Inflatable mattress

Abstract

According to an embodiment, an air bed includes a chamber portion including a chamber, and a control portion that controls an internal pressure of the chamber. The control portion implements a first action when the internal pressure of the chamber satisfies a second condition after satisfying a first condition. The first condition includes that the internal pressure changes from a first value to a second value lower than the first value, a difference between the first value and the second value is above a first threshold, and a rate of change of the internal pressure with respect to time from the first value to the second value is above a second threshold. The second condition includes that, after the internal pressure decreases from the first value to the second value, the internal pressure changes to a third value lower than the second value, a difference between the second value and the third value is above a third threshold. In the first action, the control portion causes the internal pressure to change toward the second value.

Description

[0001] This application is a divisional application of the following patent application:

[0002] Application Number: 201980034863.1

[0003] Application date: June 17, 2019

[0004] Invention Title: Air Mattress Technical Field

[0005] Embodiments of the present invention relate to an air mattress. Background Technology

[0006] There is an air mattress that uses air chambers. People expect more comfort from air mattresses.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent Application Publication No. 2008-307249 Summary of the Invention

[0010] The technical problem that the invention aims to solve

[0011] Embodiments of the present invention provide a more comfortable air mattress.

[0012] Technical solutions adopted to solve technical problems

[0013] According to an embodiment, an air mattress includes: an air chamber portion, the air chamber portion including an air chamber, and a control portion, the control portion controlling the internal pressure of the air chamber. When the internal pressure of the air chamber satisfies a first condition and then a second condition, the control portion performs a first action. The first condition includes: the internal pressure changes from a first value to a second value lower than the first value, the difference between the first value and the second value is greater than or equal to a first threshold, and the rate of change of the internal pressure from the first value to the second value with respect to time is greater than or equal to a second threshold. The second condition includes: after the internal pressure decreases from the first value to the second value, the internal pressure changes to a third value lower than the second value, and the difference between the second value and the third value is greater than or equal to a third threshold. In the first action, the control portion causes the internal pressure to change towards the second value.

[0014] Invention Effects

[0015] The embodiments of the present invention can provide a more comfortable air mattress. Attached Figure Description

[0016] Figure 1 (a)~ Figure 1(c) is a schematic diagram illustrating the air mattress of the first embodiment.

[0017] Figure 2 This is a schematic diagram illustrating the operation of the air mattress according to the first embodiment.

[0018] Figure 3 This is a schematic diagram illustrating the operation of an air mattress as an example.

[0019] Figure 4 (a) and Figure 4 (b) is a schematic diagram illustrating the operation in an air mattress according to an exemplary embodiment.

[0020] Figure 5 This is a coordinate graph illustrating the actions within an air mattress according to an example implementation.

[0021] Figure 6 This is a flowchart illustrating the operations in an air mattress according to an example implementation.

[0022] Figure 7 (a)~ Figure 7 (c) is a schematic diagram illustrating the operation of the air mattress according to the third embodiment. Detailed Implementation

[0023] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0024] The accompanying drawings are schematic or conceptual, and the relationships between the thicknesses and widths of the parts, as well as the size ratios between the parts, may not be the same as in reality. Even when representing the same parts, the dimensions or proportions between them may sometimes differ depending on the accompanying drawing.

[0025] In this application specification and the figures, for existing figures, the same reference numerals are used to label the same elements as those described above, and detailed descriptions are omitted where appropriate.

[0026] (First Implementation)

[0027] Figure 1 (a)~ Figure 1 (c) is a schematic diagram illustrating the air mattress of the first embodiment.

[0028] Figure 1 (a) is a perspective view of an air mattress 110 illustrating an embodiment. Figure 1 (b) is a top view illustrating the receiving part 60 of the air mattress 110. Figure 1 (c) is a functional block diagram of the air mattress 110.

[0029] like Figure 1 As shown in (a), the air mattress 110 of the embodiment includes a plurality of air chambers 11. Figure 1As shown in (c), the air mattress 110 of the embodiment also includes a control unit 72.

[0030] like Figure 1 As shown in (a), a plurality of air chambers 11 are included in the air chamber section 10. The plurality of air chambers 11 are, for example, cylindrical.

[0031] Multiple air chambers 11 are arranged along a first direction. This first direction is defined as the X-axis. A direction perpendicular to the X-axis is defined as the Z-axis. A direction perpendicular to both the X-axis and Z-axis is defined as the Y-axis.

[0032] The first direction corresponds, for example, to the direction from head to toe when a user is sleeping 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.

[0033] like Figure 1 As shown in (a), in this example, an upper buffer pad portion 40 is provided on the air chamber portion 10 (on the air chamber 11). The upper buffer pad portion 40 includes, for example, polymer foam. The polymer foam includes, for example, polyurethane foam. The polymer foam includes a plurality of pores.

[0034] When using the air mattress 110 of the embodiment, the air chamber 10 can be covered by a cover or the like. The cover or the like may include materials such as polyester.

[0035] like Figure 1 As shown in (a), the air mattress 110 also includes a pump unit 31. The pump unit 31 is connected to each of the plurality of air chambers 11 via a pipe 11p. The pump unit 31 supplies air to and vents air from the plurality of air chambers 11.

[0036] exist Figure 1 In the example shown in (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 unit 72 may also be located in a different position from the housing. The control unit 72 may also be a smartphone type (e.g., a portable terminal type).

[0037] like Figure 1 As shown in (c), 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 use at least one wired or wireless method. The control unit 72 controls the pump unit 31. The operation of the pump unit 31 controls the internal pressure of the plurality of air chambers 11. In the embodiment, "internal pressure" corresponds to the difference between internal pressure and air pressure. For example, "internal pressure" corresponds to "gauge pressure".

[0038] like Figure 1As shown in (c), a pressure sensor 31s (sensor) may also be provided, for example. The pressure sensor 31s is provided, for example, in the housing of the pump section 31. For example, the pressure sensor 31s can detect the internal pressure of the plurality of air chambers 11. In one example, the internal pressure of each of the plurality of air chambers 11 can be detected by detecting the internal pressure of the pipe 11p connected to each of the plurality of air chambers 11.

[0039] like Figure 1 (a) and Figure 1 As shown in (b), the air mattress 110 may further include a receiver 60. The receiver 60 receives input from the user. The receiver 60 is, for example, an operation switch (e.g., a remote control). The control unit 72 controls the internal pressure of the plurality of air chambers 11 based on the input received by the receiver 60. The receiver 60 is connected to the control unit 72 (or the pump unit 31) by at least one wired or wireless method. In this example, the receiver 60 is connected to the control unit 72 (or the pump unit 31) via a cable 68.

[0040] like Figure 1 As shown in (b), for example, various buttons (such as display input unit 61 and display input unit 62) are provided in the receiving unit 60. By operating these buttons, the user controls the internal pressure of each of the multiple air chambers 11 to the desired state.

[0041] like Figure 1 As shown in (c), a storage unit 78 may also be provided. The internal pressure desired by the user can be stored in the storage unit 78. The control unit 72 can control the internal pressure of the multiple air chambers 11 based on the data stored in the storage unit 78. The data may include the time variation of the internal pressure. The control unit 72 can control the internal pressure of each of the multiple air chambers 11 (multiple blocks) to vary over time.

[0042] The control unit 72 can maintain a constant internal pressure in the air chamber 11. For example, air may sometimes leak from gaps such as the connection between the pipe 11p and the connector of the air chamber 11. As a result, the internal pressure may sometimes drop by approximately 0.1 kPa to 0.5 kPa per day. For example, to restore the internal pressure from the air leak, the control unit 72 can periodically adjust the internal pressure. For example, when the internal pressure of the air chamber 11 is lower than the set allowable range, the control unit 72 causes the pump unit 31 to supply air to the air chamber 11. This adjusts the internal pressure to bring it back within the allowable range. The decrease in internal pressure of the air chamber 11 due to the air leak is slow.

[0043] On the other hand, when a user lies on the air chamber 10, which includes the air chamber 11, the internal pressure of the air chamber 11 increases. Furthermore, when the user gets off the bed (when they are no longer on the air chamber 10), the internal pressure of the air chamber 11 drops sharply. When this sharp drop in internal pressure occurs, and the internal pressure is increased to restore it, the internal pressure is higher than desired when the user lies on the air chamber 10 again. Therefore, it has been determined that discomfort sometimes occurs. This discomfort can sometimes impair comfort.

[0044] In this embodiment, as described below, no action is taken to restore the reduced internal pressure during the rapid changes in internal pressure as described above. This allows for a more comfortable air mattress. An example of the operation of this embodiment will be described below. This operation is performed, for example, by the control unit 72.

[0045] Figure 2 This is a schematic diagram illustrating the operation of the air mattress according to the first embodiment.

[0046] Figure 2 The horizontal axis represents time tm. The vertical axis represents the internal pressure Pi of the air chamber.

[0047] like Figure 2 As shown, the control unit 72 performs the first action OP1. The first action OP1 is performed when the internal pressure Pi of the air chamber 11 meets the following first condition and then meets the following second condition.

[0048] The first condition includes: the internal pressure Pi changes from a first value P1 to a second value P2 that is lower than the first value P1, the difference ΔP1 between the first value P1 and the second value P2 is greater than or equal to a first threshold, and the rate of change of the internal pressure Pi from the first value P1 to the second value P2 with respect to time tm is greater than or equal to a second threshold.

[0049] For example, when the difference ΔP1 between the internal pressure Pi and the internal pressure Pi above the first threshold is generated with a steepness above the second threshold, the first condition is satisfied.

[0050] exist Figure 2 In the example, the first condition is met at the first time t1. For example, the user leaves the air mattress 110 (leaves the bed) at the first time t1. Thus, the first condition is met. For example, the first condition is determined to be met when the difference ΔP1 is greater than 0.5 kPa over a period of 5 minutes to 12 hours.

[0051] exist Figure 2 In the example, the second condition is satisfied at the second time t2. The second condition includes: after the internal pressure Pi drops from the first value P1 to the second value P2, the internal pressure Pi becomes a third value P3 that is lower than the second value, and the difference ΔP2 between the second value P2 and the third value P3 is above the third threshold.

[0052] For example, after the first time t1, the internal pressure Pi decreases slowly. This is due to, for example, air leakage from air chamber 11. Moreover, when the change in internal pressure Pi (difference ΔP2) caused by the leakage becomes above the threshold (third threshold) (the second time t2), the second condition is satisfied.

[0053] When the second condition following the first condition is met, the control unit performs the first action OP1. In the first action OP1, the control unit 72 causes the internal pressure Pi to change toward the second value P2.

[0054] For example, when only the first condition is met (e.g., getting out of bed), the control unit 72 does not cause the internal pressure Pi of the air chamber 11 to rise. Therefore, when the user sits back on the air mattress 110 from the state of being out of bed, the internal pressure Pi returns from the second value P2 to the first value P1. The internal pressure Pi returns to its state before getting out of bed, thereby suppressing discomfort.

[0055] On the other hand, after the first condition (when getting out of bed) is met, if the second condition is met due to air leakage or other reasons, the control unit 72 restores the internal pressure Pi to the second value P2. The second value P2 is the internal pressure Pi at the time of getting out of bed. Therefore, when the user sits on the air mattress 110 again from the state of getting out of bed, the internal pressure Pi returns from the second value P2 to the first value P1. The internal pressure Pi returns to the state before getting out of bed, thereby suppressing discomfort.

[0056] The first action OP1, as described above, enables a more comfortable air mattress.

[0057] like Figure 2 As shown, at the third time t3, the internal pressure Pi decreases due to air leakage, etc. At the third time t3, the change in internal pressure Pi (difference ΔP2) is less than the threshold (third threshold). Therefore, at the third time t3, the control unit 72 does not perform the first action OP1.

[0058] The control unit 72 may further perform the second operation OP2 as described below. The second operation OP2 is performed when the internal pressure Pi of the air chamber 11 meets the following third condition.

[0059] The third condition includes: the internal pressure Pi rises to a fourth value P4, which is higher than the second value P2, and the difference ΔP3 between the fourth value P4 and the second value P2 is above a threshold (the fourth threshold). The fourth threshold is, for example, approximately 0.4 kPa.

[0060] exist Figure 2 In the example, the third condition is met at the fourth time t4. For instance, at the fourth time t4, the user lies on the air mattress 110. As a result, the internal pressure Pi of the air chamber 11 increases. The increase in internal pressure Pi is caused by the user's weight.

[0061] When the increase in internal pressure Pi (difference ΔP3) exceeds a threshold (fourth threshold), the control unit 72 performs a second operation OP2. In the second operation OP2, the control unit 72 causes the internal pressure Pi to change towards either a first value P1 or a set fifth value P5. Therefore, when the user lies on the air mattress 110 again, the internal pressure Pi returns to the desired value (first value P1 or fifth value P5). This allows the user to be provided with a firmness (softness) that they prefer.

[0062] The second action OP2 described above can provide a more comfortable air mattress.

[0063] The first value P1 can be a value detected before the first condition is met at the first time t1. For example, the first value P1 can be a value used to determine whether the first condition is met. For example, it can be detected by a pressure sensor 31s. The detected value (first value P1) can also be stored in a storage unit 78, etc.

[0064] The fifth value P5, for example, is obtained through user operation of the receiving unit 60 (see reference). Figure 1 (b)) etc. are used to set this. Figure 2 As shown, it is also possible that before the first time t1, the internal pressure Pi gradually decreases from the fifth value P5. This decrease in internal pressure Pi is caused, for example, by air leakage. Moreover, at the first time t1, the internal pressure Pi changes drastically. The first value P1 and the fifth value P5 can also be substantially the same. At least one of the first value P1 and the fifth value P5 can be stored, for example, in the storage unit 78, etc.

[0065] exist Figure 2 After the second time t2 shown (in this example, the fifth time t5), the internal pressure Pi sometimes exceeds the second value P2. For example, when a lighter object (an item or a child, etc.) sits on the air mattress 110, such an increase in internal pressure Pi occurs. At the fifth time t5, the increase in internal pressure Pi (difference ΔP3) is less than the threshold (third threshold). Therefore, at the fifth time t5, the control unit 72 does not perform the second action OP2. In this example, after the fifth time t5, the "lighter object" is removed, and the internal pressure Pi substantially becomes the second value P2, for example. Then, as described above, at the fourth time t4, the increase in internal pressure Pi (difference ΔP3) exceeds the fourth threshold, and the control unit 72 performs the second action OP2.

[0066] The second value P2 is, for example, the value detected when the first condition is met at the first time t1. This can be detected by a pressure sensor at time 31s. The detected value (second value P2) can also be stored in a storage unit 78, etc.

[0067] The control unit 72 can also perform the above-mentioned actions based on the first value P1, the second value P2 and the fifth value P5 stored in the storage unit 78.

[0068] As already explained, a receiving unit 60 for receiving user input can also be set up (see reference). Figure 1 (b)). At this time, when the receiving unit 60 receives an input of the internal pressure Pi of the changing air chamber 11, it can reset at least one of the first value P1 and the second value P2 stored in the storage unit 78. When the receiving unit 60 receives an input of the internal pressure Pi of the changing air chamber 11, it can reset the fifth value P5 stored in the storage unit 78.

[0069] In one embodiment, the air mattress 110 may further include a sensor (pressure sensor 31s) for detecting a first value P1 and a second value P2.

[0070] Figure 3 This is a schematic diagram illustrating the operation of an air mattress as an example.

[0071] Figure 3 The horizontal axis represents time tm. The vertical axis represents the internal pressure Pi of the air chamber.

[0072] exist Figure 3 In the air mattress 119 of the reference example shown, at a first time t1, the internal pressure Pi of the air chamber 11 drops sharply from a first value P1 to a second value P2. This sharp drop is caused, for example, by the user getting out of bed. Then, at a sixth time t6, the internal pressure Pi further drops from the second value P2 to below a threshold. In the reference example, at the sixth time t6, the internal pressure Pi is increased to, for example, the first value P1. In the reference example, there is no distinction between the slow drop in internal pressure Pi due to air leakage and the sharp drop in internal pressure Pi due to getting out of bed. Therefore, when the user lies on the air mattress 119 at a seventh time t7, the internal pressure Pi further increases from the first value P1. Therefore, the air mattress 119 becomes firmer than the user expects, failing to provide the desired firmness.

[0073] In this example, after the seventh time t7, the internal pressure Pi exceeds the set allowable range of internal pressure. Therefore, for example, the control unit 72 causes the internal pressure Pi to decrease at the eighth time, in this example, the internal pressure Pi becomes the first value P1.

[0074] Compared to such a reference example, discomfort can be suppressed in the air mattress 110 of the embodiment. In this embodiment, a more comfortable air mattress can be provided.

[0075] In the first embodiment, for example, when the internal pressure Pi drops sharply, the control unit 72 determines that the patient should leave the bed. The internal pressure Pi at this time (second value P2) corresponds, for example, to the "internal pressure at the time of leaving the bed". For example, a set allowable value is set for the difference between the internal pressure at the time of leaving the bed and the internal pressure Pi. For example, when a natural leak occurs, the control unit 72 supplies air until the internal pressure at the time of leaving the bed is reached. On the other hand, when the internal pressure Pi rises from the internal pressure at the time of leaving the bed to a threshold value or higher, the control unit 72 can determine that the patient should remain in bed. Then, by setting a set allowable value for the original set internal pressure, the internal pressure at the time of leaving the bed can be reset. When the internal pressure Pi is changed through manual operation or procedure, the set internal pressure (fifth value P5), the internal pressure before leaving the bed (first value P1), and the internal pressure at the time of leaving the bed (second value P2) can also be reset.

[0076] In the first embodiment, for example, the internal pressure Pi is adjusted to the value when the user gets out of bed. Therefore, discomfort when the user goes back to sleep is suppressed. It is convenient that there is no need to perform an operation to set the internal pressure Pi (firmness setting) to suppress discomfort. A comfortable air mattress is thus provided.

[0077] (Second Implementation)

[0078] In the second embodiment, in addition to the first action OP1 and the second action OP2 described above, the control unit 72 also performs the third action described below.

[0079] For example, after the internal pressure Pi of the air chamber 11 meets the first condition mentioned above, the control unit 72 may further perform a third action.

[0080] In the third action, the control unit 72 performs at least one of the energy-saving action and the maintenance action.

[0081] When the first condition is met, for example, corresponding to getting out of bed, the air mattress 110 automatically switches to energy-saving operation. Alternatively, when the first condition is met, the air mattress 110 switches to maintenance operation. In maintenance operation, the control unit 72, for example, causes the pump unit 31 to operate at high output to dry the air chamber unit 10. The output of maintenance operation is, for example, higher than the output of the second operation OP2, etc. In maintenance operation, the noise is, for example, greater than that of the second operation OP2, etc.

[0082] In the second embodiment, for example, when the second value P2 is stored in the storage unit 78, a third action different from the second action OP2 is performed. In the second embodiment, a more comfortable and convenient inflatable mattress can be provided. For example, the third action can be performed at a predetermined time. For example, the third action can also be started using a timer or the like.

[0083] In an embodiment, pump unit 31 may also include DC pump 31d (see reference). Figure 1(c)). PWM (Pulse Width Modulation) control can also be implemented by using a DC pump 31d. An example of PWM control will be explained below.

[0084] Figure 4 (a) and Figure 4 (b) is a schematic diagram illustrating the operation in an air mattress according to an exemplary embodiment.

[0085] The horizontal axis of these graphs represents time tm. The vertical axis represents the strength SigC of the PWM control signal. Figure 4 (a) Corresponds to the case where the duty cycle Dt is 65%. Figure 4 (b) For the case where the duty cycle Dt is 35%. For example, a PWM control signal is supplied to the DC pump 31d from the control unit 72 or the drive circuit controlled by the control unit 72. The supply and exhaust volume of the DC pump 31d to the air chamber 11 can be controlled according to the ratio of the period of the high intensity SigC state of the PWM control signal to the period of the low intensity SigC state.

[0086] Figure 5 This is a coordinate graph illustrating the actions within an air mattress according to an example implementation.

[0087] Figure 5 The horizontal axis represents the duty cycle Dt. The vertical axis represents the supply pressure and exhaust pressure Pr (kPa). For example... Figure 5 As shown, when the duty cycle Dt is high, the supply air pressure and exhaust air pressure Pr increase. By controlling the duty cycle Dt of the PWM control, the pump's supply air volume and exhaust air volume can be controlled.

[0088] In this embodiment, pump unit 31 may also include an AC pump. The internal pressure of the air chamber 11 can be controlled by the operation of the AC pump. In this case, for example, the output of the AC pump (e.g., supply pressure and exhaust pressure Pr) can be controlled by the voltage applied to the AC pump. In the AC pump, the applied voltage can be switched using phase control. However, in phase control, the desired operation is sometimes difficult to achieve due to frequency deviations.

[0089] By using PWM control of a DC pump, the output can be precisely controlled according to the required supply and exhaust pressures, essentially unaffected by AC power fluctuations (such as frequency deviations). For example, the output can be minimized. For example, compared to using an AC pump, the noise generated can be reduced by using PWM control of a DC pump. For example, the generated noise can be minimized. Therefore, for example, better sleep comfort can be provided.

[0090] The following is an example of the operation of the air mattress 110.

[0091] Figure 6 This is a flowchart illustrating the operations in an air mattress according to an example implementation.

[0092] like Figure 6 As shown, the power is turned on (step S101). This, for example, switches to initialization mode (step S102). In initialization mode, for example, the internal pressure (pressure Pr) of the air chamber 11 is set to a predetermined value (e.g., 5 kPa). In initialization mode, the user sits on the air chamber 10. For example, in this state, the internal pressure (pressure Pr) is set to a predetermined value.

[0093] Switch to normal mode (step S103). For example, it may also switch to sleep mode based on the user's state or based on the reception of the operation by the receiving unit 60 (step S131). In sleep mode (step S131), return to normal mode based on the reception of the "end" operation, or based on the user's state, or based on the reception of the operation by the receiving unit 60 (step S103).

[0094] In normal mode, for example, a sensor check is performed (step S104). Internal pressure is confirmed (detected) (step S105). Furthermore, it is determined whether the currently set (stored) state is "out of bed" or "in bed" (step S106). The "set (stored) state" is, for example, the state at the end of the last operation (e.g., step S111 described later). For example, the initial set (stored) state of the air mattress 110 could also be "in bed." In step S106, if the state is "out of bed," the process proceeds to step S121 described later. If the state is "in bed," the process proceeds to step S107.

[0095] 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 "leaving the bed", and the internal pressure at this time is stored as "leaving the bed internal pressure" (step S109). Afterwards, for example, a specified standby time (e.g., 12 hours) is performed (step S111).

[0096] In step S107, if it is determined that the internal pressure has not dropped significantly, it is then determined whether the internal pressure has dropped (step S108). If it is determined that the internal pressure has not dropped, proceed to step S111.

[0097] If the internal pressure drops as determined in step S108, gas is supplied until the internal pressure is set (step S110). Then, proceed to step S111.

[0098] In step S106, if the condition is determined to be "out of bed," in step S121, it is determined whether the internal pressure has decreased. If the internal pressure has not decreased, it is determined whether the internal pressure has increased (step S122). If the internal pressure has not increased, proceed to step S111. If the internal pressure has increased, it is considered to be "bedridden," and the "out of bed internal pressure" is eliminated (step S124, for example, initializing the storage). Afterward, proceed to step S111.

[0099] In step S121, if it is determined that the internal pressure has dropped, air is supplied until the "bed internal pressure" is reached (step S123). After that, proceed to step S111.

[0100] This action is performed, for example, by a control device 70 (or control unit 72).

[0101] In steps S106 to S110 and steps S121 to S124, etc., the following can also be applied: Figure 2 The action described.

[0102] According to the implementation method, a more comfortable air mattress can be provided.

[0103] (Third Implementation)

[0104] The air mattress of the third embodiment (e.g., air mattress 110: see reference) Figure 1 (a)~ Figure 1 (c) The control unit 72 includes an air chamber 10 and an air chamber 11. The air chamber 10 includes an air chamber 11, and the control unit 72 controls the internal pressure Pi of the air chamber 11. An example of the operation of the control unit 72 in the third embodiment will be described below. In the following description, for example, the internal pressure Pi of the air chamber 11 is detected by a pressure sensor 31s. The control unit 72 acquires data (or signals) about the internal pressure Pi detected by the pressure sensor 31s.

[0105] Figure 7 (a)~ Figure 7 (c) is a schematic diagram illustrating the operation of the air mattress according to the third embodiment.

[0106] Figure 7 (a)~ Figure 7 (c) The horizontal axis represents time tm. The vertical axis represents the internal pressure Pi of air chamber 11.

[0107] like Figure 7As shown in (a), in one example, at time ta0, the internal pressure Pi is high, with a value of Pax2. At time ta0, the user is on the air mattress 110. At time tx, the internal pressure Pi drops sharply. At time tx, the user gets off the bed. At the first time ta1, the control unit 72 acquires data about the internal pressure Pi (internal pressure Pa1). If there is no abnormality in the data about the internal pressure Pi at this time, the control unit 72 does not perform the action described later, and time tm elapses. In this example, at time ty, the internal pressure Pi rises sharply. At time ty, the user begins to be on the air mattress 110. In this example, at the second time ta2, the control unit 72 acquires data about the internal pressure Pi. If there is no abnormality in the data about the internal pressure Pi at this time, the control unit 72 does not perform the action described later, and time tm elapses. This action is repeated.

[0108] That is, the moments of the first time (time ta0, first time ta1, and second time ta2) become the moments of the second time (time tb0, first time tb1, and second time tb2), and are repeated. For example, the time tm from time ta0 to second time ta2 corresponds to the period T. The period T is, for example, 24 hours. The time from time ta0 to first time ta1 is half of the period T, i.e., 12 hours. The time from first time ta1 to second time ta2 is half of the period T, i.e., 12 hours.

[0109] In one example, time ta0 is, for instance, 22:00 on the first day. The first time ta1 is 10:00 on the second day. The second time ta2 is 22:00 on the second day.

[0110] In this example, every half of period T, the control unit 72 performs an action SO to acquire data about the internal pressure Pi. Action SO is a monitoring action of the internal pressure Pi.

[0111] When the acquired internal pressure Pi (internal pressure P1) is lower than a predetermined value, the control unit 72 may also perform an air supply operation PO to the air chamber 11. For example, the control unit 72 controls the pump unit 31 to supply air to the air chamber 11. At this time, for example, if the time of operation SO is during the day, the air supply operation PO is performed. For example, if the time of operation SO is at night, the air supply operation PO can be omitted.

[0112] exist Figure 7 In example (a), the internal pressure Pa1 at the first moment ta1 is essentially the same as the value Pax1 (reference value). For example, the absolute value of the difference ΔQ1 between the internal pressure Pa1 and the value Pax1 at the first moment ta1 is less than the "value determined for the difference". In this case, the gas supply operation PO is not performed. The value Pax1 is, for example, the "internal pressure when leaving the bed". The "internal pressure when leaving the bed" can also be stored in the storage unit 78, etc. Figure 7(a) Corresponds to the state when there is no abnormality in air chamber 11.

[0113] like Figure 7 As shown in (a), the control unit 72 can also perform the action SC of acquiring data on rapid changes in the internal pressure Pi. Figure 7 (b) and Figure 7 In (c), the illustration of action SC is omitted for easier viewing.

[0114] like Figure 7 (b) shows another example where, at time ta0, the internal pressure Pi is value Pax2. At time tx, the internal pressure Pi drops sharply. At the first time ta1, the control unit 72 acquires data about the internal pressure Pi (internal pressure Pa1). In this example, the internal pressure Pa1 at the first time ta1 is significantly lower than the value Pax1 (e.g., "internal pressure upon bed exit"). For example, sometimes there are abnormalities such as holes in the air chamber 11, causing an abnormal drop in internal pressure Pi.

[0115] For example, the absolute value of the difference ΔQ1 between the internal pressure Pa1 and the value Pax1 at the first moment ta1 is greater than or equal to the value determined for the difference. In this case, the control unit 72 shortens the interval of the monitoring action (action SO) of the internal pressure Pi. Figure 7 In example (b), after the first moment ta1 when monitoring the internal pressure Pi, at Figure 7 In example (a), the second moment ta2 of the next internal pressure Pi is monitored. This allows for a more precise understanding of the state of the air chamber 11. For instance, in the event of an anomaly such as a hole in the air chamber 11, the anomaly can be detected more quickly, and the system can be restored to a reasonable state more rapidly.

[0116] For example, a threshold (first threshold Pt1) is determined for the internal pressure Pa1 at the first time ta1. The first threshold Pt1 is, for example, a value that is "determined difference" lower than the "internal pressure at bed exit". The internal pressure Pa1 at the first time ta1 is compared with the first threshold Pt1, and based on the result, the control unit 72 changes the next monitoring time ta2.

[0117] Thus, in the third embodiment, the control unit 72 acquires the internal pressure Pa1 at the first time ta1 and the internal pressure Pa2 at the second time ta2 after the first time ta1. The time from the first time ta1 to the second time ta2 when the internal pressure Pa1 at the first time ta1 is above the first threshold Pt1 is set as the first time length tp1 (refer to...). Figure 7 (a)). The time from the first time ta1 to the second time ta2 when the internal pressure Pa1 at the first time ta1 is lower than the first threshold Pt1 is set as the second time length tp2 (refer to). Figure 7(b)). In this embodiment, the second time length tp2 when the internal pressure Pa1 is below the first threshold Pt1 is shorter than the first time length tp1 when the internal pressure Pa1 is above the first threshold Pt1. Therefore, for example, the state of the air chamber 11 can be more accurately assessed. Abnormal states of the air chamber 11 can be detected quickly, and the air chamber 11 can be restored to a reasonable state more rapidly. A more comfortable air mattress can be provided.

[0118] like Figure 7 As shown in (b), for example, when the internal pressure Pa1 of ta1 is lower than the first threshold Pt1 at the first moment, the control unit 72 performs the gas supply operation PO to the air chamber 11.

[0119] Alternatively, a threshold (second threshold Pt2) can be determined based on the internal pressure Pa1 at the second time ta2. The second threshold Pt2 is, for example, a value that is "a determined difference" from the "internal pressure at bed exit". The second threshold Pt2 can also be the same as the first threshold Pt1. When the internal pressure Pa2 at the second time ta2 is lower than the second threshold Pt2, the control unit 72 can also perform an air supply operation PO to the air chamber 11.

[0120] like Figure 7 As shown in (b), the control unit 72 acquires the internal pressure Pi at the third time ta3, after the second time ta2. Figure 7 In example (b), the third time ta3 is time tb0.

[0121] In one implementation, the internal pressure Pa2 at the second time ta2 can be compared with the second threshold Pt2, and the third time ta3 can be changed based on the comparison result. Figure 7 In the example shown in (b), the internal pressure Pa2 at the second time ta2 is above the second threshold Pt2. On the other hand, if the internal pressure Pa2 at the second time ta2 is below the second threshold Pt2, the following explanation is also possible. Figure 7 (c) action.

[0122] like Figure 7 As shown in (c), in another example, at time ta0, the internal pressure Pi is the value Pax2. At time tx, the internal pressure Pi drops sharply. At the first time ta1, the control unit 72 acquires data about the internal pressure Pi. In this example, the internal pressure Pa1 at the first time ta1 is lower than the first threshold Pt1, and the time from the first time ta1 to the second time ta2 is the second time length tp2. Figure 7 In example (c), the internal pressure Pa2 at the second time ta2 is lower than the second threshold Pt2. In this case, the control unit 72 makes the next monitored third time ta3 earlier than... Figure 7(b) The third moment ta3. Therefore, the state of air chamber 11 can be more accurately monitored. For example, air chamber 11 can be restored to a suitable state more quickly. This allows for a more comfortable air mattress.

[0123] When the internal pressure Pa2 at the second time ta2 is above the second threshold Pt2, the time from the second time ta2 to the third time ta3 is set as the third time length tp3 (refer to...). Figure 7 (b)). The time from the second time ta2 to the third time ta3 when the internal pressure Pa2 at the second time ta2 is lower than the second threshold Pt2 is set as the fourth time length tp4 (refer to). Figure 7 (c) The fourth time length tp4 when the internal pressure Pa2 is below the second threshold Pt2 is shorter than the third time length tp3 when the internal pressure Pa2 is above the second threshold Pt2. For example, it allows the air chamber 11 to return to a reasonable state more quickly. It can provide a more comfortable air mattress.

[0124] For example, the fourth time length tp4 is shorter than the second time length tp2. For example, the fourth time length tp4 is more than 0.3 times but less than 0.8 times the second time length tp2. For example, the fourth time length tp4 is more than 0.45 times but less than 0.55 times the second time length tp2. For example, the fourth time length tp4 is essentially half the second time length tp2.

[0125] For example, the fourth time length tp4 is more than 0.3 times and less than 0.8 times the third time length tp3. For example, the fourth time length tp4 is more than 0.45 times and less than 0.55 times the third time length tp3. For example, the fourth time length tp4 is essentially half the third time length tp3.

[0126] For example, the second time length tp2 is more than 0.3 times and less than 0.8 times the first time length tp1. For example, the second time length tp2 is more than 0.45 times and less than 0.55 times the first time length tp1. For example, the second time length tp2 is essentially half of the first time length tp1.

[0127] For example, the first time length tp1 is 12 hours. For example, the second time length tp2 is 6 hours. The third time length tp3 is 6 hours. For example, the fourth time length tp4 is 3 hours.

[0128] By establishing such a relationship, it becomes easy, for example, to set the first time ta1 for monitoring the internal pressure Pi during the day. In case of an anomaly, it is easy to set the second time ta2 for monitoring the internal pressure Pi to the time before bedtime. Figure 7 (b)).

[0129] When the internal pressure Pa1 of the first time ta1 is lower than the first threshold Pt1, the control unit 72 may also perform a notification operation. When the internal pressure Pa2 of the second time ta2 is lower than the second threshold Pt2, the control unit 72 may perform a notification. The notification may include, for example, at least one of display and sound wave. The notification may also include, for example, a "message" displayed by the display unit of the receiving unit 60, etc.

[0130] As already described, the air mattress 110 includes a pressure sensor 31s that detects the internal pressure Pi. The control unit 72 acquires the internal pressure Pi detected by the pressure sensor 31s. Acquiring the internal pressure Pi may also include control of the detection operation of the pressure sensor 31s by the control unit 72.

[0131] In the third embodiment, the actions described for the first or second embodiment may also be further implemented.

[0132] According to the first to third embodiments, a more comfortable air mattress can be provided.

[0133] The implementation method may also include the following structure.

[0134] (Structure 1)

[0135] An air mattress includes: an air chamber portion comprising air chambers; and a control unit that controls the internal pressure of the air chambers. When the internal pressure of the air chambers satisfies a first condition and then a second condition, the control unit performs a first action. The first condition includes: the internal pressure changes from a first value to a second value lower than the first value, the difference between the first value and the second value is greater than or equal to a first threshold, and the rate of change of the internal pressure from the first value to the second value with respect to time is greater than or equal to a second threshold. The second condition includes: after the internal pressure decreases from the first value to the second value, the internal pressure changes to a third value lower than the second value, the difference between the second value and the third value is greater than or equal to a third threshold. In the first action, the control unit causes the internal pressure to change towards the second value.

[0136] (Structure 2)

[0137] According to the air mattress of structure 1, when the internal pressure of the air chamber meets a third condition, the control unit performs a second action, the third condition including: the internal pressure rises to a fourth value higher than the second value, the difference between the fourth value and the second value is greater than or equal to a fourth threshold, and in the second action, the control unit causes the internal pressure to change toward the first value or a set fifth value.

[0138] (Structure 3)

[0139] The air mattress according to structure 1 or 2 further includes a storage section for storing the first value and the second value.

[0140] (Structure 4)

[0141] According to the air mattress described in structure 3, it further includes a receiving unit for receiving user input. When the receiving unit receives an input that changes the internal pressure of the air chamber, the first value and the second value stored in the storage unit are reset.

[0142] (Structure 5)

[0143] The air mattress according to any one of structures 1 to 4 further comprises a sensor for detecting the first value and the second value.

[0144] (Structure 6)

[0145] According to any one of structures 1 to 5, in an air mattress, after the internal pressure of the air chamber satisfies the first condition, the control unit further performs a third action, in which the control unit performs at least one of an energy-saving action and a maintenance action.

[0146] (Structure 7)

[0147] An inflatable mattress includes: an air chamber portion comprising an air chamber; and a control portion controlling the internal pressure of the air chamber. The control portion acquires the internal pressure at a first moment and acquires the internal pressure at a second moment after the first moment. When the internal pressure at the first moment is lower than the first threshold, a second time length from the first moment to the second moment is shorter than a first time length from the first moment to the second moment when the internal pressure at the first moment is higher than the first threshold.

[0148] (Structure 8)

[0149] According to the air mattress of structure 7, when the internal pressure at the first moment is lower than the first threshold, the control unit supplies air to the air chamber.

[0150] (Structure 9)

[0151] According to the air mattress described in structure 7 or 8, the control unit supplies air to the air chamber when the internal pressure at the second moment is lower than the second threshold.

[0152] (Structure 10)

[0153] According to the air mattress described in structure 7 or 8, the control unit acquires the internal pressure at a third time after the second time, and the fourth time length from the second time to the third time when the internal pressure at the second time is lower than a second threshold is shorter than the third time length from the second time to the third time when the internal pressure at the second time is higher than the second threshold.

[0154] (Structure 11)

[0155] According to the air mattress of structure 10, the fourth time length is shorter than the second time length.

[0156] (Structure 12)

[0157] According to the air mattress of structure 11, the fourth time length is more than 0.3 times and less than 0.8 times the second time length.

[0158] (Structure 13)

[0159] According to any one of structures 10 to 12, the air mattress wherein the fourth time length is more than 0.3 times and less than 0.8 times the third time length.

[0160] (Structure 14)

[0161] According to any one of structures 7 to 13, the air mattress wherein the second time length is more than 0.3 times and less than 0.8 times the first time length.

[0162] (Structure 15)

[0163] According to any one of structures 9 to 14, in the air mattress, the control unit issues a notification when the internal pressure at the second moment is lower than the second threshold.

[0164] (Structure 16)

[0165] According to any one of structures 7 to 15, in the air mattress, the control unit issues a notification when the internal pressure at the first moment is lower than the first threshold.

[0166] (Structure 17)

[0167] The air mattress according to any one of structures 7 to 16, wherein the first time length is 12 hours and the second time length is 6 hours.

[0168] (Structure 18)

[0169] The air mattress according to any one of structures 7 to 17 further includes a sensor for detecting the internal pressure, and the control unit acquires the internal pressure detected by the sensor.

[0170] As described above, embodiments of the present invention have been explained with reference to specific examples. However, the present invention is not limited to these specific examples. For example, regarding the specific structure of each element, such as the air chamber and control unit included in an air mattress, those skilled in the art can appropriately select from the known range and implement the present invention in the same manner, as long as the same effect can be obtained, and such implementation is included within the scope of the present invention.

[0171] To the extent technically possible, any combination of two or more elements in each specific example is also included within the scope of this invention, provided that it encompasses the spirit of the invention.

[0172] Furthermore, all air mattresses that are appropriately modified and implemented based on the air mattresses described above as embodiments of the present invention also fall within the scope of the present invention, as long as they include the spirit of the present invention.

[0173] Furthermore, within the scope of the present invention, various modifications and alterations can be conceived by those skilled in the art, and it should be understood that these modifications and alterations also fall within the scope of the present invention.

[0174] Explanation of reference numerals in the attached figures

[0175] 10: Air chamber section; 11: Air chamber; 11p: Pipe; 31: Pump section; 31d: DC pump; 31s: Pressure sensor; 40: Upper buffer pad section; 60: Receiving section; 61, 62: Display input section; 68: Cable; 70: Control device; 72: Control section; 78: Storage section; ΔP1~ΔP3: Difference; ΔQ1: Difference; 110, 119: Air mattress; Dt: Duty cycle; OP1, OP2: First and second actions; P1~P5: First value~Fifth value; PO: Air supply action; Pa1, P a2: Internal pressure; Pax1, Pax2: Values; Pi: Internal pressure; Pr: Pressure; Pt1, Pt2: First and second thresholds; Q1: Absolute value; SC: Action; SO: Action; SigC: Intensity; T: Period; t1~t7: First moment to seventh moment; ta0: Time; ta1~ta3: First moment to third moment; tb0: Time; tb1, tb2: First and second moments; tm: Time; tp1~tp4: First time length to fourth time length; tx, ty: Time.

Claims

1. An inflatable mattress, comprising: Air chamber section, the air chamber section including an air chamber; and A control unit that controls the internal pressure of the air chamber; The control unit detects the user's departure from the bed based on the change in internal pressure. When the user is detected leaving the bed, the control unit detects air leakage from the air chamber based on the change in internal pressure. When an air leak is detected, the control unit performs a first action. In the first action, the control unit causes the internal pressure to rise. When the internal pressure meets the first condition, the control unit determines that the user has left the bed. When the second condition is met after the internal pressure satisfies the first condition, the control unit performs the first action. The first condition includes: The internal pressure changes from a first value to a second value lower than the first value, the difference between the first value and the second value is greater than or equal to a first threshold, and the rate of change of the internal pressure from the first value to the second value with respect to time is greater than or equal to a second threshold. The second condition includes: after the internal pressure drops from the first value to the second value, the internal pressure becomes a third value lower than the second value, and the difference between the second value and the third value is greater than or equal to a third threshold. When the internal pressure of the air chamber meets the third condition, the control unit performs the second action. The third condition includes: the internal pressure rises to a fourth value higher than the second value, and the difference between the fourth value and the second value is above a fourth threshold. In the second action, the control unit causes the internal pressure to change toward the first value or a set fifth value.

2. The air mattress according to claim 1, wherein, It also has a storage unit for storing the first value and the second value.

3. The air mattress according to claim 2, wherein, It also has a receiving unit for receiving user input. When the receiving unit receives an input that changes the internal pressure of the air chamber, the first value and the second value stored in the storage unit are reset.

4. The air mattress according to any one of claims 1 to 3, wherein, It also has a sensor for detecting the first value and the second value.

5. The air mattress according to any one of claims 1 to 3, wherein, After the internal pressure of the air chamber meets the first condition, the control unit further performs a third action. In the third action, the control unit performs at least one of the energy-saving action and the maintenance action.

6. The air mattress according to claim 4, wherein, After the internal pressure of the air chamber meets the first condition, the control unit further performs a third action. In the third action, the control unit performs at least one of the energy-saving action and the maintenance action.

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