JP2000270972A - Improved mattress - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate stress by designing a mattress in such a manner that pockets are provided between the shoulder part and upper arm part symmetrically at the right and left, the upper corners are cut symmetrically, and a pillow is placed at an extended part along the back bearing part. SOLUTION: Pockets A are cut from the both upper corners, in which a part from the shoulder to the upper arm is downed and housed when laying on one's side. A back bearing part B of flat shape is provided at the upper center, from which a part D is extended to support a part from the upper back to the back of the head, and a pillow is used close to the part D. The longitudinal cross section of the part D corresponds to the air space of conventional products and supports the back and neck when laying on one's back. A part D1 effectively reduces stress of thorax 2 to thoraxes 4 to 5, and when a person turns to lay on his/her side and the under shoulder is placed at width W2 of the part D, the shoulder bone can be sunk into a part D2 smoothly if the part D2 is made of a very soft material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a mattress,
For more details, on an underlay mat or bedding,
Or an improved bedding with a new shape and structure to reduce physical stress at bedtime of the type used directly on the floor next to a pillow, and a backing based on the same for people with a bent back About mattress futon.

[0002]

BACKGROUND OF THE INVENTION It is clear that bedding is an important physical requirement affecting bedtime rest and sleep. According to one theory, the use of the modern futon in Japan began in the Edo period, and cotton was the main material (heart material). This traditional futon was only gradually improved and improved, but in recent years, with the advancement of science, various and various materials have been provided, the processing technology has advanced, and the bedding has been dramatically improved. It is getting.

[0003] The material of the bedding includes cotton, feathers, wool, pure cotton (silk), synthetic fiber (eg, polyester) cotton, and the like, which are elastic, warm, hygroscopic, and (absorbed moisture). It has been used for the purpose of obtaining comfortable sleep based on various required characteristics such as divergence and moisture permeability. In addition, with the expectation of health promotion or certain medical effects and other effects, there are also those in which magnets are buried and arranged, those that are filled with charcoal, and those that use far-infrared radiation materials.

[0004] Beds have been considerably used in accordance with changes in lifestyle in Japan, and various arrangements of springs have been devised. Further, air beds, water beds, etc., which are filled with fluid and sealed, have also been proposed. Regarding their internal structure, not only one-pack type but also pipe type, multi-chamber type, etc. are seen.

[0005] The bedding or bed has a good feel in addition to satisfying the temperature and humidity-related characteristic requirements, such as heat retention, heat dissipation, moisture absorption, (absorbed moisture) diffusion and moisture permeability, as described above. It should have appropriate elasticity and hardness. These latter physical properties are thought to be important for the posture of the body during sleep, especially for straightening the spine (as viewed from the front or back) so that it can be turned over without difficulty.

[0006] Pillows can also be mentioned as one of the beddings necessary for obtaining a good night's sleep. Pillows are also made from a variety of materials from ancient times, breathability, heat dissipation, moisture absorption, moisture release,
Various requirements such as thermal conductivity, elasticity, hardness and feel are taken into account.

An important factor in selecting a pillow is its "height", which generally depends on the height of the occipital region (hp) and the height of the cervical vertebrae (hc) in the supine position. It is often determined whether a comfortable fit is achieved (see FIG. 1). However, it is rare that the supine position is maintained during bedtime, and the patient turns from supine position to recumbent position by turning over several times to several tens of times, for example, about 20 times overnight, and is in the recumbent position. The time is considerably longer. In order to keep the cervical vertebra and the spine almost straight in the recumbent position without stress, the height of the occipital region (hp) and the height of the cervical vertebra in the above supine position (hp) due to the presence of the shoulder of the human body The comfortable pillow height selected according to hc) is generally too small, so to keep the cervical vertebrae and spine almost straight in a recumbent position, as shown in FIG. The pillow having a larger height (Hp) is preferable. Therefore, the pillow height (hp) selected as optimal for the supine position is too small for the optimal pillow height (Hp) for the recumbent position, and conversely, the optimal pillow height (Hp) for the recumbent position. ) Creates a dilemma that is too large for the optimal pillow height (hp) for the supine position. If the pillow is too low when lying down, the pressure on the shoulders will be large, and the head will bend and the neck will bend, causing stress on the neck and surrounding muscles. If the pillow is too low, the (rolling) angle of the turning becomes small (not reaching 90 °), and a sufficient change in posture cannot be obtained, or the (rolling) angle of the turning becomes large. (More than 90 °), which may lead to an excessively lowered posture, which may cause fatigue during sleep, sprains of the neck, stiff shoulders, and the like. Many commercially available pillows have an intermediate height between the above-mentioned hp and Hp. Therefore, even if the subject sleeps for a long time in the supine or lying position, fatigue may even occur.

Some recent pillows on the market have a low (concave) contact with the back of the head and relatively high both ends in order to keep the spine straight and natural even in a recumbent position.
However, it may not be smooth to move the head that was in the recess when lying in the unconscious or semi-conscious state while lying in a supine position to the relatively high end when rolling over. In many cases, the head is not completely turned sideways on both ends (rolling at almost one right angle), but in a halfway state at the middle inclined part (state where the neck is twisted by rolling at about half right angle) It may stay. Conversely, when lying down in the unconscious or semi-conscious state while sleeping, the head lying sideways at the relatively high ends of such a pillow rolls into the lower recess when turning over, the head is in the middle You may feel anxious about falling suddenly on the slope. Therefore, even if the above-mentioned commercially available pillows can be used with good usability at the time of awakening, it is not necessarily comfortable to turn over while sleeping unconsciously or semi-consciously.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a comfortable sleep by substantially reducing or eliminating the above-mentioned problems relating to pillows by devising the shape of a bed used together with the pillows. The purpose is. An object of the present invention is to provide the above-mentioned futon, which acts to relieve or eliminate stress generated in muscles of various parts of the body during activity while sleeping.

[0010] Many people complain that shoulder stiffness, neck pain, headache, and feeling of fatigue remain after waking, but the main causes are cervical spine,
It is believed that the stress on the muscles around the thoracic spine, lumbar spine, etc. is not released during bedtime but remains and accumulates. The stress on the muscles of the back is related to the shape of the person when standing (see FIG. 3), and the heavy head is supported by the spine and various muscle groups, ligaments and tendons around it. In the vertebral column, a large number of vertebrae such as cervical vertebra, thoracic vertebra, and lumbar vertebra are connected like a building block to form a loose S-shaped curve, thereby forming an important structure that functions as a cushion. Most of the time the head tilts forward except when a person is sleeping,
The force applied to the spine at this time is the same as when the bowstring is stretched, causing stress on the outside of the back. Such time typically lasts 16 hours or more per day, and it can be said that most of them are in a stressed state even if they stretch or turn their neck in the middle. The present invention provides an improved bedding which releases, reduces, and eliminates the physical stress generated during human activities including the above-mentioned stress at bedtime. The present invention further provides an improved mattress for the person with the back bent, further modifying the improved mattress.

[0011]

SUMMARY OF THE INVENTION Thus, the present invention provides a generally vertically rectangular planar shape of the type used adjacent to a pillow on an underlay mat or bedding, or on the floor,
An improved bedding having a certain thickness for reducing physical stress at bedtime, comprising: (i) turning the body approximately one right angle to the left or right from a sleeping posture on the vertical center line (X) of the elongated rectangular body. When laying down in a lying position by moving, the pockets (A, A) which can be accommodated in the lower part of the body from the shoulder to the upper arm in a substantially depressed state are provided symmetrically. (Ii) the pockets (A, A) are symmetrically cut off at both corners of the upper edge so as to leave the back supporting portion (B) in the shape of a chevron in the vicinity of the center of the upper edge of the elongated rectangular body. (Iii) In a supine position, the gap (C) that normally occurs at the step between the bed and the pillow is almost made up so that the body part from the upper back to the back neck can be seen from below. The supporting part (D) The improved bedding is provided in a form further extending from the back supporting portion (B) along the center line (X), and a pillow is used adjacent to the extending portion (D). .

When sleeping in a supine position, it is ideal to use a bedding that supports the head with uniform pressure from the back of the head to the cervical spine. Especially considering the pillow, the height of the cervical spine (Fig. 1
Hc) is an important factor in eliminating stress that occurs in the levator scapula from the neck to the shoulder and the muscles around it during waking and activity. In addition, in order to remove the stress generated during the activity from the back (corresponding to the thoracic vertebra) to the waist (corresponding to the lumbar vertebra), the force from the direction of the arrow (two places) in FIG. When using a bed with moderate hardness (for example, about 20 kg measured by JIS test method in the case of polyurethane), a moderate repulsive force is generated at the above arrow depending on the weight, and the stress It is effective to exclude. Even when sleeping in the supine position using the ideal combination of the pillow and the bedding, there is a space C shown by hatching in FIG. 1 due to the step between the pillow and the bedding. . In this space C, a force is applied from the chest to the back, and this force is in the same direction as the stress that occurs when a person is awake and active. The erector spinae muscles and other muscles are in tension, which can cause stiffness of the muscles from the back to the shoulder and does not provide a clean awakening. Therefore, in the present invention, in order to solve this problem, a part (D) for supporting the body part from the upper back to the back neck from below is provided by substantially compensating such a gap (C), and a pillow is provided in this part. Are used adjacent to each other.

Next, the condition of the bedding in the recumbent posture will be considered. The biggest problem when sleeping in a lying position is to minimize the pressure on the shoulders. As for the pillow, in order to solve the problem, the optimal height (Hp) of the pillow in the recumbent position is considerably higher than the optimal height (hp) of the pillow in the supine position. When the optimum height (Hp) of the pillow in such a recumbent position is calculated by ignoring sinking of the futon (see FIG. 4): Hp = (p−q) / 2−α . p is the width of the shoulder when the shoulder is shrunk, q is the width of the head, and α is a value that allows the head to lean naturally within a stress-free range when lying down, and is generally about It will be around 3cm. In order to eliminate the pressure on the shoulder in the recumbent posture, the difference between Hp and hp: H = Hp−hp must be considered. The difference H can be found by referring to FIG. 4 as follows: H = (p−r) / 2 (p is the shoulder width when the shoulder is shrunk; r is the chest width). This corresponds to the width of the hatched portion.

The inventor of the present invention considers that the upper arm comes from the shoulder to the lower side of the torso and applies pressure to the chest when lying down, and these parts themselves are pressed by their weight, so that their It was conceived to provide a pocket which can be accommodated with the part substantially depressed (or sunk) in the bed, symmetrically, and to leave the part supporting the back when lying on the bed in the center of the bed. In this case, the thickness of the bed (or the depth of the pocket) theoretically becomes the value of H, but the actual value varies depending on the elastic modulus of the material.
Therefore, as shown in FIG. 7, the bedding of the present invention is symmetrical with respect to the longitudinal center axis (XX) at both corners of the upper edge, and extends from the shoulder to the lower arm in the recumbent posture from the upper arm. A pocket (A, A) capable of accommodating the portion in a substantially depressed state is provided in a cut-out state, and a back support portion (B) having a mountain-shaped planar shape is provided near the center of the upper edge. A portion (D) for supporting a portion from the upper back to the back neck from below is extended from the upper edge of the back carrying portion. A pillow (height = Hp) is used adjacent to the extending portion (D). FIG. 5 shows an example of the mode of use. In this example, the bedding (b) of the present invention is laid together with a pillow (height = Hp) on a usual bedding or an underlay mat (a). (Hp is as defined above). The bedding of the present invention can be used without a usual bedding or an underlay mat (a). In this case, the thickness (H ′) of the main body is made larger than the theoretical value (H) (see FIG. 6). The improved bedding of the present invention, especially near the part (B),
Although it has a thickness theoretically equivalent to H as described above, it actually has a thickness greater than H due to factors such as the elastic modulus of the material because the futon itself sinks (compresses). There are some things you need to do. In short, the thickness of the bedding of the present invention, that is, the pockets (A, A)
The depth of the body is theoretically influenced by the physique (shoulder width, chest width, etc.) of each user, but in practice, the extent from the shoulder to the upper arm is substantially reduced Therefore, the chest compression from the shoulder to the upper arm and the pressure on the shoulder itself during the recumbent posture are effectively reduced.

The width W ₁ of the back support portion (B) in the shape of a chevron-shaped plane is about chest width r ± 2 cm, and the length L ₃ is the point K ₂
The distance between to the point K _3, point K ₂ corresponds to the vicinity of thoracic fourth (T4), the point K ₃ is in the vicinity of the solar plexus. A suitable length L ₂ + L ₃ for an adult is around 20 cm.

The length L ₁ + L ₂ of the extended portion (D) for further extending from the back carrying portion (B) and supporting the portion from the upper back to the back neck from below is from the point _Ko to the point K ₁ to the point K ₂
Is the distance between them. The point _Ko is a position in contact with the pillow, and corresponds to the vicinity of the 6th to 7th (C6 to C7) of the cervical spine.
₁ corresponds to the vicinity of thoracic No. 2 (T2), the point K ₂ are as described above. Approximate value of L ₁ is about 5cm and L ₂ approximately five
cm, and the total (L ₁ + L ₂ ) of both is about 10 cm
(Normal adult size). While the width W ₂ of the extension (D) in the specific example shown in FIG. 7 is smaller than the width W ₁ of the back bearing portion (B), the value of the neck is stable when the supine posture, for example, if about 18cm longitudinal Well, it may be that W ₂ = W ₁ . The cross-sectional shape of the extension portion (D) in the vertical direction (XX axis direction) roughly corresponds to the gap (C) in FIG. 1, and its function is to support the upper back to the back neck in the supine position from below. It is in.

The embodiment shown in FIG. 7 is a preferred example in which the extension (D) is composed of two blocks D ₁ and D ₂ , and may be composed of one block. In the illustrated example, D ₁ is via the thoracic No. 2 a (T2) thoracic 4-5 No. (T4 to T5) act to relieve stress in the vicinity of, its length L ₂ is approximately about 5cm as described above (Adult). The material of D ₁ is thoracic 1-5 with the body B
The rebound resilience and the hardness that support the number (T1 to T5) gently from below are required. In the case of foamed polyurethane, it is preferable that its hardness is around 20 kg (measured by JIS test method). D _2, the contact point between the pillow from thoracic No. 2 (T2), that is, located at 6-7 No. cervical (C6~C7), when the supine posture, head and cervical arc mainly pillow because and chest supported on is mainly supported by B and D _1, mechanical or mechanical function to support the D ₂ is not required much. However, D ₂ has an important meaning when the body shifts and the lower shoulder comes within the range of the width W ₂ of D (D ₁ + D ₂ ) when turning over to the recumbent posture. There is a possibility that the necessary sinking may not be performed sufficiently. Even in such a case, if a very soft material is used as D ₂ , the acromion (bone of the shoulder) located there can be sunk into D ₂ without difficulty. The hardness of the D _2, for example, in the case made of foamed polyurethane, are preferred the following hardness of about 5 kg (measured by JIS test method).

The direction (X) of the vertical central axis of the hatched portion (C) in FIG.
−X) is represented by the following formula: Lx = L1 + L2 + α where L1 and L2 correspond to D2 and D1, respectively.
α extends to the body (B). The appropriate value of α varies depending on the body type, and in the case of a standard person bending near thoracic vertebra 5 (T5), α = 0 to about 5 cm, while thoracic vertebra 8
In the case of a person with a so-called stoop shape that is bent near the turn (T8), α is about 10 to 15 cm.

Regarding the height, the height of the Ko point in FIG.
For the above-mentioned reason (D2 does not require mechanical and mechanical functions), there is not much problem. However, K of (D1)
The height at the position 1 is very important for relieving and eliminating stress. If the height is too large, stress may be created. Factors such as the hardness of the main body, the degree of sinking of the body, the height of the pillow used together, the body type, and the like are affected, but as an example, the hardness of the main body is less than 20 kg, the standard body shape, the height of the pillow ( hp) = 3 cm, (hc) = 6 cm
In the case of (Adult), the height above the point (K1) in FIG. 1C is about 1 cm. The body shape when the human body is viewed from the side can be roughly classified into an S shape and a flat shape (close to a straight shape).
In the case of the S-shape, it is considered that the hardness of the mattress is almost entirely uniform, but in the case of the flat type, it is better to be harder than the other parts in the buttocks-equivalent part and its vicinity. It is said that. Looking at the data on the posture during sleep, it is common that the lower part of the buttocks is larger than the lower part of the back. That is, it may be better to make the entire body (B) supporting the back harder or slightly thicker than the others.

The improved bedding of the present invention preferably has an appropriate hardness for each part as is apparent from the above. For example, when each part is made of foamed polyurethane, the hardness of the main body including the back support part (B) is about 20 kg as measured by the JIS standard test method, and about 20 kg and 5 kg for the extended parts D ₁ and D ₂ respectively. I think the degree is preferable. Such a hardness distribution can be achieved by laminating block materials having respective hardnesses (post-adhesion). However, for foamed polyurethane, different mixed stock solutions having a predetermined target hardness are continuously arranged in one mold. A method of making a molded product having partially different hardness in one step (that is, a foaming method of different hardness) has been put to practical use, and the bedding of the present invention can also be manufactured by this method.

FIG. 9 is a plan view showing a futon according to a modification of the present invention. This plan view is the same as that of FIG. 7, except that a low-hardness, flexible material (E) is replenished and arranged in a part or almost the entire area of the pocket (A, A) in FIG. The difference is that a hardness transition zone (E ') made of a material having a hardness between the two is provided between the shoulder portion of the main body and the material. Here, if the auxiliary bedding body, the low hardness, flexible replenishment arrangement material (E) and the hardness transition zone (E ') material are made of foamed polyurethane having different hardness, their appropriate hardness range is as follows.
About 15 to 25 kg, preferably about 20 kg (body), about 4 to 7 kg, preferably about 5 kg (E) and intermediate values of about 10 to 18 kg, preferably about 15 kg (E ′)
(All measured by the JIS test method). However, even though the hardness of polyurethane is the same, the way of feeling differs depending on the thickness of the thickness. Therefore, the above hardness is not an absolute value but changes depending on the thickness. The effects of the replenishment arrangement material (E) and the hardness transition zone (E ') in this modified embodiment are as follows.

When E and E 'as described above do not exist: (1) When the bed is turned over greatly and the bed is in the recumbent position, the bed (A, The flank of the human body in contact with the boundary with A), particularly the shoulder portion of the bedding, may be oppressed and uncomfortable.

(2) In the supine position, the upper arm (upper arm) is located along the longitudinal edge of the back carrying portion (B) in one pocket (A), but especially when the pocket (A) is deeper, Because it is hollow, it may float to some extent, causing an unstable feeling.

(3) When the woman is in the horizontal position, the breast is located at the pocket (A), which may cause a lack of stability and security as in (2) above. These problems (1) to (3) are substantially alleviated by providing the replenished flexible material (E) and the hardness transition zone (E ') as described above. In the case of the above (2), the part beyond the elbow is supported on the bedding body, and the upper arm is almost suspended in the pocket, but in such a case, it is extremely weak from below. Because it may be supported (for example, by touching lightly), a sense of stability and a sense of security are provided. The same applies to the case of the above (3). Therefore, in this modified embodiment of the present invention, the low-hardness, flexible material (E) is replenished and arranged at an appropriate place in the pockets (A, A) (a part or almost the entire area of the pockets). In the case of the above (1), the hardness transition zone (E) made of a material having an intermediate hardness between the hardness (very low) of the replenishment-placement flexible material (E) and the hardness (very high) of the bedding. By providing '), the pressure on the flank when lying down can be significantly reduced. That is, by softening the difference in hardness in the hardness transition zone (E '), it is possible to soften the contact with the flank. The width of the hardness transition zone (E ') may be about 3 cm. The longitudinal length of the replenishment arrangement material (E) is equal to or less than the longitudinal length (L _{3 in} FIG. 1) of the back support portion (B), for example, about 18 cm, and the width thereof is equal to that of the pocket (A). The same as the width is convenient for handling. The thickness of the replenishment arrangement material (E) may be the same thickness as the thickness of the bedding main body or a suitable thickness more than that. The above is just the thickness of the main body (H) and
The height (Hp) of the pillow is the ideal theoretical value. If the pillow is thicker and taller, the drop in the shoulder becomes correspondingly shallower. Therefore, when the thickness (H) of the main body is larger (thicker) than the ideal theoretical value, the flexible material (E) is formed over the entire area up to the (K _o ) point of the pocket (A, A) or the point of contact with the pillow. Should be replenished. As the body becomes thicker, its hardness may be reduced, and thus the hardness transition zone (E ')
May be omitted.

When the futon of the above-mentioned modified embodiment is made of foamed polyurethane, a material of different hardness having an appropriate hardness in each portion and a material having an appropriate size in each portion are post-bonded. Can be manufactured. Alternatively, it is also possible to efficiently manufacture a mold by continuously injecting mixed stock solutions having different hardnesses into one mold (mold) to obtain molded products having partially different hardnesses in one step.

The present invention also provides an assistive bedding for a person who has a bent back. (1) People who have a lot of desk work, people who do a lot of light work on a table, tall people, etc.
It is easy to bend permanently at the upper part of the back corresponding to the vicinity of No. 5, and (2) those who bend deeply and work are thoracic vertebrae 5-1
It is easy to bend permanently at the center of the back corresponding to the vicinity of No. 0. (3) A person who drives for a long time in a bad posture,
A person who sits down easily tends to be permanently bent at the lower part corresponding to the thoracic spine No. 10 or the sacrum No. 1. Humans exert stress on muscles, ligaments, tendons, etc. around the spine during work or activity, and if the stress is not released, they accumulate and lose the flexibility of muscles and ligaments, It is said that it becomes "lumps" and gradually becomes ossified, and this is the cause of the permanent bending as described above. (2) above
In the cases (3) and (3), the bend is generally large, and the pillow height (hp) suitable for the supine posture of such a person is often higher than the pillow height (Hp) suitable for the recumbent posture. . When a person in this condition takes a supine position, a space generated at a length (L _x ) from a point (K _o ) in contact with the pillow to a bent point (K _x ) on the back as shown in FIG. (Shaded area) becomes larger. Unless such a large space is filled, a good sleep cannot be obtained.

Therefore, the present invention provides, as still another embodiment,
An auxiliary bedding for a person with a back bent, wherein the thickness of the bedding from the bending point (K _x ) of the back to the pillow is matched to the degree of bending of the back. We also provide an increase. FIG. 11 is a plan view and FIG. 12 is a side view of an example of the auxiliary bed in this embodiment. The reference numerals in these drawings 11 and 12 are the same as or equivalent to those shown in FIGS. 7 to 9, but in this example, the vertical dimension (K _{o to} K _x , that is, L _x ) may be shorter.
Preferably, in the vicinity of K _x points (i.e. near the lower edge) are eliminated flexible material band (F) provided with discomfort during use to eliminate the step effect.

As described above, the improved bedding of the present invention is notched symmetrically in consideration of the drop of the elbow from the shoulder and the upper arm in the reclined position, and the neck support portion is further extended. , A double convex type (double Mt. Fuji type) or a convex type (Mt. Fuji type). Preferably, the notch is filled with a material having a very low rebound resilience. The mattress of the present invention can be made of any material by combining the materials of the conventional mattresses, as long as the material has a function suited to the purpose in terms of shape and elasticity and hardness of each part. However, since foamed polyurethane materials are easily available in various hardness and elasticity, and processing technology capable of manufacturing various molded products of different hardness has been established. Material.

The dimensions of each part of the improved bedding of the present invention and, in some cases, hardness, elastic modulus, etc., depend on the physique and weight of the individual user. By aligning them, it is possible to sufficiently respond to demand.

The bedding of the present invention is suitable not only for healthy persons but also for assisting the sick and elderly, and is particularly effective in preventing floor rubbing due to its ease of turning over. In general, misplacement (misalignment of the neck), which may occur suddenly when turning over, can be effectively prevented by using the improved bedding of the present invention.

[Brief description of the drawings]

FIG. 1 is a side view of sleeping in a supine position using a pillow.

FIG. 2 is a sketch of a sleeping head in a lying position using a pillow.

FIG. 3 is a human spine curve diagram in a standing posture.

FIG. 4 is a front view of a human body.

FIG. 5 is a side view of an example of using the improved bedding of the present invention.

FIG. 6 is a side view of an example of use without the underlay mat of the improved bedding of the present invention.

FIG. 7 is a plan view of a basic concept of an auxiliary mattress.

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a plan view of a modified example of a modified mattress.

FIG. 10 is a side view of a person with a bent back in a supine position.

FIG. 11 is a plan view of a modified example of the auxiliary mattress.

FIG. 12 is a side view of FIG. 11;

[Explanation of symbols]

 A pocket B back support C step gap D neck support extension E flexible filler E 'hardness transition zone

Claims (3)

[Claims] 1. An improvement for reducing physical stress at bedtime having a thickness of a generally vertically rectangular shape of a type used adjacent to a pillow on an underlay mat or bedding and on a floor surface and having a certain thickness. The bed is: (i) a body lying on the vertical center line XX of the elongated rectangular body from the lying supine position to the left or right by turning the body approximately one right angle and turning over to the lying position; (Ii) symmetrically provided with pockets (A, A) capable of accommodating a portion from the shoulder portion to the upper arm portion in a substantially depressed state, (ii) the pockets (A, A) The upper rectangular portion is formed in such a state that both corners of the upper edge are cut off symmetrically so as to leave the back supporting portion (B) in the shape of a chevron in the vicinity of the center of the upper edge of the elongated rectangular body. (Iii) Supine posture Sometimes, usually, from the mattress to the pillow A part (D) for almost completely filling the gap (C) generated at the step and supporting the body part from the upper back to the back neck from below is provided with a center line (XX) from the back carrying part (B). ) Along with an extension
The improved futon as described above, wherein a pillow is used adjacent to the extension (D). 2. A low hardness, flexible material (E) is replenished and arranged over a part or almost the entire area of the pockets (A, A),
2. A hardness transition zone (E ') made of a material having a hardness intermediate between the hardness of the material (E) and that of the material (E), between the shoulder portion of the bedding main body and the material (E). Mattress. 3. The bedding of claim 1 or 2 for assisting a person whose back is still bent, wherein the thickness of the back from the bending point (K _x ) to the pillow is adjusted by the back. 2. The method according to claim 1, wherein the number of the bending is increased in accordance with the degree of the bending.
Or two mattresses.