-side wiring connector 98, and a control device 74.

  The dielectric layer 90 is made of urethane foam as an elastomer, has a rectangular plate-like sheet shape, and can be elastically deformed. The dielectric layer 90 has substantially the same size as the upper opening of the frame body 26.

  The front side base material 92 is made of rubber and has a rectangular plate shape. The front side base material 92 is laminated on the upper side (front side) of the dielectric layer 90. The back side base material 94 is made of rubber and has a square plate shape. The back side substrate 94 is laminated below the dielectric layer 90 (back side).

  As shown in FIG. 8, the outer edge of the front-side base material 92 and the outer edge of the back-side base material 94 are joined, and the front-side base material 92 and the back-side base material 94 are bonded together in a bag shape. The dielectric layer 90 is accommodated in the bag. The top four corners of the dielectric layer 90 are spot-bonded to the bottom four corners of the front substrate 92. Further, the lower four corners of the dielectric layer 90 are spot-bonded to the upper four corners of the back-side substrate 94. Thus, the dielectric layer 90 is positioned on the front side base material 92 and the back side base material 94 so as not to be wrinkled during use. However, the dielectric layer 90 can be elastically deformed in the horizontal direction (front and rear, left and right directions) with respect to the front side base material 92 and the back side base material 94 with the four corners adhered.

  A total of 16 front side electrodes 01 </ b> X to 16 </ b> X are arranged on the upper surface of the dielectric layer 90. The front-side electrodes 01X to 16X are each formed including acrylic rubber and conductive carbon black. Each of the front side electrodes 01X to 16X has a strip shape and is formed to be flexible and extendable. The front-side electrodes 01X to 16X each extend in the lateral direction (left-right direction in FIG. 7). The front-side electrodes 01X to 16X are arranged so as to be substantially parallel to each other with a predetermined interval therebetween in the vertical direction (vertical direction in FIG. 7).

  A total of 16 front-side wirings 01x to 16x are arranged on the upper surface of the dielectric layer 90. The front-side wirings 01x to 16x are each formed including acrylic rubber and silver powder. The front side wirings 01x to 16x each have a linear shape. The front-side wiring connector 96 is disposed at the corners of the front-side base material 92 and the back-side base material 94. The front side wirings 01x to 16x connect the end portions of the front side electrodes 01X to 16X and the front side wiring connector 96, respectively.

  A total of 16 back-side electrodes 01Y to 16Y are arranged on the lower surface of the dielectric layer 90. The back-side electrodes 01Y to 16Y are each formed including acrylic rubber and conductive carbon black. Each of the back-side electrodes 01Y to 16Y has a belt shape and is formed to be flexible and extendable. The back-side electrodes 01Y to 16Y each extend in the vertical direction (vertical direction in FIG. 7). The back-side electrodes 01Y to 16Y are arranged so as to be substantially parallel to each other at a predetermined interval in the lateral direction (left-right direction in FIG. 7). Thus, the front-side electrodes 01X to 16X and the back-side electrodes 01Y to 16Y are arranged in a lattice shape orthogonal to each other when viewed from above or below.

  A total of 16 back-side wirings 01y to 16y are arranged on the lower surface of the dielectric layer 90. Each of the back side wirings 01y to 16y is formed to include acrylic rubber and silver powder. The back side wirings 01y to 16y each have a linear shape. The back side wiring connector 98 is disposed at the corners of the front side base material 92 and the back side base material 94. The back side wirings 01y to 16y connect the ends of the back side electrodes 01Y to 16Y and the back side wiring connector 98, respectively.

  The detection unit 100 is arranged at a portion where the front-side electrodes 01X to 16X and the back-side electrodes 01Y to 16Y intersect in the vertical direction (overlapping portions) as shown by the hatched rectangle in FIG. The dielectric layer 90 is arranged substantially evenly across the entire surface. Each of the detection units 100 includes a part of the front-side electrodes 01X to 16X, a part of the back-side electrodes 01Y to 16Y, and a part of the dielectric layer 90. A total of 256 detection units 100 (= 16 × 16) are arranged.

  As shown in FIG. 7, the control device 74 is electrically connected to the front-side wiring connector 96 and the back-side wiring connector 98. The control device 74 is provided with a power supply circuit 102. The power supply circuit 102 sequentially applies a periodic rectangular wave voltage to the detection unit 100 in a scanning manner. The ROM 78 stores in advance a map showing the correspondence between the capacitance of the capacitor configured in the detection unit 100 and body pressure (load). On the other hand, the RAM 79 temporarily stores the capacitance of the detection unit 100 input from the front-side wiring connector 96 and the back-side wiring connector 98. The CPU 76 detects the body pressure acting on the detection unit 100 based on the map stored in the ROM 78 from the electrostatic capacity of the detection unit 100 stored in the RAM 79. The body pressure detected by the detection unit 100 is detected as an integer value, and in the present embodiment, corresponds to the detection value: 1021 = 150 mmHg. As shown in FIG. 2, the three capacitive sensors 89 a, 89 b and 89 c are connected to a common control device 74.

  As shown in FIG. 2, these capacitance sensors 89a, 89b, 89c are arranged side by side to form a body pressure sensor 88. As shown in FIG. The top mat 20 including the pressure sensor 88 is fitted into the upper opening of the frame body 26 and overlapped with the plurality of cells 24 housed in the housing space 36 of the frame body 26. As a result, the body pressure sensor 88 is spread along the bottom mat 28 via the plurality of cells 24, and each detection unit 100 of the body pressure sensor 88 is placed in each cell 24 as shown in FIG. 2. Superimposed. As a result, the body pressure applied to each cell 24 can be detected by the body pressure sensor 88.

  Note that the body pressure sensor 88 in this embodiment includes a total of 256 (= 16 × 16) detection units 100, 16 in the vertical direction in FIG. 2 and 16 in the horizontal direction in FIG. Further, the capacitance type sensors 89a, 89b, and 89c are arranged in a line in the vertical direction, so that a total of 756 (16 × 3 = 48 in the vertical direction and 16 in the horizontal direction) (= 48). (16 × 16) detectors 100 are provided. Accordingly, the number of detection units 100 of the body pressure sensor 88 is larger than the number of cells 24 (7 × 21 columns = 147), and a plurality of detection units 100 are superimposed on each cell 24. Yes.

  The mattress 10 having such a structure is overlaid on the floor plate 16 of the bed main body 14 as shown in FIG. When the user lies on the mattress 10, the body pressure of the user acts on the top mat 20, the plurality of cells 24, and the bottom mat 28, and the user's body is supported by the floor plate 16 of the bed body 14. It has become so. A body load (body pressure) based on gravity acting on the user acts downward, so that the top surface of the top mat 20, the cell 24, the bottom mat 28, and the floor board 16 are affected by body pressure. The working surface.

  Next, an embodiment of the present invention relating to a mattress control method will be described.

  First, the detection unit 100 and the cell 24 in the present embodiment are associated as shown in FIG. In FIG. 9, one frame surrounded by a thick line represents one cell 24, and a small square in the frame represents one detection unit 100. The left side in FIG. 9 corresponds to the upper side in FIG. As is clear from FIG. 9, in the present embodiment, the number of detection units 100 that are superimposed on the cell 24 varies depending on the position of the cell 24.

  In each cell 24, X cell Nos. 1 to 21 with the horizontal direction in FIG. And Y cell Nos. 1 to 7 in which the vertical direction in FIG. And are allocated. Similarly, each detection unit 100 includes X sensor Nos. 1 to 48 with the horizontal direction in FIG. And Y sensor Nos. 1 to 16 in which the vertical direction in FIG. And are allocated. Hereinafter, when a specific cell 24 is indicated, it is represented as a cell 24 (X cell No., Y cell No.), and when a specific detection unit 100 is indicated, the detection unit 100 (X sensor No., Y sensor No.). For example, the cell 24 located at the lower left in FIG. 9 (upper left in FIG. 2) is represented as cell 24 (1, 1), and the cell 24 located at the upper right in FIG. 9 (lower right in FIG. 2) It is written as cell 24 (21, 7). Similarly, the detection unit 100 located at the lower left in FIG. 9 (upper left in FIG. 2) is referred to as a detection unit 100 (1, 1), and is detected at the upper right in FIG. 9 (lower right in FIG. 2). The unit 100 is referred to as a detection unit 100 (48, 16).

  The correspondence between the detection unit 100 and the cell 24 is stored in the detection unit-cell correspondence table shown in Table 1 provided in the ROM 78 of the control device 74. In the detection unit-cell correspondence table, the correspondence between each detection unit 100 (1, 1) to 100 (48, 16) and the cell 24 (1, 1) to 24 (21, 7) on which the detection unit 100 (1, 1) to 100 (48, 16) is superimposed. It is remembered.

  FIG. 10 shows the processing contents of the CPU 76 of the control device 74. First, after storing the wake-up time designated by the user operating the input means 80 of the control device 74 in the RAM 79 in S1, the CPU 76 uses the wake-up time as a reference in S2 as shown in FIG. A wake-up time that is a predetermined time range is set and stored in the RAM 79. In the example of FIG. 11, a time range of 30 minutes is set in advance as a wake-up time, and AM6: 30 to AM7, which is a time range 30 minutes before, based on AM7: 00 of the wake-up time set by the user. Between 00 is set as a wake-up time. As described above, the wake-up time may be set in advance as a predetermined time such as 30 minutes, or set by the user specifying the wake-up start time (for example, AM 6:30 in FIG. 11). You may do it.

  Next, the CPU 76 executes a body pressure dispersion process in S3. FIG. 12 shows the contents of the body pressure dispersion process (S3). First, in S20, the CPU 76 acquires a detection value: Sr of all the detection units 100. Next, in S21, when there is no detection unit 100 with a detection value: Sr> 100 (S21 = No), the CPU 76 ends the body pressure dispersion process on the assumption that the body pressure has already been dispersed. On the other hand, when the detection unit 100 with the detection value: Sr> 100 exists (S21 = Yes), based on the detection unit-cell correspondence table stored in the ROM 78 in S22, the detection unit with the detection value: Sr> 100. The cell 24 in which 100 exists is searched, and the cell driving valve 56 of the obtained cell 24 is opened and the exhaust valve 64 is opened to decompress the cell 24. Then, in S23, it is determined whether or not the internal pressure of the cell 24 has become smaller than a predetermined value (3 kPa in the present embodiment). If the internal pressure of the cell 24 is equal to or higher than the predetermined value (S23 = No), Returning to S22, the decompression of the cell 24 is continued.

  On the other hand, when the internal pressure of the cell 24 becomes smaller than the predetermined value (S23 = Yes), after detecting the detection values Sr of all the detection units 100 in S24, the detection value Sr> 100 in S25. If there is a detection value: Sr> 100 (S25 = Yes), it is assumed that sufficient body pressure dispersion has not yet been made, and the detection value: For other cells 24 in which the detection unit 100 with Sr> 100 exists, the processes after S22 are repeated. On the other hand, when the detection unit 100 with the detection value: Sr> 100 does not exist (S25 = No), it is determined that the body pressure dispersion has been completed, and the body pressure dispersion process (S3) is terminated.

  By performing such body pressure dispersion processing (S3), as shown schematically in FIG. 13, the cells 24 to which a relatively large body pressure is applied, such as the user's head and buttocks, are reduced. Thus, the surface shape of the mattress 10 is transformed into a shape along the body surface of the user. Thereby, the contact area of a user's body and the mattress 10 is increased, and a body pressure can be disperse | distributed. Such body pressure dispersion processing (S3) is repeatedly executed at an appropriate time interval of, for example, 1 second to 1 hour until a wake-up time described later is reached.

  Then, in S4, the CPU 76 obtains the current time from the timer means 104, determines whether or not the set wake-up time (in this example, AM 6:30) has been reached, and still reaches the wake-up time. If not (S4 = No), the body pressure dispersion process (S3) is repeated at predetermined intervals. On the other hand, when the wake-up time is reached (S4 = Yes), a rollover detection process as a rollover detection process is executed in S5.

  In the present embodiment, the rollover detection process (S5) detects the rollover based on the displacement of the central axis of the user's body. The outline of the rollover detection process (S5) will be described with reference to FIG. First, as shown in FIG. 14A, from the load distribution in the y direction (1y to 16y) in the detection unit 100 of each x row (1x to 48x), the barycentric position on each x row based on the following equation: : G (x) is calculated. In the following expression, Sr (x, y) is a detection value of the detection unit (x, y). Then, a line connecting the gravity center position: G (x) on each x column is detected as the body central axis: O. By repeatedly performing such detection of the central axis O of the body, the displacement of the central axis O of the body is detected.

Then, as shown in FIG. 14B, for each x column, the currently detected centroid position: G (x) (y coordinate) with respect to the previously detected centroid position: G (x) ′ (y coordinate value). Value) movement amount: ΔG (x) (= G (x) ′ − G (x)) is calculated, and the center-of-gravity movement amount of each x column: ΔG (x) average: ΔG (x) _ave is calculated. To do. Then, when the average of the center-of-gravity movement amount: ΔG (x) _ave is equal to or greater than a predetermined value, it is detected that the center axis O of the body is greatly displaced and the body is turned over.

  In order to realize such processing, the RAM 79 of the control device 74 is provided with a centroid position storage area shown in Table 2. In the center-of-gravity position storage area, for each of the x columns (1x to 48x), a detection flag and a center-of-gravity position: G (x) ′ indicating the detection result of the previous center-of-gravity position and the detection result of the current center-of-gravity position are shown. The detection flag and the gravity center position: G (x) are stored. The detection flag is, for example, a flag indicating whether or not the center of gravity position: G (x) has been detected because an x-row in which the user's body does not exist may be generated. When the detection flag is ON, the center of gravity position: This indicates that G (x) has been detected, and when the detection flag is OFF, it indicates that the center of gravity position: G (x) has not been detected.

  FIG. 15 shows the processing contents of the rolling detection process (S5) executed by the CPU. First, in S30, the CPU 76 executes a center axis detection process. The center axis detection process (S30) is shown in FIG. As a pre-processing, when the detection flag and the gravity center position: G (x) are stored in the current portion of the gravity center position storage area (see Table 2) for all x columns in S40 as the preprocessing, The value of the detection flag and the center of gravity position: G (x) stored in is stored again as the previous detection flag and the center of gravity position: G (x) ′.

Next, in S41, the CPU 76 repeats the processing after S42 in order from 1x for each x column (1x to 48x). In S42, the CPU 76 detects all the detection units 100 (x, 1) to 100 (x, 16) located in the x column (x is the number of the x column, 1 to 48, the same applies hereinafter): Sr (x, y) is acquired. Next, in S43, the CPU 76 determines whether or not a threshold value that is assumed to be exerted when the human body is supported is detected from the obtained detection values: a value greater than or equal to m _th. To do. When a value equal to or greater than the threshold: m _th is detected (S43 = Yes), in S44, the detection flag for the x column (see Table 2) is turned ON and stored for the current time in the centroid position storage area. , In S45, based on the detection value: Sr (x, y) and the above equation 1 of the detection units 100 (x, 1) to 100 (x, 16) in the x column, the gravity center position on the x column: G After calculating (x) and storing it for the current time in the center-of-gravity position storage area, the processing after S47 is performed.

On the other hand, in S43, when a value equal to or greater than the threshold value: m _th is not detected in the obtained detection value: Sr (x, y) (S43 = No), there is a human body on the x column. Otherwise, it is assumed that the center of gravity position: G (x) cannot be calculated because it floats from the mattress 10 as in the neck or the like, and in S46, the detection flag is turned OFF and stored in the current position in the center of gravity position storage area of the RAM 79. After that, the processing after S47 is performed.

  Then, in S47, when the above processing is not completed for all x columns 1x to 48x (S47 = No), the CPU 76 repeats the processing after S42 for the next x column. On the other hand, when the above process is completed for all the x columns, the central axis detection process (S30) is terminated.

  Accordingly, the center of gravity position G (x) of the user's body on all x columns 1x to 48x is obtained, and the line connecting the center of gravity position G (x) on each x column is It is detected as the central axis of the body: O (see FIG. 14). Thus, in the present embodiment, the central axis detecting means is configured including the body pressure sensor 88, the control device 74, and S30.

After the completion of the central axis detection process (S30), the CPU 76 determines that the previous and current detection flags are both ON from the barycentric position storage area (see Table 2) stored in the RAM 79 in S31 shown in FIG. For the x column, the movement amount: ΔG (x) (= G (x) ′ − G (x)) of the current gravity center position: G (x) with respect to the previous gravity center position: G (x) ′ is calculated, Calculate the center-of-gravity movement amount of row: average of ΔG (x): ΔG (x) _ave . Note that the center-of-gravity movement amount: ΔG (x) (= G (x) ′ − G (x)) is calculated by the center axis detection process (S30) performed last time and the center axis detection process (S30) performed this time. In both cases, calculation is performed only for the center of gravity where G (x) ′ and G (x) are obtained. Therefore, since the previous center-of-gravity position: G (x) ′ does not exist when the first turning detection process is executed, the processes after S31 are not executed, and only the central axis detection process (S30) is executed. Become. Since the number of center-of-gravity movement amounts: ΔG (x) obtained may differ each time the rollover detection process (S5) is executed, the total of the center-of-gravity movement amounts: ΔG (x) of each x column is calculated as follows. The center-of-gravity movement amount: ΔG (x) _ave is calculated by dividing the center-of-gravity movement amount: ΔG (x) by the number of x columns obtained.

Next, in S <b> 32, the CPU 76 determines whether or not the average value of the obtained center-of-gravity movement amount: ΔG (x) _ave is larger than a preset turning determination threshold. The rollover determination threshold value is a threshold value of an absolute value of the average movement amount of the center of gravity: ΔG (x) _ave assumed to be detected when the rollover is performed. Preferably, a predetermined value of 0.5 to 1.5 is set, and in the present embodiment, it is set to 0.5. If the average absolute value of the center-of-gravity movement amount: | ΔG (x) _ave | is larger than the rollover determination threshold (S32 = Yes), it is determined that there has been a rollover in which the central axis of the body: O has moved greatly. In step S33, the turnover flag provided in the RAM 79 is turned on, and the turnover detection process (S5) ends. On the other hand, if the average absolute value of the center-of-gravity movement amount: | ΔG (x) _ave | is not larger than the rollover determination threshold (S32 = No), it is assumed that there was no rollover and is provided in the RAM 79 in S34. The turnover flag is turned off, and the turnover detection process (S5) is terminated. Thus, in the present embodiment, the turning detection means is configured including the body pressure sensor 88, the control device 74, and S5.

  As shown in FIG. 10, after completion of the rollover detection process (S5), the CPU 76 determines whether or not rollover is detected in the previous rollover detection process (S5) in S6, that is, the rollover flag stored in the RAM 79. Is turned ON, and if the rollover flag is ON (S6 = Yes), the wake-up process as the wake-up process is executed in S8. On the other hand, if the turnover flag is not ON (S6 = No), it is determined in S7 whether or not the set wake-up time (in this example, AM 7:00) has been reached. If the wake-up time has not arrived (S7 = No), the process returns to S5 and repeats the turning detection process. On the other hand, when the wake-up time has arrived (S7 = Yes), the wake-up process is executed in S8. In other words, even when no wake-up occurs within the wake-up time (S6 = No), the wake-up process is started when the wake-up time has arrived (S7 = Yes).

  In the wake-up process (S8) in this embodiment, as shown in FIG. 1 to 11 and the X cell No. Is divided into two areas of area B of 11 to 21 (cell 24 of X cell No. = 11 is common to both areas), and cell 24 of area A or area B where the user's upper body exists, At the same time, by repeating the pressurization and decompression, the upper body of the user is moved up and down to promote awakening.

  FIG. 18 shows the details of the wake-up process (S8). First, in S50, the CPU 76 sums up the detection values Sr of the detection units 100 (x = 1 to 24, y = 1 to 16) located in the area A. Next, in S51, the detection values: Sr of the detection unit 100 (x = 25 to 48, y = 1 to 16) located in the area B are summed.

  Then, in S52, the CPU 76 determines whether or not the sum of the detection values of the area A is equal to or more than the sum of the detection values of the area B. When the sum of the detection values of area A is equal to or greater than the sum of the detection values of area B (S52 = Yes), the user's upper body is assumed to be in area A, and in S53, cell 24 ( For X = 1 to 11, Y = 1 to 7), the cell drive valve 56 is opened and the air supply valve 62 and the pump 66 are driven to pressurize and expand them simultaneously. While opening, the exhaust valve 64 is opened, and these are simultaneously decompressed and contracted. On the other hand, if the sum of the detection values of area A is not equal to or greater than the sum of the detection values of area B (S52 = No), it is assumed that the user's upper body exists in area B, and in S54, cell 24 existing in area B (X = 11-21, Y = 1-7) are similarly expanded and contracted. The expansion and contraction of the cell 24 by these S53 and S54 is repeatedly performed until the alarm stop process (S10 in FIG. 10) described later is executed. Thereby, the cell 24 in which the upper body of the user exists is moved up and down, and the user's body is stimulated by stimulating the user's body. Thus, in this embodiment, the wake-up means is comprised including the cell 24, the pump apparatus 58, the control apparatus 74, the body pressure sensor 88, and S8.

  As shown in FIG. 10, after executing the wake-up process (S8), the CPU 76 sums up the detection values Sr of all the detection units 100 in S9, and the total value of the detection values: ΣSr is the mattress of the human body. 10 is executed to determine whether or not it is smaller than a predetermined value (15000 in the present embodiment) that is assumed to be detected when the number is 10 or more. Then, when the total value of detected values: ΣSr is 15000 or more, it is assumed that the user is still on the mattress 10, and the wake-up process (S8) is continued. On the other hand, when the total value of detected values: ΣSr is smaller than 15000 (S9 = Yes), it is assumed that the user has left the mattress 10, and in S10, as the wake-up end process, the previous wake-up process (S8). The driving of the driven cell driving valve 56, the air supply valve 62, the pump 66, and the exhaust valve 64 is stopped, and the wake-up process by the expansion and contraction of the cell 24 is finished. As described above, in the present embodiment, the body pressure sensor 88, the control device 74, and S9 are included, and the bed leaving detection means for detecting the user's bed leaving is configured, and the control device 74, the pump device 58, and Awakening stop means is configured including S10. As described above, the control process of the mattress 10 is completed.

  In the mattress 10 having the structure according to the present embodiment and its control method, the wake-up process (S8) is started when the user turns over in the turn-over detection process (S5). As described above, when the body motion of turning over is performed and the user is in an awake state, the user can be awakened comfortably. In particular, the wake-up process focuses on the size of body motion rather than the number of body motions, so there is no risk of false detection due to the effects of fine body motion, and the user wakes up at a more appropriate and accurate timing. Can be encouraged.

  Then, in the rollover detection step, the rollover is detected based on the movement of the central axis of the user's body: O, so that it is possible to eliminate local movements of the extremities and the rollover is a large body movement. Can be detected more reliably.

  Furthermore, since the user's turning is determined based on the detection value of the detection unit 100 provided in the body pressure sensor 88, there is no need to attach a special device such as an acceleration sensor to the user's body, and the user It is possible to detect turning over without restraining the body. Thereby, comfortable sleeping can be provided.

  Furthermore, in the alarming step (S8), by using the cell 24, the cell 24 can be expanded and contracted to directly stimulate the user's body. Thereby, compared with the aspect which act | operates an alarm or illumination, a user can give a stronger irritation | stimulation and can obtain a more effective alarm effect.

  Then, in the bed leaving detection step (S9), it is possible to automatically end the waking step (S8) by detecting the user's bed leaving based on the detection value of the body pressure sensor 88. Thereby, the user who has been awakened by the wake-up process (S8) can stop the operation of the wake-up process (S8) only by getting off the mattress 10 without requiring any special operation.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the specific method for detecting turning in the turning detection step (S5) is not limited to the method based on the displacement of the central axis of the body as in the above embodiment. For example, it can be assumed that the body pressure distribution obtained by the body pressure measuring means is in a supine position when the body pressure distribution is over a wide range, and that the body pressure distribution is lying down on the basis of such a change in body pressure distribution. May be determined.

  In addition, the operation mode of the cell in the wake-up step (S8) is merely an example, and the specific order of expansion and contraction and the speed of the cell are not limited at all. For example, the cell in which the user's upper body exists may be moved up and down so as to undulate by expanding and contracting in order from the head side to the waist side. The existing cell may be specified and only the cell having the head may be moved up and down. Further, as the time elapses, the amount of cell expansion may be increased, or the period of expansion and contraction may be shortened. Furthermore, the wake-up process (S8) is not limited to a process using cells. For example, an alarm or music may be sounded, a bed provided with a mattress or lighting provided in a room may be turned on, or a combination thereof may be used.

  Furthermore, the body pressure dispersion step (S3) is not necessarily an essential requirement in the present invention, but the specific operation mode of the body pressure dispersion step is not limited at all. For example, the pressure is reduced sequentially from the cell where a large body pressure is exerted, the user's head and buttocks are specified from the distribution of body pressure, the cell at a specific part is reduced, or a mattress is set in advance. Alternatively, the cells may be supplied / discharged so as to have a predetermined shape.

  Further, the number of cells and the number of measurement points provided in the body pressure measuring means are not limited at all. Further, the specific shape of the cell is merely an example, and various shapes can be appropriately adopted. For example, the cell is not a single bag shape as in the above-described embodiment, but is at least one constricted in the middle portion in the height direction, for example. It is also possible to adopt a two-stage or three-stage multi-stage shape in which a section is formed and narrowed at the constricted section. In the above embodiment, the body pressure sensor 88 as the body pressure measuring unit is divided into the three capacitance sensors 89a to 89c. However, the body pressure sensor 88 includes a single capacitance sensor. May be. In addition, as described above, the body pressure sensor 88 may be configured using, for example, a strain gauge, a magnetostrictive body, or the like, and is not limited to one using a capacitance.

  In the above embodiment, all 21 cell units 50 are commonly used with one air supply valve 62, pump 66, and exhaust valve 64 provided in the pump device 58. In addition, an air supply valve, a pump, or an exhaust valve may be provided for each cell unit 50 so that the cell units 50 can be operated simultaneously. Furthermore, instead of the cell driving valve 56 provided in each cell 24, an air supply valve, a pump, or an exhaust valve may be provided for each cell 24.

10: mattress, 24: cell, 28: bottom mat (body pressure acting surface), 42: fluid chamber, 56: cell drive valve (pressure adjusting means), 58: pump device (pressure adjusting means), 68: pressure gauge, 74: control device, 88: body pressure sensor (body pressure measuring means), 100: detector

Claims (5)

A plurality of cells are disposed on a body pressure acting surface of a base that supports a user's body, and pressure adjusting means for adjusting the pressure of a fluid chamber formed in the cell is provided, the pressure adjusting means In the mattress control method of changing the surface shape by expanding and contracting the cell using
While detecting the central axis of the user's body based on the measurement result of the body pressure measuring means for measuring the body pressure applied to the cell within the wake-up time that is a time range based on a preset wake-up time , A rollover detection step of detecting the rollover of the user based on the displacement of the central axis of the user's body ;
A mattress control method comprising: a waking step for inducing a user's awakening when the user's turning is detected in the turning detection step. The mattress control method according to claim 1, wherein in the waking step, the body of the user is stimulated by expanding and contracting the cell using the pressure adjusting means. A bed detection process for detecting the user's bed,
The mattress control method according to claim 1, further comprising: a wake-up end step of ending the wake-up step when the user's bed is detected in the bed-off detection step. A plurality of cells are disposed on a body pressure acting surface of a base that supports a user's body, and pressure adjusting means for adjusting the pressure of a fluid chamber formed in the cell is provided, the pressure adjusting means In a mattress that changes the surface shape by expanding and contracting the cell using
A body pressure measuring means for measuring the body pressure applied to the front SL cells,
A rolling detection means for detecting the center axis of the user's body based on the measurement result of the body pressure measuring means and detecting the user 's rolling based on a displacement of the center axis of the user's body ;
Awakening means for inducing awakening of the user when the turnover detecting means detects that the user has turned over within a wakeup time that is a time range based on a preset wake-up time. Mattress characterized by that. The mattress according to claim 4 , wherein the wake-up means stimulates the user's body by expanding and contracting the cell using the pressure adjusting means.

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