control device

Abstract

To provide a control device for providing a comfortable air mattress.SOLUTION: When an input is received or when a predetermined time comes, a control device can perform a first operation to allow inner pressure of at least ones of multiple air cells to be a first value, and can perform a second operation to allow inner pressure of at least ones of the multiple air cells to be a second value lower than the first value after performance of the first operation.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a control device. [Background technology]

[0002] There is an air mattress that uses air cells. The air mattress is controlled by a control device. In an air mattress, more comfort is desired. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-29960 Summary of the Invention [Problem to be solved by the invention]

[0004] Embodiments of the present invention provide a control system that can provide a more comfortable air mattress. [Means for solving the problem]

[0005] According to an embodiment, the control device is capable of performing a first operation of setting the internal pressure of at least one of a plurality of air cells to a first value when it receives an input or at a predetermined time, and a second operation of setting the internal pressure of at least one of the plurality of air cells to a second value lower than the first value after the first operation. [Effects of the Invention]

[0006] Embodiments of the present invention can provide a control system that can provide a more comfortable air mattress. [Brief explanation of the drawings]

[0007] [Figure 1] 1(a) to 1(d) are schematic views illustrating an air mattress and a control device according to the first embodiment. [Figure 2] FIG. 2 is a schematic view illustrating the operation of the air mattress and the control device according to the first embodiment. [Figure 3] 3(a) to 3(g) are schematic views illustrating the operation of the air mattress and the control device according to the first embodiment. [Figure 4] 4(a) and 4(b) are schematic diagrams illustrating the air mattress and the control device according to the embodiment in use. [Figure 5] 5(a) to 5(d) are schematic diagrams illustrating an air mattress and a control device according to the embodiment. [Figure 6] 6(a) and 6(b) are schematic views illustrating the operation of the air mattress according to the embodiment. [Figure 7] FIG. 7 is a graph illustrating the operation of an air mattress according to an embodiment. [Figure 8] FIG. 8 is a flowchart illustrating the operation of the air mattress according to the embodiment. [Figure 9] FIG. 9 is a schematic perspective view illustrating a bed portion to be combined with the air mattress according to the embodiment. [Figure 10] FIG. 10 is a block diagram illustrating an example of electric furniture in which an air mattress according to the embodiment is used. [Figure 11] FIG. 11 is a flowchart illustrating the operation of the air mattress according to the embodiment. [Figure 12] FIG. 12 is a flowchart illustrating the operation of the air mattress according to the embodiment. [Figure 13] FIG. 13 is a flow chart illustrating the operation of the air mattress and the control device according to the embodiment. [Figure 14] FIG. 14 is a flow chart illustrating the operation of the air mattress and the control device according to the embodiment. [Figure 15] FIG. 15 is a flow chart illustrating the operation of the air mattress and the control device according to the embodiment. [Figure 16]FIG. 16 is a flow chart illustrating the operation of the air mattress and control device according to the embodiment. [Figure 17] FIG. 17 is a flow chart illustrating the operation of the air mattress and the control device according to the embodiment. [Figure 18] FIG. 18 is a flow chart illustrating the operation of the air mattress and the control device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between parts, etc. are not necessarily the same as those in reality. Even when the same part is shown, the dimensions and ratios may be different depending on the drawing. In this specification and in each drawing, elements similar to those previously described with reference to the previous drawings are designated by the same reference numerals, and detailed descriptions thereof will be omitted where appropriate.

[0009] (First embodiment) 1(a) to 1(d) are schematic views illustrating an air mattress and a control device according to the first embodiment. FIG. 1(a) is a perspective view illustrating multiple elements included in an air mattress 110 according to an embodiment. In FIG. 1(a), multiple elements are depicted separated from one another for easier viewing. FIG. 1(b) is a cross-sectional view of a portion of the air mattress 110. FIG. 1(c) is a plan view illustrating a receiving unit 60 of the air mattress 110. FIG. 1(d) is a functional block diagram of the air mattress 110.

[0010] As shown in Figure 1(a), an air mattress 110 according to an embodiment includes a plurality of air cells 11. As shown in Figure 1(d), the air mattress 110 includes a control device 70. In one example, the control device 70 includes a control unit 72.

[0011] 1(a), the plurality of air cells 11 are included in the air cell section 10. The plurality of air cells 11 are, for example, cylindrical.

[0012] The air cells 11 are arranged along a first direction. The first direction is defined as the X-axis direction. A direction perpendicular to the X-axis direction is defined as the Z-axis direction. A direction perpendicular to the X-axis direction and the Z-axis direction is defined as the Y-axis direction.

[0013] The first direction corresponds to, for example, the direction from head to feet when a user lies on the air mattress 110. The Y-axis direction corresponds to the left-right direction. The Z-axis direction corresponds to the direction from the bottom surface to the top surface of the air mattress 110.

[0014] As shown in FIGS. 1(a) and 1(b), in this example, an upper-layer cushion portion 40 is provided above the air cell portion 10 (above the air cell 11). In the Y-axis direction, the air cell portion 10 is provided between the first side edge portion 21 and the second side edge portion 22. The upper-layer cushion portion 40, the first side edge portion 21, and the second side edge portion 22 include, for example, a polymer foam. The polymer foam includes, for example, urethane foam. The polymer foam includes a plurality of pores.

[0015] 1(a), in the Z-axis direction (vertical direction), the air cell portion 10, the upper-layer cushion portion 40, the first side edge portion 21, and the second side edge portion 22 are provided between the top cover 45U and the bottom cover 45L. In one example, the top cover 45U and the bottom cover 45L include a material such as polyester. These covers are connected by a fastener 45Uf of the top cover 45U and a fastener 45Lf of the bottom cover 45L.

[0016] 1(a), the air mattress 110 further includes a pump unit 31. The pump unit 31 is connected to each of the plurality of air cells 11 via a tube 11p. The pump unit 31 supplies and exhausts air to and from the plurality of air cells 11.

[0017] In the example shown in FIG. 1(a), a control unit 72 is provided in the housing of the pump unit 31. The control unit 72 may include, for example, a processor. The control device 70 (or the control unit 72) may be provided in a location separate from the housing. As will be described later, the control device 70 may be a smartphone type (for example, a mobile terminal type).

[0018] As shown in FIG. 1(d), the control unit 72 is connected to the pump unit 31. The connection (e.g., communication) between the control unit 72 and the pump unit 31 can be made by any method, such as wired or wireless. The control unit 72 controls the pump unit 31. The internal pressure of the multiple air cells 11 is controlled by the operation of the pump unit 31.

[0019] In the embodiment, the "internal pressure" corresponds to the difference from atmospheric pressure. For example, the "internal pressure" corresponds to the "gauge pressure."

[0020] 1(d), for example, a pressure sensor 31s may be provided. For example, the pressure sensor 31s can detect the internal pressure of the plurality of air cells 11. In one example, the internal pressure of each of the plurality of air cells 11 can be detected by detecting the internal pressure of a tube 11p connected to each of the plurality of air cells 11.

[0021] As shown in FIG. 1(d), a signal SS detected by the pressure sensor 31s is supplied to the control unit 72. For example, the control unit 72 may control the internal pressure to a desired state based on the detected internal pressure. A fluctuation ΔS of the signal SS may be supplied to the control unit 72. The fluctuation ΔS may include at least one of a change in the magnitude of the signal SS and a change in the signal SS over time. For example, when the change in the signal SS per unit time is large, the fluctuation ΔS is large.

[0022] As shown in FIGS. 1(a) and 1(d), the air mattress 110 may further include a receiving unit 60. The receiving unit 60 receives input from the user. The receiving unit 60 is, for example, an operation switch (e.g., a remote controller). The control unit 72 controls the internal pressure of the multiple air cells 11 in accordance with the input received by the receiving unit 60. The receiving unit 60 is connected to the control unit 72 (or the pump unit 31) by any method, such as wired or wireless. In this example, the receiving unit 60 is connected to the control unit 72 (or the pump unit 31) by a cable 68.

[0023] 1(c), for example, various buttons (display input units 63a, 63b, and 64a to 64f, etc.) are provided on the reception unit 60. For example, in the "normal mode," the user operates these buttons to control the internal pressure of each of the plurality of air cells 11.

[0024] In one example, when the user operates the display input unit 63a, the internal pressure of all of the plurality of air cells 11 decreases. When the user operates the display input unit 63b, the internal pressure of all of the plurality of air cells 11 increases.

[0025] For example, the user presses one of the display input sections 64a to 64f (e.g., a button). This selects the air cell block ("A" to "F") corresponding to the display input section 64a to 64f. In this state, the user presses the display input section 63a or 63b, which decreases or increases the internal pressure of the selected air cell block.

[0026] 1(c), a display unit 63D may be provided in the reception unit 60. A value corresponding to the internal pressure may be displayed on the display unit 63D.

[0027] As shown in FIG. 1(d), a memory unit 78 may be provided. The memory unit 78 may store the internal pressure desired by the user. The control unit 72 may control the internal pressure of the plurality of air cells 11 based on the data stored in the memory unit 78. The data may include changes in the internal pressure over time. The control unit 72 may control the internal pressure of each of the plurality of air cells 11 (multiple blocks) so that it changes over time.

[0028] As shown in FIG. 1(c), the receiving unit 60 may be provided with an input receiving unit 65. The input receiving unit 65 is, for example, an operation button. When the user operates the input receiving unit 65, the air mattress 110 may transition to a "sleep mode" described below.

[0029] An input function may be provided in the control device 70 (or the control unit 72). In this case, the user may operate the control device 70 (or the control unit 72) to cause the air mattress 110 to transition to the "sleep mode."

[0030] For example, the air mattress 110 may have a "first mode" and a "second mode." The "first mode" corresponds to the above-mentioned "normal mode" or "manual mode." In the "first mode," for example, the user operates the receiving unit 60, and the internal pressure of the air cell 11 is controlled to a state corresponding to the operation.

[0031] On the other hand, in the "second mode," the internal pressure of the air cell 11 is controlled by the control device 70 (or the control unit 72) without any operation. The "second mode" is, for example, an "automatic mode." The "second mode" may also be, for example, a "sleep mode."

[0032] An example of the "second mode" will be described below. The "second mode" is one example of an operation mode of the control unit 72. The operation of the control unit 72 described below may be performed by the control device 70. The communication with the control unit 72 (such as data exchange) described below may also be applied to communication with the control device 70 (such as data exchange).

[0033] FIG. 2 is a schematic view illustrating the operation of the air mattress and the control device according to the first embodiment. 2, the "second mode" starts in the control unit 72 (step S10). For example, the "second mode" starts when the control unit 72 receives an input or when a predetermined time arrives.

[0034] In one example, the input receiving unit 65 of the receiving unit 60 may receive input, and "information that the receiving unit 60 has received the input" may be supplied to the control unit 72. This information becomes the input to the control unit 72. In another example, the control unit 72 has an input function, and the user operates the control unit 72. This operation becomes the input to the control device 70 (or the control unit 72).

[0035] 2, the "second mode" includes a first operation (step S11) and a second operation (step S12). In the first operation, the control unit 72 sets the internal pressure of the plurality of air cells 11 to a high state. In the second operation, the control unit 72 sets the internal pressure of the plurality of air cells 11 to a low state.

[0036] Thus, in the first operation, when the control unit 72 receives an input or when a predetermined time arrives, the control unit 72 sets the internal pressure of at least one of the multiple air cells 11 to a first value (step S11).

[0037] After the first operation, the second operation is performed. In the second operation, the control unit 72 sets the internal pressure of at least one of the plurality of air cells 11 to a second value. The second value is lower than the first value.

[0038] Thereafter, the control unit 72 determines whether or not the first condition is satisfied (step S13). If the first condition is not satisfied, the process returns to step S11. If the first condition is satisfied, the process ends.

[0039] In step S13, the first condition includes at least one of the following: the elapsed time t1 is equal to or greater than a predetermined time tc; the number of repetitions Nm is equal to or greater than a predetermined number Nc; and the fluctuation ΔS of the obtained signal SS is equal to or greater than a predetermined threshold value Sc.

[0040] The signal SS may include information regarding the state of the internal pressure of at least one of the plurality of air cells 11. For example, the signal SS related to the internal pressure of the plurality of air cells 11 is detected by a pressure sensor 31s (see FIG. 1(d)). The signal SS or a variation ΔS of the signal SS may be supplied to the control unit 72.

[0041] For example, the internal pressure of the air cell 11 changes depending on the user's movement. When the variation ΔS of the signal SS is small, for example, the user's body movement is small. For example, when the body movement increases, the repetition of the first and second actions ends. For example, when the user moves away from the air mattress 110, the signal SS changes significantly. By detecting the variation ΔS of the signal SS, it is possible to detect whether the user has left the bed. For example, when the user has left the bed, the repetition of the first and second actions may end.

[0042] For example, the control unit 72 repeats the first operation and the second operation until such a first condition is satisfied.

[0043] In the first movement, the internal pressure is high. By performing such a first movement, for example, a stretching effect can be obtained. In the second movement, the internal pressure is low. By performing such a second movement, a relaxing effect can be obtained. For example, it becomes easier to fall asleep. For example, the quality of sleep improves. For example, lower back pain is alleviated. For example, sleep apnea syndrome is improved.

[0044] An example of the first operation will be described below. 3(a) to 3(g) are schematic views illustrating the operation of the air mattress and the control device according to the first embodiment. As shown in Fig. 3(a), the air cell unit 10 (plurality of air cells 11) may be divided into a plurality of blocks and controlled. In this example, the plurality of air cells 11 are divided into a head block 11A, a shoulder block 11B, a waist block 11C, a buttocks block 11D, an upper leg block 11E, and a lower leg block 11F. The number of the plurality of blocks is an arbitrary integer of 2 or more.

[0045] When a user 81 lies on the multiple air cells 11, the head block 11A, shoulder block 11B, waist block 11C, buttocks block 11D, upper leg block 11E, and lower leg block 11F correspond to the head, shoulders, waist, buttocks, upper leg, and lower leg of the user 81, respectively.

[0046] In this example, each of the plurality of blocks includes a plurality of air cells 11. There may be a case where the number of air cells 11 included in one of the plurality of blocks is one.

[0047] The control unit 72 may be capable of independently controlling the internal pressure of a portion (one block) of the plurality of air cells 11 and the internal pressure of another portion (another block) of the plurality of air cells 11.

[0048] For example, the control unit 72 can independently control the internal pressure of each of the head block 11A, shoulder block 11B, waist block 11C, buttocks block 11D, upper leg block 11E, and lower leg block 11F.

[0049] As already explained, for example, display input units 64a to 64f corresponding to "A," "B," "C," "D," "E," and "F," respectively, may be provided on the operation surface of the reception unit 60 (see FIG. 1(c)). "A," "B," "C," "D," "E," and "F" correspond to the head block 11A, shoulder block 11B, waist block 11C, buttocks block 11D, upper leg block 11E, and lower leg block 11F, respectively.

[0050] 3(a) to 3(g), the density of the hatching of the figures of the plurality of air cells 11 corresponds to the level of the internal pressure. When the hatching of the figure is dense, the internal pressure is high. When the hatching of the figure is thin, the internal pressure is low.

[0051] As shown in FIG. 3(a), in the initial state, the internal pressure of each of the head block 11A, shoulder block 11B, buttocks block 11D, and lower leg block 11F is medium. In the initial state, the internal pressure of each of the waist block 11C and upper leg block 11E is low. FIG. 3(a) corresponds to the state before step S10 (see FIG. 2). In the initial state, the internal pressure of each of the head block 11A, shoulder block 11B, buttocks block 11D, and lower leg block 11F is, for example, 4 kPa. In the initial state, the internal pressure of each of the waist block 11C and upper leg block 11E is, for example, 3 kPa.

[0052] 3(b), the control unit 72 increases the internal pressure of the head block 11A. For example, the control unit 72 increases the internal pressure of the head block 11A to, for example, about 8 kPa.

[0053] 3(c), the control unit 72 increases the internal pressure of the shoulder block 11B to a value higher than the initial value, for example, about 8 kPa.

[0054] 3(d), the control unit 72 then increases the internal pressure of the lumbar block 11C to a value higher than the initial value, for example, about 7 kPa.

[0055] 3(e), the control unit 72 increases the internal pressure of the buttocks block 11D to a value higher than the initial value, for example, about 8 kPa.

[0056] 3(f), the control unit 72 increases the internal pressure of the upper thigh block 11E to a value higher than the initial value. For example, the control unit 72 increases the internal pressure of the upper thigh block 11E to approximately 7 kPa.

[0057] 3(g), the control unit 72 increases the internal pressure of the lower leg block 11F to a value higher than the initial value. For example, the control unit 72 increases the internal pressure of the lower leg block 11F to about 8 kPa.

[0058] The above operation corresponds to, for example, operation 1. In this example, the internal pressures of the head block 11A, shoulder block 11B, waist block 11C, buttocks block 11D, upper leg block 11E, and lower leg block 11F are controlled to be higher than the initial state in this order.

[0059] In the second operation, for example, the internal pressures of the head block 11A, shoulder block 11B, waist block 11C, buttocks block 11D, upper leg block 11E, and lower leg block 11F are returned to the initial state in this order.

[0060] For example, the internal pressure of at least one of the head block 11A and the shoulder block 11B may increase in the first action, and then the internal pressure of at least one of the head block 11A and the shoulder block 11B may decrease in the second action.

[0061] Thus, in the embodiment, the control unit 72 sets the internal pressure of at least one of the plurality of air cells 11 (e.g., air cells 11 included in at least one of the head block 11A and the shoulder block 11B) to a first value in the first operation. In one example, the first value is, for example, 8 kPa. In the second operation performed after such a first operation, the control unit 72 sets the internal pressure of at least one of the plurality of air cells 11 to a second value lower than the first value.

[0062] For example, the plurality of air cells 11 may include a first air cell and a second air cell. The first air cell is, for example, a head block 11A. The second air cell is, for example, a waist block 11C.

[0063] In the first operation, the control unit 72 sets the first air cell internal pressure of the first air cell (head block 11A) to a first value, and then sets the second air cell internal pressure of the second air cell (waist block 11C) to a third value.

[0064] In the second operation, the control unit sets the first air cell internal pressure to a second value lower than the first value, and then sets the second air cell internal pressure to a fourth value lower than the third value.

[0065] The third value may be the same as or different from the first value, and the fourth value may be the same as or different from the second value.

[0066] The plurality of air cells 11 may further include a third air cell. In this case, the third air cell is, for example, a shoulder block 11B. The third air cell is located between the first air cell and the second air cell.

[0067] In the first operation, the control unit 72 may set the third air cell internal pressure of the third air cell to a fifth value between setting the first air cell internal pressure of the first air cell to a first value and setting the second air cell internal pressure of the second air cell to a third value.

[0068] In this case, in the second operation, the control unit may set the internal pressure of the third air cell to a sixth value lower than the fifth value between setting the internal pressure of the first air cell to the second value and setting the internal pressure of the second air cell to the fourth value.

[0069] The fifth value may be the same as or different from the first value, and the sixth value may be the same as or different from the second value.

[0070] In this way, in the first operation, the control unit 72 may sequentially control the internal pressure of a plurality of air cell blocks including a plurality of air cells 11. In the second operation, the control unit 72 may sequentially control the internal pressure of a plurality of air cell blocks.

[0071] Regarding the first condition, the comparison between the elapsed time t1 and the time tc (step S13 in FIG. 2) is performed, for example, by the control unit 72. The comparison between the number of repetitions Nm and the predetermined number of repetitions Nc (step S13 in FIG. 2) is performed, for example, by the control unit 72. The comparison between the fluctuation ΔS of the signal SS and the threshold value Sc (step S13 in FIG. 2) is performed, for example, by the control unit 72.

[0072] In the above example, the signal SS is obtained from the pressure sensor 31s. The pressure sensor 31s is provided in an air path between at least one of the plurality of air cells 11 and the pump unit 31 that supplies and exhausts air to at least one of the plurality of air cells 11. The air path includes, for example, a tube 11p.

[0073] In the first embodiment, information regarding changes in body movement may be obtained from changes in the internal pressure of the plurality of air cells 11. For example, the sleep state of the user 81 can be estimated from the changes in internal pressure. The sleep state may include whether the user 81 is out of bed.

[0074] In the embodiment, for example, the internal pressure of the air cells corresponding to the head and shoulders is set to about 8 kPa (first operation), and then set to about 1 kPa (second operation). Such first and second operations may correspond to, for example, a "sleep mode."

[0075] Thereafter, the control unit 72 may further perform an operation (for example, a third operation) to increase the internal pressure of the plurality of air cells 11 based on, for example, information relating to time or changes in body movement, etc. This makes it easier for the user 81 to turn over in their sleep.

[0076] Furthermore, an operation (for example, a fourth operation) for increasing the internal pressure of the plurality of air cells 11 may be further performed based on information relating to time or changes in body movement. The fourth operation corresponds to, for example, an operation performed when waking up. In the fourth operation, the user 81 is likely to wake up.

[0077] (Second embodiment) In the second embodiment, the signal is obtained by another sensor 62 (see FIG. 1(d)). The other sensor 62 detects a value corresponding to the movement of a user 81 lying on the air cell unit 10. The signal SS obtained by the sensor 62 is supplied to the control device 70 or the control unit 72. Alternatively, a variation ΔS in the signal SS may be supplied to the control device 70 or the control unit 72.

[0078] An example of such a sensor 62 will now be described.

[0079] 4(a) and 4(b) are schematic diagrams illustrating the air mattress and the control device according to the embodiment in use. Fig. 4(a) is a schematic perspective view illustrating the sensor 62 and the arrangement of the sensor 62. Fig. 4(b) is a schematic plan view illustrating the sensor 62. In Fig. 4(a), components are drawn separated from each other for ease of viewing.

[0080] As shown in FIG. 4(a), in the electrically powered furniture 340, a bottom 71 is provided on the bed leg portion 74 of the bed portion 70B. An air mattress 110 is provided on the bottom 71. A user 81 lies on the air mattress 110. In this example, the sensor 62 is provided, for example, between the bottom 71 and the air mattress 110. In this example, the sensor 62 is sheet-shaped or plate-shaped.

[0081] As shown in Fig. 4(b), the sensor 62 includes a circuit unit 62a and a pressure sensor unit 62b. The circuit unit 62a includes a sensor communication unit 62c. The sensor communication unit 62c transmits and receives data to and from, for example, the control device 70 or the control unit 72 (see Fig. 1(d)). The transmission and reception is performed by any method including at least one of wired and wireless communication.

[0082] The pressure sensor unit 62b includes, for example, a sensor device 62d. The pressure sensor unit 62b detects a force (or a characteristic corresponding to the force) applied to the pressure sensor unit 62b. The force includes, for example, at least one of pressure and sound waves. The pressure sensor unit 62b includes, for example, a microphone.

[0083] A force (at least one of pressure and sound waves) is applied by the user 81 to the pressure sensor unit 62b via the air mattress 110. For example, a signal based on the force detected by the pressure sensor unit 62b is output from the circuit unit 62a. The output signal is supplied to the control device 70, the control unit 72, or the like. The control device 70, the control unit 72, or the like estimates the state of the user 81 (getting out of bed, sleeping, awake, etc.) based on at least one of the magnitude of the signal (force) and a temporal change in the magnitude of the signal (force). Alternatively, the circuit unit 62a may estimate the state of the user 81 (getting out of bed, sleeping, awake, etc.) based on at least one of the force detected by the pressure sensor unit 62b and a temporal change in the force. The state of the user 81 may include sitting up, preparing to get out of bed (e.g., sitting on the edge of bed), getting out of bed, falling asleep, sleeping, or awake.

[0084] Furthermore, at least one of the control device 70, the control unit 72, and the circuit unit 62a detects a biosignal of the user 81 based on at least one of the magnitude of the signal (force) and the temporal change in the magnitude of the signal (force). The biosignal includes at least one of the respiratory rate and the heart rate of the user 81. The sleep state may be estimated based on the biosignal. The posture of the user 81 while sleeping may be estimated based on the biosignal.

[0085] For example, vibrations corresponding to the state of the user 81 are applied to the pressure sensor unit 62b. The vibrations correspond to, for example, the body movement of the user 81. The vibrations are detected by the pressure sensor unit 62b. The vibrations may include sound.

[0086] For example, the device includes a vibration detection means (pressure sensor unit 62b) and a processing unit (at least a part of at least one of the circuit unit 62a, the control device 70, and the control unit 72). The processing unit includes, for example, a computer. The vibration detection means detects, for example, vibrations of a sleeping person (user 81) on bedding (bed unit 70B). The processing unit includes, for example, an activity amount calculation means, a sleep determination value calculation means, and a sleep state determination means. These means are functionally separated. For example, the activity amount calculation means calculates the activity amount of the sleeping person for each sampling unit time based on the vibrations detected by the vibration detection means. For example, the sleep determination value calculation means calculates, as the sleep determination value, the sum of values ​​obtained by multiplying the activity amount at a first time (e.g., the current time) and the activity amount calculated at a second time (e.g., a time before the current time) by a correction coefficient weighted according to time. The sleep state determination means, for example, determines the user to be in an awake state when the sleep determination value exceeds a predetermined threshold, and determines the user to be in a sleeping state otherwise.

[0087] 5(a) to 5(d) are schematic diagrams illustrating an air mattress and a control device according to the embodiment. Fig. 5(a) is a cross-sectional view of an example of the sensor 62. Fig. 5(b) is a plan view of an example of the sensor 62. Fig. 5(c) is a perspective view illustrating the arrangement of the sensor 62. Fig. 5(d) is a side view illustrating the arrangement of the sensor 62.

[0088] 5(a), in this example, the sensor 62 includes a first plate 62p and a second plate 62q. The second plate 62q faces the first plate 62p. These plates may be sheet-shaped.

[0089] The second plate 62q includes a support protrusion 62s. The support protrusion 62s faces the outer edge of the first plate 62p. The first plate 62p includes an inner portion inside the outer edge. An air container 62r is provided between the inner portion and the second plate 62q. In this example, a groove 62t is provided in the second plate 62q. The air container 62r is provided in a space (a divided space) formed by the groove 62t. One end of a signal line 62u is connected to the air container 62r. ​​The other end of the signal line 62u is connected to a detection circuit 62v (a detection device).

[0090] 5(b), the support protrusions 62s face parts of the outer edge of the first plate 62p. In this example, the support protrusions 62s are provided at the four corners of the first plate 62p. The sensor 62 is sheet-shaped or plate-shaped.

[0091] As shown in Fig. 5(c), the sensor 62 is placed on the bottom 71. As shown in Fig. 5(d), the sensor 62 is placed on the bottom 71, and an air mattress 110 is placed on top of that. A user 81 lies on the air mattress 110.

[0092] For example, a force corresponding to the body movement of the user 81 is applied to the air container 62r. ​​This force includes, for example, vibration. The force (or a characteristic corresponding to the force) applied to the air container 62r is detected by the detection circuit 62v. For example, a pressure detector may be provided in the air container 62r, and a signal (detection result) obtained by the pressure detector may be supplied to the detection circuit 62v. For example, a microphone may be provided in the air container 62r, and a signal (detection result) obtained by the microphone may be supplied to the detection circuit 62v. For example, an output (signal) of the detection circuit 62v may be supplied to the control device 70 (or the control unit 72). The detection circuit 62v, the control device 70, or the control unit 72 may estimate the state of the user 81 (e.g., getting out of bed, sleeping, awake, etc.). Alternatively, the detection circuit 62v, the control device 70, or the control unit 72 may estimate the state of the user 81 (e.g., getting out of bed, sleeping, awake, etc.) based on at least one of the detected force and a temporal change in the force. The state of the user 81 may include sitting up, sitting on the edge of the bed (e.g., preparing to get out of bed), getting out of bed, falling asleep, sleeping, or awake.

[0093] The sensor 62 is, for example, a biometric information collection device. In the sensor 62, the first plate 62p is, for example, disposed on the body side of the user 81. The second plate 62q is, for example, provided on the support side. A deformable air container 62r for detecting air pressure is provided between the centers of the first plate 62p and the second plate 62q. A groove 62t for attaching the air container 62r is provided in the center of the second plate 62q. The support protrusions 62s protrude from the second plate 62q toward the first plate 62p. The support protrusions 62s support the four corners around the first plate 62p. The support protrusions 62s support the first plate 62p in a horizontal state (normal state), for example.

[0094] The first and second operations may be started or ended according to the signal SS (or ΔS of the signal SS) obtained by such a sensor 62.

[0095] In the second embodiment, the control device 70 (or the control unit 72) may further perform the third or fourth operation described in relation to the first embodiment.

[0096] (Third embodiment) The third embodiment relates to an air mattress. The air mattress 110 includes the control device 70 described in relation to the first and second embodiments and a plurality of air cells 11. According to the third embodiment, a more comfortable air mattress can be provided.

[0097] The purpose of a typical air mattress is to reduce the pressure on the user's body, but it is difficult to improve the comfort of sleeping with a typical air mattress.

[0098] In the embodiment, at least some of the air cells 11 are hardened to allow the user 81 to stretch. Then, at least some of the air cells 11 are softened to allow the user 81 to sink. This produces a relaxing effect. For example, the hardness (internal pressure) of the air cells 11 is controlled based on a signal SS (and a fluctuation ΔS in the signal SS) obtained from an internal sensor (pressure sensor 31s) or an external device (e.g., sensor 62). The signal SS and the fluctuation ΔS may indicate, for example, the state of the user 81 (e.g., falling asleep or getting out of bed). The hardness (internal pressure) of the air cells 11 may be controlled based on a detection result of at least one value selected from the group consisting of temperature, humidity, time, brightness, noise, odor, vibration, weight, blood flow, heart rate, respiration, body temperature, and sinking degree.

[0099] The control device 70 may include, for example, a smartphone. The hardness (internal pressure) of the plurality of air cells 11 may be controlled by application software of the control device 70 (for example, a smartphone). The hardness (internal pressure) of the plurality of air cells 11 may be controlled according to big data on the cloud.

[0100] As shown in FIG. 1(d), the control device 70 may include, for example, a wireless communication terminal 73. The wireless communication terminal 73 may be, for example, a smartphone. The wireless communication terminal 73 may include an input / output screen 73d. The input / output screen 73d includes, for example, a "touch panel." When the user 81 or the like operates the input / output screen 73d, for example, the air mattress 110 transitions to a "sleep mode." The input / output screen 73d functions, for example, as an "input receiving unit."

[0101] A communication unit 73c may be provided in the wireless communication terminal 73. The communication unit 73c may, for example, wirelessly communicate with the pump unit 31. For example, the communication unit 73c may wirelessly communicate with the pressure sensor 31s. The communication unit 73c may wirelessly communicate with the sensor communication unit 62c of the sensor 62 (a sensor that detects values ​​according to the movement of the user 81 lying on the air cell unit 10).

[0102] In one example, the communication unit 73c communicates wirelessly with the sensor communication unit 62c, and the sensor communication unit 62c communicates with the pump unit 31. The pump unit 31 may be controlled based on the output from the communication unit 73c via the sensor communication unit 62c.

[0103] The control unit 72 may include a communication unit 72c. The communication unit 73c may be capable of performing wired or wireless communication with the communication unit 72c.

[0104] In the embodiment, the pump unit 31 may include a DC pump 31d (see FIG. 1(d)). By using the DC pump 31d, for example, PWM (Pulse Width Modulation) control may be performed. An example of PWM control will be described below.

[0105] 6(a) and 6(b) are schematic views illustrating the operation of the air mattress according to the embodiment. The horizontal axis in these figures represents time tm. The vertical axis illustrates the strength SigC of the PWM control signal. FIG. 6(a) corresponds to a case where the duty ratio Dt is 65%. FIG. 6(b) corresponds to a case where the duty ratio Dt is 35%. The PWM control signal is supplied to the DC pump 31d, for example, from the control unit 72 or a drive circuit controlled by the control unit 72. The amount of air supply and exhaust to and from the air cell 11 by the DC pump 31d can be controlled by the ratio between the period when the strength SigC of the PWM control signal is high and the period when the strength SigC is low.

[0106] FIG. 7 is a graph illustrating the operation of an air mattress according to an embodiment. The horizontal axis in Figure 7 is the duty ratio Dt (%). The vertical axis is the supply and exhaust pressure Pr (kPa). As shown in Figure 7, when the duty ratio Dt is high, the supply and exhaust pressure Pr becomes high. By controlling the duty ratio Dt in PWM control, the supply and exhaust volume of the pump can be controlled.

[0107] In the embodiment, the pump unit 31 may include an AC pump. The internal pressure of the air cell 11 can be controlled by the operation of the AC pump. In this case, the output of the AC pump (e.g., the supply / exhaust pressure Pr) is controlled by, for example, the voltage applied to the AC pump. In the AC pump, the applied voltage can be switched by phase control. In phase control, the desired operation may be difficult to achieve due to the influence of frequency variations.

[0108] By using PWM control with a DC pump, for example, it is possible to precisely control the output according to the required supply and exhaust pressure without being substantially affected by fluctuations in the AC power supply (including, for example, frequency variations). For example, it is possible to minimize the output. By using PWM control with a DC pump, for example, it is possible to reduce the noise generated compared to when an AC pump is used. For example, it is possible to minimize the noise generated. This, for example, can provide a better sleeping comfort.

[0109] An example of the operation of the air mattress 110 will now be described. FIG. 8 is a flowchart illustrating the operation of the air mattress according to the embodiment. As shown in FIG. 8, the power is turned on (step S101). This causes a transition to, for example, an initialization mode (step S102). In the initialization mode, for example, the internal pressure (pressure Pr) of the air cell 11 is set to a predetermined value (for example, 5 kPa). In the initialization mode, the user 81 stands on the air cell portion 10. For example, in this state, the internal pressure (pressure Pr) is set to a predetermined value.

[0110] The mode transitions to the normal mode (step S103). For example, the mode transitions to the sleep mode (step S131) ​​based on the state of the user 81 or based on the acceptance of an operation by the acceptance unit 60. In the sleep mode (step S131), the mode returns to the normal mode (step S103) based on the acceptance of an "end" operation, based on the state of the user 81, or based on the acceptance of an operation by the acceptance unit 60. The sleep mode (step S131) ​​corresponds to, for example, the above-mentioned "second mode."

[0111] In normal mode, for example, a sensor check is performed (step S104). The internal pressure is confirmed (detected) (step S105). Furthermore, it is determined whether the state set (stored) at this time is "out of bed" or "lying down" (step S106). The "set (stored) state" is, for example, the state at the end of the previous operation (for example, step S111 described later). For example, the initially set (stored) state of the air mattress 110 may be, for example, "lying down". If the state is "out of bed" in step S106, the process proceeds to step S121 described later. If the state is "lying down", the process proceeds to step S107.

[0112] In step S107, it is determined whether the internal pressure has dropped significantly. If it is determined that the internal pressure has dropped significantly, it is considered to be "bed exit" and the internal pressure at that time is stored as "bed exit internal pressure" (step S109). After this, the system waits for a predetermined time (for example, 12 hours) (step S111).

[0113] If it is determined in step S107 that the internal pressure has not decreased significantly, it is determined whether the internal pressure has decreased (step S108). If it is determined that the internal pressure has not decreased, the process proceeds to step S111.

[0114] If it is determined in step S108 that the internal pressure has dropped, air is supplied up to the set internal pressure (step S110), after which the process proceeds to step S111.

[0115] If it is determined in step S106 that the patient has "left the bed," it is determined in step S121 whether the internal pressure has decreased. If it is determined that the internal pressure has not decreased, it is determined whether the internal pressure has increased (step S122). If it is determined that the internal pressure has not increased, the process proceeds to step S111. If it is determined that the internal pressure has increased, the patient is considered to be "lying in bed," and the "left the bed internal pressure" is cleared (step S124, for example, memory is initialized). Thereafter, the process proceeds to step S111.

[0116] If it is determined in step S121 that the internal pressure has decreased, air is supplied up to the "bed exit internal pressure" (step S123). After this, the process proceeds to step S111.

[0117] Such an operation is performed by, for example, the control device 70 (or the control unit 72).

[0118] FIG. 9 is a schematic perspective view illustrating a bed portion to be combined with the air mattress according to the embodiment. The air mattress 110 according to the embodiment may be used in combination with a bed section 70B shown in FIG. 9 (see FIG. 4(a)). As shown in FIG. 9, the bed section 70B includes, for example, a plurality of bottom sections 71. The plurality of bottom sections include, for example, a back section, a hip section, an upper leg section, and a lower leg section. The angle between these bottom sections can be changed, for example, by actuators (for example, a back actuator 71A and a knee actuator 71B). The bed section 70B is, for example, an "active smart bed."

[0119] FIG. 10 is a block diagram illustrating an example of electric furniture in which an air mattress according to the embodiment is used. As shown in Fig. 10, the electrically powered furniture 310 includes an air mattress 110 and a bed section 70B. In this example, a sensor 62 (see Figs. 4(a) and 5(c)) and a wireless communication terminal 73 (e.g., a smartphone) are provided. The wireless communication terminal 73 may include, for example, any device on which an APP (Application software) runs.

[0120] In this example, the electric furniture 310 (or the bed section 70B) includes a control circuit 75 (control box). The control circuit 75 controls the actuators of the bed section 70B. The control circuit 75 may be able to communicate with the air mattress 110. In this example, the control circuit 75 is connected to the air mattress 110 via a cable 110c. This connection may be made wirelessly. The control circuit 75 may be able to communicate with the sensor 62. In this example, the control circuit 75 is connected to the sensor 62 via a cable 62ca. This connection may be made wirelessly.

[0121] The control circuit 75 may be connected to, for example, a switch 75A. The switch 75A is, for example, a remote controller (e.g., a "hand switch"). Power is supplied to the control circuit 75 via a power cable 75c. For example, power may be supplied from the control circuit 75 to an actuator. The electrically powered furniture 310 is, for example, an "active smart bed system."

[0122] FIG. 11 is a flowchart illustrating the operation of the air mattress according to the embodiment. FIG. 11 illustrates an example of operation in the "sleep mode."

[0123] For example, the sleep mode starts from a bed posture (sleep posture) in which the back of the bed is raised at a relatively small angle (for example, about 10 degrees from the horizontal plane). The sensor 62 (sleep sensor) detects the sleep state of the user 81 lying on the air mattress 110 (step S201). When the sleep sensor detects the "sleeping" state of the user 81, the back bottom is operated in a direction that reduces the back angle of the bed, and the bed posture is returned to a horizontal state (returned).

[0124] At the timing when the movement of the back bottom changes (when the back bottom starts to lower and when it finishes lowering), the user 81 is likely to feel acceleration from the back bottom, which may interfere with the user's continued sleep. For example, the air mattress 110 is controlled by changing the internal pressure of the air cells 11 of the air mattress 110 before and after the movement of the back bottom so that the user 81 does not feel the acceleration of the back bottom. The control is performed by the control device 70, for example.

[0125] For example, in "START", the control device 70 starts the following control flow in response to a procedure by the user 81 (pressing a sleep start button) or based on a predetermined start time.

[0126] Each bottom of the bed is maintained in a sleep posture. In the sleep posture, for example, the bed back angle is maintained at a small angle of about 10 degrees. The sleep sensor monitors whether the user 81 has fallen asleep. Whether the user 81 has fallen asleep corresponds to, for example, whether the state of the user 81 has changed from "awake" to "asleep."

[0127] When the monitor output of the sleep sensor changes from the "awake" state to the "asleep" state, it is determined that the user 81 has transitioned to a sleeping state. At this time, the control device 70 starts preparations to start the operation of lowering the back bottom. For example, in order to reduce the internal pressure of the air cells 11, the control device 70 starts venting the air cells 11 (step S202). Thereafter, the control device 70 starts the operation of rotating the back bottom so as to lower the back bottom of the bed (step S203). This operation reduces the repulsive force of the air cells 11 of the air mattress 110 against the user 81. Then, when the operation of lowering the back bottom starts, the repulsive force of the air mattress 110 (air cells 11) applied from the back bottom to the user 81 is reduced. This reduces the disturbance to the user 81's sleep.

[0128] In the lowering operation of the back bottom, the lowering operation of the back bottom may be started after the internal pressure of the air cell 11 has been reduced completely. The lowering operation may also be started while the internal pressure of the air cell 11 is being reduced (while the fluid is being exhausted).

[0129] When the back bottom of the bed is lowered to a horizontal position, the lowering operation of the back bottom is completed (step S203). The user 81 continues to sleep with the bed in a horizontal position. In the lowering operation of the back bottom of the bed, the back bottom may be lowered at a constant speed from the start to the end of the back lowering. It may also be controlled so that the speed change is small at the start and end of the back lowering. This reduces the effect of acceleration on the user 81.

[0130] The back lowering operation may be performed continuously from start to finish, or the back lowering operation may be performed intermittently by combining a lowering operation state and a pause state during the back lowering operation.

[0131] The air mattress 110 may start to be vented from the air cells 11 before the back lowering is completed. In this case, by continuing to reduce the internal pressure of the air cells 11 immediately before the back lowering is completed, it is possible to further reduce the effect of acceleration of the back bottom on the user 81, for example, when the back lowering is completed.

[0132] After the operation of lowering the back bottom of the bed is completed, the control device 70 starts supplying air to the air cells 11 of the air mattress 110 (step S205). This increases the internal pressure of the air cells 11. This makes it easier for the user 81 lying on the air mattress 110 to turn over while the bed bottom is in a horizontal position, providing a comfortable sleeping environment. Air may also be started to be supplied to the air cells 11 of the air mattress 110 before the operation of lowering the back bottom is completed.

[0133] In the sleep mode, after detecting the "asleep" state of the user 81 and starting to lower the back bottom, the user 81 may regain consciousness (become awake) before the lowering operation is completed. In this case, the sleep sensor outputs the "awake" state and the lowering operation of the back bottom is interrupted. After the interruption, the sleep state of the user 81 continues to be monitored, and when the output of the sleep sensor switches back to "asleep" (re-entering sleep), the lowering operation of the back bottom is resumed. With this operation, even if the sleep state of the user 81 changes to an awake state while the back bottom is being lowered, the lowering of the back bottom is interrupted and the back is maintained in an upright position at a small angle, thereby inducing the user 81 to fall asleep again.

[0134] FIG. 12 is a flowchart illustrating the operation of the air mattress according to the embodiment. 12 illustrates an example of an operation in the "wake-up mode." The "wake-up mode" is, for example, a mode corresponding to the fourth operation.

[0135] For example, when the control device 70 detects that the user 81 is in light sleep, it starts a preparatory operation to reduce the internal pressure of the air cells 11 of the air mattress 110 in preparation for waking up the user 81. Thereafter, the control device 70 starts raising the back bottom of the bed and completes raising the back bottom. Thereafter, the control device 70 increases the internal pressure of the air cells 11 of the air mattress 110 to encourage the user 81 to fully wake up. For example, the control device 70 creates a state in which the user 81 can easily move on the air mattress 110.

[0136] When humans suddenly wake up from deep sleep (asleep state), they wake up feeling uneasy and not comfortable. Conversely, when they wake up from light sleep (a transitional state (intermediate state) between "asleep" and "wakefulness"), they wake up feeling refreshed and comfortable.

[0137] In the wake-up mode, for example, the user 81 is woken up at a timing when the user 81 is in a light sleep, thereby providing the user 81 with a more refreshed and comfortable awakening (getting up from sleep). In the wake-up mode, the bed and air mattress are controlled as follows.

[0138] For example, the sleep sensor detects a transition state (intermediate state) from a "sleep" state to an "awake" state (step S201). The transition state (intermediate state) is detected by, for example, detecting an "increase in the number or frequency of body movements" or an "increase in the amplitude of body movements."

[0139] In step S201, if a transition state from the "asleep" state to the "wakefulness" state is detected, the control device 70 starts venting the air cells 11 of the air mattress 110 (step S202). The control device 70 reduces the internal pressure of the air cells 11. This operation can enhance the holding feeling of the air mattress 110 on the user 81 (maintain or fix the sleeping position) regardless of the sleeping position of the user 81.

[0140] Next, the back bottom of the bed starts to be raised (step S203A). This encourages the user 81 to wake up. To encourage the user 81 to wake up more effectively, the internal pressure of the air cells 11 is increased to increase the resistance (repulsion force) against the user 81. Alternatively, the air cells 11 can be repeatedly supplied and exhausted in short bursts to apply vibrations of repulsion force to the user 81.

[0141] The back-raising operation of the back bottom is completed (step S204B). Once the back-raising operation is completed, air is supplied to the air cells 11 of the air mattress 110 (S205). This increases the internal pressure of the air cells 11 of the air mattress 110. This operation not only promotes awakening by the back-raising operation of the back bottom, but also increases the resistance (repulsion force) of the air cells 11 against the user 81. This promotes complete awakening of the user 81 on the air mattress 110. For example, it is possible to create a state in which the user 81 can easily move on the air mattress 110.

[0142] When the user 81 wakes up and leaves the bed (gets out of bed), the internal pressure of the air cells 11 of the air mattress 110 drops compared to when the user 81 was in bed. Therefore, by monitoring the internal pressure of the air cells 11 of the air mattress 110, it is possible to easily monitor whether the user 81 is getting out of bed or staying in bed.

[0143] The sleep sensor can detect whether the user 81 is in bed by detecting body movement, for example, and therefore, by monitoring the body movement output of the sleep sensor, it is possible to monitor whether the user 81 is in or out of bed.

[0144] For example, by monitoring both the internal pressure of the air cells 11 of the air mattress 110 and the body movement output of the sleep sensor, it becomes possible to accurately detect whether the user 81 is in or out of bed.

[0145] For example, after detecting that the user 81 has left the bed, the back bottom and the leg bottom of the bed are operated to ensure a space between the air mattress 110 placed on the bed and the bottom. This makes it possible to provide a breathable space under the air mattress 110, for example. This makes it possible to improve the dehumidifying effect of the air mattress 110 and provide an efficient moisture countermeasure.

[0146] According to the embodiment, a control device and an air mattress that can provide a more comfortable air mattress can be provided.

[0147] Below, several examples of operations in the "sleep mode" will be described. The operations of the control device 70 (see FIG. 1(d)) described below may be performed by, for example, the control unit 72 (see FIG. 1(d)).

[0148] FIG. 13 is a flow chart illustrating the operation of the air mattress and the control device according to the embodiment. As shown in FIG. 13, for example, the sensor 62 (sleep sensor) detects the state of the user 81 lying on the air mattress 110 (step S201). If the user 81 is not asleep, step S201 continues. If the user 81 is asleep, the control device 70 performs a first control operation OP1 (step S202) to reduce the internal pressure of the air cell unit 10. The internal pressure is reduced by venting the air cell. In the following example, the internal pressure (initial pressure) before the start of the first control operation OP1 is, for example, 2 kPa.

[0149] Step S202 includes, for example, exhausting the air cell portion 10 (step S202a) and comparing the internal pressure of the air cell portion 10 with a first pressure (step S202b). The first pressure is a predetermined value, for example, 1 kPa. If the internal pressure of the air cell portion 10 is higher than the first pressure, the process returns to step S202a. If the internal pressure of the air cell portion 10 is equal to or lower than the first pressure, a second control operation OP2 is performed to change the angle of the back bottom.

[0150] In this example, the second control operation OP2 includes starting lowering the back of the bed bottom (step S203) and stopping lowering the back of the bed bottom (step S204). Thus, in this example, in the second control operation OP2, the control device 70 decreases the angle of the back bottom.

[0151] After the second control operation OP2, the control device 70 may further perform a third control operation OP3 to increase the internal pressure of the air cell unit 10 (step S205). The internal pressure of the air cell unit 10 increases due to the air supply to the air cell. For example, the internal pressure may become an initial internal pressure (e.g., 2 kPa). Furthermore, the state of the bed unit 70B (back angle) or the state of the user 81 (sleeping state, etc.) may be checked (step S206).

[0152] Thus, in this example, the control device 70 performs a first control operation OP1 to reduce the internal pressure of the air cell portion 10 of the air mattress 110 placed on the bed portion 70B including the back bottom. After performing at least a part of the first control operation OP1, the control device 70 performs a second control operation OP2 to change the angle of the back bottom. In this example, the angle of the back bottom is reduced in the second control operation OP2.

[0153] For example, when steps S202a and S202b are completed, the first control operation OP1 is completed. In this example, the control device 70 starts the second control operation OP2 after the first control operation OP1 is completed. In the embodiment, the second control operation OP2 may be started during the first control operation OP1 (for example, when the internal pressure of the air cell portion 10 starts to decrease).

[0154] In this embodiment, the control device 70 initiates the first control action OP1 when the fluctuation ΔS of the obtained signal SS becomes equal to or less than a predetermined threshold. For example, if the user 81 is asleep, the control device 70 initiates the first control action OP1. For example, the control device 70 may control the speed change to be small when the back lowering starts and ends. This can reduce the effect of acceleration on the user 81.

[0155] FIG. 14 is a flow chart illustrating the operation of the air mattress and the control device according to the embodiment. As shown in FIG. 14, the first control operation OP1 may include determining whether the current back angle is greater than a predetermined first angle (step S201c). The first angle is, for example, 5 degrees. If the current back angle is greater than the first angle (for example, 5 degrees), air cell exhaust (reducing the internal pressure of the air cell portion 10) is performed (step S202a). Then, the internal pressure is compared with a first pressure (for example, 1 kPa) (step S202b). If the internal pressure is higher than the first pressure, the process returns to step S202a. If the internal pressure is equal to or lower than the first pressure, the control device 70 performs a second control operation OP2 to change the angle of the back bottom.

[0156] In step S201c, if the current back angle is equal to or less than the first angle, the air cell is vented (the internal pressure of the air cell portion 10 is reduced) (step S202c). Then, the internal pressure is compared with a second pressure (e.g., 0.5 kPa) lower than the first pressure (step S202d). If the internal pressure is higher than the second pressure, the process returns to step S202c. If the internal pressure is equal to or less than the second pressure, the control unit 70 performs a second control operation OP2 to change the angle of the back bottom.

[0157] As described above, in this example, the degree of pressure reduction in the air cell portion 10 is changed depending on whether the current back angle is greater than the predetermined first angle. If the current back angle is greater than the first angle (e.g., 5 degrees), the internal pressure is set to a first pressure (e.g., 1 kPa) or less. On the other hand, if the current back angle is equal to or less than the first angle (e.g., 5 degrees), the internal pressure is lowered to a second pressure (e.g., 0.5 kPa) or less. If the current back angle is small, the impact on the user 81 of vibrations (acceleration or force) caused by changes in the back bottom angle is greater than when the current back angle is large. If the current back angle is small, the internal pressure in the air cell portion 10 is lowered, making the air cell portion 10 softer. This reduces the impact on the user 81 of vibrations (acceleration or force) caused by changes in the back bottom angle.

[0158] In this way, when the initial angle of the back bottom before the start of the first control operation OP1 is greater than the first angle, the control device 70 sets the internal pressure of the air cell portion 10 to a first pressure or less in the first control operation OP1 (steps S202a and S202b). When the initial angle of the back bottom is less than the first angle, the control device 70 may set the internal pressure of the air cell portion 10 to a second pressure lower than the first pressure in the first control operation OP1.

[0159] After such a first control operation OP1 (step S202), a second control operation OP2 (steps S203 and S204) is performed to reduce the angle of the back bottom. In one second control operation OP2, the angle of the back bottom is reduced by a predetermined amount. The amount of reduction is, for example, 1 degree. The amount of reduction may be, for example, 0.5 degrees or more and 2 degrees or less. If the target back angle is not reached by one second control operation OP2, the first control operation OP1 and the second control operation OP2 may be performed repeatedly.

[0160] As already explained, the third control operation OP3 may be performed after the second control operation OP2. In the example of FIG. 14, the angle of the back bottom after the second control operation OP2 is compared with a predetermined first angle (e.g., 5 degrees) (step S205a). If the angle of the back bottom after the second control operation OP2 is greater than the first angle, the control device 70 increases the internal pressure of the air cell unit 10 (step S205b). The internal pressure of the air cell unit 10 increases due to air supply to the air cell. Thereafter, the internal pressure is compared with a third pressure (step S205c). The third pressure is higher than the first pressure (e.g., 1 kPa). In one example, the third pressure is lower than the initial pressure (e.g., 2 kPa). The third pressure is, for example, 1.5 kPa. If the internal pressure is lower than the third pressure in step S205c, the process returns to step S205a. In step S205c, if the internal pressure is equal to or greater than the third pressure, the process proceeds to step S206a, which will be described later.

[0161] In step S205a, if the angle of the back bottom after the second control operation OP2 is equal to or less than the first angle, the control device 70 increases the internal pressure of the air cell portion 10 (step S205d). Thereafter, the internal pressure is compared with a fourth pressure (step S205e). The fourth pressure is lower than the first pressure (e.g., 1 kPa). In one example, the fourth pressure is higher than the second pressure (e.g., 0.5 kPa). The fourth pressure is, for example, 0.7 kPa. In step S205e, if the internal pressure is lower than the fourth pressure, the process returns to step S205d. In step S205e, if the internal pressure is equal to or greater than the fourth pressure, the process proceeds to step S206a, which will be described later.

[0162] In this way, the angle of the back bottom after the second control operation OP2 is compared with the first angle (e.g., 5 degrees). If the angle is greater than the predetermined first angle, for example, the internal pressure is set to a third pressure (e.g., 1.5 kPa). If the angle is equal to or less than the predetermined first angle, for example, the internal pressure is set to a fourth pressure (0.7 kPa). For example, the degree of air supply to the air cell is changed depending on whether the angle of the back bottom after the second control operation OP2 is greater or smaller than the first angle. This makes it possible to shorten the time for air supply to the air cell, for example. The third control operation OP3 can be performed efficiently. For example, if the first control operation OP1 and the second control operation OP2 are repeatedly performed, the first control operation OP1 can be performed efficiently.

[0163] In this way, if the angle of the back bottom after the second control operation OP2 is greater than a predetermined first angle (e.g., 5 degrees), the control device 70 may set the internal pressure of the air cell portion 10 to a third pressure higher than the first pressure in the third control operation OP3 (steps S205b and S205c).If the angle of the back bottom after the second control operation OP2 is equal to or smaller than the first angle, the control device 70 may set the internal pressure of the air cell portion 10 to a fourth pressure lower than the first pressure in the third control operation OP3.

[0164] In step S206a shown in FIG. 14, the angle of the back bottom after the second control operation OP2 (e.g., step S205) is compared with a predetermined value (e.g., a minimum value). The predetermined value (e.g., a minimum value) is, for example, 0 degrees. If the angle of the back bottom after the second control operation OP2 is greater than the predetermined value (e.g., 0 degrees), the process returns to step S201. If the angle of the back bottom after the second control operation OP2 is equal to the predetermined value, air is supplied to the air cell (step S206b). The internal pressure of the air cell unit 10 becomes, for example, an initial pressure (e.g., 2 kPa). The processing before step S206b corresponds to, for example, the "sleep mode." After step S206b, the user 81 sleeps on the air mattress 110.

[0165] In this way, if the angle of the back bottom after the second control operation OP2 is greater than a predetermined minimum value (e.g., 0 degrees), the control device 70 repeats the first control operation OP1 and the second control operation OP2. For example, if the angle of the back bottom after the second control operation OP2 is substantially the minimum value, the control device 70 increases the pressure in the air cell portion 10 (step S206b). For example, the control device 70 sets the pressure in the air cell portion 10 to a pressure higher than the first pressure (e.g., the initial pressure).

[0166] FIG. 15 is a flowchart illustrating the operation of the air mattress and control device according to the embodiment. 15, in this example, the internal pressure is compared with the first pressure (step S207) depending on the result of comparing the back bottom angle after the second control operation OP2 with the first angle (step S205a). Depending on the result, a third control operation OP3 or a fourth control operation OP4 is performed. Examples of these operations will be described below.

[0167] As shown in FIG. 15, if the angle of the back bottom after the second control operation OP2 is greater than the first angle in step S205a, the control device 70 performs steps S205b and S205c, which have already been described. On the other hand, if the angle of the back bottom after the second control operation OP2 is equal to or less than the first angle in step S205a, the control device 70 compares the internal pressure of the air cell portion 10 with the first pressure (step S207). If the internal pressure is equal to or less than the first pressure in step S207, the control device 70 increases the internal pressure of the air cell portion 10 (step S205d). Thereafter, the internal pressure is compared with a fourth pressure (step S205e). If the internal pressure is lower than the fourth pressure, the process returns to step S205d. If the internal pressure is equal to or greater than the fourth pressure in step S205e, the process proceeds to step S206a.

[0168] In step S207, if the internal pressure is higher than the first pressure, the control device 70 reduces the internal pressure of the air cell portion 10 (step S208a). Thereafter, the internal pressure is compared with the fourth pressure (step S208b). If the internal pressure is higher than the fourth pressure, the process returns to step S208a. If the internal pressure is equal to or lower than the fourth pressure in step S208b, the process proceeds to step S206a.

[0169] Thus, in the embodiment, if the angle of the back bottom after the second control operation OP2 is equal to or less than the first angle and the internal pressure of the air cell portion 10 after the second control operation OP2 is equal to or less than the first pressure (if "Yes" in step S207), the control device 70 sets the internal pressure to equal to or greater than the fourth pressure, which is lower than the first pressure, in the third control operation OP3. For example, the control device 70 sets the internal pressure to the fourth pressure in the third control operation OP3.

[0170] If the angle of the back bottom after the second control operation OP2 is equal to or less than the first angle and the internal pressure of the air cell unit 10 after the second control operation OP2 is higher than the first pressure ("No" in step S207), the control device 70 further performs a fourth control operation OP4 to reduce the internal pressure of the air cell unit 10 (step S208a). In the fourth control operation OP4, the control device 70, for example, reduces the internal pressure of the air cell unit 10 to a fourth pressure or less that is lower than the first pressure. For example, the control device 70 vents the air cell to reduce the internal pressure to the fourth pressure.

[0171] This makes it possible, for example, to shorten the time required for air intake and exhaust to and from the air cell portion 10. For example, when the first control operation OP1 and the second control operation OP2 are repeatedly performed, the first control operation OP1 can be performed efficiently.

[0172] In the processing illustrated in FIGS. 14 and 15 above, if the air cell unit 10 includes a plurality of air cells 11, the internal pressure of the plurality of air cells 11 may be changed in sequence. For example, the air cell unit 10 may include a first air cell and a second air cell. The first air cell may be, for example, the head block 11A. The second air cell may be, for example, the waist block 11C. For example, if the air cell unit 10 includes a first air cell, a second air cell, and a third air cell, the first air cell may be, for example, the head block 11A, the second air cell may be, for example, the shoulder block 11B, and the third air cell may be, for example, the waist block 11C. In this case, for example, the internal pressure of each of the first to third air cells may be changed in sequence. Such an example will be described below.

[0173] FIG. 16 is a flow chart illustrating the operation of the air mattress and control device according to the embodiment. Fig. 16 shows an example of the decrease in internal pressure in the first control operation OP1 and the fourth control operation OP4. Fig. 16 illustrates the processing performed in steps S202a, S202c, S208a, etc. In the following example, the first to third air cells are the head block 11A, shoulder block 11B, and waist block 11C, respectively.

[0174] As shown in Fig. 16, the first air cell is evacuated (step S301). The internal pressure of the first air cell is compared with pressure α1 (step S301a). If the internal pressure of the first air cell is higher than pressure α1, the process returns to step S301.

[0175] In step S301a, if the internal pressure of the first air cell is equal to or less than pressure α1, the second air cell is evacuated (step S302). The internal pressure of the second air cell is compared with pressure α1 (step S302a). If the internal pressure of the second air cell is higher than pressure α1, the process returns to step S302.

[0176] In step S302a, if the internal pressure of the second air cell is equal to or less than pressure α1, the third air cell is evacuated (step S303). The internal pressure of the third air cell is compared with pressure α1 (step S303a). If the internal pressure of the third air cell is higher than pressure α1, the process returns to step S303.

[0177] In step S303a, if the internal pressure of the third air cell is equal to or lower than pressure α1, for example, the internal pressures of all the air cells are compared with a target internal pressure (step S305). For example, if the internal pressures of all the air cells are equal to or lower than the target internal pressure, the process proceeds to the next step. The next step is, for example, the second control operation OP2.

[0178] For example, if the internal pressures of all the air cells are not equal to or lower than the target internal pressure, the pressure α1 is set to a value lower than the pre-update pressure α1 (for example, α1-β1), and the process returns to step S301. In this example, for example, the target internal pressure is the first pressure. At this time, the pressure α1 is higher than the first pressure. In one example, the pressure α1 is 1.5 kPa and the pressure β1 is 0.5 kPa. For example, the pressure is reduced in increments of 0.5 kPa. By gradually reducing the internal pressure, it is possible to reduce the vibration (acceleration or force) applied to the user 81 from the air cell unit 10. By gradually reducing the internal pressure, it is possible to reduce the internal pressure while, for example, the pressure difference between the first to third air cells is small. This makes it possible to reduce, for example, changes in the posture of the user 81. The pressure α1 is, for example, a relatively low pressure, and is an internal pressure that can reduce the vibration (acceleration or force) applied to the user 81. By gradually decreasing the internal pressure from this pressure α1 by the pressure β1, the influence of vibration (acceleration or force) can be further reduced. The values ​​of the pressure α1 and the pressure β1 can be changed in various ways.

[0179] In this way, the first control operation OP1 may include repeatedly reducing the internal pressure of the first air cell and then reducing the internal pressure of the second air cell. For example, the fourth control operation OP4 may include repeatedly reducing the internal pressure of the first air cell and then reducing the internal pressure of the second air cell.

[0180] In this way, the control device 70 may sequentially vent the plurality of air cells in the first control operation OP1 or the fourth control operation OP4. By venting gradually, for example, it is possible to reduce the noise generated. For example, the plurality of air cells may be vented in a desired order. In this case, venting can be performed according to the preferences of the user 81.

[0181] On the other hand, multiple air cells may be deflated simultaneously. In this case, for example, the posture of the user 81 can be kept substantially constant during the deflation of multiple air cells. For example, it is easier for the user 81 to maintain a lying down posture.

[0182] In the embodiment, the pressure α1 for the second air cell may be the same as or different from the pressure α1 for the first air cell, and the pressure α1 for the third air cell may be the same as or different from the pressure α1 for the first air cell.

[0183] When the air cell unit 10 includes a plurality of air cells 11, the internal pressure of the plurality of air cells 11 may be increased in sequence.

[0184] FIG. 17 is a flow chart illustrating the operation of the air mattress and the control device according to the embodiment. Fig. 17 shows an example of an increase in internal pressure in the third control operation OP3. Fig. 17 illustrates the processing performed in steps S205b and S205d, for example. In the following example, the first to third air cells are the head block 11A, shoulder block 11B, and waist block 11C, respectively.

[0185] As shown in Fig. 17, air is supplied to the first air cell (step S311). The internal pressure of the first air cell is compared with pressure γ1 (step S311a). If the internal pressure of the first air cell is lower than pressure γ1, the process returns to step S311.

[0186] In step S311a, if the internal pressure of the first air cell is equal to or greater than pressure γ1, air is supplied to the second air cell (step S312). The internal pressure of the second air cell is compared with pressure γ1 (step S312a). If the internal pressure of the second air cell is lower than pressure γ1, the process returns to step S312.

[0187] In step S312a, if the internal pressure of the second air cell is equal to or greater than pressure γ1, air is supplied to the third air cell (step S313). The internal pressure of the third air cell is compared with pressure γ1 (step S313a). If the internal pressure of the third air cell is lower than pressure γ1, the process returns to step S313.

[0188] In step S313a, if the internal pressure of the third air cell is equal to or lower than pressure γ1, for example, the internal pressures of all the air cells are compared with a target internal pressure (step S315). For example, if the internal pressures of all the air cells are equal to or higher than the target internal pressure, the process proceeds to the next step. The next step is, for example, step S206a.

[0189] For example, if the internal pressures of all the air cells are not equal to or greater than the target internal pressure, the pressure γ1 is set to a value higher than the pre-update pressure γ1 (for example, γ1 + δ1), and the process returns to step S311. In one example, the pressure γ1 is 1.5 kPa, and the pressure δ1 is 0.5 kPa. For example, the pressure is increased in increments of 0.5 kPa. In this example, the target internal pressure is, for example, the third pressure or the fourth pressure. By gradually increasing the internal pressure, it is possible to reduce changes in vibration (acceleration or force) applied to the user 81 from the air cell unit 10. By gradually increasing the internal pressure, it is possible, for example, to increase the internal pressure while keeping the pressure difference between the first to third air cells small. This, for example, reduces changes in the posture of the user 81. The values ​​of the pressure γ1 and the pressure δ1 can be changed in various ways.

[0190] Thus, in the embodiment, in the third control operation OP3, the control device 70 may repeatedly increase the internal pressure of the first air cell and then the second air cell. For example, this can reduce the noise generated. For example, air may be supplied to multiple air cells in a desired order. In this case, air can be supplied according to the preferences of the user 81.

[0191] Alternatively, air may be supplied to a plurality of air cells simultaneously. In this case, for example, the posture of the user 81 can be kept substantially constant while air is being supplied to the plurality of air cells. For example, it is easier for the user 81 to maintain a lying-down posture.

[0192] In the embodiment, the pressure γ1 for the second air cell may be the same as or different from the pressure γ1 for the first air cell, and the pressure γ1 for the third air cell may be the same as or different from the pressure γ1 for the first air cell.

[0193] An example of the operation in the "wake-up mode" will be described below. The operation of the control device 70 (see FIG. 1(d)) described below may be performed by, for example, the control unit 72 (see FIG. 1(d)).

[0194] FIG. 18 is a flow chart illustrating the operation of the air mattress and the control device according to the embodiment. As shown in FIG. 18, for example, the sensor 62 (sleep sensor) detects the state of the user 81 lying on the air mattress 110 (step S201). If the user 81 is asleep, step S201 continues. If the user 81 is not asleep, the control device 70 performs a first control operation QP1 (step S202) to reduce the internal pressure of the air cell unit 10. The internal pressure is reduced by venting the air cell. For example, the internal pressure is reduced, and the user 81's body is sunk into the air mattress 110, and the user's back is raised. This prevents the user 81, who has been determined to be asleep, from falling left or right. The user's back can be raised while maintaining a more stable posture.

[0195] For example, when the user 81 is not asleep, the variation ΔS of the obtained signal SS exceeds a predetermined threshold. When the variation ΔS exceeds the predetermined threshold, the control device 70 starts a first control action QP1.

[0196] The first control action QP1 (step S202) includes, for example, reducing the internal pressure (step S202a) and comparing the internal pressure with a first pressure (step S202b). If the internal pressure is higher than the first pressure, the process returns to step S202a. If the internal pressure is equal to or lower than the first pressure, the second control action QP2 is performed to change the angle of the back bottom.

[0197] In the wake-up mode, the angle of the back bottom is increased in the second control motion QP2. In this example, the second control motion QP2 includes starting to raise the back of the bed bottom (step S203A) and stopping the raising of the back of the bed bottom (step S204B).

[0198] Thereafter, it is determined whether the user 81 is awake (step S351). If the user 81 is awake, the internal pressure of the air cell unit 10 is increased (step S352). The internal pressure increases as air is supplied to the air cell. The increased internal pressure is, for example, 2 kPa. For example, the user 81 can easily get up.

[0199] In step S351, if the state of the user 81 is not awake, the number of times the back is raised is compared with the setting (step S353). If the number of times the back is raised is less than the setting value, 1 is added to the number of times the back is raised (step S204C). After this, the angle of the back bottom is decreased (for example, third control operation QP3). For example, the bed bottom lowering is started (step S204Ba) and stopped (step S203Aa). After this, the process returns to step S203A. As a result, the back raising (steps S203A and S204B) and back lowering (steps S204Ba and S203Aa) are repeated. This repeated operation corresponds to, for example, a "snooze wake-up" operation.

[0200] In step S353, if the number of times the back is raised is equal to or greater than the set value, for example, the control device 70 supplies an external stimulus to the user 81 (step S354). The supply of the external stimulus includes, for example, providing at least one selected from the group consisting of vibration, light, and sound to the user 81. After step S354, the process proceeds to step S352.

[0201] Thus, in the embodiment, the control device 70 may further perform a third control action QP3 (back lowering) that reduces the angle of the back bottom after the second control action QP2 (back raising). The control device 70 may repeat the second control action QP2 and the third control action QP3 a predetermined number of times.

[0202] According to the embodiment, a control device and an air mattress that can provide a more comfortable air mattress can be provided.

[0203] The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. For example, the specific configurations of the elements, such as the air cell portion included in the air mattress and the control portion included in the control device, are within the scope of the present invention as long as a person skilled in the art can implement the present invention in a similar manner and obtain similar effects by appropriately selecting them from known ranges.

[0204] Any combination of two or more elements of each embodiment to the extent technically possible is also included within the scope of the present invention as long as it encompasses the gist of the present invention.

[0205] In addition, all control devices and air mattresses that can be implemented by a person skilled in the art by appropriately modifying the design based on the control device and air mattress described above as embodiments of the present invention also fall within the scope of the present invention as long as they include the gist of the present invention.

[0206] In addition, within the scope of the concept of the present invention, a person skilled in the art may come up with various modifications and alterations, and it will be understood that these modifications and alterations also fall within the scope of the present invention. [Explanation of symbols]

[0207] 10...Air cell portion, 11...Air cell, 11A...Head block, 11B...Shoulder block, 11C...Waist block, 11D...Buttocks block, 11E...Upper leg block, 11F...Lower leg block, 11p...Tube, 21...First side edge portion, 22...Second side edge portion, 31...Pump portion, 31d...DC pump, 31s...Pressure sensor, 40...Upper layer cushion portion, 45L...Bottom cover, 45Lf...Fastener, 45U...Top cover, 45Uf...Fastener, 60...Reception portion, 62...Sensor, 62a...Circuit portion, 62b...Pressure sensor portion, 62c...Sensor communication portion, 62ca...Cable, 62d...Sensor device, 62p...First plate body, 62q...Second plate body, 62r Air container, 62s...support protrusion, 62t...groove, 62u...signal line, 62v...detection circuit, 63D...display unit, 63a...first display input unit, 63b...second display input unit, 64a to 64f...display input unit, 65...input receiving unit, 68...cable, 70...control device, 70B...bed unit, 71...bottom, 71A...back actuator, 71B...knee actuator, 72...control unit, 72c...communication unit, 73...wireless communication terminal, 73c...communication unit, 73d...input / output screen, 74...bed leg, 75...control circuit, 75A...switch, 75c...power cable, 78...memory unit, 81...user, ΔS...fluctuation, 110...air mattress, 110c...cable, 310, 340...electric furniture, Dt...duty ratio, Nc, Nm...number of times, OP1~OP4...first to fourth control actions, QP1~QP3...first to third control actions, Pr...pressure, SS...signal, Sc...threshold value, SigC...intensity, t1...elapsed time, tc...time, tm...time

Claims

1. A control device for controlling a bed and an air mattress in at least one operating mode of a normal mode, a sleep mode, and a wake-up mode, The sleep mode is started when an input is received by an input receiving unit or when a predetermined time arrives, During the sleep mode, Obtaining the detection result of the user's sleep state from the sleep sensor, When the user of the bed and the air mattress falls asleep, the control device controls the air mattress to reduce the internal pressure of the air mattress, then lowers the back angle of the bed, and after lowering the back angle of the bed, controls the air mattress to increase the internal pressure of the air mattress.

2. The control device according to claim 1 , wherein the sleep sensor placed between the bed and the air mattress acquires the user's sleep state, and the control device controls the bed and the air mattress according to the user's sleep state.

3. During the wake-up mode, 3. The control device according to claim 1, wherein when the user enters the first state, the control device controls the air mattress to reduce the internal pressure of the air mattress, then raises the back angle of the bed, and after raising the back angle of the bed, controls the air mattress to increase the internal pressure of the air mattress.

4. During the sleep mode, When the user of the bed and the air mattress falls asleep, the control device controls the air mattress to reduce the internal pressure of the air mattress; 4. The control device of claim 3, wherein the control device determines whether the internal pressure of the air mattress is equal to or less than a first pressure, and controls the air mattress to reduce the internal pressure of the air mattress until the internal pressure of the air mattress is equal to or less than the first pressure.

Images