EP1021115B1 - Pillow for cervical comfort - Google Patents

Pillow for cervical comfort Download PDF

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Publication number
EP1021115B1
EP1021115B1 EP98936465A EP98936465A EP1021115B1 EP 1021115 B1 EP1021115 B1 EP 1021115B1 EP 98936465 A EP98936465 A EP 98936465A EP 98936465 A EP98936465 A EP 98936465A EP 1021115 B1 EP1021115 B1 EP 1021115B1
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EP
European Patent Office
Prior art keywords
pillow
kpa
comprised
user
foam
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP98936465A
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German (de)
French (fr)
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EP1021115A1 (en
Inventor
Dominique Dervieux
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Dervieux Dominique
Original Assignee
Askle S A
ASKLE SA
Dervieux Dominique
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Publication of EP1021115A1 publication Critical patent/EP1021115A1/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A47G9/10—Pillows
    • A47G9/1081—Pillows comprising a neck support, e.g. a neck roll
    • A47G9/109—Pillows comprising a neck support, e.g. a neck roll adapted to lie on the side and in supine position
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A47G9/10—Pillows
    • A47G2009/1018—Foam pillows

Definitions

  • the present invention relates to pillows intended to the improvement of personal comfort and in particular a pillow allowing the user a position avoiding the problems of lordosis and cervical osteoarthritis.
  • Pillows are currently on the market as described for example in DE-U-29 600 637. comprising two boss portions separated by a hollow intended to place the head of the user there.
  • This guy pillow which, at first glance, seems to provide comfort personal to its user, actually presents some number of drawbacks. Indeed, the head pressed into the hollow creates painful cervical support at the level of the middle part of the cervical spine which accentuates lordosis physiological and whose consequences are important since the posterior vertebrae conjugation holes are reduced and risk pinching the roots spine.
  • this lordosis increases the pinching of the posterior articular processes of cervical vertebrae which can lead to real "beaks” osteoarthritis "of the cervical spine, which limits their movements, is painful and causes contractures and neuralgia.
  • the pillows mentioned above have support insufficient occiput which is then cantilevered and a poor adaptation of the height of the support, variable in each individual.
  • they leave without support the upper dorsal part at the place of the seventh cervical vertebra and prevent displacement of the head, especially the rotation which is blocked by a curvature molding the nape and the support of the skull.
  • these pillows are made of foam which are either too firm or too soft.
  • the lift of such foam is not suitable: it is too strong in terms of the middle cervical part and often not strong enough at level of the occiput of the skull.
  • foams with high elasticity like latex whose memory effect is very fast, to say that the return after compression is instantaneous, this which prevents optimal comfort from being felt because mini deformations of the material around a medium position are too quick to disappear.
  • the object of the invention is to provide a two-humped type pillow that doesn't have these disadvantages.
  • Another object of the invention is to provide a pillow of the above type having a shape and a consistency allowing an alignment of the cervical vertebrae of the user.
  • Yet another object of the invention is to provide a pillow of the above type which has a shape and a consistency such as to avoid the user cervical lordosis and osteoarthritis problems presented usually by conventional pillows of this type.
  • the object of the invention is therefore a pillow of the type comprising two portions in the form of bumps separated by a hollow portion, in which the first portion upstream forms a bump intended to serve as support for the head of the user and is higher than the second portion in the form of a bump intended to serve as a support for the seventh cervical vertebra.
  • At least the first shaped portion of bump consists of an elastic foam having a return time after compression of at least 5% greater than 1 second and resistance to indentation according to standard NFT 56-111 between 1.5 Kpa and 3.5 Kpa.
  • the portion hollow of the pillow has a slot allowing a share a better behavior of the material when the user rests on the two shaped portions bumps and on the other hand allows a folding of the pillow bringing the two portions on top of each other and allowing the user to sleep in lateral support.
  • the pillow according to the invention comprises a first upstream portion 10 and a second downstream portion in the form of bumps, the portion upstream 10 being higher than the downstream portion 12 when the pillow is on a horizontal surface.
  • Both bump-like portions 10 and 12 are separated by a recessed portion 14 which, in the embodiment preferred, has a slot 16.
  • the slot 16 of a preferably between about 2cm and 6cm deep, extends between the two lateral edges of the portion in hollow and ends with notches 18 and 20 which facilitate the folding of the pillow as will be seen by the after.
  • the two shaped portions of bumps serve as support on the one hand to the head of the user and secondly to the hard part of the part dorsal where the seventh cervical vertebra is located.
  • the two portions 10 and 12 Under the pressure exerted by the weight of this part of the body of the user, the two portions 10 and 12 whose outline original is shown in dotted lines in the figure are compressed and perfectly fit the body shape of the user.
  • the slot 16 has widened thus avoiding lateral tensions on the support areas.
  • Another essential characteristic of the invention is the peculiarity of the material used in the pillow according to the invention. Indeed this material must be such that it allows a lift well suited to the place of support without being too low or too high so as to obtain a sinking of the support zones as illustrated in the figure 3. In other words, it must promote the alignment of cervical vertebrae so the dorsal part corresponding to the first cervical vertebrae remains right while not being subject to pressures that could cause a feeling of pain. It should be noted that, as previously mentioned, slot 16, in widening when the user's head rests on the pillow, allows the material not subjected to tensions side better to crush in places serving as support and thus not to modify the bearing capacity of the material.
  • the material constituting the pillow must have a memory effect with slow return.
  • the material of elastic consistency should return to its normal shape after being deformed, only after a certain delay and not not instantly like a foam like latex.
  • This slow-return memory effect helps maintain ideal comfort despite the small deformations of the pillow due to the user's movements during his sleep.
  • This comfort is mainly due to the fact that the slow return foam, on the one hand distributes the pressures and, on the other hand, keeps a memory of shapes for a certain period of time which allows a freedom of small movements while promoting the maintenance of the head in the same position during sleep.
  • the two places where the pressure is strongest are the support zones 22 and 24 (see Figure 2) of the head and the seventh vertebra cervical. Therefore, the middle part corresponding to the cervical vertebrae undergoes no pressure. To achieve this result, it is therefore necessary that the gap between the tops of the two portions that will serve of support points corresponds to the distance separating the top of the occiput of the seventh cervical vertebra.
  • the distance between the vertices of the two bumps must be adapted to the user's size or age, and must preferably be between 18 and 22cm, and preferably equal to 20cm, ideal for the user to make a custom pillow.
  • the material constituting the pillow and having to respond to the criteria mentioned above is preferably a visco-elastic open cell foam such as polyurethane foam.
  • This foam can be obtained by the reaction of a polyol and an isocyanate.
  • the foam is normally characterized by an index which corresponds to respective percentages of polyol and isocyanate used. So, if the foam is obtained from 100g of polyol and 45g of isocyanate (which corresponds to the ratio stoichiometric), the index is 100. If, instead of 45g isocyanate per 100g of polyol, only 60% of the 45g, or 27g of isocyanate, the foam index of polyurethane obtained is 60.
  • this resistance to the indentation should be between approximately 1.5 Kpa and 3.5 Kpa, which corresponds to an index between 60 and 70.
  • the index of the foam used also determines the memory effect or the return time after compression.
  • the return time after compression is becoming longer as a function of the compression ratio as illustrated in diagram of FIG. 4 which gives the value of the time of return (in seconds) depending on the compression ratio for an index of around 65. Note that for a 5% compression the return time is already 17s.
  • a foam has a slow return if its return time after compression of at least 5% is greater than 1 second.
  • Another embodiment of the invention then consists in using different foam indices for the two bumps of the pillow, and therefore different resistance to indentation.
  • the bump 10 upstream that is to say the highest (corresponding to the head of the user) made of a foam having a resistance to indentation greater than the dent resistance of the foam filling the bump 12 downstream, i.e. the lower (corresponding to the 7th cervical vertebra of the user).
  • This embodiment provides flexible support for the upper shoulders and the seventh cervical vertebra while the head support (occiput) is higher and harder because of the greater resistance to indentation. This added to the absence of foam between the two bumps (recessed portion 14) allows the cervical spine to align naturally with the weight of the neck and reduce the physiological curvature.
  • index Ri Bump downstream between 60 and 65 between 1.5 Kpa and 2.5 Kpa
  • Upstream hump between 65 and 70 between 2.5 Kpa and 3.5 Kpa
  • a pillow with two portions corresponding to upstream and downstream bumps consist of foam having different indices (or resistance to indentation), illustrated in Figure 6, is made using a mold whose inner wall corresponds to the shape of the pillow. This mold thus has two recesses corresponding to the two bumps 10 and 12 separated by the slot 16. The adequate proportions of the two constituents, polyol and isocyanate, are mixed in each hollow of the mold. The reaction results in an upward expansion of the mold, which causes a juxtaposition of the two portions of foam on line 17 shown in dotted lines on the Fig.
  • the slot 16 of the pillow according to the invention can also be used to facilitate folding of the pillow. It is indeed possible as the figure 7, to fold the pillow while passing the portion downstream 12 under the upstream portion 10 by folding the pillow the location of slot 16 which then becomes an edge outside after folding, this folding being facilitated by the two side notches 18 and 20.
  • This arrangement of the pillow allows the user to have his head 32 in high position and therefore allows him to sleep with his head turned to the side, i.e. in the supine position lateral.
  • the pillow according to the invention can be wrapped in a pillowcase provided that it does not change the properties due to the shape of the pillow and the consistency of the material composing it.
  • the cover 38 which surrounds the pillow then has a portion 40 covering the upstream pillow portion 10 and a portion 42 covering the downstream portion 12 containing aerated polyester fibers and therefore of a certain thickness. Parts 40 and 42 being softer than the two bumps that are in below, contact is more pleasant for the user.
  • the two upper and lower fabric layers surrounding the polyester fibers forming a kind of cover.
  • the intermediate part 44 covering the slot 16 does not does not contain polyester so as not to prevent the slot from play its role as mentioned earlier.
  • the pillow is in two parts separated. Only the upstream portion 50 is made of polyurethane having the properties defined above, then that the second part of the pillow forms a sort of polyester fiber pillowcase, part 52 of which covers the portion 50 as in the case of FIG. 5 and the rest forms a lower downstream portion 54. The portion 50 is found as in a tunnel in part 54.
  • the pillow according to the invention allows to obtain support from the occipital part of the skull the user as well as a support of the seventh vertebra cervical spine perfectly optimized thanks to a material having adequate lift and slow return memory effect, to align the cervical spine, to open the posterior conjugation of the vertebrae, and thus facilitate the exit of the spinal roots, which limits the pinching of the articular processes of the vertebrae cervical and ensures prevention of the formation of arthrotic beaks of the spine.

Abstract

The invention concerns a pillow comprising two portions in the shape of two humps separated by a hollow portion (14), wherein the first portion (10) upstream forms a hump designed to serve as support for the user's head and is higher than the second portion (12) in the shape of a hump designed to serve as support for the seventh cervical vertebra. At least the first portion in the shape of a hump is made up of an elastic foam with slow recovery of its shape after compression of at least 5 % longer than 1 second and a resistance to indentation according to the NFT 56-111 standard between 1.5 Kpa and 3.5 Kpa. Furthermore, the hollow portion (14) is provided with a slit extending between the two side edges and designed to prevent the lateral tension on the hump-shaped portions (10, 12) support zones.

Description

Domaine techniqueTechnical area

La présente invention concerne les oreillers destinés à l'amélioration du confort personnel et en particulier un oreiller permettant à l'utilisateur une position évitant les problèmes de lordose et d'arthrose cervicale.The present invention relates to pillows intended to the improvement of personal comfort and in particular a pillow allowing the user a position avoiding the problems of lordosis and cervical osteoarthritis.

Etat de la techniqueState of the art

Il existe actuellement dans le commerce des oreillers tel que décrit par exemple dans DE-U-29 600 637. comportant deux portions formant bosses séparées par un creux destiné à y placer la tête de l'utilisateur. Ce type d'oreiller qui, à première vue, semble apporter un confort personnel à son utilisateur, présente en réalité un certain nombre d'inconvénients. En effet, la tête enfoncée dans le creux crée un appui cervical douloureux au niveau de la partie moyenne du rachis cervical qui accentue la lordose physiologique et dont les conséquences sont importantes puisque les trous de conjugaison postérieurs des vertèbres sont réduits et risquent de pincer la sortie des racines rachidiennes. Durant la nuit, cette lordose augmente le pincement des apophyses articulaires postérieures des vertèbres cervicales pouvant amener de véritables "becs arthrosiques" de la colonne cervicale, ce qui en limite les mouvements, est douloureux et entraíne des contractures et des névralgies.Pillows are currently on the market as described for example in DE-U-29 600 637. comprising two boss portions separated by a hollow intended to place the head of the user there. This guy pillow which, at first glance, seems to provide comfort personal to its user, actually presents some number of drawbacks. Indeed, the head pressed into the hollow creates painful cervical support at the level of the middle part of the cervical spine which accentuates lordosis physiological and whose consequences are important since the posterior vertebrae conjugation holes are reduced and risk pinching the roots spine. During the night, this lordosis increases the pinching of the posterior articular processes of cervical vertebrae which can lead to real "beaks" osteoarthritis "of the cervical spine, which limits their movements, is painful and causes contractures and neuralgia.

Les oreillers mentionnés ci-dessus présentent un appui insuffisant de l'occiput qui se trouve alors en porte-à-faux et une mauvaise adaptation de la hauteur de l'appui, variable chez chaque individu. En outre, ils laissent sans appui la partie dorsale haute à l'endroit de la septième vertèbre cervicale et empêchent tout déplacement de la tête, en particulier la rotation qui est bloquée par une incurvation moulant la nuque et l'appui du crâne. The pillows mentioned above have support insufficient occiput which is then cantilevered and a poor adaptation of the height of the support, variable in each individual. In addition, they leave without support the upper dorsal part at the place of the seventh cervical vertebra and prevent displacement of the head, especially the rotation which is blocked by a curvature molding the nape and the support of the skull.

En outre, un inconvénient majeur de ces oreillers réside dans le fait qu'ils sont constitués de mousses qui sont ou trop fermes ou trop molles. La portance de telles mousses est mal adaptée : elle est trop forte au niveau de la partie moyenne cervicale et souvent pas assez forte au niveau de l'occiput du crâne. En plus, on utilise principalement des mousses présentant une grande élasticité comme le latex, dont l'effet mémoire est très rapide c'est à dire que le retour après compression est instantané, ce qui empêche de ressentir un confort optimal du fait que les mini-déformations du matériau autour d'une position moyenne sont trop rapides à disparaítre.In addition, a major drawback of these pillows is that they are made of foam which are either too firm or too soft. The lift of such foam is not suitable: it is too strong in terms of the middle cervical part and often not strong enough at level of the occiput of the skull. In addition, we use mainly foams with high elasticity like latex, whose memory effect is very fast, to say that the return after compression is instantaneous, this which prevents optimal comfort from being felt because mini deformations of the material around a medium position are too quick to disappear.

Exposé de l'inventionStatement of the invention

C'est pourquoi le but de l'invention est de fournir un oreiller du type à deux bosses qui ne présente pas ces inconvénients.This is why the object of the invention is to provide a two-humped type pillow that doesn't have these disadvantages.

Un autre but de l'invention est de fournir un oreiller du type ci-dessus ayant une forme et une consistance permettant un alignement des vertèbres cervicales de l'utilisateur.Another object of the invention is to provide a pillow of the above type having a shape and a consistency allowing an alignment of the cervical vertebrae of the user.

Encore un autre but de l'invention est de fournir un oreiller du type ci-dessus qui présente une forme et une consistance telles qu'elles évitent à l'utilisateur les problèmes de lordose et d'arthrose cervicale présentés généralement par les oreillers classiques de ce type.Yet another object of the invention is to provide a pillow of the above type which has a shape and a consistency such as to avoid the user cervical lordosis and osteoarthritis problems presented usually by conventional pillows of this type.

L'objet de l'invention est donc un oreiller du type comportant deux portions en forme de bosses séparées par une portion en creux, dans lequel la première portion en amont forme une bosse destinée à servir d'appui à la tête de l'utilisateur et est plus élevée que la seconde portion en forme de bosse destinée à servir d'appui à la septième vertèbre cervicale. Au moins la première portion en forme de bosse est constituée d'une mousse élastique présentant un temps de retour après une compression d'au moins 5% supérieur à 1 seconde et une résistance à l'indentation selon la norme NFT 56-111 comprise entre 1,5 Kpa et 3,5 Kpa.The object of the invention is therefore a pillow of the type comprising two portions in the form of bumps separated by a hollow portion, in which the first portion upstream forms a bump intended to serve as support for the head of the user and is higher than the second portion in the form of a bump intended to serve as a support for the seventh cervical vertebra. At least the first shaped portion of bump consists of an elastic foam having a return time after compression of at least 5% greater than 1 second and resistance to indentation according to standard NFT 56-111 between 1.5 Kpa and 3.5 Kpa.

Selon une caractéristique de l'invention, la portion en creux de l'oreiller comporte une fente permettant d'une part un meilleur comportement du matériau lorsque l'utilisateur prend appui sur les deux portions en forme de bosses et d'autre part permet un pliage de l'oreiller amenant les deux portions l'une sur l'autre et permettant à l'utilisateur de dormir en appui latéral.According to a characteristic of the invention, the portion hollow of the pillow has a slot allowing a share a better behavior of the material when the user rests on the two shaped portions bumps and on the other hand allows a folding of the pillow bringing the two portions on top of each other and allowing the user to sleep in lateral support.

Description brève des figuresBrief description of the figures

Les buts, objets et caractéristiques de l'invention ressortiront plus clairement à la lecture de la description qui suit en référence aux dessins dans lesquels :

  • la figure 1 représente une coupe longitudinale de l'oreiller selon l'invention,
  • la figure 2 est une vue de dessus de l'oreiller selon l'invention montrant les portions servant d'appui à l'utilisateur ainsi que la déformation, lors de l'utilisation, de la fente se trouvant dans le creux de l'oreiller,
  • la figure 3 représente une coupe de la tête de l'utilisateur reposant sur un oreiller selon l'invention montrant la déformation des portions servant d'appui,
  • la figure 4 est un diagramme représentant le temps de retour après compression de la mousse utilisée dans l'oreiller selon l'invention en fonction du taux de compression avant relâchement,
  • la figure 5 est un diagramme représentant la courbe du temps de retour après compression en fonction de l'indice de la mousse pour un taux de compression donné,
  • la figure 6 représente une coupe longitudinale d'un mode de réalisation préféré de l'invention,
  • la figure 7 représente une coupe de l'oreiller selon l'invention lorsqu'il a été plié de manière à être utilisé lorsque l'utilisateur est en appui latéral.
  • la figure 8 représente l'oreiller selon l'invention disposé dans une taie dont les parties recouvrant les portions en forme de bosse contiennent des fibres de polyester, et
  • la figure 9 est une représentation d'un mode de réalisation particulier d'un oreiller en deux parties dont la portion amont est incluse dans une partie constituée de fibres polyester.
    • The aims, objects and characteristics of the invention will emerge more clearly on reading the description which follows with reference to the drawings in which:
  • FIG. 1 represents a longitudinal section of the pillow according to the invention,
  • Figure 2 is a top view of the pillow according to the invention showing the portions serving as support for the user as well as the deformation, during use, of the slot located in the hollow of the pillow ,
  • FIG. 3 represents a section of the head of the user resting on a pillow according to the invention showing the deformation of the portions serving as support,
  • FIG. 4 is a diagram representing the return time after compression of the foam used in the pillow according to the invention as a function of the compression ratio before release,
  • FIG. 5 is a diagram representing the curve of the return time after compression as a function of the index of the foam for a given compression rate,
  • FIG. 6 represents a longitudinal section of a preferred embodiment of the invention,
  • FIG. 7 represents a section of the pillow according to the invention when it has been folded so as to be used when the user is in lateral support.
  • FIG. 8 represents the pillow according to the invention placed in a pillowcase the parts of which covering the hump-shaped portions contain polyester fibers, and
  • Figure 9 is a representation of a particular embodiment of a two-part pillow whose upstream portion is included in a part made of polyester fibers.

    • Description détaillée de l'inventionDetailed description of the invention

    Comme illustré sur les figures 1 et 2, l'oreiller selon l'invention comprend une première portion amont 10 et une seconde portion aval en forme de bosses, la portion amont 10 étant plus élevée que la portion aval 12 lorsque l'oreiller est sur une surface horizontale. Les deux portions en forme de bosses 10 et 12 sont séparées par une portion en creux 14 qui, dans le mode de réalisation préféré, comporte une fente 16.As illustrated in Figures 1 and 2, the pillow according to the invention comprises a first upstream portion 10 and a second downstream portion in the form of bumps, the portion upstream 10 being higher than the downstream portion 12 when the pillow is on a horizontal surface. Both bump-like portions 10 and 12 are separated by a recessed portion 14 which, in the embodiment preferred, has a slot 16.

    Comme on le voit sur la figure 2, la fente 16 d'une profondeur comprise de préférence entre environ 2cm et 6cm, s'étend entre les deux bords latéraux de la portion en creux et se termine par des échancrures 18 et 20 qui facilitent le pliage de l'oreiller comme on le verra par la suite.As seen in Figure 2, the slot 16 of a preferably between about 2cm and 6cm deep, extends between the two lateral edges of the portion in hollow and ends with notches 18 and 20 which facilitate the folding of the pillow as will be seen by the after.

    Lorsque l'utilisateur repose sur l'oreiller, sa tête s'appuie sur la portion amont 10 à l'endroit de la zone 22 représentée en pointillés et ses premières vertèbres dorsales ainsi que les épaules s'appuient sur la portion 12 à l'endroit de la zone 24 représentée en pointillés. A cause des pressions exercées par les parties du corps en appui sur l'oreiller, la fente 16 s'est élargie selon le contour en pointillés 26 de sorte qu'il n'existe aucune force latérale exercée sur les zones d'appui 22 et 24 susceptible de diminuer le confort de l'utilisateur comme c'est le cas d'un oreiller à deux bosses de la technique antérieure.When the user rests on the pillow, his head leans on the upstream portion 10 at the location of zone 22 shown in dotted lines and its first vertebrae dorsal as well as the shoulders rest on the portion 12 at the location of the zone 24 shown in dotted lines. AT because of the pressures exerted by body parts in support on the pillow, the slot 16 has widened according to the dotted outline 26 so there is no lateral force exerted on the support zones 22 and 24 likely to decrease user comfort as this is the case with a pillow with two technical bumps earlier.

    Une des caractéristiques essentielles de l'oreiller selon l'invention est que les deux portions en forme de bosses servent d'appui d'une part à la tête de l'utilisateur et d'autre part à la partie dure de la partie dorsale où se trouve la septième vertèbre cervicale. Ceci est illustré sur la figure 3 montrant l'occiput de l'utilisateur en appui sur la portion amont de l'oreiller, et la partie dure correspondant à la septième vertèbre cervicale 30 en appui sur la portion aval 12. Sous la pression exercée par le poids de cette partie du corps de l'utilisateur, les deux portions 10 et 12 dont le contour d'origine est montré en pointillés sur la figure sont comprimées et épousent parfaitement la forme du corps de l'utilisateur. Comme on l'a déjà mentionné, la fente 16 s'est élargie évitant ainsi les tensions latérales sur les zones servant d'appui.One of the essential characteristics of the pillow according to the invention is that the two shaped portions of bumps serve as support on the one hand to the head of the user and secondly to the hard part of the part dorsal where the seventh cervical vertebra is located. This is illustrated in Figure 3 showing the occiput of the user pressing on the upstream portion of the pillow, and the hard part corresponding to the seventh vertebra cervical 30 resting on the downstream portion 12. Under the pressure exerted by the weight of this part of the body of the user, the two portions 10 and 12 whose outline original is shown in dotted lines in the figure are compressed and perfectly fit the body shape of the user. As already mentioned, the slot 16 has widened thus avoiding lateral tensions on the support areas.

    Une autre caractéristique essentielle de l'invention est la particularité du matériau utilisé dans l'oreiller selon l'invention. En effet ce matériau doit être tel qu'il permette une portance bien adaptée à l'endroit des appuis sans être trop faible ni trop élevée de façon à obtenir un enfoncement des zones d'appui tel qu'illustré sur la figure 3. En d'autres termes, il doit favoriser l'alignement des vertèbres cervicales de sorte que la partie dorsale correspondant aux premières vertèbres cervicales reste droite tout en n'étant pas soumise à des pressions pouvant entraíner une sensation de douleur. On doit noter que, comme il a été mentionné précédemment, la fente 16, en s'élargissant lorsque la tête de l'utilisateur repose sur l'oreiller, permet au matériau non soumis à des tensions latérales de mieux s'écraser aux endroits servant d'appui et ainsi de ne pas modifier la portance du matériau. En outre, le matériau constituant l'oreiller doit présenter un effet mémoire à retour lent. En d'autres mots, le matériau de consistance élastique doit revenir à sa forme normale après avoir été déformé, qu'après un certain retard et non pas instantanément comme le ferait une mousse du type latex. Cet effet mémoire à retour lent permet de maintenir un confort idéal malgré les petites déformations de l'oreiller dues aux mouvements de l'utilisateur pendant son sommeil. Ce confort est principalement dû au fait que la mousse à retour lent, d'une part répartit mieux les pressions et, d'autre part garde une mémoire des formes durant un certain temps ce qui permet une liberté de petits mouvements tout en favorisant le maintien de la tête dans la même position durant le sommeil.Another essential characteristic of the invention is the peculiarity of the material used in the pillow according to the invention. Indeed this material must be such that it allows a lift well suited to the place of support without being too low or too high so as to obtain a sinking of the support zones as illustrated in the figure 3. In other words, it must promote the alignment of cervical vertebrae so the dorsal part corresponding to the first cervical vertebrae remains right while not being subject to pressures that could cause a feeling of pain. It should be noted that, as previously mentioned, slot 16, in widening when the user's head rests on the pillow, allows the material not subjected to tensions side better to crush in places serving as support and thus not to modify the bearing capacity of the material. In in addition, the material constituting the pillow must have a memory effect with slow return. In other words, the material of elastic consistency should return to its normal shape after being deformed, only after a certain delay and not not instantly like a foam like latex. This slow-return memory effect helps maintain ideal comfort despite the small deformations of the pillow due to the user's movements during his sleep. This comfort is mainly due to the fact that the slow return foam, on the one hand distributes the pressures and, on the other hand, keeps a memory of shapes for a certain period of time which allows a freedom of small movements while promoting the maintenance of the head in the same position during sleep.

    Comme on le voit sur la figure 3, les deux endroits où la pression est la plus forte sont les zones d'appui 22 et 24 (voir figure 2) de la tête et de la septième vertèbre cervicale. Par conséquent, la partie intermédiaire correspondant aux vertèbres cervicales ne subit aucune pression. Pour aboutir à ce résultat, il faut donc que l'écart entre les sommets des deux portions qui vont servir de points d'appui corresponde à la distance séparant le sommet de l'occiput de la septième vertèbre cervicale. La distance entre les sommets des deux bosses doit être adaptée à la taille de l'utilisateur ou à son âge, et doit être de préférence comprise entre 18 et 22cm, et de préférence égale à 20cm , l'idéal étant pour l'utilisateur de faire un oreiller sur mesure.As seen in Figure 3, the two places where the pressure is strongest are the support zones 22 and 24 (see Figure 2) of the head and the seventh vertebra cervical. Therefore, the middle part corresponding to the cervical vertebrae undergoes no pressure. To achieve this result, it is therefore necessary that the gap between the tops of the two portions that will serve of support points corresponds to the distance separating the top of the occiput of the seventh cervical vertebra. The distance between the vertices of the two bumps must be adapted to the user's size or age, and must preferably be between 18 and 22cm, and preferably equal to 20cm, ideal for the user to make a custom pillow.

    Le matériau constituant l'oreiller et devant répondre aux critères mentionnés ci-dessus est de préférence une mousse visco-élastique à cellules ouvertes telle qu'une mousse de polyuréthane. Cette mousse peut être obtenue par la réaction d'un polyol et d'un isocyanate. La mousse est normalement caractérisée par un indice qui correspond aux pourcentages respectifs de polyol et d'isocyanate utilisés. Ainsi, si la mousse est obtenue à partir de 100g de polyol et de 45g d'isocyanate (ce qui correspond au rapport stoechiométrique), l'indice est de 100. Si, au lieu de 45g d'isocyanate pour 100g de polyol, on met seulement 60% des 45g, soit 27g d'isocyanate, l'indice de la mousse de polyuréthane obtenue est de 60.The material constituting the pillow and having to respond to the criteria mentioned above is preferably a visco-elastic open cell foam such as polyurethane foam. This foam can be obtained by the reaction of a polyol and an isocyanate. The foam is normally characterized by an index which corresponds to respective percentages of polyol and isocyanate used. So, if the foam is obtained from 100g of polyol and 45g of isocyanate (which corresponds to the ratio stoichiometric), the index is 100. If, instead of 45g isocyanate per 100g of polyol, only 60% of the 45g, or 27g of isocyanate, the foam index of polyurethane obtained is 60.

    L'indice mentionné ci-dessus joue un rôle important dans le cadre de l'invention. En effet, selon la norme NFT 56-111, on caractérise les mousses de polyuréthane (ou matériau équivalent) par sa résistance à l'indentation : Ri (Kpa) = F40%/ S indentation exprimée en Kpascals et étant le rapport entre la fore F qu'il faut exercer sur une surface d'indentation S pour arriver à un taux de compression de 40%.The index mentioned above plays an important role in the context of the invention. Indeed, according to standard NFT 56-111, polyurethane foams (or equivalent material) are characterized by its resistance to indentation: Ri (Kpa) = F 40% / S indentation expressed in Kpascals and being the ratio between the drill F which must be exerted on an indentation surface S to arrive at a compression rate of 40%.

    De façon à obtenir une mousse adéquate répondant aux critères de confort énoncés ci-dessus, cette résistance à l'indentation doit être comprise entre environ 1,5 Kpa et 3,5 Kpa, ce qui correspond à un indice compris entre 60 et 70.In order to obtain an adequate foam meeting the comfort criteria stated above, this resistance to the indentation should be between approximately 1.5 Kpa and 3.5 Kpa, which corresponds to an index between 60 and 70.

    L'indice de la mousse utilisée détermine également l'effet mémoire ou encore le temps de retour après compression. De façon générale, pour un indice donné, le temps de retour après compression est de plus en plus long en fonction du taux de compression comme l'illustre le diagramme de la figure 4 qui donne la valeur du temps de retour (en secondes) en fonction du taux de compression pour un indice d'environ 65. On notera que pour une compression de 5% le temps de retour est déjà de 17s. On peut d'ailleurs estimer qu'une mousse est à retour lent si son temps de retour après une compression d'au moins 5% est supérieur à 1 seconde.The index of the foam used also determines the memory effect or the return time after compression. Generally, for a given index, the return time after compression is becoming longer as a function of the compression ratio as illustrated in diagram of FIG. 4 which gives the value of the time of return (in seconds) depending on the compression ratio for an index of around 65. Note that for a 5% compression the return time is already 17s. We may also consider that a foam has a slow return if its return time after compression of at least 5% is greater than 1 second.

    En outre, plus l'indice caractérisant le rapport en poids entre le polyol et l'isocyanate est élevé, plus le temps de retour après compression est faible. Furthermore, the higher the index characterizing the weight between the polyol and the isocyanate, the higher the return time after compression is low.

    Ainsi, comme illustré sur la figure 5, le retour après compression est quasi instantané pour un indice de 100 (inférieur à 1 seconde), mais est de 58 secondes pour un indice d'environ 65% après une compression de 50%. On doit noter que la courbe de la figure 4 serait confondue avec l'axe des abscisses pour un indice de 100 (retour instantané) .So, as illustrated in Figure 5, the return after compression is almost instantaneous for an index of 100 (less than 1 second), but is 58 seconds for an index of around 65% after compression of 50%. We should note that the curve of figure 4 would be confused with the x-axis for an index of 100 (back instantaneous) .

    Un autre mode de réalisation de l'invention consiste alors à utiliser des indices de mousse différents pour les deux bosses de l'oreiller, et donc des résistances à l'indentation différentes. Dans une telle éventualité, il est judicieux d'avoir la bosse 10 en amont, c'est à dire la plus élevée (correspondant à la tête de l'utilisateur) constituée d'une mousse ayant une résistance à l'indentation supérieure à la résistance à l'indentation de la mousse remplissant la bosse 12 en aval, c'est à dire la moins élevée (correspondant à la 7ème vertèbre cervicale de l'utilisateur). Ce mode de réalisation permet d'obtenir un appui souple pour le haut des épaules et la septième vertèbre cervicale tandis que l'appui de la tête (occiput) est plus élevé et plus dur à cause de la résistance à l'indentation plus importante. Ceci ajouté à l'absence de mousse entre les deux bosses (portion en creux 14) permet à la colonne cervicale de s'aligner naturellement par le poids du cou et de réduire la courbure physiologique.Another embodiment of the invention then consists in using different foam indices for the two bumps of the pillow, and therefore different resistance to indentation. In such a case, it is wise to have the bump 10 upstream, that is to say the highest (corresponding to the head of the user) made of a foam having a resistance to indentation greater than the dent resistance of the foam filling the bump 12 downstream, i.e. the lower (corresponding to the 7th cervical vertebra of the user). This embodiment provides flexible support for the upper shoulders and the seventh cervical vertebra while the head support (occiput) is higher and harder because of the greater resistance to indentation. This added to the absence of foam between the two bumps (recessed portion 14) allows the cervical spine to align naturally with the weight of the neck and reduce the physiological curvature.

    De préférence, les valeurs d'indice et de résistance à l'indentation sont les suivantes : indice Ri Bosse aval entre 60 et 65 entre 1,5 Kpa et 2,5 Kpa Bosse amont entre 65 et 70 entre 2,5 Kpa et 3,5 Kpa Preferably, the values of index and resistance to indentation are the following: index Ri Bump downstream between 60 and 65 between 1.5 Kpa and 2.5 Kpa Upstream hump between 65 and 70 between 2.5 Kpa and 3.5 Kpa

    Un oreiller dont les deux portions correspondant aux bosses amont et aval sont constituées de mousse ayant des indices (ou des résistances à l'indentation) différents, illustré sur la figure 6, est fabriqué à l'aide d'un moule dont la paroi intérieure correspond à la forme de l'oreiller. Ce moule comporte ainsi deux creux correspondant aux deux bosses 10 et 12 séparées par la fente 16. Les proportions adéquates des deux constituants, polyol et isocyanate, sont mélangées dans chaque creux du moule. La réaction entraíne une expansion vers le haut du moule, ce qui provoque une juxtaposition des deux portions de mousse sur la ligne 17 représentée en pointillés sur la figure.A pillow with two portions corresponding to upstream and downstream bumps consist of foam having different indices (or resistance to indentation), illustrated in Figure 6, is made using a mold whose inner wall corresponds to the shape of the pillow. This mold thus has two recesses corresponding to the two bumps 10 and 12 separated by the slot 16. The adequate proportions of the two constituents, polyol and isocyanate, are mixed in each hollow of the mold. The reaction results in an upward expansion of the mold, which causes a juxtaposition of the two portions of foam on line 17 shown in dotted lines on the Fig.

    La fente 16 de l'oreiller selon l'invention peut également être utilisée pour faciliter le pliage de l'oreiller. Il est en effet possible comme le montre la figure 7, de plier l'oreiller en faisant passer la portion aval 12 sous la portion amont 10 par pliage de l'oreiller à l'endroit de la fente 16 qui devient alors un bord extérieur après pliage, ce pliage étant facilité par les deux échancrures latérales 18 et 20. Cette disposition de l'oreiller permet à l'utilisateur d'avoir sa tête 32 en position élevée et donc lui permet de dormir avec la tête tournée sur le côté c'est à dire en position décubitus latéral.The slot 16 of the pillow according to the invention can also be used to facilitate folding of the pillow. It is indeed possible as the figure 7, to fold the pillow while passing the portion downstream 12 under the upstream portion 10 by folding the pillow the location of slot 16 which then becomes an edge outside after folding, this folding being facilitated by the two side notches 18 and 20. This arrangement of the pillow allows the user to have his head 32 in high position and therefore allows him to sleep with his head turned to the side, i.e. in the supine position lateral.

    L'oreiller selon l'invention peut être enveloppé dans une taie à condition que celle-ci ne modifie pas les propriétés dues à la forme de l'oreiller ainsi qu'à la consistance du matériau le composant.The pillow according to the invention can be wrapped in a pillowcase provided that it does not change the properties due to the shape of the pillow and the consistency of the material composing it.

    Il est cependant possible de prévoir une taie renforcée comme illustré sur la figure 8. La taie 38 qui entoure l'oreiller comporte alors une partie 40 recouvrant la portion d'oreiller amont 10 et une partie 42 recouvrant la portion aval 12 contenant des fibres aérées de polyester et donc d'une certaine épaisseur. Les parties 40 et 42 étant plus molles que les deux bosses qui se trouvent en dessous, le contact est plus agréable pour l'utilisateur. Les deux couches inférieure et supérieure en tissu entourant les fibres polyester formant une sorte de housse. La partie intermédiaire 44 recouvrant la fente 16 ne comporte pas de polyester pour ne pas empêcher la fente de jouer son rôle comme mentionné précédemment.It is however possible to provide a pillowcase reinforced as illustrated in FIG. 8. The cover 38 which surrounds the pillow then has a portion 40 covering the upstream pillow portion 10 and a portion 42 covering the downstream portion 12 containing aerated polyester fibers and therefore of a certain thickness. Parts 40 and 42 being softer than the two bumps that are in below, contact is more pleasant for the user. The two upper and lower fabric layers surrounding the polyester fibers forming a kind of cover. The intermediate part 44 covering the slot 16 does not does not contain polyester so as not to prevent the slot from play its role as mentioned earlier.

    Enfin, dans un mode de réalisation particulier illustré sur la figure 9, l'oreiller est en deux parties séparées. Seule la portion amont 50 est en mousse de polyuréthane ayant les propriétés définies ci-dessus, alors que la deuxième partie de l'oreiller forme une sorte de taie en fibres de polyester dont une partie 52 recouvre la portion 50 comme dans le cas de la figure 5 et le reste forme une portion aval 54 moins élevée. La portion 50 se trouve comme dans un tunnel dans la partie 54.Finally, in a particular embodiment illustrated in figure 9, the pillow is in two parts separated. Only the upstream portion 50 is made of polyurethane having the properties defined above, then that the second part of the pillow forms a sort of polyester fiber pillowcase, part 52 of which covers the portion 50 as in the case of FIG. 5 and the rest forms a lower downstream portion 54. The portion 50 is found as in a tunnel in part 54.

    En résumé, l'oreiller selon l'invention permet d'obtenir des appuis de la partie occipitale du crâne de l'utilisateur ainsi qu'un appui de la septième vertèbre cervicale parfaitement optimisés grâce à un matériau ayant une portance adéquate et un effet mémoire à retour lent, de façon à aligner le rachis cervical, à ouvrir les trous de conjugaison postérieurs des vertèbres, et à faciliter ainsi la sortie des racines rachidiennes, ce qui limite le pincement des apophyses articulaires des vertèbres cervicales et assure une prévention de la formation des becs arthrosiques de la colonne vertébrale.In summary, the pillow according to the invention allows to obtain support from the occipital part of the skull the user as well as a support of the seventh vertebra cervical spine perfectly optimized thanks to a material having adequate lift and slow return memory effect, to align the cervical spine, to open the posterior conjugation of the vertebrae, and thus facilitate the exit of the spinal roots, which limits the pinching of the articular processes of the vertebrae cervical and ensures prevention of the formation of arthrotic beaks of the spine.

    Claims (10)

    1. Pillow of type comprising two bump shaped portions with separated by a hollow portion (14), the first portion (10) uphill forming a bump for the user's head (28) support and being higher than the second bump shaped portion (12) for the support of the seventh cervical vertebra, characterized in that at least the said first bump shaped portion is made of an elastic foam presenting a return time of at least 5% higher than 1 second and a resistance to indentation according to Norm NFT 56-111 comprised between 1,5 KPa and 3,5 KPa.
    2. The pillow according to claim 1, wherein the distance between the top of the said first (10) and second (12) bump shaped portions is comprised between 15 and 22 cm.
    3. The pillow according to claim 2, wherein the distance between the top of the said bump shaped portions (10, 12) is equal to 18 cm.
    4. The pillow according to one of the claims 1, 2 or 3, wherein the said hollow portion (14) comprises a slit (16) extending between the two lateral edges and being for avoiding side tensions on the supporting zones (22, 24) of the said bump shaped portions (10,12).
    5. The pillow according to claim 4, wherein the said slit (16) with a depth comprised between 2 and 6 cm is for folding easily the pillow by placing the said second downhill portion (12) under the said first uphill portion (10) so that the user can use the pillow in the lateral decubitus position.
    6. The pillow according to one of the claims 1 to 5, wherein the said bump shaped portions are made of polyurethane foam.
    7. The pillow according to claim 6, wherein the said polyurethane foam results of a mixing between a polyol and an isocyanate in proportions such that the index of the said foam is comprised between 60 and 70.
    8. The pillow according to claim 6, wherein the said first uphill portion (10) is made of a foam of which index is comprised between 60 and 65 and the resistance to indentation is comprised between 1,5 KPa and 2,5 KPa, and the second portion is made of a foam of which index is comprised between 65 and 70 and the resistance to indentation is comprised between 2,5 KPa and 3,5 KPa, so that the supporting points of the user (head and seventh cervical vertebra) are aligned.
    9. The pillow according to any of the precedent claims, being set in a pillowcase (38) of which parts (40, 42) recovering the said first and second portions (10, 12) contain polyester fibers.
    10. The pillow according to claim 1, wherein a first part (50) made of an elastic material of which resistance to indentation is comprised between 1,5 KPa and 3,5 KPa and having a memory effect with slow return, forms the said first portion supporting the user's head and is include in a second part (54) made of polyester fibers and forming the said second portion for supporting the user's seventh cervical vertebra.
    EP98936465A 1997-07-07 1998-07-07 Pillow for cervical comfort Expired - Lifetime EP1021115B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    FR9708568 1997-07-07
    FR9708568A FR2765464B1 (en) 1997-07-07 1997-07-07 CERVICAL COMFORT PILLOW
    PCT/FR1998/001458 WO1999002077A1 (en) 1997-07-07 1998-07-07 Pillow for cervical comfort

    Publications (2)

    Publication Number Publication Date
    EP1021115A1 EP1021115A1 (en) 2000-07-26
    EP1021115B1 true EP1021115B1 (en) 2002-04-10

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98936465A Expired - Lifetime EP1021115B1 (en) 1997-07-07 1998-07-07 Pillow for cervical comfort

    Country Status (5)

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    EP (1) EP1021115B1 (en)
    AT (1) ATE215792T1 (en)
    DE (1) DE69804831T2 (en)
    FR (1) FR2765464B1 (en)
    WO (1) WO1999002077A1 (en)

    Cited By (2)

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    US7735169B2 (en) 2002-05-24 2010-06-15 Tempur-Pedic Management, Inc. Comfort pillow
    US8656537B2 (en) 2006-04-20 2014-02-25 Dan Foam Aps Multi-component pillow and method of manufacturing and assembling same

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    Publication number Priority date Publication date Assignee Title
    DE10051327C1 (en) * 2000-10-12 2001-10-31 Pawel Sturz Health pillow has several separated chambers with middle chamber in head area extending into area of dorsal vertebra to relax lower neck column and stretch upper dorsal vertebra
    ATE305287T1 (en) 2001-08-07 2005-10-15 Marinko Lovrinovic PILLOW FOR POSITIONING PATIENTS

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    US4147825A (en) * 1975-09-15 1979-04-03 Anselm Talalay Polymeric foam cushioning article and method for making the same
    US4397052A (en) * 1980-12-15 1983-08-09 Lund Iii Richard G Prenatal support pillow
    DE3309438A1 (en) * 1983-03-16 1984-09-20 Alexander E. 8000 München Gehring Cushion
    US5016303A (en) * 1989-06-09 1991-05-21 Lumex, Inc. Cervical and head support pillow
    US5572757A (en) * 1995-03-06 1996-11-12 O'sullivan; Dennis C. Body support having hingedly connected semi-cylindrical cushions
    DE29600637U1 (en) * 1996-01-16 1996-05-09 Stn Schaumstoff Technik Nuernb Pillow
    DE59603622D1 (en) * 1996-06-05 1999-12-16 Gummo Italia Srl Neck support pillow and pillow core therefor

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US7735169B2 (en) 2002-05-24 2010-06-15 Tempur-Pedic Management, Inc. Comfort pillow
    US8656537B2 (en) 2006-04-20 2014-02-25 Dan Foam Aps Multi-component pillow and method of manufacturing and assembling same

    Also Published As

    Publication number Publication date
    FR2765464A1 (en) 1999-01-08
    EP1021115A1 (en) 2000-07-26
    FR2765464B1 (en) 1999-09-17
    ATE215792T1 (en) 2002-04-15
    WO1999002077A1 (en) 1999-01-21
    DE69804831D1 (en) 2002-05-16
    DE69804831T2 (en) 2002-11-07

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