JP3228060U - mattress - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mattress having a structure in which the peripheral portion of the mattress is provided with rigidity, the stability of sitting on the edge and the stability of getting up are improved, and the ease of turning over is also improved. SOLUTION: A central block 2 arranged at the center of a mattress 1 in the width direction and supporting at least the back and waist of a supine user and a user in a supine position arranged at both ends of the mattress 1 in the width direction. A mattress 1 comprising a mattress unit 4 having an end block 3 that supports at least the shoulders of the central block 2, which is formed more flexibly than the outer peripheral edge of the end block 3 and has an end. The portion block 3 is adjusted so that a hardness gradient is formed in which the apparent hardness gradually decreases toward the direction of contact with the central block 2, and the apparent hardness of the portion block 3 is adjusted so as to be in contact with the shoulder of the user in the supine position. A hardness adjusting means 5 for adjusting the hardness to be lower than the apparent hardness of the central block 2 is provided. [Selection diagram] Fig. 1

Description

The present invention relates to a bed mattress having a body pressure distribution performance, and more particularly to a mattress for independence support that enables a user such as a person requiring long-term care to turn over, get up and get out of bed in a stable manner.

In recent years, various bedsore prevention mattresses with enhanced body pressure distribution function have been developed in order to prevent the onset of bedsores in inpatients and long-term care recipients. However, in general, bedsore prevention mattresses have the entire mattress formed softly in order to obtain a desired body pressure distribution function, and the user's body tends to sink deeply. Therefore, when a mild care recipient who can get up and get out of bed by himself or with the assistance of a caregiver uses this kind of bed sore prevention mattress, the force is dispersed and it is difficult to balance, so he gets up. In some cases, it became difficult to sit on the edge of the bed, and the posture of sitting on the edge of the bed (the sitting position on the edge) became unstable.

Therefore, Patent Document 1 describes a mattress that has excellent body pressure dispersion performance, is easy to get up on the mattress, and has a good sense of stability in the sitting position. This mattress is formed by laminating a surface layer, an intermediate layer, and a back surface layer made of a foamed mat material. Of these, the intermediate layer has a hard member arranged on the peripheral edge in the short side direction of the mattress, and a hard member is arranged in the central portion. It has a structure in which soft members are arranged, and the hardness of each layer has a hardness relationship of hard member> back surface layer> front surface layer and / or soft member, and the contact surface between the hard member and the soft member faces the center of the back surface layer. The angle of inclination is 25 to 50 degrees.

Jitsufuku No. 4-53369

In the mattress of Patent Document 1 described above, since a hard member is arranged on the peripheral edge of the mattress, when the user tries to get up with his / her hand or elbow on the peripheral edge, it is easy to balance and the rising operation is stable. .. Then, by providing an inclined structure at a predetermined angle on the contact surface between the mattress peripheral portion formed of the hard member and the soft member in the center of the mattress, the difference in hardness (hardness gap) between the contact portion between the hard member and the soft member. And the stability of the sitting position is also improved. However, for example, if the thickness of both members constituting the intermediate layer is reduced, the inclined structure portion becomes smaller, so that the hardness gap may not be sufficiently eliminated. Further, if the user sits deeply in the end sitting position, the user's buttocks may get over the inclined structure portion, and in such a case, if the center of gravity is moved backward, the end sitting stability may be disturbed due to the hardness gap. Therefore, there has been a demand for end-sitting stability by further eliminating the hardness gap.

On the other hand, in order to get up and get out of bed on the mattress, it is necessary to first change the posture from lying on the mattress (supine position) to lying sideways (side-lying position), that is, turning over. .. In the above-mentioned Patent Document 1, although the structure of the mattress with improved ease of getting up on the mattress is described, the structure of the mattress that is easy to turn over has not been studied.

Therefore, the present invention has been made in view of the above points, and the purpose of the present invention is to create a hardness gap, which is the difference in hardness between the mattress peripheral portion and the flexible mattress central portion, while providing rigidity to the mattress peripheral portion. The purpose is to provide a mattress having a structure that further eliminates the problem and enhances the stability of sitting on the edge and the stability of getting up, and also enhances the ease of turning over.

As a result of diligent studies to solve the above problems, the present inventors have found the following. When turning over from the supine position to the lateral decubitus position, the movements of head rotation → trunk rotation → pelvis rotation are performed. Of these, in the turning of the trunk, the turning motion of the shoulder is an important point for successfully turning over, and the turning motion of the shoulder is not hindered and it is easy to turn over by making it easy to turn. .. Therefore, it was found that by selectively submerging the shoulders and upper arms in the turning direction into the mattress, the shoulders that have entered the mattress serve as the axis of rotation for turning over and the turning over is promoted. Based on this knowledge, the present invention was completed.

In order to solve the above problems, the mattress of the present invention is arranged in the central portion in the width direction of the mattress, and has a central block supporting at least the back and waist (including the shoulder and sacral region) of the user in the supine position, and the width of the mattress. A mattress that includes a mattress unit that is located at both ends of the orientation and supports at least the shoulders of a supine user, with the central block being more than the outer peripheral edge of the end block. It is flexibly formed, and the end block is adjusted so that a hardness gradient is formed in which the apparent hardness gradually decreases toward the direction of contact with the central block, and the shoulder of the user in the supine position. A hardness adjusting means for adjusting the apparent hardness of the position in contact with the center block so as to be lower than the apparent hardness of the central block is provided.

By providing the above-mentioned hardness adjusting means on the end block, the apparent hardness of the end block gradually decreases in the direction of contact with the central block, so that the outer side of the flexible central block and the hard end block The hardness gap, which is the difference in hardness from the peripheral edge, is eliminated. In addition, the hardness adjusting means is adjusted so that the apparent hardness of the position where the end block is in contact with the shoulder of the user in the supine position is lower than the apparent hardness of the flexible central block. The user's shoulders and upper arms in the area are likely to selectively sink into the low hardness part of the end block, and the shoulders that sink into that part serve as the axis of rotation for turning over and promote turning over. .. In addition, in this specification, a "block" of a central block and an end block means a section (area) in a mattress unit.

Further, the hardness adjusting means of the present invention is a plurality of concave grooves formed on the upper surface or the lower surface of the end block, and the plurality of concave grooves are arranged in the longitudinal direction of the mattress and are arranged in the longitudinal direction of the mattress toward the direction in contact with the central block. Each groove has an array region formed so that the void volume gradually increases, and at least the void volume among the plurality of recesses is the largest in the portion corresponding to the position in contact with the shoulder of the user in the supine posture. It is also preferable that a large groove is arranged. By forming a plurality of concave grooves in the end block so that the void volume of each concave groove gradually increases, a hardness gradient is formed in which the apparent hardness of the end block gradually decreases, and a flexible central block and hard are formed. The hardness gap, which is the difference in hardness from the outer peripheral edge of the end block, is eliminated. In addition, by making the void volume of the concave groove formed in the portion corresponding to the position of the end block in the supine position in contact with the shoulder of the user larger than that of the other portions, the appearance of the portion in contact with the shoulder of the user Since the hardness of the body is smaller than that of the other parts and the central block, the shoulders and upper arms of the user who are in the direction of turning over are likely to selectively sink into the end block, and the shoulders that have entered the end block are turned over. It becomes the axis of rotation and the turning over is promoted.

Further, it is also preferable that the above-mentioned increase in the void volume of the concave groove is performed by increasing the groove depth, increasing the groove width, or a combination thereof. Thereby, a suitable means for increasing the void volume of the concave groove is selected.

Further, the hardness adjusting means of the present invention is a plurality of concave grooves formed on the upper surface or the lower surface of the end block, and the plurality of concave grooves are arranged in the longitudinal direction of the mattress and are arranged in the longitudinal direction of the mattress toward the direction in contact with the central block. The adjacent concave groove and the concave groove have an arrangement region formed so that the distance between the adjacent concave groove and the concave groove is gradually narrowed, and the adjacent concave groove and the concave groove in the portion corresponding to the position in contact with the shoulder of the user in the supine posture. It is also preferable that the recesses are arranged so that the average value of the intervals between the two is smaller than the average value in other portions. By arranging a plurality of concave grooves in the end block so that the distance between the concave grooves is gradually narrowed, a hardness gradient is formed in which the apparent hardness of the end block is gradually reduced, and a flexible central block and a hard one are formed. The hardness gap, which is the difference in hardness from the outer peripheral edge of the end block, is eliminated. In addition, by making the distance between the position of the end block in the supine position in contact with the shoulder of the user and the groove of the corresponding portion smaller than the distance of the other parts, the apparent portion in contact with the shoulder of the user can be seen. Since the hardness is smaller than that of other parts and the central block, the user's shoulders and upper arms in the turning direction are more likely to selectively sink into the end block, and the shoulders that have entered the end block are turned over. It becomes a rotation axis and rolls over is promoted. The concave groove also includes a form in which the groove width is extremely small (for example, a cut by half-cut processing).

Further, the hardness adjusting means of the present invention is a plurality of through holes formed in the thickness direction of the end block, and the arrangement of the plurality of through holes is such that the void volume of the through holes is arranged in the direction in contact with the central block. Alternatively, at least one of the plurality of through holes has a region formed so as to gradually change, and the portion corresponding to the position in contact with the shoulder of the user in the supine posture has the largest void volume among the plurality of through holes. It is also preferable that the holes are arranged or that the through holes are arranged so that the average value of the intervals between the adjacent through holes and the through holes is smaller than the average value in other portions. In the end block, the through holes are arranged so that the diameter of the through holes gradually increases toward the direction in contact with the central block, or the through holes are arranged so that the number of through holes gradually increases, or these By combining, a hardness gradient is formed in which the apparent hardness of the end block gradually decreases, and the hardness gap, which is the difference in hardness between the flexible central block and the outer peripheral edge of the hard end block, is eliminated. .. In addition, a through hole having the largest clearance volume is arranged at a portion corresponding to the position of the end block in the supine position in contact with the shoulder of the user, or the interval between adjacent through holes is made smaller than the interval between other portions. Or, by combining these, the apparent hardness of the part in contact with the user's shoulder is smaller than that of the other parts and the central block, so that the user's shoulder and upper arm in the turning direction are the end block. The shoulders that have entered the end block serve as the axis of rotation for turning over, and the turning over is promoted. The through hole also includes a notch form that penetrates the end block in the thickness direction.

Further, it is also preferable that the central block of the mattress unit of the present invention is formed of a first cushion material, and the end block is formed of a second cushion material that is harder than the first cushion material. This makes it possible to select a material having physical properties and specifications such as hardness suitable for each block constituting the mattress unit.

Further, the hardness of the second cushion material (based on JIS K6401 "soft polyurethane foam for load bearing") forming the end block of the present invention is 180 to 440 N, and the second cushion material with respect to the hardness of the first cushion material. It is also preferable that the hardness ratio (ratio of hardness measured in accordance with JIS K6401 “Soft Polyurethane Foam for Load Capacity”) is 1.8 to 6.5. Thereby, a suitable hardness range of the first cushion material and the second cushion material is selected.

Further, the first cushion material and the second cushion material of the present invention may be one or more materials selected from the group consisting of a resin foam, a three-dimensional network structure and a cotton molded product, respectively. preferable. As a result, suitable materials constituting the first cushion material and the second cushion material are selected. These materials are excellent in moldability and lightweight, and the hardness adjusting means described above can be stably formed.

Further, the central block and the end block of the mattress unit of the present invention are formed of the same cushioning material, and the apparent hardness of the central block is lower than the apparent hardness of the outer peripheral edge of the end block. It is also preferable that a second hardness adjusting means for adjusting the hardness is provided. As a result, the mattress unit can be formed of one type of cushioning material.

Further, it is also preferable that the second hardness adjusting means provided in the central block is a plurality of slits, through holes, or grooves formed on the upper surface or the lower surface of the central block. Thereby, the mode of the suitable hardness adjusting means is selected.

Further, when the central block and the end block of the mattress unit are formed of the same cushion material, the cushion material is preferably a resin foam, a three-dimensional network structure, or a cotton molded body. Thereby, a suitable material constituting the mattress unit is selected. These materials are excellent in moldability and lightweight, and the hardness adjusting means described above can be stably formed.

Further, the mattress unit of the present invention is laminated on a lower layer formed of a cushion material, and a plurality of lower layer grooves arranged in the width direction of the mattress are provided on the upper surface or the lower surface of the lower layer. Is also preferable. As a result, the user's body is stably supported by the lower layer formed of the cushion material, and the plurality of lower layer grooves provided in the lower layer facilitate deformation following gudge-up such as back raising or knee raising. Can be.

Further, it is also preferable that a lower layer groove is provided on the upper surface of the lower layer described above, and a concave groove is provided on the lower surface of the end block of the mattress unit. By providing the lower layer groove and the concave groove facing each other in this way, the facing portion where the lower layer groove and the concave groove face each other is easily deformed selectively inside the mattress, so that the action and effect of the mattress unit can be partially affected. Can be further improved.

Further, the cushion material forming the lower layer is preferably one or more materials selected from the group consisting of a resin foam, a three-dimensional network structure and a cotton molded body. As a result, a suitable material constituting the cushioning material of the lower layer is selected.

According to the present invention, it is possible to provide a mattress having the following excellent effects.
(1) The hardness adjusting means of the present invention sufficiently eliminates the hardness gap, which is the difference in hardness between the peripheral portion of the hard mattress and the central portion of the flexible mattress, so that the end sitting stability and the rising stability are high. , A user such as a person requiring mild care can get up and get out of bed independently.
(2) Since the shoulder and upper arm of the user selectively sink into the portion of the mattress adjusted to low hardness, the shoulder that has entered the mattress serves as a rotation axis for turning over, and turning over is promoted.
(3) Since the hardness adjusting means is obtained by providing a plurality of concave grooves in the end block, the mattress can have a simple structure and can be easily manufactured.

It is (a) an exploded perspective view, (b) a side view in a width direction, and (c) a side view in a longitudinal direction of the mattress which concerns on 1st Embodiment. It is a figure which shows (a) the upper surface side and (b) the figure which shows the lower surface side of the mattress unit located in the middle layer of the mattress which concerns on 1st Embodiment. It is a figure which shows the range of the position in contact with the shoulder part of the user of the supine posture in the mattress unit. It is a side view in the width direction of the mattress which concerns on 1st Embodiment, and is a partially enlarged view thereof. It is a graph which shows the relationship between the position in the width direction of a mattress and the apparent hardness of a mattress unit. It is a side view in the longitudinal direction of the mattress which concerns on 1st Embodiment, and is a partially enlarged view thereof. It is a figure which shows the upper surface side of the lower layer of the mattress which concerns on 1st Embodiment. It is a figure explaining the method of measuring the apparent hardness of the mattress unit of this invention. It is an exploded perspective view which shows the mattress which concerns on 2nd Embodiment. It is a side view in the width direction of the mattress which concerns on 2nd Embodiment, and is a partially enlarged view thereof. It is a figure which shows the arrangement of the through hole in (a) end block of the mattress unit which concerns on 3rd Embodiment, (b) the cross-sectional view taken along line AA of FIG. 11 (a), and the partially enlarged view thereof. It is a figure which shows the other arrangement example of the through hole provided in the end block of the mattress unit which concerns on 3rd Embodiment. It is (a) an exploded perspective view, (b) a side view in a width direction, and (c) a side view in a longitudinal direction of the mattress which concerns on 4th Embodiment. It is a figure which shows (a) the upper surface side and (b) the figure which shows the lower surface side of the mattress unit which concerns on 4th Embodiment.

As shown in FIG. 1, the mattress 1 according to the first embodiment of the present invention is configured by laminating a surface layer 8, a mattress unit 4 as an intermediate layer, and a lower layer 6. In addition, in this specification, the term "up and down" means the up and down direction in a state where the mattress 1 is installed on a bed or a floor and used, that is, the up and down direction in FIG.

First, the mattress unit 4 constituting the mattress 1 according to the present embodiment will be described. As shown in FIG. 2, the mattress unit 4 in the present embodiment is composed of a central block 2 arranged at the center in the width direction of the mattress and two end blocks 3 arranged on both sides thereof. .. In the present embodiment, as will be described later, the central block 2 and the end block 3 are formed of different cushioning materials. Therefore, the central block 2 and the end block 3 may be fixed to the lower layer 6 and the surface layer 8 with an adhesive or the like on the adjacent surfaces of the block 2 and the end block 3 so as not to be displaced from each other. Each may be fixed.

As shown in FIG. 3, the central block 2 of the mattress unit 4 is configured to support at least the back and waist (including the buttocks and the sacrum) of the body of the user B in the supine position. The central block 2 in the present embodiment has a size of 31 cm in the width direction, 191 cm in the length direction, and 3 cm in thickness, and is formed in a central portion of the body of the user B in the supine position, that is, Can support the head, back, hips and lower limbs. As will be described later, the length of the central block in the width direction is the position S in contact with the shoulder of the user in the supine position (the area between 11 cm and 25 cm from the center of the mattress in the width direction toward one end in the width direction). The length of the central block in the width direction is less than 50 cm, preferably 40 cm or less, and more preferably 32 cm or less, because the center block needs to be arranged on the end block 3. The central block 2 is formed more flexibly than the outer peripheral edge 3a of the end blocks arranged on both sides thereof, and in the present embodiment, the central block 2 is a second cushion forming the end block 3. It is made of a first cushioning material that is more flexible than the material. Therefore, the central block 2 has excellent body pressure dispersibility and can flexibly support the body of the user B in contact with the central block 2. As the first cushion material, the hardness measured in accordance with JIS K6401 "Flexible Polyurethane Foam for Load Capacity" is preferably 50 to 160 N, more preferably 70 to 150 N, and 90 to 140 N. Some are particularly preferred. The first cushioning material is not particularly limited as long as it has the above-mentioned hardness and cushioning property, but a resin foam, a three-dimensional network structure, and a cotton molded body are preferably used, and are handled and processed. A resin foam is more preferable from the viewpoint of ease of use. Specific examples of the resin foam include foamed polyurethane, foamed polyolefin, and foamed silicone. When the surface layer 8 having body pressure dispersibility is laminated on the central block 2, the center block 2 does not necessarily have to have the hardness having body pressure dispersibility, and the hardness outside the above range is set. It is also possible to use a cushioning material to have. Further, as the first cushion material, a fluid-filled structure such as an air cell in which air or liquid is filled in a bag made of synthetic resin or rubber material and sealed may be applied.

As shown in FIG. 3, the end block 3 of the mattress unit 4 is configured to support at least the shoulders of the body of the user B in the supine position. Each of the end blocks 3 in the present embodiment is formed separately from the central block 2, and has a size of 30 cm in the width direction, 191 cm in the longitudinal direction, and 3 cm in thickness. , The shoulders and arms of the body of the user B in the supine position can be supported. The end block 3 is formed of a second cushion material that is harder than the first cushion material that forms the adjacent central block 2. Therefore, the end block 3 has a large repulsive force against a load (pressing force) when the user touches or sits on the hand, so that the tension is effective and the balance is easily maintained, and the end block 3 has end sitting stability and rising stability.

As shown in FIGS. 1 to 5, the end block 3 in the present embodiment is provided with a hardness adjusting means 5 composed of four recessed grooves 5a to 5d. The hardness adjusting means 5 forms a hardness gradient in which the apparent hardness of the end block 3 gradually decreases toward the direction in contact with the central block 2, that is, toward the center in the width direction of the mattress. It has been adjusted to. Here, the "apparent hardness" in the present specification is not the hardness of the material itself of the cushion material forming the end block 3 and the central block 2, but the hardness measured in the form of the mattress unit 4, that is, the central block. The hardness of the end block 3 itself provided with the hardness adjusting means 5 and the hardness adjusting means 5 is measured, and the end block 3 and the center block 2 are pressed and deformed in a predetermined area in the thickness direction (downward direction). It refers to the hardness of the measured part, which is required as the repulsive force of time. Specifically, as shown in FIG. 8, the "apparent hardness" is such that a circular aluminum pressurizer IN having a diameter of 40 mm and a thickness of 1.6 mm is directly applied to the measurement portion on the upper surface of the central block 2 or the end block 3. When they are brought into contact with each other and pushed to a depth corresponding to 2/3 of the thickness of each block (for example, 20 mm when the thickness of the measurement portion is 30 mm) at a speed of 100 ± 20 mm / min and held for 10 seconds in that state. It is obtained by measuring the repulsive force of the force gauge FG. The measurement portion of each block shall be precompressed in accordance with the JIS K6401-A method.

As shown in FIGS. 2B and 4, the hardness adjusting means 5 in the present embodiment is four recessed grooves 5a to 5d formed by digging into the lower surface side of the end block 3. The plurality of concave grooves 5a to 5d are continuously arranged in the longitudinal direction of the mattress, and are formed so that the void volume of the concave grooves gradually increases in the direction in contact with the central block 2. The increase in the void volume of the concave grooves 5a to 5d in the present embodiment is performed by gradually increasing the groove depth from the concave groove 5a to the concave groove 5c, and the void volume from the concave groove 5c to the concave groove 5d is increased. Is done by increasing the groove width. The void volume of the concave groove may be increased so as to gradually increase, for example, by increasing the groove depth, expanding the groove width, changing the cross-sectional shape of the groove, or a combination thereof. It is performed and is not limited to the method described for this embodiment. Further, the number of concave grooves is appropriately determined depending on the hardness of the end block 3 and the cross-sectional shape of the concave grooves, and is not limited to the number of grooves shown in the present embodiment. The concave grooves 5a to 5d in the present embodiment are arranged with an interval of 2 cm, the concave groove 5a has a groove depth of 1 cm and a groove width of 2 cm, and the concave groove 5b has a groove depth of 1.5 cm and a groove width of 2 cm. The groove 5c is formed to have a groove depth of 2 cm and a groove width of 2 cm, and the concave groove 5d is formed to have a groove depth of 2 cm and a groove width of 3 cm. FIG. 5 is a graph showing the relationship between the position in the width direction of the mattress and the apparent hardness. According to this, the apparent hardness of the end block 3 is constant in the portion where the concave groove, which is the hardness adjusting means 5, is not formed, that is, the outer peripheral edge portion 3a of the end block, but the void volume is constant. The concave groove formed so as to gradually increase shows a hardness gradient in which the apparent hardness gradually decreases in the direction in contact with the central block 2. As a result, the hardness difference between the end block 3 made of a hard material and the central block 2 made of a soft material becomes gentle, so that the hardness gap is eliminated and the stability in the end sitting position is improved. The concave groove includes, for example, a cut by half-cut processing as a form in which the groove width is extremely small.

Further, as shown in FIGS. 3 to 5, by the hardness adjusting means 5, the apparent hardness of the end block 3 at the position S in contact with the shoulder of the user B in the supine position is the apparent hardness of the central block 2. It is adjusted to include the lower part. In the present embodiment, of the four concave grooves 5a to 5d of the hardness adjusting means 5, at least the concave groove 5d having the largest void volume is formed at the portion corresponding to the position S in contact with the shoulder portion of the user B in the supine position. It is arranged so that the apparent hardness at this portion is lower than the apparent hardness of the central block 2. In the graphs of FIGS. 5 (a) and 5 (b), the relationship between the position in the width direction of the mattress and the apparent hardness of the mattress unit is illustrated. FIG. 5A is a graph when the adjacent surfaces of the central block 2 and the end block 3 are fixed with the adhesive 9, and FIG. 5B is a graph showing the central block 2 and the end block 3. It is a graph when the adjacent surface of is not fixed. As shown in the graphs of FIGS. 5A and 5B, the apparent hardness of the mattress unit gradually decreases as the position in the width direction of the mattress moves from the end block 3 to the center block 2. , The lowest in the vicinity of the portion where the concave groove 5d having the largest void volume is arranged, but the apparent hardness at the position of the central block 2 is the end portion at the position S in contact with the shoulder portion of the user B in the supine posture. It is higher than the apparent hardness of block 3. Therefore, at the position S where the end block 3 is in contact with the shoulder of the user B in the supine position, a portion having an apparent hardness lower than that of the central block 2 (hereinafter, also referred to as a hardness pocket P) is generated. As a result, when the user rolls over, the user's shoulder and upper arm in the rolling direction are guided to the hardness pocket P of the end block 3, and the user's shoulder turns in the rolling direction. However, it sinks into the hardness pocket P. As a result, the shoulder portion sunk in the end block 3 becomes the rotation axis for turning over, and turning over is promoted. Further, as shown in the graph of FIG. 5B, the end portion of the central block 2 adjacent to the hardness pocket P is formed by not fixing the adjacent surface between the central block 2 and the end block 3 with an adhesive or the like. The apparent hardness of the central block 2 can be made smaller than the apparent hardness on the central portion side of the central block 2. As a result, in the initial stage of turning over, the difference in hardness between the central portion side and the end portion of the central block 2 acts to guide the shoulder portion of the user B in the supine position to the hardness pocket P, so that the turning over is smoother. Is promoted. If the apparent hardness of the two end portions of the central block can be made smaller than that of the central side, the apparent hardness of the two end portions of the central block may be adjusted by other means.

The minimum value of the apparent hardness in the hardness pocket P described above is the ratio to the value of the apparent hardness of the central portion of the central block 2 measured by the same method and conditions (minimum value of the apparent hardness in the hardness pocket P / central block 2). The value of the apparent hardness of the central portion of the above is preferably in the range of 0.1 to 0.9, more preferably in the range of 0.2 to 0.7, and 0.3 to 0.6. It is particularly preferable to set it in the range of. If this apparent hardness ratio is less than 0.1, the hardness gap may be locally too large and it may be difficult to move on the floor, and if it exceeds 0.9, the effect of improving the ease of turning over can be obtained. This is because it is difficult. Further, as shown in the graph of FIG. 5B, when the apparent hardness of the end portion of the central block 2 adjacent to the hardness pocket P is made smaller than the apparent hardness of the central portion side of the central block 2. , The ratio of the minimum apparent hardness in the hardness pocket P to the apparent hardness value near the two ends of the central block (minimum apparent hardness in the hardness pocket P / apparent hardness value at the two ends of the central block) Is preferably in the range of 0.6 to 0.9, and more preferably in the range of 0.7 to 0.85. By setting this range, the shoulder portion of the user is guided to the hardness pocket P in the initial stage of the turning motion, and the turning is promoted more smoothly.

As shown in FIG. 2B, in the present embodiment, each end block 3 is provided with recessed grooves 5a to 5d, that is, hardness adjusting means 5 continuously in the longitudinal direction of the mattress. Then, on the lower surface of the end block 3, the concave groove having the largest void volume among the plurality of concave grooves constituting the hardness adjusting means 5 is located at the portion corresponding to the position S in contact with the shoulder of the user in the supine posture. At least 5d is arranged. As shown in FIG. 3, the position S in contact with the shoulder of the user in the supine position is at least between 11 cm and 25 cm in the width direction of the mattress from the center in the width direction to one end in the width direction. In the length direction of the mattress, it is 20 cm or more from one end (head side end) in the length direction of the mattress toward the other end, and is other than the length direction of the mattress. It is more preferable that the area is 100 cm or more from one end (the end on the foot side) toward one end. The area related to the position S in contact with the shoulder of the user in the supine position is the size in the research on the elucidation of the characteristics of the elderly for the design of equipment for the elderly by HQL (General Incorporated Association Human Life Engineering Research Center). It was obtained based on the morphological database (URL: http://www.hql.jp/project/funcdb2000/). For example, the numerical value "11 cm" from the center of the mattress in the width direction toward one end in the width direction is one of the measurement data (2001) of the anterior axillary width (straight line distance between the left and right anterior axillary points) in the above database. , Based on the value obtained by dividing the minimum value (216 mm) of the class whose frequency exceeds 1 in the frequency distribution table by 2. Similarly, "25 cm" from the center of the mattress in the width direction toward one end in the width direction is the measurement data (Heisei) of the shoulder width (straight line distance connecting the outermost protruding points of the deltoid muscles of the left and right upper arms) in the same database. It is based on the value obtained by dividing the maximum value (483 mm) of the class whose frequency exceeds 1 in the frequency distribution table by 2 in (2013). In addition, "20 cm" from one end (head side end) to the other end of the mattress in the length direction is the total head height (distance perpendicular to the ear and eye plane from the crown to the otogai point) in the same database. It is based on the minimum value (196 mm) of the class in which the frequency of the frequency distribution table exceeds 1 in the measurement data (2001). In addition, "100 cm" from the other end (the end on the foot side) in the length direction of the mattress is the measurement data (2001) of the acromion height (vertical distance from the floor to the acromion point) in the same database. Of these, it is based on the minimum value (1060 mm) of the class in which the frequency of the frequency distribution table exceeds 1. In the present embodiment, a plurality of concave grooves 5a to 5d constituting the hardness adjusting means 5 are continuously provided in the longitudinal direction of the mattress, and the concave groove 5d having the largest void volume is also continuous in the longitudinal direction of the mattress. However, the concave groove 5d having the largest void volume is provided only in the region S in the longitudinal direction of the mattress, which is in contact with the shoulder portion of the user in the supine position of the end block 3 shown in FIG. In that case, in the region other than the above-mentioned position S of the end block 3, instead of the concave groove 5d, the end block 3 has a void volume such that the apparent hardness is about the same as the hardness of the central block. It is preferable that the groove is provided. When the body size of the user B is smaller than the statistical value of an adult such as a child, the position S may be set according to the body size of the user B based on the above design method.

The position of the hardness adjusting means 5 on the end block 3 is at least 10 cm or more away from the widthwise end of the mattress from the viewpoint of improving the end sitting stability and the stability when standing up at the outer peripheral edge 3a of the end block. It is preferable that the distance is 13 cm or more. The hardness adjusting means 5 may be formed not separated from the widthwise end of the mattress of the end block 3 by 10 cm, or may be formed over the entire width direction of the mattress of the end block 3. From the viewpoint of enhancing the stability of the end sitting position and the stability when standing up, the apparent hardness of the outer peripheral edge portion 3a of the end block 3 is set to at least about 10 cm from the widthwise edge of the mattress in the center of the central block 2. It is preferable to adjust the hardness to 1.5 times or more, preferably 1.5 to 4 times, and more preferably 2 to 3 times the apparent hardness of the portion.

Further, as shown in FIGS. 1 to 4, the recessed grooves 5a to 5d of the present embodiment are provided on the lower surface side of the end block 3, but the present invention is not limited to this, and the groove 5a to 5d of the present embodiment is not limited to this. It may be provided in. Further, the concave grooves 5a to 5d are provided not only on the upper surface or the lower surface of the end block 3, but also on the upper surface of the end block 3, for example, the concave grooves 5d and 5b are provided on the upper surface and 5c and 5a are provided on the lower surface. The lower surfaces may be provided in combination. Further, the cross-sectional shapes of the concave grooves 5a to 5d in the present embodiment are semicircular or semi-circular, but in addition to these shapes, horseshoe-shaped, circular, polygonal, or any other shape or a combination thereof. May be good.

As the second cushion material forming the end block 3, the hardness measured in accordance with JIS K6401 "Soft polyurethane foam for load bearing" is preferably 180 to 440 N, preferably 200 to 300 N. More preferably, it is particularly preferably 210 to 250 N. The second cushioning material is not particularly limited as long as it has the above-mentioned hardness and cushioning property, but a resin foam, a three-dimensional network structure, and a cotton molded body are preferably used, and can be handled and processed. From the viewpoint of ease of use, a resin foam is more preferable. Specific examples of the resin foam include foamed polyurethane, foamed polyolefin, and foamed silicone. Further, the hardness ratio of the second cushion material constituting the end block 3 to the hardness of the first cushion material constituting the central block 2 (at the hardness measured in accordance with JIS K6401 "Soft polyurethane foam for load bearing"). The ratio) is preferably 1.5 to 6.5, more preferably 1.7 to 4.0, and particularly preferably 1.8 to 3.0.

Next, the lower layer 6 will be described. The lower layer 6 of the mattress 1 is formed of a third cushioning material that is relatively hard and can stably support the user's body. The lower layer 6 in the present embodiment is formed to have a length of 91 cm in the width direction, a length of 191 cm in the longitudinal direction, and a thickness of 3 cm. As the third cushion material, the hardness measured in accordance with JIS K6401 "Flexible Polyurethane Foam for Load Capacity" is preferably 180 to 440 N, more preferably 200 to 300 N, and 210 to 250 N. Some are particularly preferred. The third cushioning material is not particularly limited as long as it has the above-mentioned hardness and cushioning property, but a resin foam, a three-dimensional network structure, and a cotton molded body are preferably used, and are handled and processed. A resin foam is more preferable from the viewpoint of ease of use. Specific examples of the resin foam include foamed polyurethane, foamed polyolefin, and foamed silicone.

As shown in FIGS. 1, 6 and 7, the lower layer 6 in the present embodiment is provided with a plurality of lower layer grooves 7 continuously in the width direction of the mattress. The lower groove 7 facilitates the deformation of the mattress when the back of the mattress 1 is raised, and imparts flexibility that easily follows the movement of the back raising. In the present embodiment, five lower layer grooves 7 are arranged in parallel on the upper surface side of the lower layer 6 at positions separated from the center in the longitudinal direction of the mattress by 20 cm at both ends with an interval of 8 cm. Reference numeral 7 denotes a U-shaped groove having a groove width of 1 cm and a groove depth of 2 cm. Further, FIG. 7 shows the positional relationship between the lower groove 7 (solid line) of the lower layer 6 and the concave groove (dotted line) of the hardness adjusting means 5 provided in the mattress unit 4, and the lower layer 6 shows the lower groove 7. By providing the above, the hardness of the region where the lower groove 7 and the concave groove of the hardness adjusting means 5 intersect is adjusted to be small, so that this region is provided with flexibility and the ease of turning over is improved. As shown in FIG. 7, the lower layer groove 7 in the present embodiment is not provided near the center of the mattress in the longitudinal direction, but as long as it does not interfere with the function of the hardness adjusting means 5 of the end block 3. The lower groove 7 may be formed over the entire longitudinal direction of the mattress. The cross-sectional shape of the lower groove 7 in the present embodiment is U-shaped, but it may be semicircular, semi-circular, horseshoe-shaped, circular, polygonal, or any other shape or a combination thereof.

As shown in FIGS. 1, 6 and 7, the lower layer groove 7 in the present embodiment is provided on the upper surface side of the lower layer 6, but is not limited to this, and is provided on the lower surface side of the lower layer 6. May be good. Further, in the mattress 1 according to the present embodiment, the opening of the lower layer groove 7 provided on the upper surface of the lower layer 6 and the opening of the concave groove of the hardness adjusting means 5 provided on the lower surface of the end block 3 face each other. As a result, the facing portion where the lower layer groove and the concave groove face each other is easily deformed selectively inside the mattress, so that the effect of the mattress unit can be partially improved.

Next, the surface layer 8 will be described. As shown in FIG. 1, the surface layer 8 is a layer that covers the upper surface of the mattress unit 4 described above, and is formed of a flexible fourth cushioning material. The surface layer 8 in the present embodiment is formed to have a length of 91 cm in the width direction, a length of 191 cm in the longitudinal direction, and a thickness of 2 cm. As the fourth cushion material, the hardness measured in accordance with JIS K6401 "Flexible Polyurethane Foam for Load Capacity" is preferably 50 to 160 N, more preferably 70 to 150 N, and 90 to 140 N. Some are particularly preferred. The fourth cushioning material is not particularly limited as long as it has the above-mentioned hardness and cushioning property, but a resin foam, a three-dimensional network structure, and a cotton molded body are preferably used, and can be handled and processed. From the viewpoint of ease of use, a resin foam is more preferable. Specific examples of the resin foam include foamed polyurethane, foamed polyolefin, and foamed silicone.

The mattress 1 in the present embodiment is configured by laminating a surface layer 8, an intermediate layer mattress unit 4, and a lower layer 6, but the mattress unit 4 alone or the mattress unit 4 and the surface layer Even if it is a combination of 8 or the lower layer 6, it is possible to obtain a mattress having the effects of the present invention, excellent in sitting position stability, and easy to turn over.

Next, the mattress 10 according to the second embodiment will be described. As shown in FIG. 9, the mattress 10 according to the present embodiment is configured by laminating a surface layer 8, an intermediate layer mattress unit 40, and a lower layer 60. The mattress unit 40 according to the present embodiment is composed of a central block 20 arranged at the center in the width direction of the mattress and two end blocks 30 arranged on both sides thereof. Since the central block 20 and the end block 30 are formed of different cushioning materials as in the first embodiment, they are fixed with an adhesive or the like on the adjacent surfaces of the two so as not to be displaced from each other. Alternatively, it may be fixed to the lower layer 60 and the surface layer 8 with an adhesive or the like.

As shown in FIGS. 9 and 10, the end block 30 in the present embodiment is provided with a hardness adjusting means 50 composed of five recessed grooves 50a to 50e. The hardness adjusting means 50 adjusts the end block 30 so as to form a hardness gradient in which the apparent hardness gradually decreases toward the direction in contact with the central block 20. As shown in FIG. 10, the hardness adjusting means 50 in the present embodiment is five recessed grooves 50a to 50e formed by digging into the lower surface side of the end block 30. The plurality of recessed grooves 50a to 50e are continuously arranged in the longitudinal direction of the mattress, and are formed so that the distance D between the adjacent recessed grooves gradually narrows toward the direction in contact with the central block 20. The average value of the distance D between the adjacent concave groove and the concave groove in the portion corresponding to the position S in contact with the shoulder of the user in the supine posture of the end block 30 having the arranged arrangement region is the other portion. The concave groove is arranged so as to be smaller than the average value in. In the present embodiment, as shown in FIG. 10, the concave grooves 50a to 50e are arranged in the order of 50a, 50b, 50c, 50d, 50e in the direction of contact with the central block 20, but are gradually adjacent to each other. It is arranged so that the distance D from the concave groove is narrowed. The number of concave grooves provided is appropriately determined depending on the hardness of the end block 30 and the cross-sectional shape of the formed concave grooves, and is not limited to the number of grooves shown in the present embodiment. By providing the concave groove so that the distance D from the adjacent concave groove is gradually narrowed in this way, the apparent hardness of the end block 30 is the portion where the concave groove, which is the hardness adjusting means 50, is not formed. That is, although it is constant at the outer peripheral edge portion 30a of the end block, the portion where the hardness adjusting means 50 is formed shows a hardness gradient in which the apparent hardness gradually decreases in the direction in contact with the central block. As a result, the hardness difference between the end block 30 made of a hard material and the central block 20 made of a flexible material becomes gentle, so that the hardness gap is eliminated and the stability in the end sitting position is improved. The concave groove may have a form in which the groove width is extremely small (for example, a cut by half-cut processing).

Further, the hardness adjusting means 50 is adjusted so that the apparent hardness of the end block 30 at the position S in contact with the shoulder of the user in the supine position is lower than the hardness of the central block 20. In the present embodiment, the average value of the distance D between the position S in contact with the shoulder of the user in the supine posture and the adjacent concave groove in the corresponding portion is smaller than the average value of the distance D in the other parts. It is realized by arranging a concave groove in. The apparent hardness of the end block 30 gradually decreases as the position in the width direction of the mattress moves from the end block 30 to the center block 20, and the distance D between the adjacent concave grooves D is the narrowest. The apparent hardness at the position of the central block 20 is the hardness of the end block 30 at the position S in contact with the shoulder of the user in the supine position, although it is the lowest in the vicinity of the formed portion (recessed groove 50d to 50e). It will be higher than the apparent hardness. Therefore, at the position S in contact with the shoulder portion of the user in the supine posture, a hardness pocket P having an apparent hardness lower than that of other portions is generated. As a result, when the user rolls over, the shoulder and upper arm of the user in the rolling direction are guided to the hardness pocket P of the end block 30, and the apparent hardness is higher than the hardness of the central block 20. The user's shoulder sinks into the low-adjusted part while turning in the turning direction. As a result, the shoulder portion sunk in the end block 30 serves as a rotation axis for turning over, and turning over is promoted.

The other description of the end block 30 and the hardness adjusting means 50 and the description of the center block 20 in the present embodiment are the same as in the case of the first embodiment described above, and the effects thereof are also the same.

Next, the lower layer 60 will be described. The lower layer 60 of the mattress 10 is formed of a third cushioning material that is relatively hard and can stably support the user's body. The lower layer 6 in the present embodiment is formed to have a length of 91 cm in the width direction, a length of 191 cm in the longitudinal direction, and a thickness of 3 cm. Although the lower layer 60 in the present embodiment is not provided with the lower layer groove, the lower layer groove 7 may be appropriately provided as shown in the first embodiment.

The other description of the lower layer 60 and the description of the surface layer 8 in the present embodiment are the same as in the case of the first embodiment described above, and the effects thereof are also the same.

Next, the mattress unit 41 of the mattress according to the third embodiment will be described. As shown in FIG. 11, the mattress unit 41 according to the present embodiment is composed of a central block 21 arranged at the center in the width direction of the mattress and two end blocks 31 arranged on both sides thereof. There is. As shown in FIG. 11B, the end block 31 in the present embodiment is provided with a hardness adjusting means 51 including a plurality of through holes penetrating the thickness direction of the end block 31. Then, as shown in FIG. 11A, the hardness adjusting means 51 composed of the plurality of through holes is formed so that the void volume of the through holes gradually increases in the direction of contact with the central block 21. .. Specifically, in the embodiment shown in FIG. 11, through holes 51a to 51d having four different sizes are arranged in the direction of contact with the central block 21, but the hole diameters of the through holes are the same as those of the central block 21. It is arranged so that it gradually increases in the direction of contact. The hardness adjusting means 51 formed in this way adjusts the end block 31 so as to form a hardness gradient in which the apparent hardness gradually decreases toward the direction in contact with the central block 21. The apparent hardness of the end block 31 is constant at the outer peripheral edge 31a of the end block where the through hole is not formed, which is the hardness adjusting means 51, but is central at the portion where the hardness adjusting means 51 is formed. It shows a hardness gradient in which the apparent hardness gradually decreases toward the direction of contact with the block 21. Therefore, since the hardness difference between the end block 31 and the flexible central block 21 becomes gentle, the hardness gap is eliminated and the stability in the end sitting position is improved. Further, as shown in FIG. 11, in the hardness adjusting means 51 in the present embodiment, the void volume among the plurality of through holes 51a to 51d is the largest in the portion corresponding to the position S in contact with the shoulder portion of the user in the supine posture. A large through hole 51d is arranged, and the apparent hardness in this portion is adjusted to be lower than the apparent hardness of the central block 21. From these facts, by the hardness adjusting means 51, the apparent hardness of the mattress unit 41 gradually decreases as the position in the mattress width direction moves from the end block 31 toward the central block 21, and the void volume is the largest. A hardness pocket P is formed, which is the lowest in the vicinity of the portion where the through hole 51d is arranged and has an apparent hardness lower than that of the central block 21 at the position S where the end block 31 is in contact with the shoulder of the user B in the supine position. Has been done. As a result, when the user rolls over, the shoulder and upper arm of the user in the rolling direction are guided to the hardness pocket P of the end block 31, and the shoulder of the user turns in the rolling direction. However, it sinks into the hardness pocket P, and as a result, the shoulder portion that sinks into the end block 31 becomes the axis of rotation for turning over, and turning over is promoted.

The through hole, which is the hardness adjusting means 51 in the present embodiment, forms a hardness gradient in which the apparent hardness of the end block 31 gradually decreases, and is in contact with the shoulder of the user B in the supine position of the end block 31. At the position S, the shape and number of the through holes may be selected and arranged so as to form a hardness pocket P having an apparent hardness lower than that of the central block 21, and the shape and number of through holes and their arrangement are as follows. The arrangement and type shown in the embodiment are not limited. As an example, although not particularly limited, as shown in FIG. 12A, the number of through holes 51'formed in substantially the same shape gradually increases in the direction of contact with the central block 21. The arrangement is such that the average value of the distance between the adjacent through-holes is smaller than the average value in the other parts at the position S where the end block 31 is in the supine position and in contact with the shoulder of the user B. Arrangement is such that, as shown in FIG. 12 (b), the rectangular through hole 51 "with an elongated cross section gradually increases its void volume toward the direction in contact with the central block 21. Various shapes and arrangements of the through holes can be mentioned, such as arranging the through holes having the largest void volume at the position S of the end block 31 in the supine position in contact with the shoulder portion of the user B. In addition, it is also possible to provide the concave groove formed in the above-described embodiment and combine it with the through hole to form the hardness adjusting means 51.

Other explanations regarding the end block 31 and the hardness adjusting means 51 in the present embodiment, the central block 21, the mattress unit 41, and the surface layer and the lower layer (not shown) are described in the first embodiment described above. It is the same as the case, and its action and effect are also the same.

As shown in FIG. 13, the mattress 12 according to the fourth embodiment of the present invention is configured by laminating a surface layer 8, a mattress unit 42 as an intermediate layer, and a lower layer 6. The mattress unit 42 constituting the mattress 12 according to the present embodiment is composed of a central block 22 arranged at the center in the width direction of the mattress and two end blocks 32 arranged on both sides thereof. In the present embodiment, unlike the first to third embodiments described above, the central block 22 and the end block 32 are formed of the same cushion material, and the mattress unit 42 is integrally formed as a whole. There is. The boundary between the central block 22 and the end block 32 in this embodiment is based on the relationship between the position in the width direction of the mattress described with reference to FIG. 5A or FIG. 5B and the apparent hardness of the mattress unit. Set. It is also possible to form the center block 22 and the end block 32 as separate bodies with the same cushion material to form a mattress unit.

The central block 22 of the mattress unit 42 is configured to support at least the back and waist (including the buttocks and the sacrum) of the body of the user B in the supine position. The central block 22 is formed more flexibly than the outer peripheral edge 32a of the end block 32 in order to softly receive these parts of the user's body. Specifically, in the present embodiment, the central block 22 is provided with a second hardness adjusting means 220 for adjusting the apparent hardness to be low. As shown in FIG. 14, the second hardness adjusting means 220 is arranged by a plurality of half-cut processes, which are arranged at predetermined intervals on the entire upper surface of the central block 22 in the width direction and continuously arranged in the longitudinal direction of the mattress. The notch (slit) 220a. As a result, the apparent hardness of the central block 22 is adjusted to be low, and an area more flexible and excellent in body pressure dispersibility than the outer peripheral edge portion 32 of the end block 32 is formed in the mattress unit 42. The second hardness adjusting means 220 is not limited to the shape and arrangement method of the slit 220a and the like shown in the present embodiment, and may be a groove, a through hole, or a combination thereof. Further, the hardness adjusting means 220 may be provided on the upper surface of the central block 22, may be provided on the lower surface, or may be provided in combination with the upper surface and the lower surface.

As the cushion material forming the mattress unit 42, that is, the central block 22 and the end block 32 in the present embodiment, the hardness measured in accordance with JIS K6401 "Flexible polyurethane foam for load bearing" is 180 to 440 N. Those having a concentration of 200 to 300 N are more preferable, and those having a temperature of 210 to 250 N are particularly preferable. This hardness is a high value for use as a member for supporting the back and waist (including the buttocks and the sacrum) (hard as physical properties), but the second hardness adjusting means 220 as described above is provided in the central block 22. As a result, the apparent hardness is lowered, and the central block 22 having flexibility and comfortable sleeping can be obtained. The apparent hardness ratio of the outer peripheral edge 32a of the end block 32 to the apparent hardness of the central block 22 is preferably 1.5 to 6.5, and more preferably 1.7 to 4.0. It is preferable, and it is particularly preferable that it is adjusted to be 1.8 to 3.0. The cushioning material is not particularly limited as long as it has the above-mentioned hardness and cushioning property, but a resin foam, a three-dimensional network structure, and a cotton molded body are preferably used, and are handled and processed. From the viewpoint of ease, the resin foam is more preferable. Specific examples of the resin foam include foamed polyurethane, foamed polyolefin, and foamed silicone.

Other explanations regarding the central block 22 in the present embodiment, the end block 32, the hardness adjusting means 5, the mattress unit 42, the surface layer 8 and the lower layer 6 provided on the end block 32 will be described above. It is the same as the case of the first embodiment, and the action and effect thereof are also the same.

The present invention is not limited to the above-described embodiment, and various design-modified forms within the range not deviating from the gist of the invention described in the scope of claims for utility model registration are also included in the technical scope.

1, 10, 12 Mattresses 2, 20, 21, 22 Central block 220 Second hardness adjusting means 220a Slits 3, 30, 31, 32 End blocks 3a, 30a, 31a, 32a Outer peripheral edges of end blocks 4 , 40, 41, 42 Mattress unit 5, 50, 51 Hardness adjusting means 5a, 5b, 5c, 5d, 50a, 50b, 50c, 50d, 50e Slit groove 51a, 51b, 51c, 51d, 51', 51 "through hole (Hardness adjusting means)
6, 60 Lower layer 7 Lower layer groove 8 Surface layer 9 Fixing means (adhesive)
B Supine user S Position in contact with the shoulder of the supine user P Hardness pocket D Distance between adjacent recesses IN Pressurizer FG force gauge (load measuring instrument)

Claims (12)

With a central block located in the center of the width of the mattress to support at least the back and waist of the supine user,
A mattress that includes a mattress unit that is located at both ends of the mattress in the width direction and consists of end blocks that support at least the shoulders of the supine user.
The central block is formed of a first cushion material, and the end block is formed of a second cushion material that is harder than the first cushion material.
The end block is adjusted so that a hardness gradient is formed in which the apparent hardness gradually decreases toward the direction of contact with the central block, and the apparent position of the end block in contact with the shoulder of the user in the supine position. A hardness adjusting means for adjusting the hardness of the central block so as to generate a hardness pocket lower than the apparent hardness of the central block is provided.
The apparent hardness of the central block is lower than the apparent hardness of the outer peripheral edge of the end block without the hardness adjusting means.
The hardness adjusting means is a plurality of concave grooves formed on the upper surface or the lower surface of the end block.
The plurality of grooves are arranged in the longitudinal direction of the mattress, and have an arrangement region formed so that the void volume of each groove gradually increases toward the direction in contact with the central block.
A mattress characterized in that at least a concave groove having the largest void volume among the plurality of concave grooves is arranged at a portion corresponding to a position in contact with the shoulder portion of the user in the supine posture. The mattress according to claim 1, wherein the increase in the void volume of the concave groove is performed by increasing the groove depth, increasing the groove width, or a combination thereof. With a central block located in the center of the width of the mattress to support at least the back and waist of the supine user,
A mattress that includes a mattress unit that is located at both ends of the mattress in the width direction and consists of end blocks that support at least the shoulders of the supine user.
The central block is formed of a first cushion material, and the end block is formed of a second cushion material that is harder than the first cushion material.
The end block is adjusted so that a hardness gradient is formed in which the apparent hardness gradually decreases toward the direction of contact with the central block, and the apparent position of the end block in contact with the shoulder of the user in the supine position. A hardness adjusting means for adjusting the hardness of the central block so as to generate a hardness pocket lower than the apparent hardness of the central block is provided.
The apparent hardness of the central block is lower than the apparent hardness of the outer peripheral edge of the end block not provided with the hardness adjusting means.
The hardness adjusting means is a plurality of concave grooves formed on the upper surface or the lower surface of the end block.
The plurality of recesses are arranged in the longitudinal direction of the mattress, and have an arrangement region formed so that the distance between the adjacent recesses gradually decreases toward the direction in contact with the central block.
The concave groove is arranged so that the average value of the distance between the adjacent concave groove and the concave groove in the portion corresponding to the position in contact with the shoulder of the user in the supine posture is smaller than the average value in the other portion. A mattress that is characterized by being With a central block located in the center of the width of the mattress to support at least the back and waist of the supine user,
A mattress that includes a mattress unit that is located at both ends of the mattress in the width direction and consists of end blocks that support at least the shoulders of the supine user.
The central block is formed of a first cushion material, and the end block is formed of a second cushion material that is harder than the first cushion material.
The end block is adjusted so that a hardness gradient is formed in which the apparent hardness gradually decreases toward the direction of contact with the central block, and the apparent position of the end block in contact with the shoulder of the user in the supine position. A hardness adjusting means for adjusting the hardness of the central block so as to generate a hardness pocket lower than the apparent hardness of the central block is provided.
The apparent hardness of the central block is lower than the apparent hardness of the outer peripheral edge of the end block not provided with the hardness adjusting means.
The hardness adjusting means is a plurality of through holes formed in the thickness direction of the end block.
The arrangement of the plurality of through holes has a region formed so that at least one of the void volume or the number of the through holes gradually increases toward the direction in contact with the central block.
At least the through hole having the largest void volume among the plurality of through holes is arranged at the portion corresponding to the position in contact with the shoulder of the user in the supine posture, or the distance between the adjacent through holes and the through holes. A mattress characterized in that through-holes are arranged so that the average value of is smaller than the average value in other parts. The hardness of the second cushion material forming the end block (based on JIS K6401 "soft polyurethane foam for load bearing") is 180 to 440 N, and the hardness of the second cushion material relative to the hardness of the first cushion material. The invention according to any one of claims 1 to 4, wherein the hardness ratio (ratio of hardness measured in accordance with JIS K6401 "Flexible Polyurethane Foam for Load Capacity") is 1.5 to 6.5. Mattress. The first cushion material and the second cushion material are each one or more materials selected from the group consisting of a resin foam, a three-dimensional network structure, and a cotton molded product. The mattress according to any one of claims 1 to 5. With a central block located in the center of the width of the mattress to support at least the back and waist of the supine user,
A mattress that includes a mattress unit that is located at both ends of the mattress in the width direction and consists of end blocks that support at least the shoulders of the supine user.
The central block and the end block are made of the same cushioning material.
The end block is adjusted so that a hardness gradient is formed in which the apparent hardness gradually decreases toward the direction of contact with the central block, and the apparent position of the end block in contact with the shoulder of the user in the supine position. A hardness adjusting means for adjusting the hardness of the central block so as to generate a hardness pocket lower than the apparent hardness of the central block is provided.
The central block is provided with a second hardness adjusting means for adjusting the apparent hardness to be lower than the apparent hardness of the outer peripheral edge portion of the end block not provided with the hardness adjusting means. ,
The hardness adjusting means is a plurality of concave grooves formed on the upper surface or the lower surface of the end block.
The plurality of grooves are arranged in the longitudinal direction of the mattress, and have an arrangement region formed so that the void volume of each groove gradually increases toward the direction in contact with the central block.
At least, the concave groove having the largest void volume among the plurality of concave grooves is arranged at a portion corresponding to the position in contact with the shoulder of the user in the supine posture.
A mattress characterized in that the second hardness adjusting means is a plurality of slits, through holes, or grooves formed on the upper surface or the lower surface of the central block. The mattress according to claim 7, wherein the increase in the void volume of the concave groove is performed by increasing the groove depth, increasing the groove width, or a combination thereof. With a central block located in the center of the width of the mattress to support at least the back and waist of the supine user,
A mattress that includes a mattress unit that is located at both ends of the mattress in the width direction and consists of end blocks that support at least the shoulders of the supine user.
The central block and the end block are made of the same cushioning material.
The end block is adjusted so that a hardness gradient is formed in which the apparent hardness gradually decreases toward the direction of contact with the central block, and the apparent position of the end block in contact with the shoulder of the user in the supine position. A hardness adjusting means for adjusting the hardness of the central block so as to generate a hardness pocket lower than the apparent hardness of the central block is provided.
The central block is provided with a second hardness adjusting means for adjusting the apparent hardness to be lower than the apparent hardness of the outer peripheral edge portion of the end block not provided with the hardness adjusting means. ,
The hardness adjusting means is a plurality of concave grooves formed on the upper surface or the lower surface of the end block.
The plurality of recesses are arranged in the longitudinal direction of the mattress, and have an arrangement region formed so that the distance between the adjacent recesses gradually decreases toward the direction in contact with the central block.
The concave groove is arranged so that the average value of the distance between the adjacent concave groove and the concave groove in the portion corresponding to the position in contact with the shoulder of the user in the supine posture is smaller than the average value in the other portion. ,
A mattress characterized in that the second hardness adjusting means is a plurality of slits, through holes, or grooves formed on the upper surface or the lower surface of the central block. With a central block located in the center of the width of the mattress to support at least the back and waist of the supine user,
A mattress that includes a mattress unit that is located at both ends of the mattress in the width direction and consists of end blocks that support at least the shoulders of the supine user.
The central block and the end block are made of the same cushioning material.
The end block is adjusted so that a hardness gradient is formed in which the apparent hardness gradually decreases toward the direction of contact with the central block, and the apparent position of the end block in contact with the shoulder of the user in the supine position. A hardness adjusting means for adjusting the hardness of the central block so as to generate a hardness pocket lower than the apparent hardness of the central block is provided.
The central block is provided with a second hardness adjusting means for adjusting the apparent hardness to be lower than the apparent hardness of the outer peripheral edge portion of the end block not provided with the hardness adjusting means. ,
The hardness adjusting means is a plurality of through holes formed in the thickness direction of the end block.
The arrangement of the plurality of through holes has a region formed so that at least one of the void volume or the number of the through holes gradually increases toward the direction in contact with the central block.
At least the through hole having the largest void volume among the plurality of through holes is arranged at the portion corresponding to the position in contact with the shoulder of the user in the supine posture, or the distance between the adjacent through holes and the through holes. The through holes are arranged so that the average value of is smaller than the average value in other parts.
A mattress characterized in that the second hardness adjusting means is a plurality of slits, through holes, or grooves formed on the upper surface or the lower surface of the central block. The mattress according to any one of claims 7 to 10, wherein the cushion material forming the central block and the end block is a resin foam, a three-dimensional network structure, or a cotton molded body. The minimum value of the apparent hardness in the hardness pocket is as a ratio to the value of the apparent hardness of the central portion of the central block (the minimum value of the apparent hardness in the hardness pocket / the value of the apparent hardness of the central portion of the central block). The mattress according to any one of claims 1 to 11, wherein the mattress is 0.3 to 0.6.

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