JP2017169802A - Fluid cell type mattress - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid cell type mattress having a new structure, stably supporting the human body when loading on an outer peripheral end by taking an upright sitting position, and achieving excellent tactile sensation in contact with the outer peripheral end in a sleeping state.SOLUTION: A fluid cell type mattress 10 in which at least part of a support face 11 for placing a user is formed by an extensible and contractible support cell 12 including a fluid chamber 18 in the inside is such that: an extensible and contractible auxiliary cell 22 including an auxiliary fluid chamber 29 in the inside is provided in the outer peripheral end of the support face 11; the auxiliary fluid chamber 29 of the auxiliary cell 22 and the fluid chamber 18 of the support cell 12 are communicated with each other; and a vertically penetrating vent hole 36 is formed in at least one upper or lower wall part of the auxiliary fluid chamber 29 in the auxiliary cell 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a mattress that constitutes a support surface that is laid on the upper surface of a bed and on which a user is placed, and in particular, at least a part of the support surface includes a fluid cell that includes a fluid chamber therein. It relates to a mattress.

  Conventionally, fluid cell mattresses have been proposed for the purpose of improving sleeping comfort by dispersing body pressure. As described in, for example, Japanese Patent No. 5339873 (Patent Document 1), the fluid cell mattress is configured by a support cell that can extend and contract, and a support surface that supports a user includes a fluid chamber therein. Then, the support cell is deformed according to the load (weight) exerted on the support surface by the user, so that the contact pressure (body pressure) of the support surface acting on the user is dispersed, and the sleeping comfort is achieved. Improvements have been realized.

  By the way, in the fluid cell type mattress of Patent Document 1, when a user sits on the outer peripheral end of the mattress, or when a user or a caregiver (nurse) pokes a knee or a hand to the outer peripheral end of the mattress. For example, in order to suppress the deformation of the support surface and achieve stable support, the outer peripheral end portion of the mattress is made of urethane foam that is difficult to deform.

  However, when the outer peripheral edge of the mattress is made of a hard urethane foam or the like, when the user touches the outer peripheral edge of the mattress by turning over on the mattress, the uncomfortable feeling of sleeping due to a foreign object poses a problem. There was a fear.

  If the outer periphery of the mattress is also made of flexible support cells, the user can avoid foreign objects when touching, but it can be supported stably by deformation of the support cells when sitting on the edge or holding hands. There was a problem that it became difficult to stand up from an end-sitting posture, and it was difficult to keep the posture with a knee or a hand.

Japanese Patent No. 5339873

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is that the human body is stably supported when loaded on the outer peripheral end portion by the end seat or the like, and in the sleeping state. An object of the present invention is to provide a fluid cell mattress having a novel structure that realizes a good tactile sensation upon contact with an outer peripheral end.

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

  That is, the first aspect of the present invention is a fluid cell type mattress in which at least a part of a support surface on which a user is placed is constituted by a support cell that is provided with a fluid chamber inside and can be expanded and contracted. An auxiliary cell that is provided with an auxiliary fluid chamber and that can be expanded and contracted is provided at an outer peripheral end of the support surface, and the auxiliary fluid chamber of the auxiliary cell and the fluid chamber of the support cell communicate with each other. In addition, a vent hole penetrating vertically is formed in at least one of the upper and lower walls of the auxiliary fluid chamber in the auxiliary cell.

  According to the fluid cell type mattress having the structure according to the first aspect, air is supplied to and discharged from the auxiliary fluid chamber through the vent hole in the open state of the vent hole formed in the auxiliary cell. Cell deformation is easily allowed. Therefore, for example, when the user comes into contact with the auxiliary cell by turning over or the like, the deformation characteristics of the auxiliary cell are softened by opening the vent hole, and a sense of incongruity at the time of contact is avoided.

  Further, in a state in which the vent hole formed in the auxiliary cell is blocked, the supply and discharge of air through the vent hole to the auxiliary fluid chamber is restricted, so that the deformation of the auxiliary cell is restricted by the action of the air spring. . Therefore, when sitting on the auxiliary cell or when placing a hand or knee on the auxiliary cell, the auxiliary cell becomes difficult to deform due to the ventilation holes being blocked, and it is stably supported on the auxiliary cell. The

  Moreover, since the vent hole is formed in at least one of the upper and lower walls of the auxiliary fluid chamber in the auxiliary cell, the vent hole is in a communicating state when contacting the auxiliary cell obliquely, for example, by turning over. The air hole is closed when the sensor is placed on the auxiliary cell at the time of sitting on the edge. Therefore, a complicated system is not required for switching between communication and blockage of the air holes, and the deformation characteristics of the auxiliary cell can be switched with a simple structure.

  According to a second aspect of the present invention, in the fluid cell type mattress described in the first aspect, the auxiliary cell has an intermediate film disposed in the auxiliary fluid chamber and functions as an expansion / contraction auxiliary chamber on both sides of the intermediate film. The expansion / contraction auxiliary chamber of the auxiliary cell and the fluid chamber of the support cell communicate with each other, and the working chamber of the auxiliary cell has the intermediate film On the other hand, elastic means capable of exerting a pressing force toward the expansion / contraction assisting chamber is accommodated.

  According to the 2nd aspect, the expansion / contraction deformation | transformation of a support cell is accept | permitted with a bigger stroke by the fluid chamber of a support cell and the expansion / contraction auxiliary chamber of an auxiliary cell mutually communicating. Furthermore, the elastic means accommodated in the working chamber presses the intermediate film toward the expansion / contraction assisting chamber, whereby the air in the expansion / contraction assisting chamber can be efficiently discharged, and the support cell can be expanded more quickly. It is possible to improve the followability of the support surface with respect to the movement of the user on the support surface. When the expansion / contraction auxiliary chamber and the working chamber are formed inside the flexible outer membrane, a flexible auxiliary cell can be realized with a simple structure, and the user directly or indirectly contacts the auxiliary cell. It is possible to reduce or avoid discomfort.

  According to a third aspect of the present invention, in the fluid cell type mattress described in the second aspect, the vent hole penetrating the wall portion of the working chamber is formed in the wall portion of the auxiliary fluid chamber in the auxiliary cell. Is formed.

  According to the third aspect, it is possible to prevent the air in the fluid chamber of the support cell from being discharged through the vent hole when the vent hole is communicated, and to switch between the hard deformation characteristic and the soft deformation characteristic of the auxiliary cell, and the support surface. Excellent body pressure dispersion performance can be obtained stably.

  According to a fourth aspect of the present invention, in the fluid cell type mattress described in any one of the first to third aspects, the vent hole is blocked by being superimposed on a wall portion of the auxiliary fluid chamber in the auxiliary cell. A film is provided.

  According to the fourth aspect, by providing the film, the opening portion of the air hole is easily blocked, and the hard cell can be stably deformed at the time of end seating.

  According to a fifth aspect of the present invention, in the fluid cell mattress described in the fourth aspect, the film is superposed on the outer surface of the wall portion of the auxiliary fluid chamber in the auxiliary cell.

  According to the fifth aspect, when the internal pressure of the auxiliary fluid chamber rises due to, for example, a person coming into contact with the auxiliary cell, the film is easily separated from the opening of the vent hole so that the vent hole is in a communication state. The flexible deformation characteristics of the auxiliary cell are effectively realized. On the other hand, when a downward external force is applied to the auxiliary cell when sitting on the edge or the like, the film is pressed against the opening of the vent hole and the vent hole is blocked with the film, so that the hard cell has a hard deformation characteristic. The

  According to a sixth aspect of the present invention, in the fluid cell mattress described in the fourth aspect, the film is superimposed on the inner surface of the wall portion of the auxiliary fluid chamber in the auxiliary cell.

  According to the sixth aspect, when a downward external force is applied to the auxiliary cell at the time of end seating or the like, the internal pressure of the auxiliary fluid chamber increases, so that the film adheres to the opening of the vent hole, and the vent hole becomes a film. It is blocked by. In this way, the air holes are stably blocked by the film, and the hard deformation characteristics of the auxiliary cell are advantageously realized.

  According to a seventh aspect of the present invention, in the fluid cell type mattress described in any one of the fourth to sixth aspects, the film is partially formed with respect to a wall portion of the auxiliary fluid chamber in the auxiliary cell. It is fixed.

  According to the 7th aspect, a film is positioned with respect to the opening position of a vent hole, and switching of the communication of a vent hole and interruption | blocking by a film is implement | achieved stably over a long period of time.

  According to an eighth aspect of the present invention, in the fluid cell type mattress described in any one of the fourth to seventh aspects, between the film and the wall of the auxiliary fluid chamber in the auxiliary cell, A gap that is blocked by the action of an external force is formed.

  According to the 8th aspect, the soft deformation characteristic of an auxiliary cell is implement | achieved by a ventilation hole being maintained in a communication state through a clearance gap. Further, since the gap is closed when an external force is applied such as when seating on the edge, the vent hole is blocked, and the hard cell has a hard deformation characteristic.

  According to a ninth aspect of the present invention, in the fluid cell type mattress described in the eighth aspect, the gap is formed by an elastic porous body disposed between the film and a wall portion of the auxiliary fluid chamber in the auxiliary cell. Is formed.

  According to the 9th aspect, the flexible deformation characteristic of an auxiliary | assistant cell is implement | achieved by maintaining a ventilation hole in a communicating state through the hole of a sponge-like elastic porous body. In addition, when an external force is applied such as when seated, the elastic porous body is compressed and the pores of the elastic porous body are crushed to close the gaps, so that the air holes are closed and the auxiliary cell has a hard deformation characteristic. Realized.

  According to a tenth aspect of the present invention, in the fluid cell type mattress described in the eighth or ninth aspect, the film is waved, and the film and a wall portion of the auxiliary fluid chamber in the auxiliary cell are provided. The gap is formed between the two.

  According to the tenth aspect, since the film has a corrugated shape, the vent hole is maintained in a communicating state through the gap between the film and the wall of the auxiliary fluid chamber in the auxiliary cell. Flexible deformation characteristics are realized. In addition, when an external force is applied such as when sitting on the edge, the film is deformed flat and the gap is closed, so that the air holes are blocked and the hard cell has a hard deformation characteristic.

  An eleventh aspect of the present invention is the fluid cell mattress according to any one of the first to tenth aspects, wherein the vent hole is formed in an upper wall portion of the auxiliary fluid chamber in the auxiliary cell. It is what.

  According to the eleventh aspect, since the vent hole opens upward, it is easy to maintain the communication state, and the soft deformation characteristic of the auxiliary cell is effectively realized.

  A twelfth aspect of the present invention is the fluid cell mattress according to any one of the first to eleventh aspects, wherein the vent hole is formed in a lower wall portion of the auxiliary fluid chamber in the auxiliary cell. It is what has been.

  According to the twelfth aspect, since the vent hole opens downward, it is easy to be blocked by being covered with a bed or the like disposed below the auxiliary cell. The characteristics are effectively realized.

  According to a thirteenth aspect of the present invention, in the fluid cell type mattress described in any one of the first to twelfth aspects, one is provided on at least one of the upper and lower walls of the auxiliary fluid chamber in the auxiliary cell. The vent is formed.

  According to the thirteenth aspect, the opening and blocking of the vent hole can be clearly switched easily, and the soft deformation characteristic of the auxiliary cell in the communication state and the hard deformation characteristic of the auxiliary cell in the blocking state are clearly switched. Can be.

  According to a fourteenth aspect of the present invention, in the fluid cell type mattress described in any one of the first to thirteenth aspects, a plurality of upper and lower walls of the auxiliary fluid chamber in the auxiliary cell have a plurality of portions. The vent is formed.

  According to the fourteenth aspect, the deformation characteristics (hardness of the auxiliary cell are changed by changing the number of vent holes communicated and the number of closed vent holes depending on the magnitude and direction of input to the auxiliary cell. ) Can be changed continuously or stepwise. As a result, for example, when the user touches the auxiliary cell by turning over, the auxiliary cell is gradually hardened as it moves to the auxiliary cell side to prevent the user from falling off the support surface. It becomes possible.

  According to the present invention, in the open state of the vent hole formed in the auxiliary cell, air is supplied to and discharged from the auxiliary fluid chamber through the vent hole, thereby realizing the soft deformation characteristics of the auxiliary cell and the auxiliary cell. In the state where the formed vent hole is closed, the supply and discharge of air through the vent hole to the auxiliary fluid chamber is restricted, so that the deformation of the auxiliary cell is restricted by the action of the air spring, and the auxiliary cell is hard. Deformation characteristics are realized. Therefore, when touching the auxiliary cell by turning over or the like, the feeling of foreign matter can be reduced by a soft tactile sensation, and stable support can be realized when it is placed on the auxiliary cell when sitting on the edge. In addition, since the vent hole is formed in at least one of the upper and lower walls of the auxiliary fluid chamber in the auxiliary cell, it is possible to switch the communication and blocking of the vent hole with a simple structure.

The perspective view which shows the fluid cell type mattress as 1st embodiment of this invention. The perspective view which shows the fluid cell type mattress of FIG. 1 from another angle. The top view of the fluid cell type mattress shown in FIG. The front view of the fluid cell type mattress shown in FIG. The fragmentary longitudinal cross-section of the fluid cell type mattress shown in FIG. The disassembled perspective view of the fluid cell type mattress shown in FIG. The exploded front view of the fluid cell type mattress shown in FIG. The fragmentary longitudinal cross-section which shows the fluid cell type mattress as 2nd embodiment of this invention. The fragmentary longitudinal cross-section which shows the fluid cell type mattress as 3rd embodiment of this invention. The longitudinal cross-sectional view which shows the principal part of the auxiliary cell which comprises the fluid cell type mattress as another one Embodiment of this invention. The longitudinal cross-sectional view which shows the principal part of the auxiliary cell which comprises the fluid cell type mattress as another one Embodiment of this invention. The longitudinal cross-sectional view which shows the principal part of the auxiliary cell which comprises the fluid cell type mattress as another one Embodiment of this invention.

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

  1-4, a fluid cell type mattress (hereinafter referred to as a mattress) 10 is shown as a first embodiment of a body pressure support cushion having a structure according to the present invention. The mattress 10 includes a plurality of support cells 12 that constitute a support surface 11. In the following description, the up-down direction means the up-down direction in FIG.

  More specifically, as shown in FIG. 5, the support cell 12 has a hollow structure including a fluid chamber 18 between an upper outer film 14 and a lower outer film 16 formed of a flexible film such as a synthetic resin. In addition, a support elastic body 20 as an elastic body is accommodated in the fluid chamber 18. In the present embodiment, the upper outer membrane 14 has a reverse concave shape that opens downward, the lower outer membrane 16 has a substantially flat membrane shape, and the opening of the upper outer membrane 14 is the lower outer membrane 16. The fluid chamber 18 is formed between the upper outer membrane 14 and the lower outer membrane 16 by being covered. The supporting elastic body 20 disposed in the fluid chamber 18 is a porous elastic body having open cells, and is formed of, for example, a foamed urethane foam having a high foaming rate.

  The support cell 12 is allowed to expand and contract in the vertical direction with the deformation of the upper outer membrane 14 being allowed by the inflow and discharge of air into the fluid chamber 18. The fluid in the fluid chamber 18 may be a gas other than air or may be a liquid. However, since the fluid is preferably a compressible fluid, an impact load is applied depending on the compressibility of the fluid. The cushioning property at the time of action can be improved, and the acting force on the outer membranes 14 and 16 can be reduced by the compressibility of the fluid at the time of loading, so that the durability and load bearing performance can be improved.

  Further, a plurality of support cells 12 are integrally formed. That is, a plurality of support cells 12 arranged in the width direction (left and right direction in FIG. 3) of the mattress 10 are arranged, and the plurality of support cells 12 arranged in the width direction have their upper and outer films 14 connected to each other. These lower outer membranes 16 are connected to each other and integrally formed. In the present embodiment, a plurality of support cells 12 are arranged side by side in the length direction (vertical direction in FIG. 3) of the mattress 10, and the plurality of support cells 12 arranged in the length direction are also arranged above them. The outer membrane 14 is integrally connected to each other, and the lower outer membrane 16 is integrally connected to each other.

  On the other hand, auxiliary cells 22 are arranged on the left and right outer sides of the plurality of support cells 12 arranged in the width direction. In the auxiliary cell 22, an intermediate film 28 made of a flexible synthetic resin film or the like is disposed between an upper outer film 24 and a lower outer film 26 made of a flexible synthetic resin film or the like. It has a structure. Further, an intermediate film 28 is disposed in an auxiliary fluid chamber 29 formed between the upper outer film 24 and the lower outer film 26, and the auxiliary fluid chamber 29 is partitioned by the intermediate film 28. Each of the expansion / contraction auxiliary chamber 30 and the working chamber 32 is formed. The expansion / contraction auxiliary chamber 30 and the working chamber 32 are variable in volume by deformation of the outer membranes 24 and 26 and the intermediate membrane 28, whereby the auxiliary cell 22 can be expanded and contracted.

  In the present embodiment, the upper outer membrane 24 has a reverse concave shape that opens downward like the upper outer membrane 14 of the support cell 12, and the lower outer membrane 26 is the same as the lower outer membrane 16 of the support cell 12. The auxiliary fluid chamber 29 is formed between the upper outer membrane 24 and the lower outer membrane 26 by covering the opening of the upper outer membrane 24 with the lower outer membrane 26. . In addition, the intermediate film 28 of the present embodiment has a reverse concave shape that opens downward. In the present embodiment, the intermediate film 28 has substantially the same shape as the upper outer film 24. In this embodiment, the expansion / contraction auxiliary chamber 30 is formed on the upper side of the intermediate film 28 and the working chamber 32 is formed on the lower side. However, the expansion / contraction auxiliary chamber 30 and the working chamber 32 are formed of the intermediate film. It can also be arranged upside down with respect to 28.

  The action chamber 32 accommodates an action elastic body 34 as elastic means. In this embodiment, the working elastic body 34 is made of a sponge substantially the same as the support elastic body 20 of the support cell 12, and cost reduction and simplification of manufacturing and management are achieved by sharing parts. .

  Here, in the lower outer membrane 26 constituting a part of the wall portion of the working chamber 32 in the auxiliary cell 22, a vent hole 36 penetrating vertically is formed. The vent hole 36 of the present embodiment has a substantially circular cross section, and only one is formed in the central portion of the lower wall portion of the working chamber 32. The vent hole 36 preferably has a hole cross-sectional area not less than 1/6 and not more than 1/4 with respect to the area of the lower wall portion of the working chamber 32, so that the vent hole 36 is open to the atmosphere. The film 38, which will be described later, is effectively blocked while ensuring the air flow rate.

  The volume change of the working chamber 32 is permitted by the inflow and outflow of fluid through the vent hole 36, and in the non-input state of the load, the intermediate film 28 is moved to the initial position by the action elastic body 34 (in this embodiment, The expansion / contraction assisting chamber 30 is held at a position where the volume is minimized. In FIG. 5, for easy understanding, the intermediate film 28 is shown in a state of moving to the working chamber 32 side.

  Further, a film 38 is fixed to the lower wall portion of the working chamber 32 in the auxiliary cell 22. The film 38 is formed with an area larger than the opening area of the vent hole 36, is a flexible synthetic resin thin film, and is preferably formed of a material with low gas permeability. As shown in FIGS. 2 and 5, the film 38 is provided so as to cover the opening of the vent hole 36 of the auxiliary cell 22 by being overlapped and partially fixed to the lower outer surface of the auxiliary cell 22. The vent hole 36 can be closed, and the vent hole 36 can be communicated away from the bright rear portion of the vent hole 36. As shown in FIGS. 2 and 6, the film 38 of the present embodiment has a longitudinal belt shape extending across the plurality of auxiliary cells 22 arranged in the length direction, and is below the plurality of auxiliary cells 22 arranged in the length direction. The inner end in the width direction of the film 38 is fixed to the lower outer surface of each auxiliary cell 22 and is superposed on the outer surface, and the other part of the film 38 can be separated from the lower outer surface of each auxiliary cell 22. ing.

  In this way, the film 38 is partially fixed to the auxiliary cell 22, so that the air hole 36 has a communication state in which the film 38 is opened to the atmosphere away from the lower outer surface of the auxiliary cell 22, and the auxiliary cell. 22 can be switched to a shut-off state covered with a film 38 that is in close contact with the lower outer surface. In the communication state of the vent hole 36, the working chamber 32 is opened to the atmosphere through the vent hole 36 to allow expansion / contraction of the auxiliary cell 22, while in the shut-off state of the vent hole 36, the working chamber 32 is sealed. Therefore, the expansion / contraction of the auxiliary cell 22 is limited by the action of the air spring. As a result, a soft deformation characteristic is realized in the auxiliary cell 22 in the communication state of the vent hole 36, and a relatively hard deformation characteristic is realized in the auxiliary cell 22 in the communication state of the air hole 36.

  The film 38 may be provided independently for each of the plurality of auxiliary cells 22 arranged in the length direction. Specifically, for example, a substantially square film 38 may be fixed to the lower outer surfaces of the plurality of auxiliary cells 22. In this case, in the film 38, the inner end and the four corners in the width direction are partially fixed to the lower outer surface of the auxiliary cell 22, so that the communication state and the blocking state of the vent hole 36 are selectively realized. The

  The auxiliary cells 22 having such a structure are disposed on both the left and right sides of the support cell 12 and constitute end seats at both the left and right ends of the mattress 10. The auxiliary cell 22 is integrally connected to the support cell 12 arranged side by side in the width direction. That is, the upper outer membrane 24 of the auxiliary cell 22 and the upper outer membrane 14 of the support cell 12 are integrally connected to each other in the width direction, and the lower outer membrane 26 of the auxiliary cell 22 and the lower outer membrane of the support cell 12 are formed. 16 are connected to each other in the width direction and integrally formed.

  Further, the plurality of auxiliary cells 22 arranged side by side in the length direction are integrally connected to each other. That is, the upper and outer films 24 of the plurality of auxiliary cells 22 arranged in the length direction are integrally connected to each other, and the lower outer films 26 of the plurality of auxiliary cells 22 arranged in the length direction are connected to each other and integrated. Is formed.

  In the present embodiment, an upper sheet 40 in which the upper outer membrane 14 of the plurality of support cells 12 and the upper outer membrane 24 of the plurality of auxiliary cells 22 are integrally formed, and the lower outer membrane 16 and the plurality of support cells 12 are formed. A plurality of support cells 12 and a plurality of auxiliary cells 22 are integrally connected by a lower sheet 42 in which the lower outer membrane 26 of the auxiliary cells 22 is continuously formed integrally and fixed in an overlapping manner. Has been.

  Further, in the present embodiment, the intermediate films 28 of the plurality of auxiliary cells 22 arranged side by side in the length direction are integrally connected to each other. In other words, between the upper sheet 40 and the lower sheet 42, an intermediate sheet 44 including a plurality of intermediate films 28 arranged in the length direction is disposed at both ends in the width direction. The upper and lower sheets 40 and 42 are superposed in contact with each other and fixed by means such as welding. In addition, the intermediate sheet 44 is separated from the upper sheet 40 and overlapped and fixed to the lower sheet 42 in a contact state at a portion where the second communication path 52 described later is formed.

  Further, an adhering portion 46 is provided between the plurality of support cells 12 and the plurality of auxiliary cells 22 in the upper sheet 40. That is, as shown in FIG. 3, the adhering portion 46 extends between the upper outer film 14 of the adjacent support cell 12 and the upper outer film 24 of the auxiliary cell 22 and is in contact with the lower sheet 42. They are superposed and fixed by means such as welding. In the present embodiment, the upper outer membrane 14 of the support cell 12 and the upper outer membrane 24 of the auxiliary cell 22 are substantially rectangular in plan view, so that the fixing portions 46 extend in a substantially lattice shape.

  Further, as shown in FIG. 5, a first communication passage 48 is formed between the support cells 12 and 12 adjacent in the width direction so as to communicate the fluid chambers 18 and 18 of the support cells 12 and 12 with each other. ing. Specifically, in the fixing portion 46 of the upper sheet 40, a first groove 50 extending in the width direction is formed at a portion located between the support cells 12 and 12 in the width direction. The first communication passage 48 is formed between the fixed portion 46 of the upper sheet 40 and the lower sheet 42 by covering the 50 openings with the lower sheet 42.

  Then, both ends of the first communication passage 48 are opened in the wall surfaces of the fluid chambers 18, 18 of the support cells 12, 12 adjacent in the width direction, so that the fluid chambers 18, 18 are connected to the first communication passage 48. Are in communication with each other. In the present embodiment, as shown in FIG. 3, the first communication passages 48 are respectively formed between the width directions of all the support cells 12, and the fluid chambers 18 of all the support cells 12 aligned in the width direction are the first ones. One communication path 48 communicates. The cross-sectional area of the first communication passage 48 is smaller than the cross-sectional area of the fluid chamber 18, and the fluid chambers 18 and 18 of the support cells 12 and 12 adjacent in the width direction are narrowed. The communication paths 48 communicate with each other.

  Further, as shown in FIG. 5, between the support cell 12 and the auxiliary cell 22 adjacent in the width direction, the fluid chamber 18 of the support cell 12 and the expansion / contraction auxiliary chamber 30 of the auxiliary cell 22 communicate with each other. The communication path 52 is formed. Specifically, a second groove 54 extending in the width direction is formed in the fixing portion 46 of the upper sheet 40 between the support cell 12 and the auxiliary cell 22 in the width direction, and the opening of the second groove 54 is formed. By covering the portion with the lower sheet 42, the second communication path 52 is formed between the fixing portion 46 of the upper sheet 40 and the lower sheet 42.

  Then, both ends of the second communication passage 52 are opened to the wall surface of the fluid chamber 18 of the support cell 12 adjacent in the width direction and the wall surface of the expansion / contraction auxiliary chamber 30 of the auxiliary cell 22, so that the fluid chamber 18 The expansion / contraction assisting chamber 30 communicates with each other through the second communication passage 52. The cross-sectional area of the second communication passage 52 is smaller than the cross-sectional areas of the fluid chamber 18 and the expansion / contraction auxiliary chamber 30, and the expansion / contraction of the fluid chamber 18 and the auxiliary cell 22 of the support cell 12 adjacent in the width direction. The auxiliary chambers 30 are communicated with each other by a narrowed second communication path 52.

  As is apparent from the above description, the outer membranes 14 and 16 of the support cells 12 and 12 adjacent in the width direction connected to the wall portion of the first communication passage 48 and the first communication passage 48 are: They are integrally formed with each other. Further, the outer membranes 14 and 16 of the support cells 12 and the outer membranes 24 and 26 of the auxiliary cells 22 that are adjacent to each other in the width direction and connected to the wall portion of the second communication passage 52 are mutually connected. Are integrally formed.

  6 and 7, the mattress 10 of the present embodiment includes an upper sheet 40, a lower sheet 42, a pair of left and right intermediate sheets 44 and 44, a pair of left and right films 38 and 38, and a plurality of sheets. The support elastic body 20 and a plurality of action elastic bodies 34 are configured. That is, the action elastic body 34 is inserted into each of the intermediate films 28 of the intermediate sheets 44, 44, and the intermediate sheets 44, 44 are superimposed on the left and right end portions of the lower sheet 42 from the upper side. Is fixed to the lower sheet 42 over the entire circumference by means such as welding. Further, the films 38, 38 are superposed on the left and right ends of the lower sheet 42 from the lower side, and the inner ends in the width direction of the respective films 38 are partially fixed to the lower sheet 42 by means such as welding. Furthermore, the support elastic body 20 is inserted into each upper outer membrane 14 located in the middle of the left and right sides of the upper sheet 40, and each middle of the intermediate sheets 44, 44 with respect to each upper outer membrane 24 located at the left and right ends. The film 28 and the working elastic body 34 are inserted, and the periphery of the upper outer film 24 and the intermediate film 28 are fixed to each other by means such as welding. Then, the periphery of each upper outer membrane 14 (adhering portion 46) in the upper sheet 40 is fixed to the lower sheet 42 by means such as welding, so that the plurality of support cells 12 and the plurality of auxiliary cells 22 are integrally provided. A mattress 10 is formed.

  Further, when the upper sheet 40 is fixed to the lower sheet 42 and the intermediate sheet 44, the first sheet is fixed by avoiding the formation of the first concave groove 50 and the second concave groove 54 in the upper sheet 40. The communication path 48 and the second communication path 52 can be easily provided without requiring special parts.

  As shown in FIG. 5, the mattress 10 having the structure according to the present embodiment is laid so that the lower sheet 42 is overlaid on the upper surface of the bed 56. Use it by lying down on it. In the mattress 10 of the present embodiment, the support surface 11 is configured by a plurality of support cells 12 and auxiliary cells 22.

  In such a use state, the support load of the user is input downward with respect to the upper outer membrane 14 into the support cell 12 at the portion of the support surface 11 of the mattress 10 where the user is placed and supported. Thereby, the support cell 12 is compressed up and down, and the air in the fluid chamber 18 of the support cell 12 moves through the first communication path 48 to the fluid chamber 18 of another support cell 12 having a small input load. Thereby, the vertical deformation of the support cell 12 is allowed by the movement of air between the fluid chambers 18. Therefore, the support surface 11 of the mattress 10 is deformed so as to equalize the body pressure distribution of the user, and an improvement in sleeping comfort due to dispersion of body pressure is realized.

  Further, in the present embodiment, the fluid chambers 18 of the plurality of support cells 12 arranged side by side in the width direction are connected to each other by the first communication passage 48, and air movement between the fluid chambers 18 is performed. Is generated in the width direction of the mattress 10. Thereby, when the user on the support surface 11 moves in the width direction by turning over or the like, the deformation of the support cell 12 on which the user is placed before the movement and the contraction of the support cell 12 on which the user is placed after the movement are performed. The deformation is caused smoothly by the movement of air between the fluid chambers 18 and 18 of the support cells 12 and 12 arranged side by side in the width direction. Therefore, the deformation of the support cell 12 is caused to highly follow the movement of the user in the width direction on the support surface 11, and the user can easily move in the width direction without being blocked by the support cell 12. Can move.

  In addition, the first communication passage 48 that connects the fluid chambers 18 of the plurality of support cells 12 to each other is a narrow passage having a small cross-sectional area, and air is allowed to move between the fluid chambers 18 in a suppressed manner. Therefore, an uncomfortable floating feeling of the user due to a sudden deformation of the support surface 11 is avoided. In addition, since the support surface 11 is composed of a large number of support cells 12, the area of the upper surface of each support cell 12 constituting the support surface 11 can be reduced, and the fluid flow in each fluid chamber 18 can be reduced. This limits the amount of deformation that occurs on the upper surface of each support cell 12. Therefore, destabilization of the support surface 11 due to the deformation of the support cell 12 is avoided, and stable support and good sleeping comfort of the user can be realized.

  Furthermore, even when a large load is input outside the body pressure acting region of the user on the support surface 11, the movement of the air in the first communication path 48 is restricted, thereby preventing rapid deformation of the support surface 11. Is done. Therefore, for example, when a person other than the user puts his / her hand or knee on the support surface 11, the support surface 11 can be effectively supported, and the user can be prevented from being pushed up due to sudden deformation of the support surface 11. .

  The expansion / contraction auxiliary chambers 30 of the auxiliary cells 22 provided at both ends in the width direction of the mattress 10 are communicated with the fluid chambers 18 of the support cells 12 through the second communication passages 52. When the pressure in the fluid chamber 18 of the support cell 12 rises due to the input of the support load, the air in the fluid chamber 18 flows into the expansion / contraction auxiliary chamber 30 of the auxiliary cell 22 through the second communication passage 52, and the expansion / contraction auxiliary chamber. Since the pressure of 30 increases, the intermediate film 28 moves downward against the elasticity of the action elastic body 34, and the volume of the expansion / contraction auxiliary chamber 30 is expanded. In short, in the expansion / contraction auxiliary chamber 30 of the auxiliary cell 22, the inflow of air from the fluid chamber 18 is allowed, and the ease of the inflow of air is adjusted by the elasticity of the action elastic body 34.

  Thus, in addition to the movement of air between the fluid chambers 18 of the plurality of support cells 12, the movement of air between the fluid chamber 18 of the support cell 12 and the expansion / contraction assisting chamber 30 of the auxiliary cell 22, The deformation of the support cell 12 is allowed, and a large deformation allowable amount (up / down stroke) of the support cell 12 is ensured, so that the dispersion of body pressure is advantageously realized. In particular, in the present embodiment, since the auxiliary cells 22 are disposed on both sides in the width direction of the plurality of support cells 12 arranged in the width direction, the deformation allowable amount of the plurality of support cells 12 is determined as a pair of left and right auxiliary cells 22. , 22 can be set larger.

  Further, when the support load acting on the support surface 11 is reduced or released, the internal pressure of the expansion / contraction assisting chamber 30 is reduced, and the intermediate film 28 is expanded or contracted by the elastic restoring force of the acting elastic body 34. Is pressed. Thereby, the air of the expansion / contraction auxiliary chamber 30 moves to the fluid chamber 18 of the support cell 12, and each support cell 12 compressed by the support load extends vertically. In this embodiment, when the support load acting on the support surface 11 is reduced or released, the support cell 12 is extended by the elasticity of the support elastic body 20 disposed in the fluid chamber 18. The rapid shape restoration is realized by the cooperation of the elasticity of the support elastic body 20 and the elasticity of the action elastic body 34. Thus, since the vertical dimension of the support cell 12 changes following the change of the input load quickly, the support area of the user is increased, and the dispersion of body pressure is advantageously realized. In addition, even when the user moves on the support surface 11 and the action position of the support load changes in the length direction, the shape is restored as described above in the portion where the support load is reduced or released. Can occur. In addition, when the shape of the working chamber 32 is restored based on the elasticity of the working elastic body 34, inflow of air from the atmosphere to the working chamber 32 is allowed.

  Further, in the mattress 10, when the user or a caregiver sits on both ends in the width direction of the mattress 10 or puts hands or knees on both ends in the width direction of the mattress 10, the auxiliary cell 22 is compressed and deformed. The amount is limited. That is, when a person is placed on both ends in the width direction of the mattress 10 constituted by the auxiliary cell 22 and a downward load is input to the auxiliary cell 22, the lower surface of the auxiliary cell 22 is pressed against the upper surface of the bed 56. Thus, the vent hole 36 of the auxiliary cell 22 is closed by the loading of the human body. Thereby, the expansion / contraction auxiliary chamber 30 of the auxiliary cell 22 is sealed and air is sealed in the expansion / contraction auxiliary chamber 30, so that the volume change of the expansion / contraction auxiliary chamber 30 is limited by the air spring action, and the auxiliary cell 22 Compressive deformation in the direction is limited. As a result, the person on the auxiliary cell 22 can be stably supported when putting a hand or knee on the edge or in the width direction end.

  Further, in the present embodiment, when an external force due to human loading acts on the auxiliary cell 22, the air hole 36 of the auxiliary cell 22 is blocked by the gas impermeable film 38. Thereby, it becomes easy to prevent air leakage through the vent hole 36, and the deformation of the auxiliary cell 22 is more effectively prevented.

  Furthermore, since the air holes 36 are formed in the lower wall portion of the auxiliary cell 22 and the film 38 is fixed to the lower surface of the auxiliary cell 22, the film 38 is flat when an external force is applied by an end seat or the like. Since the upper surface 56 is pressed against the peripheral edge of the opening of the air hole 36, the air hole 36 is stably blocked by the film 38.

  Further, when the user rolls over or the like and moves in the width direction on the support surface 11 and comes into contact with the auxiliary cell 22, a diagonally downward force inclined with respect to the vertical direction acts on the auxiliary cell 22. When the auxiliary cell 22 and the film 38 are deformed by the action of the external force, the air hole 36 is released from being blocked by the film 38, and the air hole 36 is switched to the communication state. As a result, the working chamber 32 is opened to the atmosphere through the vent hole 36 and the volume change of the working chamber 32 is allowed, so that the auxiliary cell 22 can be easily deformed. As a result, the soft deformation characteristics of the auxiliary cell 22 are realized, and the uncomfortable feeling when contacting the auxiliary cell 22 is reduced.

  In addition, in the present embodiment, the working chamber 32 independent of the fluid chamber 18 of the support cell 12 is opened to the atmosphere through the vent hole 36, so that the air in the fluid chamber 18 passes through the vent hole 36 to the atmosphere. The cushioning property of the support cell 12 is maintained when the vent hole 36 communicates.

  Further, since the film 38 is fixed to the outer surface of the lower wall portion of the auxiliary cell 22, an external force acts on the auxiliary cell 22 to increase the internal pressure of the working chamber 32, thereby causing the film 38 to move to the lower wall of the auxiliary cell 22. It becomes easy to leave the part. Therefore, the soft deformation characteristic of the auxiliary cell 22 due to the opening of the air hole 36 is easily realized.

  Further, since one vent hole 36 is formed in the approximate center of the lower wall portion of the auxiliary cell 22, the vent hole 36 is selectively selected from either a state where it is closed by a film 38 or a state where it is opened. By switching, it becomes easy to switch the deformation characteristics of the auxiliary cell 22 between a sufficiently soft state and a sufficiently hard state.

  FIG. 8 shows a mattress 60 as a second embodiment of the present invention. The mattress 60 includes a plurality of support cells 62 and a plurality of auxiliary cells 64. In addition, in the following description, about the member and site | part grasped | ascertained substantially the same as 1st embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol. Further, in the mattress 60, the portions not shown in FIG. 8, the arrangement of the support cells 62 and the auxiliary cells 64, and the like can be the same as in the first embodiment.

  The support cell 62 has a structure in which a reverse-concave upper outer membrane 14 that opens downward and a concave lower outer membrane 66 that opens upward are fixed to each other at their openings. Is provided with a fluid chamber 18. Further, the fluid chamber 18 accommodates a support elastic body 20 as an elastic body. In this embodiment, the upper portion of the support elastic body 20 is inserted into the recess of the upper outer membrane 14 and the lower portion is the lower portion. It is inserted into the recess of the outer membrane 66.

  The auxiliary cell 64 has a structure in which a reverse concave upper outer membrane 24 opening downward and a concave lower outer membrane 68 opening upward are fixed to each other at their openings. An auxiliary fluid chamber 29 is formed between the outer membrane 24 and the lower outer membrane 68. Further, an intermediate film 28 is disposed between the upper outer film 24 and the lower outer film 68, the working chamber 32 is formed on the upper side across the intermediate film 28, and the expansion / contraction auxiliary chamber 30 is formed on the lower side. The action chamber 32 accommodates an action elastic body 34 as an elastic means.

  In addition, a single vent hole 36 penetrating vertically is formed in the upper wall portion of the working chamber 32 in the auxiliary cell 64, and the working chamber 32 can be opened to the atmosphere through the vent hole 36. Further, a film 38 that covers the opening of the air hole 36 is fixed to the upper wall portion of the working chamber 32 in the auxiliary cell 64. In the present embodiment, the film 38 is partially fixed to the upper outer surface of the auxiliary cell 64, and the film 38 can be separated from the upper outer surface of the auxiliary cell 64 in an unfixed portion. Thereby, in a state where the film 38 is in close contact with the upper and outer surfaces of the auxiliary cell 64, the air hole 36 is closed by the film 38, and the working chamber 32 is substantially sealed, while at least a part of the film 38 is at the auxiliary cell 64. In the state away from the upper outer surface, the vent hole 36 is opened to the atmosphere, and the air in the working chamber 32 can be discharged into the atmosphere. In addition, in FIG. 8, the one aspect | mode of the film 38 in the state which left | separated from the upper outer surface of the auxiliary cell 64 is illustrated with the dashed-two dotted line.

  The mattress 60 having the structure according to the present embodiment can also switch the deformation characteristics of the auxiliary cells 64, reduce the uncomfortable feeling at the time of contact due to the difference in the deformation characteristics of the auxiliary cells 64, and end seats. Stable support at times is realized. In particular, since the vent hole 36 is opened upward, the vent hole 36 is relatively easy to open when the person touches the auxiliary cell 64 by turning over or the like, and the auxiliary cell 64 is softly deformed. The characteristics are effectively realized.

  FIG. 9 shows a mattress 70 as a third embodiment of the present invention. The mattress 70 includes a plurality of support cells 62 and a plurality of auxiliary cells 72. The support cell 62 includes the upper outer membrane 14 and the lower outer membrane 66 as in the second embodiment, and the support elastic body 20 in the fluid chamber 18 is omitted.

  The auxiliary cell 72 includes the upper outer membrane 24 and the lower outer membrane 68 as in the second embodiment, the auxiliary fluid chamber 29 is formed therein, and the intermediate membrane 28 and the working elastic body 34 are omitted. ing. Further, the upper outer membrane 24 of the auxiliary cell 72 is formed with a vent hole 36 penetrating vertically through the upper wall portion of the auxiliary fluid chamber 29, and the inner surface of the upper wall portion of the auxiliary fluid chamber 29 in the auxiliary cell 72. A film 74 is superposed on and fixed to the film.

  The film 74 is a flexible thin film formed of a synthetic resin or the like, similar to the film 38 of the above-described embodiment. In the present embodiment, the film 74 has a substantially square shape, and is formed with respect to the upper wall portion of the auxiliary fluid chamber 29. The outer peripheral ends are fixed at a part or a plurality of parts in the circumferential direction. As a result, the film 74 is positioned with respect to the upper wall portion of the auxiliary fluid chamber 29 in the auxiliary cell 72, and a non-fixed portion can be separated from the upper wall portion of the auxiliary fluid chamber 29. Yes. In this embodiment, one side of the film 74 is fixed to the upper wall portion of the auxiliary fluid chamber 29, and the other side of the film 74 is the upper wall of the auxiliary fluid chamber 29 as shown by a two-dot chain line in FIG. It can be separated from the part.

  According to the mattress 70 having the structure according to the present embodiment, when a large downward load is input to the auxiliary cell 72 at the time of end seating or the like, the internal pressure of the auxiliary fluid chamber 29 increases. As shown by a solid line in FIG. 9, the film 74 is in close contact with the upper wall portion of the auxiliary fluid chamber 29, and the vent hole 36 is fluid-tightly closed by the film 74. Thereby, the vent hole 36 is easily maintained in a closed state, and the hard deformation characteristics of the auxiliary cell 72 are stably maintained when an external force is applied.

  On the other hand, when the user touches the auxiliary cell 72 by turning over or the like, in addition to the increase in internal pressure of the auxiliary cell 72 being smaller than that at the end seating, the input direction to the auxiliary cell 72 is in the vertical direction. Therefore, a gap is formed between the upper wall portion of the auxiliary fluid chamber 29 and the film 74 due to deformation of the upper wall portion of the auxiliary fluid chamber 29. Thereby, the ventilation hole 36 is made into a communication state, and the soft deformation characteristic of the auxiliary cell 72 is realized by discharging the air into the atmosphere.

  Thus, even in the structure in which the film 74 is fixed to the inner surface of the upper wall portion of the auxiliary fluid chamber 29, the deformation characteristics of the auxiliary cell 72 are switched by switching the communication and blocking of the vent hole 36 according to the input. Thus, a soft tactile sensation at the time of contact and a stable support at the time of loading are realized at the same time. In particular, since the film 74 is overlaid on the wall inner surface of the auxiliary fluid chamber 29, the state in which the vent hole 36 is blocked can be more stably realized.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the film 38 that closes the air hole 36 is not essential, and the air hole 36 that opens to the lower surface of the auxiliary cell 22 is covered and closed by the bed 56 when a downward external force is applied to the auxiliary cell 22 such as when sitting on the edge. It can also be done. Further, for example, the film 38 may be provided on a cover that accommodates the mattress 10.

  Further, an auxiliary vent hole penetrating the side wall portion of the auxiliary fluid chamber 29 in the auxiliary cell 22 can be formed. According to this, for example, when the external force is released in a state where the air hole 36 is blocked by the film 38, air enters the auxiliary fluid chamber 29 through the auxiliary air hole, so that the peripheral edge of the air hole 36 is opened. The sticking of the film 38 to the portion is easily avoided. In addition, when a large downward load is applied, such as when the seat is seated, the auxiliary cell 22 is compressed up and down and swells to the side, so that the auxiliary air hole is blocked by another cell and the like. Further, the inflow or discharge of air to the auxiliary fluid chamber 29 may be restricted.

  Moreover, in the said embodiment, although the structure where the auxiliary | assistant cell 22 is arrange | positioned at the right-and-left both ends of the mattress 10 is illustrated, it can also be provided in the edge part of the length direction of the mattress 10, for example. Furthermore, in the above-described embodiment, one row of auxiliary cells 22 is arranged at both left and right ends of the mattress 10, but, for example, a plurality of rows of auxiliary cells 22 may be arranged at the ends of the mattress 10, Thereby, the end seat portion can be secured in a wider area.

  In the embodiment, the vent holes 36 are formed in all the auxiliary cells 22 arranged in the length direction. For example, the auxiliary cells 22 having the vent holes 36 and the auxiliary cells 22 not having the vent holes 36 are formed. May be alternately arranged in the length direction.

  In the above-described embodiment, the structure in which the film 38 is directly superimposed on the outer surface or the inner surface of the auxiliary cell 22 is illustrated. For example, as shown in FIG. By providing a sponge layer 80 as a body, a gap 82 may be formed between the film 38 and the auxiliary cell 22. Thereby, the ventilation hole 36 is maintained in the communication state through the gap 82, and the soft deformation characteristic of the auxiliary cell 22 is easily realized at the time of contact. Further, when a large load in the vertical direction is input to the auxiliary cell 22 at the time of end seating or the like, the sponge layer 80 is compressed up and down between the film 38 and the auxiliary cell 22 to close the hole of the sponge layer 80. For this reason, the gap 82 is closed by the film 38, and the hard deformation characteristics of the auxiliary cell 22 are realized, thereby enabling stable support.

  Further, by adopting a wave-shaped film 84 as shown in FIG. 11, the communication and blocking of the air holes 36 can be switched by the deformation of the film 84. That is, the film 84 has a wavy shape extending continuously in the direction perpendicular to the paper surface in FIG. 11 in a zigzag cross section. The film 84 is in contact with the outer surface of the upper wall portion of the auxiliary fluid chamber 29 in the auxiliary cell 22 in the downwardly convex valley fold, and the other portion is above the auxiliary fluid chamber 29 in the auxiliary cell 22. A gap 86 is formed between the film 84 and the upper wall portion of the auxiliary fluid chamber 29. In the film 84, for example, one valley fold is fixed to the upper surface of the auxiliary cell 22 by means such as adhesion or welding.

  Thereby, the vent hole 36 is opened to the atmosphere through the gap 86 in a stationary state where no external force acts. Further, when a downward force is applied to the auxiliary cell 22 via the film 84 at the time of end seating or the like, the film 84 is compressed up and down and deformed flatly as shown by a two-dot chain line in FIG. As a result, the gap 86 between the upper surface of the auxiliary cell 22 and the film 84 is narrowed or closed, and the vent hole 36 is closed by the film 84, so that the hard cell 22 has a hard deformation characteristic.

  In the above embodiment, the structure in which the vent hole 36 is formed on one of the upper and lower walls of the auxiliary fluid chamber 29 in the auxiliary cell 22 is exemplified. For example, both the upper and lower walls of the auxiliary fluid chamber 29 are illustrated. A ventilation hole 36 can also be formed in the part.

  Furthermore, in the embodiment, the structure in which one vent hole 36 is formed in at least one of the upper and lower walls of the auxiliary fluid chamber 29 in the auxiliary cell 22 is illustrated. For example, as shown in FIG. A plurality of vent holes 88 may be formed in at least one of the upper and lower wall portions of the auxiliary fluid chamber 29 in FIG. According to this, since the ratio of the number of the vent holes 88 maintained in the communication state and the number of the vent holes 88 blocked by the film 38 changes according to the size and direction of the input, the auxiliary cell 22 The deformation characteristics are changed continuously or stepwise according to the input, so that a soft tactile sensation at the time of contact and a stable support such as at the end seating are realized at the same time, and for example, the auxiliary cell 22 is contacted by turning over. For example, as the user moves onto the auxiliary cell 22, more vent holes 88 are blocked and the auxiliary cell 22 becomes hard, so that the user is prevented from dropping from the fluid cell mattress. be able to.

  Further, the fluid chamber 18 of the support cell 12 and the auxiliary fluid chamber 29 of the auxiliary cell 22 are not necessarily limited to a structure that is communicated by the communication path only in the width direction of the mattress 10, for example, in the length direction of the mattress 10. You may be connected by the communicating path.

10, 60, 70: fluid cell type mattress, 11: support surface, 12, 62: support cell, 18: fluid chamber, 22, 64, 72: auxiliary cell, 28: intermediate film, 29: auxiliary fluid chamber, 30: Expansion / contraction auxiliary chamber, 32: working chamber, 34: working elastic body, 36, 88: vent hole, 38, 84: film, 52: second communication path, 80: sponge layer (elastic porous body), 82, 86: Gap

Claims (14)

A fluid cell mattress in which at least a part of a support surface on which a user is placed is constituted by a support cell that is provided with a fluid chamber therein and is extendable and contractible
An auxiliary cell which is provided with an auxiliary fluid chamber therein and which can be expanded and contracted is provided at an outer peripheral end portion of the support surface, and the auxiliary fluid chamber of the auxiliary cell and the fluid chamber of the support cell communicate with each other. And
A fluid cell type mattress, wherein a vent hole penetrating vertically is formed in at least one of the upper and lower walls of the auxiliary fluid chamber in the auxiliary cell. The auxiliary cell has a structure in which an intermediate film is disposed in the auxiliary fluid chamber, and an expansion / contraction auxiliary chamber and a working chamber are defined on both sides of the intermediate film,
The expansion / contraction auxiliary chamber of the auxiliary cell and the fluid chamber of the support cell communicate with each other;
2. The fluid cell mattress according to claim 1, wherein the working chamber of the auxiliary cell contains elastic means capable of exerting a pressing force on the intermediate film toward the expansion / contraction auxiliary chamber.   The fluid cell mattress according to claim 2, wherein the vent hole penetrating the wall portion of the working chamber is formed in a wall portion of the auxiliary fluid chamber in the auxiliary cell.   The fluid cell type mattress according to any one of claims 1 to 3, wherein a film is provided to overlap the wall portion of the auxiliary fluid chamber in the auxiliary cell to block the vent hole.   The fluid cell mattress according to claim 4, wherein the film is superimposed on an outer surface of a wall portion of the auxiliary fluid chamber in the auxiliary cell.   The fluid cell mattress according to claim 4, wherein the film is superimposed on an inner surface of a wall portion of the auxiliary fluid chamber in the auxiliary cell.   The fluid cell mattress according to any one of claims 4 to 6, wherein the film is partially fixed to a wall portion of the auxiliary fluid chamber in the auxiliary cell.   The fluid cell mattress according to any one of claims 4 to 7, wherein a gap that is blocked by the action of an external force is formed between the film and a wall portion of the auxiliary fluid chamber in the auxiliary cell. .   The fluid cell mattress according to claim 8, wherein the gap is formed by an elastic porous body disposed between the film and a wall portion of the auxiliary fluid chamber in the auxiliary cell.   The fluid cell mattress according to claim 8 or 9, wherein the film is waved and the gap is formed between the film and a wall of the auxiliary fluid chamber in the auxiliary cell.   The fluid cell mattress according to any one of claims 1 to 10, wherein the vent hole is formed in an upper wall portion of the auxiliary fluid chamber in the auxiliary cell.   The fluid cell type mattress according to any one of claims 1 to 11, wherein the vent hole is formed in a lower wall portion of the auxiliary fluid chamber in the auxiliary cell.   The fluid cell mattress according to any one of claims 1 to 12, wherein one vent hole is formed in at least one of the upper and lower walls of the auxiliary fluid chamber in the auxiliary cell.   The fluid cell mattress according to any one of claims 1 to 13, wherein a plurality of the vent holes are formed in at least one of the upper and lower walls of the auxiliary fluid chamber in the auxiliary cell.

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