JP2017144009A - Expansion cell module and cushioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expansion cell module dispensing with a pump and a pipe and enabling highly accurate control, and a cushioning device using the expansion module.SOLUTION: The expansion module includes: a cell body 2 at least vertically expanded/contracted according to a pressure of a gas to be supplied to the inside; and a gas supply mechanism 3 provided at a lower side of the cell body and capable of supplying the gas to the inside of the cell body. The gas supply mechanism includes a material container 5 that stores a gas storage material 4 for reversibly performing gas absorption and release according to a temperature and communicated to the cell body so as to be able to distribute the gas, and a temperature adjustment part 6 for adjusting the temperature of the gas storage material.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an expansion / contraction cell module and a shock absorbing device that can be used for a pressure dispersion mat that can prevent bedsores, compression wounds, and the like.

  Conventionally, a device or mat for dispersing external force may be used in combination with a body or wheelchair seating surface such as a seat or backrest, in order to buffer the displacement and pressure that the human body receives. . In particular, in home care and care settings such as hospitals and nursing homes, it is difficult for patients who are difficult to change their position or maintain their posture on their own, or for patients who need to sit or rest for treatment. Various disperse mats or disperse mattresses (hereinafter referred to as mats) are used to hold postures to prevent falls and prevent pressure wounds caused by pressure ulcers (bed slips) and medical-related equipment (to disperse pressure on the body surface) It has been.

  These mats are also used to assist in supporting the patient's posture, and are applied to local sites such as the patient's arms and waist on the operating table during surgery. Among the existing mats, the most widely used is a passive dispersion type mat manufactured using a flexible material such as polyurethane. In addition, a number of stretchable cells filled with fluid (water and air), specially designed for use on beds and wheelchair seats, are laid out in a sheet, and each cell is inflated and contracted. There is an active dispersion type mat that changes the contact surface over time to disperse the pressure.

  With regard to these two types of mats, many passive dispersion type mats have already been used in medical and nursing care fields, and the types, shapes, and construction methods of the flexible materials used for the mats are disclosed in, for example, Patent Documents 1 and 2. Is disclosed. On the other hand, with regard to an active dispersion type mat, for example, Patent Documents 3 and 4 disclose a mat that can change the pressure concentrated on a local part of the body over time by controlling the pressure in the cell with a microcomputer or the like. It is disclosed. Further, although not intended for body pressure dispersion, a technique for performing active control of a mat shape using a fluid or a hydrogen storage alloy is also proposed in Patent Document 5, for example.

JP 2005-261540 A JP 2012-254278 A JP 2008-237892 A JP 2013-70912 A JP 2003-289995 A

The following problems remain in the conventional technology.
In general, passive and distributed mats are often used at medical and nursing care sites. However, with passive dispersion mats, it is not possible to completely unload the displacement and pressure on the local body according to the patient's condition, so especially for patients who are difficult to change their position and maintain their posture by themselves. Sufficient pressure ulcer prevention effect is not obtained. On the other hand, active dispersion type mats that have been attracting attention in recent years have exhibited certain effects in wheelchair seats and bed mats. However, conventional active dispersion mats use water and air for expansion and contraction of stretchable cells, so pumps (gas and fluid supply sources) and piping (valves and joints) for feeding them are used. Etc.) was necessary. Moreover, it is limited to use on a wheelchair seat surface or bed size, and the arrangement and the number of the elastic cells constituting the mat were not expandable. For this reason, in addition to the patient and the support site, the shape and size of the mat could not be freely customized according to the use situation, such as the backrest and wall surface in addition to the wheelchair seat and bed. Therefore, for example, when a mat is required in the gap between the patient and the wheelchair to maintain the posture of the wheelchair, the active dispersion type mat cannot be applied, and the passive dispersion type mat such as polyurethane is cut to an appropriate size. The on-site response such as plugging was indispensable. Further, even in the active dispersion method, only the pressure is supported by sensing among the external forces acting on the human body, and it has not been possible to realize displacement sensing and the corresponding dispersion of the external force.
In the prior art described in Patent Document 5 using a hydrogen storage alloy, a plurality of cells are expanded simultaneously using one hydrogen storage alloy and a Peltier element. For this reason, piping for connecting multiple cells to one hydrogen storage alloy is required for more than the number of cells, and in principle, each cell cannot be controlled delicately and with high precision, and the scope of application of the technology is also limited. There was the inconvenience that it was done.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a telescopic cell module that does not require a pump or piping and can be controlled with high accuracy, and a buffer device using the same.

  The present invention employs the following configuration in order to solve the above problems. That is, the expansion / contraction cell module of the present invention is capable of supplying the gas into the cell body provided at a lower part of the cell body that can expand and contract at least in the vertical direction according to the pressure of the gas supplied to the inside. An internal gas storage material that reversibly absorbs and discharges the gas according to temperature, and communicates with the inside of the cell body so that the gas can flow therethrough. And a temperature adjusting unit for adjusting the temperature of the gas storage material.

  In the expandable cell module of the present invention, the gas supply mechanism provided in the cell main body stores therein a gas storage material that reversibly absorbs and releases the gas according to the temperature so that the gas can flow. Since the cell container itself has the material container part and the temperature adjustment part directly, the material container part communicated with the gas container and the temperature adjustment part for adjusting the temperature of the gas storage material are provided. It is not necessary to install a pipe or a pump for guiding the gas into the cell body. In addition, by eliminating the need for pipes and pumps, it is possible to save space and reduce noise, improve the degree of freedom in arrangement, improve expandability, and can be applied to various applications.

The expandable cell module according to a second invention is the expansion cell module according to the first invention, wherein the cell main body is deformable in directions other than the vertical direction, and is perpendicular to the vertical direction of the cell main body and the vertical direction and to each other. A triaxial force sensor capable of detecting a force applied in three directions with two orthogonal directions is installed in an upper portion of the cell body.
That is, in this telescopic cell module, since the three-axis force sensor is installed on the upper part of the cell body, not only the vertical force but also the shear force applied in the direction parallel to the plane perpendicular to the vertical direction is 3 It can be detected by an axial force sensor, and the displacement (deformation) in the shearing direction can also be detected to control the expansion and contraction of the cell body.

In the expandable cell module according to a third aspect of the present invention, in the first or second aspect, the material container portion is plate-shaped and fixed to a lower portion of the cell body, and the temperature adjusting portion is plate-shaped. It is characterized by being fixed in an overlapping manner on the lower part of the material container part.
That is, in this expandable cell module, the material container part is plate-shaped and fixed to the lower part of the cell body, and the temperature adjustment part is plate-shaped and fixed to the lower part of the material container part. The stacked plate-shaped material container portion and the temperature adjusting portion can reduce the size of the entire cell.

According to a fourth aspect of the present invention, there is provided a buffer device comprising: a plurality of expandable cell modules according to any one of the first to third aspects; and the temperature adjusting unit of the expandable cell module connected to the cell body for each of the expandable cell modules. And a control unit that controls expansion and contraction.
That is, since this buffer device includes a plurality of the expansion cell modules and a control unit that is connected to the temperature adjustment unit of the expansion cell module and controls expansion / contraction of the cell body for each expansion cell module, complicated piping And a separate pump need not be installed, and high-precision control can be performed for each telescopic cell module.

According to a fifth aspect of the present invention, there is provided the shock absorbing device according to the fourth aspect, wherein the expansion / contraction cell module is the expansion / contraction cell module according to the second aspect, and the control unit is connected to the three-axis force sensor. The expansion and contraction of the cell body is controlled based on a signal from an axial force sensor.
That is, in this buffer device, the control unit is connected to the three-axis force sensor and controls expansion and contraction of the cell body based on the signal from the three-axis force sensor. ) Can also be performed.

According to a sixth invention, in the fourth or fifth invention, the buffer device is characterized in that a plurality of the stretchable cell modules are arranged close to each other to form a mat or a mattress as a whole.
That is, in this buffer device, since a plurality of expansion / contraction cell modules are arranged in close proximity to each other to form a mat or a mattress, an active dispersion method suitable for mats for beds and wheelchairs in the medical / nursing care field, etc. A highly accurate mat or mattress can be obtained.

The present invention has the following effects.
That is, according to the telescopic cell module and the buffer device according to the present invention, the gas supply mechanism provided in the cell body houses therein the gas storage material that reversibly absorbs and releases the gas according to the temperature. Since it has the material container part connected with the inside of a cell main body so that gas can distribute | circulate and the temperature adjustment part which adjusts the temperature of gas storage material, installation of piping or a pump becomes unnecessary.
In addition, according to the buffer device using a plurality of expansion and contraction cell modules of the present invention, since it includes a control unit that is connected to the temperature adjustment unit of the expansion and contraction cell module and controls expansion and contraction of the cell body for each expansion and contraction cell module. Complicated arrangement of a plurality of pipes and separate installation of a pump are not required, and high-precision control can be performed for each telescopic cell module.
Therefore, according to the cushioning device of the present invention, it is possible to obtain an active dispersion type high-accuracy mat or mattress suitable for a bed or a wheelchair mat in the medical / nursing care field, in particular, effective posture change and posture. Effective for retention, pressure ulcers and pressure wound prevention.

In one Embodiment of the expansion-contraction cell module and buffer device which concern on this invention, it is sectional drawing of the expansion | extension state (a) and contracted state (b) which showed the expansion-contraction cell module. In this embodiment, it is a perspective view which shows a buffer device. In this embodiment, it is a disassembled perspective view which shows an expansion-contraction cell module. In this embodiment, it is a block diagram which shows the structure of a buffer device. In this embodiment, it is explanatory drawing which shows three directions of the force which a triaxial force sensor can detect. In the present embodiment, the cell main body showing a case where the force is applied only in the vertical direction (a), a case where the force is applied in both the vertical direction and the shear direction (b), and a case where the force is applied only in the shear direction (c). FIG. In this embodiment, it is explanatory drawing which shows the case where a buffer device is applied as a mattress of a bed. It is sectional drawing which shows the state of each expansion-contraction cell module in area | region Y1 shown in FIG. In this embodiment, it is explanatory drawing which shows the case where a buffer device is applied to the support stand of a back and an arm as a lateral position support at the time of an operation. In areas Y2 and Y3 shown in FIG. 9, it is sectional drawing which shows the case (a, b) of the conventional support stand, and the case (c, d) of the support stand of this embodiment.

  Hereinafter, an embodiment of an expandable cell module and a buffer device according to the present invention will be described with reference to FIGS. 1 to 10.

As shown in FIGS. 1 and 3, the stretchable cell module 1 of the present embodiment is provided at a cell body 2 that can be stretched at least in the vertical direction according to the pressure of a gas supplied to the inside, and a lower portion of the cell body 2. And a gas supply mechanism 3 capable of supplying the gas into the cell body 2.
The gas supply mechanism 3 contains therein a gas storage material 4 that reversibly absorbs and releases the gas according to temperature, and a material container 5 that communicates with the inside of the cell body 2 so that the gas can flow. And a temperature adjusting unit 6 that adjusts the temperature of the gas storage material 4.

Further, in the expandable cell module 1 of the present embodiment, the cell body 2 can be deformed in directions other than the vertical direction, and the three directions of the vertical direction of the cell body 2 and the two directions orthogonal to the vertical direction and orthogonal to each other. A triaxial force sensor 7 capable of detecting a force applied to the cell body 2 is installed on the upper portion of the cell body 2.
The material container 5 is plate-shaped and fixed to the lower part of the cell body 2.
Further, the temperature adjusting unit 6 is formed in a plate shape and is fixed to be overlapped with the lower portion of the material container unit 5.

As shown in FIG. 2, the shock absorbing device 10 of the present embodiment is connected to the plurality of stretchable cell modules 1 and the temperature adjusting unit 6 of the stretchable cell module 1 and controls the stretch of the cell body 2 for each stretchable cell module 1. And a control unit C. In addition, in FIG. 2, although the 16 expansion-contraction cell modules 1 are installed, the number and arrangement | positioning are set suitably. In this embodiment, the three-axis force sensor 7 is mounted on each of the expansion / contraction cell modules 1, but some of the expansion / contraction cell modules may not be mounted with the three-axis force sensor 7. For example, one of two adjacent expansion / contraction cell modules may be omitted without mounting the triaxial force sensor 7, or only the expansion / contraction cell module in a part of the region may be mounted with the triaxial force sensor 7. It can also be omitted.
As shown in FIG. 4, the control unit C is connected to the triaxial force sensor 7 and has a function of controlling expansion and contraction of the cell body 2 based on a signal from the triaxial force sensor 7. In FIG. 4, the connection between one stretchable cell module 1 and the control unit C is representatively illustrated.

The temperature adjusting unit 6 includes a temperature sensor 6 a that is installed in the material container unit 5 and measures the temperature of the gas storage material 4, and a thermoelectric element 6 b such as a Peltier element. As this temperature sensor 6a, a thermistor etc. are employable, for example.
The control unit C has a function of controlling expansion and contraction of the cell body 2 based on the temperature of the gas storage material 4 connected to the temperature sensor 6a and measured by the temperature sensor 6a.

  The control unit C is configured by an IC or the like, and property information (ID of each stretchable cell module 1, arrangement of each stretchable cell module 1, etc.) is stored in a storage area. Based on the property information, the temperature signal from the temperature sensor 6a, and the force signal from the triaxial force sensor 7, the control unit C determines the expansion / contraction amount and expansion / contraction timing of each expansion / contraction cell module 1, and each expansion / contraction cell By transmitting a control signal to the temperature adjusting unit 6 of the module 1, the temperature of the gas storage material 4 is adjusted and the expansion / contraction feedback control of each expansion / contraction cell module 1 is performed.

  For example, the control unit C performs the above feedback control so that adjacent expansion / contraction cell modules 1 have mutually opposite expansion / contraction cycles, or performs feedback control that performs expansion / contraction for each column of the expansion / contraction cell modules 1. When a deviation or pressure greater than a certain threshold is sensed by the triaxial force sensor 7, the sensed expansion / contraction cell module 1 contracts to a threshold value or less regardless of the expansion / contraction period. Control such as making it happen.

The control part C and each expansion-contraction cell module 1 are connected with a wire or radio | wireless, and comprise the network. In addition, as this connection system, connection forms, such as a bus type and a star type, can be adopted, and connection of the extension cell modules 1 having different extension lengths and sizes is possible if the connection standards are the same.
As described above, the buffer device 10 of the present embodiment is configured by combining a plurality of the stretchable cell modules 1 by simple connection, and the installation space becomes complicated by the conventional fluid piping, or the piping itself is necessary. It has a very good expandability.

  As the gas storage material 4, for example, a material having a high output weight ratio such as a known hydrogen storage alloy capable of storing hydrogen as a gas can be employed. By using such a material, a pressure difference of 10 kPa or more can be generated in the cell body 2 with 1 g of alloy in a temperature range from 10 ° C. to 50 ° C.

The cell body 2 has a bellows structure that is vertically expandable and contractible with a material having high gas barrier properties such as an aluminum laminate film, and a cylindrical stretchable bag body 2a that can enclose gas therein, and the stretchable bag body 2a. And a cylindrical cover portion 2b made of a flexible and thin resin film that can cover and follow the expansion and contraction of the expansion and contraction bag body 2a. Thus, by constituting the stretchable bag body 2a with a film material having a high gas barrier property, it is possible to perform a smooth stretching operation while preventing gas leakage, and the size and the like can be freely changed.
In the upper part of the material container portion 5, a gas supply hole 3a communicating with the inside of the elastic bag body 2a via a gasket is formed.

  The triaxial force sensor 7 can employ a strain gauge sensor or the like that can detect force in three directions of shear force and vertical force generated on the contact surface, and is installed at the upper center of the elastic bag body 2a. Has been. As shown in FIGS. 5 and 6, the triaxial force sensor 7 individually detects not only the force applied in the vertical direction of the cell body 2, but also the force applied in each of the two directions orthogonal to the vertical direction and orthogonal to each other. Is possible.

  6A shows the state of the cell body 2 when a force is applied only in the vertical direction, and FIG. 6B shows the cell body 2 when the force is applied in both the vertical direction and the shearing direction. Further, FIG. 6C shows the state of the cell body 2 when applied only in the shearing direction. That is, the cell body 2 when applied in both the vertical direction and the shear direction is deformed in a direction in which the axis is curved, and the cell body 2 when applied only in the shear direction is inclined with respect to the vertical direction. Deforms in the direction of tilting.

  Next, an example of the buffer device 10 of the present embodiment in which a plurality of the stretchable cell modules 1 are arranged close to each other to constitute a mat or a mattress as a whole will be described. That is, as shown in FIGS. 7 and 8, the shock absorbing device 10 of the present embodiment is formed into a sheet shape by arranging a plurality of expandable cell modules 1, and is entirely covered with a mat cover 11. Has been.

In the present embodiment, the number, size, and arrangement of the stretchable cell modules 1 can be freely set according to the body part to be supported.
In the buffer device 10, each stretchable cell module 1 is installed in the mat cover 11 in a foldable arrangement when a human body 101 such as a patient sleeping on the bed 100 is raised up. Each stretchable cell module 1 is installed such that its upper portion contacts the human body 101 via the mat cover 11.

Usually, when the back of the mattress is lifted with the upper body of the human body when the back is raised, a shift occurs on the back side due to gravity.
With conventional mattresses, it is impossible to sense changes in external force that are largely due to displacement rather than pressure, so concentrated back forces generated around the back and waist and hips are removed or dispersed corresponding to the human body 101 such as a patient. It was difficult to make.

  In the present embodiment, as shown in FIG. 7, the three-axis force sensor 7 of the stretchable cell module 1 arranged on the back side senses the displacement, so that the stretchable cell module 1 in the stretched state around the waist and the buttocks is in a stretched state. Appropriate control can be performed accordingly. As described above, in the present embodiment, the magnitude and direction of the external force in consideration of the deviation is monitored with respect to the state of the contact surface that varies greatly depending on the body shape, posture, and situation of the patient and the like, and the external force is removed or dispersed. It is possible to respond appropriately.

  That is, the control unit C detects a change in triaxial force acting on the contact surface between the cell body 2 and the human body 101 via the mat cover 11 with the triaxial force sensor 7 and supports the posture of the human body 101. The pressure in the stretchable bag 2a is changed by the gas released and stored in the gas storage material 4 whose temperature is controlled by the temperature adjusting unit 6 so that the deviation and the pressure are dispersed, and each cell body 2 is expanded and contracted. .

  For example, in the expansion / contraction cell module 1 where the human body 101 is supported, the control unit C causes the temperature adjustment unit 6 to raise the temperature of the gas storage material 4 to release the gas from the gas storage material 4, as shown in FIG. As shown to a), the pressure in the expansion-contraction bag body 2a is raised, and the cell main body 2 is expanded. Moreover, in the expansion-contraction cell module 1 of the location which does not support the human body 101, the control part C lowers the temperature of the gas storage material 4 by the temperature adjustment part 6, and makes the gas storage material 4 absorb gas, FIG. As shown in b), the cell body 2 is contracted by reducing the pressure in the elastic bag body 2a.

  Thus, by appropriately controlling the expansion / contraction amount and expansion / contraction timing of each expansion / contraction cell module 1, it is possible to support the body position and to distribute the external force without applying an external force to the same part of the human body 101 for a long time. The human body 101 can be supported. At this time, since the gas supply to the cell body 2 is performed independently by each expansion / contraction cell module 1, the expansion / contraction of the expansion / contraction cell module 1 can be controlled with high accuracy. It is also possible to perform operations.

Next, the case where the buffer devices 21 and 31 of this embodiment are used for supporting the lateral position during surgery as shown in FIG. 9 will be described.
Conventionally, when the back and arms are fixed to a support base to fix the posture, measures have been taken to sandwich a urethane cushion on the support base to prevent pressure wounds, but this prevention method actively disperses external forces It was not a thing, and it was not possible to prevent the force from being applied to a certain place for a long time.

  On the other hand, if the buffer devices 21 and 31 are applied to the respective support parts, it is possible to prevent the force from being applied for a long period of time to maintain the body position, and of course, according to the size of the human body 101 of the user. The buffer devices 21 and 31 can be configured, and for example, it is possible to prevent a force from being applied for a long time at a location where the external force tends to concentrate at a bone protruding portion unique to the user.

  For example, as shown in FIG. 9, when buffer devices 21 and 31 are employed as the support bases installed in the region Y2 for supporting the back side of the human body 101 and the region Y3 for supporting the arms, respectively, the conventional simple support base 102 is used. In this case, as shown in FIGS. 10A and 10B, a partial gap is generated between the back and arms of the human body 101, whereas the buffer devices 21 and 31 of the present embodiment are used. If it exists, as shown to (c) and (d) of FIG. 10, a clearance gap will not arise by each expansion-contraction cell module 1 expanded appropriately, but the back and the whole arm can be supported stably.

  As described above, in the expandable cell module 1 of the present embodiment, the gas supply mechanism 3 provided in the cell body 2 stores therein the gas storage material 4 that reversibly absorbs and releases the gas according to the temperature. Since it has the material container part 5 connected with the inside of the cell main body 2 so that gas can distribute | circulate and the temperature adjustment part 6 which adjusts the temperature of the gas storage material 4, the material container part 5 and temperature are provided in a cell module single-piece | unit. Since the adjustment unit 6 is directly provided, it is not necessary to install a pipe or a pump for guiding the gas into the cell body 2. In addition, by eliminating the need for pipes and pumps, it is possible to save space and reduce noise, improve the degree of freedom in arrangement, improve expandability, and can be applied to various applications.

Further, since the triaxial force sensor 7 is installed on the upper part of the cell body 2, not only the vertical force but also the shear force applied in the direction parallel to the plane perpendicular to the vertical direction is a triaxial force sensor. 7, and the displacement (deformation) in the shearing direction can also be detected to control the expansion and contraction of the cell body 2.
In addition, the material container portion 5 is plate-shaped and fixed to the lower portion of the cell body 2, and the temperature adjustment portion 6 is plate-shaped and fixed to the lower portion of the material container portion 5. The plate-shaped material container portion 5 and the temperature adjusting portion 6 can reduce the size of the entire cell.

Therefore, in the buffer device 10, 21, 31 of this embodiment, the expansion and contraction of the cell body 2 is controlled for each of the expansion and contraction cell modules 1 connected to the plurality of expansion and contraction cell modules 1 and the temperature adjustment unit 6 of the expansion and contraction cell module 1. Since the control part C is provided, complicated arrangement | positioning of several piping and the separate installation of a pump become unnecessary, and highly accurate control is attained for every expansion-contraction cell module.
Further, since the control unit C is connected to the triaxial force sensor 7 and controls the expansion and contraction of the cell body 2 based on the signal from the triaxial force sensor 7, the displacement (deformation) in the shear direction for each cell body 2 is performed. ) Can also be performed.

  In particular, in the buffer devices 10, 21, and 31, a plurality of the expansion cell modules 1 are arranged in close proximity to each other to form a mat or mattress as a whole. An active dispersion type high-precision mat or mattress suitable for a bed or a wheelchair mat in a field can be obtained.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Telescopic cell module, 2 ... Cell main body, 3 ... Gas supply mechanism, 4 ... Gas storage material, 5 ... Material container part, 6 ... Temperature control part, 7 ... Triaxial force sensor 10, 21, 31 ... Buffer Device, C ... control unit

Claims (6)

A cell body that can expand and contract at least vertically according to the pressure of the gas supplied to the inside;
A gas supply mechanism provided at a lower portion of the cell body and capable of supplying the gas into the cell body;
The gas supply mechanism stores therein a gas storage material that reversibly absorbs and releases the gas according to temperature, and a material container portion that communicates with the inside of the cell body so that the gas can flow therethrough,
The expansion-contraction cell module characterized by having a temperature adjustment part which adjusts the temperature of the said gas storage material. The stretchable cell module according to claim 1, wherein
The cell body can be deformed in a direction other than the vertical direction,
A triaxial force sensor capable of detecting a force applied in three directions, ie, a vertical direction of the cell main body and two directions orthogonal to the vertical direction and perpendicular to each other, is installed on the upper portion of the cell main body. Telescopic cell module. The stretchable cell module according to claim 1 or 2,
The material container part is plate-shaped and fixed to the lower part of the cell body,
The expansion / contraction cell module, wherein the temperature adjusting part is formed in a plate shape and is fixed to overlap with a lower part of the material container part. A plurality of stretchable cell modules according to any one of claims 1 to 3,
A buffer device comprising: a control unit connected to the temperature adjustment unit of the expansion cell module and controlling expansion / contraction of the cell body for each expansion cell module. The buffer device according to claim 4,
The stretchable cell module is the stretchable cell module according to claim 2,
The said control part is connected to the said 3-axis force sensor, and controls the expansion-contraction of the said cell main body based on the signal from the said 3-axis force sensor, The buffer device characterized by the above-mentioned. The buffer device according to claim 4 or 5,
A cushioning device, wherein a plurality of the stretchable cell modules are arranged close to each other to constitute a mat or a mattress as a whole.

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