Upper body mattress

Abstract

When lying on your back on a bed mattress or futon, the ability to adjust the height of your head using something other than a pillow makes it easier to fall asleep, prevents your body from sliding down while sleeping, and keeps the esophagus higher than the stomach when lying on your back, thus preventing stomach acid from refluxing into the esophagus. [Solution] By stacking multiple wedge-shaped upper body mattress units 9 (Figure 1), each with different heights of opposite sides 15, at the connecting part 6 to form a single unit, a wedge-shaped upper body mattress 1 (Figure 2) is created, which has wedge-shaped upper body mattress units A, B, and C of different heights. This is then inserted under the mattress or futon of the bed currently in use, and the height of the mattress 24 is adjusted by deflating one of the wedge-shaped upper body mattress units A, B, or C.

Description

Technical Field

[0001] When the ring-shaped esophageal sphincter at the entrance of the stomach from the esophagus swallows food, the muscle opens, and when the food enters the stomach, it closes, playing a role like a stopper to prevent gastric juice and the contents of the stomach from flowing back into the esophagus. However, when it weakens due to aging or the like, the cardiac sphincter remains open. When a person is awake, the esophagus is located at the upper part of the stomach body, but when lying on the back, the stomach body and the esophagus become substantially horizontal. Therefore, gastric juice and the contents of the stomach flow back from the cardiac sphincter into the esophagus, leading to reflux esophagitis and causing symptoms such as heartburn. The present invention aims to prevent reflux from the stomach to the esophagus even when lying on the back for sleep, so as to prevent symptoms such as heartburn. The present invention relates to a wedge-shaped upper body mattress, which is a medical device, and is formed by integrally stacking a plurality of upper body mattresses 1 (Figure 2) with a height of 24 and an inflatable airbag at the joint 6 of the upper body mattress 9 (Figure 1) that can adjust the height, and inserting it between the mattress 20 and the bottom plate 22 of the bed frame 21 (Figure 4), or inserting it between the futon and the tatami (floor) for use.

Background Art

[0002] According to Non-Patent Document 2, in Japan, one in five adults is a sufferer of reflux esophagitis (GERD), and in the United States, 30% of people are sufferers. For this reason, triangular cushions molded from low-rebound foamed resins (such as low-rebound urethane resins) that are expected to be effective against reflux esophagitis are widely available on online shopping platforms.

[0003] These cushions cannot adjust the height of the side opposite the hypotenuse, so they do not fit everyone's body type. Also, since they are placed on the bed and the body is directly on them while lying supine, they can shift during sleep. While the rebound force of the bed is the same on all sides, triangular cushions made of low-rebound urethane resin, etc., which are thicker at one end and thinner towards the other, have different rebound forces depending on the thickness of the part they are placed on. Furthermore, the rebound force also differs from that of the bed. As the thickness naturally decreases near the feet, the rebound force decreases, so the rebound force of the triangular cushion in the abdominal area is less than that of the head and shoulders, where the stomach is located. This causes the abdominal area where the stomach is located to sink and curve, compressing the stomach and making it easier for stomach acid to reflux. It can also cause discomfort, and each time you turn over in your sleep, your entire body moves downward from the supine position, and the esophagus cannot maintain a position higher than the stomach, so it may not be effective for reflux esophagitis. In addition, the height of the triangular cushion needed varies from person to person, but the height could not be adjusted.

[0004] Patent Document 1, Utility Model Registration No. 3192339 (Air Pillow), describes an air pillow for health and beauty use in exercises for health and beauty. This air pillow has a triangular sheet with three sides connected to the three sides of the triangular sheet, so that when the air bag is inflated, it takes the shape of a triangular tube T with rounded corners (ridge lines). A regulating member is provided on the inner surface of the cylindrical sheet to restrict the outward expansion of the three sides by pulling adjacent sides of the triangular tube together. This regulating member is made of a thermoplastic sheet welded between adjacent sides of the three sides. While this air pillow is good for supporting and moving a part of the body for exercise, it is not suitable as a pillow for preventing reflux esophagitis while sleeping in a supine position. This invention differs from the wedge-shaped upper body mattress 1, which has adjustable height, in which the connecting parts 6 of multiple upper body mattress units 9 of different heights that are inflated with air are stacked vertically and integrated.

[0005] Patent Document 2, Utility Model Registration No. 3243986, "Under-Mat Space Support Material for Horizontal Sleeping on Outdoor Sloping Ground," is used perpendicular to the direction of flow on outdoor slopes from high ground to low ground. By lying on one's back perpendicular to the direction of flow, the mattress etc. becomes horizontal, improving sleeping comfort on sloped ground. The main body 1, made of appropriate material such as vinyl, is divided into multiple separate air chambers horizontally inside, which can distribute body pressure. However, as the name "Under-Mat Space Support Material for Horizontal Sleeping on Outdoor Sloping Ground" suggests, when the ground 4 on which a tent 5 is set is gently sloped from high ground to low ground in a campsite or outdoors, the purpose is to allow the user to lie on their back perpendicular to the flow from high ground to low ground, so that the height of the left and right sides of the body can be kept nearly horizontal even on sloped ground. However, it is impossible to use it as a pillow to prevent reflux esophagitis while sleeping on one's back. This invention differs from the wedge-shaped upper body mattress 1, which has adjustable height, in which the connecting parts 6 of multiple upper body mattress units 9 of different heights that are inflated with air are stacked vertically and integrated.

[0006] Patent Document 3, Japanese Patent Application Publication No. 2013-116190, describes a bed device that, even with a small blower with a low airflow, can sufficiently rotate a person on the bed (on the mattress) from side to side to allow them to turn over. This device is primarily used to lift and tilt the left and right sides of the bed alternately in order to allow patients who have difficulty turning over, such as chronic bedridden patients, to turn over in order to prevent the development of bedsores, and it is not suitable as a device to alleviate or prevent reflux esophagitis. This invention differs from the wedge-shaped upper body mattress 1, which has adjustable height, in which the connecting parts 6 of multiple upper body mattress units 9 of different heights that are inflated with air are stacked vertically and integrated.

[0007] Patent Document 4, Utility Model Registration No. 3177474, describes a foldable connection between a first mat, which mainly supports the upper body and has a slope angle and shape that allows for comfortable sleep, and a second mat, which mainly supports the lower body. When these mats are unfolded and laid out, the first mat has a back support surface that slopes from its top to its bottom with respect to the laying surface. Furthermore, the second mat 1b is a mat for treating reflux esophagitis, which has a horizontal surface provided for a predetermined length from the connecting part to its approximate center and a leg support surface that slopes from the end of the horizontal surface toward the bottom of the mat. However, the height of the solid mat cannot be changed, and since it is joined at the approximate center 2a, the effect may not be expected depending on the person's physique. When this mat, which has a certain degree of hardness, is used on top of a soft futon or bed, the entire mat shakes on the mattress with each turn in bed, making it unstable and difficult to sleep. This invention differs from the wedge-shaped upper body mattress 1, which has adjustable height, in which the connecting parts 6 of multiple upper body mattress units 9 of different heights that are inflated with air are stacked vertically and integrated.

[0008] Patent Document 5, Utility Model Registration No. 3201679, describes a mattress with low elasticity and firmness, with a fold-over slit 2 formed in the center of its longitudinal direction. One side is designated as the upper body area and is tilted diagonally upward, while the other side is designated as the lower body area, with a 3-point 8 area 8 tilted diagonally upward approximately 10 minutes from the center and the remaining 7-point area forming a horizontal surface. By placing a futon on top of this mattress and sleeping on it, the upper body can be raised with the head elevated and the lower body with the legs elevated. Furthermore, when not in use, it can be folded in half for storage. This single mattress allows for sleeping with the head elevated, the upper body tilted, and the legs elevated, making it a health mattress that can improve and prevent reflux esophagitis. However, since a solid mattress cannot have its height changed, and because it has an uneven surface, it is difficult to place a mattress specifically designed for bedding on top of it, so only a futon mattress can be used. This invention differs from the wedge-shaped upper body mattress 1, which has adjustable height, in which the connecting parts 6 of multiple upper body mattress units 9 of different heights that are inflated with air are stacked vertically and integrated.

[0009] Patent Document 6, Utility Model Registration No. 3238535, describes a pillow and pillow set for napping and resting, which allows a user suffering from, for example, reflux esophagitis, to lie down while sleeping or resting in a very relaxed state, preventing the body from sliding down, and tilting the upper part of the stomach with a simple structure. The pillow consists of an upper body tilting pillow 1 that tilts the head and waist area of ​​a person lying on their back upward by a range of 5 to 40 degrees from the waist, and a foot tilting pillow 2 that is placed on the person with their knees raised and toes lowered, tilting upward by a range of 5 to 40 degrees from the toes. At least the foot tilting pillow is a triangular body on which the head and body are placed, and the feet are placed on a pair of triangles, with the sides opposite the base point being foldable via a hinge. However, the height of the solid triangular body cannot be adjusted, and since the knees of the legs are bent on the vertices (ridges) of the triangular body, when you try to roll over, your knees bend into a "V" shape and the inside of your knees hit the vertices, so you cannot tilt your knees sideways at all and therefore cannot roll over. The wedge-shaped upper body mattress 1, which is height-adjustable and is formed by stacking and integrating the connecting parts 6 of multiple upper body mattress units 9 of different heights that are inflated with air, is inserted under a conventional mattress, etc., and pushes up the head side. As a result, a fold occurs near the pelvis in the conventional mattress, but the angle is approximately 169 to 173 degrees, which is within the range acceptable for lying on one's back and is closer to the feet than the pelvis, so it does not restrict turning over even if the knees are bent.

[0010] However, the height-adjustable upper body mattress 1 of the present invention is made of a thermoplastic resin sheet 12, with an adjacent side 14 having an interior angle with the opposite side 15 extended to form a wedge-shaped cross section from the upper end of the opposite side 15 to the tip of the adjacent side 14 to the intersection 31, where the diagonal side 13 and the adjacent side 14 are overlapped and sealed by welding at the intersection 31, and a joint 6 is provided with multiple holes 7 by further extension, and a side 16 with an air valve 2 is welded, and a partition sheet Multiple sections of section B3 are welded to the inside of the hypotenuse 13 and adjacent sides 14 to form a wedge-shaped upper body mattress unit 9 that is inflated with air to create a sealed container (Figure 1). Multiple connecting sections 6 of upper body mattress units 9 with different heights of opposite sides 15 are stacked vertically and integrated to form an upper body mattress 1 that includes multiple upper body mattress units A (17), upper body mattress units B (18), and upper body mattress units C (19) (Figure 2).

[0011] The present invention relates to a wedge-shaped upper body mattress used to prevent reflux esophagitis, which is inserted under a bed mattress or futon. The height of the mattress (24) can be changed by deflating one of the upper body mattresses A (17), B (18), or C (19). While the present invention addresses some of the same problems as Patent Documents 1, 2, and 3-6, it differs in form, embodiment, and effect.

[0012] Definition of the term In this invention, the following are wedge-shaped upper body mattress units 9 with different heights of opposite sides 15: Unit A (17), Unit B (18), Unit C (19) (Figure 2). Multiple such units are referred to as upper body mattress units A, B, and C. A single unit that is not connected vertically by a joint 6 is defined and referred to as upper body mattress unit 9 (Figure 1).

[0013] Regarding reflux esophagitis, in addition to drug treatment, medical institutions recommend the following preventive measures: refraining from eating or drinking for two hours before going to bed, avoiding slouching to prevent pressure on the stomach, sleeping on your left side, and elevating your head by 15-20 cm while sleeping. (See non-patent literature) [Prior art documents] [Patent Documents]

[0014] [Patent Document 1] Utility Model Registration No. 3192339 [Patent Document 2] Utility Model Registration No. 3243986 [Patent Document 3] Japanese Patent Publication No. 2013-116190 [Patent Document 4] Utility Model Registration No. 3177474 [Patent Document 5] Utility Model Registration No. 3201679 [Patent Document 6] Utility Model Registration No. 3238535

[0015] [Non-Patent Document 1] Five ways to treat reflux esophagitis at Amagadai Family Clinic. https: / / amagadai-fc.com / gyakuryusei_shokudoen_20220515 / [Non-Patent Document 2] Current Status and Prevention Efforts Regarding Reflux Esophagitis: From My Own Research on Reflux Esophagitis - Masahiro Sogabe [Overview of the project] [Problems that the invention aims to solve]

[0016] The problem to be solved is reflux esophagitis. The ring-shaped esophageal sphincter at the entrance of the esophagus into the stomach, the cardiac sphincter, opens when swallowing food, closes after the food enters the stomach, and acts like a stopper to prevent gastric juice and gastric contents from flowing back into the esophagus. However, it occurs when the sphincter remains open due to aging or the like. When not lying supine, the esophagus is located in the upper part of the gastric body. When lying supine at bedtime or the like, the gastric body and the esophagus become substantially horizontal, so gastric acid (gastric juice) in the stomach passes through the cardiac sphincter, which is the junction of the stomach and the esophagus, and flows out into the esophagus located in the upper part of the gastric body. Since the esophageal mucosa is weak against gastric acid, it causes inflammation in the esophagus. To prevent gastric juice from flowing out of the cardiac sphincter into the esophageal part even when lying supine, the esophageal part is kept at a position higher than the gastric body. It is provided as an inexpensive upper body mattress 1 that can adjust the height of the mattress and is comfortable to sleep on, and is inflated with air as a general medical device (Class I) based on the Pharmaceutical and Medical Device Act (PMD Act).

Means for Solving the Problem

[0017] At bedtime, in order to prevent gastric acid (gastric juice) in the stomach from passing through the cardiac sphincter and flowing into the esophagus, and to make the esophagus higher than the gastric body even when lying supine, between the mattress 20 of the bed and the bottom plate 22 of the bed frame 21 (Fig. 4), or between the futon and the tatami (floor), from the head side 10 to the foot side 11 at the joint 6, insert an upper body mattress 1 with a wedge-shaped cross-section whose height of the inflated mattress 24 is adjustable. By pushing up the head side 10 of the mattress 20 of the bed, the mattress 20 of the bed is pushed up with the vicinity of the pelvis as the starting point, and the esophagus is kept higher than the gastric body even when lying supine (Fig. 4). In this way, without directly contacting the user, by indirectly pushing up the head side 10 with the currently used mattress 20 of the bed or the futon, what is under the body is the familiar mattress 20 or futon that is currently being used, so there is no sense of discomfort when lying supine, and a conventional familiar pillow can be used.

[0018] A sheet 12 of a thermoplastic resin such as high-density polyethylene (HDPE) or low-density polyethylene (LDPE) has inner angles on the adjacent side 14 and the opposite side 15 so that the cross-sectional shape is wedge-shaped with the hypotenuse 13, the adjacent side 14, and the opposite side 15. A plurality of sheet B3s are welded inside the hypotenuse 13 and the adjacent side 14, and the side surface 16 provided with the hypotenuse 13, the adjacent side 14, the opposite side 15, and the air valve 2 is hermetically welded with the welded part 5. The joint parts 6 of a plurality of upper body mattress units 9 (Figure 1) with different heights of the opposite side 15 are stacked vertically and integrally welded, or adhered with double-sided tape or the like, or fastened with a surface fastener, or fastened with a string or the like using the holes 7, (Figure 2). The main feature is to fix the both side ends of the head side 10 where the sheets 12 of the hypotenuse 13 and the adjacent side 14 of each of A, B, and C of the upper body mattress unit inflated with air are in contact with a surface fastener or the like so that the head side 10 does not sway laterally. (Figure 2)

[0019] The length of the hypotenuse 13 is set to the length up to the vicinity of an average pelvis. When this upper body mattress 1 is inserted between the mattress 20 and the bottom plate 22, the mattress 20 on the head side 10 of the bed is pushed up by the upper body mattress 1 and gently bends in an inverted "V" shape near the pelvis, but slopes upward from near the pelvis to the head and does not bend near the dovetail, so as to eliminate the pressure on the abdomen (stomach) and prevent the esophagus from being lower than the stomach body.

Effect of the Invention

[0020] The upper body mattress 1 (Figure 2) of the present invention having a wedge-shaped cross-sectional shape is composed of each of A, B, and C of a plurality of upper body mattress units with different heights of the opposite side 15. Therefore, by not inflating air into one of each of A, B, and C of any upper body mattress unit, the mattress height 24 (Figure 2) can be changed to provide an upper body mattress 1 with a height adapted to the user.

[0021] The upper body mattress 1 is used under mattress 20 or a futon, not on top of the bed mattress. Therefore, the body is under the familiar mattress 20 or futon. Furthermore, mattress 20 slopes linearly down to the pelvis without any bends, so there is no bending at the solar plexus, which does not compress the abdomen (stomach). Moreover, because it slopes upward from the pelvis towards the head, the esophagus is higher than the stomach, so stomach acid does not reflux from the stomach into the esophagus, which has the advantage of preventing reflux esophagitis. It can be used without discomfort, and can be used without discomfort even when not suffering from reflux esophagitis. It also has the advantage of making it difficult to raise the chin, which reduces snoring.

[0022] Furthermore, the adjustable mattress height of 24mm allows it to be used by people of all body types. By using the upper body mattress 1 between the mattress 20 and the baseboard, on the underside of the mattress 20, it was possible to eliminate the pain of heartburn and other discomfort for people with reflux esophagitis. The applicant had reflux esophagitis and found that raising his head as instructed by his doctor relieved his heartburn. [Brief explanation of the drawing]

[0023] [Figure 1] Figure 1 is a partial cross-sectional perspective view of the upper body mattress unit 9, before the upper body mattress units A, B, and C, which have a wedge-shaped cross-sectional shape as shown in Figure 2 and differ in the height of opposite sides 15, are integrated at the joint 6. [Figure 2] Figure 2 is an oblique view of the upper body mattress 1, in which multiple upper body mattresses 9 from Figure 1 are stacked and fixed below each other by the connecting part 6. [Figure 3] Figure 3 shows a wedge-shaped cross-section consisting of hypotenuse 13, adjacent sides 14, opposite sides 15, and side surface 16, which is inflated with air and divided into multiple layers vertically, with an air valve 2 provided in each layer. [Figure 4] Figure 4 shows the upper body mattress 1 in use on a bed. [Modes for carrying out the invention]

[0024] The upper body mattress unit 9 is made of a thermoplastic resin sheet 12 such as high-density polyethylene (HDPE) or low-density polyethylene (LDPE), with adjacent sides 14 and opposite sides 15 having an interior angle, the length of adjacent side 14 being the length of an average person's sitting height (from the top of the head to the pelvis), the hypotenuse 13 extending from the upper end of opposite side 15 to the tip of adjacent side 14, overlapping the sheet 12 of hypotenuse 13 and adjacent side 14 from the intersection point 31 (vertex) where they overlap, further extending and welding to form a joint 6 with multiple holes 7, multiple sheets B3 (Figure 1) are welded to the inside of the hypotenuse 13 and adjacent side 14 which are sheets 12, and the side 16 equipped with an air valve 2 is welded at the welding part 5 to form a wedge-shaped sealed container, the upper body mattress unit 9 (Figure 1) has different heights of opposite sides 15 which are inflated with air.

[0025] Multiple upper body mattress units 9 (Figure 1) with different heights of opposite sides 15 are stacked vertically and welded together at a joint 6 with multiple holes 7, or attached with double-sided tape, etc., or fastened with hook-and-loop fasteners 4, or fastened with string, etc., at the holes 7 to form a pair and integrate them, thereby providing multiple upper body mattress units A (17), upper body mattress unit B (18), and upper body mattress unit C (19) with different heights of opposite sides 15 (Figure 2).

[0026] Velcro fasteners 4 are provided at both ends of the head-side 10 on the hypotenuse 13 and the adjacent side 14 to prevent the head-side 10 from swaying laterally. As a result, the mattress height 24 of the upper body mattress 1 is made up of multiple layers consisting of upper body mattress A + upper body mattress B + upper body mattress C. When all layers are inflated with air, the esophagus is kept above the stomach even when lying on one's back, preventing gastric juices from refluxing from the stomach into the esophagus. If the mattress height 24 is too high, the mattress height 24 can be changed by releasing air from one of the layers. This is an upper body mattress 1 with an adjustable inflated mattress height 24. (Figure 2) The upper body mattress 1 is used by inserting it under the bed mattress 20 or futon. By pushing up the head end 10 of the bed mattress 20, the head end 10 of the bed mattress 20 is pushed up starting from near the pelvis, so it does not directly touch the human body. The only thing that comes into contact with the human body is the bed mattress 20 or futon that is on top of the upper body mattress 1. [Examples]

[0027] Figure 1 shows a thermoplastic resin sheet 12, with an adjacent side 14 having an interior angle with the opposite side 15 extended, and a hypotenuse 13 extended from the upper end of the opposite side 15 to the tip of the adjacent side 14, forming a wedge-shaped cross-section to the intersection 31. At the intersection 31, the sheets 12 of the hypotenuse 13 and adjacent side 14 are overlapped and sealed by welding. A joint 6 with multiple sealed holes 7 is provided at the tip of the intersection 31, and a side 16 with an air valve 2 is welded. Multiple partition sheets B(3) are welded to the inside of the hypotenuse 13 and adjacent side 14 to form a sealed container that can be inflated with air. The length of the adjacent side 14 is the average sitting height from the top of a person's head to near the pelvis. The container is made of thermoplastic resin and has a wedge-shaped cross-section, with the height of the opposite side 15 differing from the others. [Examples]

[0028] Figure 2 shows an upper body mattress 1 made of thermoplastic resin that can be inflated with air, characterized by the ability to change the height of the mattress 24. The mattress 1 is made of thermoplastic resin and has a wedge-shaped cross-section. The connecting parts 6, which have multiple holes 7, are stacked on top of each other and fastened together by welding, adhesive, hook-and-loop fasteners, or by fastening them together with string or the like at the holes 7. The combined upper body mattress 1 has multiple upper body mattresses A (17), B (18), and C (19) with different heights of opposite sides 15, and hook-and-loop fasteners 4 are provided at both ends of the head side 10 of the hypotenuse 13 and adjacent side 14.

[0029] For example, if you use two upper body mattresses (9) with opposite sides (15) that are 120mm, 50mm, and 30mm high, the total mattress height (24) will be 200mm. This falls within the 150mm-200mm range that doctors recommend, where the head end should be higher. By releasing air from one of the sections, the mattress height (24) can be adjusted from 200mm to 170mm, or 150mm, or 120mm. This is an upper body mattress (1) with a wedge-shaped cross-section. [Examples]

[0030] Figure 3 shows that adjacent side 14 and opposite side 15 form an interior angle, and the length of adjacent side 14 is measured from the top of an average person's head to the vicinity of the pelvis. The length is set such that the hypotenuse 13 extends from the upper end of the opposite side 15 to the tip of the adjacent side 14, and the intersection of the adjacent side 14 and the hypotenuse 13 Let point 31 be the point, overlap the adjacent side 14 and the hypotenuse 13 and extend further to form the joint 6, and air valve 2 The side 16 equipped with is welded to form a wedge-shaped sealed container, and the inside of the mattress height 30 is of different heights A single upper body piece with a wedge-shaped cross-section was created by dividing it into multiple sections vertically so that the opposite side B(25) is the same. Body mattress D (27), upper body separate mattress E (28), upper body separate mattress F (29) Multiple sheets B(3) are provided on the inside of each, and a side 16 equipped with an air valve 2 is welded to the side. A thermoplastic resin mattress with adjustable height (B(30)) and an air-inflatable cross-section with a wedge shape. Upper body mattress 1. [Examples]

[0031] Figure 4 is a side view of the method of use of the upper body mattress 1 on a bed. The upper body mattress 1, which has a wedge-shaped cross-section, is inserted between the head side 10 of the bed frame 21 and the mattress 20, with the connecting part 6 at the foot side 11. This pushes up the head side 10 of the mattress 20, keeping the esophagus higher than the stomach during sleep. [Explanation of Symbols]

[0032] 1 Upper body mattress 2 Air valve 3 Seat B 4-way fastener 5 Welded area 6 Joint part 7 holes 8 ventilation holes 9. Upper body mattress only 10 Head side 11. Foot side 12 sheets 13 Hypotenuse 14 Adjacent side 15 opposite sides 16 Side view 17 Upper body mattress only A 18 Upper body mattress only B 19 Upper body mattress only C 20 mattresses 21 Bed Frame 22 Bottom plate 23 boards 24 mattress height 25 Opposite side B 26 pillows 27 Upper body mattress only D 28 Upper body mattress only E 29 Upper body mattress only F 30 Mattress Height B 31 intersection

Claims

1. An upper body mattress 1, which is inflatable with air and has a wedge-shaped cross-section that allows for height adjustment, is used to prevent reflux esophagitis and is inserted under the currently used mattress 20 or futon. In an air-inflatable upper body mattress (9) having a wedge-shaped cross-section, the mattress is constructed by extending an adjacent side 14 that has an interior angle with the opposite side 15, extending a hypotenuse 13 from the upper end of the opposite side 15 to the tip of the adjacent side 14, and creating an intersection point 31 where the sheet 12 of the hypotenuse 13 and the adjacent side 14 are overlapped and sealed by welding at the intersection point 31, welding a side 16 with an air valve 2, and providing a joint 6 with multiple holes 7 at the tip of the intersection point 31, The upper body mattress 1 is made of thermoplastic resin that can be inflated with air, and has a wedge-shaped cross-section. It is characterized in that the connecting part 6, which has multiple holes 7, of multiple upper body mattress units (9) with different heights of opposite sides 15 is stacked on top of each other and fastened together by welding, adhesive, hook-and-loop fasteners, or fastened together with string or the like at the holes 7, thereby integrating multiple upper body mattress units A (17), upper body mattress unit B (18), and upper body mattress unit C (19), which have different heights of opposite sides 15, and hook-and-loop fasteners 4 are provided at both ends of the head side 10 of the hypotenuse 13 and adjacent side 14, and the height of the mattress 24 can be changed. (Examples 1 and 2)

2. From the upper end of the opposite side 15 of the sheet 12, extend the hypotenuse 13 to the tip of the adjacent side 14, up to the intersection 31. The cross-sectional shape is wedge-shaped, and at the intersection 31, the hypotenuse 13 and the adjacent side 14 are overlapped and further extended and sealed by welding. The joint portion 6 is formed by welding the side surface 16 equipped with the air valve 2 to it, creating a wedge-shaped sealed container. By dividing the inside of the mattress height B (30) into multiple sections vertically with opposite sides B (25) of different heights, the aforementioned air... Inflatable upper body mattress D (27), upper body mattress E (28), upper body mattress A mattress with a body mattress F (29) and a mattress height B (30) that can be adjusted is an air-filled mattress. An upper body mattress 1 made of a thermoplastic resin, having a wedge-shaped cross-section, as described in claim 1. (Example 3)

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