JP2007037912A - Pillow adjustable in height - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pillow, which can be easily adjusted in height by the user and which enables the user to easily shift sleeping positions. <P>SOLUTION: The pillow is constituted of a main part A made of a three-dimensional textile elastic layer 3 of a plurality of superposed three-dimensional textile elastic sheets 3a ... and a synthetic resin independent foamed layer of a plurality of superposed synthetic resin independent foamed elastic sheets 2a ... and an adjusting part B having at least a sheet of synthetic resin independent foamed elastic sheet 4aa under the main part A. The main part A is accommodated in an inner bag 6 in distinction from the adjusting part B, which can be adjusted in height by the user by adding or reducing its components. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an improvement of a macula that recovers or reduces cervical vertebral symptoms such as shoulder stiffness and numbness of the hand, and can easily turn over during sleep, and the height of the macula when the head is placed on the macula. Therefore, it is intended to provide a macula that can be adjusted to a durable height without greatly changing.

Many of the macula are in good contact with the head and can be supported softly and stably as a whole from the neck or its vicinity to both shoulders.
As for the material of the macula, a synthetic resin foam such as a buckwheat husk, rice husk, fiber lump, synthetic resin pipe-like piece, ceramic piece, expanded polystyrene beads, or urethane resin is molded into a rectangular or thin plate shape. Are often used, but the feel and feel are often selected according to the user's preference, mood, or other circumstances, and the hardness and softness, as well as the shape and structure, vary greatly. The current situation is.

  The main structure is, for example, A) A cushion layer made of a synthetic resin foam is disposed below as a macula for the purpose of promoting blood circulation of the user's head, neck and shoulders, and a plurality of cushions are provided on the cushion layer. A laminated body is formed by laminating a composite layer of cushioning material with high air permeability and low heat storage using the material, and the laminated body is accommodated in a mesh bag. Furthermore, a large number of magnet pieces are contained in the mesh bag. Has been proposed by dispersing and fixing (see Patent Document 1).

  B) In addition, a plurality of height-adjusted synthetic resin foam sheets are stacked on the upper part of the main body, and the upper part is covered with a surface clothing that is in direct contact with the head and neck, and the end faces the bottom of the main body. A macula having a structure stopped with a fastener is also proposed (see Patent Document 2).

  C) Also, it is placed on both sides of the central macula body that keeps the height of the occipital region on its back and the central macula body to keep the temporal position of the temporal region sideways, and is higher than this macula body There has been proposed a macula in which a central portion made of a macula body has a concave step, and the macula body is integrally formed with a foam body made of expanded styrene.

  In this publication, when the body is turned over and turned sideways, the head does not tilt from the neck, the head can be kept at a height that touches the macula, and the back and neck are not distorted abnormally. (See Patent Document 3).

  D) Further, a user forms a concave portion in conformity with the back of the head with the head placed on the back of the pillow, and is molded with an elastic body that combines the convex portion that supports the neck portion continuously with the concave portion. There has been proposed a structure in which a plurality of elastic plates are used (see Patent Document 4).

E) Furthermore, in a macula that is made up of a plurality of synthetic resin foam plates stacked in a rectangular shape, the user can change the posture of the macula while changing the posture to both the supine and sideways according to the user's physique (height and weight). There has been proposed a method for adjusting the height of the macula that reduces the cervical vertebral symptom by making it possible to turn over naturally by finely adjusting the height (see Patent Document 5).
JP-A-10-94467 JP 2001-169887 A JP-A-9-215573 JP 2001-31430 A Japanese Patent Application Laid-Open No. 2004-209099

  The macula described in Patent Document 1 has a rectangular shape with a flat surface as shown in the drawing. In this macula, it is described that by using a flexible material, the portion where the head hits can be freely deformed according to the movement of the head during sleep and the head contact can be smoothly and smoothly stabilized.

  However, this makura is premised on the use of a soft synthetic resin foam material to give cushioning properties, but generally a flexible synthetic resin foam material forms innumerable open cells in the structure by a foaming agent. (Fig. 13A) is used. These open cells have a small resistance to compression, are easily crushed, have poor durability, and have a significant change in hardness due to temperature. In addition, since the weight of the head is borne at the same location in the center of the cherry tree when used, a “spot” occurs in that portion, and as a result, the middle portion of the cherry is deformed into a concave shape and compared to both ends. As a result, the function of helping to lie down while holding the head at a predetermined height during sleep is lost, resulting in a short life of the macula.

  As described in Patent Document 5, turning over is a necessary requirement in human sleep, and human body fluids (blood, lymph fluid, joint fluid, etc.) are caused by body movements such as turning over unconsciously. Promote the flow. Therefore, when sleeping in a posture that cannot be turned over, body fluids stagnate in each part, resulting in various “cervical spine symptoms” such as stiff shoulders, pain, and poor blood circulation such as numbness of the hand.

  By accurately adjusting the height of the macula and maintaining the height for a long period of time, it is easy to turn over and it is possible to prevent or reduce the occurrence of cervical spine symptoms accordingly. However, Patent Document 1 does not describe or suggest such a configuration.

  Further, in the macula described in Patent Document 2, a necessary number of height-adjusting sheet bodies are stacked on the upper part of the makura body, and the upper part is covered with a surface clothing body that is in direct contact with the back of the head and the neck, and the end is covered with the macula. There is disclosed a macula that can be adjusted to the height of the back of the head and neck of the user by fastening it to the bottom of the main body with a surface fastener. However, there has been no suggestion of a macula or its adjustment method that makes it easy to turn over during bedtime to eliminate cervical spine symptoms.

  Further, the macula described in Patent Document 3 proposes to use a foamed polystyrene as the material while lowering the central part corresponding to the back of the head and making both sides higher than the central part. The figure also shows the case where the head is placed on the lower part of the macula and sleeping in a supine posture, and the side of the head is placed on the higher part and the center of the spine is connected to the center line of the head. It is described that the line is kept in a substantially straight line so as not to give an abnormal distortion to the back and neck. However, this macula has a low central part, and both sides are raised and formed in an uneven shape, so it is difficult to turn over with natural movement of the human body and get on the convex part from the concave part, so unconscious It is a structure that cannot be turned over.

  Further, the macula described in Patent Document 4 has a structure in which the upper surface of the macula main body is formed into a concave curved surface portion and a convex curved surface sandwiching the concave curved surface portion, and the back head and neck are fitted and supported. Is composed of a plurality of elastic plates. However, since the macula body supports the back head and the neck at the same time, it is difficult to support in the sideways posture even if it can be stabilized in the supine posture and is not suitable for turning over.

  Furthermore, in the invention described in Patent Document 5, in a state in which the user places his head on the macula and lies on the floor in a sideways posture, Select the number and combination of elastic plates so that they are almost parallel, and finely adjust the height of the macula. Teaching to fine-tune the height of the macula so that it is about 5 to 15 degrees to the floor.

  By using the macula whose height has been adjusted according to the present invention, it is possible to turn over naturally, and as a result, the intervertebral fora that constitutes the neck in the upward posture and the lateral posture is expanded and stable. Can be maintained, and thus can maintain a state without squeezing nerves in the cervical vertebra and causing cervical spine symptoms.

  In order to fully demonstrate the effect of the invention of the method of adjusting the height of the macula and to maintain the effect over a long period of time, it is necessary for the macula to maintain the original adjustment state over a long period of time, that is, the height of the macula The premise is that there will be no significant change.

  As mentioned above, as a material of the macula, conventionally, granular materials such as buckwheat husks and rice husks were often used, but thereafter, a synthetic resin foam plate was developed, and then a low resilience synthetic resin foam was developed. And this synthetic resin foam is used as an elastic material for macula because it has a feature that it can be easily formed into a curved surface according to the shape of a plate or sheet, or a predetermined surface shape, especially the back of the head or neck. It became mainstream.

  The human cervical vertebra is physiologically curved in a convex shape (physiological front bay) to maintain a stable posture that supports the weight of the head when standing. On the other hand, when lying on the futon or bed from this standing posture and placing the head on the macula, the weight of about 10% of the body weight, which is the weight of the head, is supported by the macula. .

  The use of macula causes the cervical spine state, that is, the neck and shoulder muscles to relax, and the weight acting on the neck muscles changes, resulting in a change in the cervical spine state. Therefore, it is considered that the compressive stress is generated by the weight of the head acting on the macula, and the compressive stress is relaxed and restored when the macula is not used.

  As mentioned above, it is common for a cherry to bear the weight of the head (usually about 10% of the body weight) during use. Therefore, compression stress and restoring force are alternately present before and after use inside the body of the cherry. Will act. As shown in FIG. 13 (A), the synthetic resin foam F that constitutes the cushion of the macula has innumerable “open cells f” foamed using a foaming agent inside the tissue. Has pores connected to each other, and therefore has a property of absorbing liquid as if it was a spongy body.

  On the other hand, as shown in FIG. 13B, in the case of the synthetic resin foam Fd in which many “closed cells fd” are formed, the walls of the closed cells fd are surrounded by the thin synthetic resin wall w. The elastic force is obtained depending on the relatively short wall w and the pressure of the gas contained in the closed cell fd. Furthermore, since the open cell f is formed by being surrounded by a long wall surface, the wall surface easily bends and deforms, so that it is low in elasticity and flexible, and therefore is weak against repeated loads and is subjected to the same weight. Often not suitable for.

  In the case of the closed cell fd, the wall surface has a simple wall shape as compared with the open cell f, and since it is nearly spherical, its length is short and it is closed with a short wall surface length. It is highly elastic and has the characteristics to withstand repeated loads. Therefore, by combining with other elastic members, the shape can be maintained while providing flexibility.

  In general, in the case of a macula using a plate material having a continuous foam f, as described above, the thin wall around the bubble gradually loses its increase in compressive strain and the restoring force due to the repeated generation and release of stress. The so-called “sagging phenomenon” in which the volume and shape change occurs, and as a result, the cherry tree does not maintain the initial adjusted height, and the life of the cherry tree that can maintain the optimum height is “1 to 2 years” It is said to be about. Therefore, the selection of the material, foaming method, and foaming ratio of the synthetic resin continuous foam used for the macula is extremely important.

  On the other hand, because the macula is in direct contact with the human body such as the back of the head, the side of the face, and the neck, it has sufficient elasticity, but it must be soft and soft. It becomes.

[About deformation tolerance]
In particular, as described in Patent Document 5, adjustment is required by the user of the macula, but the cervical spine does not have a predetermined shape, that is, shoulder stiffness or numbness that is influenced by the posture of the neck. In order to maintain the shape, the change in the height of the macula, that is, the change in the height that sinks further with the passage of time from the initial appropriate height when the head load is applied, that is, the “deformation tolerance” is A range of about 5 mm or less from the initial height is preferable.

  When the depression is larger than the allowable deformation range, the intervertebral foramen of the cervical vertebra in the neck on the back side becomes narrower than the appropriate range, and as a result, there is a tendency to develop cervical vertebral symptoms such as shoulder stiffness. In addition, this data has shown the result of having arranged statistically from the relationship between the example of many cervical vertebral symptoms which one of the inventors collected for many years as an orthopedic surgeon, and the height of the macula.

  FIG. 14 shows a part K of the macula P in a compressed state by the weight of the head H as a result of placing the head H on the upper surface of the soft synthetic resin foamed macula P. FIG. Although the open cell f is crushed and is depressed to a depth d, the change in the depth d over time is required to be within the allowable deformation range in order not to cause the cervical spine symptom. It is.

  Specifically, for example, in the case of a man who is 172 to 180 cm tall and has a weight of 61 to 63 kg, the normal setting value of the height of the macula is 65 to 70 mm. The “deformation tolerance” with respect to the depth d that sinks due to the weight of the head is 5 mm or less as described above.

  When this deformation tolerance is greatly exceeded, that is, when the sinking is deeper than planned, the angle formed by the axis of the head tilted forward with respect to the body axis (spine) falls below an average of 5 to 15 degrees. Become. In this state, the nerve pulled out from the cervical foramen is compressed by the edge of the cervical spine, and there is a tendency to develop symptoms such as shoulder stiffness.

[Requirements for Macura]
For the above-mentioned reasons, for the purpose of preventing the occurrence of cervical vertebral symptoms, it is possible to effectively turn over at bedtime, and the requirements of the macula that can maintain the state of the cervical spine normally while sleeping are as follows: is there.

  1) The first requirement is that the support surface should be flat as well as elastic so that it can be turned over easily. That is, when the head is placed on the cherry tree, d is maintained at about 5 to 15 mm in order to be able to turn over easily. In other words, a slightly harder cherry tree seems to be suitable for turning over.

  2) The second requirement is that there should be elasticity and flexibility (softness) that does not make the user feel uncomfortable when the head is placed. That is, as shown in FIG. 13, when the head H sinks beyond a predetermined range, the head H rises backward and compresses the nerves in the neck, so that the head H is submerged to some extent. It needs to be supported with elasticity and flexibility (it will not sink more than ordinary urethane macula).

  3) The third requirement is that it has almost the same feel and flexibility as the various types of macula currently sold. In other words, it is necessary to have a hard feeling that exceeds a predetermined range or a soft cherry that is not too soft like a low resilience foamed resin.

  4) The fourth requirement is that there is resilience and durability as a macula that maintains the above requirements for a long time. In other words, there is almost no “sagging phenomenon” in which the head gradually becomes larger with time, ie, the initial height change remains within the allowable deformation range even after long-term use. It is necessary to be a macula with.

  An object of the present invention is to provide a macula having the first to fourth requirements.

In order to achieve the above object, a macula according to the present invention is configured as follows.
1) A three-dimensional woven elastic layer in which a plurality of three-dimensional knitted elastic sheets are stacked, a main part having one or more synthetic resin independent foam elastic sheets, and one or more synthetic resin independent foams below the main part. The adjustment part having an elastic sheet constitutes the cherry, and the main part is distinguished from the adjustment part and stored in the inner bag. The adjustment part adjusts the height by the user by inserting and removing. It is characterized by being configured.

2) The members constituting the main part and the adjustment part are housed in separate bags or separate compartments (pockets) formed in a single bag.
3) It is characterized in that it is housed in the outer bag in a state in which a feeling improvement layer made of a low-resilience synthetic resin foamed elastic sheet is superimposed on the upper layer inside the bag housing the main body.

  4) The three-dimensional woven elastic sheet constituting the main body has 2 to 6 sheets, and the synthetic resin independent foamed elastic sheet has a thickness of 5 to 30 mm, particularly 5 to 10 mm. .

  5) The three-dimensional knitted elastic sheet is woven using stretched synthetic fibers, stretched semi-synthetic fibers or natural fibers, and has a predetermined gap between the front surface layer and the back surface layer. The sheet-like material is connected to each other by a connecting thread, and the sheet-like material is composed of two to six, preferably two to four, to form a three-dimensional woven elastic layer.

  6) The three-dimensional woven elastic sheet is characterized in that the elastic restoring force is strengthened by combining with the three-dimensional elastic sheet in which polyurethane is foamed in the space within a range not losing the characteristics of the woven elastic sheet. Yes.

7) At least one synthetic resin independent foamed elastic sheet constituting the adjustment layer is prepared, and the thickness of the sheet is 5 to 10 mm. The sheet is inserted and removed from the compartment of the contained inner bag. It is characterized by being possible.
(About 3D woven elastic sheet)
The macula of the present invention has a double structure composed of a main part and an adjustment part (FIGS. 1 and 6), and a three-dimensional woven elastic sheet (or mesh elastic sheet) is used as a member constituting the main part. There is a feature in the point.

  In other words, in the present invention, the elastic property of the three-dimensional woven elastic sheet, the durability with less stickiness, and the air permeability are effectively utilized, and the flexible and elastic feel of the independent foamed elastic sheet is used in combination with this. There is a feature in doing.

  As shown in FIG. 8 (FIG. 9), the three-dimensional woven elastic sheet 3 in the present invention means a woven sheet in which a surface material 100 and a lining material 101 are connected with a connecting thread 103 with a gap 102 therebetween. ing.

  The material is mainly synthetic fibers that are slightly thicker than fibers used for clothing such as polyester, nylon, and polypyropylene. However, semi-synthetic fibers such as viscose rayon and triacetate can be used depending on the case, and natural or simple fibers of cotton, wool, silk and hemp natural fibers can be used. In particular, it is preferable to form a surface material using semi-synthetic fibers or natural fibers, and the thickness is 2 mm to 10 mm, preferably 5 to 6 mm.

  This three-dimensional knitted elastic sheet 3 is a material that is three-dimensional, has many openings, is air permeable, has little compression strain due to the rigidity of the connecting yarn, and is elastically highly resilient. When this sheet is combined with another material, such as a synthetic resin independent foamed elastic body, the feel given to the user's head varies greatly depending on the position and number of the laminated layers.

  The synthetic resin independent foamed elastic body employs a synthetic resin foam that is flexible enough to be in contact with the human body, such as polyurethane and polyethylene. Especially in the case of a polyethylene foam sheet, the expansion ratio is around 30 times. It is preferable to use one having a permanent set with a relatively low compression set of around 3.1%.

  Again, the macula according to the present invention employs a three-dimensional woven elastic sheet and a synthetic resin independent foamed elastic body (sheet) as a main part, and further a foam sheet such as a urethane sheet or polyethylene under the main part. Overlapping adjustment sections are provided.

  In the handling, the "main part" that constitutes the cherry is the part handled by the makura diagnosis specialists and orthopedic surgeons who are familiar with the characteristics of the cherry, and the "adjustment part" stacked below this main part is This is the part that the user handles. Therefore, it is important that the main body has a structure that cannot be easily handled by the user, and that the user can handle only the adjusting unit.

  Since the main part is a part that directly receives the load of the head, local stress is likely to be generated, and depending on the material, the main part is easily generated. Therefore, since it is a part that requires technical adjustments such as selection of the material and thickness of the sheet to be used and the thickness of the main part, this part can be easily pulled out or added by the user. It is important not to be able to.

  The macula according to the present invention feels somewhat harder than the commonly used macula, but in order to relieve this feeling, a thin low-resilience synthetic resin foam sheet is disposed above the three-dimensional woven elastic body. Is good.

  The macula according to the present invention includes a three-dimensional woven elastic layer in which a plurality of three-dimensional woven elastic sheets (three-dimensional knitted elastic sheets or three-dimensional woven elastic sheets) are stacked, and a “main body” in which a synthetic resin independent foam elastic sheet is stacked. Part ”and an“ adjustment part ”in which a synthetic resin independent foamed elastic sheet is stacked below this main part. The main part is accommodated in a bag and closed with a chuck or a magic fastener. The user is configured to be relatively difficult to insert and remove.

On the other hand, the adjustment unit is configured so that the user can adjust the height by simply inserting and removing it so that the user can easily adjust the height of the macula when the user uses it on an actual basket or bed.
In other words, the macula according to the present invention uses a plurality of three-dimensional woven elastic sheets, and a main part in which a synthetic resin independent foam elastic sheet is appropriately stacked thereon, and one or more sheets arranged below the main part. It is a double-structured macula composed of a synthetic resin independent foamed elastic sheet.

  The main part of this macula is adjusted in orthopedics or by a person who has been specially trained to adjust the structure of the macula, and is preliminarily adjusted in consideration of changes in height due to the user's corpses and bed softness. Prepare the part and form the macula with the adjusted height.

  Then, place the adjusted macula on the bed or bed actually used by the user and use it on a trial basis. Depending on how the head rotates (turning over), etc. The thickness of the synthetic resin independent foamed elastic sheet and the number of sheets to be used are appropriately selected, and the height of the macula that matches the use state of the user is set and used.

  The macula according to the present invention is formed by combining a synthetic resin independent foamed elastic sheet and a three-dimensional woven elastic sheet, so that no settling occurs even when used for a long time. There is no change.

  Moreover, the top surface of the macula is flat at first glance, has predetermined elasticity and durability, and can stably support the head at a predetermined height according to the user by the main body part and the adjustment part. As a result, it is possible to prevent the occurrence of cervical vertebral symptoms such as stiff shoulders and numbness of the hands by allowing the head to easily rotate while sleeping on the upper surface of the macula and freely turning over.

  In addition, according to the present invention, a plurality of three-dimensional woven elastic sheets are used on the main part of the cherry and a plurality of synthetic resin independent foam elastic sheets are used. There is no large fluctuation (dent), and even if it fluctuates, it is within the allowable range of deformation that does not affect the cervical spine, and the rollover operation can be performed very easily.

(About the action of the three-dimensional woven elastic sheet)
As shown in FIG. 8, the three-dimensional knitted elastic sheet 3 is connected by a connecting thread 103 with a gap 102 between the outer fabric 100 and the lining 101, and has a small space portion in its structure and is elastic. It is a lightweight porous sheet.

  As the connecting yarn 103, a synthetic fiber monofilament such as polyester having a low waist is often used. This monofilament is stretched 3 to 4 times after being discharged from the spinneret of the spinning apparatus, and is a small-diameter Tegs or bristle-like shape, and has a considerable strength. Therefore, the three-dimensional knitted elastic sheet 3 using this has sufficient elasticity and has a kind of spring characteristic. Therefore, the laminate in which the woven elastic sheets 3 are stacked has sufficient elasticity and resilience even when compressively deformed in the thickness direction.

  The thickness of one of the three-dimensional knitted elastic sheet 3 is 2 to 10 mm, preferably about 5 to 6 mm, and the number of sheets used for the main part of the macula is about 2 to 6, Preferably, 2 to 4 sheets are used in an overlapping manner.

  However, since the three-dimensional woven elastic sheet 3 has a three-dimensional structure and has a relatively weak force against the lateral pressing force (a weak force to lay the connecting thread that stands upside down), it is deformed to slide by the lateral pressing force. However, since the sheets are easy to move and tend to shift during use, it is preferable to use these sheets integrally connected to the loose with a thread.

  That is, with only one three-dimensional woven elastic sheet 3, the deformation that can sustain the restoring force due to the weight of the head, that is, the elastic deformation cannot be given, and it feels harder than the feel of a normal macula. Yes, the softness necessary for macula is not obtained. In order to solve this problem, a plurality of sheets are stacked and used so that they can be deformed while maintaining overall elasticity.

  When the number of the three-dimensional knitted elastic sheets 3 is two, the stress that bears the weight of the head is dispersed, so that it is possible to give the necessary amount of sinking (change in thickness) and elastic force. Further, when there are three sheets, the shape is deformed according to the shape of the head, and during the deformation, there is a characteristic that a slight slip occurs between the plurality of three-dimensional woven elastic sheets 3, thereby dispersing the stress. The head can be rotated smoothly when turning over. The behavior of the laminate of such a three-dimensional woven elastic sheet 3 is important.

  The compressive deformation can be dispersed by a slight slip between the layers of the three-dimensional knitted elastic sheet 3 laminated as described above, and this function provides an elastic restoring force and supports the head placed on the macula without feeling uncomfortable. It makes the necessary elastic deformation.

  In addition, since the three-dimensional woven elastic sheet 3 is deformed so that the connecting yarn 103 shown in FIG. 8 is laid down (reference, FIGS. 11 to 12), in order to avoid this phenomenon, buffer urethane is installed on the upper part, It is also possible to apply polyurethane foam in the space of the three-dimensional woven elastic sheet.

Next, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 and 2 are perspective views showing a cutaway part of the macula according to the first embodiment, and FIG. 3 is a sectional side view of the same.

  The macula 1 according to the embodiment of the present invention is composed of a main part A which is an upper structure and an adjustment part B which is a lower structure, which have a first storage part 6a and a second storage part 6b. It is accommodated in the inner bag 6 (inner cover).

  In this embodiment, the main part A includes a plurality of urethane sheets (foams) 2a, 2b, a three-dimensional woven elastic layer 3 comprising three-dimensional woven elastic sheets 3a, 3b, 3c, a polyethylene sheet 2c and urethane. It is composed of a sheet 2d. The adjustment layer B below the main part A is composed of one or a plurality of foam sheets 4a and 4b.

  In addition, the thickness of each sheet | seat 2a, 2b, 2c in this Example used the thing of 5, 10, 5 mm, respectively. Moreover, as the three-dimensional knitted elastic sheets 3a to 3c, polyester fibers were used and woven to a thickness of 2.4 mm.

  The main body part A and the adjustment part B are accommodated in an inner bag 6, and this inner bag 6 accommodates the main part A in which the urethane sheet 2 a... And the three-dimensional woven elastic sheet 3 are laminated. The first storage section 6a and the second storage section 6b that stores the adjustment section B made of one or two foam sheets.

  The first storage portion 6a is a closing pocket that the user cannot open and close as much as possible, and the opening can be closed with a magic fastener or a chuck 6c. The second storage portion 6b is referred to as an adjuster pocket, and stores the polyethylene sheets 4a and 4b (synthetic resin independent foamed elastic sheets) so that the user can put them in and out.

  A cushion 8 having an arcuate surface that supports the rear surface of the neck is disposed in front of the main body A, and is supported by comfortably contacting the neck. In addition, the cushion 8 is not separated as described above, but the seat 2a, 2b is extended to the front of the main body A as shown in FIG. Thus, it is possible to configure the macula 1 having a good feel. Moreover, the inner bag 6 containing the main part A and the adjusting part B is covered with an outer cover 9, and this outer cover 9 can be easily attached and detached so as to be able to enjoy changes in design due to washing and replacement of the cover 9. It has become.

  The first storage portion 6a is a portion where the orthopedic surgeon or a specially educated pillow examiner or the like forms the main body A that determines the contents based on the physique and use state of the user of the macula. is there. The second storage portion 6b is also adjusted at the same time as the main portion A and is accommodated in the adjustment portion B. In this portion, one or two foam sheets 4a and 4b are taken in and out by the user himself / herself. Fine-tune the height of the macula.

  The height of the macula is adjusted based on data such as gender distinction, height and weight, physique, angle of the cervical vertebra in the upward posture using the macula, and the specific method is described in 2003-209099. The method of the invention described in the publication No. may be adopted.

  FIG. 5 shows a second embodiment. In this macula 1A, a urethane sheet 2a having a thickness of 15 mm is disposed on the uppermost layer constituting the main portion A, and a thickness of 2.4 mm is disposed below the urethane sheet 2a. A thick three-dimensional woven elastic layer 3 is formed by laminating a plurality of (three in this example) three-dimensional woven elastic sheets. And three foam sheets 4a, 4b and 4c having a thickness of 5 mm are arranged in the adjusting portion. The main portion A is housed in the inner bag 6 and the inner bag 6 and the foamed sheets 4a, 4b and 4c are housed in the outer cover 9 in a simple structure.

  The urethane sheets 2a and 2b constituting the main body A shown in FIGS. 1 and 2 give a feeling to the head, and therefore, the one having a flexible characteristic is used. As the polyethylene sheet 2c, the urethane foam 2d, and the foam sheets 4a and 4b constituting the adjustment part B, a polyethylene resin independent foam sheet can be used because the stress at the head is considerably dispersed.

  As this independent foam of polyethylene resin, for example, Furukawa Electric Co., Ltd., a foam ace foam synthetic resin plate, a foam with a foaming ratio of 30 times and a thickness of 15 mm can be used.

  In the present invention, three-dimensional woven elastic sheets that are particularly used as durable and elastic sheets include, for example, JP-A Nos. 2002-138352, 7-229039, JP-A-5-3314748, and JP-A-6- What was manufactured by the method as described in each gazette, such as 287842, can be used.

FIG. 6 is a cross-sectional side view of the macula 1B according to the third embodiment, which is a modification of the makra having the structure shown in FIG. 3, and uses flexible cushions 8 and 8a on both sides of the main part A. ing.
FIG. 9 shows an example in which a three-dimensional woven elastic sheet 30 in which small holes 20 having a diameter of 3 mm are opened on the outer surface 101 at intervals of 10 mm is employed. Ceramic balls 21 (including carbon balls) impregnated with aromatic oil are put into the small holes 20 and used. By using the oil containing aromatic oil in the inner structure of the cherry tree, there is an effect (aromatherapy effect) that the cherry tree gives off a fragrance and gives a comfortable atmosphere to the user.

Next, the operation of the three-dimensional woven elastic sheet will be described.
FIG. 10 shows a cross section of the four three-dimensional knitted elastic sheets 3a to 3d constituting the main part A and the urethane sheet in an unloaded state.

  FIG. 11 shows that the load W of the head H acts in different directions at the center and the side, and the three-dimensional woven elastic sheets 3a to 3c are slightly shifted to the left with respect to the lowermost sheet 3d. Shows the state. There is almost no lateral displacement of the upper sheet 3c with respect to the sheet 3d, then the sheet 3b is the largest, 3a is the largest, and the lateral displacement occurs.

  As shown in FIG. 12, when the load W of the head H is applied perpendicularly to the three-dimensional woven elastic sheet 3a,..., There are various connecting yarns (symbol 103 in FIG. 8) constituting the sheet. Although there is a tendency to bend into a shape, when the load W is removed from this state, the connecting thread is restored to the original straight line shape and the height of the macula is maintained at a predetermined height.

  As described above, when a plurality of three-dimensional woven elastic sheets are used in layers, a slight deviation occurs between the layers as the user's head rotates during use of the macula. At the same time, each elastic sheet bears a load while changing its shape into various shapes depending on the direction and size of the load as shown in FIGS. 10 to 12, and when this load is removed, the elastic sheet is restored to its original state. It can be done.

  FIG. 7 shows a structure of a macula having a structure in which a main part A is accommodated in an inner bag 60, an adjustment layer B made of a polyethylene sheet is disposed below the inner bag 60, and these members are accommodated in an outer cover 90. An exploded perspective view is shown.

  The main part A in this embodiment is composed of a three-dimensional woven elastic layer 31 composed of four three-dimensional woven elastic sheets, and four urethane sheets 25, 26, 27 and 28. And as the adjustment part B, two polyethylene sheets are used. The main portion A is accommodated in the inner bag 60 and closed. The main portion A is accommodated in the outer cover 90 in a state where one or two polyethylene sheets 40 (41) are disposed below the main portion A and assembled together. By doing this, it is possible to obtain a macula in which the three-dimensional woven elastic layer 31 is arranged at a portion where the head contacts.

  The three-dimensional woven elastic layer 31 has a relatively large elastic force. When the head is placed on the elastic layer 31, the user may feel a little stiff when the user is a flexible person such as a woman. In such a case, a urethane sheet is placed on the upper surface of the inner bag 60 to generate a flexible feeling.

  In addition, when it is supported by the macula from the back of the head to the neck, there may be a slight resistance to the neck, so in this case the urethane sheet that forms the upper layer of the main part is turned to the front side of the macula It is good to arrange.

It is a perspective view which cuts and shows the internal structure of the macula concerning an embodiment of the invention. It is a perspective view which shows the internal structure of the same macula. It is a sectional side view of the same macula. It is a cross-sectional view of the macula which extended the urethane sheet of the upper layer of the main-body part to the front part. It is a cross-sectional view of a macula having a main part of another type. It is a cross-sectional view of a macula having a main part of another structure. FIG. 3 is a perspective view showing an internal structure of a slightly harder cherry using a three-dimensional woven elastic layer as an upper layer of a main part. It is sectional drawing which shows the concept of a three-dimensional woven elastic sheet. It is the perspective view which expanded the three-dimensional knitted elastic sheet with a small hole. It is sectional drawing which shows the initial state which does not make the load of a three-dimensional knitted elastic sheet act. FIG. 5 is a cross-sectional view showing a state where the connecting yarns of the sheet are deformed when the weight of the head is applied to the three-dimensional knitted elastic sheet. FIG. 5 is a cross-sectional view showing a state where the connecting yarns of the sheet are deformed when the weight of the head is applied to the three-dimensional knitted elastic sheet. In the enlarged cross section of the synthetic resin foam, (A) shows open cells and (B) shows closed cells. It is a figure which shows the deformation | transformation state of the upper surface of a macula when the load of a head is made to act on a macula.

Explanation of symbols

1 Macro A A Main part B Adjustment part 2a, 2b, 2c, 2d Urethane sheet
3a, 3b, 3c Three-dimensional woven elastic sheet 3 Three-dimensional woven elastic layer 4a, 4b Urethane sheet 6 Inner bag
6a 1st storage part (closed pocket) 6b 2nd storage part (open / close pocket)
100 Outer fabric 101 Lining 102 Spacing 103 Connecting thread

Claims (7)

A main portion in a state in which a three-dimensional woven elastic layer in which a plurality of three-dimensional woven elastic sheets are stacked and a synthetic resin independent foam layer in which a plurality of synthetic resin independent foam elastic sheets are stacked;
The adjusting part having at least one synthetic resin independent foamed elastic sheet below the main part constitutes a cherry, and the main part is distinguished from the adjusting part and stored in an inner bag. The adjustment part is a macula that can be adjusted by the user so that the height can be adjusted by inserting and removing.   The height-adjustable macula according to claim 1, wherein members constituting the main part and the adjustment part are accommodated in separate bags or compartments.   2. The inner bag containing the main body portion is housed in the outer bag in a state in which a touch and impact relaxation improving layer made of a low resilience synthetic resin foamed elastic sheet is superimposed on the upper layer in the inner bag. Macula with adjustable height.   The three-dimensional knitted elastic body sheet constituting the main body has 2 to 6 sheets, and the synthetic resin independent foamed elastic sheet has a thickness of 5 to 30 mm. Macula with adjustable height.   The three-dimensional woven elastic sheet is woven using stretched synthetic fibers, stretched semi-synthetic fibers, or natural fibers, and is connected so as to have a predetermined gap between the front surface layer and the back surface layer. The height according to any one of claims 1 to 4, wherein the three-dimensional woven elastic layer is formed by stacking two to six sheets of sheet-like materials connected by yarns. Can be adjusted.   6. The elastic restoring force of the three-dimensional woven elastic sheet is enhanced by foaming polyurethane in the space of the three-dimensional woven elastic sheet as long as the characteristics of the woven elastic sheet are not lost. Macula with adjustable height. At least one synthetic resin independent foam elastic body sheet constituting the adjustment layer is prepared, the thickness of the sheet is 5 to 10 mm, and it can be inserted and removed from the contained inner bag. A macula whose height can be adjusted according to any one of claims 1 to 6.

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